Control channel transmission method, apparatus, device, and storage medium

Abstract

A control channel transmission method, device, equipment and storage medium belong to the mobile communication technical field. The method is executed by a first device, including: receiving indication information (310), the indication information is used for indicating a first demodulation reference signal (DMRS) mode or a first control channel type, the first control channel type corresponds to the first DMRS mode, the first DMRS mode is one of multiple DMRS modes, and the transmission (320) of the control channel is carried out according to the DMRS mode indicated by the indication information.

Description

Control channel transmission method, device, equipment and storage medium Technical Field

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

[0002] A demodulation reference signal (DMRS) is a reference signal used for uplink and downlink demodulation.

[0003] In related technologies, for a control channel, the DMRS therein is carried in a pre-configured resource location in the resources of the control channel.

[0004] Summary of the Invention

[0005] The embodiments of the present application provide a control channel transmission method, apparatus, device, and storage medium. The technical solution is as follows:

[0006] In one aspect, an embodiment of the present application provides a control channel transmission method, the method being performed by a first device, the method including:

[0007] receiving indication information, where the indication information is used to indicate a first demodulation reference signal (DMRS) pattern or a first control channel type, where the first control channel type corresponds to the first DMRS pattern; and the first DMRS pattern is one of multiple DMRS patterns;

[0008] The control channel is transmitted according to the DMRS mode indicated by the indication information.

[0009] In one aspect, an embodiment of the present application provides a control channel transmission method, the method being performed by a second device, the method including:

[0010] Send indication information to the first device, where the indication information is used to indicate a first demodulation reference signal DMRS mode or a first control channel type, where the first control channel type corresponds to the first DMRS mode; the first DMRS mode is one of multiple DMRS modes; the indication information is used to instruct the first device to transmit a control channel according to the DMRS mode indicated by the indication information.

[0011] On the other hand, an embodiment of the present application provides a control channel transmission device, the device comprising:

[0012] a receiving module, configured to receive indication information, where the indication information is used to indicate a first demodulation reference signal (DMRS) pattern or a first control channel type, where the first control channel type corresponds to the first DMRS pattern; and the first DMRS pattern is one of multiple DMRS patterns;

[0013] The transmission module is used to transmit the control channel according to the DMRS mode indicated by the indication information.

[0014] On the other hand, an embodiment of the present application provides a control channel transmission device, the device comprising:

[0015] A sending module is used to send indication information to a first device, where the indication information is used to indicate a first demodulation reference signal DMRS mode or a first control channel type, where the first control channel type corresponds to the first DMRS mode; the first DMRS mode is one of multiple DMRS modes; the indication information is used to instruct the first device to transmit a control channel according to the DMRS mode according to the indication information.

[0016] On the other hand, an embodiment of the present application provides a communication device, the communication device including a processor, a memory, and a transceiver;

[0017] The memory stores a computer program, and the processor executes the computer program to enable the communication device to implement the above control channel transmission method.

[0018] On the other hand, an embodiment of the present application further provides a computer-readable storage medium, in which a computer program is stored. The computer program is loaded and executed by a processor to implement the above-mentioned control channel transmission method.

[0019] On the other hand, the present application also provides a chip, which includes an integrated circuit and firmware set in the integrated circuit, and the chip is used to run in a communication device so that the communication device executes the above-mentioned control channel transmission method.

[0020] In another aspect, the present application provides a computer program product, comprising computer instructions stored in a computer-readable storage medium. A processor of a communication device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the communication device to perform the control channel transmission method described above.

[0021] On the other hand, the present application provides a computer program, which is executed by a processor of a communication device to implement the above-mentioned control channel transmission method.

[0022] An embodiment of the present application provides a control channel transmission scheme, wherein a first device can receive indication information for indicating a first DMRS mode among multiple DMRS modes, or an indication information for indicating a first control channel type corresponding to the first DMRS mode. When the control channel is subsequently transmitted, the control channel is transmitted according to the DMRS mode indicated by the indication information, thereby ensuring the flexibility of DMRS transmission in the control channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG1 is a schematic diagram of the architecture of a communication system provided by an embodiment of the present application;

[0024] FIG2 is a schematic diagram of DMRS types involved in this application;

[0025] FIG3 is a flow chart of a control channel transmission method provided by one embodiment of the present application;

[0026] FIG4 is a flowchart of a control channel transmission method provided by an embodiment of the present application;

[0027] FIG5 is a flowchart of a control channel transmission method provided by one embodiment of the present application;

[0028] FIG6 is a flowchart of a control channel transmission method provided by an embodiment of the present application;

[0029] FIG7 is a block diagram of a control channel transmission device provided by one embodiment of the present application;

[0030] FIG8 is a block diagram of a control channel transmission device provided by one embodiment of the present application;

[0031] FIG9 is a schematic structural diagram of a communication device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0032] 1 shows a schematic diagram of a communication system according to an exemplary embodiment of the present application, which includes a network device 110 and a terminal device 120, and / or a terminal device 120 and a terminal device 130, which are not limited in the present application.

[0033] The network device 110 in the present application provides wireless communication functions, and the network device 110 includes but is not limited to: Evolved Node B (eNB), Radio Network Controller (RNC), Node B (NB), Base Station Controller (BSC), Base Transceiver Station (BTS), Home Base Station (e.g., Home Evolved Node B, or Home Node B, HNB), Baseband Unit (BBU), Access Point (AP) in Wireless Fidelity (Wi-Fi) system, Wireless Relay Node, Wireless Backhaul Node, Transmission Point (TP) or Transmission and Reception Point (TRP), etc., and can also be the Next Generation Node B (NGNB) in the 5th Generation (5G) mobile communication system. The term "gNB" refers to a base station (B, gNB) or a transmission point (TRP or TP), or one or a group of antenna panels (including multiple antenna panels) of a base station in a 5G system, or a network node constituting a gNB or a transmission point, such as a baseband unit (BBU) or a distributed unit (DU), or a base station in a Beyond Fifth Generation (B5G) or a 6th Generation (6G) mobile communication system, or a core network (CN), fronthaul, backhaul, radio access network (RAN), network slicing, or a serving cell, primary cell (PCell), primary secondary cell (PSCell), special cell (SpCell), secondary cell (SCell), or neighboring cell of a terminal device.

[0034] The terminal device 120 and / or terminal device 130 in this application are also called user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, and user device. The terminals include, but are not limited to, handheld devices, wearable devices, vehicle-mounted devices, and Internet of Things devices, such as mobile phones, tablet computers, e-book readers, laptop computers, desktop computers, televisions, game consoles, mobile Internet devices (MIDs), augmented reality (AR) terminals, virtual reality (VR) terminals, and mixed reality (MR) terminals, wearable devices, handles, electronic tags, controllers, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical care, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, wireless terminals in remote medical surgery, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loops (WLANs), and wireless terminals in industrial control. Loop (WLL) stations, personal digital assistants (PDA), TV set-top boxes (STB), customer premises equipment (CPE), etc.

[0035] The network device 110 and the terminal device 120 communicate with each other via some air interface technology, such as a Uu interface.

[0036] Exemplarily, there are two communication scenarios between the network device 110 and the terminal device 120: an uplink communication scenario and a downlink communication scenario. Uplink communication refers to sending signals to the network device 110; downlink communication refers to sending signals to the terminal device 120.

[0037] The terminal device 120 and the terminal device 130 communicate with each other via some air interface technology, such as a PC5 interface.

[0038] In some embodiments, there are two communication scenarios between the terminal device 120 and the terminal device 130: a first sideline communication scenario and a second sideline communication scenario. The first sideline communication refers to sending signals to the terminal device 130; the second sideline communication refers to sending signals to the terminal device 120.

[0039] Terminal device 120 and terminal device 130 are both within the network coverage and located in the same cell, or terminal device 120 and terminal device 130 are both within the network coverage but located in different cells, or terminal device 120 is within the network coverage but terminal device 130 is outside the network coverage.

[0040] The technical solutions provided in the embodiments of the present application can be applied to various communication systems, such as: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, Advanced Long Term Evolution (LTE-A) system, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, 5G mobile communication system, New Radio (NR) system, NR system evolution system, LTE on unlicensed spectrum (LTE-U) system, NR on unlicensed spectrum (NR-based access to unlicensed spectrum) system. Unlicensed spectrum, NR-U) system, terrestrial communication network (Terrestrial Networks, TN) system, non-terrestrial communication network (Non-Terrestrial Networks, NTN) system, wireless local area network (Wireless Local Area Networks, WLAN), wireless fidelity (Wireless Fidelity, Wi-Fi), cellular Internet of Things system, cellular passive Internet of Things system, can also be applied to the subsequent evolution system of the 5G NR system, and can also be applied to B5G, 6G and subsequent evolution systems. In some embodiments of the present application, "NR" may also be referred to as a 5G NR system or a 5G system. Among them, the 5G mobile communication system may include non-standalone networking (NSA) and / or standalone networking (SA).

[0041] The technical solutions provided in the embodiments of the present application can also be applied to machine type communication (MTC), long term evolution technology for machine-to-machine communication (LTE-M), device-to-device (D2D) network, machine-to-machine (M2M) network, Internet of Things (IoT) network or other networks. Among them, the IoT network can include, for example, the Internet of Vehicles. Among them, the communication mode in the Internet of Vehicles system is collectively referred to as vehicle to other devices (Vehicle to X, V2X, X can represent anything), for example, the V2X can include: vehicle to vehicle (V2V) communication, vehicle to infrastructure (V2I) communication, vehicle to pedestrian communication (V2P) or vehicle to network (V2N) communication, etc.

[0042] 1)DMRS

[0043] In wireless communication systems (such as Wi-Fi, 4G (LTE), 5G (NR), and future 6G, etc.), the basic workflow can include the following steps:

[0044] At the transmitter, the bit stream information to be transmitted undergoes channel coding (possibly with corresponding rate matching) to obtain coded bits, which are then modulated to obtain modulation symbols (for example, the modulation may use one or more of Binary Phase Shift Keying (BPSK), Quadrature Phase Shift Keying (QPSK), 16-symbol Quadrature Amplitude Modulation (16QAM), 64QAM, 256QAM, 512QAM, 1024QAM, 2048QAM, and 4096QAM). The modulation symbols and demodulation reference signals (DMRS) are then inserted into the corresponding time-frequency resources (for example, into the corresponding resource elements (REs)). After subsequent processing, Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single-carrier Frequency-Division Multiple Access (SC-FDMA) symbols, or other forms of multi-carrier symbols are obtained.

[0045] At the receiving end, the receiver measures the DMRS channel to estimate the channel, demodulates the modulation symbols, and then performs channel decoding to obtain the transmitted bits. These steps can be combined and iterated (for example, the information obtained by the decoding module can be used in the module involving channel estimation and / or the module involving modulation symbol demodulation). The above order does not necessarily need to be strict.

[0046] The above process is similar for downlink (DL) transmission (network-to-terminal transmission), uplink (UL) transmission (terminal-to-network transmission), and sidelink (SL) transmission (terminal-to-terminal transmission). To obtain the bit information transmitted by the transmitter, the receiver needs to use a demodulation reference signal. This transmission can be either data or control information. For example, it can be the transmission of channels such as the Physical Downlink Shared Channel (PDSCH), the Physical Uplink Shared Channel (PUSCH), the Physical Sidelink Shared Channel (PSSCH), the Physical Downlink Control Channel (PDCCH), the Physical Uplink Control Channel (PUCCH), the Physical Sidelink Control Channel (PSCCH), and the Physical Sidelink Fedback Channel (PSFCH). In the subsequent solutions of this application, for simplicity of description, data is used in some places for description. The data here can include general data to be transmitted (such as data transmitted in PDSCH) and control information.

[0047] Due to the complexity and time-varying nature of the wireless channel environment, in the above-mentioned system, the receiver's estimation and recovery of the wireless channel directly affects the final data recovery performance. In traditional communication systems, the DMRS of the control channel (i.e., the channel that transmits control information) is generally relatively fixed, that is, its density and / or pattern does not need to change dynamically. In this case, the design of the DMRS will be relatively conservative, that is, it can adapt to various wireless channel environments. For the data channel (i.e., the channel that transmits data), in order to reduce DMRS overhead, different DMRS densities and / or patterns are often designed. The system configures or instructs the receiving end which DMRS to use based on the current wireless channel environment.

[0048] The following is a brief introduction using the data DMRS in the 5G (NR) system as an example.

[0049] In NR systems, DMRS can be divided into front-loaded DMRS (also known as front-loaded DL DMRS) and post-DMRS (also known as additional RS). For example, for high-speed UEs, additional RS can be added to the front-loaded DMRS to improve channel estimation performance. For example, additional DMRS can be sent at a later position in the allocated time domain resources. The front-loaded DMRS is typically located in the first few OFDM symbols of a time slot, while the post-DMRS pattern is a repetition of the front-loaded DMRS (e.g., using the same frequency domain resources or the same number of OFDM symbols) to ensure performance in high-speed scenarios. The front-loaded DMRS can consist of one or two OFDM symbols, configured by the network equipment. NR also supports two different DMRS types, Type 1 and Type 2, which use different resource allocation methods. In the figure below, each cell represents one resource block (RE). Twelve subcarriers in the frequency domain constitute one resource block (RB), and seven symbols in the time domain are used as an example.

[0050] Please refer to Figure 2, which shows a schematic diagram of the DMRS structure type involved in this application. As shown in Figure 2, for type 1 DMRS (as shown on the left side of Figure 2), two code division multiplexing (CDM) groups can be supported on one OFDM symbol of each physical resource block (PRB), and each CDM group contains 6 subcarriers. Each CDM group can support 2 ports, and the two ports are orthogonal through orthogonal cover codes (OCC), that is, the OCC code used by one port on different carriers is [+1+1+1+1+1+1], and the OCC code used by the other port is [+1-1+1-1+1-1]. In this way, type 1 DMRS can support up to 4 orthogonal ports on one OFDM symbol and up to 8 orthogonal ports on two OFDM symbols (TD-OCC is used between the two OFDM symbols). Specifically, the first CDM group of the first DMRS symbol includes ports {1000, 1001}, and the second CDM group includes ports {1002, 1003}; the first CDM group of the second DMRS symbol includes ports {1004, 1005}, and the second CDM group includes ports {1006, 1007}.

[0051] For Type 2 DMRS (as shown on the left side of Figure 2), three CDM groups can be supported on one OFDM symbol in each PRB, and each CDM group contains four adjacent subcarriers. Each CDM group can support two ports, and the two ports are orthogonalized by OCC, that is, the OCC code used by one port on a different carrier is [+1+1+1+1], and the OCC code used by the other port is [+1-1+1-1]. In this way, Type 2 DMRS can support up to 6 orthogonal ports on one OFDM symbol and up to 12 orthogonal ports on two OFDM symbols (TD-OCC is used between the two OFDM symbols). Specifically, the first CDM group of the first DMRS symbol includes ports {1000, 1001}, the second CDM group includes ports {1002, 1003}, and the third CDM group includes ports {1004, 1005}; the first CDM group of the second DMRS symbol includes ports {1006, 1007}, the second CDM group includes ports {1008, 1009}, and the third CDM group includes ports {1010, 1011}.

[0052] The explanation of RE and RB in Figure 2 is as follows:

[0053] RE: Resource Element (RE), the smallest unit of time-frequency resources in the system. For example, in NR or LTE systems, one RE corresponds to one subcarrier in the frequency domain and one symbol in the time domain.

[0054] RB: Resource Block, which can be for K consecutive subcarriers in the frequency domain. In addition, in some systems, RB can be for K consecutive subcarriers in the frequency domain and M consecutive symbols in the time domain. For example, K is typically 12, but can also be other values, such as 2 to the power of n, that is, K can be 8 or 16 or other values. M can typically be one or more of 6, 7, 13, or 14. In the following description, RBs and physical RBs (PRBs) may not be distinguished, and are collectively referred to as PRBs.

