Communication method, communication apparatus and communication system

Abstract

A communication method, a communication apparatus and a communication system, which are applied in the technical field of communications. The method comprises: a terminal apparatus determining that the path loss variation between the terminal apparatus and at least one of a plurality of TRPs is greater than or equal to a first threshold value; and the terminal apparatus sending power headroom (PH) information, and correspondingly, a network device receiving the PH information, wherein the PH information comprises a PH, and the type of the PH corresponds to the at least one TRP. By means of the embodiments of the present application, a terminal apparatus can report a PH more rationally.

Description

Communication method, communication device and communication system

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on February 4, 2024, with application number 202410160045.9, and priority to the Chinese patent application entitled “Communication Method, Communication Device and Communication System”, all 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, a communication device, and a communication system. Background Art

[0003] In the fifth-generation (5G) New Radio (NR) wireless communication system, user equipment (UE) reports its power headroom (PH) to the next-generation Node B (gNB). This process is also called a power headroom report (PHR). The PH is the difference between the terminal's nominal maximum transmit power and the estimated physical uplink shared channel (PUSCH) or sounding reference signal (SRS) transmission power. The base station performs closed-loop power control based on the reported power headroom, thereby scheduling resources for the terminal and reducing interference between the devices.

[0004] A communication system with asymmetric deployment of a single downlink (DL) transmission reception point (TRP) and multiple uplink (UL) TRPs may include a terminal device, a DL-TRP, and at least one UL-TRP. The DL-TRP is used to send downlink signals and receive uplink signals, and the at least one UL-TRP is used to receive uplink signals. In order to save costs, the at least one UL-TRP does not send downlink signals. Alternatively, the at least one UL-TRP does not have the ability to send downlink signals to the terminal device.

[0005] In a communication system with asymmetric deployment of single DL TRP and multiple UL TRPs, how the terminal device can reasonably report PH becomes an urgent problem to be solved. Summary of the Invention

[0006] The embodiments of the present application provide a communication method, a communication device, and a communication system, which enable a terminal device to report PH more reasonably.

[0007] In a first aspect, an embodiment of the present application provides a communication method, which is applied to a terminal device, wherein the terminal device has a communication connection with multiple TRPs. It is understood that the terminal device may include a terminal device or a chip (system) or circuit for a terminal device, and this application does not limit this. The method includes:

[0008] Determine whether a path loss change between the terminal device and at least one TRP among the multiple TRPs is greater than or equal to a first threshold; and send power margin PH information, where the PH information includes a PH, and a type of the PH corresponds to the at least one TRP.

[0009] In an embodiment of the present application, when the change in path loss between the terminal device and at least one TRP is greater than or equal to a first threshold, the terminal device may determine the type of PH to be reported based on the at least one TRP. For example, the type of PH may correspond to the communication mode or communication capability of the at least one TRP. For example, when the at least one TRP includes a TRP that only receives uplink signals but does not send downlink signals, the terminal device reports the PH of PUSCH. For another example, when the at least one TRP includes a TRP for sending downlink signals, the terminal device reports the PH of SRS. It can be understood that the terminal device determines the type of PH to be reported based on at least one TRP, so that the PH corresponding to the at least one TRP can be reported, so that the terminal device reports the PH more reasonably.

[0010] In combination with the first aspect, in a possible implementation, the at least one TRP includes a first TRP for sending a downlink signal, the first TRP corresponds to a first type of PH, and the first type of PH includes a PH of an SRS.

[0011] In an embodiment of the present application, SRS is used to estimate the downlink channel. The SRS is received by the first TRP. Therefore, when the change in path loss between the terminal device and the first TRP is greater than or equal to the first threshold, the terminal device reports the PH of the SRS to make the power control of the SRS more accurate.

[0012] In combination with the first aspect, in a possible implementation, the PH information also includes a second type of PH, the second type of PH corresponds to a second TRP among the multiple TRPs, the second type of PH includes a PH of a physical uplink shared channel PUSCH, and the second TRP receives the PUSCH.

[0013] In an embodiment of the present application, when the change in path loss between the terminal device and the first TRP is greater than or equal to a first threshold, the terminal device reports the PH of the SRS and the PH of the PUSCH to make the power control of the SRS and PUSCH more accurate.

[0014] In combination with the first aspect, in a possible implementation, the PUSCH PH includes the PUSCH PH on the first carrier, and the SRS PH includes the SRS PH on the first carrier and the second carrier; wherein the first carrier is used to transmit the PUSCH.

[0015] In an embodiment of the present application, a terminal device can transmit data on multiple carriers, the first carrier being a carrier configured with PUSCH transmission among the multiple carriers, and the second carrier being a carrier not configured with PUSCH transmission among the multiple carriers. The terminal device reports the PH of PUSCH and SRS on the first carrier and reports the PH of SRS on the carrier not configured with PUSCH transmission. The terminal device reports PH in units of carriers, so that the network equipment can perform power control of SRS and PUSCH with carrier as the granularity, making the power control of SRS and PUSCH more accurate. In addition, the terminal device does not need to report the PH of PUSCH on the carrier not configured with PUSCH transmission, which can save the overhead of PH reporting.

[0016] In combination with the first aspect, in a possible implementation, the at least one TRP includes a second TRP for receiving an uplink signal, the second TRP corresponds to a second type of PH, and the second type of PH includes a PH of a PUSCH.

[0017] In an embodiment of the present application, the PUSCH sent by the terminal device is received by the second TRP. Therefore, when the change in path loss between the terminal device and the second TRP is greater than or equal to the first threshold, the terminal device reports the PH of the PUSCH to make the power control of the PUSCH more accurate.

[0018] With reference to the first aspect, in a possible implementation manner, the PH of the PUSCH includes a PH of a PUSCH on a first carrier, where the first carrier is used to transmit the PUSCH.

[0019] In an embodiment of the present application, a terminal device may transmit data on multiple carriers, where the first carrier is a carrier configured for PUSCH transmission among the multiple carriers. PH information may include multiple PH values, each of which corresponds to a first carrier. The terminal device reports the PH of the PUSCH in units of carriers, enabling the network device to perform PUSCH power control at the carrier granularity, making the PUSCH power control more accurate.

[0020] In combination with the first aspect, in a possible implementation, the PH information also includes a first type of PH, the first type of PH corresponds to a first TRP among the multiple TRPs, the first type of PH includes a PH of SRS, and the first TRP is used to send a downlink signal.

[0021] In an embodiment of the present application, PUSCH is received by the second TRP. Therefore, when the change in path loss between the terminal device and the second TRP is greater than or equal to the first threshold, the terminal device reports the PH of PUSCH and the PH of SRS to make the power control of the PUSCH and SRS more accurate.

[0022] In conjunction with the first aspect, in a possible implementation, the method further includes:

[0023] Receive first indication information, where the first indication information includes at least one of the following: a path loss value from the terminal device to the second TRP, a difference between the path loss value from the terminal device to the second TRP and a reference path loss value, a difference between a compensated path loss value from the terminal device to the second TRP and a reference compensated path loss value, a difference between an expected received power from the terminal device to the second TRP and a reference expected received power, and a difference between a closed-loop power control adjustment amount from the terminal device to the second TRP and a reference closed-loop power control adjustment amount;

[0024] Determine the PH of the PUSCH based on the first indication information.

[0025] In an embodiment of the present application, the terminal device can determine the path loss value from the terminal device to the second TRP, the compensated path loss value from the terminal device to the second TRP, the expected receiving power from the terminal device to the second TRP, or the closed-loop power control adjustment amount from the terminal device to the second TRP based on the first indication information, and calculate the PH of the PUSCH based on the path loss value from the terminal device to the second TRP, the compensated path loss value from the terminal device to the second TRP, the expected receiving power from the terminal device to the second TRP, or the closed-loop power control adjustment amount from the terminal device to the second TRP, so that the PH of the PUSCH reported by the terminal device is more accurate.

[0026] In combination with the first aspect, in a possible implementation, the PH of the PUSCH is determined by the difference between the path loss value from the terminal device to the second TRP and the reference path loss value and the path loss value corresponding to the downlink reference signal.

[0027] In this embodiment of the present application, the PUSCH PH may be determined by a path loss value (also referred to as an uplink path loss value) between the terminal device and the second TRP. The path loss value between the terminal device and the second TRP may be determined by the difference between the path loss value from the terminal device to the second TRP and a reference path loss value, as well as the path loss value corresponding to the downlink reference signal. The terminal device determines the PUSCH PH based on the uplink path loss value, making the obtained PUSCH PH more accurate and more reflective of the actual PUSCH PH.

[0028] With reference to the first aspect, in a possible implementation, the SRS is used to estimate a downlink channel.

[0029] In conjunction with the first aspect, in a possible implementation, the method further includes:

[0030] Receive second indication information, where the second indication information indicates the multiple TRPs.

[0031] In an embodiment of the present application, the second indication information may indicate that the resident cell of the terminal device supports the terminal device to access multiple TRPs, or the second indication information is used to indicate that the cell accessed by the terminal device supports an asymmetric deployment scenario of a single DL TRP and multiple UL TRPs. The network device may indicate the multiple TRPs through the second indication information so that the terminal device can establish a communication connection with the multiple TRPs based on the second indication information.

[0032] With reference to the first aspect, in one possible implementation, determining that a change in path loss between the terminal device and at least one TRP among the multiple TRPs is greater than or equal to a first threshold includes:

[0033] It is determined that the path loss change is greater than or equal to the first threshold and the first timing times out.

[0034] In an embodiment of the present application, a terminal device sends PH information when it determines that the path loss change between the terminal device and at least one TRP is greater than or equal to a first threshold and a first timer has timed out. The terminal device determines whether the first timer has timed out, thereby determining whether to trigger PH reporting. This can avoid frequent PH reporting by the terminal device and save resources required for PH reporting.

