DMRS determination method and apparatus, device, and storage medium

Abstract

The present application relates to the technical field of communications, and discloses a demodulation reference signal (DMRS) determination method and apparatus, a device, and a storage medium. The method comprises: determining a DMRS corresponding to a reference signal in a first reference signal group, wherein the reference signal in the first reference signal group and the DMRS corresponding to the reference signal in the first reference signal group are used for evaluating a first link quality, the DMRS corresponding to the reference signal in the first reference signal group is a first DMRS or a second DMRS, the first DMRS is a first-type DMRS or a second-type DMRS, the second DMRS is the second-type DMRS, and when two types of DMRSs are present, which type of DMRS is used as a hypothesis can be determined.

Description

DMRS determination method, device, equipment and storage medium Technical Field

[0001] The embodiments of the present application relate to the field of communication technology, and in particular to a method, apparatus, device, and storage medium for determining a demodulation reference signal (DMRS). Background Art

[0002] During communication transmission, DMRS and data signals occupy different time-frequency resources, meaning they are orthogonally placed on the time-frequency resources. Given a fixed total time-frequency resource allocation, an increase in DMRS resource overhead means fewer resources available for data signal transmission, resulting in a lower data signal transmission rate. The data signal refers to at least one of data and control information.

[0003] To address these shortcomings, related technologies have designed a DMRS that can be transmitted on the same time-frequency resources as data signals. However, the introduction of this DMRS, which can be transmitted on the same time-frequency resources as data signals, can affect relevant parameters in wireless communication systems. Therefore, determining the DMRS to use during communication is an urgent issue.

[0004] Summary of the Invention

[0005] The present application provides a method, apparatus, device, and storage medium for determining a DMRS. The technical solution is as follows:

[0006] According to one aspect of an embodiment of the present application, a method for determining a DMRS is provided, the method comprising:

[0007] Determining a DMRS corresponding to a reference signal in a first reference signal group;

[0008] The reference signals in the first reference signal group and the DMRS corresponding to the reference signals in the first reference signal group are used to evaluate the first link quality, the DMRS corresponding to the reference signals in the first reference signal group is a first DMRS or a second DMRS, the first DMRS is a first type DMRS or a second type DMRS, and the second DMRS is the second type DMRS.

[0009] According to another aspect of an embodiment of the present application, a method for determining a DMRS is provided, the method comprising:

[0010] Determining a DMRS corresponding to a candidate reference signal in a third reference signal group;

[0011] The candidate reference signals in the third reference signal group and the DMRS corresponding to the candidate reference signals in the third reference signal group are used to evaluate the third link quality, the DMRS corresponding to the candidate reference signals in the third reference signal group is the first DMRS or the second DMRS, the first DMRS is the first type DMRS or the second type DMRS, and the second DMRS is the second type DMRS.

[0012] According to another aspect of an embodiment of the present application, a method for determining a DMRS is provided, the method comprising:

[0013] receiving a first signal, where the first signal is used to respond to a target reference signal, where the target reference signal is a reference signal that meets a link quality condition among all candidate reference signals;

[0014] The first signal is transmitted based on a first DMRS, or the first signal is transmitted based on a second DMRS, the first DMRS is a first type DMRS or a second type DMRS, and the second DMRS is the second type DMRS.

[0015] According to another aspect of an embodiment of the present application, a method for determining a DMRS is provided, the method comprising:

[0016] Sending first indication information, where the first indication information is used to indicate a DMRS corresponding to a reference signal in a first reference signal group;

[0017] The reference signals in the first reference signal group and the DMRS corresponding to the reference signals in the first reference signal group are used to evaluate the first link quality, the DMRS corresponding to the reference signals in the first reference signal group is a first DMRS or a second DMRS, the first DMRS is a first type DMRS or a second type DMRS, and the second DMRS is the second type DMRS.

[0018] According to another aspect of an embodiment of the present application, a method for determining a DMRS is provided, the method comprising:

[0019] sending second indication information, where the second indication information is used to indicate a DMRS corresponding to a candidate reference signal in a third reference signal group;

[0020] The candidate reference signals in the third reference signal group and the DMRS corresponding to the candidate reference signals in the third reference signal group are used to evaluate the third link quality, the DMRS corresponding to the candidate reference signals in the third reference signal group is the first DMRS or the second DMRS, the first DMRS is the first type DMRS or the second type DMRS, and the second DMRS is the second type DMRS.

[0021] According to another aspect of an embodiment of the present application, a method for determining a DMRS is provided, the method comprising:

[0022] sending a first signal, where the first signal is used to respond to a target reference signal, where the target reference signal is a reference signal that meets a link quality condition among all candidate reference signals;

[0023] The first signal is transmitted based on a first DMRS, or the first signal is transmitted based on a second DMRS, the first DMRS is a first type DMRS or a second type DMRS, and the second DMRS is the second type DMRS.

[0024] According to another aspect of an embodiment of the present application, a device for determining a DMRS is provided, the device including:

[0025] a determination module, configured to determine a DMRS corresponding to a reference signal in a first reference signal group;

[0026] The reference signals in the first reference signal group and the DMRS corresponding to the reference signals in the first reference signal group are used to evaluate the first link quality, the DMRS corresponding to the reference signals in the first reference signal group is a first DMRS or a second DMRS, the first DMRS is a first type DMRS or a second type DMRS, and the second DMRS is the second type DMRS.

[0027] According to another aspect of an embodiment of the present application, a device for determining a DMRS is provided, the device including:

[0028] a determination module, configured to determine a DMRS corresponding to a candidate reference signal in a third reference signal group;

[0029] The candidate reference signals in the third reference signal group and the DMRS corresponding to the candidate reference signals in the third reference signal group are used to evaluate the third link quality, the DMRS corresponding to the candidate reference signals in the third reference signal group is the first DMRS or the second DMRS, the first DMRS is the first type DMRS or the second type DMRS, and the second DMRS is the second type DMRS.

[0030] According to another aspect of an embodiment of the present application, a device for determining a DMRS is provided, the device including:

[0031] a receiving module, configured to receive a first signal, where the first signal is used to respond to a target reference signal, where the target reference signal is a reference signal that meets a link quality condition among all candidate reference signals;

[0032] The first signal is transmitted based on a first DMRS, or the first signal is transmitted based on a second DMRS, the first DMRS is a first type DMRS or a second type DMRS, and the second DMRS is the second type DMRS.

[0033] According to another aspect of an embodiment of the present application, a device for determining a DMRS is provided, the device including:

[0034] a sending module, configured to send first indication information, where the first indication information is used to indicate a DMRS corresponding to a reference signal in a first reference signal group;

[0035] The reference signals in the first reference signal group and the DMRS corresponding to the reference signals in the first reference signal group are used to evaluate the first link quality, the DMRS corresponding to the reference signals in the first reference signal group is a first DMRS or a second DMRS, the first DMRS is a first type DMRS or a second type DMRS, and the second DMRS is the second type DMRS.

[0036] According to another aspect of an embodiment of the present application, a device for determining a DMRS is provided, the device including:

[0037] a sending module, configured to send second indication information, where the second indication information is used to indicate a DMRS corresponding to a candidate reference signal in a third reference signal group;

[0038] The candidate reference signals in the third reference signal group and the DMRS corresponding to the candidate reference signals in the third reference signal group are used to evaluate the third link quality, the DMRS corresponding to the candidate reference signals in the third reference signal group is the first DMRS or the second DMRS, the first DMRS is the first type DMRS or the second type DMRS, and the second DMRS is the second type DMRS.

[0039] According to another aspect of an embodiment of the present application, a device for determining a DMRS is provided, the device including:

[0040] a sending module, configured to send a first signal, where the first signal is used to respond to a target reference signal, where the target reference signal is a reference signal that meets a link quality condition among all candidate reference signals;

[0041] The first signal is transmitted based on a first DMRS, or the first signal is transmitted based on a second DMRS, the first DMRS is a first type DMRS or a second type DMRS, and the second DMRS is the second type DMRS.

[0042] According to another aspect of an embodiment of the present application, a computer-readable storage medium is provided, in which a computer program is stored. The computer program is loaded and executed by a processor to implement the DMRS determination method as described in the above aspects.

[0043] According to another aspect of an embodiment of the present application, a computer program product or computer program is provided, which includes computer instructions, and the computer instructions are stored in a computer-readable storage medium; a processor reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions to implement a method for determining DMRS as described in each aspect above.

[0044] The technical solutions provided by the embodiments of the present application may have the following beneficial effects:

[0045] By determining the DMRS corresponding to the reference signal in the first reference signal group, the terminal device can determine which DMRS to use as the DMRS hypothesis. By determining the DMRS used by the hypothetical control channel to evaluate the link quality of the beam, the accuracy of the link quality evaluation is improved when either of the two DMRSs may be used. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] FIG1 shows a schematic diagram of a DMRS provided by the related art;

[0047] FIG2 shows a schematic diagram of a DMRS provided by the related art;

[0048] FIG3 shows a transmission diagram of a downlink data channel provided in an embodiment of the present application;

[0049] FIG4 shows a flow chart of a communication system provided by an embodiment of the present application;

[0050] FIG5 shows a schematic diagram of a DMRS provided in an embodiment of the present application;

[0051] FIG6 shows a flowchart of a method for determining a DMRS provided in an embodiment of the present application;

[0052] FIG7 shows a schematic diagram of a method for determining a DMRS provided in an embodiment of the present application;

[0053] FIG8 shows a flowchart of a method for determining a DMRS provided in an embodiment of the present application;

[0054] FIG9 shows a schematic diagram of a method for determining a DMRS according to an embodiment of the present application;

[0055] FIG10 shows a flowchart of a method for determining a DMRS provided in an embodiment of the present application;

[0056] FIG11 shows a flowchart of a method for determining a DMRS provided in an embodiment of the present application;

[0057] FIG12 shows a flowchart of a method for determining a DMRS provided in an embodiment of the present application;

[0058] FIG13 shows a flowchart of a method for determining a DMRS provided in an embodiment of the present application;

[0059] FIG14 shows a flowchart of a method for determining a DMRS provided in an embodiment of the present application;

[0060] FIG15 shows a flowchart of a method for determining a DMRS provided in an embodiment of the present application;

[0061] FIG16 shows a flowchart of a method for determining a DMRS provided in an embodiment of the present application;

[0062] FIG17 shows a flowchart of a method for determining a DMRS provided in an embodiment of the present application;

[0063] FIG18 shows a flowchart of a method for determining a DMRS provided in an embodiment of the present application;

[0064] FIG19 shows a flowchart of a method for determining a DMRS provided in an embodiment of the present application;

[0065] FIG20 shows a flowchart of a method for determining a DMRS provided in an embodiment of the present application;

[0066] FIG21 shows a flowchart of a method for determining a DMRS provided in an embodiment of the present application;

[0067] FIG22 shows a flowchart of a method for determining a DMRS provided in an embodiment of the present application;

[0068] FIG23 shows a flowchart of a method for determining a DMRS provided in an embodiment of the present application;

[0069] FIG24 shows a flowchart of a method for determining a DMRS provided in an embodiment of the present application;

[0070] FIG25 shows a flowchart of a method for determining a DMRS provided in an embodiment of the present application;

[0071] FIG26 shows a flowchart of a method for determining a DMRS provided in an embodiment of the present application;

[0072] FIG27 shows a flowchart of a method for determining a DMRS provided in an embodiment of the present application;

[0073] FIG28 shows a flowchart of a method for determining a DMRS provided in an embodiment of the present application;

[0074] FIG29 shows a flowchart of a method for determining a DMRS provided in an embodiment of the present application;

[0075] FIG30 shows a flowchart of a method for determining a DMRS provided in an embodiment of the present application;

[0076] FIG31 shows a flowchart of a method for determining a DMRS provided in an embodiment of the present application;

[0077] FIG32 shows a flowchart of a method for determining a DMRS provided in an embodiment of the present application;

[0078] FIG33 shows a flowchart of a method for determining a DMRS provided in an embodiment of the present application;

[0079] FIG34 shows a flowchart of a method for determining a DMRS provided in an embodiment of the present application;

[0080] FIG35 shows a flowchart of a method for determining a DMRS provided in an embodiment of the present application;

[0081] FIG36 shows a flowchart of a method for determining a DMRS provided in an embodiment of the present application;

[0082] FIG37 shows a structural block diagram of a DMRS determination device provided in an embodiment of the present application;

[0083] FIG38 shows a structural block diagram of a DMRS determination device provided in an embodiment of the present application;

[0084] FIG39 shows a structural block diagram of a DMRS determination device provided in an embodiment of the present application;

[0085] FIG40 shows a structural block diagram of a DMRS determination device provided in an embodiment of the present application;

[0086] FIG41 shows a structural block diagram of a DMRS determination device provided in an embodiment of the present application;

[0087] FIG42 shows a structural block diagram of a DMRS determination device provided in an embodiment of the present application;

[0088] Figure 43 shows a structural diagram of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0089] In order to make the purpose, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail with reference to the accompanying drawings. The exemplary embodiments will be described in detail here, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims. With respect to the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0090] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. The singular forms "a", "said" and "the" used in this disclosure and the appended claims are also intended to include plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items. It should be understood that although the terms first, second, third, etc. may be used to describe various information in this disclosure, these information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0091] First, the relevant technologies involved in the embodiments of this application are introduced:

[0092] DMRS uses different time-frequency resources from data signals:

[0093] In related technologies, the basic workflow in a wireless communication system may include the following steps:

[0094] At the transmitter, the transmitted bit stream undergoes channel coding to generate coded bits, which are then modulated to produce modulation symbols. The modulation symbols and DMRS are inserted into the corresponding time-frequency resources and subsequently processed to produce orthogonal frequency-division multiplexing (OFDM) symbols or other multi-carrier symbols.

[0095] At the receiving end, the receiver measures the DMRS, demodulates the modulated symbols and performs channel decoding to ultimately obtain the information bits to be transmitted.

[0096] The above process can be used for downlink transmission (network device to terminal device transmission, downlink transmission, DL transmission), uplink transmission (terminal device to network device transmission, uplink transmission, UL transmission), or sidelink transmission (transmission between terminal devices or between network devices, i.e. sidelink transmission, SL transmission). In order to obtain the bit information transmitted by the transmitter, the receiver needs to use DMRS.

[0097] It should be noted that the "transmission" introduced in the embodiments of the present application can be both the transmission of data and the transmission of control information. For example, it can be one or more of the following: Physical Downlink Shared Channel (PDSCH), Physical Uplink Shared Channel (PUSCH), Physical Sidelink Shared Channel (PSSCH), Physical Downlink Control Channel (PDCCH), Physical Uplink Control Channel (PUCCH), Physical Sidelink Control Channel (PSCCH), and Physical Sidelink Feedback Channel (PSFCH).

[0098] Due to the complexity and time-varying nature of the wireless channel environment, in the above-mentioned system, the receiver's estimation and recovery of the wireless channel directly affects the final data recovery performance. In traditional communication systems, generally speaking, the DMRS of the control channel (i.e., the channel that transmits control information) is relatively fixed, and the DMRS density and / or DMRS pattern do not need to change dynamically. In this case, the design of the DMRS will be relatively conservative, that is, it can adapt to various environments of the wireless channel. For the data channel (i.e., the channel that transmits data), in order to reduce DMRS overhead, different DMRS densities and / or DMRS patterns can be designed. The communication system configures or instructs the receiving end which specific DMRS to use based on the current wireless channel environment.

[0099] The following is a brief introduction taking the DMRS in the fifth-generation communication (5th-Generation, 5G) new wireless (New Radio, NR) system as an example.

[0100] In NR systems, DMRS can be divided into pre-DMRS and post-DMRS. Pre-DMRS is typically located in the first few OFDM symbols of a time slot, while post-DMRS is a repetition of the pre-DMRS and is located in one or more subsequent OFDM symbols to ensure performance in high-speed scenarios. Pre-DMRS can consist of one or two OFDM symbols and is configured by network equipment. NR also supports two different types of DMRS, each occupying time-frequency resources differently.

[0101] For one type of DMRS, as shown in Figure 1, an example is given in which 7 OFDM symbols are included in the time domain and 12 subcarriers are included in the frequency domain. Two code division multiplexing (CDM) groups can be supported on one OFDM symbol. For example, the two filling shapes in Figure 1 correspond to two CDM groups, and each CDM group contains 6 subcarriers. Each CDM group can support two ports, and the two ports are orthogonalized by an orthogonal cover code (OCC), that is, the OCC code used by one port on different carriers is [+1, +1, +1, +1, +1, +1], and the OCC code used by the other port is [+1, -1, +1, -1, +1, -1]. In this way, one type of DMRS can support up to 4 orthogonal ports on one OFDM symbol and up to 8 orthogonal ports on two OFDM symbols.

[0102] For another type of DMRS, as shown in Figure 2, an example is given in which 7 OFDM symbols are included in the time domain and 12 subcarriers are included in the frequency domain. Three CDM groups can be supported on one OFDM symbol. For example, the three filling shapes in Figure 2 correspond to three CDM groups respectively, and each CDM group contains four adjacent subcarriers. Each CDM group can support two ports, and the two ports are orthogonalized by OCC, that is, the OCC code used by one port on different carriers is [+1, +1, +1, +1], and the OCC code used by the other port is [+1, -1, +1, -1]. In this way, another type of DMRS can support up to 6 orthogonal ports on one OFDM symbol and up to 12 orthogonal ports on two OFDM symbols.

[0103] In addition, each small grid in FIG1 and FIG2 represents a resource element (RE), and every 12 subcarriers in the frequency domain constitute a resource block (RB).

[0104] RE: It is the smallest time-frequency resource unit in the communication system. For example, in the NR system, one RE corresponds to one subcarrier in the frequency domain and one symbol in the time domain.

[0105] RB: It can be for K consecutive subcarriers in the frequency domain, or it can be for K consecutive subcarriers in the frequency domain and M consecutive symbols in the time domain. The value of K is a positive integer, and the value of M is a positive integer. For example, the typical value of K is 12, and it can also be other values, such as 2 to the power of n, that is, K can be 8 or 16 or other values. The typical value of M can be 6 or 7 or 14. In the embodiment of the present application, no distinction is made between RB and physical RB (Physical Resource Block, PRB).

[0106] In current communication systems, DMRS and data occupy different REs. That is, a single RE can hold either DMRS or data, but not both. Therefore, data and DMRS are orthogonal in time-frequency resources, meaning they do not overlap. This type of DMRS that does not overlap with data is also referred to as orthogonal DMRS. When a terminal device moves at a high speed, improving channel estimation performance often requires DMRS to occupy more symbols in the time domain. This means DMRS requires more RE resources, reducing the RE resources available for data.

[0107] PDCCH:

[0108] The network device indicates the transmission of PDCCH by configuring the Control Resource Set (CORESET) and the Search Space. It should be noted that the Search Space can also be called the Search Space Set. CORESET includes multiple PRBs in the frequency domain and 1 to 3 OFDM symbols in the time domain. The time domain resources occupied by CORESET are semi-statically configured by high-level parameters. The search space is a set of candidate PDCCHs (PDCCH candidates) at one or more aggregation levels. The aggregation level of the PDCCH actually sent by the network device can change over time. Since there is no relevant signaling to inform the terminal device, the terminal device needs to blindly detect the PDCCH at different aggregation levels. Among them, the PDCCH to be blindly detected is called a candidate PDCCH. The terminal device will decode the candidate PDCCH in the search space. If the cyclic redundancy check (CRC) passes, it is considered that the content of the decoded PDCCH is valid for the terminal device, and the information obtained by decoding can be used for subsequent operations.

[0109] In the 5G system PDCCH design, a resource-element group (REG) consists of 12 subcarriers on a symbol, and 6 REGs form a control channel element (CCE). The number of CCEs used by a candidate PDCCH reflects the aggregation level. In the 5G system, the aggregation level can be 1, 2, 4, 8, or 16, corresponding to 1 CCE, 2 CCEs, 4 CCEs, 8 CCEs, and 16 CCEs, respectively.

[0110] In NR, within each downlink bandwidth part (Bandwidth Part, BWP) of each serving cell, the network device can configure up to 10 search spaces / search space sets for the terminal device. The search space / search space set is configured with time domain configuration information to indicate the time domain position of the terminal device to detect the PDCCH. At the same time, the network device configures an associated CORESET identifier for each search space / search space set, and the terminal device can obtain the physical resources of the search space / search space set in the frequency domain through the CORESET identifier. Each search space / search space set has a uniquely associated CORESET identifier. Different search spaces / search space sets can be associated with the same CORESET identifier. The UE determines the time and frequency domain position of the candidate PDCCH based on the time domain, frequency domain and other parameters corresponding to the search space / search space set.

[0111] When configuring a CORESET, the network device configures one or a group of Transmission Configuration Indicator states (TCI states) for each CORESET. The TCI state is used to indicate the relevant parameters required by the terminal device for demodulation detection of the PDCCH candidate associated with the CORESET. When the network device configures a group of TCI states for a CORESET, the network device activates a TCI state for the CORESET through Medium Access Control (MAC) Control Element (CE) signaling to assist the terminal device in demodulating the corresponding PDCCH.

[0112] In addition, the network device also configures a high-level index for each CORESET to indicate whether they are from the same Transmission and Reception Point (TRP). The same high-level index is used to indicate that the CORESETs are from the same TRP.

[0113] Multi-beam system:

[0114] The design goals of the 5G NR system include high-bandwidth communications in high-frequency bands. As the operating frequency of communication equipment increases, path loss increases during transmission, affecting the coverage capability of the high-frequency system. To effectively ensure the coverage of high-band NR systems, an effective technical solution is to use multi-beam technology based on large-scale antenna arrays to improve coverage.

[0115] In related technologies, a cell (sector) uses a relatively wide beam to cover the entire cell, so that at every moment, terminal devices within the cell coverage area have the opportunity to obtain transmission resources allocated by the system.

[0116] 5G NR's multi-beam system uses different beams to cover the entire cell. Each beam covers a smaller area, achieving the effect of multiple beams covering the entire cell. Different beams are distinguished by the different signals they carry. For example, different beams transmit different synchronization signal blocks (SSBs) or different channel state information reference signals (CSI-RSs).

[0117] In a multi-beam system, PDCCH and PDSCH can be transmitted through different downlink transmit beams.

[0118] For systems below 5G, terminal devices generally do not have analog beams, so omnidirectional antennas (or nearly omnidirectional antennas) are used to receive signals sent by different downlink transmission beams of network devices.

[0119] In millimeter wave systems, terminal devices may have analog beams, requiring them to use the corresponding downlink receive beam to receive signals from the network device's corresponding downlink transmit beam. In this case, beam indication information is required to assist the terminal in determining the beam. Multi-beam systems may also be used in sixth-generation (6G) communication systems in the future.

[0120] In the NR protocol, beam indication information does not directly indicate the beam itself, but rather indicates it through Quasi Co-Location (QCL) between signals. When receiving signals, the terminal device can use the characteristics of the transmission environment corresponding to the data transmission to improve the reception algorithm in order to improve the reception performance. For example, the statistical characteristics of the channel can be used to optimize the design and parameters of the channel estimator. In the NR system, these characteristics corresponding to the data transmission are represented by QCL information (QCL-Info).

[0121] During downlink transmission, if the signal comes from different TRPs / panels / beams, the characteristics of the transmission environment corresponding to the data transmission may also change. Therefore, in the NR system, when the network device transmits the downlink control channel or data channel, it will indicate the corresponding QCL information to the terminal device through the TCI status.

[0122] A TCI state can contain one or more of the following configuration options:

[0123] TCI status identifier, used to identify a TCI status;

[0124] One or more QCL information.

[0125] Each QCL information contains one or more options of the following information:

[0126] QCL type configuration;

[0127] QCL reference signal configuration.

[0128] The QCL type configuration can be any of QCL typeA, QCL typeB, QCL typeC, and QCL typeD (in the subsequent description, QCL will be omitted in some places for simplicity, such as directly writing typeA). The QCL reference signal configuration includes one or more of the cell identifier where the reference signal is located, the BWP identifier, and the reference signal identifier. The definitions of different QCL type configurations are as follows:

[0129] 'QCL typeA': {Doppler shift, Doppler spread, average delay, delay spread};

[0130] 'QCL typeB': {Doppler shift, Doppler spread};

[0131] 'QCL typeC': {Doppler shift, average delay};

[0132] 'QCL typeD': {spatial reception parameters}.

[0133] In the NR system, the network device can indicate the corresponding TCI status for the downlink signal or downlink channel.

[0134] If the network device configures the QCL reference signal of the downlink channel or downlink signal to SSB or CSI-RS through the TCI state, and the QCL type is configured to typeA, typeB or typeC, the terminal device can assume that the downlink signal is the same as the large-scale parameter of the configured SSB or CSI-RS, which is determined by the QCL type configuration.

[0135] Similarly, if the network device configures the QCL reference signal of the downlink channel or downlink signal to SSB or CSI-RS through the TCI state, and the QCL type is configured to typeD, the terminal device can use the same receiving beam as the configured SSB or CSI-RS to receive the downlink signal. Typically, the downlink channel or downlink signal and the configured SSB or CSI-RS are transmitted by the same TRP or the same panel or the same beam. If the transmission TRP or transmission panel or transmission beam of two downlink channels or two downlink signals is different, the network device will usually configure different TCI states.

[0136] For the downlink control channel, the TCI status of the corresponding CORESET may be indicated through Radio Resource Control (RRC) signaling or a combination of RRC signaling and MAC signaling.

[0137] For downlink data channels, the available TCI state set is indicated via RRC signaling, some of which are activated via MAC signaling. Finally, the TCI state indication field in the downlink control information (DCI) indicates one or two TCI states from the activated TCI states for use in the DCI-scheduled PDSCH. For example, as shown in Figure 3, RRC signaling indicates that the TCI state set includes A candidate TCI states; MAC signaling then activates B of the A candidate TCI states, resulting in B activated TCI states; and finally, DCI indicates one or two used TCI states; the value of A is a positive integer, the value of B is a positive integer, and the value of A is greater than or equal to B.

[0138] 4 shows a schematic diagram of a communication system provided by an exemplary embodiment of the present application. The communication system includes a network device 110 and a terminal device 120, and / or a terminal device 120 and a terminal device 130, which are not limited in the present application.

[0139] The network device 110 in the present application provides wireless communication functions, and the network device 110 includes but is not limited to: Evolved Node B (eNB), Radio Network Controller (RNC), Node B (NB), Base Station Controller (BSC), Base Transceiver Station (BTS), Home Base Station (e.g., Home Evolved Node B, or Home Node B, HNB), Baseband Unit (BBU), Access Point (AP) in Wireless Fidelity (Wi-Fi) system, Wireless Relay Node, Wireless Backhaul Node, Transmission Point (TP) or Transmission and Reception Point (TRP), etc., and can also be the Next Generation Node B (NGNB) in the 5th Generation (5G) mobile communication system. B, gNB) or transmission point (TRP or TP), or one or a group of (including multiple antenna panels) antenna panels of a base station in a 5G system, or it can also be a network node constituting a gNB or transmission point, such as a baseband unit (BBU) or a distributed unit (DU), or a base station in a Beyond Fifth Generation (B5G) or a Sixth Generation (6G) mobile communication system, or a core network (CN), fronthaul (Fronthaul), backhaul (Backhaul), radio access network (RAN), network slicing, or a serving cell, primary cell (PCell), primary secondary cell (PSCell), special cell (SpCell), secondary cell (SCell), neighboring cell, etc. of a terminal device.

[0140] The terminal device 120 and / or terminal device 130 in this application are also called user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, and user device. The terminals include, but are not limited to, handheld devices, wearable devices, vehicle-mounted devices, and Internet of Things devices, such as mobile phones, tablet computers, e-book readers, laptop computers, desktop computers, televisions, game consoles, mobile Internet devices (MIDs), augmented reality (AR) terminals, virtual reality (VR) terminals, and mixed reality (MR) terminals, wearable devices, handles, electronic tags, controllers, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical care, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, wireless terminals in remote medical surgery, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loops (WLANs), and wireless terminals in industrial control. Loop (WLL) stations, personal digital assistants (PDAs), TV set-top boxes (STBs), customer premises equipment (CPEs), etc.

[0141] Network device 110 and terminal device 120 communicate with each other via an air interface technology, such as a Uu interface. For example, there are two communication scenarios between network device 110 and terminal device 120: uplink communication and downlink communication. Uplink communication refers to sending signals to network device 110; downlink communication refers to sending signals to terminal device 120.

[0142] Terminal device 120 and terminal device 130 communicate with each other via an air interface technology, such as a Uu interface. For example, there are two communication scenarios between terminal device 120 and terminal device 130: a first sideline communication scenario and a second sideline communication scenario. First sideline communication refers to sending signals to terminal device 130; second sideline communication refers to sending signals to terminal device 120.

[0143] Terminal device 120 and terminal device 130 are both within the network coverage and located in the same cell, or terminal device 120 and terminal device 130 are both within the network coverage but located in different cells, or terminal device 120 is within the network coverage but terminal device 130 is outside the network coverage.

[0144] The technical solutions provided in the embodiments of the present application can be applied to various communication systems, such as: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, Advanced Long Term Evolution (LTE-A) system, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, fifth generation (5G) mobile communication system, New Radio (NR) system, NR system evolution system, LTE on unlicensed spectrum (LTE-based access to unlicensed spectrum). spectrum, LTE-U) system, NR (NR-based access to unlicensed spectrum, NR-U) system on unlicensed spectrum, terrestrial communication network (TN) system, non-terrestrial communication network (NTN) system, wireless local area network (WLAN), wireless fidelity (Wi-Fi), cellular Internet of Things system, cellular passive Internet of Things system, and may also be applicable to subsequent evolution systems of 5G NR system, and may also be applicable to beyond fifth generation mobile communication system (B5G), sixth generation mobile communication system (6G) and subsequent evolution systems. In some embodiments of the present application, "NR" may also be referred to as 5G NR system or 5G system.Among them, the 5G mobile communication system may include non-standalone networking (NSA) and / or standalone networking (SA).

