Communication method and apparatus

Abstract

A communication method and apparatus, relating to the technical field of communications, and being capable of performing power compensation on a network device side, thereby improving the accuracy of a channel estimation result and improving the communication performance. The method comprises: a terminal device receives first instruction information from a network device and sends second indication information to the network device, wherein the first instruction information is used for instructing the terminal device to report a power loss factor corresponding to a port configured by the terminal device, the power loss factor corresponding to the port is used for indicating a power difference value between the port and a first port, and the second indication information is used for indicating the power loss factor corresponding to the port configured by the terminal device.

Description

Communication method and device

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on September 4, 2023, with application number 202311138875.3 and application name “Communication Method and Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of communication technology, and in particular to a communication method and device. Background Art

[0003] In a communication system, a terminal device can send an uplink reference signal to a network device. The network device can then perform uplink channel estimation based on the uplink reference signal to obtain an uplink channel estimation result. Based on the reciprocity of uplink and downlink channels, the network device can also determine a downlink channel estimation result based on the channel estimation result determined based on the uplink reference signal to facilitate subsequent downlink transmission.

[0004] Among them, in order to obtain the channel information corresponding to all antennas of the terminal device, the terminal device needs to send uplink reference signals through all antennas. However, due to the limitations of size and cost, the terminal device is often configured with a number of RF chains (RF chain) or power amplifiers (PA) less than the number of antennas. Therefore, it is impossible to simultaneously complete the transmission of uplink reference signals through all antennas to perform channel information measurement for all antennas. In this case, the uplink reference signal can be sent and measured by antenna switching (AS), that is, the channel measurement is performed by sending uplink reference signals multiple times, and each time a different terminal device antenna is used to send the uplink reference signal to the network device. However, since different antennas may have different power losses, there will be differences in the transmission power of the uplink reference signals sent by different antennas, resulting in a power difference between the channel estimation results corresponding to different antennas when the network device performs channel estimation based on the uplink reference signal, resulting in the channel estimation result not matching the actual channel, affecting the communication performance.

[0005] Therefore, how to accurately obtain the power difference and compensate the channel measurement results to improve the accuracy of the channel estimation results and improve communication performance has become a technical problem that needs to be solved urgently.

[0006] Summary of the Invention

[0007] The present application provides a communication method and apparatus that can perform power compensation on the network device side, improve the accuracy of channel estimation results, and improve communication performance.

[0008] In the first aspect, the present application provides a communication method, which can be executed by a terminal device, or by a component of the terminal device (such as a processor, a chip, or a chip system, etc.), or by a logic module or software that can realize all or part of the terminal device functions. The following takes the method being executed by a terminal device as an example, and the method may include: receiving a first indication message from a network device, and sending a second indication message to the network device. The first indication message is used to instruct the terminal device to report the power loss factor corresponding to the port configured by the terminal device, and the power loss factor corresponding to the port is used to indicate the power difference between the port and the first port; the second indication message is used to indicate the power loss factor corresponding to the port configured by the terminal device.

[0009] Based on the first aspect, the terminal device can send the power loss factor corresponding to the port configured by the terminal device to the network device through the second indication information based on the first indication information issued by the network device. The sending of the second indication information enables the network device to obtain the power loss factor reported by the terminal device, so that the power loss factor reported by the terminal device can be considered, which can reduce the channel estimation error caused by the power loss between antennas, improve the accuracy of the channel estimation results, and improve communication performance.

[0010] In one possible design, the power loss factor reported by the terminal device is used to perform power compensation on the channel estimation result determined based on the uplink reference signal.

[0011] In one possible design, capability information is sent to a network device; wherein the capability information is used to indicate that the terminal device supports reporting the power loss factor corresponding to the port configured on the terminal device.

[0012] Based on this possible design, the terminal device can inform the network device whether it can support power loss factor reporting by reporting capability information to the network device, so that the network device can trigger the terminal device to flexibly report the power loss factor corresponding to the port that requires power compensation.

[0013] In one possible design, the capability information includes third indication information, and the third indication information is used to indicate the maximum value of the power loss factor corresponding to the port configured by the terminal device.

[0014] Based on this possible design, the terminal device can also further indicate the maximum value of the power loss factor corresponding to its own port through the third indication information, so that the network device can judge whether the terminal device is capable of complete power pre-compensation based on the maximum value and the power margin report reported by the terminal device, thereby triggering the terminal device's power loss factor reporting at the appropriate time, avoiding the large reporting overhead caused by the terminal device's continuous reporting.

[0015] In one possible design, the first port is a reference port; or, the first port is an adjacent port of the port.

[0016] The reference port may be a port having a specific port index, for example, the reference port may be a port having a port index of 0. The adjacent port of a port may be determined according to the port index of the port, for example, taking the port index of a port as k, the adjacent port of the port may be a port having a port index of k-1 or k+1.

[0017] In one possible design, fourth indication information is received from the network device; wherein the fourth indication information is used to indicate the first port.

[0018] In one possible design, fifth indication information is sent to the network device; wherein the fifth indication information is used to indicate the first port.

[0019] Based on the above three possible designs, the first port may be predefined by a protocol or determined by a network device or a terminal device, without limitation.

[0020] In one possible design, sending a second indication message to the network device includes: performing power compensation on the uplink reference signal corresponding to one or more ports of the terminal device to determine the transmit power corresponding to each port; determining the power loss factor corresponding to each port based on the transmit power corresponding to each port and the transmit power corresponding to the first port; and sending a second indication message to the network device based on the power loss factor corresponding to each port.

[0021] Based on this possible design, when determining the power loss factor corresponding to a port, the terminal device can flexibly perform full or partial power pre-compensation on each port based on the actual power margin and transmit power requirements. The power loss factor corresponding to the port is then determined based on the transmit power after pre-compensation. This minimizes the channel estimation error caused by inter-antenna power loss, improves the accuracy of the channel estimation results, and enhances communication performance.

[0022] In a second aspect, the present application provides a communication method, which can be executed by a network device, or by a component of the network device (such as a processor, chip, or chip system, etc.), or by a logic module or software that can implement all or part of the network device functions. The following takes the method executed by the network device as an example, and the method may include: sending first indication information to a terminal device and receiving second indication information from the terminal device; wherein the first indication information is used to instruct the terminal device to report a power loss factor corresponding to a port configured for the terminal device, and the power loss factor corresponding to the port is used to indicate the power difference between the port and the first port; and the second indication information is used to indicate the power loss factor corresponding to the port configured for the terminal device.

[0023] Based on the second aspect, the network device can send a first indication message to the terminal device to instruct the terminal device to report the power loss factor corresponding to the port. The receipt of the second indication message enables the network device to obtain the power loss factor reported by the terminal device, thereby being able to consider the power loss factor reported by the terminal device, which can reduce the channel estimation error caused by the power loss between antennas, improve the accuracy of the channel estimation results, and improve communication performance.

[0024] In one possible design, the method further includes: performing power compensation on a channel estimation result determined based on an uplink reference signal according to a power loss factor reported by the terminal device.

[0025] In one possible design, sending a first indication information to a terminal device includes: receiving a power margin report from the terminal device; wherein the power margin report is used to indicate a power margin or a power margin range; and when determining that the power margin or the power margin range meets a first condition, sending a first indication information to the terminal device.

[0026] Based on this possible design, the network device can determine whether the terminal device is capable of performing complete power pre-compensation for the power loss between antennas based on the power margin or power margin range reported by the terminal device. When the network device determines that the power margin or power margin range reported by the terminal device meets the first condition, it means that the expected transmit power of the SRS signal does not have sufficient transmit power margin compared to the maximum transmit power limit of the terminal device, and the terminal device cannot perform complete power pre-compensation for the power loss between antennas (such as the terminal device is completely unable to perform power pre-compensation for the power loss between antennas, or the terminal device can only pre-compensate a part of the power loss based on the maximum transmit power and cannot perform complete pre-compensation). At this time, the network device can send a first indication message to the terminal device, instructing the terminal device to report the power loss factor corresponding to the port, and the network device performs power compensation on the channel estimation result determined based on the SRS signal according to the power loss factor corresponding to the port, thereby reducing the channel estimation error caused by the power loss between antennas, improving the accuracy of the channel estimation result, and improving communication performance.

[0027] In one possible design, the power margin or the power margin range satisfies a first condition, including: the power margin is less than a first threshold; or, the minimum value of the power margin range is less than a second threshold; or, the maximum value of the power margin range is less than a third threshold.

[0028] In one possible design, the first threshold, the second threshold, or the third threshold is predefined; or, the first threshold, the second threshold, or the third threshold is determined based on the maximum value of the power loss factor corresponding to the port configured by the terminal device.

[0029] Based on the above two possible designs, multiple feasible solutions are provided for the network device to determine whether the power headroom or power headroom range reported by the terminal device meets the first condition.

[0030] In one possible design, before sending the first indication information to the terminal device, the method also includes: receiving capability information from the terminal device; wherein the capability information is used to indicate that the terminal device supports reporting the power loss factor corresponding to the port configured by the terminal device.

[0031] Based on this possible design, the terminal device can inform the network device whether it can support power loss factor reporting by reporting capability information to the network device, so that the network device can trigger the terminal device to flexibly report the power loss factor corresponding to the port that requires power compensation.

[0032] In one possible design, the capability information includes third indication information, and the third indication information is used to indicate the maximum value of the power loss factor corresponding to the port configured by the terminal device.

[0033] Based on this possible design, the terminal device can also further indicate the maximum value of the power loss factor corresponding to its own port through the third indication information, so that the network device can judge whether the terminal device is capable of complete power pre-compensation based on the maximum value and the power margin report reported by the terminal device, thereby triggering the terminal device's power loss factor reporting at the appropriate time, avoiding the large reporting overhead caused by the terminal device's continuous reporting.

[0034] In one possible design, the first port is a reference port; or, the first port is an adjacent port of the port.

[0035] The reference port may be a port having a specific port index, for example, the reference port may be a port having a port index of 0. The adjacent port of a port may be determined according to the port index of the port, for example, taking the port index of a port as k, the adjacent port of the port may be a port having a port index of k-1 or k+1.

[0036] In one possible design, fourth indication information is sent to the terminal device; wherein the fourth indication information is used to indicate the first port.

[0037] In one possible design, fifth indication information is received from the terminal device; wherein the fifth indication information is used to indicate the first port.

[0038] Based on the above three possible designs, the first port may be predefined by a protocol or determined by a network device or a terminal device, without limitation.

[0039] In the third aspect, the present application provides a communication device, which can be applied to the terminal device of the first aspect above to implement the functions performed by the terminal device above. The communication device can be a terminal device, or it can be a chip or chip system or system on chip, etc. of the terminal device. The communication device can perform the functions performed by the terminal device above through hardware, or it can perform the corresponding software implementation through hardware. The hardware or software includes one or more modules corresponding to the above functions. For example, a transceiver module and a processing module. The transceiver module can independently complete the following transceiver operations, or it can cooperate with the processing module to complete the following transceiver operations; accordingly, the processing module can also independently complete the following processing operations, or it can cooperate with the transceiver module to complete the following processing operations, without limitation.

[0040] The transceiver module can be used to receive first indication information from the network device and can also be used to send second indication information to the network device. The first indication information is used to instruct the terminal device to report the power loss factor corresponding to the port configured on the terminal device, where the power loss factor corresponding to the port indicates the power difference between the port and the first port; the second indication information is used to indicate the power loss factor corresponding to the port configured on the terminal device.

[0041] In one possible design, the power loss factor reported by the terminal device is used to perform power compensation on the channel estimation result determined based on the uplink reference signal.

