A reference signal transmission method, device and system

Abstract

The present application provides a reference signal transmission method, device and system, which can be applied to the fields of vehicle networking (e.g., V2X, LTE-V or V2V, etc.), intelligent driving and intelligent networked vehicles. A first communication device determines a first transmission parameter from at least two transmission parameters, any two of the at least two transmission parameters are different, and the first transmission parameter is used to determine a first transmission resource of a first reference signal. Different terminal devices transmit reference signals based on different transmission parameters, which can reduce conflicts between reference signals of different terminal devices and improve the accuracy of channel estimation.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a reference signal transmission method, device and system. Background Art

[0002] Vehicle to everything (V2X) communication refers to the communication between vehicles and anything in the outside world, such as communication between vehicles, vehicles and pedestrians, vehicles and infrastructure, vehicles and networks, etc. Vehicle-user equipment (V-UE) can send some of its own information, such as location, speed, intention (turning, merging or reversing, etc.) to surrounding V-UEs. At the same time, V-UEs will also receive information from surrounding V-UEs to complete communication between V-UEs, which is also called sidelink communication.

[0003] V2X communication introduces the physical sidelink control channel (PSCCH) and the physical sidelink shared channel (PSSCH), where PSCCH is used to carry sidelink control information (SCI) and SCI is used to schedule PSSCH, so that sidelink communication can be carried out between V-UEs. Reference signals, such as demodulation reference signals (DMRS), are transmitted in the physical sidelink control channel, and the reference signals can be used for channel estimation. For example, a first terminal device sends a physical sidelink control channel to a second terminal device, and the physical sidelink control channel carries sidelink control information and a reference signal. The second terminal device measures the reference signal and uses the measurement result for channel estimation of the physical sidelink control channel, that is, the channel quality and other parameters of the physical sidelink control channel are evaluated based on the measurement result. Then, the second terminal device receives the physical sidelink control information carried in the physical sidelink control channel based on the channel estimation of the physical sidelink control channel.

[0004] In actual scenarios, reference signals between multiple terminal devices may be transmitted using the same resources, and the multiple reference signals may conflict or affect each other, causing inaccurate channel estimation when the terminal device receives the reference signals for channel estimation. Summary of the invention

[0005] The present application provides a reference signal transmission method, device and system, which can improve the accuracy of channel estimation.

[0006] In a first aspect, the present application provides a reference signal transmission method, comprising: a first communication device determines a first transmission parameter from at least two transmission parameters, any two of the at least two transmission parameters are different, and the first transmission parameter is used to determine a first transmission resource of a first reference signal; the first communication device sends the first reference signal to a second communication device on the first transmission resource. The first communication device may be a first terminal device.

[0007] Through the embodiments of the present application, different terminal devices determine a first transmission parameter from at least two transmission parameters, and if any two of the at least two transmission parameters are different, different terminal devices transmit reference signals based on different transmission parameters, which can reduce conflicts between reference signals of different terminal devices and improve the accuracy of channel estimation.

[0008] In one possible design, the first communication device determines the first transmission parameter from at least two transmission parameters, including: the first communication device determines the first transmission parameter from the at least two transmission parameters based on the identification information of the first communication device and the correspondence between the identification information of at least two communication devices and the at least two transmission parameters.

[0009] In a possible design, the at least two transmission parameters and the corresponding relationship between the identification information of the at least two communication devices and the at least two transmission parameters are predefined by the protocol; or the first communication device receives first configuration information from the first network device, the first configuration information indicates the at least two transmission parameters and the corresponding relationship between the identification information of the at least two communication devices and the at least two transmission parameters; or the first communication device receives second configuration information from the third communication device, the second configuration information indicates the at least two transmission parameters and the corresponding relationship between the identification information of the communication device and the transmission parameters; or the corresponding relationship between the identification information of the at least two communication devices and the at least two transmission parameters is predefined by the protocol, the first communication device receives third configuration information from the first network device, the third configuration information indicates the at least two transmission parameters; or the corresponding relationship between the identification information of the at least two communication devices and the at least two transmission parameters is predefined by the protocol, the first communication device receives fourth configuration information from the third communication device, the second configuration information indicates the at least two transmission parameters. In this way, the flexibility of transmission parameter configuration can be improved.

[0010] In one possible design, the identifier of the first communication device includes M bits, the identifier information of the first communication device includes N bits of the identifier of the first communication device, the N bits belong to the M bits, and both M and N are positive integers. The identification information of the first communication device is used to determine the transmission parameters for reference signal transmission, thereby reducing the complexity of system design.

[0011] In one possible design, the first communication device sends first sideline control information to the second communication device on a second transmission resource other than the first transmission resource, and the second transmission resource includes the first transmission resource.

[0012] In a possible design, the first side control information includes (MN) bits of the identifier of the first communication device other than the N bits, thereby saving resource overhead of control information.

[0013] In one possible design, the first sidelink control information is carried on a first sidelink control channel, and the first reference signal is used for channel estimation of the first sidelink control channel.

[0014] In one possible design, the first transmission parameter is used to determine a first transmission resource of a first reference signal, including: the first transmission parameter is used to determine a transmission pattern of the first reference signal, and the transmission pattern is used to determine the first transmission resource.

[0015] In one possible design, the first transmission parameter includes a resource offset, and the resource offset is used to determine a starting position of a transmission resource of the first reference signal or the transmission pattern.

[0016] In one possible design, the first transmission resource includes at least two sub-resources, each of the at least two sub-resources is used to transmit the first reference signal, and the at least two sub-resources are frequency-division multiplexed. Optionally, the at least two sub-resources may also be time-division multiplexed.

[0017] In a second aspect, a reference signal transmission method is provided, comprising: a first network device determines first configuration information, the first configuration information is used to indicate at least two transmission parameters and a correspondence between identification information of at least two communication devices and the at least two transmission parameters, any two of the at least two transmission parameters are different, the at least two transmission parameters and the correspondence between the identification information of at least two communication devices and the at least two transmission parameters are used to determine a first transmission parameter, the first transmission parameter is used to determine a first transmission resource of a first reference signal; the first network device sends the first configuration information to the first communication device. The first network device may be replaced by a third terminal device.

[0018] Through the embodiments of the present application, different terminal devices determine a first transmission parameter from at least two transmission parameters, and if any two of the at least two transmission parameters are different, different terminal devices transmit reference signals based on different transmission parameters, which can reduce conflicts between reference signals of different terminal devices and improve the accuracy of channel estimation.

