Communication method and device, equipment and storage medium

Abstract

The invention relates to a communication method and device, equipment and a storage medium, and the method comprises the steps: transmitting first information which represents the capability of a terminal; wherein the first information is used for indicating at least one of the following capabilities: the capability that the terminal adopts a set of TCI states for communication under a first condition; under the first condition, the terminal has the capability of adopting a plurality of sets of TCI states for communication. The communication capability supported by the terminal is reported through the terminal, so that the network equipment and the terminal can uniformly use the same TCI state for communication, the multi-TRP communication efficiency based on the uniform TCI state is improved, and the signal quality during communication is improved.

Description

Communication method, device, equipment and storage medium Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to a communication method, apparatus, device, and storage medium. Background Art

[0002] In new radio (NR) networks, especially when the communication frequency band is in frequency range 2, beam-based transmission and reception are required to ensure coverage due to the rapid attenuation of high-frequency channels.

[0003] Typically, the physical downlink control channel (PDCCH) and / or its demodulation reference signal (DMRS), and the physical uplink control channel (PUCCH) and / or its DMRS are used to activate corresponding beams via the medium access control element (MAC CE), while the physical downlink shared channel (PDSCH) and / or its DMRS, and the physical uplink shared channel (PUSCH) and / or its DMRS are used to indicate corresponding beams via downlink control information (DCI) signaling. Beams can be indicated by TCI status or spatial-relation-info.

[0004] In some technologies, to reduce signaling overhead, a unified transmission configuration indication (TCI) state is proposed. TCI can be used to indicate the TCI state used by a terminal to receive the PDCCH and / or its DMRS, the PDSCH and / or its DMRS, or to indicate the TCI state used by a terminal to transmit the PUCCH and / or its DMRS, the PUSCH and / or its DMRS.

[0005] Summary of the Invention

[0006] To overcome the problems existing in the related art, the present disclosure provides a communication method, apparatus, device and storage medium.

[0007] According to a first aspect of an embodiment of the present disclosure, a communication method is provided, which is executed by a terminal, including: sending first information, the first information representing the capability of the terminal; wherein the first information is used to indicate at least one of the following capabilities: the capability of the terminal to communicate using a set of TCI states under a first condition; the capability of the terminal to communicate using multiple sets of TCI states under the first condition.

[0008] According to a second aspect of an embodiment of the present disclosure, a communication method is provided, which is executed by a network device, including: receiving first information, the first information representing the capability of a terminal; wherein the first information is used to indicate at least one of the following capabilities: the capability of the terminal to communicate using a set of TCI states under a first condition; the capability of the terminal to communicate using multiple sets of TCI states under the first condition.

[0009] According to a third aspect of an embodiment of the present disclosure, a communication device is provided, the device including: a sending module for sending first information, the first information representing the capability of a terminal; wherein the first information is used to indicate at least one of the following capabilities: the capability of the terminal to communicate using a set of TCI states under a first condition; the capability of the terminal to communicate using multiple sets of TCI states under the first condition.

[0010] According to the fourth aspect of an embodiment of the present disclosure, a communication device is provided, the device including: a receiving module for receiving first information, the first information indicating the capability of a terminal; wherein the first information is used to indicate at least one of the following capabilities: the capability of the terminal to communicate using a set of TCI states under a first condition; the capability of the terminal to communicate using multiple sets of TCI states under the first condition.

[0011] According to a fifth aspect of an embodiment of the present disclosure, a communication device is provided, characterized in that it includes: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to: execute the first aspect and any one of the methods in the first aspect.

[0012] According to the sixth aspect of an embodiment of the present disclosure, a communication device is provided, characterized in that it includes: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to: execute the second aspect and any one of the methods in the second aspect.

[0013] According to the seventh aspect of the embodiment of the present disclosure, a non-temporary computer-readable storage medium is provided, which, when the instructions in the storage medium are executed by the processor of the terminal, enables the terminal to execute the first aspect and any one of the methods in the first aspect.

[0014] According to an eighth aspect of an embodiment of the present disclosure, a non-temporary computer-readable storage medium is provided. When the instructions in the storage medium are executed by a processor of a network device, the network device is enabled to execute the second aspect and any one of the methods in the second aspect.

[0015] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: by having the terminal report the communication capabilities supported by its own device, the network device and the terminal can uniformly use the same TCI state for communication, thereby improving the efficiency of multi-TRP communication based on the unified TCI state, and improving the signal quality during communication.

[0016] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0018] Fig. 1 is a schematic diagram of a wireless communication system according to an exemplary embodiment.

[0019] Fig. 2 is a flow chart showing a communication method according to an exemplary embodiment.

[0020] Fig. 3 is a flow chart showing another communication method according to an exemplary embodiment.

[0021] Fig. 4 is a flow chart showing another communication method according to an exemplary embodiment.

[0022] Fig. 5 is a flow chart showing yet another communication method according to an exemplary embodiment.

[0023] Fig. 6 is a schematic diagram showing a communication device according to an exemplary embodiment.

[0024] Fig. 7 is a schematic diagram showing another communication device according to an exemplary embodiment.

[0025] Fig. 8 is a schematic diagram showing a communication device according to an exemplary embodiment.

[0026] Fig. 9 is a schematic diagram showing another communication device according to an exemplary embodiment. DETAILED DESCRIPTION

[0027] Exemplary embodiments are described in detail herein, with examples illustrated in the accompanying drawings. When the following description refers to the drawings, identical numerals in different drawings represent identical or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present disclosure.

[0028] The communication method involved in the present disclosure can be applied to the wireless communication system 100 shown in Figure 1. The network system may include a network device 110 and a terminal 120. It will be understood that the wireless communication system shown in Figure 1 is merely for illustrative purposes, and the wireless communication system may also include other network devices, such as core network devices, wireless relay devices, and wireless backhaul devices, which are not shown in Figure 1. The embodiments of the present disclosure do not limit the number of network devices and terminals included in the wireless communication system.

[0029] It can be further understood that the wireless communication system of the embodiment of the present disclosure is a network that provides wireless communication functions. The wireless communication system can adopt different communication technologies, such as code division multiple access (CDMA), wideband code division multiple access (WCDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency-division multiple access (OFDMA), single carrier-frequency division multiple access (SC-FDMA), and carrier sense multiple access with collision avoidance. According to factors such as the capacity, rate, and latency of different networks, the network can be divided into 2G (English: generation) network, 3G network, 4G network or future evolution network, such as the 5th generation wireless communication system (5G) network. The 5G network can also be referred to as NR. For the convenience of description, the present disclosure sometimes refers to the wireless communication network as simply a network.

[0030] Furthermore, the network device 110 involved in the present disclosure may also be referred to as a wireless access network device. The wireless access network device may be: a base station, an evolved node B (eNB), a home base station, an access point (AP) in a wireless fidelity (WIFI) system, a wireless relay node, a wireless backhaul node, a transmission point (TP) or a TRP, etc. It may also be a gNB in ​​an NR system, or it may also be a component or part of a base station. When it is a vehicle-to-everything (V2X) communication system, the network device may also be an on-board device. It should be understood that in the embodiments of the present disclosure, the specific technology and specific device form adopted by the network device are not limited.

[0031] Furthermore, the terminal 120 involved in the present disclosure may also be referred to as a terminal device, user equipment (UE), mobile station (MS), mobile terminal (MT), etc., which is a device that provides voice and / or data connectivity to users. For example, the terminal may be a handheld device with wireless connection function, a vehicle-mounted device, etc. At present, some examples of terminals are: smart phones (mobile phones), pocket personal computers (PPCs), handheld computers, personal digital assistants (PDAs), laptops, tablet computers, wearable devices, or vehicle-mounted devices, etc. In addition, when it is a vehicle-to-everything (V2X) communication system, the terminal device may also be a vehicle-mounted device. It should be understood that the embodiments of the present disclosure do not limit the specific technology and specific device form adopted by the terminal.

[0032] In the embodiments of the present disclosure, the network device 110 and the terminal 120 can use any feasible wireless communication technology to achieve mutual data transmission. The transmission channel corresponding to the transmission of data from the network device 110 to the terminal 120 is called a downlink channel (DL), and the transmission channel corresponding to the transmission of data from the terminal 120 to the network device 110 is called an uplink channel (UL). It is understood that the network device involved in the embodiments of the present disclosure can be a base station. Of course, the network device can also be any other possible network device, and the terminal can be any possible terminal, and this disclosure is not limited thereto.

[0033] In NR, especially when the communication band is in frequency range 2, beam-based transmission and reception are required to ensure coverage due to the rapid attenuation of high-frequency channels.

[0034] In Release (Rel)-16, the beams used for transmission of PDCCH and / or PDCCH DMRS, PDSCH and / or PDSCH DMRS, PUCCH and / or PUCCH DMRS, PUSCH and / or PUSCH DMRS, and / or reference signals are independently indicated. Reference signals may include channel state information reference signals (CSI-RS), sounding reference signals (SRS), positioning reference signals (PRS), and tracking reference signals (TRS). For example, CSI-RS may include CSI-RS for channel state information measurement, CSI-RS for beam measurement, or CSI-RS for pathloss estimation. SRS may include SRS for codebook-based or non-codebook-based channel state information measurement, SRS for beam measurement, SRS for antenna switching, or SRS for positioning measurement.

[0035] Typically, in traditional methods, PDCCH and / or PDCCH DMRS, and PUCCH and / or PUCCH DMRS transmission are activated through MAC CE to activate a beam, while PDSCH and / or PDSCH DMRS, and PUSCH and / or PUSCH DMRS transmission are respectively indicated by DCI signaling to indicate their corresponding beams.

[0036] In order to reduce signaling overhead, Rel-17 proposes the use of a unified TCI state. Currently, the unified TCI state can be a separate indication for uplink and downlink, such as DL TCI state and UL TCI state. The unified TCI state can also be a joint indication for uplink and downlink, such as a joint TCI state. For example, if the network device indicates a DL TCI state for downlink, the DL TCI state can be used for the transmission of the terminal's PDSCH and / or PDSCH's DMRS, PDCCH and / or PDCCH's DMRS, and at least a portion of the CSI-RS. The above-mentioned at least a portion of the CSI-RS can be an aperiodic CSI-RS. For another example, if the network device indicates a UL TCI state for uplink, the UL TCI state can be used for the transmission of the terminal's PUSCH and / or PUSCH's DMRS, PUCCH and / or PUCCH's DMRS, and at least a portion of the SRS. For another example, if the network device indicates a joint TCI state, the joint TCI state may be used for transmission of uplink and downlink channels and / or reference signals at the same time.

[0037] It should be noted that “transmission” in the present disclosure may be considered to include sending and / or receiving.

[0038] It can be understood that the TCI state can be used to indicate which receiving beams the terminal uses when receiving the PDCCH and / or the DMRS of the PDCCH, and / or the PDSCH and / or the DMRS of the PDSCH. For example, the receiving beam corresponding to the same transmitting beam as the synchronization signal block (synchronization signal and physical broadcast channel block, SSB) or CSI-RS sent by the terminal to the network device. That is, the DMRS of the PDCCH and / or PDCCH, and / or the DMRS of the PDSCH and / or PDSCH are quasi-co-located with the SSB or CSI-RS. TCI can also be used to indicate which transmitting beams the terminal uses when sending the PUCCH and / or the DMRS of the PUCCH, and / or the DMRS of the PUSCH and / or PUSCH. For example, the transmitting beam corresponding to the receiving beam that is the same as the SSB or CSI-RS sent by the terminal to the network device, or the transmitting beam that is the same as the SRS sent by the terminal. That is, the PUCCH and / or PUCCH DMRS, and / or PUSCH and / or PUSCH DMRS, are quasi co-located with the SSB, CSI-RS or SRS. The beam refers to quasi co-location (QCL) type D.

[0039] The beams involved above may be indicated by TCI status or spatialrelationinfo. The TCI status corresponding to the PDCCH includes the TCI status corresponding to the PDCCH and / or the DMRS of the PDCCH, that is, the TCI status is used for receiving the PDCCH and / or the DMRS of the PDCCH. Similarly, the TCI state corresponding to PDSCH includes the TCI state corresponding to PDSCH and / or PDSCH's DMRS, that is, the TCI state is used for the reception of PDSCH and / or PDSCH's DMRS; the TCI state or spatialrelationinfo corresponding to PUCCH includes the TCI state or spatialrelationinfo corresponding to PUCCH and / or PUCCH's DMRS, that is, the TCI state or spatialrelationinfo is used for the transmission of PUCCH and / or PUCCH's DMRS; the TCI state or spatialrelationinfo corresponding to PUSCH includes the TCI state or spatialrelationinfo corresponding to PUSCH and / or PUSCH's DMRS, that is, the TCI state or spatialrelationinfo is used for the transmission of PUSCH and / or PUSCH's DMRS.

[0040] However, Rel-17 currently only considers unified TCI states for single-TRPs. That is, only one set of unified TCI states is considered for beam indication. For example, this may include UL TCI states, DL TCI states, and / or joint TCI states. When multiple (M) TRPs provide transmission services to a terminal, one or more sets of TCI states are configured accordingly. In this case, how to indicate which sets of unified TCI states to use is currently undecided.

[0041] For the case of M-TRP, a single (S) DCI method is included. Among the corresponding PDCCH and / or PDCCH DMRS, PDSCH and / or PDSCH DMRS, PUCCH and / or PUCCH DMRS, and PUSCH and / or PUSCH DMRS, if there is at least one channel and / or the DMRS of the channel configured with M-TRP, the TCI state can be indicated by the S-DCI configured by the network device. Assume that there are 2 TRPs and the S-DCI indicates the TCI state of the 2 TRPs. For example, 2 sets of joint TCI states are indicated, and / or 2 sets of DL TCI states are indicated, and / or 2 sets of UL TCI states are indicated. In this case, the terminal can directly use the indicated 2 sets of TCI states for communication. For example, the S-DCI indicates the TCI state of 1 TRP, such as indicating 1 set of joint TCI states, and / or indicating 1 set of DL TCI states, and / or indicating 1 set of UL TCI states. At this time, it is still undecided how the terminal should use the TCI state to communicate.

[0042] That is, in an M-TRP-based S-DCI scenario, a single MAC CE or DCI signaling can indicate multiple TCI states. However, if only one TCI state is indicated, which TCI state or states should the terminal and network device use for communication? In other words, whether the terminal should switch to S-TRP communication (i.e., communicate based on a single TCI state) or continue M-TRP communication (i.e., communicate based on multiple TCI states) is currently undecided.

[0043] Therefore, the present disclosure provides a communication method, apparatus, device and storage medium, by which the terminal reports the communication capabilities supported by its own device, so that the network device and the terminal can uniformly use the same TCI state for communication, thereby improving the efficiency of multi-TRP communication based on the unified TCI state, and improving the signal quality during communication.

[0044] FIG2 is a flow chart of a communication method according to an exemplary embodiment. As shown in FIG2 , the method is executed by a terminal and may include the following steps:

[0045] In step S11, first information is sent.

[0046] In some embodiments, a terminal may send first information. The first information may indicate a capability of the terminal. The first information may be used to indicate at least one of the following capabilities: the ability of the terminal to communicate using one set of TCI states under a first condition; or the ability of the terminal to communicate using multiple sets of TCI states under the first condition.

[0047] For example, the terminal sends first information, and the first information may indicate the terminal's ability to communicate using a set of TCI states under a first condition.