[0042] In one possible design, the transceiver module is also used to send capability information to the network device; wherein the capability information is used to indicate that the terminal device supports reporting the power loss factor corresponding to the port configured by the terminal device.

[0043] In one possible design, the capability information includes third indication information, and the third indication information is used to indicate the maximum value of the power loss factor corresponding to the port configured by the terminal device.

[0044] In one possible design, the first port is a reference port; or, the first port is an adjacent port of the port.

[0045] In one possible design, the transceiver module is also used to receive fourth indication information from the network device; wherein the fourth indication information is used to indicate the first port.

[0046] In one possible design, the transceiver module is also used to send fifth indication information to the network device; wherein the fifth indication information is used to indicate the first port.

[0047] In one possible design, the processing module is used to perform power compensation on the uplink reference signal corresponding to one or more ports of the terminal device to determine the transmit power corresponding to each port; the processing module is also used to determine the power loss factor corresponding to each port based on the transmit power corresponding to each port and the transmit power corresponding to the first port; the transceiver module is also used to send a second indication information to the network device based on the power loss factor corresponding to each port.

[0048] Optionally, the transceiver module and processing module of the communication device in the third aspect can also perform the corresponding functions in any possible design of the above-mentioned first aspect. Please refer to the detailed description in the method example for details. The beneficial effects that can be achieved can also be referred to the aforementioned related content.

[0049] In a fourth aspect, the present application provides a communication device, which can be applied to the network device of the second aspect above to implement the functions performed by the above network device. The communication device can be a network device, or a chip or chip system or system on chip of the network device, etc. The communication device can perform the functions performed by the above network device through hardware, or it can perform the corresponding software implementation through hardware. The hardware or software includes one or more modules corresponding to the above functions. For example, a transceiver module and a processing module. The transceiver module can independently complete the following transceiver operations, or it can cooperate with the processing module to complete the following transceiver operations; accordingly, the processing module can also independently complete the following processing operations, or it can cooperate with the transceiver module to complete the following processing operations, without limitation.

[0050] Among them, the transceiver module can be used to send a first indication message to the terminal device, and can also be used to receive a second indication message from the terminal device; wherein the first indication information is used to instruct the terminal device to report the power loss factor corresponding to the port configured by the terminal device, and the power loss factor corresponding to the port is used to indicate the power difference between the port and the first port; the second indication information is used to indicate the power loss factor corresponding to the port configured by the terminal device.

[0051] In one possible design, the processing module is used to perform power compensation on an uplink reference signal from a terminal device based on a power loss factor.

[0052] In one possible design, the transceiver module is also used to receive a power margin report from the terminal device; wherein the power margin report is used to indicate the power margin or the power margin range; the transceiver module is also used to send a first indication information to the terminal device when the processing module determines that the power margin or the power margin range meets the first condition.

[0053] In one possible design, the power margin or the power margin range satisfies a first condition, including: the power margin is less than a first threshold; or, the minimum value of the power margin range is less than a second threshold; or, the maximum value of the power margin range is less than a third threshold.

[0054] In one possible design, the first threshold, the second threshold, or the third threshold is predefined; or, the first threshold, the second threshold, or the third threshold is determined based on the maximum value of the power loss factor corresponding to the port configured by the terminal device.

[0055] In one possible design, the transceiver module is also used to receive capability information from the terminal device; wherein the capability information is used to indicate that the terminal device supports reporting the power loss factor corresponding to the port configured for the terminal device.

[0056] In one possible design, the capability information includes third indication information, and the third indication information is used to indicate the maximum value of the power loss factor corresponding to the port configured by the terminal device.

[0057] In one possible design, the first port is a reference port; or, the first port is an adjacent port of the port.

[0058] In one possible design, the transceiver module is also used to send fourth indication information to the terminal device; wherein the fourth indication information is used to indicate the first port.

[0059] In one possible design, the transceiver module is also used to receive fifth indication information from the terminal device; wherein the fifth indication information is used to indicate the first port.

[0060] Optionally, the transceiver module and processing module of the communication device in the fourth aspect can also perform the corresponding functions in any possible design of the above-mentioned second aspect. Please refer to the detailed description in the method example for details. The beneficial effects that can be achieved can also be referred to the aforementioned related content.

[0061] In a fifth aspect, the present application provides a communication device, which includes one or more processors; one or more processors are used to run computer programs or instructions, and when the one or more processors execute the computer instructions or instructions, the communication device executes the communication method described in the first aspect or any possible design of the first aspect, or executes the communication method described in the second aspect or any possible design of the second aspect.

[0062] In one possible design, the communication device further includes one or more memories, the one or more memories being coupled to one or more processors, and the one or more memories being used to store the above-mentioned computer programs or instructions. In one possible implementation, the memory is located outside the communication device. In another possible implementation, the memory is located within the communication device. In this application, the processor and memory may also be integrated into one device, that is, the processor and memory may also be integrated together. In one possible implementation, the communication device further includes a transceiver, and the transceiver is used to receive information and / or send information.

[0063] In one possible design, the communication device further includes one or more communication interfaces, the one or more communication interfaces are coupled to one or more processors, and the one or more communication interfaces are used to communicate with other modules outside the communication device.

[0064] In a sixth aspect, the present application provides a communication device, which includes an input / output interface and a logic circuit; the input / output interface is used to input and / or output information; the logic circuit is used to execute the communication method described in the first aspect or any possible design of the first aspect, or to execute the communication method described in the second aspect or any possible design of the second aspect, and process and / or generate information based on the information.

[0065] In the seventh aspect, the present application provides a computer-readable storage medium, which stores computer instructions or programs. When the computer instructions or programs are run on a computer, the communication method described in the first aspect or any possible design of the first aspect is executed, or the communication method described in the second aspect or any possible design of the second aspect is executed.

[0066] In an eighth aspect, the present application provides a computer program product comprising computer instructions, which, when run on a computer, enables the communication method described in the first aspect or any possible design of the first aspect to be executed, or enables the communication method described in the second aspect or any possible design of the second aspect to be executed.

[0067] In a ninth aspect, the present application provides a computer program which, when run on a computer, causes the communication method described in the first aspect or any possible design of the first aspect to be executed, or causes the communication method described in the second aspect or any possible design of the second aspect to be executed.

[0068] In the tenth aspect, the present application provides a chip, comprising: a processor, the processor being coupled to a memory, the memory being used to store programs or instructions, and when the programs or instructions are executed by the processor, the chip executes the communication method described in the first aspect or any possible design of the first aspect, or executes the communication method described in the second aspect or any possible design of the second aspect.

[0069] Among them, the technical effects brought about by any design method in the fifth to tenth aspects can refer to the technical effects brought about by the above-mentioned first aspect or any possible design in the first aspect, or refer to the technical effects brought about by the above-mentioned second aspect or any possible design in the second aspect, and no further details will be given.

[0070] In an eleventh aspect, the present application provides a communication system, which may include a communication device as described in the third aspect or any possible design of the third aspect, and a communication device as described in the fourth aspect or any possible design of the fourth aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] FIG1 is a schematic diagram of a terminal device provided in an embodiment of the present application;

[0072] FIG2 is a schematic diagram of a communication system provided in an embodiment of the present application;

[0073] FIG3 is a schematic diagram of a communication device provided in an embodiment of the present application;

[0074] FIG4 is a flow chart of a communication method provided in an embodiment of the present application;

[0075] FIG5 is a schematic diagram of a communication method provided in an embodiment of the present application;

[0076] FIG6 is a schematic diagram of a communication method provided in an embodiment of the present application;

[0077] FIG7 is a schematic diagram of a communication method provided in an embodiment of the present application;

[0078] FIG8 is a schematic diagram of the composition of a communication device provided in an embodiment of the present application;

[0079] FIG9 is a schematic diagram of the composition of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0080] Before describing the embodiments of the present application, the technical terms involved in the embodiments of the present application are described.

[0081] Sounding reference signal (SRS): is an uplink reference signal sent by a terminal device to a network device. It is a key reference signal for the network device to obtain channel estimation results (or channel information, channel state information, etc.). After the network device receives the SRS signal sent by the terminal device, it can perform channel estimation based on the SRS signal to obtain the uplink (UL) channel estimation result from the terminal device to the network device. If there is channel reciprocity between the uplink and downlink channels (such as a time division duplexing (TDD) system), the network device can also determine the downlink channel estimation result from the network device to the terminal device based on the uplink channel estimation result according to the channel reciprocity. After the network device determines the downlink channel estimation result corresponding to the terminal device, it can perform data transmission resource scheduling or precoding processing on the terminal device based on the downlink channel estimation result.

[0082] Port: It can also be called the port of the uplink reference signal, the uplink reference signal port, the SRS port, or the antenna port, etc. Each port in the embodiment of the present application can be replaced with any of the foregoing descriptions without limitation. Each port can correspond to a terminal antenna or a terminal antenna port. The uplink reference signal can be an SRS, or other reference signals, such as a demodulation reference signal (DMRS), a phase-tracking reference signal (PTRS), etc. The port can be used to carry an SRS signal, and each port corresponds to an SRS signal. Different ports can be multiplexed by code division, frequency division, time division, or space division. In one implementation, an SRS resource may include Each SRS port corresponds to a configured time / frequency / code domain resource. Typically, each SRS port occupies a different time / frequency / code domain resource to reduce mutual interference. Each SRS port corresponds to an antenna (such as a physical antenna or a virtual antenna) of a terminal device. The antenna may also be referred to as a terminal device antenna, a terminal device transmit antenna, a terminal device antenna port, or a terminal device transmit antenna port, without limitation.

[0083] For example, if a terminal device has four antennas, and the terminal device is configured with four radio frequency chains (RF chains), then the terminal device has the ability to transmit with four antennas and can be called a 4-transmit 4-receive (4T4R) terminal device. The terminal device can send SRS signals from four ports, where each port corresponds to an antenna. The network device performs channel estimation based on the SRS signals from the four ports sent by the terminal device, and can obtain the uplink channel estimation result H corresponding to the four antennas of the terminal device. UL , using the reciprocity of uplink and downlink channels, we can get the downlink channel estimation result H of the four antennas corresponding to the terminal device DL .

[0084] Due to size and cost constraints, terminal devices often have fewer RF links or power amplifiers (PAs) than antennas. For example, as shown in Figure 1 (a), the terminal device is configured with four antennas. When receiving downlink signals, it can use all four antennas for signal reception. However, the terminal device is only configured with one RF link. When transmitting uplink signals, it can only use one transmit antenna at a time. This type of terminal device is commonly referred to as a 1T4R terminal device. To obtain complete channel estimation results for all antennas, a 1T4R terminal device needs to switch between different antennas to send SRS signals at different times. This is called SRS antenna selection, also known as SRS antenna switching. For example, a network device can configure four SRS resources for the terminal device, each corresponding to one antenna. At different SRS signal transmission times, the terminal device can use the four antennas to transmit the four configured SRS resources in turn. Therefore, at least four SRS signal transmissions are required to obtain channel estimation results for the four antennas.

[0085] Similarly, for a 2T4R terminal device as shown in Figure 1(b), it is configured with four antennas and two RF chains. The network device can configure two SRS resources for the terminal device, with each SRS resource corresponding to one antenna group, and each antenna group containing two antennas. At different SRS signal transmission times, the terminal device can alternately use the two antenna groups to transmit the two configured SRS resources. Therefore, at least two SRS signal transmissions are required to obtain the channel estimation results corresponding to the four antennas.