[0055] When referring to resources above, the symbols mentioned can correspond to one or more of the following:

[0056] OFDM symbols;

[0057] SC-FDMA symbol (also known as Discrete Fourier Transform-Spread-OFDM (DFT-s-OFDM) symbol, multi-carrier symbol with a transform precoder, or OFDM symbol with a transform precoder);

[0058] Other forms of multi-carrier symbols (i.e., symbols composed of multiple sub-carriers).

[0059] In related communication systems, DMRS and data occupy different REs (i.e., there is no overlap in RE time-frequency resources). In other words, a single RE can contain either DMRS or data, but not both. Therefore, data and DMRS are orthogonal in time-frequency resources (i.e., there is no overlap; this type of DMRS is referred to as orthogonal DMRS). When a terminal (UE) is moving at a high speed, in order to improve channel estimation performance, DMRS often needs to occupy more symbols in the time domain, meaning that DMRS needs to occupy more RE resources. Consequently, the RE resources available for data are reduced.

[0060] 2) 5G PUCCH DMRS

[0061] In the 5G system, PUCCH has different formats, such as PUCCH format 0, PUCCH format 1, PUCCH format 2, PUCCH format 3, and PUCCH format 4. For PUCCH format 0, it transmits relevant uplink control information via a sequence, so it does not require additional DMRS. For the other PUCCH formats (such as formats 1, 2, 3, and 4), additional DMRS is required, and the REs for transmitting uplink control information and the REs for DMRS are different REs. That is, for these PUCCH formats, orthogonal DMRS are also used. (To simplify the description, we refer to DMRS that do not overlap with REs for data (including control information) as orthogonal DMRS.)

[0062] On the one hand, in related communication systems, pilot signals and uplink control information occupy different time-frequency resources, meaning they are orthogonally placed on the time-frequency resources. Given a fixed total time-frequency transmission resource, the increased resource overhead required for pilot signals means less resources available for transmitting uplink control information, reducing the reliability of uplink control information transmission.

[0063] One way to solve the above problem is to allow the DMRS signal and the uplink control information to be transmitted on the same RE. At this time, advanced receivers (such as iterative receivers, artificial intelligence (AI) / machine learning (ML) receivers) can be used to process and demodulate the uplink control information. Among them, the AI / ML receiver can adopt various methods, such as deep learning algorithms. It can be implemented by using one or a combination of fully connected networks (FCN), convolutional neural networks (CNN), recurrent neural networks (RNN), and transformer neural network architectures. The above receiver is only an example, and the actual receiver is not limited to the above example.

[0064] The premise of adopting the above-mentioned advanced receiver is that the receiving end must know the corresponding reference signal configuration, otherwise it will cause the receiver to adapt to the actual received signal, resulting in performance degradation.

[0065] On the other hand, PUCCH DMRS is generally pre-agreed, which results in limited flexibility and makes the above DMRS solution suboptimal for some specific terminals. For example, some terminals may require a higher or lower DMRS density to achieve good performance depending on their actual wireless environment.

[0066] It should be noted that in a Code Division Multiple Access (CDMA) system, although pilot signals (including DMRS) and data signals (including data signals related to control information) can be transmitted on the same time-frequency resources, both pilot signals and data signals need to undergo additional spread spectrum processing. For example, pilot signals and data signals need to use different orthogonal codes to distinguish them. In other words, in the CDMA of the related art, the pilot signals and data signals transmitted on the same time-frequency resources are pilot signals and data signals after spread spectrum processing. The embodiments of the present application are mainly applied to OFDM systems / SC-FDMA systems, as well as other systems based on multiple sub-carriers. The modulation symbols of the data signal (such as QPSK, and 16QAM) and the modulation symbols of the demodulation pilot signal can be directly transmitted on the same time-frequency resources, and the pilot signal and data signal do not need to undergo additional spread spectrum processing. That is, in the solutions provided in the subsequent embodiments of the present application, the pilot signals and data signals transmitted on the same time-frequency resources can be pilot signals and data signals that have not undergone spread spectrum processing.

[0067] The solutions provided in the subsequent embodiments of this application provide a solution for configuring and implementing the transmission of DMRS in control channels (including the above-mentioned PUCCH and PSFCH).

[0068] Please refer to FIG3 , which shows a flow chart of a control channel transmission method provided by an embodiment of the present application. The method may be performed by a first device, wherein the first device may be the terminal device 120 or the terminal device 130 in the network architecture shown in FIG1 . The method may include the following steps:

[0069] Step 310: Receive indication information, where the indication information is used to indicate a first demodulation reference signal DMRS pattern or a first control channel type, where the first control channel type corresponds to a first DMRS pattern; the first DMRS pattern is one of multiple DMRS patterns.

[0070] The above indication information may be sent by the second device to the first device.

[0071] In some embodiments, the first device may be a terminal device, and the second device may be a network device that communicates with the terminal device, such as an access network device such as a base station.

[0072] In some embodiments, the first device may be a terminal device, and the second device may be another terminal device that performs sidelink communication with the terminal device.

[0073] In an embodiment of the present application, multiple DMRS modes can be set in advance for the control channel, or multiple control channel types can be set in advance for the control channel, each control channel type corresponds to a DMRS mode, and the second device can indicate the first DMRS mode to the first device through indication information, or indicate the first control channel type corresponding to the first DMRS mode, so that the first device can determine a DMRS mode for control channel transmission (i.e., the above-mentioned first DMRS mode) according to the indication information.

[0074] That is to say, in the solution shown in the embodiment of the present application, the second device can indicate one DMRS mode from multiple DMRS modes to the first device through indication information.

[0075] In some embodiments, the above-mentioned DMRS pattern can be used to limit one or more of the following information: the density of time-frequency resources in the time domain / frequency domain, the position of time-frequency resources in the time domain / frequency domain, the generation parameters of the DMRS sequence, the generation method of the DMRS sequence, and the power parameters.

[0076] Step 320: Transmit the control channel according to the DMRS pattern indicated by the indication information.

[0077] The first device may transmit the control channel to the second device according to the DMRS pattern (i.e., the first DMRS pattern) indicated by the indication information. That is, the first device carries the DMRS and data in the control channel according to the first DMRS pattern and transmits the control channel to the second device. In other words, the DMRS and data in the control channel are carried according to the DMRS pattern.

[0078] To sum up, in the scheme shown in the embodiment of the present application, the first device can receive indication information for indicating the first DMRS mode among multiple DMRS modes, or indicating the first control channel type corresponding to the first DMRS mode. When the control channel is subsequently transmitted, the control channel is transmitted according to the DMRS mode indicated by the indication information, thereby ensuring the flexibility of DMRS transmission in the control channel.

[0079] Please refer to Figure 4, which shows a flowchart of a control channel transmission method provided by an embodiment of the present application. The method can be performed by a second device, wherein the second device can be the terminal device 120 or the terminal device 130 in the network architecture shown in Figure 1, or the second device can be the network device 110 in the network architecture shown in Figure 1. The method can include the following steps:

[0080] Step 410: Send indication information to the first device, where the indication information is used to indicate a first demodulation reference signal DMRS mode or a first control channel type, where the first control channel type corresponds to a first DMRS mode; the first DMRS mode is one of multiple DMRS modes; the indication information is used to instruct the first device to transmit a control channel according to the DMRS mode indicated by the indication information.

[0081] To sum up, in the scheme shown in the embodiment of the present application, the second device can send an indication information to the first device for indicating the first DMRS mode among multiple DMRS modes, or indicating the first control channel type corresponding to the first DMRS mode, so that when the first device subsequently transmits the control channel, it transmits the control channel according to the DMRS mode indicated by the indication information, thereby ensuring the flexibility of DMRS transmission in the control channel.

[0082] Please refer to FIG5 , which shows a flow chart of a control channel transmission method provided by an embodiment of the present application. The method can be interactively performed by a first device and a second device; wherein the first device can be the terminal device 120 or the terminal device 130 in the network architecture shown in FIG1 , and the second device can be the network device 110 in the network architecture shown in FIG1 ; or, the first device and the second device can be the terminal device 120 and the terminal device 130 in the network architecture shown in FIG1 , respectively. The method can include the following steps:

[0083] Step 510: The second device sends indication information to the first device; the indication information is used to indicate a first demodulation reference signal DMRS mode or a first control channel type, the first control channel type corresponds to a first DMRS mode; the first DMRS mode is one of multiple DMRS modes.

[0084] In an embodiment of the present application, the above-mentioned multiple DMRS modes may refer to different DMRS patterns on the same control channel (such as PUCCH and PSFCH, etc.) resources (including resources used for uplink control information and DMRS transmission); or, the above-mentioned multiple DMRS modes may refer to multiple DMRS modes that can be used / allowed to be used for a control channel resource (such as a PUCCH resource).

[0085] In some embodiments, the above indication information is carried by one or more of the following message / signaling combinations:

[0086] Broadcast messages; system messages; Radio Resource Control (RRC) signaling; Media Access Control (MAC) Control Element (CE); Downlink Control Information (DCI) signaling; downlink messages during random access; and dedicated signaling for artificial intelligence (AI) / machine learning (ML).

[0087] That is to say, the second device can carry the above-mentioned indication information through one or more of broadcast messages (such as master information block (MIB)), system messages (such as system information block (SIB)), RRC signaling, MAC CE, DCI signaling, random access message, and AI / ML dedicated signaling.

[0088] In some embodiments, the indication information is used to indicate a first DMRS pattern or a first control channel type corresponding to the control channel with respect to a control channel format and / or a control channel resource;

[0089] The transmission of the control channel according to the DMRS mode indicated by the indication information includes:

[0090] According to the DMRS mode indicated by the indication information, the control channel is transmitted according to the above control channel format and / or control channel resources.

[0091] In an embodiment of the present application, the control channel transmitted by the first device may have multiple control channel types. The DMRS pattern corresponding to each control channel type may be indicated by a piece of indication information. That is, different indication information may indicate DMRS patterns of different control channel types. In addition, the indication information may further indicate a corresponding DMRS pattern or control channel type for a certain control channel format.

[0092] Optionally, there may be a plurality of the above indication information, wherein each of the above indication information indicates a different DMRS pattern or control channel type for an object (for example, a control channel format PUCCH format, and another example, a resource PUCCH resource).

[0093] Correspondingly, the first device transmits the control channel according to the DMRS pattern indicated by the indication information, which may mean that the first device transmits the control channel corresponding to the first control channel format according to the DMRS pattern indicated by the indication information.

[0094] In some embodiments, the multiple DMRS patterns are orthogonal DMRS patterns;

[0095] Alternatively, one or more DMRS patterns among the multiple DMRS patterns are non-orthogonal DMRS patterns.

[0096] The above-mentioned orthogonal DMRS pattern means that in the corresponding DMRS pattern, DMRS and data occupy different REs, or in other words, the REs occupied by DMRS and data do not overlap. In the embodiment of the present application, the above-mentioned multiple DMRS patterns are all orthogonal DMRS patterns, which means that in any DMRS pattern among the above-mentioned multiple DMRS patterns, the REs occupied by DMRS and data do not overlap.

[0097] Accordingly, the above-mentioned non-orthogonal DMRS pattern means that in the corresponding DMRS pattern, the REs occupied by the DMRS and the REs occupied by the data are all or partially the same, or in other words, the REs occupied by the DMRS and the data are allowed to overlap. In the embodiment of the present application, one or more of the above-mentioned multiple DMRS patterns are non-orthogonal DMRS patterns, which means that among the above-mentioned multiple DMRS patterns, there are some or all DMRS patterns that allow the REs occupied by the DMRS and the data to overlap.

[0098] In some embodiments, the multiple DMRS patterns each have one or more of the following parameters:

[0099] Frequency domain density of time-frequency resources used by DMRS; time domain density of time-frequency resources used by DMRS; frequency domain resource location of time-frequency resources used by DMRS; time domain resource location of time-frequency resources used by DMRS; DMRS sequence generation parameters; DMRS sequence generation method; power parameters.

[0100] That is to say, each of the above-mentioned DMRS modes can be used to indicate one or more of the frequency domain density of the time-frequency resources used by the DMRS in the control channel, the time domain density of the time-frequency resources used, the frequency domain resource position of the time-frequency resources used, the time domain resource position of the time-frequency resources used, the generation parameters, the generation method, the power parameters, and the like.

[0101] In some embodiments, among multiple DMRS patterns, the values ​​of all or some parameters of any two DMRS patterns are different; that is, the values ​​of one or more of the following parameters of the multiple DMRS patterns are different:

[0102] The density of time-frequency resources used by DMRS in the time domain; the density of time-frequency resources used by DMRS in the frequency domain; the position of time-frequency resources used by DMRS in the frequency domain; the position of time-frequency resources used by DMRS in the time domain; DMRS sequence generation parameters; DMRS sequence generation method; power parameters.

[0103] In some embodiments, the density of the time-frequency resources used by the DMRS in the time domain may refer to the density / number of symbols occupied by the time-frequency resources used by the DMRS. For example, the number of occupied symbols may be the number of occupied symbols in a sub-frame or a slot.

[0104] In some embodiments, the density of the time-frequency resources used by the DMRS in the frequency domain may refer to the density / number of subcarriers occupied by the time-frequency resources used by the DMRS. For example, the number of occupied subcarriers may be the number of occupied subcarriers within an RB.

[0105] In some embodiments, the position of the time-frequency resource used by the DMRS in the frequency domain may refer to the subcarrier where the time-frequency resource used by the DMRS is located.

[0106] In some embodiments, the position of the time-frequency resource used by the DMRS in the time domain may refer to the symbol where the time-frequency resource used by the DMRS is located.

[0107] In some embodiments, when one or more DMRS patterns among multiple DMRS patterns are non-orthogonal DMRS patterns, and the non-orthogonal DMRS pattern has a power-related parameter, the power parameter of the non-orthogonal DMRS pattern is used to indicate one or more of the following parameters on the shared resource unit RE:

[0108] The ratio of the DMRS transmit power on shared REs to the total transmit power on shared REs;

[0109] The ratio of data transmit power on shared REs to the total transmit power on shared REs.

[0110] The ratio of the DMRS transmit power on shared REs to the data transmit power on shared REs;

[0111] The ratio of the data transmission power on the shared RE to the DMRS transmission power on the shared RE;

[0112] The ratio of the DMRS transmit power on one RE to the total transmit power on the RE.

[0113] Among them, the power parameter of the above-mentioned DMRS mode may refer to the relevant parameters of the power of the DMRS sent in the control channel under the DMRS mode. For example, the power parameter may be the transmit power of the DMRS, or the ratio between the transmit power of the DMRS and the total transmit power / the transmit power of other data.

[0114] Among them, for the non-orthogonal DMRS mode, since it allows DMRS and data to be carried through the same RE (also called shared RE), the power parameters of the non-orthogonal DMRS mode may include the ratio of the transmit power of DMRS / data on the shared RE to the total transmit power of the shared RE; the power parameters of the non-orthogonal DMRS mode may also include the ratio / inverse of the ratio between the transmit power of DMRS and data on the shared RE; the power parameters of the non-orthogonal DMRS mode may also include the ratio of the transmit power of DMRS on any one RE to the total transmit power of the RE.

[0115] In some embodiments, the above indication information is further used to indicate the frequency domain resource density and / or frequency domain resource position of the DMRS in the first DMRS mode;

[0116] Alternatively, the frequency domain resource density and / or frequency domain resource position of the DMRS in the first DMRS mode are predefined.

[0117] Among them, the frequency domain resource density and / or frequency domain resource position of DMRS in the above-mentioned multiple DMRS modes can be indicated by indication information, that is, the frequency domain resource density and / or frequency domain resource position of DMRS in each DMRS mode among the multiple DMRS modes can be flexibly indicated by the second device to ensure the flexibility of the frequency domain resource density and / or frequency domain resource position of DMRS.

[0118] Alternatively, the frequency domain resource density and / or frequency domain resource position of the DMRS in the above-mentioned multiple DMRS modes may also be pre-specified by the protocol or pre-set at the factory, that is, the frequency domain resource density and / or frequency domain resource position of the DMRS in each of the multiple DMRS modes does not require indication by the second device, thereby saving signaling resources.