[0019] In a possible design, the correspondence between the identification information of the at least two communication devices and the at least two transmission parameters is predefined by a protocol, and the first communication device receives third configuration information from the first network device, and the third configuration information indicates the at least two transmission parameters; or the correspondence between the identification information of the at least two communication devices and the at least two transmission parameters is predefined by a protocol, and the first communication device receives fourth configuration information from a third communication device, and the second configuration information indicates the at least two transmission parameters. Thus, the flexibility of transmission parameter configuration can be improved.

[0020] In one possible design, the identification of one of the at least two communication devices includes M bits, the identification information of one of the at least two communication devices includes N bits of the identification of one of the at least two communication devices, the N bits belong to the M bits, and both M and N are positive integers. The transmission parameters for reference signal transmission are determined using the identification information of the first communication device, which reduces the complexity of system design.

[0021] In one possible design, the first configuration information is also used to indicate a second transmission resource, resources on the second transmission resource other than the first transmission resource are used to transmit first sideline control information, and the second transmission resource includes the first transmission resource.

[0022] In a possible design, the first side control information includes (MN) bits of an identifier of one of the at least two communication devices except the N bits. Thus, the amount of control information can be saved.

[0023] In one possible design, the first sidelink control information is carried on a first sidelink control channel, and the first reference signal is used for channel estimation of the first sidelink control channel.

[0024] In one possible design, the first transmission parameter is used to determine a first transmission resource of a first reference signal, including: the first transmission parameter is used to determine a transmission pattern of the first reference signal, and the transmission pattern is used to determine the first transmission resource.

[0025] In one possible design, the first transmission parameter includes a resource offset, and the resource offset is used to determine a starting position of a transmission resource of the first reference signal or the transmission pattern.

[0026] In one possible design, the first transmission resource includes at least two sub-resources, each of the at least two sub-resources is used to transmit the first reference signal, and the at least two sub-resources are frequency-division multiplexed. Optionally, the at least two sub-resources may also be time-division multiplexed.

[0027] In a third aspect, a first communication device is provided, comprising: a processing unit, configured to determine a first transmission parameter from at least two transmission parameters, any two of the at least two transmission parameters are different, and the first transmission parameter is used to determine a first transmission resource of a first reference signal; and a transceiver unit, configured to send the first reference signal to a second communication device on the first transmission resource. The first communication device may be a first terminal device.

[0028] Through the embodiments of the present application, different terminal devices determine a first transmission parameter from at least two transmission parameters, and if any two of the at least two transmission parameters are different, different terminal devices transmit reference signals based on different transmission parameters, which can reduce conflicts between reference signals of different terminal devices and improve the accuracy of channel estimation.

[0029] In one possible design, the processing unit, used to determine the first transmission parameter from at least two transmission parameters, includes: the processing unit, used to determine the first transmission parameter from the at least two transmission parameters based on the identification information of the first communication device and the correspondence between the identification information of at least two communication devices and the at least two transmission parameters.

[0030] In a possible design, the at least two transmission parameters and the corresponding relationship between the identification information of the at least two communication devices and the at least two transmission parameters are predefined by the protocol; or the transceiver unit is further used to receive first configuration information from the first network device, the first configuration information indicating the at least two transmission parameters and the corresponding relationship between the identification information of the at least two communication devices and the at least two transmission parameters; or the transceiver unit is further used to receive second configuration information from a third communication device, the second configuration information indicating the at least two transmission parameters and the corresponding relationship between the identification information of the communication device and the transmission parameters; or the corresponding relationship between the identification information of the at least two communication devices and the at least two transmission parameters is predefined by the protocol, and the first communication device receives third configuration information from the first network device, the third configuration information indicating the at least two transmission parameters; or the corresponding relationship between the identification information of the at least two communication devices and the at least two transmission parameters is predefined by the protocol, and the first communication device receives fourth configuration information from the third communication device, the second configuration information indicating the at least two transmission parameters. Thus, the flexibility of transmission parameter configuration can be improved.

[0031] In one possible design, the identifier of the first communication device includes M bits, the identifier information of the first communication device includes N bits of the identifier of the first communication device, the N bits belong to the M bits, and both M and N are positive integers. The identification information of the first communication device is used to determine the transmission parameters for reference signal transmission, thereby reducing the complexity of system design.

[0032] In one possible design, the transceiver unit is further used to send first side control information to the second communication device on a second transmission resource other than the first transmission resource, and the second transmission resource includes the first transmission resource.

[0033] In a possible design, the first side control information includes (MN) bits of the identifier of the first communication device other than the N bits, thereby saving the amount of control information.

[0034] In one possible design, the first sidelink control information is carried on a first sidelink control channel, and the first reference signal is used for channel estimation of the first sidelink control channel.

[0035] In one possible design, the first transmission parameter is used to determine a first transmission resource of a first reference signal, including: the first transmission parameter is used to determine a transmission pattern of the first reference signal, and the transmission pattern is used to determine the first transmission resource.

[0036] In one possible design, the first transmission parameter includes a resource offset, and the resource offset is used to determine a starting position of a transmission resource of the first reference signal or the transmission pattern.

[0037] In one possible design, the first transmission resource includes at least two sub-resources, each of the at least two sub-resources is used to transmit the first reference signal, and the at least two sub-resources are frequency-division multiplexed. Optionally, the at least two sub-resources may also be time-division multiplexed.

[0038] In a fourth aspect, a first network device is provided, characterized in that it includes: a processing unit, configured to determine first configuration information, wherein the first configuration information is used to indicate at least two transmission parameters and a correspondence between identification information of at least two communication devices and the at least two transmission parameters, any two of the at least two transmission parameters are different, and the at least two transmission parameters and the correspondence between the identification information of at least two communication devices and the at least two transmission parameters are used to determine a first transmission parameter, wherein the first transmission parameter is used to determine a first transmission resource of a first reference signal; and a transceiver unit, configured to send the first configuration information to the first communication device. The first network device may be replaced by a third terminal device.

[0039] Through the embodiments of the present application, different terminal devices determine a first transmission parameter from at least two transmission parameters, and if any two of the at least two transmission parameters are different, different terminal devices transmit reference signals based on different transmission parameters, which can reduce conflicts between reference signals of different terminal devices and improve the accuracy of channel estimation.

[0040] In a possible design, the correspondence between the identification information of the at least two communication devices and the at least two transmission parameters is predefined by a protocol, and the first communication device receives third configuration information from the first network device, and the third configuration information indicates the at least two transmission parameters; or the correspondence between the identification information of the at least two communication devices and the at least two transmission parameters is predefined by a protocol, and the first communication device receives fourth configuration information from a third communication device, and the second configuration information indicates the at least two transmission parameters. Thus, the flexibility of transmission parameter configuration can be improved.