[0086] For an nTmR terminal device (n < m), the radio frequency link needs to switch different antennas through a switch, so there is insertion loss (IL). In addition, considering the volume and usage scenario of the terminal device, the antennas are often distributed at different positions of the terminal device, resulting in differences in the line routing distances between different antennas and the radio frequency link. The above factors will cause different power losses between different antennas of the nTmR terminal device.

[0087] Among them, the power loss between a certain antenna and another antenna can be called the power loss factor corresponding to the certain antenna. The power loss factor can be the power difference (the unit can be dB) between the certain antenna and the other antenna, or it can also be the power ratio between the certain antenna and the other antenna (such as a1, a2, a3, a4, etc. below), without limitation.

[0088] For example, taking a 1T4R terminal device as an example, assuming that the transmission power corresponding to the main antenna is P, under the same transmission power, when the remaining three antennas transmit, the corresponding actual transmission powers are a1P, a2P, and a3P respectively, and 0 < a1 ≤ 1, 0 < a2 ≤ 1, 0 < a3 ≤ 1. For example, a1 = a2 = a3 = 0.5. Among them, a1, a2, and a3 are the power ratios between the remaining three antennas and the main antenna, that is, a1, a2, and a3 are the power loss factors corresponding to the remaining three antennas respectively.

[0089] It can be understood that since each port corresponds to an antenna of the terminal device, the above power loss factor can also be defined from the port perspective, that is, the power loss factor can be the power difference or power ratio between a certain port and another port, and this power loss factor can also be called the power loss factor corresponding to the port.

[0090] For a TDD system, the acquisition of the downlink channel estimation result depends on the uplink transmission of SRS signals. For an nTmR terminal device (n < m), considering that different antennas may correspond to different power loss factors, when switching the SRS antennas for transmission, the actual transmission powers of different antennas for transmitting SRS signals may be different, which will cause a power difference between the channel estimation results corresponding to different antennas when the network device performs channel estimation based on the SRS signals, resulting in a mismatch between the channel estimation result and the actual channel (that is, the uplink channel estimation result does not match the actual uplink channel, and the downlink channel estimation result does not match the actual downlink channel), affecting the communication performance. For example, since the precoding and scheduling during downlink transmission directly depend on the channel estimation result based on the SRS signal, the mismatch between the downlink channel estimation result and the downlink channel will directly affect the downlink transmission performance.

[0091] For example, in the case of perfect uplink and downlink channel reciprocity, the downlink channel estimation result should be the following H DL However, because there may be power differences between the channel estimation results corresponding to different antennas, the downlink channel estimation results based on the SRS signal estimation are as follows: The downlink channel estimation result does not match the actual downlink channel, affecting downlink transmission performance:

[0092] Among them, H UL represents the uplink channel estimation result, T represents transpose, H SRS represents the uplink channel estimation result determined based on the SRS signal, 1, a1, a2, and a3 represent the power loss factors corresponding to different antennas, and H1, H2, H3, and H4 represent the channel estimation results corresponding to different antennas.

[0093] In order to solve the above problem, it is proposed that the terminal device may perform power pre-compensation according to the power loss corresponding to each antenna when sending the SRS signal.

[0094] The terminal device can pre-know the insertion loss of each antenna due to wiring and switching based on the antenna hardware characteristics, that is, the power loss corresponding to each antenna. In one implementation, to achieve a balanced transmit power state for each antenna, the terminal device can use different transmit powers for different antennas when transmitting SRS signals based on the known power loss corresponding to each antenna. This pre-compensates for the power loss caused by insertion loss when transmitting the SRS signal, effectively avoiding channel estimation errors caused by power loss between antennas, preventing mismatches between the channel estimation results and the actual channel, and improving communication performance.

[0095] For example, taking the terminal device as a 1T4R terminal device, it is assumed that the power loss factors corresponding to the four antennas of the terminal device are a1=1, a2=a3=a4=0.5 respectively. After the terminal device transmits the SRS signal through the four antennas, the signal received by the network device can be the following y. When the power loss factor is known, the terminal device can perform power pre-compensation on the transmit power of each antenna. After power pre-compensation, the signal received by the network device can be the following y'. It can be seen that after power pre-compensation, the power loss between different antennas is equivalently leveled, thereby effectively avoiding the channel estimation error caused by power loss between antennas:

[0096] Among them, H represents the channel matrix corresponding to the four antennas, s1, s2, s3, and s4 represent the SRS signals sent by the four antennas respectively, and n represents the corresponding noise vector. represents the power pre-compensation matrix.

[0097] Based on the above description, power precompensation for a terminal device actually requires sending higher power to the antenna experiencing power loss to offset the power loss. However, when a terminal device actually transmits an SRS signal, it is subject to the maximum transmit power limit, so power precompensation is not possible in all scenarios. If a terminal device determines that power precompensation cannot be performed based on the maximum transmit power, or if the power that can be compensated through power precompensation is limited and full power precompensation is not possible, there will still be a mismatch between the channel estimation result and the actual channel, affecting communication performance.

[0098] For example, when the path loss between the terminal device and the network device is large (such as when the terminal device is a remote user or a cell-edge user), the transmit power of the SRS signal determined by the terminal device may have reached full power (i.e., reached the maximum transmit power). At this time, there is no power margin available for power pre-compensation of the terminal device. Alternatively, when the power loss between the antennas of the terminal device is greater than the transmit power margin of the SRS signal, it is impossible to fully compensate for the power loss between the antennas through power pre-compensation. In this case, there is still the problem that the channel estimation result obtained by the network device through the SRS signal measurement does not match the actual channel, which directly affects the performance of subsequent downlink transmission.

[0099] In order to solve this technical problem, an embodiment of the present application provides a communication method, in which a terminal device receives first indication information from a network device and sends second indication information to the network device; wherein the first indication information is used to instruct the terminal device to report the power loss factor corresponding to the port configured by the terminal device, and the power loss factor corresponding to the port is used to indicate the power difference between the port and the first port; the second indication information is used to indicate the power loss factor corresponding to the port configured by the terminal device.

[0100] In an embodiment of the present application, the terminal device can send the power loss factor corresponding to the port configured by the terminal device to the network device, so that the network device can obtain the power loss factor reported by the terminal device, and thus can consider the power loss factor reported by the terminal device. For example, the network device performs power compensation on the channel estimation result determined based on the uplink reference signal (such as the SRS signal) according to the power loss factor reported by the terminal device, which can reduce the channel estimation error caused by the power loss between antennas, improve the accuracy of the channel estimation result, and improve communication performance.

[0101] To facilitate understanding of the embodiments of the present application, the following points are first explained:

[0102] (1) “Sending” and “receiving” in the embodiments of the present application indicate the direction of signal transmission. For example, “sending information to XX” can be understood as the destination of the information being XX, which can include direct sending through the air interface, as well as indirect sending through the air interface by other units or modules. “Receiving information from YY” can be understood as the source of the information being YY, which can include direct receiving from YY through the air interface, as well as indirect receiving from YY through the air interface from other units or modules. “Sending” can also be understood as the “output” of the chip interface, and “receiving” can also be understood as the “input” of the chip interface.

[0103] In other words, sending and receiving can be performed between devices, for example, between a network device and a terminal device, or can be performed within a device, for example, sending or receiving between components, modules, chips, software modules or hardware modules within the device through a bus, wiring or interface.

[0104] It is understandable that information may be processed between the source and destination of information transmission, such as coding, modulation, etc., but the destination can understand the valid information from the source. Similar expressions in this application can be understood similarly and will not be repeated.

[0105] (2) In the embodiments of the present application, "indication" may include direct indication and indirect indication, and may also include explicit indication and implicit indication. The information indicated by a certain information (such as the indication information described below) is called information to be indicated. In the specific implementation process, there are many ways to indicate the information to be indicated, such as but not limited to, directly indicating the information to be indicated, such as the information to be indicated itself or the index of the information to be indicated. The information to be indicated may also be indirectly indicated by indicating other information, wherein the other information is associated with the information to be indicated; or only a part of the information to be indicated may be indicated, while the other part of the information to be indicated is known or agreed in advance. For example, the indication of specific information may be achieved by means of the arrangement order of each information agreed in advance (such as predefined by the protocol), thereby reducing the indication overhead to a certain extent. The present application does not limit the specific method of indication. It is understandable that for the sender of the indication information, the indication information can be used to indicate the information to be indicated, and for the receiver of the indication information, the indication information can be used to determine the information to be indicated.

[0106] The following describes in detail the implementation of the embodiments of the present application in conjunction with the accompanying drawings.

[0107] The communication method provided in the embodiments of the present application can be used in any communication system, which can be a third generation partnership project (3GPP) communication system, such as a long term evolution (LTE) system, or a fifth generation (5G) mobile communication system, a system of hybrid networking of LTE and 5G, a new radio (NR) system, an NR vehicle to everything (V2X) system, a TDD system, a frequency-division duplex (FDD) system, a device-to-device (D2D) communication system, a machine to machine (M2M) communication system, the Internet of Things (IoT), a narrowband Internet of Things (NB-IoT) system, a global system for mobile communications (GSM), an enhanced data rate for GSM evolution (EDGE), a wideband code division multiple access (CDMA) system, and the like. The following types of communication systems are not restricted: wireless communication systems (WCDMA), code division multiple access 2000 (CDMA), code division multiple access 2000 (CDMA), time division-synchronization code division multiple access (TD-SCDMA), enhanced mobile broadband (eMBB), ultra-reliable and low-latency communication (URLLC), enhanced machine-type communication (eMTC), and various types of next-generation communication systems, such as the sixth generation (6G) mobile communication system, and non-terrestrial network (NTN) system, non-3GPP communication system, etc.

[0108] The embodiments of the present application can be applied to homogeneous network scenarios, heterogeneous network scenarios, multi-point collaborative transmission scenarios (such as macro base stations and macro base stations, micro base stations and micro base stations, macro base stations and micro base stations), low-frequency (sub 6G) scenarios, high-frequency (above 6G) scenarios, single transmission reception point (Single-TRP) scenarios, multi-TRP (Multi-TRP) scenarios, or any scenario derived from single TRP or multi-TRP, and other communication scenarios, without limitation.

[0109] The following describes the communication system provided in an embodiment of the present application using Figure 2 as an example.

[0110] FIG2 is a schematic diagram of a communication system provided in an embodiment of the present application. As shown in FIG2 , the communication system may include one or more terminal devices and one or more network devices.

[0111] Among them, the terminal device in Figure 2 can be located within the beam / cell coverage of the network device, and the network device can provide communication services for the terminal device.

[0112] The terminal device in Figure 2 can be a device with wireless transceiver capabilities or a chip or chip system that can be installed in the device, which can allow users to access the network and is used to provide voice and / or data connectivity to users. The terminal device can also be called user equipment (UE), subscriber unit (subscriber unit), terminal (terminal), mobile station (MS), or mobile terminal (MT).

[0113] Exemplarily, the terminal device in FIG2 may be a mobile phone, a tablet computer, or a computer with wireless transceiver function. The terminal device may also be a user station, a mobile station, a remote station, a remote terminal device, a mobile terminal device, a user terminal device, a wireless communication device, a user agent, a user device, a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication capabilities, a computing device, a processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in the Internet of Things, a home appliance, a virtual reality (VR) terminal, an augmented reality (AR) terminal, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in telemedicine, a wireless terminal in a smart grid, a wireless terminal in a smart city, a wireless terminal in a smart home, a vehicle with vehicle-to-vehicle (V2V) communication capabilities, an intelligent connected vehicle, a UAV to UAV (UAV to Unmanned aerial vehicles (UAVs, U2Us) with communication capabilities, terminal devices in future networks, or terminal devices in future evolved public land mobile networks (PLMNs), etc. are not restricted.

