Communication method and related apparatus

Abstract

The present application is applied to the technical field of communications. Provided are a communication method and a communication apparatus. The technical solution provided in the present application comprises: a terminal device receiving configuration information, wherein the configuration information comprises related parameters of one or more first resources, the first resources being uplink path loss measurement resources, and each first resource corresponding to one first signal; the terminal device sending first signals corresponding to the one or more first resources; and receiving first indication information, wherein the first indication information indicates a path loss value or a receiving power that corresponds to at least one first resource. In the present application, a terminal device can determine an uplink transmission path loss value between a network device having only an uplink communication function and the terminal device.

Description

Communication method and related device

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on October 31, 2023, with application number 202311438717.X and application name “Communication Methods and Related Devices”, 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 communication methods and related devices. Background Art

[0003] During communication between a base station and a terminal, the terminal needs to determine the uplink path loss on the transmission path between the terminal and the base station, and then determine the transmit power when sending signals to the base station, thereby ensuring the received power of the signal reaching the base station.

[0004] A commonly used method for determining a terminal's uplink path loss is as follows: the base station sends a path loss measurement signal; the terminal measures the power of the received path loss measurement signal and uses the difference or ratio to determine the downlink path loss on the transmission path of the path loss measurement signal from the base station to the terminal, and then uses the downlink path loss as the uplink path loss.

[0005] However, the above method is not applicable to the scenario where the network equipment does not have the ability to send downlink signals. Therefore, how to determine the uplink path loss between the terminal and the base station in this scenario becomes a technical problem that needs to be solved urgently.

[0006] Summary of the Invention

[0007] The present application provides a communication method, a communication device, and a communication system, which can determine the uplink path loss between a terminal and a base station, thereby improving communication performance.

[0008] In a first aspect, the present application provides a communication method and related apparatus, the method being applied to a terminal device. The method comprises: the terminal device receiving configuration information from a network device, the configuration information including parameters related to one or more first resources, wherein the first resource is an uplink path loss measurement resource, and each of the one or more first resources corresponds to a first signal; sending a first signal corresponding to the one or more first resources; and receiving first indication information, the first indication information being used to indicate a path loss value or received power corresponding to at least one of the one or more first resources.

[0009] In this method, the terminal device can obtain the first resource used as an uplink path loss measurement resource based on the configuration of the network device, so that it can send a first signal for path loss measurement based on the first resource, and obtain the path loss value of the first signal determined by the network device or the receiving power of the first signal from the network device, and then determine the uplink path loss value of the first signal, and finally determine the uplink path loss value between the terminal device and the network device.

[0010] In some implementations, the first resource is a sounding reference signal (SRS) resource.

[0011] In some implementations, the related parameters of the first resource include a first parameter, where the first parameter is used to indicate that the first resource is an uplink path loss measurement resource.

[0012] In some implementations, the first parameter is a type parameter, which is used to indicate the type of the first resource. When the type indicated by the first parameter is the first type, it indicates that the first resource is an uplink path loss measurement resource.

[0013] In some implementations, the configuration information is used to configure uplink path loss measurement resources associated with uplink signal resources, where the uplink signal resources include at least one of the following resources: SRS resources, physical uplink control channel PUCCH resources, physical uplink shared channel PUSCH resources, demodulation reference signal DMRS resources, or physical random access channel PRACH (physical random access channel) resources.

[0014] In some implementations, the uplink signal resource includes an SRS resource. If the configuration information does not configure an uplink path loss measurement resource associated with the SRS resource, the SRS resource is the uplink path loss measurement resource.

[0015] In some implementations, before sending the first signal corresponding to one or more first resources, the method further includes: the terminal device determines the transmission power of the first signal.

[0016] Optionally, the transmission power of the first signal is the first transmission power configured by the configuration information, or the transmission power determined according to the path loss corresponding to the first resource.

[0017] In some possible implementations, when the first condition is met, the transmission power of the first signal is the first transmission power; when the first condition is not met, the transmission power of the first signal is the transmission power determined by the path loss value corresponding to the first resource.

[0018] Among them, the first condition includes one or more of the following conditions: the initial first indication information has been received by the terminal device; the initial first indication information has taken effect; the terminal device knows the path loss value corresponding to the first resource; the terminal device has received indication information containing the path loss value corresponding to the first resource within a period of time in the past; the timer corresponding to the first resource has not timed out, and the timer is a timer used to maintain the path loss value corresponding to the first resource.

[0019] In some implementations, the first indication information includes an index of each first resource in the at least one first resource and path loss information corresponding to each first resource.

[0020] In some implementations, for a first resource having the largest or smallest path loss value among at least one first resource, the first indication information includes the path loss value of the first resource; for any other first resource among at least one first resource, the first indication information includes the difference between the path loss value of any other first resource and the path loss value of the first resource.

[0021] In some implementations, the first indication information includes an index of each first resource in at least one first resource and a receiving power corresponding to each first resource; the terminal device calculates a path loss value corresponding to the at least one first resource based on the receiving power of the at least one first resource.

[0022] In some implementations, for a first resource with the largest or smallest receiving power among at least one first resource, the first indication information includes the receiving power of a first resource; for any other first resource among at least one first resource, the first indication information includes the difference between the receiving power of any other first resource and the receiving power of the one first resource.

[0023] In a second aspect, the present application provides a communication method, which is applied to a network device. The method includes: sending configuration information, the configuration information including parameters related to one or more first resources, the first resources being uplink path loss measurement resources, each of the one or more first resources corresponding to a first signal; receiving first signals corresponding to the one or more first resources; and sending first indication information, the first indication information being used to indicate a path loss value or received power corresponding to at least one first resource.

[0024] This method enables the network device to determine the uplink path loss value of the first signal, and ultimately determine the uplink path loss value between the terminal device and the network device.

[0025] In some implementations, the first resource is a sounding reference signal (SRS) resource.

[0026] In some implementations, the related parameters of the first resource include a first parameter, where the first parameter is used to indicate that the first resource is an uplink path loss measurement resource.

[0027] In some implementations, the first parameter is a type parameter, which is used to indicate the type of the first resource. When the type indicated by the first parameter is the first type, it indicates that the first resource is an uplink path loss measurement resource.

[0028] In some implementations, the configuration information is used to configure uplink path loss measurement resources associated with uplink signal resources, and the uplink signal resources include at least one of the following resources: SRS resources, physical uplink control channel PUCCH resources, physical uplink shared channel PUSCH resources, demodulation reference signal DMRS resources, or physical random access channel PRACH resources.

[0029] In some implementations, the uplink signal resource includes an SRS resource. If the configuration information does not configure an uplink path loss measurement resource associated with the SRS resource, the SRS resource is an uplink path loss measurement resource.

[0030] In some implementations, before sending the first indication information, the method further includes: determining a transmission power of the first signal.

[0031] In some implementations, the transmit power of the first signal is the first transmit power configured by the configuration information, or a transmit power determined according to a path loss corresponding to the first resource.

[0032] In some implementations, when the first condition is met, the transmission power of the first signal is the first transmission power; when the first condition is not met, the transmission power of the first signal is the transmission power determined by the path loss value corresponding to the first resource.

[0033] Among them, the first condition includes one or more of the following conditions: the initial first indication information has been received by the terminal device; the initial first indication information has taken effect; the terminal device knows the path loss value corresponding to the first resource; the terminal device has received indication information containing the path loss value corresponding to the first resource within a period of time in the past; or, the timer corresponding to the first resource has not timed out, and the timer is a timer used to maintain the path loss value corresponding to the first resource.