[0041] In one possible design, the identification of one of the at least two communication devices includes M bits, the identification information of one of the at least two communication devices includes N bits of the identification of one of the at least two communication devices, the N bits belong to the M bits, and both M and N are positive integers. The transmission parameters for reference signal transmission are determined using the identification information of the first communication device, which reduces the complexity of system design.

[0042] In one possible design, the first configuration information is also used to indicate a second transmission resource, resources on the second transmission resource other than the first transmission resource are used to transmit first sideline control information, and the second transmission resource includes the first transmission resource.

[0043] In a possible design, the first side control information includes (MN) bits of an identifier of one of the at least two communication devices except the N bits. Thus, the amount of control information can be saved.

[0044] In one possible design, the first sidelink control information is carried on a first sidelink control channel, and the first reference signal is used for channel estimation of the first sidelink control channel.

[0045] In one possible design, the first transmission parameter is used to determine a first transmission resource of a first reference signal, including: the first transmission parameter is used to determine a transmission pattern of the first reference signal, and the transmission pattern is used to determine the first transmission resource.

[0046] In one possible design, the first transmission parameter includes a resource offset, and the resource offset is used to determine a starting position of a transmission resource of the first reference signal or the transmission pattern.

[0047] In one possible design, the first transmission resource includes at least two sub-resources, each of the at least two sub-resources is used to transmit the first reference signal, and the at least two sub-resources are frequency-division multiplexed. Optionally, the at least two sub-resources may also be time-division multiplexed.

[0048] In a fifth aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores a computer program, and when the computer program is run on a computer, the computer is enabled to execute the method involved in any of the above aspects.

[0049] In a sixth aspect, a communication device is provided, the communication device comprising: at least one processor, the at least one processor is coupled to a memory, the memory may be built into the communication device or may be disposed outside the communication device, the at least one processor is used to call and execute the instructions from the memory, so that the communication device implements the method as described in any one of the above aspects. The communication device may be a chip.

[0050] In the seventh aspect, a chip is provided, comprising at least one processor, wherein the at least one processor is coupled to a memory, and the memory may be built into the chip or disposed outside the chip, and the at least one processor is used to call and execute the instructions from the memory so that the chip implements the method described in any of the above aspects.

[0051] According to an eighth aspect, a computer program product is provided, the computer program product comprising a computer program, and when the computer program is run on a computer, the computer is enabled to execute the method as described in any one of the above aspects.

[0052] In a ninth aspect, a communication device is provided, comprising at least one processor and an interface circuit, wherein the interface circuit is used to receive computer codes or instructions and transmit them to the processor, and the processor is used to run the computer codes or instructions to execute the method described in any one of the above aspects.

[0053] In a tenth aspect, a system is provided, comprising the device as described in the third aspect and the device as described in the fourth aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 It is a schematic diagram of the V2X communication scenario.

[0055] Figure 2 Schematic diagram of side communication provided for this application.

[0056] Figure 3 This is a schematic diagram of the structure of the first terminal device provided in this application.

[0057] Figure 4 This is a schematic diagram of the structure of the second terminal device provided in this application.

[0058] Figure 5 This is a schematic diagram of the structure of the third terminal device provided in this application.

[0059] Figure 6 This is a schematic diagram of the structure of the first network device provided in this application.

[0060] Figure 7 It is a schematic diagram of the reference signal transmission method provided in this application.

[0061] Figure 8 This is a schematic diagram of reference signal transmission resources provided in this application.

[0062] Fig. 9 This is a schematic diagram of the side control information, reference signal and side data transmission resources provided by this application. DETAILED DESCRIPTION

[0063] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0064] The technical solution of the present application can be applied to any terminal device and terminal device (D2D) direct communication network such as vehicle-to-everything (V2X), V2V, V2I, V2P, V2N, intelligent connected vehicle (ICV), autonomous driving or assisted driving, and other communication systems, as well as user equipment cooperation (UC) or sidelink relay. In addition, it is applicable to communication scenarios with and without network coverage.

[0065] Figure 1 It is a schematic diagram of the V2X communication scenario. In V2X communication, the link between vehicle-user equipment (V-UE) and vehicle-user equipment, pedestrian-user equipment and vehicle-user equipment, and roadside unit (RSU) equipment is called sidelink (SL), and the link between vehicle-user equipment and network equipment is called downlink (DL) or uplink (UL), and its air interface is also called Uu air interface, and the corresponding DL communication and UL communication are also called Uu communication.

[0066] The terminal equipment mentioned in this application may also be referred to as a terminal device, including but not limited to user equipment (UE), wireless terminal equipment, mobile terminal equipment, device-to-device (D2D) terminal equipment, V2X terminal equipment, machine-type communications (M2M / MTC) terminal equipment, Internet of Things (IoT) terminal equipment, user terminal, user agent, or user equipment, etc. For example, it may include a mobile phone (or "cellular" phone), a computer with a mobile terminal device, such as a portable, pocket-sized, handheld, or computer-built-in mobile device, etc. Another example is a personal communication service (PCS) phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), and other devices. In addition, the terminal device may also be a vehicle-mounted communication module or other embedded communication module. The vehicle-mounted communication module may also be referred to as a vehicle-mounted terminal device or an on-board unit (OBU). The terminal device of the embodiment of the present application may also be an on-board module, an on-board module, an on-board component, an on-board chip or an on-board unit built into the vehicle as one or more components or units. The vehicle may implement the method of the present application through the built-in on-board module, on-board module, on-board component, on-board chip or on-board unit.

[0067] The network devices mentioned in the present application, for example, include access network (AN) devices, such as base stations (e.g., access points), which may refer to devices in the access network that communicate with wireless terminal devices through one or more cells at the air interface, or, for example, a network device in a vehicle-to-everything (V2X) technology is a road side unit (RSU). The base station can be used to convert received air frames to and from IP packets, as a router between the terminal device and the rest of the access network, where the rest of the access network may include an IP network. The RSU can be a fixed infrastructure entity that supports V2X applications and can exchange messages with other entities that support V2X applications. The network device can also coordinate the attribute management of the air interface. For example, the network device may include an evolved base station (NodeB or eNB or e-NodeB, evolutionary Node B) in a long term evolution (LTE) system or an advanced long term evolution (LTE-A), or may also include the fifth generation mobile communication technology (the 5 th The next generation node B (gNB) in the new radio (NR) system (also referred to as the NR system) of the 5G generation) may also include a centralized unit (CU) and a distributed unit (DU) in the cloud access network (CloudRAN) system, but the embodiments of the present application are not limited thereto.

[0068] Of course, network equipment can also include core network equipment, but because the technical solution provided in the embodiment of the present application mainly involves access network equipment, in the following text, unless otherwise specified, the "core network equipment" described refers to the core network equipment, and the "network equipment" or "access network equipment" described refers to the access network equipment.