[0114] The network device in Figure 2 can be any device deployed in an access network that can communicate wirelessly with a terminal device. It can also be a chip or chip system that can be installed in the above-mentioned device. It can also be a logical node or logical module or a function implemented in software. It can be used to implement wireless physical control functions, resource scheduling and wireless resource management, wireless access control, and mobility management. Specifically, the network device can be a device that supports wired access or a device that supports wireless access.

[0115] Exemplarily, the network device may be composed of one or more access network (AN) / radio access network (RAN) nodes. The AN / RAN node may be: a base station (NB), a macro base station, a micro base station (or described as a small station), a pico base station, a balloon base station, a relay station, an enhanced nodeB (eNB), a next generation nodeB (gNB), a home base station (e.g., a home evolved NodeB, or a home NodeB, HNB), a base station in a 5G communication system, a base station in a future mobile communication system, an access point (AP) in a wireless-fidelity (WiFi) system, a TRP, a transmission point (TP), a transmission measurement function (TMF), a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a wearable device, an in-vehicle device, or some other access node, etc., without limitation.

[0116] In another example, network equipment may include a baseband unit (BBU) and a remote radio unit (RRU). The BBU and RRU can be placed in different locations. For example, the RRU can be remotely located in a high-traffic area, while the BBU can be placed in a central computer room. The BBU and RRU can also be placed in the same computer room. The BBU and RRU can also be different components within the same rack.

[0117] In another example, the network device may also be a device including a centralized unit (CU) node, or a distributed unit (DU) node, or a CU node and a DU node. For example, the network device can be divided into CU and DU from a logical function perspective, with some protocol layer functions placed in the CU for centralized control, and the remaining part or all of the protocol layer functions distributed in the DU, which is centrally controlled by the CU. Furthermore, the centralized unit CU can also be divided into a control plane (CU-CP) and a user plane (CU-UP). In different systems, CU (including CU-CP or CU-UP) or DU may also have different names. For example, in an open radio access network (O-RAN) system, CU may also be called O-CU (open CU), DU may also be called O-DU, CU-CP may also be called O-CU-CP, and CU-UP may also be called O-CU-UP.

[0118] It should be noted that the terminal devices and network devices in the embodiments of the present application can be one or more chips, or a system on chip (SOC), etc. Figure 2 is only an exemplary figure, and the number of devices included is not limited. In addition, in addition to the devices shown in Figure 2, the communication system can also include other devices, such as wireless relay devices and wireless backhaul devices. The names of the various devices and the names of the various links in Figure 2 are not limited. In addition to the names shown in Figure 2, the various devices and links can also be named other names without limitation.

[0119] In a specific implementation, as shown in Figure 2, each terminal device and network device may adopt the structure shown in Figure 3, or include the components shown in Figure 3. Figure 3 is a schematic diagram of the structure of a communication device 300 provided in an embodiment of the present application. The communication device 300 can be a terminal device or a chip or system-on-chip in a terminal device; it can also be a network device or a chip or system-on-chip in a network device. As shown in Figure 3, the communication device 300 includes a processor 301, a transceiver 302, and a communication circuit 303.

[0120] Furthermore, the communication device 300 may further include a memory 304 , wherein the processor 301 , the memory 304 and the transceiver 302 may be connected via a communication line 303 .

[0121] The processor 301 is a central processing unit (CPU), a general-purpose processor, a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. The processor 301 may also be other devices with processing functions, such as circuits, devices, or software modules, without limitation.

[0122] Transceiver 302 is used to communicate with other devices or other communication networks. Such other communication networks may be Ethernet, radio access networks (RAN), wireless local area networks (WLAN), etc. Transceiver 302 may be a module, circuit, transceiver, or any other device capable of communication.

[0123] The communication line 303 is used to transmit information between the components included in the communication device 300.

[0124] The memory 304 is used to store instructions, where the instructions may be computer programs.

[0125] The memory 304 may be a read-only memory (ROM) or other type of static storage device that can store static information and / or instructions, or a random access memory (RAM) or other type of dynamic storage device that can store information and / or instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, etc., without limitation.

[0126] It should be noted that memory 304 can exist independently of processor 301 or can be integrated with processor 301. Memory 304 can be used to store instructions, program code, or data. Memory 304 can be located within or outside of communication device 300, without limitation. Processor 301 is configured to execute instructions stored in memory 304 to implement the communication methods provided in the following embodiments of this application.

[0127] In an example, the processor 301 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 3 .

[0128] As an optional implementation, the communication device 300 includes multiple processors. For example, in addition to the processor 301 in FIG. 3 , it may also include a processor 307 .

[0129] As an optional implementation, the communication apparatus 300 further includes an output device 305 and an input device 306. For example, the input device 306 is a keyboard, a mouse, a microphone, a joystick, or the like, and the output device 305 is a display screen, a speaker, or the like.

[0130] It should be noted that the communication device 300 may be a desktop computer, a portable computer, a network server, a mobile phone, a tablet computer, a wireless terminal, an embedded device, a chip system, or a device having a structure similar to that shown in FIG3 . Furthermore, the structure shown in FIG3 does not limit the communication device. In addition to the components shown in FIG3 , the communication device may include more or fewer components than shown, or combine certain components, or arrange the components differently.

[0131] In the embodiment of the present application, the chip system can be composed of chips, or can include chips and other discrete devices.

[0132] In addition, the actions and terms involved in the various embodiments of this application can refer to each other without limitation. The message names or parameter names in the messages exchanged between the various devices in the embodiments of this application are only examples, and other names can also be used in specific implementations without limitation.

[0133] In conjunction with the communication system shown in Figure 2, with reference to Figure 4 below, the communication method provided in an embodiment of the present application is described, wherein the terminal device can be any terminal device in the communication system shown in Figure 2, and the network device can be a service network device of the terminal device, or described as a terminal device belonging to a network device. The terminal devices and network devices described in the following embodiments can all have the components shown in Figure 3. The processing performed by a single execution subject (terminal device or network device) shown in the embodiment of the present application can also be divided into executions by multiple execution subjects, and these execution subjects can be logically and / or physically separated without restriction.

[0134] FIG4 is a flow chart of a communication method provided in an embodiment of the present application. As shown in FIG4 , the method may include:

[0135] Step 401: The network device sends first indication information to the terminal device; correspondingly, the terminal device receives the first indication information from the network device.

[0136] The first indication information may be used to indicate that the terminal device reports a power loss factor corresponding to a port configured for the terminal device. The power loss factor corresponding to the port may be used to indicate a power difference between the port and the first port, or may be described as indicating a power ratio between the port and the first port. The power difference and the power ratio may be converted to each other, that is, the corresponding power ratio may be determined based on the power difference, or the corresponding power difference may be determined based on the power ratio.

[0137] The power difference and the power ratio can be linear values ​​or dB values. For example, the power loss factor corresponding to the port can be used to indicate that the power ratio between the port with port index k and the port with port index n is or The power loss factor corresponding to the port can be used to indicate that the power difference between the port with port index k and the port with port index n is P k -P n , or 10log 10 P k -10log 10 P n In addition, the power loss factor can also be expressed by the amplitude loss factor, the amplitude loss factor γ A and power loss factor γ P Satisfaction relationship: log 10 Represents base 10 logarithm operation.

[0138] Optionally, the first port may be predefined by a protocol, or may be determined by a network device, or may be determined by a terminal device. For details, please refer to the detailed description of the first port in step 402 below, which will not be repeated here.

[0139] In one possible design, the terminal device may send a power headroom report (PHR) to the network device, and the network device determines whether to send first indication information to the terminal device based on the power headroom report.

[0140] The power headroom report may be used to indicate the power headroom or the power headroom range.

[0141] Among them, the power headroom reporting process is used to report to the network device the power difference information between the maximum transmit power of the terminal device and the uplink data transmission or uplink SRS signal transmission power of each activated serving cell, also known as power headroom information (such as the above-mentioned power headroom or power headroom range). The network device can determine whether to send the first indication information to the terminal device based on the power headroom report reported by the terminal device. The network device can also perform closed-loop power control based on the power headroom report reported by the terminal device and information such as the measured signal-to-noise ratio or signal-to-interference-and-noise ratio, so as to perform reasonable and effective resource scheduling for the terminal device.

[0142] Based on the NR protocol, power headroom reports can be divided into three types: Type 1 PHR, Type 2 PHR, and Type 3 PHR. Among them, Type 3 PHR corresponds to the power headroom report of SRS signal transmission. In the embodiment of the present application, the terminal device can report a power headroom report of type Type 3 PHR to the network device, and the network device determines whether to send the first indication information to the terminal device based on the power headroom report.

[0143] Among them, the terminal device can determine the expected transmission power of the SRS signal based on the actual channel propagation environment (such as path loss, etc.). If the expected transmission power of the SRS signal is greater than the maximum transmission power of the terminal device, the maximum transmission power of the terminal device is determined as the transmission power of the SRS signal. If the expected transmission power of the SRS signal is less than or equal to the maximum transmission power of the terminal device, the expected transmission power of the SRS signal is determined as the transmission power of the SRS signal, that is, the transmission power of the SRS signal needs to be less than or equal to the maximum transmission power of the terminal device.

[0144] The terminal device may also determine the difference between the maximum transmit power of the terminal device and the expected transmit power of the SRS signal as the power headroom of the SRS signal. If the expected transmit power of the SRS signal is less than or equal to the maximum transmit power of the terminal device, the power headroom is a value greater than or equal to 0, indicating that full power transmission has not been achieved. If the expected transmit power of the SRS signal is greater than the maximum transmit power of the terminal device, the power headroom is a value less than 0, indicating that full power transmission has been achieved.

[0145] For example, the terminal device may refer to the following formula (1) to calculate the maximum transmit power P of the terminal device: CMAX,f,c (i) and the expected transmission power of the SRS signal The minimum value of the SRS signal transmission power P is determined as SRS,b,f,c (i,q s ,l), the terminal device can also refer to the following formula (2) to determine the difference between the maximum transmit power of the terminal device and the expected transmit power of the SRS signal as the power margin PH of the SRS signal type3,b,f,c (i,q s ,l):

[0146] Formula (1):

[0147] Formula (2):

[0148] PH type3,b,f,c (i,q s ,l)=P CMAX,f,c (i)-{P O_SRS,b,f,c (q s )+10log 10 (2 μ ·M SRS,b,f,c (i))+α SRS,b,f,c (q s )·PL b,f,c (q d )+h b,f,c (i,l)};

[0149] Among them, P SRS,b,f,c (i,q s ,l) represents the transmission power of the SRS signal sent by the terminal device in the cell identified as c, the carrier frequency as f and the bandwidth part (BWP) identified as b, i represents the timing of SRS signal transmission, q s Indicates the index of the SRS resource set to which the SRS signal belongs, l indicates the SRS power control adjustment state, min indicates the minimum value. CMAX,f,c(i) represents the maximum output power of the terminal device (i.e., the maximum transmit power of the terminal device) when the serving cell is c, the carrier is f, and the SRS signal transmission timing is i. The maximum output power is related to the transmit capability of the terminal device and the carrier / cell corresponding to the terminal device. O_SRS,b,f,c (q s ) represents the target received power value of the SRS signal in the serving cell c, carrier f and BWP b. SRS,b,f,c (i) represents the number of resource blocks (RBs) occupied by the SRS signal at serving cell c, carrier f, BWP b, and SRS signal transmission timing i. SRS,b,f,c (q s ) represents the path loss compensation factor with serving cell c, carrier f and BWP b, which can be configured by the network device through radio resource control (RRC) signaling.

