Power control method and communication device

Abstract

The embodiment of the invention provides a power control method and a communication device, which are used for realizing power control when UE (User Equipment) sends the same data through a direct link and a non-direct link at the same time. In the method, a first terminal device receives a first power allocation parameter from a network device, first transmitting power and second transmitting power are determined according to the first power allocation parameter, and the sum of the first transmitting power and the second transmitting power is smaller than or equal to the maximum transmitting power of the first terminal device. The first link is a link between the first terminal device and the network device, and the second link is a link between the first terminal device and the second terminal device; the first information is sent on the first link by adopting the first transmitting power, the first information is sent on the second link by adopting the second transmitting power, and the time domain resource for sending the first information on the first link is the same as the time domain resource for sending the first information on the second link; the second terminal device is used for receiving the first information through the second link and forwarding the first information to the network device.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a power control method and a communication device. Background Art

[0002] With the development of communication technology, the reliability and latency of business transmission have become more challenging, such as communication scenarios such as precise industrial control, robot collaborative control, or sensory interconnection. Therefore, designing a low-latency and high-reliability transmission method is currently a research hotspot.

[0003] In order to meet the requirements of low latency and high reliability, a possible implementation solution is multi-path transmission, that is, using one or more terminal devices (or user equipment (UE)) to assist another one or more UEs in service transmission. The user types in the multi-path transmission scenario can include two categories: remote users (remote UE) and relay users (relay UE). The remote UE can send the same data through a direct link and an indirect link. Figure 1 As shown, the data 1 of the remote UE is transmitted to the network device through the direct link of the remote UE-network device and the indirect link of the remote UE-relayUE-network device. Specifically, the remote UE sends the data 1 to the network device and the relay UE at the same time; the relay UE then processes the received data 1 and forwards it to the network device; in this way, the network device not only receives the data 1 from the remote UE, but also receives the data 1 from the relay UE, that is, the network device can receive two identical data, which can improve the transmission reliability and coverage.

[0004] Currently, there is no corresponding solution for how to perform power control when the remote UE sends the same data through a direct link and an indirect link at the same time. Summary of the invention

[0005] The embodiments of the present application provide a power control method and a communication device, which are used to implement power control when a UE sends the same data through a direct link and an indirect link at the same time.

[0006] In the first aspect, the present application provides a power control method, which can be executed by a first terminal device, or by a component in the first terminal device, without limitation. In the method, the first terminal device receives a first power allocation parameter from a network device, and the first power allocation parameter is used to determine a first transmission power of a first link and a second transmission power of a second link, wherein the first link is a link between the first terminal device and the network device, and the second link is a link between the first terminal device and the second terminal device; the first transmission power and the second transmission power are determined according to the first power allocation parameter, and the sum of the first transmission power and the second transmission power is less than or equal to the maximum transmission power of the first terminal device; the first information is sent on the first link using the first transmission power; the first information is sent on the second link using the second transmission power, wherein the time domain resources occupied by sending the first information on the first link are the same as the time domain resources occupied by sending the first information on the second link, and the second terminal device is used to receive the first information through the second link and send the first information to the network device.

[0007] In the above embodiment, before sending the same information through the first link and the second link at the same time, the first terminal device can respectively determine the first transmission power of the first link and the second transmission power of the second link according to the first power allocation parameter indicated by the network device, thereby realizing power control when the first terminal device sends the same information through the direct link and the indirect link at the same time, which is beneficial to improving the received signal to interference plus noise ratio (SINR) of the receiving side in a multi-path transmission scenario, thereby improving the reliability of link transmission and uplink coverage.

[0008] In a possible implementation, the frequency domain resources occupied by sending the first information on the first link are different from the frequency domain resources occupied by sending the first information on the second link. Alternatively, the frequency domain resources occupied by sending the first information on the first link are the same as the frequency domain resources occupied by sending the first information on the second link.

[0009] Through the above implementation method, for the scenario where the frequency domain resources occupied by sending the first information on the first link are different from the frequency domain resources occupied by sending the first information on the second link, the interference of data transmission between the direct link and the indirect link can be reduced; for the scenario where the frequency domain resources occupied by sending the first information on the first link are the same as the frequency domain resources occupied by sending the first information on the second link, the overhead of air interface resources can be reduced.

[0010] In a possible implementation, the first power allocation parameter may include a first field, or include a second field, or include a first field and a second field. The first field may be used to indicate a priority relationship between the first link and the second link. The second field may be used to indicate a first power scaling factor, or indicate a second power scaling factor, or indicate a first power scaling factor and a second power scaling factor. The first power scaling factor is used to determine a power upper limit value of the first link. The second power scaling factor is used to determine a power upper limit value of the second link. Alternatively, the second field may be used directly to indicate a power upper limit value of the first link, or directly indicate a power upper limit value of the second link, or directly indicate a power upper limit value of the first link and a power upper limit value of the second link.

[0011] Through the above implementation method, the first terminal device can respectively determine the first transmission power of the first link and the second transmission power of the second link based on the priority relationship between the first link and the second link, the power upper limit value of the first link, or one or more of the power upper limit values ​​of the second link.

[0012] In one possible implementation, the first terminal device determines the first transmit power and the second transmit power according to the first power allocation parameter, which can be specifically as follows: the first terminal device determines the third transmit power of the first link and the fourth transmit power of the second link, the third transmit power and the fourth transmit power are determined according to the power control parameters indicated by the network device; and, determines the first transmit power and the second transmit power according to the first power allocation parameter, the third transmit power and the fourth transmit power.

[0013] Through the above implementation method, the first terminal device can determine the third transmission power of the first link and the fourth transmission power of the second link based on the power control parameters indicated by the network device, and then determine the transmission power ultimately adopted by the first link and the transmission power ultimately adopted by the second link based on the first power allocation parameters, the third transmission power and the fourth transmission power indicated by the network device.

[0014] In one example, if the first power allocation parameter includes a first field, the first field can be used to indicate the priority relationship between the first link and the second link, then the first terminal device determines the first transmit power and the second transmit power according to the first power allocation parameter, the third transmit power, and the fourth transmit power. Specifically, the first terminal device determines the first transmit power and the second transmit power according to the priority relationship, the third transmit power, and the fourth transmit power. Wherein:

[0015] The priority relationship is that the priority of the first link is higher than the priority of the second link, and the sum of the third transmission power and the fourth transmission power is greater than the maximum transmission power of the first terminal device, the first transmission power is the third transmission power, and the second transmission power is less than the fourth transmission power.

[0016] Alternatively, the priority relationship is that the priority of the first link is lower than the priority of the second link, and the sum of the third transmission power and the fourth transmission power is greater than the maximum transmission power of the first terminal device, the first transmission power is less than the third transmission power, and the second transmission power is the fourth transmission power.

[0017] Alternatively, the priority relationship is that the priority of the first link is higher than the priority of the second link, and the first transmission power and the second transmission power are both half of the third transmission power.

[0018] Alternatively, the priority relationship is that the priority of the first link is lower than the priority of the second link, and the first transmission power and the second transmission power are both half of the fourth transmission power.

[0019] Through the above example, the first terminal device can reasonably and flexibly allocate the transmission power of the first link and the second link according to the priority relationship between the first link and the second link, which is beneficial to improving the SINR received by the receiving end through the joint reception of the first link and the second link, thereby improving the reliability of data transmission and uplink coverage.

[0020] Optionally, the first field is used to indicate the priority relationship between the first link and the second link, which can be specifically: the value of the first field is the first value, the first field is used to indicate that the priority of the first link is higher than the priority of the second link, the value of the first field is the second value, the first field is used to indicate that the priority of the first link is lower than the priority of the second link; or, the first field is used to indicate the priority of the first link and the priority of the second link respectively. The first field can use a variety of implementation methods to indicate the priority relationship between the first link and the second link, and the implementation method is flexible. The first field uses two values ​​to jointly indicate the priority relationship between the first link and the second link. Compared with indicating the priority of the first link and the priority of the second link separately, fewer bits can be used to implement the indication of the priority relationship between the first link and the second link, thereby reducing the indication overhead.

[0021] In another example, if the first power allocation parameter includes a second field, the second field is used to indicate the first power scaling factor and / or the second power scaling factor, the first power scaling factor is used to determine the power upper limit value of the first link, and the second power scaling factor is used to determine the power upper limit value of the second link, then the first terminal device determines the first transmission power and the second transmission power according to the first power allocation parameter, the third transmission power and the fourth transmission power. Specifically, it can be as follows: the first terminal device determines the first transmission power according to the power upper limit value of the first link and the third transmission power; wherein the third transmission power is less than or equal to the power upper limit value of the first link, and the first transmission power is the third transmission power; or, the third transmission power is greater than the power upper limit value of the first link, and the first transmission power is less than or equal to the power upper limit value of the first link; and, the second transmission power is determined according to the power upper limit value and the fourth transmission power of the second link; wherein the fourth transmission power is less than or equal to the power upper limit value of the second link, and the second transmission power is the fourth transmission power; or, the fourth transmission power is greater than the power upper limit value of the second link, and the second transmission power is less than or equal to the power upper limit value of the second link.

[0022] Through the above example, the first terminal device determines the first transmission power according to the power upper limit value of the first link and the third transmission power, so that the transmission power finally adopted by the first link does not exceed its own power upper limit value. Similarly, the first terminal device determines the second transmission power according to the power upper limit value of the second link and the fourth transmission power, so that the transmission power finally adopted by the second link does not exceed its own power upper limit value. The power upper limit value can be configured based on the channel quality of the first link and the second link, which is conducive to realizing flexible power control and adjustment of the terminal device in different interference scenarios.

[0023] Optionally, the second field is used to indicate the first power scaling factor and the second power scaling factor, and specifically can be: the second field is used to indicate the first power scaling factor group, and the first power scaling factor group includes the first power scaling factor and the second power scaling factor. The second field indicates the first power scaling factor and the second power scaling factor by indicating the first power scaling factor group. Compared with indicating the first power scaling factor and the second power scaling factor separately, fewer bits are used, which can reduce the indication overhead.

[0024] In a second aspect, the present application provides a power control method, which can be executed by a first terminal device, or by a component in the first terminal device, without limitation. In the method, the first terminal device receives a second power allocation parameter from a network device, and the second power allocation parameter is used to determine a fifth transmission power of a first link, wherein the first link is a link between the first terminal device and the network device; the fifth transmission power is determined according to the second power allocation parameter, and the fifth transmission power is less than or equal to the maximum transmission power of the first terminal device; the second information is sent using the fifth transmission power, and the second information is transmitted to the network device through the first link and the second link respectively, the second link is a link between the first terminal device and the second terminal device, and the second terminal device is used to receive the second information through the second link and send the second information to the network device.

[0025] In the above embodiment, before sending the same information through the first link and the second link at the same time, the first terminal device can determine the fifth transmission power of the first link according to the second power allocation parameter indicated by the network device, and use the fifth transmission power to send the second information. Since the second terminal device can receive the second information through the second link and forward it to the network device, the second information can be transmitted to the network device through the first link and the second link respectively. Therefore, power control is implemented when the first terminal device sends the same information through the direct link and the indirect link at the same time, which is beneficial to improving the SINR of the receiving side in the multi-path transmission scenario, thereby improving the reliability of link transmission and uplink coverage.

[0026] In a possible implementation, the second power allocation parameter includes a third field, and the third field is used to indicate the priority relationship between the first link and the second link, so that the first terminal device can determine the fifth transmission power according to the priority relationship between the first link and the second link.

[0027] In a possible implementation, if the second power allocation parameter includes a third field, and the third field is used to indicate the priority relationship between the first link and the second link, then the first terminal device determines the fifth transmit power according to the second power allocation parameter, which can be specifically:

[0028] The priority relationship is that the priority of the first link is higher than the priority of the second link, and the first terminal device determines the fifth transmission power according to the path loss of the first link.

[0029] Alternatively, the priority relationship is that the priority of the first link is lower than the priority of the second link, and the first terminal device determines the fifth transmission power according to the path loss of the second link.

[0030] Alternatively, the priority relationship is that the priority of the first link is the same as the priority of the second link, and the first terminal device determines the fifth transmission power according to the path loss of the first link and the path loss of the second link.

[0031] Through the above implementation method, the first terminal device can determine the fifth transmission power according to the path loss of the high-priority link, which can meet the transmission power of the high-priority link, which is beneficial to improving the SINR received by the receiving end through the first link and the second link, thereby improving the reliability of data transmission and uplink coverage.

[0032] In a possible implementation, the third field is used to indicate the priority relationship between the first link and the second link, which can be: the value of the third field is a third value, the third field is used to indicate that the priority of the first link is higher than the priority of the second link, the value of the third field is a fourth value, the third field is used to indicate that the priority of the first link is lower than the priority of the second link, the value of the third field is a fifth value, the third field is used to indicate that the priority of the first link is the same as the priority of the second link; or, the third field is used to indicate the priority of the first link and the priority of the second link respectively. The third field can use a variety of implementation methods to indicate the priority relationship between the first link and the second link, and the implementation method is flexible. The third field jointly indicates the priority relationship between the first link and the second link by two or three values. Compared with indicating the priority of the first link and the priority of the second link separately, fewer bits can be used to implement the indication of the priority relationship between the first link and the second link, thereby reducing the indication overhead.

[0033] In a third aspect, the present application provides a power control method, which can be executed by a network device or by a component in the network device without limitation. In the method, the network device sends a first power allocation parameter to a first terminal device, and the first power allocation parameter is used to determine a first transmission power of a first link and a second transmission power of a second link, wherein the first link is a link between the first terminal device and the network device, and the second link is a link between the first terminal device and the second terminal device, and the sum of the first transmission power and the second transmission power is less than or equal to the maximum transmission power of the first terminal device; receiving first information sent by the first terminal device on the first link using the first transmission power; receiving first information sent by the first terminal device on the second link using the second transmission power, wherein the time domain resources occupied by sending the first information on the first link are the same as the time domain resources occupied by sending the first information on the second link, and the second terminal device is used to receive the first information through the second link and send the first information to the network device.