[0069] Some terms involved in this application are defined below.

[0070] Transmission parameters: The transmission parameters in the embodiments of the present application can be used to determine the transmission resources of the reference signal, which can be frequency domain resources and / or time domain resources. Preferably, the transmission parameters are used to determine the transmission frequency domain resources of the reference signal. At this time, the transmission time domain resources of the reference signal will occupy the entire time domain range of the control channel. Furthermore, the transmission parameters can also be used to determine other parameters related to the transmission of the reference signal, such as the transmission period of the reference signal.

[0071] Reference signal: The reference signal in the embodiment of the present application includes a demodulation reference signal DMRS, a cell-specific reference signal (CRS) and / or a channel state information reference signal (Channel-State Information-Reference Signal, CSI-RS). Among them, the demodulation reference signal is used for demodulation of side control information or side data.

[0072] Identification information: The identification information of the embodiment of the present application may be the identification of the communication device or the identification of the terminal device itself, or may be a part of the identification of the communication device or the identification of the terminal device. If the identification of the communication device or the identification of the terminal device is an M-bit identification, then the identification information may be the M-bit identification itself, or may be N bits of the M bits, and the N bits may be the lowest N bits, the highest N bits, or any N bits. For example, if the identification of the communication device or the identification of the terminal device is a 5-bit (10101) identification, then the identification information of the communication device or the terminal device may be the lowest 2 bits (01) of the 5 bits.

[0073] Transmission pattern: The transmission pattern of the embodiment of the present application may be a graphical example of resources to determine the specific resources for reference signal transmission. The transmission pattern may include n bits of indication information to indicate whether the n resource units corresponding to the n bits of information bits are used to transmit reference signals. For a certain bit, "1" indicates the transmission of the reference signal and "0" indicates that no reference signal is transmitted. For example, the transmission pattern is 5 bits of indication information (10100), and this 5-bit transmission pattern is used to determine whether 5 resource units (e.g., resource blocks (RB) or resource elements (RE)) in the frequency domain are used to transmit reference signals. The transmission pattern (10100) indicates that the first and third resource units are used to transmit reference signals, and the second, fourth and fifth resource units are not used to transmit reference signals.

[0074] Figure 2A method for transmitting a reference signal is provided for an embodiment of the present application. A first communication device sends side control information to a second communication device on a first resource on a physical side control channel, and a part of the first resource is used for the first communication device to send a reference signal to the second communication device. The second communication device measures the reference signal, i.e., performs channel estimation, thereby determining the channel state of the side control channel. The second communication device demodulates the received side control information according to the result of the channel estimation (the measurement result of the reference signal). The side control information includes parameters such as the resource, modulation and coding scheme (MCS) and other parameters for sending side data by the first communication device. After receiving the side control information, the second communication device decodes the side control information, thereby obtaining the transmission resource, modulation and coding strategy and other parameters of the side data, and receives the side data on the physical side data channel according to the transmission resource, modulation and coding strategy and other parameters of the side data indicated by the side control information. The first communication device in the embodiment of the present application may be a first terminal device, and the second communication device may be a second terminal device.

[0075] The following describes the embodiments of the present application in more detail by taking the first to third terminal devices and the network device as examples.

[0076] Figure 7 The present invention provides a reference signal transmission method, first to third terminal devices, network devices and systems. Figure 3 As shown, the first terminal device includes a processing unit 31 and a transceiver unit 32, wherein the transceiver unit 32 can be replaced by a sending unit or a receiving unit. Figure 4 As shown, the second terminal device includes a processing unit 41 and a transceiver unit 42, wherein the transceiver unit 42 can be replaced by a sending unit or a receiving unit. Figure 5 As shown, the third terminal device includes a processing unit 51 and a transceiver unit 52, wherein the transceiver unit 52 can be replaced by a sending unit or a receiving unit. Figure 6 As shown, the first network device includes a processing unit 61 and a transceiver unit 62, and the transceiver unit 62 can be replaced by a sending unit or a receiving unit.

[0077] The first to third terminal devices may be vehicle-mounted modules, vehicle-mounted modules or user equipment, and the first network device may be a base station. The processing unit 31, the processing unit 41, the processing unit 51 and the processing unit 61 may be processors, the transceiver unit 31, the transceiver unit 41, the transceiver unit 51 and the transceiver unit 61 may be transceivers, the transceiver unit 31, the transceiver unit 41, the transceiver unit 51 and the transceiver unit 61 may be receivers when performing the receiving step, and the transceiver unit 31, the transceiver unit 41, the transceiver unit 51 and the transceiver unit 61 may be transmitters when performing the sending step. This transceiver, transmitter or receiver may be a radio frequency circuit or a radio frequency front end. When the first to second terminal devices or network devices include a storage unit, the storage unit is used to store computer instructions, the processor is communicatively connected to the memory, and the processor executes the computer instructions stored in the memory, so that the first to second terminal devices or network devices execute Figure 7 The method involved in the embodiment: The processor may be a general-purpose central processing unit (CPU), a microprocessor, or an application specific integrated circuit (ASIC).

[0078] When the first to third terminal devices or the first network device is a chip, the processing unit 31, the processing unit 41, the processing unit 51 and the processing unit 61 may be a processor, and the transceiver unit 31, the transceiver unit 41, the transceiver unit 51 and the transceiver unit 61 may be an input interface or an output interface, a pin or a circuit, etc. The processing unit may execute a program or instruction stored in a storage unit or a memory, so that the chip in the first to second terminal devices or the network device executes Figure 7 Optionally, the storage unit or memory is a storage unit in the chip, such as a register, a cache, etc. The storage unit or memory may also be a storage unit in the terminal located outside the chip, such as a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM), etc.

[0079] It should be noted that the first terminal device mentioned below may be a transmitting device in sideline communication, or a circuit system installed in the transmitting device, such as a chip or an integrated circuit. The second terminal device may be a receiving device in sideline communication, or a circuit system installed in the receiving device, such as a chip or an integrated circuit. The terminal device in this application may be a communication device.

[0080] Optionally, the chip mentioned here may be, for example, a system on chip (SoC), a baseband chip, etc.

[0081] Figure 7 The steps of the reference signal transmission method involved in the embodiment include:

[0082] Step 71, the processing unit 31 of the first terminal device determines a first transmission parameter from at least two transmission parameters, any two of the at least two transmission parameters are different, and the first transmission parameter is used to determine a first transmission resource of a first reference signal. The first transmission parameter belongs to the at least two transmission parameters, and any one of the at least two transmission parameters is different from another of the at least two transmission parameters. Preferably, the first reference signal is a demodulation reference signal, which is used for channel estimation of a side control channel.