[0034] In some implementations, the first indication information includes an index of each first resource in the at least one first resource and path loss information corresponding to each first resource.

[0035] In some implementations, for a first resource having the largest or smallest path loss value among the at least one first resource, the first indication information includes the path loss value of the first resource; for any other first resource among the at least one first resource, the first indication information includes the difference between the path loss value of any other first resource and the path loss value of the first resource.

[0036] In some implementations, the first indication information includes an index of each first resource in the at least one first resource and a receiving power corresponding to each first resource.

[0037] In some implementations, for a first resource with the largest or smallest receiving power among the at least one first resource, the first indication information includes the receiving power of the one first resource; for any other first resource among the at least one first resource, the first indication information includes the difference between the receiving power of any other first resource and the receiving power of the one first resource.

[0038] In a third aspect, the present application provides a communication device, comprising modules or units for implementing the method in the first aspect and any possible implementation of the first aspect. It should be understood that each module or unit can implement the corresponding function by executing a computer program.

[0039] In a fourth aspect, the present application provides a communication device, comprising modules or units for implementing the method in the second aspect and any possible implementation of the second aspect. It should be understood that each module or unit can implement the corresponding function by executing a computer program.

[0040] In a fifth aspect, the present application provides a communication device, comprising a processor, wherein the processor is configured to execute the communication method described in the first aspect or any possible implementation of the first aspect. The communication device may be a chip or a chip system used in a terminal device.

[0041] The apparatus may further include a memory for storing instructions and data. The memory is coupled to the processor, and when the processor executes the instructions stored in the memory, the method described in the first aspect or any possible implementation thereof may be implemented. The apparatus may further include a communication interface for communicating between the apparatus and other devices. Exemplarily, the communication interface may be a transceiver, circuit, bus, module, or other type of communication interface.

[0042] In a sixth aspect, the present application provides a communication device, comprising a processor, wherein the processor is configured to execute the communication method described in the second aspect or any possible implementation of the second aspect. The communication device may be a chip or chip system used in a network device.

[0043] The apparatus may further include a memory for storing instructions and data. The memory is coupled to the processor, and when the processor executes the instructions stored in the memory, the method described in the second aspect or any possible implementation thereof may be implemented. The apparatus may further include a communication interface for communicating between the apparatus and other devices. Exemplarily, the communication interface may be a transceiver, circuit, bus, module, or other type of communication interface.

[0044] In a seventh aspect, the present application provides a computer-readable storage medium storing a program code for execution by a communication device, the program code including instructions for implementing the method in the first aspect and any possible implementation manner of the first aspect.

[0045] In an eighth aspect, the present application provides a computer-readable storage medium storing a program code for execution by a communication device, wherein the program code includes instructions for implementing the method in the second aspect and any possible implementation manner of the second aspect.

[0046] In a ninth aspect, the present application provides a computer program product comprising instructions, which, when executed on a communication device, enables the communication device to implement the method in the first aspect and any possible implementation of the first aspect.

[0047] In a tenth aspect, the present application provides a computer program product comprising instructions, which, when executed on a communication device, enables the communication device to implement the method in the second aspect and any possible implementation of the second aspect.

[0048] In the eleventh aspect, the present application provides a communication system, which includes a communication device for implementing the method in the first aspect and any possible implementation of the first aspect and / or a communication device for implementing the method in the second aspect and any possible implementation of the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] FIG1 is a schematic diagram of a communication system applicable to the method of an embodiment of the present application;

[0050] FIG2 is a schematic diagram of another communication system applicable to the method of an embodiment of the present application;

[0051] FIG3 is a schematic flow chart of a communication method provided in one embodiment of the present application;

[0052] FIG4 is a schematic flow chart of a communication method provided in one embodiment of the present application;

[0053] FIG5 is a schematic structural diagram of a communication device according to an embodiment of the present application;

[0054] FIG6 is a schematic structural diagram of a communication device provided in yet another embodiment of the present application. DETAILED DESCRIPTION

[0055] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0056] To facilitate the clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, the words "first" and "second" are used to distinguish between identical or similar items with substantially the same functions and effects. Those skilled in the art will understand that the words "first" and "second" do not limit the quantity or execution order, and the words "first" and "second" do not necessarily mean different.

[0057] It should be noted that 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 in this application as "exemplary" or "for example" 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.

[0058] In the embodiments of the present application, "at least one" refers to one or more, and "more" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, 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 and (or) c can represent: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.

[0059] To facilitate understanding of the communication method provided in the embodiments of the present application, the system architecture and application scenarios of the communication method provided in the embodiments of the present application are described below. It is understood that the system architecture and application scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application and do not constitute a limitation on the technical solutions provided in the embodiments of the present application.

[0060] The technical solutions provided in this application can be applied to various communication systems, such as: fifth generation (5G) or new radio (NR) systems, long term evolution (LTE) systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, wireless local area networks (WLAN) systems, satellite communication systems, future communication systems, such as future mobile communication systems, or fusion systems of multiple systems. The technical solutions provided in this application can also be applied to device to device (D2D) communication, vehicle-to-everything (V2X) communication, machine to machine (M2M) communication, machine type communication (MTC), and Internet of Things (IoT) communication systems or other communication systems.

[0061] A device in a communication system can send signals to or receive signals from another device. These signals may include information, signaling, or data. The term "device" can also be replaced by an entity, network entity, communication device, communication module, node, communication node, etc. This application uses devices as an example for description. For example, a communication system may include at least one terminal device and at least one network device. A network device can send downlink signals to a terminal device, and / or a terminal device can send uplink signals to a network device.

[0062] In an embodiment of the present application, the terminal device may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device.

[0063] The terminal device may be a device that provides voice / data, such as a handheld device or vehicle-mounted device with a wireless connection function. At present, some examples of terminals are: mobile phones, tablet computers, laptop computers, PDAs, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, wearable devices, terminal devices in 5G networks or future evolved public land mobile communication networks (PLMNs). The terminal equipment in the network (PLMN), etc., is not limited to this in the embodiments of the present application.

[0064] As an example and not a limitation, in the embodiment of the present application, the terminal device may also be a wearable device. Wearable devices may also be called wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear, such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also achieve powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include those that are fully functional, large in size, and can achieve complete or partial functions without relying on smartphones, such as smart watches or smart glasses, as well as those that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various smart bracelets and smart jewelry for vital sign monitoring.

[0065] In the embodiments of the present application, the device for realizing the function of the terminal device can be a terminal device, or a device capable of supporting the terminal device to realize the function, such as a chip system, which can be installed in the terminal device or used in combination with the terminal device. In the embodiments of the present application, the chip system can be composed of a chip, or it can include a chip and other discrete devices. In the embodiments of the present application, only the terminal device is used as an example for description, and the embodiments of the present application are not limited to the solutions of the embodiments of the present application.