[0048] For another example, the terminal sends first information, and the first information may indicate the terminal's ability to communicate using multiple sets of TCI states under a first condition.

[0049] For another example, the terminal sends first information, which may indicate the terminal's ability to communicate using a set of TCI states under a first condition, and the first information may also indicate the terminal's ability to communicate using multiple sets of TCI states under the first condition.

[0050] In some embodiments, the first information may be used only to indicate the terminal's ability to communicate using a set of TCI states under a first condition. In this case, the terminal may use the first information to indicate that it supports communication using a set of TCI states under the first condition, that is, to indicate that the terminal supports the ability to communicate using a set of TCI states under the first condition. The terminal may also use the first information to indicate that it does not support communication using a set of TCI states under the first condition, that is, to indicate that the terminal supports the ability to communicate using multiple sets of TCI states under the first condition.

[0051] In some embodiments, the first information may be used only to indicate the terminal's ability to communicate using multiple TCI states under a first condition. In this case, the terminal may use the first information to indicate that it supports communication using multiple TCI states under the first condition, that is, to indicate that the terminal supports the ability to communicate using multiple TCI states under the first condition. The terminal may also use the first information to indicate that it does not support communication using multiple TCI states under the first condition, that is, to indicate that the terminal supports the ability to communicate using a single TCI state under the first condition.

[0052] In some embodiments, the first information may also be referred to as capability information, terminal capability information, etc. This disclosure does not limit the name of the first information.

[0053] In some embodiments, under the first condition, the terminal supporting communication using a set of TCI states can be considered as the terminal performing S-TRP communication. Of course, if the terminal is originally in M-TRP communication, it can be understood that the terminal switches to S-TRP communication.

[0054] In some embodiments, under the first condition, the terminal supporting communication using multiple TCI states can be considered as the terminal performing M-TRP communication. Of course, if the terminal is originally in M-TRP communication, it can be understood that the terminal continues to maintain M-TRP communication.

[0055] It can be understood that the terminal continuing to maintain M-TRP communication can also be described as the terminal maintaining M-TRP communication. The above two description methods have the same meaning in this disclosure and can be used interchangeably. This disclosure does not limit them.

[0056] In some embodiments, before S11, the terminal may further include the following steps:

[0057] In step S12, first information is determined.

[0058] In some embodiments, the terminal may determine the first information.

[0059] For example, the terminal may determine the capabilities supported by itself and indicate the capabilities supported by itself through the first information.

[0060] For example, the terminal determines its ability to communicate using one set of TCI states under a first condition. For another example, the terminal determines its ability to communicate using multiple sets of TCI states under a first condition. For another example, the terminal determines its ability to communicate using one set of TCI states under a first condition, and its ability to communicate using multiple sets of TCI states under a first condition.

[0061] The present disclosure enables the terminal to report the communication capabilities supported by its own device, so that the network device and the terminal can uniformly use the same TCI state for communication, thereby improving the efficiency of multi-TRP communication based on the unified TCI state and improving the signal quality during communication.

[0062] In the communication method provided by the embodiments of the present disclosure, FIG3 is a flow chart of another communication method according to an exemplary embodiment. At least one channel and / or signal sent and / or received by the terminal is configured to adopt a multi-TRP communication method based on S-DCI indication. As shown in FIG3, the method may further include the following steps:

[0063] In step S21, second information is received.

[0064] In some embodiments, the terminal may receive second information. The second information may be used to indicate a unified TCI state. The first condition is that the unified TCI state indicated by the second information is a set of unified TCI states.

[0065] It will be appreciated that the unified TCI states in various embodiments of the present disclosure may also be referred to as indicated (or unified) TCI states. A unified TCI state may include a joint TCI state, or a unified TCI state may include a DL TCI state and / or a UL TCI state. Of course, multiple unified TCI states may include multiple joint TCI states, or multiple DL TCI states and / or multiple UL TCI states.

[0066] For example, the terminal may be configured to use a multi-TRP communication method indicated by S-DCI to send and / or receive at least one channel and / or signal.

[0067] For example, the terminal is configured to use the multi-TRP communication method indicated by the S-DCI to send at least one channel. For another example, the terminal is configured to use the multi-TRP communication method indicated by the S-DCI to send at least one signal. For another example, the terminal is configured to use the multi-TRP communication method indicated by the S-DCI to receive at least one channel. For another example, the terminal is configured to use the multi-TRP communication method indicated by the S-DCI to receive at least one signal.

[0068] In the above situation, the terminal may receive second information. The second information is used to indicate the unified TCI state. The second information may include DCI. For example, the second information may be indicated via a TCI field in the DCI, that is, the TCI field is used to indicate the unified TCI state. For example, the TCI field may be used to indicate whether the PDSCH adopts one or multiple unified TCI states; alternatively, the TCI field may be used to indicate the SRS resource set corresponding to the PUSCH.

[0069] In some embodiments, the first condition may be that the second information received by the terminal indicates a unified TCI state. That is, if the terminal is configured to use a multi-TRP communication method indicated by an S-DCI and transmit and / or receive at least one channel and / or signal, and the second information is received and indicates a unified TCI state, then the terminal is considered to have met the first condition.

[0070] For example, for a terminal configured with an S-DCI-based M-TRP scheme, when the second information received by the terminal indicates only one joint TCI state, or the second information indicates only one UL TCI state and / or one DL TCI state, the terminal can be considered to meet the first condition.

[0071] The present disclosure provides a possible first condition for a terminal to report the communication capabilities supported by the terminal under the first condition. This allows the network device and the terminal to uniformly use the same TCI state for communication under the first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state and improving the signal quality during communication.

[0072] In the communication method provided by the embodiment of the present disclosure, the method further includes: determining multiple sets of TCI states. At least one of the following methods is used to determine whether the terminal uses one set of TCI states for communication or multiple sets of TCI states for communication: receiving third information, the third information is used to indicate that the terminal uses one set of TCI states for communication under the first condition, or uses multiple sets of TCI states for communication; based on predefined rules, determining whether the terminal uses one set of TCI states for communication under the first condition, or uses multiple sets of TCI states for communication. Among them, using one set of TCI states for communication means using a set of unified TCI states indicated by the second information for communication; using multiple sets of TCI states for communication means using a set of unified TCI states indicated by the second information to update multiple sets of TCI states, and communicating based on the updated multiple sets of TCI states.

[0073] In some embodiments, the terminal may determine multiple sets of TCI states.

[0074] For example, a network device may be configured with multiple TCI states. The terminal may determine the multiple TCI states based on information sent by the network device indicating the multiple TCI states. Alternatively, a predefined rule may predefine multiple TCI states. The terminal may determine the multiple TCI states based on the predefined rule.

[0075] It is understandable that the terminal may determine multiple sets of TCI states in advance, for example, before receiving the second information, it may have determined multiple sets of TCI states and perform M-TRP communication based on the multiple sets of TCI states.

[0076] In some embodiments, a terminal may receive third information. The third information is used to instruct the terminal to use one set of TCI states for communication under a first condition, or to use multiple sets of TCI states for communication. Based on the indication of the third information, the terminal may determine whether the terminal uses one set of TCI states for communication under the first condition, or to use multiple sets of TCI states for communication.

[0077] For example, a terminal receives third information. This third information instructs the terminal to perform S-TRP communication under the first condition. Of course, if the terminal was originally in M-TRP communication, this can be understood as the terminal switching to S-TRP communication. For another example, a terminal receives third information. This third information instructs the terminal to perform M-TRP communication under the first condition. It can be understood that if the terminal was originally in M-TRP communication, this can be understood as the terminal continuing to maintain M-TRP communication.

[0078] It is understandable that, for different channels and / or signals, the same third information can be used to instruct the terminal to perform S-TRP communication or M-TRP communication under the first condition. Alternatively, for different channels and / or signals, different third information can be used to instruct the terminal to perform S-TRP communication or M-TRP communication under the first condition. The third information mentioned in each embodiment of the present disclosure can be carried by at least one of RRC, MAC CE and DCI.

[0079] In some embodiments, the terminal may determine, based on a predefined rule, that the terminal uses one set of TCI states for communication under the first condition, or uses multiple sets of TCI states for communication.

[0080] For example, the terminal may determine, based on a predefined rule, that the terminal performs S-TRP communication under the first condition. Of course, if the terminal is originally in M-TRP communication, it can be understood that the terminal switches to S-TRP communication.

[0081] For another example, the terminal may determine, based on a predefined rule, that the terminal performs M-TRP communication under the first condition. It is understood that if the terminal is originally in M-TRP communication, it can be understood that the terminal continues to maintain M-TRP communication.

[0082] Of course, for the case where the terminal originally supports M-TRP communication. If the terminal only supports the ability to perform S-TRP communication under the first condition. The predefined rule may include the terminal switching to S-TRP communication under the first condition. Or, if the terminal only supports the ability to perform M-TRP communication under the first condition. The predefined rule may include the terminal maintaining M-TRP communication under the first condition. For the terminal that supports both the ability to perform S-TRP communication under the first condition and the ability to perform M-TRP communication under the first condition. The predefined rule may determine that the terminal switches to S-TRP communication under the first condition; or the predefined rule may determine that the terminal maintains M-TRP communication under the first condition.

[0083] It is understandable that, for different channels and / or signals, the same predefined rules may be used to determine whether the terminal performs S-TRP communication or M-TRP communication under the first condition. Alternatively, for different channels and / or signals, different predefined rules may be used to determine whether the terminal performs S-TRP communication or M-TRP communication under the first condition, respectively, and this disclosure is not limited thereto.

[0084] In some embodiments, the use of a set of TCI states for communication as described in various embodiments of the present disclosure may be expressed as the use of a unified set of TCI states indicated by the second information. For example, if the terminal determines to use S-TRP communication, the terminal uses the set of TCI states indicated by the second information for S-TRP communication.

[0085] In some embodiments, the use of multiple TCI states for communication involved in various embodiments of the present disclosure can be represented by using a unified set of TCI states indicated by second information to update multiple TCI states, and then communicating based on the updated multiple TCI states. For example, if a terminal determines to use M-TRP communication, in this case, the terminal uses the set of TCI states indicated by the second information to update the multiple TCI states that have been determined. For example, a set of TCI states from the multiple TCI states is updated. The terminal then performs S-TRP communication based on the updated multiple TCI states.

[0086] The present disclosure provides multiple communication modes for terminals under the first condition, so that network equipment and terminals can uniformly use the same TCI state to communicate under the first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state and improving the signal quality during communication.

[0087] In the communication method provided by the embodiment of the present disclosure, a set of TCI states is used for communication, which may include: for any channel and / or signal, a set of TCI states is used for communication.

[0088] In some embodiments, the terminal uses a set of TCI states for communication. It can be that under a first condition, for any channel and / or signal, the terminal uses a set of TCI states for communication.

[0089] For example, under the first condition, for any channel, the terminal uses a set of TCI states for communication.

[0090] For example, for any one or more of PDCCH, PUCCH, PDSCH, and PUSCH, the terminal uses a set of TCI states for communication.

[0091] For another example, under the first condition, for any signal, the terminal uses a set of TCI states for communication.

[0092] For example, for any one or more of the DMRS corresponding to the PDCCH, the DMRS corresponding to the PUCCH, the DMRS corresponding to the PDSCH, the DMRS corresponding to the PUSCH, the CSI-RS, the SRS, the PRS, and the TRS, the terminal uses a set of TCI states for communication.

[0093] It can be understood that for communication using a set of TCI states, it can be considered that for any channel and / or signal, even if it is predetermined to be based on M-TRP communication through radio resource control (RRC), MAC CE, DCI or predefined rules, under the first condition, the terminal will switch to S-TRP-based communication when sending and receiving the corresponding channel and / or signal.

[0094] The present disclosure provides a specific implementation method for communicating using a set of TCI states, so that network devices and terminals can uniformly use the same TCI state for communication under the first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state and improving the signal quality during communication.

[0095] In the communication method provided by the embodiment of the present disclosure, any channel and / or signal includes a first channel and / or a first signal. The first channel and / or the first signal is configured to adopt a multi-TRP transmission method based on an S-DCI indication. Using multiple sets of TCI states for communication may include: under a first condition, the first channel and / or the first signal uses multiple sets of TCI states for communication.

[0096] In some embodiments, any channel and / or signal may include a first channel and / or a first signal. The first channel and / or the first signal is configured to adopt a multi-TRP transmission method based on an S-DCI indication. In this case, the terminal adopts multiple sets of TCI states for communication, and it may be that under the first condition, the terminal continues to maintain the first channel and / or the first signal using multiple sets of TCI states for communication.

[0097] For example, for the first channel configured to adopt a multi-TRP transmission method based on S-DCI indication, under the first condition, the terminal continues to maintain the first channel using multiple sets of TCI states for communication.

[0098] For example, for any one or more of PDCCH, PUCCH, PDSCH, and PUSCH configured to adopt a multi-TRP transmission method based on S-DCI indication, under the first condition, the terminal continues to use multiple sets of TCI states for communication.

[0099] For another example, for a first signal configured to adopt a multi-TRP transmission method based on an S-DCI indication, under a first condition, the terminal continues to maintain the first signal using multiple sets of TCI states for communication.

[0100] For example, for any one or more of the DMRS corresponding to PDCCH, DMRS corresponding to PUCCH, DMRS corresponding to PDSCH, DMRS corresponding to PUSCH, CSI-RS, SRS, PRS, and TRS configured to adopt a multi-TRP transmission method based on S-DCI indication, under the first condition, the terminal continues to use multiple sets of TCI states for communication.

[0101] It can be understood that for communication using multiple TCI states, it can be considered that for any channel and / or signal, if communication is originally determined to be based on M-TRP through RRC, MAC CE, DCI, or predefined rules, then under the first condition, the terminal continues to maintain M-TRP communication. For other channels and / or signals not configured to use the multi-TRP transmission method, the terminal continues to maintain the original S-TRP communication. In this case, for the set of TCI states indicated by the second information, one of the multiple TCI states previously determined by the terminal can be updated accordingly. For example, the terminal originally determined two sets of TCI states, such as a first set of TCI states and a second set of TCI states. The second indication information indicates a third set of TCI states, and the third set of TCI states is an update of the first set of TCI states. If the terminal determines to communicate using multiple TCI states, the terminal can update the first set of TCI states based on the third set of TCI states indicated by the received second information. That is, the two new sets of TCI states determined by the terminal include the third set of TCI states and the second set of TCI states. It will be appreciated that in this disclosure, among the multiple sets of TCI states, the TCI states that are updated using the third set of TCI states indicated by the second information are referred to as the first set of TCI states. The TCI states that have not been updated can be referred to as the second set of TCI states. The terminal updates the first set of TCI states based on the third set of TCI states indicated by the second information, while the second set of TCI states remains unchanged.

[0102] For example, for some control resource sets (CORESETs), multiple TCI state communications are configured through RRC. Then, for the PDCCHs corresponding to these CORESETs, under the first condition, the terminal may determine to continue to maintain M-TRP communication.