[0083] Any one of the at least two transmission parameters includes a resource offset, and the resource offset is used to determine the starting position of the transmission resource of the reference signal transmitted according to the any one of the transmission parameters within the resource cluster or the transmission pattern, and this starting position or transmission pattern can be used to determine the transmission resource of the reference signal within the resource cluster. For example, the first transmission parameter is a transmission parameter determined by the first terminal device from the at least two transmission parameters, then the first transmission parameter includes a resource offset, and the resource offset is used to determine the starting position of the transmission resource of the first reference signal within the resource cluster or the transmission pattern. A resource cluster is a collection of resource units, and a resource cluster can be predefined by a protocol or configured by a network device.

[0084] There are two specific ways for the processing unit 31 of the first terminal device to determine the first transmission parameter from at least two transmission parameters: In one way, the processing unit 31 of the first communication device can determine the first transmission parameter from the at least two transmission parameters based on the identification information of the first terminal device and the correspondence between the identification information of at least two terminal devices and the at least two transmission parameters; In two way, the processing unit 31 of the first communication device can also randomly select or freely select the first transmission parameter from the at least two transmission parameters.

[0085] The correspondence between the identification information of at least two terminal devices and the at least two transmission parameters in the first mode can be referred to as the correspondence between the identification information of the terminal device and the transmission parameters. This correspondence is preferably a correspondence between the identification information of the terminal device and the transmission parameter. For example, it can be a one-to-one correspondence or a many-to-one correspondence, that is, for the first terminal device, it can determine a transmission parameter from the above correspondence according to the identification information of the first terminal device. For example, as shown in Table 1, there are 4 transmission parameters 1-4, and the identification information 00 of the terminal device corresponds to the transmission parameter 1, the identification information 01 of the terminal device corresponds to the transmission parameter 2, the identification information 10 of the terminal device corresponds to the transmission parameter 3, and the identification information 11 of the terminal device corresponds to the transmission parameter 4. Of course, Table 1 shows a one-to-one correspondence. If it is a many-to-one correspondence, the identification information 00 and 01 can correspond to the transmission parameter 1, and the identification information 10 and 11 can correspond to the transmission parameter 2.

[0086] Table 1

[0087]

[0088]

[0089] The identification of the first terminal device includes M bits, and the identification information of the first terminal device includes N bits of the identification of the first terminal device, the N bits belong to the M bits, and both M and N are positive integers. For example, the identification of the first terminal device of M (6) bits is 101101, and the identification information of the first terminal device can be, for example, specified by the protocol or configured as the lowest N (2) bits by the network device or the third terminal device. At this time, the identification information of the first terminal device is 01, and the processing unit 31 of the first terminal device will determine the transmission parameter 2 as the transmission parameter of the first reference signal sent by the first terminal device, that is, the first transmission parameter, by looking up Table 1 (i.e., looking up the corresponding relationship of Table 1) according to the representation information 01 of the first terminal device. The identification of the terminal device can be a physical layer identification or a high-level identification, for example, a Cell Radio Network Temporary Identifier (C-RNTI). The identification information of the terminal device can be a part of the physical layer identification or a part of the high-level identification, for example, a part of the C-RNTI.

[0090] The identification information of the terminal device in Table 1 is not the identification information of a specific terminal device, and it is necessary for a certain terminal device to search for the corresponding transmission parameters according to the identification information of its own terminal device through the corresponding relationship in Table 1. The identification information of the terminal device in Table 1 only gives a 2-bit example, and the number of bits contained in the identification information of the specific terminal device and which bits of the M bits are used as the identification information of the N bits, that is, the value of N and whether N is the lowest N bits, the highest N bits, or the middle N bits, can be predefined by the protocol or configured by the network device or the third terminal device.

[0091] The correspondence between the at least two transmission parameters and / or the identification information of at least two terminal devices in the above-mentioned method 1 and the at least two transmission parameters may be predefined or preset by the protocol, and the at least two transmission parameters in the method 2 may be predefined or preset by the protocol. That is, the processing unit 31 of the first terminal device determines the first transmission parameter corresponding to the first terminal device according to the correspondence between the at least two transmission parameters and / or the identification information of at least two terminal devices predefined or preset by the protocol and the at least two transmission parameters. The first transmission parameter belongs to the at least two transmission parameters.

[0092] Optionally, in mode 1, the correspondence between the identification information of the at least two communication devices and the at least two transmission parameters is predefined by a protocol, and the first communication device receives third configuration information from the first network device, and the third configuration information indicates the at least two transmission parameters; or the correspondence between the identification information of the at least two communication devices and the at least two transmission parameters is predefined by a protocol, and the first communication device receives fourth configuration information from a third communication device, and the second configuration information indicates the at least two transmission parameters. That is, the correspondence between the identification information of the at least two communication devices and the at least two transmission parameters is predefined by a protocol, and the at least two transmission parameters are configured to the first terminal device by the first network device or the third terminal device.

[0093] The correspondence between the at least two transmission parameters and / or the identification information of the at least two terminal devices in the above-mentioned manner 1 and the at least two transmission parameters may also be configured by the first network device or the third terminal device, and the at least two transmission parameters in the above-mentioned manner 2 may also be configured by the first network device or the third terminal device. The above-mentioned configuration step may specifically include step 701 and step 702 before step 71. Figure 7 Herein, only the configuration of the first configuration information by the first network device is used as an example for explanation. Figure 7 The first network device in the example may be replaced by a third terminal device.

[0094] Step 701: The processing unit 61 of the first network device determines first configuration information. In the first mode, the first configuration information is used to indicate the correspondence between at least two transmission parameters and / or identification information of at least two communication devices and the at least two transmission parameters, any two of the at least two transmission parameters are different, and the at least two transmission parameters and the correspondence between the identification information of at least two communication devices and the at least two transmission parameters are used to determine the first transmission parameter, and the first transmission parameter is used to determine the first transmission resource of the first reference signal. In the second mode, the first configuration information is used to indicate at least two transmission parameters.

[0095] In step 702, the transceiver unit 62 of the first network device sends the first configuration information to the first terminal device, and the transceiver unit 32 of the first terminal device receives the first configuration information from the first network device. Through steps 701 and 702, the network device or the third terminal device can configure the transmission parameters of the reference signal more flexibly, improve the flexibility of the reference signal transmission, and dynamically or semi-statically schedule the resources for transmitting the reference signal of different terminal devices by the network device or the third terminal device to avoid conflicts and improve the accuracy of channel estimation.

[0096] In step 72, the transceiver unit 32 of the first terminal device sends a first reference signal to the second terminal device on the first transmission resource, and the transceiver unit 42 of the second terminal device receives the first reference signal from the first terminal device on the first transmission resource. The transceiver unit 32 of the first terminal device also sends the first side control information to the second terminal device when sending the first reference signal.