[0119] Alternatively, the frequency domain resource density and / or frequency domain resource position of DMRS in some of the above-mentioned multiple DMRS modes can be indicated by indication information, and the frequency domain resource density and / or frequency domain resource position of DMRS in other DMRS modes can be pre-specified by the protocol or pre-set at the factory.

[0120] For example, among the above-mentioned multiple DMRS modes, the frequency domain resource density and / or frequency domain resource position of the DMRS in the specified DMRS mode can be indicated by the indication information, and the frequency domain resource density and / or frequency domain resource position of the DMRS in other DMRS modes can be pre-specified by the protocol or pre-set at the factory; for example, the above-mentioned multiple DMRS modes include 4 DMRS modes, which are marked as 0 to 3 for the convenience of description, among which the frequency domain resource density and / or frequency domain resource position of the DMRS in the DMRS modes numbered 0 and 1 can be indicated by the indication information, and the frequency domain resource density and / or frequency domain resource position of the DMRS in the DMRS modes numbered 2 and 3 can be pre-specified by the protocol or pre-set at the factory. That is to say, when the first DMRS mode indicated by the above indication information is the DMRS mode numbered 0 or 1, the indication information also indicates the frequency domain resource density and / or frequency domain resource position of the DMRS in the first DMRS mode; conversely, when the first DMRS mode indicated by the above indication information is the DMRS mode numbered 2 or 3, the indication information may not indicate the frequency domain resource density and / or frequency domain resource position of the DMRS in the first DMRS mode, and the first device may determine the frequency domain resource density and / or frequency domain resource position of the DMRS in the first DMRS mode through protocol provisions or factory settings.

[0121] For another example, among the above-mentioned multiple DMRS modes, the frequency domain resource density and / or frequency domain resource position of the DMRS in the orthogonal DMRS mode can be indicated by the indication information, and the frequency domain resource density and / or frequency domain resource position of the DMRS in the non-orthogonal DMRS mode can be pre-specified by the protocol or pre-set at the factory; for example, when the first DMRS mode indicated by the above-mentioned indication information is the orthogonal DMRS mode, the indication information also indicates the frequency domain resource density and / or frequency domain resource position of the DMRS in the first DMRS mode; conversely, when the first DMRS mode indicated by the above-mentioned indication information is the non-orthogonal DMRS mode, the indication information may not indicate the frequency domain resource density and / or frequency domain resource position of the DMRS in the first DMRS mode, and the first device may determine the frequency domain resource density and / or frequency domain resource position of the DMRS in the first DMRS mode through protocol provisions or factory settings.

[0122] For another example, among the above-mentioned multiple DMRS modes, the frequency domain resource density and / or frequency domain resource position of the DMRS in the non-orthogonal DMRS mode can be indicated by the indication information, and the frequency domain resource density and / or frequency domain resource position of the DMRS in the orthogonal DMRS mode can be pre-specified by the protocol or pre-set at the factory; for example, when the first DMRS mode indicated by the above-mentioned indication information is the non-orthogonal DMRS mode, the indication information also indicates the frequency domain resource density and / or frequency domain resource position of the DMRS in the first DMRS mode; conversely, when the first DMRS mode indicated by the above-mentioned indication information is the orthogonal DMRS mode, the indication information may not indicate the frequency domain resource density and / or frequency domain resource position of the DMRS in the first DMRS mode, and the first device may determine the frequency domain resource density and / or frequency domain resource position of the DMRS in the first DMRS mode through protocol provisions or factory settings.

[0123] In some embodiments, the indication information is further used to indicate the time domain density and / or time domain resource position of the DMRS in the first DMRS mode;

[0124] Alternatively, the time domain density and / or time domain resource position of the DMRS in the first DMRS pattern is predefined.

[0125] Among them, the time domain resource density and / or time domain resource position of DMRS in the above-mentioned multiple DMRS modes can be indicated by the indication information, that is, the time domain resource density and / or time domain resource position of DMRS in each DMRS mode in the multiple DMRS modes can be flexibly indicated by the second device to ensure the flexibility of the time domain resource density and / or time domain resource position of DMRS.

[0126] Alternatively, the time domain resource density and / or time domain resource position of the DMRS in the above-mentioned multiple DMRS modes may also be pre-specified by the protocol or pre-set at the factory, that is, the time domain resource density and / or time domain resource position of the DMRS in each of the multiple DMRS modes does not require indication by the second device, thereby saving signaling resources.

[0127] Alternatively, the time domain resource density and / or time domain resource position of DMRS in some of the above-mentioned multiple DMRS modes can be indicated by indication information, and the time domain resource density and / or time domain resource position of DMRS in other DMRS modes can be pre-specified by the protocol or pre-set at the factory.

[0128] For example, among the above-mentioned multiple DMRS modes, the time domain resource density and / or time domain resource position of the DMRS in the specified DMRS mode can be indicated by the indication information, and the time domain resource density and / or time domain resource position of the DMRS in other DMRS modes can be pre-specified by the protocol or pre-set at the factory; for example, the above-mentioned multiple DMRS modes include 4 DMRS modes, which are marked as 0 to 3 for the convenience of description, among which the time domain resource density and / or time domain resource position of the DMRS in the DMRS modes numbered 0 and 1 can be indicated by the indication information, and the time domain resource density and / or time domain resource position of the DMRS in the DMRS modes numbered 2 and 3 can be pre-specified by the protocol or pre-set at the factory. That is to say, when the first DMRS mode indicated by the above indication information is the DMRS mode numbered 0 or 1, the indication information also indicates the time domain resource density and / or time domain resource position of the DMRS in the first DMRS mode; conversely, when the first DMRS mode indicated by the above indication information is the DMRS mode numbered 2 or 3, the indication information may not indicate the time domain resource density and / or time domain resource position of the DMRS in the first DMRS mode, and the first device may determine the time domain resource density and / or time domain resource position of the DMRS in the first DMRS mode through protocol provisions or factory settings.

[0129] For another example, among the above-mentioned multiple DMRS modes, the time domain resource density and / or time domain resource position of the DMRS in the orthogonal DMRS mode can be indicated by the indication information, and the time domain resource density and / or time domain resource position of the DMRS in the non-orthogonal DMRS mode can be pre-specified by the protocol or pre-set at the factory; for example, when the first DMRS mode indicated by the above-mentioned indication information is the orthogonal DMRS mode, the indication information also indicates the time domain resource density and / or time domain resource position of the DMRS in the first DMRS mode; conversely, when the first DMRS mode indicated by the above-mentioned indication information is the non-orthogonal DMRS mode, the indication information may not indicate the time domain resource density and / or time domain resource position of the DMRS in the first DMRS mode, and the first device may determine the time domain resource density and / or time domain resource position of the DMRS in the first DMRS mode through protocol provisions or factory settings.

[0130] For another example, among the above-mentioned multiple DMRS modes, the time domain resource density and / or time domain resource position of the DMRS in the non-orthogonal DMRS mode can be indicated by the indication information, and the time domain resource density and / or time domain resource position of the DMRS in the orthogonal DMRS mode can be pre-specified by the protocol or pre-set at the factory; for example, when the first DMRS mode indicated by the above-mentioned indication information is the non-orthogonal DMRS mode, the indication information also indicates the time domain resource density and / or time domain resource position of the DMRS in the first DMRS mode; conversely, when the first DMRS mode indicated by the above-mentioned indication information is the orthogonal DMRS mode, the indication information may not indicate the time domain resource density and / or time domain resource position of the DMRS in the first DMRS mode, and the first device may determine the time domain resource density and / or time domain resource position of the DMRS in the first DMRS mode according to the protocol provisions or factory settings.

[0131] In some embodiments, the indication information is further used to indicate sequence generation parameters of the first DMRS pattern.

[0132] In an embodiment of the present application, the sequence generation parameters of DMRS in multiple DMRS modes can be indicated by the second device to the first device, that is, the second device can dynamically adjust the sequence generation parameters of DMRS, thereby improving the flexibility of DMRS sequence generation parameter setting.

[0133] In some embodiments, the sequence generation parameters include one or more of the following:

[0134] The slot number of the DMRS; the symbol number of the DMRS, or the number of the symbol of the DMRS within a slot; the system frame number (SFN) number of the DMRS; the cell number of the DMRS, or the physical layer cell number of the DMRS; the carrier number of the DMRS; the port number of the DMRS; the number corresponding to the data scheduling control channel; wherein the feedback information of the data scheduled by the data scheduling control channel is carried by the above-mentioned control channel; for example, the DCI in the PDCCH schedules a PDSCH, and the ACK / NACK corresponding to the PDSCH is fed back through the PUCCH (that is, the above-mentioned control channel). In this scenario, the data scheduling control channel refers to the PDCCH, the data scheduled by the data scheduling control channel is the PDSCH, and the feedback information of the data scheduled by the data scheduling control channel is the ACK / NACK; the DMRS scrambling parameters; and other relevant parameters of the network configuration.

[0135] The sequence generation parameters indicated by the above indication information may include the slot, symbol, SFN, cell, carrier, port, control channel number of the DMRS, and one or more of network configuration parameters, thereby providing a flexible configuration method for the sequence generation parameters. In some embodiments, the indication information may indicate one or more of the above parameters.

[0136] In some embodiments, the indication information is configured for a corresponding cell; or,

[0137] The indication information is configured for the corresponding carrier; or,

[0138] The instruction information configures the bandwidth part BWP; or,

[0139] The indication information is configured for the physical sidelink feedback channel PSFCH; or,

[0140] The indication information configures the physical uplink control channel PUCCH resources; or,

[0141] The indication information is configured for the corresponding PUCCH resource group; or,

[0142] The indication information is configured corresponding to the PUCCH format.

[0143] Furthermore, the indication information may be information in the configuration information of a cell; or,

[0144] The indication information may be information in the configuration information of a carrier; or,

[0145] The indication information may be information in the configuration information of a BWP; or,

[0146] The indication information may be information in the configuration information of a PSFCH; or,

[0147] The indication information may be information in the configuration information of a PUCCH resource; or,

[0148] The indication information may be information in the configuration information of a PUCCH resource group; or,

[0149] The indication information may be information in configuration information of a PUCCH format.

[0150] In an embodiment of the present application, the DMRS modes corresponding to different carriers, BWPs, PSFCHs, PUCCHs, PUCCH resource groups, or PUCCH formats can be configured by different indication information, thereby providing a variety of indication granularities of the DMRS mode and ensuring the flexibility of the DMRS mode indication.

[0151] In some embodiments, the DMRS pattern indicated by the indication information is not used for PUCCH format 0;

[0152] Alternatively, the DMRS pattern indicated by the indication information is not used for PUCCH transmission that only feeds back ACK / NACK.

[0153] In some embodiments, for a repeatedly transmitted control channel, one or more of the following parameters of the corresponding DMRS are the same:

[0154] Whether DMRS uses at least one of the same REs as control information; whether all REs corresponding to DMRS are used for control information at the same time; the frequency domain density of the time-frequency resources used by DMRS; the time domain density of the time-frequency resources used by DMRS; and power parameters.

[0155] In an embodiment of the present application, for the repeatedly transmitted control channel, there may be differences in whether the DMRS and the control information use at least one identical RE, whether all REs corresponding to the DMRS are used for the control information at the same time, the frequency domain density of the time-frequency resources used by the DMRS, the time domain density of the time-frequency resources used by the DMRS, and the power parameters, thereby ensuring the flexibility of the DMRS configuration during the repeated transmission of the control channel.

[0156] In some embodiments, the configuration information of multiple DMRS modes is the same as one or more of the following parameters of the DMRS configuration information of the data channel: power parameter; DMRS sequence generation method; frequency domain density of the time-frequency resources used by DMRS; time domain density of the time-frequency resources used by DMRS.

[0157] In an embodiment of the present application, the configuration information of the DMRS of the control channel can share one or more of the power parameters, DMRS sequence generation method, frequency domain density of the time-frequency resources used by DMRS, and time domain density of the time-frequency resources used by DMRS with the DMRS configuration information of the data channel. Part of the configuration of the DMRS in the control channel and the data channel can be unified, which can save system resources and improve the efficiency of DMRS configuration and transmission.

[0158] Step 520: The first device transmits a control channel with the second device according to the DMRS pattern indicated by the indication information.

[0159] For example, the first device sends a control channel to the second device according to the first DMRS pattern indicated by the indication information.

[0160] Among them, when the above-mentioned first device is a terminal device and the second device is a network device, the terminal device can send PUCCH to the network device according to the first DMRS mode indicated by the indication information, that is, the DMRS and data in the PUCCH are generated and sent according to the first DMRS mode.

[0161] Alternatively, when the first device and the second device are two terminal devices communicating sideways, the first device can send PSFCH to the second device according to the first DMRS mode indicated by the indication information, that is, the DMRS and data in the PSFCH are generated and sent according to the first DMRS mode.

[0162] Based on the embodiment shown in FIG5 , please refer to FIG6 , which shows a flow chart of a control channel transmission method provided by an embodiment of the present application. Before step 510 in the embodiment shown in FIG5 , step 502 may also be included:

[0163] Step 502: The first device reports capability information to the second device; correspondingly, the second device receives the capability information reported by the first device.

[0164] Optionally, in the above step 510, the second device may send the above indication information to the second device according to the capability information reported by the first device.

[0165] The capability information is used to indicate one or more of the following: the first device supports receiving indication information; the first device supports multiple DMRS modes; the first device supports multiple control channel types; the first device supports non-orthogonal DMRS mode; and the first device supports the first DMRS mode or the first control channel type.

[0166] In an embodiment of the present application, the first device may report its own capabilities to the second device in advance, such as whether to indicate the above-mentioned indication information, whether to support multiple DMRS modes, or whether to support multiple control channel types, or whether to support non-orthogonal DMRS modes, or whether to support the first DMRS mode, or whether to support the first control channel type, etc., so that the second device can determine whether to instruct the first device to transmit the control channel through the first DMRS mode through the indication information, and ensure the accuracy and compatibility of the DMRS mode in the control channel indicated by the indication information.

[0167] In some embodiments, the capability information is reported via one or more of the following messages: RRC signaling, and MAC CE.

[0168] The first device may report the capability information via RRC signaling or MAC CE.

[0169] Alternatively, the first device may also report the capability information through RRC signaling and MAC CE; for example, the first device reports a part of the capability information through RRC signaling and reports another part of the capability information through MAC CE.

[0170] In some embodiments, capability information is reported for a frequency band;

[0171] Capability information is reported independently according to the frequency band combination;

[0172] Capability information is reported independently for each frequency band in the frequency band combination;

[0173] Capability information is reported independently for each carrier on each frequency band in the frequency band combination;

[0174] Capability information is reported according to frequency band range;

[0175] Alternatively, the capability information is reported for the UE.

[0176] In an embodiment of the present application, the capability information of the first device may be different for different frequency bands (Per Band). In this case, the first device may report capability information for one or more frequency bands, for example, reporting different capability information for different frequency bands. For example, the first device may report capability information for all frequency bands it supports; or the first device may report capability information for some of the frequency bands it supports, and may not report capability information for the remaining frequency bands.

[0177] Alternatively, the capability information of the first device may be different for different frequency band combinations (Per Band Combination). In this case, the first device may report capability information for each frequency band combination, for example, reporting different capability information for different frequency band combinations. For example, the first device may report capability information for all frequency band combinations it supports; or the first device may report capability information for some of the frequency band combinations it supports, and may not report capability information for the remaining frequency band combinations.

[0178] Alternatively, the capability information of the first device may be different for each frequency band in the frequency band combination (Per Band Per Band Combination). In this case, the first device may report capability information separately for one or more frequency bands in the frequency band combination. For example, different capability information may be reported for different frequency bands in a frequency band combination. For example, the first device may report capability information separately for all frequency bands in a certain frequency band combination; or the first device may report capability information separately for some frequency bands among all frequency bands in a certain frequency band combination, and may not report capability information for the remaining frequency bands in the frequency band combination.

