Communication method and communication apparatus

Abstract

A communication method and a communication apparatus, which are applied to the technical field of communications. The method comprises: a terminal device sends first indication information, and correspondingly a network device receives the first indication information, the first indication information being used for indicating power backoff information when the terminal device transmits a PUSCH; and the network device sends second indication information, and correspondingly the terminal device receives the second indication information, the second indication information being used for indicating expected transmit power of a reference signal, and the expected transmit power being related to the power backoff information. The present application can acquire channel information matched with PUSCHs.

Description

Communication method and communication apparatus

[0001] This application claims priority to the Chinese patent application No. 202410734362.7, filed on June 6, 2024, with the State Intellectual Property Office of China, and entitled "Communication method and communication apparatus", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

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

[0003] In a wireless communication system, a terminal device can transmit uplink data to a network device based on a physical uplink shared channel (PUSCH). In order to meet the error vector magnitude (EVM) requirement, the terminal device actively reduces the transmission power of the uplink data (i.e., the PUSCH) when transmitting the uplink data, which can be referred to as power backoff.

[0004] Generally, the network device can perform channel measurement based on the SRS to obtain channel information, and configure the parameters (e.g., uplink encoding matrix, weight, number of streams, etc.) of the uplink data (i.e., the PUSCH) transmission based on the channel information.

[0005] However, the terminal device performs power backoff when transmitting the PUSCH, but does not perform power backoff when transmitting the SRS, which can cause the channel information measured based on the SRS to be mismatched with the PUSCH. SUMMARY

[0006] Embodiments of the present application provide a communication method and a communication apparatus, which can obtain channel information matched with the PUSCH.

[0007] In a first aspect, an embodiment of the present application provides a communication method, which can be applied to a terminal side, for example, a terminal device or a communication module in the terminal device, or a circuit or chip responsible for communication function in the terminal device (such as a Modem chip, also known as a baseband chip, or a System on Chip (SoC) chip or a System in Package (SIP chip) containing a modem core). Taking the case of applying the method to a terminal device, in the method, the terminal device sends first indication information, which is used to indicate power backoff information when the terminal device transmits a physical uplink shared channel (PUSCH); and receives second indication information, which indicates an expected transmission power of a reference signal, the expected transmission power being related to the power backoff information.

[0008] In an embodiment of the present application, the reference signal can be used for channel measurement or channel estimation, for example, a network device can obtain channel information based on the reference signal to configure transmission parameters of the PUSCH. The power backoff information is used to indicate the amount of reduction of the transmission power of uplink data when the terminal device transmits the PUSCH (i.e., uplink data). The terminal device can report the power backoff information to the network device, and the network device determines the transmission power of the reference signal based on the power backoff information, so that the channel information obtained based on the reference signal can match the PUSCH.

[0009] In combination with the first aspect, in a possible implementation manner, the power backoff information includes at least one power backoff amount, and the at least one power backoff amount respectively corresponds to at least one modulation order.

[0010] In an embodiment of the present application, the power backoff amount can also be referred to as a maximum power reduction (MPR) or a power backoff threshold or an MPR threshold. The at least one power backoff amount respectively corresponds to at least one modulation order, or in other words, the at least one power backoff amount respectively corresponds to at least one modulation mode. The greater the corresponding modulation order is, the greater the power backoff amount is. The terminal device reports the power backoff amount corresponding to at least one modulation order to the network device, so that the network device can indicate the transmission power of the reference signal to the terminal device in combination with the modulation order, so that the reference signal can better match the PUSCH.

[0011] In combination with the first aspect, in a possible implementation manner, the expected transmission power is related to a first power backoff amount, a path loss between the terminal device and the network device, and an expected reception power of the reference signal, and the first power backoff amount is a power backoff amount that matches a modulation order supported by the terminal device in the at least one power backoff amount.

[0012] In the embodiments of the present application, the path loss between the terminal device and the network device can be determined by the uplink signal sent by the terminal device, and the path loss can also be referred to as uplink path loss. The network device can determine the transmission power of the reference signal based on the uplink path loss, the expected received power, and the power backoff amount corresponding to the modulation order supported by the terminal device, so that the transmission of the reference signal is more in line with the channel environment of the terminal device, thereby enabling more accurate channel information to be obtained based on the reference signal.

[0013] With reference to the first aspect, in a possible implementation manner, the expected transmission power satisfies: P=P0+PL-PR.

[0014] Wherein, the P represents the expected transmission power, the P0 represents the expected received power, the PL represents the path loss, and the PR represents the first power backoff amount.

[0015] With reference to the first aspect, in a possible implementation manner, the second indication information indicating the expected transmission power of the reference signal includes: the second indication information includes a power spectral density of the reference signal, and the power spectral density indicates the power of the reference signal per resource unit.

[0016] The method further includes: transmitting the reference signal based on the power spectral density.

[0017] In the embodiments of the present application, the resource unit includes any one of megahertz, resource block (RB), resource element (RE), and subcarrier. The network device can indicate the transmission power of the reference signal by indicating the power spectral density, and the terminal device transmits the reference signal based on the power spectral density, so that the network device can perform channel measurement on the power spectral density and the reference signal to obtain more accurate channel information.

[0018] With reference to the first aspect, in a possible implementation manner, the transmission power of the reference signal is determined by the power spectral density and the transmission resource of the reference signal.

[0019] With reference to the first aspect, in a possible implementation manner, the resource unit includes megahertz, the power spectral density indicates the power of the reference signal per megahertz, and the transmission power of the reference signal satisfies: P RS,c (i) = min{P CMAX,c (i), 10log 10 (M RS,c (i)·PSD RS,c (i))

[0020] Wherein, the P RS,c(i) indicates a transmission power of the reference signal, the P CMAX,c (i) indicates a maximum transmission power of the terminal device, the M RS,c (i) indicates a bandwidth corresponding to the transmission resource, the PSD RS,c (i) indicates the power spectral density.

[0021] With reference to the first aspect, in a possible implementation manner, the resource unit includes a resource block (RB), and the power spectral density indicates a power of the reference signal on each RB, and the transmission power of the reference signal satisfies: P RS,c (i) = min{P CMAX,c (i), 10 log 10 (M RS,RB (i) · E pRB )

[0022] wherein the P RS,c (i) indicates the transmission power of the reference signal, the P CMAX,c (i) indicates the maximum transmission power of the terminal device, the M RS,RB (i) indicates a number of RBs contained in the transmission resource, and the E pRB indicates the power spectral density.

[0023] With reference to the first aspect, in a possible implementation manner, the resource unit includes a resource element (RE), and the power spectral density indicates a power of the reference signal on each RE, and the transmission power of the reference signal satisfies: P RS,c (i) = min{P CMAX,c (i), 10 log 10 (M RS,RB (i) · E pRE · N RE )

[0024] wherein the P RS,c (i) indicates the transmission power of the reference signal, the P CMAX,c (i) indicates the maximum transmission power of the terminal device, the M RS,RB (i) indicates a number of RBs contained in the transmission resource of the reference signal, and the E pRE indicates the power spectral density, and the N RE indicates a number of REs occupied by the reference signal in one RB.

[0025] In a second aspect, an embodiment of the present application provides a communication method, which can be applied to a network side, for example, a network device or a component (for example, a circuit, a chip or a chip system, etc.) in the network device, in the case of the method being applied to the network device, in the method, the network device receives first indication information, the first indication information is used to indicate power backoff information when a terminal device transmits a physical uplink shared channel (PUSCH); and the network device sends second indication information, the second indication information indicates expected transmission power of a reference signal, and the expected transmission power is related to the power backoff information.

[0026] With reference to the first aspect, in a possible implementation manner, the power backoff information includes at least one power backoff amount, and the at least one power backoff amount respectively corresponds to at least one modulation order.