[0150] Wherein, μ represents the value corresponding to the subcarrier spacing (SCS) configuration. For example, the corresponding relationship between the subcarrier spacing and μ can be shown in the following Table 1:

[0151] Table 1

[0152] Among them, PL b,f,c (q d ) indicates that the terminal device is based on the index value q of the downlink reference signal d The calculated downlink path loss estimate value is used as the path loss compensation value for uplink power control. This parameter can be called a path loss parameter. The downlink reference signal that can be associated for measurement can be a (synchronization signal / PBCH block, SSB) signal or a channel state information reference signal (CSI-RS). The value of each downlink reference signal ID is mapped to an SSB resource index, and each SSB resource index is configured by the parameter ssb-Index; or, the value of each downlink reference signal ID is mapped to a CSI-RS resource index, and each CSI-RS resource index is configured by the parameter csi-RS-Index. In a group of downlink reference signal resource indexes, the terminal device can determine a downlink reference signal ID by the SSB resource index or the CSI-RS resource index. For example, PL b,f,c (q d ) can satisfy the following formula: PL b,f,c (qd )=reference Signal Power-higher layer filtered RSRP. Reference Signal Power represents the transmit power of the downlink reference signal configured by higher layer signaling, and higher layer filtered RSRP represents the received power of the reference signal after higher layer filtering received by the terminal device.

[0153] Among them, h b,f,c (i,l) represents the closed-loop control parameter, which is the dynamic power adjustment value indicated by the network device via downlink control information (DCI). SRS signal power control can follow the closed-loop power control instructions of the physical uplink shared channel (PUSCH) or be determined independently by the closed-loop power control instructions.

[0154] Based on the above description, when a terminal device reports a power headroom report to a network device, it may report a power headroom or a power headroom range. The power headroom range may include a maximum power headroom value and a minimum power headroom value, and any power headroom greater than or equal to the minimum power headroom value and less than or equal to the maximum power headroom value may be considered to be within the power headroom range.

[0155] Alternatively, a quantization method may be used to define different power headroom quantization levels for the power headroom report, and each power headroom quantization level may correspond to a power headroom or a power headroom range. When the terminal device reports the power headroom report to the network device, the power headroom quantization level may be indicated through indication information. The network device determines the power headroom quantization level based on the indication information, and then determines the power headroom or power headroom range indicated by the terminal device based on the correspondence between the power headroom quantization level and the power headroom or power headroom range. This allows the power headroom or power headroom range to be indicated using a smaller number of bits, thereby reducing signaling overhead.

[0156] For example, as shown in Table 2 below, 64 power headroom quantization levels are defined, which can be indicated by 6 bits of indication information. Taking each power headroom quantization level corresponding to a power headroom range as an example, the power headroom ranges corresponding to the 64 power headroom quantization levels can be shown in Table 3 below:

[0157] Table 2 Power headroom quantization levels

[0158] Table 3 Correspondence between power headroom quantization level and power headroom range

[0159] Based on the above description of the power margin report, the network device can send a first indication message to the terminal device when it determines that the power margin or the power margin range meets the first condition, thereby realizing dynamic sending of the first indication message, and further realizing dynamic reporting of the power loss factor corresponding to the port configured by the terminal device.

[0160] Exemplarily, the power headroom or power headroom range satisfies the first condition, which may include any one of the following: the power headroom is less than the first threshold; or the minimum value of the power headroom range is less than the second threshold; or the maximum value of the power headroom range is less than the third threshold.

[0161] Among them, the first threshold, the second threshold, or the third threshold can be predefined (such as predefined according to the insertion loss between the antennas of the terminal device, or described as predefined according to the maximum value of the power loss factor corresponding to the port configured by the terminal device); or, the first threshold, the second threshold, or the third threshold can also be determined by the network device according to the maximum value of the power loss factor corresponding to the port configured by the terminal device (the maximum value can be determined according to the insertion loss between the antennas of the terminal device), or, the first threshold, the second threshold or the third threshold can also be determined by the network device according to the power loss factor interval where the maximum value of the power loss factor corresponding to the port configured by the terminal device is located, without restriction.

[0162] The terminal device may proactively report third indication information to the network device to indicate the maximum value of the power loss factor corresponding to the port configured on the terminal device or the power loss factor interval within which the maximum value lies. Alternatively, the network device may also send sixth indication information to the terminal device to instruct the terminal device to report the maximum value of the power loss factor corresponding to the port. In response to the sixth indication information, the terminal device reports third indication information to the network device to indicate the maximum value of the power loss factor corresponding to the port configured on the terminal device or the power loss factor interval within which the maximum value lies. The network device may then determine the first threshold, the second threshold, or the third threshold based on the third indication information.

[0163] The power loss factor interval may include a maximum power loss factor and a minimum power loss factor, and power loss factors greater than or equal to the minimum power loss factor and less than or equal to the maximum power loss factor may be considered as belonging to the power loss factor interval.

[0164] Optionally, the terminal device may report the maximum value of the power loss factor corresponding to the port to the network device through a third indication message. Alternatively, referring to the above-mentioned quantization method for reporting power margin, a quantization method may also be used to define different power loss factor quantization levels for the power loss factor, and each power loss factor quantization level may correspond to a power loss factor or a power loss factor interval. The terminal device may report the power loss factor quantization level corresponding to the maximum value of the power loss factor corresponding to the port to the network device through a third indication message, and the network device determines the power loss factor quantization level based on the third indication message, and then determines the maximum value of the power loss factor corresponding to the port indicated by the terminal device or the power loss factor interval where the maximum value is located based on the correspondence between the power loss factor quantization level and the power loss factor or the power loss factor interval. If the network device determines the maximum value of the power loss factor corresponding to the port configured by the terminal device based on the third indication information, the above-mentioned first threshold, second threshold or third threshold can be determined based on the maximum value. If the network device determines the power loss factor interval in which the maximum value of the power loss factor corresponding to the port configured by the terminal device is located based on the third indication information, the network device can determine the above-mentioned first threshold, second threshold or third threshold based on any value in the power loss factor interval (such as the maximum value or minimum value of the power loss factor interval, etc.).

[0165] Optionally, the first threshold, the second threshold and the third threshold may be the same (such as the maximum value of the power loss factor corresponding to the port configured for the terminal device, or the maximum value or minimum value in the power loss factor range in which the power loss factor corresponding to the port configured for the terminal device is located), or they may be different without restriction.

[0166] Optionally, the first indication information may be downlink control information (DCI) signaling, or media access control element (MAC-CE) signaling, etc., without limitation.

[0167] In one possible design, when the network device determines that the power margin or power margin range reported by the terminal device meets the first condition, it means that the expected transmit power of the SRS signal does not have sufficient transmit power margin compared to the maximum transmit power limit of the terminal device, and the terminal device cannot fully pre-compensate the power loss between antennas (such as the terminal device is completely unable to pre-compensate the power loss between antennas, or the terminal device can only pre-compensate a part of the power loss based on the maximum transmit power and cannot fully pre-compensate). At this time, the network device can send a first indication message to the terminal device, instructing the terminal device to report the power loss factor corresponding to the port, and the network device performs power compensation on the channel estimation result determined based on the SRS signal according to the power loss factor corresponding to the port, thereby reducing the channel estimation error caused by the power loss between antennas, improving the accuracy of the channel estimation result, and improving communication performance.

[0168] In another possible design, when the network device determines that the power margin or power margin range reported by the terminal device does not meet the first condition, it indicates that the expected transmit power of the SRS signal has sufficient transmit power margin compared to the maximum transmit power limit of the terminal device, and the terminal device is capable of performing complete power pre-compensation for the power loss between antennas when sending the SRS signal. At this time, the network device does not need to send the first indication information to the terminal device, and the terminal device does not need to report the power loss factor corresponding to the port to the network device. Compared with power compensation on the network device side, power pre-compensation on the terminal device side can achieve better performance.

[0169] For example, taking the example of the network device sending the first indication information to the terminal device when determining that the minimum value of the power margin range is less than the second threshold, considering that the insertion loss between the antennas of the terminal device usually does not exceed a certain value (such as 6dB), or the maximum value of the power loss factor corresponding to the port sent by the terminal device received by the network device is the certain value, the network device can determine that the second threshold is the certain value.

[0170] Taking the second threshold determined by the network device as 6dB as an example, the terminal device can report Type 3PHR to the network device, as shown in Figure 5. If the power margin report reported by the terminal device corresponds to POWER_HEADROOM_53 in Table 3, the network device can determine that the power margin range reported by the terminal device is 20≤PH<21, indicating that the remaining transmit power margin range is 20dB~21dB from the maximum transmit power limit. Since the minimum value of the reported power margin range of 20dB is greater than 0, it has not reached full power and there is still power margin, and the minimum value of 20dB is greater than the second threshold of 6dB, the terminal device is capable of performing complete power pre-compensation for the power loss between antennas when sending SRS signals. At this time, the network device does not need to send the first indication information to the terminal device, and the terminal device can perform power pre-compensation (such as performing complete power pre-compensation as much as possible) when sending the SRS signal to obtain better performance.

[0171] As shown in Figure 6, if the power margin report reported by the terminal device corresponds to POWER_HEADROOM_30 in Table 3, the network device can determine that the power margin range reported by the terminal device is 1≤PH<2, indicating that the range of the remaining transmit power margin is 1dB~2dB from the maximum transmit power limit. Since the minimum value 1dB of the reported power margin is greater than 0, it has not reached full power and there is still power margin, but the minimum value 1dB is less than the second threshold 6dB, and the power margin is insufficient to support the terminal device to perform complete power pre-compensation for the power loss between antennas. At this time, the network device can send a first indication message to the terminal device, instructing the terminal device to report the power loss factor corresponding to the port, and the network device will perform power compensation on the channel estimation result determined based on the SRS signal according to the power loss factor corresponding to the port, thereby reducing the channel estimation error caused by the power loss between antennas, improving the accuracy of the channel estimation result, and improving communication performance.

[0172] In the above description of the power margin or power margin range satisfying the first condition, the power margin or power margin range is determined based on the difference between the maximum transmit power of the terminal device and the expected transmit power of the SRS signal (the difference = the maximum transmit power of the terminal device - the expected transmit power of the SRS signal). Optionally, the power margin or power margin range may also be determined based on the difference between the expected transmit power of the SRS signal and the maximum transmit power of the terminal device (the difference = the expected transmit power of the SRS signal - the maximum transmit power of the terminal device). In this case, the power margin or power margin range satisfying the first condition may include any one of the following: the power margin is less than the fourth threshold; or, the maximum value of the power margin range is less than the fifth threshold; or, the minimum value of the power margin range is less than the sixth threshold.

[0173] Among them, the fourth threshold, the fifth threshold, or the sixth threshold can be predefined (such as predefined according to the insertion loss between the antennas of the terminal device, or described as predefined according to the maximum value of the power loss factor corresponding to the port configured by the terminal device); or, the fourth threshold, the fifth threshold, or the sixth threshold can also be determined by the network device according to the maximum value of the power loss factor corresponding to the port configured by the terminal device (the maximum value can be determined according to the insertion loss between the antennas of the terminal device), or, the fourth threshold, the fifth threshold, or the sixth threshold can also be determined by the network device according to the power loss factor interval in which the maximum value of the power loss factor corresponding to the port configured by the terminal device is located, without restriction.