[0035] In a second aspect, an embodiment of the present application provides a communication method for use in a network device. It is understood that the method can be executed by the network device, or by a chip (system) or circuit of the network device, and the present application does not limit this. The method includes:

[0036] Sending second indication information, wherein the second indication information indicates that there is a communication connection between the terminal device and the plurality of TRPs;

[0037] Power headroom PH information is received, where the PH information includes a PH, a type of the PH corresponds to at least one TRP, a path loss change between the terminal device and the at least one TRP is greater than or equal to a first threshold, and the at least one TRP is included in the multiple TRPs.

[0038] In combination with the second aspect, in a possible implementation, the at least one TRP includes a first TRP for sending a downlink signal, the first TRP corresponds to a first type of PH, and the first type of PH includes a PH of a sounding reference signal SRS.

[0039] In combination with the second aspect, in a possible implementation, the PH information also includes a second type of PH, the second type of PH corresponds to a second TRP among the multiple TRPs, the second type of PH includes a PH of a physical uplink shared channel PUSCH, and the second TRP is used to receive uplink signals.

[0040] In combination with the second aspect, in a possible implementation, the PUSCH PH includes the PUSCH PH on the first carrier, and the SRS PH includes the SRS PH on the first carrier and the second carrier; wherein the first carrier is used to transmit the PUSCH.

[0041] In combination with the second aspect, in a possible implementation, the at least one TRP includes a second TRP for receiving an uplink signal, the second TRP corresponds to a second type of PH, and the second type of PH includes a PH of a PUSCH.

[0042] With reference to the second aspect, in a possible implementation manner, the PH of the PUSCH includes a PH of a PUSCH on a first carrier, where the first carrier is used to transmit the PUSCH.

[0043] In combination with the second aspect, in a possible implementation, the PH information also includes a first type of PH, the first type of PH corresponds to a first TRP among the multiple TRPs, the first type of PH includes a PH of SRS, and the first TRP is used to send a downlink signal.

[0044] In conjunction with the second aspect, in a possible implementation, the method further includes:

[0045] Sending first indication information, where the first indication information includes at least one of the following:

[0046] a path loss value from the terminal device to the second TRP;

[0047] a difference between a path loss value from the terminal device to the second TRP and a reference path loss value;

[0048] a difference between the compensated path loss value from the terminal device to the second TRP and a reference compensated path loss value;

[0049] a difference between an expected received power of the terminal device to the second TRP and a reference expected received power;

[0050] The difference between the closed-loop power control adjustment amount of the terminal device to the second TRP and the reference closed-loop power control adjustment amount.

[0051] In combination with the second aspect, in a possible implementation, the PH of the PUSCH is determined by the difference between the path loss value from the terminal device to the second TRP and the reference path loss value and the path loss value corresponding to the downlink reference signal.

[0052] With reference to the second aspect, in a possible implementation, the SRS is used to estimate a downlink channel.

[0053] In a third aspect, an embodiment of the present application provides a communication device for executing the method in the first aspect or any possible implementation of the first aspect. The communication device includes a unit having a function of executing the method in the first aspect or any possible implementation of the first aspect.

[0054] In a fourth aspect, an embodiment of the present application provides a communication device for executing the method in the second aspect or any possible implementation of the second aspect. The communication device includes a unit having the function of executing the method in the second aspect or any possible implementation of the second aspect.

[0055] In the third aspect or the fourth aspect, the above-mentioned communication device and communication device may include a transceiver unit and a processing unit.

[0056] In a fifth aspect, an embodiment of the present application provides a communication device, comprising a processor configured to execute the method described in any one of the first and second aspects or any possible implementation thereof. Alternatively, the processor is configured to execute a program stored in a memory, and when the program is executed, the method described in any one of the first and second aspects or any possible implementation thereof is executed.

[0057] In a possible implementation, the memory is located outside the communication device.

[0058] In a possible implementation, the memory is located within the above-mentioned communication device.

[0059] In an embodiment of the present application, the processor and the memory may also be integrated into one device, that is, the processor and the memory may also be integrated together.

[0060] In a possible implementation, the communication device further includes a transceiver, where the transceiver is configured to receive a signal or send a signal.

[0061] In a sixth aspect, an embodiment of the present application provides a communication device, which includes a logic circuit and an interface, wherein the logic circuit and the interface are coupled; the logic circuit is used to determine that the change in path loss between the terminal device and at least one TRP among the multiple TRPs is greater than or equal to a first threshold; and the interface is used to output PH information.

[0062] It can be understood that with respect to the communication device shown in the sixth aspect, reference can also be made to the first aspect or the specific implementation shown below.

[0063] In a seventh aspect, an embodiment of the present application provides a communication device, which includes a logic circuit and an interface, wherein the logic circuit and the interface are coupled; the interface is used to output second indication information and input PH information.

[0064] It can be understood that with respect to the communication device shown in the seventh aspect, reference can also be made to the second aspect or the specific implementation shown below.

[0065] In an eighth aspect, an embodiment of the present application provides a computer-readable storage medium for storing a computer program, which, when executed on a computer, enables the method shown in any one of the first to second aspects or any possible implementation to be executed.

[0066] In a ninth aspect, an embodiment of the present application provides a computer program product, which includes a computer program. When the computer program is run on a computer, the method shown in any aspect of the first to second aspects or any possible implementation is executed.

[0067] In a tenth aspect, an embodiment of the present application provides a computer program. When the computer program is run on a computer, the method shown in any aspect of the first to second aspects or any possible implementation is executed.

[0068] In the eleventh aspect, an embodiment of the present application provides a communication system, which includes a terminal device and a network device, the terminal device is used to execute the method shown in the above-mentioned first aspect or any possible implementation of the first aspect, and the network device is used to execute the method shown in the above-mentioned second aspect or any possible implementation of the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] FIG1A is a schematic diagram of the structure of a communication system provided in an embodiment of the present application;

[0070] FIG1B is a schematic diagram of the structure of another communication system provided in an embodiment of the present application;

[0071] FIG2 is a flow chart of a communication method provided in an embodiment of the present application;

[0072] FIG3 is a flow chart of another communication method provided in an embodiment of the present application;

[0073] FIG4 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0074] FIG5 is a schematic diagram of the structure of another communication device provided in an embodiment of the present application;

[0075] FIG6 is an example of a processor provided in an embodiment of the present application;

[0076] FIG7 is a schematic structural diagram of another communication device provided in an embodiment of the present application;

[0077] FIG8 is an example of a baseband implementation provided in an embodiment of the present application. DETAILED DESCRIPTION

[0078] The terms "first" and "second" in the specification, claims and drawings of this application are only used to distinguish different objects, and are not used to limit the order, timing, priority or importance of multiple objects. In the embodiments of the present application, "multiple" refers to two or more. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices. In addition, the character " / ", unless otherwise specified, generally indicates that the objects associated before and after are in an "or" relationship.

[0079] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it refer to independent or alternative embodiments that are mutually exclusive of other embodiments. It will be understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0080] It should be understood that in the present application, "at least one (item)" refers to one or more, "more than one" refers to two or more, "at least two (items)" refers to two or three and more than three, and "and / or" is used to describe the association relationship of associated objects, indicating that three relationships may 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 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.

[0081] The method provided in this application can be applied to various communication systems, for example, the Internet of Things (IoT) system, the narrowband Internet of Things (NB-IoT) system, the long term evolution (LTE) system, the fifth generation (5G) communication system, and new communication systems (such as 6G) that will emerge in future communication developments.

[0082] The technical solution provided in this application can also be applied to machine type communication (MTC), long term evolution-machine (LTE-M), device-to-device (D2D) network, machine-to-machine (M2M) network, Internet of Things (IoT) network or other networks. Among them, the IoT network can include, for example, the Internet of Vehicles. Among them, the communication mode in the Internet of Vehicles system is collectively referred to as vehicle-to-everything (V2X, X can represent anything). For example, the V2X can include: vehicle-to-vehicle (V2V) communication, vehicle-to-infrastructure (V2I) communication, vehicle-to-pedestrian (V2P) communication or vehicle-to-network (V2N) communication, etc. For example, in Figure 1A or Figure 1B shown below, terminal devices can communicate with each other through D2D technology, M2M technology or V2X technology, etc.

[0083] The network device in the embodiments of the present application may be a next generation node B (gNB), a next generation evolved node B (ng-eNB), or a network device in future 6G communications. The network device may be any device with wireless transceiver functions, such as a base station. Base stations may have various forms, such as macro base stations, micro base stations, relay stations, and access points. The base station may also be a base station in a future communication system such as a sixth generation communication system. Optionally, the network device may be an access node, a wireless relay node, a wireless backhaul node, etc. in a wireless local area network (wireless fidelity, WiFi) system. Optionally, the network device may be a wireless controller in a cloud radio access network (CRAN) scenario. Optionally, the network device may be a wearable device or an in-vehicle device, etc. Optionally, the network device may also be a small cell, a transmission reception point (TRP) (or also referred to as a transmission point), a transmission measurement function (TMF), etc. It is understandable that the network device may also be a base station in a future evolved public land mobile network (PLMN), etc.

[0084] In some deployments, a base station (such as a gNB) can be composed of a centralized unit (CU) and a distributed unit (DU). That is, the functions of the base station in the access network are split, with some functions of the base station deployed in a CU and the remaining functions deployed in the DU. Multiple DUs share a single CU, which can save costs and facilitate network expansion. In other deployments of base stations, the CU can also be divided into a CU-control plane (CP) and a CU-user plane (UP). In still other deployments of base stations, the base station can also be an open radio access network (ORAN) architecture, etc. This application does not limit the specific type of base station.