[0066] The network device in the embodiments of the present application may be a device for communicating with a terminal device, and may also be referred to as an access network device or a radio access network device. For example, the network device may be a base station. The network device in the embodiments of the present application may refer to a radio access network (RAN) node (or device) that connects a terminal device to a wireless network. A base station may broadly cover various names as follows, or replace the following names, such as: NodeB, evolved NodeB (eNB), next generation NodeB (gNB), relay station, access point, transmitting and receiving point (TRP), transmitting point (TP), master station, secondary station, multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), radio unit (RU), positioning node, etc. A base station may be a macro base station, a micro base station, a relay node, a donor node, or the like, or a combination thereof. The base station may also refer to a communication module, modem or chip that is set in the aforementioned equipment or device. The base station may also be a mobile switching center and a device that performs the base station function in D2D, V2X, and M2M communications, a network side device in a 6G network, a device that performs the base station function in future communication systems, etc. The base station can support networks with the same or different access technologies. Optionally, the RAN node may also be a server, a wearable device, a vehicle or an on-board device, etc. For example, the access network device in the vehicle to everything (V2X) technology may be a road side unit (RSU). The embodiments of the present application do not limit the specific technology and specific device form adopted by the network equipment.In some deployments, the network devices mentioned in the embodiments of the present application may include a CU, a DU, or both a CU and a DU, or a control plane CU node (central unit-control plane (CU-CP)), a user plane CU node (central unit-user plane (CU-UP)), and a DU node. For example, the network devices may include a gNB-CU-CP, a gNB-CU-UP, and a gNB-DU.

[0067] In some deployments, multiple RAN nodes collaborate to assist terminals in achieving wireless access, with different RAN nodes implementing portions of the base station's functionality. For example, a RAN node can be a CU, DU, CU-CP, CU-UP, or RU. The CU and DU can be separate or included in the same network element, such as the BBU. The RU can be included in a radio frequency device or radio unit, such as an RRU, AAU, or RRH.

[0068] The RAN node may support one or more types of fronthaul interfaces, with different fronthaul interfaces corresponding to DUs and RUs with different functions. If the fronthaul interface between the DU and the RU is a common public radio interface (CPRI), the DU is configured to implement one or more baseband functions, and the RU is configured to implement one or more radio frequency functions. If the fronthaul interface between the DU and the RU is another type of interface, relative to the CPRI, some of the downlink and / or uplink baseband functions, such as precoding, digital beamforming (BF), or one or more of inverse fast Fourier transform (IFFT) / cyclic prefix (CP) for downlink, are moved from the DU to the RU for implementation; and for uplink, one or more of digital beamforming (BF), or fast Fourier transform (FFT) / cyclic prefix (CP) removal, are moved from the DU to the RU for implementation. In one possible implementation, the interface may be an enhanced common public radio interface (eCPRI). In the eCPRI architecture, the division between the DU and RU is different, corresponding to different types (category, Cat) of eCPRI, such as eCPRI Cat A, B, C, D, E, and F.

[0069] Taking eCPRI Cat A as an example, for downlink transmission, based on layer mapping, the DU is configured to implement layer mapping and one or more functions preceding it (i.e., coding, rate matching, scrambling, modulation, and layer mapping). Other functions after layer mapping (e.g., resource element (RE) mapping, digital beamforming (BF), or one or more of inverse fast Fourier transform (IFFT) / cyclic prefix (CP) addition) are moved to the RU for implementation. For uplink transmission, based on RE demapping, the DU is configured to implement demapping and one or more functions preceding it (i.e., decoding, rate matching, descrambling, demodulation, inverse discrete Fourier transform (IDFT), channel equalization, and RE demapping). Other functions after demapping (e.g., digital BF or one or more of fast Fourier transform (FFT) / CP removal) are moved to the RU for implementation. It is understandable that for the functional description of DU and RU corresponding to various types of eCPRI, reference can be made to the eCPRI protocol, which will not be described in detail here.

[0070] In one possible design, the processing unit for implementing baseband functions in the BBU is called a baseband high layer (BBH) unit, and the processing unit for implementing baseband functions in the RRU / AAU / RRH is called a baseband low layer (BBL) unit.

[0071] In different systems, CU (or CU-CP and CU-UP), DU or RU may also have different names, but those skilled in the art can understand their meanings. For example, in the ORAN (Open RAN) system, CU may also be called O-CU (Open CU), DU may also be called O-DU, CU-CP may also be called O-CU-CP, CU-UP may also be called O-CU-UP, and RU may also be called O-RU. Any unit of CU (or CU-CP, CU-UP), DU and RU in this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0072] In the embodiments of the present application, the device for implementing the functions of the network device can be a network device; it can also be a device that can support the network device to implement the functions, such as a chip system, a hardware circuit, a software module, or a hardware circuit and a software module. The device can be installed in the network device or used in conjunction with the network device. In the embodiments of the present application, only the device for implementing the functions of the network device is used as an example to illustrate, and does not constitute a limitation on the solutions of the embodiments of the present application.

[0073] The network device and / or terminal device can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; it can also be deployed on the water surface; it can also be deployed on aircraft, balloons and satellites in the air. The embodiments of this application do not limit the scenarios in which the network device and the terminal device are located. In addition, the terminal device and the network device can be hardware devices, or they can be software functions running on dedicated hardware, software functions running on general-purpose hardware, such as virtualization functions instantiated on a platform (e.g., a cloud platform), or entities including dedicated or general-purpose hardware devices and software functions. This application does not limit the specific forms of the terminal device and the network device.

[0074] In the embodiments of this application, beamforming refers to a special directional transmission or reception effect created by a transmitter or receiver of a network device or terminal device using an antenna array, much like a flashlight focusing light in a single direction to form a beam. Transmitting and receiving signals using beamforming can effectively increase the signal's transmission distance.

[0075] Furthermore, the beam can be a wide beam, a narrow beam, or other types of beams. The beam forming technology can be beamforming technology or other technologies. The beamforming technology can specifically be digital beamforming technology, analog beamforming technology, or hybrid digital / analog beamforming technology.

[0076] Beams generally correspond to resources. For example, during beam measurement, network equipment uses different resources to measure different beams. The terminal device then provides feedback on the measured resource quality, allowing the network equipment to determine the quality of the corresponding beam. During data transmission, beam information is also indicated by its corresponding resource. For example, the network equipment uses the TCI field in the DCI to indicate a TCI-state. The terminal device then determines the beam to use based on the reference resource contained in the TCI-state.

[0077] In communication protocols, a beam can be specifically characterized as a digital beam, an analog beam, a spatial domain filter, a spatial filter, a spatial parameter, a transmission configuration indication (TCI), or a TCI-state. A beam used for transmitting signals can be called a transmission beam (or Tx beam), a spatial domain transmission filter, a spatial transmission filter, a spatial domain transmission parameter, or a spatial transmission parameter. A beam used for receiving signals can be called a reception beam (or Rx beam), a spatial domain reception filter, a spatial reception filter, a spatial domain reception parameter, or a spatial reception parameter.

[0078] Beams are uniformly used in this application for explanation, but it should be understood that the beams in this application can be replaced by other equivalent concepts and are not limited to the concepts mentioned above.

[0079] In an embodiment of the present application, the resource may be an uplink signal resource, which may be referred to as an uplink signal resource. Uplink signals include but are not limited to a sounding reference signal (SRS) and a demodulation reference signal (DMRS). Downlink signals include but are not limited to a channel state information reference signal (CSI-RS), a cell specific reference signal (CS-RS), a UE specific reference signal (US-RS), a demodulation reference signal (DMRS), and a synchronization system / physical broadcast channel block (SS / PBCH block). SS / PBCH block may be referred to as a synchronization signal block (SSB).