[0174] Optionally, the fourth threshold, the fifth threshold and the sixth threshold may be the same (such as the maximum value of the power loss factor corresponding to the port configured for the terminal device, or the maximum value or minimum value in the power loss factor range in which the power loss factor corresponding to the port configured for the terminal device is located), or they may be different without restriction.

[0175] Optionally, the fourth threshold may be the inverse of the first threshold, the fifth threshold may be the inverse of the second threshold, and the sixth threshold may be the inverse of the third threshold.

[0176] For two numbers with opposite values ​​(ie, the same number but opposite signs), one of the numbers can be said to be the opposite of the other. For example, taking the second threshold as 6 dB, the fifth threshold can be -6 dB.

[0177] Optionally, unlike the above-mentioned network device sending the first indication information to the terminal device when the power margin or power margin range reported by the terminal device meets the first condition, the network device may also send the first indication information to the terminal device when the power margin or power margin range does not meet the first condition, that is, regardless of whether the power margin or power margin range reported by the terminal device meets the first condition, the network device may send the first indication information to the terminal device, instructing the terminal device to report the power loss factor corresponding to the port.

[0178] Compared to the scheme where "the network device can send the first indication information to the terminal device regardless of whether the power margin or power margin range reported by the terminal device meets the first condition", in the scheme where "the network device sends the first indication information to the terminal device when the power margin or power margin range reported by the terminal device meets the first condition", the network device can determine whether the terminal device is capable of performing complete power pre-compensation for the power loss between antennas based on the power margin or power margin range reported by the terminal device. If the terminal device is capable of performing complete power pre-compensation, the network device does not need to send the first indication information to the terminal device, thereby reducing signaling overhead and avoiding the terminal device from constantly reporting the power loss factor corresponding to the port, thereby reducing reporting overhead. At the same time, power compensation for the power loss between antennas can be performed on the terminal device side as much as possible. Complete power pre-compensation by the terminal device can reduce the channel estimation error caused by the power loss between antennas, improve the accuracy of the channel estimation results, and avoid the impact of power compensation on the network device side on the accuracy of the channel estimation results due to amplification of interference and noise, thereby improving communication performance.

[0179] If the terminal device is not capable of performing complete power pre-compensation, the network device can send a first indication message to the terminal device, instructing the terminal device to report the power loss factor corresponding to the port, and the network device performs power compensation on the channel estimation result determined based on the SRS signal according to the power loss factor corresponding to the port. Although the network device will amplify interference and noise when performing power compensation, which will have a certain impact on the accuracy of the channel estimation result, since the terminal device is no longer capable of performing complete power pre-compensation, if the network device does not perform power compensation, the impact on the accuracy of the channel estimation result due to the power loss between antennas will be greater. Therefore, the network device can perform power compensation to minimize the channel estimation error caused by the power loss between antennas, improve the accuracy of the channel estimation result, and improve communication performance.

[0180] Optionally, the terminal device may also send capability information to the network device, where the capability information may be used to indicate whether the terminal device supports reporting the power loss factor corresponding to the port configured on the terminal device.

[0181] If the capability information of the terminal device indicates that the terminal device supports reporting the power loss factor corresponding to the port, the network device may send the first indication information to the terminal device. If the capability information of the terminal device indicates that the terminal device does not support reporting the power loss factor corresponding to the port, the network device does not need to send the first indication information to the terminal device.

[0182] Optionally, the capability information of the terminal device may also include third indication information, which may be used to indicate the maximum value of the power loss factor corresponding to the port configured for the terminal device, or the third indication information may also be used to indicate the power loss factor interval in which the maximum value of the power loss factor corresponding to the port configured for the terminal device is located.

[0183] The description of the third indication information may refer to the aforementioned description of the third indication information and will not be repeated here.

[0184] Optionally, the third indication information may be an insertion loss power reporting (IL power reporting) parameter in the UE capability parameters.

[0185] Exemplarily, the maximum value of the power loss factor corresponding to the port configured for the terminal device may be any one of the following: 3dB, 4dB, 6dB, or 0dB, etc., without limitation.

[0186] In one possible design, the seventh indication information may be carried in the capability information to indicate whether the terminal device supports reporting the power loss factor corresponding to the port.

[0187] Exemplarily, taking the seventh indication information as 1 bit as an example, the value of this 1 bit can be set to 0 to indicate that the terminal device does not support the power loss factor corresponding to the reporting port, and the value of this 1 bit can be set to 1 to indicate that the terminal device supports the power loss factor corresponding to the reporting port. Alternatively, the value of this 1 bit can be set to 1 to indicate that the terminal device does not support the power loss factor corresponding to the reporting port, and the value of this 1 bit can be set to 0 to indicate that the terminal device supports the power loss factor corresponding to the reporting port, etc., without limitation.

[0188] In this possible design, the above-mentioned third indication information can also be carried in the capability information to indicate the maximum value of the power loss factor corresponding to the port configured by the terminal device, or to indicate the power loss factor interval in which the maximum value of the power loss factor corresponding to the port configured by the terminal device is located.

[0189] In another possible design, the third indication information in the capability information can also indicate (e.g., implicitly indicate) whether the terminal device supports reporting the power loss factor corresponding to the port configured for the terminal device, while indicating the maximum value of the power loss factor corresponding to the port or the power loss factor range in which the maximum value is located. There is no need to add additional indication information (such as the seventh indication information mentioned above) to indicate whether the terminal device supports reporting the power loss factor corresponding to the port, so as to reduce signaling overhead.

[0190] Among them, whether the terminal device supports reporting the power loss factor corresponding to the port can be determined based on the maximum value of the power loss factor corresponding to the port indicated by the third indication information or the power loss factor interval where the maximum value is located.

[0191] For example, if the maximum value of the power loss factor corresponding to the port indicated by the third indication information is a certain specific value (such as 0dB), it may indicate that the terminal device does not support reporting the power loss factor corresponding to the port. If the maximum value of the power loss factor corresponding to the port indicated by the third indication information is not the certain specific value (such as 0dB), it may indicate that the terminal device supports reporting the power loss factor corresponding to the port.

[0192] In another example, if the power loss factor interval in which the maximum value of the power loss factor corresponding to the port indicated by the third indication information is located is a certain specific interval, it may indicate that the terminal device does not support reporting the power loss factor corresponding to the port; if the maximum value of the power loss factor corresponding to the port indicated by the third indication information is not the certain specific interval, it may indicate that the terminal device supports reporting the power loss factor corresponding to the port.

[0193] Based on the above description of capability information, by reporting capability information to the network device, the terminal device can inform the network device whether it can support power loss factor reporting, so that the network device can trigger the terminal device to flexibly report the power loss factor corresponding to the port that needs further compensation. In addition, the terminal device can further indicate the maximum value of the power loss factor corresponding to its own port through capability information, so that the network device can determine whether the terminal device is capable of complete power pre-compensation based on this maximum value and the power headroom report reported by the terminal device, thereby triggering the terminal device's power loss factor reporting at the appropriate time, avoiding the large reporting overhead caused by the terminal device's continuous reporting.

[0194] Step 402: The terminal device sends second indication information to the network device; correspondingly, the network device receives the second indication information from the terminal device.

[0195] In which, the second indication information can be used to indicate the power loss factor corresponding to the port configured by the terminal device, and the power loss factor corresponding to the port can be used to indicate the power difference between the port and the first port, or described as the power loss factor corresponding to the port is used to indicate the power ratio between the port and the first port.

[0196] The network device can configure SRS resources for the terminal device. Each SRS resource can include Each port can correspond to a physical antenna or a virtual antenna of the terminal device. The terminal device can determine the port configured for the terminal device based on the SRS resources configured by the network device.

[0197] In a first possible design, the first port may be a reference port, and the reference port may be a port with a port index of a specific port index. For example, the reference port may be a port with a port index of k, and the port with port index k may also be called port k.

[0198] The reference port can be any port configured on the terminal device. The reference port can be predefined by the protocol, determined by the network device, or determined by the terminal device, without limitation. For example, the port corresponding to the primary antenna of the terminal device can be determined as the reference port.

[0199] For example, taking the example of the ports configured on the terminal device including port 0, port 1, port 2 and port 3, port 0 can be used as the reference port, and the power loss factor corresponding to port 1 can be the power difference or power ratio between port 1 and port 0, the power loss factor corresponding to port 2 can be the power difference or power ratio between port 2 and port 0, and the power loss factor corresponding to port 3 can be the power difference or power ratio between port 3 and port 0.

[0200] In this possible design, since the power loss factor corresponding to a port is used to indicate the power difference or power ratio between the port and the first port, when a port of the terminal device is determined to be a reference port, the power loss factor corresponding to the port can be 0dB (i.e., the power difference) or 1 (i.e., the power ratio). When the terminal device sends the second indication information to the network device, it can indicate the power loss factors corresponding to ports other than the reference port, or the terminal device can also indicate the power loss factors corresponding to all ports of the terminal device.

[0201] For example, taking the case where a network device configures an nTmR antenna switching SRS for a terminal device, which includes m / n SRS resources and each SRS resource includes n ports, the terminal device can send a second indication message (e.g., an SRS power difference (SRSPowerDifference) signaling field) to the network device to indicate the power loss factor corresponding to the port configured by the terminal device. Taking port 0 as the reference port, the second indication message can be used to indicate the power loss factors corresponding to m-1 ports, where the m-1 ports do not include port 0, and the kth power loss factor among the power loss factors corresponding to the m-1 ports can represent the power loss factor corresponding to the k+1th port in the configured SRS resource compared to the reference port.

[0202] For example, taking the case where the network device configures a 1T4R antenna for the terminal device and selects SRS corresponding to port 0, port 1, port 2, and port 3, respectively, and assuming that port 0 is determined as the reference port, the terminal device can indicate to the network device through the second indication information the power loss factor corresponding to port 1 (e.g., 3dB), the power loss factor corresponding to port 2 (e.g., 4dB), and the power loss factor corresponding to port 3 (e.g., 4dB). Alternatively, the terminal device can also indicate to the network device through the second indication information the power loss factor corresponding to port 0 (e.g., 0dB), the power loss factor corresponding to port 1 (e.g., 3dB), the power loss factor corresponding to port 2 (e.g., 4dB), and the power loss factor corresponding to port 3 (e.g., 4dB).

[0203] Compared with the terminal device reporting the power loss factors corresponding to all ports to the network device, the terminal device reporting the power loss factors corresponding to ports other than the reference port can reduce the amount of information reported and reduce signaling overhead.

[0204] In a second possible design, the first port may also be an adjacent port of the port.

[0205] The adjacent ports of different ports may be the same or different, without limitation.

[0206] Among them, the adjacent port of a port can be determined according to the port index of the port. For example, taking the port index of a port as k, the adjacent port of the port can be the port with port index k-1 or k+1, and the port with port index k-1 or k+1 can also be called port k-1 or port k+1.

[0207] Optionally, when there are at least two ports corresponding to different first ports, the network device can determine the power loss factor of each port relative to the same first port based on the power loss factor corresponding to the port reported by the terminal device, so as to facilitate subsequent power compensation.

[0208] For example, if a terminal device is configured to include port 1, port 2, port 3, and port 4, port 1, which is adjacent to port 2, can be used as the first port of port 2. The power loss factor corresponding to port 2 can be used to indicate the power difference or power ratio between port 2 and port 1. Port 2, which is adjacent to port 3, can be used as the first port of port 3. The power loss factor corresponding to port 3 can be used to indicate the power difference or power ratio between port 3 and port 2. Port 3, which is adjacent to port 4, can be used as the first port of port 4. The power loss factor corresponding to port 4 can be used to indicate the power difference or power ratio between port 4 and port 3.