[0085] The terminal device in the embodiments of the present application may also be referred to as user equipment (UE), terminal, etc. A terminal device is a device with wireless transceiver capabilities that can be deployed on land, including indoors or outdoors, handheld, wearable, or vehicle-mounted; can also be deployed on water, such as on a ship; can also be deployed in the air, such as on an airplane, balloon, or satellite. The terminal device can be a mobile phone, a tablet computer, a computer with wireless transceiver capabilities, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical care, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, customer-premises equipment (CPE), etc. It is understandable that the terminal device can also be a terminal device in a future 6G network or a terminal device in a future evolved PLMN, etc.

[0086] It can be understood that the terminal device shown in this application can not only include vehicles in the Internet of Vehicles (such as complete vehicles), but also include vehicle-mounted devices or vehicle-mounted terminals in the Internet of Vehicles. This application does not limit the specific form of the terminal device when applied to the Internet of Vehicles.

[0087] Please refer to Figure 1A, which is a schematic diagram of the structure of a communication system provided in an embodiment of the present application. The communication system includes at least one terminal device and at least one network device. Figure 1A uses two terminal devices (UE1 and UE2) and two network devices (gNB and TRP) as an example. In this communication system, the gNB can send downlink data to UE1 and UE2, UE1 and UE2 can send uplink data to the gNB, and UE1 and UE2 can also send uplink data to the TRP.

[0088] The communication system can be an asymmetric deployment of a single downlink (DL) transmission reception point (TRP) and multiple uplink (UL) TRPs. As shown in Figure 1B, the communication system includes at least one terminal device and multiple TRPs. Figure 1B takes a terminal device as an example, and there is a communication connection between the terminal device and the multiple TRPs. The multiple TRPs include a DL-TRP and at least one UL-TRP (such as UL-TRP1 and UL-TRP2 shown in Figure 1A or Figure 1B). The DL-TRP is used to send downlink signals and receive uplink signals, and the at least one UL-TRP is used to receive uplink signals. In order to save costs, the at least one UL-TRP does not send downlink signals, or the at least one UL-TRP does not have the ability to send downlink signals to the terminal device. The DL-TRP can send downlink data to the terminal device, and the uplink data sent by the terminal device (such as the physical uplink shared channel (PUSCH)) can be received by one or more of the multiple TRPs. For example, when a terminal device is located at the cell edge of a DL-TRP (i.e., gNB), the distance between the terminal device and the DL-TRP is relatively far, while the distance between the terminal device and UL-TRP1 is relatively close. Therefore, the PUSCH sent by the terminal device can be received by UL-TRP1. For another example, the PUSCH sent by the terminal device is jointly received by multiple TRPs, i.e., the DL-TRP, UL-TRP1, and UL-TRP2 can all receive the PUSCH.

[0089] It can be understood that the above-mentioned multiple TRPs can be contained in one network device, or the multiple TRPs can be contained in different network devices respectively, and this application does not limit this.

[0090] In the above-mentioned communication system, the terminal device can report the power headroom (PH) to the network device (such as at least one TRP among the multiple TRPs, especially the DL-TRP). The process of the terminal device reporting the PH is also called the power headroom report (PHR). The PH is the difference between the nominal maximum transmission power of the terminal device and the estimated physical uplink shared channel (PUSCH) or the channel sounding reference signal (SRS) transmission power. The network device can perform closed-loop power control based on the power headroom reported by the terminal device, the measured path loss and other information, thereby scheduling resources for the terminal device and reducing interference between terminal devices.

[0091] Exemplarily, the PH reported by the terminal device may include type 1 PH, type 2 PH or type 3 PH. Among them, type 1 PH is the difference between the nominal PUSCH maximum transmission power of the terminal device and the estimated PUSCH transmission power. Type 2 PH is the difference between the nominal maximum transmission power of the terminal device and the estimated power of PUSCH and PUCCH transmissions on a special cell (SpCell) of another media access control (MAC) entity (in the case of LTE and 5G dual connection, it is the evolved universal terrestrial radio access (E-UTRA) MAC entity). Type 3 PH is the difference between the nominal SRS maximum transmission power of the terminal device and the estimated SRS transmission power.

[0092] Generally, after a terminal device moves, if the path loss between the terminal device and different TRPs changes, the terminal device needs to report the PH. In a communication system with symmetrical deployment of DL-TRP and UL-TRP, the uplink channel and the downlink channel are reciprocal. The terminal device can determine the PUSCH PH based on the path loss of the downlink reference signal and report the PUSCH PH.

[0093] However, in a communication system with asymmetric deployment of DL single TRP and UL multiple TRPs, the uplink channel and the downlink channel are not reciprocal, so how the terminal device can reasonably report the PH becomes an urgent problem to be solved. In addition, when the PUSCH is received by the UL-TRP or mainly by the UL-TRP, the PH of the PUSCH determined by the terminal device based on the path loss of the downlink reference signal is inaccurate and cannot reflect the actual PH of the PUSCH, resulting in inaccurate power control of the PUSCH by the network device. For example, when the terminal device is served by the UL-TRP with smaller path loss, using the larger path loss from the terminal device to the DL-TRP for power control will result in high PUSCH transmission power, causing greater interference.

[0094] In view of this, an embodiment of the present application provides a communication method that enables a terminal device to report PH more reasonably. The method provided in an embodiment of the present application can be applied to a communication system as shown in Figure 1A or Figure 1B, or the method is applied to a terminal device and a network device, and there is a communication connection between the terminal device and multiple TRPs, and the multiple TRPs can be included in the network device, or the first TRP of the multiple TRPs is included in the network device, and the first TRP is used to send a downlink signal. The terminal device may include a terminal device or a chip (system) or circuit for a terminal device, and this application does not limit this.

[0095] Please refer to Figure 2, which is a flow chart of a communication method provided in an embodiment of the present application. As shown in Figure 2, the method includes but is not limited to the following steps.

[0096] 201. The terminal device determines that a path loss change between the terminal device and at least one TRP among a plurality of TRPs is greater than or equal to a first threshold.

[0097] Exemplarily, the path loss change may be the difference between a first path loss value and a second path loss value. The first path loss value is the path loss value between the terminal device and any one of the at least one TRPs at a first moment, and the second path loss value is the path loss value between the terminal device and the any one of the TRPs at a second moment. The path loss change between the terminal device and any one of the at least one TRPs is greater than or equal to a first threshold.

[0098] The first moment is the current moment or the moment when the terminal device receives a downlink reference signal or the moment when the terminal device receives a first offset (or called an uplink power control offset). The second moment is the moment when the terminal device last reports PH.

[0099] Exemplarily, the downlink reference signal may include a synchronization signal and a physical broadcast channel (PBCH) block (SSB) or a channel state information reference signal (CSI-RS).

[0100] Exemplarily, the last PH report was triggered because the change in the path loss was greater than or equal to a first threshold, and / or was triggered by a first timing timeout or timeout. The first offset is the difference between the path loss from the terminal device to the second TRP and the path loss from the terminal device to the first TRP. The first TRP is used to send downlink signals (such as the DL-TRP described above), and the second TRP is used to receive uplink signals (such as the UL-TRP described above). Alternatively, the first offset is the difference between the path loss value from the terminal device to the second TRP and a reference path loss value. The reference path loss value is indicated by a network device. For example, the reference path loss value can be the path loss value between the terminal device and the first TRP.

[0101] For example, when a terminal device receives a downlink reference signal, it determines the path loss of the downlink reference signal, thereby determining the path loss between the terminal device and a first TRP, thereby determining the path loss change between the terminal device and the first TRP. For another example, when a terminal device receives a first offset, it determines the path loss between the terminal device and a second TRP based on the first offset and the path loss of the downlink reference signal, thereby determining the path loss change between the terminal device and the second TRP.

[0102] Exemplarily, the first threshold may be configured by a network device or predefined by a protocol. For example, the first threshold is indicated by a radio resource control (RRC) signaling or a downlink control information (DCI) message from a network device. For example, the value of the first threshold is indicated by the RRC high-layer signaling "phr-Tx-PowerFactorChange". The value of the first threshold is at least one of 1 decibel (dB), 3dB, or 6dB. It is understood that the value of the first threshold is only an example, and this application does not limit the value of the first threshold.

[0103] In one possible implementation, the terminal device further determines whether a first timer has expired. Exemplarily, the first timer may be indicated by RRC signaling. For example, the first timer is associated with RRC high-level signaling "phr-ProhibitTimer".

[0104] Exemplarily, the RRC signaling may indicate the timing duration or number of subframes corresponding to the first timing. In the case where the RRC signaling indicates the number of subframes corresponding to the first timing, after the terminal device starts the first timing, when the number of subframes at the current moment exceeds the number of subframes indicated by the RRC signaling, the terminal device determines that the first timing has timed out. Exemplarily, the number of subframes indicated by the RRC signaling is at least one of 0, 10, 20, 50, 100, 200, 500, and 1000. It will be understood that the value of the number of subframes is only an example, and the embodiments of the present application do not limit the value of the number of subframes.

[0105] 202. The terminal device sends power headroom PH information, and the network device receives the PH information accordingly. The PH information includes a PH, and the type of the PH corresponds to at least one TRP.

[0106] Exemplarily, the network device may include a first TRP, or the network device is the first TRP. Optionally, the network device may include multiple TRPs that are in communication connection with the terminal device.

[0107] Exemplarily, when the terminal device determines that the change in path loss between the terminal device and at least one TRP is greater than or equal to a first threshold, the terminal device sends PH information. Optionally, when the terminal device determines that the change in path loss between the terminal device and at least one TRP is greater than or equal to the first threshold, and the first timing times out, the terminal device sends PH information. The PH information includes PH, and the terminal device can determine the type of the PH based on the at least one TRP, that is, the type of the PH corresponds to the at least one TRP. For example, the terminal device can determine the type of the PH based on the communication mode (or transceiver capability) of the at least one TRP, thereby reporting the PH corresponding to the at least one TRP. In the case where the at least one TRP includes a first TRP for sending a downlink signal (such as the DL-TRP described above), the PH information includes a first type (such as type 3 described above) of PH, and the first type of PH includes the PH of SRS. In the case where the at least one TRP includes a second TRP for receiving an uplink signal (such as the UL-TRP described above), the PH information includes a second type (such as type 1 described above) of PH, and the second type of PH includes the PH of PUSCH.

