WO2021000680A1

WO2021000680A1 - Cooperation transmission method and communication apparatus

Info

Publication number: WO2021000680A1
Application number: PCT/CN2020/093412
Authority: WO
Inventors: 向铮铮; 张鹏
Original assignee: 华为技术有限公司
Priority date: 2019-07-03
Filing date: 2020-05-29
Publication date: 2021-01-07
Also published as: CN112188622A

Abstract

A cooperation transmission method and a communication apparatus, which can be applied to the Internet of vehicles, such as V2X, LTE-V, and V2V. Said method comprises: a first terminal device receiving a first reference signal from a network device to obtain a measurement value of the first reference signal, and receiving a second reference signal from a second terminal device to obtain a measurement value of the second reference signal, determining a comprehensive channel quality parameter according to the measurement value of the first reference signal and/or the measurement value of the second reference signal, and sending the comprehensive channel quality parameter to the network device or the second terminal device, the comprehensive channel quality parameter being used for determining at least one terminal device that performs cooperation transmission with the second terminal device. As the comprehensive channel quality parameter can comprehensively reflect the comprehensive channel quality between the first terminal device and the network device and the second terminal device, a more appropriate cooperation terminal device can be selected, thereby effectively improving the cooperation transmission performance.

Description

Cooperative transmission method and communication device

Cross references to related applications

This application claims the priority of a Chinese patent application filed with the State Intellectual Property Office of China, the application number is 201910595904.6, and the application name is "a cooperative transmission method and communication device" on July 3, 2019. The entire content is incorporated by reference in In this application.

Technical field

This application relates to the field of communication technology, and in particular to a cooperative transmission method and communication device.

Background technique

In a vehicle-to-everything (V2X) communication system, terminal equipment and network equipment can communicate through a Uu interface, and the communication links used include uplink and downlink. At the same time, terminal devices can communicate directly through the PC5 interface, and the communication link used is called the side-link. With the help of the side link between the terminal devices, user-cooperative communication can be carried out.

User cooperative communication is an effective means to improve system capacity and network coverage. For a target terminal equipment (target user equipment, TUE), the TUE can form a user cooperation group with at least one cooperation user equipment (CUE). The base station can send data to the TUE and related CUE, and then the CUE forwards the correctly received data to the TUE through the side link. The TUE performs joint decoding based on the data directly received from the base station and the data received from the CUE, thereby improving Receiving performance. Alternatively, the TUE may not receive data from the base station, but only receive data from the CUE and decode it.

In the prior art, there is no relevant solution for how to determine the CUE for user collaboration. If the CUE is not properly selected, it will affect the transmission performance of the TUE.

Summary of the invention

The embodiments of the present application provide a cooperative transmission method and a communication device, which are used to determine a CUE for user cooperation and improve the transmission performance of the TUE.

In the first aspect, an embodiment of the present application provides a cooperative transmission method, which can be applied to a first terminal device, and the method includes: the first terminal device receives a first reference signal from a network device to obtain a measurement value of the first reference signal ; The first terminal device receives the second reference signal from the second terminal device to obtain the measured value of the second reference signal; the first terminal device determines the integrated value according to the measured value of the first reference signal and/or the measured value of the second reference signal A channel quality parameter, where the comprehensive channel quality parameter is used to determine at least one terminal device that performs cooperative transmission with the second terminal device; the first terminal device sends the comprehensive channel quality parameter to the network device or the second terminal device.

Using the technical solution provided by the embodiments of this application, the first terminal device can send a comprehensive channel quality parameter to the network device or the second terminal device, and the network device or the second terminal device determines to communicate with the second terminal device according to the comprehensive channel quality parameter. At least one terminal device for cooperative transmission. Since the comprehensive channel quality parameter is determined according to the measured value of the first reference signal sent by the network device and the measured value of the second reference signal sent by the second terminal device, when determining the cooperative terminal device of the second terminal device, It can comprehensively consider the channel quality between the first terminal device and the network device, and the channel quality between the first terminal device and the second terminal device, so as to improve the effectiveness of cooperative terminal device selection and enhance the second terminal device’s performance. Transmission performance and reliability.

In a possible design, the second reference signal is the side link channel state information reference signal SL CSI-RS; the method further includes: the first terminal device receives the first configuration information or the first configuration from the second terminal device Information indicating information, the first configuration information indicating the parameters used to transmit SL CSI-RS; the first terminal device receiving the second reference signal from the second terminal device includes: the first terminal device receiving the SL CSI according to the first configuration information -RS.

In a possible design, the second reference signal is a sounding reference signal SRS, which is sent by the second terminal device to the network device; the method further includes: the first terminal device receives the second configuration information or the first configuration information from the network device 2. Indication information of configuration information, where the second configuration information indicates parameters for transmitting SRS; the first terminal device receiving the second reference signal from the second terminal device includes: the first terminal device receives the SRS according to the second configuration information.

In a possible design, the second configuration information includes the identifier of the second terminal device.

In a possible design, the first reference signal is the channel state information reference signal CSI-RS; the method further includes: the first terminal device receives the third configuration information or the indication information of the third configuration information from the network device, the second The third configuration information indicates the parameters used to transmit the CSI-RS; the first terminal device receiving the first reference signal from the network device includes: the first terminal device receives the CSI-RS according to the third configuration information.

Using the technical solutions provided by the embodiments of the present application, the first reference signal and the second reference signal may have multiple possible implementation modes. For example, the first reference signal may be the CSI-RS sent by the network device via the downlink, and the second reference signal may be the SL CSI-RS sent by the second terminal device via the side link. In this way, the first terminal device may The received CSI-RS and SL CSI-RS respectively determine the channel quality on the downlink and side link, thereby helping to decide whether the first terminal device can act as a cooperative terminal device of the second terminal device.

For another example, the first reference signal may be a CSI-RS sent by the network device through the downlink, and the second reference signal may be multiplexed with the SRS sent by the second terminal device to the network device through the uplink. In this way, the second terminal device There is no need to send the SL CSI-RS to the first terminal device on the side link, or even the additional configuration of the SL CSI-RS, thereby further reducing the signaling overhead of the side link. In this scenario, since the first terminal device needs to listen to the SRS sent by the second terminal device to the network device, when the network device notifies the first terminal device of the SRS configuration of the second terminal device, it can also configure The information carries the identifier of the second terminal device, so that the first terminal device can listen to the SRS sent by the second terminal device instead of the SRS of other terminal devices, thereby improving cooperative transmission efficiency.

In a possible design, before the first terminal device sends the comprehensive channel quality parameter to the network device or the second terminal device, the method further includes: the first terminal device determines that the measured value of the first reference signal is greater than or equal to the first threshold, and Or the measured value of the second reference signal is greater than or equal to the second threshold; and/or, the first terminal device determines that the integrated channel quality parameter is greater than or equal to the third threshold.

Using the technical solution provided by the embodiments of the present application, the measured value of the first reference signal, the measured value of the second reference signal, and the integrated channel quality parameter can all have corresponding thresholds, and the first terminal device can determine the measured value of the first reference signal. Or when the measured value of the second reference signal is less than the corresponding threshold, or when the determined integrated channel quality parameter is less than the corresponding threshold, the integrated channel quality parameter is not sent. In this way, if the first terminal device sends a comprehensive channel quality parameter to the network device or the second terminal device, it means that the channel quality between the first terminal device and the network device and the second terminal device is better, which can make the first terminal device have better channel quality. The comprehensive channel quality parameters sent by the terminal equipment have more reference value. This improves the effectiveness of determining cooperative terminal devices.

In a possible design, the method further includes: the first terminal device receives first indication information from the network device, the first indication information indicating the difference between the transmission power of the first reference signal and the transmission power of the second reference signal Difference; thus, the first terminal device determines the comprehensive channel quality parameter according to the measured value of the first reference signal and/or the measured value of the second reference signal, which may include: the first terminal device according to the measured value of the first reference signal, The measured value of the second reference signal and the difference value determine the integrated channel quality parameter.

