Power headroom reporting method and apparatus

Abstract

A power headroom (PH) reporting method and apparatus. In the method, a terminal device sends a first PH and a second PH, wherein the first PH is the PH of a physical uplink shared channel (PUSCH), the second PH is the PH of a channel sounding reference signal (SRS), the first PH is related to a first parameter set, and the second PH is related to a second parameter set. The method facilitates a network device in estimating the PH of the terminal device on the basis of the first PH and the second PH, and can improve the accuracy of PH estimation.

Description

Power headroom reporting method and device

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on February 6, 2024, with application number 202410174277.X and application name “Power Headroom Reporting Method and Device”, the entire contents of which are incorporated by reference into this application. Technical Field

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

[0003] In wireless communication systems, terminal devices can report their power headroom (PH) to network equipment. PH is the difference between the terminal device's nominal maximum transmit power and the estimated physical uplink shared channel (PUSCH) or sounding reference signal (SRS) transmission power. Network equipment uses this information, including the reported power headroom, to perform closed-loop power control and schedule resources for the terminal devices, minimizing interference between multiple devices.

[0004] So, how the terminal device reports PH is still a question to be studied. Summary of the Invention

[0005] The embodiments of the present application provide a method and apparatus for reporting power headroom, which are conducive to improving the accuracy of power headroom estimation.

[0006] In a first aspect, an embodiment of the present application provides a power headroom reporting method, which can be performed by a terminal device. The terminal device here can refer to the terminal device itself or a processor, module, chip, or chip system that implements the method in the terminal device. In this method, the terminal device sends a first power headroom PH and a second PH, where the first PH is a physical uplink shared channel PUSCH and the second PH is a channel sounding reference signal SRS PH. The first PH is related to a first parameter set, and the second PH is related to a second parameter set.

[0007] As can be seen, in the embodiment of the present application, the terminal device reports a first PH and a second PH associated with different parameter sets. This method facilitates the network device to estimate the PH of the terminal device based on the first PH and the second PH, and can improve the accuracy of the PH estimation compared to the network device estimating the PH of the terminal device based on the first PH.

[0008] In one optional embodiment, the SRS is used for downlink channel estimation between the network device and the terminal device. The SRS can be sent by the terminal device to the network device and is used by the network device to perform downlink channel estimation on the channel between the network device and the terminal device. The network device is a network device that has uplink receiving and downlink transmitting functions for the terminal device and can be referred to as a second network device.

[0009] In an optional embodiment, before the terminal device sends the first PH and the second PH, it also receives a first path loss and determines the first PH based on the first path loss. The terminal device receiving the first path loss includes: the terminal device receiving the first path loss from a network device, which is a network device that has an uplink receiving function but does not have a downlink sending function for the terminal device, and the network device can be referred to as a first network device. The terminal device receiving the first path loss from the first network device includes: receiving the first path loss from the first network device via the second network device.

[0010] Alternatively, the first path loss may be the path loss between the terminal device and the first network device. Thus, the terminal device determines the PH of the PUSCH received by the first network device based on the path loss between the terminal device and the first network device. This approach enables the terminal device to report the PH of the PUSCH received by the first network device.

[0011] In another optional implementation, before sending the first PH and the second PH, the terminal device further performs the following steps: receiving an offset; receiving a first downlink reference signal; and determining the first PH based on the first downlink reference signal and the offset.

[0012] The offset is the offset between the third path loss and the first path loss, and the third path loss is associated with the first downlink reference signal. The third path loss and the first downlink reference signal are associated, and the third path loss may be determined based on the first downlink reference signal. Alternatively, the first path loss may be the path loss between the terminal device and the first network device, and the third path loss may be the path loss between the terminal device and the second network device.

[0013] Optionally, the terminal device determines the first PH based on the first downlink reference signal and the offset, including: determining a first path loss based on the first downlink reference signal and the offset; and determining the first PH based on the first path loss. Optionally, the terminal device determines the first path loss based on the first downlink reference signal and the offset, including: determining a third path loss based on the first downlink reference signal; and determining the first path loss based on the third path loss and the offset.

[0014] As can be seen, when the terminal device receives the offset between the third path loss and the first path loss, and the first downlink reference signal used to determine the third path loss, it can determine the first PH based on the offset and the first downlink reference signal. This approach also allows the terminal device to report the PH of the PUSCH received by the first network device.

[0015] Optionally, the terminal device receives an offset, including: the terminal device receives an offset from a second network device; the terminal device receives a first downlink reference signal, including: the terminal device receives a first downlink reference signal from the second network device.

[0016] In an optional implementation, before sending the first PH and the second PH, the terminal device further receives a second downlink reference signal and determines the second PH based on the second downlink reference signal.

[0017] Optionally, the terminal device determines the second PH based on the second downlink reference signal, including: determining a second path loss based on the second downlink reference signal; and determining the second PH based on the second path loss. The second path loss may be the path loss between the terminal device and the second network device. Thus, the terminal device can determine the PH of the SRS received by the second network device based on the path loss between the terminal device and the second network device. This approach enables the terminal device to report the PH of the SRS received by the second network device.

[0018] In addition, the terminal device receives the second downlink reference signal, including: receiving the second downlink reference signal from the second network device.

[0019] Optionally, the second downlink reference signal is the same as or different from the first downlink reference signal. When the second downlink reference signal is the same as the first downlink reference signal, the second path loss and the third path loss may be equal.

[0020] In one optional embodiment, before the terminal device sends the first PH and the second PH, it also receives first indication information, where the first indication information is used to instruct the terminal device to report the second PH. The terminal device receiving the first indication information includes: the terminal device receiving the first indication information from the second network device. This method allows the terminal device to report the PH of the SRS received by the second network device.

[0021] In an optional implementation, before receiving the first indication information, the terminal device also sends second indication information, where the second indication information is used to indicate that the terminal device has the capability to report a PH of type 3. This approach enables the second network device to send the first indication information to the terminal device when the terminal device has the capability to report a PH of type 3.

[0022] In an optional implementation, the first indication information is carried in radio resource control RRC signaling or downlink control information DCI. This approach can save signaling overhead.

[0023] In an optional implementation, the second PH is a PH of type 3. Optionally, the second PH may also be another type of PH defined in the future.

[0024] In a second aspect, embodiments of the present application provide a power headroom reporting method that can be performed by a network device. The network device herein may refer to the network device itself, or to a processor, module, chip, or chip system that implements the method in the network device. In the method, the network device receives a first power headroom PH and a second PH, where the first PH is a PH of a physical uplink shared channel (PUSCH), and the second PH is a PH of a channel sounding reference signal (SRS). The first PH is associated with a first parameter set, and the second PH is associated with a second parameter set.

[0025] As can be seen, in the embodiments of the present application, the network device obtains a first PH and a second PH associated with different parameter sets, which facilitates the network device to estimate the PH of the terminal device based on the first PH and the second PH. Compared with estimating the PH of the terminal device based on the first PH, the network device can improve the accuracy of the PH estimation. In addition, the network device can perform resource scheduling for the terminal device based on the PH estimated in this manner, thereby improving scheduling performance and the uplink capacity of the communication system.

[0026] Optionally, the network device is a network device having an uplink receiving function and a downlink sending function for the terminal device, and the network device can be referred to as a second network device.

[0027] In an optional embodiment, the SRS is used for downlink channel estimation between a network device and a terminal device, and the network device is a second network device. The SRS can be sent by the terminal device to the second network device and used by the second network device to perform downlink channel estimation on the channel between the terminal device and the second network device.

[0028] In an optional embodiment, before receiving the first PH and the second PH, the network device further performs the following steps: sending an offset; and sending a first downlink reference signal. The offset and the first downlink reference signal are used by the terminal device to determine the first PH.

[0029] Optionally, the offset and the first downlink reference signal are used by the terminal device to determine a first path loss, and the first path loss is used by the terminal device to determine a first PH.

[0030] Optionally, the offset is an offset between the third path loss and the first path loss, and the third path loss is associated with the first downlink reference signal. In this case, the first downlink reference signal is used by the terminal device to determine the third path loss, the third path loss and the offset are used by the terminal device to determine the first path loss, and the first path loss is used by the terminal device to determine the first PH.

[0031] Among them, the first path loss can be the path loss between the terminal device and the first network device, the third path loss can be the path loss between the terminal device and the second network device, and the first network device is a network device that has an uplink receiving function but does not have a downlink sending function.

[0032] As can be seen, the second network device can send the offset between the third path loss and the first path loss, as well as the first downlink reference signal used to determine the third path loss, to the terminal device. This approach facilitates the terminal device to determine the first PH based on the offset and the first downlink reference signal, thereby facilitating the second network device to obtain the PH of the PUSCH received by the first network device.

[0033] In an optional implementation, before receiving the first PH and the second PH, the network device further sends a second downlink reference signal, where the second downlink reference signal is used by the terminal device to determine the second PH.

[0034] Optionally, the second downlink reference signal is used by the terminal device to determine a second path loss, and the second path loss is used by the terminal device to determine a second PH. The second path loss may be the path loss between the terminal device and the second network device. Thus, the path loss between the terminal device and the second network device can be used by the terminal device to determine the second PH, thereby facilitating the second network device to obtain the PH of the SRS received by the second network device.

[0035] Optionally, the second downlink reference signal is the same as or different from the first downlink reference signal. When the second downlink reference signal is the same as the first downlink reference signal, the second path loss and the third path loss may be equal.