[0034] In a possible implementation, the first power allocation parameter includes a first field, and / or a second field. The first field is used to indicate the priority relationship between the first link and the second link. The second field is used to indicate a first power proportional factor and / or a second power proportional factor, wherein the first power proportional factor is used to determine the power upper limit value of the first link, and the second power proportional factor is used to determine the power upper limit value of the second link. Alternatively, the second field can be used directly to indicate the power upper limit value of the first link, or to indicate the power upper limit value of the second link, or to directly indicate the power upper limit value of the first link and the power upper limit value of the second link.

[0035] In a possible implementation manner, the second field is used to indicate the first power scaling factor and the second power scaling factor. Specifically, the second field is used to indicate a first power scaling factor group, and the first power scaling factor group includes the first power scaling factor and the second power scaling factor.

[0036] In one possible implementation, the first field is used to indicate the priority relationship between the first link and the second link, which can be: the value of the first field is a first value, and the first field is used to indicate that the priority of the first link is higher than the priority of the second link; the value of the first field is a second value, and the first field is used to indicate that the priority of the first link is lower than the priority of the second link; or, the first field is used to indicate the priority of the first link and the priority of the second link, respectively.

[0037] For the technical effects that can be achieved by any possible implementation method of the third aspect mentioned above, please refer to the technical effects that can be achieved by any possible implementation method of the first aspect mentioned above, and no further details will be given.

[0038] In a fourth aspect, the present application provides a power control method, which can be executed by a network device or by a component in the network device without limitation. In the method, the network device sends a second power allocation parameter to a first terminal device, and the second power allocation parameter is used to determine the fifth transmission power of the first link, wherein the first link is a link between the first terminal device and the network device, and the fifth transmission power is less than or equal to the maximum transmission power of the first terminal device; receives second information from the first terminal device, the second information is information that the first terminal device uses the fifth transmission power and is transmitted to the network device through the first link and the second link respectively, and the second link is a link between the first terminal device and the second terminal device; receives second information from the second terminal device, and the second terminal device is used to receive the second information through the second link and send the second information to the network device.

[0039] In a possible implementation manner, the second power allocation parameter includes a third field, and the third field is used to indicate a priority relationship between the first link and the second link.

[0040] In a possible implementation, the third field is used to indicate the priority relationship between the first link and the second link, which can be specifically: the value of the third field is a third value, and the third field is used to indicate that the priority of the first link is higher than the priority of the second link; the value of the third field is a fourth value, and the third field is used to indicate that the priority of the first link is lower than the priority of the second link; the value of the third field is a fifth value, and the third field is used to indicate that the priority of the first link is the same as the priority of the second link; or, the third field is used to indicate the priority of the first link and the priority of the second link, respectively.

[0041] For the technical effects that can be achieved by any possible implementation method of the fourth aspect mentioned above, please refer to the technical effects that can be achieved by any possible implementation method of the second aspect mentioned above, and no further details will be given.

[0042] In a fifth aspect, the present application provides a communication device. The communication device is used to execute the method described in the first aspect or the second aspect and any possible implementation thereof. The communication device is, for example, a first terminal device, or a functional module in the first terminal device, such as a baseband device or a chip system.

[0043] In a possible implementation, the communication device includes a baseband device and a radio frequency device.

[0044] In another possible implementation, the communication device includes a processing module (sometimes also referred to as a processing unit) and a transceiver module (sometimes also referred to as a transceiver unit). The transceiver module can implement a sending function and a receiving function. When the transceiver module implements the sending function, it can be called a sending module (sometimes also referred to as a sending unit), and when the transceiver module implements the receiving function, it can be called a receiving module (sometimes also referred to as a receiving unit). The sending module and the receiving module can be the same functional module, which is called a transceiver module, and the functional module can implement a sending function and a receiving function; or, the sending module and the receiving module can be different functional modules, and the transceiver module is a general term for these functional modules.

[0045] In a sixth aspect, the present application provides a communication device. The communication device is used to execute the method described in the third aspect or the fourth aspect and any possible implementation thereof. The communication device is, for example, a network device, or a functional module in a network device, such as a baseband device or a chip system.

[0046] In a possible implementation, the communication device includes a baseband device and a radio frequency device.

[0047] In another possible implementation, the communication device includes a processing module (sometimes also referred to as a processing unit) and a transceiver module (sometimes also referred to as a transceiver unit). The transceiver module can implement a sending function and a receiving function. When the transceiver module implements the sending function, it can be called a sending module (sometimes also referred to as a sending unit), and when the transceiver module implements the receiving function, it can be called a receiving module (sometimes also referred to as a receiving unit). The sending module and the receiving module can be the same functional module, which is called a transceiver module, and the functional module can implement a sending function and a receiving function; or, the sending module and the receiving module can be different functional modules, and the transceiver module is a general term for these functional modules.

[0048] In a seventh aspect, the present application further provides a communication device. The communication device may include one or more processors. Optionally, the communication device may also include a memory. The memory is used to store one or more computer programs or instructions. The one or more processors are used to execute the one or more computer programs or instructions stored in the memory, so that the communication device performs the method described in the first aspect or the second aspect and any possible implementation thereof.

[0049] In an eighth aspect, the present application further provides a communication device. The communication device may include one or more processors. Optionally, the communication device may also include a memory. The memory is used to store one or more computer programs or instructions. The one or more processors are used to execute the one or more computer programs or instructions stored in the memory, so that the communication device performs the method described in the third aspect or the fourth aspect and any possible implementation thereof.

[0050] In a ninth aspect, the present application further provides a communication system, wherein the communication system comprises one or more of the following: the communication device described in the fifth aspect, or the communication device described in the sixth aspect.

[0051] In a possible implementation, the communication system may further include a second terminal device, which is used to obtain information of the communication device described in the fifth aspect and send the information to the communication device described in the sixth aspect.

[0052] In the tenth aspect, the present application also provides a computer-readable storage medium, which is used to store computer programs or instructions. When the computer-readable storage medium is executed, the method described in the above-mentioned first to fourth aspects and any possible implementation method thereof is implemented.

[0053] In an eleventh aspect, the present application also provides a computer program product comprising instructions, which, when executed on a computer, enables the methods described in the above-mentioned first to fourth aspects and any possible implementation method thereof to be implemented.

[0054] In the twelfth aspect, the present application also provides a chip, which is coupled to a memory and is used to read and execute program instructions in the memory, so that the device where the chip is located implements the method described in the above-mentioned first to fourth aspects and any possible implementation method thereof.

[0055] For the technical effects that can be achieved by the above-mentioned fifth to twelfth aspects and any possible implementation methods thereof, please refer to the technical effects that can be achieved by the above-mentioned first to fourth aspects and any possible implementation methods thereof, and no repetition will be given. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 A schematic diagram of data transmission in a UE-assisted transmission scenario;

[0057] Figure 2 A schematic diagram of a network architecture of a communication system;

[0058] Figure 3 A schematic diagram of an inter-frequency transmission scenario;

[0059] Figure 4 A schematic diagram of a co-frequency transmission scenario;

[0060] Figure 5 A schematic diagram of a transmission scenario in which a PC5 interface and a Uu interface share spectrum;

[0061] Figure 6 A schematic diagram of a power control method provided in an embodiment of the present application;

[0062] Figure 7 A schematic diagram of a flow chart of another power control method provided in an embodiment of the present application;

[0063] Figure 8 A schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0064] Fig. 9 A schematic diagram of the structure of another communication device provided in an embodiment of the present application;

[0065] Fig.10 A schematic diagram of the structure of another communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0066] In order to make the purpose, 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.

[0067] In the embodiments of the present application, "multiple" may refer to two or more than two. In view of this, in the embodiments of the present application, "multiple" may also be understood as "at least two". "At least one" may be understood as one or more, for example, one, two or more. For example, "including at least one" means including one, two or more. For example, including at least one of A, B and C, then A, B, C, A and B, A and C, B and C, or A, B and C may be included. "And / or" describes the association relationship of associated objects. Specifically, there may be three relationships. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / ", unless otherwise specified, generally indicates that the previously associated objects are in an "or" relationship.

[0068] In addition, the terms "system" and "network" in the embodiments of the present application may be used interchangeably, and "according to" and "based on" may be used interchangeably.

[0069] The ordinal numbers such as "first" and "second" mentioned in the embodiments of the present application are generally used to distinguish different objects, and are not used to limit the order, timing, priority or importance of multiple objects. For example, the first terminal device and the second terminal device in the embodiments of the present application are used to distinguish two terminal devices, and do not limit the priority or importance of the two terminal devices.

[0070] The embodiments of the present application will be presented around a system including multiple devices, components, modules, etc. It should be understood that the system may include other devices, components, modules, etc. not mentioned, or may only include some of the devices, components, or modules, etc. mentioned in the embodiments.

[0071] The following first introduces a communication system to which the embodiments of the present application are applicable.

[0072] The network architecture and application scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. A person of ordinary skill in the art can appreciate that with the evolution of the network architecture and the emergence of new application scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0073] The technical solutions of the embodiments of the present application can be applied to various communication systems, for example, universal mobile telecommunications system (UMTS), wireless local area network (WLAN), short-range wireless communication system (such as sidelink, wireless fidelity (Wi-Fi), Bluetooth and other systems), wired network, vehicle to everything (V2X) communication system, device-to-device (D2D) communication system, Internet of Vehicles communication system, third generation (3G) communication system, fourth generation (4G) mobile communication system (such as long term evolution (LTE) system), LTE frequency division duplex (FDD) system, LTE time division duplex (TDD) system, worldwide interoperability for microwave access (WiMAX) communication system, fifth generation (5G) mobile communication system (such as new radio (NR) system), future communication system (such as sixth generation (6G) system). generation, 6G) mobile communication system), or other similar communication systems, etc., are not limited. Figure 2 The communication system shown is described as an example. When the technical solutions of the embodiments of the present application are applied to other communication systems, the devices, components, modules, etc. in the embodiments can be replaced with corresponding devices, components, modules in other communication systems without limitation.

[0074] Figure 2 A schematic diagram of the architecture of a communication system applicable to an embodiment of the present application is shown, wherein the architecture of the communication system includes a network device and at least two terminal devices (eg Figure 2 The network device can send downlink data to the terminal device, and the terminal device can send uplink data to the network device. The terminal devices can aggregate transmission (or cooperative transmission), such as Figure 2 The terminal device 3 and the terminal device 4 can perform aggregate transmission (or assisted transmission).

[0075] The above network equipment, which can also be called a network device, is used to receive an uplink signal from a terminal device or send a downlink signal to a terminal device. The network equipment can be an access network device, or a device with a wireless transceiver function or a chip that can be set in the access network device. The access network device can include but is not limited to: a base station (generation node B, gNB), a radio network controller (radio network controller, RNC), a node B (Node B, NB), a base station controller (base station controller, BSC), a base transceiver station (base transceiver station, BTS), a home base station (for example, home evolved NodeB, or home Node B, HNB), a baseband unit (baseband unit, BBU), an access point (access point, AP) in a wireless fidelity (wireless fidelity, Wi-Fi) system, a wireless relay node, a wireless backhaul node, a transmission point (transmission and reception point, TRP or transmission point, TP), etc. It can also be a network node constituting a gNB or a transmission point, such as a baseband unit (BBU), or a distributed unit (DU), etc.

[0076] In some deployments, the gNB may include a centralized unit (CU) and a DU. The gNB may also include a radio unit (RU). The CU implements some functions of the gNB, and the DU implements some functions of the gNB, for example, the CU implements the functions of the radio resource control (RRC) and packet data convergence protocol (PDCP) layers, and the DU implements the functions of the radio link control (RLC), media access control (MAC) and physical (PHY) layers. Since the information of the RRC layer will eventually become the information of the PHY layer, or be converted from the information of the PHY layer, under this architecture, high-level signaling, such as RRC layer signaling or PHCP layer signaling, can also be considered to be sent by the DU, or by the DU+RU. It can be understood that the access network device can be a CU node, a DU node, or a device including a CU node and a DU node. In addition, the CU can be divided into a network device in the access network RAN, and the CU can also be divided into a network device in the core network CN, without limitation.

[0077] The network equipment may also include core network equipment, such as access and mobility management function (AMF). Since the embodiments of the present application mainly involve access network, unless otherwise specified, the network equipment described in the following text refers to access network equipment. In the following text, the network equipment and / or access network equipment may be represented by base station.

[0078] In the embodiment of the present application, the device for realizing the function of the network device may be a network device, or may be a device capable of supporting the network device to realize the function, such as a chip system, which may be installed in the network device. In the technical solution provided in the embodiment of the present application, the technical solution provided in the embodiment of the present application is described by taking the device for realizing the function of the network device as an example that the network device is used as the device.

[0079] The above-mentioned terminal equipment, which can also be called terminal device, can be abbreviated as terminal or UE, is an entity on the user side for receiving or transmitting signals, and is used to send uplink signals to network equipment, or receive downlink signals from network equipment, or send sideline signals to other terminal equipment, or receive sideline signals from other terminal equipment. The terminal equipment can also be called access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. For example, the terminal equipment may include a handheld device with wireless connection function, a vehicle-mounted device, etc. At present, terminal devices can be: mobile phones, tablet computers, laptops, PDAs, mobile internet devices (MID), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, XR devices, MR devices, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, or wireless terminals in smart homes, etc.

[0080] The terminal device may also be a D2D terminal device, a V2X communication terminal device, an intelligent vehicle, a vehicle-to-vehicle system (or a vehicle networking system) (telematics box, TBOX), a machine-to-machine / machine-type communication (machine-to-machine / machine-type communications, M2M / MTC) terminal device, or an Internet of Things (IoT) terminal device. For example, the terminal device may be a vehicle, ship, or aircraft, or a terminal-type roadside unit, or a communication module or chip built into a vehicle or roadside unit. For example, the terminal device may be a vehicle-mounted module. The terminal device may also be a road side unit (RSU). The various terminal devices introduced above, if located on a vehicle, such as placed in a vehicle or installed in a vehicle, may be considered as vehicle-mounted terminal devices, and the vehicle-mounted terminal device may also be called an onboard unit (OBU).

[0081] As an example but not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable devices may also be referred to as wearable smart devices or smart wearable devices, etc., which are a general term for the application of wearable technology to intelligently design and develop wearable devices for daily wear, such as glasses, gloves, watches, clothing and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also powerful functions achieved through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include full-featured, large-size, and independent of smartphones to achieve complete or partial functions, such as smart watches or smart glasses, etc., as well as those that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various types of smart bracelets, smart helmets, and smart jewelry for vital sign monitoring.

