Communication method and related apparatus

Abstract

The present application relates to the technical field of communications, and particularly relates to a communication method and a related apparatus. The method comprises: receiving one or more first RSs; determining a target path loss value on the basis of the one or more first RSs; and determining, on the basis of the target path loss value, whether to send a PD signal, and / or, determining, on the basis of the target path loss value, a target transmission power value of the PD signal. By using the method, the accuracy of proximity detection can be improved.

Description

Communication method and related apparatus

[0001] This application claims priority from the Chinese patent application No. 202411162176.7, filed on August 22, 2024, and entitled "A communication method and related apparatus", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of communication technology, and in particular to a communication method and related apparatus. BACKGROUND

[0003] With the evolution of communication technology, due to the large bandwidth resource of the millimeter wave frequency band, it can well support the enhanced mobile broadband (eMBB) service with large data transmission rate requirement in the fifth generation (5G) mobile communication and future sixth generation (6G) mobile communication, and the application of the millimeter wave frequency band is more and more widespread. In the millimeter wave frequency band, if the power of the signal transmitted by the terminal device is large, and the distance between the human body and the terminal device is close, it will have an impact on the health of the human body. Therefore, the maximum transmit power allowed by the terminal device at different distances between the human body and the terminal device is usually constrained, that is, the maximum permissible exposure (MPE) limit value.

[0004] In existing solutions, a terminal device usually performs proximity detection (PD) to constrain the maximum transmit power allowed by the terminal device. For example, the terminal device senses whether there is an object or a human body around the terminal device through a proximity sensor (PS) for performing a PD operation, thereby achieving transmit power control of the terminal device. Since the PS can perform signal transmission and reception, in order to avoid the impact on uplink communication between the terminal device and a network device when the terminal device performs the proximity detection operation through the PS, the network device usually configures an uplink gap (UL gap) in the time domain for the terminal device. In the uplink gap, the network device does not schedule the terminal device to send uplink data, and only uses the uplink gap to perform proximity detection through the PS. In order to further prevent the terminal device from sending a PD signal in the uplink gap to interfere with the uplink signal sent by other terminal devices, the 3rd generation partnership project (3GPP) standard limits the power of the signal sent by the terminal device in the uplink gap. This limitation results in a low maximum transmit power allowed by the terminal device, thereby resulting in low accuracy of proximity detection. SUMMARY

[0005] To solve the above problems, the present application provides a communication method and related devices, which can improve the power of the PD signal sent by the terminal device, thereby improving the accuracy of proximity detection.

[0006] The present application is described below from multiple aspects. It should be easily understood that the implementation manners of the multiple aspects below can be mutually referred.

[0007] In a first aspect, an embodiment of the present application provides a communication method, applicable to a terminal device or a chip in the terminal device. The method comprises: receiving one or more first reference signals (RSs). Determining a target path loss value according to the one or more first RSs. Determining whether to send a PD signal according to the target path loss value, and / or determining a target transmit power value of the PD signal according to the target path loss value.

[0008] In the embodiments of the present application, the terminal device can determine whether to send the PD signal and / or the transmission power value of the PD signal according to the path loss value measured based on the one or more first RSs. With this scheme, when the terminal device sends the PD signal, the terminal device can control the transmission power value of the PD signal according to the path loss value, so as to improve the signal-to-noise ratio of the PD signal received by the terminal device while ensuring that the interference of the PD signal to the network device is controllable, thereby improving the proximity detection accuracy. When the terminal device determines not to send the PD signal, the terminal device can avoid causing interference to the uplink signal sent by other terminal devices, thereby improving the communication reliability.

[0009] With reference to the first aspect, in a possible implementation manner, the method further includes: receiving first configuration information. Here, the first configuration information is used to configure the first time-frequency resource, and the first time-frequency resource is used to send the PD signal.

[0010] With reference to the first aspect, in a possible implementation manner, the first configuration information includes time domain position information and frequency domain position information of the first time-frequency resource. Here, the time domain position information is used to indicate the time domain start position and the time domain end position of the first time-frequency resource.

[0011] With reference to the first aspect, in a possible implementation manner, the time domain position information of the first time-frequency resource includes period information and time domain position offset information of the first time domain resource. Here, the period information is used to indicate the period length of the first time-frequency resource, and the time domain position offset information is used to indicate the time domain offset or the time domain start position and the time domain end position of the first time-frequency resource in each period.

[0012] In the above implementation, the first time-frequency resource is configured for the terminal device through the first configuration information, so that the terminal device can send the PD signal on the first time-frequency resource, thereby avoiding causing interference to the uplink signal sent by other terminal devices when sending the PD signal, and improving the communication reliability.

[0013] With reference to the first aspect, in a possible implementation manner, the target path loss value is the minimum path loss value among the multiple path loss values determined based on the multiple first RSs.

[0014] With reference to the first aspect, in a possible implementation manner, the one or more first RSs include a path loss reference signal (PL-RS). Here, the PL-RS is used to determine the transmission power value of the uplink signal.

[0015] With reference to the first aspect, in a possible implementation manner, the one or more first RSs comprise a second RS, and the determining the target path loss value according to the one or more first RSs comprises: determining the target path loss value according to the second RS. Here, the second RS is associated with the first time-frequency resource.

[0016] In the implementation manner, since the second RS is associated with the first time-frequency resource, the terminal device can determine whether to send the PD signal and / or the power of the PD signal according to the path loss value measured according to the second RS.

[0017] With reference to the first aspect, in a possible implementation manner, the first configuration information further comprises a first field, and the first field is used to indicate that the second RS is associated with the first time-frequency resource. In this way, the second RS is associated with the first time-frequency resource, which is simple and easy to implement.

[0018] With reference to the first aspect, in a possible implementation manner, an included angle between a beam direction of the first beam and a beam direction of the second beam is less than or equal to a first angle threshold, where the first beam is a receiving beam used to receive the second RS, and the second beam is a transmitting beam used to transmit the PD signal.

[0019] With reference to the first aspect, in a possible implementation manner, a difference between a first beam width of a receiving beam corresponding to the second RS and a second beam width of a transmitting beam corresponding to the PD signal is less than or equal to a first width threshold.

[0020] In the implementation manner, by limiting the beam direction and / or the beam width of the receiving beam corresponding to the second RS and the transmitting beam of the PD signal, the accuracy of the path loss value measured by the terminal device based on the second RS can be further improved.

[0021] With reference to the first aspect, in a possible implementation manner, the determining whether to send the proximity detection (PD) signal according to the target path loss value comprises: in a case where the target path loss value is greater than or equal to a path loss threshold, sending the PD signal.

[0022] With reference to the first aspect, in a possible implementation manner, the method further comprises: in a case where the target path loss value is less than the path loss threshold, not sending the PD signal.

[0023] With reference to the first aspect, in a possible implementation manner, the method further comprises: receiving first indication information. Here, the first indication information is used to indicate the path loss threshold.

[0024] In a possible implementation manner of the first aspect, the target transmission power value of the PD signal is determined according to the target path loss value, including: determining the target transmission power value of the PD signal according to a minimum value of a sum of the target path loss value and the first power threshold value and a first maximum power value. Here, the first maximum power value is a maximum transmission power value of the PD signal allowed on all frequency domain units of the first time-frequency resource.

[0025] In a possible implementation manner of the first aspect, the target transmission power value of the PD signal is determined according to the target path loss value, including: determining the target transmission power value of the PD signal according to a minimum value of a sum of the target path loss value and the first power threshold value and a first maximum power value. Here, the first maximum power value is a maximum transmission power value of the PD signal allowed on all frequency domain units of the first time-frequency resource.

[0026] In the implementation manner, the terminal device directly determines the target transmission power value of the PD signal on all frequency domain units of the first time-frequency resource according to the target path loss and the first power threshold value, which can reduce the data processing amount of the terminal device and is simple and easy to implement.

[0027] In a possible implementation manner of the first aspect, the target transmission power value of the PD signal is determined according to the target path loss value, including: determining a target unit frequency domain power value according to a sum of the target path loss value and the second power threshold value. Here, the target unit frequency domain power value is a transmission power value of the PD signal on a single frequency domain unit of the first time-frequency resource. The target transmission power value of the PD signal is determined according to the target unit frequency domain power value and a quantity of frequency domain units corresponding to the first time-frequency resource.

[0028] In a possible implementation manner of the first aspect, the target transmission power value of the PD signal is determined according to the target path loss value, including: determining a target unit frequency domain power value according to a minimum value of a sum of the target path loss value and the second power threshold value and a second maximum power value. Here, the second maximum power value is a maximum transmission power value of the PD signal allowed on a single frequency domain unit, and the target unit frequency domain power value is a transmission power value of the PD signal on a single frequency domain unit of the first time-frequency resource. The target transmission power value of the PD signal is determined according to the target unit frequency domain power value and a quantity of frequency domain units corresponding to the first time-frequency resource.

[0029] In the implementation manner, the terminal device first determines the target transmission power value of the PD signal on a single frequency domain unit of the first time-frequency resource according to the target path loss and the second power threshold value, and then determines the target transmission power value of the PD signal on all frequency domain units of the first time-frequency resource in combination with the quantity of frequency domain units corresponding to the first time-frequency resource. In this way, the data processing efficiency of the terminal device is improved, and the implementation manner is simple and easy to implement.

[0030] With reference to the first aspect, in a possible implementation manner, the method further includes: receiving second indication information. Here, the second indication information is used to indicate the first power threshold value and / or the second power threshold value.

[0031] With reference to the first aspect, in a possible implementation manner, the method further includes: if it is determined that the target transmission power value is less than a third preset power value, not sending the PD signal.

[0032] In a second aspect, an embodiment of the present application provides a communication method, applicable to a network device or a chip in the network device. The method includes: generating first configuration information. Here, the first configuration information is used to configure a first time-frequency resource, and the first time-frequency resource is used for a terminal device to send a PD signal. The first configuration information is sent.

[0033] With reference to the second aspect, in a possible implementation manner, the first configuration information includes time domain position information and frequency domain position information of the first time-frequency resource. Here, the time domain position information is used to indicate a time domain start position and a time domain end position of the first time-frequency resource.

[0034] With reference to the second aspect, in a possible implementation manner, the time domain position information of the first time-frequency resource includes period information and time domain position offset information of the first time domain resource. Here, the period information is used to indicate a period length of the first time-frequency resource, and the time domain position offset information is used to indicate a time domain offset or a time domain start position and a time domain end position of the first time-frequency resource in each period.

[0035] With reference to the second aspect, in a possible implementation manner, the first configuration information further includes a first field, and the first field is used to indicate that the second RS is associated with the first time-frequency resource.

[0036] With reference to the second aspect, in a possible implementation manner, the first configuration information further includes configuration information of the second RS. Here, the second configuration information is used to configure the second RS, and the second RS is used for the terminal device to determine a target path loss value, the target path loss value is used for the terminal device to determine whether to send a proximity detection PD signal, and / or the target path loss value is used for the terminal device to determine a target transmission power value of the PD signal.

[0037] With reference to the second aspect, in a possible implementation manner, the method further includes: sending first indication information. Here, the first indication information is used to indicate a path loss threshold value.

[0038] With reference to the second aspect, in a possible implementation manner, the method further includes: sending second indication information. Here, the second indication information is used to indicate the first power threshold value and / or the second power threshold value.