[0036] In an optional implementation, before receiving the first PH and the second PH, the network device also sends first indication information, where the first indication information is used to instruct the terminal device to report the second PH. This approach facilitates the terminal device to report the PH of the SRS received by the second network device.

[0037] Optionally, when there is a first network device in the communication system that has an uplink receiving function but does not have a downlink sending function for the terminal device, the second network device sends a first indication message to the terminal device. When there is a first network device in the communication system that has an uplink receiving function but does not have a downlink sending function for the terminal device, it indicates that the PUSCH sent by the terminal device needs to be received by the first network device, and the SRS sent by the terminal device for downlink channel estimation needs to be received by the second network device. Then, the transmission paths of the PUSCH and SRS sent by the terminal device are different, and thus the PH of the PUSCH is different from the PH of the SRS. Therefore, in order to estimate the PH of the terminal device more accurately, the network device instructs the terminal device to report the PH of the SRS through the first indication message.

[0038] In an optional implementation, before the network device sends the third indication information, it also receives the second indication information, where the second indication information is used to indicate that the terminal device has the capability to report a PH of type 3. This approach enables the second network device to send the first indication information to the terminal device when the terminal device has the capability to report a PH of type 3.

[0039] In an optional implementation, the first indication information is carried in radio resource control RRC signaling or downlink control information DCI. This approach can save signaling overhead.

[0040] In an optional implementation, the second PH is a PH of type 3. Optionally, the second PH may also be another type of PH defined in the future.

[0041] In a third aspect, an embodiment of the present application further provides a communication device. The communication device has the function of implementing some or all of the functions of the terminal device described in the first aspect above, or implementing some or all of the functions of the network device described in the second aspect above. For example, the functions of the communication device may have the functions of some or all of the embodiments of the terminal device described in the first aspect of the embodiment of the present application, or may have the function of implementing any one of the embodiments of the present application separately. The functions may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

[0042] In one possible design, the communication device may include a processing unit and a communication unit. The processing unit is configured to support the communication device in performing the corresponding functions in the above method. The communication unit is configured to support communication between the communication device and other communication devices. The communication device may also include a storage unit, which is coupled to the processing unit and the communication unit and stores program instructions and data necessary for the communication device.

[0043] In one embodiment, the communication device includes: a processing unit and a communication unit, the device is applied to a terminal device, and the processing unit is used to process signals / signaling;

[0044] The communication unit is used to send a first power margin PH and a second PH, where the first PH is the PH of the physical uplink shared channel PUSCH, and the second PH is the PH of the channel sounding reference signal SRS; the first PH is related to a first parameter set, and the second PH is related to a second parameter set.

[0045] In addition, in this aspect, other optional implementations of the communication device can refer to the relevant content of the first aspect above and will not be described in detail here.

[0046] In another embodiment, the communication device includes: a processing unit and a communication unit, the device is applied to a network device, and the processing unit is used to process signals / signaling;

[0047] The communication unit is configured to receive a first power margin PH and a second PH, where the first PH is a PH of a physical uplink shared channel PUSCH, and the second PH is a PH of a channel sounding reference signal SRS; the first PH is associated with a first parameter set, and the second PH is associated with a second parameter set.

[0048] In addition, in this aspect, other optional implementations of the communication device can refer to the relevant content of the first aspect above and will not be described in detail here.

[0049] As an example, the communication unit may be a transceiver or a communication interface, the storage unit may be a memory, and the processing unit may be a processor.

[0050] In one embodiment, the communication device includes: a processor and a transceiver, the device is applied to a terminal device, and the processor is used to process signals / signaling;

[0051] The transceiver is configured to send a first power margin PH and a second PH, where the first PH is a PH of a physical uplink shared channel PUSCH, and the second PH is a PH of a channel sounding reference signal SRS; the first PH is associated with a first parameter set, and the second PH is associated with a second parameter set.

[0052] In addition, in this aspect, other optional implementations of the communication device can refer to the relevant content of the first aspect above and will not be described in detail here.

[0053] In another embodiment, the communication device includes: a processor and a transceiver, the device is applied to a network device, and the processor is used to process signals / signaling;

[0054] The transceiver is configured to receive a first power margin PH and a second PH, where the first PH is a PH of a physical uplink shared channel PUSCH, and the second PH is a PH of a channel sounding reference signal SRS; the first PH is associated with a first parameter set, and the second PH is associated with a second parameter set.

[0055] In addition, in this aspect, other optional implementations of the communication device can refer to the relevant content of the second aspect above and will not be described in detail here.

[0056] In another embodiment, the communication device is a chip or a chip system. The processing unit may also be embodied as a processing circuit or a logic circuit; and the communication unit may be an input / output interface, an interface circuit, an output circuit, an input circuit, a pin, or related circuits on the chip or chip system.

[0057] During implementation, the processor can be used to perform, for example, but not limited to, baseband-related processing, and the transceiver can be used to perform, for example, but not limited to, radio frequency transceiver processing. The aforementioned devices can be provided on separate chips, or at least partially or entirely on the same chip. For example, the processor can be further divided into an analog baseband processor and a digital baseband processor. The analog baseband processor can be integrated with the transceiver on the same chip, while the digital baseband processor can be provided on a separate chip. With the continuous development of integrated circuit technology, more and more devices can be integrated on the same chip. For example, a digital baseband processor can be integrated with multiple application processors (such as, but not limited to, a graphics processor, a multimedia processor, etc.) on the same chip. Such a chip can be called a system on a chip (SoC). Whether each device is provided independently on different chips or integrated on one or more chips often depends on the needs of the product design. The embodiments of the present application do not limit the implementation form of the aforementioned devices.

[0058] In a fourth aspect, an embodiment of the present application further provides a processor for executing the various methods described above. In the process of executing these methods, the process of sending the above-mentioned information and receiving the above-mentioned information in the above-mentioned methods can be understood as the process of the processor outputting the above-mentioned information and the process of the processor receiving the above-mentioned information input. When outputting the above-mentioned information, the processor outputs the above-mentioned information to the transceiver so that the transceiver can transmit it. After being output by the processor, the above-mentioned information may also need to undergo other processing before reaching the transceiver. Similarly, when the processor receives the above-mentioned information input, the transceiver receives the above-mentioned information and inputs it into the processor. Furthermore, after the transceiver receives the above-mentioned information, the above-mentioned information may need to undergo other processing before being input into the processor.

[0059] For the sending and receiving operations involved in the processor, unless otherwise specified, or unless they conflict with their actual functions or internal logic in the relevant descriptions, they can be more generally understood as processor output, reception, input and other operations, rather than sending and receiving operations directly performed by the RF circuit and antenna.

[0060] During implementation, the processor may be a processor specifically configured to execute these methods, or may be a processor that executes computer instructions in a memory to execute these methods, such as a general-purpose processor. The memory may be a non-transitory memory, such as a read-only memory (ROM), which may be integrated with the processor on the same chip or disposed on separate chips. The embodiments of the present application do not limit the type of memory or the configuration of the memory and the processor.

[0061] In a fifth aspect, an embodiment of the present application further provides a communication system, comprising a terminal device, a first network device, and a second network device. The first network device has an uplink receiving function for the terminal device but does not have a downlink sending function, and the second network device has an uplink receiving function and a downlink sending function for the terminal device. In another possible design, the system may further include other devices / functional network elements that interact with any one or more of the terminal device, the first network device, and the second network device.

[0062] In a sixth aspect, an embodiment of the present application provides a computer-readable storage medium for storing instructions, which, when executed by a computer, implements the method described in the first or second aspect above.

[0063] In a seventh aspect, an embodiment of the present application further provides a computer program product comprising instructions, which, when executed on a computer, implements the method described in the first or second aspect above.

[0064] In an eighth aspect, an embodiment of the present application provides a chip system, which includes a processor and an interface, wherein the interface is used to obtain a program or instruction, and the processor is used to call the program or instruction to implement or support the terminal device to implement the functions involved in the first aspect, or to implement or support the network device to implement the functions involved in the second aspect. For example, determining or processing at least one of the data and information involved in the above method. In one possible design, the chip system also includes a memory, which is used to store program instructions and data necessary for the terminal. The chip system can be composed of chips, or it can include chips and other discrete devices.

[0065] In the ninth aspect, an embodiment of the present application provides a communication device, comprising a processor for executing a computer program or executable instructions stored in a memory, so that when the computer program or executable instructions are executed, the device executes the methods in each possible implementation of the first aspect or the second aspect.

[0066] In one possible implementation, the processor and memory are integrated;

[0067] In another possible implementation, the memory is located outside the communication device.

[0068] The beneficial effects of the third to ninth aspects can refer to the beneficial effects of the first or second aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] FIG1 is a schematic diagram of a system architecture;

[0070] FIG2 is an interactive diagram of a power headroom reporting method provided in an embodiment of the present application;

[0071] FIG3 is an interactive diagram of another power headroom reporting method provided in an embodiment of the present application;

[0072] FIG4 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0073] FIG5 is a schematic structural diagram of another communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0074] The technical solutions in the embodiments of the present application are described clearly and completely below in conjunction with the drawings in the embodiments of the present application.