[0179] Alternatively, the capability information of the first device may be different for each carrier on each frequency band in the frequency band combination (Per CC Per Band Per Band Combination). In this case, the first device may report capability information separately for each carrier in one or more frequency bands in the frequency band combination. For example, different capability information may be reported for different carriers in a frequency band of a frequency band combination. For example, the first device may report capability information separately for each carrier in all frequency bands in a certain frequency band combination; or the first device may report capability information separately for some carriers in some frequency bands of a certain frequency band combination, and may not report capability information for the remaining carriers in the frequency band combination.

[0180] Alternatively, the capability information of the first device may be different for different frequency bands (Per FR). In this case, the first device may report capability information for one or more frequency bands, for example, different capability information for different frequency bands. For example, the first device may report capability information for all frequency bands it supports; or the first device may report capability information for some of the frequency bands it supports, and may not report capability information for the remaining frequency bands.

[0181] Alternatively, different UEs have different capability information (Per UE), that is, each UE has its own piece of capability information. In this case, the first device may report its own piece of capability information to the second device.

[0182] In some embodiments, the capability information may further include one or more of the following: supported power parameters; supported frequency domain density of time-frequency resources used by DMRS; supported time domain density of time-frequency resources used by DMRS.

[0183] In an embodiment of the present application, in addition to the above-mentioned information on whether reception indication information is supported, multiple DMRS modes supported, multiple control channel types supported, and whether the first DMRS mode or the first control channel type is supported, the first device can also report information such as supported power parameters, frequency domain density of time-frequency resources used by supported DMRS, and time domain density of time-frequency resources used by supported DMRS as capability information to the second device.

[0184] Based on the embodiments shown in Figures 5 and 6 above, a scheme for indicating one of multiple DMRS patterns for a single PUCCH type / format for control channel transmission is provided, as well as a scheme for setting a DMRS pattern for each of multiple PUCCH types / formats for control channel transmission. The following describes both schemes using the example of indicating one of two DMRS patterns.

[0185] Example 1

[0186] Taking the unchanged PUCCH format and indicating one of the different DMRS patterns as an example, it is assumed that there are multiple (M) different DMRS patterns for the uplink control channel in the system. For the sake of simplicity, this embodiment takes M=2 DMRS patterns as an example, which are respectively recorded as the first DMRS pattern and the second DMRS pattern. It can be directly extended to more different DMRSs and will not be described one by one. The first DMRS pattern and the second DMRS pattern are different, for example, the time domain / frequency domain density is different, and / or the time domain position is different, and / or the frequency domain position is different, and / or the sequence generation parameters are different, and / or the generation mode / method is different, and / or the power parameters are different, etc.

[0187] The different DMRS patterns here refer to different DMRS patterns on the same PUCCH resources (including resources used for uplink control information and DMRS transmission). For example, if PUCCH uses N = 6 symbols, there can be M different DMRS patterns. In a single transmission, one or more of these patterns can be used, for example, the first DMRS pattern or the second DMRS pattern, or both the first DMRS pattern and the second DMRS pattern.

[0188] The first terminal device receives a first indication message sent by the first network device or the second terminal device (corresponding to the sidelink scenario), where the first indication message indicates the first demodulation reference signal (DMRS) of the control channel (represented as the first DMRS pattern). This solution can flexibly indicate or configure the DMRS of the control channel to better match the wireless environment and improve system performance.

[0189] If the first indication information is sent by the first network device, then the control channel corresponds to the first DMRS pattern of the uplink control channel (eg, PUCCH).

[0190] If the first indication information is sent by the second terminal device, then the control channel corresponds to the first DMRS pattern of the sidelink feedback channel (eg, PSFCH).

[0191] In the subsequent description, in order to simplify the description: for control channels, unless otherwise specified, generally refer to the uplink control channel (PUCCH) and / or the sidelink feedback channel (PSFCH); for data signals / control information, unless otherwise specified, generally refer to the information transmitted by the uplink control channel (PUCCH) and / or the sidelink feedback channel (PSFCH).

[0192] Optionally, the first indication information may be implemented through one or more of the following message / signaling combinations:

[0193] Broadcast message MIB can notify all UEs and reduce the total signaling overhead;

[0194] System messages such as SIB1 can notify all UEs and reduce the total signaling overhead;

[0195] RRC signaling can be configured individually for each UE, which is more targeted and improves the performance of each UE. It is more reliable than MAC CE and DCI.

[0196] MAC CE signaling can achieve individual configuration for each UE, which can be more targeted and improve the performance of each UE. It has lower latency than RRC and higher reliability than DCI.

[0197] DCI signaling can achieve individual configuration for each UE, which can be more targeted and improve the performance of each UE. The latency is lower than RRC and MAC CE.

[0198] Downlink messages during random access, such as MsgB, Msg2, Msg3, and Msg4, can be configured in advance (compared to RRC) to improve performance.

[0199] AI / ML dedicated signaling, which is more efficient when transmitted through dedicated signaling.

[0200] For example, the first indication information is indicated by RRC signaling and MAC CE signaling. For another example, the first indication information is indicated by system message and RRC signaling. Other combinations are not given one by one, and can be directly generalized.

[0201] The same signaling / message may also be used as an indication from multiple signalings / messages of the same type. For example, the first indication message may correspond to multiple RRC signalings, that is, different information in the first indication message is indicated by different RRC signalings.

[0202] Different first indication messages may indicate different DMRS patterns. For example, in one indication, the first indication message indicates a first DMRS pattern, while in another indication, the first indication message may indicate a second DMRS pattern.

[0203] Optionally, there may be multiple first indication information, for example, K>=2 first indication information respectively indicating DMRS patterns corresponding to K PUCCH formats.

[0204] Optionally, the first indication information includes at least one first field, which may be implemented in different ways:

[0205] Option 1: Uses different values ​​to indicate whether the first or second DMRS mode is used. For example, when the first field takes the first value, it indicates the first DMRS mode; when the first field takes the second value, it indicates the second DMRS mode. This option offers greater flexibility than Option 2 / 3 because it can indicate more DMRS modes, not just two.

[0206] Option 2: When the first domain is configured, the first DMRS mode is indicated; when the first domain is not configured, the control channel uses the second DMRS mode (i.e., implicitly indicates the second DMRS mode). In this case, the second DMRS mode is the default DMRS mode. The second DMRS mode can be determined based on pre-defined rules (e.g., protocol specifications) and / or network broadcast information / system information, saving signaling overhead compared to Option 1. Optionally, when the first domain is configured, its value can be "enabled" or "support," or variations thereof (e.g., enable, supported, and other related forms).

[0207] Option 3: When the first domain is configured, the second DMRS mode is indicated; when the first domain is not configured, the control channel uses the first DMRS mode (ie, implicitly indicates the first DMRS mode). Compared with Option 1, this saves signaling overhead.

[0208] For example, when the first indication information is indicated by DCI, 2 different DMRS modes can be indicated by 1 bit (when more DMRS modes are to be indicated, more bits are required). Optionally, the above DCI also indicates the corresponding PUCCH resource through the "PUCCH resource indicator" field, and the PUCCH DMRS mode indicated by the above DCI is used for the above PUCCH resource. A specific implementation is to pre-set N (N<=M) DMRS modes, or configure N (N<=M) DMRS modes through RRC and / or MAC CE (the above DMRS modes are used for PUCCH), and then DCI indicates the PUCCH resource and its corresponding DMRS mode (1 of the above N DMRS) through the corresponding two fields. Optionally, the above two fields can also be jointly encoded into one field, and the value of this field indicates the PUCCH resource and one of the N DMRSs at the same time. Among them, the entire system can support M DMRS modes, but for a certain UE, only N of the DMRS modes may be configured for use.

[0209] Optionally, the first indication information indicates whether it is the first DMRS mode or the second DMRS mode by configuring different fields through a CHOICE structure.

[0210] Example 1-1-A

[0211] This embodiment is directed to an orthogonal first DMRS pattern.

[0212] Optionally, the REs of the first DMRS pattern do not overlap with the REs used for control information, that is, the first DMRS uses different REs from the control information; the REs of the second DMRS pattern do not overlap with the REs used for control information, that is, the second DMRS pattern uses different REs from the control information. In other words, the first DMRS / second DMRS pattern and the control information are orthogonal in time-frequency resources (referred to as orthogonal DMRS for short). The above-mentioned first DMRS pattern and the above-mentioned second DMRS pattern are for the same scheduled PUCCH resource (for example, the number of symbols used for PUCCH transmission is the same), and an orthogonal DMRS pattern can be used to avoid introducing a new DMRS pattern and reduce system complexity.

[0213] The time-frequency resources used by the first DMRS pattern and the second DMRS pattern are different, that is, the time-frequency resources used by the first DMRS pattern and the second DMRS pattern are at least partially different. For example, the time-frequency resources used by the first DMRS pattern and the second DMRS pattern may be different in one or more of the following:

[0214] The first DMRS pattern and the second DMRS pattern have different densities in the time domain;

[0215] The first DMRS pattern and the second DMRS pattern have different densities in the frequency domain;

[0216] The first DMRS pattern and the second DMRS pattern have different positions in the frequency domain;

[0217] The first DMRS pattern and the second DMRS pattern have different positions in the time domain;

[0218] The first DMRS pattern and the second DMRS pattern have different sequence generation parameters;

[0219] The first DMRS pattern and the second DMRS pattern are generated by different methods;

[0220] The first DMRS pattern and the second DMRS pattern have different generation parameters;

[0221] The first DMRS pattern and the second DMRS pattern have different power parameters.

[0222] Optionally, configurations / parameters related to the first DMRS pattern and the second DMRS pattern are pre-specified, and the first indication information indicates whether to use the first DMRS pattern or the second DMRS pattern. For example, the first indication information may include one or more second fields, with different values ​​indicating different DMRS patterns. Advantage: Pre-specified configurations reduce signaling overhead.

[0223] Optionally, configurations / parameters related to the first DMRS mode are predefined, i.e., the first DMRS mode is the default DMRS mode; the first indication information indicates one or more parameters of the second DMRS mode. For example, the first indication information may contain one or more third fields, which indicate the parameters of the second DMRS mode. If the third field is not configured, the first DMRS mode (i.e., the default DMRS mode) is used. Using the default DMRS mode reduces signaling overhead while also providing sufficient flexibility for configuring the second DMRS mode.

[0224] The preceding description is a more detailed explanation of the first domain, while the second and third domains are an implementation of the first domain. The description of the xth domain (x is five, six, etc.) is similar.

[0225] The first DMRS pattern and the second DMRS pattern may have one or more of the following parameters:

[0226] Frequency domain density; time domain density; frequency domain resource location; time domain resource location; DMRS sequence generation parameters; power-related parameters.

[0227] If the first DMRS pattern and the second DMRS pattern use different numbers of symbols in the time domain (i.e., different time domain densities), if DCI is used to transmit the first indication information, then when the speed of the first terminal device increases, the network can quickly instruct to use more symbols for DMRS transmission, thereby better coping with the time-varying characteristics of the channel; when the speed of the first terminal device decreases, the network can quickly instruct to use fewer symbols for DMRS transmission, thereby using more symbols for the transmission of control information.

[0228] Example 1-1-B

[0229] This part is for the non-orthogonal first DMRS. One or more or all REs occupied by the first DMRS are also used for control information transmission (abbreviated as non-orthogonal DMRS).

[0230] Optionally, the REs of the second DMRS pattern do not overlap with the REs used for control information, that is, the second DMRS pattern uses different REs than the control information. In other words, the second DMRS pattern and the control information are orthogonal in time-frequency resources. One or more or all REs of the first DMRS pattern are also REs used for control information (to simplify the description, we refer to these REs as shared REs). This solution allows DMRS and control information to use the same REs, allowing control information to use more REs and improving transmission reliability.

[0231] Optionally, configurations / parameters related to the first DMRS mode and the second DMRS mode are predefined, and the first indication information indicates whether to use the first DMRS mode or the second DMRS mode. For example, the first indication information contains a fifth field, and different values ​​are used to indicate different DMRS modes. Different DMRS modes can also be indicated by whether the fifth field is configured. For example, one implementation is to indicate the second DMRS mode when the fifth field is not configured, and to indicate the first DMRS mode when the fifth field is configured; another implementation is the opposite, to indicate the first DMRS mode when the fifth field is not configured, and to indicate the second DMRS mode when the fifth field is configured. This solution can reduce signaling overhead in a predefined manner.

[0232] Optionally, configurations / parameters related to the first DMRS mode are pre-specified, i.e., the first DMRS mode is the default DMRS mode; the first indication information indicates one or more parameters of the second DMRS mode. For example, the first indication information may include one or more sixth fields, which indicate the parameters of the second DMRS mode. If the sixth field is not configured, the first DMRS mode (i.e., the default DMRS mode) is used. Using only the default DMRS mode can reduce signaling overhead while also providing sufficient flexibility to configure another DMRS mode.

[0233] Optionally, configurations / parameters related to the second DMRS mode are predefined, i.e., the second DMRS is the default DMRS; the first indication information indicates one or more parameters of the first DMRS mode. For example, the first indication information may include one or more seventh fields, which indicate the parameters of the first DMRS mode. If the seventh field is not configured, the second DMRS mode (i.e., the default DMRS mode) is used. While using only the default DMRS can reduce signaling overhead, it also provides sufficient flexibility to configure another DMRS.

[0234] Optionally, the first indication information indicates one or more parameters of the first DMRS mode, or one or more parameters of the second DMRS mode. For example, the first indication information contains one or more eighth fields, and the eighth field is used to indicate the parameters of the first DMRS mode or the second DMRS mode. For another example, the first indication information uses a CHOICE structure to configure different fields to indicate whether it is the first DMRS or the second DMRS mode (when the first DMRS mode and the second DMRS mode are mentioned in this embodiment, two different DMRS modes are used as examples, and it can also be directly extended to more different DMRS modes). These two different fields in the CHOICE structure are recorded as the ninth field and the tenth field. When the ninth field is configured, it is used to indicate the first DMRS mode, and when the tenth field is configured, it is used to indicate the second DMRS mode. This solution can flexibly configure each DMRS, providing optimization space for the system.

[0235] The second DMRS pattern may have one or more of the following parameters:

[0236] Frequency domain density; time domain density; frequency domain resource location; time domain resource location; DMRS sequence generation parameters; power-related parameters.

[0237] Optionally, the first indication information indicates the power parameters of the first DMRS pattern, or the power parameters of the first DMRS pattern are pre-specified (e.g., pre-specified by a protocol, or pre-specified by network broadcast information, etc.). In this embodiment, references to "power" can also be directly expanded to "energy." In this solution, if indicated by the first indication information, the power allocation of the power DMRS can be flexibly indicated, so that the system can optimize the DMRS transmission power according to the wireless environment and improve system performance; if it is pre-specified, signaling overhead can be saved.

[0238] Optionally, the power parameter is indicated on a shared RE:

[0239] The ratio of the power of DMRS transmitted on the shared RE to the total power on the shared RE (ie, the total power of DMRS and data); or

[0240] The ratio of the power of data transmitted on the shared RE to the total power on the shared RE (ie, the total power of DMRS and data); or

[0241] The ratio of the power of DMRS transmitted on the shared RE to the power of data on the shared RE; or

[0242] The ratio of the power of data transmitted on the shared RE to the DMRS power on the shared RE; or

[0243] The ratio of the DMRS transmission power to the total power on an RE (regardless of whether the RE is shared).

[0244] The above ratio can be a linear value or a dB value. For example, a linear value of 0.1 corresponds to a dB value of -10dB or 10dB.

[0245] Optionally, the first indication information indicates the frequency domain resource density and / or frequency domain resource position of the DMRS corresponding to the first DMRS pattern, or the frequency domain resource density and / or frequency domain resource position of the DMRS corresponding to the first DMRS pattern is pre-specified (e.g., pre-specified by a protocol, or pre-specified by network broadcast information, etc.). This solution can flexibly change the frequency domain resource position of the first DMRS, thereby better facilitating multi-user multiplexing and reducing DMRS interference between users.

[0246] For example, the first indication information may indicate the density of the DMRS corresponding to the first DMRS pattern in the frequency domain (for example, indicating how many REs are occupied in one RB), and / or the offset value of the DMRS corresponding to the first DMRS pattern in the frequency domain (for example, RE offset value). Alternatively, the first indication information may indicate which frequency domain resources are occupied by the DMRS corresponding to the first DMRS pattern by means of a bitmap or by directly indicating the frequency domain resource (for example, RE, RB) number. This solution has high flexibility.