[0039] It should be understood that the communication method provided by the second aspect above is used to cooperate with the communication method provided by the first aspect above, and thus the same beneficial effects can be achieved. In order to avoid redundancy, the description will not be repeated.

[0040] It should be understood that the communication method provided by the first aspect above is also applicable to functional components in the terminal device, such as processors, chips, chip systems, circuits, etc. in the terminal device, and the present application does not make specific limitations thereon. Similarly, the communication method provided by the second aspect above is also applicable to functional components in the corresponding device, and thus the description will not be repeated here to avoid redundancy.

[0041] In a third aspect, the present application provides a communication apparatus, which can be the terminal device or a chip in the terminal device mentioned in the first aspect above. The communication apparatus includes modules, units or means corresponding to the above-mentioned method, which can be implemented by hardware, software or by executing corresponding software by hardware. The hardware or software includes one or more modules or units corresponding to the above-mentioned functions.

[0042] In some possible designs, the communication apparatus includes a transceiver unit (which can also be referred to as a transceiver module) and a processing unit (which can also be referred to as a processing module). The transceiver unit is configured to receive one or more first RSs. The processing unit is configured to determine a target path loss value according to the one or more first RSs. The processing unit is further configured to determine whether to send a proximity detection (PD) signal according to the target path loss value, and / or determine a target transmission power value of the PD signal according to the target path loss value.

[0043] In combination with the third aspect, in a possible implementation, the transceiver unit is further configured to receive first configuration information. Here, the first configuration information is used to configure a first time-frequency resource, and the first time-frequency resource is used to send the PD signal.

[0044] In combination with the third aspect, in a possible implementation, the first configuration information includes time domain position information and frequency domain position information of the first time-frequency resource. Here, the time domain position information is used to indicate a time domain start position and a time domain end position of the first time-frequency resource.

[0045] In combination with the third aspect, in a possible implementation, the first configuration information includes period information and time domain position offset information of the first time domain resource. Here, the period information is used to indicate a period length of the first time-frequency resource, and the time domain position offset information is used to indicate a time domain offset or a time domain start position and a time domain end position of the first time-frequency resource in each period.

[0046] In combination with the third aspect, in a possible implementation, the target path loss value is the minimum path loss value among a plurality of path loss values determined according to the plurality of first RSs.

[0047] With reference to the third aspect, in a possible implementation manner, the one or more first RSs comprise a path loss reference signal (PL-RS). Here, the PL-RS is used to determine a transmission power value of the uplink signal.

[0048] With reference to the third aspect, in a possible implementation manner, in a case where the one or more first RSs comprise the second RS, the processing unit is further configured to determine the target path loss value according to the second RS. Here, the second RS is associated with the first time-frequency resource.

[0049] With reference to the third aspect, in a possible implementation manner, the first configuration information further comprises a first field, and the first field is used to indicate that the second RS is associated with the first time-frequency resource.

[0050] With reference to the third aspect, in a possible implementation manner, an included angle between a beam direction of the first beam and a beam direction of the second beam is less than or equal to a first angle threshold. Here, the first beam is a receiving beam used to receive the second RS, and the second beam is a transmitting beam used to transmit the PD signal.

[0051] With reference to the third aspect, in a possible implementation manner, a difference between a beam width of the first beam and a beam width of the second beam is less than or equal to a first width threshold.

[0052] With reference to the third aspect, in a possible implementation manner, the processing unit is further configured to transmit the PD signal in a case where the target path loss value is greater than or equal to a path loss threshold value.

[0053] With reference to the third aspect, in a possible implementation manner, the processing unit is further configured to not transmit the PD signal in a case where the target path loss value is less than the path loss threshold value.

[0054] With reference to the third aspect, in a possible implementation manner, the transceiver is further configured to receive first indication information. Here, the first indication information is used to indicate the path loss threshold value.

[0055] With reference to the third aspect, in a possible implementation manner, the processing unit is further configured to determine a target transmission power value of the PD signal according to a sum of the target path loss value and a first power threshold value.

[0056] With reference to the third aspect, in a possible implementation manner, the processing unit is further configured to determine the target transmission power value of the PD signal according to a minimum value of a sum of the target path loss value and the first power threshold value and a first maximum power value. Here, the first maximum power value is a maximum transmission power value allowed for the PD signal on all frequency domain units of the first time-frequency resource.

[0057] In a possible implementation manner of the third aspect, the processing unit is further configured to determine the target unit frequency domain power value according to a minimum value of the target path loss value and a sum of the second power threshold value. Here, the second maximum power value is a maximum transmission power value allowed for the PD signal on a single frequency domain unit, and the target unit frequency domain power value is a transmission power value of the PD signal on a single frequency domain unit of the first time-frequency resource. The processing unit is further configured to determine the target transmission power value of the PD signal according to the target unit frequency domain power value and the number of frequency domain units corresponding to the first time-frequency resource.

[0058] In a possible implementation manner of the third aspect, the processing unit is further configured to determine the target unit frequency domain power value according to a minimum value of the target path loss value and a sum of the second power threshold value. Here, the second maximum power value is a maximum transmission power value allowed for the PD signal on a single frequency domain unit, and the target unit frequency domain power value is a transmission power value of the PD signal on a single frequency domain unit of the first time-frequency resource. The processing unit is further configured to determine the target transmission power value of the PD signal according to the target unit frequency domain power value and the number of frequency domain units corresponding to the first time-frequency resource.

[0059] In a possible implementation manner of the third aspect, the processing unit is further configured to determine the target transmission power value of the PD signal as a product of the target unit frequency domain power value and the number of frequency domain units corresponding to the first time-frequency resource.

[0060] In a possible implementation manner of the third aspect, the transceiver is further configured to receive second indication information. Here, the second indication information is used to indicate the first power threshold value and / or the second power threshold value.

[0061] In a possible implementation manner of the third aspect, the processing unit is further configured to, if it is determined that the target transmission power value is less than a third preset power value, not to send the PD signal.

[0062] In a fourth aspect, a communication apparatus is provided. The communication apparatus can be the network device of the first aspect. The communication apparatus includes modules, units or means corresponding to the method described above, which can be implemented by hardware, software or by hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to the above-mentioned functions.

[0063] In some possible design, the communication apparatus includes a transceiver (which can also be referred to as a transceiver module) and a processing unit (which can also be referred to as a processing module). The processing unit is configured to generate first configuration information. Here, the first configuration information is used to configure a first time-frequency resource, and the first time-frequency resource is used for a terminal device to send a PD signal. The transceiver is configured to send the first configuration information.

[0064] In a possible implementation manner of the fourth aspect, the first configuration information includes time domain position information and frequency domain position information of the first time-frequency resource. Here, the time domain position information is used to indicate a time domain start position and a time domain end position of the first time-frequency resource.

[0065] In a possible implementation manner of the fourth aspect, the first configuration information includes period information and time domain position offset information of the first time domain resource. Here, the period information is used to indicate a period length of the first time-frequency resource, and the time domain position offset information is used to indicate a time domain offset, or a time domain start position and a time domain end position of the first time-frequency resource in each period.

[0066] In a possible implementation manner of the fourth aspect, the first configuration information further includes a first field, and the first field is used to indicate that the second RS is associated with the first time-frequency resource.

[0067] In a possible implementation manner of the fourth aspect, the first configuration information further includes second configuration information of the second RS. Here, the second configuration information is used to configure the second RS, and the second RS is used by the terminal device to determine a target path loss value, the target path loss value is used by the terminal device to determine whether to send a proximity detection (PD) signal, and / or the target path loss value is used by the terminal device to determine a target transmission power value of the PD signal.

[0068] In a possible implementation manner of the fourth aspect, the transceiver is further configured to send first indication information. Here, the first indication information is used to indicate a path loss threshold value.

[0069] In a possible implementation manner of the fourth aspect, the transceiver is further configured to send second indication information. Here, the second indication information is used to indicate the first power threshold value and / or the second power threshold value.

[0070] In a possible implementation manner of the fifth aspect, the computer program product includes instructions, when the instructions are executed on a computer, the computer executes the method in the first aspect or any possible implementation manner of the first aspect, or executes the method in the second aspect or any possible implementation manner of the second aspect.

[0071] In a possible implementation manner of the sixth aspect, the computer readable storage medium stores a computer program, when the computer program is executed, executes the method in the first aspect or any possible implementation manner of the first aspect, or executes the method in the second aspect or any possible implementation manner of the second aspect.

[0072] In a seventh aspect, the present application provides a communication apparatus, including at least one processor. The at least one processor is configured to implement the method in any one of the preceding aspects or any possible implementation of the method in any one of the preceding aspects. The communication apparatus can be the terminal device in the first aspect, or a device including the terminal device, or a device included in the terminal device, such as a chip; or the communication apparatus can be the network device in the second aspect, or a device including the network device, or a device included in the network device, such as a chip.

[0073] With reference to the seventh aspect, in a possible implementation, the communication apparatus further includes a memory configured to store necessary program instructions and data (i.e., computer programs).

[0074] With reference to the seventh aspect, in a possible implementation, the memory can be coupled with the processor, or can be independent of the processor.

[0075] In an eighth aspect, the present application provides a chip system including at least one processor. The processor is configured to execute computer program instructions to cause a device in which the chip system is installed to perform the method in the first aspect or any possible implementation of the first aspect, or perform the method in the second aspect or any possible implementation of the second aspect.

[0076] With reference to the eighth aspect, in a possible implementation, the chip system further includes an interface circuit. The interface circuit is configured to receive computer program instructions and transmit the computer program instructions to the processor.

[0077] In a ninth aspect, the present application provides a communication apparatus, including a processor and an interface circuit. The interface circuit is configured to receive a signal from another communication apparatus outside the communication apparatus and transmit the signal to the processor, or transmit a signal from the processor to another communication apparatus outside the communication apparatus. The processor is configured to implement the method in any one of the preceding aspects by means of a logic circuit or by executing computer programs or instructions. The communication apparatus can be the terminal device in the first aspect, or a device including the terminal device, or a device included in the terminal device, such as a chip system; or the communication apparatus can be the network device in the second aspect, or a device including the network device, or a device included in the network device.

[0078] In a tenth aspect, the present application provides a communication system including at least one terminal device and one network device. The terminal device is configured to perform the communication method provided in the first aspect or any possible implementation of the first aspect, and the network device is configured to perform the communication method provided in the second aspect or any possible implementation of the second aspect.

[0079] To sum up, the communication method provided in the application can determine whether to send a PD signal and / or the transmission power value of the PD signal according to the path loss value, improve the transmission power of the PD signal, and thus improve the accuracy of proximity detection. BRIEF DESCRIPTION OF DRAWINGS

[0080] FIG. 1 is a structural schematic diagram of a communication system provided in an embodiment of the application;

[0081] FIG. 2 is a flow schematic diagram of a communication method provided in an embodiment of the application;

[0082] FIG. 3 is a schematic diagram of a beam corresponding to a PL-RS provided in an embodiment of the application;

[0083] FIG. 4 is a schematic diagram of a beam corresponding to a second RS provided in an embodiment of the application;

[0084] FIG. 5 is a structural schematic diagram of a communication device provided in an embodiment of the application;

[0085] FIG. 6 is a structural schematic diagram of another communication device provided in an embodiment of the application;

[0086] FIG. 7 is a structural schematic diagram of another communication device provided in an embodiment of the application. DETAILED DESCRIPTION

[0087] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the accompanying drawings provided in the embodiments of the application.