Using the technical solutions provided by the embodiments of the present application, the first terminal device may also consider the transmission power of the network device to send the first reference signal when determining the comprehensive channel quality parameter, and the transmission power of the second terminal device to send the second reference signal. Therefore, the comprehensive channel quality parameter determined by the first terminal device is more accurate, thereby determining a more suitable cooperative terminal device for the second terminal device, and improving the cooperative transmission performance. Moreover, the network device can indicate the difference of the transmit power to the first terminal device, which can also make the embodiments of this application applicable to scenarios where the transmit powers of the first reference signal and the second reference signal are different, so that this application can be implemented Cases are more adaptable.

In a possible design, the method further includes: the first terminal device receives second indication information from the network device, the second indication information instructing the first terminal device to send a comprehensive channel quality parameter to the network device or the second terminal device.

With the technical solutions provided by the embodiments of this application, the network device can decide whether the first terminal device can be a cooperative terminal device of the second terminal device, or the second terminal device can decide whether the first terminal device can be the second terminal device itself. Cooperative terminal equipment of the device. Therefore, the network device can indicate to the first terminal device to whom the comprehensive channel quality parameter needs to be sent. In other words, when the network device is responsible for the decision-making cooperation terminal device, the first terminal device can send the comprehensive channel quality parameter to the network device, and when the second terminal device is responsible for the decision-making cooperation terminal device, the first terminal device can send the comprehensive channel quality The parameters are sent to the second terminal device.

In a possible design, the integrated channel quality parameter is a function of the measured value of the first reference signal and/or the measured value of the second reference signal; in this way, the first terminal device determines the integrated channel quality parameter, which may include: The terminal device determines the integrated channel quality parameter according to the measured value of the first reference signal and/or the measured value of the second reference signal and the function.

In a possible design, the function satisfies the following relationship: β _i =min{α _i ,S_α _i }, or β _i =(1-γ _i )α _i +γ _i S_α _i }. Among them, β _i is a comprehensive channel quality parameter, α _i is a measurement value of the first reference signal, S_α _i is a measurement value of the second reference signal, γ _i is a weight value and 0≤γ _i ≤1.

In a possible design, the measured value is any one of reference signal received power RSRP, received signal strength indicator RSSI, reference signal received quality RSSQ, and channel noise to interference ratio SINR, thereby improving the applicability of the embodiments of the present application.

In a possible design, the first terminal device may also send the measured value of the first reference signal and/or the measured value of the second reference channel directly to the network device or the second terminal device, and the network device or the second terminal device According to the measured value of the first reference signal and/or the measured value of the second reference channel, the device uses the above method to determine the integrated channel quality parameter by itself, and then determines the terminal device for cooperative transmission with the second terminal device.

In the second aspect, the embodiments of the present application provide another cooperative transmission method, which can be applied to a network device, and the method includes: the network device sends a first reference signal to a first terminal device; the network device receives integrated transmission from the first terminal device The channel quality parameter, the comprehensive channel quality parameter is determined by the first terminal device according to the measured value of the first reference signal and/or the measured value of the second reference signal, the second reference signal being received by the first terminal device from the second terminal device A reference signal; the network device determines at least one terminal device for cooperative transmission with the second terminal device according to the comprehensive channel quality parameter.

Using the technical solution provided by the embodiments of the present application, since the comprehensive channel quality parameter is determined by the first terminal device according to the measured value of the first reference signal sent by the network device and the measured value of the second reference signal sent by the second terminal device, Therefore, when the network device determines at least one terminal device for cooperative transmission with the second terminal device according to the comprehensive channel quality parameter, it can comprehensively consider the channel quality between the first terminal device and the network device, the first terminal device and the second terminal device. There are two factors of channel quality between terminal devices, thereby improving the effectiveness of cooperative terminal device selection and enhancing the transmission performance and reliability of the second terminal device.

In a possible design, the second reference signal is the side link channel state information reference signal SL CSI-RS; the method further includes: the network device sends the first configuration information or the first configuration information to the second terminal device Indication information, the first configuration information indicates parameters used to transmit SL CSI-RS.

In a possible design, the second reference signal is a sounding reference signal SRS; the method further includes: the network device sends the second configuration information or the second configuration information indication information to the first terminal device and the second terminal device, and The second configuration information indicates the parameters used to transmit SRS.

In a possible design, the first reference signal is a channel state information reference signal CSI-RS; the method further includes: the network device sends third configuration information or indication information of the third configuration information to the first terminal device, the second Third, the configuration information indicates the parameters used to transmit CSI-RS.

For another example, the first reference signal may be a CSI-RS sent by the network device through the downlink, and the second reference signal may be multiplexed with the SRS sent by the second terminal device to the network device through the uplink. In this way, the second terminal device There is no need to send the SL CSI-RS to the first terminal device on the side link, or even the additional configuration of the SL CSI-RS, thereby further reducing the signaling overhead of the side link. In this scenario, since the first terminal device needs to listen to the SRS sent by the second terminal device to the network device, when the network device notifies the second terminal device of the SRS configuration, it may also carry the first terminal device in the configuration information. Second, the identification of the terminal device, so that the first terminal device can listen to the SRS sent by the second terminal device instead of the SRS of other terminal devices, thereby improving the efficiency of cooperative transmission.

In a possible design, the method further includes: the network device sends first indication information to the first terminal device, where the first indication information is used to indicate the difference between the transmission power of the first reference signal and the transmission power of the second reference signal. The deviation between.

In a possible design, the method further includes: the network device sends second indication information to the first terminal device, the second indication information instructing the first terminal device to send the comprehensive channel quality parameter to the network device or the second terminal device.

In one possible design, the integrated channel quality parameter is a function of the measured value of the first reference signal and the measured value of the second reference signal.

In a possible design, the network device may also receive the measured value of the first reference signal and/or the measured value of the second reference channel directly sent by the first terminal device, and then according to the measured value of the first reference signal and/or For the measurement value of the second reference channel, the comprehensive channel quality parameter is determined by the above method, and then the terminal device that performs cooperative transmission with the second terminal device is determined.

In the third aspect, the embodiments of the present application provide yet another cooperative transmission method, which can be applied to a second terminal device. The method includes: the second terminal device sends a second reference signal to the first terminal device; The first terminal device receives the comprehensive channel quality parameter, which is determined by the first terminal device according to the measured value of the first reference signal and/or the measured value of the second reference signal, the first reference signal being the first terminal device A reference signal received from a network device; the second terminal device determines at least one terminal device for cooperative transmission with the second terminal device according to the comprehensive channel quality parameter.

Using the technical solution provided by the embodiments of the present application, since the comprehensive channel quality parameter is determined by the first terminal device according to the measured value of the first reference signal sent by the network device and the measured value of the second reference signal sent by the second terminal device, Therefore, when the second terminal device determines at least one terminal device for cooperative transmission with the second terminal device according to the comprehensive channel quality parameter, it can comprehensively consider the channel quality between the first terminal device and the network device, and the first terminal device and There are two factors of channel quality between the second terminal devices, thereby improving the effectiveness of cooperative terminal device selection and enhancing the transmission performance and reliability of the second terminal device.

In a possible design, the second reference signal is a side link channel state information reference signal SL CSI-RS; the method further includes: the second terminal device receives the first configuration information or the first configuration information from the network device Indication information, the first configuration information indicates parameters used to transmit SL CSI-RS.

In a possible design, the second reference signal is an uplink sounding reference signal SRS; the method further includes: the network device sends the second configuration information or the indication information of the second configuration information to the second terminal device, the second configuration information Indicates the parameters used to transmit SRS.

In a possible design, the first reference signal is a channel state information reference signal CSI-RS.

In a possible design, the second terminal device may also receive the measured value of the first reference signal and/or the measured value of the second reference channel directly sent by the first terminal device, and then according to the measured value of the first reference signal and /Or the measured value of the second reference channel, the comprehensive channel quality parameter is determined by the above method, and then the terminal device for cooperative transmission with the second terminal device is determined.