[0145] The technical solutions provided in the embodiments of the present application can also be applied to machine type communication (MTC), long term evolution technology for machine-to-machine communication (LTE-M), device-to-device (D2D) network, machine-to-machine (M2M) network, Internet of Things (IoT) network or other networks. Among them, the IoT network can include, for example, the Internet of Vehicles. Among them, the communication mode in the Internet of Vehicles system is collectively referred to as vehicle to other devices (Vehicle to X, V2X, X can represent anything), for example, the V2X can include: vehicle to vehicle (V2V) communication, vehicle to infrastructure (V2I) communication, vehicle to pedestrian communication (V2P) or vehicle to network (V2N) communication, etc.

[0146] The communication system provided in this embodiment can be applied to, but is not limited to, one or more of the following communication scenarios: uplink communication scenario, downlink communication scenario, and sidelink communication scenario.

[0147] In some embodiments, a communication system includes multiple different DMRSs for a control channel. These multiple different DMRSs may be of the same type or different types. For example, assume that the communication system includes two DMRSs for a control channel, namely a first DMRS and a second DMRS. This application uses two different DMRSs as an example, and can be easily expanded to include more different DMRSs, which will not be described in detail.

[0148] Optionally, the first DMRS and the second DMRS are of the same type of DMRS. For example, the first DMRS is a DMRS that uses different resource elements from the control information, or it is understood that the resource elements used by the first DMRS are different from the resource elements used by the control information, or it is understood that the resource elements used by the first DMRS and the resource elements used by the control information do not overlap, or it is understood that the first DMRS and the control information are orthogonal in time-frequency resources. The second DMRS is a DMRS that uses different resource elements from the control information, or it is understood that the resource elements used by the second DMRS are different from the resource elements used by the control information, or it is understood that the resource elements used by the second DMRS and the resource elements used by the control information do not overlap, or it is understood that the second DMRS and the control information are orthogonal in time-frequency resources. The above-mentioned DMRS that uses different resource elements from the control information is a DMRS that has been used in related technologies, and the use of this type of DMRS can reduce the complexity of the communication system.

[0149] Optionally, the first DMRS and the second DMRS are DMRSs of different types. For example, the first DMRS is a DMRS that uses one or more of the same resource elements as the control information, or it is understood that one or more resource elements in the first DMRS are also resource elements used by the control information. The second DMRS is a DMRS that uses different resource elements from the control information, or it is understood that the resource elements used by the second DMRS are different from the resource elements used by the control information, or it is understood that the resource elements used by the second DMRS and the resource elements used by the control information do not overlap, or it is understood that the second DMRS and the control information are orthogonal in time-frequency resources. Using the above-mentioned DMRS that uses one or more of the same resource elements as the control information can ensure the amount of resources used for data transmission when the time-frequency resources are fixed, thereby ensuring the data transmission rate.

[0150] In some embodiments, different types of DMRS include a first type DMRS and a second type DMRS. The first type DMRS is a DMRS that uses one or more of the same resource elements as control information, and the second type DMRS is a DMRS that uses different resource elements than the control information. This application uses two DMRS types as an example, and it is easily expanded to more DMRS types, so each of them will not be described in detail.

[0151] In some embodiments, the positions of the same resource elements used by the first type DMRS and the control information are optional. Exemplarily, as shown in FIG5 , an example is given in which 12 subcarriers are included in the frequency domain. The positions of the same resource elements used by the first type DMRS and the control information are shown in FIG5 (a), which are the positions of the 2nd, 5th, 8th, and 11th subcarriers on each symbol; or the positions of the same resource elements used by the first type DMRS and the control information are shown in FIG5 (b), with two symbols as a group, corresponding to the positions of the 3rd, 6th, 9th, and 12th subcarriers on the first symbol of the two symbols and the positions of the 2nd, 5th, 8th, and 11th subcarriers on the second symbol. Exemplarily, the first type DMRS and the control information use exactly the same resource elements.

[0152] It should be noted that in a CDMA system, although the pilot signal and the data signal can be transmitted on the same time-frequency resource, both the pilot signal and the data signal need to undergo additional spread spectrum processing. For example, the pilot signal and the data signal need to use different orthogonal codes to distinguish them. In other words, in the CDMA of the related art, the pilot signal and the data signal transmitted on the same time-frequency resource are the pilot signal and the data signal after spread spectrum processing. When receiving, it is necessary to separate the pilot signal and the data signal by using a despreading code to achieve final demodulation. The embodiment of the present application is mainly applied to OFDM systems and other systems based on multiple sub-carriers. The modulation symbols of the data signal and the modulation symbols of the demodulation pilot signal can be directly transmitted on the same time-frequency resource. The pilot signal and the data signal do not need to undergo additional spread spectrum processing. When receiving, an advanced receiver is required for demodulation. That is, in the embodiment of the present application, the pilot signal and the data signal transmitted on the same time-frequency resource can be the pilot signal and the data signal that have not undergone spread spectrum processing.

[0153] In some embodiments, a first terminal device receives DMRS indication information sent by a network device and / or a second terminal device, where the DMRS indication information is used to instruct the first terminal device to determine a target DMRS for use by a control channel. The target DMRS may be a first-type DMRS or a second-type DMRS. By sending the DMRS indication information, the network device can flexibly configure the DMRS used by the control channel, thereby better matching the wireless environment and improving system performance.

[0154] Optionally, which DMRS type the first DMRS corresponds to (for example, whether the first DMRS is a first-type DMRS or a second-type DMRS) is pre-specified by a protocol and / or configured by a network.

[0155] Optionally, which DMRS type the second DMRS corresponds to (e.g., whether the second DMRS is a first-type DMRS or a second-type DMRS) is pre-specified by a protocol and / or configured by a network. In a typical implementation, the second DMRS is a second-type DMRS, for example, by pre-specifying that the second DMRS is a second-type DMRS without requiring network configuration.

[0156] Some typical combinations of the first DMRS and the second DMRS are:

[0157] The first DMRS is a second-type DMRS, and the second DMRS is a second-type DMRS;

[0158] The first DMRS is a first-type DMRS, and the second DMRS is a second-type DMRS.

[0159] The above typical combinations are only for example, and other combinations are not excluded. Other combinations can be directly obtained based on the above description and are not listed one by one.

[0160] Optionally, when the DMRS indication information is sent by the network device, the control channel corresponds to a downlink control channel, such as PDCCH. Optionally, when the DMRS indication information is sent by the second terminal device, the control channel corresponds to a sidelink control channel, such as PSCCH.

[0161] Optionally, the DMRS indication information may be implemented through one or more of the following messages / signaling:

[0162] Broadcast messages;

[0163] System messages;

[0164] RRC signaling;

[0165] MAC CE signaling;

[0166] DCI signaling;

[0167] Downlink messages during random access;

[0168] Artificial Intelligence (AI) / Machine Learning (ML)-specific signaling

[0169] When the DMRS indication information is indicated through a broadcast message and / or a system message, all terminal devices can be notified at one time, thereby reducing the total signaling overhead.

[0170] When DMRS indication information is indicated via RRC signaling and / or MAC CE signaling and / or DCI signaling, it can be configured individually for each terminal device, making it more targeted and beneficial for improving the performance of each terminal device. Furthermore, RRC signaling has higher reliability than MAC CE signaling and DCI signaling; MAC CE signaling has lower latency than RRC signaling and higher reliability than DCI signaling; and DCI signaling has lower latency than both RRC signaling and MAC CE signaling. In other words, the reliability of RRC signaling is greater than the reliability of MAC CE signaling, and the reliability of DCI signaling is greater than that of RRC signaling, and the latency of RRC signaling is greater than that of MAC CE signaling, which is greater than the latency of DCI signaling.

[0171] Downlink messages during random access can be pre-configured, which helps improve communication system performance. AI / ML-specific signaling helps improve communication efficiency.

[0172] In some embodiments, any of the above-mentioned messages / signaling may be combined or matched. For example, DMRS indication information may be indicated via RRC signaling and MAC CE signaling. Alternatively, DMRS indication information may be indicated via a broadcast message and a system message. The same signaling / message may also be multiple messages of the same type. For example, DMRS indication information may be indicated via multiple RRC signaling messages.

[0173] In some embodiments, the DMRS indication information includes at least one first field, which is used to indicate the target DMRS. For example, the target DMRS may be the first DMRS or the second DMRS, and the target DMRS may be a first-type DMRS or a second-type DMRS. Optionally, different values ​​of the first field are used to determine whether the target DMRS is the first-type DMRS or the second-type DMRS. Exemplarily, the values ​​of the first field include one or more of the following options:

[0174] First value;

[0175] Second value.

[0176] When the value of the first field is a first value, the target DMRS is determined to be the first DMRS; when the value of the first field is a second value, the target DMRS is determined to be the second DMRS. Alternatively, when the value of the first field is a first value, the target DMRS is determined to be the second DMRS; when the value of the first field is a second value, the target DMRS is determined to be the first DMRS. The value of the first field can flexibly indicate any DMRS.

[0177] Optionally, the target DMRS is determined to be the first DMRS or the second DMRS based on the configuration of the first domain. For example, when the first domain is configured, the target DMRS is determined to be the first DMRS; when the first domain is not configured, the target DMRS is determined to be the second DMRS. Alternatively, when the first domain is configured, the target DMRS is determined to be the second DMRS; when the first domain is not configured, the target DMRS is determined to be the first DMRS. Optionally, when the first domain is configured, the value of the first domain can be "enabled" or "supported", or other related forms. Determining the target DMRS based on the configuration of the first domain can save signaling overhead.

[0178] Optionally, the DMRS indication information indicates whether the target DMRS is the first type DMRS or the second type DMRS by configuring different fields through a CHOICE structure. In this case, as an embodiment, the DMRS indication information may be transmitted through RRC signaling.

[0179] In some embodiments, the DMRS indication information is configured for one or more of the following objects:

[0180] For a cell or a carrier, it can reduce signaling overhead;

[0181] For PSCCH configuration, it can reduce signaling overhead;

[0182] For CORESET configuration, each CORESET can be controlled more flexibly with greater freedom;

[0183] ·For CORESET group configuration, each CORESET group can be controlled more flexibly with greater freedom;

[0184] ·Configured for search space, it can flexibly control each search space with greater freedom;

[0185] Configuration for search space groups provides flexible control over each search space group, with greater freedom. A search space group can contain one or more search spaces or search space sets.

[0186] In some embodiments, to avoid the ambiguity phase when switching between different DMRSs and improve system stability, the above DMRS indication information is not used in the following situations:

[0187] CORESET numbered 0, i.e. CORESET 0;

[0188] Search space numbered 0, i.e. Search Space 0;

[0189] CORESET corresponding to search space number 0;

[0190] A search space for receiving a first system message;

[0191] The CORESET corresponding to the search space used to receive the first system message;

[0192] Search space for receiving other system messages;

[0193] CORESET corresponding to the search space used to receive other system messages;

[0194] Search space used for paging;

[0195] CORESET corresponding to the search space used for paging;

[0196] Search space for random access;

[0197] CORESET corresponding to the search space used for random access.

[0198] In some embodiments, the DMRS indication information indicates the power parameter of the target DMRS. Alternatively, the power parameter of the target DMRS is predetermined, such as predetermined by a protocol or predetermined by broadcast information. In the embodiments of the present application, "power" can also be expanded to mean "energy" without limitation. If the power parameter of the target DMRS is indicated by the DMRS indication information, the indication method of the power parameter of the target DMRS is more flexible, and the system can flexibly determine the power parameter of the target DMRS; if the power parameter of the target DMRS is predetermined, signaling overhead can be saved.

[0199] In some embodiments, the DMRS indication information indicates the frequency domain resource density and / or frequency domain resource location of the target DMRS. Alternatively, the frequency domain resource density and / or frequency domain resource location of the target DMRS is pre-specified, such as by a protocol or by broadcast information. In some embodiments, the DMRS indication information indicates the time domain density and / or time domain resource location of the target DMRS. In some embodiments, the DMRS indication information indicates sequence generation parameters of the target DMRS.

[0200] For beam failure detection:

[0201] In some embodiments, a first terminal device evaluates link quality based on a first reference signal group, where the first reference signal group includes one or more reference signals. Optionally, the first reference signal group corresponds to a first Transient Receiving Point (TRP), and each reference signal in the first reference signal group is associated with a beam of the first TRP. Optionally, the reference signal is a CSI-RS and / or an SSB. Optionally, the reference signal is a periodic signal.

[0202] Optionally, the first terminal device further evaluates the link quality based on a second reference signal group, where the second reference signal group includes one or more reference signals. Optionally, the second reference signal group corresponds to a second Transient Receiving Point (TRP), and each reference signal in the second reference signal group is associated with a beam of the second TRP. Optionally, the reference signal is a CSI-RS and / or an SSB. Optionally, the reference signal is a periodic signal.

[0203] Optionally, the first terminal device evaluates the link quality based on the first reference signal group and the second reference signal group, respectively. Optionally, the first terminal device jointly evaluates the link quality based on the first reference signal group and the second reference signal group. The link quality can be used to indicate or evaluate whether a target event has occurred, such as whether a beam failure has occurred. The conditions for the occurrence of the target event include one or more of the following options:

[0204] The link quality is less than the first threshold;

[0205] The number of consecutive times that the link quality is less than the first threshold is greater than or equal to a preset value (denoted as the E1th number threshold), where the preset value can be pre-defined or network-configured. For example, for a periodic reference signal, this measurement is performed once based on the measurement result of each signal. If the link quality is less than the first threshold for N1_successive consecutive times, then the target event is determined to have occurred. The value of N1_successive is a positive integer.

[0206] The number of times that the link quality is less than the second threshold within the first target time (or the first target time window, i.e., the first target window) is greater than or equal to the first number threshold;

[0207] The difference between the link quality and the third threshold is greater than the first difference threshold;

[0208] The number of consecutive times that the difference between the link quality and the third threshold is greater than the first difference threshold is greater than or equal to a preset value (denoted as the E2th number threshold), where the preset value can be pre-defined or network-configured. For example, for a periodic reference signal, this is performed once based on the measurement result of each signal. If the difference between the link quality and the third threshold for N2_successive consecutive times is greater than the first difference threshold, then the target event is determined to have occurred. The value of N2_successive is a positive integer.

[0209] In some embodiments, the first terminal device may evaluate the link quality in one or more ways. For example, the first terminal device may evaluate the link quality based on the reference signal received power (RSRP) of the reference signal. Or, the first terminal device may evaluate the link quality based on the signal to interference plus noise ratio (SINR) of the reference signal. Or, the first terminal device may evaluate the link quality based on the transmission quality of the control channel. For example, the link quality is evaluated based on the hypothetical block error rate (BLER), that is, the hypothetical BLER.

[0210] When the first terminal device evaluates the link quality based on the control channel transmission quality, different DMRSs have different effects on the control channel transmission. The reasons are as follows:

[0211] Different DMRS may result in different available resources for control information transmission. For example, when DMRS and control information transmission use different REs, control information uses different REs occupied by DMRS; when DMRS and control information transmission can share some or all REs, more REs can be used for control information; for another example, when DMRS and control information transmission use different REs, different DMRSs themselves may also occupy different resources;

[0212] Different DMRSs interfere with control information in different ways;

[0213] There are differences in the channel estimation performance of different DMRSs.

[0214] Therefore, when two DMRSs exist, it is necessary to determine the DMRS corresponding to the link quality evaluation. This can also be understood as determining which DMRS assumption to use to evaluate link quality, or which DMRS to use to evaluate link quality, or which DMRS to use as an assumption for evaluating link quality.

[0215] It should be noted that in some embodiments of the present application, "DMRS" can be expanded to mean DMRS pattern, that is, the position of DMRS in the time and frequency domains, DMRS type, DMRS sequence, or DMRS pattern. The meanings of these terms can be considered equivalent and interchangeable in the embodiments of the present application. The embodiments of the present application do not provide a detailed description of these terms. However, it should be understood that these terms are not limited in the embodiments of the present application.

[0216] FIG6 shows a flow chart of a method for determining a DMRS provided by an exemplary embodiment of the present application. The method is executed by a first terminal device and includes:

[0217] Step 220: Determine the DMRS corresponding to the reference signal in the first reference signal group.

[0218] In some embodiments, the reference signals in the first reference signal group and the DMRS corresponding to the reference signals in the first reference signal group are used to evaluate the first link quality. Alternatively, it can be understood that the first link quality is evaluated in combination with the reference signals in the first reference signal group and the DMRS corresponding to the reference signals in the first reference signal group. The reference signals in the first reference signal group are used to evaluate the first link quality, and the DMRS corresponding to the reference signals are also used to evaluate the first link quality. That is, the first link quality is evaluated based on the reference signals in the first reference signal group, or based on the reference signals in the first reference signal group and the corresponding DMRS.

[0219] In some embodiments, the first link quality is the link quality corresponding to a reference signal in the first reference signal group. Alternatively, it can be understood that the first link quality is the link quality of the beam corresponding to the reference signal in the first reference signal group. For example, the first reference signal group is associated with TRP1, and each reference signal in the first reference signal group is associated with a beam of TRP1. The first link quality is used to indicate whether a target event has occurred, such as beam failure.

[0220] Exemplarily, as shown in FIG7 , each beam of TRP1 corresponds to a reference signal, and each beam covers a different communication range. The terminal device can evaluate the link quality based on the reference signals corresponding to different beams and the DMRS corresponding to the reference signals. For example, the terminal device can evaluate the link quality of beam 1 based on the reference signal corresponding to beam 1 and / or evaluate the link quality of beam 2 based on the reference signal corresponding to beam 2, or the terminal device can evaluate the current link quality based on the reference signal corresponding to beam 1 and the reference signal corresponding to beam 2. For example, when the terminal device is in the communication area covered by beam 2, the link quality of beam 1 evaluated based on the reference signal corresponding to beam 1 does not meet the link quality condition, that is, a beam failure occurs. For another example, when the terminal device is in a certain communication area, the link quality evaluated based on the reference signal corresponding to beam 1 and the reference signal corresponding to beam 2 does not meet the link quality condition (for example, both beam 1 and beam 2 links are very poor), then it is considered that the target event (i.e., beam failure) has occurred. For another example, the terminal device can evaluate the link quality of beam 1 based on the reference signal corresponding to beam 1 and the DMRS corresponding to beam 1, and evaluate the link quality of beam 2 based on the reference signal corresponding to beam 2 and the DMRS corresponding to beam 2. If there are two types of DMRS corresponding to beams 1 / 2, it is necessary to determine the DMRS corresponding to the reference signal in the first reference signal group, or in other words, determine the DMRS type or DMRS hypothesis corresponding to the beam associated with the reference signal in the first reference signal group. The DMRS type or DMRS hypothesis is used to evaluate the link quality of the beam. In this example, beams are introduced for simplicity of explanation. In the protocol, beams may not be considered or may not be explicitly mentioned. Instead, reference signals may be considered directly. For example, the "reference signal corresponding to beam 1" mentioned above can be directly replaced with "reference signal RS1", the "reference signal corresponding to beam 2" can be directly replaced with "reference signal RS2", the "link quality of beam 1" can be replaced with "link quality corresponding to reference signal RS1", and the "link quality of beam 2" can be replaced with "link quality corresponding to reference signal RS2", and so on. In this application, the terms "reference signal" and "link quality corresponding to the reference signal" are used for description, but they can also be understood as "reference signal corresponding to the beam" and "link quality of the beam", and will not be described one by one in the embodiments of this application.

[0221] In some embodiments, different DMRSs may affect the final transmission performance in a wireless link environment. Possible factors include one or more of the following: different DMRSs occupy different overheads, different interference between different DMRSs and data signals, and different channel estimation performance of different DMRSs. Therefore, when two DMRSs are present, it is necessary to determine which DMRS to use as the DMRS for the assumed control channel.

[0222] In some embodiments, it is determined that the DMRS corresponding to the reference signal in the first reference signal group is a first DMRS or a second DMRS. The DMRS corresponding to the reference signal in the first reference signal group is a first-type DMRS or a second-type DMRS, wherein the first-type DMRS is a DMRS that uses one or more of the same resource elements as control information, and the second-type DMRS is a DMRS that uses different resource elements than the control information. The first DMRS may be the first-type DMRS or the second-type DMRS, and the second DMRS may be the second-type DMRS.

[0223] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0224] In some embodiments, the DMRS corresponding to the reference signal in the first reference signal group is determined to be a first DMRS. Alternatively, the first DMRS corresponding to the reference signal in the first reference signal group is used as a DMRS hypothesis, or the first DMRS corresponding to the reference signal in the first reference signal group is assumed to be used to evaluate link quality. Optionally, the first DMRS is a first-type DMRS.

[0225] In some embodiments, determining that the DMRS corresponding to the reference signal in the first reference signal group is a second DMRS. Alternatively, it can be understood that the second DMRS corresponding to the reference signal in the first reference signal group is used as a DMRS hypothesis, or that the second DMRS corresponding to the reference signal in the first reference signal group is used to evaluate link quality. Optionally, the second DMRS is a second-type DMRS.

[0226] The method provided in this embodiment enables a terminal device to determine which DMRS to use as a DMRS hypothesis by determining the DMRS corresponding to the reference signal in the first reference signal group. By determining the DMRS used by the hypothetical control channel and evaluating the link quality of the beam, the accuracy of link quality assessment is improved when either of two DMRSs may be used.

[0227] In some embodiments, the reference signals in the first reference signal group are indicated by first indication information.

[0228] Optionally, the first terminal device receives first indication information sent by the network device or the second terminal device, and the first indication information is used to indicate or configure the reference signal in the first reference signal group. Optionally, the first indication information is also used to indicate parameter information related to the target event. For example, the first indication information is also used to indicate one or more of the first threshold, the first target time, the second threshold, the first number threshold, the third threshold, the first difference threshold, the E1 number threshold, and the E2 number threshold related to the target event. Optionally, the first indication information is sent through one or more of RRC signaling, MAC CE signaling, and DCI signaling.

[0229] It's worth noting that communication protocols generally don't specify the relationship between reference signals and beams. However, in actual communications, it can be simply understood as one reference signal corresponding to one beam. Therefore, when evaluating the link quality corresponding to a reference signal, you're actually evaluating the link quality corresponding to the beam.

[0230] In a further embodiment based on the embodiment shown in FIG6 , the above step 220 may be replaced by the following sub-steps:

[0231] Step 221: Determine the DMRS corresponding to each reference signal in the first reference signal group indicated by the first indication information.

[0232] The DMRS corresponding to each reference signal is used to evaluate the link quality corresponding to each reference signal.

[0233] In a case where the first indication information indicates a DMRS corresponding to each reference signal in the first reference signal group, the DMRS corresponding to each reference signal in the first reference signal group indicated by the first indication information is determined to be the DMRS corresponding to each reference signal in the first reference signal group when evaluating link quality.

[0234] The DMRS corresponding to each reference signal in the first reference signal group is a first DMRS or a second DMRS. The DMRS corresponding to each reference signal in the first reference signal group is a first-type DMRS or a second-type DMRS. The target DMRSs corresponding to different reference signals are the same or different. A first-type DMRS is a DMRS that uses one or more of the same resource elements as control information, and a second-type DMRS is a DMRS that uses different resource elements than control information. The first DMRS can be a first-type DMRS or a second-type DMRS, and the second DMRS can be a second-type DMRS. In some embodiments, the first DMRS is a first-type DMRS and the second DMRS is a second-type DMRS; or, the first DMRS is a second-type DMRS and the second DMRS is a second-type DMRS.

[0235] Exemplarily, assuming that the first reference signal group includes three reference signals, namely a first reference signal, a second reference signal, and a third reference signal, when the first indication information indicates that the DMRS corresponding to the first reference signal is the first DMRS, the DMRS corresponding to the second reference signal is the first DMRS, and the DMRS corresponding to the third reference signal is the second DMRS, it is determined that the first reference signal and the first DMRS corresponding to the first reference signal are used to evaluate the link quality corresponding to the first reference signal, the second reference signal and the first DMRS corresponding to the second reference signal are used to evaluate the link quality corresponding to the second reference signal, and the third reference signal and the second DMRS corresponding to the third reference signal are used to evaluate the link quality corresponding to the third reference signal.

[0236] For example, as shown in Figure 7, beam 1 corresponds to the first reference signal, and beam 2 corresponds to the second reference signal. When the first indication information indicates that the DMRS corresponding to the first reference signal corresponding to beam 1 is the first DMRS, and the DMRS corresponding to the second reference signal corresponding to beam 2 is the second DMRS, the first DMRS corresponding to the first reference signal is used as the DMRS hypothesis used when evaluating the link quality of beam 1, and the second DMRS corresponding to the second reference signal is used as the DMRS hypothesis used when evaluating the link quality of beam 2.

[0237] The method provided in the embodiment of the present application determines the DMRS corresponding to each reference signal in the first reference signal group as the DMRS corresponding to each reference signal in the first reference signal group, so that it is possible to flexibly determine which DMRS to use as an assumption, thereby enabling a more accurate judgment of the link quality. In this method, different DMRSs are allowed to be used as assumptions for different beams, thereby assisting the communication system in more flexibly configuring different DMRSs on different beams, thereby achieving greater flexibility. Different beams correspond to different DMRSs, so in order to evaluate the link quality of the two beams, different DMRSs need to be considered.

[0238] In a further embodiment based on the embodiment shown in FIG6 , the above step 220 may be replaced by the following sub-steps:

[0239] Step 222: When the first indication information indicates that there is a DMRS corresponding to the first reference signal group, determine that the DMRS corresponding to the first reference signal group is the DMRS corresponding to each reference signal in the first reference signal group.

[0240] The DMRS corresponding to each reference signal is used to evaluate the link quality corresponding to each reference signal.

[0241] The DMRS corresponding to the first reference signal group is the first DMRS or the second DMRS, and the DMRS corresponding to the first reference signal group is the first type DMRS or the second type DMRS. The first DMRS can be the first type DMRS or the second type DMRS, and the second DMRS can be the second type DMRS. The first type DMRS is a DMRS that uses one or more of the same resource elements as the control information, and the second type DMRS is a DMRS that uses different resource elements than the control information. In some embodiments, the first DMRS is the first type DMRS and the second DMRS is the second type DMRS; or, the first DMRS is the second type DMRS and the second DMRS is the second type DMRS. The DMRS corresponding to the first reference signal group represents the DMRS configured with the entire group as the granularity, and each reference signal in the first reference signal group corresponds to the same DMRS.

[0242] In some embodiments, when the first indication information indicates that the DMRS corresponding to the first reference signal group is the first DMRS, the DMRS corresponding to each reference signal in the first reference signal group is determined to be the first DMRS. That is, the first DMRS is used to evaluate the link quality corresponding to each reference signal in the first reference signal group.

[0243] In some embodiments, when the first indication information indicates that the DMRS corresponding to the first reference signal group is the second DMRS, the DMRS corresponding to each reference signal in the first reference signal group is determined to be the second DMRS. That is, the second DMRS is used to evaluate the link quality corresponding to each reference signal in the first reference signal group.

[0244] For example, assuming that the first reference signal group includes three reference signals, namely a first reference signal, a second reference signal, and a third reference signal. When the first indication information indicates that the DMRS corresponding to the first reference signal group is the first DMRS, it is determined that the DMRSs corresponding to the first reference signal, the second reference signal, and the third reference signal are all first DMRSs, and the first reference signal and the first DMRS are used to evaluate the link quality corresponding to the first reference signal, the second reference signal and the first DMRS are used to evaluate the link quality corresponding to the second reference signal, and the third reference signal and the first DMRS are used to evaluate the link quality corresponding to the third reference signal. Alternatively, when the first indication information indicates that the DMRS corresponding to the first reference signal group is the second DMRS, it is determined that the DMRSs corresponding to the first reference signal, the second reference signal, and the third reference signal are all second DMRSs, and the first reference signal and the second DMRS are used to evaluate the link quality corresponding to the first reference signal, the second reference signal and the second DMRS are used to evaluate the link quality corresponding to the second reference signal, and the third reference signal and the second DMRS are used to evaluate the link quality corresponding to the third reference signal.

[0245] For example, as shown in Figure 7, beam 1 corresponds to the first reference signal, and beam 2 corresponds to the second reference signal. When the first indication information indicates that the DMRS corresponding to the first reference signal group is the first DMRS, the DMRS corresponding to the first reference signal corresponding to beam 1 is the first DMRS, and the DMRS corresponding to the second reference signal corresponding to beam 2 is also the first DMRS, then the first DMRS corresponding to the first reference signal group is used as the DMRS hypothesis used to evaluate the link quality of beam 1 and beam 2.

[0246] The method provided in the embodiment of the present application can effectively save signaling overhead while determining which DMRS to use to evaluate the link quality of the beam by determining the DMRS corresponding to the first reference signal group as the DMRS corresponding to each reference signal in the first reference signal group.

[0247] In a further embodiment based on the embodiment shown in FIG6 , the above step 220 may be replaced by the following sub-steps:

[0248] Step 223: Based on the DMRS used by the control channel, determine the DMRS corresponding to each reference signal in the first reference signal group.

[0249] The DMRS corresponding to each reference signal is used to evaluate the link quality corresponding to each reference signal.

[0250] In some embodiments, the first terminal device receives configuration information of a control channel, and the configuration information of the control channel includes a DMRS used by the control channel. Optionally, the DMRS used by the control channel is a first DMRS or a second DMRS, and the DMRS used by the control channel is a first type DMRS or a second type DMRS. The first DMRS may be a first type DMRS or a second type DMRS, and the second DMRS may be a second type DMRS. In some embodiments, the first DMRS is a first type DMRS, and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS, and the second DMRS is a second type DMRS. The first type DMRS is a DMRS that uses one or more of the same resource elements as the control information, and the second type DMRS is a DMRS that uses different resource elements from the control information.

[0251] In some embodiments, when the control channel uses a first DMRS, the first DMRS is determined to be the DMRS corresponding to each reference signal in the first reference signal group, and the first DMRS is used as the DMRS hypothesis adopted when evaluating the link quality corresponding to each reference signal in the first reference signal group.

[0252] In some embodiments, when the control channel uses a second DMRS, the second DMRS is determined to be the DMRS corresponding to each reference signal in the first reference signal group, and the second DMRS is used as the DMRS hypothesis adopted when evaluating the link quality corresponding to each reference signal in the first reference signal group.

[0253] In some embodiments, when the control channel does not use the first DMRS, the second DMRS is determined to be the DMRS corresponding to each reference signal in the first reference signal group. The second DMRS is then used as the DMRS hypothesis adopted when evaluating the link quality corresponding to each reference signal in the first reference signal group. In some embodiments, when the control channel does not use the second DMRS, the first DMRS is determined to be the DMRS corresponding to each reference signal in the first reference signal group. The first DMRS is then used as the DMRS hypothesis adopted when evaluating the link quality corresponding to each reference signal in the first reference signal group. For example, in this case, the first DMRS is a first-type DMRS and the second DMRS is a second-type DMRS.