[0075] To better understand the embodiments of the present application, the following first introduces the system architecture involved in the embodiments of the present application:

[0076] Please refer to Figure 1, which is a diagram of a system architecture. As shown in Figure 1, the system architecture includes but is not limited to a terminal device, a first network device, and a second network device. In addition, the embodiments of the present application do not limit the number of terminal devices, first network devices, and second network devices in the system shown in Figure 1. The system shown in Figure 1 uses the example of a terminal device, a first network device, and a second network device each being one. The second network device may also be referred to as a network device.

[0077] Among them, the first network device has an uplink receiving function for the terminal device but does not have a downlink sending function, and the second network device has an uplink receiving function and a downlink sending function for the terminal device. The first network device has an uplink receiving function for the terminal device but does not have a downlink sending function, which can be: the first network device has an uplink receiving function and a downlink sending function, but the first network device opens the uplink receiving function to the terminal device and does not open the downlink sending function. The second network device has an uplink receiving function and a downlink sending function for the terminal device, which can be: the second network device opens both the uplink receiving function and the downlink sending function to the terminal device. As a result, the terminal device can communicate uplink with the first network device, but cannot communicate downlink; the terminal device can communicate uplink and downlink with the second network device. The first network device can also communicate with the second network device. The system can also perform point-to-point communication, such as communication between multiple terminal devices.

[0078] In addition, as shown in Figure 1, the terminal device is located at the edge of the cell of the second network device, that is, the distance between the terminal device and the second network device is relatively far, while the distance between the terminal device and the first network device is relatively close. Thus, the second network device sends downlink data to the terminal device, and the terminal device sends uplink data to the first network device. For example, the physical uplink control channel (PUCCH), physical uplink shared channel (PUSCH) and channel sounding reference signal (SRS) other than those used for antenna switching (such as SRS1 used for uplink channel estimation by the first network device) sent by the terminal device need to be received by the first network device. And the SRS sent by the terminal device for "antenna switching" (such as SRS2 used for downlink channel estimation by the second network device) needs to be received by the second network device.

[0079] The system architecture shown in Figure 1 can be applied to long-term evolution (LTE) systems, fifth-generation (5G) mobile communication systems, sixth-generation (6G) mobile communication systems, and other systems evolving beyond 6G, as well as narrowband Internet of Things (NB-IoT) systems and wireless fidelity (WiFi) systems.

[0080] In an embodiment of the present application, the first network device is a device deployed in a wireless access network to provide wireless communication functions for a terminal device. The first network device is used to receive an uplink signal from the terminal device. The first network device can be an evolved Node B (eNB or eNodeB) in LTE, or a base station in a 5G / 6G network or a base station in a future evolved public land mobile network (PLMN), a broadband network service gateway (BNG), an aggregation switch, or a non-third generation partnership project (3GPP) access device, etc. Optionally, the first network device in the embodiment of the present application may include various forms of base stations, such as: macro base stations, micro base stations (also called small stations), relay stations, access points, devices that realize base station functions in the future, access points (AP) in WiFi systems, transmitting and receiving points (TRP), transmitting points (TP), mobile switching centers, and devices to devices (D2D), vehicle-to-everything (V2X), and machine-to-machine (M2M) communications that perform base station functions, devices that realize base station functions in communication systems evolved after 5G, integrated access and backhaul (IAB), and may also include centralized units (CU) and distributed units (DU) in cloud radio access networks (C-RAN) systems, non-terrestrial communication networks (non-terrestrial networks), and mobile switching centers. The network equipment in the NTN communication system can be deployed on a high-altitude platform or a satellite, or can be various devices constituting an access node, such as an active antenna unit (AAU) and a baseband unit (BBU), etc., which are not specifically limited in the embodiments of the present application.

[0081] In the embodiments of the present application, the second network device is also a device deployed in a wireless access network to provide wireless communication capabilities for a terminal device. The second network device is configured to receive uplink signals from the terminal device or transmit downlink signals to the terminal device. The implementation of the second network device may refer to the implementation of the first network device and will not be further described.

[0082] In one embodiment, the first network device in the embodiment of the present application is a TRP, and the second network device is a base station in a wireless communication system, such as a base station in a 5G / 6G network. Optionally, both the first network device and the second network device in the embodiment of the present application are TRPs.

[0083] In the embodiments of the present application, a terminal device is an entity on the user side for receiving or transmitting signals, and is used to send uplink signals to a first network device and / or a second network device, or to receive downlink signals from a second network device, or to send sidelink signals to other terminal devices, or to receive sidelink signals from other terminal devices. A terminal device may also be referred to as a terminal. The terminal device may include various handheld devices with wireless communication capabilities, in-vehicle devices, wearable devices, computing devices, or other processing devices connected to a wireless modem. Terminal equipment may also refer to a mobile station (MS), user equipment (UE), access terminal, subscriber unit, user agent, cellular phone, smart phone, wireless data card, personal digital assistant (PDA), tablet computer, wireless modem, handheld device (handset), laptop computer, smart point of sale (POS), customer-premises equipment (CPE), machine type communication (MTC) terminal, communication equipment carried on high-altitude aircraft, wearable device, drone, robot, terminal in D2D, terminal in V2X, virtual reality (VR) terminal device, augmented reality (AR) terminal device, wireless terminal in industrial control, wireless terminal in self-driving, wireless terminal in remote medical, wireless terminal in smart grid, transportation security (transportation) This application does not limit the wireless terminals in smart cities, smart homes, or terminal devices in future communication networks.

[0084] The embodiments disclosed herein will present various aspects, embodiments, or features of the present invention centered around a system comprising multiple devices, components, modules, etc. It should be understood that each system may include additional devices, components, modules, etc., and / or may not include all of the devices, components, modules, etc. discussed in conjunction with the accompanying drawings. Furthermore, combinations of these solutions may also be used.

[0085] In the 5G new radio (NR) wireless communication system, terminal devices can report power headroom (PH) to the next generation Node B (gNB). This process is also called power headroom report (PHR). The NR system supports PH types 1 and 3. PH type 1 is the difference between the terminal device's nominal maximum PUSCH transmission power and the estimated PUSCH transmission power. PH type 3 is the difference between the terminal device's nominal maximum SRS transmission power and the estimated SRS transmission power.

[0086] For NR multi-radio dual connectivity (MR-DC) and uplink (UL) carrier aggregation (CA) communication scenarios, when the radio resource control (RRC) high-level parameter "multiple PHR" is configured to "true", the terminal device uses a multi-entry PHR format to report PH. Among them, if the terminal device is configured with a multi-TRP PUSCH reception feature and the RRC high-level parameter "twoPHRMod" is configured to "enabled", the terminal device reports two PHs. The terminal device may report one type 1 PH and one type 3 PH, or two type 1 PHs, or two type 3 PHs; otherwise, the terminal device reports one type 1 PH or one type 3 PH. In communication scenarios other than NR MR-DC and UL CA, the terminal device uses a single entry PHR format to report a type 1 PH.

[0087] The terminal device reports the PH in a multi-entry PHR format, which can be: the terminal device reports two PHs or: the media access control-control element (MAC CE) includes two PHs. The terminal device reports the PH in a single-entry PHR format, which can be: the terminal device reports one PH or: the MAC CE includes one PH.

[0088] The embodiment of the present application proposes a power headroom reporting method 100. FIG2 is an interactive diagram of the power headroom reporting method 100. The power headroom reporting method 100 is described from the perspective of the interaction between the terminal device and the second network device. The power headroom reporting method 100 includes but is not limited to the following steps:

[0089] S101. A terminal device sends a first PH and a second PH, where the first PH is a PUSCH PH and the second PH is an SRS PH, the first PH is associated with a first parameter set and the second PH is associated with a second parameter set. Correspondingly, a second network device receives the first PH and the second PH.

[0090] The PUSCH may be received by the first network device and originate from the terminal device, and the SRS may be received by the second network device and originate from the terminal device. In other words, the PUSCH may be sent by the terminal device to the first network device, and the SRS may be sent by the terminal device to the second network device.

[0091] Alternatively, the PUSCH is used by the terminal device to send uplink data to the first network device, and the SRS is used for downlink channel estimation between the second network device and the terminal device. When the RRC layer parameter "usage" of the SRS resource set is configured as "antenna switching", the SRS corresponding to the SRS set is the SRS used for downlink channel estimation, for example, the SRS used for downlink channel estimation between the second network device and the terminal device. The SRS corresponding to the SRS resource set can be: the SRS sent by the terminal device using the SRS resource set.

[0092] In one embodiment, the first parameter set is a parameter set related to the PUSCH, for example, the first parameter set is related to one or more of the following: path loss corresponding to PUSCH transmission, power of PUSCH transmission, or frequency domain resources corresponding to the PUSCH. The second parameter set is a parameter set related to the SRS, for example, the second parameter set is related to one or more of the following: path loss corresponding to SRS transmission, power of SRS transmission, or frequency domain resources corresponding to the SRS.

[0093] In one embodiment, the path loss in the first parameter set is different from the path loss in the second parameter set. The path loss in the first parameter set is the path loss corresponding to PUSCH transmission, which can represent PL b,f,c (q u ), where q u Indicates the uplink reference signal index; or, it can be expressed as PL b,f,c (q d )+Δ, where q d represents the downlink reference signal index, Δ represents the path loss offset between the path loss corresponding to SRS transmission and the path loss corresponding to PUSCH transmission. The path loss in the second parameter set is the path loss corresponding to SRS transmission, which can be expressed as PL b,f,c (q d ), where q d Indicates the downlink reference signal index.