In a fourth aspect, an embodiment of the present application provides a communication device that has the function of the first terminal device in any possible design of the first aspect or the first aspect, or has the function of the third aspect or The function of the second terminal device in any possible design of the third aspect. The communication device may be a terminal device, such as a handheld terminal device, a vehicle-mounted terminal device, etc., or a device included in the terminal device, such as a chip, or a device including a terminal device. The functions of the above-mentioned terminal device may be realized by hardware, or may be realized by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions.

The communication device may also have the function of realizing the second aspect or the network device in any possible design of the second aspect. The communication device may be a network device, such as a base station, or a device included in the network device, such as a chip. The functions of the above-mentioned network equipment may be realized by hardware, or may be realized by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions.

In a possible design, the structure of the communication device includes a processing module and a transceiver module, wherein the processing module is configured to support the communication device to perform the corresponding function in the first aspect or any one of the first aspects. , Or perform the corresponding function in the above-mentioned second aspect or any design of the second aspect, or perform the corresponding function in the above-mentioned third aspect or any design of the third aspect. The transceiver module is used to support communication between the communication device and other communication devices. For example, when the communication device is a first terminal device, it can receive a first reference signal from a network device and a second reference signal from a second terminal device. The communication device may also include a storage module, which is coupled with the processing module, which stores program instructions and data necessary for the communication device. As an example, the processing module may be a processor, the communication module may be a transceiver, and the storage module may be a memory. The memory may be integrated with the processor or may be provided separately from the processor, which is not limited in this application.

In another possible design, the structure of the communication device includes a processor and may also include a memory. The processor is coupled with the memory, and can be used to execute the computer program instructions stored in the memory, so that the communication device executes the method in any possible design of the first aspect or the first aspect, or executes the second aspect or the second aspect. The method in any possible design of the aspect, or the method in any possible design of the third aspect or the third aspect. Optionally, the communication device further includes a communication interface, and the processor is coupled with the communication interface. When the communication device is a terminal device, the communication interface may be a transceiver or an input/output interface; when the communication device is a chip included in the terminal device, the communication interface may be an input/output interface of the chip. Optionally, the transceiver may be a transceiver circuit, and the input/output interface may be an input/output circuit.

In a fifth aspect, an embodiment of the present application provides a chip system, including: a processor, the processor is coupled with a memory, the memory is used to store a program or instruction, when the program or instruction is executed by the processor , So that the chip system implements any possible design method in the first aspect, or implements any possible design method in the second aspect, or implements any possible design in the third aspect. Method in design.

Optionally, there may be one or more processors in the chip system. The processor can be implemented by hardware or software. When implemented by hardware, the processor may be a logic circuit, an integrated circuit, or the like. When implemented by software, the processor may be a general-purpose processor, which is implemented by reading software codes stored in the memory.

Optionally, there may be one or more memories in the chip system. The memory may be integrated with the processor, or may be provided separately from the processor, which is not limited in this application. Exemplarily, the memory may be a non-transitory processor, such as a read-only memory ROM, which may be integrated with the processor on the same chip, or may be set on different chips. The setting method of the processor is not specifically limited.

In a sixth aspect, embodiments of the present application provide a computer-readable storage medium that stores computer-readable instructions. When the computer reads and executes the computer-readable instructions, the computer is caused to execute the first The method in any possible design of the aspect, or the method in any possible design of the foregoing second aspect, or the method in any possible design of the foregoing third aspect.

In a seventh aspect, the embodiments of the present application provide a computer program product. When the computer reads and executes the computer program product, the computer executes any of the possible design methods in the first aspect, or executes the first The method in any possible design of the second aspect, or the method in any possible design of the foregoing third aspect.

In an eighth aspect, an embodiment of the present application provides a communication system, which includes the network device, the first terminal device, and the second terminal device.

Description of the drawings

Figures 1a and 1b are schematic diagrams of a network architecture of a communication system to which an embodiment of this application is applicable;

FIG. 2 is a schematic flowchart of a cooperative transmission method provided by an embodiment of the application;

3 is a schematic diagram of a cooperative transmission process when the first reference signal is CSI-RS and the second reference signal is SL CSI-RS in an embodiment of this application;

4 is a schematic diagram of a cooperative transmission process when the first reference signal is CSI-RS and the second reference signal is SRS in an embodiment of this application;

Fig. 5 is a plurality of potential CUEs in a user cooperation group provided in an embodiment of the application.

FIG. 6 is a schematic structural diagram of a communication device provided by an embodiment of this application;

FIG. 7 is another schematic structural diagram of a communication device provided by an embodiment of the application;

FIG. 8 is a schematic structural diagram of another communication device provided by an embodiment of this application;

FIG. 9 is a schematic diagram of another structure of another communication device provided by an embodiment of the application.

Detailed ways

In order to make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

The technical solutions of the embodiments of this application can be applied to various communication systems, such as: global system for mobile communications (GSM) system, code division multiple access (CDMA) system, broadband code division multiple access (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), universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WIMAX) communication system, fifth generation (5G) System or new radio (NR) system, or applied to future communication systems or other similar communication systems.

Furthermore, the embodiments of this application can also be applied to the evolved universal mobile telecommunications system terrestrial radio access network (E-UTRAN) system, or the next generation (NG)-RAN The system can also be applied to next-generation communication systems or similar communication systems.

Please refer to FIG. 1a and FIG. 1b, which are schematic diagrams of a network architecture of a communication system to which an embodiment of this application is applicable. The communication system includes a network device 110, a terminal device 120, a terminal device 130, and a terminal device 140. The terminal device 120, the terminal device 130, and the terminal device 140 belong to a user cooperation group, the terminal device 120 is a TUE in the user cooperation group, and the terminal device 130 and the terminal device 140 are CUEs in the user cooperation group.

In the scenario shown in Figure 1a, cooperative transmission includes two stages. In the first stage, the network device 110 sends data to the terminal device 120, the terminal device 130, and the terminal device 140, for example, in the form of multicast. In the second stage, the terminal device 130 and the terminal device 140 respectively send the received data to the terminal device 120 via the side link. Before sending the received data to the terminal device 120, the terminal device 130 and the terminal device 140 may also perform processing such as amplifying, decoding, and compressing the data, which is not limited in this application. In this way, the terminal device 120 can jointly decode the data received from the network device 110 in the first stage and the data received from the terminal device 130 and the terminal device 140 in the second stage, thereby improving reception performance.

In the scenario shown in Figure 1b, cooperative transmission also includes two stages. In the first stage, the network device 110 sends data to the terminal device 130 and the terminal device 140. Because the terminal device 120 is outside the cell coverage or the channel quality of the terminal device 120 is too poor, the terminal device 120 does not receive data from the network device 110 in the first stage. Only in the second stage, the forwarded data is received from the terminal device 130 and the terminal device 140 for joint decoding.

The network devices in Figure 1a and Figure 1b may be access network devices, such as base stations. Wherein the access network device corresponding to the different devices in different systems, for example, in the fourth generation mobile communication technology (the 4 ^th generation, 4G) systems may correspond evolved base station (Evolutional Node B, eNB), in a system 5G It can correspond to 5G access network equipment, such as gNB.

The user cooperation group in FIGS. 1a and 1b may include the terminal device 120, the terminal device 130, and the terminal device 140, or may only include the terminal device 120 and the terminal device 130. In other words, in a user cooperation group, a TUE can have one or more CUEs serving it. In a cell, there can be multiple different user cooperation groups. For a terminal device, it can be a TUE of a user cooperative group centered on itself, or a CUE of one or more other user cooperative groups.

It should be understood that the terminal device 120, the terminal device 130, and the terminal device 140 shown in FIG. 1a and FIG. 1b are only an example. The network device may provide services for multiple terminal devices. The number is not specifically limited. Moreover, the terminal devices in FIG. 1a and FIG. 1b are shown by taking a mobile phone as an example, but the application is not limited to this, and the terminal device may also be other types of terminal devices, such as vehicle-mounted terminal devices or vehicles. It should also be understood that the embodiments of the present application are not limited to 4G or 5G systems, and are also applicable to subsequent evolved communication systems.