[0103] For another example, if multiple search space sets are configured as a link relationship, then for the PDCCHs corresponding to the multiple search space sets, under the first condition, the terminal can determine to continue to maintain M-TRP communication. That is, the TCI state corresponding to the CORESET corresponding to each search space set is used to detect the PDCCH candidates on the multiple search space sets respectively. Among them, the link relationship can be expressed as the above-mentioned multiple search space sets being used for PDCCH repetition. PDCCH repetition means that the same PDCCH candidate identifiers are included in multiple search space sets, and the DCI information sent by multiple identical PDCCH candidate identifiers is the same. For example, two search space sets are configured with a link relationship, and the terminal originally determines two sets of TCI states including a first set of TCI states and a second set of TCI states. The first search space set corresponds to the first set of TCI states for detection, and the second search space set corresponds to the second set of TCI states for detection. If the second information only indicates the third set of TCI states, and the third set of TCI states is an update to the first set of TCI states. Then, when the terminal continues to maintain M-TRP communication, the terminal detects PDCCH candidates on the first search space set based on the third set of TCI states, and detects PDCCH candidates on the second search space set based on the second set of TCI states.

[0104] A PDCCH candidate can be understood as a transmission resource corresponding to a PDCCH, and a CORESET can correspond to one or more PDCCH candidates. A network device and / or terminal will send and / or receive a PDCCH based on one of the PDCCH candidates.

[0105] For another example, for some PUCCHs and at least one of the DMRSs corresponding to the PUCCHs, multiple TCI state communications may be configured through RRC. Then, for these PUCCHs and at least one of the DMRSs corresponding to the PUCCHs, under the first condition, the terminal may determine to continue to maintain M-TRP communication.

[0106] For another example, for some PDSCHs, PUSCHs, DMRSs corresponding to PDSCHs, and at least one of DMRSs corresponding to PUSCHs, DCI may indicate the use of multiple TCI state communications. For at least one of these PDSCHs, PUSCHs, DMRSs corresponding to PDSCHs, and DMRSs corresponding to PUSCHs, under the first condition, the terminal may determine to continue M-TRP communication.

[0107] For another example, for at least one of some PDSCHs, PUSCHs, DMRSs corresponding to PDSCHs, and DMRSs corresponding to PUSCHs, it may be determined based on predefined rules to adopt multiple sets of TCI state communications. For at least one of these PDSCHs, PUSCHs, DMRSs corresponding to PDSCHs, and DMRSs corresponding to PUSCHs, under a first condition, the terminal may determine to continue to maintain M-TRP communication.

[0108] For another example, for some channels and / or signals, it may not be indicated or determined based on default rules to use multiple sets of TCI state communications. Then, for these channels and / or signals, under the first condition, the terminal may determine to continue to maintain S-TRP communication.

[0109] In some embodiments, the identifier may be an identity (ID) or an index.

[0110] The present disclosure provides a specific implementation method for communicating using multiple sets of TCI states, so that network devices and terminals can uniformly use the same TCI state for communication under the first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state and improving the signal quality during communication.

[0111] In the communication method provided by the embodiment of the present disclosure, the channel and / or signal includes at least one of the following: PDCCH; DMRS corresponding to PDCCH; PUCCH; DMRS corresponding to PUCCH; PDSCH; DMRS corresponding to PDSCH; PUSCH; DMRS corresponding to PUSCH; SRS; CSI-RS; PRS; TRS.

[0112] In some embodiments, the channel may include a PDCCH.

[0113] In some embodiments, the channel may include a PDSCH.

[0114] In some embodiments, the channel may include a PUCCH.

[0115] In some embodiments, the channel may include a PUSCH.

[0116] In some embodiments, the channel may also include: PDCCH, PDSCH; PDCCH, PUCCH; PDCCH, PUSCH; PDSCH, PUCCH; PDSCH, PUSCH; PUCCH, PUSCH; PDCCH, PDSCH, PUCCH; PDCCH, PDSCH, PUSCH; PDCCH, PUCCH, PUSCH; PDCCH, PDSCH, PUCCH, PUSCH; PDCCH, PDSCH, PUCCH, PUSCH.

[0117] In some embodiments, the signal may include a DMRS corresponding to the PDCCH.

[0118] In some embodiments, the signal may include a DMRS corresponding to the PDSCH.

[0119] In some embodiments, the signal may include a DMRS corresponding to the PUCCH.

[0120] In some embodiments, the signal may include a DMRS corresponding to the PUSCH.

[0121] In some embodiments, the signal may include SRS.

[0122] In some embodiments, the signal may include a CSI-RS.

[0123] In some embodiments, the signal may include a PRS.

[0124] In some embodiments, the signal may include TRS.

[0125] In some embodiments, the signal may further include: DMRS and SRS corresponding to the PDCCH; DMRS, SRS, and CSI-RS corresponding to the PDCCH; DMRS corresponding to the PDCCH and DMRS, SRS, and CSI-RS corresponding to the PDSCH; DMRS, SRS, and CSI-RS corresponding to the PDCCH, PRS, and TRS corresponding to the PDCCH; DMRS corresponding to the PDCCH and DMRS, SRS, and CSI-RS corresponding to the PUSCH; DMRS corresponding to the PDCCH and DMRS, SRS, and CSI-RS corresponding to the PDSCH, PRS, and TRS corresponding to the PUSCH; DMRS corresponding to the PDCCH and DMRS, SRS, and CSI-RS corresponding to the PDSCH, PRS, and TRS corresponding to the PUSCH. It will be understood that the signal may further include any two, three, four, five, six, seven, or eight of the above-mentioned items, which are not listed one by one in this disclosure for the convenience of description.

[0126] The present disclosure provides a variety of channel and signal implementation methods so that network devices and terminals can uniformly use the same TCI state to send and / or receive corresponding channels and / or signals under the first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state and improving the signal quality during communication.

[0127] In the communication method provided in the embodiments of the present disclosure, any channel and / or signal includes a PDCCH, the PDCCH corresponds to a first CORESET, and the first CORESET is configured to communicate using multiple sets of TCI states. Under a first condition, using a set of TCI states for communication for any channel and / or signal may include: under the first condition, using a set of TCI states for communication for the PDCCH corresponding to the first CORESET; or, under the first condition, not detecting PDCCH candidates on the first CORESET.

[0128] In some embodiments, any channel and / or signal may include a PDCCH. The PDCCH corresponds to a first CORESET. It will be appreciated that the PDCCH received by the terminal may be transmitted via resources on the first CORESET. The first CORESET is configured to communicate using multiple sets of TCI states. In this case, under a first condition, the terminal may communicate using a single set of TCI states for the PDCCH corresponding to the first CORESET.

[0129] For example, some CORESETs are configured via RRC to communicate using multiple TCI states. Under the first condition, the terminal uses one set of TCI states for communication, and can switch to S-TRP communication for the PDCCHs corresponding to these CORESETs.

[0130] In some embodiments, any channel and / or signal may include a PDCCH. The PDCCH corresponds to a first CORESET. It will be appreciated that the PDCCH received by the terminal may be transmitted via resources on the first CORESET. The first CORESET is configured to communicate using multiple TCI states. In this case, under a first condition, the terminal may not detect PDCCH candidates on the first CORESET.

[0131] For example, some CORESETs are configured via RRC to use multiple TCI states for communication. Under the first condition, the terminal may not detect PDCCH candidates on these CORESETs.

[0132] The present disclosure provides an implementation method for using a set of TCI states for communication on PDCCH, so that network equipment and terminals can uniformly use the same TCI state to send and / or receive corresponding channels and / or signals under a first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state, and improving the signal quality during communication.

[0133] In the communication method provided by the embodiments of the present disclosure, any channel and / or signal includes a PDCCH, the PDCCH includes PDCCH candidates on multiple search space sets, and the multiple search space sets are configured as a link relationship. Under a first condition, for any channel and / or signal, a set of TCI states are used for communication, which may include: under the first condition, detecting PDCCH candidates on a search space set using a set of TCI states indicated by second information in multiple search space sets; or, under the first condition, not detecting PDCCH candidates on multiple search space sets.

[0134] In some embodiments, any channel and / or signal may include a PDCCH. The PDCCH may include PDCCH candidates from multiple search space sets. The multiple search space sets are configured as linked. In this case, under a first condition, the terminal may detect PDCCH candidates from a search space set with a set of TCI states indicated by the second information in the multiple search space sets.

[0135] For example, multiple search space sets are configured with a link relationship. Then, for the PDCCH corresponding to the multiple search space sets, under the first condition, the terminal adopts a set of TCI states for communication. It can be that the terminal only uses a set of TCI states indicated by the second information to detect the PDCCH candidates on the search space set corresponding to the indicated set of TCI states. For example, two search space sets are configured with a link relationship, and the terminal originally determined two sets of TCI states including a first set of TCI states and a second set of TCI states. The first search space set corresponds to the first set of TCI states for detection, and the second search space set corresponds to the second set of TCI states for detection. If the second information only indicates a third set of TCI states, and the third set of TCI states is an update of the first set of TCI states, then the terminal detects the PDCCH candidates on the first search space set based on the third set of TCI states.

[0136] In some embodiments, any channel and / or signal may include a PDCCH. The PDCCH may include PDCCH candidates on multiple search space sets. The multiple search space sets are configured as linked relationships. In this case, under a first condition, the terminal may not detect PDCCH candidates on the multiple search space sets.

[0137] For example, multiple search space sets are configured with a link relationship. Then, for the PDCCH corresponding to the multiple search space sets, under the first condition, the terminal may not detect the PDCCH candidates on the above multiple search space sets. For example, two search space sets are configured with a link relationship, and the terminal originally determined two sets of TCI states including a first set of TCI states and a second set of TCI states. The first search space set corresponds to the first set of TCI states for detection, and the second search space set corresponds to the second set of TCI states for detection. If the second information only indicates the third set of TCI states, and the third set of TCI states is an update of the first set of TCI states, then the terminal does not need to detect the PDCCH candidates on the first search space set, and does not detect the PDCCH candidates on the second search space set.

[0138] The present disclosure provides an implementation method for using a set of TCI states for communication on PDCCH, so that network equipment and terminals can uniformly use the same TCI state to send and / or receive corresponding channels and / or signals under a first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state, and improving the signal quality during communication.

[0139] In the communication method provided in the embodiments of the present disclosure, any channel and / or signal includes a second channel and / or second signal, and the second channel and / or second signal includes at least one of a PDSCH, a PUSCH, a DMRS corresponding to the PDSCH, and a DMRS corresponding to the PUSCH. Under a first condition, the terminal does not expect the DCI indication field to indicate that the second channel and / or second signal is transmitted and / or received based on multiple sets of TCI states.

[0140] It can be understood that for not expecting the DCI indication field to indicate the sending and / or receiving of the second channel and / or second signal based on multiple sets of TCI states, one situation may be that the DCI indication field does not indicate the sending and / or receiving of the second channel and / or second signal based on multiple sets of TCI states; another situation may be that the DCI indication field indicates the sending and / or receiving of the second channel and / or second signal based on multiple sets of TCI states, but the terminal ignores the content indicated by the DCI indication field.

[0141] Among them, the DCI indication field can be understood as a certain indication field in the DCI, for example, it can be an indication field in the DCI used to indicate whether the PDSCH adopts one set of unified TCI states or multiple sets of unified TCI states; or, it can be an indication field in the DCI used to indicate the SRS resource set corresponding to the PUSCH.

[0142] In some embodiments, any channel and / or signal may include a second channel and / or second signal. The second channel may include a PUSCH. In this case, under the first condition, the terminal may not expect the DCI indication field to indicate that the second channel is transmitted based on multiple sets of TCI states.

[0143] For example, a DCI may include an indication field that may indicate to the terminal that the second channel is transmitted based on one or more TCI states. If the second channel includes a PUSCH, under the first condition, the terminal may not expect the indication field to indicate that the second channel is transmitted based on multiple TCI states.

[0144] In some embodiments, any channel and / or signal may include a second channel and / or second signal. The second signal may include a DMRS corresponding to a PUSCH. In this case, under the first condition, the terminal may not expect the DCI indication field to indicate that the second signal is sent based on multiple sets of TCI states.

[0145] For example, an indication field may be present in the DCI that may indicate that the terminal transmits a second signal based on one or more TCI states. If the second signal includes a DMRS corresponding to a PUSCH, under the first condition, the terminal may not expect the indication field to indicate that the second signal is transmitted based on multiple TCI states.

[0146] In some embodiments, any channel and / or signal may include a second channel and / or second signal. The second channel may include a PDSCH. In this case, under the first condition, the terminal may not expect the DCI indication field to indicate reception of the second channel based on multiple sets of TCI states.

[0147] For example, a DCI may include an indication field that may indicate that the terminal receives the second channel based on one or more TCI states. If the second channel includes a PDSCH, under the first condition, the terminal may not expect the indication field to indicate that the second channel is received based on multiple TCI states.

[0148] In some embodiments, any channel and / or signal may include a second channel and / or second signal. The second signal may include a DMRS corresponding to a PDSCH. In this case, under the first condition, the terminal may not expect the DCI indication field to indicate reception of the second signal based on multiple sets of TCI states.

[0149] For example, the DCI may include an indication field that may indicate that the terminal receives the second signal based on one or more TCI states. If the second signal includes a DMRS corresponding to a PDSCH, under the first condition, the terminal may not expect the indication field to indicate that the second signal is received based on multiple TCI states.

[0150] The present disclosure provides an implementation method for using a set of TCI states for communication for some channels and / or signals, so that network devices and terminals can uniformly use the same TCI state to send and / or receive corresponding channels and / or signals under a first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state, and improving the signal quality during communication.

[0151] In the communication method provided in the embodiments of the present disclosure, any channel and / or signal includes a third channel and / or third signal, and the third channel and / or third signal includes at least one of a PDSCH, a PUSCH, a DMRS corresponding to the PDSCH, and a DMRS corresponding to the PUSCH. Based on predefined rules, the third channel and / or third signal is determined to use multiple sets of TCI states for communication. Under a first condition, for any channel and / or signal, a set of TCI states is used for communication, which may include: under the first condition, for the third channel and / or third signal, a set of TCI states is used for communication; or, under the first condition, the third channel and / or third signal is not sent and / or received.

[0152] In some embodiments, any channel and / or signal may include a third channel and / or third signal. The third channel and / or third signal may include any one or more of the PDSCH, PUSCH, DMRS corresponding to the PDSCH, and DMRS corresponding to the PUSCH. The terminal may determine, based on predefined rules, that the third channel and / or third signal utilize multiple TCI states for communication. In this case, under a first condition, the terminal may determine that a set of TCI states is utilized for communication for the third channel and / or third signal.

[0153] For example, for any one or more of PDSCH, PUSCH, DMRS corresponding to PDSCH, and DMRS corresponding to PUSCH, if M-TRP communication is determined to be adopted based on a predefined rule, then under the first condition, the terminal can determine to perform S-TRP communication for any one or more of PDSCH, PUSCH, DMRS corresponding to PDSCH, and DMRS corresponding to PUSCH. That is, switching to S-TRP communication.

[0154] In some embodiments, any channel and / or signal may include a third channel and / or a third signal. The third channel and / or the third signal may include any one or more of the PDSCH, PUSCH, DMRS corresponding to the PDSCH, and DMRS corresponding to the PUSCH. The terminal may determine, based on predefined rules, that the third channel and / or the third signal adopt multiple sets of TCI states for communication. In this case, under the first condition, the terminal may determine not to send and / or receive the third channel and / or the third signal.