[0254] The method provided in the embodiment of the present application determines the DMRS corresponding to each reference signal in the first reference signal group based on the DMRS used by the control channel, and does not require additional first indication information to indicate the DMRS, thereby effectively saving signaling overhead.

[0255] In some embodiments, in a further embodiment based on the embodiment shown in FIG. 6 , the above step 220 may be replaced by the following sub-steps:

[0256] Step 224: Determine the target DMRS as the DMRS corresponding to each reference signal in the first reference signal group.

[0257] The DMRS corresponding to each reference signal is used to evaluate the link quality corresponding to each reference signal.

[0258] The target DMRS is a first DMRS or a second DMRS, in which case the first DMRS is a first-type DMRS or a second-type DMRS, and the second DMRS is a second-type DMRS. A first-type DMRS is a DMRS that uses one or more of the same resource elements as control information, and a second-type DMRS is a DMRS that uses different resource elements than control information. In some embodiments, the first DMRS is a first-type DMRS and the second DMRS is a second-type DMRS; or, the first DMRS is a second-type DMRS and the second DMRS is a second-type DMRS.

[0259] The target DMRS is a default DMRS, or in other words, the target DMRS corresponds to a default DMRS type.

[0260] In some embodiments, the first DMRS is determined to be the DMRS corresponding to each reference signal in the first reference signal group, and the first DMRS is used as the DMRS hypothesis adopted when evaluating the link quality corresponding to each reference signal in the first reference signal group.

[0261] In some embodiments, the second DMRS is determined to be the DMRS corresponding to each reference signal in the first reference signal group, and the second DMRS is used as the DMRS hypothesis adopted when evaluating the link quality corresponding to each reference signal in the first reference signal group.

[0262] The method provided in the embodiment of the present application can determine which DMRS to adopt as a hypothesis without requiring other indication information by determining the target DMRS as the DMRS corresponding to each reference signal in the first reference signal group, thereby effectively saving signaling overhead.

[0263] In some embodiments, the first indication information does not indicate a reference signal in the first reference signal group. The reference signals in the first reference signal group are determined based on configuration information of a control channel.

[0264] Optionally, the reference signals in the first reference signal group are determined based on the TCI state corresponding to the target CORESET in the control channel. When one TCI state corresponds to at least two reference signals, the reference signals in the first reference signal group are determined based on the reference signal corresponding to QCL type D.

[0265] In a further embodiment based on the embodiment shown in FIG6 , the above step 220 may be replaced by the following sub-steps:

[0266] Step 225: When the first reference signal in the first reference signal group is determined based on the TCI state corresponding to the target CORESET in the control channel, determine that the DMRS corresponding to the target CORESET is the DMRS corresponding to the first reference signal in the first reference signal group.

[0267] The DMRS corresponding to the first reference signal is used to evaluate the link quality corresponding to the first reference signal.

[0268] In some embodiments, the DMRS corresponding to the target CORESET can also be understood as the DMRS used by the PDCCH transmitted in the target CORESET. The DMRS corresponding to the target CORESET is the first DMRS or the second DMRS, and the DMRS corresponding to the target CORESET is the first type DMRS or the second type DMRS. The first DMRS can be the first type DMRS or the second type DMRS, and the second DMRS can be the second type DMRS. The first type DMRS is a DMRS that uses one or more of the same resource elements as the control information, and the second type DMRS is a DMRS that uses different resource elements than the control information. In some embodiments, the first DMRS is the first type DMRS and the second DMRS is the second type DMRS; or, the first DMRS is the second type DMRS and the second DMRS is the second type DMRS.

[0269] The target CORESET is a CORESET used to determine a first reference signal, where the first reference signal is determined based on a TCI state corresponding to the target CORESET in a control channel.

[0270] In some embodiments, when the DMRS corresponding to the target CORESET is a first DMRS, the DMRS corresponding to the first reference signal in the first reference signal group is determined to be the first DMRS. The first DMRS is used as the DMRS hypothesis adopted when evaluating the link quality corresponding to the first reference signal. For example, in this case, the first DMRS is a first type DMRS.

[0271] In some embodiments, when the DMRS corresponding to the target CORESET is a second DMRS, the DMRS corresponding to the first reference signal in the first reference signal group is determined to be the second DMRS. The second DMRS is then used as the DMRS hypothesis adopted when evaluating the link quality corresponding to the first reference signal. For example, in this case, the second DMRS is a second type DMRS.

[0272] The method provided in the embodiments of the present application determines the DMRS corresponding to the first reference signal in the first reference signal group by referencing the DMRS corresponding to the target CORESET. This allows for more accurate determination of which DMRS to use as an assumption in response to the actual transmission process. Furthermore, no additional first indication information is required to indicate the DMRS, effectively saving signaling overhead.

[0273] In a further embodiment based on the embodiment shown in FIG6 , the above step 220 may be replaced by the following sub-steps:

[0274] Step 226: Determine the DMRS corresponding to each reference signal in the first reference signal group based on the DMRSs corresponding to multiple CORESETs corresponding to the reference signals in the first reference signal group.

[0275] The DMRS corresponding to each reference signal is used to evaluate the link quality corresponding to each reference signal.

[0276] In some embodiments, when one or more of the multiple CORESETs corresponding to the reference signals in the first reference signal group correspond to a first DMRS, the first DMRS is determined to be the DMRS corresponding to each reference signal in the first reference signal group. The first DMRS is then used as the DMRS hypothesis adopted when evaluating the link quality corresponding to each reference signal in the first reference signal group. For example, in this case, the first DMRS is a first type DMRS.

[0277] In some embodiments, when one or more of the multiple CORESETs corresponding to the reference signals in the first reference signal group correspond to a second DMRS, the second DMRS is determined to be the DMRS corresponding to each reference signal in the first reference signal group. The second DMRS is then used as the DMRS hypothesis adopted when evaluating the link quality corresponding to each reference signal in the first reference signal group. For example, in this case, the second DMRS is a second-type DMRS.

[0278] In some embodiments, when multiple CORESETs corresponding to reference signals in a first reference signal group all use a first DMRS, the first DMRS is determined to be the DMRS corresponding to each reference signal in the first reference signal group. The first DMRS is then used as the DMRS hypothesis adopted when evaluating the link quality corresponding to each reference signal in the first reference signal group. For example, in this case, the first DMRS is a first type DMRS.

[0279] In some embodiments, when multiple CORESETs corresponding to reference signals in a first reference signal group all use a second DMRS, the second DMRS is determined to be the DMRS corresponding to each reference signal in the first reference signal group. The second DMRS is then used as the DMRS hypothesis adopted when evaluating the link quality corresponding to each reference signal in the first reference signal group. For example, in this case, the second DMRS is a second-type DMRS. The first DMRS may be a first-type DMRS or a second-type DMRS, and the second DMRS may be a second-type DMRS. A first-type DMRS is a DMRS that uses one or more of the same resource elements as control information, and a second-type DMRS is a DMRS that uses different resource elements than control information. In some embodiments, the first DMRS is a first-type DMRS and the second DMRS is a second-type DMRS; or, the first DMRS is a second-type DMRS and the second DMRS is a second-type DMRS.

[0280] The method provided in the embodiments of the present application determines the DMRS corresponding to each reference signal in the first reference signal group based on the DMRSs corresponding to multiple CORESETs corresponding to the reference signals in the first reference signal group. This method can effectively reduce signaling overhead while determining which DMRS to use as a hypothesis. Furthermore, in scenarios where multiple CORESETs exist, the DMRS corresponding to each reference signal can be more reasonably determined.

[0281] In some embodiments, in a further embodiment based on the embodiment shown in FIG. 6 , the above step 220 may be replaced by the following sub-steps:

[0282] Step 227: Determine the target DMRS as the DMRS corresponding to each reference signal in the first reference signal group.

[0283] The DMRS corresponding to each reference signal is used to evaluate the link quality corresponding to each reference signal.

[0284] The target DMRS is a first DMRS or a second DMRS, in which case the first DMRS is a first-type DMRS or a second-type DMRS, and the second DMRS is a second-type DMRS. A first-type DMRS is a DMRS that uses one or more of the same resource elements as control information, and a second-type DMRS is a DMRS that uses different resource elements than control information. In some embodiments, the first DMRS is a first-type DMRS and the second DMRS is a second-type DMRS; or, the first DMRS is a second-type DMRS and the second DMRS is a second-type DMRS.

[0285] The target DMRS is a default DMRS, or in other words, the target DMRS corresponds to a default DMRS type.

[0286] In some embodiments, the first DMRS is determined to be the DMRS corresponding to each reference signal in the first reference signal group, and the first DMRS is used as the DMRS hypothesis adopted when evaluating the link quality corresponding to each reference signal in the first reference signal group.

[0287] In some embodiments, the second DMRS is determined to be the DMRS corresponding to each reference signal in the first reference signal group, and the second DMRS is used as the DMRS hypothesis adopted when evaluating the link quality corresponding to each reference signal in the first reference signal group.

[0288] The method provided in the embodiment of the present application can determine which DMRS to adopt as a hypothesis without requiring other indication information by determining the target DMRS as the DMRS corresponding to each reference signal in the first reference signal group, thereby effectively saving signaling overhead.

[0289] In some embodiments, the reference signals in the first reference signal group are determined based on a TCI state corresponding to a target search space in the control channel.

[0290] When a TCI state corresponds to at least two reference signals, the reference signals in the first reference signal group are determined based on the reference signals corresponding to QCL type D. In a further embodiment based on the embodiment shown in FIG6 , step 220 may be replaced by the following sub-steps:

[0291] Step 228: When the second reference signal in the first reference signal group is determined based on the TCI state corresponding to the target search space in the control channel, determine that the DMRS corresponding to the target search space is the DMRS corresponding to the second reference signal.

[0292] The DMRS corresponding to the second reference signal is used to evaluate the link quality corresponding to the second reference signal.

[0293] In some embodiments, the DMRS corresponding to the target search space can also be understood as the DMRS used by the PDCCH transmitted in the target search space. The DMRS corresponding to the target search space is the first DMRS or the second DMRS, and the DMRS corresponding to the target search space is the first type DMRS or the second type DMRS. Among them, the first type DMRS is a DMRS that uses one or more of the same resource elements as the control information, and the second type DMRS is a DMRS that uses different resource elements than the control information. Among them, the first DMRS can be the first type DMRS or the second type DMRS, and the second DMRS can be the second type DMRS. In some embodiments, the first DMRS is the first type DMRS and the second DMRS is the second type DMRS; or, the first DMRS is the second type DMRS and the second DMRS is the second type DMRS.

[0294] The second reference signal is determined based on a TCI state corresponding to a target search space in the control channel.

[0295] In some embodiments, when the DMRS corresponding to the target search space is a first DMRS, the DMRS corresponding to the second reference signal in the first reference signal group is determined to be the first DMRS. The first DMRS is then used as the DMRS hypothesis adopted when evaluating the link quality corresponding to the second reference signal. For example, in this case, the first DMRS is a first type DMRS.

[0296] In some embodiments, when the DMRS corresponding to the target search space is a second DMRS, the DMRS corresponding to the second reference signal in the first reference signal group is determined to be the second DMRS. The second DMRS is then used as the DMRS hypothesis adopted when evaluating the link quality corresponding to the second reference signal. For example, in this case, the second DMRS is a second type DMRS.

[0297] The method provided in the embodiments of the present application determines the DMRS corresponding to the second reference signal in the first reference signal group by referring to the DMRS corresponding to the target search space. This allows for more accurate determination of the DMRS to be used as an assumption in accordance with the actual transmission process. Furthermore, no additional first indication information is required to indicate the DMRS, effectively saving signaling overhead.

[0298] In a further embodiment based on the embodiment shown in FIG6 , the above step 220 may be replaced by the following sub-steps:

[0299] Step 229: Determine the DMRS corresponding to each reference signal in the first reference signal group based on the DMRSs corresponding to multiple search spaces corresponding to the reference signals in the first reference signal group.

[0300] The DMRS corresponding to each reference signal is used to evaluate the link quality corresponding to each reference signal.

[0301] In some embodiments, when one or more search spaces among a plurality of search spaces corresponding to reference signals in a first reference signal group correspond to a first DMRS, the first DMRS is determined to be the DMRS corresponding to each reference signal in the first reference signal group. The first DMRS is then used as a DMRS hypothesis for evaluating the link quality corresponding to each reference signal in the first reference signal group. For example, in this case, the first DMRS is a first-type DMRS.

[0302] In some embodiments, when one or more search spaces among the multiple search spaces corresponding to the reference signals in the first reference signal group correspond to a second DMRS, the second DMRS is determined to be the DMRS corresponding to each reference signal in the first reference signal group. The second DMRS is then used as the DMRS hypothesis adopted when evaluating the link quality corresponding to each reference signal in the first reference signal group. For example, in this case, the second DMRS is a second-type DMRS.

[0303] In some embodiments, when all of the multiple search spaces corresponding to the reference signals in the first reference signal group use the first DMRS, the first DMRS is determined to be the DMRS corresponding to each reference signal in the first reference signal group. The first DMRS is then used as the DMRS hypothesis adopted when evaluating the link quality corresponding to each reference signal in the first reference signal group. For example, in this case, the first DMRS is a first-type DMRS.

[0304] In some embodiments, when all multiple search spaces corresponding to reference signals in a first reference signal group use a second DMRS, the second DMRS is determined to be the DMRS corresponding to each reference signal in the first reference signal group. The second DMRS is then used as the DMRS hypothesis adopted when evaluating the link quality corresponding to each reference signal in the first reference signal group. For example, in this case, the second DMRS is a second-type DMRS. The first DMRS may be a first-type DMRS or a second-type DMRS, and the second DMRS may be a second-type DMRS. A first-type DMRS is a DMRS that uses one or more of the same resource elements as control information, while a second-type DMRS is a DMRS that uses different resource elements than control information.

[0305] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0306] The method provided in the embodiments of the present application determines the DMRS corresponding to each reference signal in the first reference signal group based on the DMRSs corresponding to multiple search spaces corresponding to the reference signals in the first reference signal group. This method can effectively reduce signaling overhead while determining which DMRS to use as a hypothesis. Furthermore, in scenarios where multiple search spaces exist, the DMRS corresponding to each reference signal can be more reasonably determined.

[0307] In some embodiments, in a further embodiment based on the embodiment shown in FIG. 6 , the above step 220 may be replaced by the following sub-steps:

[0308] Step 230: Determine the target DMRS as the DMRS corresponding to each reference signal in the first reference signal group.

[0309] The DMRS corresponding to each reference signal is used to evaluate the link quality corresponding to each reference signal.

[0310] The target DMRS is the first DMRS or the second DMRS, in which case the first DMRS is a first-type DMRS or a second-type DMRS, and the second DMRS is a second-type DMRS. The first-type DMRS is a DMRS that uses one or more of the same resource elements as the control information, and the second-type DMRS is a DMRS that uses different resource elements than the control information.

[0311] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0312] The target DMRS is a default DMRS, or in other words, the target DMRS corresponds to a default DMRS type.

[0313] In some embodiments, the first DMRS is determined to be the DMRS corresponding to each reference signal in the first reference signal group, and the first DMRS is used as the DMRS hypothesis adopted when evaluating the link quality corresponding to each reference signal in the first reference signal group.

[0314] In some embodiments, the second DMRS is determined to be the DMRS corresponding to each reference signal in the first reference signal group, and the second DMRS is used as the DMRS hypothesis adopted when evaluating the link quality corresponding to each reference signal in the first reference signal group.

[0315] The method provided in the embodiment of the present application can determine which DMRS to adopt as a hypothesis without requiring other indication information by determining the target DMRS as the DMRS corresponding to each reference signal in the first reference signal group, thereby effectively saving signaling overhead.

[0316] It is worth noting that any of the above steps 221 to 230 can be implemented as a separate embodiment.

[0317] The above embodiment is for a beam failure detection scenario of a single TRP. In some embodiments, the beam failure detection scenario of two TRPs also includes the following embodiments:

[0318] In some embodiments, for the case of two reference signal groups: the first reference signal group corresponds to one or more reference signals, and the second reference signal group corresponds to one or more reference signals. At this time, it is assumed that the first indication information indicates which DMRS (first DMRS or second DMRS) is used for the reference signal corresponding to the first reference signal group and which DMRS (first DMRS or second DMRS) is used for the reference signal corresponding to the second reference signal group. When the first terminal device evaluates the link quality based on the first reference signal group, it is assumed that the DMRS corresponding to the reference signal in the first reference signal group is used; when the first terminal device evaluates the link quality based on the second reference signal group, it is assumed that the DMRS corresponding to the reference signal in the second reference signal group is used. Specifically, as described in the following embodiments:

[0319] FIG8 shows a flow chart of a method for determining a DMRS provided by an exemplary embodiment of the present application. The method is executed by a first terminal device and includes:

[0320] Step 240: Determine the DMRS corresponding to the reference signals in the first reference signal group and the DMRS corresponding to the reference signals in the second reference signal group.

[0321] In some embodiments, the method for determining the DMRS corresponding to the reference signals in the first reference signal group refers to the above steps 220 to 230. This will not be described in detail in the following embodiments.

[0322] In some embodiments, the reference signals in the second reference signal group and the DMRS corresponding to the reference signals in the second reference signal group are used to evaluate the second link quality. Alternatively, it can be understood that the second link quality is evaluated in combination with the reference signals in the second reference signal group and the DMRS corresponding to the reference signals in the second reference signal group. The reference signals in the second reference signal group are used to evaluate the second link quality, and the DMRS corresponding to the reference signals are also used to evaluate the second link quality. That is, the second link quality is evaluated based on the reference signals in the second reference signal group, or based on the reference signals in the second reference signal group and the corresponding DMRS.

[0323] In some embodiments, the second link quality is the link quality corresponding to the reference signals in the second reference signal group. Alternatively, it can be understood that the second link quality is the link quality of the beams corresponding to the reference signals in the second reference signal group. For example, the second reference signal group is associated with TRP2, and each reference signal in the second reference signal group is associated with a beam of TRP2.

[0324] The second link quality is used to indicate whether a target event occurs, such as whether a beam failure occurs.

[0325] In some embodiments, the first terminal device evaluates the first link quality based on the reference signal in the first reference signal group, and / or evaluates the second link quality based on the reference signal in the second reference signal group. For example, as shown in FIG9 , each beam of TRP1 corresponds to a reference signal in the first reference signal group, and each beam of TRP2 also corresponds to a reference signal in the second reference signal group, and each beam covers a different communication range. The terminal device can evaluate the link quality based on the reference signals corresponding to different beams, and can also evaluate the link quality based on the DMRS corresponding to different reference signals. For example, the terminal device can evaluate the link quality based on the reference signal corresponding to beam 1 of TRP1 and / or evaluate the link quality based on the reference signal corresponding to beam 2 of TRP2. When the terminal device is in the communication area covered by beam 2 of TRP2, the link quality evaluated based on the reference signal corresponding to beam 1 of TRP1 does not meet the link quality condition, that is, a beam failure occurs. For another example, the terminal device can evaluate the link quality of beam 1 based on the reference signal corresponding to beam 1 and the DMRS corresponding to beam 1, and evaluate the link quality of beam 2 based on the reference signal corresponding to beam 2 and the DMRS corresponding to beam 2. If there are two types of DMRSs corresponding to beam 1 / 2, it is necessary to determine the DMRS corresponding to the reference signal associated with beam 1 / 2.

[0326] In some embodiments, it is determined that the DMRS corresponding to the reference signals in the second reference signal group is a first DMRS or a second DMRS. The DMRS corresponding to the reference signals in the second reference signal group is a first-type DMRS or a second-type DMRS. The first-type DMRS is a DMRS that uses one or more of the same resource elements as the control information, and the second-type DMRS is a DMRS that uses different resource elements than the control information.

[0327] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0328] In some embodiments, the DMRS corresponding to the reference signal in the second reference signal group is determined to be a first DMRS. Alternatively, it can be understood that the first DMRS corresponding to the reference signal in the second reference signal group is used as an assumption, or it is assumed that the first DMRS corresponding to the reference signal in the second reference signal group is used to evaluate link quality. Optionally, in this case, the first DMRS is a first-type DMRS.

[0329] In some embodiments, the DMRS corresponding to the reference signals in the second reference signal group is determined to be a second DMRS. Alternatively, the second DMRS corresponding to the reference signals in the second reference signal group is assumed to be used, or the link quality is assessed assuming that the second DMRS corresponding to the reference signals in the second reference signal group is used. Optionally, the second DMRS is a second-type DMRS.

[0330] The method provided in this embodiment enables a terminal device to determine which DMRS to use as a hypothesis by determining the DMRS corresponding to the reference signal in the second reference signal group. By determining the DMRS used by the hypothetical control channel, the accuracy of link quality assessment is improved when either of the two DMRSs may be used.

[0331] In addition, when the DMRS corresponding to the reference signals in the first reference signal group and the DMRS corresponding to the reference signals in the second reference signal group are determined simultaneously, it is possible to better match multi-point transmission.

[0332] In some embodiments, the reference signals in the second reference signal group are indicated by first indication information.

[0333] Optionally, the first terminal device receives first indication information sent by the network device or the second terminal device, where the first indication information is used to indicate or configure the reference signals in the first reference signal group and the reference signals in the second reference signal group.

[0334] In a further embodiment based on the embodiment shown in FIG8 , the step of determining the DMRS corresponding to the reference signal in the second reference signal group may be replaced by the following sub-steps:

[0335] Step 241: Determine the DMRS corresponding to each reference signal in the second reference signal group indicated by the first indication information.

[0336] In a case where the first indication information indicates that each reference signal in the second reference signal group corresponds to a DMRS, the DMRS corresponding to each reference signal in the second reference signal group indicated by the first indication information is determined to be the DMRS corresponding to each reference signal in the second reference signal group when evaluating the link quality.

[0337] The DMRS corresponding to each reference signal in the second reference signal group may be a first DMRS or a second DMRS, and the DMRSs corresponding to different reference signals may be the same or different. The DMRS corresponding to each reference signal in the second reference signal group may be a first-type DMRS or a second-type DMRS, where the first-type DMRS uses one or more of the same resource elements as the control information, and the second-type DMRS uses different resource elements than the control information.

[0338] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0339] For example, assuming that the second reference signal group includes three reference signals, namely a first reference signal, a second reference signal, and a third reference signal. When the first indication information indicates that the DMRS corresponding to the first reference signal is a first DMRS, the DMRS corresponding to the second reference signal is a first DMRS, and the DMRS corresponding to the third reference signal is a second DMRS, the first DMRS corresponding to the first reference signal is determined to be the DMRS used when evaluating the link quality of beam 1, the first DMRS corresponding to the second reference signal is determined to be the DMRS used when evaluating the link quality of beam 2, and the second DMRS corresponding to the third reference signal is determined to be the DMRS used when evaluating the link quality of beam 3. For example, in this case, the first DMRS is a first-type DMRS, and the second DMRS is a second-type DMRS.

[0340] The method provided in the embodiment of the present application determines the DMRS corresponding to each reference signal in the second reference signal group as the DMRS corresponding to each reference signal in the second reference signal group, so that it is possible to flexibly determine which DMRS to use as an assumption, thereby enabling a more accurate judgment of the link quality. In this method, different DMRSs are allowed to be used as assumptions for different beams, thereby assisting the communication system in more flexibly configuring different DMRSs on different beams, thereby obtaining greater flexibility. Different beams correspond to different DMRS types, so in order to evaluate the link quality of the two beams, different DMRS types need to be considered.

[0341] In a further embodiment based on the embodiment shown in FIG8 , the step of determining the DMRS corresponding to the reference signal in the second reference signal group may be replaced by the following sub-steps:

[0342] Step 242: When the first indication information indicates that there is a DMRS corresponding to the second reference signal group, determine that the DMRS corresponding to the second reference signal group is the DMRS corresponding to each reference signal in the second reference signal group.

[0343] The DMRS corresponding to each reference signal is used to evaluate the link quality corresponding to each reference signal.

[0344] The DMRS corresponding to the second reference signal group is a first DMRS or a second DMRS. The DMRS corresponding to the second reference signal group is a first-type DMRS or a second-type DMRS, where the first-type DMRS is a DMRS that uses one or more of the same resource elements as the control information, and the second-type DMRS is a DMRS that uses different resource elements than the control information.

[0345] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0346] The DMRS corresponding to the second reference signal group represents a DMRS configured with the entire group as the granularity, and each reference signal in the second reference signal group corresponds to the same DMRS.

[0347] In some embodiments, when the first indication information indicates that the DMRS corresponding to the second reference signal group is the first DMRS, the DMRS corresponding to each reference signal in the second reference signal group is determined to be the first DMRS. That is, the first DMRS is used to evaluate the link quality corresponding to each reference signal in the second reference signal group.

[0348] In some embodiments, when the first indication information indicates that the DMRS corresponding to the second reference signal group is the second DMRS, the DMRS corresponding to each reference signal in the second reference signal group is determined to be the second DMRS. That is, the second DMRS is used to evaluate the link quality corresponding to each reference signal in the second reference signal group.

[0349] Exemplarily, assuming that the second reference signal group includes three reference signals, namely a first reference signal, a second reference signal, and a third reference signal. When the first indication information indicates that the DMRS corresponding to the second reference signal group is the first DMRS, it is determined that the DMRSs corresponding to the first reference signal, the second reference signal, and the third reference signal are all first DMRSs, and the first reference signal and the first DMRS are used to evaluate the link quality corresponding to the first reference signal, the second reference signal and the first DMRS are used to evaluate the link quality corresponding to the second reference signal, and the third reference signal and the first DMRS are used to evaluate the link quality corresponding to the third reference signal. Alternatively, when the first indication information indicates that the DMRS corresponding to the second reference signal group is the second DMRS, it is determined that the DMRSs corresponding to the first reference signal, the second reference signal, and the third reference signal are all second DMRSs, and the first reference signal and the second DMRS are used to evaluate the link quality corresponding to the first reference signal, the second reference signal and the second DMRS are used to evaluate the link quality corresponding to the second reference signal, and the third reference signal and the second DMRS are used to evaluate the link quality corresponding to the third reference signal.

[0350] The method provided in the embodiment of the present application can determine which DMRS to adopt as a hypothesis and effectively save signaling overhead by determining the DMRS corresponding to the second reference signal group as the DMRS corresponding to each reference signal in the second reference signal group.

[0351] In a further embodiment based on the embodiment shown in FIG8 , the step of determining the DMRS corresponding to the reference signal in the second reference signal group may be replaced by the following sub-steps:

[0352] Step 243: Based on the DMRS used by the control channel, determine the DMRS corresponding to each reference signal in the second reference signal group.

[0353] The DMRS corresponding to each reference signal is used to evaluate the link quality corresponding to each reference signal.

[0354] In some embodiments, the first terminal device receives configuration information of a control channel, where the configuration information of the control channel includes a DMRS used by the control channel. Optionally, the DMRS used by the control channel is the first DMRS or the second DMRS.

[0355] In some embodiments, when the control channel uses a first DMRS, the first DMRS is determined to be the DMRS corresponding to each reference signal in the second reference signal group, and the first DMRS is used as the DMRS hypothesis adopted when evaluating the link quality corresponding to each reference signal in the second reference signal group.

[0356] In some embodiments, when the control channel uses a second DMRS, the second DMRS is determined to be the DMRS corresponding to each reference signal in the second reference signal group, and the second DMRS is used as the DMRS hypothesis adopted when evaluating the link quality corresponding to each reference signal in the second reference signal group.

[0357] In some embodiments, when the control channel does not use the first DMRS, a second DMRS is determined to be the DMRS corresponding to each reference signal in the second reference signal group, and the second DMRS is used as the DMRS hypothesis adopted when evaluating the link quality corresponding to each reference signal in the second reference signal group.

[0358] In some embodiments, when the control channel does not use the second DMRS, the first DMRS is determined to be the DMRS corresponding to each reference signal in the second reference signal group, and the first DMRS is used as the DMRS hypothesis adopted when evaluating the link quality corresponding to each reference signal in the second reference signal group.

[0359] The first DMRS may be a first type DMRS or a second type DMRS, and the second DMRS may be a second type DMRS. The first type DMRS is a DMRS that uses one or more of the same resource elements as the control information, and the second type DMRS is a DMRS that uses different resource elements from the control information.

[0360] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0361] The method provided in the embodiment of the present application determines the DMRS corresponding to each reference signal in the second reference signal group based on the DMRS used by the control channel, and does not require additional first indication information to indicate the DMRS, thereby effectively saving signaling overhead.

[0362] In some embodiments, in a further embodiment based on the embodiment shown in FIG. 8 , the step of determining the DMRS corresponding to the reference signal in the second reference signal group may be replaced by the following sub-steps:

[0363] Step 244: Determine the target DMRS as the DMRS corresponding to each reference signal in the second reference signal group.

[0364] The DMRS corresponding to each reference signal is used to evaluate the link quality corresponding to each reference signal.

[0365] The target DMRS is the first DMRS or the second DMRS, in which case the first DMRS is a first-type DMRS or a second-type DMRS, and the second DMRS is a second-type DMRS. The first-type DMRS is a DMRS that uses one or more of the same resource elements as the control information, and the second-type DMRS is a DMRS that uses different resource elements than the control information.

[0366] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0367] The target DMRS is a default DMRS, or in other words, the target DMRS corresponds to a default DMRS type.

[0368] In some embodiments, the first DMRS is determined to be the DMRS corresponding to each reference signal in the second reference signal group, and the first DMRS is used as the DMRS hypothesis adopted when evaluating the link quality corresponding to each reference signal in the second reference signal group.

[0369] In some embodiments, the second DMRS is determined to be the DMRS corresponding to each reference signal in the second reference signal group, and the second DMRS is used as the DMRS hypothesis adopted when evaluating the link quality corresponding to each reference signal in the second reference signal group.

[0370] The method provided in the embodiment of the present application can determine which DMRS to adopt as a hypothesis without requiring other indication information by determining the target DMRS as the DMRS corresponding to each reference signal in the second reference signal group, thereby effectively saving signaling overhead.