[0088] In the present application, “at least one” means one or more, and “multiple” means two or more. “And / or” describes the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, A and / or B, which can represent the following three cases: A exists alone, A and B exist together, and B exists alone, where A and B can be singular or plural. In the textual description of the present application, the character “ / ” generally represents that the associated objects before and after it are in an “or” relationship; in the formula of the present application, the character “ / ” represents that the associated objects before and after it are in a “division” relationship. “Including at least one of A, B and C” can represent: including A; including B; including C; including A and B; including A and C; including B and C; including A, B and C.

[0089] The technical solutions provided by the embodiments of the present application can be applied to various communication systems, for example: a Long Term Evolution (LTE) system, an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD), a 5th generation (5G) system or a new radio (NR), and in addition, can also be applicable to subsequent evolution systems, such as a 6th generation (6G) communication system and the like.

[0090] The system architecture to which the embodiments of the present application are applied will be introduced below. It should be noted that the system architecture and business scenarios described in the present application are for more clearly illustrating the technical solutions of the present application, and do not constitute a limitation on the technical solutions provided by the present application. It can be known by those skilled in the art that, with the evolution of system architecture and the appearance of new business scenarios, the technical solutions provided by the present application are also applicable to similar technical problems.

[0091] Please refer to FIG. 1, which is a structural schematic diagram of a communication system provided by an embodiment of the present application. It should be understood that FIG. 1 shows a terrestrial communication system to which the technical solutions provided by the present application are applicable. As shown in FIG. 1, the communication system 10 can include a radio access network (RAN) 100 and a core network (CN) 130. The RAN 100 includes at least one RAN node (such as 110a and 110b in FIG. 1) and at least one terminal (such as 120a-120j in FIG. 1). Other RAN nodes, such as wireless relay devices and / or wireless backhaul devices (not shown in FIG. 1), etc., can also be included in the RAN 100. The terminal is connected to the RAN node in a wireless manner. The RAN node is connected to the core network 130 in a wireless or wired manner. The core network device in the core network 130 and the RAN node in the RAN 100 can be different physical devices respectively, or can be the same physical device integrated with the logical functions of the core network and the logical functions of the radio access network.

[0092] The RAN 100 can be a 3rd Generation Partnership Project (3GPP) -related cellular system, e.g., a 4G, 5G mobile communication system, or a future-oriented evolved system. The RAN 100 can also be an open radio access network (O-RAN or ORAN), a cloud radio access network (CRAN), or a wireless fidelity (WiFi) system. The RAN 100 can also be a communication system that combines two or more of the above systems.

[0093] In the communication system shown in FIG. 1, the RAN nodes, which can also be referred to as access network devices, network devices, RAN entities, or access nodes, etc., form part of the communication system to help terminals to access wirelessly. The RAN nodes in the communication system 10 can be nodes of the same type or nodes of different types. In some scenarios, the roles of the RAN nodes and the terminals are relative, for example, the network element 120i in FIG. 1 can be a helicopter or a drone, which can be configured as a mobile base station, and for those terminals 120j that access the RAN 100 through the network element 120i, the network element 120i is a base station. But for the base station 110a, the network element 120i is a terminal. The RAN nodes and the terminals are sometimes both referred to as communication apparatuses, for example, the network elements 110a and 110b in FIG. 1 can be understood as communication apparatuses with base station functions, and the network elements 120a-120j can be understood as communication apparatuses with terminal functions.

[0094] In a possible scenario, the RAN node can be a base station, an evolved NodeB (eNodeB), an access point (AP), a transmission reception point (TRP), a next generation NodeB (gNB), a base station in a future mobile communication system, or an access node in a WiFi system, etc. The RAN node can be a macro base station (such as 110a in FIG. 1), a micro base station or an indoor station (such as 110b in FIG. 1), a relay node or a donor node, or a wireless controller in a CRAN scenario. Optionally, the RAN node can also be a server, a wearable device, a vehicle or a vehicle-mounted device, etc. For example, the access network device in vehicle to everything (V2X) technology can be a road side unit (RSU). All or part of the functions of the RAN node in this application can also be implemented by software functions running on hardware, or by virtualized functions instantiated on a platform (such as a cloud platform). The RAN node can also be provided with a communication module, circuit or chip for performing corresponding communication functions, and program instructions for performing corresponding communication functions. The RAN node in this application can also be a logical node, a logical module or software that can implement all or part of the functions of the RAN node.

[0095] In another possible scenario, multiple RAN nodes cooperate to assist a terminal to implement wireless access, and different RAN nodes respectively implement part of the functions of a base station. For example, the RAN node can be a central unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU), etc. The CU and the DU can be separately arranged, or can be included in the same network element, such as a baseband unit (BBU). The RU can be included in a radio frequency device or a radio frequency unit, such as a remote radio unit (RRU), an active antenna processing unit (AAU), or a remote radio head (RRH).

[0096] In the communication system shown in FIG. 1, a terminal, which can be a device or module with corresponding communication functions, can access the communication system. The terminal can also be referred to as a terminal device, a user equipment (UE), a mobile station, a mobile terminal, etc. The terminal can be widely used in various scenarios, such as device-to-device (D2D) communication, vehicle-to-everything (V2X) communication, machine-type communication (MTC), internet of things (IOT), virtual reality, augmented reality, industrial control, autonomous driving, remote medical treatment, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, etc. The terminal can be a mobile phone, a tablet computer, a computer with wireless transceiver function, a wearable device, a vehicle, a drone, a helicopter, an airplane, a ship, a robot, a mechanical arm, a smart home device, a transport vehicle with wireless communication function, a communication module, etc. Embodiments of the present application do not limit the device form of the terminal. The terminal is usually provided with a communication module, circuit or chip for executing corresponding communication functions. The terminal is also configured with program instructions for executing corresponding communication functions.

[0097] It should be understood that, in combination with the communication system 10 shown in FIG. 1, the scheme provided in the embodiments of the present application can be cooperatively implemented by the RAN node and the terminal in the communication system 10. For ease of understanding, in the embodiments of the present application, network devices and terminal devices will be uniformly taken as examples for description.

[0098] In the embodiments of the present application, the method performed by the network device can also be implemented by functional components inside the network device, such as a chip, a chip system, a processor, a circuit, etc. Similarly, the method performed by the terminal device can also be implemented by functional components inside the terminal device, such as a chip, a chip system, a processor, a circuit, etc. The embodiments of the present application do not limit this.

[0099] It should be understood that there can be multiple terminal devices in the communication system 10. That is, the network device can establish a communication connection with multiple terminal devices. Similarly, there can also be multiple network devices in the communication system 10. That is, a terminal device can simultaneously establish a communication connection with multiple network devices. In the embodiments of the present application, the number of network devices and terminal devices in the communication system 10 is not specifically limited. For ease of understanding, hereinafter, the communication method provided in the present application will be described by taking one network device and one terminal device as examples.

[0100] The existing 3GPP standard limits the power of the terminal sending the PD signal in the uplink interval, which results in a low maximum transmission power allowed for the terminal device, and easily causes low accuracy of the proximity detection. Therefore, the technical problem to be solved by the present application is how to improve the accuracy of the proximity detection.

[0101] In combination with the above, the communication method of the embodiments of the present application is exemplarily introduced below.

[0102] Embodiment One

[0103] Please refer to FIG. 2, which is a flowchart of a communication method provided by an embodiment of the present application. As shown in FIG. 2, the communication method can include the following steps:

[0104] S201, the network device sends one or more first RSs to the terminal device. Correspondingly, the terminal device receives the one or more first RSs.

[0105] In some feasible implementation manners, the network device can generate one or more first RSs and send the one or more first RSs to the terminal device. Correspondingly, the terminal device can receive the one or more first RSs.

[0106] In an optional implementation, the one or more first RSs can include a PL-RS. For example, each of the one or more first RSs can be a PL-RS. It can also be understood that the network device can send one or more PL-RSs to the terminal device. Correspondingly, the terminal device can receive the one or more PL-RSs.

[0107] It should be noted that the PL-RS can be a PL-RS already supported in the 3GPP standard.

[0108] The PL-RS can be used by the terminal device to determine the transmission power value of the uplink signal, or in other words, the power value of the uplink signal sent by the terminal device to the network device.

[0109] The process of determining the transmission power value of the uplink signal by the terminal device according to the PL-RS is exemplarily described as follows. The network device can indicate the transmission power value (e.g. the transmission power per frequency domain unit) of the PL-RS to the terminal device, and send the PL-RS to the terminal device. Further, the terminal device receives the PL-RS and measures the reference signal received power (RSRP) of the PL-RS. Further, the terminal device can determine the path loss value corresponding to the PL-RS according to the transmission power value of the PL-RS and the RSRP. When the terminal device subsequently sends the uplink signal to the network device, the transmission power value of the uplink signal can be determined according to the path loss value, so that the power of the uplink signal received by the network device is within a specific range. Generally, within the range, the network device can better demodulate and decode the uplink signal sent by the terminal device, and the uplink signal of the terminal device will not interfere with the signals sent by other terminal devices to the network device, for example, will not cause the blocking problem of the analog-to-digital converter.

[0110] Optionally, in the embodiments of the present application, the uplink signal can include a physical uplink control channel (PUCCH), a physical uplink shared channel (PUSCH), a sounding reference signal (SRS), etc., and the embodiments of the present application are not limited thereto.

[0111] It should be noted that each of the one or more PL-RSs can correspond to a different beam pair between the network device and the terminal device, or in other words, each PL-RS can correspond to the transmission path of the main energy of the signal between the network device and the terminal device.

[0112] Optionally, when the network device subsequently schedules the terminal device to send the uplink signal using a certain specific beam, the terminal device can be indicated the PL-RS associated with the uplink signal, so that the path loss value measured thereby and the transmission path of the main energy when subsequently sending the uplink signal are corresponding.

[0113] For example, referring to FIG. 3, which is a schematic diagram of beams corresponding to PL-RSs according to an embodiment of the present application. Here, two PL-RSs are taken as an example to illustrate the beams corresponding to the PL-RSs between the network device and the terminal device. Assume that the two PL-RSs include PL-RS0 and PL-RS1. As shown in FIG. 3, there can be two beam pair links (BPLs) between the network device and the terminal device, the first BPL includes a first beam of the network device and a third beam of the terminal device, and the second BPL includes a second beam of the network device and a fourth beam of the terminal device. The network device can send the PL-RS0 through the first beam, and the terminal device can receive the PL-RS0 through the third beam. In addition, the network device can send the PL-RS1 through the second beam, and the terminal device can receive the PL-RS1 through the fourth beam. The first beam and the third beam can cover a direct path between the network device and the terminal device, and the second beam and the fourth beam can cover a reflected path between the network device and the terminal device through a wall.

[0114] In combination with the content shown in FIG. 3, assume that the terminal device can determine a first path loss value according to the reception measurement result of the PL-RS0, and determine a second path loss value according to the reception measurement result of the PL-RS1. If the network device subsequently schedules the terminal device to send a first uplink signal, and assume that the first uplink signal is associated with the first beam or the third beam (or a reference signal corresponding to the first beam), the network device can indicate to the terminal device that the PL-RS associated with the first uplink signal is the PL-RS0. Further, the terminal device can determine a transmission power value of the first uplink signal according to the first path loss value corresponding to the PL-RS0. If the network device subsequently schedules the terminal device to send a second uplink signal, and assume that the second uplink signal is associated with the second beam or the fourth beam (or a reference signal corresponding to the second beam), the network device can indicate to the terminal device that the PL-RS associated with the second uplink signal is the PL-RS1. Further, the terminal device can determine a transmission power value of the second uplink signal according to the second path loss value corresponding to the PL-RS1.

