Communication method and apparatus

Abstract

A communication method and apparatus. The method comprises: a UE determining a first power coefficient, wherein the first power coefficient is related to the frequency-domain power of a first signal after being reflected by a first apparatus; and the UE transmitting the first signal, wherein the transmission power of the first signal is determined on the basis of the first power coefficient. In the embodiments of the present application, the transmission power of the first signal can be determined on the basis of the first power coefficient, and the first power coefficient is related to the frequency-domain power of the first signal after being reflected by the first apparatus. For example, the amount of frequency-domain power loss of the first signal after being reflected by the first apparatus can be compensated for or reduced by means of the first power coefficient. Therefore, the solution provided in the embodiments of the present application can compensate for or reduce the frequency-domain power loss of a signal after being reflected by a first apparatus, thereby facilitating an improvement in the quality of a received signal.

Description

Communication method and apparatus

[0001] Cross-reference to Related Applications

[0002] This application claims priority to the Chinese Patent Application No. 202410798162.8, filed on June 19, 2024, and entitled “A Communication Method and Apparatus”, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the field of communication technology, and in particular to a communication method and apparatus. BACKGROUND

[0004] As a two-dimensional implementation of electromagnetic metamaterial, a reconfigurable intelligent surface (RIS) actively and intelligently controls spatial electromagnetic waves in a programmable manner to form an electromagnetic environment that is controllable in amplitude, phase, polarization, and frequency. The RIS can be disposed between a user equipment (UE) and a base station, and can reflect a signal from the UE to the base station to enhance coverage.

[0005] However, after being reflected by the RIS, the frequency domain power of the signal is lost. SUMMARY

[0006] Embodiments of the present application provide a communication method and apparatus for compensating or reducing the loss of frequency domain power of a signal.

[0007] In a first aspect, a first communication method is provided, which can be applied to a terminal-side apparatus, for example, also referred to as a terminal apparatus. The terminal apparatus is, for example, a terminal device, or other equipment including the function of a terminal device, or a circuit, or a chip system (or, a chip, for example, a modem chip, also referred to as a baseband chip, or a system on chip (SoC) chip or a system in package (SIP) chip containing a modem core, or other functional module capable of realizing the function of a terminal device, which is, for example, disposed in a terminal device. The method comprises: determining a first power coefficient, wherein the first power coefficient is related to the frequency domain power of a first signal after being reflected by a first apparatus; and transmitting the first signal, wherein the transmission power of the first signal is determined according to the first power coefficient.

[0008] In the embodiments of the present application, the transmission power of the first signal can be determined according to the first power coefficient, and the first power coefficient is related to the frequency domain power of the first signal after being reflected by the first device. For example, the first power coefficient can compensate or reduce the loss of the frequency domain power of the first signal after being reflected by the first device. Therefore, the scheme provided by the embodiments of the present application can compensate or reduce the loss of the frequency domain power of the signal after being reflected by the first device, which is beneficial to improve the quality of the received signal.

[0009] In an optional embodiment, the first power coefficient includes power coefficients of at least one resource unit, and the at least one resource unit is part or all of the resource units occupied by the first signal. For example, the first power coefficient includes at least one power coefficient, and each power coefficient corresponds to one resource unit. In this way, power control can be performed on the at least one resource unit respectively, so that the control granularity is finer, and it is beneficial to determine the transmission power or perform reasonable power compensation for different resource units (or different frequencies) respectively.

[0010] In an optional embodiment, before determining the first power coefficient, the method further includes: receiving first information, and the first information is used to determine the first power coefficient; wherein the first information is used to indicate one or more of the horizontal incidence angle, the horizontal exit angle, the vertical incidence angle, or the vertical exit angle of the first signal at the first device; or the first information is used to indicate the loss of the frequency domain power of the first signal after being reflected by the first device at a first frequency, and the first frequency is a non-center frequency of the first signal. The terminal device can determine the first power coefficient according to the first information, and the first information is from a network device or other third-party device.

[0011] In an optional embodiment, the first signal is transmitted in a sub-band, and the first information is further used to indicate the center frequency of the full band or the relative position of the sub-band in the full band. The terminal device transmits the first signal in the sub-band, but the steering vector used by the network device and the first device corresponds to the center frequency of the full band. Therefore, the first information can indicate the center frequency of the full band or the relative position of the sub-band in the full band, so that the terminal device can determine a more accurate first power coefficient.

[0012] In an optional implementation, determining the first power coefficient comprises: determining a first frequency domain power loss amount according to the first information, the first frequency domain power loss amount being a frequency domain power loss amount of the first signal after being reflected by the first device at at least one frequency; and determining the first power coefficient according to the first frequency domain power loss amount. The first frequency domain power loss amount reflects the power loss of the first signal in the frequency domain, and the terminal device determines the first power coefficient according to the first frequency domain power loss amount, so that the transmission power determined according to the first power coefficient can achieve better compensation for the frequency domain power loss.

[0013] In an optional implementation, the first frequency domain power loss amount satisfies the following relationship: Loss(n) = Π θ∈Θ |a(θ,f(n))a H (θ,f c )| 2 ; wherein Loss(n) represents the frequency domain power loss amount of the first signal after being reflected by the first device at frequency f(n), Π X x represents the multiplication of each element x in set X, |x| represents the absolute value of x, a(θ,f(n)) represents a phase rotation vector adopted by the first device when receiving or reflecting the first signal at frequency f(n), and a H (θ,f c ) represents the conjugate transpose of the phase rotation vector adopted by the first device when receiving or reflecting the first signal at frequency f c , and set Θ includes one or more of a horizontal incidence angle, a horizontal exit angle, a vertical incidence angle, or a vertical exit angle of the first signal at the first device.

[0014] In an optional implementation, the first power coefficient includes at least one power coefficient used to compensate for the transmission power of the first signal at at least one frequency, wherein the average of the at least one power coefficient is 1; or, a second power coefficient in the at least one power coefficient is 1, and the remaining power coefficients in the at least one power coefficient are greater than 1, and the second power coefficient is the power coefficient corresponding to the center frequency in the at least one frequency. The average of the at least one power coefficient included in the first power coefficient can be 1, for example, according to the transmission power of the first signal determined by the first power coefficient, the transmission power corresponding to the non-center frequency of the first signal is increased, and the transmission power corresponding to the center frequency of the first signal can be decreased, so that the total transmission power of the first signal can remain unchanged. In this way, the frequency domain power of the non-center frequency of the first signal can be better compensated, and power waste is also reduced. Alternatively, the second power coefficient in the at least one power coefficient is 1, and the remaining power coefficients in the at least one power coefficient are greater than 1. The compensation performance of this power compensation method is relatively good, and complete compensation for the frequency domain power loss of the first signal can be achieved, thereby improving the reception quality of the first signal.

[0015] In an optional implementation, the first power coefficient satisfies the following relationship: r(n) = βLoss -1 (n); wherein r(n) represents the first power coefficient, β represents a power normalization factor, and Loss(n) represents the frequency domain power loss amount of the first signal after being reflected by the first device at the frequency f(n).

[0016] In an optional implementation, the first signal is transmitted in subbands, and the transmission power of the first signal is determined according to the first power coefficient and a third power coefficient, and the third power coefficient is a cosine function. When the first signal is transmitted in subbands, by using the third power coefficient, the compensation window can be avoided by rectangular window truncation, so that the orthogonality between the first signal and other signals can be improved.

[0017] In an optional implementation, the cosine function is a Hamming window or a Hann window.

[0018] In an optional implementation, the first power coefficient satisfies the following relationship: wherein r(n) represents the first power coefficient, β represents a power normalization factor, and η represents the frequency domain power loss amount of the first signal after being reflected by the first device at a second frequency, wherein the second frequency represents the lowest frequency of the first signal, f c represents the center frequency of the first signal, and n represents the frequency index of the first signal.

[0019] In an optional implementation, the first signal is used for positioning. Alternatively, the first signal can be used for sensing, or the first signal can be used for communication, or the first signal can be used for sensing+positioning, or the first signal can be used for sensing+communication, or the first signal can be used for positioning+communication, or the first signal can be used for sensing+positioning+communication, and the like, without limitation on the use of the first signal.

[0020] In a second aspect, a second communication method is provided, which can be applied to a network-side device, for example, also referred to as a network device. The network device is, for example, a network equipment, or other equipment including the function of the network equipment, or a circuit, or a chip system (or, chip) or other functional module capable of implementing the function of the network equipment, for example, provided in the network equipment. The network equipment includes, for example, a core network equipment and / or an access network equipment. The network equipment can be located on the ground, or the network equipment is, for example, a satellite, or located on a satellite. The method includes: sending first information, the first information being used to determine a first power coefficient, wherein the first power coefficient is related to the frequency domain power of the first signal after being reflected by a first device; and receiving a first signal, the transmission power of the first signal being determined according to the first power coefficient.

[0021] In an optional implementation, the first power coefficient includes a power coefficient of at least one resource unit, the at least one resource unit being part or all of the resource units occupied by the first signal.

[0022] In an optional implementation, the first information is used to indicate one or more of a horizontal incidence angle, a horizontal exit angle, a vertical incidence angle, or a vertical exit angle of the first signal at the first device; or, the first information is used to indicate an amount of frequency domain power loss of the first signal after being reflected by the first device at a first frequency, the first frequency being a non-center frequency of the first signal.

[0023] In an optional implementation, the first signal is transmitted in a sub-band, wherein the first information is further used to indicate a center frequency of a full band; or, a frequency corresponding to a steering vector used to receive the first signal is a center frequency of the sub-band.

[0024] In an optional implementation, the method further includes: sending second information to the first device, the second information indicating a weight value used by the first device to reflect the first signal.

[0025] In an alternative implementation, the first signal is used for positioning. Alternatively, the first signal can be used for sensing, or the first signal can be used for communication, or the first signal can be used for sensing + positioning, or the first signal can be used for sensing + communication, or the first signal can be used for positioning + communication, or the first signal can be used for sensing + positioning + communication, etc., without limitation on the use of the first signal.