[0097] In the example of Table 1, at least two transmission parameters are four transmission parameters, namely, transmission parameter 1, transmission parameter 2, transmission parameter 3 and transmission parameter 4. The transmission parameters include a resource offset, and the resource offset may be the difference between the starting transmission resource unit of the reference signal in the resource cluster and the resource unit with the lowest sequence number in the resource cluster. For example, transmission parameter 1 indicates that the resource offset is 0 resource units, transmission parameter 2 indicates that the resource offset is 1 resource unit, transmission parameter 3 indicates that the resource offset is 2 resource units, and transmission parameter 4 indicates that the resource offset is 3 resource units. A resource cluster is a collection of resource units, and a resource unit may be a frequency domain resource unit of any granularity, for example, a resource unit may be a resource element (RE), or a resource unit may also be a resource block (RB), and a resource unit may also be a time domain resource unit of any granularity. A resource cluster is a collection of resource units, for example, a resource unit may be a symbol and a resource cluster may be a time slot, etc.

[0098] exist Figure 8In the example, the side control channel occupies a resource cluster, and the resource units 0 to 11 contained in the resource cluster, a total of 12 resource units, are used for the transmission of the side control channel, and the side control channel carries the side control information and the reference signal. The resource cluster consisting of resource units 0 to 11 is selected by the first terminal device itself in the resource pool, or the resource cluster consisting of resource units 0 to 11 is selected by the first network device for the first terminal device in the resource pool and indicated to the first terminal device, and the resource pool may be a resource pool predefined by the protocol. The offset 0 indicated by transmission parameter 1 indicates that the difference between the starting transmission resource 0 of the reference signal and the lowest-numbered resource unit in the resource cluster, namely, transmission resource 0, is 0, that is, the two are the same resource 0; the offset 1 indicated by transmission parameter 2 indicates that the difference between the starting transmission resource 1 of the reference signal and the lowest-numbered resource unit in the resource cluster, namely, transmission resource 0, is 1, that is, the two are adjacent resource units; the offset 2 indicated by transmission parameter 3 indicates that the difference between the starting transmission resource 2 of the reference signal and the lowest-numbered resource unit in the resource cluster, namely, transmission resource 0, is 2, that is, the two differ by two resource units; the offset 3 indicated by transmission parameter 4 indicates that the difference between the starting transmission resource 3 of the reference signal and the lowest-numbered resource unit in the resource cluster, namely, transmission resource 0, is 3, that is, the two differ by three resource units. Optionally, the offset indicated by the transmission parameter may also indicate the difference between the starting transmission resource unit of the reference signal in the resource cluster and the lowest-numbered resource unit in the resource cluster. Figure 8 After the starting transmission resource of the reference signal is determined, the remaining resource units for transmitting the reference signal can be determined according to the interval between the reference signal transmission resource units. This interval can be predefined by the protocol, or can be configured by the first network device or the third terminal device and indicated to the first terminal device. The transmission parameter (i.e., resource offset) is used to determine the starting position of the transmission resource of the first reference signal in the resource cluster or the transmission pattern. Figure 8As shown, the interval between different reference signal transmission resources is 4 resource units. When the first terminal device determines the transmission parameter 2, i.e., the offset 1, as the transmission parameter of the reference signal, the first terminal device will determine that the resources for transmitting the first reference signal are resource unit 1, resource unit 5, and resource unit 9. Then, the starting position of the first reference signal transmission resource is resource unit 1, and the transmission pattern of the first reference signal transmission resource is the pattern composed of resource unit 1, resource unit 5, and resource unit 9. Optionally, the first transmission resource includes at least two sub-resources, each of the at least two sub-resources is used to transmit the first reference signal, and the at least two sub-resources are frequency division multiplexed. For example, the first transmission resource includes resource unit 1, resource unit 5, and resource unit 9, and resource unit 1, resource unit 5, and resource unit 9 are all used by the first terminal device to transmit the first reference signal to the second terminal device. The side control channel may also include multiple resource clusters, and there is no limit on the number of resource clusters included in the control channel.

[0099] The first terminal device determines transmission parameter 2 from the four transmission parameters as the first transmission parameter according to step 71, that is, as the transmission parameter based on which the first terminal device sends the first reference signal. If there is another terminal device that determines transmission parameter 3 as the transmission parameter based on which the reference signal is sent, the first terminal device and this terminal device use different resources to send the reference signal, thereby avoiding conflicts. When the number of terminal devices exceeds the number of at least two transmission parameters, although at least two terminal devices use the same transmission parameters, that is, the same resources, to send reference signals, for terminal devices using the same transmission parameters, the reference signal will cause certain conflicts, but from the perspective of all terminal devices or from the perspective of the system, the conflict of transmission resources of the reference signal is reduced compared to the conflict of transmission resources of the reference signal when all terminal devices use the same transmission parameters (transmission resources) to send reference signals, thereby improving the accuracy of channel estimation relying on the reference signal.

[0100] The transceiver unit 32 of the first terminal device sends the first side control information to the second terminal device on the second transmission resource except the first transmission resource, and the transceiver unit 42 of the second terminal device receives the first side control information from the second terminal device on the second transmission resource except the first transmission resource, and the second transmission resource includes the first transmission resource.

[0101] The first side control information sent by the first terminal device to the second terminal device includes (MN) bits in the identification of the first communication device except the N bits. The second terminal device will perform blind detection on the first reference signal sent by the first terminal device, and determine the N bits included in the identification information of the first terminal device according to the correspondence between the identification information of the at least two communication devices and the at least two transmission parameters. The second terminal device will determine the identification of the first terminal device, that is, the M-bit information, based on the (MN) bits of information included in the first side control information and the N-bit information.

[0102] Step 73: The transceiver unit 32 of the first terminal device sends the first sideline data to the second terminal device according to the first sideline control information, and the transceiver unit 42 of the second terminal device receives the first sideline data from the first terminal device according to the first sideline control information.