[0247] For another example, as another implementation, the first indication information can directly indicate which frequency domain pattern the first DMRS mode adopts, where these alternative frequency domain patterns are determined by pre-defined rules and / or network configuration. One of the frequency domain patterns identifies which resources in the frequency domain can be used for DMRS, and this solution has lower signaling overhead.

[0248] For another example, as another implementation, a frequency domain pattern is predefined, and as long as the first indication information indicates the first DMRS mode, the predefined frequency domain pattern is adopted.

[0249] Optionally, the first indication information indicates the time domain density and / or time domain resource position of the DMRS corresponding to the first DMRS pattern. For example, the first indication information indicates the time domain density of the DMRS corresponding to the first DMRS pattern, that is, indicates that the DMRS is transmitted on one symbol in every Z symbols. For another example, the first indication information indicates which symbols (for example, which symbols within a slot) are used by the DMRS corresponding to the first DMRS pattern by means of a bitmap or directly indicating the symbol number. This solution can flexibly change the time domain density and / or time domain resource position of the DMRS, and can achieve a good compromise between performance and complexity.

[0250] For another example, as another implementation, the first indication information can directly indicate which time domain pattern the first DMRS mode adopts, where these alternative time domain patterns are determined by pre-defined rules and / or network configuration. One of the time domain patterns identifies which symbols carry DMRS. This solution has lower signaling overhead.

[0251] Optionally, the first indication information indicates a sequence generation parameter of the first DMRS pattern.

[0252] Optionally, the generation of the sequence of the first DMRS pattern is based on one or more of the following parameters:

[0253] The current slot number where the DMRS is located;

[0254] The current symbol number of the DMRS, or the current symbol number of the first DMRS within a slot;

[0255] The current SFN number where the DMRS is located;

[0256] The current cell ID where the DMRS is located, or the physical layer cell ID (PCI);

[0257] The current carrier number where the DMRS is located (here refers to the carrier in carrier aggregation, that is, component carrier, or simply carrier);

[0258] Different DMRS port numbers, for example, the sequence corresponding to the first DMRS port i is generated based on the port number i;

[0259] The number corresponding to the control channel that schedules the corresponding data (for example, the group number corresponding to the CORESET); or, the number corresponding to the data scheduling control channel; wherein the feedback information of the data scheduled by the data scheduling control channel is carried by the above control channel; for example, the DCI in the PDCCH schedules a PDSCH, and the ACK / NACK corresponding to the PDSCH is fed back through the PUCCH (that is, the above control channel). In this scenario, the above "corresponding data" is the PDSCH.

[0260] Other parameters related to network configuration.

[0261] One or more parameters in the above examples can be indicated by the first indication information, which has high flexibility.

[0262] If DCI is used to transmit the first indication information, when the network wants to improve performance, the network can quickly instruct the first terminal to use the first DMRS mode, so that the network can improve performance through an advanced receiver (such as an AI / ML receiver); when the network wants to save its own power consumption and hopes to use a simple receiver, the network can quickly instruct the first terminal to use the second DMRS mode (i.e., orthogonal DMRS mode).

[0263] The above embodiment 1-1-A and embodiment 1-1-B can be used in combination. For example, the first indication information can indicate one of N>=3 different DMRSs. Taking N=3 as an example, two DMRSs are orthogonal to the control information, and one DMRS is not orthogonal to the control information.

[0264] Optionally, the first indication information can be configured for different objects:

[0265] The first indication information is configured for a cell, that is, the first indication information is information in the configuration information of the control channel in a cell. Compared with other solutions, for example, for PUCCH resource and PUCCH format, this solution can reduce signaling overhead.

[0266] The first indication information is configured for a carrier, that is, the first indication information is information in the configuration information of the control channel in a carrier. Compared with other solutions, such as for PUCCH resource and PUCCH format, signaling overhead can be reduced.

[0267] The first indication information is for a BWP configuration (BWP here refers to the BWP concept in NR), that is, the first indication information is information in the configuration information of the control channel in a BWP. Compared with other schemes, such as CORESET and search space, it can reduce signaling overhead.

[0268] The first indication information is for PSFCH configuration, that is, the first indication information is information in PSFCH channel configuration information. Compared with other solutions, such as for PUCCH resource and PUCCH format, the signaling overhead can be reduced.

[0269] The first indication information is for PUCCH resource configuration. For example, the first indication information is information in PUCCH resource configuration information. For another example, the first indication information also indicates the corresponding PUCCH resource. This solution can more flexibly control each PUCCH resource and provide greater freedom for network optimization.

[0270] The first indication information is configured for the PUCCH resource group, or the first indication information is information in a PUCCH resource group configuration information. For example, the first indication information also indicates the corresponding PUCCH resource group. This solution can more flexibly control each CORESET and provide greater freedom for network optimization.

[0271] The first indication information is configured for the PUCCH format, that is, the first indication information is information in the PUCCH format configuration information. For example, the first indication information also indicates the corresponding PUCCH format. This solution can more flexibly control each PUCCH format and provide greater freedom for network optimization.

[0272] Optionally, the DMRS pattern indicated by the first indication information is not used in the following situations:

[0273] PUCCH format 0: PUCCH transmission that only feeds back ACK / NACK.

[0274] That is, the above two situations still use the system default or pre-defined DMRS, so that the default DMRS is used for some basic control channels, avoiding the ambiguity stage when switching between different DMRSs and improving system stability.

[0275] In this embodiment, the first terminal device uses the corresponding DMRS to perform corresponding control channel transmission based on the first indication information. In a specific implementation, the first terminal may receive two or more first indication information, for example, one of the first indication information corresponds to one PUCCH format, and another configuration information corresponds to another PUCCH format. For another example, one of the first indication information corresponds to one PUCCH resource, and another configuration information corresponds to another PUCCH resource. This can be extended to more first indication information because it can be directly extended and is not described one by one.

[0276] Optionally, if control channel retransmission (i.e., PUCCH repetition) is used, the corresponding DMRS pattern remains the same in one or more of the following parameters:

[0277] Whether DMRS and control information use at least one of the same RE (i.e., at least one shared RE); whether all DMRS REs are simultaneously used for control information (i.e., all DMRS REs are shared REs); the same frequency domain density; the same time domain density; the same power parameters.

[0278] Optionally, for a data channel (e.g., PUSCH or PSSCH), there is an independent DMRS configuration information. The DMRS corresponding to the data channel and the control channel maintain the same configuration in one or more of the following parameters:

[0279] All REs in the DMRS pattern are used for data or control information transmission (i.e., all DMRS REs are shared REs); the DMRS patterns corresponding to the data channel and the control channel either have one or more REs used for data or control information transmission (i.e., both contain at least one shared RE), or neither RE is used for data or control information transmission (i.e., neither DMRS has shared REs); the power parameters are the same; the sequence generation method is the same (single-port DMRS for data PDSCH); the frequency domain density; and the time domain density.

[0280] Among them, for the parameters that do not maintain the same configuration for the control channel and the data channel among the above parameters, the control channel and the data channel are configured independently.

[0281] Optionally, before the above steps, the first terminal device reports the first terminal capability (i.e., the above capability information) to the first network device, and the above first terminal capability indicates that the first terminal device supports receiving the first indication information, and the above first indication information indicates the first demodulation reference signal of the control channel, or the above first terminal capability indicates that the first terminal device supports 2 or more DMRS modes of the control channel.

[0282] Optionally, the first terminal capability is transmitted via RRC signaling or MAC CE.

[0283] Optionally, the first terminal capability is reported for the frequency band (i.e., different frequency bands can independently report corresponding capabilities, per band). Independent reporting of different frequency bands can allow the terminal to have greater freedom. For example, the terminal can support it on one or some bands, but not on other bands, thereby allowing more terminals to support this new function.

[0284] Optionally, the first terminal capability is reported independently according to the frequency band combination (per band combination). Independent reporting of different frequency band combinations can allow the terminal to have greater freedom. For example, the terminal may not support this function under a certain frequency band combination, but support this function under another frequency band combination, thereby allowing more terminals to support this new function.

[0285] Optionally, the first terminal capability is reported independently according to each frequency band in the band combination (that is, the frequency bands in different frequency band combinations can be reported independently, per band per band combination). Independent reporting of different frequency band combinations can allow the terminal to have greater freedom. For example, the terminal may not support this function under a certain CA, but support this function in certain bands under another CA combination, thereby allowing more terminals to support this new function.

[0286] Optionally, the first terminal capability is reported independently according to each carrier on each frequency band in the frequency band combination (that is, different carrier CCs in frequency bands in different frequency band combinations can be reported independently, per CC per band per band combination, or FSPC), different frequency band combinations are reported independently, and different carriers on a band can also be reported independently, which can allow the terminal to have greater freedom, thereby allowing more terminals to support this new function.

[0287] Optionally, the first terminal capability is reported according to the frequency range (i.e., different FRs can be reported independently, per FR, i.e., FR1 and FR2 are reported independently). Independent reporting of different FRs allows the terminal to have greater freedom. For example, the terminal does not support this function in the low frequency (FR1), but supports this function in FR2 (high frequency), thereby allowing more terminals to support this new function.

[0288] Optionally, the first terminal capability is reported per UE (ie, per UE, that is, if the UE reports this capability, then this capability can be supported on all frequency bands, which can reduce the signaling overhead of the terminal capability reporting.

[0289] Optionally, before the above steps, the first terminal device reports the second terminal capability to the first network device, and the above second terminal capability indicates that the first terminal device supports the first DMRS mode of the control channel, and one or more or all REs of the above first DMRS mode are also REs used for control information (i.e., shared REs).

[0290] Optionally, the second terminal capability is transmitted via RRC signaling or MAC CE.

[0291] Optionally, the second terminal capability is reported for the frequency band (i.e., different frequency bands can independently report corresponding capabilities, per band). Independent reporting of different frequency bands can allow the terminal to have greater freedom. For example, the terminal can support it on one or some bands, but not on other bands, thereby allowing more terminals to support this new function.

[0292] Optionally, the second terminal capability is reported independently according to the frequency band combination (per band combination). Independent reporting of different frequency band combinations can allow the terminal to have greater freedom. For example, the terminal may not support this function under a certain frequency band combination, but support this function under another frequency band combination, thereby allowing more terminals to support this new function.

[0293] Optionally, the second terminal capability is reported independently according to each frequency band in the band combination (that is, the frequency bands in different frequency band combinations can be reported independently, per band per band combination). Independent reporting of different frequency band combinations can allow the terminal to have greater freedom. For example, the terminal may not support this function under a certain CA, but some bands under another CA combination may support this function, allowing more terminals to support this new function.

[0294] Optionally, the second terminal capability is reported independently according to each carrier on each frequency band in the band combination (that is, different carrier CCs in frequency bands in different frequency band combinations can be reported independently, per CC per band per band combination, or FSPC), different frequency band combinations are reported independently, and different carriers on a band can also be reported independently, which can allow the terminal to have greater freedom and allow more terminals to support this new function.

[0295] Optionally, the second terminal capability is reported according to the frequency range (i.e., different FRs can be reported independently, per FR, i.e., FR1 and FR2 are reported independently). Independent reporting of different FRs can allow the terminal to have greater freedom. For example, the terminal does not support this function in the low frequency (FR1), but supports this function in FR2 (high frequency), thereby allowing more terminals to support this new function.

[0296] Optionally, the second terminal capability is reported per UE (ie, per UE, that is, if the UE reports this capability, this capability can be supported on all frequency bands), which can reduce the signaling overhead of terminal capability reporting.

[0297] Optionally, the first terminal capability and / or the second terminal capability further include one or more of the following capabilities (for the DMRS mode of the control channel):

[0298] Supported power parameters; supported DMRS patterns; supported DMRS frequency domain density; supported DMRS time domain density.

[0299] Optionally, the first terminal capability and / or the second terminal capability are reported on a PUCCH.

[0300] Optionally, the first terminal capability and / or the second terminal capability are reported for PSFCH.

[0301] Optionally, the first terminal capability and / or the second terminal capability are reported independently for different PUCCH formats. For example, the first terminal capability and / or the second terminal capability are reported for PUCCH format 2, and support for the first terminal capability and / or the second terminal capability may be reported for PUCCH format 3, or support for the first terminal capability and non-support for the second terminal capability may not be reported.

[0302] Example 2

[0303] The solution shown in this embodiment introduces a new PUCCH type, that is, a DMRS pattern is set for each PUCCH type.

[0304] Assume that the system supports P different PUCCH types. For simplicity of description, this embodiment takes P = 2 PUCCH types as an example, which are respectively recorded as the first PUCCH type and the second PUCCH type. It can be easily and directly extended to more different PUCCH types, and no further description is given. Among them, optionally:

[0305] One or more or all REs of the DMRS pattern corresponding to the first PUCCH type (denoted as the first DMRS pattern) are also REs used for control information, that is, the first DMRS pattern and the control information are not orthogonal in time-frequency resources (referred to as non-orthogonal DMRS mode for short). The DMRS pattern and the control information use the same REs, so that the control information can use more REs, thereby improving transmission reliability. Alternatively, the REs of the DMRS pattern corresponding to the first PUCCH type (denoted as the first DMRS pattern) do not overlap with the REs used for control information, that is, the first DMRS uses different REs from the control information (called orthogonal DMRS). Using orthogonal DMRS requires less modification to the original system and is easier to implement.

[0306] The REs of the DMRS pattern corresponding to the second PUCCH type (referred to as the second DMRS pattern) do not overlap with the REs used for control information. That is, the second DMRS pattern uses different REs than the control information. In other words, the second DMRS pattern and the control information are orthogonal in time-frequency resources (referred to as orthogonal DMRS).

[0307] The first PUCCH type differs from the existing 5G PUCCH format 0 because 5G PUCCH format 0 does not use the DMRS pattern. However, the first PUCCH type uses the DMRS pattern. One implementation involves linearly weighting (i.e., multiplying by a coefficient) the DMRS pattern and control information across all REs used by the PUCCH and transmitting them over the same REs. For example, in a transmission, the first PUCCH type uses one PRB and six symbols. Therefore, the control information and DMRS pattern are present on all REs.

[0308] The first PUCCH type and the second PUCCH type use the same amount of time domain resources and the same amount of frequency domain resources, where the time domain / frequency domain resources include the total time-frequency resources used by the DMRS and control information.

[0309] The PUCCH type here can also be a PSFCH type. To simplify the description, it is collectively referred to as PUCCH type.

[0310] One possible implementation is that the above P PUCCH types all belong to the same PUCCH format (here refers to the PUCCH format concept in 5G / NR, such as PUCCH format 3, etc.).

[0311] The first terminal device receives a second indication message sent by the first network device or the second terminal device (corresponding to the sidelink scenario), where the second indication message indicates whether to use the first PUCCH type or the second PUCCH type. This solution can flexibly indicate or configure the DMRS mode of the control channel to better match the wireless environment and improve system performance.

[0312] If the second indication information is sent by the first network device, then the control channel corresponds to an uplink control channel (eg, PUCCH).

[0313] If the second indication information is sent by the second terminal device, then the control channel corresponds to a sidelink feedback channel (eg, PSFCH).

[0314] Optionally, the second indication information may be implemented through one or more of the following message / signaling combinations:

[0315] Broadcast message MIB; system message SIB1; RRC signaling; MAC CE signaling; DCI signaling; downlink messages in the random access process, such as MsgB, Msg2, Msg3, Msg4; AI / ML dedicated signaling.

[0316] For example, the second indication information is indicated by RRC signaling and MAC CE signaling. For another example, the second indication information is indicated by system message and RRC signaling. Other combinations are not given one by one, and can be directly generalized.

[0317] For the solution using two types of signaling / messages, it can also be indications from multiple signals / messages of the same type. For example, the second indication message can correspond to multiple RRC signalings, that is, different information in the second indication message is indicated by different RRC signalings.