[0082] The terminal device can also be a sensor for amusement equipment, smart appliances, drones, train detectors or gas stations. Its main functions include collecting data, receiving control information and downlink data from network devices, and sending electromagnetic waves to transmit uplink data to network devices.

[0083] In the embodiment of the present application, the terminal device and the network device support (Uu) interface communication. The terminal devices support direct communication (PC5) interface communication, that is, support transmission through a sidelink (SL).

[0084] For multipath transmission scenarios, user types may include remote users (remote UE) and relay users (relay UE). One or more relay UEs may collaborate with one or more remote UEs to transmit service data, thereby obtaining power gain and multiplexing / diversity gain. Among them, remote UE may also be referred to as a service user (service UE, SUE). Relay UE may also be referred to as a cooperative user (cooperation UE, CUE). In addition, the functions of remote UE and relay UE may be interchangeable. The set of remote UE and relay UE performing multipath transmission at the current scheduling moment may be referred to as an aggregated UE group or a cooperative UE group. This application does not limit the number of remote UEs and relay UEs included in the aggregated UE group. The multipath transmission in the embodiments of the present application may be replaced by cooperative transmission, or aggregated transmission, etc., without limitation.

[0085] In the embodiment of the present application, the device for realizing the function of the terminal device may be the terminal device; or it may be a device capable of supporting the terminal device to realize the function, such as a chip system. The device may be installed in the terminal device or used in combination with the terminal device. In the embodiment of the present application, the chip system may be composed of a chip, or may include a chip and other discrete devices.

[0086] The network equipment and terminal equipment can be fixed or movable. The network equipment and terminal equipment can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on the water surface; they can also be deployed on aircraft, balloons and artificial satellites in the air. The embodiments of the present application do not limit the application scenarios of the network equipment and terminal equipment.

[0087] The following is an introduction to some technical features involved in the embodiments of the present application.

[0088] The purpose of power control for UE is to maximize the throughput of the communication system and minimize the power consumption of UE on the basis of ensuring the transmission performance of UE (such as rate, bit error rate, and delay, etc.). The current protocol implements the standardization of uplink (UL) and sidelink (SL) power control. Among them, UL power control includes: power control of physical uplink shared channel (PUSCH), power control of physical uplink control channel (PUCCH), power control of physical random access channel (PRACH), and power control of sounding reference signal (SRS). SL power control includes power control of physical sidelink shared channel (PSSCH), power control of physical sidelink control channel (PSCCH), and power control of physical sidelink feedback channel (PSFCH).

[0089] The processes of UL power control and SL power control can be simply described as follows: the network device configures the power control parameters to the UE, the UE calculates a transmit power based on the power configuration parameters and its own estimated path loss, and determines the final transmit power based on this transmit power under the constraint of the maximum transmit power.

[0090] If the time domain resources of the UE for UL transmission and SL transmission overlap, that is, the UE performs UL transmission and SL transmission at the same time, the network device can configure the UE with the UL logical channel (logical channel, LCH) priority and the SL logical channel priority; the UE performs power allocation according to the relationship between the UL and SL logical channel priorities to ensure that the sum of the UL transmission power and the SL transmission power does not exceed the maximum transmission power of the UE. For example, if the UL logical channel priority is higher than the SL logical channel priority, then the SL transmission power is reduced, or the SL service transmission is discarded.

[0091] It is worth noting that the scheme for power allocation based on the logical channel priority relationship is only applicable to power control when the UE transmits different data in UL and SL at the same time, and is not applicable to power control when the UE transmits the same data in UL and SL at the same time. This is because when power allocation is based on the logical channel priority relationship, the UE has already determined the logical channel priority of UL and the logical channel priority of SL before the media access control (MAC) layer packet assembly, and the UE can subsequently allocate power according to the logical channel priority relationship between UL and SL. When the UE transmits the same data in UL and SL, the UE needs to copy the data at the MAC layer or the physical (PHY) layer to achieve the transmission of the same data in UL and SL. At this time, the UE has completed the MAC layer packet assembly and the logical channel priority has been fixed. In other words, only one logical channel priority is determined before the MAC layer packet assembly, which is equivalent to the logical channel priority of SL being the same as the logical channel priority of UL. The UE cannot subsequently allocate power according to the logical channel priority relationship between UL and SL.

[0092] In a multipath transmission scenario, the remote UE supports sending the same data to the network device via direct links and indirect links to improve transmission reliability and coverage, such as Figure 1 As shown. The current scheme for power allocation based on logical channel priority relationship is not applicable to power control when the remote UE sends the same data through a direct link and an indirect link at the same time. Therefore, how to perform power control when the remote UE sends the same data through a direct link and an indirect link at the same time is a problem that needs to be solved.

[0093] In view of this, the present application provides a power control method and a communication device to implement power control when a remote UE sends the same data through a direct link and an indirect link at the same time. This is conducive to reasonable power allocation of the remote UE in a multi-path transmission scenario, improving the receiving SINR of the receiving end, thereby improving transmission reliability and uplink coverage.

[0094] The method provided in the embodiment of the present application can be applied to Figure 2 It should be noted that the embodiment of the present application is described by taking the aggregated UE group including the first terminal device and the second terminal device as an example, but does not exclude the case where three or more UEs perform aggregate transmission.

[0095] The first terminal device is a remote UE, which can be Figure 2 The terminal equipment in the communication system shown, or Figure 2 The components in the terminal device in the communication system shown, such as a processor, a chip or a functional module, are not limited. The second terminal device is a relay UE, which can be Figure 2 The terminal equipment in the communication system shown, or Figure 2 The components in the terminal device in the communication system shown, such as a processor, a chip or a functional module, are not limited. The network device can be Figure 2 A network device in the communication system shown, or Figure 2 The components in the network device in the communication system shown, such as a processor, a chip or a functional module, are not limited.

[0096] The second terminal device supports full-duplex mode or half-duplex mode without limitation. The full-duplex mode can be understood as the terminal device can perform a sending operation while performing a receiving operation, that is, sending and receiving information at the same time. The half-duplex mode can be understood as the terminal device either performs a receiving operation or a sending operation, and the switching between the receiving operation and the sending operation requires a delay. For ease of understanding, unless otherwise specified, the following description takes the second terminal device supporting full-duplex mode as an example.

[0097] A direct link refers to a link where data transmission between the first terminal device and the network device does not need to pass through other terminal devices, that is, the first terminal device sends data to the network device through the Uu interface. An indirect link refers to a link where data transmission between the first terminal device and the network device needs to pass through other terminal devices (such as the second terminal device), that is, the first terminal device sends data to the second terminal device through the PC5 interface, and the second terminal device then forwards the data to the network device through the Uu interface.

[0098] The first link, which may also be referred to as a direct link, or a UL link, or a first transmission path, is a link between a first terminal device and a network device. The second link, which may also be referred to as an SL link, or a second transmission path, is a link between a first terminal device and a second terminal device. It should be understood that the second link is a part of a non-direct link.

[0099] The time domain resources involved in the embodiments of the present application may include symbols, slots, mini-slots, partial slots, sub-frames, radio frames, or sensing slots, etc., without limitation. Frequency domain resources may include resource elements (RE), resource blocks (RB), RB sets, subchannels, resource pools, bandwidth parts (BWP), carriers, channels, or interlaces, etc., without limitation.

[0100] The embodiments of the present application are applicable to heterodyne transmission scenarios, homodyne transmission scenarios, and transmission scenarios in which the PC5 interface and the Uu interface share a spectrum.

[0101] In the inter-frequency transmission scenario, when the remote UE transmits the same data in UL and SL at the same time, the UL transmission and SL transmission occupy different carrier frequencies, that is, the UL transmission resources and SL transmission resources overlap in the time domain and are different in the frequency domain, such as Figure 3 As shown in (1) in the figure. Exemplarily, the remote UE simultaneously sends a PUSCH signal to the network device and a PSSCH signal to the relay UE, and the PUSCH signal and the PSSCH signal carry the same data, wherein the frequency domain resources occupied by the PUSCH signal sent to the network device via the UL Uu interface are recorded as frequency 1, and the frequency domain resources occupied by the PSSCH signal sent to the relay UE via the SL PC5 interface are recorded as frequency 2, and the frequency 1 and frequency 2 are different; further, in the embodiment of the present application, after the relay UE receives the data sent by the remote UE on frequency 2, it can perform inter-frequency forwarding, that is, convert the PSSCH signal to frequency 1 and then forward it to the network device, as shown in FIG. Figure 3 It should be noted that after receiving the PUSCH signal and the PSSCH signal, the network device can decode the received PUSCH signal and the PSSCH signal independently, or can also decode them jointly without limitation.

[0102] In the same-frequency transmission scenario, the remote UE transmits data only on the UL, that is, the remote UE uses the UL transmission resources to send data, such as Figure 4As shown in (1) in FIG. 1 . For example, the remote UE sends a PUSCH signal to the network device at frequency 3; further, the relay UE is capable of monitoring the signal sent by the remote UE, that is, it can receive the PUSCH signal sent by the remote UE at frequency 3, does not decode the received PUSCH signal, and forwards the PUSCH signal to the network device at the frequency 3, as shown in FIG. Figure 4 As shown in (2) in .

[0103] In the transmission scenario where the PC5 interface and the Uu interface share spectrum, the UL transmission and SL transmission of the remote UE occupy the same time-frequency resources, that is, the UL transmission and the SL transmission share the time-frequency resources, and the remote UE transmits the UL signal and the SL signal through spatial layered transmission, such as Figure 5 As shown. Exemplarily, the remote UE sends a PUSCH signal to the network device and a PSSCH signal to the relay UE based on the same time-frequency resource, and the PUSCH signal and the PSSCH signal carry the same data; further, in the embodiment of the present application, after the relay UE receives the PSSCH signal sent by the remote UE, it forwards the PSSCH signal to the network device.

[0104] Next, combine Figure 6 and Figure 7 , introduces the power control method provided in an embodiment of the present application.

[0105] Figure 6 FIG. 1 is a flow chart of a power control method provided by an embodiment of the present application. This embodiment is described by taking the inter-frequency transmission scenario and the PC5 interface and Uu interface shared spectrum transmission scenario as examples. Figure 6 As shown, the method may include the following contents.

[0106] S601: The network device sends a first power allocation parameter. For example, the network device sends a first power allocation parameter to a first terminal device.

[0107] Accordingly, the first terminal device receives the first power allocation parameter from the network device.

[0108] Exemplarily, the network device can perform transmission scheduling for the first terminal device. Since this embodiment is a heterodyne transmission scenario or a PC5 interface and a Uu interface shared spectrum transmission scenario, the first terminal device will send the same information through the first link and the second link at the same time, that is, the first terminal device sends data to the network device and the second terminal device at the same time, so the network device needs to perform uplink scheduling and sideline scheduling. When performing uplink scheduling and sideline scheduling, the network device needs to configure power allocation parameters for the first terminal device to ensure that the sum of the transmit power of the first terminal device on the first link (recorded as the first transmit power) and the transmit power on the second link (recorded as the second transmit power) does not exceed the maximum transmit power of the first terminal device. For example, the network device can determine the first power allocation parameter based on the channel quality of the first link, the channel quality of the second link, or the communication environment, and send the first power allocation parameter to the first terminal device. Among them, the channel quality can be determined based on the measured link SINR or interference power and other parameters, without restriction. The communication environment can be understood as whether the first link or the second link in the communication scenario is blocked by obstacles, etc., without restriction.

[0109] The first power allocation parameter may be carried in downlink control information (downlink control indicator, DCI), or carried in MAC signaling, or carried in radio resource control (radio resource control, RRC) signaling, or carried in a combination of the foregoing multiple signalings, without limitation. For ease of understanding, the following description takes the first power allocation parameter carried in DCI as an example.

[0110] The first power allocation parameter can be used to determine the first transmit power of the first link and the second transmit power of the second link. The sum of the first transmit power and the second transmit power is less than or equal to the maximum transmit power of the first terminal device. The first power allocation parameter may include one or more of the following: a priority relationship between the first link and the second link, a first power proportional factor, or a second power proportional factor. In this embodiment, the priority relationship between the first link and the second link may be that the priority of the first link is higher than the priority of the second link, or that the priority of the first link is lower than the priority of the second link. A higher link priority usually indicates that the channel state of the link is better, and the transmission performance of this link needs to be preferentially met. For example, if the priority of the first link is higher than the priority of the second link, it means that the channel state of the first link is better than the channel state of the second link. Therefore, the first terminal device allocates power to the first link and the second link based on the priority relationship to preferentially meet the transmission performance of the link with a good channel state. In another example, the first power allocation parameter may not include the priority relationship between the first link and the second link, but include the priority of the first link and the priority of the second link. That is, the network device sends the priority of the first link and the priority of the second link to the first terminal device; further, the first terminal device can determine the priority relationship between the first link and the second link according to the priority of the first link and the priority of the second link. Unless otherwise specified, the following description takes the priority relationship as an example.

[0111] The first power proportional factor can be used to determine the power upper limit value of the first link. For example, the power upper limit value of the first link is the product of the first power proportional factor and the maximum transmit power of the first terminal device. The second power proportional factor can be used to determine the power upper limit value of the second link. For example, the power upper limit value of the second link is the product of the second power proportional factor and the maximum transmit power of the first terminal device. In another example, the first power allocation parameter may not include the first power proportional factor, but include the power upper limit value of the first link, that is, the network device directly sends the power upper limit value of the first link to the first terminal device. Similarly, the first power allocation parameter may not include the second power proportional factor, but include the power upper limit value of the second link, that is, the network device directly sends the power upper limit value of the second link to the first terminal device. Unless otherwise specified, the power proportional factor is used as an example for description below.

[0112] In a possible implementation, the first power allocation parameter may include a first field, or include a second field, or include a first field and a second field. The first field may be used to indicate a priority relationship between the first link and the second link. The second field may be used to indicate a first power proportional factor, or indicate a second power proportional factor, or indicate a first power proportional factor and a second power proportional factor. The first field and the second field are introduced below.

[0113] (1) The first field

[0114] The first field may be a priority indicator field, which is not limited. The first field may occupy 1 bit, which is not limited.