[0155] For example, for any one or more of the PDSCH, PUSCH, DMRS corresponding to the PDSCH, and DMRS corresponding to the PUSCH, if it is determined based on a predefined rule that M-TRP communication is adopted, then under the first condition, the terminal may determine not to communicate with any one or more of the PDSCH, PUSCH, DMRS corresponding to the PDSCH, and DMRS corresponding to the PUSCH. That is, the terminal does not send and / or receive any one or more of the PDSCH, PUSCH, DMRS corresponding to the PDSCH, and DMRS corresponding to the PUSCH.

[0156] The present disclosure provides an implementation method for using a set of TCI states for communication for some channels and / or signals, so that network devices and terminals can uniformly use the same TCI state to send and / or receive corresponding channels and / or signals under a first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state, and improving the signal quality during communication.

[0157] In some embodiments, any channel and / or signal includes at least one of a PUCCH and a DMRS corresponding to the PUCCH. The PUCCH and at least one of the DMRS corresponding to the PUCCH may be configured via RRC to communicate using multiple TCI states. In this case, under a first condition, the terminal may determine to use a set of TCI states for communication with respect to at least one of the PUCCH and the DMRS corresponding to the PUCCH. That is, the terminal performs S-TRP communication with respect to at least one of the PUCCH and the DMRS corresponding to the PUCCH. That is, switching to S-TRP communication occurs.

[0158] In some implementations, for some channels and / or signals, communication using multiple TCI states is not indicated or determined based on default rules. Alternatively, some channels and / or signals are configured to communicate using a single set of TCI states. For these channels and / or signals, the terminal may continue to use the single set of TCI states for communication. That is, the terminal may continue to maintain S-TRP communication for these channels and / or signals.

[0159] In the communication method provided by the embodiment of the present disclosure, under a first condition, the first channel and / or the first signal uses multiple sets of TCI states for communication, including: a set of TCI states indicated by the second information is a first set of TCI states, and the terminal maintains TCI states other than the first set of TCI states.

[0160] In some embodiments, under the first condition, the terminal continues to maintain the first channel and / or the first signal using multiple TCI states for communication, which may include the terminal continuing to maintain TCI states other than the first TCI state. The terminal updates the first TCI state based on the TCI state indicated by the second information, while the other TCI states remain unchanged.

[0161] For example, the terminal originally determined multiple sets of TCI states. Under the first condition, the terminal determines to continue to maintain M-TRP communication. Then, when the terminal receives the second information, and the second information only indicates one set of TCI states, the terminal can use the set of TCI states indicated by the second information to update a certain set of TCI states among the multiple sets of TCI states originally determined, while the other TCI states remain unchanged. For example, the terminal originally determined two sets of TCI states, the first set of TCI states and the second set of TCI states. The third set of TCI states indicated by the second information is an update to the first set of TCI states, so the two new sets of TCI states determined by the terminal include the third set of TCI states and the second set of TCI states, that is, the first set of TCI states is updated to the third set of TCI states, and the second set of TCI states continues to remain unchanged.

[0162] The present disclosure also provides a method for updating the TCI state so that network devices and terminals can uniformly use the same TCI state to send and / or receive corresponding channels and / or signals under the first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state and improving the signal quality during communication.

[0163] In the communication method provided by the embodiment of the present disclosure, the multi-TRP communication method based on S-DCI indication includes at least one of the following: space division multiplexing (SDM) scheme; frequency division multiplexing (FDM) scheme; time division multiplexing (TDM) scheme; single frequency network (SFN) scheme.

[0164] In some embodiments, the multi-TRP communication method based on S-DCI indication may include an SDM scheme.

[0165] The SDM scheme means sending and / or receiving the same transport block (TB) through different TCI states on DMRS ports of different code division multiplexing (CDM) groups using the same frequency domain resources and the same time domain resources.

[0166] In some embodiments, the multi-TRP communication method based on S-DCI indication may include an FDM scheme.

[0167] For example, the multi-TRP communication method based on S-DCI indication may include FDM scheme A and / or FDM scheme B.

[0168] The FDM solution means sending and / or receiving the same TB through different TCI states on different frequency domain resources and the same time domain resources.

[0169] In some embodiments, the multi-TRP communication method based on S-DCI indication may include a TDM scheme.

[0170] For example, the multi-TRP communication method based on S-DCI indication may include TDM scheme, and / or, PDSCH / PUSCH time domain resource allocation repetition number (repetitionNumber in PDSCH / PUSCH-TimeDomainResourceAllocation).

[0171] Among them, TDM scheme means sending and / or receiving the same TB multiple times through different TCI states on the same frequency domain resources in different time domain resources, and the different time domain resources are within the same time slot (or intra-slot).

[0172] repetitionNumber in PDSCH / PUSCH–TimeDomainResourceAllocation indicates that the same TB is sent and / or received multiple times on the same frequency domain resources with different time domain resources through different TCI states, and the different time domain resources are in different slots (or inter-slots).

[0173] In some embodiments, the multi-TRP communication method based on S-DCI indication may include an SFN scheme.

[0174] For example, the multi-TRP communication method based on S-DCI indication may include SFNschemeA and / or SFNschemeB.

[0175] Among them, SFNschemeA means that the same TB is sent and / or received through different TCI states on the same frequency domain resources and the same time domain resources, and the DMRS port of the same CDM group, and the PDSCH / PUSCH has a QCL relationship with the parameters in the two TCI states.

[0176] SFN scheme B indicates that the same TB is sent and / or received through different TCI states on the same frequency domain resources, the same time domain resources, and the DMRS ports of the same CDM group. The PDSCH / PUSCH has a QCL relationship with the parameters in the two TCI states, except for some parameters in the second TCI state. Among them, some parameters in the second TCI state may include Doppler shift, Doppler spread, etc.

[0177] It is understood that in the case of SFN scheme A, the terminal directly adopts the QCL relationships of multiple TCI states. However, in the case of SFN scheme B, the terminal does not adopt the doppler shift and doppler spread in the QCL relationship corresponding to the last TCI state.

[0178] In some embodiments, the multi-TRP communication method based on S-DCI indication may include: FDM scheme, TDM scheme; FDM scheme, SDM scheme; FDM scheme, SFN scheme; TDM scheme, SDM scheme; TDM scheme, SFN scheme; SDM scheme, SFN scheme; FDM scheme, TDM scheme, SDM scheme; FDM scheme, TDM scheme, SFN scheme; FDM scheme, SDM scheme, SFN scheme; TDM scheme, SDM scheme, SFN scheme; FDM scheme, TDM scheme, SDM scheme, SFN scheme; TDM scheme, SDM scheme, SFN scheme; FDM scheme, TDM scheme, SDM scheme, SFN scheme.

[0179] The present disclosure provides multiple expressions of the multi-TRP communication method based on S-DCI indication, so that network equipment and terminals can uniformly use the same TCI state to send and / or receive corresponding channels and / or signals under the first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state and improving the signal quality during communication.

[0180] In the communication method provided by the embodiment of the present disclosure, the unified TCI state includes at least one of the following: an uplink TCI state; a downlink TCI state; and a joint TCI state, wherein the joint TCI state is used for both uplink and downlink communications.

[0181] In some embodiments, the unified TCI state may include a UL TCI state.

[0182] In some embodiments, the unified TCI state may include a DL TCI state.

[0183] In some embodiments, the unified TCI state may include a joint TCI state, wherein the joint TCI state may be used for both uplink and downlink communications.

[0184] For example, the joint TCI state means that the UL TCI state and the DL TCI state are the same.

[0185] The present disclosure can adapt to scenarios with different unified TCI status indications, so that network devices and terminals can, under the first condition, uniformly use the same TCI status to send and / or receive corresponding channels and / or signals, thereby improving the efficiency of multi-TRP communications based on the unified TCI status, and improving the signal quality during communication.

[0186] Based on the same concept, the present disclosure also provides a communication method performed by a network device.

[0187] FIG4 is a flow chart showing another communication method according to an exemplary embodiment. As shown in FIG4 , the method is executed by a network device and may include the following steps:

[0188] In step S31, first information is received.

[0189] In some embodiments, a network device may receive first information. The first information may indicate terminal capabilities. The first information may be used to indicate at least one of the following capabilities: the terminal's ability to communicate using one set of TCI states under a first condition; or the terminal's ability to communicate using multiple sets of TCI states under the first condition.

[0190] For example, the network device receives first information, and the first information may indicate the ability of the terminal to communicate using a set of TCI states under a first condition.

[0191] For another example, the network device receives first information, and the first information may indicate the terminal's ability to communicate using multiple sets of TCI states under a first condition.

[0192] For another example, the network device receives first information, which may indicate the terminal's ability to communicate using a set of TCI states under a first condition, and the first information may also indicate the terminal's ability to communicate using multiple sets of TCI states under the first condition.

[0193] In some embodiments, the first information may be used only to indicate the terminal's ability to communicate using a set of TCI states under a first condition. In this case, the terminal may use the first information to indicate that it supports communication using a set of TCI states under the first condition, that is, to indicate that the terminal supports the ability to communicate using a set of TCI states under the first condition. The terminal may also use the first information to indicate that it does not support communication using a set of TCI states under the first condition, that is, to indicate that the terminal supports the ability to communicate using multiple sets of TCI states under the first condition.

[0194] In some embodiments, the first information may be used only to indicate the terminal's ability to communicate using multiple TCI states under a first condition. In this case, the terminal may use the first information to indicate that it supports communication using multiple TCI states under the first condition, that is, to indicate that the terminal supports the ability to communicate using multiple TCI states under the first condition. The terminal may also use the first information to indicate that it does not support communication using multiple TCI states under the first condition, that is, to indicate that the terminal supports the ability to communicate using a single TCI state under the first condition.

[0195] In some embodiments, the first information may also be referred to as capability information, terminal capability information, etc. This disclosure does not limit the name of the first information.

[0196] In some embodiments, under the first condition, the terminal supporting communication using a set of TCI states can be considered as the terminal performing S-TRP communication. Of course, if the terminal is originally in M-TRP communication, it can be understood that the terminal switches to S-TRP communication.

[0197] In some embodiments, under the first condition, the terminal supporting communication using multiple TCI states can be considered as the terminal performing M-TRP communication. Of course, if the terminal is originally in M-TRP communication, it can be understood that the terminal continues to maintain M-TRP communication.

[0198] The present disclosure enables the terminal to report the communication capabilities supported by its own device, so that the network device and the terminal can uniformly use the same TCI state for communication, thereby improving the efficiency of multi-TRP communication based on the unified TCI state and improving the signal quality during communication.

[0199] In the communication method provided by the embodiments of the present disclosure, FIG5 is a flow chart of another communication method according to an exemplary embodiment. At least one channel and / or signal sent and / or received by the network device is configured to adopt a multi-TRP communication method based on S-DCI indication. As shown in FIG5 , the method may further include the following steps:

[0200] In step S41, the second information is sent.

[0201] In some embodiments, the network device may send second information. The second information may be used to indicate a unified TCI state. The first condition is that the unified TCI state indicated by the second information is a set of unified TCI states.

[0202] For example, the network device can be configured to adopt a multi-TRP communication method indicated by S-DCI to send and / or receive at least one channel and / or signal.

[0203] For example, the network device is configured to use the multi-TRP communication method indicated by the S-DCI to send at least one channel. For another example, the network device is configured to use the multi-TRP communication method indicated by the S-DCI to send at least one signal. For another example, the network device is configured to use the multi-TRP communication method indicated by the S-DCI to receive at least one channel. For another example, the network device is configured to use the multi-TRP communication method indicated by the S-DCI to receive at least one signal.

[0204] In the above situation, the network device may send second information. This second information is used to indicate the unified TCI state. The second information may include DCI. For example, the second information may be indicated via a TCI field in the DCI, that is, the TCI field is used to indicate the unified TCI state. For example, the TCI field may be used to indicate whether the PDSCH uses one or more unified TCI states; alternatively, the TCI field may be used to indicate the SRS resource set corresponding to the PUSCH.

[0205] In some embodiments, the first condition may be that the second information sent by the network device indicates a unified TCI state. That is, if the network device is configured to use a multi-TRP communication method indicated by S-DCI and transmit and / or receive at least one channel and / or signal, the second information is sent. Furthermore, the second information indicates a unified TCI state. In this case, the first condition is considered to be met.

[0206] For example, for a network device configured with an S-DCI-based M-TRP scheme, when the second information sent by the network device only indicates a joint TCI state, or the second information only indicates a UL TCI state and / or a DL TCI state, it can be considered that the first condition is met.

[0207] The present disclosure provides a possible first condition for a terminal to report the communication capabilities supported by the terminal under the first condition. This allows the network device and the terminal to uniformly use the same TCI state for communication under the first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state and improving the signal quality during communication.

[0208] In the communication method provided by the embodiment of the present disclosure, the method further includes: configuring multiple sets of TCI states; configuring the terminal to communicate using one set of TCI states or multiple sets of TCI states under a first condition; sending third information, the third information being used to instruct the terminal to communicate using one set of TCI states or multiple sets of TCI states under the first condition; and / or, determining based on a predefined rule that the terminal communicates using one set of TCI states or multiple sets of TCI states under the first condition. Using one set of TCI states for communication means using a unified set of TCI states indicated by the second information for communication; using multiple sets of TCI states for communication means using a unified set of TCI states indicated by the second information to update multiple sets of TCI states, and communicating based on the updated multiple sets of TCI states.

[0209] In some embodiments, a network device may be configured with multiple sets of TCI states.

[0210] For example, a network device is configured with multiple TCI states, and the terminal determines the multiple TCI states based on information sent by the network device indicating the multiple TCI states. In this case, the network device may send information indicating the multiple TCI states to the terminal so that the terminal can determine the multiple TCI states.

[0211] In some embodiments, the predefined rules may predefine multiple sets of TCI states. The network device determines the multiple sets of TCI states based on the predefined rules.

[0212] In some embodiments, the network device may configure the terminal to use one or more TCI states for communication under a first condition. The network device may send third information indicating that the terminal uses one or more TCI states for communication under the first condition. Based on the received third information, the terminal can determine whether the terminal uses one or more TCI states for communication under the first condition.

[0213] For example, the network device sends a third message. The third message instructs the terminal to perform S-TRP communication under the first condition. Of course, if the terminal is originally in M-TRP communication, it can be understood that the terminal switches to S-TRP communication.

[0214] For another example, the network device sends third information. The third information instructs the terminal to perform M-TRP communication under the first condition. It can be understood that if the terminal is originally in M-TRP communication, it can be understood that the terminal continues to maintain M-TRP communication.

[0215] It is understandable that, for different channels and / or signals, the same third information can be used to instruct the terminal to perform S-TRP communication or M-TRP communication under the first condition. Alternatively, for different channels and / or signals, different third information can be used to instruct the terminal to perform S-TRP communication or M-TRP communication under the first condition. The third information mentioned in each embodiment of the present disclosure can be carried by at least one of RRC, MAC CE and DCI.

[0216] In some embodiments, the network device may determine, based on predefined rules, that the terminal uses one set of TCI states for communication under the first condition, or uses multiple sets of TCI states for communication.

[0217] For example, the network device may determine, based on a predefined rule, that the terminal performs S-TRP communication under the first condition. Of course, if the terminal originally performs M-TRP communication, it may be understood that the terminal switches to S-TRP communication.

[0218] For another example, the network device may determine, based on a predefined rule, that the terminal performs M-TRP communication under the first condition. It is understood that if the terminal is originally performing M-TRP communication, it can be understood that the terminal continues to maintain M-TRP communication.