[0108] Exemplarily, the PH information is carried in an uplink channel of the physical layer, such as PUSCH or a physical uplink control channel (PUCCH). Optionally, the PH information can be carried in a PHR MAC control element (CE).

[0109] In an embodiment of the present application, when the change in path loss between the terminal device and at least one TRP is greater than or equal to a first threshold, the terminal device triggers PH reporting, and the type of reported PH is determined by the at least one TRP, so that the PH corresponding to the at least one TRP can be reported, allowing the terminal device to report the PH more reasonably.

[0110] For example, regarding the at least one TRP and PH information, the present application also provides the following implementation methods:

[0111] Implementation method 1: At least one TRP includes a first TRP for transmitting downlink signals. The first TRP corresponds to a first type of PH, that is, the PH information includes a first type of PH. The first type of PH includes an SRS PH. That is, when the change in path loss between the terminal device and the first TRP is greater than or equal to a first threshold, the terminal device reports the SRS PH.

[0112] Exemplarily, the SRS is used to estimate a downlink channel, and the SRS may be received by the first TRP. For example, the usage of the SRS resource set corresponding to the SRS is antenna switching.

[0113] The terminal device may use a single-entry PHR MAC CE or an enhanced single-entry PHR MAC CE to report the PH of the SRS, that is, the single-entry PHR MAC CE or the enhanced single-entry PHR MAC CE includes the first type of PH. For example, the single-entry PHR MAC CE or the enhanced single-entry PHR MAC CE carries the value of the PH of one SRS.

[0114] It can be understood that in the embodiment of the present application, the PHR MAC CE used by the terminal device to report the PH can be a PHR MAC CE predefined in the protocol or a newly defined PHR MAC CE, and the present application does not impose any limitation.

[0115] Exemplarily, the terminal device may determine the PH of the SRS based on the path loss between the terminal device and the first TRP. The path loss between the terminal device and the first TRP may be determined by the path loss of a downlink reference signal. For example, the path loss between the terminal device and the first TRP may be obtained by subtracting the transmit power of the downlink reference signal from the filtered reference signal received power (RSRP).

[0116] For example, if the terminal device does not actually transmit SRS and / or PUSCH within a period of time before the current moment (or the first moment), the PH of SRS at the transmission occasion i of the bandwidth part (BWP) b of the carrier f satisfies the following formula: PH type3,b,f,c (i,q s )=P CMAX,f,c (i)-(P O_SRS,b,f,c (q s )+α SRS,b,f,c (q s )*PL b,f,c (q d )+h b,f,c (i)) (1)

[0117] Among them, PH type3,b,f,c (i,q s ) represents the PH of SRS, P CMAX,f,c (i) represents the maximum transmit power configured by the terminal device, P O_SRS,b,f,c (q s) represents the expected received power (or target received power) of the SRS configured by the network device for the terminal device, α SRS,b,f,c (q s ) represents the path loss factor, PL b,f,c (q d ) represents the downlink reference signal q measured by the terminal device d Path loss, PL b,f,c (q d ) is in dB, h b,f,c (i) represents the closed-loop power control adjustment amount.

[0118] For another example, if the terminal device actually transmits SRS within a period of time before the current moment (or the first moment), for the SRS (q s ), the PH of the SRS satisfies the following formula: PH type3,b,f,c (i,q s )=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)) (2)

[0119] Where i represents the transmission timing of SRS, q s Indicates SRS. PH type3,b,f,c (i,q s ) represents the PH of SRS, P CMAX,f,c (i) represents the maximum transmit power configured by the terminal device, P O_SRS,b,f,c (q s ) represents the expected received power (or target received power) of the SRS configured by the network device for the terminal device, μ represents the subcarrier spacing, M SRS,b,f,c (i)_ represents the actual transmitted SRS bandwidth, α SRS,b,f,c (q s ) represents the path loss factor, PL b,f,c (q d ) represents the downlink reference signal q measured by the terminal device d Path loss, PL b,f,c (q d ) is in dB, h b,f,c (i) represents the closed-loop power control adjustment amount.

[0120] In one possible implementation, the terminal device may transmit data on multiple carriers. The SRS is transmitted on the multiple carriers, and the PH of the above-mentioned SRS may include the PH of the SRS on each carrier in the multiple carriers, that is, the terminal device reports the PH of the SRS transmitted on each carrier in the multiple carriers. For example, the terminal device may use a multi-entry PHR MAC CE or an enhanced multi-entry PHR MAC CE to report the PH, and the multi-entry PHR MAC CE or the enhanced multi-entry PHR MAC CE carries multiple PH values, and the multiple PH values ​​correspond to different carriers. In this implementation, the terminal device reports the PH of the SRS transmitted on each carrier in units of carriers, so that the network device can perform power control of the SRS with carrier as the granularity, making the power control of the SRS more accurate.

[0121] As an example, when there is no actual transmission of SRS and / or PUSCH on the multiple carriers within a period of time before the current moment (or the first moment), the PH of the SRS on the multiple carriers satisfies the above formula (1).

[0122] As another example, in the case where there is actual transmission of SRS on at least one of the multiple carriers within a period of time before the current moment (or the first moment), the PH of the SRS on the at least one carrier is determined by the bandwidth of the SRS transmitted on the at least one carrier. For example, the PH of the SRS on the at least one carrier satisfies formula (2). The PH of the SRS on the carrier on which no SRS is actually transmitted among the multiple carriers satisfies the above formula (1). For example, if there is actual transmission of SRS on the first carrier among the multiple carriers within a period of time before the current moment (or the first moment), the terminal device determines the PH of the SRS on the first carrier based on the bandwidth of the SRS actually transmitted on the first carrier, such as the PH of the SRS on the first carrier satisfies the above formula (2).

[0123] In this implementation, SRS is used to estimate the downlink channel. The SRS is received by the first TRP. Therefore, when the change in path loss between the terminal device and the first TRP is greater than or equal to the first threshold, the terminal device reports the PH of the SRS to make the power control of the SRS more accurate.

[0124] Implementation Method 2: At least one TRP includes a first TRP for transmitting downlink signals, and the PH information includes a first type PH and a second type PH. The first type PH includes the SRS PH, and the second type PH includes the PUSCH PH. That is, if the change in path loss between the terminal device and the first TRP is greater than or equal to a first threshold, the terminal device reports the SRS PH and the PUSCH PH.

[0125] It is understandable that the specific description of the PH of the SRS can be referred to the relevant description in the first implementation method, which will not be described in detail here.

[0126] Exemplarily, the second type of PH corresponds to a second TRP among the multiple TRPs. The PUSCH transmitted by the terminal device is received by the second TRP, and the PH of the PUSCH is determined by the path loss between the terminal device and the second TRP. The path loss between the terminal device and the second TRP can be determined by the first offset and the path loss of the downlink reference signal. That is, the PH of the PUSCH can be determined by the first offset and the path loss of the downlink reference signal.

[0127] For example, when the terminal device does not actually transmit SRS and / or PUSCH within a period of time before the current moment (or the first moment), at the transmission timing i of BWP b of carrier f of the serving cell c of the terminal device, the PH of PUSCH satisfies the following formula:

[0128] PH type1,b,f,c (i,j,q d ,l)=P CMAX,f,c (i)-(P O_PUSCH,b,f,c (j)+α b,f,c (j)*(PL b,f,c (q d )+offset)+Δ TF,b,f,c (i)+f b,f,c (i,l)) (3)

[0129] Alternatively, the PH of the PUSCH satisfies the following formula:

[0130] PH type1,b,f,c (i,j,q d ,l)=P CMAX,f,c (i)-(P O_PUSCH,b,f,c (j)+α b,f,c (j)*PL b,f,c (q d )+offset+Δ TF,b,f,c (i)+f b,f,c (i,l)) (4)

[0131] Among them, PH type1,b,f,c (i,j,q d ,l) represents the PH of PUSCH, P CMAX,f,c (i) represents the maximum transmit power configured by the terminal device, (P O_PUSCH,b,f,c (j) represents the expected received power (or target received power) configured by the network device for the terminal device, α b,f,c (j) represents the path loss factor, PL b,f,c (q d) represents the downlink reference signal q measured by the terminal device d Path loss, PL b,f,c (q d ) is in dB, Δ TF,b,f,c (i) represents an offset related to the modulation and coding scheme (MCS), f b,f,c (i, l) represents the closed-loop power control adjustment value, offset represents the first offset, j represents the parameter set configuration index, and l represents the PUSCH closed-loop power control adjustment index.

[0132] For another example, when the terminal device actually transmits a PUSCH within a period of time before the current moment (or the first moment), at the transmission timing i of the BWP b of the carrier f of the serving cell c of the terminal device, the PH of the PUSCH satisfies the following formula:

[0133] Alternatively, the PH of the PUSCH satisfies the following formula:

[0134] Among them, PH type1,b,f,c (i,j,q d ,l) represents the PH of PUSCH, P CMAX,f,c (i) represents the maximum transmit power configured by the terminal device, P O_PUSCH,b,f,c (j) represents the expected received power (or target received power) configured by the network device for the terminal device, μ represents the subcarrier spacing, represents the bandwidth of PUSCH, α b,f,c (j) represents the path loss factor, PL b,f,c (q d ) represents the downlink reference signal q measured by the terminal device d Path loss, PL b,f,c (q d ) is in dB, Δ TF,b,f,c (i) represents an offset related to the modulation and coding scheme (MCS), f b,f,c (i, l) represents the closed-loop power control adjustment value, offset represents the first offset, j represents the parameter set configuration index, and l represents the PUSCH closed-loop power control adjustment index.