[0115] Optionally, the one or more first RSs can include all the PL-RSs configured by the network device for the terminal device.

[0116] S202, the terminal device determines a target path loss value according to the one or more first RSs.

[0117] In some possible implementation manners, after receiving the one or more first RSs, the terminal device can determine the target path loss value according to the one or more first RSs.

[0118] Optionally, in a case that the terminal device receives one first RS and the first RS is a PL-RS, the terminal device can determine a path loss value corresponding to the PL-RS according to the PL-RS, and determine the path loss value as the target path loss value.

[0119] Exemplarily, the network device can send one first PL-RS (herein assumed as a target first PL-RS) to the terminal device, and can indicate a transmission power value of the target first PL-RS to the terminal device. Accordingly, the terminal device can receive the target first PL-RS and perform measurement to obtain a reference signal received power value of the target first PL-RS. Further, the terminal device can determine a path loss value of the target first PL-RS according to a difference between the transmission power value of the target first PL-RS and the RSRP value. It should be noted that the path loss value can include energy attenuation of the target first PL-RS caused by electromagnetic wave propagation loss, and can also include beam gain when the network device transmits the target first PL-RS and / or beam gain when the terminal device receives the target first PL-RS, etc. Further, the terminal device can determine the path loss value of the target first PL-RS as the target path loss value.

[0120] Optionally, in a case that the terminal device receives multiple first RSs and the multiple first RSs include multiple PL-RSs, the terminal device can determine a path loss value corresponding to each PL-RS according to the multiple PL-RSs, and determine a minimum value of the multiple path loss values as the target path loss value.

[0121] Exemplarily, the network device can send multiple first PL-RSs to the terminal device, and can indicate a transmission power value corresponding to each first PL-RS in the multiple first PL-RSs to the terminal device. In a possible scenario, the transmission power values of the first PL-RSs can be the same or different. Accordingly, the terminal device can receive the multiple first PL-RSs and perform measurement to obtain a RSRP value corresponding to each first PL-RS. Further, the terminal device can determine a path loss value corresponding to each first PL-RS according to a difference between the transmission power value corresponding to each first PL-RS and the RSRP value corresponding to each first PL-RS, and determine a minimum value of the path loss values corresponding to the multiple first PL-RSs as the target path loss value.

[0122] S203, the terminal device determines whether to send a PD signal according to the target path loss value, and / or determines a target transmission power value of the PD signal according to the target path loss value.

[0123] Next, the principle that the terminal device determines whether to send a PD signal according to the target path loss value, and / or determines a target transmission power value of the PD signal according to the target path loss value will be briefly described.

[0124] In a possible scenario, in order to improve the utilization of resources in the network, the terminal device (supposed to be UE1) can send a PD signal on the first time-frequency resource, and the network device can adjust the receiving beam to the direction where the other terminal device (supposed to be UE2) is located, so as to receive the uplink signal sent by UE2. Wherein, UE1 and UE2 can be located in different beam directions of the network device. In this way, on the first time-frequency resource, both the uplink signal (for example, uplink data) transmission between UE2 and the network device and the process of determining the proximity detection result by UE1 through the PD signal can be implemented. However, in order to ensure the uplink transmission performance between UE2 and the network device, it is necessary to ensure that the interference of the PD signal sent by UE1 on the uplink transmission is within a certain threshold range. Therefore, when the terminal device determines the target path loss value according to the PL-RS, if the target path loss value is small, it indicates that the path loss between UE1 and the network device is large, and the interference of the PD signal sent by UE1 on the uplink signal sent by UE2 at the network device can be large, at this time, UE1 should not send the PD signal or send the PD signal with a small power. On the contrary, if the target path loss value is large, it indicates that the interference of the PD signal sent by UE1 on the uplink signal sent by UE2 at the network device can be small, at this time, UE1 can send the PD signal or can send the PD signal with a large power.

[0125] The following exemplary introduces two ways of determining whether to send a PD signal according to a target path loss value.

[0126] In an optional implementation, the terminal device can send a PD signal when it is determined that the target path loss value is greater than or equal to a path loss threshold value. The terminal device can not send a PD signal when it is determined that the target path loss value is less than the path loss threshold value.

[0127] In another optional implementation, the terminal device can send a PD signal when it is determined that the target path loss value is greater than a path loss threshold value. The terminal device can not send a PD signal when it is determined that the target path loss value is less than or equal to the path loss threshold value.

[0128] In the case of determining whether to send a PD signal based on the size relationship between the target path loss value and the path loss threshold value, the target path loss value and the path loss threshold value can be values in the logarithmic domain (for example, in decibels) or can be unitless linear values (for example, represented by the quotient of the transmission signal power in watts and the received signal power in watts).

[0129] Optionally, the path loss threshold value can be configured by the network device or can be agreed by the protocol, and the embodiments of the present application do not limit this.

[0130] In a case where the path loss threshold value is configured by the network device, the network device can send first indication information indicating the path loss threshold value to the terminal device. Accordingly, the terminal device can receive the first indication information and determine the path loss threshold value based on the first indication information.

[0131] Optionally, in a case where the terminal device determines to send the PD signal, the target transmission power value of the PD signal can also be a fixed power value, such as -10 decibel-milliwatts (dBm). The fixed power value can be configured by the network device or agreed by a protocol, and the embodiments of the present application do not limit this.

[0132] The following exemplary describes three ways of determining the target transmission power value of the PD signal according to the target path loss value and the power threshold value.

[0133] In a first way, the terminal device can determine the target transmission power value of the PD signal on all frequency domain units of the first time-frequency resource according to the target path loss value and a first power threshold value. Here, the first power threshold value can be understood as the interference power value that the network device can tolerate when the terminal device sends the PD signal on all frequency domain units of the first time-frequency resource.

[0134] In an optional implementation, the terminal device can determine the target transmission power value of the PD signal according to the target path loss value and the first power threshold value, and in combination with formula (1). Formula (1) is as follows: P1 = aPL min + P thresh1 + C (1)

[0135] Wherein, PL min is the target path loss value, P thresh1 is the first power threshold value, and P1 is the target transmission power value of the PD signal. a is a proportion factor for adjusting the path loss, for example, a ≤ 1, and a can be configured by the network device. C is a constant term or a quantity related to other parameters. It should be noted that when different sequences are used to send the PD signal, the value of C can be different.

[0136] Exemplarily, in a case where a = 1 as described above, P1 = PL min + P thresh1 + C. That is, in this case, the terminal device can determine the target transmission power value of the PD signal according to the sum of the target path loss value, the first power threshold value, and C. Further, if C = 0, the terminal device can determine the target transmission power value of the PD signal as the sum of the target path loss value and the first power threshold value.

[0137] In yet another alternative implementation, the terminal device can determine the target transmission power value of the PD signal as the minimum of the target transmission power value determined according to the above formula (1) and the first maximum power value. Here, the first maximum power value can be understood as the maximum transmission power value allowed for the terminal device when transmitting the PD signal. For example, assuming the first maximum power value is P max , then the target transmission power value of the PD signal satisfies P1 = min (aPL min + P thresh1 + C, P max ).

[0138] Exemplarily, in the case of a = 1 described above, the terminal device can determine the target transmission power value of the PD signal according to the minimum of the sum of the target path loss value, the first power threshold value and C, and the first maximum power value. For example, assuming the first maximum power value is P max , then the target transmission power value of the PD signal satisfies P1 = min (PL min + P thresh12 + C, P max ). Further, if C = 0, the terminal device can determine the target transmission power value of the PD signal as the minimum of the sum of the target path loss value and the first power threshold value, and the first maximum power value, i.e., P1 = min (PL min + P thresh1 , P max ).

[0139] In the embodiments of the present application, the first power threshold value, the first maximum power value and C described above can be configured by the network device, or can be agreed upon by the protocol, and the embodiments of the present application do not limit this.

[0140] Wherein, in the case that the first power threshold value and the first maximum power value are configured by the network device, the network device can configure the first power threshold value and the first maximum power value through the same configuration information. Alternatively, the network device can also configure the first power threshold value and the first maximum power value through two configuration information, and the embodiments of the present application do not limit this.

[0141] It should be understood that the units of the target path loss value, the first power threshold value and C described in the above manner one are all in the logarithmic domain, for example, the units of the target path loss value and C can be decibels (dB), and the units of the first power threshold value and C can be dBm.

[0142] It should be noted that if the units of the target path loss value, the first power threshold value, C and the first maximum power value are all in the unit in the linear domain, corresponding equivalent transformation can be performed. For example, when the target path loss value is a multiple of the attenuation (for example, defined as the transmitted signal power divided by the received signal power, usually a dimensionless value greater than 1), and the units of the first power threshold value and C are watts or milliwatts, the first power threshold value multiplied by the target path loss value can be used to determine the target transmission power value of the PD signal, assuming that the target path loss value is PL min , the first power threshold value is P thresh1 , and C is α, then the target transmission power value of the PD signal P1 = P thresh1 × PL min α × C, or P1 = min(P thresh1 × PL min a × C, P max ).

[0143] In mode two, the terminal device can first determine the target unit frequency domain power value of the PD signal on a single frequency domain unit of the first time-frequency resource according to the target path loss value and the second power threshold value, and further determine the target transmission power value of the PD signal according to the number of frequency domain units of the first time-frequency resource.

[0144] The target unit frequency domain power value is the transmission power value of the PD signal on a single frequency domain unit of the first time-frequency resource. The second power threshold value can be understood as the interference power value that the network device can tolerate when the terminal device transmits the PD signal on a single frequency domain unit. Specifically, the frequency unit can be a subcarrier, a resource block, a subband, etc. in an OFDM system, and the specific implementation of the frequency domain unit is not limited in the present application.

[0145] In an optional implementation, the terminal device can determine the target unit frequency domain power value of the PD signal according to the target path loss value and the second power threshold value, and in combination with formula (2). Formula (2) is as follows: P2 = αPL min + P thresh2 + D (2)

[0146] Wherein, PL min is the target path loss value, P thresh2 is the second power threshold value, and P2 is the target unit frequency domain power value of the PD signal. α is a proportion factor for adjusting the loss, for example, α ≤ 1, which can be configured by the network device. D is a constant term or a quantity related to other parameters. It should be noted that when different sequences are used to transmit the PD signal, the value of D can be different.

[0147] Further, the terminal device can determine the target transmission power value of the PD signal according to the target unit frequency domain power value and the number of frequency domain units corresponding to the first time-frequency resource.

[0148] For example, in the case of α = 1, the terminal device can determine the target unit frequency domain power value according to the sum of the target path loss value, the second power threshold value and D. min + P thresh2 + D. That is, in this case, the terminal device can determine the target unit frequency domain power value according to the sum of the target path loss value, the second power threshold value and D. min + P thresh2 Further, the terminal device can determine the target transmission power value of the PD signal according to the target unit frequency domain power value and the number of frequency domain units corresponding to the first time-frequency resource.