[0318] Different second indication messages may indicate different DMRSs. For example, in one indication, the second indication message indicates the first PUCCH type, while in another indication, the second indication message may indicate the second PUCCH type.

[0319] Optionally, there may be at least one group of PUCCH types, where each group of PUCCH types includes at least one first PUCCH type and at least one second PUCCH type. For example, when DCI is used to transmit the second indication information, a specific PUCCH type may be indicated for a group of PUCCH types. For ease of description, the group consisting of the first PUCCH type and the second PUCCH type may be referred to as a first group of control channel types (first group of PUCCH types).

[0320] Optionally, there may be multiple second indication information, for example, K>=2 second indication information respectively indicating K groups of PUCCH types (each group of PUCCH type includes at least one first PUCCH type and at least one second PUCCH type).

[0321] Optionally, the second indication information includes at least one first field, which may be implemented in different ways:

[0322] Option 1: Uses different values ​​to indicate whether the PUCCH type is the first or second type. For example, when the first field takes the first value, it indicates the first PUCCH type; when the first field takes the second value, it indicates the second PUCCH type. This option offers greater flexibility than Option 2 / 3 because it can indicate more DMRSs, not just two.

[0323] Option 2: When the first domain is configured, the first PUCCH type is indicated; when the first domain is not configured, the control channel uses the second PUCCH type (i.e., implicitly indicates the second PUCCH type). In this case, the second PUCCH type is the default PUCCH type. The second PUCCH type can be determined based on pre-defined rules (e.g., protocol specifications) and / or network broadcast information / system information. This solution can save signaling overhead.

[0324] Optionally, when the first domain is configured, its value may be "enabled" or "support", or variations thereof (eg, enable, supported, and other related forms).

[0325] Option 3: When the first domain is configured, the second PUCCH type is indicated; when the first domain is not configured, the control channel uses the first PUCCH type (ie, implicitly indicates the first PUCCH type). This solution can save signaling overhead.

[0326] For example, when the second indication information is indicated by DCI, 1 bit can be used to indicate 2 different PUCCH types (when more PUCCH types are to be indicated, more bits are required). Optionally, the above DCI also indicates the corresponding PUCCH resource through the "PUCCH resource indicator" field, and the PUCCH type indicated by the above DCI is used for the above PUCCH resource. A specific implementation is to pre-set P' (P'<=P) PUCCH types, or configure P' (P'<=P) PUCCH types through RRC and / or MAC CE, and then DCI indicates the PUCCH resource and its corresponding PUCCH type (one of the above P' PUCCH types) through the corresponding two fields. Optionally, the above two fields can also be jointly encoded into one field, and the value of this field indicates the PUCCH resource and one of the P' PUCCH types at the same time. The entire system can support P PUCCH types, but for a certain UE, only P' PUCCH types may be configured for use.

[0327] Optionally, the second indication information indicates whether it is the first PUCCH type or the second PUCCH type by configuring different fields through a CHOICE structure.

[0328] Optionally, the configuration / parameters related to the first PUCCH type and the second PUCCH type (including their corresponding DMRS configuration information) are pre-specified, and the second indication information indicates whether to use the first PUCCH type or the second PUCCH type. For example, the second indication information contains a field, and different values ​​are used to indicate different PUCCH types. Different PUCCH types can also be indicated by whether this field is configured. For example, one implementation is that when this field is not configured, the second PUCCH type is indicated, and when this field is configured, the first PUCCH type is indicated; another implementation is the other way around, when this field is not configured, the first PUCCH type is indicated, and when this field is configured, the second PUCCH type is indicated. By pre-specifying, the signaling overhead can be reduced.

[0329] Optionally, the configuration / parameters related to the first PUCCH type (including the corresponding DMRS configuration information) are pre-specified, that is, the first PUCCH type is the default PUCCH type; the second indication information indicates one or more parameters of the second PUCCH type. For example, the second indication information contains one or more fields, which are used to indicate the parameters of the second PUCCH type; if this field is not configured, then it corresponds to the first PUCCH type (i.e., the default PUCCH type). On the one hand, if only the default PUCCH type is used, the signaling overhead can be reduced, while also providing sufficient flexibility to configure another PUCCH type.

[0330] Optionally, a second PUCCH type-related configuration / parameter (including corresponding DMRS configuration information) is pre-specified, that is, the second PUCCH type is the default PUCCH type; the second indication information indicates one or more parameters of the first PUCCH type. For example, the second indication information contains one or more fields, which are used to indicate the parameters of the first PUCCH type; if the secondary field is not configured, then the second PUCCH type (i.e., the default PUCCH type) corresponds. On the one hand, if only the default PUCCH type is used, the signaling overhead can be reduced, while also providing sufficient flexibility to configure another PUCCH type.

[0331] Optionally, the second indication information indicates one or more parameters of the first PUCCH type, or one or more parameters of the second PUCCH type. For example, the second indication information contains one or more fields, and the parameters of the first PUCCH type or the second PUCCH type are indicated by this field. For another example, the second indication information indicates whether it is the first PUCCH type or the second PUCCH type by configuring different fields through the CHOICE structure. There are 2 different fields in the CHOICE structure. When the first field is configured, it is used to indicate the first PUCCH foramt, and when the second field is configured, it is used to indicate the second PUCCH foramt. This solution flexibly configures each PUCCH type and can provide optimization space for the system.

[0332] If the DMRS pattern used by the first PUCCH type is an orthogonal DMRS pattern:

[0333] The time-frequency resources used by the first DMRS and the second DMRS are different, that is, the time-frequency resources used by the first DMRS pattern and the second DMRS pattern are at least partially different. For example, they may differ in one or more of the following:

[0334] The first DMRS pattern and the second DMRS pattern have different densities in the time domain;

[0335] The first DMRS pattern and the second DMRS pattern have different densities in the frequency domain;

[0336] The first DMRS pattern and the second DMRS pattern have different positions in the frequency domain;

[0337] The first DMRS pattern and the second DMRS pattern have different positions in the time domain;

[0338] The first DMRS pattern and the second DMRS pattern have different sequence generation parameters;

[0339] The first DMRS pattern and the second DMRS pattern are generated by different methods;

[0340] The first DMRS pattern and the second DMRS pattern have different power parameters.

[0341] If the first DMRS pattern and the second DMRS pattern use different numbers of symbols in the time domain (i.e., different time domain densities), if DCI is used to transmit the first indication information, then when the speed of the first terminal device increases, the network can quickly instruct to use more symbols for DMRS transmission, thereby better coping with the time-varying characteristics of the channel; when the speed of the first terminal device decreases, the network can quickly instruct to use fewer symbols for DMRS transmission, thereby using more symbols for the transmission of control information.

[0342] At this time, the generation methods of the first PUCCH type and the second PUCCH type are similar. The main difference comes from the different number of symbols used by DMRS and other differences caused by it (for example, the symbols used for control information are different, resulting in changes in its coding rate. If spread is required, the orthogonal sequence or orthogonal code (orthogonal sequence, orthogonal code) length used is different). That is to say, the steps for generating the first PUCCH type and the second PUCCH type signals are the same, and the only difference is that the time-frequency resources that can be used by the control information due to the DMRS mode are adjusted accordingly. For example, the first PUCCH type and the second PUCCH type can use the same PUCCH format in the existing 5G, but the DMRS density in the time domain is different. The steps / methods for generating signals for different PUCCH formats in the existing 5G (such as PUCCH format 1 and PUCCH format 2) are different. Therefore, the first PUCCH type and the second PUCCH type in this solution are different concepts from different PUCCH formats in 5G. For example, all PUCCH types in the aforementioned group of PUCCH types can correspond to a certain PUCCH format in 5G (such as PUCCH format 3).

[0343] The first DMRS and / or the second DMRS may have one or more of the following parameters: frequency domain density; time domain density; frequency domain resource location; time domain resource location; DMRS sequence generation parameters; power-related parameters.

[0344] If the DMRS pattern used by the first PUCCH type is a non-orthogonal DMRS pattern, the DMRS pattern may have one or more of the following parameters: frequency domain density; time domain density; frequency domain resource location; time domain resource location; DMRS sequence generation parameters; and power-related parameters.

[0345] Optionally, the second indication information indicates a power parameter of the first DMRS pattern, or the power parameter of the first DMRS pattern is pre-specified (e.g., pre-specified by a protocol, or pre-specified by network broadcast information, etc.). If indicated by the second indication information, the power allocation of the DMRS can be flexibly indicated, so that the system can optimize the DMRS transmission power according to the wireless environment and improve system performance; if it is pre-specified, signaling overhead can be saved.

[0346] Optionally, the power parameter is indicated on a shared RE.

[0347] The ratio of the power of DMRS transmitted on the shared RE to the total power on the shared RE (ie, the total power of DMRS and data); or

[0348] The ratio of the power of data transmitted on the shared RE to the total power on the shared RE (ie, the total power of DMRS and data); or

[0349] The ratio of the power of DMRS transmitted on the shared RE to the power of data on the shared RE; or

[0350] The ratio of the power of data transmitted on the shared RE to the DMRS power on the shared RE; or

[0351] The ratio of the DMRS transmission power to the total power on an RE (regardless of whether the RE is shared).

[0352] The above ratio can be a linear value or a dB value. For example, a linear value of 0.1 corresponds to a dB value of -10dB or 10dB.

[0353] Optionally, the second indication information indicates the frequency domain resource density and / or frequency domain resource position of the DMRS corresponding to the first DMRS pattern, or the frequency domain resource density and / or frequency domain resource position of the DMRS corresponding to the first DMRS pattern is pre-specified (e.g., pre-specified by a protocol, or pre-specified by network broadcast information, etc.). The first DMRS frequency domain resource position can be flexibly changed, thereby better facilitating multi-user multiplexing and reducing DMRS interference between users.

[0354] For example, the second indication information may indicate the density of the DMRS corresponding to the first DMRS pattern in the frequency domain (for example, indicating how many REs are occupied in one RB), and / or the offset value of the DMRS corresponding to the first DMRS pattern in the frequency domain (for example, RE offset value). Alternatively, the second indication information may indicate which frequency domain resources are occupied by the DMRS corresponding to the first DMRS pattern by means of a bitmap or by directly indicating the frequency domain resource (for example, RE, RB) number. This solution has high flexibility.

[0355] For another example, as another implementation, the second indication information can directly indicate which frequency domain pattern to use for the first DMRS mode, where these alternative frequency domain patterns are determined by pre-defined rules and / or network configuration. One of the frequency domain patterns identifies which resources in the frequency domain can be used for DMRS transmission. This solution has lower signaling overhead.

[0356] For another example, as another implementation, a frequency domain pattern is predefined, and as long as the second indication information indicates the first DMRS mode, the predefined frequency domain pattern is adopted.

[0357] Optionally, the second indication information indicates the time domain density and / or time domain resource position of the DMRS corresponding to the first DMRS pattern. For example, the second indication information indicates the time domain density of the DMRS corresponding to the first DMRS pattern, that is, indicates that the DMRS corresponding to the first DMRS pattern is transmitted on one symbol in every Z symbols. For another example, the second indication information indicates which symbols (for example, which symbols within a slot) are used by the DMRS corresponding to the first DMRS pattern by means of a bitmap or directly indicating the symbol number. The time domain density and / or time domain resource position of the first DMRS can be flexibly changed, and a good compromise can be achieved between performance and complexity.

[0358] For another example, as another implementation, the second indication information can directly indicate which time domain pattern to use for the first DMRS pattern, where these alternative time domain patterns are determined by pre-defined rules and / or network configuration. The two time domain patterns identify which symbols carry DMRS. This solution has lower signaling overhead.

[0359] Optionally, the second indication information indicates a sequence generation parameter of the first DMRS pattern.

[0360] Optionally, the generation of the sequence of the first DMRS pattern is based on one or more of the following parameters:

[0361] The current slot number where the DMRS is located;

[0362] The current symbol number of the DMRS, or the current symbol number of the first DMRS within a slot;

[0363] The current SFN number where the DMRS is located;

[0364] The current cell ID where the DMRS is located, or the physical layer cell ID (PCI);

[0365] The current carrier number where the DMRS is located (here refers to the carrier in carrier aggregation, that is, component carrier, or simply carrier);

[0366] Different DMRS port numbers, for example, the sequence corresponding to the first DMRS port i is generated based on the port number i;

[0367] The number of the control channel that schedules the corresponding data (for example, the group number corresponding to CORESET);

[0368] Other parameters related to network configuration.

[0369] One or more parameters in the above examples can be indicated by the second indication information, which can improve flexibility.

[0370] If DCI is used to transmit the second indication information, when the network wants to improve performance, the network can quickly instruct the first terminal to use the first PUCCH type (using non-orthogonal DMRS mode), so that the network can improve performance through advanced receivers (such as AI / ML receivers); when the network wants to save its own power consumption and wants to use a simple receiver, the network can quickly instruct the first terminal to use the second PUCCH type (i.e., orthogonal DMRS mode).

[0371] For example, the second indication information may indicate one of N>=3 different PUCCH types. Taking P=3 as an example, there are two second PUCCH types (i.e., their corresponding DMRS and control information are orthogonal) and one first PUCCH type (i.e., its corresponding DMRS and control information are not orthogonal).

[0372] Based on any of the above, the second indication information can be configured for different objects, such as:

[0373] The second indication information is configured for a cell, that is, the second indication information is information in the configuration information of the control channel in a cell. Compared with other solutions, such as for PUCCH resource and PUCCH format, signaling overhead can be reduced.

[0374] The second indication information is configured for a carrier, that is, the second indication information is information in the configuration information of the control channel in a carrier. Compared with other solutions, such as for PUCCH resource and PUCCH format, signaling overhead can be reduced.

[0375] The second indication information is configured for a BWP (BWP here refers to the BWP concept in NR), that is, the second indication information is information in the configuration information of the control channel in a BWP. Compared with other schemes, such as CORESET and search space, it can reduce signaling overhead.

[0376] The second indication information is for PSFCH configuration, that is, the second indication information is information in PSFCH channel configuration information. Compared with other solutions, such as PUCCH resource and PUCCH format, signaling overhead can be reduced.

[0377] The second indication information is configured for the PUCCH type group. For example, the second indication information is information in the configuration information of a PUCCH type group. For another example, the second indication information also indicates a PUCCH type group. This allows for more flexible control of each PUCCH type group, providing greater freedom for network optimization.

[0378] The second indication information is configured for the PUCCH resource group, or the second indication information is information in a PUCCH resource group configuration information. For example, the second indication information also indicates the corresponding PUCCH resource group, which can more flexibly control each CORESET and provide greater freedom for network optimization.

[0379] The second indication information is configured for PUCCH resourcet, that is, the second indication information is information in PUCCH resource configuration information. For example, the second indication information also indicates the corresponding PUCCH resource, which can more flexibly control each PUCCH resource and provide greater freedom for network optimization.

[0380] The second indication information is configured for the PUCCH format, that is, the second indication information is information in the PUCCH format configuration information. For example, the second indication information also indicates the corresponding PUCCH format, which can more flexibly control each PUCCH format and provide greater freedom for network optimization.

[0381] Among them, the first terminal device uses the corresponding DMRS mode to perform control channel transmission according to the second indication information.

[0382] Optionally, if control channel repetition (i.e., PUCCH repetition, PSFCH repetition) is used, the PUCCH type and DMRS may remain the same in one or more of the following parameters:

[0383] Whether DMRS and control information use at least one of the same REs (i.e., at least one shared RE); whether all DMRS REs are used for control information at the same time (i.e., all DMRS REs are shared REs); DMRS frequency domain density; DMRS time domain density; DMRS power parameters; the same PUCCH type.

[0384] Optionally, before the above steps, the first terminal device reports a third terminal capability to the first network device, and the above third terminal capability indicates that the first terminal device supports receiving the second indication information, and the above second indication information indicates the first PUCCH type or the second PUCCH type, or the above first terminal capability indicates that the first terminal device supports the first PUCCH type and the second PUCCH type.

[0385] Optionally, the third terminal capability is transmitted via RRC signaling or MAC CE.

[0386] Optionally, the third terminal capability is reported for a frequency band (ie, different frequency bands can independently report corresponding capabilities, per band).