[0135] Exemplarily, the terminal device may use a single-entry PHR MAC CE or an enhanced single-entry PHR MAC CE to report a PH, where the single-entry PHR MAC CE or the enhanced single-entry PHR MAC CE carries at least two types of PHs, including a first type of PH and a second type of PH. For example, the single-entry PHR MAC CE or the enhanced single-entry PHR MAC CE includes at least two PH values, where the at least two PH values ​​include a PH for an SRS and a PH for a PUSCH.

[0136] Exemplarily, when a communication connection exists between a terminal device and multiple second TRPs, the terminal device determines PHs of multiple PUSCHs based on the path losses between the terminal device and the multiple second TRPs, and reports the PHs of the multiple PUSCHs. Each PH of the multiple PUSCHs corresponds to a second TRP.

[0137] In one possible implementation, the terminal device may transmit data on multiple carriers. The PUSCH PH includes the PUSCH PH on a first carrier, and the SRS PH includes the SRS PH on the first carrier and a second carrier; wherein the first carrier is used to transmit the PUSCH.

[0138] Exemplarily, the second carrier is not used to transmit PUSCH. For example, PUSCH is transmitted on the first carrier, and SRS is transmitted on the second carrier. In other words, the first carrier is a carrier configured with PUSCH transmission among the multiple carriers, and the second carrier is a carrier not configured with PUSCH transmission among the multiple carriers. The terminal device reports the PH of PUSCH and SRS on the first carrier and reports the PH of SRS on the carrier that is not configured with PUSCH transmission. The terminal device reports PH in units of carriers, so that the network equipment can perform power control of SRS and PUSCH with carrier as the granularity, making the power control of SRS and PUSCH more accurate. In addition, the terminal device does not need to report the PH of PUSCH on the carrier that is not configured with PUSCH transmission, which can save the overhead of PH reporting.

[0139] Exemplarily, the terminal device may use a multi-entry PHR MAC CE or an enhanced multi-entry PHR MAC CE to report PH, where the multi-entry PHR MAC CE or the enhanced multi-entry PHR MAC CE carries multiple PH values, where the multiple PH values ​​correspond to different carriers. Optionally, the multi-entry PHR MAC CE or the enhanced multi-entry PHR MAC CE carries at least two types (i.e., a first type and a second type) of PH values.

[0140] Exemplarily, there is actual transmission of SRS and / or PUSCH on at least one of the multiple carriers within a period of time before the current moment. The terminal device can determine the PH of the SRS on the at least one carrier based on the actually transmitted SRS, or determine the PH of the PUSCH on the at least one carrier based on the actually transmitted PUSCH. For example, there is actual transmission of SRS on the first carrier within a period of time before the current moment, and the PH of the SRS on the first carrier satisfies the above formula (2). For another example, there is no actual transmission of SRS on the first carrier within a period of time before the current moment, and the PH of the SRS on the first carrier satisfies the above formula (1). For another example, there is actual transmission of PUSCH on the first carrier within a period of time before the current moment, and the PH of the PUSCH on the first carrier satisfies the above formula (4). For example, there is no actual transmission of PUSCH on the first carrier within a period of time before the current moment, and the PH of the PUSCH on the first carrier satisfies the above formula (3).

[0141] In this implementation, when the change in path loss between the terminal device and the first TRP is greater than or equal to a first threshold, the terminal device reports the PH of the SRS and the PH of the PUSCH to make the power control of the SRS and PUSCH more accurate.

[0142] Implementation method three: At least one TRP includes a second TRP for receiving uplink signals, and the second TRP corresponds to a second type of PH, that is, the PH information includes the second type of PH. The second type of PH includes a PUSCH PH. When the change in path loss between the terminal device and the second TRP is greater than or equal to a first threshold, the terminal device reports the PUSCH PH.

[0143] It is understandable that for the specific description of the PH of the PUSCH, reference may be made to the relevant description in the second implementation manner, which will not be described in detail here.

[0144] In one possible implementation, a terminal device may transmit data on multiple carriers. The PUSCH PH includes the PUSCH PH on a first carrier, where the first carrier is the carrier used to transmit the PUSCH among the multiple carriers. In this implementation, the terminal device reports the PUSCH PH on a carrier basis, enabling the network device to perform PUSCH power control at the carrier granularity, making the PUSCH power control more accurate.

[0145] Exemplarily, the PH information may include a plurality of PH values, each of the plurality of PH values ​​corresponding to a first carrier.

[0146] Exemplarily, the terminal device may report the PH using a multi-entry PHR MAC CE or an enhanced multi-entry PHR MAC CE, where the multi-entry PHR MAC CE or the enhanced multi-entry PHR MAC CE carries the second type of PH, and the multi-entry PHR MAC CE carries the PH of the PUSCH on each of the multiple carriers.

[0147] Exemplarily, when there is no actual PUSCH transmission on the first carrier within a period of time before the current moment, the PH of the PUSCH on the first carrier satisfies formula (3). When there is actual PUSCH transmission on the first carrier within a period of time before the current moment, the PH of the PUSCH on the first carrier satisfies formula (4).

[0148] In this implementation, the PUSCH is received by the second TRP. Therefore, when the change in path loss between the terminal device and the second TRP is greater than or equal to the first threshold, the terminal device reports the PH of the PUSCH to make the power control of the PUSCH more accurate.

[0149] Implementation Method 4: At least one TRP includes a second TRP for receiving uplink signals, and the PH information includes a second type of PH and a first type of PH. The first type of PH includes the SRS PH, and the second type of PH includes the PUSCH PH. That is, if the change in path loss between the terminal device and the second TRP is greater than or equal to a first threshold, the terminal device reports the SRS PH and the PUSCH PH.

[0150] It is understandable that the specific description of the PH of the SRS can refer to the relevant description in the first implementation mode, and the specific description of the PH of the PUSCH can refer to the relevant description in the second implementation mode, which will not be described in detail here.

[0151] In one possible implementation, the terminal device may transmit data on multiple carriers. The PUSCH PH includes a PUSCH PH on a first carrier, where the first carrier is a carrier used to transmit the PUSCH among the multiple carriers. The SRS PH includes an SRS PH on the first carrier.

[0152] Exemplarily, the terminal device may use a multi-entry PHR MAC CE to report a PH or an enhanced multi-entry PHR MAC CE, where the multi-entry PHR MAC CE or the enhanced multi-entry PHR MAC CE carries a first type of PH and a second type of PH. For example, the multi-entry PHR MAC CE or the enhanced multi-entry PHR MAC CE carries multiple first type PH values ​​and multiple second type PH values. One first type PH value among the multiple first type PH values ​​corresponds to a first carrier, and one second type PH value among the multiple second type PH values ​​corresponds to a first carrier.

[0153] Optionally, the PH of the SRS also includes a PH of the SRS on a second carrier, where the second carrier is a carrier among the multiple carriers that is not configured for PUSCH transmission. That is, the second carrier is not used to transmit PUSCH. The first carrier and the second carrier are included in the multiple carriers on which the terminal device transmits data. For example, the multi-entry PHR MAC CE carries multiple first-type PH values, and one first-type PH value among the multiple first-type PH values ​​corresponds to one carrier among the multiple carriers.

[0154] Exemplarily, when there is actual transmission of SRS and / or PUSCH on at least one of the multiple carriers within a period of time before the current moment, the terminal device can determine the PH of the SRS on the at least one carrier based on the actually transmitted SRS, or determine the PH of the PUSCH on the at least one carrier based on the actually transmitted PUSCH.

[0155] In this implementation, PUSCH is received by the second TRP. Therefore, when the change in path loss between the terminal device and the second TRP is greater than or equal to the first threshold, the terminal device reports the PH of PUSCH and the PH of SRS to make the power control of the PUSCH and SRS more accurate.

[0156] Please refer to Figure 3, which is a flow chart of another communication method provided by an embodiment of the present application. As shown in Figure 3, the method includes but is not limited to the following steps.

[0157] 301. The network device sends second indication information, and the terminal device receives the second indication information accordingly. The second indication information is used to indicate that there is a communication connection between the terminal device and multiple TRPs.

[0158] Exemplarily, the second indication information may indicate that the resident cell of the terminal device supports the terminal device to access multiple TRPs, or the second indication information is used to indicate that the cell accessed by the terminal device supports an asymmetric deployment scenario of a single DL TRP and multiple UL TRPs. The terminal device can establish a communication connection with the multiple TRPs based on the second indication information.

[0159] Exemplarily, the second indication information may be carried in one or more combinations of RRC high-layer signaling, DCI, and MAC CE.

[0160] In some possible implementations, the second indication information may include at least one of the following: path loss values ​​from the terminal device to multiple TRPs, the difference between the path loss values ​​from the terminal device to multiple TRPs and the reference path loss values, the difference between the compensated path loss values ​​from the terminal device to multiple TRPs and the reference compensated path loss values, the difference between the expected received power from the terminal device to multiple TRPs and the reference expected received power, and the difference between the closed-loop power control adjustment amount from the terminal device to multiple TRPs and the reference closed-loop power control adjustment amount. Exemplarily, the multiple TRPs include a second TRP for receiving uplink signals or channels. The second TRP is used to receive uplink signals and does not send downlink signals, or the second TRP only has the ability to receive uplink signals or channels sent by the terminal device, but does not have the ability to send downlink signals or channels to the terminal device.

[0161] 302. The terminal device determines that a change in path loss between the terminal device and at least one TRP among a plurality of TRPs is greater than or equal to a first threshold.

[0162] It is understandable that the specific implementation of step 302 can refer to the specific implementation of step 201, which will not be repeated here.

[0163] Optionally, the method shown in FIG3 further includes step 303 .

[0164] 303. The network device sends first indication information, and correspondingly, the terminal device receives the first indication information.