[0219] Of course, for the case where the terminal originally supports M-TRP communication. If the terminal only supports the ability to perform S-TRP communication under the first condition. The predefined rule may include the terminal switching to S-TRP communication under the first condition. Or, if the terminal only supports the ability to perform M-TRP communication under the first condition. The predefined rule may include the terminal maintaining M-TRP communication under the first condition. For the terminal that supports both the ability to perform S-TRP communication under the first condition and the ability to perform M-TRP communication under the first condition. The predefined rule may determine that the terminal switches to S-TRP communication under the first condition; or the predefined rule may determine that the terminal maintains M-TRP communication under the first condition.

[0220] It is understandable that, for different channels and / or signals, the same predefined rules may be used to determine whether the terminal performs S-TRP communication or M-TRP communication under the first condition. Alternatively, for different channels and / or signals, different predefined rules may be used to determine whether the terminal performs S-TRP communication or M-TRP communication under the first condition, respectively, and this disclosure is not limited thereto.

[0221] In some embodiments, the use of a set of TCI states for communication as described in various embodiments of the present disclosure may be expressed as the use of a unified set of TCI states indicated by the second information. For example, if the terminal determines to use S-TRP communication, the terminal uses the set of TCI states indicated by the second information for S-TRP communication.

[0222] In some embodiments, the use of multiple TCI states for communication involved in various embodiments of the present disclosure can be represented by using a unified set of TCI states indicated by second information to update multiple TCI states, and then communicating based on the updated multiple TCI states. For example, if a terminal determines to use M-TRP communication, in this case, the terminal uses the set of TCI states indicated by the second information to update the multiple TCI states that have been determined. For example, a set of TCI states from the multiple TCI states is updated. The terminal then performs S-TRP communication based on the updated multiple TCI states.

[0223] The present disclosure provides multiple communication modes for terminals under the first condition, so that network equipment and terminals can uniformly use the same TCI state to communicate under the first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state and improving the signal quality during communication.

[0224] In the communication method provided by the embodiment of the present disclosure, a set of TCI states is used for communication, which may include: for any channel and / or signal, a set of TCI states is used for communication.

[0225] In some embodiments, using a set of TCI states for communication may be that under a first condition, a set of TCI states is used for communication for any channel and / or signal.

[0226] For example, under the first condition, for any channel, a set of TCI states is used for communication.

[0227] For example, for any one or more of PDCCH, PUCCH, PDSCH, and PUSCH, a set of TCI states are used for communication.

[0228] For another example, under the first condition, a set of TCI states is used for communication for any signal.

[0229] For example, for any one or more of the DMRS corresponding to the PDCCH, the DMRS corresponding to the PUCCH, the DMRS corresponding to the PDSCH, the DMRS corresponding to the PUSCH, the CSI-RS, the SRS, the PRS, and the TRS, a set of TCI states is used for communication.

[0230] It can be understood that for communication using a set of TCI states, it can be considered that for any channel and / or signal, even if it is predetermined to be based on M-TRP communication through RRC, MAC CE, DCI or predefined rules, under the first condition, it will switch to S-TRP-based communication when sending or receiving the corresponding channel and / or signal.

[0231] The present disclosure provides a specific implementation method for communicating using a set of TCI states, so that network devices and terminals can uniformly use the same TCI state for communication under the first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state and improving the signal quality during communication.

[0232] In the communication method provided by the embodiment of the present disclosure, any channel and / or signal includes a first channel and / or a first signal. The first channel and / or the first signal is configured to adopt a multi-TRP transmission method based on an S-DCI indication. Using multiple sets of TCI states for communication may include: under a first condition, the first channel and / or the first signal uses multiple sets of TCI states for communication.

[0233] In some embodiments, any channel and / or signal may include a first channel and / or a first signal. The first channel and / or the first signal is configured to adopt a multi-TRP transmission method based on an S-DCI indication. In this case, using multiple sets of TCI states for communication may be that under the first condition, the terminal continues to maintain the first channel and / or the first signal using multiple sets of TCI states for communication.

[0234] For example, for a first channel configured to adopt a multi-TRP transmission method based on an S-DCI indication, under a first condition, it is determined to continue to maintain the first channel adopting multiple sets of TCI states for communication.

[0235] For example, for any one or more of PDCCH, PUCCH, PDSCH, and PUSCH configured to adopt a multi-TRP transmission method based on S-DCI indication, under the first condition, it is determined to continue to use multiple sets of TCI states for communication.

[0236] For another example, for a first signal configured to adopt a multi-TRP transmission method based on an S-DCI indication, under a first condition, it is determined to continue to maintain the first signal adopting multiple sets of TCI states for communication.

[0237] For example, for any one or more of the DMRS corresponding to PDCCH, DMRS corresponding to PUCCH, DMRS corresponding to PDSCH, DMRS corresponding to PUSCH, CSI-RS, SRS, PRS, and TRS configured to adopt a multi-TRP transmission method based on S-DCI indication, under the first condition, it is determined to continue to use multiple sets of TCI states for communication.

[0238] It can be understood that for communication using multiple TCI states, it can be considered that for any channel and / or signal, if originally determined to be based on M-TRP communication through RRC, MAC CE, DCI, or predefined rules, then under the first condition, M-TRP communication will continue. For other channels and / or signals not configured to use the multi-TRP transmission method, the original S-TRP communication will continue. In this case, for the set of TCI states indicated by the second information, one of the multiple TCI states previously determined by the terminal can be updated accordingly. For example, the network device preconfigured two sets of TCI states, such as a first set of TCI states and a second set of TCI states. The TCI states indicated by the second indication information are a third set of TCI states, and the third set of TCI states is an update of the first set of TCI states. If the terminal determines to use multiple TCI states for communication, the terminal can update the first set of TCI states based on the third set of TCI states indicated by the received second information. That is, the two new sets of TCI states determined by the terminal include the third set of TCI states and the second set of TCI states. It will be appreciated that in this disclosure, among multiple sets of TCI states, the TCI states that are updated using the third set of TCI states indicated by the second information are referred to as the first set of TCI states. The TCI states that have not been updated can be referred to as the second set of TCI states. The terminal updates the first set of TCI states based on the third set of TCI states indicated by the second information, while the second set of TCI states remains unchanged.

[0239] For example, for some CORESETs configured through RRC to adopt multiple TCI state communications, for the PDCCHs corresponding to these CORESETs, under the first condition, the terminal may determine to continue to maintain M-TRP communication.

[0240] For another example, if multiple search space sets are configured as a link relationship, then for the PDCCHs corresponding to the multiple search space sets, under the first condition, it can be determined to continue to maintain M-TRP communication. That is, the TCI state corresponding to the CORESET corresponding to each search space set is used to detect the PDCCH candidates on the multiple search space sets respectively. Among them, the link relationship can be expressed as the above-mentioned multiple search space sets are used for PDCCH repetition. PDCCH repetition means that the same PDCCH candidate identifiers are included in multiple search space sets, and the DCI information sent by multiple identical PDCCH candidate identifiers is the same. For example, two search space sets are configured with a link relationship, and the terminal originally determines two sets of TCI states including the first set of TCI states and the second set of TCI states. The first search space set corresponds to the first set of TCI states for detection, and the second search space set corresponds to the second set of TCI states for detection. If the second information only indicates the third set of TCI states, and the third set of TCI states is an update to the first set of TCI states. Then, when the terminal continues to maintain M-TRP communication, the terminal detects PDCCH candidates on the first search space set based on the third set of TCI states, and detects PDCCH candidates on the second search space set based on the second set of TCI states.

[0241] A PDCCH candidate can be understood as a transmission resource corresponding to a PDCCH, and a CORESET can correspond to one or more PDCCH candidates. A network device and / or terminal will send and / or receive a PDCCH based on one of the PDCCH candidates.

[0242] For another example, for some PUCCHs and at least one of the DMRSs corresponding to the PUCCHs, multiple sets of TCI state communications can be configured through RRC. Then, for these PUCCHs and at least one of the DMRSs corresponding to the PUCCHs, under the first condition, it can be determined to continue to maintain M-TRP communication.

[0243] For another example, for some PDSCHs, PUSCHs, DMRSs corresponding to PDSCHs, and at least one of DMRSs corresponding to PUSCHs, DCI may indicate the use of multiple TCI state communications. For at least one of these PDSCHs, PUSCHs, DMRSs corresponding to PDSCHs, and DMRSs corresponding to PUSCHs, under the first condition, it may be determined that M-TRP communication continues.

[0244] For another example, for some PDSCHs, PUSCHs, DMRSs corresponding to PDSCHs, and at least one of DMRSs corresponding to PUSCHs, it may be determined based on predefined rules to adopt multiple sets of TCI state communications. Then, for at least one of these PDSCHs, PUSCHs, DMRSs corresponding to PDSCHs, and DMRSs corresponding to PUSCHs, under the first condition, it may be determined to continue to maintain M-TRP communication.

[0245] For example, for some channels and / or signals, it may not be indicated or determined based on default rules to adopt multiple sets of TCI state communications. In this case, for these channels and / or signals, under the first condition, it can be determined to continue to maintain S-TRP communication.

[0246] In some embodiments, the identifier may be an ID or an index.

[0247] The present disclosure provides a specific implementation method for communicating using multiple sets of TCI states, so that network devices and terminals can uniformly use the same TCI state for communication under the first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state and improving the signal quality during communication.

[0248] In the communication method provided by the embodiment of the present disclosure, the channel and / or signal includes at least one of the following: PDCCH; DMRS corresponding to PDCCH; PUCCH; DMRS corresponding to PUCCH; PDSCH; DMRS corresponding to PDSCH; PUSCH; DMRS corresponding to PUSCH; SRS; CSI-RS; PRS; TRS.

[0249] In some embodiments, the channel may include a PDCCH.

[0250] In some embodiments, the channel may include a PDSCH.

[0251] In some embodiments, the channel may include a PUCCH.

[0252] In some embodiments, the channel may include a PUSCH.

[0253] In some embodiments, the channel may also include: PDCCH, PDSCH; PDCCH, PUCCH; PDCCH, PUSCH; PDSCH, PUCCH; PDSCH, PUSCH; PUCCH, PUSCH; PDCCH, PDSCH, PUCCH; PDCCH, PDSCH, PUSCH; PDCCH, PUCCH, PUSCH; PDCCH, PDSCH, PUCCH, PUSCH; PDCCH, PDSCH, PUCCH, PUSCH.

[0254] In some embodiments, the signal may include a DMRS corresponding to the PDCCH.

[0255] In some embodiments, the signal may include a DMRS corresponding to the PDSCH.

[0256] In some embodiments, the signal may include a DMRS corresponding to the PUCCH.

[0257] In some embodiments, the signal may include a DMRS corresponding to the PUSCH.

[0258] In some embodiments, the signal may include SRS.

[0259] In some embodiments, the signal may include a CSI-RS.

[0260] In some embodiments, the signal may include a PRS.

[0261] In some embodiments, the signal may include TRS.

[0262] In some embodiments, the signal may further include: DMRS and SRS corresponding to the PDCCH; DMRS, SRS, and CSI-RS corresponding to the PDCCH; DMRS corresponding to the PDCCH and DMRS, SRS, and CSI-RS corresponding to the PDSCH; DMRS, SRS, and CSI-RS corresponding to the PDCCH, PRS, and TRS corresponding to the PDCCH; DMRS corresponding to the PDCCH and DMRS, SRS, and CSI-RS corresponding to the PUSCH; DMRS corresponding to the PDCCH and DMRS, SRS, and CSI-RS corresponding to the PDSCH, PRS, and TRS corresponding to the PUSCH; DMRS corresponding to the PDCCH and DMRS, SRS, and CSI-RS corresponding to the PDSCH, PRS, and TRS corresponding to the PUSCH. It will be understood that the signal may further include any two, three, four, five, six, seven, or eight of the above-mentioned items, which are not listed one by one in this disclosure for the convenience of description.

[0263] The present disclosure provides a variety of channel and signal implementation methods so that network devices and terminals can uniformly use the same TCI state to send and / or receive corresponding channels and / or signals under the first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state and improving the signal quality during communication.

[0264] In the communication method provided in the embodiments of the present disclosure, any channel and / or signal includes a PDCCH, the PDCCH corresponds to a first CORESET, and the first CORESET is configured to communicate using multiple sets of TCI states. Under a first condition, using a set of TCI states for communication for any channel and / or signal may include: under the first condition, using a set of TCI states for communication for the PDCCH corresponding to the first CORESET; or, under the first condition, determining that the terminal does not detect a PDCCH candidate on the first CORESET.

[0265] In some embodiments, any channel and / or signal may include a PDCCH. The PDCCH corresponds to a first CORESET. It will be appreciated that the PDCCH sent by the network device may be sent via resources on the first CORESET. The first CORESET is configured to communicate using multiple sets of TCI states. In this case, under a first condition, it is determined that the terminal can communicate using a set of TCI states for the PDCCH corresponding to the first CORESET.

[0266] For example, some CORESETs are configured via RRC to use multiple TCI states for communication. Under the first condition, using one set of TCI states for communication may involve switching the PDCCH corresponding to these CORESETs to S-TRP communication.

[0267] In some embodiments, any channel and / or signal may include a PDCCH. The PDCCH corresponds to a first CORESET. It is understood that the PDCCH transmitted by the network device may be transmitted via resources on the first CORESET. The first CORESET is configured to communicate using multiple TCI states. In this case, under a first condition, it may be determined that the terminal does not detect a PDCCH candidate on the first CORESET.

[0268] For example, some CORESETs are configured via RRC to use multiple TCI states for communication. In the first condition, the terminal may not detect PDCCH candidates on these CORESETs.

[0269] The present disclosure provides an implementation method for using a set of TCI states for communication on PDCCH, so that network equipment and terminals can uniformly use the same TCI state to send and / or receive corresponding channels and / or signals under a first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state, and improving the signal quality during communication.

[0270] In the communication method provided by the embodiment of the present disclosure, any channel and / or signal includes a PDCCH, the PDCCH includes PDCCH candidates on multiple search space sets, and the multiple search space sets are configured as a link relationship. Under a first condition, for any channel and / or signal, a set of TCI states are used for communication, which may include: under the first condition, determining that the terminal detects PDCCH candidates on a search space set using a set of TCI states indicated by second information in multiple search space sets; or, under the first condition, determining that the terminal does not detect PDCCH candidates on multiple search space sets.

[0271] In some embodiments, any channel and / or signal may include a PDCCH. The PDCCH may include PDCCH candidates from multiple search space sets. The multiple search space sets are configured as linked. In this case, under a first condition, it may be determined that the terminal detects PDCCH candidates from a search space set with a set of TCI states indicated by the second information in the multiple search space sets.

[0272] For example, multiple search space sets are configured with a link relationship. Then, for the PDCCH corresponding to the multiple search space sets, under the first condition, a set of TCI states is used for communication. It can be determined that the terminal only uses a set of TCI states indicated by the second information to detect the PDCCH candidates on the search space set corresponding to the set of TCI states indicated. For example, two search space sets are configured with a link relationship, and the terminal originally determined two sets of TCI states including a first set of TCI states and a second set of TCI states. The first search space set corresponds to the first set of TCI states for detection, and the second search space set corresponds to the second set of TCI states for detection. If the second information only indicates a third set of TCI states, and the third set of TCI states is an update of the first set of TCI states, then the terminal detects the PDCCH candidates on the first search space set based on the third set of TCI states.