[0387] Optionally, the third terminal capability is reported independently according to a band combination (per band combination).

[0388] Optionally, the third terminal capability is reported independently according to each frequency band in a band combination (ie, frequency bands in different frequency band combinations can be reported independently, per band per band combination).

[0389] Optionally, the third terminal capability is reported independently on each carrier on each frequency band in a band combination (ie, different carriers CC in frequency bands in different frequency band combinations can be reported independently, per CC per band per band combination, or FSPC).

[0390] Optionally, the third terminal capability is reported according to a frequency range (Frequency range) (ie, different FRs can be reported independently, per FR, that is, FR1 and FR2 are reported independently).

[0391] Optionally, the third terminal capability is reported per UE (ie, per UE, that is, if the UE reports this capability, then this capability can be supported on all frequency bands).

[0392] Optionally, before the above steps, the first terminal device reports a fourth terminal capability to the first network device, and the above fourth terminal capability indicates that the first terminal device supports a first PUCCH type, wherein one or more or all REs of the first DMRS corresponding to the first PUCCH type are also REs used for control information (i.e., shared REs).

[0393] Optionally, the fourth terminal capability is transmitted via RRC signaling or MAC CE.

[0394] Optionally, the fourth terminal capability is reported for a frequency band (ie, different frequency bands can independently report corresponding capabilities, per band).

[0395] Optionally, the fourth terminal capability is independently reported according to a band combination (per band combination).

[0396] Optionally, the fourth terminal capability is reported independently according to each frequency band in a band combination (ie, frequency bands in different frequency band combinations can be reported independently, per band per band combination).

[0397] Optionally, the fourth terminal capability is reported independently on each carrier on each frequency band in a band combination (ie, different carriers CC in frequency bands in different frequency band combinations can be reported independently, per CC per band per band combination, or FSPC).

[0398] Optionally, the fourth terminal capability is reported according to a frequency range (Frequency range) (ie, different FRs can be reported independently, per FR, that is, FR1 and FR2 are reported independently).

[0399] Optionally, the fourth terminal capability is reported for UE (ie, per UE, that is, if the UE reports this capability, this capability can be supported on all frequency bands).

[0400] Optionally, the third terminal capability and / or the fourth terminal capability further includes one or more of the following capabilities (for PUCCH type DMRS):

[0401] Supported power parameters; supported DMRS patterns; supported DMRS frequency domain density; supported DMRS time domain density.

[0402] Optionally, the third terminal capability and / or the fourth terminal capability are reported for PUCCH.

[0403] Optionally, the third terminal capability and / or the fourth terminal capability are reported for PSFCH.

[0404] Please refer to Figure 7, which shows a block diagram of a control channel transmission device provided by an embodiment of the present application. The control channel transmission device has the function of implementing the method shown in any of Figures 3 to 6 above, which is performed by the first device. As shown in Figure 7, the device may include:

[0405] A receiving module 701 is configured to receive indication information, where the indication information is used to indicate a first demodulation reference signal (DMRS) pattern or a first control channel type, where the first control channel type corresponds to the first DMRS pattern; the first DMRS pattern is one of multiple DMRS patterns;

[0406] The transmission module 702 is configured to transmit the control channel according to the DMRS mode indicated by the indication information.

[0407] In some embodiments, the indication information is carried by one or more of the following message / signaling combinations:

[0408] Broadcast messages; system messages; radio resource control (RRC) signaling; media access control (MAC) control unit (CE); downlink control information (DCI) signaling; downlink messages during random access; and dedicated signaling for artificial intelligence (AI) / machine learning (ML).

[0409] In some embodiments, the indication information is used to indicate the first DMRS pattern or the first control channel type corresponding to the control channel with respect to a control channel format and / or a control channel resource;

[0410] The transmission module 702 is configured to transmit the control channel according to the DMRS mode indicated by the indication information and in accordance with the control channel format and / or control channel resources.

[0411] In some embodiments, the multiple DMRS patterns are all orthogonal DMRS patterns;

[0412] Alternatively, one or more DMRS patterns among the multiple DMRS patterns are non-orthogonal DMRS patterns.

[0413] In some embodiments, the multiple DMRS patterns each have one or more of the following parameters:

[0414] Frequency domain density of time-frequency resources used by DMRS; time domain density of time-frequency resources used by DMRS; frequency domain resource location of time-frequency resources used by DMRS; time domain resource location of time-frequency resources used by DMRS; DMRS sequence generation parameters; DMRS sequence generation method; power parameters.

[0415] In some embodiments, among the multiple DMRS patterns, values ​​of all or part of the parameters between any two DMRS patterns are different.

[0416] In some embodiments, when one or more DMRS patterns among the multiple DMRS patterns are non-orthogonal DMRS patterns, and the non-orthogonal DMRS patterns have power-related parameters, the power parameters of the non-orthogonal DMRS patterns are used to indicate one or more of the following parameters on the shared resource unit RE:

[0417] a ratio of the transmit power of the DMRS on the shared RE to the total transmit power on the shared RE;

[0418] a ratio of the transmit power of data on the shared RE to the total transmit power on the shared RE;

[0419] The ratio of the transmit power of the DMRS on the shared RE to the transmit power of the data on the shared RE;

[0420] The ratio of the transmit power of data on the shared RE to the transmit power of DMRS on the shared RE;

[0421] The ratio of the DMRS transmit power on one RE to the total transmit power on the RE.

[0422] In some embodiments, the indication information is further used to indicate the frequency domain resource density and / or frequency domain resource position of the DMRS in the first DMRS mode;

[0423] Alternatively, the frequency domain resource density and / or frequency domain resource position of the DMRS in the first DMRS mode is predefined.

[0424] In some embodiments, the indication information is further used to indicate the time domain density and / or time domain resource position of the DMRS in the first DMRS mode;

[0425] Alternatively, the time domain density and / or time domain resource position of the DMRS in the first DMRS mode is predefined.

[0426] In some embodiments, the indication information is further used to indicate a sequence generation parameter of the first DMRS pattern.

[0427] In some embodiments, the sequence generation parameters include one or more of the following:

[0428] The slot number of the DMRS; the symbol number of the DMRS, or the number of the symbol of the DMRS within a slot; the system frame number (SFN) number of the DMRS; the cell number of the DMRS, or the physical layer cell number of the DMRS; the carrier number of the DMRS; the port number of the DMRS; the number corresponding to the data scheduling control channel; the feedback information of the data scheduled by the data scheduling control channel is carried by the above-mentioned control channel; the DMRS scrambling parameters; and other relevant parameters of the network configuration.

[0429] In some embodiments, the indication information is configured for a corresponding cell; or,

[0430] The indication information configures the corresponding carrier; or,

[0431] The indication information configures the corresponding bandwidth part BWP; or,

[0432] The indication information corresponds to configuring a physical sidelink feedback channel PSFCH; or,

[0433] The indication information configures the physical uplink control channel PUCCH resources; or,

[0434] The indication information is configured corresponding to the PUCCH resource group; or,

[0435] The indication information is configured corresponding to the PUCCH format.

[0436] In some embodiments, the DMRS pattern indicated by the indication information is not used for PUCCH format 0;

[0437] Alternatively, the DMRS pattern indicated by the indication information is not used for PUCCH transmission that only feeds back ACK / NACK.

[0438] In some embodiments, for a repeatedly transmitted control channel, one or more of the following parameters of the corresponding DMRS are the same:

[0439] Whether at least one of the same REs is used with the control information;

[0440] Whether all REs corresponding to DMRS are used for control information at the same time;

[0441] Frequency domain density of time-frequency resources used by DMRS;

[0442] The time domain density of the time-frequency resources used by DMRS;

[0443] Power parameters.

[0444] In some embodiments, the configuration information of the multiple DMRS modes is the same as one or more of the following parameters of the DMRS configuration information of the data channel: power parameter; DMRS sequence generation method; frequency domain density of the time-frequency resources used by DMRS; time domain density of the time-frequency resources used by DMRS.

[0445] In some embodiments, the apparatus further comprises:

[0446] A sending module, configured to report capability information to the second device;

[0447] The capability information is used to indicate one or more of the following: the first device supports receiving the indication information; the multiple DMRS modes supported by the first device; the multiple control channel types supported by the first device; the first device supports non-orthogonal DMRS mode; and the first device supports the first DMRS mode or the first control channel type.

[0448] In some embodiments, the capability information is reported via one or more of the following messages:

[0449] RRC signaling, and MAC CE.

[0450] In some embodiments, the capability information is reported for a frequency band;

[0451] The capability information is reported independently according to the frequency band combination;

[0452] The capability information is reported independently for each frequency band in the frequency band combination;

[0453] The capability information is reported independently for each carrier on each frequency band in the frequency band combination;

[0454] The capability information is reported according to the frequency band range;

[0455] Alternatively, the capability information is reported for the UE.

[0456] In some embodiments, the capability information further includes one or more of the following: supported power parameters; supported frequency domain density of time-frequency resources used by DMRS; supported time domain density of time-frequency resources used by DMRS.

[0457] Please refer to Figure 8, which shows a block diagram of a control channel transmission device provided by an embodiment of the present application. The control channel transmission device has the function of implementing the method shown in any of Figures 3 to 6 above, which is performed by the second device. As shown in Figure 8, the device may include:

[0458] The sending module 801 is used to send indication information to the first device, where the indication information is used to indicate a first demodulation reference signal DMRS mode or a first control channel type, where the first control channel type corresponds to the first DMRS mode; the first DMRS mode is one of multiple DMRS modes; the indication information is used to instruct the first device to transmit a control channel according to the DMRS mode indicated by the indication information.

[0459] In some embodiments, the indication information is carried by one or more of the following message / signaling combinations:

[0460] Broadcast messages; system messages; radio resource control (RRC) signaling; media access control (MAC) control unit (CE); downlink control information (DCI) signaling; downlink messages during random access; and dedicated signaling for artificial intelligence (AI) / machine learning (ML).

[0461] In some embodiments, the indication information is used to indicate the first DMRS pattern or the first control channel type corresponding to the control channel with respect to a control channel format and / or a control channel resource.

[0462] In some embodiments, the multiple DMRS patterns are all orthogonal DMRS patterns;

[0463] Alternatively, one or more DMRS patterns among the multiple DMRS patterns are non-orthogonal DMRS patterns.

[0464] In some embodiments, the multiple DMRS patterns have one or more of the following parameters:

[0465] Frequency domain density of time-frequency resources used by DMRS; time domain density of time-frequency resources used by DMRS; frequency domain resource location of time-frequency resources used by DMRS; time domain resource location of time-frequency resources used by DMRS; DMRS sequence generation parameters; DMRS sequence generation method; power parameters.

[0466] In some embodiments, among multiple DMRS patterns, the values ​​of all or part of the parameters between any two DMRS patterns are different.

[0467] In some embodiments, when one or more DMRS patterns among the multiple DMRS patterns are non-orthogonal DMRS patterns, and the non-orthogonal DMRS patterns have power-related parameters, the power parameters of the non-orthogonal DMRS patterns are used to indicate one or more of the following parameters on the shared resource unit RE:

[0468] a ratio of the transmit power of the DMRS on the shared RE to the total transmit power on the shared RE;

[0469] a ratio of the transmit power of data on the shared RE to the total transmit power on the shared RE;

[0470] The ratio of the transmit power of the DMRS on the shared RE to the transmit power of the data on the shared RE;

[0471] The ratio of the transmit power of data on the shared RE to the transmit power of DMRS on the shared RE;

[0472] The ratio of the DMRS transmit power on one RE to the total transmit power on the RE.

[0473] In some embodiments, the indication information is further used to indicate the frequency domain resource density and / or frequency domain resource position of the DMRS in the first DMRS mode;

[0474] Alternatively, the frequency domain resource density and / or frequency domain resource position of the DMRS in the first DMRS mode is predefined.

[0475] In some embodiments, the indication information is further used to indicate the time domain density and / or time domain resource position of the DMRS in the first DMRS mode;

[0476] Alternatively, the time domain density and / or time domain resource position of the DMRS in the first DMRS mode is predefined.

[0477] In some embodiments, the indication information is further used to indicate a sequence generation parameter of the first DMRS pattern.

[0478] In some embodiments, the sequence generation parameters include one or more of the following:

[0479] The slot number of the DMRS; the symbol number of the DMRS, or the number of the symbol of the DMRS within a slot; the system frame number (SFN) number of the DMRS; the cell number of the DMRS, or the physical layer cell number of the DMRS; the carrier number of the DMRS; the port number of the DMRS; the number corresponding to the data scheduling control channel; the feedback information of the data scheduled by the data scheduling control channel is carried by the above-mentioned control channel; the DMRS scrambling parameters; and other relevant parameters of the network configuration.

[0480] In some embodiments, the indication information is configured for a corresponding cell; or,

[0481] The indication information configures the corresponding carrier; or,

[0482] The indication information configures the corresponding bandwidth part BWP; or,

[0483] The indication information corresponds to configuring a physical sidelink feedback channel PSFCH; or,

[0484] The indication information configures the physical uplink control channel PUCCH resources; or,

[0485] The indication information is configured corresponding to the PUCCH resource group; or,

[0486] The indication information is configured corresponding to the PUCCH format.

[0487] In some embodiments, the DMRS pattern indicated by the indication information is not used for PUCCH format 0;

[0488] Alternatively, the DMRS pattern indicated by the indication information is not used for PUCCH transmission that only feeds back ACK / NACK.

[0489] In some embodiments, for a repeatedly transmitted control channel, one or more of the following parameters of the corresponding DMRS are the same:

[0490] Whether at least one of the same REs is used as the control information; whether all REs corresponding to DMRS are used for control information at the same time; the frequency domain density of the time-frequency resources used by DMRS; the time domain density of the time-frequency resources used by DMRS; and power parameters.

[0491] In some embodiments, the configuration information of the multiple DMRS modes is the same as one or more of the following parameters of the DMRS configuration information of the data channel: power parameter; DMRS sequence generation method; frequency domain density of the time-frequency resources used by DMRS; time domain density of the time-frequency resources used by DMRS.

[0492] In some embodiments, the apparatus further comprises:

[0493] A receiving module, configured to receive capability information reported by the first device;

[0494] The capability information is used to indicate one or more of the following:

[0495] The first device supports receiving the indication information;

[0496] the multiple DMRS modes supported by the first device;

[0497] multiple control channel types supported by the first device;

[0498] The first device supports a non-orthogonal DMRS mode;

[0499] And, the first device supports the first DMRS mode or the first control channel type.

[0500] In some embodiments, the capability information is reported via one or more of the following messages:

[0501] RRC signaling, and MAC CE.

[0502] In some embodiments, the capability information is reported for a frequency band;

[0503] The capability information is reported independently according to the frequency band combination;

[0504] The capability information is reported independently for each frequency band in the frequency band combination;

[0505] The capability information is reported independently for each carrier on each frequency band in the frequency band combination;

[0506] The capability information is reported according to the frequency band range;

[0507] Alternatively, the capability information is reported for the UE.

[0508] In some embodiments, the capability information further includes one or more of the following: supported power parameters; supported frequency domain density of time-frequency resources used by DMRS; supported time domain density of time-frequency resources used by DMRS.

[0509] It should be noted that the device provided in the above embodiment only uses the division of the above-mentioned functional modules as an example to implement its functions. In actual applications, the above-mentioned functions can be assigned to different functional modules according to actual needs, that is, the content structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0510] 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.

[0511] Please refer to FIG9 , which shows a schematic diagram of the structure of a communication device 900 provided in one embodiment of the present application. The communication device 900 may include: a processor 901 , a receiver 902 , a transmitter 903 , a memory 904 , and a bus 905 .

[0512] The processor 901 includes one or more processing cores. The processor 901 executes various functional applications and information processing by running software programs and modules.

[0513] Receiver 902 and transmitter 903 can be implemented as a communication component, which can be a communication chip. This communication chip can also be called a transceiver. Memory 904 is connected to processor 901 via bus 905. Memory 904 can be used to store computer programs, and processor 901 is used to execute the computer programs to implement the various steps in the above method embodiments.