[0080] In communication protocols, reference signals are configured as resources. Network devices allocate each reference signal to terminal devices as a resource. A resource is a configuration information unit that typically includes parameters related to a reference signal, such as the reference signal's time-frequency resource location, number of ports, and time domain type (periodic, semi-static, or aperiodic).

[0081] For optimal transmission, both the network and the terminal device must use the correct beam for uplink and downlink transmission. During uplink transmission, the network device also needs to indicate to the terminal device which uplink transmission beam to use, as the network device knows which beam is optimal for the terminal device. The uplink beam can be indicated using the TCI-state. Specifically, the beam used for uplink transmission is indicated by the downlink TCI-state.

[0082] In the 3GPP protocol, the network device indicates the specific TCI-state to the terminal device through the TCI (Transmission Configuration Index) field in the downlink control information (DCI). The TCI field size is 3 bits and can specifically represent 8 different field values ​​(codepoints). Each field value of the TCI field can be associated with a TCI-state index, and the TCI-state index can uniquely identify a TCI-state. The TCI-state can be a downlink TCI-state or an uplink TCI-state. Each field value of the TCI field can also be associated with two TCI-state indexes, and the two TCI-state indexes can uniquely identify two TCI-states. The two TCI-states can be a downlink TCI-state and an uplink TCI-state, or two downlink TCI-states, or two uplink TCI-states.

[0083] Figure 1 is a schematic diagram of a communication system applicable to the methods of embodiments of the present application. As shown in Figure 1 , communication system 100 may include at least one network device, such as network device 110 shown in Figure 1 ; communication system 100 may also include at least one terminal device, such as terminal device 120 and terminal device 130 shown in Figure 1 .

[0084] The network device 110 and the terminal device 120 and the terminal device 130 may communicate via a wireless link. The communication devices in the communication system, for example, the network device 110 and the terminal device 120 and the terminal device 130 may communicate via a multi-antenna technology.

[0085] In some possible scenarios, the network device 110 may only have an uplink receiving function but not a downlink sending function.

[0086] Figure 2 is a schematic diagram of another communication system applicable to the method of an embodiment of the present application. As shown in Figure 2, the terminal device includes a processor 211, a memory 212, and a transceiver 213. The transceiver 213 includes a transmitter 2131, a receiver 2132, and an antenna 2133. The network device includes a processor 221, a memory 222, and a transceiver 223. The transceiver 223 includes a transmitter 2231, a receiver 2232, and an antenna 2233.

[0087] The processor 211 , the memory 212 , and the transceiver 213 communicate with each other through an internal connection path, and the processor 221 , the memory 222 , and the transceiver 223 communicate with each other through an internal connection path.

[0088] Receiver 2132 may be configured to receive transmission control information via antenna 2133, and transmitter 2131 may be configured to send transmission feedback information to a network device via antenna 2133. Transmitter 2231 may be configured to send transmission control information to a terminal device via antenna 2233, and receiver 2232 may be configured to receive transmission feedback information sent by the terminal device via antenna 2233.

[0089] In some possible scenarios, the network device in FIG. 2 may only have an uplink receiving function but not a downlink sending function.

[0090] It should be noted that Figures 1 and 2 are simplified schematic diagrams for ease of understanding. In actual applications, the communication system may include multiple network devices and multiple terminal devices. The embodiments of the present application do not limit the number of network devices and terminal devices included in the communication system.

[0091] The following describes an exemplary application scenario of the communication method of the present application. During uplink transmission from a terminal to a base station, the terminal device needs to determine the appropriate transmit power based on the path loss (referred to as path loss) of the uplink signal propagation to ensure that the signal strength meets the requirements when it reaches the network device, i.e., achieves the target received power. The greater the path loss, the higher the uplink transmit power. Therefore, before performing an uplink transmission, the terminal device needs to determine the value of the uplink path loss.

[0092] The specific method for determining the uplink path loss is: the network device sends a path loss measurement signal to the terminal device, the terminal device measures the received power of the path loss measurement signal, and finally calculates the downlink path loss based on the transmitted power and received power of the path loss measurement signal, and treats the downlink path loss as the uplink path loss.

[0093] One method for calculating the path loss is to divide the transmission power (unit: milliwatt, mw) of the path loss measurement signal by the reception power of the path loss measurement signal to obtain the path loss value, that is, how many times the signal has attenuated.

[0094] Another method for calculating path loss is to subtract the received power of the path loss measurement signal from the transmitted power (in dBm) of the path loss measurement signal to obtain the path loss value, i.e., the attenuation in dB. For example, if the transmitted power of the path loss measurement signal is 40 dBm and the received power is -40 dBm, the path loss value is 40 - (-40) = 80 dB.

[0095] It should be noted that the path loss measurement signal parameters are configured for the terminal device in the form of path loss measurement resources. For example, the synchronization signal and PBCH block (SS / PBCH block, SSB) or the channel state information-reference signal (CSI-RS) can be used as the path loss measurement signal.

[0096] For network devices with only uplink reception capabilities, terminal devices also need to determine uplink transmit power based on the path loss value when performing uplink transmissions to them. However, since these network devices do not transmit downlink signals, it is impossible to measure the path loss value by measuring the path loss measurement signals they transmit. To address this problem, this application proposes a new communication method.

[0097] Figure 3 is a schematic flow chart of a communication method provided in an embodiment of the present application. As shown in Figure 3, the method may include S310 to S340.

[0098] S310: The network device sends configuration information to the terminal device. Correspondingly, the terminal device receives the configuration information from the network device.

[0099] As an example, the configuration information is used to configure resources, or in other words, the configuration information is used to configure uplink resources, or in other words, the configuration information is used to configure resources of uplink signals.

[0100] If the resources configured in the configuration information are used to transmit an uplink path loss measurement signal, or if the resources configured in the configuration information are for transmitting an uplink path loss measurement signal, then the configuration information can be said to be used to configure a path loss measurement resource or to be used to configure an uplink path loss measurement resource, and the configured resource is an uplink path loss measurement resource. For simplicity of description, the uplink path loss measurement resource in the embodiments of the present application may be referred to as a path loss measurement resource, and the uplink path loss measurement signal may be referred to as a path loss measurement signal.

[0101] As an example, the configuration information may be carried in radio resource control (RRC) signaling, downlink control information (DCI), and media access control-control element (MAC-CE) signaling.

[0102] As an example, the configuration information may be understood to include configuration parameters related to the path loss measurement signal. For example, the configuration information may include configuration parameters related to one or more path loss measurement resources.

[0103] As an example, path loss measurement resources and path loss measurement signals have a one-to-one correspondence. Therefore, in some descriptions, the two can be used interchangeably. For example, the description of configuring a path loss measurement resource can be replaced with the path loss measurement signal, and described as configuring the path loss measurement signal.

[0104] As an example, the path loss measurement resource can be understood as a resource used to transmit a path loss measurement signal. The path loss measurement signal corresponding to the path loss measurement resource can be understood as a path loss measurement signal transmitted using the path loss measurement resource.

[0105] As an example, the path loss measurement signal may be a sounding reference signal (SRS), a demodulation reference signal (DMRS), a phase tracking reference signal (PTRS), or a physical random access channel (PRACH). The DMRS may be a DMRS of a physical uplink control channel (PUCCH) or a DMRS of a physical uplink shared channel (PUSCH).

[0106] As an example, the path loss measurement resources include at least one of the following resources: SRS resources, DMRS resources, PTRS resources, PUCCH resources, PUSCH resources, PRACH resources, etc.