[0103] The specific resource mapping of the first sidelink control information, the first sidelink data, and the first reference signal sent by the first terminal device to the second terminal device is as follows: Fig. 9 As shown, at this time, the resource unit is a resource element RE, and the resource cluster is a resource block RB, which includes 12 resource elements RE. The resource block is predefined by the protocol, and the sideline control information includes one or more resource blocks, preferably 2 resource blocks. The sideline data and the reference signal of the sideline data are transmitted on the third transmission resource on the physical sideline data channel, the sideline control information is transmitted on the second transmission resource on the physical sideline control channel, and the reference signal of the sideline control information is transmitted on the first transmission resource. The third transmission resource and the second transmission resource are both frequency division multiplexed and time division multiplexed, that is, a part of the third transmission resource and the second transmission resource are frequency division multiplexed, and the other part of the third transmission resource and the second transmission resource are time division multiplexed. Of course, the third transmission resource for transmitting the sideline data and the second transmission resource for transmitting the sideline control information can also be frequency division multiplexed or time division multiplexed. The transmission resource of the reference signal is embedded in the transmission resource of the sideline control information, the second transmission resource may include at least one resource block RB, the resource block includes at least one resource element RE, and the difference between the first resource element transmitting the first reference signal in the resource block and the first resource element included in the second transmission resource constitutes the offset or transmission parameter in this application. The transmission resource of the reference signal will be evenly distributed in the transmission resource of the sideline control information, so as to more accurately perform channel estimation on the sideline control channel where the sideline control information is located based on the first reference signal.

[0104] Through the embodiments of the present application, different terminal devices determine a first transmission parameter from at least two transmission parameters, and if any two of the at least two transmission parameters are different, different terminal devices transmit reference signals based on different transmission parameters, which can reduce conflicts between reference signals of different terminal devices and improve the accuracy of channel estimation.

[0105] Optionally, the memory and the memory in the above-mentioned device embodiments may be physically independent units, or the memory may be integrated with the processor.

[0106] In addition, the present application also provides a computer-readable storage medium, which stores computer instructions. When the computer instructions are executed on a computer, the computer executes the operations and / or processing performed by the first terminal device in the method for sending side control information provided in the present application.

[0107] The present application also provides a computer-readable storage medium, in which computer instructions are stored. When the computer instructions are executed on a computer, the computer executes the operations and / or processing performed by the second terminal device in the method for sending side control information provided in the present application.

[0108] The present application also provides a computer program product, which includes computer program code. When the computer program code runs on a computer, it enables the computer to execute the operations and / or processing performed by the first terminal device in the method for sending side control information provided in the present application.

[0109] The present application also provides a computer program product, which includes computer program code. When the computer program code runs on a computer, it enables the computer to execute the operations and / or processing performed by the second terminal device in the method for sending side control information provided by the present application.

[0110] The present application also provides a terminal device, including a processor and an interface circuit, wherein the interface circuit is used to receive computer codes or instructions and transmit them to the processor, and the processor is used to run the computer codes or instructions to execute the operations and / or processing performed by the first terminal device in the method for sending side control information provided in the present application.

[0111] The present application also provides a terminal device, including a processor and an interface circuit, wherein the interface circuit is used to receive computer codes or instructions and transmit them to the processor, and the processor is used to run the computer codes or instructions to execute the operations and / or processing performed by the second terminal device in the method for sending side control information provided in the present application.

[0112] The present application also provides a chip, the chip comprising one or more processors. The one or more processors are used to execute a computer program stored in a memory to perform the operation and / or processing performed by the first terminal device in any one of the method embodiments. The memory for storing the computer program is set independently of the chip.

[0113] Furthermore, the chip may further include one or more communication interfaces. The one or more communication interfaces may be input / output interfaces, input / output circuits, etc. Furthermore, the chip may further include one or more memories.

[0114] The present application also provides a chip, the chip comprising one or more processors. The one or more processors are used to execute a computer program stored in a memory to perform the operation and / or processing performed by the second terminal device in any one of the method embodiments. The memory for storing the computer program is set independently of the chip.

[0115] Furthermore, the chip may further include one or more communication interfaces. The one or more communication interfaces may be input / output interfaces, input / output circuits, etc. Furthermore, the chip may further include one or more memories.

[0116] In addition, the present application also provides a side communication system, including the first terminal device, the second terminal device, the third terminal device and / or the first network device in the embodiment of the present application.

[0117] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0118] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0119] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0120] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program code.

[0121] The above is only a specific implementation of the present application. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. The protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method for transmitting a reference signal, characterized in that: include: The first communication device determines a first transmission parameter from at least two transmission parameters according to the identification information of the first communication device and the correspondence between the identification information of at least two communication devices and the at least two transmission parameters, any two of the at least two transmission parameters are different, and the first transmission parameter is used to determine a first transmission resource of a first reference signal; the correspondence is a many-to-one correspondence; the identification of the first communication device includes M bits, the identification information of the first communication device includes N bits of the identification of the first communication device, the N bits belong to the M bits, and both M and N are positive integers; The first communication device sends the first reference signal to a second communication device on the first transmission resource.

2. The method according to claim 1, characterized in that The at least two transmission parameters and the corresponding relationship between the identification information of the at least two communication devices and the at least two transmission parameters are predefined by the protocol; or The first communication device receives first configuration information from a first network device, where the first configuration information indicates the at least two transmission parameters and a correspondence between the identification information of the at least two communication devices and the at least two transmission parameters; or The first communication device receives second configuration information from a third communication device, where the second configuration information indicates the at least two transmission parameters and a correspondence between the identification information of the communication device and the transmission parameters.

3. The method according to claim 1 or 2, characterized in that: The first communication device sends first sidelink control information to the second communication device on a second transmission resource other than the first transmission resource, and the second transmission resource includes the first transmission resource.

4. The method according to claim 3, characterized in that The first sideline control information includes (MN) bits of the identifier of the first communication device except the N bits.

5. The method according to claim 4, characterized in that The first sidelink control information is carried on a first sidelink control channel, and the first reference signal is used for channel estimation of the first sidelink control channel.

6. The method according to any one of claims 1-2, 4-5, characterized in that: The first transmission parameter is used to determine a first transmission resource of a first reference signal, including: The first transmission parameter is used to determine a transmission pattern of a first reference signal, and the transmission pattern is used to determine the first transmission resource.

7. The method according to any one of claims 1-2, 4-5, characterized in that: The first transmission parameter includes a resource offset, and the resource offset is used to determine a starting position or a transmission pattern of a transmission resource of the first reference signal.

8. The method according to any one of claims 1-2, 4-5, characterized in that: The first transmission resource includes at least two sub-resources, each of the at least two sub-resources is used to transmit the first reference signal, and the at least two sub-resources are frequency division multiplexed.

9. A method for transmitting a reference signal, characterized in that: include: The first network device determines first configuration information, where the first configuration information is used to indicate at least two transmission parameters and a correspondence between identification information of at least two communication devices and the at least two transmission parameters, where the correspondence is a many-to-one correspondence, where any two of the at least two transmission parameters are different, and where the at least two transmission parameters and the correspondence between the identification information of at least two communication devices and the at least two transmission parameters are used to determine a first transmission parameter, where the first transmission parameter is used to determine a first transmission resource of a first reference signal; The first network device sends the first configuration information to the first communication device; The identification of one of the at least two communication devices includes M bits, and the identification information of one of the at least two communication devices includes N bits of the identification of one of the at least two communication devices, the N bits belong to the M bits, and M and N are both positive integers.