[0149] In another optional embodiment, the terminal device can determine the minimum value between the target unit frequency domain power value determined according to the above formula (2) and the second maximum power value as the target transmission power value of the PD signal. Here, the second maximum power value can be understood as the maximum transmission power value of the PD signal allowed on a single frequency domain unit. For example, assuming that the second maximum power value is Q max , then the target unit frequency domain power value of the PD signal satisfies P2 = min (αPL min + P thresh2 + D, Q max . Further, the terminal device can determine the target transmission power value of the PD signal according to the target unit frequency domain power value and the number of frequency domain units corresponding to the first time-frequency resource.

[0150] For example, in the case of α = 1, the terminal device can determine the target unit frequency domain power value according to the sum of the target path loss value, the second power threshold value and D. min + P thresh2 , Q max . Further, the terminal device can determine the target transmission power value of the PD signal according to the target unit frequency domain power value and the number of frequency domain units corresponding to the first time-frequency resource.

[0151] In the embodiments of the present application, the above-mentioned second power threshold value, second maximum power value and D can be configured by the network device or can be agreed by the protocol, and the embodiments of the present application are not limited thereto.

[0152] In a case that the second power threshold value and the second maximum power value are configured by the network device, the network device can configure the second power threshold value and the second maximum power value through the same configuration information. Alternatively, the network device can also configure the second power threshold value and the second maximum power value through two configuration information respectively, and the embodiments of the present application are not limited in this regard.

[0153] For example, assuming that the target unit frequency domain power value is P2, and the number of frequency domain units corresponding to the first time-frequency resource is n, the target transmission power value P1 of the PD signal is P2+β×10×log 10 (n)+E. Wherein, β is a parameter for adjusting the influence of the number of frequency domain units, and specifically β=1, wherein log 10 represents the logarithm operation with base 10, and E is a constant or a quantity related to other parameters.

[0154] It should be understood that the target unit frequency domain power value, the target path loss value, the second power threshold value and E described in the above-described mode two are all values in the logarithmic domain, and the units thereof can be dB or dBm.

[0155] It should be noted that, if the target unit frequency domain power value, the target path loss value, the second power threshold value and E are all values in the linear domain, corresponding equivalent transformation can be performed. The specific transformation process is similar to the transformation process described in the above-described mode one, and specific reference can be made to the related description in the above-described mode one, which will not be described herein again.

[0156] Optionally, the terminal device can also determine the minimum value between the target transmission power value determined based on the two optional embodiments of the above-described mode two and the first power threshold value as the target transmission power value of the PD signal.

[0157] Mode three, the above-described mode one and mode two can be combined, that is, the terminal device can determine a target transmission power value (for the sake of distinction, the first transmission power value will be used in the following description) according to the implementation provided by mode one, and the terminal device can also determine a target transmission power value (for the sake of distinction, the second transmission power value will be used in the following description) according to the implementation provided by mode two. Further, the terminal device can determine the minimum value between the first transmission power value and the second transmission power value as the target transmission power value of the PD signal.

[0158] Optionally, the first power threshold value and the second power threshold value can be configured by the network device, or can be agreed by the protocol, and the embodiments of the present application are not limited in this regard.

[0159] In a case where the first power threshold value and the second power threshold value are configured by the network device, the network device can send second indication information for indicating the first power threshold value and / or the second power threshold value to the terminal device. Accordingly, the terminal device can receive the second indication information and determine the first power threshold value and / or the second power threshold value based on the second indication information.

[0160] In an optional implementation, after determining to send the PD signal according to the target path loss value and the path loss threshold value, and determining the target transmission power of the PD signal according to the target path loss value and the power threshold value, the terminal device can further determine not to send the PD signal in a case where the target transmission power value is less than a third preset power value. That is, in a case where the terminal device determines to send the PD signal according to the target path loss value, the terminal device can make a second judgment according to the determined target transmission power value and the third preset power value to determine whether to finally send the PD signal.

[0161] The third preset power value can be configured by the network device or agreed by a protocol, and the embodiments of the present application do not limit this.

[0162] In an optional implementation, in a case where the terminal device determines not to send the PD signal, the terminal device can send the PD signal at a power of keeping transmit off (Tx off), that is, always send the PD signal at a lower transmission power value.

[0163] In an optional implementation, in a case where the terminal device determines not to send the PD signal, the terminal device can reduce the maximum transmission power value allowed for sending the uplink signal to the network device. That is, in a case where the terminal device determines not to send the PD signal, since it cannot determine whether there is a person around, the terminal device can reduce the maximum transmission power allowed for sending the uplink signal, and can always determine the power of sending the uplink signal to the network device according to the reduced maximum transmission power allowed for sending the uplink signal. In this way, it can be ensured that the terminal device meets the MPE limit value, that is, the terminal device sends the uplink signal to the network device at a lower transmission power, and the influence of the transmission power of the terminal device on the human body can be avoided.

[0164] In the embodiments of the present application, the terminal device can determine whether to send the PD signal and / or the transmission power value of the PD signal according to the path loss value measured by one or more PL-RS. With this scheme, in a case where the terminal device sends the PD signal, the terminal device can control the transmission power value of the PD signal according to the path loss value, so that the signal-to-noise ratio of the terminal device receiving the PD signal can be improved in a case where the interference of the PD signal to the network device is controllable, and the accuracy of the proximity detection is improved.

[0165] In an optional implementation, the communication method shown in FIG. 2 can further include step S204. It should be understood that step S204 can be performed before step S201.

[0166] S204, the network device sends the first configuration information to the terminal device. Accordingly, the terminal device receives the first configuration information.

[0167] In some possible implementations, if the network device determines that the terminal device needs to perform proximity detection, the network device can generate the first configuration information and send the first configuration information to the terminal device. Here, the first configuration information can be used to configure the first time-frequency resource, which can be used to send a PD signal to perform proximity detection.

[0168] Optionally, the first configuration information can include time domain position information and frequency domain position information of the first time-frequency resource.

[0169] It should be noted that in the embodiments of the present application, the first time-frequency resource can be a periodic resource or a non-periodic resource, and the embodiments of the present application do not limit this.

[0170] In an optional implementation, in the case where the first time-frequency resource is a non-periodic resource, the time domain position information can indicate a time domain start position and a time domain end position of the first time-frequency resource.

[0171] The following exemplary describes two different contents of the time domain position information of the first time-frequency resource.

[0172] Example 1: The time domain position information of the first time-frequency resource can include a time domain start position and a time domain end position of the first time-frequency resource. For example, assuming that the start time corresponding to the 0th frame after synchronization between the terminal device and the network device is 0 milliseconds (ms), and taking the start time 0 ms as a reference time, the time domain start position of the first time-frequency resource can be 1 ms, i.e., the time domain start time is 1 ms different from the reference time, and the time domain end position can be 2 ms, i.e., the time domain end time is 2 ms different from the reference time.

[0173] Example 2: The time domain position information of the first time-frequency resource can include a time domain start position of the first time-frequency resource and a duration of the first time-frequency resource, and further determine the time domain end position of the first time-frequency resource according to the time domain start position and the duration. For example, assuming that the start time corresponding to the 0th frame after synchronization between the terminal device and the network device is 0 ms, and taking the start time 0 ms as a reference time, the time domain start position of the first time-frequency resource can be 1 ms, i.e., the time domain start time is 1 ms different from the reference time, and the duration can be 1 ms.

[0174] Further, after receiving the first time domain position information, the terminal device can determine the time domain position of the first time-frequency resource according to the first time domain position information.

[0175] Optionally, in the case that the first time-frequency resource is aperiodic, the terminal device can determine the time domain start position and the time domain end position of the first time-frequency resource according to the content contained in the first time domain position information in the above example one and example two.

[0176] In combination with the above example one, the terminal device can determine the time domain start position and the time domain end position of the first time-frequency resource according to the content contained in the time domain position information of the first time-frequency resource. For example, the terminal device can determine that the time domain start position of the first time-frequency resource is 1 ms and the time domain end position is 2 ms.

[0177] In combination with the above example two, the terminal device can determine the time domain start position of the first time-frequency resource according to the content contained in the first time domain position information, and can also determine the time domain end position of the first time-frequency resource according to the time domain start position and the duration contained in the first configuration information. For example, the terminal device can determine that the time domain start position of the first time-frequency resource is 1 ms, and can also determine that the time domain end position of the first time-frequency resource is 2 ms according to the time domain start position 1 ms and the duration 1 ms.

[0178] In yet another optional implementation, in the case that the first time-frequency resource is periodic, the time domain position information of the first time-frequency resource can include periodic information of the first time-frequency resource and time domain position offset information. The periodic information can be used to indicate the periodic interval of the first time-frequency resource, and the time domain position offset information can be used to indicate the time domain offset or the time domain start position and the time domain end position of the first time-frequency resource in each period.

[0179] In this case, the following exemplary introduces two different contents contained in the time domain position offset information of the first time-frequency resource.

[0180] Example one, the time domain position offset information of the first time-frequency resource can include the time domain start position offset and the time domain end position offset of the first time-frequency resource in each period. For example, assuming that the start time corresponding to the 0th frame after synchronization between the terminal device and the network device is 0 ms, the time domain start position offset of the first time-frequency resource in each period can be 1 ms, and the time domain end position offset can be 2 ms.

[0181] In Example 2, the time domain position offset information of the first time-frequency resource can include a time domain starting position offset of the first time-frequency resource in each cycle. Optionally, in this case, the time domain position information of the first time-frequency resource can further include a time length of the first time-frequency resource in each cycle. For example, assuming that the starting time corresponding to the 0th frame after synchronization between the terminal device and the network device is 0 ms, the time domain starting position offset of the first time-frequency resource in each cycle can be 1 ms, and the time length of the first time-frequency resource in each cycle can be 1 ms, then according to the above starting position offset and time length, the time domain ending position offset of the first time-frequency resource in each cycle can be determined as 2 ms.

[0182] Further, after the terminal device receives the first time domain position information, the terminal device can determine the time domain position of the first time-frequency resource according to the first time domain position information.

[0183] Optionally, in the case where the first time-frequency resource is a periodic resource, the terminal device can determine the multiple time domain positions corresponding to the first time-frequency resource according to the content included in the first time domain position information in the above Example 1 and Example 2.

[0184] In combination with the above Example 1, the terminal device can determine the multiple time domain positions corresponding to the first time-frequency resource according to the time domain starting position offset and the time domain ending position offset of the first time-frequency resource in each cycle, and in combination with the cycle interval of the first time-frequency resource. For example, assuming that the time domain starting position offset of the first time-frequency resource is 1 ms, the time domain ending position offset is 2 ms, and the cycle interval is 160 ms, then the terminal device can determine the multiple time domain positions of the first time-frequency resource according to the first configuration information, including 1 ms-2 ms, 161 ms-162 ms, 321 ms-322 ms, and so on.

[0185] In combination with the above Example 2, the terminal device can first determine the time domain ending position offset of the first time-frequency resource in each cycle according to the time domain starting position offset of the first time-frequency resource in each cycle and the time length in each cycle, and further determine the multiple time domain positions corresponding to the first time-frequency resource in combination with the cycle interval of the first time-frequency resource. For example, assuming that the time domain starting position offset of the first time-frequency resource is 1 ms, the time length of the first time-frequency resource in each cycle is 1 ms, and the cycle interval is 160 ms, then the terminal device can first determine the time domain ending position offset of the first time-frequency resource in each cycle as 2 ms according to the time domain starting position offset 1 ms and the time length 1 ms, and further determine the multiple time domain positions of the first time-frequency resource in combination with the cycle interval 160 ms of the first time-frequency resource, including 1 ms-2 ms, 161 ms-162 ms, 321 ms-322 ms, and so on.