[0273] In some embodiments, any channel and / or signal may include a PDCCH. The PDCCH may include PDCCH candidates on multiple search space sets. The multiple search space sets are configured as linked relationships. In this case, under the first condition, it may be determined that the terminal does not detect PDCCH candidates on the multiple search space sets.

[0274] For example, multiple search space sets are configured with a link relationship. Then, for the PDCCH corresponding to the multiple search space sets, under the first condition, it can be determined that the terminal does not detect the PDCCH candidates on the multiple search space sets. For example, two search space sets are configured with a link relationship, and the terminal originally determined two sets of TCI states including a first set of TCI states and a second set of TCI states. The first search space set corresponds to the first set of TCI states for detection, and the second search space set corresponds to the second set of TCI states for detection. If the second information only indicates the third set of TCI states, and the third set of TCI states is an update of the first set of TCI states, then the terminal does not need to detect the PDCCH candidates on the first search space set, and does not detect the PDCCH candidates on the second search space set.

[0275] The present disclosure provides an implementation method for using a set of TCI states for communication on PDCCH, so that network equipment and terminals can uniformly use the same TCI state to send and / or receive corresponding channels and / or signals under a first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state, and improving the signal quality during communication.

[0276] In the communication method provided in the embodiments of the present disclosure, any channel and / or signal includes a second channel and / or second signal, and the second channel and / or second signal includes at least one of a PDSCH, a PUSCH, a DMRS corresponding to the PDSCH, and a DMRS corresponding to the PUSCH. Under the first condition, the DCI indication field does not indicate that the second channel and / or second signal is transmitted and / or received based on multiple TCI states.

[0277] In some embodiments, the DCI indication field can be understood as a certain indication field in the DCI, for example, it can be an indication field in the DCI used to indicate whether the PDSCH adopts one set of unified TCI states or multiple sets of unified TCI states; or, it can be an indication field in the DCI used to indicate the SRS resource set corresponding to the PUSCH.

[0278] In some embodiments, any channel and / or signal may include a second channel and / or second signal. The second channel may include a PUSCH. In this case, under the first condition, the DCI indication field does not indicate that the terminal transmits the second channel based on multiple sets of TCI states.

[0279] For example, a DCI may include an indication field that may indicate that the terminal transmits the second channel based on one or more TCI states. If the second channel includes a PUSCH, under the first condition, the indication field does not indicate that the terminal transmits the second channel based on multiple TCI states.

[0280] In some embodiments, any channel and / or signal may include a second channel and / or second signal. The second signal may include a DMRS corresponding to a PUSCH. In this case, under the first condition, the DCI indication field does not indicate that the terminal transmits the second signal based on multiple TCI states.

[0281] For example, an indication field may be present in the DCI, which may indicate that the terminal transmits the second signal based on one or more TCI states. If the second signal includes a DMRS corresponding to a PUSCH, under the first condition, the indication field may not indicate that the terminal transmits the second signal based on multiple TCI states.

[0282] In some embodiments, any channel and / or signal may include a second channel and / or second signal. The second channel may include a PDSCH. In this case, under the first condition, the DCI indication field does not indicate that the terminal receives the second channel based on multiple sets of TCI states.

[0283] For example, the DCI may include an indication field that may indicate that the terminal receives the second channel based on one or more TCI states. If the second channel includes the PDSCH, under the first condition, the indication field does not indicate that the terminal receives the second channel based on multiple TCI states.

[0284] In some embodiments, any channel and / or signal may include a second channel and / or second signal. The second signal may include a DMRS corresponding to a PDSCH. In this case, under the first condition, the DCI indication field does not indicate that the terminal receives the second signal based on multiple sets of TCI states.

[0285] For example, the DCI may include an indication field that may indicate that the terminal receives the second signal based on one or more TCI states. If the second signal includes a DMRS corresponding to a PDSCH, under the first condition, the indication field does not indicate that the terminal receives the second signal based on multiple TCI states.

[0286] The present disclosure provides an implementation method for using a set of TCI states for communication for some channels and / or signals, so that network devices and terminals can uniformly use the same TCI state to send and / or receive corresponding channels and / or signals under a first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state, and improving the signal quality during communication.

[0287] In the communication method provided in the embodiments of the present disclosure, any channel and / or signal includes a third channel and / or third signal, and the third channel and / or third signal includes at least one of a PDSCH, a PUSCH, a DMRS corresponding to the PDSCH, and a DMRS corresponding to the PUSCH. Based on predefined rules, the third channel and / or third signal is determined to use multiple sets of TCI states for communication. Under a first condition, for any channel and / or signal, a set of TCI states is used for communication, which may include: under the first condition, for the third channel and / or third signal, a set of TCI states is used for communication; or, under the first condition, the third channel and / or third signal is not sent and / or received.

[0288] In some embodiments, any channel and / or signal may include a third channel and / or a third signal. The third channel and / or the third signal may include any one or more of the PDSCH, PUSCH, DMRS corresponding to the PDSCH, and DMRS corresponding to the PUSCH. The network device may determine, based on predefined rules, that the third channel and / or the third signal use multiple sets of TCI states for communication. In this case, under the first condition, the network device may determine that a set of TCI states is used for communication for the third channel and / or the third signal.

[0289] For example, for any one or more of PDSCH, PUSCH, DMRS corresponding to PDSCH, and DMRS corresponding to PUSCH, if M-TRP communication is determined to be adopted based on a predefined rule, then under the first condition, the network device may determine to perform S-TRP communication for any one or more of PDSCH, PUSCH, DMRS corresponding to PDSCH, and DMRS corresponding to PUSCH. That is, switching to S-TRP communication.

[0290] In some embodiments, any channel and / or signal may include a third channel and / or a third signal. The third channel and / or the third signal may include any one or more of the PDSCH, PUSCH, DMRS corresponding to the PDSCH, and DMRS corresponding to the PUSCH. The network device may determine, based on predefined rules, that the third channel and / or the third signal adopt multiple sets of TCI states for communication. In this case, under the first condition, the network device may determine not to send and / or receive the third channel and / or the third signal.

[0291] For example, for any one or more of the PDSCH, PUSCH, DMRS corresponding to the PDSCH, and DMRS corresponding to the PUSCH, if it is determined based on a predefined rule that M-TRP communication is adopted, then under the first condition, the network device may determine not to communicate with respect to any one or more of the PDSCH, PUSCH, DMRS corresponding to the PDSCH, and DMRS corresponding to the PUSCH. That is, the network device does not send and / or receive any one or more of the PDSCH, PUSCH, DMRS corresponding to the PDSCH, and DMRS corresponding to the PUSCH.

[0292] The present disclosure provides an implementation method for using a set of TCI states for communication for some channels and / or signals, so that network devices and terminals can uniformly use the same TCI state to send and / or receive corresponding channels and / or signals under a first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state, and improving the signal quality during communication.

[0293] In some embodiments, any channel and / or signal includes at least one of a PUCCH and a DMRS corresponding to the PUCCH. The PUCCH and at least one of the DMRS corresponding to the PUCCH may be configured via RRC to communicate using multiple TCI states. In this case, under a first condition, the network device may determine to use a set of TCI states for communication with respect to at least one of the PUCCH and the DMRS corresponding to the PUCCH. That is, the network device performs S-TRP communication with respect to at least one of the PUCCH and the DMRS corresponding to the PUCCH. That is, switching to S-TRP communication occurs.

[0294] In some implementations, for some channels and / or signals, communication using multiple TCI states is not indicated or determined based on default rules. Alternatively, some channels and / or signals are configured to communicate using a single set of TCI states. For these channels and / or signals, the network device may continue to use the single set of TCI states for communication, i.e., the network device may continue to maintain S-TRP communication for these channels and / or signals.

[0295] In the communication method provided by the embodiment of the present disclosure, under a first condition, the first channel and / or the first signal uses multiple sets of TCI states for communication, including: a set of TCI states indicated by the second information is a first set of TCI states, and determining that the terminal maintains a TCI state other than the first set of TCI states.

[0296] In some embodiments, under the first condition, the terminal continues to maintain the first channel and / or the first signal using multiple TCI states for communication. This may include determining that the terminal continues to maintain TCI states other than the first set of TCI states. Furthermore, the terminal updates the first set of TCI states based on the set of TCI states indicated by the second information. The other TCI states remain unchanged.

[0297] For example, the network device is pre-configured with multiple sets of TCI states. The terminal can determine multiple sets of TCI states based on the configuration of the network device. Under the first condition, the network device determines to continue to maintain M-TRP communication. Then, when the terminal receives the second information, and the second information only indicates one set of TCI states, the terminal can use the set of TCI states indicated by the second information to update a certain set of TCI states among the multiple sets of TCI states that have been determined, while the other TCI states remain unchanged. For example, the terminal originally determined two sets of TCI states, the first set of TCI states and the second set of TCI states. The third set of TCI states indicated by the second information is an update to the first set of TCI states, so the two new sets of TCI states determined by the terminal include the third set of TCI states and the second set of TCI states, that is, the first set of TCI states is updated to the third set of TCI states, and the second set of TCI states continues to remain unchanged.

[0298] The present disclosure also provides a method for updating the TCI state so that network devices and terminals can uniformly use the same TCI state to send and / or receive corresponding channels and / or signals under the first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state and improving the signal quality during communication.

[0299] In the communication method provided by the embodiment of the present disclosure, the multi-TRP communication method based on S-DCI indication includes at least one of the following: SDM scheme; FDM scheme; TDM scheme; SFN scheme.

[0300] In some embodiments, the multi-TRP communication method based on S-DCI indication may include an SDM scheme.

[0301] The SDM solution means sending and / or receiving the same TB through different TCI states on DMRS ports of different CDM groups using the same frequency domain resources and the same time domain resources.

[0302] In some embodiments, the multi-TRP communication method based on S-DCI indication may include an FDM scheme.

[0303] For example, the multi-TRP communication method based on S-DCI indication may include FDM scheme A and / or FDM scheme B.

[0304] The FDM solution means sending and / or receiving the same TB through different TCI states on different frequency domain resources and the same time domain resources.

[0305] In some embodiments, the multi-TRP communication method based on S-DCI indication may include a TDM scheme.

[0306] For example, the multi-TRP communication method based on S-DCI indication may include TDM scheme, and / or repetition Number in PDSCH / PUSCH-TimeDomainResourceAllocation.

[0307] Among them, TDM scheme means sending and / or receiving the same TB multiple times through different TCI states on the same frequency domain resources with different time domain resources, and the different time domain resources are in the same slot (or intra-slot).

[0308] repetitionNumber in PDSCH / PUSCH–TimeDomainResourceAllocation indicates that the same TB is sent and / or received multiple times on the same frequency domain resources with different time domain resources through different TCI states, and the different time domain resources are in different slots (or inter-slots).

[0309] In some embodiments, the multi-TRP communication method based on S-DCI indication may include an SFN scheme.

[0310] For example, the multi-TRP communication method based on S-DCI indication may include SFNschemeA and / or SFNschemeB.

[0311] Among them, SFNschemeA means that the same TB is sent and / or received through different TCI states on the same frequency domain resources and the same time domain resources, and the DMRS port of the same CDM group, and the PDSCH / PUSCH has a QCL relationship with the parameters in the two TCI states.

[0312] SFN scheme B indicates that the same TB is sent and / or received through different TCI states on the same frequency domain resources, the same time domain resources, and the DMRS ports of the same CDM group. The PDSCH / PUSCH has a QCL relationship with the parameters in the two TCI states, except for some parameters in the second TCI state. Among them, some parameters in the second TCI state may include doppler shift, doppler spread, etc.

[0313] It is understood that in the case of SFN scheme A, the terminal directly adopts the QCL relationships of multiple TCI states. However, in the case of SFN scheme B, the terminal does not adopt the doppler shift and doppler spread in the QCL relationship corresponding to the last TCI state.

[0314] In some embodiments, the multi-TRP communication method based on S-DCI indication may include: FDM scheme, TDM scheme; FDM scheme, SDM scheme; FDM scheme, SFN scheme; TDM scheme, SDM scheme; TDM scheme, SFN scheme; SDM scheme, SFN scheme; FDM scheme, TDM scheme, SDM scheme; FDM scheme, TDM scheme, SFN scheme; FDM scheme, SDM scheme, SFN scheme; TDM scheme, SDM scheme, SFN scheme; FDM scheme, TDM scheme, SDM scheme, SFN scheme; TDM scheme, SDM scheme, SFN scheme; FDM scheme, TDM scheme, SDM scheme, SFN scheme.

[0315] The present disclosure provides multiple expressions of the multi-TRP communication method based on S-DCI indication, so that network equipment and terminals can uniformly use the same TCI state to send and / or receive corresponding channels and / or signals under the first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state and improving the signal quality during communication.

[0316] In the communication method provided by the embodiment of the present disclosure, the unified TCI state includes at least one of the following: an uplink TCI state; a downlink TCI state; and a joint TCI state, wherein the joint TCI state is used for both uplink and downlink communications.

[0317] In some embodiments, the unified TCI state may include a UL TCI state.

[0318] In some embodiments, the unified TCI state may include a DL TCI state.

[0319] In some embodiments, the unified TCI state may include a joint TCI state, wherein the joint TCI state may be used for both uplink and downlink communications.

[0320] For example, the joint TCI state means that the UL TCI state and the DL TCI state are the same.

[0321] The present disclosure can adapt to scenarios with different unified TCI status indications, so that network devices and terminals can, under the first condition, uniformly use the same TCI status to send and / or receive corresponding channels and / or signals, thereby improving the efficiency of multi-TRP communications based on the unified TCI status, and improving the signal quality during communication.

[0322] It should be noted that those skilled in the art will appreciate that the various implementation methods / embodiments involved in the embodiments of the present disclosure can be used in conjunction with the aforementioned embodiments or can be used independently. Whether used alone or in conjunction with the aforementioned embodiments, the implementation principles are similar. In the implementation of the present disclosure, some embodiments are described in terms of implementation methods used together. Of course, those skilled in the art will appreciate that such examples are not limitations on the embodiments of the present disclosure.

[0323] Based on the same concept, the embodiments of the present disclosure also provide a communication device and equipment.

[0324] It is understandable that the communication devices and equipment provided by the embodiments of the present disclosure include hardware structures and / or software modules corresponding to the execution of each function in order to realize the above functions. In combination with the units and algorithm steps of each example disclosed in the embodiments of the present disclosure, the embodiments of the present disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the technical solution of the embodiments of the present disclosure.

[0325] Figure 6 is a schematic diagram of a communication device according to an exemplary embodiment. Referring to Figure 6 , the device 200 includes a sending module 201 configured to send first information indicating terminal capabilities. The first information indicates at least one of the following capabilities: the terminal's ability to communicate using one set of TCI states under a first condition; or the terminal's ability to communicate using multiple sets of TCI states under a first condition.

[0326] The present disclosure enables the terminal to report the communication capabilities supported by its own device, so that the network device and the terminal can uniformly use the same TCI state for communication, thereby improving the efficiency of multi-TRP communication based on the unified TCI state and improving the signal quality during communication.

[0327] In some embodiments, at least one channel and / or signal sent and / or received by the terminal is configured to adopt a multi-TRP communication method based on S-DCI indication; the device 200 also includes: a receiving module 202, used to receive second information, the second information is used to indicate a unified TCI state; wherein the first condition is that the unified TCI state indicated by the second information is a set of unified TCI states.