[0027] With reference to the second aspect, in a possible implementation manner, the expected transmission power is related to a first power backoff amount, a path loss between the terminal device and the network device, and expected reception power of the reference signal, and the first power backoff amount is a power backoff amount in the at least one power backoff amount that matches a modulation order supported by the terminal device.

[0028] With reference to the second aspect, in a possible implementation manner, the expected transmission power satisfies: P=P0+PL-PR.

[0029] Wherein, the P represents the expected transmission power, the P0 represents the expected reception power, the PL represents the path loss, and the PR represents the first power backoff amount.

[0030] With reference to the second aspect, in a possible implementation manner, the second indication information indicating the expected transmission power of the reference signal includes that the second indication information includes a power spectral density of the reference signal, and the power spectral density indicates power of the reference signal per resource unit.

[0031] The method further includes: transmitting the reference signal based on the power spectral density.

[0032] With reference to the second aspect, in a possible implementation manner, the transmission power of the reference signal is determined by the power spectral density and transmission resources of the reference signal.

[0033] With reference to the second aspect, in a possible implementation manner, the resource unit includes megahertz, the power spectral density indicates power of the reference signal per megahertz, and the transmission power of the reference signal satisfies: P RS,c (i) = min{P CMAX,c (i), 10log 10 (M RS,c (i)·PSDRS,c (i))

[0034] wherein the P RS,c (i) represents a transmission power of the reference signal, the P CMAX,c (i) represents a maximum transmission power of the terminal device, the M RS,c (i) represents a bandwidth corresponding to the transmission resource, the PSD RS,c (i) represents the power spectral density.

[0035] With reference to the second aspect, in a possible implementation manner, the resource unit includes a resource block (RB), the power spectral density indicates a power of the reference signal per RB, and the transmission power of the reference signal satisfies: P RS,c (i) = min{P CMAX,c (i), 10log 10 (M RS,RB (i) · E pRB )

[0036] wherein the P RS,c (i) represents a transmission power of the reference signal, the P CMAX,c (i) represents a maximum transmission power of the terminal device, the M RS,RB (i) represents a number of RBs contained in the transmission resource, and the E pRB represents the power spectral density.

[0037] With reference to the second aspect, in a possible implementation manner, the resource unit includes a resource element (RE), the power spectral density indicates a power of the reference signal per RE, and the transmission power of the reference signal satisfies: P RS,c (i) = min{P CMAX,c (i), 10log 10 (M RS,RB (i) · E pRE · N RE )

[0038] wherein the P RS,c (i) represents a transmission power of the reference signal, the P CMAX,c (i) represents a maximum transmission power of the terminal device, the M RS,RB (i) represents a number of RBs contained in the transmission resource of the reference signal, the E pRE represents the power spectral density, and the N RE represents a number of REs occupied by the reference signal in one RB.

[0039] In a third aspect, the present application provides a communication apparatus, which has the functions of the first aspect, e.g., the communication apparatus includes modules or units or means for performing the operations of the first aspect, which can be implemented in software, or in hardware, or in a combination of software and hardware.

[0040] In a fourth aspect, the present application provides a communication apparatus, which has the functions of the second aspect, e.g., the communication apparatus includes modules or units or means for performing the operations of the second aspect, which can be implemented in software, or in hardware, or in a combination of software and hardware.

[0041] In a fifth aspect, the present application provides a communication apparatus, which includes a memory and one or more processors. The memory is configured to store part or all of the necessary computer programs or instructions for implementing the functions of the first aspect. The one or more processors are configured to execute the computer programs or instructions, which, when executed, cause the communication apparatus to implement the method in any possible implementation of the first aspect.

[0042] In a possible design, the communication apparatus can further include an interface circuit, and the processor can be configured to communicate with other apparatuses or components through the interface circuit.

[0043] In a possible design, the communication apparatus can further include the memory.

[0044] The communication apparatus can be a terminal device, or a communication module in a terminal device, or a chip responsible for communication functions in a terminal device, such as a Modem chip (also referred to as a baseband chip) or a SoC or SIP chip containing a modem module.

[0045] In a sixth aspect, the present application provides a communication apparatus, which includes a memory and one or more processors. The memory is configured to store part or all of the necessary computer programs or instructions for implementing the functions of the second aspect. The one or more processors are configured to execute the computer programs or instructions, which, when executed, cause the communication apparatus to implement the method in any possible implementation of the second aspect.

[0046] In a seventh aspect, an embodiment of the present application provides a communication apparatus, which comprises one or more processors configured to execute computer programs or instructions to perform the method in any possible implementation of the first aspect or the second aspect. Optionally, the apparatus further comprises a memory configured to store the computer programs or instructions, and the one or more processors are configured to execute the computer programs or instructions stored in the memory. Optionally, the apparatus further comprises a communication interface coupled to the processor, and the communication interface is configured to input the computer programs or instructions into the processor, or output information in the processor.

[0047] In an implementation, the apparatus is a communication device (e.g., a terminal device, or a network device).

[0048] In another implementation, the apparatus is a chip, a chip system, or a circuit, or a communication module for a communication device (e.g., a terminal device, or a network device).

[0049] In an eighth aspect, an embodiment of the present application provides a processor configured to perform the method provided in the first aspect or the second aspect.

[0050] For the sending and obtaining / receiving operations of the processor, if there is no special description, or if it does not contradict the actual role or the inherent logic in the related description, it can be understood as the output and receiving, input operations of the processor, or the sending and receiving operations performed by the radio frequency circuit and the antenna, and the present application does not limit this.

[0051] In a ninth aspect, the present application provides a communication system, which comprises a terminal apparatus and a network device, the terminal apparatus is configured to perform the method shown in the first aspect or any possible implementation of the first aspect, and the network device is configured to perform the method shown in the second aspect or any possible implementation of the second aspect.

[0052] In a tenth aspect, the present application provides a computer readable storage medium, which stores computer readable instructions, when a computer reads and executes the computer readable instructions, the computer is caused to perform the method in any possible implementation of the first aspect to the second aspect.

[0053] In an eleventh aspect, the present application provides a computer program product, when a computer reads and executes the computer program product, the computer is caused to perform the method in any possible implementation of the first aspect to the second aspect.

[0054] In a twelfth aspect, the present application provides a chip, which comprises a processor and a communication interface, the processor reads instructions on a memory through the communication interface, and performs the method provided in any implementation of the first aspect or the second aspect.

[0055] Optionally, the chip is a Modem chip, also known as a baseband chip, or a system on chip (SoC) chip or a system in package (SIP) chip containing a modem core.

[0056] Optionally, as an implementation manner, the chip further comprises a memory, and the memory stores a computer program or instructions; the processor is configured to execute the computer program or instructions on the memory, and when the computer program or instructions are executed, the processor is configured to execute the method provided by any of the implementation manners of the first aspect or the second aspect. BRIEF DESCRIPTION OF DRAWINGS

[0057] The following describes the drawings related to the embodiments of the present application.

[0058] FIG. 1A is a structural schematic diagram of a communication system provided by an embodiment of the present application;

[0059] FIG. 1B is a structural schematic diagram of another communication system provided by an embodiment of the present application;

[0060] FIG. 2 is a flow schematic diagram of a communication method provided by an embodiment of the present application;

[0061] FIG. 3 is a structural schematic diagram of a communication device provided by an embodiment of the present application;

[0062] FIG. 4 is a structural schematic diagram of another communication device provided by an embodiment of the present application;

[0063] FIG. 5 is a structural schematic diagram of a chip system provided by an embodiment of the present application. DETAILED DESCRIPTION

[0064] The terms “first” and “second” and the like in the specification of the present application, claims, and drawings are only used to distinguish different objects, and are not used to limit the order, time sequence, priority, or importance of the plurality of objects. In the embodiments of the present application, “plurality” means two or more. In addition, the terms “include” and “have” and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device, etc. that includes a series of steps or units is not limited to the listed steps or units, but optionally includes other steps or units not listed, etc. or optionally includes other steps or units inherent to the process, method, product, or device, etc. In addition, the character “ / ”, unless otherwise specified, generally represents an “or” relationship between the associated objects before and after.