[0186] In a possible scenario, the first time-frequency resource can be an uplink interval resource.

[0187] Optionally, the first configuration information can further include one or more of the path loss threshold value, the first power threshold value, or the second power threshold value described in step S203. That is, the path loss threshold value, the first power threshold value, or the second power threshold value can not be indicated to the terminal device by the network device through the indication information, but can be configured by the network device, and the embodiments of the present application do not limit this.

[0188] In an optional embodiment, the communication method shown in FIG. 2 can further include step S205. It should be understood that step S205 can be performed before step S201. Optionally, step S205 can be performed before step S204, or can be performed after step S204, and the embodiments of the present application do not limit this. For ease of description, the following describes the case where step S204 is performed before step S205.

[0189] S205, the network device sends configuration information of the one or more first RSs to the terminal device. Correspondingly, the terminal device receives the configuration information of the one or more first RSs.

[0190] In some possible implementations, before sending the one or more first RSs, the network device can generate configuration information of the one or more first RSs, and send the configuration information of the one or more first RSs to the terminal device.

[0191] In the case where each of the one or more first RSs is a PL-RS, before sending the one or more PL-RSs, the network device can generate configuration information (for ease of distinction, referred to as second configuration information below) of the one or more PL-RSs, and send the second configuration information to the terminal device.

[0192] Optionally, the second configuration information can include one or more of time-frequency resource location information, beam information, or transmission power information of the one or more PL-RSs. The time-frequency resource location information of the one or more PL-RSs can be used to indicate time-frequency resources used by each PL-RS in the one or more PL-RSs. The beam information of the one or more PL-RSs can be used to indicate a beam direction and / or a beam width corresponding to each PL-RS between the network device and the terminal device. The transmission power information of the one or more PL-RSs can be used to indicate a transmission power value corresponding to each PL-RS sent by the network device.

[0193] Further, the terminal device can receive second configuration information, and can determine one or more of time-frequency resource location information, beam information, or transmit power information of the one or more PL-RSs based on the second configuration information.

[0194] Embodiment Two

[0195] Please continue to refer to FIG. 2, and the following will introduce another communication method provided by the embodiments of the present application in combination with FIG. 2.

[0196] S201, the network device sends one or more first RSs to the terminal device. Correspondingly, the terminal device receives the one or more first RSs.

[0197] In some possible implementation manners, the network device can generate the one or more first RSs and send the one or more first RSs to the terminal device. Correspondingly, the terminal device can receive the one or more first RSs.

[0198] In an optional implementation manner, the one or more first RSs can include second RSs. For example, each of the one or more first RSs can be a second RS. It can also be understood that the network device can send one or more second RSs to the terminal device. Correspondingly, the terminal device can receive the one or more second RSs.

[0199] It should be noted that the second RS is different from the above-mentioned PL-RS, and can be an RS specially configured by the network device for the terminal device to determine whether to send a PD signal or to determine the transmit power of the PD signal, and is not multiplexed with the PL-RS configured for the terminal device, that is, the second RS is not used by the terminal device to determine the power of the uplink signal sent to the network device.

[0200] Optionally, in the embodiments of the present application, the second RS can be a channel state information reference signal (CSI-RS) or a non-zero power reference signal (NZP-RS), and the embodiments of the present application are not limited thereto.

[0201] As described in the foregoing embodiment one, whether the terminal device transmits the PD signal or the power of the terminal device transmitting the PD signal needs to be determined according to the interference caused by the terminal device transmitting the PD signal to the network device. In the embodiment one, the PL-RS is used to estimate the interference, which can be considered as the worst case interference estimation (i.e. the interference when the receiving beam of the network device is consistent with the direction of the communication with the terminal device on the first time-frequency resource). In the embodiment two, further, if the network device can determine in advance which receiving beam it needs to use on the first time-frequency resource, the interference can be more accurately estimated. For example, the network device can first determine which one or which several other terminal devices (assuming UE2) need to be scheduled for uplink transmission on the first time-frequency resource, and then can determine the receiving beam that should be used to receive the uplink signal of the UE2. In this way, the terminal device (assuming UE1) can more accurately determine the interference value caused by the terminal device transmitting the PD signal on the first time-frequency resource to the network device receiving the uplink signal of the UE2.

[0202] Exemplarily, assuming that the network device determines that the receiving beam it uses on the first time-frequency resource is beam A, the network device can transmit the second RS through the beam A. Correspondingly, the UE1 can determine the path loss value between the UE1 and the network device using the beam A after receiving the second RS, which can reflect the interference caused by the UE1 transmitting the PD signal on the first time-frequency resource to the network device. It needs to be understood that since the beam direction between the UE1 and the network device can not be in the beam direction corresponding to the above-mentioned beam A, the above-mentioned second RS can also not be configured as the PL-RS of the UE1.

[0203] Optionally, the second RS can be multiplexed with the PL-RS configured by the network device to the UE2. In combination with the above-mentioned example, if the network device receives the uplink signal of the UE2 on the first time-frequency resource with the beam A, according to the foregoing description, the network device will configure a PL-RS for the UE2 on other time-frequency resources, which can be used by the UE2 to determine the power of transmitting the uplink signal, and the beam used by the network device to transmit the PL-RS is the beam A or a beam with a beam direction close to the beam direction of the beam A. Therefore, the network device can also configure the PL-RS of the UE2 as the second RS of the UE1, that is, the network device can transmit the same reference signal, which can be used by the UE2 to determine the power of transmitting the uplink signal, and can also be used by the UE1 to determine the possible interference caused by the UE1 transmitting the PD signal on the first time-frequency resource to the network device. In this way, the system does not increase the overhead of the system reference signal.

[0204] That is, the network device can also configure a second RS for UE2, and the beam direction of the sending beam corresponding to the second RS sent by the network device can be directed to UE2. For example, refer to FIG. 4, which is a schematic diagram of a beam corresponding to a second RS according to an embodiment of the present application. As shown in FIG. 4, UE1 and UE2 are located in different beam directions of the network device, and the beam direction of the sending beam corresponding to the second RS can be directed to UE2.

[0205] It can be understood that the second RS can be a reference signal associated with the first time-frequency resource. The first time-frequency resource can be used by the terminal device to send a PD signal to perform proximity detection. It should be understood that the first time-frequency resource herein is the same as the first time-frequency resource described in step S204 of the foregoing embodiment one, and details can be referred to the content described in step S204 of the foregoing embodiment one, which will not be repeated here.

[0206] S202, the terminal device determines a target path loss value according to one or more first RSs.

[0207] In some possible implementation manners, after receiving the one or more first RSs, the terminal device can determine a target path loss value according to the one or more first RSs.

[0208] Optionally, when the terminal device receives one first RS and the first RS is the second RS, the terminal device can determine the path loss value corresponding to the second RS and determine the path loss value as the target path loss value.

[0209] For example, the network device can send a second RS (hereinafter referred to as a target second RS) to the terminal device, and can indicate the transmission power value of the target second RS to the terminal device. Accordingly, the terminal device can receive the target second RS and measure the RSRP of the target second RS. The terminal device can also determine the transmission power value of the target second RS. Further, the terminal device can determine the path loss value of the target second RS according to the difference between the transmission power value and the RSRP value of the target second RS, and determine the path loss value of the target second RS as the target path loss value.

[0210] Optionally, when the terminal device receives multiple first RSs and the multiple first RSs are all the second RSs, the terminal device can determine the path loss value corresponding to each second RS according to the multiple second RSs, and determine the minimum value of the multiple path loss values as the target path loss value.

[0211] Exemplarily, the network device can send multiple second RSs to the terminal device, and can indicate the terminal device with the transmission power values of the second RSs in the multiple second RSs. Accordingly, the terminal device can receive the multiple second RSs and perform measurement to obtain the RSRP values corresponding to the second RSs. The terminal device can further determine the transmission power values corresponding to the second RSs. Further, the terminal device can determine the path loss values corresponding to the second RSs according to the transmission power values corresponding to the second RSs and the RSRP values corresponding to the second RSs, and determine the minimum value in the path loss values corresponding to the second RSs as the target path loss value.

[0212] It should be noted that, in the process of determining the path loss value, the receiving beam used by the terminal device in receiving the second RS should be associated with the transmitting beam corresponding to the terminal device in sending the PD signal on the first time-frequency resource. That is, the transmitting beam used by the terminal device in subsequently sending the PD signal on the first time-frequency resource can be associated with the receiving beam of the corresponding second RS when the terminal device determines the target path loss value.

[0213] Optionally, the beam direction of the first beam and the beam direction of the second beam can be similar or the same. Here, the first beam is a receiving beam for receiving the second RS, and the second beam is a transmitting beam for sending the PD signal. For example, the included angle between the beam direction of the first beam and the beam direction of the second beam can be less than or equal to a first angle threshold. For another example, the included angle between the beam direction of the first beam and the beam direction of the second beam can be 0.

[0214] Optionally, the beam width of the first beam and the beam width of the second beam can be similar or equal. For example, the difference between the beam width of the first beam and the beam width of the second beam can be less than or equal to a first width threshold. For another example, the difference between the beam width of the first beam and the beam width of the second beam can be 0.

[0215] Optionally, the first angle threshold and the first width threshold can be an empirical value, and can be configured by the network device or can be agreed by protocol, and the embodiments of the present application are not limited thereto.

[0216] In the above implementation, by limiting the beam direction and / or the beam width of the receiving beam of the second RS and the transmitting beam of the PD signal, the accuracy of the path loss value measured by the terminal device based on the second RS can be further improved, and the accuracy of the proximity detection is further improved.

[0217] S203, the terminal device determines whether to send the PD signal according to the target path loss value, and / or determines the target transmission power value of the PD signal according to the target path loss value.

[0218] In some possible implementation manners, after determining the target path loss value, the terminal device can determine whether to send the PD signal according to the target path loss value, and / or determine the target transmission power value of the PD signal according to the target path loss value.

[0219] It should be understood that the specific process in which the terminal device determines whether to send the PD signal according to the target path loss value, and / or determines the target transmission power value of the PD signal according to the target path loss value, is similar to the process described in step S203 of the foregoing embodiment one, and the specific process can be referred to the content of step S203 of the foregoing embodiment one, which will not be described herein again.

[0220] S204, the network device sends first configuration information to the terminal device. Accordingly, the terminal device receives the first configuration information.

[0221] In some possible implementation manners, if the network device determines that the terminal device needs to perform the proximity detection, the network device can generate the first configuration information and send the first configuration information to the terminal device. Here, the first configuration information can be used to configure the first time-frequency resource, and the first time-frequency resource can be used to send the PD signal to perform the proximity detection.

[0222] Here, the process in which the network device sends the first configuration information to the terminal device is similar to the process described in step S204 of the foregoing embodiment one, and the specific process can be referred to the specific process described in step S204 of the foregoing embodiment one, which will not be described herein again.

[0223] Optionally, in the case where the one or more first RSs include the second RS, the network device can indicate, by using the first configuration information, that the second RS is associated with the first time-frequency resource. The following exemplary introduces two ways of indicating, by using the first configuration information, that the second RS is associated with the first time-frequency resource.