[0115] In one example, the first field indicates the priority relationship between the first link and the second link through different values. Exemplarily, the value of the first field may include a first value and a second value. If the value of the first field is the first value, then the first field can be used to indicate that the priority of the first link is higher than the priority of the second link, that is, the priority of the second link is lower than the priority of the first link. If the value of the first field is the second value, then the first field can be used to indicate that the priority of the first link is lower than the priority of the second link, that is, the priority of the second link is higher than the priority of the first link.

[0116] In one possible manner, the network device sends a DCI (single DCI, S-DCI) to the first terminal device to implement joint scheduling of UL transmission and SL transmission. The S-DCI can be a new DCI format, or it can reuse an existing DCI format without limitation. The first field can be the SL UL priority indicator field in the S-DCI, and the SLUL priority indicator field occupies 1 bit. If the value of the SL UL priority indicator field is 1, it indicates (or represents) that the priority of the first link is higher than the priority of the second link. If the value of the SL UL priorityindicator field is 0, it indicates (or represents) that the priority of the first link is lower than the priority of the second link. Specifically, the network device can configure the slulpriorityIndicatorDCI-0-1 parameter for the first terminal device through RRC signaling to indicate (or represent) that the DCI has a field indicating the priority indication of simultaneous transmission of SL and UL, that is, there is a SL ULpriority indicator field. Furthermore, the first terminal device detects the SL UL priority indicator field in the DCI according to the slulpriorityIndicatorDCI-0-1 parameter, and determines the priority relationship between the first link and the second link according to the value of the SL UL priorityindicator field. Such a joint indication scheme can save indication overhead (such as the indication overhead of DCI), allowing the first terminal device to monitor fewer search spaces, thereby reducing the complexity of blind decoding of the first terminal device and the power consumption of the first terminal device.

[0117] In another possible implementation, the network device indicates the priority relationship between the first link and the second link only in the DCI for scheduling UL transmission, such as DCI Format 0_1. The first field may be a UL priority indication field (such as a UL priority indicator field) in the DCI for scheduling UL transmission. For example, the UL priority indicator field occupies 1 bit. If the value of the UL priority indicator field is 1, it indicates that the priority of the first link is higher than the priority of the second link; if the value of the UL priority indicator field is 0, it indicates that the priority of the first link is lower than the priority of the second link. Optionally, if the DCI for scheduling UL transmission does not include the UL priority indicator field, the default indication is that the priority of the first link is lower than the priority of the second link. In this way, the scheme of indicating only through the DCI for scheduling UL transmission can save indication overhead, and can be modified based on the existing DCI format, such as multiplexing or adding an indication field, with minor changes to the DCI format.

[0118] In another possible implementation, the network device indicates the priority relationship between the first link and the second link only in the DCI used to schedule SL transmission, such as DCI Format 3_0. The first field may be the SL priority indication field (such as the SL priority indicator field) in the DCI used to schedule SL transmission. For example, the SL priority indicator field occupies 1 bit. If the value of the SL priority indicator field is 1, it indicates that the priority of the first link is lower than the priority of the second link; if the value of the SL priority indicator field is 0, it indicates that the priority of the first link is higher than the priority of the second link. Optionally, if the DCI used to schedule SL transmission does not include the SLpriority indicator field, the default indication is that the priority of the first link is higher than the priority of the second link. In this way, the scheme of indicating only through the DCI used to schedule SL transmission can save indication overhead, and can be modified based on the existing DCI format, such as multiplexing or adding an indication field, with minor changes to the DCI format.

[0119] In another possible implementation, the network device sends a DCI for scheduling UL transmission (such as DCI Format 0_1) and a DCI for scheduling SL transmission (such as DCI Format 3_1) to the first terminal device respectively. The first field is a UL priority indication field (such as a UL priority indicator field) in the DCI for scheduling UL transmission and a SL priority indication field (such as a SL priority indicator field) in the DCI for scheduling SL transmission. For example, the UL priority indicator field occupies 1 bit and the SL priority indicator field occupies 1 bit. If the value of the UL priority indicator field is 1 and the value of the SL priority indicator field is 0, it indicates that the priority of the first link is higher than the priority of the second link; if the value of the UL priority indicator field is 0 and the value of the SL priority indicator field is 1, it indicates that the priority of the first link is lower than the priority of the second link.

[0120] In the above example, the first field directly indicates the priority relationship between the first link and the second link through different values. In another example, the first field can be used to directly indicate the priority of the first link and the priority of the second link respectively. In this way, the first terminal device can determine the priority relationship between the first link and the second link by comparing the priority of the first link and the priority of the second link. That is, the priority relationship between the first link and the second link is indirectly indicated by indicating the priority of the first link and the priority of the second link. Exemplarily, the network device sends a DCI for scheduling UL transmission and a DCI for scheduling SL transmission to the first terminal device respectively. The first field can be the SL priority indication field (such as the SL priority indicator field) in the DCI for scheduling SL transmission. For example, the value of the UL priority indicator field is used to directly indicate the priority of the first link, and the value of the SL priority indicator field is used to directly indicate the priority of the second link. Among them, a high value indicates that the link priority is extremely high, or a low value indicates that the link priority is extremely high, without restriction. Taking the example of a high value indicating extremely high link priority, the value indicated by the UL priority indicator field is 10, and the value indicated by the SL priority indicator field is 5, which means that the priority of the first link is extremely high. Therefore, the first terminal device needs to prioritize the transmission power of the first link to meet its transmission requirements.

[0121] The first field in the first power allocation parameter can be used to indicate the priority relationship between the first link and the second link, so that the first terminal device can prioritize the transmission power of the link with a higher priority, under the premise that the transmission power of the first link and the transmission power of the second link do not exceed the maximum transmission power of the first terminal device, so as to ensure the reliability of the service data transmitted on the link with a higher priority, thereby ensuring the receiving side gain in the multi-path transmission scenario.

[0122] (2) Second field

[0123] In one example, the second field is used to indicate a first power scale factor group, which includes a first power scale factor and a second power scale factor. Among them, the power scale factor group can also be referred to as a group, or a set, etc., without limitation. Exemplarily, the first terminal device obtains at least one power scale factor group, which can be predefined or configured by a network device, without limitation. The at least one power scale factor group includes a first power scale factor group, and each power scale factor group in the at least one power scale factor group includes a power scale factor of a first link and a power scale factor of a second link. The first power scale factor group can be indicated by bit value or bitmap. Taking bit value as an example, a value of the second field corresponds to a power scale factor group in the at least one power scale factor group, that is, a value of the second field is used to indicate a power scale factor group in the at least one power scale factor group, and a power scale factor group in the at least one power scale factor group is indicated by a value of the second field. The number of bits occupied by the second field satisfies rounding up {log2(M)}, where M is the number of the at least one power scale factor group.

[0124] It should be noted that the first terminal device can determine the power scaling factor of the first link and the power scaling factor of the second link from the power scaling factor group according to the position correspondence. The position correspondence can be used to indicate that the first element in the power scaling factor group indicates the power scaling factor of the first link, and the second element indicates the power scaling factor of the second link; or to indicate that the second element in the power scaling factor group indicates the power scaling factor of the first link, and the first element indicates the power scaling factor of the second link. The position correspondence can be predefined or preconfigured without restriction. Take the power scaling factor group denoted as {a, b} as an example, where a is the power scaling factor of the first link, and b is the power scaling factor of the second link; or, a is the power scaling factor of the second link, and b is the power scaling factor of the first link.

[0125] Alternatively, the first terminal device may also adaptively determine the power scaling factor of the first link and the power scaling factor of the second link from the power scaling factor group according to the priority relationship between the first link and the second link. For example, if the priority of the first link is higher than the priority of the second link, the element with a larger value in the power scaling factor group is the power scaling factor of the first link, and the element with a smaller value represents the second power scaling factor of the second link. The same is true in reverse, which will not be repeated.

[0126] In this example, the second field may be included in the S-DCI. Please refer to the aforementioned content for the description of the S-DCI, which will not be repeated here. The second field may be the SL UL priority indicator field in the S-DCI, without limitation. Such a joint indication scheme can save indication overhead (such as the indication overhead of the DCI), allowing the first terminal device to monitor fewer search spaces, thereby reducing the complexity of blind decoding of the first terminal device and the power consumption of the first terminal device. Assuming that the number of at least one power scale factor group is 4, the second field occupies 2 bits, the first element in the predefined power scale factor group is used to indicate the first power scale factor and the second element is used to indicate the second power scale factor, the mapping relationship between the value of the second field and the four power scale factor groups can be: the second field value is 00, which is used to indicate that the first power scale factor of the power scale factor group is 0.2 and the second power scale factor is 0.8; the second field value is 01, which is used to indicate that the first power scale factor of the power scale factor group is 0.3 and the second power scale factor is 0.7; the second field value is 10, which is used to indicate that the first power scale factor of the power scale factor group is 0.4 and the second power scale factor is 0.6; the second field value is 11, which is used to indicate that the first power scale factor of the power scale factor group is 0.5 and the second power scale factor is 0.5, as shown in Table 1. It should be understood that the various data in Table 1 are only an example and are not limited thereto.

[0127] Table 1

[0128]

[0129] In another example, the second field is used to indicate the first power scaling factor, or to indicate the second power scaling factor. In this example, the sum of the first power scaling factor and the second power scaling factor is 1. If the second field is used to indicate the first power scaling factor, the first terminal device can obtain the second power scaling factor by subtracting the first power scaling factor from 1. For example, the network device sends a DCI for scheduling UL transmission to the first terminal device. The second field may be the UL priority indicator field in the DCI for scheduling UL transmission, without limitation, and the second field is used to indicate the first power scaling factor. If the second field is used to indicate the second power scaling factor, the first terminal device can obtain the first power scaling factor by subtracting the second power scaling factor from 1. For example, the network device sends a DCI for scheduling SL transmission to the first terminal device. The second field is included in the DCI for scheduling SL transmission. The second field may be the SL priority indicator field in the DCI for scheduling SL transmission. The second field is used to indicate the second power scaling factor. In this way, the scheme of indicating only through the DCI used to schedule UL transmission or only through the DCI used to schedule SL transmission can save indication overhead, and can be modified based on the existing DCI format, such as multiplexing or adding a new indication field, with minor changes to the DCI format.

[0130] In another example, the second field is used to indicate the first power scaling factor and the second power scaling factor, respectively. For example, the network device may send an S-DCI to the first terminal device, and the second field is a field in the S-DCI, which is used to indicate the first power scaling factor and the second power scaling factor. The first power scaling factor and the second power scaling factor may be indicated by bit value or bit mapping. Taking bit indication as an example, assuming that the second field occupies 3 bits, the mapping relationship between the value of the second field and the first power scale factor and the second power scale factor can be: the second field value is 000, the first power scale factor is 0.2, and the second power scale factor is 0.8; the second field value is 001, the first power scale factor is 0.3, and the second power scale factor is 0.7; the second field value is 010, the first power scale factor is 0.4, and the second power scale factor is 0.6; the second field value is 011, the first power scale factor is 0.5, and the second power scale factor is 0.5; the second field value is 100, the first power scale factor is 0.6, and the second power scale factor is 0.4; the second field value is 101, the first power scale factor is 0.7, and the second power scale factor is 0.3; the second field value is 110, the first power scale factor is 0.8, and the second power scale factor is 0.2, as shown in Table 2. It should be understood that the data in Table 2 are only an example and are not limited to this. Such a joint indication scheme can save indication overhead (such as DCI indication overhead), allowing the first terminal device to monitor fewer search spaces, thereby reducing the complexity of blind decoding of the first terminal device and the power consumption of the first terminal device.

[0131] Table 2

[0132] The value of the second field 000 001 010 011 100 101 110 First power proportional factor 0.2 0.3 0.4 0.5 0.6 0.7 0.8 Second power proportional factor 0.8 0.7 0.6 0.5 0.4 0.3 0.2

[0133] For another example, the network device sends a DCI for scheduling UL transmission and a DCI for scheduling SL transmission to the first terminal device, wherein a field in the DCI for scheduling UL transmission is used to indicate a first power proportionality factor, and a field in the DCI for scheduling SL transmission is used to indicate a second power proportionality factor.

[0134] The second field in the first power allocation parameter can be used to indicate the first power proportional factor and / or the second power proportional factor, so that the first terminal device can flexibly adjust (or control, or allocate) the transmission power of the first link and the transmission power of the second link, under the premise that the transmission power of the first link does not exceed the power upper limit value of the first link and the transmission power of the second link does not exceed the power upper limit value of the second link. For example, power can be flexibly adjusted according to different interference scenarios (such as strong interference in the first link or strong interference in the second link, etc.), which is beneficial to improving the SINR of the receiving end and improving transmission reliability and coverage.

[0135] S602: The first terminal device determines a first transmit power and a second transmit power according to a first power allocation parameter.

[0136] Exemplarily, the first terminal device may determine the initial transmit power of the first link (such as recorded as the third transmit power) and the initial transmit power of the second link (such as recorded as the fourth transmit power), and determine the first transmit power and the second transmit power according to the first power allocation parameter, the third transmit power and the fourth transmit power. The sum of the first transmit power and the second transmit power is less than or equal to the maximum transmit power of the first terminal device. For example, the first terminal device may determine the third transmit power and the fourth transmit power according to the power control parameter. Among them, the power control parameter may be predefined, or may be configured by the network device, or part of it may be predefined and the rest may be configured by the network device, without limitation. For example, the network device sends a power control parameter to the first terminal device; accordingly, the first terminal device receives the power control parameter from the network device.

[0137] The power control parameters may include but are not limited to one or more of the following: expected transmission power P O , path loss compensation coefficient α, reference signal (RS) resource index, PUSCH transmission power adjustment amount, or sideline maximum transmission power, etc.

[0138] For example, assuming that the first terminal device is in the serving cell c, the carrier frequency is f, the uplink bandwidth (bandwidth part, BWP) is b, and the PUSCH transmission opportunity is i, the third transmission power (denoted as P PUSCH,b,f,c (i,j,q d ,l)) can satisfy the following formula (1). Where j is {P O ,α} parameter set. l is the power control adjustment state index, corresponding to different closed-loop power processes, and can be 0 or 1. q d RS resource index.