[0026] As to the technical effects brought by the second aspect or various alternative implementations, reference can be made to the introduction of the technical effects of the first aspect or corresponding implementation.

[0027] In a third aspect, a communication apparatus is provided. The communication apparatus can be the terminal-side apparatus of any of the first aspect to the second aspect. The communication apparatus has the functions of the terminal-side apparatus. For example, the communication apparatus has the functions of any of the first aspect to the second aspect, for example, the communication apparatus includes modules or units or means corresponding to the operations of any of the first aspect to the second aspect, which can be implemented by software, or by hardware, or by a combination of software and hardware. The communication apparatus is, for example, a terminal device, or other device including the functions of the terminal device, or a chip system (or, a chip or circuit) or other functional module, which can implement the functions of the terminal device, for example, is arranged in the terminal device. In an alternative implementation, the communication apparatus includes a baseband device and a radio frequency device. In another alternative implementation, the communication apparatus includes a processing unit (sometimes also referred to as a processing module) and a transceiving unit (sometimes also referred to as a transceiving module). The transceiving unit can implement the functions of sending and receiving, and when the transceiving unit implements the function of sending, it can be referred to as a sending unit (sometimes also referred to as a sending module), and when the transceiving unit implements the function of receiving, it can be referred to as a receiving unit (sometimes also referred to as a receiving module). The sending unit and the receiving unit can be the same functional module, which is referred to as a transceiving unit, and can implement the functions of sending and receiving; or the sending unit and the receiving unit can be different functional modules, and the transceiving unit is a general term for these functional modules.

[0028] In an alternative implementation, the processing unit is configured to determine a first power coefficient, where the first power coefficient is related to the frequency domain power of the first signal after being reflected by the first apparatus; and the transceiving unit (or the sending unit) is configured to send the first signal, and the sending power of the first signal is determined according to the first power coefficient.

[0029] In an alternative implementation, the communication apparatus further includes a storage unit (also referred to as a storage module), and the processing unit is configured to be coupled with the storage unit and execute programs or instructions in the storage unit to enable the communication apparatus to perform the functions of the network-side apparatus according to any one of the first aspect to the second aspect.

[0030] In a fourth aspect, a communication apparatus is provided. The communication apparatus can be the network-side apparatus according to any one of the first aspect to the second aspect. The communication apparatus has the functions of the network-side apparatus. For example, the communication apparatus has the functions of any one of the first aspect to the second aspect, e.g., the communication apparatus includes modules or units or means corresponding to the operations described in any one of the first aspect to the second aspect, which can be implemented in software, or implemented by hardware, or implemented in a combination of software and hardware. The communication apparatus can be, for example, a network device, or another device having the functions of the network device, or a chip system (or a chip or a circuit) or another functional module, which can have the functions of the network device, e.g., the chip system or the functional module is arranged in the network device. The network device can include, for example, a core network device and / or an access network device. In an alternative implementation, the communication apparatus includes a baseband apparatus and a radio frequency apparatus. In another alternative implementation, the communication apparatus includes a processing unit (also referred to as a processing module) and a transceiver unit (also referred to as a transceiver module). The implementation of the transceiver unit can be referred to the related description of the third aspect.

[0031] In an alternative implementation, the transceiver unit (or the sending unit) is configured to send first information, the first information being used to determine a first power coefficient, wherein the first power coefficient is related to a frequency domain power of the first signal after being reflected by the first apparatus; and the transceiver unit (or the receiving unit) is configured to receive the first signal, and a sending power of the first signal is determined according to the first power coefficient.

[0032] In an alternative implementation, the communication apparatus further includes a storage unit (also referred to as a storage module), and the processing unit is configured to be coupled with the storage unit and execute programs or instructions in the storage unit to enable the communication apparatus to perform the functions of the network-side apparatus according to any one of the first aspect to the second aspect.

[0033] In a fifth aspect, a communication apparatus is provided, which comprises a memory and one or more processors. The memory is configured to store part or all of a computer program or instructions necessary to implement the functions related to the first aspect or the second aspect described above. The one or more processors are configured to execute the computer program or instructions, when the computer program or instructions are executed, to cause the communication apparatus to implement the method in any possible design or implementation manner of the first aspect or the second aspect described above.

[0034] In a possible design of the communication apparatus, the communication apparatus further can comprise an interface circuit, and the processor is configured to communicate with other apparatuses or components through the interface circuit.

[0035] In a possible design of the communication apparatus, the communication apparatus further can comprise the memory.

[0036] The communication apparatus described above can be a terminal, or a communication module in the terminal, or a chip responsible for communication functions in the terminal, such as a modem chip (also referred to as a baseband chip) or an SoC or SIP chip containing a modem module.

[0037] In a sixth aspect, a communication apparatus is provided, which comprises a memory and one or more processors. The memory is configured to store part or all of a computer program or instructions necessary to implement the functions related to the first aspect or the second aspect described above. The one or more processors are configured to execute the computer program or instructions, when the computer program or instructions are executed, to cause the communication apparatus to implement the method in any possible design or implementation manner of the first aspect or the second aspect described above.

[0038] In a possible design of the communication apparatus, the communication apparatus further can comprise an interface circuit, and the processor is configured to communicate with other apparatuses or components through the interface circuit.

[0039] In a possible design of the communication apparatus, the communication apparatus further can comprise the memory.

[0040] The communication apparatus described above can be a network device, or a communication module in the network device, or a chip responsible for communication functions in the network device, such as a modem chip (also referred to as a baseband chip) or an SoC or SIP chip containing a modem module.

[0041] In a seventh aspect, a communication system is provided, which comprises a network-side apparatus. The network-side apparatus is configured to perform the method performed by the network-side apparatus in any one of the first aspect to the second aspect described above. For example, the network-side apparatus can be implemented by the communication apparatus in the fourth aspect or the sixth aspect.

[0042] Optionally, the communication system further comprises a terminal-side device, wherein the terminal-side device is configured to perform the method performed by the terminal-side device according to any one of the first aspect to the second aspect. For example, the terminal-side device can be implemented by the communication device according to the third aspect or the fifth aspect.

[0043] In an eighth aspect, a computer-readable storage medium is provided, which is configured to store a computer program or instructions, when the computer program or instructions are executed, causing the method performed by the terminal-side device or the network-side device according to the aspects to be implemented.

[0044] In a ninth aspect, a computer program product is provided, which comprises instructions, when the computer program or instructions are executed on a computer, causing the method according to the aspects to be implemented.

[0045] In a tenth aspect, a chip system is provided, which comprises a processor and an interface, the processor is configured to call and execute instructions from the interface, so that the chip system implements the method according to the aspects. BRIEF DESCRIPTION OF DRAWINGS

[0046] FIG. 1 is a schematic diagram of an application scenario of RIS;

[0047] FIG. 2 is a schematic diagram of parallel wave signals received by a base station;

[0048] FIG. 3 is a schematic diagram of frequency domain power loss of signals reflected by RIS;

[0049] FIG. 4 and FIG. 5 are schematic diagrams of two application scenarios of embodiments of the present application;

[0050] FIG. 6 is a flowchart of a communication method provided by an embodiment of the present application;

[0051] FIG. 7 is a schematic diagram of a full compensation window provided by an embodiment of the present application;

[0052] FIG. 8 is a schematic diagram of a cosine window provided by an embodiment of the present application;

[0053] FIG. 9 is a schematic diagram in which the first signal and other signals have good orthogonality in an embodiment of the present application;

[0054] FIG. 10 is a schematic diagram of a device provided by an embodiment of the present application;

[0055] FIG. 11 is a schematic diagram of another device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0056] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0057] In the embodiments of the present application, the number of nouns, unless otherwise specified, represents "a singular noun or a plural noun", i.e. "one or more". "At least one" means one or more, and "a plurality of" 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 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. The character " / " generally represents an "or" relationship between the associated objects. For example, A / B represents A or B. "At least one of the following" or similar expressions means any combination of these items, including any combination of single item or multiple items. For example, at least one of a, b, or c represents a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, and c can be single or multiple.

[0058] The ordinal numbers "first", "second", etc. mentioned in the embodiments of the present application are used to distinguish a plurality of objects, and are not used to limit the size, content, order, time sequence, priority or importance of the plurality of objects. In addition, the numbering of steps in each embodiment introduced in the present application is only to distinguish different steps, and is not used to limit the order of the steps.

[0059] In the following, some terms or concepts in the embodiments of the present application are explained and described to facilitate understanding by those skilled in the art.

[0060] In the embodiments of the present application, the terminal device is a device with wireless transceiving function, which can be a fixed device, a mobile device, a handheld device (for example, a mobile phone), a wearable device, a vehicle-mounted device, or a wireless device (for example, a communication module, a modem, or a chip system, etc.) built in the above devices. The terminal device is used to connect people, things, machines, etc., and can be widely used in various scenarios, for example, including but not limited to the following scenarios: sensing scenarios, cellular communication, device-to-device (D2D) communication, vehicle to everything (V2X) communication, machine-to-machine / machine-type communications (M2M / MTC), internet of things (IoT), virtual reality (VR), augmented reality (AR), industrial control, self driving, remote medical, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, unmanned aerial vehicle, robot, indoor commercial scenarios (such as mobile phone screen projection, file sharing, mobile phone to VR glasses video transmission) and other scenarios. When the terminal device is applied to V2X, it can also be referred to as a V2X device, for example, a smart car, a digital car, an unmanned car, a self-driving car, a pure EV, a hybrid electric vehicle (HEV), a range extended EV (REEV), a plug-in HEV (PHEV), a new energy vehicle, a road site unit (RSU), etc. The terminal device can also be a device in D2D communication, for example, a water meter, a gas meter, etc.

[0061] In addition, in the embodiments of the present application, the terminal device can also be a terminal device in an internet of things (IoT) system. The IoT is an important part of future information technology development. Its main technical feature is to connect objects to a network through communication technology, thereby realizing an intelligent network of human-machine interconnection and object-object interconnection.