10. The method according to claim 9, characterized in that The first configuration information is further used to indicate a second transmission resource, resources on the second transmission resource other than the first transmission resource are used to transmit first sideline control information, and the second transmission resource includes the first transmission resource.

11. The method according to claim 10, characterized in that The first sideline control information includes (MN) bits of an identifier of one of the at least two communication devices except the N bits.

12. The method according to any one of claims 10-11, characterized in that: The first sidelink control information is carried on a first sidelink control channel, and the first reference signal is used for channel estimation of the first sidelink control channel.

13. The method according to any one of claims 9 to 11, characterized in that: The first transmission parameter is used to determine a first transmission resource of a first reference signal, including: The first transmission parameter is used to determine a transmission pattern of a first reference signal, and the transmission pattern is used to determine the first transmission resource.

14. The method according to any one of claims 9 to 11, characterized in that: The first transmission parameter includes a resource offset, and the resource offset is used to determine a starting position or a transmission pattern of a transmission resource of the first reference signal.

15. The method according to any one of claims 9 to 11, characterized in that: The first transmission resource includes at least two sub-resources, each of the at least two sub-resources is used to transmit the first reference signal, and the at least two sub-resources are frequency division multiplexed.

16. A first communication device, characterized in that: include: A processing unit, configured to determine a first transmission parameter from at least two transmission parameters according to the identification information of the first communication device and the correspondence between the identification information of at least two communication devices and the at least two transmission parameters, wherein any two of the at least two transmission parameters are different, and the first transmission parameter is used to determine a first transmission resource of a first reference signal; the correspondence is a many-to-one correspondence; the identification of the first communication device includes M bits, the identification information of the first communication device includes N bits of the identification of the first communication device, the N bits belong to the M bits, and both M and N are positive integers; A transceiver unit is used to send the first reference signal to the second communication device on the first transmission resource.

17. The device according to claim 16, characterized in that The at least two transmission parameters and the corresponding relationship between the identification information of the at least two communication devices and the at least two transmission parameters are predefined by the protocol; or The transceiver unit is further configured to receive first configuration information from a first network device, wherein the first configuration information indicates the at least two transmission parameters and a correspondence between the identification information of the at least two communication devices and the at least two transmission parameters; or The transceiver unit is further configured to receive second configuration information from a third communication device, where the second configuration information indicates the at least two transmission parameters and a correspondence between the identification information of the communication device and the transmission parameters.

18. The device according to any one of claims 16-17, characterized in that: The transceiver unit is further configured to send first side control information to the second communication device on a second transmission resource other than the first transmission resource, wherein the second transmission resource includes the first transmission resource.

19. The device according to claim 18, characterized in that The first sideline control information includes (MN) bits of the identifier of the first communication device except the N bits.

20. The device according to claim 19, characterized in that The first sidelink control information is carried on a first sidelink control channel, and the first reference signal is used for channel estimation of the first sidelink control channel.

21. The device according to any one of claims 16-17, 19-20, characterized in that: The first transmission parameter is used to determine a first transmission resource of a first reference signal, including: The first transmission parameter is used to determine a transmission pattern of a first reference signal, and the transmission pattern is used to determine the first transmission resource.

22. The device according to any one of claims 16-17, 19-20, characterized in that: The first transmission parameter includes a resource offset, and the resource offset is used to determine a starting position or a transmission pattern of a transmission resource of the first reference signal.

23. The device according to any one of claims 16-17, 19-20, characterized in that: The first transmission resource includes at least two sub-resources, each of the at least two sub-resources is used to transmit the first reference signal, and the at least two sub-resources are frequency division multiplexed.

24. A first network device, characterized in that: include: a processing unit, configured to determine first configuration information, wherein the first configuration information is used to indicate at least two transmission parameters and a correspondence between identification information of at least two communication devices and the at least two transmission parameters, wherein the correspondence is a many-to-one correspondence, and any two of the at least two transmission parameters are different. The at least two transmission parameters and the correspondence between the identification information of at least two communication devices and the at least two transmission parameters are used to determine a first transmission parameter, and the first transmission parameter is used to determine a first transmission resource of a first reference signal; A transceiver unit, configured to send the first configuration information to a first communication device; The identification of one of the at least two communication devices includes M bits, and the identification information of one of the at least two communication devices includes N bits of the identification of one of the at least two communication devices, the N bits belong to the M bits, and M and N are both positive integers.

25. The device according to claim 24, characterized in that The first configuration information is further used to indicate a second transmission resource, resources on the second transmission resource other than the first transmission resource are used to transmit first sideline control information, and the second transmission resource includes the first transmission resource.

26. The device according to claim 25, characterized in that The first sideline control information includes (MN) bits of an identifier of one of the at least two communication devices except the N bits.

27. The device according to any one of claims 25-26, characterized in that The first sidelink control information is carried on a first sidelink control channel, and the first reference signal is used for channel estimation of the first sidelink control channel.

28. The device according to any one of claims 24 to 26, characterized in that: The first transmission parameter is used to determine a first transmission resource of a first reference signal, including: The first transmission parameter is used to determine a transmission pattern of a first reference signal, and the transmission pattern is used to determine the first transmission resource.

29. The device according to any one of claims 24 to 26, characterized in that: The first transmission parameter includes a resource offset, and the resource offset is used to determine a starting position or a transmission pattern of a transmission resource of the first reference signal.

30. The device according to any one of claims 24 to 26, characterized in that: The first transmission resource includes at least two sub-resources, each of the at least two sub-resources is used to transmit the first reference signal, and the at least two sub-resources are frequency division multiplexed.

31. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed on a computer, the computer is enabled to execute the method according to any one of claims 1 to 8.

32. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed on a computer, the computer is enabled to execute the method according to any one of claims 9 to 15.

33. A communication device, characterized in that: The communication device comprises: At least one processor, the at least one processor is coupled to a memory, and the at least one processor is used to call and execute instructions from the memory, so that the communication device implements the method according to any one of claims 1 to 8.

34. A communication device, characterized in that: The communication device comprises: At least one processor, the at least one processor is coupled to a memory, and the at least one processor is used to call and execute instructions from the memory, so that the communication device implements the method according to any one of claims 9 to 15.

35. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is run on a computer, the computer is caused to execute the method according to any one of claims 1 to 8.

36. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is run on a computer, the computer is caused to execute the method according to any one of claims 9 to 15.

37. A system, characterized in that: It comprises the device as described in any one of claims 16-23 and the device as described in any one of claims 24-30.

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