[0224] In the first way, the first configuration information can further include a first field, and the first field can be used to indicate that the second RS is associated with the first time-frequency resource. Specifically, the first field can include the identification information of the second RS.

[0225] Optionally, after receiving the first configuration information, the terminal device can determine the second RS according to the identification information of the second RS included in the first field, and can determine the second RS as the RS associated with the first time-frequency resource, and then can determine whether to send the PD signal or the power of the PD signal according to the path loss value determined by using the second RS.

[0226] In the second way, the first configuration information can further include the configuration information of the second RS. The configuration information of the second RS includes the time-frequency resource corresponding to the second RS, and the configuration information of the second RS can be used by the terminal device to determine that the second RS is associated with the first time-frequency resource.

[0227] Optionally, after receiving the first configuration information, the terminal device can determine the second RS according to the time-frequency resource corresponding to the second RS contained in the first configuration information, and determine the second RS as the RS associated with the first time-frequency resource. Subsequently, the terminal device can determine whether to send the PD signal or the power of the PD signal according to the path loss value determined by the second RS.

[0228] S205, the network device sends the configuration information of the one or more first RSs to the terminal device. Correspondingly, the terminal device receives the configuration information of the one or more first RSs.

[0229] In some possible implementation manners, before sending the one or more first RSs, the network device can generate the configuration information of the one or more first RSs, and send the configuration information of the one or more first RSs to the terminal device.

[0230] In the case where each of the one or more first RSs is a second RS, before sending the one or more second RSs, the network device can generate the configuration information (for the sake of distinction, referred to as third configuration information below) of the one or more second RSs, and send the third configuration information to the terminal device.

[0231] Optionally, the third configuration information can include one or more of time-frequency resource position information, beam information, or transmission power information of the one or more second RSs. The time-frequency resource position information of the one or more second RSs can be used to indicate the time-frequency resource used by each second RS in the one or more second RSs. The beam information of the one or more second RSs can be used to indicate the beam direction and / or beam width corresponding to each second RS between the network device and the terminal device. The transmission power information of the one or more second RSs can be used to indicate the transmission power value corresponding to each second RS sent by the network device.

[0232] Further, the terminal device can receive the third configuration information, and can determine one or more of the time-frequency resource position information, the beam information, or the transmission power information of the one or more second RSs based on the third configuration information.

[0233] It should be noted that in this scenario, the network device can also send the above-mentioned third configuration information to other terminal devices in addition to the terminal device, to configure the second RS. The second RS can be used by the other terminal devices to determine the power value of the uplink signal sent to the network device.

[0234] It should be understood that in possible scenarios, the implementation manners provided in the above-mentioned embodiment one and embodiment two can be combined with each other to implement the communication method provided in the present application.

[0235] The communication method provided by the embodiments of the present application is described in detail above in combination with FIG. 2 to FIG. 4. The communication apparatus provided by the embodiments of the present application will be described in detail below in combination with FIG. 5 and FIG. 6. It should be understood that the description of the embodiments of the communication apparatus corresponds to the description of the embodiments of the communication method, and thus the parts not described in detail can be referred to the foregoing method embodiments.

[0236] Referring to FIG. 5, FIG. 5 is a structural schematic diagram of a communication apparatus provided by an embodiment of the present application. As shown in FIG. 5, the communication apparatus 500 can include a transceiver unit 501 and a processing unit 502.

[0237] In some possible implementation manners, the communication apparatus 500 can correspond to the terminal device or a component (such as a circuit, a chip or a chip system) configured in the terminal device.

[0238] In a specific implementation, the transceiver unit 501 is configured to receive one or more first RSs. The processing unit 502 is configured to determine a target path loss value according to the one or more first RSs. The processing unit 502 is further configured to determine whether to send a proximity detection (PD) signal according to the target path loss value, and / or determine a target transmission power value of the PD signal according to the target path loss value.

[0239] In a possible implementation manner, the transceiver unit 501 is further configured to receive first configuration information. Here, the first configuration information is used to configure a first time-frequency resource, and the first time-frequency resource is used to send the PD signal.

[0240] In a possible implementation manner, the first configuration information includes time domain position information of the first time-frequency resource. Here, the time domain position information is used to indicate a time domain start position and a time domain end position of the first time-frequency resource.

[0241] In a possible implementation manner, the first configuration information includes period information and time domain position offset information of the first time-frequency resource. Here, the period information is used to indicate a period length of the first time-frequency resource, and the time domain position offset information is used to indicate a time domain start position and a time domain end position of the first time-frequency resource in each period.

[0242] In a possible implementation manner, the target path loss value is a minimum path loss value in a plurality of path loss values determined according to the plurality of first RSs.

[0243] In a possible implementation manner, the one or more first RSs include a path loss reference signal (PL-RS). Here, the PL-RS is used to determine a transmission power value of an uplink signal.

[0244] In a possible implementation, in a case that the one or more first RSs comprise a second RS, the processing unit is further configured to determine the target path loss value according to the second RS. Here, the second RS is associated with the first time-frequency resource.

[0245] In a possible implementation, the first configuration information further comprises a first field, and the first field is used to indicate that the second RS is associated with the first time-frequency resource.

[0246] In a possible implementation, an included angle between a beam direction of the first beam and a beam direction of the second beam is less than or equal to a first angle threshold. Here, the first beam is a receiving beam used to receive the second RS, and the second beam is a transmitting beam used to transmit the PD signal.

[0247] In a possible implementation, a difference between a beam width of the first beam and a beam width of the second beam is less than or equal to a first width threshold.

[0248] In a possible implementation, the processing unit 502 is further configured to transmit the PD signal in a case that the target path loss value is greater than or equal to a path loss threshold.

[0249] In a possible implementation, the processing unit 502 is further configured to not transmit the PD signal in a case that the target path loss value is less than the path loss threshold.

[0250] In a possible implementation, the transceiver 501 is further configured to receive first indication information. Here, the first indication information is used to indicate the path loss threshold.

[0251] In a possible implementation, the processing unit 502 is further configured to determine a target transmit power value of the PD signal according to a sum of the target path loss value and a first power threshold.

[0252] In a possible implementation, the processing unit 502 is further configured to determine the target transmit power value of the PD signal according to a minimum value of a sum of the target path loss value and the first power threshold and a first maximum power value. Here, the first maximum power value is a maximum transmit power value of the PD signal allowed on all frequency domain units of the first time-frequency resource.

[0253] In a possible implementation, the processing unit 502 is further configured to determine a target unit frequency domain power value according to a sum of the target path loss value and a second power threshold. Here, the target unit frequency domain power value is a transmit power value of the PD signal on a single frequency domain unit of the first time-frequency resource. The processing unit 502 is further configured to determine the target transmit power value of the PD signal according to the target unit frequency domain power value and a quantity of frequency domain units corresponding to the first time-frequency resource.

[0254] In a possible implementation, the processing unit 502 is further configured to determine the target unit frequency domain power value according to a minimum value of a sum of the target path loss value and the second power threshold value and a second maximum power value. Here, the second maximum power value is a maximum transmission power value allowed for the PD signal on a single frequency domain unit, and the target unit frequency domain power value is a transmission power value of the PD signal on a single frequency domain unit of the first time-frequency resource. The processing unit 502 is further configured to determine the target transmission power value of the PD signal according to the target unit frequency domain power value and a quantity of frequency domain units corresponding to the first time-frequency resource.

[0255] In a possible implementation, the processing unit 502 is further configured to determine the target transmission power value of the PD signal as a product of the target unit frequency domain power value and the quantity of frequency domain units corresponding to the first time-frequency resource.

[0256] In a possible implementation, the transceiver 501 is further configured to receive second indication information. Here, the second indication information is used to indicate the first power threshold value and / or the second power threshold value.

[0257] In a possible implementation, the processing unit 502 is further configured to, if it is determined that the target transmission power value is less than a third preset power value, not transmit the PD signal.

[0258] In some possible implementations, the communication apparatus 500 can correspond to the network device or a component (such as a circuit, a chip, or a chip system) configured in the network device.

[0259] In specific implementations, the processing unit 502 is configured to generate first configuration information. Here, the first configuration information is used to configure the first time-frequency resource, and the first time-frequency resource is used for the terminal device to transmit the PD signal. The transceiver 501 is configured to transmit the first configuration information.

[0260] In a possible implementation, the first configuration information includes time domain location information and frequency domain location information of the first time-frequency resource. Here, the time domain location information is used to indicate a time domain start position and a time domain end position of the first time-frequency resource.

[0261] In a possible implementation, the first configuration information includes period information and time domain location offset information of the first time domain resource. Here, the period information is used to indicate a period length of the first time-frequency resource, and the time domain location offset information is used to indicate a time domain offset or a time domain start position and a time domain end position of the first time-frequency resource in each period.

[0262] In a possible implementation, the first configuration information further includes a first field, and the first field is used to indicate that the second RS is associated with the first time-frequency resource.

[0263] In a possible implementation, the first configuration information further includes configuration information of a second RS. Here, the second configuration information is used for configuring the second RS, and the second RS is used by the terminal device to determine a target path loss value, the target path loss value is used by the terminal device to determine whether to send a proximity detection (PD) signal, and / or the target path loss value is used by the terminal device to determine a target transmission power value of the PD signal. The transceiver 501 is further configured to send the second configuration information.

[0264] In a possible implementation, the transceiver 501 is further configured to send first indication information. Here, the first indication information is used to indicate the path loss threshold value.

[0265] In a possible implementation, the transceiver 501 is further configured to send second indication information. Here, the second indication information is used to indicate the first power threshold value and / or the second power threshold value.

[0266] Referring to FIG. 6, FIG. 6 is a structural schematic diagram of another communication apparatus provided in the present application. The communication apparatus 600 can be used to implement operations performed by the terminal device or the network device in the above-described embodiments, or the communication apparatus 600 can be the terminal device or the network device described above. The communication apparatus 600 includes a processor 601, a memory 602, and a bus system 603.

[0267] The memory 602 includes, but is not limited to, a random access memory (RAM), a read-only memory (ROM), an erasable PROM (EPROM), or a compact disc read-only memory (CD-ROM). The memory 602 is configured to store relevant instructions and data. The memory 602 stores the following elements, executable modules or data structures, or a subset of them, or an extended set of them:

[0268] Operation instructions: include various operation instructions, used to implement various operations.

[0269] Operating system: includes various system programs, used to implement various basic services and process hardware-based tasks.

[0270] Only one memory is shown in FIG. 6, of course, the memory can also be set to multiple according to the needs.

[0271] In a possible implementation, the communication apparatus 600 can only include the processor 601 and the bus system 603, that is, does not include the memory 602.

[0272] The communication apparatus 600 can further include a transceiver 604. The transceiver 604 can be a communication module, a transceiver circuit. In the embodiments of the present application, the transceiver 604 is configured to perform the receiving and transmitting operations of the messages involved in the embodiments described above.

[0273] The processor 601 can be at least one, specifically can be a controller, a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a transistor logic device, a hardware component or any combination thereof. The processor 601 can also be a combination of components that implement computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like.

[0274] In specific applications, the various components of the communication apparatus 600 are coupled together by a bus system 603, which can include a data bus, a power bus, a control bus and a state signal bus, etc. However, for the sake of clarity, all the buses in the figure are marked as the bus system 603. In the figure, only the schematic drawing is shown.