[0062] As introduced above, various terminal devices can be considered as vehicle-mounted terminal devices if they are located on a vehicle (for example, placed in or installed in a vehicle), and the vehicle-mounted terminal device is also referred to as an on-board unit (OBU). The terminal device of the present application can also be a vehicle-mounted module, a vehicle-mounted module group, a vehicle-mounted component, a vehicle-mounted chip or a vehicle-mounted unit built in a vehicle as one or more components or units, and the vehicle can implement the method of the present application through the built-in vehicle-mounted module, vehicle-mounted module group, vehicle-mounted component, vehicle-mounted chip or vehicle-mounted unit.

[0063] The terminal device can also be referred to as a UE, a terminal, an access station, a UE station, a remote station, a wireless communication device, or a user device, etc.

[0064] In the embodiments of the present application, the communication device for implementing the function of the terminal device can be a terminal device, which can be a terminal device or a device capable of supporting the terminal device to implement the function, such as a chip system, which can be installed in the terminal device. In the technical solutions provided in the embodiments of the present application, the device for implementing the function of the terminal device is taken as an example of the terminal device to describe the technical solutions provided in the embodiments of the present application.

[0065] The network device in the embodiments of the present application, for example, includes an access network device (or an access network network element) and / or a core network device (or a core network network element). The access network device is a device with wireless transceiving function, used for communicating with the terminal device. The access network device includes but is not limited to a base station (a base transceiver station (BTS), a Node B, an evolved Node B (eNodeB) / eNB, or a next generation Node B (gNodeB) / gNB), a transmission reception point (TRP), a base station evolved in the future of the 3rd generation partnership project (3GPP), an access node in a wireless fidelity (Wi-Fi) system, a wireless relay node, a wireless backhaul node, and the like. The base station can be a macro base station, a micro base station, a pico base station, a small station, a relay station, and the like. A plurality of base stations can support a network of the same access technology or a network of different access technologies. A base station can include one or more co-sited or non-co-sited transmission reception points. The access network device can also be a wireless controller, a centralized unit (CU), and / or a distributed unit (DU) in a cloud radio access network (CRAN) scenario. The access network device can also be a server and the like. For example, the network device in the V2X technology can be a road side unit (RSU). The access network device is described below by taking a base station as an example. The base station can communicate with the terminal device or communicate with the terminal device through a relay station. The terminal device can communicate with a plurality of base stations in different access technologies. The core network device is used to implement mobile management, data processing, session management, policy and charging, and the like. The names of devices implementing core network functions in systems of different access technologies can be different, and the embodiments of the present application do not limit this.Taking a 5th generation (5G) system as an example, the core network device includes, for example, an access and mobility management function (AMF), a session management function (SMF), a policy control function (PCF), a user plane function (UPF), and the like.

[0066] In the CU-DU architecture, or in an open RAN (ORAN) system, the access network device can include one or more of a central unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU), and the like. 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 unit (AAU), or a remote radio head (RRH).

[0067] In different systems, the CU (or CU-CP and CU-UP), DU, or RU can also have different names, but those skilled in the art can understand their meanings. For example, in an ORAN system, the CU can also be referred to as an open CU (O-CU), the DU can also be referred to as an open DU (O-DU), the CU-CP can also be referred to as an open CU-CP (O-CU-CP), the CU-UP can also be referred to as an open CU-UP (O-CU-UP), and the RU can also be referred to as an open RU (O-RU). For the convenience of description, the CU, CU-CP, CU-UP, DU, and RU are taken as examples for description in the embodiments of the present application. Any one of the CU (or CU-CP, CU-UP), DU, and RU in the embodiments of the present application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0068] The CU and the DU can be configured according to protocol layer functions of the wireless network that they implement. For example, the CU is configured to implement functions of a packet data convergence protocol (PDCP) layer and above protocol layers (e.g., a radio resource control (RRC) layer and / or a service data adaption protocol (SDAP) layer, etc.); the DU is configured to implement functions of a PDCP layer and below protocol layers (e.g., one or more of a radio link control (RLC) layer, a media access control (MAC) layer, or a physical (PHY) layer). For another example, the CU is configured to implement functions of a PDCP layer and above protocol layers (e.g., an RRC layer and / or an SDAP layer), and the DU is configured to implement functions of a PDCP layer and below protocol layers (e.g., one or more of an RLC layer, a MAC layer, or a PHY layer).

[0069] The above configuration of the CU and the DU is merely an example, and the CU and the DU can be configured to have other functions as needed. For example, the CU or the DU can be configured to have functions of more protocol layers, or the CU or the DU can be configured to have partial processing functions of protocol layers. For example, partial functions of an RLC layer and functions of protocol layers above the RLC layer are configured in the CU, and remaining functions of the RLC layer and functions of protocol layers below the RLC layer are configured in the DU. For another example, the functions of the CU or the DU can be divided according to service types or other system requirements. For example, functions that require a shorter processing time can be configured in the DU, and functions that do not require the shorter processing time can be configured in the CU.

[0070] The DU and the RU can cooperate to implement functions of a PHY layer. One DU can be connected to one or more RUs. The DU and the RU can be configured in various manners according to design. For example, the DU is configured to implement baseband functions, and the RU is configured to implement intermediate radio frequency functions. For another example, the DU is configured to implement high-level functions in the PHY layer, and the RU is configured to implement low-level functions in the PHY layer or to implement the low-level functions and radio frequency functions. The high-level functions in the PHY layer can include a portion of functions of the PHY layer that are closer to a MAC layer, and the low-level functions in the PHY layer can include another portion of functions of the PHY layer that are closer to the intermediate radio frequency side.

[0071] In the embodiments of the present application, the communication device for implementing the function of the network device can be referred to as a network device, which can be a network element or a network device, or a device capable of supporting the network device or the network element to implement the function, such as a chip system, which can be installed in the network device. In the technical solutions provided in the embodiments of the present application, the device for implementing the function of the network device is taken as an example (for example, the device for implementing the function of the access network device is the access network device, and the device for implementing the function of the core network device is the core network device), and the technical solutions provided in the embodiments of the present application are described.

[0072] As a two-dimensional implementation of electromagnetic metamaterials, RIS actively and intelligently controls spatial electromagnetic waves in a programmable manner to form an electromagnetic environment that can be controlled in amplitude, phase, polarization, and frequency. Due to the design concept of using a small number of active devices or even all passive devices, and the use of metamaterials and splicable deployment, the intelligent metasurface has the advantages of low cost, low power consumption, low complexity, and easy deployment, and has the potential for deployment of future networks. RIS can also have other names, such as intelligent reflecting surface (IRS), reconfigurable reflecting surface (RRS), smart surface, transmissive metasurface, large intelligent metasurface (LIM), software-controlled metasurface, smart reflect-array, software-defined surface (SDS), passive intelligent surface (PIS), passive massive multiple input multiple output (passive massive MIMO), or distributed passive massive input multiple output (distributed passive massive MIMO), etc.

[0073] The entity hardware of the RIS usually includes a metasurface array and a control circuit. The metasurface array, as a carrier for implementing electromagnetic regulation, is the “body” of the RIS, and is usually composed of a series of periodically arranged electromagnetic units, which are also called reflecting units. Among them, the electromagnetic units can integrate some adjustable elements to obtain reconfigurability for electromagnetic wave regulation, such as positive-intrinsic-negative (PIN) diodes, varactor diodes, liquid crystals, micro-electro-mechanical system (MEMS) switches, etc. According to the specific regulation ability of the unit structure on the electromagnetic wave, the reconfigurable metasurface can be roughly divided into amplitude reconfigurable, phase reconfigurable, polarization reconfigurable, etc. To reduce the manufacturing cost of the RIS, the reflecting unit may only support discrete phase adjustment.

[0074] One application scenario of the RIS can be referred to FIG. 1. The line-of-sight (LOS) path of the UE to the base station is blocked, and when there is no RIS, the signal transmitted by the UE can only reach the base station through a non line-of-sight (NLOS) path, and the received signal strength of the base station is weak. After deploying the RIS between the UE and the base station, the base station can reasonably adjust the phase of the RIS to construct a stronger path on the base station-RIS-UE path, so that the RIS reflects the signal from the UE to the base station, thereby achieving enhancement in the weak coverage area.

[0075] The technical features related to the embodiments of the present application are introduced below.

[0076] As shown in FIG. 2, an example of a parallel wave signal received by the base station is shown. As can be seen from FIG. 1, since the parallel wave has an inclination angle of θ, the received signal reaching the antenna i of the base station has a path longer than the received signal reaching the antenna i+1 of the base station by a length of dsinθ, resulting in a phase rotation of Therefore, in order to receive the parallel wave with an arrival angle of θ, the base station can process the parallel wave signal by using a steering vector, each element of which corresponds to the weight of one antenna of the base station. The steering vector satisfies the following relationship:

[0077] wherein θ represents the arrival angle of the parallel wave, f c represents the center frequency of the signal, and N represents the number of antennas of the base station.[x] T represents the transpose of x.

[0078] Each element of the steering vector can be used to compensate for the phase rotation of the received signal, so as to make the phases of all the received signals as same as possible after compensation, so as to achieve the purpose of maximizing the energy after the signals are in phase and superimposed.

[0079] According to formula 1, the steering vector is related to the frequency of the signal. In theory, different frequencies of the signal should correspond to different steering vectors, and if a signal has multiple frequency components, different steering vectors should also be used for the signal on different frequency components. However, due to some practical reasons, such as complexity constraints, the base station will ignore the influence of frequency on the steering vector, and the signal will be received and processed as a whole using the steering vector corresponding to the center frequency f c of the signal. However, in addition to the center frequency f c , the signal also has frequency components f c ± Δf, where Δf represents the frequency deviation between the frequency component and the center frequency. At this time, for the signal on the frequency component, the steering vector will be deviated, and the deviation of the steering vector can be equivalent to the deviation of the angle of arrival θ, for example, the deviation of the steering vector and the deviation of the angle of arrival θ satisfy the following relationship: (f c ± Δf) sin θ = f c sin (θ ± Δθ) (formula 2)

[0080] In formula 2, Δθ represents the deviation of the angle of arrival θ.