[0107] The following describes how to configure the path loss measurement resource using the SRS resource as an example. These methods are also applicable to the other resources described above, simply replacing the SRS resource with one of the other resources. It should be understood that the path loss measurement resource in the following method for configuring the path loss measurement resource can be replaced with a path loss measurement signal, and the SRS resource can be replaced with an SRS.

[0108] In some possible implementations, an SRS resource specifically used for path loss measurement may be introduced. A parameter may be used to indicate that the SRS resource is a resource specifically used for path loss measurement, or in other words, to indicate that the SRS resource is a path loss measurement resource. For ease of description, this parameter may be referred to as the first parameter.

[0109] The first parameter may be a parameter specifically used to indicate whether the SRS resource is used for path loss measurement; the first parameter may also be a type parameter or a usage parameter of the SRS resource. When the type parameter or usage parameter is configured as the first type, the first usage, or the first value, it indicates that the SRS resource is suitable for uplink path loss measurement. It is understood that the meaning of the first type, the first usage, or the first value may be pre-agreed and known in advance by the terminal and the network device.

[0110] In some possible implementations, whether an SRS resource is a path loss measurement resource can be determined based on whether the SRS resource is configured with a corresponding path loss measurement resource. If an SRS resource is not configured with a corresponding path loss measurement resource, it indicates that the SRS resource itself is an SRS resource for path loss measurement. If an SRS resource is configured with a corresponding path loss measurement resource, it indicates that the SRS resource is not an SRS resource for path loss measurement.

[0111] As an example, for an uplink signal resource, its configuration information can also be used to configure the path loss measurement resource corresponding to the uplink signal resource, or in other words, its configuration information can include relevant parameters of the path loss measurement resource corresponding to the uplink signal resource. If the configuration information of the uplink signal resource does not configure the uplink path loss measurement resource corresponding to the uplink signal resource, then the uplink path loss resource is an uplink path loss measurement resource. If the configuration information of the uplink signal resource configures the uplink path loss measurement resource corresponding to the uplink signal resource, then the uplink path loss resource is not an uplink path loss measurement resource. It can be understood that the uplink signal resource in this paragraph can be replaced with the uplink signal.

[0112] In the embodiment of the present application, the uplink signal resource corresponds to the path loss measurement resource. It can be understood that the path loss value based on the transmission power of the uplink signal sent using the uplink signal resource is measured based on the reception power and transmission power of the path loss measurement signal sent by the path loss measurement resource corresponding to the uplink signal resource.

[0113] As an example, the uplink signal resource includes at least one of the following resources: SRS resource, physical uplink control channel PUCCH resource, physical uplink shared channel PUSCH resource, demodulation reference signal DMRS resource, or physical random access channel PRACH resource.

[0114] As an example, the corresponding path loss measurement resources may be indicated for PUCCH resources, PUSCH resources, or SRS resources through RRC configuration information or MAC-CE.

[0115] As an example, for PUCCH resources, a corresponding path loss measurement resource may be configured for each PUCCH resource, or a corresponding path loss measurement resource may be configured for each PUCCH resource group.

[0116] As an example, for PUSCH resources, a corresponding path loss measurement resource may be configured for each PUSCH resource, or a corresponding path loss measurement resource may be configured for each PUSCH resource group.

[0117] As an example, for SRS resources, a corresponding path loss measurement resource can be configured for each SRS resource, or a corresponding path loss measurement SRS resource can be configured for each SRS resource group (such as an SRS resource set). The corresponding path loss measurement SRS resource can also be indicated for PUCCH, PUSCH or SRS through MAC-CE.

[0118] In some possible implementations, the path loss measurement resource may be configured in the TCI-state, which is a parameter used in uplink transmission and is used to determine which transmission beam to use for uplink transmission.

[0119] If the path loss measurement resource is configured in the TCI-state, then the uplink signal using the TCI-state corresponds to the path loss measurement resource, that is, the transmission of the uplink signal can use the path loss value corresponding to the path loss measurement resource.

[0120] As an example, the TCI-state may include a path loss measurement resource, and all uplink signals (such as PUCCH, PUSCH or SRS) using the TCI-state correspond to the path loss measurement resource.

[0121] As another example, a TCI-state may include multiple path loss measurement resources, each corresponding to an uplink signal (such as PUCCH, PUSCH, or SRS). For example, a TCI-state may include three path loss measurement resources, corresponding to the PUCCH, PUSCH, and SRS using the TCI-state.

[0122] In this embodiment, it is understood that when a network device does not have a downlink communication function, the network device may send the configuration information to the terminal via a network device that has a downlink communication function. For example, the network device may send the configuration information to a network device that has a downlink communication function, and the network device that has a downlink communication function may forward or transparently transmit the configuration information to the terminal.

[0123] S320: The terminal device sends a path loss measurement signal, and the network device receives the path loss measurement signal accordingly.

[0124] It can be understood that the terminal device needs to determine the transmission power of the path loss measurement signal and transmit the path loss measurement signal based on the transmission power.

[0125] As an example, the transmit power determined by the terminal device for the path loss measurement signal may be a preset transmit power. For ease of description, this transmit power may be referred to as a first transmit power.

[0126] The preset transmit power may be a value specified by the protocol. For example, the transmit power is a transmit power determined according to the power class used by the terminal device. For another example, the transmit power is equal to the maximum transmit power allowed by the power class used by the terminal device. Alternatively, the preset transmit power may be a value indicated by the network device to the terminal device, such as a value configured via RRC configuration information.

[0127] As another example, the transmit power determined by the terminal device for the path loss measurement signal may be calculated based on the path loss value corresponding to the path loss measurement signal. Each path loss measurement signal may correspond to a path loss value, and the path loss value corresponding to the path loss measurement signal may be the path loss value previously measured and calculated by the network device for the path loss measurement signal sent by the terminal and indicated to the terminal device. For example, the terminal device previously sent the path loss measurement signal to the network device, and the network device determined the path loss value corresponding to the path loss measurement signal and indicated it to the terminal device.

[0128] In this example, after the terminal device calculates and determines the transmit power of the path loss measurement signal, it can report the transmit power to the network device so that the network device knows the transmit power used by the path loss measurement signal and can then calculate the path loss value of the path loss measurement signal.

[0129] As an example, the terminal device may report the transmit power of the path loss measurement signal through UCI (uplink control information) or MAC-CE signaling.

[0130] For a path loss measurement signal, a terminal device can determine the method for determining the transmit power of the path loss measurement signal based on conditions. For example, when the first condition is met, the transmit power of the path loss measurement signal is determined based on the path loss value corresponding to the path loss measurement signal. When the first condition is not met, the transmit power of the path loss measurement signal is a preset transmit power.

[0131] The first condition may be one or more of the following: the terminal device has determined the path loss value corresponding to the path loss measurement signal; the first path loss indication information has been received by the terminal device; the first path loss indication information has taken effect; the terminal device has received path loss indication information indicating the path loss value corresponding to the path loss measurement signal; the terminal device has received path loss indication information indicating the path loss value corresponding to the path loss measurement signal within a certain period of time; and the timer corresponding to the path loss value of the path loss measurement signal has not timed out. The first path loss indication information mentioned above refers to the first path loss indication information after the initial RRC configuration is completed.