Hereinafter, some terms in the embodiments of the present application will be explained to facilitate the understanding of those skilled in the art.

1) Terminal equipment, also known as user equipment (UE), mobile station (MS), mobile terminal (MT), etc., is a way to provide users with voice and/or data connectivity Sexual equipment. The terminal device may communicate with the core network via a radio access network (RAN), and exchange voice and/or data with the RAN. For example, the terminal device may be a handheld device with a wireless connection function, a vehicle-mounted device, etc. At present, some examples of terminal devices are: mobile phones (mobile phones), tablets, laptops, palmtop computers, mobile internet devices (MID), wearable devices, virtual reality (VR) devices, augmented Augmented reality (AR) equipment, wireless terminals in industrial control (industrial control), wireless terminals in self-driving (self-driving), wireless terminals in remote medical surgery, and smart grid (smart grid) The wireless terminal in the transportation safety (transportation safety), the wireless terminal in the smart city (smart city), the wireless terminal in the smart home (smart home), etc. The terminal device in the embodiments of the present application may also be a vehicle-mounted module, vehicle-mounted module, vehicle-mounted component, vehicle-mounted chip, or vehicle-mounted unit that is built into a vehicle as one or more components or units. Modules, on-board components, on-board chips, or on-board units can implement the methods provided in the embodiments of the present application.

2) Network equipment is the equipment used in the network to connect terminal equipment to the wireless network. The network device may be a node in a radio access network, may also be called a base station, or may also be called a radio access network (RAN) node (or device). The network device can be used to convert received air frames and Internet Protocol (IP) packets to each other, and act 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 network equipment can also coordinate the attribute management of the air interface. For example, the network equipment may include an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in a long term evolution (LTE) system or an evolved LTE system (LTE-Advanced, LTE-A), or It can also include the next generation node B (gNB) in the new radio (NR) system of the fifth generation mobile communication technology (5G), or it can also include the transmission reception point. , TRP), home base station (for example, home evolved NodeB, or home Node B, HNB), baseband unit (BBU), or WiFi access point (access point, AP), etc., or may also include cloud A centralized unit (CU) and a distributed unit (DU) in an access network (cloud radio access network, CloudRAN) system are not limited in this embodiment of the application. For another example, a network device in a V2X technology is a roadside unit (RSU). The RSU may be a fixed infrastructure entity that supports V2X applications, and can exchange messages with other entities that support V2X applications.

3) The terms "system" and "network" in the embodiments of this application can be used interchangeably. "Multiple" refers to two or more. In view of this, "multiple" may also be understood as "at least two" in the embodiments of the present application. "At least one" can be understood as one or more, for example, one, two or more. For example, including at least one means including one, two or more, and it does not limit which ones are included. For example, if at least one of A, B, and C is included, then A, B, C, A and B, A and C, B and C, or A and B and C are included. In the same way, the understanding of "at least one" and other descriptions is similar. "And/or" describes the association relationship of the associated objects. It means that there can be three kinds of relationships. For example, A and/or B can mean: A alone exists, A and B exist at the same time, and B exists alone. In addition, the character "/", unless otherwise specified, generally indicates that the associated objects before and after are in an "or" relationship.

Unless otherwise stated, the ordinal numbers such as "first" and "second" mentioned in the embodiments of this application are used to distinguish multiple objects, and are not used to limit the order, timing, priority, or importance of multiple objects. And the description of "first" and "second" does not limit the objects to be different.

Please refer to FIG. 2, which is a schematic flowchart of a cooperative transmission method provided by an embodiment of this application. The method includes the following steps S201 to S206:

Step S201: The network device sends a first reference signal to the first terminal device.

The first terminal device is a potential cooperative terminal device CUE. The network device may send the first reference signal to the first terminal device, so that the first terminal device reports the channel quality between itself and the network device. The channel quality between the first terminal device and the network device can be used to determine whether the first terminal device can be used as a cooperative terminal device of the second terminal device.

The first reference signal may be a channel state information reference signal (channel state information reference signal, CSI-RS). In the embodiment of the present application, the network device may configure the first reference signal for the first terminal device. For example, the network device may send first configuration information or indication information of the first configuration information to the first terminal device, where the first configuration information indicates the parameters used to transmit the CSI-RS, so that the first terminal device can follow the first The configuration information receives CSI-RS from the network device. The parameters for transmitting CSI-RS may include, for example, time-frequency resources occupied by the CSI-RS.

Step S202: The first terminal device receives the first reference signal from the network device, and obtains a measurement value of the first reference signal.

The first terminal device may receive and measure the first reference signal from the network device, and the measurement value of the first reference signal may reflect the channel quality between the first terminal device and the network device. The measured value can be reference signal received power (RSRP), received signal strength indicator (RSSI), reference signal received quality (RSSQ), channel noise to interference ratio (signal) -to-noise and interference ratio, SINR), any one of path loss. The higher the RSRP of the CSI-RS, the better the channel quality between the first terminal device and the network device, and the same is true for RSSI, RSSQ, and SINR.

Step S203: The second terminal device sends a second reference signal to the first terminal device.

The second terminal device is the target terminal device TUE, that is, a terminal device that requires other terminal devices to cooperate in data transmission. The second terminal device may send the second reference signal to the first terminal device, so that the first terminal device reports the channel quality between itself and the second terminal device. Wherein, the channel quality between the first terminal device and the second terminal device can be used to determine whether the first terminal device can serve as a cooperative terminal device of the second terminal device.

In a possible implementation manner, the second reference signal may be a sidelink channel state information reference signal (SL CSI-RS). The network device may configure the SL CSI-RS for the second terminal device. For example, the network device may send the first configuration information or the indication information of the first configuration information to the second terminal device, and the first configuration information is used to indicate the parameters of the SL CSI-RS transmission, so that the second terminal device can send the second reference signal. Subsequently, the second terminal device may forward the first configuration information or the first configuration information to the first terminal device, so that the first terminal device receives the second reference signal sent by the second terminal device. The parameters for transmitting the SL CSI-RS may include, for example, time-frequency resources occupied by the SL CSI-RS.

In another possible implementation manner, the second reference signal may be a sounding reference signal (sounding reference signal, SRS). Generally, the SRS is a reference signal sent by the second terminal device to the network device for the network device to measure the uplink channel, and the network device can configure the SRS for the second terminal device. To enable the first terminal device to also receive the SRS, in this embodiment of the application, the network device may also notify the first terminal device of the SRS configured for the second terminal device. For example, the network device may send the second configuration information or the indication information of the second configuration information to the first terminal device and the second terminal device, where the second configuration information indicates the parameters used to transmit the SRS. The parameters for transmitting the SRS may include, for example, time-frequency resources occupied by the SRS. Further, the second configuration information may also include an identifier of the second terminal device, and the identifier of the second terminal device may be a cell radio network temporary identifier (C-RNTI) of the second terminal device, Used for the first terminal device to identify that the SRS received according to the foregoing second configuration information is from the second terminal device.

Step S204: The first terminal device receives the second reference signal from the second terminal device, and obtains the measured value of the second reference signal.

The first terminal device may receive and measure the second reference signal from the second terminal device, and the measurement value of the second reference signal may reflect the channel quality between the first terminal device and the second terminal device. Similarly, the measurement value can be any of RSRP, RSSI, RSSQ, and SINR. The higher the RSRP of the SL CSI-RS, the better the channel quality between the first terminal device and the second terminal device. The RSSI, RSSQ, and SINR are similar.

Step S205: The first terminal device determines an integrated channel quality parameter according to the measured value of the first reference signal and/or the measured value of the second reference signal, and the integrated channel quality parameter is used to determine at least the amount of coordinated transmission with the second terminal device. A terminal device.

The integrated channel quality parameter is a function of the measured value of the first reference signal and/or the measured value of the second reference signal, so it can reflect the relationship between the first terminal device and the network device, and between the first terminal device and the second terminal device. The overall channel quality between devices. Determining the cooperative terminal device of the second terminal device according to the comprehensive channel quality parameter can ensure that the cooperative terminal device and the network device and the second terminal device have good channel quality, thereby effectively improving the transmission performance of user cooperation.