[0165] The first indication information includes at least one of the following items: the path loss value from the terminal device to the second TRP, the difference between the path loss value from the terminal device to the second TRP and the reference path loss value, the difference between the compensated path loss value from the terminal device to the second TRP and the reference compensated path loss value, the difference between the expected received power from the terminal device to the second TRP and the reference expected received power, and the difference between the closed-loop power control adjustment amount from the terminal device to the second TRP and the reference closed-loop power control adjustment amount.

[0166] The reference path loss value is a path loss value from the terminal device to the first TRP (ie, the network device or DL-TRP), and the reference path loss value may also be referred to as a DL path loss value.

[0167] The reference compensated path loss value is the compensated path loss value from the terminal device to the first TRP. The reference compensated path loss value may also be referred to as the DL compensated path loss value. The reference compensated path loss value may be determined by a path loss factor and the path loss of a downlink reference signal. For example, the reference compensated path loss value is the product of the path loss factor α and the path loss measured by the terminal device using the downlink reference signal.

[0168] The reference expected reception power is the expected reception power configured by the network device for the terminal apparatus.

[0169] The reference closed-loop power control adjustment amount can be configured by a network device.

[0170] Exemplarily, in the case where there is a communication connection between the terminal device and multiple second TRPs, the first indication information includes at least one of the following items: the path loss value from the terminal device to at least one second TRP among the multiple second TRPs, the difference between the path loss value from the terminal device to at least one second TRP and a reference path loss value, the difference between the compensated path loss value from the terminal device to at least one second TRP and a reference compensated path loss value, the difference between the expected received power from the terminal device to at least one second TRP and a reference expected received power, and the difference between the closed-loop power control adjustment amount from the terminal device to at least one second TRP and a reference closed-loop power control adjustment amount.

[0171] It is understood that in the embodiments of the present application, the difference between A and B can be understood as AB, or BA, or the absolute value of AB. For example, the first offset being the difference between the path loss value from the terminal device to the second TRP and the reference path loss value can be understood as the first offset being equal to the path loss value from the terminal device to the second TRP minus the reference path loss value, or the first offset being equal to the reference path loss value minus the path loss value from the terminal device to the second TRP, or the first offset being equal to the absolute value of the difference between the path loss value from the terminal device to the second TRP and the reference path loss value.

[0172] The terminal device can determine the PH of the PUSCH based on the first indication information.

[0173] As an example, the first indication information includes a path loss value from the terminal device to the second TRP. In the case where the terminal device does not actually transmit SRS and / or PUSCH within a period of time before the current moment (or the first moment), at the transmission timing i of the BWP b of the carrier f of the serving cell c of the terminal device, the PH of the PUSCH satisfies the following formula:

[0174] PH type1,b,f,c (i,j,q d ,l)=P CMAX,f,c (i)-(P O_PUSCH,b,f,c (j)+α b,f,c (j)*PL b,f,c (qu )+Δ TF,b,f,c (i)+f b,f,c (i,l)) (7)

[0175] When the terminal device actually transmits a PUSCH within a period of time before the current moment (or the first moment), at the transmission timing i of the BWP b of the carrier f of the serving cell c of the terminal device, the PH of the PUSCH satisfies the following formula:

[0176] In the above formula (7) or formula (8), PH type1,b,f,c (i,j,q d ,l) represents the PH of PUSCH, P CMAX,f,c (i) represents the maximum transmit power configured by the terminal device, (P O_PUSCH,b,f,c (j) represents the expected received power (or target received power) configured by the network device for the terminal device, represents the bandwidth of PUSCH, α b,f,c (j) represents the path loss factor, PL b,f,c (q u ) represents the path loss value from the terminal device to the second TRP, or the PL b,f,c (q u ) represents the path loss value of the uplink reference signal, PL b,f,c (q u ) is in dB, Δ TF,b,f,c (i) represents an MCS-related bias, f b,f,c (i, l) represents the closed-loop power control adjustment amount. j represents the parameter set configuration index, and l represents the PUSCH closed-loop power control adjustment index.

[0177] As another example, the first indication information includes at least one of a difference between a path loss value from the terminal device to the second TRP and a reference path loss value, a difference between a compensated path loss value from the terminal device to the second TRP and a reference compensated path loss value, a difference between an expected received power from the terminal device to the second TRP and a reference expected received power, and a difference between a closed-loop power control adjustment amount from the terminal device to the second TRP and a reference closed-loop power control adjustment amount. The terminal device may determine the PH of the PUSCH based on the path loss of the downlink reference signal and the first indication information.

[0178] For example, when the terminal device does not actually transmit SRS and / or PUSCH within a period of time before the current moment (or the first moment), the PH of PUSCH satisfies the following formula:

[0179] PH type1,b,f,c (i,j,q d ,l)=P CMAX,f,c(i)-(P O_PUSCH,b,f,c (j)+α b,f,c (j)*PL b,f,c (q d )+Δ TF,b,f,c (i)+f b,f,c (i,l)+X) (9)

[0180] For another example, when the terminal device actually transmits a PUSCH within a period of time before the current moment (or the first moment), the PH of the PUSCH satisfies the following formula:

[0181] In the above formula (9) or formula (10), PH type1,b,f,c (i,j,q d ,l) represents the PH of PUSCH, P CMAX,f,c (i) represents the maximum transmit power configured by the terminal device, P O_PUSCH,b,f,c (j) represents the expected received power (or target received power) configured by the network device for the terminal device, represents the bandwidth of PUSCH, α b,f,c (j) represents the path loss factor, PL b,f,c (q d ) represents the downlink reference signal q measured by the terminal device d Path loss, PL b,f,c (q d ) is in dB, Δ TF,b,f,c (i) represents an offset related to the modulation and coding scheme (MCS), f b,f,c (i, l) represents the closed-loop power control adjustment amount, and X represents the difference between the path loss value from the terminal device to the second TRP and the reference path loss value, the difference between the compensated path loss value from the terminal device to the second TRP and the reference compensated path loss value, the difference between the expected received power from the terminal device to the second TRP and the reference expected received power, or the difference between the closed-loop power control adjustment amount from the terminal device to the second TRP and the reference closed-loop power control adjustment amount.

[0182] Optionally, when the first indication information includes a difference between a path loss value from the terminal device to the second TRP and a reference path loss value, the terminal device may determine the PH of the PUSCH based on the difference between the path loss value from the terminal device to the second TRP and the reference path loss value and the path loss of the downlink reference signal. For example, the PH of the PUSCH satisfies the above formula (3) or formula (5).

[0183] Exemplarily, the first indication information may be carried in one or more combinations of RRC high-layer signaling, DCI, and MAC CE.

[0184] 304. The terminal device sends PH information, and correspondingly, the network device receives the PH information. The PH information includes a PH, and the type of the PH corresponds to at least one TRP.

[0185] It is understandable that for the specific description of the PH information, reference may be made to the relevant descriptions in step 202 in FIG. 2 or in the several implementations of the PH information described above, which will not be described in detail here.

[0186] It is understood that in the embodiment of the present application, when the terminal device does not receive the above-mentioned second indication information, the terminal device can determine whether to trigger PH reporting based on the change in path loss between the terminal device and the first TRP. For example, when the path loss value between the terminal device and the first TRP is greater than or equal to the threshold and the phr-ProhibitTimer times out or has timed out, the terminal device reports the PH of the PUSCH.

[0187] In an embodiment of the present application, when the change in path loss between the terminal device and at least one TRP is greater than or equal to a first threshold, the terminal device triggers PH reporting, and the type of reported PH is determined by the at least one TRP, so that the PH corresponding to the at least one TRP can be reported, allowing the terminal device to report the PH more reasonably.

[0188] The following describes the device provided in the embodiments of the present application.

[0189] The present application divides the functional modules of the communication device according to the above-mentioned method embodiment. 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-mentioned 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 this application is schematic and is only a logical functional division. There may be other division methods in actual implementation. The communication device of the embodiment of the present application will be described in detail below with reference to Figures 4 to 6.

[0190] Figure 4 is a schematic diagram of the structure of a communication device provided in an embodiment of the present application. As shown in Figure 4, the communication device includes a processing unit 401 and a transceiver unit 402. The transceiver unit 402 can implement corresponding communication functions, and the processing unit 401 is used to process data. For example, the transceiver unit 402 can also be referred to as a communication interface or a communication unit.

[0191] In some embodiments of the present application, the communication device can be used to execute the actions performed by the terminal device in the above method embodiments. In this case, the communication device can be a terminal device, or the communication device can be a component that can be configured in the terminal device (such as a chip or system, etc.). The transceiver unit 402 is used to execute the transceiver-related operations of the terminal device in the above method embodiments, and the processing unit 401 is used to execute the processing-related operations of the terminal device in the above method embodiments.

[0192] Exemplarily, the processing unit 401 is used to determine whether a change in path loss between the terminal device and at least one TRP among a plurality of TRPs is greater than or equal to a first threshold; the transceiver unit 402 is used to send PH information.

[0193] Optionally, the transceiver unit 402 is further configured to receive first indication information.

[0194] Optionally, the transceiver unit 402 is further configured to receive second indication information.

[0195] It is understandable that the specific description of at least one TRP, path loss change, first threshold, PH information, first indication information, second indication information, etc. can refer to the method embodiment shown above and will not be described in detail here.

[0196] In other embodiments of the present application, the communication device can be used to execute the actions performed by the network device in the above method embodiments. In this case, the communication device can be a network device, or the communication device can be or can be configured as a component of the network device (such as a chip or system, etc.), the transceiver unit 402 is used to execute the transceiver-related operations of the network device in the above method embodiments, and the processing unit 401 is used to execute the network device processing-related operations in the above method embodiments.

[0197] Exemplarily, the transceiver unit 402 is configured to send the second indication information and receive PH information.

[0198] Optionally, the transceiver unit 402 is further configured to send first indication information.