[0275] In specific implementations, the communication apparatus 600 can perform the steps of the methods performed by the terminal device or the network device in the embodiments described above. Specifically, when the communication apparatus 600 is configured to implement each step performed by the terminal device or the network device in the communication method provided by the embodiments, the processor 601 can be configured to implement the functions of the processing unit 502 described above, and the transceiver 604 can be configured to implement the functions of the transceiving unit 501 described above.

[0276] It should be noted that in actual application, the processor in the embodiments of the present application can be an integrated circuit chip with signal processing capability. In the implementation process, each step of the above method embodiments can be completed by integrated logic circuits of hardware in the processor or instructions in the form of software. The processor described above can be a general processor, DSP, ASIC, FPGA, or other programmable logic device, discrete gate or transistor logic device, discrete hardware component. The disclosed methods, steps and logic block diagrams in the embodiments of the present application can be implemented or executed. The general processor can be a microprocessor or the processor can be any conventional processor. The steps of the method disclosed in combination with the embodiments of the present application can be directly embodied as hardware code processing or executed by hardware and software module combination in the code processing. The software module can be located in random access memory, flash memory, read only memory, programmable read only memory, electrically erasable programmable memory, register or other mature storage medium in the art. The storage medium is located in the storage, and the processor reads the information in the storage, and combines the hardware to complete the steps of the above method.

[0277] It can be understood that the memory in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be ROM, programmable read only memory (PROM), EPROM, electrically EPROM (EEPROM) or flash memory. The volatile memory can be RAM, which is used as an external cache. By way of example but not limitation, many forms of RAM can be used, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link dynamic random access memory (SLDRAM) and direct memory bus random access memory (DR RAM). It should be noted that the memory described in the embodiments of the present application is intended to include but not limited to these and any other suitable types of memory.

[0278] The present application also provides a computer readable medium having stored thereon a computer program, which, when executed by a computer, implements the method steps performed by the terminal device or the network device in the above embodiments.

[0279] The application further provides a computer program product, which, when executed by a computer, implements the method steps performed by the terminal device or the network device in the above embodiments.

[0280] The application further provides a chip including at least one processor. The at least one processor is configured to execute computer-executed instructions to enable a device in which the chip is installed to implement the method steps performed by the terminal device or the network device in the above embodiments.

[0281] Optionally, the chip can further include an interface circuit. The interface circuit is configured to receive computer-executed instructions and transmit the computer-executed instructions to the processor.

[0282] The application further provides a chip system including a processor configured to support a device in which the chip system is installed to implement the method steps performed by the terminal device or the network device in the above embodiments, such as generating or processing data and / or information involved in the above methods. In a possible design, the chip system further includes a memory configured to store program instructions and data necessary for the data transmitting device. The chip system can be composed of a chip, or can include a chip and other discrete devices.

[0283] Optionally, the chip system can further include an interface circuit. The interface circuit can be configured to receive computer-executed instructions and transmit the computer-executed instructions to the processor.

[0284] Please refer to FIG. 7, which is a structural schematic diagram of another communication apparatus provided in embodiments of the application. The communication apparatus 700 can include a processor 701 and an interface circuit 702. The interface circuit 702 can be configured to receive signals from other communication apparatuses outside the communication apparatus 700 and transmit the signals to the processor 701, or transmit signals from the processor 701 to other communication apparatuses outside the communication apparatus 700. The processor 701 can be configured to execute computer programs or instructions through a logic circuit to implement the communication method described in the foregoing embodiments.

[0285] In some possible designs, the communication apparatus 700 can be the terminal device described above, or an apparatus including the terminal device described above, or an apparatus included in the terminal device described above, such as a chip system. The communication apparatus 700 can also be the network device described above, or an apparatus of the network device described above, or an apparatus included in the network device described above.

[0286] The application further provides a communication system including at least the terminal device and the network device described above. The terminal device and the network device work cooperatively to implement the communication method described in the foregoing embodiments.

[0287] In the method embodiments described above, all or part of the method can be implemented by software, hardware, firmware, or any combination thereof. When implemented by software, all or part of the method can 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 can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions can be transferred from one website, computer, server or data center to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL) or wireless (such as infrared, wireless, microwave, etc.)) way. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. containing one or more available media sets. The available media can be magnetic media (such as floppy disk, hard disk, magnetic tape), optical media (such as high-density digital video disc (digital video disc, DVD), or semiconductor media (such as solid state disk (solid state disk, SSD) and the like.

[0288] In various embodiments of the present application, the terms and / or descriptions of different embodiments are consistent and can be referred to each other if there is no special description and logical conflict. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0289] It can be understood that the various numerical numbers involved in the embodiments of the present application are only for the convenience of differentiation, and do not limit the scope of the embodiments of the present application. The size of the serial number of the above processes does not mean the order of execution, and the execution order of the processes should be determined according to its function and inherent logic.

[0290] The above only describes the preferred embodiments of the technical scheme of the present application, and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A communication method characterized by comprising: The method comprises: receiving one or more first reference signals (RSs); determining a target path loss value according to the one or more first RSs; determining whether to transmit a proximity detection (PD) signal according to the target path loss value, and / or determining a target transmit power value of the PD signal according to the target path loss value.

2. The method of claim 1, wherein, The method further comprises: receiving first configuration information, wherein the first configuration information is used to configure a first time-frequency resource used for transmitting the PD signal.

3. The method of claim 2, wherein, The first configuration information comprises time domain location information and frequency domain location information of the first time-frequency resource.

4. The method of claim 3, wherein, The time domain location information of the first time-frequency resource comprises period information of a first time domain resource and time domain location bias information, the period information being used to indicate a period length of the first time-frequency resource, and the time domain location bias information being used to indicate a time domain bias or a time domain start position and a time domain end position of the first time-frequency resource in each period.

5. The method according to any one of claims 1 to 4, characterized in that, The target path loss value is a minimum path loss value among a plurality of path loss values determined according to the plurality of first RSs.

6. The method according to any one of claims 1 to 5, characterized in that, The one or more first RSs comprise a path loss reference signal (PL-RS) used to determine a transmit power value of an uplink signal.

7. The method according to any one of claims 2-4, characterized in that, The one or more first RSs comprise a second RS, and determining a target path loss value according to the one or more first RSs comprises: determining a target path loss value according to the second RS, the second RS being associated with the first time-frequency resource.

8. The method of claim 7, wherein, The first configuration information further comprises a first field used to indicate that the second RS is associated with the first time-frequency resource.

9. The method according to claim 7 or 8, characterized in that, An included angle between a beam direction of a first beam and a beam direction of a second beam is less than or equal to a first angle threshold, the first beam being a receive beam used to receive the second RS, and the second beam being a transmit beam used to transmit the PD signal.

10. The method of claim 9, wherein, A difference between a beam width of the first beam and a beam width of the second beam is less than or equal to a first width threshold.

11. The method according to any one of claims 1 to 10, characterized in that, Determining whether to transmit the PD signal according to the target path loss value comprises: transmitting the PD signal in a case where the target path loss value is greater than or equal to a path loss threshold.

12. The method of claim 11, wherein, The method further comprises: not transmitting the PD signal in a case where the target path loss value is less than the path loss threshold.

13. The method according to claim 11 or 12, characterized in that, The method further comprises: receiving first indication information, wherein the first indication information is used to indicate the path loss threshold.

14. The method according to any one of claims 1 to 13, characterized in that, Determining a target transmit power value of the PD signal according to the target path loss value comprises: determining the target transmit power value of the PD signal according to a sum of the target path loss value and a first power threshold.

15. The method according to any one of claims 1 to 13, characterized in that, Determining a target transmit power value of the PD signal according to the target path loss value comprises: determining the target transmit power value of the PD signal according to a minimum value of a sum of the target path loss value and a first power threshold and a first maximum power value, wherein the first maximum power value is a maximum transmit power value allowed for the PD signal on all frequency domain units of the first time-frequency resource.

16. The method according to any one of claims 1 to 13, characterized in that, determining the target transmission power value of the PD signal according to the target path loss value comprises: determining a target unit frequency domain power value according to a sum of the target path loss value and a second power threshold value, wherein the target unit frequency domain power value is a transmission power value of the PD signal on a single frequency domain unit of a first time-frequency resource; determining the target transmission power value of the PD signal according to the target unit frequency domain power value and a quantity of frequency domain units corresponding to the first time-frequency resource.

17. The method according to any one of claims 1 to 13, characterized in that, determining the target transmission power value of the PD signal according to the target path loss value comprises: determining a target unit frequency domain power value according to a minimum value of a sum of the target path loss value and a second power threshold value and a second maximum power value, wherein the second maximum power value is a maximum transmission power value of the PD signal on the single frequency domain unit, and the target unit frequency domain power value is a transmission power value of the PD signal on a single frequency domain unit of a first time-frequency resource; determining the target transmission power value of the PD signal according to the target unit frequency domain power value and a quantity of frequency domain units corresponding to the first time-frequency resource.

18. The method according to any one of claims 14-17, characterized by, The method further comprises: receiving second indication information, wherein the second indication information is used to indicate the first power threshold value and / or the second power threshold value.

19. The method according to any one of claims 14-18, characterized by, The method further comprises: if it is determined that the target transmission power value is less than a third preset power value, not transmitting the PD signal.

20. A method of communication, comprising: The method comprises: generating first configuration information, wherein the first configuration information is used to configure a first time-frequency resource, and the first time-frequency resource is used for a terminal device to transmit the PD signal; transmitting the first configuration information.

21. The method of claim 20, wherein, The first configuration information comprises time domain position information and frequency domain position information of the first time-frequency resource.

22. The method of claim 21, wherein, The time domain position information of the first time-frequency resource comprises period information of a first time domain resource and time domain position offset information, the period information is used to indicate a period length of the first time-frequency resource, and the time domain position offset information is used to indicate a time domain offset or a time domain start position and a time domain end position of the first time-frequency resource in each period.

23. The method of claim 21 or 22, wherein, The first configuration information further comprises a first field, and the first field is used to indicate that a second RS is associated with the first time-frequency resource.

24. The method of claim 23, wherein, The first configuration information further comprises configuration information of the second RS, the second RS is used for the terminal device to determine a target path loss value, the target path loss value is used for the terminal device to determine whether to transmit a proximity detection (PD) signal, and / or the target path loss value is used for the terminal device to determine a target transmission power value of the PD signal.

25. A communications device, characterized by The communication device is used to implement the communication method in any one of claims 1 to 19, or the communication method in any one of claims 20 to 24.

26. A computer readable storage medium, characterized in that, The computer readable storage medium stores a computer program, and when the computer program is executed, the communication method in any one of claims 1 to 19, or the communication method in any one of claims 20 to 24 is implemented.

27. A chip system, characterized by comprises a processor; The processor is configured to execute computer-executable instructions to cause a device in which the chip system is installed to perform the communication method of any one of claims 1-19, or the communication method of any one of claims 20-24.

28. The chip system of claim 27, wherein The chip system further comprises an interface circuit configured to receive the computer-executable instructions and transmit to the processor.

29. A computer program product, characterised in that, The computer program product is configured to cause a device in which the chip system is installed to perform the communication method of any one of claims 1-19, or the communication method of any one of claims 20-24.

30. A communications device, characterized by The communication device comprises at least one processor configured to execute a computer program stored in a memory to cause the communication device to perform the communication method of any one of claims 1-19, or the communication method of any one of claims 20-24.

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