[0065] Reference to“an embodiment” herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase“in an embodiment” in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all referring to a common set of embodiments, although they can. Those skilled in the art will appreciate that the embodiments described herein can be combined with other embodiments in various ways.

[0066] It should be understood that, in this application,“at least one” means one or more,“multiple” means two or more,“at least two” means two or three and three or more,“and / or” is used to describe the relationship between associated objects, which means that there can be three relationships, for example,“A and / or B” can mean: only A, only B, and A and B exist at the same time, where A and B can be singular or plural. The character“ / ” generally represents an“or” relationship between the associated objects. “At least one of the following” or the like means any combination of these items, including any combination of single or multiple items. For example, at least one of a, b or c can mean: a, b, c, “a and b”, “a and c”, “b and c”, or “a and b and c”, where a, b, and c can be single or multiple.

[0067] The technical solutions in the embodiments of the application will be described below in conjunction with the drawings in the embodiments of the application. The technical solutions in the embodiments of the application can be applied to various communication systems, such as universal mobile communication system (UMTS), wireless local area network (WLAN), wireless fidelity (Wi-Fi) system, 4th generation (4G) mobile communication system such as long term evolution (LTE) system, 5th generation (5G) mobile communication system such as new radio (NR) system, and future evolved communication system such as 6th generation (6G) mobile communication system, etc.

[0068] The present application will present various aspects, embodiments or features around a system that can include a plurality of devices, components, modules, etc. It should be understood and appreciated that each system can include additional devices, components, modules, etc., and / or can not include all of the devices, components, modules, etc. discussed in conjunction with the drawings. In addition, combinations of these solutions can also be used.

[0069] In addition, in the embodiments of the present application, the words "exemplary", "for example", and the like are used solely to indicate examples, instances, or illustrations, and not preference or advantageousness over another embodiment or design scheme. In fact, the word "exemplary" is used to present the concept in a concrete manner. In the embodiments of the present application, "of", "corresponding" and "corresponding" are sometimes mixed. It should be pointed out that when the difference is not emphasized, the meanings expressed are consistent.

[0070] The communication system and service scenarios described in the embodiments of the present application are for more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. Those skilled in the art can know that with the evolution of network architecture and the emergence of new service scenarios, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

[0071] As shown in FIG. 1A or FIG. 1B, the communication system provided by the embodiments of the present application can include at least one network device and at least one terminal device.

[0072] The introductions of the network device and the terminal device are as follows:

[0073] Exemplarily, the network device can be a device or module located at the network side of the above communication system and having a corresponding communication function. The network device is usually provided with a communication module, circuit or chip for executing the corresponding communication function. The network device is also configured with program instructions for executing the corresponding communication function and the corresponding program instructions.

[0074] Exemplarily, the network device in the embodiments of the present application can be a radio access network (RAN) device or a network element deployed in a RAN. For example, the network device can be a RAN device or an apparatus capable of supporting the RAN device to implement the function, such as a chip system or a combined device or component that can implement the function of an access network device, which can be installed in the RAN device. For another example, the network device can be an access point (AP) in a Wi-Fi system, such as a home gateway, a router, a server, a switch, a bridge, etc., a base station, a base station controller (BSC), a base transceiver station (BTS), a home base station, a baseband unit (BBU), a wireless relay node, a wireless backhaul node, and can also be an evolved node B (eNB) in a 4G system, or a next-generation eNB (ng-eNB) during the transition from a 4G system to a 5G system, or a next-generation base station (gNB) in a 5G system, or a RAN node implementing a (partial) function of a gNB, which can be a central unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU), etc. The CU and the DU can be separately arranged or can be included in the same network element, such as a baseband unit (BBU). The RU can be included in a radio frequency device or a radio frequency unit, such as a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH). Alternatively, the network device can also be a satellite or various forms of base stations in the future. In addition, the network device can be a macro base station, a micro base station or an indoor station, and can also be a relay node or a donor node, etc.

[0075] In some possible deployments, the network device can also be an open radio access network (O-RAN) architecture. In some examples, the CU is a logical node that hosts the radio resource control (RRC) layer, the service data adaptation protocol (SDAP) layer, the packet data convergence protocol (PDCP) layer, and other control functions of the access network device. The CU is connected to network nodes such as a core network over some interfaces, which can be an E2 interface or the like. Optionally, the CU can have some functionalities of the core network. The CU (e.g., the PDCP layer and higher layers) is connected to the DU (e.g., the radio link control (RLC) layer and lower layers) over some interfaces, which can be an Fl interface or the like. In some examples, the interfaces (e.g., the Fl interface) can provide control plane (C-Plane) and user plane (U-Plane) functionalities (e.g., interface management, system information management, UE context management, RRC message transfer, etc.). The FlAP is an application protocol for the Fl interface, which defines signaling procedures for the Fl in some examples. The Fl interface supports a control plane Fl-C and a user plane Fl-U.

[0076] In some examples, the CU can be split into a CU-CP (control unit-control plane) and a CU-UP (control unit-user plane), where the CU-CP is a logical node carrying the RRC layer and the PDCP-C (control plane part of PDCP) layer, used to implement the control plane function of the CU. The CU-CP can interact with a network element in the core network used to implement the control plane function. The network element in the core network used to implement the control plane function can be an access and mobility function network element, such as an access and mobility management function (AMF) in a 5G system. The AMF network element is used to be responsible for mobility management in a mobile network, such as location updating of a terminal device, registration of the terminal device to a network, handover of the terminal device, and the like. The CU-UP is a logical node carrying the SDAP layer and the PDCP-U (user plane part of PDCP) layer, used to implement the user plane function of the CU. The CU-UP can interact with a network element in the core network used to implement the user plane function. The network element in the core network used to implement the user plane function, for example, a user plane function (UPF) in a 5G system, is used to be responsible for forwarding and receiving data in a terminal device. The above configuration of the CU and the DU is merely an example, and the CU and the DU can be configured to have 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 the RLC layer and functions of protocol layers above the RLC layer are arranged in the CU, and the remaining functions of the RLC layer and functions of protocol layers below the RLC layer are arranged in the DU. For another example, the functions of the CU or the DU can be divided according to a service type or other system requirements, for example, according to a delay requirement. Functions that require a processing time to meet a relatively low delay requirement are arranged in the DU, and functions that do not require the processing time to meet the delay requirement are arranged in the CU.

[0077] In some examples, a DU is a logical node that hosts radio link control (RLC) layer, medium access control (MAC) layer, higher physical layer (Higher PHY) layer, and other functions. In some examples, a DU can control at least one RU. The DU is connected with the RUs through some interfaces, which can be fronthaul interfaces. In some examples, the Higher PHY layer includes parts of PHY layer processing, such as forward error correction (FEC) encoding and decoding, scrambling, modulation and demodulation, etc.

[0078] In some examples, an RU is a logical node that hosts lower physical layer (Lower PHY) and radio frequency (RF) processing. In some examples, an RU can be a 3GPP transmission reception point (TRP) or a remote radio head (RRH) or other similar functional entity. In some examples, the Low-PHY includes parts of PHY processing, such as fast Fourier transform (FFT), inverse fast Fourier transformation (IFFT), digital beamforming and filtering, etc. An RU communicates with one or more UEs through wireless links.