[0328] The present disclosure provides a possible first condition for a terminal to report the communication capabilities supported by the terminal under the first condition. This allows the network device and the terminal to uniformly use the same TCI state for communication under the first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state and improving the signal quality during communication.

[0329] In some embodiments, the device 200 also includes: a processing module 203, used to determine multiple sets of TCI states; the receiving module 202 is also used to receive third information, the third information is used to indicate that the terminal uses a set of TCI states to communicate under the first condition, or uses multiple sets of TCI states to communicate; and / or, the processing module 203 is also used to determine, based on predefined rules, whether the terminal uses a set of TCI states to communicate under the first condition, or uses multiple sets of TCI states to communicate; wherein, using a set of TCI states to communicate means using a set of unified TCI states indicated by the second information to communicate; using multiple sets of TCI states to communicate means using a set of unified TCI states indicated by the second information to update multiple sets of TCI states, and communicating based on the updated multiple sets of TCI states.

[0330] The present disclosure provides multiple communication modes for terminals under the first condition, so that network equipment and terminals can uniformly use the same TCI state to communicate under the first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state and improving the signal quality during communication.

[0331] In some embodiments, using a set of TCI states for communication includes: using a set of TCI states for communication for any channel and / or signal.

[0332] The present disclosure provides a specific implementation method for communicating using a set of TCI states, so that network devices and terminals can uniformly use the same TCI state for communication under the first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state and improving the signal quality during communication.

[0333] In some embodiments, any channel and / or signal includes a first channel and / or a first signal, and the first channel and / or the first signal are configured to adopt a multi-TRP transmission method based on the S-DCI indication; and adopt multiple sets of TCI states for communication, including: under a first condition, the first channel and / or the first signal adopts multiple sets of TCI states for communication.

[0334] The present disclosure provides a specific implementation method for communicating using multiple sets of TCI states, so that network devices and terminals can uniformly use the same TCI state for communication under the first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state and improving the signal quality during communication.

[0335] In some embodiments, the channel and / or signal includes at least one of the following: PDCCH; DMRS corresponding to PDCCH; PUCCH; DMRS corresponding to PUCCH; PDSCH; DMRS corresponding to PDSCH; PUSCH; DMRS corresponding to PUSCH; SRS; CSI-RS; PRS; TRS.

[0336] The present disclosure provides a variety of channel and signal implementation methods so that network devices and terminals can uniformly use the same TCI state to send and / or receive corresponding channels and / or signals under the first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state and improving the signal quality during communication.

[0337] In some embodiments, any channel and / or signal includes a PDCCH, the PDCCH corresponds to a first CORESET, and the first CORESET is configured to use multiple sets of TCI states for communication; for any channel and / or signal, a set of TCI states is used for communication, including: under a first condition, for the PDCCH corresponding to the first CORESET, a set of TCI states is used for communication; or, under the first condition, PDCCH candidates on the first CORESET are not detected.

[0338] The present disclosure provides an implementation method for using a set of TCI states for PDCCH communication, so that network equipment and terminals can uniformly use the same TCI state to send and / or receive corresponding channels and / or signals under a first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state and improving the signal quality during communication.

[0339] In some embodiments, any channel and / or signal includes a PDCCH, the PDCCH includes PDCCH candidates on multiple search space sets, and the multiple search space sets are configured as a link relationship; for any channel and / or signal, a set of TCI states are used for communication, including: under a first condition, detecting PDCCH candidates on a search space set with a set of TCI states indicated by second information in multiple search space sets; or, under the first condition, not detecting PDCCH candidates on multiple search space sets.

[0340] The present disclosure provides an implementation method for using a set of TCI states for communication on PDCCH, so that network equipment and terminals can uniformly use the same TCI state to send and / or receive corresponding channels and / or signals under a first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state, and improving the signal quality during communication.

[0341] In some embodiments, any channel and / or signal includes a second channel and / or a second signal, and the second channel and / or the second signal includes at least one of PDSCH, PUSCH, DMRS corresponding to PDSCH, and DMRS corresponding to PUSCH; under the first condition, the terminal does not expect the DCI indication field to indicate the sending and / or receiving of the second channel and / or the second signal based on multiple sets of TCI states.

[0342] The present disclosure provides an implementation method for using a set of TCI states for communication for some channels and / or signals, so that network devices and terminals can uniformly use the same TCI state to send and / or receive corresponding channels and / or signals under a first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state, and improving the signal quality during communication.

[0343] In some embodiments, any channel and / or signal includes a third channel and / or a third signal, and the third channel and / or the third signal includes at least one of PDSCH, PUSCH, DMRS corresponding to PDSCH, and DMRS corresponding to PUSCH. Based on predefined rules, it is determined that the third channel and / or the third signal adopts multiple sets of TCI states for communication; for any channel and / or signal, a set of TCI states is adopted for communication, including: under a first condition, for the third channel and / or the third signal, a set of TCI states is adopted for communication; or, under the first condition, the third channel and / or the third signal is not sent and / or received.

[0344] The present disclosure provides an implementation method for using a set of TCI states for communication for some channels and / or signals, so that network devices and terminals can uniformly use the same TCI state to send and / or receive corresponding channels and / or signals under a first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state, and improving the signal quality during communication.

[0345] In some embodiments, under the first condition, the first channel and / or the first signal uses multiple sets of TCI states for communication, including: a set of TCI states indicated by the second information is a first set of TCI states, and the terminal maintains TCI states other than the first set of TCI states.

[0346] The present disclosure also provides a method for updating the TCI state so that network devices and terminals can uniformly use the same TCI state to send and / or receive corresponding channels and / or signals under the first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state and improving the signal quality during communication.

[0347] In some embodiments, the multi-TRP communication method based on S-DCI indication includes at least one of the following: SDM scheme; FDM scheme; TDM scheme; SFN scheme.

[0348] The present disclosure provides multiple expressions of the multi-TRP communication method based on S-DCI indication, so that network equipment and terminals can uniformly use the same TCI state to send and / or receive corresponding channels and / or signals under the first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state and improving the signal quality during communication.

[0349] In some implementations, the unified TCI state includes at least one of the following: an uplink TCI state; a downlink TCI state; and a joint TCI state, wherein the joint TCI state is used for both uplink and downlink communications.

[0350] The present disclosure can adapt to scenarios with different unified TCI status indications, so that network devices and terminals can, under the first condition, uniformly use the same TCI status to send and / or receive corresponding channels and / or signals, thereby improving the efficiency of multi-TRP communications based on the unified TCI status, and improving the signal quality during communication.

[0351] Figure 7 is a schematic diagram of another communication device according to an exemplary embodiment. Referring to Figure 7 , the device 300 includes a receiving module 301 configured to receive first information indicating terminal capabilities. The first information indicates at least one of the following capabilities: the terminal's ability to communicate using a set of TCI states under a first condition; or the terminal's ability to communicate using multiple TCI states under a first condition.

[0352] The present disclosure enables the terminal to report the communication capabilities supported by its own device, so that the network device and the terminal can uniformly use the same TCI state for communication, thereby improving the efficiency of multi-TRP communication based on the unified TCI state and improving the signal quality during communication.

[0353] In some embodiments, at least one channel and / or signal sent and / or received by the network device is configured to adopt a multi-TRP communication method based on S-DCI indication; the device 300 also includes: a sending module 302, used to send second information, the second information is used to indicate a unified TCI state; wherein the first condition includes: the unified TCI state indicated by the second information is a set of unified TCI states.

[0354] The present disclosure provides a possible first condition for a terminal to report the communication capabilities supported by the terminal under the first condition. This allows the network device and the terminal to uniformly use the same TCI state for communication under the first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state and improving the signal quality during communication.

[0355] In some embodiments, the device 300 also includes: a processing module 303, used to configure multiple sets of TCI states; the processing module 303 is also used to configure the terminal to use a set of TCI states for communication under the first condition, or to use multiple sets of TCI states for communication; the sending module 302 is also used to send third information, and the third information is used to indicate that the terminal uses a set of TCI states for communication under the first condition, or to use multiple sets of TCI states for communication; and / or, the processing module 303 is also used to determine based on predefined rules that the terminal uses a set of TCI states for communication under the first condition, or to use multiple sets of TCI states for communication; wherein, using a set of TCI states for communication means using a set of unified TCI states indicated by the second information for communication; using multiple sets of TCI states for communication means using a set of unified TCI states indicated by the second information to update multiple sets of TCI states, and communicating based on the updated multiple sets of TCI states.

[0356] The present disclosure provides multiple communication modes for terminals under the first condition, so that network equipment and terminals can uniformly use the same TCI state to communicate under the first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state and improving the signal quality during communication.

[0357] In some embodiments, using a set of TCI states for communication includes: using a set of TCI states for communication for any channel and / or signal.

[0358] The present disclosure provides a specific implementation method for communicating using a set of TCI states, so that network devices and terminals can uniformly use the same TCI state for communication under the first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state and improving the signal quality during communication.

[0359] In some embodiments, any channel and / or signal includes a first channel and / or a first signal, and the first channel and / or the first signal are configured to adopt a multi-TRP transmission method based on the S-DCI indication; and adopt multiple sets of TCI states for communication, including: under a first condition, the first channel and / or the first signal adopts multiple sets of TCI states for communication.

[0360] The present disclosure provides a specific implementation method for communicating using multiple sets of TCI states, so that network devices and terminals can uniformly use the same TCI state for communication under the first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state and improving the signal quality during communication.

[0361] In some embodiments, the channel and / or signal includes at least one of the following: PDCCH; DMRS corresponding to PDCCH; PUCCH; DMRS corresponding to PUCCH; PDSCH; DMRS corresponding to PDSCH; PUSCH; DMRS corresponding to PUSCH; SRS; CSI-RS; PRS; TRS.

[0362] The present disclosure provides a variety of channel and signal implementation methods so that network devices and terminals can uniformly use the same TCI state to send and / or receive corresponding channels and / or signals under the first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state and improving the signal quality during communication.

[0363] In some embodiments, any channel and / or signal includes a PDCCH, the PDCCH corresponds to a first CORESET, and the first CORESET is configured to use multiple sets of TCI states for communication; for any channel and / or signal, a set of TCI states is used for communication, including: under a first condition, for the PDCCH corresponding to the first CORESET, a set of TCI states is used for communication; or, under the first condition, it is determined that the terminal does not detect the PDCCH candidate on the first CORESET.

[0364] The present disclosure provides an implementation method for using a set of TCI states for communication on PDCCH, so that network equipment and terminals can uniformly use the same TCI state to send and / or receive corresponding channels and / or signals under a first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state, and improving the signal quality during communication.

[0365] In some embodiments, any channel and / or signal includes a PDCCH, the PDCCH includes PDCCH candidates on multiple search space sets, and the multiple search space sets are configured as a link relationship; for any channel and / or signal, a set of TCI states are used for communication, including: under a first condition, determining that the terminal detects PDCCH candidates on a search space set with a set of TCI states indicated by second information in multiple search space sets; or, under the first condition, determining that the terminal does not detect PDCCH candidates on multiple search space sets.

[0366] The present disclosure provides an implementation method for using a set of TCI states for communication on PDCCH, so that network equipment and terminals can uniformly use the same TCI state to send and / or receive corresponding channels and / or signals under a first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state, and improving the signal quality during communication.

[0367] In some embodiments, any channel and / or signal includes a second channel and / or a second signal, and the second channel and / or the second signal includes at least one of PDSCH, PUSCH, DMRS corresponding to PDSCH, and DMRS corresponding to PUSCH; under the first condition, the DCI indication field does not indicate the sending and / or receiving of the second channel and / or the second signal based on multiple sets of TCI states.

[0368] The present disclosure provides an implementation method for using a set of TCI states for communication for some channels and / or signals, so that network devices and terminals can uniformly use the same TCI state to send and / or receive corresponding channels and / or signals under a first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state, and improving the signal quality during communication.

[0369] In some embodiments, any channel and / or signal includes a third channel and / or a third signal, and the third channel and / or the third signal includes at least one of PDSCH, PUSCH, DMRS corresponding to PDSCH, and DMRS corresponding to PUSCH. Based on predefined rules, it is determined that the third channel and / or the third signal adopts multiple sets of TCI states for communication; for any channel and / or signal, a set of TCI states is adopted for communication, including: under a first condition, for the third channel and / or the third signal, a set of TCI states is adopted for communication; or, under the first condition, the third channel and / or the third signal is not sent and / or received.

[0370] The present disclosure provides an implementation method for using a set of TCI states for communication for some channels and / or signals, so that network devices and terminals can uniformly use the same TCI state to send and / or receive corresponding channels and / or signals under a first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state, and improving the signal quality during communication.

[0371] In some embodiments, under a first condition, the first channel and / or the first signal uses multiple sets of TCI states for communication, including: a set of TCI states indicated by the second information is a first set of TCI states, and determining that the terminal maintains a TCI state other than the first set of TCI states.

[0372] The present disclosure also provides a method for updating the TCI state so that network devices and terminals can uniformly use the same TCI state to send and / or receive corresponding channels and / or signals under the first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state and improving the signal quality during communication.

[0373] In some embodiments, the multi-TRP communication method based on S-DCI indication includes at least one of the following: SDM scheme; FDM scheme; TDM scheme; SFN scheme.

[0374] The present disclosure provides multiple expressions of the multi-TRP communication method based on S-DCI indication, so that network equipment and terminals can uniformly use the same TCI state to send and / or receive corresponding channels and / or signals under the first condition, thereby improving the efficiency of multi-TRP communication based on the unified TCI state and improving the signal quality during communication.

[0375] In some implementations, the unified TCI state includes at least one of the following: an uplink TCI state; a downlink TCI state; and a joint TCI state, wherein the joint TCI state is used for both uplink and downlink communications.

[0376] The present disclosure can adapt to scenarios with different unified TCI status indications, so that network devices and terminals can, under the first condition, uniformly use the same TCI status to send and / or receive corresponding channels and / or signals, thereby improving the efficiency of multi-TRP communications based on the unified TCI status, and improving the signal quality during communication.

[0377] Regarding the apparatus in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0378] Figure 8 is a schematic diagram of a communication device according to an exemplary embodiment. For example, device 400 can be any terminal such as a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

[0379] 8 , device 400 may include one or more of the following components: a processing component 402 , a memory 404 , a power component 406 , a multimedia component 408 , an audio component 410 , an input / output (I / O) interface 412 , a sensor component 414 , and a communication component 416 .

[0380] Processing component 402 generally controls the overall operation of device 400, such as operations associated with display, phone calls, data communications, camera operation, and recording operations. Processing component 402 may include one or more processors 420 to execute instructions to perform all or part of the steps of the above-described method. In addition, processing component 402 may include one or more modules to facilitate interaction between processing component 402 and other components. For example, processing component 402 may include a multimedia module to facilitate interaction between multimedia component 408 and processing component 402.

[0381] The memory 404 is configured to store various types of data to support operations on the device 400. Examples of such data include instructions for any application or method operating on the device 400, contact data, phone book data, messages, pictures, videos, etc. The memory 404 can be implemented by any type of volatile or non-volatile storage device, or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk, or optical disk.

[0382] The power component 406 provides power to the various components of the device 400. The power component 406 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to the device 400.