In the embodiment of the present application, the network device may configure the functional relationship between the integrated channel quality parameter and the measured value of the first reference signal and the measured value of the second reference signal, so that the first terminal device can calculate the integrated channel quality according to the functional relationship. parameter. For example, the network device may send fourth configuration information to the first terminal device, where the fourth configuration information is used to indicate the functional relationship between the integrated channel quality parameter and the measured value of the first reference signal and the measured value of the second reference signal. The fourth configuration information may be physical layer configuration signaling or medium access control (MAC) signaling, or radio resource control (RRC) control signaling. This application does not limited. The functional relationship between the integrated channel quality parameter and the measured value of the first reference signal and the measured value of the second reference signal may also be predefined in the communication system, which is also not limited in this application.

If the integrated channel quality parameter is positively correlated with the measured value of the first reference signal and the measured value of the second reference signal, the larger the integrated channel quality parameter determined by the first terminal device is, the more suitable the first terminal device is 2. Cooperative terminal equipment of terminal equipment. Conversely, if the integrated channel quality parameter is negatively correlated with the measured value of the first reference signal and the measured value of the second reference signal, the smaller the integrated channel quality parameter determined by the first terminal device is, the more suitable the first terminal device is A cooperative terminal device as a second terminal device.

In a specific example, the function can satisfy the following relationship: β _i =min{α _i ,S_α _i }, or β _i =(1-γ _i )α _i +γ _i S_α _i }, where β _i is the comprehensive Channel quality parameter, α _i is the measurement value of the first reference signal, S_α _i is the measurement value of the second reference signal, γ _i is the weight value and 0≤γ _i ≤1.

Since the transmission power of the first reference signal sent by the network device may be different from the transmission power of the second reference signal sent by the second terminal device, in order to obtain more accurate comprehensive channel quality parameters, the network device may notify the first terminal device of the above-mentioned first reference signal The difference between the transmit power of and the transmit power of the second reference signal. For example, the network device may send first indication information to the first terminal device, where the first indication information indicates the difference between the transmission power of the first reference signal and the transmission power of the second reference signal. For another example, the network device may also notify the first terminal device of the transmission power of the first reference signal, and the second terminal device notifies the first terminal device of the transmission power of the second reference signal, and the first terminal device determines the first reference signal by itself. The difference between the transmission power of the signal and the transmission power of the second reference signal.

Furthermore, the first terminal device may correct the measured value of the first reference signal and the measured value of the second reference signal according to the difference between the transmit power of the first reference signal and the transmit power of the second reference signal, and then correct The corrected measurement value of the first reference signal and the measurement value of the second reference signal determine the integrated channel quality parameter. If the measured value of the first reference signal is η and the measured value of the second reference signal is η _s , the difference between the transmission power of the first reference signal and the transmission power of the second reference signal is A, which means the second reference The transmission power of the signal is smaller than the transmission power of the first reference signal by A, then after correction, the measured value of the first reference signal is η, and the measured value of the second reference signal is η _s +A. The first terminal device can substitute η and η _s +A into the above-mentioned functional relationship, thereby obtaining a comprehensive channel quality parameter.

In a possible design, the network device can configure corresponding thresholds for the measured value of the first reference signal, the measured value of the second reference signal, and the integrated channel quality parameter, where the measured value of the first reference signal corresponds to The threshold is the first threshold, the threshold corresponding to the measured value of the second reference signal is the second threshold, and the threshold corresponding to the comprehensive channel quality parameter is the third threshold. In the case that the larger the measurement value of the reference signal, the better the channel quality, and the larger the comprehensive channel quality parameter, the more suitable it is to be a cooperative terminal device, the first terminal device is sending the comprehensive channel quality parameter to the network device or the second terminal device Before, it can also be determined that the measured value of the first reference signal is greater than or equal to the first threshold, and/or the measured value of the second reference signal is greater than or equal to the second threshold; and/or, the first terminal device determines that the integrated channel quality parameter is greater than or equal to the first threshold. Three thresholds.

That is to say, the first terminal device may send the integrated signal to the network device or the second terminal device when the measured value of the first reference signal is greater than or equal to the first threshold, and the measured value of the second reference signal is greater than or equal to the second threshold. Channel quality parameters. Alternatively, the first terminal device may send the comprehensive channel quality parameter to the network device or the second terminal device when the determined comprehensive channel quality parameter is greater than or equal to the third threshold. Still alternatively, the first terminal device may be in the case where the measured value of the first reference signal is greater than or equal to the first threshold, the measured value of the second reference signal is greater than or equal to the second threshold, and the determined integrated channel quality parameter is greater than or equal to the third threshold Next, send the comprehensive channel quality parameter to the network device or the second terminal device. Or, the first terminal device may only determine the integrated channel quality parameter according to the above functional relationship when the measured value of the first reference signal is greater than or equal to the first threshold, and the measured value of the second reference signal is greater than or equal to the second threshold, Otherwise, the comprehensive channel quality parameter is not calculated, and the comprehensive channel quality parameter is not sent to the network device or the second terminal device.

It should be noted that in the embodiment of the present application, the measurement value may also be the path loss, but the path loss is negatively correlated with the channel quality. That is, the smaller the path loss of the CSI-RS, the better the channel quality between the first terminal device and the network device. In the case that the smaller the measured value of the reference signal, the better the channel quality, and the larger the comprehensive channel quality parameter, the more suitable it is to be a cooperative terminal device, the first terminal device is sending the comprehensive channel quality parameter to the network device or the second terminal device Before, it can also be determined that the measured value of the first reference signal is less than or equal to the first threshold, and/or the measured value of the second reference signal is less than or equal to the second threshold; and/or, the first terminal device determines that the integrated channel quality parameter is greater than or equal to the first threshold. Three thresholds.

Step S206: The first terminal device sends the comprehensive channel quality parameter to the network device or the second terminal device.

The first terminal device may send the integrated channel quality parameter through physical layer signaling, and may also send the integrated channel quality parameter through MAC layer signaling or RRC layer signaling, which is not limited in this application. Moreover, any indication information or any configuration process involved in the embodiments of the present application can be sent or configured through physical layer signaling, MAC layer signaling, or RRC layer signaling, which will not be described in detail below.

As mentioned above, the second terminal device is a TUE, and the first terminal device is a potential CUE of the second terminal device. In an application scenario, as shown in FIG. 3, there may be multiple potential cooperative terminal devices CUE around the TUE, such as potential CUE1, potential CUE2, and potential CUE3 in FIG. Each potential CUE can be used as the first terminal device. According to the method shown in Figure 2, it receives CSI-RS from the network device and SL CSI-RS from the TUE, and then according to the measured RSRP and SL of the CSI-RS The RSRP of the CSI-RS calculates the integrated channel quality parameter, and sends the integrated channel quality parameter to the network device or the second terminal device.

The network equipment can select the final CUE from one or more potential CUEs for the TUE, and the TUE itself can also select the final CUE from the potential one or more CUEs. Therefore, in step S206, the comprehensive channel quality parameter determined by the first terminal device may be sent to the network device, or may be sent to the second terminal device.

It can also be understood that for each potential CUE, taking the first terminal device as an example, the network device can decide whether the first terminal device can serve as the CUE of the TUE, or the TUE can decide whether the first terminal device can serve as its own CUE. Therefore, the network device may send the second indication information to each potential CUE, in which the second indication information indicates whether to send the comprehensive channel quality parameter to the network device or the TUE.

For example, if the network equipment is responsible for deciding whether each potential CUE can be the CUE of the TUE, then each potential CUE can send comprehensive channel quality parameters to the network equipment, and the network equipment can then send comprehensive channel quality parameters to the network equipment according to the comprehensive channel quality parameters of each potential CUE. And the number of CUEs that needs to be determined, and one or more CUEs are selected from each potential CUE. If the larger the value of the comprehensive channel quality parameter, the better the channel quality between the potential CUE and the network equipment and TUE, and the network equipment needs to select n final CUEs, then the network equipment can select a comprehensive one from each potential CUE The first n UEs with larger channel quality parameters serve as the final CUE.