[0081] For RIS, when receiving signals and reflecting signals, it will also use steering vectors for processing, and RIS also uses the steering vector corresponding to the center frequency of the signal. Wherein, RIS will use steering vectors for processing when receiving signals and reflecting signals, which means that the frequency domain power of the signal will be damaged multiple times, for example, referring to FIG. 3, a diagram for illustrating the damage of the frequency domain power of the signal, the horizontal axis of FIG. 3 represents the frequency, and the vertical axis represents the power. As can be seen, the frequency domain power corresponding to the center frequency of the signal is less damaged or not damaged, but other frequencies except the center frequency are more damaged.

[0082] Therefore, the embodiments of the present application can process the frequency power of the signal at the signal sending end, for example, compensation. For example, the transmission power of the first signal can be determined according to the first power coefficient, and the first power coefficient is related to the frequency domain power of the first signal after being reflected by the first device, for example, the first power coefficient can compensate or reduce the frequency domain power loss of the first signal after being reflected by the first device. Therefore, the scheme provided by the embodiments of the present application can compensate or reduce the frequency domain power loss of the signal after being reflected by the first device, which is beneficial to improve the quality of the received signal.

[0083] The technical solutions provided by the embodiments of the present application can be applied in a fourth generation (4G) mobile communication system, for example, a LTE system, or can be applied in a 5G system, for example, a NR system, or can also be applied in a next generation mobile communication system or other similar communication systems, for example, a future communication system, or applied in an existing satellite mobile communication technology system, and the specific application is not limited.

[0084] Please refer to FIG. 4, which is a schematic diagram of a network architecture. FIG. 4 includes a network device, a UE and a RIS. The network device and the UE can communicate directly, or can communicate through the RIS. For example, in an actual communication scenario, the shielding of some obstacles (for example, buildings, walls, etc.) can cause the UE and the network device to have no LOS path, thereby causing the received signal quality of the network device to be poor and affecting the communication performance. The RIS can change the direction of the NLOS path to improve the NLOS path to the LOS path as much as possible, thereby improving the channel environment of the weak coverage area and improving the communication performance of the UE and other devices in the weak coverage area.

[0085] Please refer to FIG. 5, which is a schematic diagram of a positioning scenario. FIG. 5 includes a network device and a UE, and RIS1 and RIS2 are arranged between the network device and the UE, and the network device, RIS1 and RIS2 can participate in the positioning of the UE. For example, the network device receives a positioning sounding reference signal (SRS) from the UE, estimates the multipath delay of the channel according to the positioning SRS, thereby calculating the distance of the direct path from the UE to the network device, and calculating the distance of the non-direct path from the UE to the network device through each RIS. It is generally assumed that the position of each RIS and the distance from each RIS to the network device are measurable. Therefore, the network device can further determine the distance of the direct path from the UE to the network device, and determine the distance from the UE to each RIS, thereby positioning the UE. For example, a circle is drawn with the network device as the center and the distance of the direct path from the UE to the network device as the radius, and a circle is also drawn with each RIS as the center and the distance from the UE to the RIS as the radius. In an ideal case, the multiple circles have a common intersection point, and the intersection point is the position of the UE. In actual positioning, some or all of the circles may have a certain deviation, so the position of the UE can be estimated near the intersection point.

[0086] The method provided in the embodiments of the present application can be applied to a positioning scenario, for example, the scenario shown in FIG. 5; or can also be applied to other scenarios that are not positioning, for example, the scenario shown in FIG. 4; or can also be applied to other scenarios in addition to FIG. 4 and FIG. 5, for example, a communication+positioning scenario, and the like, without limitation. In view of this, the method provided in the embodiments of the present application can be referred to as a communication method, or can also be referred to as a positioning method, and the like, without limitation on the name, and hereinafter, the communication method is taken as an example.

[0087] The communication method provided in the embodiments of the present application can be applied to a fourth generation (4th generation, 4G) communication system, for example, a long term evolution (long term evolution, LTE) communication system, and can also be applied to a fifth generation (5th generation, 5G) communication system, for example, a 5G new radio (new radio, NR) communication system, or a communication system evolved after 5G, for example, a future communication system. The method provided in the embodiments of the present application can also be applied to a bluetooth (bluetooth) system, a wireless fidelity (wireless fidelity, Wifi) system, a long range radio (long range radio, LoRa) system, or a vehicle-to-everything (vehicle-to-everything, V2X) system. The method provided in the embodiments of the present application can also be applied to a satellite communication system, wherein the satellite communication system can be integrated with the above-mentioned communication system. The method provided in the embodiments of the present application can be used in a scenario of only positioning and not communication, or can also be used in a scenario of communication+positioning, or can also be used in a scenario of only communication and not positioning. For example, the first signal in the embodiments of the present application can be used for positioning and / or communication.

[0088] The method provided in the embodiments of the present application will be described below in combination with the accompanying drawings. In various embodiments of the present application, a signal used to implement a positioning function or a positioning service is referred to as a positioning signal, for example, the positioning signal includes an SRS, and the like. In various embodiments of the present application, the first device is, for example, an RIS, or can also be another device capable of reflecting a signal, without limitation. In the corresponding drawings of various embodiments of the present application, the steps represented by the dashed lines are optional steps. The various embodiments herein can be applied to the network architecture shown in FIG. 4 or FIG. 5. For example, the UE described in the various embodiments herein can be the UE shown in FIG. 4 or FIG. 5, the network device described in the various embodiments herein can be the network device shown in FIG. 4 or FIG. 5, and the first device described in the various embodiments herein can be the RIS shown in FIG. 4, or any one of the RIS shown in FIG. 5.

[0089] The present application provides a communication method, please refer to FIG. 6, which is a flowchart of the method.

[0090] S601, the UE determines a first power coefficient.

[0091] The first power coefficient is related to the frequency domain power (or frequency domain energy) of the first signal after being reflected by the first device. Optionally, the first power coefficient can be used to determine or compensate for the loss of frequency domain power of the first signal after being reflected by the first device. For example, the signal (e.g., the first signal) to be sent by the UE can reach the network device after being reflected by the first device. During the reflection of the first device, the frequency domain energy of the first signal can be lost due to the fact that the frequency corresponding to the steering vector used by the first device does not necessarily correspond to each frequency of the first signal. Therefore, the UE in the embodiment of the present application can determine the transmission power of the first signal according to the first power coefficient, for example, the transmission power of the first signal at some or all frequencies can be compensated by the first power coefficient, so that the first power coefficient helps to reduce or compensate for the loss of frequency domain power of the first signal after being reflected by the first device. For example, the frequency domain power of the first signal can be lost by X dB after being reflected by the first device, and the X dB can be compensated as much as possible by the first power coefficient when the first signal is transmitted.

[0092] Optionally, the first power coefficient can include at least one power coefficient of a resource unit, for example, the first power coefficient includes at least one power coefficient, and each power coefficient in the at least one power coefficient corresponds to a resource unit. This correspondence can also be understood as each power coefficient in the at least one power coefficient can be used to determine (or compensate) the transmission power of the first signal on the resource unit corresponding to the power coefficient. For example, the first power coefficient includes power coefficient 1 and power coefficient 2, where power coefficient 1 corresponds to resource unit 1 occupied by the first signal, and power coefficient 1 can be used to determine the transmission power of the first signal on resource unit 1; in addition, power coefficient 2 corresponds to resource unit 2 occupied by the first signal, and power coefficient 2 can be used to determine the transmission power of the first signal on resource unit 2. The at least one resource unit can be part or all of the resource units occupied by the first signal. In the embodiment of the present application, the resource unit is, for example, a resource element (RE), and the embodiment of the present application can realize RE-level power control; or the resource unit can also be a resource block (RB), and the embodiment of the present application can realize RB-level power control; or the resource unit can also be a RB set or other frequency domain units, etc., which are not limited in the embodiment of the present application. It can be seen that the granularity of power control can be refined in the embodiment of the present application, so as to facilitate determining the transmission power for different resource units (or different frequencies) respectively, or performing reasonable power compensation respectively.

[0093] For example, the first power coefficient is denoted as r(n), where n represents an index of a frequency (e.g., a frequency of a resource unit occupied by the first signal) occupied by the first signal, e.g., n represents a subcarrier n or an RB n, etc. For example, the first signal occupies resource unit 1 and resource unit 2, the first power coefficient can include a power coefficient 1 corresponding to resource unit 1, and a power coefficient 2 corresponding to resource unit 2. Wherein the frequency index of resource unit 1 is a, and the frequency index of resource unit 2 is b, r(n) = r(a) + r(b), where r(a) represents the power coefficient 1, and r(b) represents the power coefficient 2.

[0094] There can be different designs for the first power coefficient, or different implementations of the first power coefficient. As an optional implementation of the first power coefficient, the average of the at least one power coefficient included in the first power coefficient can be 1. For example, in the transmission power of the first signal determined according to the first power coefficient, the transmission power corresponding to the non-central frequency of the first signal is increased, and the transmission power corresponding to the central frequency of the first signal can be decreased, so that the total transmission power of the first signal can remain unchanged (e.g., the transmission power of the first signal determined according to the first power coefficient can be the same as the transmission power of the first signal determined without the first power coefficient). The reason for increasing the transmission power corresponding to the non-central frequency of the first signal and decreasing the transmission power corresponding to the central frequency of the first signal is that the frequency domain power of the first signal on the non-central frequency can be lost or lost greatly after the first signal is reflected by the first device, and the frequency domain power of the first signal on the central frequency can not be lost or lost less, so that the frequency domain power corresponding to the non-central frequency of the first signal can be better compensated in this way, and the power waste is also reduced. And keeping the total transmission power of the first signal unchanged can help the UE to save energy, and is also conducive to the network equipment to control the transmission power of the UE.