[0079] The DU and the RU can be co-located or not co-located. The DU and the RU exchange control plane information and user plane information through a lower-layer split CUS-Plane (LLS-CUS) interface via a fronthaul link. The LLS-CUS can include a LLS-C interface and a LLS-U interface that provide control plane (C-Plane) and user plane (U-Plane), respectively. In some examples, the control plane (C-Plane) refers to real-time control between the DU and the RU. The DU and the RU exchange management information through a LLS-M interface of the fronthaul link, and the management plane (M-Plane) refers to non-real-time management operations between the DU and the RU.

[0080] The DU and the RU can cooperate to jointly implement the functions of the PHY layer. One DU can be connected with one or more RUs. The functions of the DU and the RU can be configured in various ways according to design. For example, the DU is configured to implement baseband functions, and the RU is configured to implement radio frequency functions. For another example, the DU is configured to implement high-layer functions in the PHY layer, and the RU is configured to implement low-layer functions in the PHY layer or to implement the low-layer functions and radio frequency functions. The high-layer functions in the PHY layer can include a portion of the functions of the PHY layer that are closer to the MAC layer, and the low-layer functions in the PHY layer can include another portion of the functions of the PHY layer that are closer to the radio frequency side.

[0081] In different systems, the CU (or CU-CP and CU-UP), the DU, or the 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 O-CU (open CU), the DU can also be referred to as an O-DU, the CU-CP can also be referred to as an O-CU-CP, the CU-UP can also be referred to as an O-CU-UP, and the RU can also be referred to as an O-RU. For the convenience of description, the CU, the CU-CP, the CU-UP, the DU, and the RU are taken as examples for description in this application.

[0082] An exemplary terminal device can be a device or module with corresponding communication functions for accessing the above communication system. The terminal device can also be referred to as a user equipment (UE), a terminal, a user apparatus, an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station (MS), a remote station, a remote terminal, a mobile device, a user terminal, a terminal unit, a terminal station, a terminal apparatus, a wireless communication device, a user agent, or a user apparatus. The terminal device is usually provided with a communication module, a circuit, or a chip for performing corresponding communication functions, and is also configured with program instructions for performing corresponding communication functions.

[0083] For example, the terminal device in the embodiments of the present application can be a mobile phone, a personal digital assistant (PDA) computer, a laptop computer, a tablet computer (Pad), a drone, a computer with wireless transceiver function, a machine type communication (MTC) terminal, a virtual reality (VR) terminal, an augmented reality (AR) terminal, an internet of things (IoT) terminal, a wireless terminal in industrial control, a wireless terminal in self driving, a wireless terminal in remote medical, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home (such as game consoles, smart televisions, smart speakers, smart refrigerators and fitness equipment, etc.), a transport vehicle with wireless communication function, a communication module, a roadside unit (RSU) with terminal function.

[0084] In the communication system shown in FIG. 1A, a network device and a plurality of terminal devices (such as UE1 and UE2) are included. In the communication system, the network device can send downlink signals such as configuration information or downlink control information (DCI) to UE1 and UE2, and UE1 and UE2 can send uplink signals such as sounding reference signals (SRS) or physical uplink shared channels (PUSCH) to the network device.

[0085] In the communication system shown in FIG. 1B, a terminal device and a plurality of network devices (such as base station 1, base station 2 and base station 3 in FIG. 1B) are included. In the communication system, base station 1, base station 2 and base station 3 can simultaneously transmit data and control signaling for the UE.

[0086] Each of the above communication devices, such as the base station and the UE in FIG. 1A or FIG. 1B, can be configured with multiple antennas. The multiple antennas can include at least one transmitting antenna for transmitting signals and at least one receiving antenna for receiving signals, and the like, and embodiments of the present application are not limited in a specific structure of each communication device. Optionally, the communication system can further include a network controller, a mobile management entity, and other network entities, and embodiments of the present application are not limited thereto.

[0087] It can be understood that FIG. 1A and FIG. 1B are only simplified schematic diagrams for ease of understanding, and other possible devices can also be included in the communication system, such as wireless relay devices and wireless backhaul devices, and different functional units can also be included in each device, which are not shown in FIG. 1A and FIG. 1B. The communication between different devices involved in embodiments of the present application can mean direct communication between different devices (i.e. without the need for other devices to transfer or forward), or can mean communication between different devices through other devices (i.e. the need for other devices to transfer or forward), or can mean that the functional units inside the device communicate with other devices through another functional unit. That is, in the present application, “sending information to (a terminal)” can be understood as that the destination of the information is the terminal. It can include direct or indirect sending of information to the terminal. “Receiving information from (a terminal)” can be understood as that the source of the information is the terminal, and it can include direct or indirect receiving of information from the terminal. The information can be processed as necessary between the source and the destination of the information, such as format change, digital-to-analog conversion, amplification, filtering, and the like, but the destination can understand the valid information from the source. Similar expressions in the present application can be understood similarly, and will not be described here.

[0088] The error vector magnitude (EVM) represents the vector difference between the ideal error-free reference signal and the actual transmitted signal, and can comprehensively measure the amplitude error and phase error between the actual transmitted modulation symbol constellation point and the ideal constellation point. The higher the modulation order, the smaller the distance between the constellation points, and in order for the receiving side to correctly demodulate the transmitted modulation symbol, the corresponding EVM requirement is more stringent. The non-linear distortion of the power amplifier (PA) in the terminal radio frequency link is an important source of EVM. For a given PA, the greater the transmission power, the more serious the non-linear distortion. Therefore, in order to meet the EVM requirement of the protocol, the terminal device will actively reduce the transmission power of the uplink data (i.e. PUSCH) when transmitting uplink data, which can be referred to as power backoff. The higher the modulation order, the greater the power backoff.

[0089] In the above communication system, the terminal device can send an SRS to the network device, which is used for channel estimation, for example, the SRS is used for estimation of uplink channel quality and channel selection, or the SRS is used for calculation of the signal to interference plus noise ratio (SINR) of the uplink channel, or the SRS is used for acquisition of the uplink channel coefficient. In a time division duplex (TDD) scenario, the uplink and downlink channels have reciprocity, and the SRS can also be used to acquire the downlink channel coefficient. The uplink or downlink channel coefficient estimated by the base station according to the SRS can be used to determine the precoding matrix of the uplink or downlink, improve the transmission rate of the uplink or downlink, and increase the system capacity.

[0090] Exemplarily, four usages of SRS are defined in the protocol, which are antenna switching, codebook, non-codebook, and beam management. Among them, the codebook SRS is used for codebook-based uplink transmission, and the non-codebook SRS is used for non-codebook-based uplink transmission.

[0091] The terminal device transmits the SRS using the SRS power control adjustment state with index l on the uplink BWP b of the cell c carrier, and the transmission power of the SRS at the transmission occasion i is:

[0092] Wherein, P SRS,b,f,c (i, q s , l) represents the transmission power of the SRS, and the unit is dBm. P CMAC,f,c (i) represents the maximum transmission power configured by the terminal device, P O_SRS,b,f,c (q s ) represents the expected received power of the SRS configured by the network device for the terminal device, μ represents the subcarrier spacing, M SRS,b,f,c (i) represents the bandwidth of the SRS, α SRS,b,f,c (q s ) represents the path loss factor, PL b,f,c (q d ) represents the path loss of the downlink reference signal q d measured by the terminal device, and the unit is dB, h b,f,c (i, l) represents the closed-loop power control adjustment amount.

[0093] The network device can perform channel measurement based on the SRS, obtain channel information, and configure parameters (e.g., uplink encoding matrix, weight, number of streams, etc.) of uplink data (i.e., PUSCH) transmission based on the channel information. The terminal device performs power backoff when transmitting PUSCH, and does not perform power backoff when transmitting the reference signal, which can cause the channel information measured based on the reference signal to be mismatched with the PUSCH.