[0199] It is understandable that the specific description of the first indication information, PH information and second indication information, etc. can be referred to the method embodiment shown above, and will not be described in detail here.

[0200] Optionally, the above-mentioned communication device may further include a storage unit, which may be used to store instructions and / or data. The processing unit 401 may read the instructions and / or data in the storage unit so that the communication device implements the above-mentioned method embodiment.

[0201] It can be understood that the specific description of the transceiver unit and the processing unit shown in the embodiment of the present application is only an example. For the specific functions or execution steps of the transceiver unit and the processing unit, please refer to the above-mentioned method embodiment and will not be described in detail here.

[0202] The above describes the communication device according to the embodiment of the present application. The following describes possible product forms of the communication device. It should be understood that any product having the functions of the communication device described in FIG. 4 falls within the scope of protection of the embodiment of the present application. It should also be understood that the following description is merely illustrative and does not limit the product forms of the communication device according to the embodiment of the present application to these examples.

[0203] In one possible implementation, in the communication device shown in Figure 4, the processing unit 401 can be one or more processors, the transceiver unit 402 can be a transceiver, or the transceiver unit 402 can also be a sending unit and a receiving unit, the sending unit can be a transmitter, the receiving unit can be a receiver, and the sending unit and the receiving unit are integrated into a single device, such as a transceiver. In the embodiment of the present application, the processor and the transceiver can be coupled, etc., and the embodiment of the present application does not limit the connection method between the processor and the transceiver. During the execution of the above method, the process of sending information in the above method can be understood as the process of the processor outputting the above information. When outputting the above information, the processor outputs the above information to the transceiver so that it can be transmitted by the transceiver. After being output by the processor, the above information may also need to undergo other processing before reaching the transceiver. Similarly, the process of receiving information in the above method can be understood as the process of the processor receiving the input information. When the processor receives the input information, the transceiver receives the above information and inputs it into the processor. Furthermore, after the transceiver receives the above information, the above information may need to be processed further before being received by the processor.

[0204] As shown in FIG. 5 , the communication device 50 includes one or more processors 520 and a transceiver 510 .

[0205] In some embodiments of the present application, the communication device can be used to execute the steps or functions performed by the terminal device in the above method embodiments.

[0206] Exemplarily, the processor 520 is configured to determine whether a change in path loss between the terminal device and at least one TRP among a plurality of TRPs is greater than or equal to a first threshold; and the transceiver 510 is configured to send PH information.

[0207] Optionally, the transceiver 510 is further configured to receive first indication information.

[0208] Optionally, the transceiver 510 is further configured to receive second indication information.

[0209] In other embodiments of the present application, the communication device can be used to execute the steps or functions performed by the network device in the above method embodiments.

[0210] Exemplarily, the transceiver 510 is configured to send the second indication information and receive PH information.

[0211] Optionally, the transceiver 510 is further configured to send first indication information.

[0212] It will be understood that the specific descriptions of the transceiver and processor shown in the embodiments of the present application are merely examples. For the specific functions or execution steps of the transceiver and processor, reference may be made to the above-mentioned method embodiments, which will not be described in detail here.

[0213] In the above embodiments, the description of PH information, first indication information, second indication information, first threshold, path loss change, etc. can also refer to the introduction in the above method embodiment, and will not be described in detail here.

[0214] In various implementations of the communication device shown in FIG5 , the transceiver may include a receiver and a transmitter, wherein the receiver is configured to perform a receiving function (or operation) and the transmitter is configured to perform a transmitting function (or operation). The transceiver is configured to communicate with other devices / apparatuses via a transmission medium.

[0215] Optionally, the communication device 50 may further include one or more memories 530 for storing program instructions and / or data, etc. The memory 530 is coupled to the processor 520. The coupling in the embodiment of the present application is an indirect coupling or communication connection between devices, units or modules, which can be electrical, mechanical or other forms, and is used for information exchange between devices, units or modules. The processor 520 may operate in conjunction with the memory 530. The processor 520 may execute program instructions stored in the memory 530. Optionally, at least one of the one or more memories may be included in the processor.

[0216] The specific connection medium between the transceiver 510, processor 520, and memory 530 is not limited in the embodiments of the present application. In Figure 5, the memory 530, processor 520, and transceiver 510 are connected via a bus 540. The bus is represented by a bold line in Figure 5. The connection methods between other components are merely schematic and are not limiting. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, Figure 5 only uses a single bold line, but this does not mean that there is only one bus or only one type of bus.

[0217] In the embodiments of the present application, the processor may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, etc., and may implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor may be a microprocessor or any conventional processor, etc. The steps of the methods disclosed in the embodiments of the present application may be directly implemented as being executed by a hardware processor, or may be executed by a combination of hardware and software modules in the processor, etc.

[0218] In the embodiment of the present application, memory may include but is not limited to non-volatile memories such as hard disk drive (HDD) or solid-state drive (SSD), random access memory (RAM), erasable programmable read-only memory (EPROM), read-only memory (ROM) or portable read-only memory (CD-ROM), etc. Memory is any storage medium that can be used to carry or store program code in the form of instructions or data structures, and can be read and / or written by a computer (such as the communication device shown in the present application), but is not limited thereto. The memory in the embodiment of the present application can also be a circuit or other arbitrarily capable of realizing a storage function, for storing program instructions and / or data.

[0219] Illustratively, the processor 520 is primarily used to process communication protocols and communication data, control the entire communication device, execute software programs, and process software program data. The memory 530 is primarily used to store software programs and data. The transceiver 510 may include a control circuit and an antenna. The control circuit is primarily used to convert baseband signals into radio frequency signals and process radio frequency signals. The antenna is primarily used to transmit and receive radio frequency signals in the form of electromagnetic waves. Input / output devices, such as a touch screen, display, and keyboard, are primarily used to receive user input and output data to the user.

[0220] When the communication device is powered on, the processor 520 can read the software program in the memory 530, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor 520 performs baseband processing on the data to be transmitted and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and then transmits the radio frequency signal to the outside in the form of electromagnetic waves through the antenna. When data is sent to the communication device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 520. The processor 520 converts the baseband signal into data and processes the data.

[0221] In another implementation, the RF circuit and antenna may be provided independently of the processor performing baseband processing. For example, in a distributed scenario, the RF circuit and antenna may be remotely arranged independent of the communication device.

[0222] It is understood that the communication device shown in the embodiment of the present application may also have more components than those in FIG5 , and the embodiment of the present application is not limited to this. The method performed by the processor and transceiver shown above is only an example. For the specific steps performed by the processor and transceiver, please refer to the method described above.

[0223] Exemplarily, the processor 520 may include a communication interface and processing circuitry. The communication interface and processing circuitry may include one or more hardware components that provide a physical structure that performs various processes associated with wireless communication (e.g., signal reception and / or signal transmission). The communication interface and processing circuitry may include two or more transmit / receive chains. The functions implemented by the communication interface and processing circuitry may also be processed on a computer-readable medium.

[0224] As an example, the processor is used to perform operations related to terminal device processing in the above method embodiment. For example, as shown in Figure 6, the processing circuit is configured as a PH calculation circuit. The PH calculation circuit is used to determine the triggering of PH reporting based on various input parameters during uplink transmission, and calculate the PH value to be reported, and use the PH value as output data. The PH calculation circuit can also be processed on a computer-readable medium. The communication interface is used to input various parameters (such as the first threshold value described above, the path loss change, etc.) and output the PH value.

[0225] In another possible implementation, in the communication device shown in FIG4 , the processing unit 401 may be one or more logic circuits, and the transceiver unit 402 may be an input / output interface, or may be called a communication interface, or an interface circuit, or an interface, etc. Alternatively, the transceiver unit 402 may also be a sending unit and a receiving unit, the sending unit may be an output interface, the receiving unit may be an input interface, and the sending unit and the receiving unit are integrated into one unit, such as an input / output interface. As shown in FIG7 , the communication device shown in FIG7 includes a logic circuit 701 and an interface 702. That is, the above-mentioned processing unit 401 can be implemented with a logic circuit 701, and the transceiver unit 402 can be implemented with an interface 702. The logic circuit 701 may be a chip, a processing circuit, an integrated circuit, or a system on chip (SoC) chip, etc., and the interface 702 may be a communication interface, an input / output interface, a pin, etc. For example, FIG7 is illustrated using the above-mentioned communication device as a chip, and the chip includes a logic circuit 701 and an interface 702.

[0226] In the embodiment of the present application, the logic circuit and the interface may also be coupled to each other. The embodiment of the present application does not limit the specific connection method between the logic circuit and the interface.

[0227] In some embodiments of the present application, the communication device may be configured to execute the steps or functions performed by the terminal device in the above method embodiments. Exemplarily, logic circuit 701 is configured to determine whether a change in path loss between the terminal device and at least one of a plurality of TRPs is greater than or equal to a first threshold; interface 702 is configured to output PH information. Optionally, interface 702 is further configured to input first indication information. Optionally, interface 702 is further configured to input second indication information.

[0228] In other embodiments of the present application, the communication device can be used to execute the steps or functions performed by the network device in the above method embodiments. Exemplarily, interface 702 is used to output the second indication information and input the PH information. Optionally, interface 702 is also used to output the first indication information.

[0229] It can be understood that the specific description of the logic circuit and interface shown in the embodiments of the present application is only an example. For the specific functions or execution steps of the logic circuit and interface, please refer to the above-mentioned method embodiment and will not be described in detail here.

[0230] In the above embodiments, the description of PH information, first indication information, second indication information, first threshold, path loss change, at least one TRP, etc. can also refer to the introduction in the above method embodiment, and will not be described in detail here.

[0231] It can be understood that the communication device shown in the embodiment of the present application can implement the method provided in the embodiment of the present application in the form of hardware, or can implement the method provided in the embodiment of the present application in the form of software, etc., and the embodiment of the present application is not limited to this.