[0371] In some embodiments, the first indication information does not indicate a reference signal in the second reference signal group. The reference signals in the second reference signal group are determined based on configuration information of a control channel.

[0372] Optionally, the reference signals in the second reference signal group are determined based on the TCI state corresponding to the target CORESET in the control channel. When one TCI state corresponds to at least two reference signals, the reference signals in the first reference signal group are determined based on the reference signal corresponding to QCL type D.

[0373] In a further embodiment based on the embodiment shown in FIG8 , the step of determining the DMRS corresponding to the reference signal in the second reference signal group may be replaced by the following sub-steps:

[0374] Step 245: When the first reference signal in the second reference signal group is determined based on the TCI state corresponding to the target CORESET in the control channel, determine that the DMRS corresponding to the target CORESET is the DMRS corresponding to the first reference signal in the second reference signal group.

[0375] The DMRS corresponding to the first reference signal is used to evaluate the link quality corresponding to the first reference signal.

[0376] In some embodiments, the DMRS corresponding to the target CORESET may also be understood as the DMRS used by the PDCCH transmitted in the target CORESET. The DMRS corresponding to the target CORESET may be the first DMRS or the second DMRS.

[0377] The first DMRS may be a first type DMRS or a second type DMRS, and the second DMRS may be a second type DMRS. The first type DMRS is a DMRS that uses one or more of the same resource elements as the control information, and the second type DMRS is a DMRS that uses different resource elements from the control information.

[0378] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0379] The target CORESET is a CORESET used to determine a first reference signal, where the first reference signal is determined based on a TCI state corresponding to the target CORESET in a control channel.

[0380] In some embodiments, when the DMRS corresponding to the target CORESET is a first DMRS, the DMRS corresponding to the first reference signal in the second reference signal group is determined to be the first DMRS. The first DMRS is then used as the DMRS hypothesis adopted when evaluating the link quality corresponding to the first reference signal. For example, in this case, the first DMRS is a first type DMRS.

[0381] In some embodiments, when the DMRS corresponding to the target CORESET is a second DMRS, the DMRS corresponding to the first reference signal in the second reference signal group is determined to be the second DMRS. The second DMRS is then used as the DMRS hypothesis adopted when evaluating the link quality corresponding to the first reference signal. For example, in this case, the second DMRS is a second type DMRS.

[0382] The method provided in the embodiments of the present application determines the DMRS corresponding to each reference signal in the second reference signal group by referring to the DMRS corresponding to the target CORESET. This allows for more accurate determination of which DMRS to use as an assumption in response to the actual transmission process. Furthermore, no additional first indication information is required to indicate the DMRS, effectively saving signaling overhead.

[0383] In a further embodiment based on the embodiment shown in FIG8 , the step of determining the DMRS corresponding to the reference signal in the second reference signal group may be replaced by the following sub-steps:

[0384] Step 246: Determine the DMRS corresponding to each reference signal in the second reference signal group based on the DMRSs corresponding to the multiple CORESETs corresponding to the reference signals in the second reference signal group.

[0385] The DMRS corresponding to each reference signal is used to evaluate the link quality corresponding to each reference signal.

[0386] In some embodiments, when one or more of the multiple CORESETs corresponding to the reference signals in the second reference signal group correspond to a first DMRS, the first DMRS is determined to be the DMRS corresponding to each reference signal in the second reference signal group. The first DMRS is then used as the DMRS hypothesis adopted when evaluating the link quality corresponding to each reference signal in the second reference signal group. For example, in this case, the first DMRS is a first-type DMRS.

[0387] In some embodiments, when one or more of the multiple CORESETs corresponding to the reference signals in the second reference signal group correspond to a second DMRS, the second DMRS is determined to be the DMRS corresponding to each reference signal in the second reference signal group. The second DMRS is then used as the DMRS hypothesis adopted when evaluating the link quality corresponding to each reference signal in the second reference signal group. For example, in this case, the second DMRS is a second-type DMRS.

[0388] In some embodiments, when all of the multiple CORESETs corresponding to the reference signals in the second reference signal group use the first DMRS, the first DMRS is determined to be the DMRS corresponding to each reference signal in the second reference signal group. The first DMRS is then used as the DMRS hypothesis adopted when evaluating the link quality corresponding to each reference signal in the second reference signal group. For example, in this case, the first DMRS is a first-type DMRS.

[0389] In some embodiments, when all of the multiple CORESETs corresponding to the reference signals in the second reference signal group use the second DMRS, the second DMRS is determined to be the DMRS corresponding to each reference signal in the second reference signal group. The second DMRS is then used as the DMRS hypothesis adopted when evaluating the link quality corresponding to each reference signal in the second reference signal group. For example, in this case, the second DMRS is a second-type DMRS.

[0390] The first DMRS may be a first type DMRS or a second type DMRS, and the second DMRS may be a second type DMRS. The first type DMRS is a DMRS that uses one or more of the same resource elements as the control information, and the second type DMRS is a DMRS that uses different resource elements from the control information.

[0391] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0392] The method provided in the embodiments of the present application determines the DMRS corresponding to each reference signal in the second reference signal group based on the DMRSs corresponding to multiple CORESETs corresponding to the reference signals in the second reference signal group. This method can effectively reduce signaling overhead while determining which DMRS to use as a hypothesis. Furthermore, in scenarios where multiple CORESETs exist, the DMRS corresponding to each reference signal can be more reasonably determined.

[0393] In some embodiments, in a further embodiment based on the embodiment shown in FIG. 8 , the step of determining the DMRS corresponding to the reference signal in the second reference signal group may be replaced by the following sub-steps:

[0394] Step 247: Determine the target DMRS as the DMRS corresponding to each reference signal in the second reference signal group.

[0395] The DMRS corresponding to each reference signal is used to evaluate the link quality corresponding to each reference signal.

[0396] The target DMRS is the first DMRS or the second DMRS, in which case the first DMRS is a first-type DMRS or a second-type DMRS, and the second DMRS is a second-type DMRS. The first-type DMRS is a DMRS that uses one or more of the same resource elements as the control information, and the second-type DMRS is a DMRS that uses different resource elements than the control information.

[0397] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0398] The target DMRS is a default DMRS, or in other words, the target DMRS corresponds to a default DMRS type.

[0399] In some embodiments, the first DMRS is determined to be the DMRS corresponding to each reference signal in the second reference signal group, and the first DMRS is used as the DMRS hypothesis adopted when evaluating the link quality corresponding to each reference signal in the second reference signal group.

[0400] In some embodiments, the second DMRS is determined to be the DMRS corresponding to each reference signal in the second reference signal group, and the second DMRS is used as the DMRS hypothesis adopted when evaluating the link quality corresponding to each reference signal in the second reference signal group.

[0401] The method provided in the embodiment of the present application can determine which DMRS to adopt as a hypothesis without requiring other indication information by determining the target DMRS as the DMRS corresponding to each reference signal in the second reference signal group, thereby effectively saving signaling overhead.

[0402] In some embodiments, the reference signals in the second reference signal group are determined based on a TCI state corresponding to a target search space in the control channel.

[0403] In the case where one TCI state corresponds to at least two reference signals, the reference signals in the first reference signal group are determined based on the reference signal corresponding to QCL type D.

[0404] In a further embodiment based on the embodiment shown in FIG8 , the step of determining the DMRS corresponding to the reference signal in the second reference signal group may be replaced by the following sub-steps:

[0405] Step 248: When the second reference signal in the second reference signal group is determined based on the TCI state corresponding to the target search space in the control channel, determine that the DMRS corresponding to the target search space is the DMRS corresponding to the second reference signal in the second reference signal group.

[0406] The DMRS corresponding to the second reference signal is used to evaluate the link quality corresponding to the second reference signal.

[0407] In some embodiments, the DMRS corresponding to the target search space can also be understood as the DMRS used by the PDCCH transmitted in the target search space. The DMRS corresponding to the target search space is a first DMRS or a second DMRS. The DMRS corresponding to the target search space is a first-type DMRS or a second-type DMRS. The first DMRS is a DMRS that uses one or more of the same resource elements as the control information, and the second DMRS is a DMRS that uses different resource elements than the control information. The first DMRS can be a first-type DMRS or a second-type DMRS, and the second DMRS can be a second-type DMRS.

[0408] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0409] The second reference signal is determined based on a TCI state corresponding to a target search space in the control channel.

[0410] In some embodiments, when the DMRS corresponding to the target search space is a first DMRS, the DMRS corresponding to the second reference signal in the second reference signal group is determined to be the first DMRS. The first DMRS is then used as the DMRS hypothesis adopted when evaluating the link quality corresponding to the second reference signal. For example, in this case, the first DMRS is a first type DMRS.

[0411] In some embodiments, when the DMRS corresponding to the target search space is a second DMRS, the DMRS corresponding to the second reference signal in the second reference signal group is determined to be the second DMRS. The second DMRS is then used as the DMRS hypothesis adopted when evaluating the link quality corresponding to the second reference signal. For example, in this case, the second DMRS is a second type DMRS.

[0412] The method provided in the embodiments of the present application determines the DMRS corresponding to each reference signal in the second reference signal group by referring to the DMRS corresponding to the target search space. This allows for more accurate determination of the DMRS to be used as an assumption in accordance with the actual transmission process. Furthermore, no additional first indication information is required to indicate the DMRS, effectively saving signaling overhead.

[0413] In a further embodiment based on the embodiment shown in FIG8 , the step of determining the DMRS corresponding to the reference signal in the second reference signal group may be replaced by the following sub-steps:

[0414] Step 249: Determine the DMRS corresponding to each reference signal in the second reference signal group based on the DMRSs corresponding to multiple search spaces corresponding to the reference signals in the second reference signal group.

[0415] The DMRS corresponding to each reference signal is used to evaluate the link quality corresponding to each reference signal.

[0416] In some embodiments, when one or more search spaces among the multiple search spaces corresponding to the reference signals in the second reference signal group correspond to a first DMRS, the first DMRS is determined to be the DMRS corresponding to each reference signal in the second reference signal group. The first DMRS is then used as a DMRS hypothesis for evaluating the link quality corresponding to each reference signal in the second reference signal group. For example, in this case, the first DMRS is a first-type DMRS.

[0417] In some embodiments, when one or more search spaces among the multiple search spaces corresponding to the reference signals in the second reference signal group correspond to a second DMRS, the second DMRS is determined to be the DMRS corresponding to each reference signal in the second reference signal group. The second DMRS is then used as the DMRS hypothesis adopted when evaluating the link quality corresponding to each reference signal in the second reference signal group. For example, in this case, the second DMRS is a second-type DMRS.

[0418] In some embodiments, when all of the multiple search spaces corresponding to the reference signals in the second reference signal group use the first DMRS, the first DMRS is determined to be the DMRS corresponding to each reference signal in the second reference signal group. The first DMRS is then used as the DMRS hypothesis adopted when evaluating the link quality corresponding to each reference signal in the second reference signal group. For example, in this case, the first DMRS is a first-type DMRS.

[0419] In some embodiments, when all of the multiple search spaces corresponding to the reference signals in the second reference signal group use the second DMRS, the second DMRS is determined to be the DMRS corresponding to each reference signal in the second reference signal group. The second DMRS is then used as the DMRS hypothesis adopted when evaluating the link quality corresponding to each reference signal in the second reference signal group. For example, in this case, the second DMRS is a second-type DMRS.

[0420] The first DMRS may be a first type DMRS or a second type DMRS, and the second DMRS may be a second type DMRS. The first DMRS is a DMRS that uses one or more of the same resource elements as the control information, and the second DMRS is a DMRS that uses different resource elements than the control information.

[0421] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0422] The method provided in the embodiments of the present application determines the DMRS corresponding to each reference signal in the second reference signal group based on the DMRSs corresponding to multiple search spaces corresponding to the reference signals in the second reference signal group. This method can effectively reduce signaling overhead while determining which DMRS to use as a hypothesis. Furthermore, in scenarios where multiple search spaces exist, the DMRS corresponding to each reference signal can be more reasonably determined.

[0423] In some embodiments, in a further embodiment based on the embodiment shown in FIG. 8 , the step of determining the DMRS corresponding to the reference signal in the second reference signal group may be replaced by the following sub-steps:

[0424] Step 250: Determine the target DMRS as the DMRS corresponding to each reference signal in the second reference signal group.

[0425] The DMRS corresponding to each reference signal is used to evaluate the link quality corresponding to each reference signal.

[0426] The target DMRS is the first DMRS or the second DMRS, in which case the first DMRS is a first-type DMRS or a second-type DMRS, and the second DMRS is a second-type DMRS. The first-type DMRS is a DMRS that uses one or more of the same resource elements as the control information, and the second-type DMRS is a DMRS that uses different resource elements than the control information.

[0427] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0428] The target DMRS is a default DMRS, or in other words, the target DMRS corresponds to a default DMRS type.

[0429] In some embodiments, the first DMRS is determined to be the DMRS corresponding to each reference signal in the second reference signal group, and the first DMRS is used as the DMRS hypothesis adopted when evaluating the link quality corresponding to each reference signal in the second reference signal group.

[0430] In some embodiments, the second DMRS is determined to be the DMRS corresponding to each reference signal in the second reference signal group, and the second DMRS is used as the DMRS hypothesis adopted when evaluating the link quality corresponding to each reference signal in the second reference signal group.

[0431] The method provided in the embodiment of the present application can determine which DMRS to adopt as a hypothesis without requiring other indication information by determining the target DMRS as the DMRS corresponding to each reference signal in the second reference signal group, thereby effectively saving signaling overhead.

[0432] It is worth noting that any of the above steps 241 to 250 can be implemented as a separate embodiment.

[0433] In addition, the above steps 221 and 241 may be combined and implemented as a new embodiment. The above steps 221 and 242 may be combined and implemented as a new embodiment. The above steps 221 and 243 may be combined and implemented as a new embodiment. The above steps 221 and 244 may be combined and implemented as a new embodiment. The above steps 221 and 245 may be combined and implemented as a new embodiment. The above steps 221 and 246 may be combined and implemented as a new embodiment. The above steps 221 and 247 may be combined and implemented as a new embodiment. The above steps 221 and 248 may be combined and implemented as a new embodiment. The above steps 221 and 249 may be combined and implemented as a new embodiment. The above steps 221 and 250 may be combined and implemented as a new embodiment.

[0434] Step 222 and step 241 may be combined and implemented as a new embodiment. Step 222 and step 242 may be combined and implemented as a new embodiment. Step 222 and step 243 may be combined and implemented as a new embodiment. Step 222 and step 244 may be combined and implemented as a new embodiment. Step 222 and step 245 may be combined and implemented as a new embodiment. Step 222 and step 246 may be combined and implemented as a new embodiment. Step 222 and step 247 may be combined and implemented as a new embodiment. Step 222 and step 248 may be combined and implemented as a new embodiment. Step 222 and step 249 may be combined and implemented as a new embodiment. Step 222 and step 250 may be combined and implemented as a new embodiment.

[0435] The above steps 223 and 241 may be combined and implemented as a new embodiment. The above steps 223 and 242 may be combined and implemented as a new embodiment. The above steps 223 and 243 may be combined and implemented as a new embodiment. The above steps 223 and 244 may be combined and implemented as a new embodiment. The above steps 223 and 245 may be combined and implemented as a new embodiment. The above steps 223 and 246 may be combined and implemented as a new embodiment. The above steps 223 and 247 may be combined and implemented as a new embodiment. The above steps 223 and 248 may be combined and implemented as a new embodiment. The above steps 223 and 249 may be combined and implemented as a new embodiment. The above steps 223 and 250 may be combined and implemented as a new embodiment.

[0436] The above steps 224 and 241 may be combined and implemented as a new embodiment. The above steps 224 and 242 may be combined and implemented as a new embodiment. The above steps 224 and 243 may be combined and implemented as a new embodiment. The above steps 224 and 244 may be combined and implemented as a new embodiment. The above steps 224 and 245 may be combined and implemented as a new embodiment. The above steps 224 and 246 may be combined and implemented as a new embodiment. The above steps 224 and 247 may be combined and implemented as a new embodiment. The above steps 224 and 248 may be combined and implemented as a new embodiment. The above steps 224 and 249 may be combined and implemented as a new embodiment. The above steps 224 and 250 may be combined and implemented as a new embodiment.

[0437] Step 225 and step 241 may be combined and implemented as a new embodiment. Step 225 and step 242 may be combined and implemented as a new embodiment. Step 225 and step 243 may be combined and implemented as a new embodiment. Step 225 and step 244 may be combined and implemented as a new embodiment. Step 225 and step 245 may be combined and implemented as a new embodiment. Step 225 and step 246 may be combined and implemented as a new embodiment. Step 225 and step 247 may be combined and implemented as a new embodiment. Step 225 and step 248 may be combined and implemented as a new embodiment. Step 225 and step 249 may be combined and implemented as a new embodiment. Step 225 and step 250 may be combined and implemented as a new embodiment.

[0438] Step 226 and step 241 may be combined and implemented as a new embodiment. Step 226 and step 242 may be combined and implemented as a new embodiment. Step 226 and step 243 may be combined and implemented as a new embodiment. Step 226 and step 244 may be combined and implemented as a new embodiment. Step 226 and step 245 may be combined and implemented as a new embodiment. Step 226 and step 246 may be combined and implemented as a new embodiment. Step 226 and step 247 may be combined and implemented as a new embodiment. Step 226 and step 248 may be combined and implemented as a new embodiment. Step 226 and step 249 may be combined and implemented as a new embodiment. Step 226 and step 250 may be combined and implemented as a new embodiment.

[0439] Step 227 and step 241 may be combined and implemented as a new embodiment. Step 227 and step 242 may be combined and implemented as a new embodiment. Step 227 and step 243 may be combined and implemented as a new embodiment. Step 227 and step 244 may be combined and implemented as a new embodiment. Step 227 and step 245 may be combined and implemented as a new embodiment. Step 227 and step 246 may be combined and implemented as a new embodiment. Step 227 and step 247 may be combined and implemented as a new embodiment. Step 227 and step 248 may be combined and implemented as a new embodiment. Step 227 and step 249 may be combined and implemented as a new embodiment. Step 227 and step 250 may be combined and implemented as a new embodiment.

[0440] Step 228 and step 241 may be combined and implemented as a new embodiment. Step 228 and step 242 may be combined and implemented as a new embodiment. Step 228 and step 243 may be combined and implemented as a new embodiment. Step 228 and step 244 may be combined and implemented as a new embodiment. Step 228 and step 245 may be combined and implemented as a new embodiment. Step 228 and step 246 may be combined and implemented as a new embodiment. Step 228 and step 247 may be combined and implemented as a new embodiment. Step 228 and step 248 may be combined and implemented as a new embodiment. Step 228 and step 249 may be combined and implemented as a new embodiment. Step 228 and step 250 may be combined and implemented as a new embodiment.

[0441] FIG10 shows a flow chart of a method for determining a DMRS provided by an exemplary embodiment of the present application. In a further embodiment based on the embodiment shown in FIG8 , before steps 220 and 240, the method further includes:

[0442] Step 260: Report terminal capabilities.

[0443] Optionally, the first terminal capability is reported. The first terminal capability is used to indicate that the first terminal device supports the use of a first type of DMRS. The first type of DMRS is a DMRS that uses one or more of the same resource elements as the control information. In the embodiment of the present application, the term "report" can be understood as sending.

[0444] In some embodiments, the first terminal capability is transmitted via RRC signaling, or the first terminal capability is transmitted via MAC CE signaling.

[0445] In some embodiments, the first terminal capability is reported according to one or more of the following options:

[0446] First frequency band;

[0447] The first frequency band combination;

[0448] Each frequency band in the first frequency band combination;

[0449] Each carrier on each frequency band in the first frequency band combination;

[0450] The first target frequency band range;

[0451] The first target terminal device.

[0452] Optionally, the first terminal capability is reported for a frequency band. That is, the terminal capability corresponding to the current frequency band can be independently reported for different frequency bands, which is conducive to improving the degree of freedom of the terminal device.

[0453] Optionally, the first terminal capability is reported for a band combination. That is, the terminal capability corresponding to the current band combination can be independently reported for different band combinations. This is conducive to improving the degree of freedom of the terminal device.

[0454] Optionally, the first terminal capability is reported independently for each frequency band in a band combination. That is, the terminal capability corresponding to the current frequency band can be reported independently for different frequency bands in different band combinations. This is conducive to improving the degree of freedom of the terminal device.

[0455] Optionally, the first terminal capability is reported independently for each carrier on each frequency band in a band combination. That is, the terminal capability corresponding to the current carrier can be independently reported for different carriers in different frequency bands in different band combinations. This helps to increase the degree of freedom of the terminal device.

[0456] Optionally, the first terminal capability is reported for a frequency range. That is, the terminal capability corresponding to the current frequency range can be independently reported for different frequency ranges. This is conducive to improving the degree of freedom of the terminal device.

[0457] Optionally, the first terminal capability is reported for a terminal device. That is, different terminal devices can independently report the terminal capabilities corresponding to the terminal devices themselves. This can effectively reduce the signaling overhead of the terminal devices reporting the terminal capabilities.

[0458] In some embodiments, the first terminal capability is further used to indicate one or more of the following options:

[0459] Supported power parameters;

[0460] Mode that supports the first type of DMRS;

[0461] Supporting frequency domain density of the first type of DMRS;

[0462] Supporting time domain density of the first type of DMRS.

[0463] Optionally, a second terminal capability is reported. The second terminal capability is used to indicate support for determining DMRSs corresponding to reference signals in a reference signal group, where the reference signal group includes the first reference signal group and / or the second reference signal group.

[0464] Optionally, the second terminal capability is used to indicate support for determining the DMRS corresponding to the reference signal in the first reference signal group. The reference signal in the first reference signal group and the DMRS corresponding to the reference signal are used to evaluate the first link quality. The first link quality is used to indicate whether a target event occurs, such as whether a beam failure occurs. The DMRS corresponding to the reference signal in the first reference signal group is a first DMRS or a second DMRS. The DMRS corresponding to the reference signal in the first reference signal group is a first type DMRS or a second type DMRS, the first type DMRS is a DMRS that uses one or more of the same resource elements as the control information, and the second type DMRS is a DMRS that uses different resource elements from the control information.

[0465] Optionally, the second terminal capability is used to indicate support for determining the DMRS corresponding to the reference signal in the second reference signal group. The reference signal in the second reference signal group and the DMRS corresponding to the reference signal are used to evaluate the second link quality. The second link quality is used to indicate whether a target event occurs, such as whether a beam failure occurs. The DMRS corresponding to the reference signal in the second reference signal group is a first DMRS or a second DMRS. The DMRS corresponding to the reference signal in the second reference signal group is a first type DMRS or a second type DMRS, the first type DMRS is a DMRS that uses one or more of the same resource elements as the control information, and the second type DMRS is a DMRS that uses different resource elements from the control information.

[0466] In some embodiments, the first DMRS may be a first type DMRS or a second type DMRS, and the second DMRS may be a second type DMRS. Optionally, the second terminal capability is used to indicate support for determining the DMRS corresponding to the reference signals in the first reference signal group and the DMRS corresponding to the reference signals in the second reference signal group.

[0467] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0468] In some embodiments, the second terminal capability is transmitted via RRC signaling, or the second terminal capability is transmitted via MAC CE signaling.

[0469] In some embodiments, the second terminal capability is reported according to one or more of the following options:

[0470] Second frequency band;

[0471] Second frequency band combination;

[0472] Each frequency band in the second frequency band combination;

[0473] Each carrier on each band in the second band combination;

[0474] Second target frequency band range;

[0475] Second target terminal device.

[0476] Optionally, the second terminal capability is reported for each frequency band. That is, the terminal capability corresponding to the current frequency band can be independently reported for different frequency bands. This is conducive to improving the freedom of terminal devices.

[0477] Optionally, the second terminal capability is reported for a frequency band combination. That is, the terminal capability corresponding to the current frequency band combination can be independently reported for different frequency band combinations. This is conducive to improving the degree of freedom of the terminal device.

[0478] Optionally, the second terminal capability is reported independently for each frequency band in the frequency band combination. That is, the terminal capability corresponding to the current frequency band can be independently reported for different frequency bands in different frequency band combinations. This is conducive to improving the degree of freedom of the terminal device.

[0479] Optionally, the second terminal capability is reported independently for each carrier on each frequency band in the frequency band combination. That is, the terminal capability corresponding to the current carrier can be independently reported for different carriers in different frequency bands in different frequency band combinations. This helps to increase the degree of freedom of the terminal device.

[0480] Optionally, the second terminal capability is reported for a frequency band range. That is, the terminal capability corresponding to the current frequency band range can be independently reported for different frequency band ranges. This is conducive to improving the degree of freedom of the terminal device.

[0481] Optionally, the second terminal capability is reported for a terminal device. That is, different terminal devices can independently report the terminal capability corresponding to the terminal device itself. This can effectively reduce the signaling overhead of the terminal device reporting the terminal capability.

[0482] Optionally, the first terminal capability and the second terminal capability can be reported together; optionally, the first terminal capability and the second terminal capability can be reported using the same options, for example, the first frequency band corresponding to the first terminal capability and the second frequency band corresponding to the second terminal capability are the same frequency band.

[0483] FIG11 shows a flow chart of a method for determining a DMRS provided by an exemplary embodiment of the present application. The method is executed by a second terminal device or a network device, and the method includes:

[0484] Step 20: Send the first indication information.

[0485] In some embodiments, the first indication information is used to indicate a DMRS corresponding to a reference signal in a first reference signal group. The reference signals in the first reference signal group and the DMRS corresponding to the reference signals in the first reference signal group are used to evaluate the first link quality. The DMRS corresponding to the reference signals in the first reference signal group is a first DMRS or a second DMRS. The first DMRS may be a first-type DMRS or a second-type DMRS, and the second DMRS may be a second-type DMRS.

[0486] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0487] In some embodiments, the reference signals in the first reference signal group and the DMRS corresponding to the reference signals in the first reference signal group are used to evaluate the first link quality. Alternatively, it can be understood that the first link quality is evaluated in combination with the reference signals in the first reference signal group and the DMRS corresponding to the reference signals in the first reference signal group. The reference signals in the first reference signal group are used to evaluate the first link quality, and the DMRS corresponding to the reference signals are also used to evaluate the first link quality.

[0488] In some embodiments, the first link quality is the link quality corresponding to the reference signals in the first reference signal group. Alternatively, it can be understood that the first link quality is the link quality of the beams corresponding to the reference signals in the first reference signal group. For example, the first reference signal group is associated with TRP1, and each reference signal in the first reference signal group is associated with a beam of TRP1.

[0489] The first link quality is used to indicate whether a target event occurs, such as whether a beam failure occurs.

[0490] In some embodiments, the first indication information is used to indicate the DMRS corresponding to each reference signal in the first reference signal group, wherein the DMRS corresponding to each reference signal in the first reference signal group is the first DMRS or the second DMRS, and the DMRSs corresponding to different reference signals are the same or different.

[0491] In some embodiments, the first indication information is used to indicate a DMRS corresponding to the first reference signal group, wherein the DMRS corresponding to the first reference signal group is the first DMRS or the second DMRS.

[0492] In some embodiments, the first indication information is further used to indicate a DMRS corresponding to a reference signal in a second reference signal group. The reference signals in the second reference signal group and the DMRS corresponding to the reference signals in the second reference signal group are used to evaluate the second link quality, and the DMRS corresponding to the reference signals in the second reference signal group is a first DMRS or a second DMRS. The first DMRS may be a first-type DMRS or a second-type DMRS, and the second DMRS may be a second-type DMRS.

[0493] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0494] In some embodiments, the reference signals in the second reference signal group and the DMRS corresponding to the reference signals in the second reference signal group are used to evaluate the second link quality. Alternatively, it can be understood that the second link quality is evaluated in combination with the reference signals in the second reference signal group and the DMRS corresponding to the reference signals in the second reference signal group. The reference signals in the second reference signal group are used to evaluate the second link quality, and the DMRS corresponding to the reference signals are also used to evaluate the second link quality.

[0495] In some embodiments, the second link quality is the link quality corresponding to the reference signals in the second reference signal group. Alternatively, it can be understood that the second link quality is the link quality of the beams corresponding to the reference signals in the second reference signal group. For example, the second reference signal group is associated with TRP2, and each reference signal in the second reference signal group is associated with a beam of TRP2.

[0496] The second link quality is used to indicate whether a target event occurs, such as whether a beam failure occurs.

[0497] Specifically, the function of the first indication information is detailed in the above steps 221, 222, 241 and 242.

[0498] FIG12 shows a flow chart of a method for determining a DMRS provided by an exemplary embodiment of the present application. The method is executed by a second terminal device or a network device, and the method includes:

[0499] Step 21: Receive terminal capabilities.

[0500] Optionally, receiving a first terminal capability, where the first terminal capability is used to indicate support for use of a first type of DMRS;

[0501] Optionally, a second terminal capability is received, where the second terminal capability is used to indicate support for determining a DMRS corresponding to a reference signal in a reference signal group, where the reference signal group includes a first reference signal group and / or a second reference signal group.

[0502] Specifically, the implementation of the terminal capability is detailed in step 260 above.

[0503] It is worth noting that, usually, the above step 21 is performed before step 20.

[0504] In some embodiments, the first type DMRS is a DMRS that uses at least one of the same resource elements as the control information. The second type DMRS is a DMRS that uses different resource elements than the control information.

[0505] In some embodiments, FIG13 shows a flowchart of a method for determining a DMRS provided by an exemplary embodiment of the present application. The method is jointly performed by a first terminal device, a second terminal device, and / or a network device, and the method further includes:

[0506] Step 1: The first terminal device reports terminal capabilities to the second terminal device and / or the network device;

[0507] Specifically, the implementation method of the terminal capability refers to the above step 210.

[0508] Step 2: The second terminal device and / or network device sends the first indication information and / or configuration information of the control channel.

[0509] Optionally, the first indication information is used to indicate or configure a reference signal in a reference signal group. Optionally, configuration information of a control channel is used to indicate a reference signal in a reference signal group.

[0510] Step 3: The first terminal device determines the DMRS corresponding to each reference signal in the reference signal group.

[0511] The DMRS corresponding to each reference signal is used to evaluate the link quality corresponding to each reference signal.