[0209] In this possible design, when the terminal device sends the second indication information to the network device, it can indicate the power loss factors corresponding to all ports. Alternatively, it can also indicate the power loss factors corresponding to some ports without indicating the power loss factor corresponding to at least one first port, so as to reduce the amount of information reported and reduce signaling overhead.

[0210] For example, taking the case where the ports configured on the terminal device include port 1, port 2, port 3, and port 4, and port 1 is the first port of port 2, port 2 is the first port of port 3, and port 3 is the first port of port 4, the terminal device can report the power loss factors corresponding to port 2, port 3, and port 4 to the network device through the second indication information, without reporting the power loss factor corresponding to port 1. After receiving the second indication information, the network device can determine whether the power loss factor corresponding to port 1 is 0dB (i.e., power difference) or 1 (i.e., power ratio); determine the power difference or power ratio between port 2 and port 1 based on the power loss factor corresponding to port 2; determine the power difference or power ratio between port 3 and port 1 (i.e., the power loss factor of port 3 relative to port 1) based on the power loss factor corresponding to port 2 and the power loss factor corresponding to port 3; and determine the power difference or power ratio between port 4 and port 1 (i.e., the power loss factor of port 4 relative to port 1) based on the power loss factor corresponding to port 2, the power loss factor corresponding to port 3, and the power loss factor corresponding to port 4, to facilitate subsequent power compensation.

[0211] Based on the above two possible designs, the first port may be predefined by a protocol, may be determined by a network device, or may be determined by a terminal device, without limitation.

[0212] Optionally, if the first port is determined by the network device, the network device may send fourth indication information to the terminal device for indicating the first port. The terminal device may determine the first port based on the fourth indication information, and further determine the power loss factor corresponding to the port configured on the terminal device.

[0213] Optionally, if the first port is determined by the terminal device, the terminal device may determine the power loss factor corresponding to the port configured for the terminal device based on the first port. The terminal device may also send fifth indication information indicating the first port to the network device. The network device may determine the first port based on the fifth indication information, and further determine the first port corresponding to each received power loss factor.

[0214] In one possible implementation, when the terminal device determines the power loss factor corresponding to the port, it may not perform power pre-compensation on the port, but directly report the power loss factor determined based on the insertion loss to the network device.

[0215] In another possible implementation, when determining the power loss factor corresponding to a port, the terminal device can flexibly perform full or partial power pre-compensation on each port based on the actual power margin and transmit power requirements, and determine the power loss factor corresponding to the port based on the transmit power after pre-compensation. This minimizes the channel estimation error caused by inter-antenna power loss, improves the accuracy of the channel estimation result, and enhances communication performance.

[0216] In which, the terminal device can perform power pre-compensation on the uplink reference signal corresponding to one or more ports of the terminal device, determine the transmit power corresponding to each port, determine the power loss factor corresponding to each port based on the transmit power corresponding to each port and the transmit power corresponding to the first port, and send second indication information to the network device based on the power loss factor corresponding to each port.

[0217] Optionally, the terminal device may send the second indication information to the network device via a physical uplink control channel (PUCCH) or an uplink data channel (such as PUSCH).

[0218] Optionally, as shown in FIG7 , the method further includes step 403 , where the network device performs power compensation on the uplink reference signal from the terminal device according to the power loss factor.

[0219] The network device may perform power compensation on the uplink reference signal corresponding to each port according to the power loss factor corresponding to each port.

[0220] Exemplarily, the network device may perform power compensation on a channel matrix obtained by performing channel measurement based on an uplink reference signal (such as an SRS signal) according to a power loss factor reported by the terminal device.

[0221] For example, taking the example of a network device configuring four ports for a terminal device, the terminal device can send SRS signals through the four ports, and the signal received by the network device can be the following y. Assuming that the network device determines that the power loss factors corresponding to the four ports are a1, a2, a3, and a4 respectively according to the second indication information reported by the terminal device, the network device can perform power compensation on the channel coefficient corresponding to each port according to the power loss factor to obtain the power-compensated signal z. It can be seen that after power compensation, the power loss between different antennas is equivalently leveled, thereby effectively reducing the channel estimation error caused by the power loss between antennas.

[0222] Among them, H represents the channel matrix corresponding to the four ports, s1, s2, s3, and s4 represent the SRS signals sent by the four ports respectively, and n represents the corresponding noise vector. represents the power compensation matrix, and n′ is the result of multiplying the power compensation matrix by n.

[0223] Based on the methods shown in Figures 4 to 7 above, the terminal device can send the power loss factor corresponding to the port configured by the terminal device to the network device, so that the network device can obtain the power loss factor reported by the terminal device, and thus can consider the power loss factor reported by the terminal device. For example, the network device performs power compensation on the channel estimation result determined based on the uplink reference signal (such as the SRS signal) according to the power loss factor reported by the terminal device, which can reduce the channel estimation error caused by the power loss between antennas, improve the accuracy of the channel estimation result, and improve communication performance.

[0224] In addition, in the embodiments of the present application, power compensation is used as an example for explanation. It can be understood that the power compensation is reflected in the signal and can also be described as signal amplitude compensation.

[0225] It should be noted that the various embodiments of this application can be implemented independently or in combination, without limitation. Unless otherwise specified or there is a logical conflict, the terms and / or descriptions of the different embodiments provided in this application are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships.

[0226] It is understood that in the embodiments of the present application, the execution subject may perform some or all of the steps in the embodiments of the present application. These steps or operations are merely examples, and the embodiments of the present application may also perform other operations or variations of various operations. In addition, the various steps may be performed in a different order than those presented in the embodiments of the present application, and it is possible that not all operations in the embodiments of the present application need to be performed.

[0227] The above mainly introduces the solution provided by the embodiment of the present application from the perspective of interaction between devices. It is understandable that, in order to realize the above functions, each device includes a hardware structure and / or software module corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. 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.

[0228] The embodiments of the present application can divide the functional modules of each device according to the above method examples. For example, each functional module can be divided according to each function, or two or more functions can be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiments of the present application is schematic and is only a logical function division. In actual implementation, there may be other division methods.

[0229] In the case of dividing each functional module according to each function, Figure 8 shows a communication device 80, which can execute the actions performed by the terminal device in the method shown in Figures 4 to 7 above, or execute the actions performed by the network device in the method shown in Figures 4 to 7 above. All relevant contents of each step involved in the above method embodiment can be referred to the functional description of the corresponding functional module, and the technical effects that can be obtained can be referred to the above method embodiment, which will not be repeated here.

[0230] The communication device 80 may include a transceiver module 801 and a processing module 802. Exemplarily, the communication device 80 may be a communication device, or a chip used in a communication device, or other combined device, component, etc. having the functions of the above-mentioned communication device. When the communication device 80 is a communication device, the transceiver module 801 may be a transceiver, which may include an antenna and a radio frequency circuit, etc.; the processing module 802 may be a processor (or a processing circuit), such as a baseband processor, which may include one or more CPUs. When the communication device 80 is a component having the functions of the above-mentioned communication device, the transceiver module 801 may be a radio frequency unit; the processing module 802 may be a processor (or a processing circuit), such as a baseband processor. When the communication device 80 is a chip system, the transceiver module 801 may be the input and output interface of the chip (such as a baseband chip); the processing module 802 may be the processor (or a processing circuit) of the chip system, which may include one or more central processing units. It should be understood that the transceiver module 801 in the embodiment of the present application can be implemented by a transceiver or a transceiver-related circuit component; the processing module 802 can be implemented by a processor or a processor-related circuit component (or, referred to as a processing circuit).

[0231] For example, the transceiver module 801 can be used to perform all transceiver operations performed by the communication device in the embodiments shown in Figures 4 to 7, and / or to support other processes of the technology described herein; the processing module 802 can be used to perform all operations other than transceiver operations performed by the communication device in the embodiments shown in Figures 4 to 7, and / or to support other processes of the technology described herein.

[0232] In the first example, the transceiver module 801 can be used to receive first indication information from the network device and can also be used to send second indication information to the network device. The first indication information is used to instruct the terminal device to report the power loss factor corresponding to the port configured on the terminal device, where the power loss factor corresponding to the port indicates the power difference between the port and the first port; and the second indication information is used to indicate the power loss factor corresponding to the port configured on the terminal device.

[0233] In one possible design, the transceiver module 801 can also be used to send capability information to the network device; wherein the capability information is used to indicate that the terminal device supports reporting the power loss factor corresponding to the port configured by the terminal device.

[0234] In one possible design, the capability information includes third indication information, and the third indication information is used to indicate the maximum value of the power loss factor corresponding to the port configured by the terminal device.

[0235] In one possible design, the first port is a reference port; or, the first port is an adjacent port of the port.

[0236] In one possible design, the transceiver module 801 can also be used to receive fourth indication information from the network device; wherein the fourth indication information is used to indicate the first port.

[0237] In one possible design, the transceiver module 801 can also be used to send fifth indication information to the network device; wherein the fifth indication information is used to indicate the first port.

[0238] In one possible design, the processing module 802 can be used to perform power compensation on the uplink reference signals corresponding to one or more ports of the terminal device, determine the transmit power corresponding to each port, and can also be used to determine the power loss factor corresponding to each port based on the transmit power corresponding to each port and the transmit power corresponding to the first port; the transceiver module 801 can specifically be used to send a second indication information to the network device based on the power loss factor corresponding to each port.

[0239] In the second example, the transceiver module 801 can be used to send first indication information to the terminal device, and can also be used to receive second indication information from the terminal device; wherein the first indication information is used to indicate that the terminal device reports the power loss factor corresponding to the port configured by the terminal device, and the power loss factor corresponding to the port is used to indicate the power difference between the port and the first port; the second indication information is used to indicate the power loss factor corresponding to the port configured by the terminal device.

[0240] In one possible design, the processing module 802 may be configured to perform power compensation on an uplink reference signal from a terminal device based on a power loss factor.

[0241] In one possible design, the transceiver module 801 can also be used to receive a power margin report from a terminal device; wherein the power margin report is used to indicate the power margin or the power margin range; when the processing module 802 determines that the power margin or the power margin range meets the first condition, the transceiver module 801 sends a first indication information to the terminal device.

[0242] In one possible design, the power margin or the power margin range satisfies a first condition, including: the power margin is less than a first threshold; or, the minimum value of the power margin range is less than a second threshold; or, the maximum value of the power margin range is less than a third threshold.

[0243] In one possible design, the first threshold, the second threshold, or the third threshold is predefined; or, the first threshold, the second threshold, or the third threshold is determined based on the maximum value of the power loss factor corresponding to the port configured by the terminal device.

[0244] In one possible design, the transceiver module 801 can also be used to receive capability information from the terminal device; wherein the capability information is used to indicate that the terminal device supports reporting the power loss factor corresponding to the port configured by the terminal device.

[0245] In one possible design, the capability information includes third indication information, and the third indication information is used to indicate the maximum value of the power loss factor corresponding to the port configured by the terminal device.

[0246] In one possible design, the first port is a reference port; or, the first port is an adjacent port of the port.

[0247] In one possible design, the transceiver module 801 can also be used to send fourth indication information to the terminal device; wherein the fourth indication information is used to indicate the first port.

[0248] In one possible design, the transceiver module 801 can also be used to receive fifth indication information from the terminal device; wherein the fifth indication information is used to indicate the first port.