[0383] The multimedia component 408 includes a screen that provides an output interface between the device 400 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen can be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor can not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 408 includes a front camera and / or a rear camera. When the device 400 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera can receive external multimedia data. Each front camera and rear camera can be a fixed optical lens system or have a focal length and optical zoom capability.

[0384] The audio component 410 is configured to output and / or input audio signals. For example, the audio component 410 includes a microphone (MIC) that is configured to receive external audio signals when the device 400 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signal can be further stored in the memory 404 or transmitted via the communication component 416. In some embodiments, the audio component 410 also includes a speaker for outputting audio signals.

[0385] I / O interface 412 provides an interface between processing component 402 and peripheral interface modules, such as a keyboard, click wheel, buttons, etc. These buttons may include but are not limited to: a home button, volume buttons, a start button, and a lock button.

[0386] The sensor assembly 414 includes one or more sensors for providing various aspects of the status assessment of the device 400. For example, the sensor assembly 414 can detect the open / closed state of the device 400, the relative positioning of components, such as the display and keypad of the device 400. The sensor assembly 414 can also detect changes in the position of the device 400 or a component of the device 400, the presence or absence of user contact with the device 400, the orientation or acceleration / deceleration of the device 400, and temperature changes of the device 400. The sensor assembly 414 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 414 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 414 may also include an accelerometer, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0387] The communication component 416 is configured to facilitate wired or wireless communication between the device 400 and other devices. The device 400 can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 416 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 416 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[0388] In an exemplary embodiment, the device 400 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the above-described methods.

[0389] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 404 including instructions, which can be executed by the processor 420 of the device 400 to perform the above method. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0390] FIG9 is a schematic diagram of another communication device according to an exemplary embodiment. For example, device 500 may be provided as a base station or a server. Referring to FIG9 , device 500 includes a processing component 522, which further includes one or more processors, and memory resources represented by memory 532 for storing instructions executable by processing component 522, such as applications. The applications stored in memory 532 may include one or more modules, each corresponding to a set of instructions. Furthermore, processing component 522 is configured to execute the instructions to perform the above-described method.

[0391] The device 500 may also include a power supply component 526 configured to perform power management of the device 500, a wired or wireless network interface 550 configured to connect the device 500 to a network, and an input / output (I / O) interface 558. The device 500 may operate based on an operating system stored in the memory 532, such as Windows Server™, Mac OS X™, Unix™, Linux™, FreeBSD™, or the like.

[0392] This disclosure proposes terminal behavior for M-TRP PDCCH SFN CORESETs when the number of indicated TCI states differs, such as when the second information indicates a set of TCI states. This allows the terminal and network equipment to maintain consistent understanding of TCI state adoption. The terminal and network equipment uniformly use the same indicated TCI state for communication or for determining not to communicate, thereby improving the signal quality of M-TRP transmissions based on the indicated TCI state.

[0393] It is further understood that in the present disclosure, "plurality" refers to two or more than two, and other quantifiers are similar. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the related objects before and after are in an "or" relationship. The singular forms "a", "the" and "the" are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0394] It will be further understood that the terms "first," "second," and the like are used to describe various types of information, but such information should not be limited to these terms. These terms are used solely to distinguish information of the same type from one another and do not indicate a particular order or level of importance. In fact, the terms "first," "second," and the like are fully interchangeable. For example, first information could be referred to as second information, and similarly, second information could be referred to as first information without departing from the scope of this disclosure.

[0395] It is further understood that the meanings of words such as "in response to" and "if" involved in this disclosure depend on the context and the actual usage scenarios. For example, the word "in response to" used herein can be interpreted as "at..." or "when..." or "if" or "if".

[0396] It is further understood that although operations are described in a particular order in the drawings in the embodiments of the present disclosure, this should not be construed as requiring that the operations be performed in the particular order shown or in a serial order, or that all of the operations shown be performed to obtain the desired results. In certain circumstances, multitasking and parallel processing may be advantageous.

[0397] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein.

[0398] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the scope of the appended claims.

Claims

1. A communication method, characterized in that: The method is executed by a terminal, and includes: Sending first information, where the first information indicates the capability of the terminal; The first information is used to indicate at least one of the following capabilities: Under the first condition, the terminal has the ability to communicate using a set of transmission configuration indication TCI states; The first condition is the ability of the terminal to communicate using multiple sets of TCI states.

2. The method according to claim 1, characterized in that At least one channel and / or signal sent and / or received by the terminal is configured to adopt a multi-transmission and reception point TRP communication method based on single downlink control information S-DCI indication; The method further comprises: receiving second information, where the second information is used to indicate a unified TCI state; Among them, the first condition is that the unified TCI state indicated by the second information is a set of unified TCI states.

3. The method according to claim 2, characterized in that The method further comprises: Determine multiple sets of TCI status; At least one of the following methods is used to determine whether the terminal uses one set of TCI states for communication or uses multiple sets of TCI states for communication: receiving third information, where the third information is used to instruct the terminal to communicate using one set of TCI states or multiple sets of TCI states under the first condition; Determining, based on a predefined rule, that the terminal, under the first condition, uses one set of TCI states for communication, or uses multiple sets of TCI states for communication; Among them, using a set of TCI states for communication means using a set of unified TCI states indicated by the second information for communication; using multiple sets of TCI states for communication means using a set of unified TCI states indicated by the second information to update the multiple sets of TCI states, and communicating based on the updated multiple sets of TCI states.

4. The method according to claim 3, characterized in that The communication is performed using a set of TCI states, including: For any channel and / or signal, a set of TCI states are used for communication.

5. The method according to claim 3, characterized in that: The arbitrary channel and / or signal includes a first channel and / or a first signal, and the first channel and / or the first signal are configured to adopt a multi-TRP transmission method based on an S-DCI indication; The communication using multiple sets of TCI states includes: Under the first condition, the first channel and / or the first signal communicate using multiple sets of TCI states.

6. The method according to claim 4 or 5, characterized in that: The channel and / or the signal comprises at least one of the following: Physical downlink control channel PDCCH; Demodulation reference signal DMRS corresponding to PDCCH; Physical uplink control channel PUCCH; DMRS corresponding to PUCCH; Physical downlink shared channel PDSCH; DMRS corresponding to PDSCH; Physical uplink shared channel PUSCH; DMRS corresponding to PUSCH; Sounding reference signal SRS; Channel state information reference signal CSI-RS; Positioning reference signal PRS; Time-frequency tracking reference signal TRS.

7. The method according to claim 4, characterized in that The arbitrary channel and / or signal includes a PDCCH, the PDCCH corresponds to a first control resource set CORESET, and the first CORESET is configured to communicate using multiple sets of TCI states; For any channel and / or signal, the set of TCI states are used for communication, including: Under the first condition, for the PDCCH corresponding to the first CORESET, a set of TCI states are used for communication; or, Under the first condition, PDCCH candidates on the first CORESET are not detected.

8. The method according to claim 4, characterized in that The arbitrary channel and / or signal includes a PDCCH, the PDCCH includes PDCCH candidates on a plurality of search space sets, and the plurality of search space sets are configured to be linked; For any channel and / or signal, the set of TCI states are used for communication, including: Under the first condition, detecting PDCCH candidates on a search space set of a set of TCI states indicated by the second information in a plurality of search space sets; or, Under the first condition, PDCCH candidates on the multiple search space sets are not detected.

9. The method according to claim 4, characterized in that The arbitrary channel and / or signal includes a second channel and / or a second signal, and the second channel and / or the second signal includes at least one of a PDSCH, a PUSCH, a DMRS corresponding to the PDSCH, and a DMRS corresponding to the PUSCH; Under the first condition, the terminal does not expect the DCI indication field to indicate that the terminal sends and / or receives data based on multiple sets of TCI states. Receive the second channel and / or the second signal.

10. The method according to claim 4, characterized in that The arbitrary channel and / or signal includes a third channel and / or a third signal, the third channel and / or the third signal includes at least one of a PDSCH, a PUSCH, a DMRS corresponding to the PDSCH, and a DMRS corresponding to the PUSCH, and determining based on a predefined rule that the third channel and / or the third signal uses multiple sets of TCI states for communication; For any channel and / or signal, a set of TCI states are used for communication, including: Under the first condition, for the third channel and / or the third signal, a set of TCI states are used for communication; or, Under the first condition, the third channel and / or the third signal are not transmitted and / or received.

11. The method according to claim 5, characterized in that The first channel and / or the first signal communicate using multiple sets of TCI states under the first condition, including: The set of TCI states indicated by the second information is a first set of TCI states, and the terminal maintains TCI states other than the first set of TCI states.

12. The method according to claim 2, characterized in that: The multi-TRP communication method based on S-DCI indication includes at least one of the following: Space Division Multiplexing SDM solution; Frequency division multiplexing FDM scheme; Time Division Multiplexing TDM solution; Single frequency network SFN solution.

13. The method according to claim 2, characterized in that The unified TCI status includes at least one of the following: Uplink TCI status; Downlink TCI status; A joint TCI state, wherein the joint TCI state is used for both uplink communication and downlink communication.

14. A communication method, characterized in that: The method is performed by a network device and includes: receiving first information, wherein the first information indicates a capability of the terminal; The first information is used to indicate at least one of the following capabilities: Under the first condition, the terminal has the ability to communicate using a set of transmission configuration indication TCI states; The first condition is the ability of the terminal to communicate using multiple sets of TCI states.

15. The method according to claim 14, characterized in that At least one channel and / or signal sent and / or received by the network device is configured to adopt a multi-transmission and reception point TRP communication method based on a single downlink control information S-DCI indication; The method further comprises: sending second information, where the second information is used to indicate a unified TCI state; Among them, the first condition is that the unified TCI state indicated by the second information is a set of unified TCI states.

16. The method according to claim 15, characterized in that The method further comprises: Configure multiple sets of TCI status; Configuring the terminal to communicate using one set of TCI states or multiple sets of TCI states under the first condition; sending third information, where the third information is used to indicate that the terminal uses one set of TCI states or multiple sets of TCI states to communicate under the first condition; and / or, Determining, based on a predefined rule, that the terminal, under the first condition, uses one set of TCI states for communication, or uses multiple sets of TCI states for communication; Among them, using a set of TCI states for communication means using a set of unified TCI states indicated by the second information for communication; using multiple sets of TCI states for communication means using a set of unified TCI states indicated by the second information to update the multiple sets of TCI states, and communicating based on the updated multiple sets of TCI states.

17. The method according to claim 16, characterized in that The communication is performed using a set of TCI states, including: For any channel and / or signal, a set of TCI states are used for communication.

18. The method according to claim 16, characterized in that The arbitrary channel and / or signal includes a first channel and / or a first signal, and the first channel and / or the first signal are configured to adopt a multi-TRP transmission method based on an S-DCI indication; The communication using multiple sets of TCI states includes: Under the first condition, the first channel and / or the first signal communicate using multiple sets of TCI states.

19. The method according to claim 17 or 18, characterized in that The channel and / or the signal comprises at least one of the following: Physical downlink control channel PDCCH; Demodulation reference signal DMRS corresponding to PDCCH; Physical uplink control channel PUCCH; DMRS corresponding to PUCCH; Physical downlink shared channel PDSCH; DMRS corresponding to PDSCH; Physical uplink shared channel PUSCH; DMRS corresponding to PUSCH; Sounding reference signal SRS; Channel state information reference signal CSI-RS; Positioning reference signal PRS; Time-frequency tracking reference signal TRS.

20. The method according to claim 17, characterized in that The arbitrary channel and / or signal includes a PDCCH, the PDCCH corresponds to a first control resource set CORESET, and the first CORESET is configured to communicate using multiple sets of TCI states; For any channel and / or signal, the set of TCI states are used for communication, including: Under the first condition, for the PDCCH corresponding to the first CORESET, a set of TCI states are used for communication; or, Under the first condition, it is determined that the terminal does not detect a PDCCH candidate on the first CORESET.

21. The method according to claim 17, characterized in thatThe arbitrary channel and / or signal includes a PDCCH, the PDCCH includes PDCCH candidates on a plurality of search space sets, and the plurality of search space sets are configured to be linked; For any channel and / or signal, the set of TCI states are used for communication, including: Under the first condition, determining that the terminal detects PDCCH candidates on a search space set of a set of TCI states indicated by the second information in a plurality of search space sets; or, Under the first condition, it is determined that the terminal does not detect PDCCH candidates on the multiple search space sets.

22. The method according to claim 17, characterized in that The arbitrary channel and / or signal includes a second channel and / or a second signal, and the second channel and / or the second signal includes at least one of a PDSCH, a PUSCH, a DMRS corresponding to the PDSCH, and a DMRS corresponding to the PUSCH; Under the first condition, the DCI indication field does not indicate sending and / or receiving the second channel and / or second signal based on multiple sets of TCI states.

23. The method according to claim 17, characterized in that The arbitrary channel and / or signal includes a third channel and / or a third signal, the third channel and / or the third signal includes at least one of a PDSCH, a PUSCH, a DMRS corresponding to the PDSCH, and a DMRS corresponding to the PUSCH, and determining based on a predefined rule that the third channel and / or the third signal uses multiple sets of TCI states for communication; For any channel and / or signal, a set of TCI states are used for communication, including: Under the first condition, for the third channel and / or the third signal, a set of TCI states are used for communication; or, Under the first condition, the third channel and / or the third signal are not transmitted and / or received.

24. The method according to claim 18, characterized in that The first channel and / or the first signal communicate using multiple sets of TCI states under the first condition, including: The set of TCI states indicated by the second information is a first set of TCI states, and it is determined that the terminal maintains a TCI state other than the first set of TCI states.

25. The method according to claim 15, characterized in that The multi-TRP communication method based on S-DCI indication includes at least one of the following: Space Division Multiplexing SDM solution; Frequency division multiplexing FDM scheme; Time Division Multiplexing TDM solution; Single frequency network SFN solution.

26. The method according to claim 15, characterized in that The unified TCI status includes at least one of the following: Uplink TCI status; Downlink TCI status; A joint TCI state, wherein the joint TCI state is used for both uplink communication and downlink communication.

27. A communication device, characterized in that: The device comprises: A sending module, configured to send first information, where the first information indicates the capability of the terminal; The first information is used to indicate at least one of the following capabilities: Under the first condition, the terminal has the ability to communicate using a set of transmission configuration indication TCI states; The first condition is the ability of the terminal to communicate using multiple sets of TCI states.

28. A communication device, characterized in that: The device comprises: A receiving module, configured to receive first information, where the first information indicates a capability of the terminal; The first information is used to indicate at least one of the following capabilities: Under the first condition, the terminal has the ability to communicate using a set of transmission configuration indication TCI states; The first condition is the ability of the terminal to communicate using multiple sets of TCI states.

29. A communication device, characterized in that: include: processor; a memory for storing processor-executable instructions; Wherein, the processor is configured to: execute the method described in any one of claims 1 to 13.

30. A communication device, characterized in that: include: processor; a memory for storing processor-executable instructions; Wherein, the processor is configured to: execute the method described in any one of claims 14 to 26.

31. A non-transitory computer-readable storage medium, characterized in that When the instructions in the storage medium are executed by a processor of a terminal, the terminal is enabled to execute the method according to any one of claims 1 to 13.

32. A non-transitory computer-readable storage medium, characterized in that When the instructions in the storage medium are executed by a processor of a network device, the network device is enabled to execute the method according to any one of claims 14 to 26.

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