[0512] Optionally, the first terminal device determines the DMRS corresponding to each candidate reference signal in the first candidate reference signal group. For specific determination methods, see the above step 220. Optionally, the first terminal device determines the DMRS corresponding to each reference signal in the second reference signal group. For specific determination methods, see the above step 240.

[0513] The first terminal device evaluates link quality based on the reference signals in the reference signal group.

[0514] The above steps do not necessarily include all of them, and may include one or more of them.

[0515] For the discovery and reporting of new beams:

[0516] In some embodiments, the first terminal device evaluates the link quality based on each reference signal in the first reference signal group and / or the second reference signal group and the DMRS corresponding to each reference signal in the first reference signal group and / or the second reference signal group, and then reports the first reporting information to the network based on the link quality. If the target event occurs, for example, when it is determined that a beam failure occurs, the first terminal device needs to report the first reporting information to the network device or the second terminal device. Optionally, the first reporting information may indicate the target reference signal and / or other information related to the target event, such as the target event occurs and the beam failure occurs. Exemplarily, as shown in Figure 9, after the terminal device evaluates the link quality based on the reference signal corresponding to beam 1 of TRP1 and the DMRS corresponding to the reference signal corresponding to beam 1, when it is determined that a beam failure occurs, it is necessary to re-determine the target reference signal that meets the link quality condition, such as determining that the reference signal corresponding to beam 2 of TRP2 is the target reference signal that meets the link quality condition.

[0517] Optionally, the first reporting information is transmitted through a random access channel (RACH), or through MAC CE signaling, or through RRC signaling.

[0518] In some embodiments, the target reference signal is a signal selected from a third reference signal group that meets a link quality condition. The third reference signal group includes one or more candidate reference signals, and the third reference signal group is indicated by second indication information. Optionally, the first terminal device receives the second indication information sent by the network device or the second terminal device. Optionally, the second indication information is sent via one or more of RRC signaling, MAC CE signaling, and DCI signaling.

[0519] Optionally, the first indication information and the second indication information are the same information, or the first indication information and the second indication information are transmitted via the same signaling. This helps save signaling overhead. Optionally, the first indication information and the second indication information are different information, or the first indication information and the second indication information are transmitted via different signaling. This provides greater flexibility by providing indications using different information.

[0520] The link quality conditions may be met in one or more of the following situations:

[0521] The link quality is greater than or equal to the fourth threshold;

[0522] The number of times the link quality exceeds the fifth threshold within the second target time exceeds the second numerical threshold;

[0523] The difference between the link quality and the sixth threshold is greater than the second difference threshold;

[0524] Maximum link quality.

[0525] Optionally, the second indication information can be used to indicate parameters related to the link quality condition, for example, one or more of a fourth threshold, a second target time, a fifth threshold, a second numerical threshold, a sixth threshold, and a second difference threshold.

[0526] In some embodiments, the first terminal device may evaluate the link quality in one or more ways. For example, the first terminal device may evaluate the link quality based on the RSRP of the above-mentioned reference signal, that is, evaluate the third link quality based on the RSRP corresponding to the candidate reference signal in the third reference signal group. Or, the first terminal device may evaluate the link quality based on the SINR of the above-mentioned reference signal, that is, evaluate the third link quality based on the SINR corresponding to the candidate reference signal in the third reference signal group. Or, the first terminal device may evaluate the link quality based on the transmission quality of the control channel, that is, evaluate the third link quality based on the transmission performance of the channel corresponding to the candidate reference signal in the third reference signal group when used to transmit the control channel, for example, evaluate the third link quality based on the hypothetical BLER.

[0527] When the first terminal device evaluates the link quality based on the control channel transmission quality, different DMRSs have different effects on the control channel transmission. Therefore, when there are two DMRSs, it is necessary to determine the DMRS corresponding to the link quality evaluation. It can also be understood that in some embodiments, it is necessary to determine which DMRS hypothesis to use to evaluate the link quality, or which DMRS to use to evaluate the link quality hypothesis, or which DMRS to use as the hypothesis for evaluating the link quality.

[0528] FIG14 shows a flow chart of a method for determining a DMRS provided by an exemplary embodiment of the present application. The method is executed by a first terminal device and includes:

[0529] Step 320: Determine the DMRS corresponding to the candidate reference signals in the third reference signal group.

[0530] In some embodiments, the candidate reference signals in the third reference signal group and the DMRS corresponding to the candidate reference signals in the third reference signal group are used to evaluate the third link quality. Alternatively, it can be understood that the third link quality is evaluated in combination with the candidate reference signals in the third reference signal group and the DMRS corresponding to the candidate reference signals in the third reference signal group. The candidate reference signals in the third reference signal group are used to evaluate the third link quality, and the DMRS corresponding to the candidate reference signals are also used to evaluate the third link quality. That is, the third link quality is evaluated based on the candidate reference signals in the third reference signal group, or based on the candidate reference signals in the third reference signal group and the corresponding DMRS.

[0531] In some embodiments, the third link quality is the link quality corresponding to a candidate reference signal in the third reference signal group. Alternatively, it can be understood that the third link quality is the link quality of the beam corresponding to the candidate reference signal in the third reference signal group. The third link quality is used to select a target reference signal that meets a link quality condition from one or more candidate reference signals.

[0532] In some embodiments, the DMRS corresponding to the candidate reference signal in the third reference signal group is determined to be a first DMRS or a second DMRS. The DMRS corresponding to the candidate reference signal in the third reference signal group is a first-type DMRS or a second-type DMRS. A first-type DMRS is a DMRS that uses one or more of the same resource elements as control information, and a second-type DMRS is a DMRS that uses different resource elements than control information. The first DMRS is either the first-type DMRS or the second-type DMRS, and the second DMRS is the second-type DMRS.

[0533] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0534] In some embodiments, determining that the DMRS corresponding to the candidate reference signal in the third reference signal group is the first DMRS can be understood as adopting the first DMRS corresponding to the candidate reference signal in the third reference signal group as a DMRS hypothesis, or assuming that the first DMRS corresponding to the candidate reference signal in the third reference signal group is adopted to evaluate link quality.

[0535] In some embodiments, determining that the DMRS corresponding to the candidate reference signal in the third reference signal group is the second DMRS can be understood as adopting the second DMRS corresponding to the candidate reference signal in the third reference signal group as a DMRS hypothesis, or assuming that the second DMRS corresponding to the candidate reference signal in the third reference signal group is adopted to evaluate link quality.

[0536] The method provided in this embodiment determines the DMRS corresponding to the candidate reference signal in the third reference signal group, thereby determining which DMRS the first terminal device uses as the DMRS hypothesis. By determining the DMRS used by the hypothetical control channel to evaluate the link quality of the beam, the accuracy of the link quality evaluation is improved when either of the two DMRSs may be used.

[0537] In a further embodiment based on the embodiment shown in FIG. 14 , the step of determining the DMRS corresponding to the candidate reference signals in the third reference signal group may be replaced by the following sub-steps:

[0538] Step 321: Determine that the target DMRS is the DMRS corresponding to the candidate reference signal in the third reference signal group.

[0539] The DMRS corresponding to each candidate reference signal is used to evaluate the link quality corresponding to each candidate reference signal.

[0540] The target DMRS includes a first DMRS or a second DMRS, where the first DMRS is a first-type DMRS or a second-type DMRS, and the second DMRS is a second-type DMRS. The first-type DMRS is a DMRS that uses one or more of the same resource elements as the control information, and the second-type DMRS is a DMRS that uses different resource elements than the control information.

[0541] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0542] The target DMRS is a default DMRS, or in other words, the target DMRS corresponds to a default DMRS type.

[0543] In some embodiments, the first DMRS is determined to be the DMRS corresponding to each candidate reference signal in the third reference signal group, and the first DMRS is used as the DMRS hypothesis adopted when evaluating the link quality corresponding to each candidate reference signal in the third reference signal group.

[0544] In some embodiments, the second DMRS is determined to be the DMRS corresponding to each candidate reference signal in the third reference signal group, and the second DMRS is used as the DMRS hypothesis adopted when evaluating the link quality corresponding to each candidate reference signal in the third reference signal group.

[0545] The method provided in the embodiment of the present application can effectively save signaling overhead while determining which DMRS to adopt as a hypothesis by determining the target DMRS as the DMRS corresponding to each candidate reference signal in the third reference signal group.

[0546] In a further embodiment based on the embodiment shown in FIG. 14 , the step of determining the DMRS corresponding to the candidate reference signals in the third reference signal group may be replaced by the following sub-steps:

[0547] Step 322: When the second indication information indicates that there is a DMRS corresponding to the third reference signal group, determine that the DMRS corresponding to the third reference signal group is the DMRS corresponding to each candidate reference signal in the third reference signal group.

[0548] The DMRS corresponding to each candidate reference signal is used to evaluate the link quality corresponding to each candidate reference signal.

[0549] The DMRS corresponding to the third reference signal group is the first DMRS or the second DMRS, and the DMRS corresponding to the third reference signal group is the first type DMRS or the second type DMRS. The first DMRS can be the first type DMRS or the second type DMRS, and the second DMRS can be the second type DMRS. The first type DMRS is a DMRS that uses one or more of the same resource elements as the control information, and the second type DMRS is a DMRS that uses different resource elements than the control information.

[0550] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0551] The DMRS corresponding to the third reference signal group represents a DMRS configured with the entire group as the granularity, and each reference signal in the third reference signal group corresponds to the same DMRS.

[0552] In some embodiments, when the second indication information indicates that the DMRS corresponding to the third reference signal group is the first DMRS, the DMRS corresponding to the third reference signal group is determined to be the first DMRS corresponding to each candidate reference signal in the third reference signal group. That is, the first DMRS is used to evaluate the link quality corresponding to each candidate reference signal in the third reference signal group.

[0553] In some embodiments, when the second indication information indicates that the DMRS corresponding to the third reference signal group is the second DMRS, the DMRS corresponding to the third reference signal group is determined to be the DMRS corresponding to each candidate reference signal in the third reference signal group as the second DMRS. That is, the second DMRS is used to evaluate the link quality corresponding to each candidate reference signal in the third reference signal group.

[0554] For example, assuming that the third reference signal group includes three candidate reference signals, namely, a first candidate reference signal, a second candidate reference signal, and a third candidate reference signal. If the second indication information indicates that the DMRS corresponding to the third reference signal group is the first DMRS, it is determined that the DMRSs corresponding to the first candidate reference signal, the second candidate reference signal, and the third candidate reference signal are all first DMRSs, and the first candidate reference signal and the first DMRS are used to evaluate the link quality corresponding to the first candidate reference signal, the second candidate reference signal and the first DMRS are used to evaluate the link quality corresponding to the second candidate reference signal, and the third candidate reference signal and the first DMRS are used to evaluate the link quality corresponding to the third candidate reference signal. Alternatively, if the second indication information indicates that the DMRS corresponding to the third reference signal group is the second DMRS, it is determined that the DMRSs corresponding to the first candidate reference signal, the second candidate reference signal, and the third candidate reference signal are all second DMRSs, and the first candidate reference signal and the second DMRS are used to evaluate the link quality corresponding to the first candidate reference signal, the second candidate reference signal and the second DMRS are used to evaluate the link quality corresponding to the second candidate reference signal, and the third candidate reference signal and the second DMRS are used to evaluate the link quality corresponding to the third candidate reference signal.

[0555] The method provided in the embodiment of the present application can effectively save signaling overhead while determining which DMRS to use to evaluate the link quality of the beam by determining the DMRS corresponding to the third reference signal group as the DMRS corresponding to each candidate reference signal in the third reference signal group.

[0556] In a further embodiment based on the embodiment shown in FIG. 14 , the step of determining the DMRS corresponding to the candidate reference signals in the third reference signal group may be replaced by the following sub-steps:

[0557] Step 323: Determine the DMRS corresponding to each candidate reference signal in the third reference signal group indicated by the second indication information.

[0558] The DMRS corresponding to each candidate reference signal is used to evaluate the link quality corresponding to each candidate reference signal.

[0559] In a case where the second indication information indicates a DMRS corresponding to each candidate reference signal in the third reference signal group, the DMRS corresponding to each candidate reference signal in the third reference signal group indicated by the second indication information is determined to be the DMRS corresponding to each candidate reference signal in the third reference signal group when evaluating link quality.

[0560] The DMRS corresponding to each candidate reference signal in the third reference signal group is either a first DMRS or a second DMRS. The DMRS corresponding to each candidate reference signal in the third reference signal group is either a first-type DMRS or a second-type DMRS, and the DMRSs corresponding to different candidate reference signals may be the same or different. A first-type DMRS is a DMRS that uses one or more of the same resource elements as control information, and a second-type DMRS is a DMRS that uses different resource elements than control information. The first DMRS may be either a first-type DMRS or a second-type DMRS, and the second DMRS may be a second-type DMRS.

[0561] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0562] Exemplarily, assuming that the third reference signal group includes three candidate reference signals, namely a first candidate reference signal, a second candidate reference signal, and a third candidate reference signal, when the second indication information indicates that the DMRS corresponding to the first candidate reference signal is the first DMRS, the DMRS corresponding to the second candidate reference signal is the first DMRS, and the DMRS corresponding to the third candidate reference signal is the second DMRS, it is determined that the first candidate reference signal and the first DMRS corresponding to the first candidate reference signal are used to evaluate the link quality corresponding to the first candidate reference signal, the second candidate reference signal and the first DMRS corresponding to the second candidate reference signal are used to evaluate the link quality corresponding to the second candidate reference signal, and the third candidate reference signal and the second DMRS corresponding to the third candidate reference signal are used to evaluate the link quality corresponding to the third candidate reference signal.

[0563] The method provided in the embodiment of the present application determines the DMRS corresponding to each candidate reference signal in the third reference signal group as the DMRS corresponding to each candidate reference signal in the third reference signal group, so that it is possible to flexibly determine which DMRS to use as the hypothesis, thereby enabling more accurate judgment of the link quality.

[0564] It is worth noting that any of the above steps 321 to 323 can be implemented as a separate embodiment.

[0565] The above embodiment is for the discovery and reporting scenario of a new beam for a single TRP. In some embodiments, the discovery and reporting scenario of new beams for two TRPs also includes the following embodiments:

[0566] In some embodiments, for the case of two reference signal groups: the third reference signal group corresponds to one or more candidate reference signals, and the fourth reference signal group corresponds to one or more candidate reference signals. At this time, it is assumed that the second indication information indicates which DMRS (first DMRS or second DMRS) is used for the candidate reference signal corresponding to the third reference signal group and which DMRS (first DMRS or second DMRS) is used for the candidate reference signal corresponding to the fourth reference signal group. When the first terminal device evaluates the link quality based on the third reference signal group, it is assumed that the DMRS corresponding to the reference signal in the third reference signal group is adopted; when the first terminal device evaluates the link quality based on the fourth reference signal group, it is assumed that the DMRS corresponding to the reference signal in the fourth reference signal group is adopted. Specifically, as described in the following embodiments:

[0567] FIG15 shows a flow chart of a method for determining a DMRS provided by an exemplary embodiment of the present application. The method is executed by a first terminal device and includes:

[0568] Step 340: Determine the DMRS corresponding to the candidate reference signals in the third reference signal group and the DMRS corresponding to the candidate reference signals in the fourth reference signal group.

[0569] In some embodiments, the fourth link quality is evaluated based on the candidate reference signals in the fourth reference signal group, for example, based on RSRP, SINR, or hypothetical BLER corresponding to the candidate reference signals in the fourth reference signal group.

[0570] In some embodiments, the candidate reference signals in the fourth reference signal group and the DMRS corresponding to the candidate reference signals in the fourth reference signal group are used to evaluate the fourth link quality. Alternatively, it can be understood that the fourth link quality is evaluated in combination with the candidate reference signals in the fourth reference signal group and the DMRS corresponding to the candidate reference signals in the fourth reference signal group. The candidate reference signals in the fourth reference signal group are used to evaluate the fourth link quality, and the DMRS corresponding to the candidate reference signals are also used to evaluate the fourth link quality. That is, the fourth link quality is evaluated based on the candidate reference signals in the fourth reference signal group, or based on the candidate reference signals in the fourth reference signal group and the corresponding DMRS.

[0571] In some embodiments, the fourth link quality is the link quality corresponding to a candidate reference signal in the fourth reference signal group. Alternatively, it can be understood that the fourth link quality is the link quality of the beam corresponding to the candidate reference signal in the fourth reference signal group. The fourth link quality is used to select a target reference signal that meets a link quality condition from one or more candidate reference signals.

[0572] In some embodiments, the DMRS corresponding to the candidate reference signal in the fourth reference signal group is determined to be a first DMRS or a second DMRS. The DMRS corresponding to the candidate reference signal in the fourth reference signal group is a first-type DMRS or a second-type DMRS. A first-type DMRS is a DMRS that uses one or more of the same resource elements as control information, and a second-type DMRS is a DMRS that uses different resource elements than control information. The first DMRS is either the first-type DMRS or the second-type DMRS, and the second DMRS is the second-type DMRS.

[0573] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0574] In some embodiments, determining that the DMRS corresponding to the candidate reference signal in the fourth reference signal group is the first DMRS can be understood as adopting the first DMRS corresponding to the candidate reference signal in the fourth reference signal group as a DMRS hypothesis, or assuming that the first DMRS corresponding to the candidate reference signal in the fourth reference signal group is adopted to evaluate link quality.

[0575] In some embodiments, determining that the DMRS corresponding to the candidate reference signal in the fourth reference signal group is the second DMRS can be understood as adopting the second DMRS corresponding to the candidate reference signal in the fourth reference signal group as a DMRS hypothesis, or assuming that the second DMRS corresponding to the candidate reference signal in the fourth reference signal group is adopted to evaluate link quality.

[0576] The method provided in this embodiment determines the DMRS corresponding to the candidate reference signal in the fourth reference signal group, thereby determining which DMRS the first terminal device uses as the DMRS hypothesis. By determining the DMRS used by the hypothetical control channel to evaluate the link quality of the beam, the accuracy of the link quality evaluation is improved when either of the two DMRSs may be used.

[0577] In a further embodiment based on the embodiment shown in FIG. 15 , the step of determining the DMRS corresponding to the candidate reference signals in the third reference signal group may be replaced by the following sub-steps:

[0578] Step 341: Determine that the target DMRS is the DMRS corresponding to the candidate reference signal in the fourth reference signal group.

[0579] The DMRS corresponding to each candidate reference signal is used to evaluate the link quality corresponding to each candidate reference signal.

[0580] The target DMRS includes a first DMRS or a second DMRS, where the first DMRS is a first-type DMRS or a second-type DMRS, and the second DMRS is a second-type DMRS. The first-type DMRS is a DMRS that uses one or more of the same resource elements as the control information, and the second-type DMRS is a DMRS that uses different resource elements than the control information.

[0581] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0582] The target DMRS is a default DMRS, or in other words, the target DMRS corresponds to a default DMRS type.

[0583] In some embodiments, the first DMRS is determined to be the DMRS corresponding to each candidate reference signal in the fourth reference signal group, and the first DMRS is used as the DMRS hypothesis adopted when evaluating the link quality corresponding to each candidate reference signal in the fourth reference signal group.

[0584] In some embodiments, the second DMRS is determined to be the DMRS corresponding to each candidate reference signal in the fourth reference signal group, and the second DMRS is used as the DMRS hypothesis adopted when evaluating the link quality corresponding to each candidate reference signal in the fourth reference signal group.

[0585] The method provided in the embodiment of the present application can effectively save signaling overhead while determining which DMRS to adopt as a hypothesis by determining the target DMRS as the DMRS corresponding to each candidate reference signal in the fourth reference signal group.

[0586] In a further embodiment based on the embodiment shown in FIG. 15 , the step of determining the DMRS corresponding to the candidate reference signals in the fourth reference signal group may be replaced by the following sub-steps:

[0587] Step 342: When the second indication information indicates that there is a DMRS corresponding to the fourth reference signal group, determine that the DMRS corresponding to the fourth reference signal group is the DMRS corresponding to each candidate reference signal in the fourth reference signal group.

[0588] The DMRS corresponding to each candidate reference signal is used to evaluate the link quality corresponding to each candidate reference signal.

[0589] The DMRS corresponding to the fourth reference signal group is the first DMRS or the second DMRS, and the DMRS corresponding to the fourth reference signal group is the first type DMRS or the second type DMRS. The first DMRS may be the first type DMRS or the second type DMRS, and the second DMRS may be the second type DMRS. The first type DMRS is a DMRS that uses one or more of the same resource elements as the control information, and the second type DMRS is a DMRS that uses different resource elements than the control information.

[0590] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0591] The DMRS corresponding to the fourth reference signal group represents a DMRS configured with the entire group as the granularity, and each reference signal in the fourth reference signal group corresponds to the same DMRS.

[0592] In some embodiments, when the second indication information indicates that the DMRS corresponding to the fourth reference signal group is the first DMRS, the DMRS corresponding to the fourth reference signal group is determined to be the first DMRS corresponding to each candidate reference signal in the fourth reference signal group. That is, the first DMRS is used to evaluate the link quality corresponding to each candidate reference signal in the fourth reference signal group.

[0593] In some embodiments, when the second indication information indicates that the DMRS corresponding to the fourth reference signal group is the second DMRS, the DMRS corresponding to the fourth reference signal group is determined to be the second DMRS corresponding to each candidate reference signal in the fourth reference signal group. That is, the second DMRS is used to evaluate the link quality corresponding to each candidate reference signal in the fourth reference signal group.

[0594] For example, assuming that the fourth reference signal group includes three candidate reference signals, namely, a first candidate reference signal, a second candidate reference signal, and a third candidate reference signal. If the second indication information indicates that the DMRS corresponding to the fourth reference signal group is the first DMRS, it is determined that the DMRSs corresponding to the first candidate reference signal, the second candidate reference signal, and the third candidate reference signal are all first DMRSs, and the first candidate reference signal and the first DMRS are used to evaluate the link quality corresponding to the first candidate reference signal, the second candidate reference signal and the first DMRS are used to evaluate the link quality corresponding to the second candidate reference signal, and the third candidate reference signal and the first DMRS are used to evaluate the link quality corresponding to the third candidate reference signal. Alternatively, if the second indication information indicates that the DMRS corresponding to the fourth reference signal group is the second DMRS, it is determined that the DMRSs corresponding to the first candidate reference signal, the second candidate reference signal, and the third candidate reference signal are all second DMRSs, and the first candidate reference signal and the second DMRS are used to evaluate the link quality corresponding to the first candidate reference signal, the second candidate reference signal and the second DMRS are used to evaluate the link quality corresponding to the second candidate reference signal, and the third candidate reference signal and the second DMRS are used to evaluate the link quality corresponding to the third candidate reference signal.

[0595] The method provided in the embodiment of the present application can effectively save signaling overhead while determining which DMRS to use to evaluate the link quality of the beam by determining the DMRS corresponding to the fourth reference signal group as the DMRS corresponding to each candidate reference signal in the fourth reference signal group.

[0596] In a further embodiment based on the embodiment shown in FIG. 15 , the step of determining the DMRS corresponding to the candidate reference signals in the fourth reference signal group may be replaced by the following sub-steps:

[0597] Step 343: Determine the DMRS corresponding to each candidate reference signal in the fourth reference signal group indicated by the second indication information.

[0598] The DMRS corresponding to each candidate reference signal is used to evaluate the link quality corresponding to each candidate reference signal.

[0599] In a case where the second indication information indicates that each candidate reference signal in the fourth reference signal group corresponds to a DMRS, the DMRS corresponding to each candidate reference signal in the fourth reference signal group indicated by the second indication information is determined to be the DMRS corresponding to each candidate reference signal in the fourth reference signal group when evaluating link quality.

[0600] The DMRS corresponding to each candidate reference signal in the fourth reference signal group is either a first DMRS or a second DMRS. The DMRS corresponding to each candidate reference signal in the third reference signal group is either a first-type DMRS or a second-type DMRS, and the DMRSs corresponding to different candidate reference signals may be the same or different. The first-type DMRS is a DMRS that uses one or more of the same resource elements as control information, and the second-type DMRS is a DMRS that uses different resource elements than control information. The first DMRS may be either a first-type DMRS or a second-type DMRS, and the second DMRS may be a second-type DMRS.

[0601] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0602] Exemplarily, assuming that the fourth reference signal group includes three candidate reference signals, namely a first candidate reference signal, a second candidate reference signal, and a third candidate reference signal, when the second indication information indicates that the DMRS corresponding to the first candidate reference signal is the first DMRS, the DMRS corresponding to the second candidate reference signal is the first DMRS, and the DMRS corresponding to the third candidate reference signal is the second DMRS, it is determined that the first candidate reference signal and the first DMRS corresponding to the first candidate reference signal are used to evaluate the link quality corresponding to the first candidate reference signal, the second candidate reference signal and the first DMRS corresponding to the second candidate reference signal are used to evaluate the link quality corresponding to the second candidate reference signal, and the third candidate reference signal and the second DMRS corresponding to the third candidate reference signal are used to evaluate the link quality corresponding to the third candidate reference signal.

[0603] The method provided in the embodiment of the present application determines the DMRS corresponding to each candidate reference signal in the fourth reference signal group as the DMRS corresponding to each candidate reference signal in the fourth reference signal group, so that it is possible to flexibly determine which DMRS to use as the hypothesis, thereby enabling more accurate judgment of the link quality.

[0604] It is worth noting that any of the above steps 341 to 343 can be implemented as a separate embodiment.

[0605] In addition, the above steps 321 and 341 can be combined and implemented as a new embodiment. The above steps 321 and 342 can be combined and implemented as a new embodiment. The above steps 321 and 343 can be combined and implemented as a new embodiment. The above steps 322 and 341 can be combined and implemented as a new embodiment. The above steps 322 and 342 can be combined and implemented as a new embodiment. The above steps 322 and 343 can be combined and implemented as a new embodiment. The above steps 323 and 341 can be combined and implemented as a new embodiment. The above steps 323 and 342 can be combined and implemented as a new embodiment. The above steps 323 and 343 can be combined and implemented as a new embodiment.

[0606] FIG16 shows a flow chart of a method for determining a DMRS provided by an exemplary embodiment of the present application. The method is executed by a first terminal device, and the method further includes:

[0607] Step 360: Report the target reference signal.

[0608] The target reference signal is a reference signal selected from one or more candidate reference signals that meets a link quality condition. The DMRS corresponding to the target reference signal is a first DMRS or a second DMRS, and the DMRS corresponding to the target reference signal is a first-type DMRS or a second-type DMRS. The first-type DMRS is a DMRS that uses one or more of the same resource elements as the control information, and the second-type DMRS is a DMRS that uses different resource elements than the control information. The first DMRS can be a first-type DMRS or a second-type DMRS, and the second DMRS can be a second-type DMRS.

[0609] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0610] The DMRS corresponding to the target reference signal is used to evaluate the link quality corresponding to the target reference signal.

[0611] In some embodiments, the target reference signal and the DMRS corresponding to the target reference signal are reported, that is, the target reference signal and the DMRS corresponding to the target reference signal are reported simultaneously.

[0612] In some embodiments, when the DMRS corresponding to the target reference signal is a first DMRS, the target reference signal and the first DMRS are reported. Optionally, the first DMRS is a first type DMRS.

[0613] In some embodiments, when the DMRS corresponding to the target reference signal is a second DMRS, the target reference signal and the second DMRS are reported. Optionally, the second DMRS is a second type DMRS.

[0614] The method provided in the embodiment of the present application enables the first terminal device to report based on its own situation by simultaneously reporting the target reference signal and the DMRS corresponding to the target reference signal, which is conducive to matching subsequent communication transmissions and improving transmission performance.

[0615] FIG17 shows a flow chart of a method for determining a DMRS provided by an exemplary embodiment of the present application. In a further embodiment based on the embodiment shown in FIG16 , before steps 320 , 340 , and 360 , the method further includes:

[0616] Step 380: Report terminal capabilities.

[0617] Optionally, a third terminal capability is reported. The third terminal capability is used to indicate that the first terminal device supports the use of a first type of DMRS. The first type of DMRS is a DMRS that uses one or more of the same resource elements as the control information.

[0618] In some embodiments, the third terminal capability is transmitted via RRC signaling, or the third terminal capability is transmitted via MAC CE signaling.

[0619] In some embodiments, the third terminal capability is reported according to one or more of the following options:

[0620] First frequency band;

[0621] The first frequency band combination;

[0622] Each frequency band in the first frequency band combination;

[0623] Each carrier on each frequency band in the first frequency band combination;

[0624] The first target frequency band range;

[0625] The first target terminal device.

[0626] Optionally, the third terminal capability is reported for a frequency band. That is, the terminal capability corresponding to the current frequency band can be independently reported for different frequency bands, which is conducive to improving the freedom of terminal devices.

[0627] Optionally, the third terminal capability is reported for a band combination. That is, the terminal capability corresponding to the current band combination can be independently reported for different band combinations. This is conducive to improving the degree of freedom of the terminal device.

[0628] Optionally, the third terminal capability is reported independently for each frequency band in a band combination. That is, the terminal capability corresponding to the current frequency band can be independently reported for different frequency bands in different band combinations. This is conducive to improving the degree of freedom of terminal devices.

[0629] Optionally, the third terminal capability is reported independently for each carrier on each frequency band in a band combination. That is, the terminal capability corresponding to the current carrier can be independently reported for different carriers in different frequency bands in different band combinations. This helps to increase the degree of freedom of the terminal device.

[0630] Optionally, the third terminal capability is reported for a frequency range. That is, the terminal capability corresponding to the current frequency range can be independently reported for different frequency ranges, which is conducive to improving the freedom of terminal devices.

[0631] Optionally, the third terminal capability is reported for the terminal device. That is, different terminal devices can independently report the terminal capabilities corresponding to the terminal device itself. This can effectively reduce the signaling overhead of the terminal device reporting the terminal capabilities.

[0632] In some embodiments, the third terminal capability is further used to indicate one or more of the following options:

[0633] Supported power parameters;

[0634] Mode that supports the first type of DMRS;

[0635] Supporting frequency domain density of the first type of DMRS;

[0636] Supporting time domain density of the first type of DMRS.

[0637] Optionally, a fourth terminal capability is reported. The fourth terminal capability is used to indicate support for determining DMRSs corresponding to candidate reference signals in a reference signal group, where the reference signal group includes the third reference signal group and / or the fourth reference signal group.