[0094] The first parameter set and the second parameter set are described below:

[0095] 1. The first parameter set.

[0096] In an optional embodiment, the first parameter set includes one or more of the following: the maximum transmission power of the terminal device, the expected receiving power of the terminal device transmitting PUSCH, the subcarrier spacing configuration, the frequency domain resources for the terminal device to transmit PUSCH, the path loss factor for the terminal device to transmit PUSCH, the modulation and coding scheme adjustment amount, the PUSCH closed-loop power control adjustment amount, and the terminal device using index q d The downlink path loss estimation is obtained by using the downlink reference signal.

[0097] For example, the first PH is PH type1,b,f,c (i,j,q d ,l), the first PH satisfies the following formula (1):

[0098] Among them, b represents the activation UL part bandwidth (bandwidth part, BWP) index, f represents the carrier index, c represents the serving cell index of the terminal device, i represents the PUSCH transmission opportunity index, j represents the parameter set configuration index, q d represents the downlink reference signal index, l represents the PUSCH closed-loop power control adjustment index, P CMAX,f,c (i) represents the maximum transmission power of the terminal device, P O_PUSCH,b,f,c (j) represents the expected received power of the PUSCH transmitted by the terminal device, μ represents the subcarrier spacing (SCS) configuration, Represents the frequency domain resources used by the terminal device to transmit PUSCH, α b,f,c (j) represents the path loss factor of the terminal device transmitting PUSCH, PL b,f,c (q d ) represents the terminal device using index q d The downlink path loss estimation obtained by the reference signal, Δ TF,b,f,c (i) represents the modulation and coding scheme (MCS) adjustment, f b,f,c (i, l) represents the PUSCH closed-loop power control adjustment value, and RB represents resource block (RB).

[0099] In another optional embodiment, the first parameter set includes one or more of the following: the maximum transmission power of the terminal device, the expected receiving power of the terminal device transmitting PUSCH, the path loss factor of the terminal device transmitting PUSCH, the PUSCH closed-loop power control adjustment amount, and the terminal device using index q d The downlink path loss estimation is obtained by using the reference signal.

[0100] For example, the first PH is PH type1,b,f,c (i,j,q d ,l), the first PH satisfies the following formula (2): 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 )+f b,f,c (i,l)}[dB] (2)

[0101] It can be seen that the terminal device can determine the first PH based on the above formula (1) or formula (2). The first parameter set includes multiple parameters in formula (1) or formula (2).

[0102] Optionally, the first PH that satisfies formula (1) may be referred to as the PH for actual PUSCH transmission, and the first PH that satisfies formula (2) may be referred to as the PH for reference PUSCH transmission. In the embodiment of the present application, the first PH may be the PH for actual PUSCH transmission, or may be the PH for reference PUSCH transmission.

[0103] Based on formula (1) and formula (2), it can be seen that the difference between the PH of the actual transmission PUSCH and the PH of the reference transmission PUSCH is that the PH of the actual transmission PUSCH includes the scheduling of PUSCH by the second network device between the current transmission and the previous transmission of the terminal device, and the PH of the reference transmission PUSCH does not include the scheduling of PUSCH by the second network device between the current transmission and the previous transmission of the terminal device.

[0104] 2. The second parameter set.

[0105] In an optional embodiment, the second parameter set includes one or more of the following: the maximum transmission power of the terminal device, the expected receiving power of the terminal device transmitting SRS, the subcarrier spacing configuration, the frequency domain resource of the terminal device transmitting SRS, the path loss factor of the terminal device transmitting SRS, the SRS closed-loop power control adjustment amount, and the terminal device using index q d The downlink path loss estimation is obtained by using the downlink reference signal.

[0106] For example, the second PH is PH type3,b,f,c (i,q s ), the second PH satisfies the following formula (3):

[0107] Where i represents the SRS transmission opportunity index, q s Represents the SRS resource set index, q d represents the downlink reference signal index, P CMAX,f,c (i) represents the maximum transmission power of the terminal device, P O_SRS,b,f,c (q s ) represents the expected received power of the terminal device transmitting SRS, μ represents the SCS configuration, M SRS,b,f,c (i) represents the frequency domain resource for the terminal device to transmit SRS, α SRS,b,f,c (q s ) represents the path loss factor of the terminal device transmitting SRS, PL b,f,c (q d ) represents the terminal device using index q d The downlink path loss estimation obtained by the reference signal, h b,f,c (i) represents the SRS closed-loop power control adjustment amount. In addition, q s Corresponding to the resource set for transmitting SRS. Specifically, q s The corresponding SRS resource index (such as SRS-ResourceSetId) is the same as the index corresponding to the resource set for transmitting the SRS.

[0108] In another optional embodiment, the first parameter set includes one or more of the following: the maximum transmission power of the terminal device, the expected receiving power of the terminal device transmitting SRS, the path loss factor of the terminal device transmitting SRS, the SRS closed-loop power control adjustment amount, and the terminal device using index q d The downlink path loss estimation is obtained by using the reference signal.

[0109] For example, the second PH is PH type3,b,f,c (i,q s ), the second PH satisfies the following formula (4): 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)}[dB] (4)

[0110] It can be seen that the terminal device can determine the second PH based on the above formula (3) or formula (4). The second parameter set includes multiple parameters in formula (3) or formula (4).

[0111] Optionally, the second PH that satisfies formula (3) can be called the PH for actual SRS transmission, and the second PH that satisfies formula (4) can be called the PH for reference SRS transmission. In the embodiment of the present application, the second PH can be the PH for actual SRS transmission, or can be the PH for reference SRS transmission.

[0112] Based on formula (3) and formula (4), it can be seen that the difference between the PH of the actual transmission SRS and the PH of the reference transmission SRS is that the PH of the actual transmission SRS includes the scheduling of the SRS by the second network device between the current transmission and the previous transmission of the terminal device, and the PH of the reference transmission SRS does not include the scheduling of the SRS by the second network device between the current transmission and the previous transmission of the terminal device.

[0113] In an optional implementation, the first PH is a PH of type 1, and the second PH is a PH of type 3. Optionally, the second PH may also be a PH of another type, such as a PH of a type to be newly defined in the future.

[0114] In an optional implementation, before sending the first PH and the second PH, the terminal device further receives a first path loss and determines the first PH based on the first path loss.

[0115] In one implementation, the first path loss may be a path loss parameter (PL) or path loss indication information, where the path loss indication information is used to indicate a value of the first path loss.

[0116] The terminal device receiving the first path loss includes: receiving the first path loss from the first network device. The terminal device receiving the first path loss from the first network device includes: receiving the first path loss from the first network device through the second network device.

[0117] The first path loss may be the path loss between the terminal device and the first network device, and may be determined by the first network device based on an uplink reference signal or uplink channel from the terminal device. For example, the first path loss is the path loss corresponding to PUSCH transmission. The first path loss is a parameter in the first parameter set. The embodiments of the present application do not limit the uplink reference signal and uplink channel. The uplink reference signal may be an SRS, etc., and the uplink channel may be a physical random access channel (PRACH), etc.

[0118] The first path loss is determined by the first network device based on an uplink reference signal or an uplink channel from the terminal device. The terminal device determines the first PH based on the first path loss. The first PH may be determined based on the following formula (5) or formula (6), that is, the first PH satisfies formula (5) or (6): 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 u )+f b,f,c (i,l)}[dB] (6)

[0119] Among them, q u Indicates uplink reference signal / uplink channel index, PL b,f,c (q u ) indicates the first path loss.

[0120] It can be seen that the first network device can send the first path loss to the terminal device through the second network device, so that the terminal device can determine the PH of the PUSCH received by the first network device based on the first path loss. This method allows the terminal device to report the PH of the PUSCH received by the first network device.

[0121] In another optional implementation, before the terminal device sends the first PH and the second PH, it may also determine the first PH based on the first downlink reference signal and the offset. The first downlink reference signal and / or offset information may be received by the terminal device. Among them, the terminal device receives the offset, including: the terminal device receives the offset from the second network device; the terminal device receives the first downlink reference signal, including: the terminal device receives the first downlink reference signal from the second network device. Accordingly, before the second network device receives the first PH and the second PH, it may also perform the following steps: sending the offset; sending the first downlink reference signal. The offset may be an offset parameter or an offset indication information, and the offset indication information is used to indicate the value of the offset. The specific sending method of the offset may be to send the indication information contained in the RRC or downlink control information (DCI) to the terminal device.

[0122] Optionally, the second network device further determines an offset. Specifically, the second network device determines the offset based on a first uplink path loss and a second uplink path loss. The first uplink path loss is the uplink path loss between the terminal device and the first network device, and the second uplink path loss is the uplink path loss between the terminal device and the second network device.

[0123] The first uplink path loss is determined by the first network device based on the transmit power and receive power of a reference signal from the terminal device. The first uplink path loss is equal to the difference between the transmit power and receive power of the reference signal from the terminal device. The transmit power of the reference signal may be indicated to the first network device by the terminal device via uplink information. The first network device then transmits the determined first uplink path loss to the second network device.

[0124] The second uplink path loss is determined by the second network device based on the transmit power and receive power of the uplink reference signal from the terminal device. The second uplink path loss is equal to the difference between the transmit power and receive power of the uplink reference signal from the terminal device. The transmit power of the reference signal can be indicated by the terminal device to the second network device through uplink information.