[0095] Alternatively, as another optional implementation of the first power coefficient, one of the at least one power coefficient included in the first power coefficient (for example, referred to as a second power coefficient) can be 1, and the remaining power coefficients except the second power coefficient among the at least one power coefficient can be greater than 1. The second power coefficient is, for example, a power coefficient corresponding to a center frequency (or a center frequency of the first signal) among the at least one power coefficient. In this way, it can also be understood that, in the transmission power of the first signal determined according to the first power coefficient, for example, the transmission power corresponding to the non-center frequency of the first signal is increased, and the transmission power corresponding to the center frequency of the first signal can remain unchanged. The compensation performance of this power compensation manner is relatively good, and complete compensation for the frequency domain power loss of the first signal can be achieved, and the reception quality of the first signal is improved. In this compensation manner, the transmission power of the first signal determined according to the first power coefficient can be greater than the transmission power of the first signal determined without the first power coefficient.

[0096] Alternatively, the first power coefficient can be related to the first frequency domain power loss amount, or the first power coefficient can be determined according to the first frequency domain power loss amount. The first frequency domain power loss amount can be the frequency domain power loss amount of the first signal after being reflected by the first device, and the at least one frequency can be the frequency of the at least one resource unit occupied by the first signal. For example, the resource unit is a RE, and the frequency of the resource unit can be the frequency of the subcarrier; or the resource unit is a RB, and the frequency of the resource unit can be the frequency of the RB, and the like. The first frequency power loss amount is, for example, related to the angle of the first signal at the first device, and the first frequency domain power loss amount can be determined according to the angle of the first signal at the first device. Alternatively, the angle of the first signal at the first device can include one or more of the following: the horizontal angle of arrival (AoA) of the first signal at the first device, the horizontal angle of departure (AoD) of the first signal at the first device, the vertical angle of arrival (ZoA) of the first signal at the first device, or the vertical angle of departure (ZoD) of the first signal at the first device. As an optional implementation of the first frequency power loss amount, the first frequency power loss amount satisfies the following relationship, for example: Loss(n) = Π θ∈Θ |a(θ,f(n))a H (θ,f c )| 2 (Formula 3)

[0097] wherein n represents an index of a frequency occupied by the first signal (e.g., a frequency of a resource unit occupied by the first signal), e.g., n represents a subcarrier n or an RB n, etc. f(n) can represent a frequency occupied by the first signal, e.g., f(n) represents a frequency with index n occupied by the first signal. Loss(n) represents an amount of power loss in a frequency domain of the first signal after being reflected by the first device. X x represents a continuous multiplication of each element x in a set X, and |x| represents an absolute value of x. a(θ, f(n)) represents a phase rotation vector adopted by the first device when receiving or reflecting the first signal at a frequency f(n). a H (θ, f c ) represents a conjugate transpose of a phase rotation vector adopted by the first device when receiving or reflecting the first signal at a frequency f c . A set Θ includes one or more of a horizontal incidence angle, a horizontal exit angle, a vertical incidence angle, or a vertical exit angle of the first signal at the first device. c represents a center frequency, e.g., referred to as a center frequency A. The center frequency A can be a center frequency of the first signal, or can also be a center frequency of a full band (e.g., a system bandwidth, e.g., a bandwidth of a certain carrier). Wherein the first signal can be transmitted through the full band, the center frequency A is both the center frequency of the full band and the center frequency of the first signal, and the center frequency of the first signal is the same as the center frequency of the full band; or the first signal can also be transmitted through a subband (e.g., a bandwidth part (BWP)), and the center frequency A can be the center frequency of the first signal or the center frequency of the full band, wherein the center frequency of the first signal is the same as or different from the center frequency of the full band.

[0098] Optionally, a(θ, f(n)) satisfies the following relationship, for example:

[0099] wherein N represents an antenna quantity of the first device. T represents a transpose of x.

[0100] The first power coefficient can be determined according to the first frequency domain power loss amount. Optionally, the first power coefficient can satisfy the following relationship: r(n) = βLoss -1 (n) (Formula 5)

[0101] In formula 5, r(n) represents the first power coefficient. Loss -1 (n) represents β represents an energy normalization factor, by which the value of Loss(n) can reach a maximum value, for example, 1, when n is the center frequency A. Alternatively, β can be related to different implementations of the first power coefficient, for example, if the average value of the at least one power coefficient included in the first power coefficient is 1, then β=β1; or if the second power coefficient is 1 and the remaining power coefficients in the at least one power coefficient other than the second power coefficient are greater than 1, then β=β2. Wherein β1 and β2 can be equal or not equal.

[0102] r(n) satisfying formula 5 can be referred to as a complete compensation window, and the transmitted power compensated by the complete compensation window can be referred to with reference to FIG. 7. The horizontal axis in FIG. 7 represents frequency, and the vertical axis represents power. It can be seen that the closer to the center frequency, the smaller the compensated power, and the closer to the edge frequency, the greater the compensated power. The frequency domain energy loss of the first signal after being reflected by the first device can be referred to FIG. 3 described above. It can be seen that the closer to the center frequency, the smaller the loss of frequency domain power, and the closer to the edge frequency, the greater the loss of frequency domain power. Therefore, by the first power coefficient provided by the embodiments of the present application, more compensation can be performed on the frequency domain power corresponding to the non-center frequency, and less or no compensation is performed on the frequency domain power corresponding to the center frequency, which can compensate for the frequency domain power loss of the first signal after being reflected by the first device, and can also save transmitted power as much as possible.

[0103] One way for the UE to determine the first power coefficient includes that the UE can determine the first power coefficient according to the first information. The first information is, for example, from the network device, and then the UE can receive the first information to determine the first power coefficient. The first information, for example, indicates one or more of the horizontal incidence angle of the first signal at the first device, the horizontal exit angle of the first signal at the first device, the vertical incidence angle of the first signal at the first device, or the vertical exit angle of the first signal at the first device. The UE determines the first frequency domain power loss amount according to the angle indicated by the first information in combination with the aforementioned formula 3. According to the first frequency power loss amount, in combination with the aforementioned formula 5, the first power coefficient can be determined.

[0104] Alternatively, the first information can indicate a frequency domain power loss amount of the first signal after being reflected by the first device at a first frequency, and the first frequency can be a non-central frequency of the first signal. For example, the first frequency can be a lowest frequency occupied by the first signal, or can be a highest frequency occupied by the first signal, or can be any non-central frequency occupied by the first signal. The UE can determine the first frequency domain power loss amount according to the frequency domain power loss amount of the first signal after being reflected by the first device at the first frequency. According to the first frequency power loss amount, the UE can determine the first power coefficient in combination with the aforementioned formula 5. Taking the first frequency as an example, which is the lowest frequency occupied by the first signal, for example, subcarrier 0, the first information indicates that the frequency domain power loss amount of the first signal after being reflected by the first device at the first frequency can be Loss(0). For example, the network device can determine Loss(0) according to one or more of a horizontal incidence angle of the first signal at the first device, a horizontal exit angle of the first signal at the first device, a vertical incidence angle of the first signal at the first device, or a vertical exit angle of the first signal at the first device, and indicate Loss(0) to the UE through the second information. The UE can deduce Loss(n) according to Loss(0), and determine the first power coefficient in combination with the aforementioned formula 5. Whether the first information indicates one or more of the horizontal incidence angle of the first signal at the first device, the horizontal exit angle of the first signal at the first device, the vertical incidence angle of the first signal at the first device, or the vertical exit angle of the first signal at the first device, or indicates the frequency domain power loss amount of the first signal after being reflected by the first device at the first frequency, the amount of information indicated is small, which is beneficial to saving the transmission overhead of the first information.

[0105] Alternatively, the first information can also indicate the first frequency power loss amount, so that the UE can not have to calculate the first frequency power loss amount, and the implementation of the UE can be simplified. The UE can determine the first power coefficient according to the first frequency power loss amount in combination with the aforementioned formula 5.

[0106] The network device can schedule the UE to transmit the first signal in the full band. Alternatively, the network device can also schedule the UE to transmit the first signal in a sub-band. For example, the network device can schedule the UE to concentrate the transmission power in the sub-band to transmit the first signal in order to increase the signal noise ratio (SNR) of the first signal. For another example, the UE is configured with a BWP, for example, the network device configures the UE with a BWP for the UE to use when the UE accesses the network according to the capability and requirement of the UE, and in this case, the network device can schedule the UE to transmit the first signal in the sub-band, for example, the sub-band is the BWP. In this case, if the network device schedules the UE to transmit the first signal in the full band, the center frequency of the full band and the center frequency of the first signal can be the same frequency, and the steering vector used by the network device and the steering vector used by the first device correspond to the center frequency of the full band. Alternatively, if the network device schedules the UE to transmit the first signal in the sub-band, the center frequency of the full band and the center frequency of the first signal can be the same or different. For example, the full band occupies a frequency of 6.3 GHz to 6.6 GHz, and the center frequency of the full band is 6.45 GHz; if the sub-band occupies a frequency of 6.4 GHz to 6.5 GHz, the center frequency of the sub-band overlaps with the center frequency of the full band; or if the sub-band occupies a frequency of 6.5 GHz to 6.6 GHz, the center frequency of the sub-band is different from the center frequency of the full band.

[0107] If the center frequency of the sub-band is different from the center frequency of the full band, as an optional implementation, the network device can modify the frequency corresponding to the steering vector used by the network device and the steering vector used by the first device to the center frequency of the sub-band. In this case, the network device transmits the first information to the UE, and the UE can determine the first power coefficient according to the above-mentioned manner. For example, if the network device only schedules the UE to transmit the first signal and does not schedule other UEs to transmit signals (for example, signals for positioning), the network device can modify the frequency corresponding to the steering vector used by the network device and the steering vector used by the first device to the center frequency of the sub-band.