Refer to FIG. 4, which is an example of a cooperative transmission process when the first reference signal is CSI-RS and the second reference signal is SL CSI-RS. In this example, the network device may configure the CSI-RS resource for the first terminal device, and the first terminal device calculates the functional relationship of the integrated channel quality parameter. The network device may also configure resources for sending SL CSI-RS for the second terminal device. Furthermore, the network device sends the CSI-RS to the first terminal device, the second terminal device sends the SL CSI-RS to the first terminal device, and the first terminal device determines and sends the comprehensive channel quality to the network device according to the functional relationship configured by the network device parameter.

Refer to FIG. 5, which is an example of the cooperative transmission process when the first reference signal is CSI-RS and the second reference signal is SRS. In this example, the network device may configure SRS for the second terminal device, the network device may configure CSI-RS for the first terminal device, configure the function of the comprehensive channel quality parameter for the first terminal device, and send the first terminal device to the first terminal device. 2. The configuration of SRS of terminal equipment. Thus, the first terminal device can detect the SRS sent by the second terminal device to the network device, and determine the channel quality between the first terminal device and the second terminal device according to the detected SRS sent by the second terminal device. Furthermore, the network device sends a CSI-RS to the first terminal device, the second terminal device sends an SRS to the network device, and the first terminal device listens to the SRS configuration of the second terminal device sent by the network device. SRS, thereby determining and sending comprehensive channel quality parameters to network equipment.

It should be noted that the embodiment of the present application does not specifically limit the order in which the first terminal device receives the first reference signal from the network device and the first terminal device receives the second reference signal from the second terminal device. The first terminal device may first receive and measure the first reference signal to obtain the measured value of the first reference signal, or may first receive and measure the second reference signal to obtain the measured value of the second reference signal.

In a possible design, the first terminal device may also directly send the measured value of the first reference signal and/or the measured value of the second reference signal obtained from step S202 and step S204 to the network device or the second For the terminal device, the network device or the second terminal device determines the comprehensive channel quality parameters by itself in the above-mentioned manner, and then determines the cooperative terminal device of the second terminal device. It can be understood that the second indication information may also be used to indicate whether the first terminal device sends the measured value of the first reference signal and/or the measured value of the second reference signal to the network device or to the second terminal device, so that Reduce the processing load of the first terminal device and improve the efficiency of cooperative transmission.

Using the technical solution provided by the embodiments of this application, the first terminal device can send a comprehensive channel quality parameter to the network device or the second terminal device, and the network device or the second terminal device determines to communicate with the second terminal device according to the comprehensive channel quality parameter. At least one terminal device for cooperative transmission. Since the comprehensive channel quality parameter is determined according to the measured value of the first reference signal sent by the network device and the measured value of the second reference signal sent by the second terminal device, it can consider the relationship between the first terminal device and the network device. The channel quality and the channel quality between the first terminal device and the second terminal device are two factors that determine the cooperative terminal device of the second terminal device, thereby improving the effectiveness of cooperative terminal device selection and enhancing the transmission performance of the second terminal device And reliability.

An embodiment of the present application provides a communication device. Please refer to FIG. 6, which is a schematic structural diagram of a communication device provided in an embodiment of this application. The communication device 600 includes a transceiver module 610 and a processing module 620. The communication device can be used to implement the functions related to the first terminal device or the second terminal device in any of the foregoing method embodiments. For example, the communication device may be a terminal device, such as a handheld terminal device or a vehicle-mounted terminal device; the communication device may be a chip included in the terminal device, or a device including terminal devices, such as various types of vehicles; the communication device may also It may be other combination devices, components, etc., having the above-mentioned terminal device functions. When the communication device is a terminal device, the transceiver module may be a transceiver, which may include an antenna and a radio frequency circuit, etc., and the processing module may be a processor, such as a central processing unit (CPU). When the communication device is a component with the above-mentioned terminal equipment function, the transceiver module may be a radio frequency unit, and the processing module may be a processor. When the communication device is a chip system, the transceiver module may be an input/output interface of the chip system, and the processing module may be a processor of the chip system.

When the communication device is used as the first terminal device to execute the method embodiment shown in FIG. 2, the transceiver module 610 is configured to receive the first reference signal from the network device, obtain the measurement value of the first reference signal, and obtain the measurement value of the first reference signal from the network device. The terminal device receives the second reference signal to obtain the measurement value of the second reference signal; the processing module 620 is configured to perform the operation of determining the integrated channel quality parameter according to the measurement value of the first reference signal and/or the measurement value of the second reference signal operating.

When the communication device is used as the second terminal device to execute the method embodiment shown in FIG. 2, the transceiver module 610 is configured to send the second reference signal to the first terminal device and receive the integrated channel quality sent by the first terminal device. Parameter operation; the processing module 620 is configured to perform an operation of determining whether the first terminal device can be a cooperative terminal device of the second terminal device according to the received comprehensive channel quality parameter.

The processing module 620 involved in the communication device may be implemented by a processor or processor-related circuit components, and the transceiver module 610 may be implemented by a transceiver or transceiver-related circuit components. The operation and/or function of each module in the communication device is to implement the corresponding processes of the methods shown in FIG. 2, FIG. 3, and FIG. 4, respectively. As in FIG. 2, if the communication device is the first terminal device, the transceiver module 610 can be used to perform step S202, step S203, and step S206, and the processing module 610 can be used to perform step S205. For the sake of brevity, I will not list them all here.

Please refer to FIG. 7, which is a schematic diagram of another structure of a communication device provided in an embodiment of this application. The communication device may specifically be a terminal device. It is easy to understand and easy to illustrate. In FIG. 7, the terminal device uses a mobile phone as an example. As shown in FIG. 7, the terminal equipment includes a processor, and may also include a memory. Of course, it may also include a radio frequency circuit, an antenna, and an input/output device. The processor is mainly used to process the communication protocol and communication data, and to control the terminal device, execute the software program, and process the data of the software program. The memory is mainly used to store software programs and data. The radio frequency circuit is mainly used for the conversion of baseband signal and radio frequency signal and the processing of radio frequency signal. The antenna is mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal devices may not have input and output devices.

When data needs to be sent, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal to the outside in the form of electromagnetic waves through the antenna. When data is sent to the terminal device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data. For ease of description, only one memory and processor are shown in FIG. 7. In actual terminal equipment products, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or storage device. The memory may be set independently of the processor, or may be integrated with the processor, which is not limited in the embodiment of the present application.

In the embodiments of the present application, the antenna and radio frequency circuit with the transceiving function can be regarded as the transceiving unit of the terminal device, and the processor with the processing function can be regarded as the processing unit of the terminal device. As shown in FIG. 7, the terminal device includes a transceiver unit 710 and a processing unit 720. The transceiver unit may also be referred to as a transceiver, a transceiver, a transceiver, and so on. The processing unit may also be called a processor, a processing board, a processing module, a processing device, and so on. Optionally, the device for implementing the receiving function in the transceiver unit 710 can be regarded as the receiving unit, and the device for implementing the sending function in the transceiver unit 710 as the sending unit, that is, the transceiver unit 710 includes a receiving unit and a sending unit. The transceiver unit may sometimes be called a transceiver, a transceiver, or a transceiver circuit. The receiving unit may sometimes be called a receiver, receiver, or receiving circuit. The transmitting unit may sometimes be called a transmitter, a transmitter, or a transmitting circuit. It should be understood that the transceiving unit 710 is configured to perform the sending and receiving operations on the terminal device side in the foregoing method embodiment, and the processing unit 720 is configured to perform other operations on the terminal device in the foregoing method embodiment except for the transceiving operation.