[0139]

[0140] min{} is the minimum value operation. The various parameters involved in formula (1) are introduced as follows.

[0141] P CMAX,f,c (i) is the maximum transmission power of the first terminal device.

[0142] P O_PUSCH,b,f,c (j) is the open-loop power control parameter, which is determined by the cell-level parameter P O_NOMINAL_PUSCH,f,c (j) and UE-level parameter P O_UE_PUSCH,b,f,c(j), j can take values ​​of {0,1,…,J-1}. O_NOMINAL_PUSCH,f,c (j) represents the transmission power level expected by the network device when the normal demodulation performance requirement of PUSCH is achieved, P O_UE_PUSCH,b,f,c (j) represents the power offset value of the UE relative to the normal scenario, reflecting the impact of factors such as UE service type and channel quality on the PUSCH transmit power.

[0143] is the number of resource blocks (RBs) allocated for PUSCH, and μ is a subcarrier spacing (SCS) related factor.

[0144] α b,f,c (j) is the path loss compensation coefficient, which is used to compensate for the deviation of the downlink path loss measured based on the reference signal relative to the actual uplink path loss. b,f,c (q d ) is the downlink path loss obtained by the first terminal device through reference signal calculation.

[0145] when When K s =0,Δ TF,b,f,c (i) = 0, K s Determined by the RRC parameter deltaMCS. If PUSCH is transmitted on multiple layers, Δ TF，b，f，c (i) = 0. For uplink data transmission, C is the number of code blocks transmitted, K r is the size of code block r, N RE is the number of resource elements occupied by PUSCH,

[0146] f b,f,c (i, l) is the adjustment amount of the PUSCH transmission power of the first terminal device.

[0147] Exemplarily, assuming that the first terminal device is in the serving cell c, the carrier frequency is f, the SL partial bandwidth is b, and the PSSCH transmission opportunity is i, the fourth transmission power (denoted as P PSSCH (i)) can satisfy the following formula (2).

[0148] P PSSCH (i) = min(P CMAX ,P MAX,CBR ,min(P PSSCH,D (i),P PSSCH,SL (i))) Formula (2)

[0149] min{} is the minimum operation. Some parameters involved in formula (2) are introduced as follows.

[0150] P CMAX is the maximum transmission power of the first terminal device, P MAX,CBR is the maximum sideline transmission power of the first terminal device.

[0151] P PSSCH，D (i) is the PSSCH transmit power determined based on the downlink power control parameters. If the parameter dl-P0-PSSCH-PSCCH is configured, it means that DL path loss compensation needs to be considered, then Otherwise, P PSSCH,D (i) = min(P CMAX ,P MAX,CBR ). ]

[0152] P PSSCH，SL (i) is the PSSCH transmit power determined based on the side power control parameters. If the parameter sl-P0-PSSCH-PSCCH is configured, it means that SL path loss compensation needs to be considered, then Otherwise, P PSSCH,SL (i) = min(P CMAX ,P PSSCH,D (i)).

[0153] The parameters involved in formula (2) can correspond to the relevant contents of reference formula (1), which will not be repeated here.

[0154] Next, the specific implementation process of determining the first transmit power and the second transmit power is introduced for the inter-frequency transmission scenario and the PC5 interface and Uu interface shared spectrum transmission scenario.

[0155] (1) Heterogeneous frequency transmission scenario

[0156] As an example, if the first power allocation parameter includes a first field, the first terminal device may determine the first transmission power and the second transmission power according to the priority relationship between the first link and the second link, the third transmission power, and the fourth transmission power. Specifically, the first terminal device determines the third transmission power and the fourth transmission power according to the power control parameter. If the sum of the third transmission power and the fourth transmission power is less than or equal to the maximum transmission power of the first terminal device, the first terminal device determines the first transmission power to be the third transmission power and determines the second transmission power to be the fourth transmission power. If the sum of the third transmission power and the fourth transmission power is greater than the maximum transmission power of the first terminal device, the first terminal device determines the first transmission power and the second transmission power according to the priority relationship between the first link and the second link, the third transmission power, and the fourth transmission power.

[0157] Specifically, the priority relationship between the first link and the second link is that the priority of the first link is higher than the priority of the second link, and the sum of the third transmission power and the fourth transmission power is greater than the maximum transmission power of the first terminal device, then the first transmission power is the third transmission power, and the second transmission power is less than the fourth transmission power. In other words, if the priority of the first link is higher than the priority of the second link, and the sum of the third transmission power and the fourth transmission power is greater than the maximum transmission power of the first terminal device, the first terminal device can determine that the first transmission power is the third transmission power to ensure the transmission power of the link with a high priority, and compress (or reduce, or adjust) the fourth transmission power to obtain the second transmission power, so that the sum of the first transmission power and the second transmission power does not exceed the maximum transmission power of the first terminal device.

[0158] Alternatively, the priority relationship between the first link and the second link is that the priority of the first link is lower than the priority of the second link, and the sum of the third transmission power and the fourth transmission power is greater than the maximum transmission power of the first terminal device, then the first transmission power is less than the third transmission power, and the second transmission power is the fourth transmission power. In other words, if the priority of the first link is lower than the priority of the second link, and the sum of the third transmission power and the fourth transmission power is greater than the maximum transmission power of the first terminal device, the first terminal device can determine that the second transmission power is the fourth transmission power to ensure the transmission power of the link with a high priority, and compress (or reduce, or adjust) the third transmission power to obtain the first transmission power, so that the sum of the first transmission power and the second transmission power does not exceed the maximum transmission power of the first terminal device.

[0159] For another example, if the first power allocation parameter includes the second field, the first terminal device may determine the first transmit power according to the power cap value of the first link and the third transmit power, and determine the second transmit power according to the power cap value of the second link and the fourth transmit power.

[0160] Specifically, if the third transmission power is less than or equal to the power upper limit value of the first link, the first transmission power is the third transmission power; or, if the third transmission power is greater than the power upper limit value of the first link, the first transmission power is less than or equal to the power upper limit value of the first link. In other words, if the third transmission power is less than or equal to the power upper limit value of the first link, the first terminal device can determine that the first transmission power is the third transmission power. Or, if the third transmission power is greater than the power upper limit value of the first link, the first terminal device can compress the third transmission power to obtain the first transmission power, or determine that the first transmission power is equal to the power upper limit value of the first link, so that the first transmission power is less than or equal to the power upper limit value of the first link.

[0161] Exemplarily, the first transmission power (such as denoted as P1) may satisfy the following formula (3).

[0162] P1=min{P PUSCH,b,f,c (i,j,q d ,l),δ1P CMAX} Formula (3)

[0163] Among them, min{} is the minimum value operation. PUSCH,b,f,c (i,j,q d ,l) is the third transmission power, please refer to the relevant content of formula (1) for details. δ1 is the first power proportional factor, P CMAX is the maximum transmission power of the first terminal device, δ1P CMAX is the power upper limit value of the first link.

[0164] If the fourth transmission power is less than or equal to the power upper limit value of the second link, the second transmission power is the fourth transmission power; or, if the fourth transmission power is greater than the power upper limit value of the second link, the second transmission power is less than or equal to the power upper limit value of the second link. In other words, if the fourth transmission power is less than or equal to the power upper limit value of the second link, the first terminal device can determine that the second transmission power is the fourth transmission power. Alternatively, if the fourth transmission power is greater than the power upper limit value of the second link, the first terminal device can compress the fourth transmission power to obtain the second transmission power, or determine that the second transmission power is equal to the power upper limit value of the second link, so that the second transmission power is less than or equal to the power upper limit value of the second link.

[0165] Exemplarily, the second transmit power (such as denoted as P2) may satisfy the following formula (4).

[0166] P2=min{P PSSCH (i),δ2P CMAX} Formula (4)

[0167] Among them, min{} is the minimum value operation. PSSCH (i) is the fourth transmission power, please refer to the relevant content of formula (2) for details. δ2 is the second power proportional factor, P CMAX is the maximum transmit power of the first terminal device, δ2P CMAX is the power upper limit value of the second link.

[0168] It should be noted that the sum of the power upper limit value of the first link and the power upper limit value of the second link can be less than or equal to the maximum transmit power of the first terminal device, or can be greater than the maximum transmit power of the first terminal device, without restriction. In view of the limitation of the maximum transmit power of the first terminal device, when the sum of the power upper limit value of the first link and the power upper limit value of the second link is greater than the maximum transmit power of the first terminal device, and the third transmit power is equal to the power upper limit value of the first link, and the fourth transmit power is equal to the power upper limit value of the second link, the first terminal device can appropriately compress (or reduce, or adjust) the third transmit power and / or the fourth transmit power so that the final sum of the first transmit power and the second transmit power is less than or equal to the maximum transmit power of the first terminal device. That is, the first terminal device must ensure that the sum of the transmit power of the first link and the transmit power of the second link is less than or equal to the maximum transmit power of the first terminal device.

[0169] In another example, if the first power allocation parameter includes a first field and a second field, the first terminal device may determine the first transmit power and the second transmit power based on the priority relationship between the first link and the second link, the power upper limit value of the first link, the power upper limit value of the second link, the third transmit power, and the fourth transmit power.

[0170] Take the priority relationship between the first link and the second link as that the priority of the first link is higher than the priority of the second link, and the sum of the third transmission power and the fourth transmission power is greater than the maximum transmission power of the first terminal device. If the third transmission power is less than or equal to the power upper limit of the first link, and the fourth transmission power is less than or equal to the power upper limit of the second link, the first transmission power is the third transmission power, and the second transmission power is less than the fourth transmission power. Alternatively, if the third transmission power is greater than the power upper limit of the first link, and the fourth transmission power is less than or equal to the power upper limit of the second link, the first transmission power is less than or equal to the power upper limit of the first link, and the second transmission power is less than or equal to the fourth transmission power. Alternatively, if the third transmission power is less than or equal to the power upper limit of the first link, and the fourth transmission power is greater than the power upper limit of the second link, the first transmission power is the third transmission power, and the second transmission power is less than or equal to the power upper limit of the second link. Alternatively, if the third transmission power is greater than the power upper limit of the first link, and the fourth transmission power is greater than the power upper limit of the second link, the first transmission power is less than or equal to the power upper limit of the second link, and the second transmission power is less than or equal to the power upper limit of the second link.

[0171] Take the priority relationship between the first link and the second link as an example that the priority of the first link is lower than the priority of the second link, and the sum of the third transmission power and the fourth transmission power is greater than the maximum transmission power of the first terminal device. If the third transmission power is less than or equal to the power upper limit of the first link, and the fourth transmission power is less than or equal to the power upper limit of the second link, the first transmission power is less than the third transmission power, and the second transmission power is the fourth transmission power. Alternatively, if the third transmission power is greater than the power upper limit of the first link, and the fourth transmission power is less than or equal to the power upper limit of the second link, the first transmission power is less than or equal to the power upper limit of the first link, and the second transmission power is the fourth transmission power. Alternatively, if the third transmission power is less than or equal to the power upper limit of the first link, and the fourth transmission power is greater than the power upper limit of the second link, the first transmission power is less than or equal to the third transmission power, and the second transmission power is less than or equal to the power upper limit of the second link. Alternatively, if the third transmission power is greater than the power upper limit of the first link, and the fourth transmission power is greater than the power upper limit of the second link, the first transmission power is less than or equal to the power upper limit of the second link, and the second transmission power is less than or equal to the power upper limit of the second link.

[0172] (2) Scenario of shared spectrum transmission between PC5 interface and Uu interface

[0173] As an example, if the first power allocation parameter includes a first field, the first terminal device may determine the first transmission power and the second transmission power according to the priority relationship between the first link and the second link, the third transmission power and the fourth transmission power. Since the PC5 interface and the Uu interface share the spectrum, the information sent on the first link and the information sent on the second link occupy the same time-frequency resources, and then the information sent on the first link and the information sent on the second link are layered in the spatial domain, so the first terminal device can use the same transmission power for layered transmission. Specifically, the first terminal device determines the third transmission power and the fourth transmission power according to the power control parameter, and determines the first transmission power and the second transmission power according to the priority relationship between the first link and the second link, the third transmission power and the fourth transmission power.

[0174] Specifically, the priority relationship between the first link and the second link is that the priority of the first link is higher than the priority of the second link, and the first transmission power and the second transmission power are both half of the third transmission power. In other words, if the priority of the first link is higher than the priority of the second link, the first terminal device can determine that the first transmission power and the second transmission power are both half of the third transmission power to ensure the transmission power of the link with higher priority. In this case, the third transmission power is less than or equal to the maximum transmission power of the first terminal device.

[0175] Alternatively, if the priority relationship between the first link and the second link is that the priority of the first link is lower than the priority of the second link, the first transmission power and the second transmission power are both half of the fourth transmission power. In other words, if the priority of the first link is lower than the priority of the second link, the first terminal device may determine that the first transmission power and the second transmission power are both half of the fourth transmission power to ensure the transmission power of the link with a higher priority. In this case, the fourth transmission power is less than or equal to the maximum transmission power of the first terminal device.

[0176] As another example, if the first power allocation parameter includes a first field and a second field, the first terminal device may determine the first transmit power and the second transmit power based on a priority relationship between the first link and the second link, a power upper limit value of the first link, a power upper limit value of the second link, a third transmit power, and a fourth transmit power.

[0177] Take the priority relationship between the first link and the second link as an example that the priority of the first link is higher than the priority of the second link. If half of the third transmit power is less than or equal to the power upper limit of the first link, and less than or equal to the power upper limit of the second link, the first transmit power and the second transmit power are both half of the third transmit power. Alternatively, if half of the third transmit power is greater than the power upper limit of the first link, but less than or equal to the power upper limit of the second link, the first transmit power and the second transmit power are the same, and both are less than or equal to the power upper limit of the first link. Alternatively, if half of the third transmit power is less than or equal to the power upper limit of the first link, but greater than the power upper limit of the second link, the first transmit power and the second transmit power are the same, and both are less than or equal to the power upper limit of the second link. Alternatively, if half of the third transmit power is greater than the power upper limit of the first link, and greater than the power upper limit of the second link, the first transmit power and the second transmit power are the same, both are less than or equal to the power upper limit of the first link, and less than or equal to the power upper limit of the second link.