[0108] Alternatively, even if the center frequency of the sub-band is different from the center frequency of the full band, the network device can not modify the frequency corresponding to the steering vector used by the network device and the steering vector used by the first device, e.g., the frequency corresponding to the steering vector used by the network device and the steering vector used by the first device is still the center frequency of the full band. For example, the network device schedules multiple UEs to transmit signals, and the sub-bands of the signals transmitted by different UEs can be different, then the steering vectors used by the network device and the first device are not suitable for being adjusted according to the center frequency of the sub-band occupied by each UE, and thus the network device can not modify the frequency corresponding to the steering vector used by the network device and the steering vector used by the first device, and the frequency corresponding to the steering vector used by the network device and the steering vector used by the first device is still the center frequency of the full band. In this case, as an optional implementation, the network device can indicate the center frequency of the full band to the UE, or indicate the relative position of the sub-band in the full band. For example, the first information can also indicate the center frequency of the full band, or indicate the relative position of the sub-band in the full band, or the network device can also send other information to indicate the center frequency of the full band, or indicate the relative position of the sub-band in the full band. Alternatively, the relative position of the sub-band in the full band can be measured by the difference between the center frequency of the sub-band and the center frequency of the full band; thus, the network device indicates the relative position of the sub-band in the full band, one indication manner is that the network device indicates the difference between the center frequency of the sub-band and the center frequency of the full band. The UE determines the first frequency domain power loss amount according to the center frequency of the full band, or according to the relative position of the sub-band in the full band, and in combination with the content indicated by the first information (e.g., one or more of the horizontal incidence angle of the first signal at the first device, the horizontal exit angle of the first signal at the first device, the vertical incidence angle of the first signal at the first device, or the vertical exit angle of the first signal at the first device, or the frequency domain power loss amount of the first signal reflected by the first device at the first frequency, etc.). For example, the UE determines the first frequency domain power loss amount according to the aforementioned formula 3, wherein f c may be the center frequency of the first signal, e.g., the center frequency of the sub-band. In this case, the first frequency domain power loss amount determined by the UE can be a part of the frequency domain power loss amount corresponding to the full band, i.e., the UE determines the frequency domain power loss amount of the first signal at the sub-band, instead of the frequency domain power loss amount of the first signal at the full band. Further, the UE determines the first power coefficient according to the determined first frequency domain power loss amount, in combination with the aforementioned formula 5. At this time, the determined first power coefficient can be considered as adding a rectangular window to the original compensation window (e.g., the complete compensation window) corresponding to the first power coefficient, so as to truncate the original complete compensation window, and the truncated complete compensation window is the compensation window corresponding to the sub-band.

[0109] After the UE determines the first power coefficient, the UE can determine the transmission power of the first signal according to the first power coefficient. Optionally, the transmission power of the first signal satisfies the following relationship: P1=r(n)·P, or P1=r(n)×P (Formula 6)

[0110] wherein P1 represents the transmission power of the first signal, and P represents the original transmission power of the first signal, for example, P is the transmission power calculated according to the power control formula. Taking the first signal as SRS for example, P satisfies the following relationship: P SRS,b,f,c (i,q s ,l)=min{P CMAX,f,c (i),P O_SRS,b,f,c (q s )+10lg(2 μ M SRS,b,f,c (i))+α SRS,b,f,c (q s )· PL b,f,c (q d )+h b,f,c (i,l)} (Formula 7)

[0111] wherein P SRS,b,f,c (i,q s ,l) is an example of P. P CMAX,f,c (i) represents the maximum output power of the UE configured on the carrier f, the serving cell c, and the SRS transmission occasion i. P O_SRS,b,f,c (q s ) represents the reference signal resource set q s on the uplink BWP b, the carrier f, and the serving cell c. Taking the reference signal as SRS for example, the reference signal resource set q s may be the SRS resource set q s . P O_SRS,b,f,c (q s ) is the per-RB received power level expected by the network device. M SRS,b,f,c (i) represents the SRS transmission bandwidth on the uplink BWP b, the carrier f, the serving cell c, and the SRS transmission occasion i. α SRS,b,f,c (q s ) represents the SRS resource set q s on the uplink BWP b, the carrier f, the serving cell c, and the SRS transmission occasion i. PL b,f,c (q d ) represents the downlink loss on the uplink BWP b, the carrier f, the serving cell c, and the SRS transmission occasion i. h b,f,c(i, l) represents the power of the SRS and the physical uplink shared channel (PUSCH) related to the SRS and the physical uplink shared channel (PUSCH) on the uplink BWP b, the carrier f, the serving cell c, and the SRS transmission occasion i. q s represents a reference signal resource set (for example, an SRS resource set), and the SRS resource set q s includes one or more reference signal resources (for example, SRS resources). q d represents the index of the SRS for downlink loss estimation. l represents the index of the reference signal resource. c represents the serving cell of the UE. μ represents the subcarrier spacing corresponding to the physical uplink control channel (PUCCH).

[0112] The formula 5 in the foregoing introduces a relationship that the first power coefficient can satisfy, or the first power coefficient can not necessarily satisfy the formula 5, but can satisfy other relationships. Alternatively, the first power coefficient can satisfy the following relationship:

[0113] wherein r(n) represents the first power coefficient. β represents a power normalization factor. η represents the frequency domain power loss amount of the first signal on the second frequency after being reflected by the first device, wherein the second frequency represents the lowest frequency of the first signal. For example, if the lowest frequency of the first signal is subcarrier 0, the second frequency can be Loss(0). f c represents the center frequency A, and the introduction of the center frequency A can refer to the foregoing. n represents the index of the frequency occupied by the first signal, for example, n represents subcarrier n or RB n, etc. Wherein, r(n) satisfying the formula 6 can be a cosine window or a cosine function. Using the cosine window to realize r(n) helps to improve the orthogonality between the first signal (representing the signal transmitted by the UE according to the transmission power determined by the first power coefficient) and other signals (representing the signal transmitted by the UE without determining the transmission power according to the first power coefficient) in the embodiments of the present application.

[0114] The transmission power compensated by the r(n) cosine window satisfying the formula 6 can refer to FIG. 8. In FIG. 8, the horizontal axis represents the frequency, and the vertical axis represents the power. It can be seen that the closer to the center frequency, the smaller the compensated power, and the closer to the edge frequency, the greater the compensated power. And the frequency domain energy loss of the first signal after being reflected by the first device can refer to FIG. 3. Through the first power coefficient provided by the embodiments of the present application, more compensation can be made to the frequency domain power corresponding to the non-center frequency, and less or no compensation is made to the frequency domain power corresponding to the center frequency, which can compensate for the frequency domain power loss of the first signal after being reflected by the first device, and can also save power as much as possible.

[0115] In the above, no matter whether the network device schedules the UE to transmit the first signal in the sub-band or in the full band, the UE still determines the first frequency domain power loss amount according to the first information when the first power coefficient satisfies the formula 8. For example, the UE can determine the first frequency domain power loss amount according to the first frequency domain power loss amount of the first signal after being reflected by the first device at the first frequency indicated by the first information. Or, the UE can determine the first frequency domain power loss amount according to the angle indicated by the first information in combination with the formula 3. In the above, no matter whether the UE transmits the first signal in the sub-band or in the full band, f in the formula 3 can be the center frequency of the full band. c In the above, no matter whether the UE transmits the first signal in the full band or in the sub-band, the UE can determine the first power coefficient according to the determined first frequency power loss amount in combination with the formula 8. In the above, f in the formula 8 can be the center frequency of the full band. c In the above, f in the formula 8 can be the center frequency of the full band.

[0116] After determining the first power coefficient, the UE can determine the transmission power of the first signal according to the first power coefficient. In the above, if the network device schedules the UE to transmit the first signal in the full band, the first transmission power can satisfy the formula 6. Or, if the network device schedules the UE to transmit the first signal in the sub-band, the UE can determine the transmission power of the first signal according to the first power coefficient in the following way. The UE can determine the transmission power of the first signal according to the first power coefficient and the third power coefficient, which will be introduced below.

[0117] According to the foregoing introduction, when the first power coefficient satisfies formula 5, if the network device schedules the UE to send the first signal in the sub-band, and the center frequency of the sub-band is different from the center frequency of the full band, the sending power of the UE determined according to the first power coefficient is equivalent to adding a rectangular window to the compensation window (for example, a complete compensation window) corresponding to the original first power coefficient, so as to truncate the original complete compensation window, and the truncated complete compensation window is the compensation window corresponding to the sub-band. In order to improve the orthogonality between the signal sent by the UE according to the sending power determined according to the first power coefficient and the signal sent by the UE without determining the sending power according to the first power coefficient, when the first power coefficient satisfies formula 8, and the UE sends the first signal in the sub-band, the UE can also not use the truncated compensation window to determine the sending power. Optionally, the UE can determine the sending power of the first signal according to the first power coefficient and a third power coefficient, and the third power coefficient is, for example, a cosine function. Optionally, the cosine function is, for example, a Hamming window or a Hanning window. In this regard, it can be understood that the UE can add a cosine window to the first power coefficient, that is, a cosine window, to determine the sending power of the first signal. Optionally, the third power coefficient can be the power coefficient corresponding to the sub-band, for example, the UE adds the cosine window corresponding to the sub-band. Optionally, the sending power of the first signal can satisfy the following relationship: P1=r(n)·r1(n)·P, or P1=r(n)×r1(n)×P (formula 9)

[0118] wherein P1 represents the sending power of the first signal, P represents the original sending power of the first signal, for example, P is the sending power calculated according to the power control formula. For examples of P, refer to the foregoing formula 7. r1(n) represents the third power coefficient. The third power coefficient can also include at least one power coefficient, and the at least one power coefficient can correspond to at least one resource unit, and each power coefficient in the at least one power coefficient can correspond to a resource unit. The correspondence can also be understood as that each power coefficient can be used to determine (or compensate) the sending power of the first signal in the resource unit corresponding to the power coefficient.