[0232] Please refer to Figure 8, which is an example of a baseband implementation provided in an embodiment of the present application. The baseband may include a processing system of one or more processors. Processors include microprocessors (e.g., X86, ARM), microcontrollers, digital signal processors (DSPs), field programmable gate arrays (FPGAs), graphics processing units (GPUs), programmable logic devices (PLDs), state machines, gating logic, discrete hardware circuits, and other suitable hardware configured to perform various functions. In other words, the processor used in the baseband can be used to implement the method in any of the aforementioned embodiments (such as the method shown in Figure 2 or Figure 3).

[0233] The processing system can be implemented using a bus architecture, typically represented by a bus. The bus can include any number of interconnecting buses and bridges, depending on the specific application and overall design constraints of the processing system. The bus communicatively couples various circuits together, including one or more processors (typically represented by a processor), memory, and computer-readable media (typically represented by a computer-readable medium). The bus can also link various other circuits, such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be described further. The bus interface provides an interface between the bus and the transceiver and between the bus and the interface.

[0234] The transceiver provides a communication interface or means for communicating with various other devices via a wireless transmission medium. The transceiver can be coupled to an antenna array, and the transceiver and antenna array can be used together to communicate with the corresponding network type. At least one interface (e.g., a network interface and / or a user interface) provides a communication interface or means for communicating via an internal bus or via an external transmission medium.

[0235] The processor is responsible for managing the bus and general processing, including executing software stored on a computer-readable medium. When the software is executed by the processor, the software causes the processing system to perform the various functions described below for any particular device.

[0236] The functions that can be implemented by the processor, memory and computer-readable medium may be: encoding, decoding, rate matching, de-rate matching, scrambling, de-scrambling, modulation, demodulation, layer mapping, fast Fourier transform (FFT), inverse fast Fourier transform (IFFT), inverse discrete Fourier transform (IDFT), precoding, resource element (RE) mapping, channel equalization, de-RE mapping, digital beam forming (BF), adding cyclic prefix (CP), removing CP, etc.

[0237] An embodiment of the present application further provides a communication system, which includes a terminal device and a network device, and the terminal device and the network device are used to execute the method in any of the aforementioned embodiments.

[0238] In addition, the present application also provides a computer program, which is used to implement the operations and / or processing performed by the terminal device in the method provided by the present application.

[0239] The present application also provides a computer program, which is used to implement the operations and / or processing performed by the network device in the method provided by the present application.

[0240] The present application also provides a computer-readable storage medium having computer code stored therein. When the computer code is run on a computer, the computer executes the operations and / or processing performed by the terminal device in the method provided in the present application.

[0241] The present application also provides a computer-readable storage medium having computer code stored therein. When the computer code is executed on a computer, the computer executes the operations and / or processing performed by the network device in the method provided by the present application.

[0242] The present application also provides a computer program product, which includes computer code or computer program. When the computer code or computer program is run on a computer, the operations and / or processing performed by the terminal device in the method provided by the present application are executed.

[0243] The present application also provides a computer program product, which includes computer code or computer program. When the computer code or computer program runs on a computer, the operations and / or processing performed by the network device in the method provided by the present application are executed.

[0244] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, or can be electrical, mechanical or other forms of connection.

[0245] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the units may be selected according to actual needs to achieve the technical effects of the solutions provided in the embodiments of the present application.

[0246] 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.

[0247] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a readable storage medium, including a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned readable storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0248] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A communication method, characterized in that: Applied to a terminal device, wherein the terminal device has a communication connection with a plurality of transmission reception points (TRPs), the method includes: determining that a path loss change between the terminal device and at least one TRP among the plurality of TRPs is greater than or equal to a first threshold; Power headroom PH information is sent, where the PH information includes a PH, and a type of the PH corresponds to the at least one TRP.

2. The method according to claim 1, characterized in that The at least one TRP includes a first TRP for sending a downlink signal, the first TRP corresponds to a first type of PH, and the first type of PH includes a PH of a sounding reference signal SRS.

3. The method according to claim 2, characterized in that The PH information also includes a second type of PH, which corresponds to a second TRP among the multiple TRPs. The second type of PH includes a PH of a physical uplink shared channel PUSCH, and the second TRP receives the PUSCH.

4. The method according to claim 3, characterized in that The PUSCH PH includes a PUSCH PH on a first carrier, and the SRS PH includes SRS PHs on a first carrier and a second carrier; wherein the first carrier is used to transmit the PUSCH.

5. The method according to any one of claims 1 to 4, characterized in that The at least one TRP includes a second TRP for receiving an uplink signal, the second TRP corresponds to a second type of PH, and the second type of PH includes a PH of a PUSCH.

6. The method according to claim 5, characterized in that The PH of the PUSCH includes the PH of the PUSCH on a first carrier, where the first carrier is used to transmit the PUSCH.

7. The method according to claim 5 or 6, characterized in that The PH information also includes a first type of PH, where the first type of PH corresponds to a first TRP among the multiple TRPs, the first type of PH includes a PH of an SRS, and the first TRP is used to send a downlink signal.

8. The method according to any one of claims 5 to 7, characterized in that: The method further comprises: receiving first instruction information; Determine the PH of the PUSCH based on the first indication information; The first indication information includes at least one of the following: a path loss value from the terminal device to the second TRP; a difference between a path loss value from the terminal device to the second TRP and a reference path loss value; a difference between the compensated path loss value from the terminal device to the second TRP and a reference compensated path loss value; a difference between an expected received power of the terminal device to the second TRP and a reference expected received power; The difference between the closed-loop power control adjustment amount of the terminal device to the second TRP and the reference closed-loop power control adjustment amount.

9. The method according to claim 8, characterized in that The PH of the PUSCH is determined by the difference between the path loss value from the terminal device to the second TRP and the reference path loss value and the path loss value corresponding to the downlink reference signal.

10. The method according to any one of claims 2 to 4 and claim 7, characterized in that: The SRS is used to estimate a downlink channel.

11. The method according to any one of claims 1 to 10, characterized in that The method further comprises: Receive second indication information, where the second indication information indicates the multiple TRPs.

12. The method according to any one of claims 1 to 11, characterized in that The determining that a path loss change between the terminal device and at least one TRP among the plurality of TRPs is greater than or equal to a first threshold comprises: It is determined that the path loss change is greater than or equal to the first threshold and the first timing times out.

13. A communication method, characterized in that: Applied to a network device, the method includes: Sending second indication information, wherein the second indication information indicates that there is a communication connection between the terminal device and the plurality of TRPs; Power headroom PH information is received, where the PH information includes a PH, a type of the PH corresponds to at least one TRP, a path loss change between the terminal device and the at least one TRP is greater than or equal to a first threshold, and the at least one TRP is included in the multiple TRPs.

14. The method according to claim 13, wherein: The at least one TRP includes a first TRP for sending a downlink signal, the first TRP corresponds to a first type of PH, and the first type of PH includes a PH of a sounding reference signal SRS.

15. The method according to claim 14, characterized in that The PH information also includes a second type of PH, which corresponds to a second TRP among the multiple TRPs. The second type of PH includes a PH of a physical uplink shared channel PUSCH, and the second TRP is used to receive an uplink signal.

16. The method according to claim 15, characterized in that The PUSCH PH includes a PUSCH PH on a first carrier, and the SRS PH includes SRS PHs on a first carrier and a second carrier; wherein the first carrier is used to transmit the PUSCH.

17. The method according to any one of claims 13 to 16, characterized in that: The at least one TRP includes a second TRP for receiving an uplink signal, the second TRP corresponds to a second type of PH, and the second type of PH includes a PH of a PUSCH.

18. The method according to claim 17, characterized in that The PH of the PUSCH includes the PH of the PUSCH on a first carrier, where the first carrier is used to transmit the PUSCH.

19. The method according to claim 17 or 18, characterized in that The PH information also includes a first type of PH, where the first type of PH corresponds to a first TRP among the multiple TRPs, the first type of PH includes a PH of an SRS, and the first TRP is used to send a downlink signal.

20. The method according to any one of claims 17 to 19, characterized in that: The method further comprises: Sending first indication information, where the first indication information includes at least one of the following: a path loss value from the terminal device to the second TRP; a difference between a path loss value from the terminal device to the second TRP and a reference path loss value; a difference between the compensated path loss value from the terminal device to the second TRP and a reference compensated path loss value; a difference between an expected received power of the terminal device to the second TRP and a reference expected received power; The difference between the closed-loop power control adjustment amount of the terminal device to the second TRP and the reference closed-loop power control adjustment amount.

21. The method according to claim 20, characterized in that The PH of the PUSCH is determined by the difference between the path loss value from the terminal device to the second TRP and the reference path loss value and the path loss value corresponding to the downlink reference signal.

22. The method according to any one of claims 14 to 16 and 19, characterized in that: The SRS is used to estimate a downlink channel.

23. A communication device, characterized in that: The method comprises a unit for performing the method according to any one of claims 1 to 22.

24. A communication device, characterized in that: including processor and memory; The memory is used to store instructions; The processor is configured to execute the instructions so that the method according to any one of claims 1 to 22 is performed.

25. A communication device, characterized in that: comprising a logic circuit and an interface, wherein the logic circuit and the interface are coupled; The interface is used to input and / or output code instructions, and the logic circuit is used to execute the code instructions so that the method according to any one of claims 1 to 22 is executed.

26. A computer-readable storage medium, characterized in that The computer-readable storage medium is used to store a computer program. When the computer program is executed, the method according to any one of claims 1 to 22 is performed.

27. A computer program, characterized in that When the computer program is executed, the method according to any one of claims 1 to 22 is performed.

28. A communication system, characterized in that: The communication system includes a terminal device and a network device, the terminal device is used to execute the method according to any one of claims 1 to 12, and the network device is used to execute the method according to any one of claims 13 to 22.

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