[0178] Take the priority relationship between the first link and the second link as an example that the priority of the first link is lower than the priority of the second link. If half of the fourth transmit power is less than or equal to the power upper limit of the first link, and less than or equal to the power upper limit of the second link, the first transmit power and the second transmit power are both half of the fourth transmit power. Alternatively, if half of the fourth transmit power is greater than the power upper limit of the first link, but less than or equal to the power upper limit of the second link, the first transmit power and the second transmit power are the same, and both are less than or equal to the power upper limit of the first link. Alternatively, if half of the fourth transmit power is less than or equal to the power upper limit of the first link, but greater than the power upper limit of the second link, the first transmit power and the second transmit power are the same, and both are less than or equal to the power upper limit of the second link. Alternatively, if half of the fourth transmit power is greater than the power upper limit of the first link, and greater than the power upper limit of the second link, the first transmit power and the second transmit power are the same, both are less than or equal to the power upper limit of the first link, and less than or equal to the power upper limit of the second link.

[0179] In the above S602, the first terminal device determines the first transmission power of the first link and the second transmission power of the second link according to the first power allocation parameter from the network device, which means that the first terminal device can perform power control on the first link and the second link according to the first power allocation parameter after MAC layer packetization. Then, when the first terminal device replicates data at the MAC layer or the PHY layer to send the same data on the first link and the second link, the first terminal device can still perform power control according to the first power allocation parameter, so that the first terminal device can achieve power control when sending the same data through the direct link and the indirect link at the same time.

[0180] S603: The first terminal device sends first information on the first link using the first transmission power. For example, the first terminal device sends the first information to the network device on the first link using the first transmission power.

[0181] Accordingly, the network device receives the first information from the first terminal device through the first link.

[0182] The first information may be data information, control information, or a reference signal, etc. The embodiment of the present application does not limit the specific form of the first information.

[0183] S604: The first terminal device sends the first information on the second link using the second transmission power. For example, the first terminal device sends the first information to the second terminal device on the second link using the second transmission power.

[0184] Accordingly, the second terminal device receives the first information from the first terminal device through the second link.

[0185] The time domain resources occupied by sending the first information on the first link are the same as the time domain resources occupied by sending the first information on the second link. In other words, the first terminal device sends the first information via the first link and the second link synchronously (or simultaneously), that is, S603 and S604 are executed synchronously (or simultaneously).

[0186] S605: The second terminal device sends first information to the network device.

[0187] Accordingly, the network device receives the first information from the second terminal device.

[0188] Exemplarily, after receiving the first information on the second link, the second terminal device may not decode the first information, but directly forward it to the network device, or forward it to the network device after power amplification. This is equivalent to forwarding the first information to the network device at the same time as the second terminal device receives the first information on the second link, thereby achieving zero-delay forwarding and saving the forwarding delay of the second terminal device, thereby reducing the transmission delay in the multi-path transmission scenario, which is conducive to achieving low-delay transmission over the air interface. It should be understood that in the hetero-frequency transmission scenario, after receiving the first information, the second terminal device may perform hetero-frequency switching on the first information, and then forward it to the network device after the hetero-frequency switching. The specific implementation process of hetero-frequency switching is not limited in the embodiments of the present application.

[0189] At this point, the network device receives two paths of first information, which can improve the transmission reliability of the first information.

[0190] In the above embodiment, before sending the same information through the first link and the second link at the same time, the first terminal device can respectively determine the first transmission power of the first link and the second transmission power of the second link according to the first power allocation parameter indicated by the network device, thereby realizing power control when the first terminal device sends the same information through the direct link and the indirect link at the same time, which is beneficial to improving the SINR of the receiving side in the multi-path transmission scenario, thereby improving the transmission reliability and uplink coverage.

[0191] Figure 7 FIG. 1 is a flow chart of a power control method provided by an embodiment of the present application. This embodiment is described by taking the same-frequency transmission scenario as an example. Figure 7 As shown, the method may include the following contents.

[0192] S701: The network device sends a second power allocation parameter. For example, the network device sends a second power allocation parameter to a first terminal device.

[0193] Accordingly, the first terminal device receives the second power allocation parameter from the network device.

[0194] Exemplarily, the network device can perform transmission scheduling for the first terminal device. Since this embodiment is a co-frequency transmission scenario, the first terminal device will send information through the first link, so the network device only needs to perform uplink scheduling. Although the first terminal device only sends information through the first link, the second terminal device will monitor the first terminal device to send information, receive the information through the second link, and then forward it to the network device. Therefore, when performing uplink scheduling, the network device needs to configure the second power allocation parameter for the first terminal device to determine that the transmit power of the first terminal device in the first link (recorded as the fifth transmit power) is calculated based on the path loss of the first link, or based on the path loss of the second link, or based on the path loss of the first link and the path loss of the second link, so as to improve the combined SINR and transmission reliability of the receiving side of the direct link and the indirect link. For example, the network device can determine the second power allocation parameter based on the channel quality of the first link, the channel quality of the second link, or the communication environment and other information, and send the second power allocation parameter to the first terminal device. Among them, please refer to the relevant description of S601 for the channel quality and communication environment, which will not be repeated.

[0195] The second power allocation parameter may be carried in DCI, or in MAC signaling, or in RRC signaling, or in a combination of the aforementioned multiple signalings, without limitation. For ease of understanding, the following description takes the second power allocation parameter carried in DCI as an example.

[0196] The second power allocation parameter can be used to determine the fifth transmission power of the first link. The fifth transmission power is less than or equal to the maximum transmission power of the first terminal device. The second power allocation parameter may include a priority relationship between the first link and the second link. In this embodiment, the priority relationship between the first link and the second link may be that the priority of the first link is higher than the priority of the second link, or that the priority of the first link is lower than the priority of the second link, or that the priority of the first link is the same as the priority of the second link. In another example, the first power allocation parameter may not include the priority relationship between the first link and the second link, but include the priority of the first link and the priority of the second link. That is, the network device sends the priority of the first link and the priority of the second link to the first terminal device; further, the first terminal device may determine the priority relationship between the first link and the second link based on the priority of the first link and the priority of the second link.

[0197] In a possible implementation, the first power allocation parameter may include a third field. The third field may be used to indicate a priority relationship between the first link and the second link. The third field may be a priority indicator field, which is not limited. The third field may occupy 1 bit, which is not limited.

[0198] In one example, the third field indicates the priority relationship between the first link and the second link through different values. Exemplarily, the value of the first field may include a third value and a fourth value, or include a third value, a fourth value and a fifth value. If the value of the third field is the third value, then the first field can be used to indicate that the priority of the first link is higher than the priority of the second link, that is, the priority of the first link is lower than the priority of the second link. If the value of the third field is the fourth value, then the first field can be used to indicate that the priority of the first link is lower than the priority of the second link, that is, the priority of the second link is higher than the priority of the first link. If the value of the third field is the fifth value, then the first field can be used to indicate that the priority of the first link is the same as the priority of the second link, that is, the priority of the second link is higher than the priority of the first link. For details, please refer to the relevant description of the first field, which will not be repeated.

[0199] In another example, the third field is used to indicate the priority of the first link and the priority of the second link respectively. For details, please refer to the relevant description of the first field and will not be repeated here.

[0200] S702: The first terminal device determines a fifth transmit power of the first link according to the second power allocation parameter.

[0201] Exemplarily, the first terminal device determines a fifth transmit power of the first link according to a priority relationship between the first link and the second link, wherein the fifth transmit power is less than or equal to a maximum transmit power of the first terminal device.

[0202] Specifically, if the priority relationship between the first link and the second link is that the priority of the first link is higher than the priority of the second link, the first terminal device may determine the fifth transmit power according to the path loss of the first link. For example, the first terminal device determines the fifth transmit power according to the path loss of the first link and the power control parameter. In other words, the first terminal device uses the first link to perform path loss compensation. Exemplarily, the fifth transmit power may be calculated by formula (1).

[0203] Alternatively, if the priority relationship between the first link and the second link is that the priority of the first link is lower than the priority of the second link, the first terminal device may determine the fifth transmit power according to the path loss of the second link. For example, the first terminal device determines the fifth transmit power according to the path loss and power control parameter of the second link. In other words, the first terminal device uses the second link to perform path loss compensation. Exemplarily, the fifth transmit power may be calculated by the following formula (5).

[0204]

[0206] Among them, P5(i,j,q d ,l) is the fifth transmission power, PL SL is the sideways path loss measured by the first terminal device, that is, the path loss of the second link. The parameters of formula (5) can refer to the relevant contents of the above formulas (1) and (2), and will not be repeated here.

[0207] Alternatively, if the priority relationship between the first link and the second link is that the priority of the first link is the same as the priority of the second link, the first terminal device can determine the fifth transmit power according to the path loss of the first link and the path loss of the second link. For example, the first terminal device determines the fifth transmit power according to the path loss of the first link, the path loss of the second link, and the power control parameter. In other words, the first terminal device uses the first link and the second link to perform path loss compensation. Exemplarily, the fifth transmit power can be calculated by the following formula (6).

[0208]

[0209] Among them, P5(i,j,q d ,l) is the fifth transmission power. D (j) is the path loss compensation coefficient of the downlink configured by the network device, PL D is the downlink path loss measured by the first terminal device, that is, the path loss of the first link. SL (j) The path loss compensation coefficient of the side link configured for the network device, PL SL is the sideways path loss measured by the first terminal device, that is, the path loss of the second link. The parameters of formula (6) can refer to the relevant contents of the above formulas (1) and (2), and will not be repeated here.

[0210] For the description of the power control parameters, please refer to the relevant content of S602 and will not be repeated here.

[0211] S703: The first terminal device sends the second information using the fifth transmission power. For example, the first terminal device sends the second information on the first link using the fifth transmission power.

[0212] Accordingly, the network device receives the second information from the first terminal device. For example, the network device receives the second information sent by the first terminal device on the first link using the fifth transmission power. The second terminal device receives the second information via the second link. For example, the network device receives the second information from the first terminal device via the first link.

[0213] The second information may be data information, control information, or a reference signal, etc. The embodiment of the present application does not limit the specific form of the first information.

[0214] Optionally, S703 can be split into S703a and S703b. Figure 7 Take S703a and S703b as an example. In S703a, the first terminal device uses the fifth transmission power to send the second information, and accordingly, the network device receives the second information from the first terminal device on the first link. S703b, the first terminal device uses the fifth transmission power to send the second information, and accordingly, the second terminal device receives the second information on the second link. It is worth noting that S703a and S703b are a process step, that is, for the first terminal device, the first terminal device only needs to use the fifth transmission power to send the second information to the network device through the Uu interface, and the second terminal device can monitor (or detect) the second information based on the configuration information of the network device (such as the time-frequency resources occupied by the second information), so that the second terminal device can receive the second information sent by the first terminal device through the second link. In other words, the second information sent by the first terminal device on the first link is also received by the second terminal device on the second link, and forwarded to the network device by the second terminal device.

[0215] S704: The second terminal device sends second information to the network device.

[0216] Accordingly, the network device receives the second information from the second terminal device.

[0217] The second information is received by the second terminal device on the second link and sent by the second terminal device to the network device. Exemplarily, after receiving the second information, the second terminal device may not decode the second information, but directly forward it to the network device, or forward it to the network device after power amplification. This is equivalent to forwarding the second information to the network device at the same time as the second terminal device receives the second information, thus achieving zero-delay forwarding and saving the forwarding delay of the second terminal device, thereby reducing the transmission delay in the UE-assisted transmission scenario, which is conducive to achieving low-delay transmission over the air interface.

[0218] At this point, the network device receives two paths of second information, which can improve the transmission reliability of the second information.

[0219] In the above embodiment, before sending the same information through the first link and the second link at the same time, the first terminal device can determine the fifth transmission power of the first link according to the second power allocation parameter of the network device, and use the fifth transmission power to send the second information. Since the second terminal device can receive the second information through the second link and forward it to the network device, the second information can be transmitted to the network device through the first link and the second link respectively. Therefore, power control is achieved when the first terminal device sends the same information through the direct link and the indirect link at the same time, which is beneficial to improving the SINR of the receiving side in the multi-path transmission scenario, thereby improving the reliability of link transmission and uplink coverage.

[0220] In the embodiments provided in the present application, the methods provided in the embodiments of the present application are introduced from the perspective of the interaction between the first terminal device and the network device. Among them, the steps performed by the first terminal device can be implemented by different functional entities constituting the first terminal device. The steps performed by the network device can be implemented by different functional entities constituting the network device. In order to implement the various functions in the method provided in the above-mentioned embodiments of the present application, the first terminal device and the network device may include a hardware structure and / or a software module, and the above-mentioned functions are implemented in the form of a hardware structure, a software module, or a hardware structure plus a software module. Whether a certain function of the above-mentioned functions is executed in the form of a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraints of the technical solution.

[0221] The following describes the communication device used to implement the above method in the embodiment of the present application in conjunction with the accompanying drawings. Therefore, the above contents can be used in subsequent embodiments, and repeated contents will not be repeated.

[0222] Figure 8 A schematic diagram of the structure of a communication device 800 is shown. The communication device 800 can implement the functions or steps implemented by the first terminal device or the network device in the above-mentioned various method embodiments.

[0223] In a possible implementation, the communication device 800 may include a processing module 801 and a transceiver module 802. The processing module 801 may be used to execute the steps of any communication device (e.g., a first terminal device, or a network device) in any of the above method embodiments; the transceiver module 802 may be used to receive or send relevant data, information, or messages.

[0224] In another possible implementation, the communication device 800 may include a transceiver module 802, which may be used to execute the steps or methods of any communication device (eg, a first terminal device or a network device) in any of the above method embodiments.

[0225] It should be noted that the above-mentioned units may be independently configured or partially or completely integrated. For example, the transceiver module 802 may include a sending module and a receiving module.

[0226] As an example, the communication device 800 can implement the functions or steps implemented by the first terminal device in any of the above method embodiments.

[0227] For example, the transceiver module 802 is used to receive a first power allocation parameter from a network device, and the first power allocation parameter is used to determine a first transmission power of a first link and a second transmission power of a second link, wherein the first link is a link between a first terminal device and a network device, and the second link is a link between the first terminal device and a second terminal device. The processing module 801 is used to determine a first transmission power and a second transmission power according to the first power allocation parameter, and the sum of the first transmission power and the second transmission power is less than or equal to the maximum transmission power of the first terminal device. The transceiver module 802 is also used to send the first information on the first link using the first transmission power; and send the first information on the second link using the second transmission power, wherein the time domain resources occupied by sending the first information on the first link are the same as the time domain resources occupied by sending the first information on the second link, and the second terminal device is used to receive the first information through the second link and send the first information to the network device.