[0249] As another possible implementation, the transceiver module 801 in FIG8 can be replaced by a transceiver that integrates the functionality of the transceiver module 801; the processing module 802 can be replaced by a processor that integrates the functionality of the processing module 802. Furthermore, the communication device 80 shown in FIG8 can also include a memory.

[0250] Alternatively, when the processing module 802 is replaced by a processor and the transceiver module 801 is replaced by a transceiver, the communication device 80 involved in the embodiment of the present application may also be the communication device 90 shown in Figure 9, wherein the processor may be the logic circuit 901 and the transceiver may be the interface circuit 902. Furthermore, the communication device 90 shown in Figure 9 may also include a memory 903.

[0251] The embodiments of the present application also provide a computer program product, which, when executed by a computer, can implement the functions of any of the above method embodiments.

[0252] The embodiments of the present application also provide a computer program, which, when executed by a computer, can implement the functions of any of the above method embodiments.

[0253] The embodiment of the present application also provides a computer-readable storage medium. All or part of the processes in the above-mentioned method embodiments can be completed by a computer program to instruct the relevant hardware, and the program can be stored in the above-mentioned computer-readable storage medium. When the program is executed, it can include the processes of the above-mentioned method embodiments. The computer-readable storage medium can be an internal storage unit of the terminal (including the data sending end and / or the data receiving end) of any of the above-mentioned embodiments, such as the hard disk or memory of the terminal. The above-mentioned computer-readable storage medium can also be an external storage device of the above-mentioned terminal, such as a plug-in hard disk equipped on the above-mentioned terminal, a smart memory card (smart media card, SMC), a secure digital (secure digital, SD) card, a flash card (flash card), etc. Further, the above-mentioned computer-readable storage medium can also include both the internal storage unit of the above-mentioned terminal and an external storage device. The above-mentioned computer-readable storage medium is used to store the above-mentioned computer program and other programs and data required by the above-mentioned terminal. The above-mentioned computer-readable storage medium can also be used to temporarily store data that has been output or is to be output.

[0254] It should be noted that the terms "first" and "second" in the specification, claims and drawings of this application are used to distinguish different objects, rather than to describe a specific order. "First" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this embodiment, unless otherwise specified, "multiple" means two or more.

[0255] Furthermore, the terms "include," "comprise," and "have," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements, but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to the process, method, product, or apparatus.

[0256] It should be understood that in this application, "at least one (item)" refers to one or more. "Multiple" refers to two or more. "At least two (items)" refers to two or three and more than three. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships can exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple. “When” and “if” both mean that corresponding measures will be taken under certain objective circumstances. They do not limit the time, nor do they require any judgment action when they are implemented, nor do they mean that there are other limitations.

[0257] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner to facilitate understanding.

[0258] In this application, "sending information to ... (a terminal device)" can be understood as the destination of the information being the terminal device. This can include sending information directly or indirectly to the terminal device. "Receiving information from ... (a terminal device)" can be understood as the source of the information being the terminal device. This can include receiving information directly or indirectly from the terminal device. The information may undergo necessary processing between the source and destination, such as formatting changes, but the destination can still understand the valid information from the source.

[0259] Through the description of the above implementation methods, technical personnel in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0260] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the modules or units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another device, 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.

[0261] The units described as separate components may or may not be physically separate, and the components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place or distributed in multiple places. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0262] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0263] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application or all or 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 enabling a device (which can be a single-chip microcomputer, chip, etc.) or a processor to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

Claims

1. A communication method, characterized in that: include: Receive first indication information from a network device; wherein the first indication information is used to instruct the terminal device to report a power loss factor corresponding to a port configured by the terminal device, and the power loss factor corresponding to the port is used to indicate a power difference between the port and the first port; Sending second indication information to the network device; wherein the second indication information is used to indicate the power loss factor corresponding to the port configured by the terminal device.

2. The method according to claim 1, characterized in that The method further comprises: Send capability information to the network device; wherein the capability information is used to indicate that the terminal device supports reporting the power loss factor corresponding to the port configured by the terminal device.

3. The method according to claim 2, characterized in that The capability information includes third indication information, and the third indication information is used to indicate the maximum value of the power loss factor corresponding to the port configured by the terminal device.

4. The method according to any one of claims 1 to 3, characterized in that: The first port is a reference port; or The first port is a neighboring port of the port.

5. The method according to any one of claims 1 to 4, characterized in that: The method further comprises: Receive fourth indication information from the network device; wherein the fourth indication information is used to indicate the first port.

6. The method according to any one of claims 1 to 4, characterized in that: The method further comprises: Send fifth indication information to the network device; wherein the fifth indication information is used to indicate the first port.

7. The method according to any one of claims 1 to 6, characterized in that: The sending the second indication information to the network device includes: Performing power compensation on uplink reference signals corresponding to one or more ports of the terminal device to determine the transmit power corresponding to each port; Determine a power loss factor corresponding to each of the ports according to a transmit power corresponding to each of the ports and a transmit power corresponding to the first port; The second indication information is sent to the network device according to the power loss factor corresponding to each of the ports.

8. A communication method, characterized in that: include: Sending first indication information to the terminal device; wherein the first indication information is used to indicate that the terminal device reports a power loss factor corresponding to a port configured by the terminal device, and the power loss factor corresponding to the port is used to indicate a power difference between the port and the first port; Receive second indication information from the terminal device; wherein the second indication information is used to indicate a power loss factor corresponding to a port configured on the terminal device.

9. The method according to claim 8, characterized in that The sending the first indication information to the terminal device includes: Receiving a power headroom report from the terminal device; wherein the power headroom report is used to indicate a power headroom or a power headroom range; When it is determined that the power margin or the power margin range satisfies the first condition, the first indication information is sent to the terminal device.

10. The method according to claim 9, characterized in that The power headroom or the power headroom range satisfies a first condition, including: The power headroom is less than a first threshold; or The minimum value of the power headroom range is less than a second threshold; or A maximum value of the power headroom range is smaller than a third threshold.

11. The method according to claim 10, characterized in that The first threshold, the second threshold, or the third threshold is predefined; or The first threshold, the second threshold, or the third threshold is determined according to a maximum value of a power loss factor corresponding to a port configured on the terminal device.

12. The method according to any one of claims 8 to 11, characterized in that: Before sending the first indication information to the terminal device, the method further includes: Receive capability information from the terminal device; wherein the capability information is used to indicate that the terminal device supports reporting a power loss factor corresponding to a port configured on the terminal device.

13. The method according to claim 12, characterized in that The capability information includes third indication information, and the third indication information is used to indicate the maximum value of the power loss factor corresponding to the port configured by the terminal device.

14. The method according to any one of claims 8 to 13, characterized in that: The first port is a reference port; or The first port is a neighboring port of the port.

15. The method according to any one of claims 8 to 14, characterized in that: The method further comprises: Send fourth indication information to the terminal device; wherein the fourth indication information is used to indicate the first port.

16. The method according to any one of claims 8 to 14, characterized in that: The method further comprises: Receive fifth indication information from the terminal device; wherein the fifth indication information is used to indicate the first port.

17. The method according to any one of claims 8 to 16, characterized in that: The method further comprises: According to the power loss factor, power compensation is performed on an uplink reference signal from the terminal device.

18. A communication device, characterized in that: include: A transceiver module, configured to receive first indication information from a network device; wherein the first indication information is used to instruct the terminal device to report a power loss factor corresponding to a port configured by the terminal device, and the power loss factor corresponding to the port is used to indicate a power difference between the port and the first port; The transceiver module is further used to send second indication information to the network device; wherein the second indication information is used to indicate the power loss factor corresponding to the port configured by the terminal device.

19. The device according to claim 18, characterized in that The transceiver module is further used to send capability information to the network device; wherein the capability information is used to indicate that the terminal device supports reporting the power loss factor corresponding to the port configured by the terminal device.

20. The device according to claim 19, characterized in that The capability information includes third indication information, and the third indication information is used to indicate the maximum value of the power loss factor corresponding to the port configured by the terminal device.

21. The device according to any one of claims 18 to 20, characterized in that The first port is a reference port; or The first port is a neighboring port of the port.

22. The device according to any one of claims 18 to 21, characterized in that The transceiver module is further used to receive fourth indication information from the network device; wherein the fourth indication information is used to indicate the first port.

23. The device according to any one of claims 18 to 21, characterized in that The transceiver module is further used to send fifth indication information to the network device; wherein the fifth indication information is used to indicate the first port.

24. The device according to any one of claims 18 to 23, characterized in that A processing module, used to perform power compensation on uplink reference signals corresponding to one or more ports of the terminal device, and determine a transmit power corresponding to each port; The processing module is further used to determine a power loss factor corresponding to each of the ports according to a transmission power corresponding to each of the ports and a transmission power corresponding to the first port; The transceiver module is further used to send the second indication information to the network device according to the power loss factor corresponding to each of the ports.

25. A communication device, characterized in that: include: A transceiver module, configured to send first indication information to a terminal device; wherein the first indication information is used to indicate that the terminal device reports a power loss factor corresponding to a port configured by the terminal device, and the power loss factor corresponding to the port is used to indicate a power difference between the port and the first port; The transceiver module is further used to receive second indication information from the terminal device; wherein the second indication information is used to indicate The power loss factor corresponding to the port configured on the terminal device.

26. The device according to claim 25, characterized in that The transceiver module is further used to receive a power headroom report from the terminal device; wherein the power headroom report is used to indicate a power headroom or a power headroom range; The transceiver module is also used to send the first indication information to the terminal device when the processing module determines that the power margin or the power margin range meets the first condition.

27. The device according to claim 26, characterized in that The power headroom or the power headroom range satisfies a first condition, including: The power headroom is less than a first threshold; or The minimum value of the power headroom range is less than a second threshold; or A maximum value of the power headroom range is smaller than a third threshold.

28. The device according to claim 27, characterized in that The first threshold, the second threshold, or the third threshold is predefined; or The first threshold, the second threshold, or the third threshold is determined according to a maximum value of a power loss factor corresponding to a port configured on the terminal device.

29. The device according to any one of claims 25 to 28, characterized in that The transceiver module is further used to receive capability information from the terminal device; wherein the capability information is used to indicate that the terminal device supports reporting the power loss factor corresponding to the port configured by the terminal device.

30. The device according to claim 28, characterized in that The capability information includes third indication information, and the third indication information is used to indicate the maximum value of the power loss factor corresponding to the port configured by the terminal device.

31. The device according to any one of claims 25 to 30, characterized in that The first port is a reference port; or The first port is a neighboring port of the port.

32. The device according to any one of claims 25 to 31, characterized in that The transceiver module is further used to send fourth indication information to the terminal device; wherein the fourth indication information is used to indicate the first port.

33. The device according to any one of claims 25 to 31, characterized in that The transceiver module is further used to receive fifth indication information from the terminal device; wherein the fifth indication information is used to indicate the first port.

34. The device according to any one of claims 25 to 33, characterized in that A processing module is used to perform power compensation on an uplink reference signal from the terminal device according to the power loss factor.

35. A communication device, characterized in that: The communication device comprises a processor; the processor is used to run a computer program or instruction so that the communication device executes the communication method as described in any one of claims 1 to 7, or executes the communication method as described in any one of claims 8 to 17.

36. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions or programs, and when the computer instructions or programs are executed on a computer, the communication method according to any one of claims 1 to 7 is executed, or the communication method according to any one of claims 8 to 17 is executed.

37. A computer program product, characterized in that The computer program product includes computer instructions; when part or all of the computer instructions are executed on a computer, the communication method according to any one of claims 1 to 7 is executed, or the communication method according to any one of claims 8 to 17 is executed.

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