[0094] In view of this, the embodiments of the present application provide a communication method and a communication device, which can obtain channel information matched with the PUSCH. The method provided by the embodiments of the present application can be applied to the communication system shown in FIG. 1A or FIG. 1B. Alternatively, the method provided by the embodiments of the present application can be applied to a terminal device and a network device. The terminal device can be the terminal device described above, and the network device can be the network device described above.

[0095] It can be understood that the interaction schematic in the present application takes the network device and the terminal device as an example to illustrate the execution subject of the interaction schematic, but the present application does not limit the execution subject of the interaction schematic. For example, the network device in the interaction schematic can also be a chip, a chip system, or a processor supporting the network device to implement the method, and can also be a logic node, a logic module, or software capable of implementing all or part of the functions of the network device; the terminal device in the interaction schematic can also be a chip, a chip system, or a processor supporting the terminal to implement the method.

[0096] Please refer to FIG. 2, which is a flowchart of a communication method provided by the embodiments of the present application. As shown in FIG. 2, the method includes but is not limited to the following steps.

[0097] 201. The terminal device transmits first indication information, and correspondingly, the network device receives the first indication information. The first indication information is used to indicate power backoff information of the terminal device when transmitting PUSCH.

[0098] Exemplarily, in order to meet the EVM requirement, the terminal device actively reduces the transmission power of uplink data (i.e., PUSCH) when transmitting the uplink data. The power backoff information is used to indicate the reduction amount of the transmission power of the uplink data when the terminal device transmits the PUSCH (i.e., uplink data).

[0099] Exemplarily, the power backoff information can comprise at least one power backoff amount, which can also be referred to as a maximum power reduction (MPR) or a power backoff threshold or an MPR threshold. The at least one power backoff amount respectively corresponds to at least one modulation order, or in other words, the at least one power backoff amount respectively corresponds to at least one modulation mode. The greater the modulation order, the greater the corresponding power backoff amount. When the terminal device transmits the PUSCH based on a modulation order or a modulation mode corresponding to a first power backoff amount, the power of the PUSCH is reduced by an amount less than or equal to the first power backoff amount, and the first power backoff amount is one of the at least one power backoff amount. For example, the power backoff information comprises six power backoff amounts, namely MPR#1, MPR#2, MPR#3, MPR#4, MPR#5, and MPR#6, wherein MPR#1 corresponds to BPSK modulation, MPR#2 corresponds to QPSK modulation, MPR#3 corresponds to 16QAM modulation, MPR#4 corresponds to 64QAM modulation, MPR#5 corresponds to 256QAM modulation, and MPR#6 corresponds to 1024QAM modulation. The six power backoff amounts satisfy the following relationship: MPR#1≤MPR#2≤MPR#3≤MPR#4≤MPR#5≤MPR#6.

[0100] Exemplarily, the unit of the at least one power backoff amount is dB or dBm.

[0101] As an example, the first indication information further indicates the modulation order or the modulation mode corresponding to the at least one power backoff amount.

[0102] As another example, the correspondence between the at least one power backoff amount and the modulation order or the modulation mode can be determined by the relative position of the at least one power backoff amount. For example, the at least one power backoff amount is sorted in ascending order of the modulation order corresponding thereto, the first power backoff amount in the at least one power backoff amount corresponds to the smallest modulation order, and the last power backoff amount in the at least one power backoff amount corresponds to the largest modulation order. For another example, the at least one power backoff amount is sorted in descending order of the modulation order corresponding thereto.

[0103] In a possible implementation, the power backoff information of the terminal device can be predefined by a protocol, and therefore the terminal device can not send the first indication information.

[0104] 202, the network device sends second indication information, and correspondingly, the terminal device receives the second indication information. The second indication information indicates an expected transmission power of a reference signal. The expected transmission power is related to the power backoff information.

[0105] Exemplarily, after receiving the first indication information, the network device can determine the expected transmission power of the parameter signal based on the power backoff information. The reference signal can be an SRS or a pre-reference signal or a DeModulation Reference Signal (DMRS). The reference signal is used for estimation of uplink channel quality and channel selection. For example, the reference signal is used to calculate the signal to interference plus noise ratio (SINR) of the uplink channel. For another example, the reference signal is used to obtain the uplink channel coefficient. The network device indicates the expected transmission power of the reference signal through the second indication information, so that the terminal device transmits the reference signal according to the transmission power indicated by the network device.

[0106] In a possible implementation, the expected transmission power is related to the first power backoff amount, the path loss between the terminal device and the network device, and the expected reception power of the reference signal, and the first power backoff amount is a power backoff amount matched with the modulation order supported by the terminal device among the at least one power backoff amount.

[0107] Exemplarily, the modulation order supported by the terminal device can also be replaced by a "modulation mode supported by the terminal device". The modulation order supported by the terminal device can also be understood as a modulation order supported by the channel condition of the channel between the terminal device and the network device. The modulation mode supported by the terminal device can also be understood as a modulation mode supported by the channel condition of the channel between the terminal device and the network device. The first power backoff amount is a power backoff amount corresponding to the modulation mode supported by the channel condition of the channel between the terminal device and the network device, and the network device can determine the expected transmission power of the reference signal based on the first power backoff amount. For example, if the channel condition between the terminal device and the network device supports 1024QAM uplink transmission, the network device can determine the expected transmission power of the reference signal based on the power backoff amount corresponding to 1024QAM.

[0108] Exemplarily, the network device can determine the modulation order range or the modulation mode supported by the terminal device based on the channel information or the channel environment between the terminal device and the network device, and select the first power backoff amount corresponding to the modulation order range or the modulation mode supported by the terminal device from the at least one power backoff amount, and determine the expected reception power of the reference signal based on the first power backoff amount. The channel information or the channel environment between the terminal device and the network device can be measured based on other signals or channels (such as uplink signals transmitted by the terminal device in a random access process) transmitted by the terminal device.

[0109] As an example, the channel information between the network devices includes a path loss between the terminal device and the network device, the network device can determine a modulation order range or a modulation mode supported by the terminal device based on the path loss, and determine a first power backoff amount from at least one power backoff amount based on the modulation order range or the modulation mode supported by the terminal device. The network device can determine the expected transmission power of the reference signal based on the first power backoff amount, the path loss between the terminal device and the network device, and the expected reception power of the reference signal.

[0110] For example, the expected transmission power of the reference signal satisfies: P = P_0 + PL - PR

[0111] Wherein, P represents the expected transmission power of the reference signal, P_0 represents the expected reception power of the reference signal (which can be -80dBm), PL represents the path loss between the terminal device and the network device, and PR represents the first power backoff amount.

[0112] Optionally, the method shown in FIG. 2 can further include step 203.

[0113] 203. The terminal device transmits the reference signal based on the second indication information, and correspondingly, the network device receives the reference signal.

[0114] For example, the terminal device determines the transmission power of the reference signal based on the second indication information, and transmits the reference signal at the transmission power at the reference signal transmission occasion i.

[0115] In a possible implementation, the second indication information includes the expected transmission power of the reference signal. The terminal device can directly transmit the reference signal based on the expected transmission power of the reference signal.

[0116] In another possible implementation, the second indication information includes a power spectral density of the reference signal, and the power spectral density indicates the power of the reference signal per resource unit, and the resource unit includes any one of megahertz, resource block (RB), resource element (RE), and subcarrier.

[0117] For example, after the network device determines the expected transmission power of the reference signal, the network device can determine the power spectral density of the reference signal, and indicate the power spectral density to the terminal device through the second indication information, so that the terminal device can transmit the reference signal based on the power spectral density.