[0228] In a possible implementation, the frequency domain resources occupied by sending the first information on the first link are different from the frequency domain resources occupied by sending the first information on the second link. Alternatively, the frequency domain resources occupied by sending the first information on the first link are the same as the frequency domain resources occupied by sending the first information on the second link.

[0229] In a possible implementation, the first power allocation parameter may include a first field, or include a second field, or include a first field and a second field. The first field may be used to indicate a priority relationship between the first link and the second link. The second field may be used to indicate a first power scaling factor, or indicate a second power scaling factor, or indicate a first power scaling factor and a second power scaling factor, wherein the first power scaling factor is used to determine a power upper limit value of the first link. The second power scaling factor is used to determine a power upper limit value of the second link. Alternatively, the second field may be used directly to indicate a power upper limit value of the first link, or directly indicate a power upper limit value of the second link, or directly indicate a power upper limit value of the first link and a power upper limit value of the second link.

[0230] In one possible implementation, when the first transmission power and the second transmission power are determined according to the first power allocation parameter, the processing module 801 is specifically used to: determine the third transmission power of the first link and the fourth transmission power of the second link, the third transmission power and the fourth transmission power are determined according to the power control parameters indicated by the network device; and determine the first transmission power and the second transmission power according to the first power allocation parameter, the third transmission power and the fourth transmission power.

[0231] In one example, if the first power allocation parameter includes a first field, the first field can be used to indicate the priority relationship between the first link and the second link. Then, when determining the first transmission power and the second transmission power according to the first power allocation parameter, the third transmission power and the fourth transmission power, the processing module 801 is specifically used to: determine the first transmission power and the second transmission power according to the priority relationship, the third transmission power and the fourth transmission power. Wherein: the priority relationship is that the priority of the first link is higher than the priority of the second link, and the sum of the third transmission power and the fourth transmission power is greater than the maximum transmission power of the first terminal device, the first transmission power is the third transmission power, and the second transmission power is less than the fourth transmission power; or, the priority relationship is that the priority of the first link is lower than the priority of the second link, and the sum of the third transmission power and the fourth transmission power is greater than the maximum transmission power of the first terminal device, the first transmission power is less than the third transmission power, and the second transmission power is the fourth transmission power; or, the priority relationship is that the priority of the first link is higher than the priority of the second link, and the first transmission power and the second transmission power are both half of the third transmission power; or, the priority relationship is that the priority of the first link is lower than the priority of the second link, and the first transmission power and the second transmission power are both half of the fourth transmission power.

[0232] Optionally, the first field is used to indicate the priority relationship between the first link and the second link. Specifically, the value of the first field is the first value, and the first field is used to indicate that the priority of the first link is higher than the priority of the second link; the value of the first field is the second value, and the first field is used to indicate that the priority of the first link is lower than the priority of the second link; or, the first field is used to indicate the priority of the first link and the priority of the second link, respectively.

[0233] In another example, if the first power allocation parameter includes a second field, the second field is used to indicate the first power proportional factor and / or the second power proportional factor, the first power proportional factor is used to determine the power upper limit value of the first link, and the second power proportional factor is used to determine the power upper limit value of the second link, then when the first transmission power and the second transmission power are determined according to the first power allocation parameter, the third transmission power and the fourth transmission power, the processing module 801 is specifically used to: determine the first transmission power according to the power upper limit value of the first link and the third transmission power; wherein the third transmission power is less than or equal to the power upper limit value of the first link, and the first transmission power is the third transmission power; or, the third transmission power is greater than the power upper limit value of the first link, and the first transmission power is less than or equal to the power upper limit value of the first link; and, determine the second transmission power according to the power upper limit value of the second link and the fourth transmission power; wherein the fourth transmission power is less than or equal to the power upper limit value of the second link, and the second transmission power is the fourth transmission power; or, the fourth transmission power is greater than the power upper limit value of the second link, and the second transmission power is less than or equal to the power upper limit value of the second link.

[0234] Optionally, the second field is used to indicate the first power scaling factor and the second power scaling factor and specifically may be: the second field is used to indicate a first power scaling factor group, and the first power scaling factor group includes the first power scaling factor and the second power scaling factor.

[0235] For another example, the transceiver module 802 is used to receive a second power allocation parameter from the network device, and the second power allocation parameter is used to determine the fifth transmission power of the first link, wherein the first link is a link between the first terminal device and the network device. The processing module 801 is used to determine the fifth transmission power according to the second power allocation parameter, and the fifth transmission power is less than or equal to the maximum transmission power of the first terminal device. The transceiver module 802 is also used to send the second information using the fifth transmission power, and the second information is transmitted to the network device through the first link and the second link respectively, the second link is a link between the first terminal device and the second terminal device, and the second terminal device is used to receive the second information through the second link and send the second information to the network device.

[0236] In a possible implementation manner, the second power allocation parameter includes a third field, and the third field is used to indicate a priority relationship between the first link and the second link.

[0237] In one possible implementation, if the second power allocation parameter includes a third field, and the third field is used to indicate the priority relationship between the first link and the second link, then when determining the fifth transmit power according to the second power allocation parameter, the processing module 801 is specifically used to: the priority relationship is that the priority of the first link is higher than the priority of the second link, and the fifth transmit power is determined according to the path loss of the first link; or, the priority relationship is that the priority of the first link is lower than the priority of the second link, and the fifth transmit power is determined according to the path loss of the second link; or, the priority relationship is that the priority of the first link is the same as the priority of the second link, and the fifth transmit power is determined according to the path loss of the first link and the path loss of the second link.

[0238] In a possible implementation, the third field is used to indicate the priority relationship between the first link and the second link, which can be specifically: the value of the third field is a third value, the third field is used to indicate that the priority of the first link is higher than the priority of the second link, the value of the third field is a fourth value, the third field is used to indicate that the priority of the first link is lower than the priority of the second link, the value of the third field is a fifth value, the third field is used to indicate that the priority of the first link is the same as the priority of the second link; or, the third field is used to indicate the priority of the first link and the priority of the second link, respectively.

[0239] As another example, the communication device 800 may implement the functions or steps implemented by the network device in any of the above method embodiments.

[0240] For example, the transceiver module 802 is used to send a first power allocation parameter to a first terminal device, the first power allocation parameter is used to determine a first transmission power of a first link and a second transmission power of a second link, wherein the first link is a link between the first terminal device and a network device, the second link is a link between the first terminal device and the second terminal device, and the sum of the first transmission power and the second transmission power is less than or equal to the maximum transmission power of the first terminal device; receiving first information sent by the first terminal device on the first link using the first transmission power; receiving first information sent by the first terminal device on the second link using the second transmission power, wherein the time domain resources occupied by sending the first information on the first link are the same as the time domain resources occupied by sending the first information on the second link, and the second terminal device is used to receive the first information through the second link and send the first information to the network device.

[0241] In a possible implementation, the first power allocation parameter includes a first field, and / or a second field. The first field is used to indicate the priority relationship between the first link and the second link. The second field is used to indicate a first power proportional factor and / or a second power proportional factor, wherein the first power proportional factor is used to determine the power upper limit value of the first link, and the second power proportional factor is used to determine the power upper limit value of the second link. Alternatively, the second field can be used to directly indicate the power upper limit value of the first link, or directly indicate the power upper limit value of the second link, or directly indicate the power upper limit value of the first link and the power upper limit value of the second link.

[0242] In a possible implementation manner, the second field is used to indicate the first power scaling factor and the second power scaling factor. Specifically, the second field is used to indicate a first power scaling factor group, and the first power scaling factor group includes the first power scaling factor and the second power scaling factor.

[0243] In one possible implementation, the first field is used to indicate the priority relationship between the first link and the second link, which can be: the value of the first field is a first value, and the first field is used to indicate that the priority of the first link is higher than the priority of the second link; the value of the first field is a second value, and the first field is used to indicate that the priority of the first link is lower than the priority of the second link; or, the first field is used to indicate the priority of the first link and the priority of the second link, respectively.

[0244] For another example, the transceiver module 802 is used to send a second power allocation parameter to the first terminal device, the second power allocation parameter is used to determine the fifth transmission power of the first link, wherein the first link is a link between the first terminal device and the network device, and the fifth transmission power is less than or equal to the maximum transmission power of the first terminal device; receive second information from the first terminal device, the second information is information that the first terminal device uses the fifth transmission power and is transmitted to the network device through the first link and the second link respectively, and the second link is a link between the first terminal device and the second terminal device; receive second information from the second terminal device, the second terminal device is used to receive the second information through the second link and send the second information to the network device.

[0245] In a possible implementation manner, the second power allocation parameter includes a third field, and the third field is used to indicate a priority relationship between the first link and the second link.

[0246] In a possible implementation, the third field is used to indicate the priority relationship between the first link and the second link, which can be specifically: the value of the third field is a third value, and the third field is used to indicate that the priority of the first link is higher than the priority of the second link; the value of the third field is a fourth value, and the third field is used to indicate that the priority of the first link is lower than the priority of the second link; the value of the third field is a fifth value, and the third field is used to indicate that the priority of the first link is the same as the priority of the second link; or, the third field is used to indicate the priority of the first link and the priority of the second link, respectively.

[0247] For a more detailed description of the processing module 801 and the transceiver module 802, please refer to Figure 6 or Figure 7 The relevant description in the method embodiment shown in any one of the items is directly obtained and will not be repeated here.

[0248] like Fig. 9 As shown, an embodiment of the present application provides a schematic diagram of the structure of a communication device 900. The communication device 900 may include a processor 920, which is used to implement or support the communication device 900 to implement the function of the first terminal device or the network device in any method embodiment of the present application. For details, please refer to the detailed description in the aforementioned method embodiment, which will not be repeated here. For example, the processor 920 is used to read and execute program instructions through a communication interface so that the communication device 900 implements the corresponding method. The processor 920 may include one or more processors, without limitation.

[0249] Specifically, the communication device 900 can be a first terminal device or a functional module located in the first terminal device, which can implement the function of the first terminal device element in any method embodiment of the present application; or, the communication device 900 can be a network device or a functional module located in the network device, which can implement the function of the network device in any method embodiment of the present application.

[0250] It should be pointed out that the above-mentioned functional modules can be implemented by hardware or by a combination of hardware and software without limitation.

[0251] For example, the communication device 900 may be a chip system, wherein the chip system may be composed of a chip, or may include a chip and other discrete devices, without limitation.

[0252] Optionally, the communication device 900 may further include a memory 930 for storing program instructions and / or data. The memory 930 is coupled to the processor 920. Coupling may be understood as an indirect coupling or communication connection between devices, units or modules, which may be electrical, mechanical or other forms, for information exchange between devices, units or modules. The processor 920 may operate in coordination with the memory 930. The memory 930 may include one or more memories, without limitation.

[0253] Furthermore, the processor 920 is configured to execute program instructions stored in the memory 930 so that the communication device 900 implements a corresponding method.

[0254] Among them, one or more memories in the memory 930 may be included in the processor, and the memory 930 may also exist independently, such as an off-chip memory, through a communication bus ( Fig. 9 The memory 930 and the processor 920 may also be integrated together.

[0255] Optionally, the communication device 900 further includes a communication interface 910 ( Fig. 9 The communication interface 910 is used to communicate with other devices through a transmission medium, so that the device in the communication device 900 can communicate with other devices. Exemplarily, when the communication device is a first terminal device, the other device can be a second terminal device, a network device, etc. The processor 920 can use the communication interface 910 to send and receive data.

[0256] The communication interface 910 may be a transceiver. In hardware implementation, the transceiver may be used to implement the functions of the transceiver module 802 , and the transceiver is integrated in the communication device 900 to form the communication interface 910 .

[0257] It should be noted that the specific connection medium between the communication interface 910, the processor 920 and the memory 930 is not limited in the embodiment of the present application. Fig. 9 In the figure, the memory 930, the processor 920 and the communication interface 910 are connected via the communication bus 940. The connection between other components is only for schematic illustration and is not limited thereto. The communication bus 940 can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Fig. 9 Only one thick line is used in the figure, but it does not mean that there is only one communication bus or one type of communication bus.

[0258] In the embodiment of the present application, the processor 920 may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component. The general-purpose processor may be a microprocessor or any conventional processor, etc. The method disclosed in the embodiment of the present application may be executed by hardware in the processor, or by a combination of hardware and software in the processor.

[0259] In the embodiment of the present application, the memory 930 may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., or a volatile memory (volatile memory), such as a random-access memory (RAM). The memory may also be any other medium for carrying or storing program codes in the form of instructions or data structures and accessible by a computer; or, a circuit or any other device capable of implementing a storage function, for storing program instructions and / or data.

[0260] Based on the same idea, see Fig.10 The embodiment of the present application also provides another communication device 1000, including: an input-output interface 1010 and a logic circuit 1020; the input-output interface 1010 is used to receive code instructions and transmit them to the logic circuit 1020; the logic circuit 1020 is used to run the code instructions to execute the method executed by the first terminal device or the network device in any of the above embodiments.

[0261] The following describes in detail the operations performed by the communication device when applied to the first terminal device or the network device.

[0262] In an optional implementation manner, the communication device 1000 may be applied to a first terminal device to execute the method executed by the first terminal device, for example, Figure 6 or Figure 7 The method executed by the first terminal device in the embodiment shown in .

[0263] For example, the communication device 1000 receives a first power allocation parameter from the network device, and the first power allocation parameter is used to determine a first transmission power of a first link and a second transmission power of a second link, wherein the first link is a link between the communication device 1000 and the network device, and the second link is a link between the communication device 1000 and the second terminal device; the first transmission power and the second transmission power are determined according to the first power allocation parameter, and the sum of the first transmission power and the second transmission power is less than or equal to the maximum transmission power of the communication device 1000; the first information is sent on the first link using the first transmission power; the first information is sent on the second link using the second transmission power, wherein the time domain resources occupied by sending the first information on the first link are the same as the time domain resources occupied by sending the first information on the second link, and the second terminal device is used to receive the first information through the second link and send the first information to the network device.