[0119] For example, P=P SRS,b,f,c (i,q s ,l) is taken as an example, one example of formula 9 is as follows:

[0120] wherein, P1 represents the sending power of the first signal.

[0121] For example, the first power coefficient satisfies formula 8. The center frequency of the full band is 6.7 GHz, and the bandwidth of the full band is 400 MHz. The network device schedules the UE to send the first signal on a sub-band, the frequency occupied by the sub-band is 6.5 GHz-6.6 GHz, the bandwidth of the sub-band is 100 MHz, and the center frequency of the sub-band is 6.55 GHz. It can be seen that the center frequency of the sub-band is different from the center frequency of the full band. The network device can not modify the frequency corresponding to the steering vector used by the network device and the steering vector used by the first device, for example, the frequency corresponding to the steering vector used by the network device and the steering vector used by the first device is still the center frequency of the full band. In this case, the UE can determine the first frequency domain power loss amount according to the above-mentioned manner, and determine the first power coefficient r(n) according to the first frequency domain power loss amount. In addition, the UE determines the third power coefficient r1(n) according to the frequency occupied by the sub-band, so that the UE can determine the transmission power of the first signal according to formula 10.

[0122] Please refer to FIG. 9, which is a schematic diagram of an application scenario of an embodiment of the present application. FIG. 9 takes the first power coefficient satisfying formula 8 as an example, and takes the signal sent by the UE as SRS as an example. FIG. 9 includes UE1, UE2 and a network device, and UE1 and UE2 can both send SRS to the network device. Among them, UE1 and UE2 can be located in the same cell or different cells. The SRS (denoted as s1(n)) sent by UE1 can reach the network device through the direct path between UE1 and the network device, or can reach the network device through the reflection of the RIS; the SRS (denoted as s2(n)) sent by UE2 can reach the network device through the direct path between UE2 and the network device. UE1 can determine the transmission power of s1(n) according to the scheme provided by the embodiments of the present application, for example, determine the transmission power of s1(n) according to the first power coefficient and the third power coefficient; UE2 can not determine the transmission power of s2(n) according to the scheme provided by the embodiments of the present application, for example, does not determine the transmission power of s2(n) according to the first power coefficient and / or the third power coefficient, but determines the transmission power of s2(n) according to the existing power control formula. Among them, since UE1 determines the transmission power of s1(n) according to the first power coefficient and the third power coefficient, and since the first power coefficient and the third power coefficient are both cosine windows, therefore, s1(n) sent by UE1 through the direct path and s2(n) sent by UE2 can have good orthogonality.

[0123] S602, the UE sends the first signal. Correspondingly, the network device receives the first signal.

[0124] After the UE determines the transmission power of the first signal, the UE can transmit the first signal according to the transmission power, and the network device can receive the first signal. The first signal can be used for communication and / or positioning. If the first signal is used for communication, the first signal can include communication data. If the first signal is used for positioning, the network device can position the UE according to the first signal. Details of the positioning process are not described herein.

[0125] The first signal transmitted by the UE can reach the network device after being reflected by the first device. Optionally, the network device can further transmit second information to the first device, where the second information can indicate a weight value of the first device for reflecting the first signal. Taking the first device as an RIS for example, one weight value can include a set of RIS phases. The weight value is usually represented as a vector, and the number of elements included in the vector is equal to the number of reflection units of the RIS (for example, the electromagnetic units included in the RIS can also be referred to as reflection units). In general, each weight value of the RIS corresponds to an incidence and reflection relationship of a signal at the RIS. In order to set the weight value of the RIS to match the network device and the UE, one method for selecting the weight value can include that the network device aligns the RIS, and transmits a plurality of downlink reference signals (for example, channel state information reference signals (CSI-RSs)) on a plurality of time domain symbols; the network device instructs the RIS to constantly switch the weight value on the time domain symbols; the UE receives the downlink reference signals reflected by the RIS, measures the downlink reference signals, and reports the best measurement result (or reports all measurement results), where the measurement result can include a reference signal receiving power (RSRP) and a CSI-RS resource indicator (CRI); and the network device determines the corresponding weight value (for example, the network device determines the weight value corresponding to the best measurement result) according to the measurement result reported by the UE, and instructs the RIS to use the weight value, for example, the network device can transmit an index and / or a CRI of the weight value to the RIS, so that the RIS can reflect signals between the network device and the UE according to the weight value.

[0126] In the embodiments of the present application, the transmission power of the first signal can be determined according to the first power coefficient, and the first power coefficient is related to the frequency domain power of the first signal after being reflected by the first device. For example, the first power coefficient can compensate or reduce the amount of loss of the frequency domain power of the first signal after being reflected by the first device. Therefore, the scheme provided in the embodiments of the present application can compensate or reduce the loss of the frequency domain power of the signal after being reflected by the first device, which is beneficial to improve the quality of the received signal.

[0127] FIG. 10 shows a structural schematic diagram of a communication apparatus provided in an embodiment of the present application. The communication apparatus 1000 can be the UE or the circuitry of the UE in the embodiment shown in FIG. 6, and is configured to implement the method corresponding to the UE in the method embodiments described above. Alternatively, the communication apparatus 1000 can be the network device or the circuitry of the network device in the embodiment shown in FIG. 6, and is configured to implement the method corresponding to the network device in the method embodiments described above. For example, the circuitry can be a chip system.

[0128] The communication apparatus 1000 includes at least one processor 1001. The processor 1001 can be configured to perform internal processing of the apparatus, and implement certain control processing functions. Optionally, the processor 1001 includes instructions. Optionally, the processor 1001 can store data. Optionally, different processors can be independent devices, can be located at different physical locations, and can be located on different integrated circuits. Alternatively, different processors can be integrated in one or more processors, for example, integrated on one or more integrated circuits.

[0129] Optionally, the communication apparatus 1000 includes one or more memories 1003 configured to store instructions. Optionally, the memories 1003 can also store data. The processor and the memory can be separately provided, or integrated together.

[0130] Optionally, the communication apparatus 1000 includes a communication line 1002 and at least one communication interface 1004. Since the memory 1003, the communication line 1002 and the communication interface 1004 are optional, they are all shown in dashed lines in FIG. 10.

[0131] Optionally, the communication apparatus 1000 can further include a transceiver and / or an antenna. The transceiver can be configured to send information to other apparatuses or receive information from other apparatuses. The transceiver can be referred to as a transceiver, a transceiving circuit, an input / output interface, etc., and is configured to realize the transceiving function of the communication apparatus 1000 through the antenna. Optionally, the transceiver includes a transmitter and a receiver. For example, the transmitter can be configured to generate a radio frequency signal from a baseband signal, and the receiver can be configured to convert a radio frequency signal into a baseband signal.

[0132] The processor 1001 can include a general central processing unit (CPU), a microprocessor, an application specific integrated circuit (ASIC), or one or more integrated circuits configured to control execution of programs of the embodiments of the present application.

[0133] The communication line 1002 can include a path for transmitting information between the above-mentioned components.

[0134] The communication interface 1004 can be used to communicate with other devices or communication networks, such as an Ethernet, a radio access network (RAN), a wireless local area network (WLAN), a wired access network, etc., using any transceiver-like mechanism.

[0135] The memory 1003 can be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type of dynamic storage device that can store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disk storage, a magnetic disk storage or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to this. The memory 1003 can exist independently, and be connected to the processor 1001 through the communication line 1002. Alternatively, the memory 1003 can be integrated with the processor 1001.

[0136] The memory 1003 is configured to store computer-executed instructions for implementing the solutions of the present application, and the processor 1001 is configured to control the execution. The processor 1001 is configured to execute the computer-executed instructions stored in the memory 1003, so as to implement the steps performed by the UE or the network device in the embodiments shown in FIG. 6.

[0137] Optionally, the computer-executed instructions in the embodiments of the present application can also be referred to as application program codes, and the embodiments of the present application are not limited in this regard.

[0138] In a specific implementation, as an embodiment, the processor 1001 can include one or more CPUs, such as CPU0 and CPU1 in FIG. 10.

[0139] In a specific implementation, as an example, the communication apparatus 1000 can include multiple processors, such as the processor 1001 and the processor 1005 in FIG. 10. Each of the processors can be a single-CPU processor or a multi-CPU processor. The processor herein can refer to one or more devices, circuits, and / or processing cores for processing data (for example, computer program instructions).

[0140] When the apparatus shown in FIG. 10 is a chip, for example, a chip of a UE or a chip of a network device, the chip includes the processor 1001 (and can also include the processor 1005), the communication line 1002, and the communication interface 1004, and optionally, the memory 1003. Specifically, the communication interface 1004 can be an input interface, a pin, or a circuit, etc. The memory 1003 can be a register, a cache, etc. The processor 1001 and the processor 1005 can be a general-purpose CPU, a microprocessor, an ASIC, or one or more integrated circuits for controlling execution of a program for controlling the communication method of any of the above embodiments.

[0141] The embodiments of the present application can divide the functions of the apparatus according to the above method examples, for example, each function module can be divided according to each function, or two or more functions can be integrated into one processing module. The above integrated module can be realized in the form of hardware or in the form of a software function module. It should be noted that the division of the modules in the embodiments of the present application is illustrative, and is only a logical function division. When each function module is divided according to each function, for example, FIG. 11 is a schematic diagram of an apparatus 1100, which can be a UE or a network device involved in the above method embodiments, or a chip in the UE or a chip in the network device. The apparatus 1100 includes a processing unit 1102 and a transceiver unit 1101.

[0142] It should be understood that the apparatus 1100 can be used to implement the steps performed by the UE or the network device in the communication method of the embodiments of the present application, and the related features can refer to the above embodiment shown in FIG. 6, which will not be described here.

[0143] Optionally, the functions / implementation processes of the transceiver unit 1101 and the processing unit 1102 in FIG. 11 can be realized by the processor 1001 in FIG. 10 calling computer execution instructions stored in the memory 1003. Alternatively, the functions / implementation processes of the processing unit 1102 in FIG. 11 can be realized by the processor 1001 in FIG. 10 calling computer execution instructions stored in the memory 1003, and the functions / implementation processes of the transceiver unit 1101 in FIG. 11 can be realized by the communication interface 1004 in FIG. 10.