[0514] In addition, the memory 904 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, including but not limited to: magnetic disk or optical disk, electrically erasable programmable read-only memory, erasable programmable read-only memory, static random access memory, read-only memory, magnetic memory, flash memory, and programmable read-only memory.

[0515] In an exemplary embodiment, when the communication device 900 is implemented as the above-mentioned first device, the receiver 902 and the processor 901 execute the computer program so that the communication device implements the various steps performed by the first device in any one of the methods shown in Figures 3 to 6.

[0516] In an exemplary embodiment, when the communication device 900 is implemented as the above-mentioned second device, the transmitter 903 and the processor 901 execute the computer program so that the communication device implements the various steps performed by the second device in any one of the methods shown in Figures 3 to 6.

[0517] An embodiment of the present application also provides a computer-readable storage medium, which stores a computer program. The computer program is loaded and executed by a processor to implement all or part of the steps performed by the first device or the second device in any of the methods shown in Figures 3 to 6 above.

[0518] The present application also provides a chip, which includes an integrated circuit and firmware set in the integrated circuit. The chip is used to run in a communication device so that the communication device executes all or part of the steps performed by the first device or the second device in any of the methods shown in Figures 3 to 6 above.

[0519] The present application also provides a computer program product, which includes computer instructions stored in a computer-readable storage medium. A processor of a communication device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the communication device to perform all or part of the steps performed by the first device or the second device in any of the methods shown in Figures 3 to 6 above.

[0520] The present application also provides a computer program, which is executed by a processor of a communication device to implement all or part of the steps performed by the first device or the second device in any of the methods shown in Figures 3 to 6 above.

[0521] Those skilled in the art will appreciate that in one or more of the above examples, the functions described in the embodiments of the present application can be implemented using hardware, software, firmware, or any combination thereof. When implemented using software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any media that facilitates the transmission of computer programs from one place to another. The storage medium can be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0522] The above description is merely an exemplary embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A control channel transmission method, characterized in that: The method is performed by a first device, and includes: receiving indication information, where the indication information is used to indicate a first demodulation reference signal DMRS mode or a first control channel type, where the first control channel type corresponds to the first DMRS mode; and the first DMRS mode is one of multiple DMRS modes; The control channel is transmitted according to the DMRS mode indicated by the indication information.

2. The method according to claim 1, characterized in that The indication information is carried by one or more of the following message / signaling combinations: Broadcast messages; System messages; Radio Resource Control (RRC) signaling; Media access control MAC control unit CE; Downlink control information DCI signaling; Downlink messages during random access; As well as dedicated signaling for artificial intelligence AI / machine learning ML.

3. The method according to claim 1 or 2, characterized in that: The indication information is used to indicate the first DMRS pattern or the first control channel type corresponding to the control channel with respect to a control channel format and / or a control channel resource; The transmitting of the control channel according to the DMRS mode indicated by the indication information includes: According to the DMRS mode indicated by the indication information, the control channel is transmitted according to the control channel format and / or the control channel resource.

4. The method according to any one of claims 1 to 3, characterized in that: The multiple DMRS modes are all orthogonal DMRS modes; or, Among the multiple DMRS patterns, one or more DMRS patterns are non-orthogonal DMRS patterns.

5. The method according to claim 4, characterized in that The multiple DMRS modes respectively have one or more of the following parameters: The frequency domain density of the time-frequency resources used by DMRS; The time domain density of the time-frequency resources used by DMRS; The frequency domain resource location of the time-frequency resources used by DMRS; The time domain resource location of the time-frequency resources used by DMRS; DMRS sequence generation parameters; DMRS sequence generation method; Power parameters.

6. The method according to claim 5, characterized in that Among the multiple DMRS modes, values ​​of all or part of the parameters between any two DMRS modes are different.

7. The method according to any one of claims 4 to 6, characterized in that: In the case where one or more DMRS modes among the multiple DMRS modes are non-orthogonal DMRS modes, and the non-orthogonal DMRS mode has a power-related parameter, the power parameter of the non-orthogonal DMRS mode is used to indicate one or more of the following parameters on the shared resource unit RE: a ratio of the transmit power of the DMRS on the shared RE to the total transmit power on the shared RE; a ratio of the transmit power of data on the shared RE to the total transmit power on the shared RE; a ratio of the transmit power of the DMRS on the shared RE to the transmit power of the data on the shared RE; a ratio of the transmit power of data on the shared RE to the transmit power of DMRS on the shared RE; The ratio of the transmit power of DMRS on one RE to the total transmit power on the RE.

8. The method according to any one of claims 1 to 7, characterized in that: The indication information is further used to indicate the frequency domain resource density and / or frequency domain resource position of the DMRS in the first DMRS mode; Alternatively, the frequency domain resource density and / or frequency domain resource position of the DMRS in the first DMRS mode is predefined.

9. The method according to any one of claims 1 to 8, characterized in that: The indication information is further used to indicate the time domain density and / or time domain resource position of the DMRS in the first DMRS mode; Alternatively, the time domain density and / or time domain resource position of the DMRS in the first DMRS mode is predefined.

10. The method according to any one of claims 1 to 9, characterized in that: The indication information is also used to indicate a sequence generation parameter of the first DMRS pattern.

11. The method according to claim 10, characterized in that The sequence generation parameters include one or more of the following: The timeslot number where the DMRS is located; The symbol number where the DMRS is located, or the symbol number where the DMRS is located within a slot; The system frame number SFN number where the DMRS is located; The cell number where the DMRS is located, or the physical layer cell number where the DMRS is located; The carrier number where the DMRS is located; DMRS port number; A number corresponding to a data scheduling control channel; wherein feedback information of data scheduled by the data scheduling control channel is carried by the control channel; DMRS scrambling parameters; And other related parameters of network configuration.

12. The method according to any one of claims 1 to 11, characterized in that: The indication information is configured for the corresponding cell; or, The indication information configures the corresponding carrier; or, The indication information configures the corresponding bandwidth part BWP; or, The indication information is configured corresponding to a physical sidelink feedback channel PSFCH; or, The indication information configures a physical uplink control channel PUCCH resource corresponding to the physical uplink control channel PUCCH; or, The indication information is configured corresponding to the PUCCH resource group; or, The indication information is configured corresponding to the PUCCH format.

13. The method according to any one of claims 1 to 12, characterized in that: The DMRS mode indicated by the indication information is not used for PUCCH format 0; Alternatively, the DMRS pattern indicated by the indication information is not used for PUCCH transmission that only feeds back ACK / NACK.

14. The method according to any one of claims 1 to 13, characterized in that: For a repeatedly transmitted control channel, one or more of the following parameters of the corresponding DMRS are the same: Whether at least one of the same REs is used with the control information; Whether all REs corresponding to DMRS are used for control information at the same time; The frequency domain density of the time-frequency resources used by DMRS; The time domain density of the time-frequency resources used by DMRS; Power parameters.

15. The method according to any one of claims 1 to 14, characterized in that: The configuration information of the multiple DMRS modes is the same as one or more of the following parameters of the DMRS configuration information of the data channel: Power parameters; DMRS sequence generation method; The frequency domain density of the time-frequency resources used by DMRS; The time domain density of the time-frequency resources used by DMRS.

16. The method according to any one of claims 1 to 15, characterized in that: The method further comprises: Reporting capability information to the second device; The capability information is used to indicate one or more of the following: The first device supports receiving the indication information; The multiple DMRS modes supported by the first device; multiple control channel types supported by the first device; The first device supports non-orthogonal DMRS; And, the first device supports the first DMRS mode or the first control channel type.

17. The method according to claim 16, characterized in that The capability information is reported via one or more of the following messages: RRC signaling, and, MAC CE.

18. The method according to claim 16 or 17, characterized in that The capability information is reported for a frequency band; The capability information is reported independently according to the frequency band combination; The capability information is reported independently for each frequency band in the frequency band combination; The capability information is reported independently for each carrier on each frequency band in the frequency band combination; The capability information is reported according to the frequency band range; Alternatively, the capability information is reported for the UE.

19. The method according to any one of claims 16 to 18, characterized in that: The capability information may also include one or more of the following: Supported power parameters; The frequency domain density of the time-frequency resources used by the supported DMRS; The time domain density of the time-frequency resources used by the supported DMRS.

20. A control channel transmission method, characterized in that: The method is performed by a second device, and includes: Send indication information to the first device, wherein the indication information is used to indicate a first demodulation reference signal DMRS mode or a first control channel type, wherein the first control channel type corresponds to the first DMRS mode; the first DMRS mode is one of multiple DMRS modes; the indication information is used to instruct the first device to transmit a control channel according to the DMRS mode indicated by the indication information.

21. The method according to claim 20, characterized in that The indication information is carried by one or more of the following message / signaling combinations: Broadcast messages; System messages; Radio Resource Control (RRC) signaling; Media access control MAC control unit CE; Downlink control information DCI signaling; Downlink messages during random access; As well as dedicated signaling for artificial intelligence AI / machine learning ML.

22. The method according to claim 20 or 21, characterized in that The indication information is used to indicate the first DMRS pattern or the first control channel type corresponding to the control channel with respect to a control channel format and / or a control channel resource.

23. The method according to any one of claims 20 to 22, characterized in that: The multiple DMRS modes are all orthogonal DMRS modes; or, Among the multiple DMRS patterns, one or more DMRS patterns are non-orthogonal DMRS patterns.

24. The method according to claim 23, characterized in that The multiple DMRS modes respectively have one or more of the following parameters: The frequency domain density of the time-frequency resources used by DMRS; The time domain density of the time-frequency resources used by DMRS; The frequency domain resource location of the time-frequency resources used by DMRS; The time domain resource location of the time-frequency resources used by DMRS; DMRS sequence generation parameters; DMRS sequence generation method; Power parameters.

25. The method according to claim 24, characterized in that Among the multiple DMRS modes, values ​​of all or part of the parameters between any two DMRS modes are different.

26. The method according to any one of claims 23 to 25, characterized in that: In the case where one or more DMRS modes among the multiple DMRS modes are non-orthogonal DMRS modes, and the non-orthogonal DMRS mode has a power-related parameter, the power parameter of the non-orthogonal DMRS mode is used to indicate one or more of the following parameters on the shared resource unit RE: a ratio of the transmit power of the DMRS on the shared RE to the total transmit power on the shared RE; a ratio of the transmit power of data on the shared RE to the total transmit power on the shared RE; a ratio of the transmit power of the DMRS on the shared RE to the transmit power of the data on the shared RE; a ratio of the transmit power of data on the shared RE to the transmit power of DMRS on the shared RE; The ratio of the transmit power of DMRS on one RE to the total transmit power on the RE.

27. The method according to any one of claims 20 to 26, characterized in that: The indication information is further used to indicate the frequency domain resource density and / or frequency domain resource position of the DMRS in the first DMRS mode; Alternatively, the frequency domain resource density and / or frequency domain resource position of the DMRS in the first DMRS mode is predefined.

28. The method according to any one of claims 20 to 27, characterized in that: The indication information is further used to indicate the time domain density and / or time domain resource position of the DMRS in the first DMRS mode; Alternatively, the time domain density and / or time domain resource position of the DMRS in the first DMRS mode is predefined.

29. The method according to any one of claims 20 to 28, characterized in that: The indication information is also used to indicate a sequence generation parameter of the first DMRS pattern.

30. The method according to claim 29, characterized in that The sequence generation parameters include one or more of the following: The timeslot number where the DMRS is located; The symbol number where the DMRS is located, or the symbol number where the DMRS is located within a slot; The system frame number SFN number where the DMRS is located; The cell number where the DMRS is located, or the physical layer cell number where the DMRS is located; The carrier number where the DMRS is located; DMRS port number; A number corresponding to a data scheduling control channel; wherein feedback information of data scheduled by the data scheduling control channel is carried by the control channel; DMRS scrambling parameters; And other related parameters of network configuration.

31. The method according to any one of claims 20 to 30, characterized in that: The indication information is configured for the corresponding cell; or, The indication information configures the corresponding carrier; or, The indication information configures the corresponding bandwidth part BWP; or, The indication information is configured corresponding to a physical sidelink feedback channel PSFCH; or, The indication information configures a physical uplink control channel PUCCH resource corresponding to the physical uplink control channel PUCCH; or, The indication information is configured corresponding to the PUCCH resource group; or, The indication information is configured corresponding to the PUCCH format.

32. The method according to any one of claims 20 to 31, characterized in that The DMRS mode indicated by the indication information is not used for PUCCH format 0; Alternatively, the DMRS pattern indicated by the indication information is not used for PUCCH transmission that only feeds back ACK / NACK.

33. The method according to any one of claims 20 to 32, characterized in that: For a repeatedly transmitted control channel, one or more of the following parameters of the corresponding DMRS are the same: Whether at least one of the same REs is used with the control information; Whether all REs corresponding to DMRS are used for control information at the same time; The frequency domain density of the time-frequency resources used by DMRS; The time domain density of the time-frequency resources used by DMRS; Power parameters.

34. The method according to any one of claims 20 to 33, characterized in that: The configuration information of the multiple DMRS modes is the same as one or more of the following parameters of the DMRS configuration information of the data channel: Power parameters; DMRS sequence generation method; The frequency domain density of the time-frequency resources used by DMRS; The time domain density of the time-frequency resources used by DMRS.

35. The method according to any one of claims 20 to 34, characterized in that: The method further comprises: Receiving capability information reported by the first device; The capability information is used to indicate one or more of the following: The first device supports receiving the indication information; The multiple DMRS modes supported by the first device; multiple control channel types supported by the first device; The first device supports non-orthogonal DMRS; And, the first device supports the first DMRS mode or the first control channel type.

36. The method according to claim 35, characterized in that The capability information is reported via one or more of the following messages: RRC signaling, and, MAC CE.

37. The method according to claim 35 or 36, characterized in that The capability information is reported for a frequency band; The capability information is reported independently according to the frequency band combination; The capability information is reported independently for each frequency band in the frequency band combination; The capability information is reported independently for each carrier on each frequency band in the frequency band combination; The capability information is reported according to the frequency band range; Alternatively, the capability information is reported for the UE.

38. The method according to any one of claims 35 to 37, characterized in that: The capability information may also include one or more of the following: Supported power parameters; The frequency domain density of the time-frequency resources used by the supported DMRS; The time domain density of the time-frequency resources used by the supported DMRS.

39. A control channel transmission device, characterized in that: The device comprises: A receiving module, configured to receive indication information, wherein the indication information is used to indicate a first demodulation reference signal DMRS mode or a first control channel type, wherein the first control channel type corresponds to the first DMRS mode; and the first DMRS mode is one of multiple DMRS modes; The transmission module is used to transmit the control channel according to the DMRS mode indicated by the indication information.

40. A control channel transmission device, characterized in that: The device comprises: A sending module, used for sending indication information to a first device, wherein the indication information is used to indicate a first demodulation reference signal DMRS mode or a first control channel type, wherein the first control channel type corresponds to the first DMRS mode; the first DMRS mode is one of multiple DMRS modes; the indication information is used to instruct the first device to transmit a control channel according to the DMRS mode indicated by the indication information.

41. A communication device, characterized in that: The terminal device includes a processor, a memory and a transceiver; The memory stores a computer program, and the processor executes the computer program so that the network device implements the control channel transmission method as described in any one of claims 1 to 19 above.

42. A computer-readable storage medium, characterized in that: The storage medium stores a computer program, and the computer program is used to be executed by a processor of a communication device so that the communication device implements the control channel transmission method as described in any one of claims 1 to 38.

43. A chip, characterized in that: The chip includes an integrated circuit and firmware arranged in the integrated circuit, and the chip is used to run in a communication device so that the communication device executes the control channel transmission method according to any one of claims 1 to 38.

44. A computer program product, characterized in that The computer program product includes computer instructions, which are stored in a computer-readable storage medium; the processor of the communication device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, so that the communication device executes the control channel transmission method as described in any one of claims 1 to 38.

45. A computer program, characterized in that The computer program is executed by a processor of a communication device, so that the communication device implements the control channel transmission method according to any one of claims 1 to 38.

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