[0125] Thus, the second network device determines an offset based on the first uplink path loss from the first network device and the second uplink path loss determined by itself, and further indicates the offset to the terminal device.

[0126] Optionally, the terminal device determines the first PH based on the first downlink reference signal and the offset, including: determining a first path loss based on the first downlink reference signal and the offset; and determining the first PH based on the first path loss.

[0127] The offset may be an offset between the third path loss and the first path loss, and the third path loss is associated with the first downlink reference signal. The third path loss is associated with the first downlink reference signal, and the third path loss may correspond to the first downlink reference signal, or the third path loss may be determined by the terminal device based on the first downlink reference signal. The third path loss may be the path loss between the terminal device and the second network device, or the third path loss may be the path loss corresponding to SRS transmission.

[0128] In one optional embodiment, the terminal device determines the first path loss based on the first downlink reference signal and the offset, including: determining a third path loss based on the first downlink reference signal; and determining the first path loss based on the third path loss and the offset. In this case, the first parameter set may include the offset, the third path loss, and the first path loss.

[0129] Optionally, the terminal device determines a third path loss based on the first downlink reference signal, including: determining the third path loss based on the transmit power of the first downlink reference signal and the receive power of the first downlink reference signal. The third path loss is equal to the difference between the receive power of the first downlink reference signal and the transmit power of the first downlink reference signal. The receive power of the first downlink reference signal may be a reference signal receiving power (RSRP) of the first downlink reference signal received by the terminal device after high-layer filtering. The transmit power of the first downlink reference signal may be indicated by the second network device through RRC or DCI information.

[0130] Optionally, the terminal device determines the first path loss based on the third path loss and the offset, and may determine the first path loss as the sum of the third path loss and the offset. For example, if the third path loss determined by the terminal device is 10 decibels (dB) and the offset is 5, then the first path loss is: 10 + 5 = 15 dB. For another example, if the third path loss determined by the terminal device is 10 dB and the offset is -3, then the first path loss is: 10 - 3 = 7 dB.

[0131] In another optional embodiment, the terminal device determines the first path loss based on the first downlink reference signal and the offset, including: determining the first path loss according to the following calculation formula: first path loss = transmit power of the first downlink reference signal - receive power of the first downlink reference signal + offset, i.e., the first path loss satisfies this calculation formula. For example, if the transmit power of the first downlink reference signal is 50 dB, the receive power of the first downlink reference signal is 40 dB, and the offset is 4 dB, then the first path loss = 50 - 40 + 4 = 14 dB.

[0132] In an optional implementation, the terminal device determines the first path loss based on the third path loss and the offset; in the method of determining the first PH based on the first path loss, the first PH satisfies the following formula (7) or formula (8): 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 )+ΔPL+f b,f,c (i,l)}[dB] (8)

[0133] Among them, q d represents the first downlink reference signal index, ΔPL represents the offset between the third path loss and the first path loss, PL b,f,c (q d ) indicates third-path loss.

[0134] In another optional implementation, the terminal device determines the first path loss based on the third path loss and the offset; in the method of determining the first PH based on the first path loss, the first PH satisfies the following formula (9) or formula (10): 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 )+ΔPL]+f b,f,c (i,l)}[dB] (10)

[0135] Among them, q d represents the first downlink reference signal index, and ΔPL represents the offset between the third path loss and the first path loss.

[0136] As can be seen, the second network device can send the offset between the third path loss and the first path loss, as well as a first downlink reference signal used to determine the third path loss, to the terminal device. Thus, the terminal device can determine the path loss (first path loss) between the terminal device and the first network device based on the offset and the first downlink reference signal. Furthermore, the terminal device can determine the first PH based on the first path loss. This approach also allows the terminal device to report the PH of the PUSCH received by the first network device.

[0137] Optionally, the offset may be an offset corresponding to other forms, which is not limited in the present embodiment. For example, the offset may be an offset corresponding to power, such as the offset corresponding to the received power of the second network device and the received power of the first network device.

[0138] In addition, the embodiment of the present application does not limit the first downlink reference signal. The first downlink reference signal can be a synchronization signal block (synchronization signal / PBCH block, SSB) or a channel state information reference signal (channel state information reference signal, CSI-RS), etc., where PBCH is a physical broadcast channel (physical broadcast channel).

[0139] The order in which the second network device sends the offset can be before or after sending the first downlink reference signal, and this embodiment of the application does not limit this. Therefore, the order in which the terminal device receives the offset can be before or after receiving the first downlink reference signal.

[0140] In an optional embodiment, before the terminal device sends the first PH and the second PH, it also receives a second downlink reference signal and determines the second PH based on the second downlink reference signal. The terminal device receiving the second downlink reference signal includes: receiving the second downlink reference signal from a second network device. Accordingly, before the second network device receives the first PH and the second PH, it also sends the second downlink reference signal to the terminal device. This embodiment of the application does not limit the second downlink reference signal.

[0141] Optionally, the terminal device determines a second PH based on the second downlink reference signal, including: determining a second path loss based on the second downlink reference signal; and determining the second PH based on the second path loss. The second path loss may be a path loss between the terminal device and the second network device, or the second path loss may be a path loss corresponding to SRS transmission. The second path loss is a parameter in the second parameter set.

[0142] Optionally, the terminal device determines the second path loss based on the second downlink reference signal, including: determining the second path loss based on the transmit power of the second downlink reference signal and the receive power of the second downlink reference signal. The second path loss is equal to the difference between the transmit power of the first downlink reference signal and the receive power of the first downlink reference signal. The receive power of the second downlink reference signal may be the RSRP of the second downlink reference signal received by the terminal device after high-layer filtering. The transmit power of the second downlink reference signal may be indicated by the second network device through RRC or DCI information. For example, if the transmit power of the second downlink reference signal is 30 dB and the receive power of the second downlink reference signal is 25 dB, the second path loss is 5 dB.

[0143] In one embodiment, the terminal device determines the second PH based on the second path loss. The terminal device may determine the second PH based on the above formula (3) or formula (4), that is, the second PH satisfies the above formula (3) or formula (4), and the PL in formula (3) or formula (4) is b,f,c (q d ) represents the second path loss, q d Indicates the second downlink reference signal index.

[0144] Optionally, the second downlink reference signal is the same as or different from the first downlink reference signal. When the second downlink reference signal is the same as the first downlink reference signal, the second path loss and the third path loss may be equal. When the second downlink reference signal is different from the first downlink reference signal, the second path loss and the third path loss may be unequal.

[0145] It can be seen that the terminal device can determine the second path loss based on the second downlink reference signal from the second network device, and determine the PH of the SRS received by the second network device based on the second path loss. This method allows the terminal device to report the PH of the SRS received by the second network device.

[0146] In an optional embodiment, before the terminal device sends the first PH and the second PH, it also receives first indication information, where the first indication information is used to indicate the PH of the SRS reported by the terminal device. The terminal device receiving the first indication information includes: the terminal device receiving the first indication information from the second network device. Accordingly, before the second network device receives the first PH and the second PH, it also sends the first indication information to the terminal device.

[0147] Optionally, when there is a first network device in the communication system that has an uplink receiving function but does not have a downlink sending function for the terminal device, the second network device sends a first indication message to the terminal device. When there is a first network device in the communication system that has an uplink receiving function but does not have a downlink sending function for the terminal device, it indicates that the PUSCH sent by the terminal device needs to be received by the first network device, and the SRS sent by the terminal device for downlink channel estimation needs to be received by the second network device. Then, the transmission paths of the PUSCH and SRS sent by the terminal device are different, and thus the PH of the PUSCH is different from the PH of the SRS. Therefore, in order to estimate the PH of the terminal device more accurately, the network device instructs the terminal device to report the PH of the SRS through the first indication message.

[0148] Optionally, the first indication information is carried in RRC signaling or DCI, which can reduce signaling overhead. Optionally, the first indication information can also be carried in other signaling, which is not limited in the embodiment of the present application.

[0149] In an optional implementation, before the second network device sends the first indication information to the terminal device, it also receives second indication information from the terminal device, where the second indication information is used to indicate that the terminal device has the capability of reporting a type 3 PH.

[0150] The terminal device may send the second indication information to the second network device via the first network device. Specifically, the terminal device sends the second indication information to the first network device, and the first network device then forwards the second indication information from the terminal device to the second network device. Thus, when the terminal device has the capability to report a Type 3 PH and the first network device is present in the communication system, the second network device instructs the terminal device to report the SRS PH via the first indication information.

[0151] Optionally, when the terminal device has the ability to report a PH of type 3, it actively sends a second indication message, that is, it actively reports that it has the ability to report a PH of type 3 through the second indication message. The second indication message can be carried in RRC signaling, or can be carried in PUSCH. Optionally, after receiving the UE capability query "UE capability enquiry" RRC layer signaling from the second network device, the terminal device sends the UE capability information "UE capability information" through RRC signaling, that is, sends the second indication message. The RRC signaling sent by the UE is carried in the dedicated control channel (DCCH) logical channel and is sent to the network device through PUSCH at the physical layer. Optionally, the second indication message can also be carried in PUCCH.

[0152] Optionally, when the terminal device does not have the capability to report a PH of type 3, the terminal device sends third indication information to the second network device through the first network device, indicating that the terminal device does not have the capability to report a PH of type 3. Thus, the second network device determines, through the third indication information, that the terminal device does not have the capability to report a PH of type 3.