[0144] Optionally, when the apparatus 1100 is a chip or circuit, the functions / implementation processes of the transceiver unit 1101 can also be implemented through pins or circuits, etc. Optionally, the transceiver unit 1101 can include a sending unit and / or a receiving unit, the sending unit is used to implement the sending function, and the receiving unit is used to implement the receiving function; or the transceiver unit 1101 can be an integrated module, which can implement the sending function and / or the receiving function. Optionally, the transceiver unit 1101 can be implemented through a transceiver.

[0145] The present application also provides a computer readable storage medium, which stores computer programs or instructions, when the computer programs or instructions are executed, the method executed by the UE or the network device in the foregoing method embodiments is implemented. Thus, the functions described in the above embodiments can be implemented in the form of software function units and sold or used as independent products. Based on such understanding, the technical solutions of the present application can be embodied in the form of software product in essence or the part that contributes or the part of the technical solutions. The computer software product is stored in a storage medium, and includes a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in the embodiments of the present application. The storage medium includes a U disk, a mobile hard disk, a ROM, a RAM, a magnetic disk or an optical disk, and various storage program codes.

[0146] The present application also provides a computer program product, which includes computer program codes, when the computer program codes are executed on a computer, the computer executes the method executed by the UE or the network device in any of the foregoing method embodiments.

[0147] The embodiments of the present application also provide a processing apparatus, which includes a processor and an interface; the processor is used to execute the method executed by the UE or the network device related to any of the foregoing method embodiments.

[0148] In the embodiments described above, all or some of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or some of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded into and executed by a computer, all or some of the procedures or functions described in the embodiments of the present application are performed. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions can be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be transmitted from a website, a computer, a server or a data center to another website, computer, server or data center through a wired (for example, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (for example, infrared, wireless, microwave, etc.) manner. 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. integrated with one or more available media sets. The available media can be a magnetic medium (for example, floppy disk, hard disk, magnetic tape), an optical medium (for example, DVD), or a semiconductor medium (for example, solid state disk (SSD)) and the like.

[0149] The various illustrative logical blocks, modules, circuits, and algorithms described in connection with the embodiments disclosed herein can be implemented or performed by a general purpose processor, a digital signal processor (DSP), an ASIC, a field-programmable gate array (FPGA), or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the described functions. The general purpose processor can be a microprocessor, optionally, the general purpose processor can also be any conventional processor, controller, microcontroller, or state machine. The processor can also be implemented by a combination of computing devices, such as a digital signal processor and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other similar configuration.

[0150] The steps of methods or algorithms described in the embodiments of the present application can be directly embedded in hardware, a software unit executed by a processor, or a combination of the two. The software unit can be stored in a RAM, a flash memory, a ROM, an erasable programmable read-only memory (EPROM), an EEPROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium in the art. The storage medium can be connected to the processor, so that the processor can read information from the storage medium and write information to the storage medium. Alternatively, the storage medium can be integrated into the processor. The processor and the storage medium can be located in an ASIC, which can be located in the terminal device. Alternatively, the processor and the storage medium can also be located in different components of the terminal device.

[0151] These computer program instructions can also be loaded onto a computer or other programmable data processing device to cause a series of operations to be performed on the computer or other programmable data processing device to generate a computer implemented process, so that the instructions executed on the computer or other programmable data processing device provide steps for implementing the functions specified in one or more flows of the flowchart and / or one or more blocks of the block diagram.

[0152] The contents of various embodiments of the present application can be mutually referred to, and the terms and / or descriptions between different embodiments are consistent and can be mutually referred to 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.

[0153] It can be understood that, in the embodiments of the present application, the UE and / or the network device can perform part or all of the steps in the embodiments of the present application, and these steps or operations are only examples, and other operations or variations of various operations can also be performed in the embodiments of the present application. In addition, each step can be performed in a different order from that presented in the embodiments of the present application, and it is possible that not all operations in the embodiments of the present application are performed.

Claims

1. A communication method characterized by comprising: The method comprises: determining a first power coefficient, wherein the first power coefficient is related to the frequency domain power of the first signal after being reflected by the first device; transmitting the first signal, the transmission power of the first signal being determined according to the first power coefficient.

2. The method of claim 1, wherein, The first power coefficient comprises at least one power coefficient of at least one resource unit, the at least one resource unit being part or all of the resource units occupied by the first signal.

3. The method according to claim 1 or 2, characterized in that, Before determining the first power coefficient, the method further comprises: receiving first information, the first information being used to determine the first power coefficient; wherein, the first information is used to indicate one or more of the horizontal incidence angle, the horizontal exit angle, the vertical incidence angle, or the vertical exit angle of the first signal at the first device; or, the first information is used to indicate the amount of frequency domain power loss of the first signal after being reflected by the first device at a first frequency, the first frequency being a non-central frequency of the first signal.

4. The method of claim 3, wherein, The first signal is transmitted in a sub-band, and the first information is further used to indicate the central frequency of the full band.

5. The method according to claim 3 or 4, characterized in that, Determining the first power coefficient comprises: determining a first frequency domain power loss according to the first information, the first frequency domain power loss being the frequency domain power loss of the first signal at at least one frequency after being reflected by the first device; determining the first power coefficient according to the first frequency domain power loss.

6. The method of claim 5, wherein, The first frequency domain power loss amount satisfies the following relationship: Loss(n) = Π θ∈Θ |a(θ,f(n))a H (θ,f c )| 2 ; wherein Loss(n) represents a frequency-domain power loss amount of the first signal at frequency f(n) after being reflected by the first device, ∏ X x represents a continuous multiplication of each element x in set X, |x| represents an absolute value of x, a(θ,f(n)) represents a phase rotation vector adopted by the first device when receiving or reflecting the first signal at frequency f(n), a H (θ,f c ) represents a conjugate transpose of the phase rotation vector a c (θ,f ) adopted by the first device when receiving or reflecting the first signal at frequency f . Set Θ includes one or more of a horizontal incidence angle, a horizontal exit angle, a vertical incidence angle, or a vertical exit angle of the first signal at the first device.

7. The method according to claim 5 or 6, characterized in that, The first power coefficient comprises at least one power coefficient, the at least one power coefficient being used to compensate the transmission power of the first signal at at least one frequency, wherein, the average of the at least one power coefficient is 1; or, a second power coefficient in the at least one power coefficient is 1, and the remaining power coefficients in the at least one power coefficient are greater than 1, the second power coefficient being the power coefficient corresponding to the central frequency in the at least one frequency.

8. The method according to any one of claims 5 to 7, characterized in that, The first power coefficient satisfies the following relationship: r(n) = βLoss -1 (n); Wherein, r(n) represents the first power coefficient, β represents a power normalization factor, and Loss(n) represents the frequency domain power loss of the first signal at frequency f(n) after being reflected by the first device.

9. The method according to any one of claims 5 to 7, characterized in that, The first signal is transmitted in a sub-band, and the transmission power of the first signal is determined according to the first power coefficient and a third power coefficient, the third power coefficient being a cosine function.

10. The method of claim 9, wherein, The cosine function is a Hamming window or a Hann window.

11. The method according to any one of claims 5 to 7, 9 to 10, characterized in that, The first power coefficient satisfies the following relationship: wherein r(n) represents the first power coefficient, β represents a power normalization factor, and η represents a frequency domain power loss amount of the first signal after being reflected by the first device at a second frequency, wherein the second frequency represents a lowest frequency of the first signal, f c represents a center frequency of the first signal, and n represents a frequency index of the first signal.

12. The method according to any one of claims 1 to 11, characterized in that, The first signal is used for positioning.

13. A communication method characterized by comprising: The method comprises: transmitting first information, the first information being used to determine a first power coefficient, wherein the first power coefficient is related to the frequency domain power of the first signal after being reflected by the first device; receiving the first signal, the transmission power of the first signal being determined according to the first power coefficient.

14. The method of claim 13, wherein, The first power coefficient comprises at least one power coefficient of at least one resource unit, the at least one resource unit being part or all of the resource units occupied by the first signal.

15. The method of claim 13 or 14, wherein, the first information is used to indicate one or more of the horizontal incidence angle, the horizontal exit angle, the vertical incidence angle, or the vertical exit angle of the first signal at the first device; or, the first information is used to indicate the amount of frequency domain power loss of the first signal after being reflected by the first device at a first frequency, the first frequency being a non-central frequency of the first signal. The first information is used to indicate a frequency domain power loss amount of the first signal after being reflected by the first device at a first frequency, the first frequency being a non-center frequency of the first signal.

16. The method of claim 15, wherein, The first signal is transmitted in a sub-band, wherein, The first information is further used to indicate a center frequency of a full band; or A frequency corresponding to a steering vector is a center frequency of the sub-band, the steering vector being used to receive the first signal.

17. The method according to any one of claims 13 to 16, characterized in that, The method further comprises: sending second information to the first device, the second information indicating a weight value used by the first device to reflect the first signal.

18. The method according to any one of claims 13 to 17, characterized in that, The first signal is used for positioning.

19. A communications device, characterized by The communication device comprises a module for performing the method of any one of claims 1-12, or a module for performing the method of any one of claims 13-18.

20. A communications device, characterized by The communication device comprises a processor configured to perform the method of any one of claims 1-12, or perform the method of any one of claims 13-18.

21. A computer-readable storage medium, characterized in that, The computer readable storage medium is configured to store a computer program which, when executed on a computer, causes the method of any one of claims 1-12 to be performed, or causes the method of any one of claims 13-18 to be performed.

22. A computer program product, characterised in that, The computer program product comprises a computer program which, when executed on a computer, causes the computer to perform the method of any one of claims 1-12, or causes the computer to perform the method of any one of claims 13-18.

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