The embodiment of the present application also provides another communication device. Please refer to FIG. 8, which is a schematic structural diagram of another communication device provided in an embodiment of the present application. The communication device 800 includes a transceiver module 810 and a processing module 820. The communication device can be used to implement the functions related to network equipment in any of the foregoing method embodiments. For example, the communication device may be a network device or a chip included in the network device, and the communication device may also be other combination devices or components having the functions of the above-mentioned network device. When the communication device is a network device, the transceiver module may be a transceiver, which may include an antenna and a radio frequency circuit, etc., and the processing module may be a processor, such as a central processing unit (CPU). When the communication device is a component with the above-mentioned network device function, the transceiver module may be a radio frequency unit, and the processing module may be a processor. When the communication device is a chip system, the transceiver module may be an input/output interface of the chip system, and the processing module may be a processor of the chip system.

When the communication device is used as a network device and the method embodiment shown in FIG. 2 is executed, the transceiver module 810 is configured to send the second reference signal to the first terminal device and receive the comprehensive channel quality parameter sent by the first terminal device The processing module 820 is used to determine whether the first terminal device can be a cooperative terminal device of the second terminal device according to the received comprehensive channel quality parameters.

It should be understood that the processing module 820 involved in the communication device may be implemented by a processor or processor-related circuit components, and the transceiver module 810 may be implemented by a transceiver or transceiver-related circuit components. The operation and/or function of each module in the communication device is to implement the corresponding processes of the methods shown in FIG. 2, FIG. 3, and FIG. 4, respectively. As shown in Fig. 2, the communication device is used as a network device, and the transceiver module 810 can be used to perform step S201 and step S206. For the sake of brevity, it will not be listed here.

Please refer to FIG. 9 for another schematic structural diagram of another communication device provided in an embodiment of this application. The communication device may specifically be a type of network equipment, such as a base station, for implementing the functions of the network equipment in any of the foregoing method embodiments.

The network device 900 includes: one or more radio frequency units, such as a remote radio unit (RRU) 901 and one or more baseband units (BBU) (also referred to as digital units, digital units, DU)902. The RRU 901 may be called a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc., and it may include at least one antenna 9011 and a radio frequency unit 9012. The RRU 901 part is mainly used for receiving and sending radio frequency signals and converting radio frequency signals and baseband signals. The part 902 of the BBU is mainly used to perform baseband processing and control the base station. The RRU 901 and the BBU 902 may be physically set together, or may be physically separated, that is, a distributed base station.

The BBU 902 is the control center of the base station, and may also be called a processing unit, which is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, and spreading. For example, the BBU (processing unit) 902 may be used to control the base station to execute the operation procedure of the network device in the foregoing method embodiment.

In an example, the BBU 902 may be composed of one or more single boards, and multiple single boards may jointly support a radio access network (such as an LTE network) with a single access indication, or may respectively support different access standards. Wireless access network (such as LTE network, 5G network or other networks). The BBU 902 may also include a memory 9021 and a processor 9022, and the memory 9021 is used to store necessary instructions and data. The processor 9022 is used to control the base station to perform necessary actions, for example, to control the base station to perform the sending operation in the foregoing method embodiment. The memory 9021 and the processor 9022 may serve one or more single boards. In other words, the memory and the processor can be set separately on each board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits can be provided on each board.

An embodiment of the present application also provides a chip system, including: a processor, the processor is coupled with a memory, the memory is used to store a program or instruction, when the program or instruction is executed by the processor, the The chip system implements the method in any of the foregoing method embodiments.

Exemplarily, the chip system may be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), or a system on chip (SoC). It can also be a central processor unit (CPU), a network processor (NP), a digital signal processing circuit (digital signal processor, DSP), or a microcontroller (microcontroller). The controller unit, MCU), may also be a programmable controller (programmable logic device, PLD) or other integrated chips.

It should be understood that each step in the foregoing method embodiments may be completed by an integrated logic circuit of hardware in a processor or instructions in the form of software. The steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.

The embodiment of the present application also provides a computer-readable storage medium, which stores computer-readable instructions, and when the computer reads and executes the computer-readable instructions, the computer is caused to execute any of the foregoing method embodiments Method in.

The embodiments of the present application also provide a computer program product. When the computer reads and executes the computer program product, the computer is caused to execute the method in any of the foregoing method embodiments.

An embodiment of the present application also provides a communication system, which includes a network device and at least one terminal device.

It should be understood that the processor mentioned in the embodiments of this application may be a central processing unit (CPU), or may be other general-purpose processors, digital signal processors (DSP), or application specific integrated circuits ( application specific integrated circuit (ASIC), ready-made programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.

It should also be understood that the memory mentioned in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electronic Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory. The volatile memory may be random access memory (RAM), which is used as an external cache. By way of exemplary but not restrictive description, many forms of RAM are available, such as static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (synchlink DRAM, SLDRAM) ) And direct memory bus random access memory (direct rambus RAM, DR RAM).

It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component, the memory (storage module) is integrated in the processor.

It should be noted that the memories described herein are intended to include, but are not limited to, these and any other suitable types of memories.

It should be understood that in the various embodiments of the present application, the size of the sequence numbers of the above-mentioned processes does not mean the order of execution. The execution order of the processes should be determined by their functions and internal logic, and should not be used in the embodiments of the present invention. The implementation process constitutes any limitation.

A person of ordinary skill in the art may be aware that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the above-described system, device, and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional units in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.

If the function 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 this application essentially or the part that contributes to the existing technology or the 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 Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application. Should be covered within the scope of protection of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims

A cooperative transmission method, characterized in that the method includes:

The first terminal device receives the first reference signal from the network device, and obtains the measured value of the first reference signal;

Receiving, by the first terminal device, a second reference signal from a second terminal device, to obtain a measurement value of the second reference signal;

The first terminal device determines an integrated channel quality parameter according to the measured value of the first reference signal and/or the measured value of the second reference signal, and the integrated channel quality parameter is used to determine the relationship with the second terminal At least one terminal device for cooperative transmission by the device;

The first terminal device sends the comprehensive channel quality parameter to the network device or the second terminal device.
The method according to claim 1, wherein the second reference signal is a side link channel state information reference signal SL CSI-RS; the method further comprises:

Receiving, by the first terminal device, first configuration information or indication information of the first configuration information from the second terminal device, the first configuration information indicating parameters used to transmit the SL CSI-RS;

The first terminal device receiving the second reference signal from the second terminal device includes:

The first terminal device receives the SL CSI-RS according to the first configuration information.
The method according to claim 1 or 2, wherein the first reference signal is a channel state information reference signal CSI-RS; the method further comprises:

Receiving, by the first terminal device, third configuration information or indication information of the third configuration information from the network device, the third configuration information indicating a parameter used to transmit the CSI-RS;

The first terminal device receiving the first reference signal from the network device includes:

The first terminal device receives the CSI-RS according to the third configuration information.
The method according to any one of claims 1 to 3, wherein the method further comprises:

Receiving, by the first terminal device, first indication information from the network device, the first indication information indicating the difference between the transmission power of the first reference signal and the transmission power of the second reference signal;

The first terminal device determining the comprehensive channel quality parameter according to the measurement value of the first reference signal and/or the measurement value of the second reference signal includes:

The first terminal device determines the integrated channel quality parameter according to the measured value of the first reference signal, the measured value of the second reference signal, and the difference value.
The method according to any one of claims 1 to 4, wherein the integrated channel quality parameter is a function of the measured value of the first reference signal and/or the measured value of the second reference signal;

The determining of the comprehensive channel quality parameter by the first terminal device includes:

The first terminal device determines the integrated channel quality parameter according to the measurement value of the first reference signal and/or the measurement value of the second reference signal and the function.
The method according to any one of claims 1 to 5, wherein the measured value is any of reference signal received power (RSRP), received signal strength indicator RSSI, reference signal received quality RSSQ, and channel noise to interference ratio (SINR). One kind.
A cooperative transmission method, characterized in that the method includes:

The network device sends the first reference signal to the first terminal device;

The network device receives a comprehensive channel quality parameter from the first terminal device, where the comprehensive channel quality parameter is a measurement value of the first terminal device according to the first reference signal and/or the second reference signal It is determined that the second reference signal is a reference signal received by the first terminal device from the second terminal device;