[0153] Optionally, when the terminal device does not have the ability to report a PH of type 3, the third indication information for indicating that the terminal device does not have the ability to report a PH of type 3 is not sent to save signaling overhead. In this manner, if the second network device does not receive the second indication information, it is assumed that the terminal device does not have the ability to report a PH of type 3.

[0154] Optionally, when the first network device does not exist in the communication system, the second network device does not send the first indication information to the terminal device.

[0155] Optionally, when the first network device exists in the communication system but the terminal device does not have the ability to report a PH of type 3, the second network device does not send the first indication information to the terminal device.

[0156] In an optional implementation manner, the terminal device sends the first PH and the second PH, including: the terminal device sends the first PH and the second PH simultaneously.

[0157] In another optional embodiment, the terminal device sends the first PH and the second PH, which can be understood as: sending the first PH; sending the second PH. The order in which the terminal device sends the first PH can be before sending the second PH or after sending the second PH. This embodiment of the application does not limit this order.

[0158] It can be seen that the actions of the terminal device sending the first PH and sending the second PH can be performed simultaneously or separately, and the embodiment of the present application does not limit this.

[0159] In addition, the terminal device sending the first PH and the second PH includes: the terminal device sending the first PH and the second PH to the second network device through the first network device; or includes: the terminal device sending the first PH and the second PH to the first network device, and the first network device forwarding the first PH and the second PH from the terminal device to the second network device. Or includes: the first network device receives the first PH and the second PH sent by the terminal device, and the first network device sends the first PH and the second PH to the second network device.

[0160] Optionally, the terminal device sending the first PH and the second PH includes: the terminal device sending the first PH and the second PH to the second network device. Correspondingly, the second network device receives the first PH and the second PH sent by the terminal device.

[0161] In an optional implementation, the terminal device may report the first PH and the second PH in a multi-entry PHR format. In this approach, the MAC CE includes the values ​​of the first PH and the second PH.

[0162] In another optional implementation, the terminal device may report the first PH and the second PH using a single-entry PHR format. When the terminal device reports the first PH and the second PH using a single-entry PHR format, the first PH and the second PH are sent separately. When the terminal device sends the first PH, the MAC CE includes the value of the first PH; when the terminal device sends the second PH, the MAC CE includes the value of the second PH.

[0163] Optionally, the terminal device also sends a third PH, which is the PH of the SRS used by the first network device for uplink channel estimation, that is, the PH of the SRS received by the first network device. It can be understood that when the RRC layer parameter "usage" of the SRS resource set is not configured as "antenna switching", or is any one or more combinations of "beam management", "codebook" and "non codebook", the SRS corresponding to the SRS resource set is the SRS used for uplink channel estimation, such as the SRS used for uplink channel estimation by the first network device.

[0164] Optionally, the formula satisfied by the third PH may refer to the above formula (3) or formula (4), and the difference from formula (3) or formula (4) is that h in formula (3) or formula (4) is b,f,c(i) represents the channel information between the terminal device and the first network device. Similarly, the third PH can be the third PH for the terminal device to actually transmit the SRS to the first network device, or it can be the third PH for the terminal device to refer to transmit the SRS to the first network device, which is not limited in this embodiment of the present application.

[0165] Optionally, since the PUSCH sent by the terminal device and the SRS used by the first network device for uplink channel estimation have the same transmission path, the third PH may be equal to the first PH. In this case, the terminal device may not report the third PH.

[0166] Optionally, the method can be applied to a scenario where the terminal device is configured with one uplink carrier, or to a scenario where the terminal device is configured with multiple uplink carriers. In a scenario where the terminal device is configured with one uplink carrier, the terminal device sends a first PH and a second PH, which is beneficial to improving the accuracy of the network device estimating the PH compared to the terminal device sending a PUSCH PH. In a scenario where the terminal device is configured with multiple uplink carriers, the terminal device sends a first PH and a second PH, which is beneficial to improving the accuracy of the network device estimating the PH compared to the terminal device sending a PUSCH PH and an SRS PH with the same numerical value.

[0167] In an optional implementation, after obtaining the first PH and the second PH, the second network device further estimates the PH of the terminal device based on the first PH and the second PH, and performs resource scheduling for the terminal device based on the estimated PH. Thus, when the second network device includes the first network device in the communication system for a terminal device having an uplink receiving function but not a downlink transmitting function, the second network device estimates the PH of the terminal device based on the PH of the PUSCH and the PH of the SRS, rather than estimating the PH of the terminal device based solely on the PH of the PUSCH, thereby improving the accuracy of the PH estimation.

[0168] In this embodiment of the present application, the terminal device reports a first PH and a second PH associated with different parameter sets to the second network device. Thus, the second network device estimates the PH of the terminal device based on the first PH and the second PH associated with the different parameter sets, rather than estimating the PH of the terminal device based on the first PH, thereby improving the accuracy of PH estimation.

[0169] In addition, the second network device performs resource scheduling on the terminal device based on the estimated PH, which can improve the scheduling performance and the uplink capacity of the communication system.

[0170] In the embodiment of the present application, a power headroom reporting method 200 is proposed, taking the first network device as the first TRP and the second network device as the second TRP as an example. FIG3 is an interactive diagram of the power headroom reporting method 200. The power headroom reporting method 200 is also described from the perspective of the interaction between the terminal device and the second TRP. The power headroom reporting method 200 includes but is not limited to the following steps:

[0171] S201. The terminal device sends a first PH and a second PH. The first PH is the PH for the PUSCH, and the second PH is the PH for the SRS. The first PH is determined based on a first path loss, and the second PH is determined based on a second path loss. The first path loss is the path loss between the terminal device and the first TRP, and the second path loss is the path loss between the terminal device and the second TRP. Correspondingly, the second TRP receives the first and second PHs from the terminal device.

[0172] The first TRP has an uplink receiving function for the terminal device but does not have a downlink sending function, and the second TRP has an uplink receiving function and a downlink sending function for the terminal device. In other words, the terminal device can communicate uplink with the first TRP and can communicate uplink and downlink with the second TRP.

[0173] Optionally, the first TRP may also be referred to as an UL-TRP, and the second TRP may also be referred to as a downlink (DL)-TRP. The first TRP and the second TRP may also be referred to as other TRPs, and the embodiments of the present application do not limit their naming.

[0174] In an optional embodiment, the first PH is associated with a first parameter set, and the second PH is associated with a second parameter set. The first parameter set includes a first path loss, and the second parameter set includes a second path loss, where the first path loss and the second path loss are different. Other parameters included in the first parameter set and the second parameter set can be found in the power headroom reporting method 100 above and are not further described.

[0175] In an optional embodiment, the terminal device sends the first PH and the second PH, which can be: the terminal device sends the first PH and the second PH to the second TRP through the first TRP. Alternatively, it can be understood that: the terminal device sends the first PH and the second PH to the first TRP, and the first TRP forwards the first PH and the second PH from the terminal device to the second TRP. Alternatively, it can be understood that: the first PH and the second PH sent by the terminal device are received by the first TRP, and the first TRP then forwards the received first PH and the second PH to the second TRP.

[0176] Optionally, the terminal device sends the first PH and the second PH, which may be: the terminal device sends the first PH and the second PH to the second TRP. Alternatively, the first PH and the second PH sent by the terminal device are received by the second TRP.

[0177] When there is a first TRP in the communication system that has an uplink receiving function but does not have a downlink sending function for a terminal device, the PUSCH sent by the terminal device needs to be received by the first TRP, and the SRS sent for downlink channel estimation needs to be received by the second TRP. Then, the transmission paths of the PUSCH sent by the terminal device and the SRS used for downlink channel estimation are different, and thus the PH of the PHSCH and the PH of the SRS sent for downlink channel estimation are different. Therefore, the terminal device reports the PH of the PUSCH and the PH of the SRS, that is, the terminal device reports both the PH of the PUSCH received by the first TRP and the PH of the SRS received by the second TRP, so as to improve the accuracy of the second TRP's PH estimation of the terminal device.

[0178] In addition, the power headroom reporting method 200 may further include the implementation of the power headroom reporting method 100 described above. For details, please refer to the description of the power headroom reporting method 100 described above, which will not be repeated here.

[0179] It can be seen that in the embodiment of the present application, when there is a first TRP in the communication system for the terminal device that has an uplink receiving function but does not have a downlink sending function, the terminal device reports a first PH determined based on the first path loss between the terminal device and the first TRP, and a second PH determined based on the second path loss between the terminal device and the second TRP. Thus, the second TRP estimates the PH of the terminal device based on the first PH and the second PH. Compared with the method in which the second TRP estimates the PH of the terminal device based on the first PH, this method can improve the accuracy of PH estimation. In addition, the second TRP performs resource scheduling on the terminal device based on the estimated PH, which can improve the scheduling performance and the uplink capacity of the communication system.

[0180] In the embodiment of the present application, a power headroom reporting method 300 is provided, taking the case where the first network device includes a first TRP and a third TRP, and the second network device is a second TRP. The first TRP and the third TRP are TRPs for a terminal device that has an uplink receiving function but does not have a downlink transmitting function, and the second TRP is a TRP for a terminal device that has both an uplink receiving function and a downlink transmitting function. Optionally, the first TRP and the third TRP may also be referred to as UL-TRPs, and the second TRP may also be referred to as DL-TRPs, which are not limited in the embodiment of the present application.