[0118] In this implementation, the expected transmission power of the reference signal can be indicated by the power spectral density of the reference signal. The transmission power of the reference signal is determined by the power spectral density of the reference signal and the bandwidth of the reference signal.

[0119] As an example, the resource unit is megahertz, and the second indication information includes a power spectral density (PSD) of the reference signal, i.e., the second indication information indicates the power of the reference signal per megahertz. The transmission power of the reference signal at the carrier c and the transmission occasion i satisfies: RS,c (i) = min{P CMAX,c (i), 10 log 10 (M RS,c (i) · PSD RS,c (i))

[0120] wherein, P RS,c (i) represents the transmission power of the reference signal at the transmission occasion i of the carrier c, in units of dBm or dB. P CMAX,c (i) represents the maximum transmission power of the terminal device at the transmission occasion i of the carrier c, in units of dBm or dB. M RS,c (i) represents the transmission bandwidth of the reference signal at the transmission occasion i of the carrier c, in units of MHz. PSD RS,c (i) represents the PSD of the reference signal at the transmission occasion i of the carrier c, in units of dB / MHz or dBm / MHz.

[0121] It can be understood that in this example, the resource unit can also be other frequency units such as hertz, kilohertz, etc., and here only megahertz is taken as an example.

[0122] As another example, the resource unit is RB, and the second indication information indicates the power of the reference signal per RB. The transmission power of the reference signal at the carrier c and the transmission occasion i satisfies: RS,c (i) = min{P CMAX,c (i), 10 log 10 (M RS,RB (i) · E pRB )

[0123] wherein, P RS,c (i) represents the transmission power of the reference signal at the transmission occasion i of the carrier c, in units of dBm or dB. P CMAX,c (i) represents the maximum transmission power of the terminal device at the transmission occasion i of the carrier c, in units of dBm or dB. M RS,RB (i) represents the number of RBs contained in the transmission bandwidth of the reference signal at the transmission occasion i of the carrier c. E pRB represents the power of each RB of the reference signal at the transmission occasion i of the carrier c, in units of mW / RB.

[0124] As a further example, the resource unit comprises an RE, and the second indication information indicates the power of the terminal device on each RE. The transmission power of the reference signal at the transmission occasion i of the carrier c satisfies: P RS,c (i) = min{P CMAX,c (i), 10log 10 (M RS,RB (i) · E pRE · N RE )}

[0125] wherein, P RS,c (i) represents the transmission power of the reference signal at the transmission occasion i of the carrier c, in units of dBm or dB. P CMAX,c (i) represents the maximum transmission power of the terminal device at the transmission occasion i of the carrier c, in units of dBm or dB. M RS,RB (i) represents the number of RBs contained in the transmission bandwidth of the reference signal at the transmission occasion i of the carrier c. E pRE represents the power of each RE of the reference signal at the transmission occasion i of the carrier c. N RE represents the number of REs occupied by the reference signal within one RB.

[0126] It can be understood that in the present application, “transmission power” and “emission power” can be used interchangeably.

[0127] Exemplarily, after receiving the reference signal, the network device can determine the transmission power of the reference signal based on the transmission bandwidth of the reference signal and the power of the reference signal on each resource unit. When performing channel measurement, the channel information (or channel coefficient) of the uplink channel can be obtained in combination with the transmission power of the reference signal.

[0128] Exemplarily, the network device can estimate the uplink channel coefficient and / or the uplink precoding matrix according to the reference signal. For example, the network device can determine the optimal weight and the number of streams of the terminal device for uplink transmission based on the reference signal.

[0129] Exemplarily, in a TDD scenario, the uplink channel and the downlink channel have reciprocity, and therefore, the network device can also estimate the downlink channel coefficient and / or the downlink precoding matrix based on the reference signal.

[0130] Exemplarily, in the case that the reference signal comprises SRS for codebook, the network device can configure a terminal device with a SRS resource set for codebook, one resource set comprising one or more SRS resources, and the terminal device transmits SRS according to the configuration parameters of the one or more SRS resources. The network device receives the SRS and then performs channel measurement. If the number of SRS resources is greater than one, the network device selects a SRS resource with better channel condition from the multiple SRS resources and indicates the terminal device through the SRS resource indicator (SRI) field in the DCI. The network device can also calculate the precoding matrix for uplink transmission according to the channel result measured by the SRS resource and indicate the precoding matrix to the terminal device. After receiving the indication information, the terminal device transmits the PUSCH signal according to the indicated SRS resource and precoding matrix.

[0131] Exemplarily, in the case that the reference signal comprises SRS for non-codebook, the network device can configure a terminal device with a SRS resource set for non-codebook, one resource set comprising one or more SRS resources, and the terminal device performs precoding on the SRS based on channel reciprocity according to the configuration parameters of the one or more SRS resources and the corresponding downlink reference signal measurement result, and transmits the SRS. The network device receives the SRS and then performs channel measurement to determine the optimal weight and the number of streams for the terminal device to perform uplink transmission, and indicates the terminal device through the SRI field in the DCI. After receiving the indication information for indicating the optimal weight and the number of streams, the terminal device transmits the PUSCH signal according to the SRS resource indicated by the indication information.

[0132] Exemplarily, the network device can also obtain the SINR of the reference signal, and determine the SINR of the uplink channel based on the SINR of the reference signal.

[0133] Exemplarily, the network device can also determine the uplink path loss based on the reference signal. For example, the network device indicates the expected transmission power of the reference signal through the second indication information, and determines the uplink path loss based on the expected transmission power and the received power of the reference signal. Since the transmission power of the reference signal is specified by the network device, the network device can obtain the accurate transmission power of the reference signal, and based on the transmission power of the reference signal and the received power of the reference signal, the network device can obtain a more accurate uplink path loss.

[0134] Exemplarily, the network device can also determine the modulation and coding scheme (MCS) for the terminal device to perform transmission based on the channel measurement result of the reference signal.

[0135] Optionally, the method shown in FIG. 2 can further include step 204.

[0136] 204, the network device sends third indication information, and correspondingly, the terminal device receives the third indication information, the third indication information indicating the MCS corresponding to the terminal device.

[0137] For example, the network device can determine the modulation order corresponding to the MCS based on the measurement result of the reference signal. When determining the MCS for the terminal device, the network device can select a more appropriate MCS for the terminal device based on the measurement result of the reference signal with specified transmission power.

[0138] For example, if the transmission power of the reference signal of the terminal device does not consider power backoff, there will be a large deviation between the actual transmission power spectrum of the data channel (PUSCH) and the reference signal receiving power (RSRP) of the reference signal, the modulation order of the MCS determined based on the measurement result of the reference signal will be too large, which will cause the terminal device to use a larger amount of power backoff when transmitting data signals, and further cause the actual SINR of the data signals to possibly fail to meet the demodulation threshold, affecting the actual effectiveness ratio of high-order modulation and the peak performance of the cell. In the embodiment of the present application, the network device can specify the transmission power of the reference signal for the terminal device based on the power backoff information of the terminal device, thereby avoiding the actual SINR of the data signals possibly failing to meet the demodulation threshold, and ensuring the actual effectiveness ratio of high-order modulation and the peak performance of the cell.

[0139] For example, the network device can determine the uplink loss based on the reference signal, and determine the MCS or modulation order corresponding to the terminal device based on the uplink loss. Since the uplink loss is not affected by the power backoff of the terminal device or is less affected by the power backoff of the terminal device, and the transmission power of the reference signal is specified by the network device, the network device can obtain a more accurate uplink loss. Therefore, when selecting the MCS or modulation order for the terminal device, the network device can select a more appropriate MCS or modulation order for the terminal device in combination with the uplink loss.