[0132] The terminal device can maintain a timer. Each time it receives a path loss value indicated by a path loss measurement signal from the network device, the timer is reset to zero, restarting the timer. If the timer expires, for example, if no path loss value is received from the network device after a period of time, the path loss value corresponding to the path loss measurement resource becomes invalid and cannot be used for uplink transmission, that is, cannot be used to calculate the transmit power of the uplink signal.

[0133] Optionally, one timer may be maintained for each path loss measurement signal, or a unified timer may be maintained for all path loss measurement signals.

[0134] S330: The network device calculates a path loss value of the path loss measurement signal.

[0135] As an example, the path loss measurement signal corresponds to the path loss measurement resource in a one-to-one manner. Therefore, the path loss value of the path loss measurement signal can be referred to as the path loss value corresponding to the path loss measurement resource.

[0136] As an example, after receiving a path loss measurement signal, a network device divides the transmit power of the path loss measurement signal by the receive power of the path loss measurement signal to obtain a path loss value for the path loss measurement signal. The path loss value indicates how many times the receive power of the path loss measurement signal has attenuated compared to the transmit power. In this example, the transmit power and receive power of the path loss measurement signal can be expressed in milliwatts (mW).

[0137] As another example, the network device may subtract the received power of the path loss measurement signal from the transmitted power of the path loss measurement signal to obtain a path loss value for the path loss measurement signal. The path loss value may indicate how many dB the received power of the path loss measurement signal is attenuated compared to the transmitted power. In this example, the transmitted power and received power of the path loss measurement signal may be expressed in dBm.

[0138] For example, if the transmission power of the path loss measurement signal is 40 dBm and the reception power of the path loss measurement signal is -40 dBm, then the path loss value is 40-(-40)=80 dBm.

[0139] S340: The network device sends path loss indication information to the terminal device. Correspondingly, the terminal device receives the path loss indication information.

[0140] As an example, the path loss indication information indicates the path loss value of the path loss measurement signal sent by the terminal device in S330.

[0141] As an example, the path loss indication information may indicate the path loss values ​​of one or more path loss measurement signals. For example, when the terminal sends multiple path loss measurement signals in S320, the path loss indication information may indicate the path loss value of each path loss measurement signal in all or part of the multiple path loss measurement signals.

[0142] In some possible implementations, the path loss indication information may be carried in RRC signaling, MAC-CE signaling, or downlink control information (DCI) signaling.

[0143] In some possible implementations, the path loss indication information includes information corresponding to one or more path loss measurement signals, such as an index of each of the one or more path loss measurement signals and a path loss value of each path loss measurement signal. The index of the path loss measurement signal may be an index of a path loss measurement resource corresponding to the path loss measurement signal.

[0144] In some possible implementations, the path loss value corresponding to each path loss measurement signal can be an absolute value or a relative value. An absolute value refers to the path loss value directly used by the terminal device. A relative value refers to the change in the path loss value.

[0145] For example, if a path loss measurement signal previously had a path loss value of 80dBm and the network device detects that the value has changed to 85dBm, the network device will notify the terminal device of the change of 5dBm. The terminal device then uses this change to update the path loss value of the path loss measurement signal to 85dBm. The 5dBm value is a relative value.

[0146] In some possible implementations, the path loss values ​​of multiple path loss measurement signals may be quantized using a differential method. For example, one of the multiple path loss measurement signals may serve as a reference path loss measurement signal. Its path loss value, serving as the reference path loss value, is directly indicated to the network device. For each of the other path loss measurement signals, the network device indicates the difference between the path loss value of each other path loss measurement signal and the path loss value of the reference path loss measurement signal.

[0147] As an example, the path loss values ​​corresponding to the two path loss measurement signals are x dBm and y dBm, respectively. The path loss value x dBm of the reference path loss measurement signal is directly indicated. For the other path loss measurement signal, the network device indicates the difference between the path loss measurement signal and the path loss value of the reference path loss measurement signal, that is, (xy)dBm or (yx)dBm.

[0148] In some possible implementations, the reference path loss measurement signal may be the first or last of multiple path loss measurement signals, or may be the path loss measurement signal corresponding to the first or last path loss measurement resource among one or more path loss measurement resources, or may be the path loss measurement signal corresponding to the path loss measurement resource with the largest or smallest index.

[0149] Through the method of this embodiment, a terminal device can determine the path loss value of an uplink signal between a network device having only uplink receiving functionality and the terminal device. The method of this embodiment is improved in that the terminal device transmits a path loss measurement signal, and the network device measures and indicates the path loss value of the path loss measurement signal, so that the terminal device can determine the path loss value of an uplink signal between the network device having only uplink receiving functionality and the terminal device.

[0150] As an example of an embodiment of the present application, the configuration information in S310 may include parameters related to one or more first resources, where the first resource is an uplink path loss measurement resource, and each of the one or more first resources corresponds to a first signal. Since the first resource is a path loss measurement resource, the first signal corresponding to the first resource may be referred to as an uplink path loss measurement signal.

[0151] As an example, the first resource may be an SRS resource.

[0152] As an example, the relevant parameters of the first resource include a first parameter, and the first parameter is used to indicate that the first resource is an uplink path loss measurement resource.

[0153] As an example, the first parameter is a type parameter, which is used to indicate the type of the first resource. When the type indicated by the first parameter is the first type, it indicates that the first resource is a path loss measurement resource.

[0154] In S320, the terminal device sends a first signal corresponding to each first resource in at least one first resource in the one or more first resources in the configuration information.

[0155] As an example, before the terminal sends the first signal corresponding to the one or more first resources, the terminal further determines the transmission power of the first signal.

[0156] As an example, the transmit power of the first signal is the first transmit power configured by the configuration information, or the transmit power determined according to the path loss corresponding to the first resource.

[0157] As an example, when the first condition is met, the transmission power of the first signal is the first transmission power; when the first condition is not met, the transmission power of the first signal is the transmission power determined by the path loss value corresponding to the first resource.

[0158] In S330, the network device calculates the path loss value of the first signal corresponding to each first resource of at least one first resource among the one or more first resources. For the sake of simplicity, the path loss value of the first signal corresponding to the first resource is referred to as the path loss value corresponding to the first resource.

[0159] It can be understood that the at least one first resource may be all or part of the one or more first resources.

[0160] In S340, the path loss indication information indicates a path loss value corresponding to each first resource in the at least one first resource. The path loss indication information may be referred to as first indication information.

[0161] As an example, the first indication information includes an index of each first resource in the at least one first resource and path loss information corresponding to each first resource.

[0162] As an example, for a first resource with the largest or smallest path loss value among the at least one first resource, the first indication information includes the path loss value of the first resource; for any other first resource among the at least one first resource, the first indication information includes the difference between the path loss value of any other first resource and the path loss value of the first resource.

[0163] Figure 4 is a schematic flow chart of a communication method provided in another embodiment of the present application. As shown in Figure 4 , the communication method may include S410 to S440.

[0164] S410: The network device sends configuration information to the terminal device. Correspondingly, the terminal device receives the configuration information from the network device.

[0165] This step may refer to S310 and will not be described again here.

[0166] S420: The terminal device sends a path loss measurement signal, and the network device receives the path loss measurement signal accordingly.

[0167] This step may refer to S320 and will not be further described here. The difference may include: when the terminal device determines the transmit power of the path loss measurement signal, the path loss value corresponding to the path loss measurement signal in the relevant content of "calculated based on the path loss value corresponding to the path loss measurement signal" may be replaced with the receive power corresponding to the path loss measurement signal.