[0181] In the power headroom reporting method 300, the terminal device sends a first PH and a second PH. The first PH is the PH of the PUSCH, and the second PH is the PH of the SRS. The first PH includes the PH of the PUSCH received by the first TRP and the PH of the PUSCH received by the third TRP; the second PH is the PH of the SRS received by the second TRP. The PH of the PUSCH received by the first TRP is determined based on a first path loss, the PH of the PUSCH received by the third TRP is determined based on a fourth path loss, and the second PH is determined based on the second path loss. The first path loss is the path loss between the terminal device and the first TRP, the second path loss is the path loss between the terminal device and the second TRP, and the fourth path loss is the path loss between the terminal device and the third TRP.

[0182] In an optional implementation, the PH of the PUSCH received by the first TRP is related to the first parameter set, the PH of the PUSCH received by the third TRP is related to the third parameter set, and the second PH is related to the second parameter set. The first parameter set, the second parameter set, and the third parameter set are different parameter sets. The first parameter set includes a first path loss, the second parameter set includes a second path loss, and the third parameter set includes a fourth path loss. Other parameters that may be included in the first parameter set and the second parameter set can be found in the above-mentioned power headroom reporting method 100 and will not be repeated here. Other implementations of the third parameter set can refer to the implementation of the first parameter set in the above-mentioned power headroom reporting method 100 and will not be repeated here.

[0183] It is understandable that when the communication system includes a first TRP and a third TRP that have an uplink receiving function but no downlink transmitting function for a terminal device, and a second TRP that has an uplink receiving function and a downlink transmitting function, the PUSCH sent by the terminal device needs to be received by the first TRP and the third TRP, and the SRS sent by the terminal device for downlink channel estimation needs to be received by the second TRP. Then, the PUSCH sent by the terminal device has two different transmission paths, so the terminal device reports the PH of the PUSCH received by the first TRP and the PH of the PUSCH received by the third TRP. In addition, the transmission paths of the PUSCH and SRS sent by the terminal device are also different, and thus the PH of the SRS received by the second TRP is different from the PH of the PUSCH received by the first TRP and the PH of the PUSCH received by the third TRP, so the terminal device also reports the PH of the SRS received by the second TRP. The way in which the terminal device reports the PH of the PUSCH received by the first TRP, the PH of the PUSCH received by the third TRP, and the PH of the SRS received by the second TRP can improve the accuracy of the PH estimation of the terminal device.

[0184] Optionally, the second TRP may also receive the PUSCH sent by the terminal device, that is, the DL-TRP may also receive the PUSCH from the terminal device. In this scenario, the first PH sent by the terminal device may also include the PH of the PUSCH received by the second TRP, and the PH of the PUSCH received by the second TRP is determined based on the second path loss. It can be seen that the first PH sent by the terminal device may include the PH of the PUSCH received by the first TRP, the PH of the PUSCH received by the second TRP, and the PH of the PUSCH received by the third TRP.

[0185] In an optional embodiment, the terminal device sends the first PH and the second PH, which may be: the terminal device sends the first PH and the second PH to the second TRP through the first TRP or the third TRP; or, it may be: the terminal device sends the first PH and the second PH to the first TRP, and the first TRP sends the first PH and the second PH to the second TRP; or, it may be: the terminal device sends the first PH and the second PH to the third TRP, and the third TRP sends the first PH and the second PH to the second TRP. Correspondingly, it may also be: the first TRP receives the first PH and the second PH sent by the terminal device, and the first TRP sends the first PH and the second PH to the second TRP. Alternatively, it may also be: the third TRP receives the first PH and the second PH sent by the terminal device, and the third TRP sends the first PH and the second PH to the second TRP.

[0186] Optionally, the terminal device sends the first PH and the second PH, which may be: the terminal device sends the first PH and the second PH to the second TRP. Correspondingly, it may also be: the second TRP receives the first PH and the second PH sent by the terminal device.

[0187] Optionally, the embodiment of the present application may further include other TRPs in addition to the first TRP, the second TRP and the third TRP. The other TRP may be a TRP for a terminal device having an uplink receiving function but not a downlink transmitting function, or a TRP for a terminal device having both an uplink receiving function and a downlink transmitting function, or other types of TRPs. When the other TRP is a TRP for a terminal device having an uplink receiving function but not a downlink transmitting function, the terminal device also reports the PH of the PUSCH received by the TRP; when the other TRP is a TRP for a terminal device having both an uplink receiving function and a downlink transmitting function, the terminal device also reports the PH of the SRS received by the TRP.

[0188] In addition, the power headroom reporting method 300 may also include the implementation of the power headroom reporting method 100 described above. For details, please refer to the description of the power headroom reporting method 100 described above, which will not be repeated here.

[0189] It can be seen that in the embodiment of the present application, when there is a first TRP and a third TRP in the communication system for the terminal device that has an uplink receiving function but does not have a downlink sending function, and a second TRP that has an uplink receiving function and a downlink sending function, the terminal device reports a first PH determined based on the first path loss between the terminal device and the first TRP, a first PH determined based on the fourth path loss between the terminal device and the third TRP, and a second PH determined based on the second path loss between the terminal device and the second TRP. Thus, the second TRP can estimate the PH of the terminal device based on the three PHs, which can improve the accuracy of the PH estimation. In addition, the second TRP performs resource scheduling on the terminal device based on the estimated PH, which can improve the scheduling performance and the uplink capacity of the communication system.

[0190] With respect to the technical solutions described above, the corresponding device implementation solutions are further described below.

[0191] To implement the various functions of the methods provided in the embodiments of the present application, the terminal device and the second network device may include hardware structures and / or software modules, and implement the aforementioned functions in the form of hardware structures, software modules, or a combination of hardware structures and software modules. Whether a particular function is implemented in the form of hardware structures, software modules, or a combination of hardware structures and software modules depends on the specific application and design constraints of the technical solution.

[0192] As shown in Figure 4, an embodiment of the present application provides a communication device 400. The communication device 400 can be a component of a terminal device (e.g., an integrated circuit, a chip, etc.), or a component of a second network device (e.g., an integrated circuit, a chip, etc.). The communication device 400 can also be other communication units for implementing the method in the method embodiment of the present application. The communication device 400 may include: a communication unit 401 and a processing unit 402. Optionally, a storage unit 403 may also be included.

[0193] In one possible design, one or more units shown in FIG4 may be implemented by one or more processors, or by one or more processors and memory, or by one or more processors and transceivers, or by one or more processors, memories, and transceivers, although this is not limited in the present embodiment. The processors, memories, and transceivers may be provided separately or integrated.

[0194] The communication device 400 has the functions of the terminal device described in the embodiment of the present application, or the functions of the second network device. For example, the communication device 400 includes a module or unit or means corresponding to the steps involved in the terminal device in the above-mentioned method embodiments. The functions or units or means can be implemented by software, or by hardware, or by hardware executing the corresponding software implementation, or by a combination of software and hardware. For details, please refer to the corresponding description in the above-mentioned corresponding method embodiment.

[0195] In one possible design, a communication apparatus 400 may include: a processing unit 402 and a communication unit 401, wherein the apparatus is applied to a terminal device, and the processing unit 402 is configured to process signals / signaling;

[0196] The communication unit 401 is configured to send a first power headroom PH and a second PH, where the first PH is a PH of a physical uplink shared channel PUSCH, and the second PH is a PH of a channel sounding reference signal SRS; the first PH is associated with a first parameter set, and the second PH is associated with a second parameter set.

[0197] In an optional implementation, the SRS is used for downlink channel estimation between the network device and the terminal device.

[0198] In an optional implementation, before sending the first PH and the second PH, the communication unit 401 further performs: receiving a first path loss; and determining the first PH based on the first path loss.

[0199] In another optional implementation, before sending the first PH and the second PH, the communication unit 401 further performs: receiving an offset; receiving a first downlink reference signal; and determining the first PH based on the first downlink reference signal and the offset.

[0200] In an optional implementation manner, before sending the first PH and the second PH, the communication unit 401 further performs: receiving a second downlink reference signal; and determining the second PH based on the second downlink reference signal.

[0201] In an optional implementation, before sending the first PH and the second PH, the communication unit 401 further receives first indication information, where the first indication information is used to instruct the terminal device to report the second PH.

[0202] In an optional implementation, before receiving the first indication information, the communication unit 401 further sends second indication information, where the second indication information is used to indicate that the terminal device has the ability to report a PH of type 3.

[0203] In an optional implementation, the first indication information is carried in radio resource control RRC signaling or downlink control information DCI.

[0204] In an optional embodiment, the second PH is a type 3 PH.

[0205] The embodiments of the present application and the above-mentioned method embodiments are based on the same concept, and the technical effects they bring are also the same. For the specific principles, please refer to the description of the above-mentioned embodiments, which will not be repeated here.

[0206] In another possible design, communication apparatus 400 may include: a processing unit 402 and a communication unit 401, wherein the apparatus is applied to a second network device, and the processing unit 402 is configured to process signals / signaling;

[0207] The communication unit 401 is configured to receive a first power headroom PH and a second PH, where the first PH is a PH of a physical uplink shared channel PUSCH, and the second PH is a PH of a channel sounding reference signal SRS; the first PH is associated with a first parameter set, and the second PH is associated with a second parameter set.

[0208] In an optional implementation, the SRS is used for downlink channel estimation between the network device and the terminal device.