[0140] In the embodiment of the present application, the network device can determine the expected transmission power of the reference signal based on the power backoff information of the terminal device, and indicate the expected transmission power of the reference signal to the terminal device through the second indication information. The terminal device transmits the reference signal based on the expected transmission power of the reference signal, that is, the transmission power of the reference signal transmitted by the terminal device is related to the power backoff information, so that the terminal device can obtain channel information matching the PUSCH based on the reference signal.

[0141] The method provided by the embodiments of the present application is described above with reference to the drawings. The device provided by the embodiments of the present application is described below with reference to the drawings.

[0142] FIG. 3 shows a possible exemplary block diagram of a communication device involved in the embodiments of the present application. As shown in FIG. 3, the communication device 300 can include modules or units corresponding to the above-mentioned method embodiments. In a possible design, the communication device 300 includes a processing unit 302 and a communication unit 303. Optionally, the communication device 300 can further include a storage unit 301 for storing device program code and / or data.

[0143] In some embodiments of the present application, the communication device 300 can be a terminal-side device in the above-mentioned embodiments, for example, a terminal device or a communication module in a terminal device, or a circuit or chip responsible for communication functions in a terminal device.

[0144] For example, in an embodiment, the communication unit 303 is configured to send first indication information, and receive second indication information.

[0145] Optionally, the communication unit 303 is further configured to send a reference signal.

[0146] Optionally, the communication unit 303 is further configured to receive third indication information.

[0147] Optionally, the processing unit 302 is configured to determine the first indication information.

[0148] It can be understood that the specific description of the first indication information, the second indication information, the third indication information, the reference signal, and the like can refer to the method embodiments (as shown in FIG. 2) described above, which will not be described in detail here.

[0149] In a possible design, when the communication device 300 is a terminal or a communication module in a terminal, the function of the processing unit 302 can be implemented by one or more processors. Specifically, the processor can include a Modem chip, or a System on Chip (SoC) chip or a SIP chip containing a Modem core. The function of the communication unit 303 can be implemented by a transceiver circuit.

[0150] In a possible design, when the communication device 300 is a circuit or chip responsible for communication functions in a terminal, such as a Modem chip or a System on Chip (SoC) chip or a SIP chip containing a Modem core, the function of the processing unit 302 can be implemented by the circuit system including one or more processors or processor cores in the above-mentioned chip. The function of the communication unit 303 can be implemented by the interface circuit or data transceiver circuit on the above-mentioned chip.

[0151] In some embodiments of the present application, the communication apparatus 300 can be a network side device in the above embodiments. For example, a network device or a communication module in the network device, or a circuit or chip responsible for communication functions in the network device.

[0152] For example, in one embodiment, the communication unit 303 is configured to receive the first indication information and transmit the second indication information.

[0153] In one possible design, the communication unit 303 is further configured to receive the reference signal.

[0154] In one possible design, the processing unit 302 is configured to determine the MCS corresponding to the terminal device, and the communication unit 303 is further configured to transmit the third indication information.

[0155] It can be understood that the specific description of the first indication information, the second indication information, the third indication information, and the reference signal can refer to the method embodiments shown in the above (e.g., the method shown in FIG. 2), which will not be described in detail here.

[0156] It can be understood that the division of the units in the above apparatus is only a logical function division, and each function can correspond to a functional unit, or two or more functions can be integrated into one functional unit. In actual implementation, all or part of the units can be integrated into one physical entity, or can be distributed in different physical entities. In addition, the above functional units can be implemented in the form of hardware, or in the form of software, or in the form of hardware combined with software. Whether a certain function is implemented in hardware or software depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0157] In one example, the functional units in any of the above apparatuses can be one or more integrated circuits configured to implement the above methods, such as one or more application specific integrated circuits (ASICs), or one or more central processing units (CPUs), one or more microcontrollers (MCUs), one or more digital signal processors (DSPs), or one or more field programmable gate arrays (FPGAs), or a combination of at least two of these integrated circuit forms.

[0158] In one example, the storage unit 301 can include random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, and / or registers, etc.

[0159] In a possible implementation, in the communication apparatus shown in FIG. 3, the processing unit 302 can be one or more processors, and the communication unit 303 can be a transceiver, or the communication unit 303, also referred to as a transceiving unit, can include a sending unit and / or a receiving unit, the sending unit can be a transmitter, and the receiving unit can be a receiver, and the sending unit and the receiving unit are integrated in one device, for example, a transceiver. In the embodiments of the present application, the processor and the transceiver can be coupled, and the connection manner of the processor and the transceiver is not limited in the embodiments of the present application. In the process of executing the above method, the process of sending information in the above method can be understood as the process of outputting the above information by the processor. When the above information is outputted, the processor outputs the above information to the transceiver, so as to be transmitted by the transceiver. After the above information is outputted by the processor, it can also need to be processed further, and then reaches the transceiver. Similarly, the process of receiving information in the above method can be understood as the process of receiving the inputted above information by the processor. When the processor receives the inputted information, the transceiver receives the above information and inputs it to the processor. Furthermore, after the transceiver receives the above information, the above information can need to be processed further, and then reaches the processor.

[0160] As shown in FIG. 4, the communication apparatus 400 includes one or more processors 420 and a transceiver 410. The transceiver 410 can include a transmitter and / or a receiver. The transmitter is configured to perform the sending steps performed by the transceiver 410, and the receiver is configured to perform the receiving steps performed by the transceiver 410. Optionally, when the communication apparatus 400 is a chip, the transceiver 410 is an input / output interface, wherein sending corresponds to output, and receiving corresponds to input.

[0161] In some embodiments of the present application, the communication apparatus can be used to perform the steps or functions performed by the terminal device in the above method embodiments.

[0162] Exemplarily, the transceiver 410 is configured to send the first indication information and receive the second indication information.

[0163] Optionally, the processor 420 is configured to determine the first indication information.

[0164] Optionally, the transceiver 410 is further configured to send the reference signal.

[0165] Optionally, the transceiver 410 is further configured to receive the third indication information.

[0166] In some embodiments of the application, the communication device can be configured to perform the steps or functions etc. performed by the network device in the above method embodiments.

[0167] The transceiver 410 is configured to receive the first indication information and transmit the second indication information.

[0168] The processor 420 is configured to determine the second indication information.

[0169] The transceiver 410 is further configured to receive the reference signal, and the processor 420 is configured to determine the MCS corresponding to the terminal device.

[0170] The transceiver 410 is further configured to transmit the third indication information.

[0171] It can be understood that the specific description of the transceiver and the processor shown in the embodiments of the application is only an example. For the specific functions or steps performed by the transceiver and the processor, reference can be made to the above method embodiments, which will not be described in detail here.

[0172] In the above various embodiments, the description of the first indication information, the second indication information, the third indication information, the reference signal, etc. can also refer to the description in the above method embodiments, which will not be described one by one here.

[0173] In each of the various implementations of the communication device shown in FIG. 4, the transceiver can include a receiver configured to perform the functions (or operations) of receiving and a transmitter configured to perform the functions (or operations) of transmitting. The transceiver is configured to communicate with other devices / apparatuses through a transmission medium.

[0174] Optionally, the communication device 400 can further include one or more memories 430 configured to store program instructions and / or data etc. The memory 430 is coupled to the processor 420. The coupling in the embodiments of the application is an indirect coupling or communication connection between devices, units or modules, which can be electrical, mechanical or other form, for information interaction between devices, units or modules. The processor 420 can operate in cooperation with the memory 430. The processor 420 can execute the program instructions stored in the memory 430. Optionally, at least one of the one or more memories can be included in the processor.

[0175] The specific connection medium between the transceiver 410, the processor 420 and the memory 430 in the embodiments of the present application is not limited. In FIG. 4, the memory 430, the processor 420 and the transceiver 410 are connected through a bus 440, which is represented by a thick line in FIG. 4, and the connection mode between other components is only illustrative and is not limited. The bus can be divided into an address bus, a data bus, a control bus and the like. For convenience of representation, only one thick line is used in FIG. 4, but it does not mean that there is only one bus or only one type of bus.