The network device determines at least one terminal device for cooperative transmission with the second terminal device according to the comprehensive channel quality parameter.
The method according to claim 7, wherein the second reference signal is a side link channel state information reference signal SL CSI-RS; the method further comprises:

The network device sends first configuration information or indication information of the first configuration information to the second terminal device, where the first configuration information indicates a parameter used to transmit the SL CSI-RS.
The method according to claim 7 or 8, wherein the first reference signal is a channel state information reference signal CSI-RS; the method further comprises:

The network device sends third configuration information or indication information of the third configuration information to the first terminal device, where the third configuration information indicates a parameter for transmitting the CSI-RS.
The method according to any one of claims 7 to 9, wherein the method further comprises:

The network device sends first indication information to the first terminal device, where the first indication information is used to indicate a deviation between the transmission power of the first reference signal and the transmission power of the second reference signal.
The method according to any one of claims 7 to 10, wherein the integrated channel quality parameter is a function of the measured value of the first reference signal and the measured value of the second reference signal.
The method according to any one of claims 7 to 11, wherein the measured value is any of reference signal received power (RSRP), received signal strength indicator RSSI, reference signal received quality RSSQ, and channel noise to interference ratio (SINR). One kind.
A cooperative transmission method, characterized in that the method includes:

The second terminal device sends a second reference signal to the first terminal device;

The second terminal device receives a comprehensive channel quality parameter from the first terminal device, where the comprehensive channel quality parameter is the measurement value of the first terminal device according to the first reference signal and/or the second reference signal If the measurement value is determined, the first reference signal is the reference signal received by the first terminal device from the network device;

The second terminal device determines at least one terminal device for cooperative transmission with the second terminal device according to the comprehensive channel quality parameter.
The method according to claim 13, wherein the second reference signal is a side link channel state information reference signal SL CSI-RS; the method further comprises:

The second terminal device receives first configuration information or indication information of the first configuration information from the network device, where the first configuration information indicates a parameter used to transmit the SL CSI-RS.
The method according to any one of claims 13 or 14, wherein the first reference signal is a channel state information reference signal CSI-RS.
The method according to any one of claims 13 to 15, wherein the integrated channel quality parameter is a function of the measured value of the first reference signal and the measured value of the second reference signal.
The method according to any one of claims 13 to 16, wherein the measured value is any of reference signal received power (RSRP), received signal strength indicator RSSI, reference signal received quality RSSQ, and channel noise to interference ratio (SINR). One kind.
A communication device, characterized in that the device includes:

A transceiver module, configured to receive a first reference signal from a network device to obtain a measurement value of the first reference signal;

The transceiver module is further configured to receive a second reference signal from a second terminal device to obtain a measurement value of the second reference signal;

The processing module is configured to determine an integrated channel quality parameter according to the measured value of the first reference signal and/or the measured value of the second reference signal, and the integrated channel quality parameter is used to determine the relationship with the second terminal device At least one terminal device for cooperative transmission;

The transceiver module is further configured to send the comprehensive channel quality parameter to the network device or the second terminal device.
The apparatus according to claim 18, wherein the second reference signal is a side link channel state information reference signal SL CSI-RS;

The transceiver module is further configured to receive first configuration information or indication information of the first configuration information from the second terminal device, where the first configuration information indicates parameters used to transmit the SL CSI-RS;

Receiving the SL CSI-RS according to the first configuration information.
The apparatus according to claim 18 or 19, wherein the first reference signal is a channel state information reference signal CSI-RS;

The transceiver module is further configured to receive third configuration information or indication information of the third configuration information from the network device, where the third configuration information indicates a parameter used to transmit the CSI-RS;

Receiving the CSI-RS according to the third configuration information.
The device according to any one of claims 18 to 20, wherein the transceiver module is further configured to:

Receiving first indication information from the network device, where the first indication information indicates the difference between the transmission power of the first reference signal and the transmission power of the second reference signal;

The processing module is specifically used for:

The integrated channel quality parameter is determined according to the measured value of the first reference signal, the measured value of the second reference signal, and the difference value.
The apparatus according to any one of claims 18 to 21, wherein the integrated channel quality parameter is a function of a measurement value of the first reference signal and/or a measurement value of the second reference signal;

The processing module is specifically used for:

The first terminal device determines the integrated channel quality parameter according to the measurement value of the first reference signal and/or the measurement value of the second reference signal and the function.
The apparatus according to any one of claims 18 to 22, wherein the measured value is any of reference signal received power (RSRP), received signal strength indicator RSSI, reference signal received quality RSSQ, and channel noise to interference ratio (SINR). One kind.
A communication device, characterized in that the device includes:

A transceiver module, configured to send a first reference signal to the first terminal device;

The transceiver module is further configured to receive a comprehensive channel quality parameter from the first terminal device, where the comprehensive channel quality parameter is a measurement value of the first terminal device according to the first reference signal and/or a second reference Determined by the measured value of the signal, the second reference signal is the reference signal received by the first terminal device from the second terminal device;

The processing module is configured to determine at least one terminal device for cooperative transmission with the second terminal device according to the comprehensive channel quality parameter.
The apparatus according to claim 24, wherein the second reference signal is a side link channel state information reference signal SL CSI-RS;

The transceiver module is also used for:

Sending the first configuration information or the indication information of the first configuration information to the second terminal device, where the first configuration information indicates a parameter used to transmit the SL CSI-RS.
The apparatus according to claim 24 or 25, wherein the first reference signal is a channel state information reference signal CSI-RS;

The transceiver module is also used for:

Sending third configuration information or indication information of the third configuration information to the first terminal device, where the third configuration information indicates a parameter for transmitting the CSI-RS.
The device according to any one of claims 24 to 26, wherein the transceiver module is further configured to:

Sending first indication information to the first terminal device, where the first indication information is used to indicate a deviation between the transmission power of the first reference signal and the transmission power of the second reference signal.
The apparatus according to any one of claims 24 to 27, wherein the integrated channel quality parameter is a function of a measured value of the first reference signal and a measured value of the second reference signal.
The apparatus according to any one of claims 24 to 28, wherein the measured value is any of reference signal received power (RSRP), received signal strength indicator RSSI, reference signal received quality RSSQ, and channel noise to interference ratio (SINR). One kind.
A communication device, characterized in that the device includes:

A transceiver module, configured to send a second reference signal to the first terminal device;

The transceiver module is further configured to receive a comprehensive channel quality parameter from the first terminal device, where the comprehensive channel quality parameter is a measurement value of the first terminal device according to the first reference signal and/or the second reference Determined by the measured value of the signal, the first reference signal is the reference signal received by the first terminal device from the network device;

The processing module is configured to determine at least one terminal device for cooperative transmission with the communication device according to the comprehensive channel quality parameter.
The apparatus according to claim 30, wherein the second reference signal is a side link channel state information reference signal SL CSI-RS;

The transceiver module is also used for:

Receiving first configuration information or indication information of the first configuration information from the network device, where the first configuration information indicates a parameter used to transmit the SL CSI-RS.
The apparatus according to any one of claims 30 or 31, wherein the first reference signal is a channel state information reference signal CSI-RS.
The apparatus according to any one of claims 30 to 32, wherein the integrated channel quality parameter is a function of a measured value of the first reference signal and a measured value of the second reference signal.
The apparatus according to any one of claims 30 to 33, wherein the measured value is any of reference signal received power (RSRP), received signal strength indicator RSSI, reference signal received quality RSSQ, and channel noise to interference ratio (SINR). One kind.
A communication device, characterized in that the device includes at least one processor, and the at least one processor is coupled with at least one memory:

The at least one processor is configured to execute a computer program or instruction stored in the at least one memory, so that the device executes the method according to any one of claims 1 to 6, or executes the method as claimed in claim 7. The method according to any one of claims 13 to 17, or the method according to any one of claims 13 to 17.
A computer-readable storage medium, characterized in that, a computer program or instruction is stored in the computer-readable storage medium, and when the computer reads and executes the computer program or instruction, the computer executes as claimed in claims 1 to 6 The method according to any one of claims 7 to 12, or the method according to any one of claims 13 to 17.