[0209] In an optional implementation, before receiving the first PH and the second PH, the communication unit 401 further performs: sending an offset; sending a first downlink reference signal; and using the offset and the first downlink reference signal to determine the first PH.

[0210] In an optional implementation, before receiving the first PH and the second PH, the communication unit 401 further sends a second downlink reference signal, where the second downlink reference signal is used to determine the second PH.

[0211] In an optional implementation, before receiving the first PH and the second PH, the communication unit 401 further sends first indication information, where the first indication information is used to instruct the terminal device to report the second PH.

[0212] In an optional implementation, before sending the first indication information, the communication unit 401 further receives second indication information, where the second indication information is used to indicate that the terminal device has the ability to report a PH of type 3.

[0213] In an optional implementation, the first indication information is carried in radio resource control RRC signaling or downlink control information DCI.

[0214] In an optional embodiment, the second PH is a type 3 PH.

[0215] The embodiments of the present application and the above-mentioned method embodiments are based on the same concept, and the technical effects they bring are also the same. For the specific principles, please refer to the description of the above-mentioned embodiments, which will not be repeated here.

[0216] The present application also provides a communication device 500. Figure 5 is a schematic diagram of the structure of the communication device 500. The communication device 500 can be a terminal device, or a chip, chip system, or processor that supports the terminal device in implementing the above-mentioned method; or it can be a second network device, or a chip, chip system, or processor that supports the second network device in implementing the above-mentioned method. This device can be used to implement the method described in the above-mentioned method embodiment. For details, please refer to the description of the above-mentioned method embodiment.

[0217] The communication device 500 may include one or more processors 501. The processor 501 may be a general-purpose processor or a dedicated processor. For example, it may be a baseband 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, or a central processing unit (CPU). The baseband processor may be used to process communication protocols and communication data, and the central processing unit may be used to control a communication device (e.g., a base station, a baseband chip, a terminal, a terminal chip, a DU or CU, etc.), execute software programs, and process data from the software programs.

[0218] Optionally, the communication device 500 may include one or more memories 502, on which instructions 504 may be stored. The instructions may be executed on the processor 501, causing the communication device 500 to perform the method described in the above method embodiment. Optionally, the memory 502 may also store data. The processor 501 and memory 502 may be provided separately or integrated together.

[0219] Optionally, the communication device 500 may further include a transceiver 505 and an antenna 506. The transceiver 505 may be referred to as a transceiver unit, a transceiver, or a transceiver circuit, etc., and is configured to implement transceiver functions. The transceiver 505 may include a receiver and a transmitter. The receiver may be referred to as a receiver or a receiving circuit, etc., and is configured to implement a receiving function; the transmitter may be referred to as a transmitter or a transmitting circuit, etc., and is configured to implement a transmitting function.

[0220] In one possible design, the communication apparatus 500 may be applied to a terminal device. Specifically, the transceiver 505 is used to execute S101 in the power headroom reporting method 100 and to execute S201 in the power headroom reporting method 200.

[0221] In another possible design, the communication apparatus 500 may be applied to a second network device. Specifically, the transceiver 505 is used to execute S101 in the power headroom reporting method 100 and to execute S201 in the power headroom reporting method 200.

[0222] Optionally, the processor 501 may store an instruction 503. The instruction 503 runs on the processor 501, which may enable the communication device 500 to perform the method described in the above method embodiment. The instruction 503 may be fixed in the processor 501. In this case, the processor 501 may be implemented by hardware.

[0223] The embodiments of the present application and the method embodiments shown in the above-mentioned power headroom reporting method 100 and the power headroom reporting method 200 are based on the same concept and have the same technical effects. For the specific principles, please refer to the description of the embodiments shown in the above-mentioned power headroom reporting method 100 and the power headroom reporting method 200, which will not be repeated here.

[0224] An embodiment of the present application further provides a communications system, comprising a terminal device, a first network device, and a second network device. The first network device has an uplink receiving function for the terminal device but does not have a downlink sending function, and the second network device has an uplink receiving function and a downlink sending function for the terminal device. In another possible design, the system may further include other devices / functional network elements that interact with any one or more of the terminal device, the first network device, and the second network device.

[0225] An embodiment of the present application further provides a computer-readable storage medium for storing computer software instructions, which, when executed by a communication device, implements the functions of any of the above method embodiments.

[0226] An embodiment of the present application also provides a computer program product for storing computer software instructions, which, when executed by a communication device, implements the functions of any of the above method embodiments.

[0227] The embodiments of the present application also provide a computer program that, when executed on a computer, implements the functions of any of the above method embodiments.

[0228] The terms "first" and "second" in the description, claims and drawings of the embodiments of this application are used to distinguish different objects, rather than to describe a specific order. "First", "second" and the like are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second" and the like may explicitly or implicitly include one or more of the features. In the description of this embodiment, unless otherwise specified, "multiple" means two or more.

[0229] Furthermore, the terms "include," "comprise," and "have," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements, but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to the process, method, product, or apparatus.

[0230] Reference to an "embodiment" in the embodiments of this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it mean that each embodiment is mutually exclusive of another embodiment or an alternative embodiment. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0231] In the embodiments of the present application, "at least one (item)" refers to one or more, "more than one" refers to two or more, 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 represent: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b or c can represent: 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.

[0232] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner to facilitate understanding.

[0233] In the above embodiments, all or part of the embodiments may be implemented by software, hardware, firmware, or any combination thereof. When implemented using software, all or part of the embodiments may be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a high-density digital video disc (DVD)), or a semiconductor medium (eg, an SSD).

[0234] 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 this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A power headroom reporting method, characterized in that: The method comprises: Sending a first power headroom PH and a second PH, where the first PH is a PH of a physical uplink shared channel PUSCH, and the second PH is a PH of a channel sounding reference signal SRS; The first PH is associated with a first parameter set, and the second PH is associated with a second parameter set.

2. The method according to claim 1, characterized in that The SRS is used for downlink channel estimation between a network device and a terminal device.

3. The method according to claim 1 or 2, characterized in that Before sending the first PH and the second PH, the method further includes: Receive the first loss; The first PH is determined based on the first path loss.

4. The method according to claim 1 or 2, characterized in that Before sending the first PH and the second PH, the method further includes: Receive offset; receiving a first downlink reference signal; The first PH is determined based on the first downlink reference signal and the offset.

5. The method according to any one of claims 1 to 4, characterized in that Before sending the first PH and the second PH, the method further includes: receiving a second downlink reference signal; The second PH is determined based on the second downlink reference signal.

6. The method according to any one of claims 1 to 5, characterized in that Before sending the first PH and the second PH, the method further includes: Receive first indication information, where the first indication information is used to instruct the terminal device to report the second PH.

7. The method according to claim 6, characterized in that Before receiving the first indication information, the method further includes: Send second indication information, where the second indication information is used to indicate that the terminal device has the ability to report type 3 PH.

8. The method according to claim 6 or 7, characterized in that The first indication information is carried in radio resource control RRC signaling or downlink control information DCI.

9. The method according to any one of claims 1 to 8, characterized in that The second PH is a type 3 PH.

10. A power headroom reporting method, characterized in that: The method comprises: receiving a first power headroom PH and a second PH, where the first PH is a PH of a physical uplink shared channel PUSCH, and the second PH is a PH of a channel sounding reference signal SRS; The first PH is associated with a first parameter set, and the second PH is associated with a second parameter set.

11. The method according to claim 10, characterized in that The SRS is used for downlink channel estimation between a network device and a terminal device.

12. The method according to claim 10 or 11, characterized in that Before receiving the first PH and the second PH, the method further includes: Send offset; A first downlink reference signal is sent; the offset and the first downlink reference signal are used to determine the first PH.

13. The method according to any one of claims 10 to 12, characterized in that Before receiving the first PH and the second PH, the method further includes: A second downlink reference signal is sent, where the second downlink reference signal is used to determine the second PH.

14. The method according to any one of claims 10 to 13, characterized in that Before receiving the first PH and the second PH, the method further includes: Send first indication information, where the first indication information is used to instruct the terminal device to report the second PH.

15. The method according to claim 14, characterized in that Before sending the first indication information, the method further includes: Receive second indication information, where the second indication information is used to indicate that the terminal device has the ability to report type 3 PH.

16. The method according to claim 14 or 15, characterized in that The first indication information is carried in radio resource control RRC signaling or downlink control information DCI.

17. The method according to any one of claims 10 to 16, characterized in that The second PH is a type 3 PH.

18. A communication device, characterized in that: The communication device comprises a module for executing the method according to any one of claims 1 to 9, or comprises a module for executing the method according to any one of claims 10 to 17.

19. A communication device, characterized in that: The communication device includes a processor, wherein the processor is configured to execute the method according to any one of claims 1 to 9, or configured to execute the method according to any one of claims 10 to 17.

20. A communication system, characterized in that: include: An apparatus for performing the method according to any one of claims 1 to 9, and an apparatus for performing the method according to any one of claims 10 to 17.

21. A computer-readable storage medium, characterized in that The computer-readable storage medium is used to store instructions, which, when executed on a computer, enable the method according to any one of claims 1 to 9 to be executed, or enable the method according to any one of claims 10 to 17 to be executed.

22. A computer program product comprising instructions, characterized in that When the method is executed on a computer, the method according to any one of claims 1 to 9 is executed, or the method according to any one of claims 10 to 17 is executed.

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