[0638] Optionally, the fourth terminal capability is used to indicate support for determining the DMRS corresponding to the candidate reference signals in the third reference signal group. The candidate reference signals in the third reference signal group and the DMRS corresponding to the candidate reference signals are used to evaluate the third link quality. The third link quality is used to select a target reference signal that meets the link quality condition from one or more candidate reference signals. The DMRS corresponding to the candidate reference signals in the third reference signal group is a first DMRS or a second DMRS, and the DMRS corresponding to the candidate reference signals in the third reference signal group is a first type DMRS or a second type DMRS. The first type DMRS is a DMRS that uses one or more of the same resource elements as the control information, and the second type DMRS is a DMRS that uses different resource elements from the control information.

[0639] Optionally, the fourth terminal capability is used to indicate support for determining the DMRS corresponding to the candidate reference signals in the fourth reference signal group. The candidate reference signals in the fourth reference signal group and the DMRS corresponding to the candidate reference signals are used to evaluate the fourth link quality. The fourth link quality is used to select a target reference signal that meets the link quality condition from one or more candidate reference signals. The DMRS corresponding to the candidate reference signals in the fourth reference signal group is a first DMRS or a second DMRS, and the DMRS corresponding to the candidate reference signals in the fourth reference signal group is a first type DMRS or a second type DMRS. The first type DMRS is a DMRS that uses one or more of the same resource elements as the control information, and the second type DMRS is a DMRS that uses different resource elements from the control information.

[0640] In some embodiments, the first DMRS may be a first type DMRS or a second type DMRS, and the second DMRS may be a second type DMRS. Optionally, the fourth terminal capability is used to indicate support for determining DMRSs corresponding to candidate reference signals in the third reference signal group and DMRSs corresponding to candidate reference signals in the fourth reference signal group.

[0641] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0642] In some embodiments, the fourth terminal capability is transmitted through RRC signaling, or the fourth terminal capability is transmitted through MAC CE signaling.

[0643] In some embodiments, the fourth terminal capability is reported according to one or more of the following options:

[0644] Second frequency band;

[0645] Second frequency band combination;

[0646] Each frequency band in the second frequency band combination;

[0647] Each carrier on each band in the second band combination;

[0648] Second target frequency band range;

[0649] Second target terminal device.

[0650] Optionally, the fourth terminal capability is reported for a frequency band. That is, different frequency bands can independently report the terminal capabilities corresponding to the frequency bands, which is conducive to improving the degree of freedom of terminal devices.

[0651] Optionally, the fourth terminal capability is reported for a band combination. That is, different band combinations can independently report the terminal capability corresponding to the band combination. This is conducive to improving the degree of freedom of terminal devices.

[0652] Optionally, the fourth terminal capability is reported independently for each frequency band in a band combination. That is, different frequency bands in different band combinations can independently report the terminal capability corresponding to the frequency band. This is conducive to improving the degree of freedom of terminal devices.

[0653] Optionally, the fourth terminal capability is reported independently for each carrier on each frequency band in a band combination. That is, different carriers in different frequency bands in different band combinations can independently report the terminal capability corresponding to the carrier. This helps to increase the degree of freedom of terminal devices.

[0654] Optionally, the fourth terminal capability is reported for a frequency range. That is, different frequency ranges can independently report the terminal capabilities corresponding to the frequency ranges, which is conducive to improving the degree of freedom of terminal devices.

[0655] Optionally, the fourth terminal capability is reported for the terminal device. That is, different terminal devices can independently report the terminal capabilities corresponding to the terminal device itself. This can effectively reduce the signaling overhead of the terminal device reporting the terminal capabilities.

[0656] Optionally, the third terminal capability and the fourth terminal capability can be reported together; optionally, the third terminal capability and the fourth terminal capability can be reported using the same options, for example, the first frequency band corresponding to the third terminal capability and the second frequency band corresponding to the fourth terminal capability are the same frequency band.

[0657] It is worth noting that the above step 360 can be performed before step 310, or after step 310 and before step 320, or after step 320 and before step 340, or after step 340. This embodiment of the present application does not limit this.

[0658] Figure 18 shows a flow chart of a method for determining a DMRS provided by an exemplary embodiment of the present application. The method is executed by a second terminal device or a network device, and the method includes:

[0659] Step 30: Send the second indication information.

[0660] In some embodiments, the second indication information is used to indicate a DMRS corresponding to a candidate reference signal in a third reference signal group. The candidate reference signals in the third reference signal group and the DMRS corresponding to the candidate reference signals in the third reference signal group are used to evaluate a third link quality, and the DMRS corresponding to the candidate reference signals in the third reference signal group is a first DMRS or a second DMRS. The first DMRS may be a first-type DMRS or a second-type DMRS, and the second DMRS may be a second-type DMRS.

[0661] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0662] In some embodiments, the candidate reference signals in the third reference signal group and the DMRS corresponding to the candidate reference signals in the third reference signal group are used to evaluate the third link quality. Alternatively, it can be understood that the third link quality is evaluated in combination with the candidate reference signals in the third reference signal group and the DMRS corresponding to the candidate reference signals in the third reference signal group. The candidate reference signals in the third reference signal group are used to evaluate the third link quality, and the DMRS corresponding to the candidate reference signals are also used to evaluate the third link quality.

[0663] In some embodiments, the third link quality is the link quality corresponding to a candidate reference signal in the third reference signal group. Alternatively, it can be understood that the third link quality is the link quality of the beam corresponding to the candidate reference signal in the third reference signal group. The third link quality is used to select a target reference signal that meets a link quality condition from one or more candidate reference signals.

[0664] In some embodiments, the second indication information is used to indicate a DMRS corresponding to the third reference signal group, wherein the DMRS corresponding to the third reference signal group is a first type DMRS or a second type DMRS.

[0665] In some embodiments, the second indication information is used to indicate a DMRS corresponding to each candidate reference signal in the third reference signal group, wherein the DMRS corresponding to each candidate reference signal in the third reference signal group is the first DMRS or the second DMRS, and the DMRSs corresponding to different candidate reference signals are the same or different.

[0666] In some embodiments, the second indication information is further used to indicate a DMRS corresponding to a candidate reference signal in a fourth reference signal group. The candidate reference signals in the fourth reference signal group and the DMRS corresponding to the candidate reference signals in the fourth reference signal group are used to evaluate a fourth link quality, and the DMRS corresponding to the candidate reference signals in the fourth reference signal group is a first DMRS or a second DMRS. The first DMRS may be a first-type DMRS or a second-type DMRS, and the second DMRS may be a second-type DMRS.

[0667] In some embodiments, the candidate reference signals in the fourth reference signal group and the DMRS corresponding to the candidate reference signals in the fourth reference signal group are used to evaluate the fourth link quality. Alternatively, it can be understood that the fourth link quality is evaluated in combination with the candidate reference signals in the fourth reference signal group and the DMRS corresponding to the candidate reference signals in the fourth reference signal group. The candidate reference signals in the fourth reference signal group are used to evaluate the fourth link quality, and the DMRS corresponding to the candidate reference signals are also used to evaluate the fourth link quality.

[0668] In some embodiments, the fourth link quality is the link quality corresponding to a candidate reference signal in the fourth reference signal group. Alternatively, it can be understood that the fourth link quality is the link quality of the beam corresponding to the candidate reference signal in the fourth reference signal group. The fourth link quality is used to select a target reference signal that meets a link quality condition from one or more candidate reference signals.

[0669] Specifically, the function of the second indication information is described in detail in steps 323 and 343 above.

[0670] Figure 19 shows a flow chart of a method for determining a DMRS provided by an exemplary embodiment of the present application. The method is executed by a second terminal device or a network device, and the method includes:

[0671] Step 31: Receive a target reference signal.

[0672] In some embodiments, a second terminal device or a network device receives information corresponding to a target reference signal. The target reference signal is a reference signal selected from one or more candidate reference signals that satisfies a link quality condition. The DMRS corresponding to the target reference signal is a first DMRS or a second DMRS. The first DMRS may be a first type DMRS or a second type DMRS, and the second DMRS may be a second type DMRS. The first type DMRS is a DMRS that uses one or more of the same resource elements as the control information, and the second type DMRS is a DMRS that uses different resource elements than the control information.

[0673] The DMRS corresponding to the target reference signal is used to evaluate the link quality corresponding to the target reference signal.

[0674] In some embodiments, a target reference signal and a DMRS corresponding to the target reference signal are received, wherein the DMRS corresponding to the target reference signal is a first DMRS or a second DMRS.

[0675] Figure 20 shows a flow chart of a method for determining a DMRS provided by an exemplary embodiment of the present application. The method is executed by a second terminal device or a network device, and the method includes:

[0676] Step 32: Receive terminal capabilities.

[0677] Optionally, a third terminal capability is received, where the third terminal capability is used to indicate support for use of the first type of DMRS.

[0678] Optionally, a fourth terminal capability is received, where the fourth terminal capability is used to indicate support for determining a DMRS corresponding to a candidate reference signal in a third reference signal group.

[0679] Specifically, the implementation of the terminal capability is detailed in step 380 above.

[0680] It is worth noting that, usually, the above step 32 is performed before step 30.

[0681] In some embodiments, the first type DMRS is a DMRS that uses at least one of the same resource elements as the control information. The second type DMRS is a DMRS that uses different resource elements than the control information.

[0682] In some embodiments, FIG21 shows a flowchart of a method for determining a DMRS provided by an exemplary embodiment of the present application. The method is jointly performed by a first terminal device, a second terminal device and / or a network device, and the method further includes:

[0683] Step 4: The first terminal device reports terminal capabilities to the second terminal device and / or the network device;

[0684] Specifically, the implementation method of the terminal capability refers to the above step 310.

[0685] Step 5: The second terminal device and / or network device sends second indication information;

[0686] Optionally, the second indication information is used to indicate or configure a candidate reference signal in the reference signal group.

[0687] Step 6: The first terminal device determines the DMRS corresponding to the candidate reference signal;

[0688] Optionally, the first terminal device determines the DMRS corresponding to each candidate reference signal in the third reference signal group. For a specific determination method, see the above step 320. Optionally, the first terminal device determines the DMRS corresponding to each candidate reference signal in the fourth reference signal group. For a specific determination method, see the above step 340.

[0689] The first terminal device evaluates link quality based on candidate reference signals in the reference signal group.

[0690] Step 7: The first terminal device reports the DMRS corresponding to the target reference signal to the second terminal device and / or the network device.

[0691] The target reference signal is a reference signal that satisfies the link quality condition and is selected from one or more candidate reference signals. Specifically, the DMRS corresponding to the target reference signal refers to step 360 above.

[0692] The above steps do not necessarily include all of them, and may include one or more of them.

[0693] FIG22 shows a flow chart of a method for determining a DMRS provided by an exemplary embodiment of the present application. The method is executed by a first terminal device and includes:

[0694] Step 420: Receive a first signal.

[0695] The first signal may be a certain signal (eg, a reference signal RS), a certain channel (eg, PDSCH, PDCCH), or information transmitted by a certain channel (eg, DCI transmitted by PDCCH).

[0696] In some embodiments, the first signal is a response signal sent by the network device or the second terminal device to the first terminal device. The first signal is used to respond to the first reporting information. Optionally, the first reporting information may include a target reference signal. The first reporting information is reported by the first terminal device to the network device or the second terminal device. The target reference signal is a reference signal that meets a link quality condition and is selected by the first terminal device from all candidate reference signals.

[0697] In some embodiments, the target reference signal is the target reference signal reported in step 360. That is, the target reference signal is a signal that satisfies a link quality condition and is selected from one or more candidate reference signals based on the third link quality and / or the fourth link quality. Alternatively, it can be understood that the link quality corresponding to the target reference signal is evaluated based on the target reference signal and the DMRS corresponding to the target reference signal.

[0698] In some embodiments, the link quality corresponding to the target reference signal is not evaluated based on the DMRS corresponding to the target reference signal. That is, the link quality corresponding to the target reference signal is determined based on the RSRP of the target reference signal, or the link quality corresponding to the target reference signal is determined based on the SINR of the target reference signal.

[0699] In some embodiments, a port of the first signal is quasi co-located (QCL) with a target reference signal, or a DMRS corresponding to the first signal is quasi co-located (QCL) with a target reference signal.

[0700] In some embodiments, the first signal is a PDCCH, or the first signal is a DCI. In this case, the first terminal device receives the first signal based on a first search space, where the first search space is indicated by indication information, which is sent to the first terminal device by the first network device or the second terminal device. The first search space corresponds to a first CORESET. Optionally, the first CORESET does not correspond to any other search space other than the first search space. Optionally, the first CORESET may also correspond to other search spaces. In the case where the first CORESET corresponds to other search spaces, the other search spaces may be quasi-co-located with other signals.

[0701] Optionally, the indication information may be sent via one or more of RRC signaling, MAC CE signaling, and DCI signaling.

[0702] It is worth noting that the indication information mentioned in this application, including beam indication information, DMRS indication information, first indication information, second indication information, third indication information and other possible indication information, may all be different indication information; or, part of it may be the same indication information and the other part may be different indication information; or, it may all be the same indication information.

[0703] In some embodiments, the first signal is transmitted based on a first DMRS, or the first signal is transmitted based on a second DMRS. The first signal is transmitted based on a first-type DMRS, or the first signal is transmitted based on a second-type DMRS. The first-type DMRS is a DMRS that uses one or more of the same resource elements as control information, and the second-type DMRS is a DMRS that uses different resource elements than control information. The first DMRS is either a first-type DMRS or a second-type DMRS, and the second DMRS is a second-type DMRS.

[0704] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0705] In some embodiments, the first signal is transmitted based on the first DMRS, which can also be understood as the DMRS corresponding to the first signal is the first DMRS, or the first signal adopts the first DMRS as the DMRS used. Similarly, the first signal is transmitted based on the second DMRS, which can also be understood as the DMRS corresponding to the first signal is the second DMRS, or the first signal adopts the second DMRS as the DMRS used. For example, when the first signal is the PDCCH, the PDCCH is transmitted based on the first DMRS, that is, the DMRS corresponding to the PDCCH is the first DMRS, or the PDCCH adopts the first DMRS as the DMRS used; the PDCCH is transmitted based on the second DMRS, that is, the DMRS corresponding to the PDCCH is the second DMRS, or the PDCCH adopts the second DMRS as the DMRS used.

[0706] In some embodiments, the first signal is transmitted based on a default DMRS, where the default DMRS is a first DMRS or a second DMRS, and the default DMRS is a first-type DMRS or a second-type DMRS. Optionally, the default DMRS is based on a DMRS used by a control channel. For example, if the DMRS used by the control channel is the first DMRS, the default DMRS is the first DMRS; if the DMRS used by the control channel is the second DMRS, the default DMRS is the second DMRS.

[0707] In some embodiments, the first signal is transmitted based on the DMRS indicated by the third indication information, the DMRS indicated by the third indication information is the first DMRS or the second DMRS, and the DMRS indicated by the third indication information is the first type DMRS or the second type DMRS. The third indication information is sent by the network device or the second terminal device to the first terminal device. The third indication information is used to indicate that the first signal is transmitted based on the first DMRS or the second DMRS. Optionally, the third indication information indicates that the first signal is transmitted based on the first DMRS. Optionally, the third indication information indicates that the first signal is transmitted based on the second DMRS.

[0708] In some embodiments, the first signal is transmitted based on the DMRS corresponding to the target reference signal. In the case where the first terminal device reports the DMRS corresponding to the target reference signal to the network device or the second terminal device, the network device or the second terminal device can select the DMRS corresponding to the target reference signal to transmit the first signal. Optionally, in the case where the first terminal device reports to the network device or the second terminal device that the DMRS corresponding to the target reference signal is the first DMRS, the network device or the second terminal device chooses to use the first DMRS to transmit the first signal. Optionally, in the case where the first terminal device reports to the network device or the second terminal device that the DMRS corresponding to the target reference signal is the second DMRS, the network device or the second terminal device chooses to use the second DMRS to transmit the first signal.

[0709] The method provided in this embodiment receives a first signal transmitted based on a first DMRS or a first signal transmitted based on a second DMRS when two DMRSs exist, and determines which DMRS the first signal is transmitted based on, thereby ensuring the stability of subsequent communications.

[0710] In a further embodiment based on the embodiment shown in FIG22 above, FIG23 shows a flow chart of a method for determining a DMRS provided by an exemplary embodiment of the present application. The method is executed by a first terminal device, and the method further includes:

[0711] Step 520: Receive fourth indication information.

[0712] In some embodiments, the fourth indication information is used to indicate one or more of a receiver, a receiver algorithm, and an AI model used when receiving the first signal. Optionally, the fourth indication information includes one or more of the following options:

[0713] First receiver identification;

[0714] First algorithm identifier;

[0715] First model identification;

[0716] A first functionality flag or configuration information of the first functionality.

[0717] Among them, the first receiver identifier is used to indicate the receiver used when receiving the first signal, the first algorithm identifier is used to indicate the receiver algorithm used when receiving the first signal, the first model identifier is used to indicate the AI ​​model used when receiving the first signal, and the first functionality flag or the configuration information of the first function is used to indicate or activate the corresponding function at this time.

[0718] The method provided in this embodiment directly determines the receiving method for receiving the first signal by receiving the fourth indication information, thereby enabling more efficient communication transmission between the first terminal device and the network device or the first terminal device and the second terminal device.

[0719] In a further embodiment based on the embodiment shown in FIG22 above, FIG24 shows a flow chart of a method for determining a DMRS provided by an exemplary embodiment of the present application. The method is executed by a first terminal device, and the method further includes:

[0720] Step 620: When the first signal is used to schedule the PDSCH, determine the DMRS corresponding to the PDSCH.

[0721] In some embodiments, the DMRS corresponding to the PDSCH is a first DMRS or a second DMRS, and the DMRS corresponding to the PDSCH is a first-type DMRS or a second-type DMRS. The first DMRS may be a first-type DMRS or a second-type DMRS, and the second DMRS may be a second-type DMRS. The first-type DMRS is a DMRS that uses one or more of the same resource elements as control information, and the second-type DMRS is a DMRS that uses different resource elements than control information.

[0722] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0723] In some embodiments, when the first signal is used to schedule a PDSCH, the DMRS corresponding to the PDSCH is determined to be a first DMRS. Alternatively, it can be understood that the first DMRS is used as the assumed DMRS, or it is assumed that the first DMRS is used as the DMRS corresponding to the PDSCH. For example, in this case, the first DMRS is a first-type DMRS.

[0724] In some embodiments, when the first signal is used to schedule a PDSCH, determining that the DMRS corresponding to the PDSCH is the second DMRS. Alternatively, it can be understood that the second DMRS is used as the assumed DMRS, or that the second DMRS is assumed to be the DMRS corresponding to the PDSCH. For example, in this case, the second DMRS is a second-type DMRS.

[0725] In some embodiments, the first signal includes a first DCI. In some embodiments, when the first DCI is used to schedule a PDSCH, determining that the DMRS corresponding to the PDSCH is the first DMRS. In some embodiments, when the first DCI is used to schedule a PDSCH, determining that the DMRS corresponding to the PDSCH is the second DMRS.

[0726] The method provided in this embodiment can determine the DMRS corresponding to the PDSCH when the first DCI schedules the PDSCH, thereby ensuring that communication confusion does not occur when two types of DMRS exist.

[0727] In a further embodiment based on the embodiment shown in FIG. 24 , the above step of determining the DMRS corresponding to the PDSCH may be replaced by the following sub-steps:

[0728] Step 621: Determine that the DMRS corresponding to the PDSCH is the previously used DMRS, or determine that the DMRS corresponding to the PDSCH is the DMRS indicated by the fifth indication information.

[0729] In some embodiments, the previously used DMRS is a first DMRS or a second DMRS, and the previously used DMRS is a first-type DMRS or a second-type DMRS. The first DMRS may be a first-type DMRS or a second-type DMRS, and the second DMRS may be a second-type DMRS. The first-type DMRS is a DMRS that uses one or more of the same resource elements as control information, and the second-type DMRS is a DMRS that uses different resource elements than control information.

[0730] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0731] In some embodiments, the previously used DMRS is the DMRS used last by the PDSCH or the DMRS used most recently by the PDSCH.

[0732] In some embodiments, when the DMRS used last by the PDSCH is the first DMRS, the DMRS corresponding to the PDSCH is determined to be the first DMRS. That is, it is assumed that the first DMRS is used as the DMRS corresponding to the PDSCH. For example, in this case, the first DMRS is a first-type DMRS.

[0733] In some embodiments, when the DMRS used last by the PDSCH is the second DMRS, the DMRS corresponding to the PDSCH is determined to be the second DMRS. That is, it is assumed that the second DMRS is used as the DMRS corresponding to the PDSCH. For example, in this case, the second DMRS is a second type DMRS.

[0734] In some embodiments, when the fifth indication information indicates the first DMRS, the DMRS corresponding to the PDSCH is determined to be the first DMRS.

[0735] In some embodiments, when the fifth indication information indicates the second DMRS, the DMRS corresponding to the PDSCH is determined to be the second DMRS.

[0736] The method provided in this embodiment determines that the process of determining the DMRS corresponding to the PDSCH is not affected by other processes, which is conducive to further optimization of the network.

[0737] In a further embodiment based on the embodiment shown in FIG. 24 , the above step of determining the DMRS corresponding to the PDSCH may be replaced by the following sub-steps:

[0738] Step 622: Determine the target DMRS as the DMRS corresponding to the PDSCH.

[0739] The target DMRS is the first DMRS or the second DMRS, in which case the first DMRS is a first-type DMRS or a second-type DMRS, and the second DMRS is a second-type DMRS. The first-type DMRS is a DMRS that uses one or more of the same resource elements as the control information, and the second-type DMRS is a DMRS that uses different resource elements than the control information.

[0740] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0741] The target DMRS is a default DMRS, or in other words, the target DMRS corresponds to a default DMRS type.

[0742] In some embodiments, the first DMRS is determined to be the DMRS corresponding to the PDSCH. That is, it is assumed that the first DMRS is used as the DMRS corresponding to the PDSCH.

[0743] In some embodiments, the second DMRS is determined to be the DMRS corresponding to the PDSCH. That is, it is assumed that the second DMRS is used as the DMRS corresponding to the PDSCH.

[0744] The method provided in this embodiment can effectively save signaling overhead by directly determining the target DMRS as the DMRS corresponding to the PDSCH.

[0745] In a further embodiment based on the embodiment shown in FIG. 24 , the above step of determining the DMRS corresponding to the PDSCH may be replaced by the following sub-steps:

[0746] Step 623: Determine that the DMRS corresponding to the first signal is the DMRS corresponding to the PDSCH.

[0747] In some embodiments, the DMRS corresponding to the first signal is a first DMRS or a second DMRS, and the DMRS corresponding to the first signal is a first-type DMRS or a second-type DMRS. The first DMRS is a first-type DMRS or a second-type DMRS, and the second DMRS is a second-type DMRS. The first-type DMRS is a DMRS that uses one or more of the same resource elements as the control information, and the second-type DMRS is a DMRS that uses different resource elements than the control information.

[0748] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0749] In some embodiments, when the DMRS corresponding to the first signal is the first DMRS, the DMRS corresponding to the PDSCH is determined to be the first DMRS. That is, it is assumed that the first DMRS corresponding to the first signal is used as the DMRS corresponding to the PDSCH.

[0750] In some embodiments, when the DMRS corresponding to the first signal is the second DMRS, the DMRS corresponding to the PDSCH is determined to be the second DMRS. That is, it is assumed that the second DMRS corresponding to the first signal is used as the DMRS corresponding to the PDSCH.

[0751] It is worth noting that, when the DMRS corresponding to the first signal is determined to be the DMRS corresponding to the PDSCH, the DMRS corresponding to the first signal and the DMRS corresponding to the PDSCH are not necessarily exactly the same DMRS. Rather, it should be understood that, when the DMRS corresponding to the first signal is a non-orthogonal DMRS, the DMRS corresponding to the PDSCH is also a non-orthogonal DMRS; and when the DMRS corresponding to the first signal is an orthogonal DMRS, the DMRS corresponding to the PDSCH is also an orthogonal DMRS. However, the DMRS corresponding to the first signal and the DMRS corresponding to the PDSCH may be different, for example, the DMRS pattern is different, or the DMRS sequence is different.

[0752] The method provided in this embodiment determines the DMRS corresponding to the PDSCH based on the DMRS corresponding to the first signal, so that the control channel and the data channel in the communication system can use similar DMRS patterns, thereby simplifying subsequent processing of the terminal device.

[0753] It is worth noting that any of the above steps 621 to 623 can be implemented as a separate embodiment.

[0754] In a further embodiment based on the embodiment shown in FIG24 above, FIG25 shows a flow chart of a method for determining a DMRS provided by an exemplary embodiment of the present application. The method is executed by a first terminal device, and the method further includes:

[0755] Step 720: Receive sixth indication information.

[0756] In some embodiments, the sixth indication information indicates one or more of a receiver, a receiver algorithm, and an AI model for receiving the PDSCH. Optionally, the sixth indication information includes one or more of the following options:

[0757] Second receiver identification;

[0758] Second algorithm identifier;

[0759] Second model identification;

[0760] A secondary functionality flag or configuration information of the secondary functionality.

[0761] Among them, the second receiver identifier is used to indicate the receiver used when receiving PDSCH, the second algorithm identifier is used to indicate the receiver algorithm used when receiving PDSCH, the second model identifier is used to indicate the AI ​​model used when receiving PDSCH, and the second functionality flag or the configuration information of the second function is used to indicate or activate the corresponding function at this time.

[0762] The method provided in this embodiment directly determines the receiving method for receiving PDSCH by receiving the sixth indication information, thereby enabling more efficient communication transmission between the first terminal device and the network device or the first terminal device and the second terminal device.

[0763] In some embodiments, when the first DCI is used to schedule PDSCH, the response signal corresponding to the PDSCH can be transmitted via PUCCH. In a further embodiment based on the embodiment shown in FIG24 above, as shown in FIG26, the above method further includes:

[0764] Step 820: Determine the DMRS corresponding to the PUCCH.

[0765] In some embodiments, the PUCCH is used to transmit a second signal corresponding to the PDSCH. Optionally, the second signal is an acknowledgement / non-acknowledgement signal corresponding to the PDSCH, and the PDSCH is scheduled by the first signal.

[0766] In some embodiments, when the first signal is used to schedule the PDSCH, the DMRS corresponding to the PUCCH is determined. The DMRS corresponding to the PUCCH is the first DMRS or the second DMRS, and the DMRS corresponding to the PUCCH is the first type DMRS or the second type DMRS. The first DMRS can be the first type DMRS or the second type DMRS, and the second DMRS can be the second type DMRS. The first type DMRS is a DMRS that uses one or more of the same resource elements as the control information, and the second type DMRS is a DMRS that uses different resource elements than the control information.

[0767] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0768] In some embodiments, the DMRS corresponding to the PUCCH is determined to be the first DMRS. Alternatively, it can be understood that the first DMRS is assumed to be the DMRS, or it is assumed that the first DMRS is the DMRS corresponding to the PUCCH. For example, in this case, the first DMRS is a first type DMRS.

[0769] In some embodiments, determining that the DMRS corresponding to the PUCCH is the second DMRS can be understood as adopting the second DMRS as the DMRS assumption, or assuming that the second DMRS is adopted as the DMRS corresponding to the PUCCH. For example, in this case, the second DMRS is a second type DMRS.

[0770] The method provided in this embodiment can determine the DMRS corresponding to the PUCCH when two DMRSs exist, thereby ensuring the stability of the communication system.

[0771] In a further embodiment based on the embodiment shown in FIG. 26 , the above step 820 may be replaced by the following sub-steps:

[0772] Step 821: Determine whether the DMRS corresponding to the PUCCH is the previously used DMRS or determine whether the DMRS corresponding to the PUCCH is the DMRS indicated by the seventh indication information.

[0773] In some embodiments, the previously used DMRS is a first DMRS or a second DMRS, and the previously used DMRS is a first-type DMRS or a second-type DMRS. The first DMRS may be a first-type DMRS or a second-type DMRS, and the second DMRS may be a second-type DMRS. The first-type DMRS is a DMRS that uses one or more of the same resource elements as control information, and the second-type DMRS is a DMRS that uses different resource elements than control information.

[0774] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0775] In some embodiments, the previously used DMRS is the DMRS used last by the PUCCH or the DMRS used most recently by the PUCCH.

[0776] In some embodiments, when the DMRS last used by the PUCCH is the first DMRS, the DMRS corresponding to the PUCCH is determined to be the first DMRS. That is, it is assumed that the first DMRS is used as the DMRS corresponding to the PUCCH. For example, in this case, the first DMRS is a first-type DMRS.

[0777] In some embodiments, when the DMRS last used by the PUCCH is the second DMRS, the DMRS corresponding to the PUCCH is determined to be the second DMRS. That is, it is assumed that the second DMRS is used as the DMRS corresponding to the PUCCH. For example, in this case, the second DMRS is a second-type DMRS.

[0778] In some embodiments, when the seventh indication information indicates the first DMRS, the DMRS corresponding to the PDSCH is determined to be the first DMRS.

[0779] In some embodiments, when the seventh indication information indicates the second DMRS, the DMRS corresponding to the PDSCH is determined to be the second DMRS.

[0780] The method provided in this embodiment determines that the process of determining the DMRS corresponding to the PUCCH is not affected by other processes, which is beneficial to further network optimization.

[0781] In a further embodiment based on the embodiment shown in FIG. 26 , the above step 820 may be replaced by the following sub-steps:

[0782] Step 822: Determine that the target DMRS is the DMRS corresponding to the PUCCH.

[0783] The target DMRS is the first DMRS or the second DMRS, in which case the first DMRS is a first-type DMRS or a second-type DMRS, and the second DMRS is a second-type DMRS. The first-type DMRS is a DMRS that uses one or more of the same resource elements as the control information, and the second-type DMRS is a DMRS that uses different resource elements than the control information.

[0784] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0785] The target DMRS is a default DMRS, or in other words, the target DMRS corresponds to a default DMRS type.

[0786] In some embodiments, the first DMRS is determined to be the DMRS corresponding to the PUCCH. That is, it is assumed that the first DMRS is used as the DMRS corresponding to the PUCCH.

[0787] In some embodiments, the second DMRS is determined to be the DMRS corresponding to the PUCCH. That is, it is assumed that the second DMRS is used as the DMRS corresponding to the PUCCH.