[0264] For another example, the communication device 1000 receives a second power allocation parameter from the network device, and the second power allocation parameter is used to determine a fifth transmission power of the first link, wherein the first link is the link between the communication device 1000 and the network device; the fifth transmission power is determined according to the second power allocation parameter, and the fifth transmission power is less than or equal to the maximum transmission power of the communication device 1000; the second information is sent using the fifth transmission power, and the second information is transmitted to the network device via the first link and the second link respectively, and the second link is the link between the communication device 1000 and the second terminal device, and the second terminal device is used to receive the second information via the second link and send the second information to the network device.

[0265] Since the communication device 1000 provided in this embodiment can be applied to the first terminal device to complete the method performed by the first terminal device, the technical effects that can be obtained can refer to the above method embodiments and will not be described in detail here.

[0266] In another optional implementation, the communication device 1000 can be applied to a network device to execute the method executed by the above network device, for example, Figure 6 or Figure 7 The method executed by the network device in the embodiment shown in FIG.

[0267] For example, the communication device 1000 sends a first power allocation parameter to a first terminal device, the first power allocation parameter is used to determine a first transmission power of a first link and a second transmission power of a second link, wherein the first link is a link between the first terminal device and the communication device 1000, the second link is a link between the first terminal device and the second terminal device, and the sum of the first transmission power and the second transmission power is less than or equal to the maximum transmission power of the first terminal device; receives first information sent by the first terminal device on the first link using the first transmission power; receives first information sent by the first terminal device on the second link using the second transmission power, wherein the time domain resources occupied by sending the first information on the first link are the same as the time domain resources occupied by sending the first information on the second link, and the second terminal device is used to receive the first information through the second link and send the first information to the communication device 1000.

[0268] For another example, the communication device 1000 sends a second power allocation parameter to the first terminal device, the second power allocation parameter is used to determine the fifth transmission power of the first link, wherein the first link is the link between the first terminal device and the communication device 1000, and the fifth transmission power is less than or equal to the maximum transmission power of the first terminal device; receives second information from the first terminal device, the second information is information that the first terminal device uses the fifth transmission power and is transmitted to the network device through the first link and the second link respectively, and the second link is the link between the first terminal device and the second terminal device; receives second information from the second terminal device, and the second terminal device is used to receive the second information through the second link and send the second information to the communication device 1000.

[0269] Since the communication device 1000 provided in this embodiment can be applied to a network device to complete the method executed by the above network device, the technical effects that can be obtained can refer to the above method embodiment and will not be repeated here.

[0270] An embodiment of the present application also provides a communication system, which may include one or more of the following: a first terminal device, a second terminal device, or a network device.

[0271] Among them, the first terminal device, the second terminal device, or the network device can all refer to the description in the aforementioned method embodiments, and will not be repeated here.

[0272] A computer-readable storage medium is also provided in an embodiment of the present application, including program instructions, which, when executed on a computer, enables the computer to execute the method or steps of any communication device (e.g., a first terminal device, a second terminal device, or a network device) in the above-mentioned embodiments.

[0273] A computer program product is also provided in an embodiment of the present application, including program instructions, which, when executed on a computer, enable the computer to execute the method or steps of any communication device (e.g., a first terminal device, a second terminal device, or a network device) in the above-mentioned embodiments.

[0274] The embodiment of the present application provides a chip system, which includes a processor for implementing the functions of the first terminal device, the second terminal device, or the network device in the aforementioned method (for example, executing the corresponding method or step). The chip system can be composed of a chip, or can include a chip and other discrete devices.

[0275] Optionally, the chip system also includes a memory, which is used to store program instructions so that the above-mentioned processor can read and execute them to implement the corresponding method.

[0276] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0277] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0278] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0279] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0280] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0281] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0282] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the part of the technical solution of the present application that contributes essentially or the part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, and other media that can store program codes.

[0283] The above is only a specific implementation of the present application, but the protection scope of the embodiments of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the embodiments of the present application, which should be included in the protection scope of the embodiments of the present application. Therefore, the protection scope of the embodiments of the present application should be based on the protection scope of the claims.

Claims

1. A power control method, applied to a first terminal device, characterized in that: The method comprises: Receiving a first power allocation parameter from a network device, where the first power allocation parameter is used to determine a first transmit power of a first link and a second transmit power of a second link, wherein the first link is a link between the first terminal device and the network device, and the second link is a link between the first terminal device and a second terminal device; determining the first transmit power and the second transmit power according to the first power allocation parameter, wherein the sum of the first transmit power and the second transmit power is less than or equal to the maximum transmit power of the first terminal device; Sending first information on the first link using the first transmit power; The first information is sent on the second link using the second transmission power, wherein the time domain resources occupied by sending the first information on the first link are the same as the time domain resources occupied by sending the first information on the second link, and the second terminal device is used to receive the first information through the second link and send the first information to the network device.

2. The method according to claim 1, characterized in that The first power allocation parameter includes a first field and / or a second field; wherein: The first field is used to indicate a priority relationship between the first link and the second link; The second field is used to indicate a first power scaling factor and / or a second power scaling factor, wherein the first power scaling factor is used to determine a power upper limit value of the first link, and the second power scaling factor is used to determine a power upper limit value of the second link.

3. The method according to claim 1 or 2, characterized in that: The determining the first transmit power and the second transmit power according to the first power allocation parameter includes: determining a third transmit power of the first link and a fourth transmit power of the second link, wherein the third transmit power and the fourth transmit power are determined according to a power control parameter indicated by the network device; The first transmit power and the second transmit power are determined according to the first power allocation parameter, the third transmit power, and the fourth transmit power.

4. The method according to claim 3, characterized in that The first power allocation parameter includes a first field, and the first field is used to indicate a priority relationship between the first link and the second link; The determining the first transmit power and the second transmit power according to the first power allocation parameter, the third transmit power, and the fourth transmit power includes: Determine the first transmit power and the second transmit power according to the priority relationship, the third transmit power and the fourth transmit power; wherein: The priority relationship is that the priority of the first link is higher than the priority of the second link, and the sum of the third transmission power and the fourth transmission power is greater than the maximum transmission power of the first terminal device, the first transmission power is the third transmission power, and the second transmission power is less than the fourth transmission power; or, The priority relationship is that the priority of the first link is lower than the priority of the second link, and the sum of the third transmission power and the fourth transmission power is greater than the maximum transmission power of the first terminal device, the first transmission power is less than the third transmission power, and the second transmission power is the fourth transmission power; or, The priority relationship is that the priority of the first link is higher than the priority of the second link, and the first transmission power and the second transmission power are both half of the third transmission power; or, The priority relationship is that the priority of the first link is lower than the priority of the second link, and the first transmission power and the second transmission power are both half of the fourth transmission power.

5. The method according to claim 2 or 4, characterized in that: The first field is used to indicate a priority relationship between the first link and the second link, including: The value of the first field is a first value, and the first field is used to indicate that the priority of the first link is higher than the priority of the second link; the value of the first field is a second value, and the first field is used to indicate that the priority of the first link is lower than the priority of the second link; or, The first field is used to indicate the priority of the first link and the priority of the second link respectively.

6. The method according to any one of claims 3 to 5, characterized in that The first power allocation parameter includes a second field, where the second field is used to indicate a first power proportional factor and / or a second power proportional factor, wherein the first power proportional factor is used to determine a power upper limit value of the first link, and the second power proportional factor is used to determine a power upper limit value of the second link; The determining the first transmit power and the second transmit power according to the first power allocation parameter, the third transmit power, and the fourth transmit power includes: Determine the first transmit power according to the power upper limit value of the first link and the third transmit power; wherein the third transmit power is less than or equal to the power upper limit value of the first link, and the first transmit power is the third transmit power; or, the third transmit power is greater than the power upper limit value of the first link, and the first transmit power is less than or equal to the power upper limit value of the first link; The second transmit power is determined according to the power upper limit value of the second link and the fourth transmit power; wherein the fourth transmit power is less than or equal to the power upper limit value of the second link, and the second transmit power is the fourth transmit power; or, the fourth transmit power is greater than the power upper limit value of the second link, and the second transmit power is less than or equal to the power upper limit value of the second link.

7. The method according to claim 2 or 6, characterized in that: The second field is used to indicate the first power proportional factor and the second power proportional factor, including: The second field is used to indicate a first power scale factor group, where the first power scale factor group includes the first power scale factor and the second power scale factor.

8. A power control method, applied to a first terminal device, characterized in that: The method comprises: receiving a second power allocation parameter from a network device, where the second power allocation parameter is used to determine a fifth transmit power of a first link, wherein the first link is a link between the first terminal device and the network device; determining the fifth transmit power according to the second power allocation parameter, the fifth transmit power being less than or equal to the maximum transmit power of the first terminal device; The second information is sent using the fifth transmission power, and the second information is transmitted to the network device through the first link and the second link respectively, the second link is a link between the first terminal device and the second terminal device, and the second terminal device is used to receive the second information through the second link and send the second information to the network device.

9. The method according to claim 8, characterized in that The second power allocation parameter includes a third field, and the third field is used to indicate a priority relationship between the first link and the second link.

10. The method according to claim 8, characterized in that The second power allocation parameter includes a third field, and the third field is used to indicate a priority relationship between the first link and the second link; The determining the fifth transmit power according to the second power allocation parameter includes: The priority relationship is that the priority of the first link is higher than the priority of the second link, and the fifth transmit power is determined according to the path loss of the first link; or, The priority relationship is that the priority of the first link is lower than the priority of the second link, and the fifth transmit power is determined according to the path loss of the second link; or, The priority relationship is that the priority of the first link is the same as the priority of the second link, and the fifth transmit power is determined according to the path loss of the first link and the path loss of the second link.

11. The method according to claim 9 or 10, characterized in that: The third field is used to indicate the priority relationship between the first link and the second link, including: The value of the third field is a third value, and the third field is used to indicate that the priority of the first link is higher than the priority of the second link; the value of the third field is a fourth value, and the third field is used to indicate that the priority of the first link is lower than the priority of the second link; the value of the third field is a fifth value, and the third field is used to indicate that the priority of the first link is the same as the priority of the second link; or, The third field is used to indicate the priority of the first link and the priority of the second link respectively.

12. A power control method, applied to a network device, characterized in that: The method comprises: Sending a first power allocation parameter to a first terminal device, where the first power allocation parameter is used to determine a first transmit power of a first link and a second transmit power of a second link, wherein the first link is a link between the first terminal device and the network device, the second link is a link between the first terminal device and the second terminal device, and a sum of the first transmit power and the second transmit power is less than or equal to a maximum transmit power of the first terminal device; receiving first information sent by the first terminal device on the first link using the first transmit power; Receive the first information sent by the first terminal device on the second link using the second transmission power, wherein the time domain resources occupied by sending the first information on the first link are the same as the time domain resources occupied by sending the first information on the second link, and the second terminal device is used to receive the first information through the second link and send the first information to the network device.

13. The method according to claim 12, characterized in that The first power allocation parameter includes a first field and / or a second field; wherein: The first field is used to indicate a priority relationship between the first link and the second link; The second field is used to indicate a first power scaling factor and / or a second power scaling factor, wherein the first power scaling factor is used to determine a power upper limit value of the first link, and the second power scaling factor is used to determine a power upper limit value of the second link.

14. The method according to claim 13, characterized in that The second field is used to indicate the first power proportional factor and the second power proportional factor, including: The second field is used to indicate a first power scale factor group, where the first power scale factor group includes the first power scale factor and the second power scale factor.

15. The method according to claim 13 or 14, characterized in that The first field is used to indicate a priority relationship between the first link and the second link, including: The value of the first field is a first value, and the first field is used to indicate that the priority of the first link is higher than the priority of the second link; the value of the first field is a second value, and the first field is used to indicate that the priority of the first link is lower than the priority of the second link; or, The first field is used to indicate the priority of the first link and the priority of the second link respectively.

16. A power control method, applied to a network device, characterized in that: The method comprises: Sending a second power allocation parameter to a first terminal device, where the second power allocation parameter is used to determine a fifth transmit power of a first link, where the first link is a link between the first terminal device and the network device, and the fifth transmit power is less than or equal to a maximum transmit power of the first terminal device; receiving second information from the first terminal device, where the second information is information that the first terminal device uses the fifth transmission power and is transmitted to the network device through the first link and the second link respectively, where the second link is a link between the first terminal device and the second terminal device; The second information is received from the second terminal device, where the second terminal device is configured to receive the second information through the second link and send the second information to the network device.

17. The method according to claim 16, characterized in that The second power allocation parameter includes a third field, and the third field is used to indicate a priority relationship between the first link and the second link.

18. The method according to claim 17, characterized in that The third field is used to indicate the priority relationship between the first link and the second link, including: The value of the third field is a third value, and the third field is used to indicate that the priority of the first link is higher than the priority of the second link; the value of the third field is a fourth value, and the third field is used to indicate that the priority of the first link is lower than the priority of the second link; the value of the third field is a fifth value, and the third field is used to indicate that the priority of the first link is the same as the priority of the second link; or, The third field is used to indicate the priority of the first link and the priority of the second link respectively.

19. A communication device, characterized in that: The communication device comprises a module for executing the method according to any one of claims 1 to 11, or a module for executing the method according to any one of claims 12 to 18.

20. A communication device, characterized in that: including a processor and a memory; The memory is used to store one or more computer programs or instructions, and the processor is used to execute the one or more computer programs or instructions stored in the memory, so that the communication device performs the method as described in any one of claims 1 to 11, or performs the method as described in any one of claims 12 to 18.

21. A communication system, characterized in that: The method comprises a first terminal device, a second terminal device and a network device, wherein the first terminal device is used to execute the method as claimed in any one of claims 1 to 11, the network device is used to execute the method as claimed in any one of claims 12 to 18, and the second terminal device is used to receive information sent by the first terminal device and send the information to the network device.

22. A computer-readable storage medium, characterized in that: A computer program or instruction is stored, wherein the computer program or instruction is used to implement the method according to any one of claims 1 to 11, or to implement the method according to any one of claims 12 to 18.

23. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is run on a computer, the computer is caused to perform the method according to any one of claims 1 to 11, or the method according to any one of claims 12 to 18.

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