[0168] S430: The network device sends receiving power indication information to the terminal device. Correspondingly, the terminal device receives the receiving power indication information. The receiving power indication information indicates the receiving power of the path loss measurement signal sent by the terminal device to the network device.

[0169] As an example, the received power indication information may indicate the received power of one or more path loss measurement signals. For example, when the terminal sends multiple path loss measurement signals in S420, the received power indication information may indicate the received power of each path loss measurement signal in all or part of the multiple path loss measurement signals.

[0170] In some possible implementations, the received power indication information may be carried in RRC signaling, MAC-CE signaling, or DCI signaling.

[0171] In some possible implementations, the received power indication information includes information corresponding to one or more path loss measurement signals, such as an index of each of the one or more path loss measurement signals and the received power of each path loss measurement signal. The index of the path loss measurement signal may be an index of a path loss measurement resource corresponding to the path loss measurement signal.

[0172] In some possible implementations, the received power corresponding to each path loss measurement signal can be an absolute value or a relative value. An absolute value refers to the value directly used by the network device. A relative value refers to the change in received power.

[0173] For example, if the received power of a path loss measurement signal was previously 80 dBm and the network device detects that the received power has changed to 85 dBm, the network device will notify the terminal device of the change of 5 dBm. The terminal device then uses this change to update the received power of the path loss measurement signal to 85 dBm. The 5 dBm is a relative value.

[0174] In some possible implementations, the received powers of multiple path loss measurement signals may be quantized using a differential method. For example, one of the multiple path loss measurement signals may serve as a reference path loss measurement signal. The received power of the reference path loss measurement signal is directly indicated to the network device as the reference received power. For each of the other path loss measurement signals, the network device indicates the difference between the received power of each other path loss measurement signal and the received power of the reference path loss measurement signal.

[0175] As an example, the received powers corresponding to two path loss measurement signals are x dBm and y dBm, respectively. The received power x dBm of the reference path loss measurement signal is directly indicated. For the other path loss measurement signal, the network device indicates the difference between the received power of the path loss measurement signal and the reference path loss measurement signal, that is, (xy)dBm or (yx)dBm.

[0176] In some possible implementations, the reference path loss measurement signal may be the first or last of multiple path loss measurement signals, or may be the path loss measurement signal corresponding to the first or last path loss measurement resource among one or more path loss measurement resources, or may be the path loss measurement signal corresponding to the path loss measurement resource with the largest or smallest index.

[0177] S440: The terminal device calculates the path loss value of the path loss measurement signal.

[0178] This step may refer to the relevant content of the network device calculating the path loss measurement signal in S330, which will not be repeated here.

[0179] Through the method of this embodiment, a terminal device can determine the path loss value between a network device that only has an uplink receiving function and the terminal device. This embodiment is improved in that the terminal device transmits a path loss measurement signal, the network device measures and indicates the received power of the path loss measurement signal, and the terminal device can determine the path loss value between the network device that only has an uplink receiving function and the terminal device based on the received power.

[0180] As an example of an embodiment of the present application, the configuration information in S410 includes parameters related to one or more first resources, where the first resource is an uplink path loss measurement resource. When each of the one or more first resources corresponds to a first signal, the received power indication information in S340 indicates the received power corresponding to each of the at least one first resource. The received power indication information may also be referred to as first indication information.

[0181] As an example, the first indication information includes an index of each first resource in the at least one first resource and receiving power information corresponding to each first resource.

[0182] As an example, for a first resource with the largest or smallest receiving power among the at least one first resource, the first indication information includes the receiving power of the one first resource; for any other first resource among the at least one first resource, the first indication information includes the difference between the receiving power of any other first resource and the receiving power of the one first resource.

[0183] FIG5 is a schematic diagram of the structure of a communication device according to an embodiment of the present application. As shown in FIG5 , the device 500 may include a processing module 501 and a communication module 502 .

[0184] As a first example, the apparatus 500 can be used to implement the communication method implemented by a terminal device in any of the embodiments shown in Figures 3 and 4. For example, the processing module 501 is used to implement the processing-related steps performed by the terminal device in any of the embodiments shown in Figures 3 and 4, and the communication module 502 is used to implement the sending and / or receiving steps performed by the terminal device in any of the embodiments shown in Figures 3 and 4.

[0185] As a second example, the apparatus 500 can be used to implement the communication method implemented by a network device in any of the embodiments shown in Figures 3 and 4. For example, the processing module 501 is used to implement the processing-related steps performed by the network device in any of the embodiments shown in Figures 3 and 4, and the communication module 502 is used to implement the sending and / or receiving steps performed by the network device in any of the embodiments shown in Figures 3 and 4.

[0186] FIG6 is a schematic diagram of the structure of a communication device provided in another embodiment of the present application. As shown in FIG6 , the device 600 includes a processor 601 and a communication circuit 602. The processor 601 and the communication circuit 602 are coupled to each other. It is understood that the communication circuit 602 can be a transceiver or an input / output interface. Optionally, the device 600 may further include a memory 603 for storing instructions executed by the processor 601 or storing input data required by the processor 601 to run the instructions or storing data generated after the processor 601 runs the instructions. It is understood that the memory 603 can be located outside the processor 601, or inside the processor 601.

[0187] As an example, the processor 601 is used to implement the functions of the processing module 501 , and the communication circuit 602 is used to implement the functions of the communication module 502 .

[0188] Apparatus 600 may be a communications device or a chip used in a communications device. For example, apparatus 600 may be a UE or a chip used in a UE, or a network device or a chip used in a network device. It is understood that when apparatus 600 is a UE or a network device, communication circuit 602 may be a transceiver.

[0189] In some embodiments of the present application, a computer program product is also provided. When the computer program product is run on a processor, it can implement the method implemented by the terminal device in any of the above embodiments, or it can implement the method implemented by the network device in any of the above method embodiments.

[0190] In some embodiments of the present application, a computer-readable storage medium is also provided, which includes computer instructions. When the computer instructions are executed on a processor, the method implemented by the terminal device in any of the above embodiments can be implemented, or the method implemented by the network device in any of the above method embodiments can be implemented.

[0191] In some embodiments of the present application, a communication system is also provided, which can implement the method implemented by the terminal device and the network device in any of the above embodiments.

[0192] It is understood that the processor in the embodiments of the present application can be the following devices or all or part of the circuits in the following devices for processing functions: a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. The general-purpose processor can be a microprocessor or any conventional processor.

[0193] The method steps in the embodiments of the present application can be implemented by hardware or by a processor executing software instructions. The software instructions can be composed of corresponding software modules, and the software modules can be stored in a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an erasable programmable read-only memory, an electrically erasable programmable read-only memory, a register, a hard disk, a mobile hard disk, a CD-ROM or any other form of storage medium well known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be an integral part of the processor. The processor and the storage medium can be located in an ASIC. In addition, the ASIC can be located in a network device or a terminal device. Of course, the processor and the storage medium can also be present in a network device or a terminal device as discrete components.

[0194] In the above embodiments, all or part of the embodiments may be implemented using 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 programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are performed in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user device, or other programmable device. The computer program or instructions may be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another. For example, the computer program or instructions may be transferred from one website, computer, server, or data center to another website, computer, server, or data center via wired or wireless means. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center that integrates one or more available media. The available medium may be a magnetic medium, such as a floppy disk, hard disk, or magnetic tape; an optical medium, such as a digital video disk; or a semiconductor medium, such as a solid-state drive.