[0788] The method provided in this embodiment can effectively save signaling overhead by directly determining the target DMRS as the DMRS corresponding to the PUCCH.

[0789] In a further embodiment based on the embodiment shown in FIG. 26 , the above step 820 may be replaced by the following sub-steps:

[0790] Step 823: Determine that the DMRS corresponding to the first signal is the DMRS corresponding to the PUCCH.

[0791] In some embodiments, the DMRS corresponding to the first signal is a first DMRS or a second DMRS, and the DMRS corresponding to the first signal is a first-type DMRS or a second-type DMRS. The first DMRS is a first-type DMRS or a second-type DMRS, and the second DMRS is a second-type DMRS. The first-type DMRS is a DMRS that uses one or more of the same resource elements as the control information, and the second-type DMRS is a DMRS that uses different resource elements than the control information.

[0792] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0793] In some embodiments, when the DMRS corresponding to the first signal is the first DMRS, the DMRS corresponding to the PUCCH is determined to be the first DMRS. That is, it is assumed that the first DMRS corresponding to the first signal is used as the DMRS corresponding to the PUCCH.

[0794] In some embodiments, when the DMRS corresponding to the first signal is the second DMRS, the DMRS corresponding to the PUCCH is determined to be the second DMRS. That is, it is assumed that the second DMRS corresponding to the first signal is used as the DMRS corresponding to the PUCCH.

[0795] It is worth noting that, when the DMRS corresponding to the first signal is determined to be the DMRS corresponding to the PUCCH, the DMRS corresponding to the first signal and the DMRS corresponding to the PUCCH are not necessarily exactly the same DMRS. Rather, it should be understood that, when the DMRS corresponding to the first signal is a non-orthogonal DMRS, the DMRS corresponding to the PUCCH is also a non-orthogonal DMRS; and when the DMRS corresponding to the first signal is an orthogonal DMRS, the DMRS corresponding to the PUCCH is also an orthogonal DMRS. However, the DMRS corresponding to the first signal and the DMRS corresponding to the PUCCH may be different, for example, the DMRS pattern is different, or the DMRS sequence is different.

[0796] The method provided in this embodiment determines the DMRS corresponding to the PUCCH based on the DMRS corresponding to the first signal, so that the control channel and the data channel in the communication system can adopt similar DMRS patterns, thereby simplifying subsequent processing of the terminal device.

[0797] It is worth noting that any of the above steps 821 to 823 can be implemented as a separate embodiment.

[0798] In a further embodiment based on the embodiment shown in FIG22 above, FIG27 shows a flow chart of a method for determining a DMRS provided by an exemplary embodiment of the present application. The method is executed by a first terminal device, and the method further includes:

[0799] Step 920: When the first signal is used to schedule the PUSCH, determine the DMRS corresponding to the PUSCH.

[0800] In some embodiments, the DMRS corresponding to the PUSCH is a first DMRS or a second DMRS, and the DMRS corresponding to the PUSCH is a first-type DMRS or a second-type DMRS. The first DMRS may be a first-type DMRS or a second-type DMRS, and the second DMRS may be a second-type DMRS. The first-type DMRS is a DMRS that uses one or more of the same resource elements as the control information, and the second-type DMRS is a DMRS that uses different resource elements than the control information.

[0801] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0802] In some embodiments, when the first signal is used to schedule a PUSCH, the DMRS corresponding to the PUSCH is determined to be the first DMRS. Alternatively, this may be understood as adopting the first DMRS as a DMRS hypothesis, or assuming that the first DMRS is adopted as the DMRS corresponding to the PUSCH. For example, in this case, the first DMRS is a first-type DMRS. In some embodiments, when the first signal is used to schedule a PUSCH, the DMRS corresponding to the PUSCH is determined to be the second DMRS. Alternatively, this may be understood as adopting the second DMRS as a DMRS hypothesis, or assuming that the second DMRS is adopted as the DMRS corresponding to the PUSCH. For example, in this case, the second DMRS is a second-type DMRS.

[0803] In some embodiments, the first signal includes a second DCI. In some embodiments, when the second DCI is used to schedule a PUSCH, determining that the DMRS corresponding to the PUSCH is the first DMRS. In some embodiments, when the second DCI is used to schedule a PUSCH, determining that the DMRS corresponding to the PUSCH is the second DMRS.

[0804] The method provided in this embodiment can determine the DMRS corresponding to the PUSCH when the second DCI schedules the PUSCH, thereby ensuring that communication confusion does not occur when two types of DMRS exist.

[0805] In a further embodiment based on the embodiment shown in FIG. 27 , the above step of determining the DMRS corresponding to the PUSCH may be replaced by the following sub-steps:

[0806] Step 921: Determine that the DMRS corresponding to the PUSCH is the previously used DMRS, or determine that the DMRS corresponding to the PUSCH is the DMRS indicated by the eighth indication information.

[0807] In some embodiments, the previously used DMRS is a first DMRS or a second DMRS, and the previously used DMRS is a first-type DMRS or a second-type DMRS. The first DMRS may be a first-type DMRS or a second-type DMRS, and the second DMRS may be a second-type DMRS. The first-type DMRS is a DMRS that uses one or more of the same resource elements as control information, and the second-type DMRS is a DMRS that uses different resource elements than control information.

[0808] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0809] In some embodiments, the previously used DMRS is the DMRS used last by the PUSCH or the DMRS used most recently by the PUSCH.

[0810] In some embodiments, when the DMRS last used by the PUSCH is the first DMRS, the DMRS corresponding to the PUSCH is determined to be the first DMRS. That is, it is assumed that the first DMRS is used as the DMRS corresponding to the PUSCH. For example, in this case, the first DMRS is a first-type DMRS.

[0811] In some embodiments, when the DMRS last used by the PUSCH is the second DMRS, the DMRS corresponding to the PUSCH is determined to be the second DMRS. That is, it is assumed that the second DMRS is used as the DMRS corresponding to the PUSCH. For example, in this case, the second DMRS is a second-type DMRS.

[0812] In some embodiments, when the eighth indication information indicates the first DMRS, the DMRS corresponding to the PUSCH is determined to be the first DMRS.

[0813] In some embodiments, when the eighth indication information indicates the second DMRS, the DMRS corresponding to the PUSCH is determined to be the second DMRS.

[0814] The method provided in this embodiment determines that the process of determining the DMRS corresponding to the PUSCH is not affected by other processes, which is conducive to further optimization of the network.

[0815] In a further embodiment based on the embodiment shown in FIG. 27 , the above step of determining the DMRS corresponding to the PUSCH may be replaced by the following sub-steps:

[0816] Step 922: Determine that the target DMRS is the DMRS corresponding to the PUSCH.

[0817] The target DMRS is the first DMRS or the second DMRS, in which case the first DMRS is a first-type DMRS or a second-type DMRS, and the second DMRS is a second-type DMRS. The first-type DMRS is a DMRS that uses one or more of the same resource elements as the control information, and the second-type DMRS is a DMRS that uses different resource elements than the control information.

[0818] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0819] The target DMRS is a default DMRS, or in other words, the target DMRS corresponds to a default DMRS type.

[0820] In some embodiments, the first DMRS is determined to be the DMRS corresponding to the PUSCH. That is, it is assumed that the first DMRS is used as the DMRS corresponding to the PUSCH.

[0821] In some embodiments, the second DMRS is determined to be the DMRS corresponding to the PUSCH. That is, it is assumed that the second DMRS is used as the DMRS corresponding to the PUSCH.

[0822] The method provided in this embodiment can effectively save signaling overhead by directly determining the target DMRS as the DMRS corresponding to the PUSCH.

[0823] In a further embodiment based on the embodiment shown in FIG. 27 , the above step of determining the DMRS corresponding to the PUSCH may be replaced by the following sub-steps:

[0824] Step 923: Determine that the DMRS corresponding to the first signal is the DMRS corresponding to the PUSCH.

[0825] In some embodiments, the DMRS corresponding to the first signal is a first DMRS or a second DMRS, and the DMRS corresponding to the first signal is a first-type DMRS or a second-type DMRS. The first DMRS is a first-type DMRS or a second-type DMRS, and the second DMRS is a second-type DMRS. The first-type DMRS is a DMRS that uses one or more of the same resource elements as the control information, and the second-type DMRS is a DMRS that uses different resource elements than the control information.

[0826] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0827] In some embodiments, when the DMRS corresponding to the first signal is the first DMRS, the DMRS corresponding to the PUSCH is determined to be the first DMRS. That is, it is assumed that the first DMRS corresponding to the first signal is used as the DMRS corresponding to the PUSCH.

[0828] In some embodiments, when the DMRS corresponding to the first signal is the second DMRS, the DMRS corresponding to the PUSCH is determined to be the second DMRS. That is, it is assumed that the second DMRS corresponding to the first signal is used as the DMRS corresponding to the PUSCH.

[0829] It is worth noting that when the DMRS corresponding to the first signal is determined to be the DMRS corresponding to the PUSCH, the DMRS corresponding to the first signal and the DMRS corresponding to the PUSCH are not necessarily exactly the same DMRS. Instead, it should be understood that when the DMRS corresponding to the first signal is a non-orthogonal DMRS, the DMRS corresponding to the PUSCH is also a non-orthogonal DMRS; and when the DMRS corresponding to the first signal is an orthogonal DMRS, the DMRS corresponding to the PUSCH is also an orthogonal DMRS. However, the DMRS corresponding to the first signal and the DMRS corresponding to the PUSCH may be different, for example, the DMRS pattern is different, or the DMRS sequence is different.

[0830] The method provided in this embodiment determines the DMRS corresponding to the PUSCH based on the DMRS corresponding to the first signal, so that the control channel and the data channel in the communication system can use similar DMRS patterns, thereby simplifying subsequent processing of the terminal device.

[0831] It is worth noting that any of the above steps 921 to 923 can be implemented as a separate embodiment.

[0832] FIG28 shows a flow chart of a method for determining a DMRS provided by an exemplary embodiment of the present application. In a further embodiment based on the embodiment shown in FIG22 , before step 420, the method further includes:

[0833] Step 1010: Report terminal capabilities.

[0834] Optionally, a fifth terminal capability is reported. The fifth terminal capability is used to indicate that the first terminal device supports the use of a first type of DMRS. The first type of DMRS is a DMRS that uses one or more of the same resource elements as the control information.

[0835] In some embodiments, the fifth terminal capability is transmitted via RRC signaling, or the fifth terminal capability is transmitted via MAC CE signaling.

[0836] In some embodiments, the fifth terminal capability is reported according to one or more of the following options:

[0837] First frequency band;

[0838] The first frequency band combination;

[0839] Each frequency band in the first frequency band combination;

[0840] Each carrier on each frequency band in the first frequency band combination;

[0841] The first target frequency band range;

[0842] The first target terminal device.

[0843] Optionally, the fifth terminal capability is reported for a frequency band. That is, the terminal capability corresponding to the current frequency band can be independently reported for different frequency bands, which is conducive to improving the degree of freedom of the terminal device.

[0844] Optionally, the fifth terminal capability is reported for a band combination. That is, the terminal capability corresponding to the current band combination can be independently reported for different band combinations. This is conducive to improving the degree of freedom of the terminal device.

[0845] Optionally, the fifth terminal capability is reported independently for each frequency band in a band combination. That is, the terminal capability corresponding to the current frequency band can be reported independently for different frequency bands in different frequency band combinations. This is conducive to improving the degree of freedom of the terminal device.

[0846] Optionally, the fifth terminal capability is reported independently for each carrier on each frequency band in a band combination. That is, the terminal capability corresponding to the current carrier can be independently reported for different carriers in different frequency bands in different band combinations. This is conducive to improving the degree of freedom of terminal devices.

[0847] Optionally, the fifth terminal capability is reported for a frequency range. That is, the terminal capability corresponding to the current frequency range can be independently reported for different frequency ranges, which is conducive to improving the degree of freedom of the terminal device.

[0848] Optionally, the fifth terminal capability is reported for the terminal device. That is, different terminal devices can independently report the terminal capabilities corresponding to the terminal device itself. This can effectively reduce the signaling overhead of the terminal device reporting the terminal capabilities.

[0849] In some embodiments, the fifth terminal capability is further used to indicate one or more of the following options:

[0850] Supported power parameters;

[0851] Mode that supports the first type of DMRS;

[0852] Supporting frequency domain density of the first type of DMRS;

[0853] Supporting time domain density of the first type of DMRS.

[0854] Optionally, a sixth terminal capability is reported, where the sixth terminal capability is used to indicate support for determining DMRS.

[0855] Optionally, the sixth terminal capability is used to indicate support for determining the DMRS corresponding to the PDSCH when the first DCI is used to schedule the PDSCH. Optionally, the sixth terminal capability is used to indicate support for determining the DMRS corresponding to the PUCCH when the first DCI is used to schedule the PDSCH. Optionally, the sixth terminal capability is used to indicate support for determining the DMRS corresponding to the PUSCH when the second DCI is used to schedule the PUSCH.

[0856] In some embodiments, the sixth terminal capability is transmitted via RRC signaling, or the sixth terminal capability is transmitted via MAC CE signaling.

[0857] In some embodiments, the sixth terminal capability is reported according to one or more of the following options:

[0858] Second frequency band;

[0859] Second frequency band combination;

[0860] Each frequency band in the second frequency band combination;

[0861] Each carrier on each band in the second band combination;

[0862] Second target frequency band range;

[0863] Second target terminal device.

[0864] Optionally, the sixth terminal capability is reported for a frequency band. That is, different frequency bands can independently report the terminal capabilities corresponding to the frequency bands, which is conducive to improving the degree of freedom of terminal devices.

[0865] Optionally, the sixth terminal capability is reported for a band combination. That is, different band combinations can independently report the terminal capability corresponding to the band combination, which is conducive to improving the degree of freedom of terminal devices.

[0866] Optionally, the sixth terminal capability is reported independently for each frequency band in a band combination. That is, different frequency bands in different band combinations can independently report the terminal capability corresponding to the frequency band. This is conducive to improving the degree of freedom of terminal devices.

[0867] Optionally, the sixth terminal capability is reported independently for each carrier on each frequency band in a band combination. That is, different carriers in different frequency bands in different band combinations can independently report the terminal capability corresponding to the carrier. This helps to increase the degree of freedom of terminal devices.

[0868] Optionally, the sixth terminal capability is reported for a frequency range. That is, different frequency ranges can independently report the terminal capabilities corresponding to the frequency ranges, which is conducive to improving the degree of freedom of terminal devices.

[0869] Optionally, the sixth terminal capability is reported for the terminal device. That is, different terminal devices can independently report the terminal capabilities corresponding to the terminal device itself. This can effectively reduce the signaling overhead of the terminal device reporting the terminal capabilities.

[0870] Optionally, the fifth terminal capability and the sixth terminal capability can be reported together; optionally, the fifth terminal capability and the sixth terminal capability can be reported using the same options, for example, the first frequency band corresponding to the fifth terminal capability and the second frequency band corresponding to the sixth terminal capability are the same frequency band.

[0871] Figure 29 shows a flow chart of a method for determining a DMRS provided by an exemplary embodiment of the present application. The method is executed by a second terminal device or a network device, and the method includes:

[0872] Step 40: Send a first signal.

[0873] The first signal may be a certain signal (eg, a reference signal RS), a certain channel (eg, PDSCH, PDCCH), or information transmitted by a certain channel (eg, DCI transmitted by PDCCH).

[0874] In some embodiments, the first signal is used to respond to the first reporting information. Optionally, the first reporting information may include a target reference signal, which is a reference signal that meets the link quality condition among all candidate reference signals. The first signal is transmitted based on a first DMRS, or the first signal is transmitted based on a second DMRS. The first DMRS may be a first-type DMRS or a second-type DMRS, and the second DMRS may be a second-type DMRS.

[0875] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0876] In some embodiments, the target reference signal is the target reference signal reported in step 360. That is, the target reference signal is a signal that satisfies a link quality condition and is selected from one or more candidate reference signals based on the third link quality and / or the fourth link quality. Alternatively, it can be understood that the link quality corresponding to the target reference signal is evaluated based on the target reference signal and the DMRS corresponding to the target reference signal.

[0877] In some embodiments, the link quality corresponding to the target reference signal is not evaluated based on the DMRS corresponding to the target reference signal. That is, the link quality corresponding to the target reference signal is determined based on the RSRP of the target reference signal, or the link quality corresponding to the target reference signal is determined based on the SINR of the target reference signal.

[0878] In some embodiments, a port of the first signal is quasi co-located (QCL) with a target reference signal, or a DMRS corresponding to the first signal is quasi co-located (QCL) with a target reference signal.

[0879] In some embodiments, the first signal is a PDCCH, or the first signal is a DCI. In this case, the first terminal device receives the first signal based on a first search space, and the first search space is indicated by indication information, and the indication information is sent to the first terminal device by the first network device or the second terminal device. The first search space corresponds to the first CORESET. Optionally, the first CORESET does not correspond to other search spaces other than the first search space. Optionally, the first CORESET may also correspond to other search spaces. In the case where the first CORESET corresponds to other search spaces, the other search spaces may be quasi-co-located (QCL) with other signals.

[0880] Optionally, the indication information may be sent via one or more of RRC signaling, MAC CE signaling, and DCI signaling.

[0881] It is worth noting that the indication information mentioned in this application, including beam indication information, DMRS indication information, first indication information, second indication information, third indication information and other possible indication information, may all be different indication information; or, part of it may be the same indication information and the other part may be different indication information; or, it may be all the same indication information.

[0882] In some embodiments, the first signal is transmitted based on a first DMRS, or the first signal is transmitted based on a second DMRS. The first DMRS may be a first-type DMRS or a second-type DMRS, and the second DMRS may be a second-type DMRS. The first-type DMRS is a DMRS that uses one or more of the same resource elements as control information, and the second-type DMRS is a DMRS that uses different resource elements than control information.

[0883] In some embodiments, the first signal is transmitted based on a default DMRS, where the default DMRS is the first DMRS or the second DMRS. Optionally, the default DMRS is based on the DMRS used by the control channel. For example, if the DMRS used by the control channel is the first DMRS, the default DMRS is the first DMRS; if the DMRS used by the control channel is the second DMRS, the default DMRS is the second DMRS.

[0884] In some embodiments, the first signal is transmitted based on a DMRS indicated by the third indication information, and the DMRS indicated by the third indication information is the first DMRS or the second DMRS. The third indication information is sent by the network device or the second terminal device to the first terminal device. The third indication information is used to indicate that the first signal is transmitted based on the first DMRS or the second DMRS. Optionally, the third indication information indicates that the first signal is transmitted based on the first DMRS. Optionally, the third indication information indicates that the first signal is transmitted based on the second DMRS.

[0885] In some embodiments, the first signal is transmitted based on the DMRS corresponding to the target reference signal. In the case where the first terminal device reports the DMRS corresponding to the target reference signal to the network device or the second terminal device, the network device or the second terminal device can select the DMRS corresponding to the target reference signal to transmit the first signal. Optionally, in the case where the first terminal device reports to the network device or the second terminal device that the DMRS corresponding to the target reference signal is the first DMRS, the network device or the second terminal device chooses to use the first DMRS to transmit the first signal. Optionally, in the case where the first terminal device reports to the network device or the second terminal device that the DMRS corresponding to the target reference signal is the second DMRS, the network device or the second terminal device chooses to use the second DMRS to transmit the first signal.

[0886] Figure 30 shows a flow chart of a method for determining a DMRS provided by an exemplary embodiment of the present application. The method is executed by a second terminal device or a network device, and the method includes:

[0887] Step 41: Send fourth indication information.

[0888] In some embodiments, the fourth indication information is used to indicate one or more of a receiver, a receiver algorithm, and an AI model used when receiving the first signal. Optionally, the fourth indication information includes one or more of the following options:

[0889] First receiver identification;

[0890] First algorithm identifier;

[0891] First model identification;

[0892] A first functionality flag or configuration information of the first functionality.

[0893] Among them, the first receiver identifier is used to indicate the receiver used when receiving the first signal, the first algorithm identifier is used to indicate the receiver algorithm used when receiving the first signal, the first model identifier is used to indicate the AI ​​model used when receiving the first signal, and the first functionality flag or the configuration information of the first function is used to indicate or activate the corresponding function at this time.

[0894] Figure 31 shows a flow chart of a method for determining a DMRS provided by an exemplary embodiment of the present application. The method is executed by a second terminal device or a network device, and the method includes:

[0895] Step 42: Send the fifth indication information.

[0896] In some embodiments, the fifth indication information is used to indicate a DMRS corresponding to the PDSCH scheduled by the first signal, wherein the DMRS corresponding to the PDSCH is the first DMRS or the second DMRS.

[0897] In some embodiments, the first signal includes a first DCI.

[0898] Figure 32 shows a flow chart of a method for determining a DMRS provided by an exemplary embodiment of the present application. The method is executed by a second terminal device or a network device, and the method includes:

[0899] Step 43: Send sixth indication information.

[0900] In some embodiments, the sixth indication information indicates one or more of a receiver, a receiver algorithm, and an AI model for receiving the PDSCH. Optionally, the sixth indication information includes one or more of the following options:

[0901] Second receiver identification;

[0902] Second algorithm identifier;

[0903] Second model identification;

[0904] A secondary functionality flag or configuration information of the secondary functionality.

[0905] Among them, the second receiver identifier is used to indicate the receiver used when receiving PDSCH, the second algorithm identifier is used to indicate the receiver algorithm used when receiving PDSCH, the second model identifier is used to indicate the AI ​​model used when receiving PDSCH, and the second functionality flag or the configuration information of the second function is used to indicate or activate the corresponding function at this time.

[0906] Figure 33 shows a flow chart of a method for determining a DMRS provided by an exemplary embodiment of the present application. The method is executed by a second terminal device or a network device, and the method includes:

[0907] Step 44: Send the seventh instruction information.

[0908] In some embodiments, the seventh indication information is used to indicate a DMRS corresponding to a PUCCH, wherein the PUCCH is used to transmit a second signal corresponding to a PDSCH, and the DMRS corresponding to the PUCCH is the first DMRS or the second DMRS.

[0909] Figure 34 shows a flow chart of a method for determining a DMRS provided by an exemplary embodiment of the present application. The method is executed by a second terminal device or a network device, and the method includes:

[0910] Step 45: Send the eighth indication information.

[0911] In some embodiments, the eighth indication information is used to indicate a DMRS corresponding to a PUSCH scheduled by the first signal, wherein the DMRS corresponding to the PUSCH is the first DMRS or the second DMRS.

[0912] In some embodiments, the first signal includes the second DCI.

[0913] Figure 35 shows a flow chart of a method for determining a DMRS provided by an exemplary embodiment of the present application. The method is executed by a second terminal device or a network device, and the method includes:

[0914] Step 46: Receive terminal capabilities.

[0915] Optionally, a fifth terminal capability is received, where the fifth terminal capability is used to indicate support for use of the first type of DMRS.

[0916] Optionally, a sixth terminal capability is received, where the sixth terminal capability is used to indicate support for determining DMRS.

[0917] Specifically, the implementation of the terminal capability is detailed in step 1010 above.

[0918] In some embodiments, the first type DMRS is a DMRS that uses at least one of the same resource elements as the control information. The second type DMRS is a DMRS that uses different resource elements than the control information.

[0919] In some embodiments, FIG36 shows a flowchart of a method for determining a DMRS provided by an exemplary embodiment of the present application. The method is jointly performed by a first terminal device, a second terminal device, and / or a network device, and the method further includes:

[0920] Step 8: The first terminal device reports terminal capabilities to the second terminal device and / or the network device;

[0921] Specifically, the implementation method of the terminal capability refers to the above step 410.

[0922] Step 9: The first terminal device reports a target reference signal to the second terminal device and / or the network device;

[0923] Optionally, the target reference signal is the target reference signal reported in step 360. That is, the target reference signal is a signal that satisfies a link quality condition and is selected from one or more candidate reference signals based on the third link quality and / or the fourth link quality. Alternatively, it can be understood that the link quality corresponding to the target reference signal is evaluated based on the target reference signal and the DMRS corresponding to the target reference signal.

[0924] Optionally, the link quality corresponding to the target reference signal is not evaluated based on the DMRS corresponding to the target reference signal. That is, the link quality corresponding to the target reference signal is determined based on the RSRP of the target reference signal, or the link quality corresponding to the target reference signal is determined based on the SINR of the target reference signal.

[0925] Step 10: The second terminal device and / or the network device sends a first signal to the first terminal device;

[0926] Specifically, the implementation method of the first signal is detailed in the above step 420.

[0927] Step 11: When the first signal is used to schedule the PDSCH, the first terminal device determines the DMRS corresponding to the PDSCH;

[0928] Specifically, the implementation method of determining the DMRS corresponding to the PDSCH is detailed in the above step 620.

[0929] Step 12: When the first signal is used to schedule the PDSCH, the first terminal device determines a DMRS corresponding to the PUCCH for transmitting the second signal corresponding to the PDSCH;

[0930] Specifically, the implementation method of determining the DMRS corresponding to the PUCCH is detailed in the above step 820.

[0931] Step 13: When the first signal is used to schedule PUSCH, the first terminal device determines the DMRS corresponding to the PUSCH.

[0932] Specifically, the implementation method of determining the DMRS corresponding to the PUSCH is detailed in the above step 920.

[0933] The above steps do not necessarily include all of them, and may include one or more of them.

[0934] It is worth noting that the embodiments shown in Figures 6 to 24 can be freely combined, and the embodiments of the present application do not limit this, and the combination situations will not be listed one by one here.

[0935] FIG37 shows a block diagram of a DMRS determination device provided by an exemplary embodiment of the present application. The device includes:

[0936] The determination module 3710 is configured to determine a DMRS corresponding to a reference signal in a first reference signal group.

[0937] In some embodiments, the reference signals in the first reference signal group and the DMRS corresponding to the reference signals in the first reference signal group are used to evaluate the first link quality. Alternatively, it can be understood that the first link quality is evaluated in combination with the reference signals in the first reference signal group and the DMRS corresponding to the reference signals in the first reference signal group. The reference signals in the first reference signal group are used to evaluate the first link quality, and the DMRS corresponding to the reference signals are also used to evaluate the first link quality. That is, the first link quality is evaluated based on the reference signals in the first reference signal group, or based on the reference signals in the first reference signal group and the corresponding DMRS.

[0938] In some embodiments, the first link quality is the link quality corresponding to a reference signal in the first reference signal group. Alternatively, it can be understood that the first link quality is the link quality of the beam corresponding to the reference signal in the first reference signal group. For example, the first reference signal group is associated with TRP1, and each reference signal in the first reference signal group is associated with a beam of TRP1. The first link quality is used to indicate whether a target event has occurred, such as beam failure.

[0939] In some embodiments, different DMRSs may affect the final transmission performance in a wireless link environment. Possible factors include one or more of the following: different DMRSs occupy different overheads, different interference between different DMRSs and data signals, and different channel estimation performance of different DMRSs. Therefore, when two DMRSs are present, it is necessary to determine which DMRS to use as the DMRS for the assumed control channel.

[0940] In some embodiments, it is determined that the DMRS corresponding to the reference signal in the first reference signal group is a first DMRS or a second DMRS. The DMRS corresponding to the reference signal in the first reference signal group is a first-type DMRS or a second-type DMRS, wherein the first-type DMRS is a DMRS that uses one or more of the same resource elements as control information, and the second-type DMRS is a DMRS that uses different resource elements than the control information. The first DMRS may be the first-type DMRS or the second-type DMRS, and the second DMRS may be the second-type DMRS.

[0941] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0942] In some embodiments, the DMRS corresponding to the reference signal in the first reference signal group is determined to be a first DMRS. Alternatively, the first DMRS corresponding to the reference signal in the first reference signal group is used as a DMRS hypothesis, or the first DMRS corresponding to the reference signal in the first reference signal group is assumed to be used to evaluate link quality. Optionally, the first DMRS is a first-type DMRS.

[0943] In some embodiments, determining that the DMRS corresponding to the reference signal in the first reference signal group is a second DMRS. Alternatively, it can be understood that the second DMRS corresponding to the reference signal in the first reference signal group is used as a DMRS hypothesis, or that the second DMRS corresponding to the reference signal in the first reference signal group is used to evaluate link quality. Optionally, the second DMRS is a second-type DMRS.

[0944] In some embodiments, the reference signals in the first reference signal group are indicated by first indication information.

[0945] Optionally, the apparatus receives first indication information sent by a network device or a second terminal device, where the first indication information is used to indicate or configure a reference signal in a first reference signal group.

[0946] Optionally, the first indication information is further used to indicate parameter information related to the target event. For example, the first indication information is further used to indicate one or more of a first threshold, a first target time, a second threshold, a first number threshold, a third threshold, a first difference threshold, an E1th number threshold, and an E2th number threshold related to the target event.

[0947] Optionally, the first indication information is sent through one or more of RRC signaling, MAC CE signaling, and DCI signaling.

[0948] It's worth noting that communication protocols generally don't specify the relationship between reference signals and beams. However, in actual communications, it can be simply understood as one reference signal corresponding to one beam. Therefore, when evaluating the link quality corresponding to a reference signal, you're actually evaluating the link quality corresponding to the beam.

[0949] The determination module 3710 is further configured to determine a DMRS corresponding to each reference signal in the first reference signal group indicated by the first indication information.

[0950] The determining module 3710 is further configured to determine, when the first indication information indicates that there is a DMRS corresponding to the first reference signal group, that the DMRS corresponding to the first reference signal group is the DMRS corresponding to each reference signal in the first reference signal group.

[0951] The determination module 3710 is further configured to determine a DMRS corresponding to each reference signal in the first reference signal group based on the DMRS used by the control channel.

[0952] The determination module 3710 is further configured to determine that the target DMRS is the DMRS corresponding to each reference signal in the first reference signal group.

[0953] In some embodiments, the first indication information does not indicate a reference signal in the first reference signal group. The reference signals in the first reference signal group are determined based on configuration information of a control channel.

[0954] The determination module 3710 is further configured to determine, when the first reference signal in the first reference signal group is determined based on the TCI state corresponding to the target CORESET in the control channel, that the DMRS corresponding to the target CORESET is the DMRS corresponding to the first reference signal in the first reference signal group.

[0955] The determination module 3710 is further configured to determine a DMRS corresponding to each reference signal in the first reference signal group based on the DMRSs corresponding to multiple CORESETs corresponding to the reference signals in the first reference signal group.

[0956] The determination module 3710 is further configured to determine that the target DMRS is the DMRS corresponding to each reference signal in the first reference signal group.

[0957] In some embodiments, the reference signals in the first reference signal group are determined based on a TCI state corresponding to a target search space in the control channel.

[0958] The determination module 3710 is further configured to determine that the DMRS corresponding to the target search space is the DMRS corresponding to the second reference signal when the second reference signal in the first reference signal group is determined based on the TCI state corresponding to the target search space in the control channel.

[0959] The determination module 3710 is further configured to determine a DMRS corresponding to each reference signal in the first reference signal group based on the DMRSs corresponding to multiple search spaces corresponding to the reference signals in the first reference signal group.

[0960] The determination module 3710 is further configured to determine that the target DMRS is the DMRS corresponding to each reference signal in the first reference signal group.

[0961] Specifically, the implementation manner of the DMRS corresponding to each reference signal in the first reference signal group is determined, as detailed in the above steps 220 to 230.

[0962] The determination module 3710 is further configured to determine the DMRS corresponding to the reference signals in the first reference signal group and the DMRS corresponding to the reference signals in the second reference signal group.

[0963] In some embodiments, the reference signals in the second reference signal group and the DMRS corresponding to the reference signals in the second reference signal group are used to evaluate the second link quality. Alternatively, it can be understood that the second link quality is evaluated in combination with the reference signals in the second reference signal group and the DMRS corresponding to the reference signals in the second reference signal group. The reference signals in the second reference signal group are used to evaluate the second link quality, and the DMRS corresponding to the reference signals are also used to evaluate the second link quality. That is, the second link quality is evaluated based on the reference signals in the second reference signal group, or based on the reference signals in the second reference signal group and the corresponding DMRS.

[0964] In some embodiments, the second link quality is the link quality corresponding to the reference signals in the second reference signal group. Alternatively, it can be understood that the second link quality is the link quality of the beams corresponding to the reference signals in the second reference signal group. For example, the second reference signal group is associated with TRP2, and each reference signal in the second reference signal group is associated with a beam of TRP2.

[0965] The second link quality is used to indicate whether a target event occurs, such as whether a beam failure occurs.

[0966] In some embodiments, the apparatus evaluates the first link quality based on reference signals in the first reference signal group, and / or evaluates the second link quality based on reference signals in the second reference signal group.

[0967] In some embodiments, it is determined that the DMRS corresponding to the reference signals in the second reference signal group is a first DMRS or a second DMRS. The DMRS corresponding to the reference signals in the second reference signal group is a first-type DMRS or a second-type DMRS. The first-type DMRS is a DMRS that uses one or more of the same resource elements as the control information, and the second-type DMRS is a DMRS that uses different resource elements than the control information.

[0968] In some embodiments, the first DMRS is a first type DMRS and the second DMRS is a second type DMRS; or, the first DMRS is a second type DMRS and the second DMRS is a second type DMRS.

[0969] In some embodiments, the DMRS corresponding to the reference signal in the second reference signal group is determined to be a first DMRS. Alternatively, it can be understood that the first DMRS corresponding to the reference signal in the second reference signal group is used as an assumption, or it is assumed that the first DMRS corresponding to the reference signal in the second reference signal group is used to evaluate link quality. Optionally, in this case, the first DMRS is a first-type DMRS.

[0970] In some embodiments, the DMRS corresponding to the reference signals in the second reference signal group is determined to be a second DMRS...

Claims

1. A method for determining a Demodulation Reference Signal (DMRS), characterized in that, The method is executed by a first terminal device, and the method includes: Determining DMRS corresponding to reference signals in a first reference signal group; Wherein, the reference signals in the first reference signal group and the DMRS corresponding to the reference signals in the first reference signal group are used to evaluate a first link quality, the DMRS corresponding to the reference signals in the first reference signal group is a first DMRS or a second DMRS, the first DMRS is a first type of DMRS or a second type of DMRS, and the second DMRS is the second type of DMRS.

2. The method according to claim 1, wherein The determining of the DMRS corresponding to the reference signals in the first reference signal group includes: Determining the DMRS corresponding to each reference signal in the first reference signal group indicated by first indication information; Wherein, the DMRS corresponding to each reference signal in the first reference signal group is the first DMRS or the second DMRS, and the DMRSs corresponding to different reference signals are the same or different.

3. The method according to claim 1, characterized in that The determining of the DMRS corresponding to the reference signals in the first reference signal group includes: When the first indication information indicates the DMRS corresponding to the first reference signal group, determining the DMRS corresponding to the first reference signal group as the DMRS corresponding to each reference signal in the first reference signal group; Wherein, the DMRS corresponding to the first reference signal group is the first DMRS or the second DMRS.

4. The method according to claim 1, wherein The determining of the DMRS corresponding to the reference signals in the first reference signal group includes: When the control channel uses the first DMRS, determining the first DMRS as the DMRS corresponding to each reference signal in the first reference signal group; or, When the control channel uses the second DMRS, determining the second DMRS as the DMRS corresponding to each reference signal in the first reference signal group; or, When the control channel does not use the first DMRS, determining the second DMRS as the DMRS corresponding to each reference signal in the first reference signal group; or, When the control channel does not use the second DMRS, determining the first DMRS as the DMRS corresponding to each reference signal in the first reference signal group.

5. The method according to claim 1, wherein The determining of the DMRS corresponding to the reference signals in the first reference signal group includes: When the first reference signal in the first reference signal group is determined based on a transmission configuration indication (TCI) state corresponding to a target control resource set (CORESET) in a control channel, determining the DMRS corresponding to the target CORESET as the DMRS corresponding to the first reference signal in the first reference signal group; Wherein, the DMRS corresponding to the target CORESET is the first DMRS or the second DMRS.

6. The method according to claim 1, wherein The determining of the DMRS corresponding to the reference signals in the first reference signal group includes: When at least one of the multiple CORESETs corresponding to the reference signals in the first reference signal group corresponds to the first DMRS, determine that the first DMRS is the DMRS corresponding to each reference signal in the first reference signal group; or, When at least one of the multiple CORESETs corresponding to the reference signals in the first reference signal group corresponds to the second DMRS, determine that the second DMRS is the DMRS corresponding to each reference signal in the first reference signal group; or, When all of the multiple CORESETs corresponding to the reference signals in the first reference signal group use the first DMRS, determine that the first DMRS is the DMRS corresponding to each reference signal in the first reference signal group; or, When all of the multiple CORESETs corresponding to the reference signals in the first reference signal group use the second DMRS, determine that the second DMRS is the DMRS corresponding to each reference signal in the first reference signal group.

7. The method according to claim 1, characterized in that, The determination of the DMRS corresponding to the reference signals in the first reference signal group includes: When the second reference signal in the first reference signal group is determined based on the TCI state corresponding to the target search space in the control channel, determine that the DMRS corresponding to the target search space is the DMRS corresponding to the first reference signal in the first reference signal group; wherein, the DMRS corresponding to the target search space is the first DMRS or the second DMRS.

8. The method according to claim 1, characterized in that, The determination of the DMRS corresponding to the reference signals in the first reference signal group includes: When at least one of the multiple search spaces corresponding to the reference signals in the first reference signal group corresponds to the first DMRS, determine that the first DMRS is the DMRS corresponding to each reference signal in the first reference signal group; or, When at least one of the multiple search spaces corresponding to the reference signals in the first reference signal group corresponds to the second DMRS, determine that the second DMRS is the DMRS corresponding to each reference signal in the first reference signal group; or, When all of the multiple search spaces corresponding to the reference signals in the first reference signal group use the first DMRS, determine that the first DMRS is the DMRS corresponding to each reference signal in the first reference signal group; or, When all of the multiple search spaces corresponding to the reference signals in the first reference signal group use the second DMRS, determine that the second DMRS is the DMRS corresponding to each reference signal in the first reference signal group.

9. The method according to claim 1, wherein The determination of the DMRS corresponding to the reference signals in the first reference signal group includes: Determine that the first DMRS is the DMRS corresponding to each reference signal in the first reference signal group; or, Determine that the second DMRS is the DMRS corresponding to each reference signal in the first reference signal group.

10. The method according to any one of claims 1 to 9, characterized in that The method further includes: Determine the DMRS corresponding to the reference signals in the second reference signal group; Among them, the reference signals in the second reference signal group and the DMRS corresponding to the reference signals in the second reference signal group are used to evaluate the second link quality, and the DMRS corresponding to the reference signals in the second reference signal group is the first DMRS or the second DMRS.

11. The method according to claim 10, characterized in that, The determining the DMRS corresponding to the reference signals in the first reference signal group and the determining the DMRS corresponding to the reference signals in the second reference signal group include: When the first indication information indicates the DMRS corresponding to the first reference signal group and the DMRS corresponding to the second reference signal group, determine the DMRS corresponding to the first reference signal group as the DMRS corresponding to each reference signal in the first reference signal group; and determine the DMRS corresponding to the second reference signal group as the DMRS corresponding to each reference signal in the second reference signal group.

12. The method according to claim 11, wherein The first link quality and / or the second link quality are used to indicate whether a target event occurs.

13. The method according to any one of claims 1 to 12, characterized in that The method further includes: Reporting the first terminal capability, where the first terminal capability is used to indicate support for using the first type of DMRS; and / or, Reporting the second terminal capability, where the second terminal capability is used to indicate support for determining the DMRS corresponding to the reference signals in the reference signal group; Among them, the reference signal group includes the first reference signal group and / or the second reference signal group.

14. The method according to any one of claims 1 to 13, characterized in that, The first type of DMRS is a DMRS that uses at least one same resource element as the control information; The second type of DMRS is a DMRS that uses different resource elements from the control information.

15. A method for determining DMRS, characterized in that, The method is executed by a first terminal device, and the method includes: Determine the DMRS corresponding to the candidate reference signals in the third reference signal group; Among them, the candidate reference signals in the third reference signal group and the DMRS corresponding to the candidate reference signals in the third reference signal group are used to evaluate the third link quality, the DMRS corresponding to the candidate reference signals in the third reference signal group is the first DMRS or the second DMRS, the first DMRS is the first type of DMRS or the second type of DMRS, and the second DMRS is the second type of DMRS.

16. The method according to claim 15, wherein The determining the DMRS corresponding to the candidate reference signals in the third reference signal group includes: Determine the first DMRS as the DMRS corresponding to each candidate reference signal in the third reference signal group; or, Determine the second DMRS as the DMRS corresponding to each candidate reference signal in the third reference signal group.

17. The method according to claim 15, wherein The determining the DMRS corresponding to the candidate reference signals in the third reference signal group includes: When the second indication information indicates the DMRS corresponding to the third reference signal group, determine the DMRS corresponding to the third reference signal group as the DMRS corresponding to each candidate reference signal in the third reference signal group; Among them, the DMRS corresponding to the third reference signal group is the first DMRS or the second DMRS.

18. The method according to claim 15, wherein Determining the DMRS corresponding to the candidate reference signals in the third reference signal group includes: Determining the DMRS corresponding to each candidate reference signal in the third reference signal group indicated by the second indication information; Wherein, the DMRS corresponding to each candidate reference signal in the third reference signal group is the first DMRS or the second DMRS, and the DMRSs corresponding to different candidate reference signals may be the same or different.

19. The method according to any one of claims 15 to 18, characterized in that, The method further includes: Determining the DMRS corresponding to the candidate reference signals in the fourth reference signal group; Wherein, the candidate reference signals in the fourth reference signal group and the DMRS corresponding to the candidate reference signals in the fourth reference signal group are used to evaluate the fourth link quality, and the DMRS corresponding to the candidate reference signals in the fourth reference signal group is the first DMRS or the second DMRS.

20. The method according to claim 19, wherein The third link quality and / or the fourth link quality are used to select a target reference signal that meets the link quality condition from at least one candidate reference signal.

21. The method according to claim 20, characterized in that, The method further includes: Reporting the target reference signal; or, Reporting the target reference signal and the DMRS corresponding to the target reference signal; Wherein, the DMRS corresponding to the target reference signal is the first DMRS or the second DMRS.

22. The method according to any one of claims 15 to 21, characterized in that The method further includes: Reporting the third terminal capability, where the third terminal capability is used to indicate support for using the first type of DMRS; and / or, Reporting the fourth terminal capability, where the fourth terminal capability is used to indicate support for determining the DMRS corresponding to the candidate reference signals in the third reference signal group.

23. The method according to any one of claims 15 to 22, characterized in that, The first type of DMRS is a DMRS that uses at least one same resource element as the control information; The second type of DMRS is a DMRS that uses different resource elements from the control information.

24. A method for determining DMRS, characterized in that, The method is performed by a first terminal device, and the method includes: Receiving a first signal, where the first signal is used to respond to a target reference signal, and the target reference signal is a reference signal that meets the link quality condition among all candidate reference signals; Wherein, the first signal is transmitted based on the first DMRS, or the first signal is transmitted based on the second DMRS, the first DMRS is the first type of DMRS or the second type of DMRS, and the second DMRS is the second type of DMRS.

25. The method according to claim 24, wherein The port of the first signal is quasi - co - located with the target reference signal, or the DMRS corresponding to the first signal is quasi - co - located with the target reference signal.

26. The method according to claim 24, wherein The first signal is transmitted based on a default DMRS, and the default DMRS is the first DMRS or the second DMRS.

27. The method according to claim 24, wherein The first signal is transmitted based on the DMRS indicated by the third indication information, and the DMRS indicated by the third indication information is the first DMRS or the second DMRS.

28. The method according to claim 24, wherein The first signal is transmitted based on the DMRS corresponding to the target reference signal.

29. The method according to any one of claims 24 to 28, characterized in that, The method further includes: Receive fourth indication information, where the fourth indication information is used to indicate one or more of a receiver, a receiver algorithm, and an AI model used when receiving the first signal.

30. The method according to claim 29, wherein The fourth indication information includes one or more of the following options: A first receiver identifier, where the first receiver identifier is used to indicate the receiver used when receiving the first signal; A first algorithm identifier, where the first algorithm identifier is used to indicate the receiver algorithm used when receiving the first signal; A first model identifier, where the first model identifier is used to indicate the AI model used when receiving the first signal.

31. The method according to any one of claims 24 to 28, characterized in that, The method further includes: When the first signal is used to schedule a Physical Downlink Shared Channel (PDSCH), determine the Demodulation Reference Signal (DMRS) corresponding to the PDSCH, where the DMRS corresponding to the PDSCH is the first DMRS or the second DMRS.

32. The method according to claim 31, wherein, The first signal includes first Downlink Control Information (DCI).

33. The method according to claim 31, wherein The determining the DMRS corresponding to the PDSCH includes: Determine the DMRS corresponding to the PDSCH as the previously used DMRS, where the previously used DMRS is the first DMRS or the second DMRS, and the previously used DMRS is the DMRS used the last time for the PDSCH or the most recent DMRS used for the PDSCH; or, Determine the DMRS corresponding to the PDSCH as the DMRS indicated by fifth indication information.

34. The method according to claim 31, wherein, The determining the DMRS corresponding to the PDSCH includes: Determine the first DMRS as the DMRS corresponding to the PDSCH; or, Determine the second DMRS as the DMRS corresponding to the PDSCH.

35. The method according to claim 31, wherein The determining the DMRS corresponding to the PDSCH includes: Determine the DMRS corresponding to the first signal as the DMRS corresponding to the PDSCH, where the DMRS corresponding to the first signal is the first DMRS or the second DMRS.

36. The method according to any one of claims 31 to 35, characterized in that, The method further includes: Receive sixth indication information, where the sixth indication information indicates one or more of a receiver, a receiver algorithm, and an AI model used to receive the PDSCH.

37. The method according to claim 36, wherein The sixth indication information includes one or more of the following options: A second receiver identifier, where the second receiver identifier is used to indicate the receiver used when receiving the PDSCH; A second algorithm identifier, where the second algorithm identifier is used to indicate the receiver algorithm used when receiving the PDSCH; A second model identifier, where the second model identifier is used to indicate the AI model used when receiving the PDSCH.

38. The method according to any one of claims 31 to 35, characterized in that The method further includes: Determine the DMRS corresponding to a Physical Uplink Control Channel (PUCCH), where the PUCCH is used to transmit a second signal corresponding to the PDSCH, and the DMRS corresponding to the PUCCH is the first DMRS or the second DMRS.

39. The method according to claim 38, wherein The determining the DMRS corresponding to the PUCCH includes: Determine that the DMRS corresponding to the PUCCH is a previously used DMRS, where the previously used DMRS is the first DMRS or the second DMRS, and the previously used DMRS is the DMRS used by the PUCCH the last time or the DMRS used by the PUCCH most recently; or, Determine that the DMRS corresponding to the PUCCH is the DMRS indicated by the seventh indication information.

40. The method according to claim 38, characterized in that, The determining the DMRS corresponding to the PUCCH includes: Determine that the first DMRS is the DMRS corresponding to the PUCCH; or, Determine that the second DMRS is the DMRS corresponding to the PUCCH.

41. The method according to claim 38, wherein The determining the DMRS corresponding to the PUCCH includes: Determine that the DMRS corresponding to the first signal is the DMRS corresponding to the PUCCH, where the DMRS corresponding to the first signal is the first DMRS or the second DMRS.

42. The method according to any one of claims 24 to 28, characterized in that, The method further includes: When the first signal is used to schedule a physical uplink shared channel (PUSCH), determine the DMRS corresponding to the PUSCH, where the DMRS corresponding to the PUSCH is the first DMRS or the second DMRS.

43. The method according to claim 42, wherein The first signal includes a second DCI.

44. The method according to claim 42, characterized in that, The determining the DMRS corresponding to the PUSCH includes: Determine that the DMRS corresponding to the PUSCH is a previously used DMRS, where the previously used DMRS is the first DMRS or the second DMRS, and the previously used DMRS is the DMRS used by the PUSCH the last time or the DMRS used by the PUSCH most recently; or, Determine that the DMRS corresponding to the PUSCH is the DMRS indicated by the eighth indication information.

45. The method according to claim 42, wherein The determining the DMRS corresponding to the PUSCH includes: Determine that the first DMRS is the DMRS corresponding to the PUSCH; or, Determine that the second DMRS is the DMRS corresponding to the PUSCH.

46. The method according to claim 42, characterized in that, The determining the DMRS corresponding to the PUSCH includes: Determine that the DMRS corresponding to the first signal is the DMRS corresponding to the PUSCH, where the DMRS corresponding to the first signal is the first DMRS or the second DMRS.

47. The method according to any one of claims 24 to 46, characterized in that, The method further includes: Report fifth terminal capabilities, where the fifth terminal capabilities are used to indicate support for using the first type of DMRS; and / or, Report sixth terminal capabilities, where the sixth terminal capabilities are used to indicate support for determining DMRS.

48. The method according to any one of claims 24 to 46, characterized in that, The first type of DMRS is a DMRS that uses at least one same resource element as the control information; The second type of DMRS is a DMRS that uses different resource elements from the control information.

49. A method for determining DMRS, characterized in that, The method is performed by a second terminal device or a network device, and the method includes: Send first indication information, where the first indication information is used to indicate the DMRS corresponding to the reference signal in the first reference signal group. Among them, the reference signals in the first reference signal group and the DMRS corresponding to the reference signals in the first reference signal group are used to evaluate the first link quality. The DMRS corresponding to the reference signals in the first reference signal group is the first DMRS or the second DMRS. The first DMRS is the first type of DMRS or the second type of DMRS, and the second DMRS is the second type of DMRS.

50. The method according to claim 49, characterized in that, The first indication information is used to indicate the DMRS corresponding to each reference signal in the first reference signal group. Among them, the DMRS corresponding to each reference signal in the first reference signal group is the first DMRS or the second DMRS, and the DMRSs corresponding to different reference signals may be the same or different.

51. The method according to claim 49, characterized in that, The first indication information is used to indicate the DMRS corresponding to the first reference signal group. Among them, the DMRS corresponding to the first reference signal group is the first DMRS or the second DMRS.

52. The method according to claims 49 to 51, characterized in that, The first indication information is further used to indicate the DMRS corresponding to the reference signals in the second reference signal group. Among them, the reference signals in the second reference signal group and the DMRS corresponding to the reference signals in the second reference signal group are used to evaluate the second link quality. The DMRS corresponding to the reference signals in the second reference signal group is the first DMRS or the second DMRS.

53. The method according to claim 52, wherein The first link quality and / or the second link quality is used to indicate whether a target event occurs.

54. The method according to any one of claims 49 to 53, characterized in that, The method further includes: Receiving first terminal capability, where the first terminal capability is used to indicate support for using the first type of DMRS; and / or, Receiving second terminal capability, where the second terminal capability is used to indicate support for determining the DMRS corresponding to the reference signals in the reference signal group. Among them, the reference signal group includes the first reference signal group and / or the second reference signal group.

55. The method according to any one of claims 49 to 54, characterized in that, The first type of DMRS is a DMRS that uses at least one same resource element as the control information. The second type of DMRS is a DMRS that uses different resource elements from the control information.

56. A method for determining DMRS, characterized in that, The method is executed by a second terminal device or a network device. The method includes: Sending second indication information, where the second indication information is used to indicate the DMRS corresponding to the candidate reference signals in the third reference signal group. Among them, the candidate reference signals in the third reference signal group and the DMRS corresponding to the candidate reference signals in the third reference signal group are used to evaluate the third link quality. The DMRS corresponding to the candidate reference signals in the third reference signal group is the first DMRS or the second DMRS. The first DMRS is the first type of DMRS or the second type of DMRS, and the second DMRS is the second type of DMRS.

57. The method according to claim 56, wherein The second indication information is used to indicate the DMRS corresponding to the third reference signal group. Among them, the DMRS corresponding to the third reference signal group is the first DMRS or the second DMRS.

58. The method according to claim 56, wherein The second indication information is used to indicate the DMRS corresponding to each candidate reference signal in the third reference signal group. Among them, the DMRS corresponding to each candidate reference signal in the third reference signal group is the first DMRS or the second DMRS, and the DMRSs corresponding to different candidate reference signals are the same or different.

59. The method according to any one of claims 56 to 58, characterized in that, The second indication information is further used to indicate the DMRS corresponding to the candidate reference signal in the fourth reference signal group; Among them, the candidate reference signal in the fourth reference signal group and the DMRS corresponding to the candidate reference signal in the fourth reference signal group are used to evaluate the fourth link quality, and the DMRS corresponding to the candidate reference signal in the fourth reference signal group is the first DMRS or the second DMRS.

60. The method according to claim 59, wherein, The third link quality and / or the fourth link quality are used to select a target reference signal that meets the link quality condition from at least one candidate reference signal.

61. The method according to claim 60, characterized in that, The method further includes: Receiving the target reference signal; or, Receiving the target reference signal and the DMRS corresponding to the target reference signal; Among them, the DMRS corresponding to the target reference signal is the first DMRS or the second DMRS.

62. The method according to any one of claims 56 to 61, characterized in that, The method further includes: Receiving the third terminal capability, where the third terminal capability is used to indicate support for using the first type of DMRS; and / or, Receiving the fourth terminal capability, where the fourth terminal capability is used to indicate support for determining the DMRS corresponding to the candidate reference signal in the third reference signal group.

63. The method according to any one of claims 56 to 62, characterized in that, The first type of DMRS is a DMRS that uses at least one same resource element as the control information; The second type of DMRS is a DMRS that uses different resource elements from the control information.

64. A method for determining DMRS, characterized in that, The method is executed by a second terminal device or a network device, and the method includes: Sending a first signal, where the first signal is used to respond to a target reference signal, and the target reference signal is a reference signal that meets the link quality condition among all candidate reference signals; Among them, the first signal is transmitted based on the first DMRS, or the first signal is transmitted based on the second DMRS, and the first DMRS is the first type of DMRS or the second type of DMRS, and the second DMRS is the second type of DMRS.

65. The method according to claim 64, wherein The port of the first signal is quasi - co - located with the target reference signal, or the DMRS corresponding to the first signal is quasi - co - located with the target reference signal.

66. The method according to claim 64, characterized in that, The first signal is transmitted based on a default DMRS, and the default DMRS is the first DMRS or the second DMRS.

67. The method according to claim 64, wherein The first signal is transmitted based on the DMRS indicated by the third indication information, and the DMRS indicated by the third indication information is the first DMRS or the second DMRS.

68. The method according to claim 64, wherein The first signal is transmitted based on the DMRS corresponding to the target reference signal.

69. The method according to any one of claims 64 to 68, characterized in that, The method further includes: Sending fourth indication information, where the fourth indication information is used to indicate one or more of a receiver, a receiver algorithm, and an AI model used when receiving the first signal.

70. The method according to claim 69, wherein The fourth indication information includes one or more of the following options: A first receiver identifier, where the first receiver identifier is used to indicate the receiver used when receiving the first signal; The first algorithm identifier, which is used to indicate the receiver algorithm used when receiving the first signal; The first model identifier, which is used to indicate the AI model used when receiving the first signal.

71. The method according to any one of claims 64 to 68, characterized in that, The method further includes: Sending fifth indication information, which is used to indicate the DMRS corresponding to the PDSCH scheduled by the first signal; Wherein, the DMRS corresponding to the PDSCH is the first DMRS or the second DMRS.

72. The method according to claim 71, wherein, The first signal includes a first DCI.

73. The method according to claim 72, wherein The method further includes: Sending sixth indication information, which indicates one or more of the receiver, receiver algorithm, and AI model used for receiving the PDSCH.

74. The method according to claim 73, characterized in that, The sixth indication information includes one or more of the following options: The second receiver identifier, which is used to indicate the receiver used when receiving the PDSCH; The second algorithm identifier, which is used to indicate the receiver algorithm used when receiving the PDSCH; The second model identifier, which is used to indicate the AI model used when receiving the PDSCH.

75. The method according to any one of claims 71 to 74, characterized in that, The method further includes: Sending seventh indication information, which is used to indicate the DMRS corresponding to the PUCCH; Wherein, the PUCCH is used to transmit the second signal corresponding to the PDSCH, and the DMRS corresponding to the PUCCH is the first DMRS or the second DMRS.

76. The method according to any one of claims 64 to 68, characterized in that, The method further includes: Sending eighth indication information, which is used to indicate the DMRS corresponding to the PUSCH scheduled by the first signal; Wherein, the DMRS corresponding to the PUSCH is the first DMRS or the second DMRS.

77. The method according to claim 76, characterized in that, The first signal includes a second DCI.

78. The method according to any one of claims 64 to 77, characterized in that, The method further includes: Receiving fifth terminal capability, which is used to indicate support for using the first type of DMRS; and / or, Receiving sixth terminal capability, which is used to indicate support for determining the DMRS.

79. The method according to any one of claims 64 to 78, characterized in that, The first type of DMRS is a DMRS that uses at least one same resource element as the control information; The second type of DMRS is a DMRS that uses different resource elements from the control information.

80. A device for determining DMRS, characterized in that, The apparatus includes: A determination module, configured to determine the DMRS corresponding to the reference signal in the first reference signal group; Wherein, the reference signal in the first reference signal group and the DMRS corresponding to the reference signal in the first reference signal group are used to evaluate the first link quality, the DMRS corresponding to the reference signal in the first reference signal group is the first DMRS or the second DMRS, the first DMRS is the first type of DMRS or the second type of DMRS, and the second DMRS is the second type of DMRS.

81. A determination device for DMRS, characterized in that, The apparatus includes: A determination module, configured to determine the DMRS corresponding to the candidate reference signal in the third reference signal group; Among them, the candidate reference signals in the third reference signal group and the DMRS corresponding to the candidate reference signals in the third reference signal group are used to evaluate the third link quality. The DMRS corresponding to the candidate reference signals in the third reference signal group is the first DMRS or the second DMRS. The first DMRS is the first type of DMRS or the second type of DMRS, and the second DMRS is the second type of DMRS.

82. A determining device for DMRS, characterized in that, The device includes: a receiving module, configured to receive a first signal, where the first signal is used to respond to a target reference signal, and the target reference signal is a reference signal that meets the link quality condition among all candidate reference signals; Among them, the first signal is transmitted based on the first DMRS, or the first signal is transmitted based on the second DMRS. The first DMRS is the first type of DMRS or the second type of DMRS, and the second DMRS is the second type of DMRS.

83. A device for determining DMRS, characterized in that, The device includes: a sending module, configured to send a first indication information, where the first indication information is used to indicate the DMRS corresponding to the reference signals in the first reference signal group; Among them, the reference signals in the first reference signal group and the DMRS corresponding to the reference signals in the first reference signal group are used to evaluate the first link quality. The DMRS corresponding to the reference signals in the first reference signal group is the first DMRS or the second DMRS. The first DMRS is the first type of DMRS or the second type of DMRS, and the second DMRS is the second type of DMRS.

84. A determining device for DMRS, characterized in that, The device includes: a sending module, configured to send a second indication information, where the second indication information is used to indicate the DMRS corresponding to the candidate reference signals in the third reference signal group; Among them, the candidate reference signals in the third reference signal group and the DMRS corresponding to the candidate reference signals in the third reference signal group are used to evaluate the third link quality. The DMRS corresponding to the candidate reference signals in the third reference signal group is the first DMRS or the second DMRS. The first DMRS is the first type of DMRS or the second type of DMRS, and the second DMRS is the second type of DMRS.

85. A determining device for DMRS, characterized in that, The device includes: a sending module, configured to send a first signal, where the first signal is used to respond to a target reference signal, and the target reference signal is a reference signal that meets the link quality condition among all candidate reference signals; Among them, the first signal is transmitted based on the first DMRS, or the first signal is transmitted based on the second DMRS. The first DMRS is the first type of DMRS or the second type of DMRS, and the second DMRS is the second type of DMRS.

86. A communication device, characterized in that, The communication device includes: a processor; a transceiver connected to the processor; a memory for storing executable instructions of the processor; Among them, the processor is configured to load and execute the executable instructions to implement the method for determining DMRS according to any one of claims 1 to 79.

87. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, and the computer program is loaded and executed by a processor to implement the method for determining DMRS according to any one of claims 1 to 79.

88. A computer program product, characterized in that, The computer program product includes computer instructions, the computer instructions are stored in a computer-readable storage medium, and a processor obtains the computer instructions from the computer-readable storage medium, so that the processor loads and executes to implement the method for determining DMRS according to any one of claims 1 to 79.

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