[0195] In the various embodiments of the present application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

[0196] It is understood that the various numbers used in the embodiments of this application are merely for ease of description and are not intended to limit the scope of the embodiments of this application. The order of the sequence numbers of the above-mentioned processes does not necessarily imply a specific order of execution; the order of execution of the processes should be determined by their functions and inherent logic.

Claims

1. A communication method, characterized in that: Applied to a terminal device, the method comprises: Receive configuration information, where the configuration information includes relevant parameters of one or more first resources, where the first resource is an uplink path loss measurement resource, and each of the one or more first resources corresponds to a first signal; Sending a first signal corresponding to the one or more first resources; First indication information is received, where the first indication information is used to indicate a path loss value or a receiving power corresponding to at least one first resource.

2. The method according to claim 1, characterized in that The first resource is a sounding reference signal SRS resource.

3. The method according to claim 1 or 2, characterized in that: The related parameters of the first resource include a first parameter, and the first parameter is used to indicate that the first resource is an uplink path loss measurement resource.

4. The method according to claim 3, characterized in that The first parameter is a type parameter, and the type parameter is used to indicate the type of the first resource. When the type indicated by the first parameter is the first type, it means that the first resource is an uplink path loss measurement resource.

5. The method according to claim 1, characterized in that The configuration information is used to configure uplink path loss measurement resources associated with uplink signal resources, and the uplink signal resources include at least one of the following resources: SRS resources, physical uplink control channel PUCCH resources, physical uplink shared channel PUSCH resources, demodulation reference signal DMRS resources, or physical random access channel PRACH resources.

6. The method according to claim 5, characterized in that The uplink signal resource includes an SRS resource. If the configuration information does not configure an uplink path loss measurement resource associated with the SRS resource, the SRS resource is an uplink path loss measurement resource.

7. The method according to claim 1, characterized in that Before sending the first signal corresponding to the one or more first resources, the method further includes: Determine the transmit power of the first signal.

8. The method according to claim 7, characterized in that The transmission power of the first signal is the first transmission power configured by the configuration information, or the transmission power determined according to the path loss corresponding to the first resource.

9. The method according to claim 8, characterized in that When the first condition is met, the transmit power of the first signal is the first transmit power; when the first condition is not met, the transmit power of the first signal is the transmit power determined by the path loss value corresponding to the first resource; The first condition includes one or more of the following conditions: The initial first indication information has been received by the terminal device; The initial first instruction information has taken effect; The terminal device knows the path loss value corresponding to the first resource; The terminal device has received indication information including a path loss value corresponding to the first resource within a period of time in the past; The timer corresponding to the first resource has not timed out, and the timer is a timer used to maintain the path loss value corresponding to the first resource.

10. The method according to claim 1, characterized in that The first indication information includes an index of each first resource in the at least one first resource and path loss information corresponding to each first resource.

11. The method according to claim 10, characterized in that For a first resource having a maximum path loss value or a minimum path loss value among the at least one first resource, the first indication information includes the path loss value of the first resource; For any other first resource among the at least one first resource, the first indication information includes a difference between a path loss value of the any other first resource and a path loss value of the one first resource.

12. The method according to claim 1, characterized in that The first indication information includes an index of each first resource in the at least one first resource, and a receiving power corresponding to each first resource; A path loss value corresponding to the at least one first resource is calculated according to the received power of the at least one first resource.

13. The method according to claim 12, characterized in that For a first resource having the largest received power or the smallest received power among the at least one first resource, the first indication information includes the received power of the first resource; For any other first resource among the at least one first resource, the first indication information includes a difference between a received power of the any other first resource and a received power of the one first resource.

14. A communication method, characterized in that: Applied to a network device, the method comprises: Sending configuration information, where the configuration information includes parameters related to one or more first resources, where the first resource is an uplink path loss measurement resource, and each of the one or more first resources corresponds to a first signal; receiving a first signal corresponding to the one or more first resources; Send first indication information, where the first indication information is used to indicate a path loss value or a receiving power corresponding to at least one first resource.

15. The method according to claim 14, characterized in that The first resource is a sounding reference signal SRS resource.

16. The method according to claim 14 or 15, characterized in that The related parameters of the first resource include a first parameter, and the first parameter is used to indicate that the first resource is an uplink path loss measurement resource.

17. The method according to claim 16, characterized in that The first parameter is a type parameter, and the type parameter is used to indicate the type of the first resource. When the type indicated by the first parameter is the first type, it means that the first resource is an uplink path loss measurement resource.

18. The method according to claim 14, characterized in that The configuration information is used to configure uplink path loss measurement resources associated with uplink signal resources, and the uplink signal resources include at least one of the following resources: SRS resources, physical uplink control channel PUCCH resources, physical uplink shared channel PUSCH resources, demodulation reference signal DMRS resources, or physical random access channel PRACH resources.

19. The method according to claim 18, characterized in that The uplink signal resource includes an SRS resource. If the configuration information does not configure an uplink path loss measurement resource associated with the SRS resource, the SRS resource is an uplink path loss measurement resource.

20. The method according to claim 14, characterized in that Before sending the first indication information, the method further includes: Determine the transmit power of the first signal.

21. The method according to claim 20, characterized in that The transmission power of the first signal is the first transmission power configured by the configuration information, or the transmission power determined according to the path loss corresponding to the first resource.

22. The method according to claim 21, characterized in that When the first condition is met, the transmit power of the first signal is the first transmit power; when the first condition is not met, the transmit power of the first signal is the transmit power determined by the path loss value corresponding to the first resource; The first condition includes one or more of the following conditions: The initial first indication information has been received by the terminal device; The initial first instruction information has taken effect; The terminal device knows the path loss value corresponding to the first resource; The terminal device has received indication information including a path loss value corresponding to the first resource within a period of time in the past; The timer corresponding to the first resource has not timed out, and the timer is a timer used to maintain the path loss value corresponding to the first resource.

23. The method according to claim 14, characterized in that The first indication information includes an index of each first resource in the at least one first resource and path loss information corresponding to each first resource.

24. The method according to claim 23, characterized in that For a first resource having a maximum path loss value or a minimum path loss value among the at least one first resource, the first indication information includes the path loss value of the first resource; For any other first resource among the at least one first resource, the first indication information includes a difference between a path loss value of the any other first resource and a path loss value of the one first resource.

25. The method according to claim 14, characterized in that The first indication information includes an index of each first resource in the at least one first resource, and a receiving power corresponding to each first resource.

26. The method according to claim 25, characterized in that For a first resource having the largest received power or the smallest received power among the at least one first resource, the first indication information includes the received power of the first resource; For any other first resource among the at least one first resource, the first indication information includes a difference between a received power of the any other first resource and a received power of the one first resource.

27. A communication device, characterized in that: The method comprises a functional module for implementing the method according to any one of claims 1 to 26.

28. A communication device, characterized in that: include: Memory and processor; The memory is used to store program instructions; The processor is configured to execute program instructions in the memory to implement the method according to any one of claims 1 to 26.

29. A communication system, characterized in that: The communication system comprises a terminal device and a network device, the terminal device is used to implement the method according to any one of claims 1 to 13, and the terminal device is used to implement the method according to any one of claims 14 to 26.

30. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a program code for computer execution, wherein the program code includes instructions for implementing the method according to any one of claims 1 to 26.

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