[0176] In the embodiments of the present application, the processor can be a general processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, etc., which can implement or execute the disclosed methods, steps and logic block diagrams in the embodiments of the present application. The general processor can be a microprocessor or any conventional processor, etc. The steps of the method disclosed in combination with the embodiments of the present application can be directly embodied as execution completed by a hardware processor, or executed by a combination of hardware and software modules in the processor, etc.

[0177] In the embodiments of the present application, the memory can include, but is not limited to, a non-volatile memory such as a hard disk drive (HDD) or a solid-state drive (SSD), a random access memory (RAM), an erasable programmable ROM (EPROM), a read-only memory (ROM) or a compact disc read-only memory (CD-ROM), etc. The memory is any storage medium that can be used to carry or store program codes in the form of instructions or data structures and can be read and / or written by a computer (such as the communication device shown in the present application, etc.), but is not limited thereto. The memory in the embodiments of the present application can also be a circuit or any other device capable of realizing a storage function, used for storing program instructions and / or data.

[0178] The processor 420 is mainly used for processing communication protocols and communication data, and controlling the whole communication device, executing software programs, and processing data of the software programs. The memory 430 is mainly used for storing software programs and data. The transceiver 410 can include a control circuit and an antenna, and the control circuit is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are mainly used for receiving user input data and outputting data to users.

[0179] When the communication device is powered on, the processor 420 can read the software programs in the memory 430, interpret and execute the instructions of the software programs, and process the data of the software programs. When data needs to be transmitted wirelessly, the processor 420 performs baseband processing on the data to be transmitted, and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit converts the baseband signal into a radio frequency signal, and transmits the radio frequency signal in the form of electromagnetic waves through the antenna. When data is transmitted to the communication device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 420. The processor 420 converts the baseband signal into data and processes the data.

[0180] In another implementation, the radio frequency circuit and the antenna can be arranged independently of the processor performing baseband processing, for example, in a distributed scenario, the radio frequency circuit and the antenna can be arranged remotely from the communication device.

[0181] It can be understood that the communication device shown in the embodiments of the present application can also have more components than those shown in FIG. 4, and the embodiments of the present application do not limit this. The methods performed by the processor and the transceiver shown above are only examples, and the specific steps performed by the processor and the transceiver can refer to the methods introduced above.

[0182] Referring to FIG. 5, FIG. 5 is a structural schematic diagram of a chip system 500 provided by an embodiment of the present application. The chip system 500 (or also can be referred to as a processing system) includes a logic circuit 510 and an input / output interface 520.

[0183] The logic circuit 510 can be a processing circuit in the chip system 500. The logic circuit 510 can be coupled to a storage unit, call instructions in the storage unit, so that the chip system 500 can implement the methods and functions of the embodiments of the present application. The input / output interface 520 can be an input / output circuit in the chip system 500, output information processed by the chip system 500, or input data or signaling information to be processed by the chip system 500 for processing.

[0184] Optionally, the logic circuit 510 can be implemented by one or more processors, including the one or more processors or processing portions in the one or more processors.

[0185] Optionally, the input / output interface 520 can include a transceiver, a transceiver circuit, an input / output circuit or a communication interface.

[0186] As an option, the chip system 500 is configured to implement operations performed by a communication apparatus (e.g., a terminal device or a network device) in the above method embodiments.

[0187] For example, the logic circuit 510 is configured to implement processing-related operations performed by a communication apparatus (e.g., a terminal device or a network device) in the above method embodiments; and the input / output interface 520 is configured to implement sending and / or receiving-related operations performed by a communication apparatus (e.g., a terminal device or a network device) in the above method embodiments.

[0188] In addition, the embodiments of the present application further provide a communication system including a terminal device and a network device, and the terminal device and the network device are configured to perform the method (e.g., the method shown in FIG. 2) in any of the above embodiments.

[0189] The present application further provides a computer program configured to implement operations and / or processes performed by a terminal device and / or operations and / or processes performed by a network device in the methods provided by the present application.

[0190] The present application further provides a computer-readable storage medium having computer code stored therein, and when the computer code is run on a computer, the computer is caused to perform operations and / or processes performed by a terminal device and / or operations and / or processes performed by a network device in the methods provided by the present application.

[0191] The present application further provides a computer program product including computer code or a computer program, and when the computer code or the computer program is run on a computer, operations and / or processes performed by a terminal device and / or operations and / or processes performed by a network device in the methods provided by the present application are performed.

[0192] The terms "system" and "network" in the embodiments of the present application can be used interchangeably.

[0193] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other manners. For example, the described device embodiments are merely schematic. For example, the division of the units is only a logical function division. There can be another division manner for the actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections can be indirect couplings or communication connections through some interfaces, devices or units, and can be electric, mechanical or other forms.

[0194] The units described as separated components can or can not be physically separated, and the components displayed as units can or can not be physical units, i.e., can be located in one place, or can be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the technical effects of the solutions provided in the embodiments of the present application.

[0195] In addition, each functional unit in the embodiments of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The integrated unit can be implemented in the form of hardware, or in the form of software functional units.

[0196] When the integrated unit is implemented in the form of software functional units and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on such an understanding, the technical solutions of the present application essentially or substantially, or all or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the embodiments of the present application. The foregoing storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk, and various other media that can store program codes.

[0197] Those skilled in the art will appreciate that embodiments of the present application can be readily used as software, hardware, or a combination of software and hardware. In a software embodiment, various software modules are stored in memory (such as RAM, ROM, etc.) and executed by one or more general-purpose or special-purpose processors. In a hardware embodiment, various functions are performed by various hardware components. In an embodiment that is a combination of software and hardware, various functions are performed by a combination of software and hardware.

[0198] The present application is described in reference to the flow diagrams and / or block diagrams of the methods, apparatus (systems) and computer program products according to this application. It will be understood that each block of the flow diagrams and / or block diagrams, and combinations of blocks in the flow diagrams and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flow diagrams and / or block diagrams block or blocks.

[0199] These computer program instructions can also be stored in a computer- readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instructions which implement the function specified in the flow diagrams and / or block diagrams block or blocks.

[0200] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flow diagrams and / or block diagrams block or blocks.

[0201] Obviously, numerous modifications and variations of the present application are possible in light of the above teachings. It is therefore to be understood that within the scope of the claims and their equivalents, the application can be practiced otherwise than as specifically described.

Claims

1. A communication method characterized by comprising: The method comprises: sending first indication information, the first indication information being used for indicating power backoff information when a terminal device transmits a physical uplink shared channel (PUSCH); receiving second indication information, the second indication information indicating expected transmission power of a reference signal, the expected transmission power being related to the power backoff information.

2. The method of claim 1, wherein, The power backoff information comprises at least one power backoff amount, the at least one power backoff amount respectively corresponding to at least one modulation order.

3. The method of claim 2, wherein, The expected transmission power is related to a first power backoff amount, a path loss between the terminal device and a network device, and expected reception power of the reference signal, the first power backoff amount being a power backoff amount in the at least one power backoff amount that matches a modulation order supported by the terminal device.

4. The method of claim 3, wherein, The expected transmission power satisfies: P = P0 + PL - PR. The P represents the expected transmission power, the P0 represents the expected reception power, the PL represents the path loss, and the PR represents the first power backoff amount.

5. The method according to any one of claims 1 to 4, characterized in that, The second indication information indicating the expected transmission power of the reference signal comprises: the second indication information comprising a power spectral density of the reference signal, the power spectral density indicating power of the reference signal per resource unit. The method further comprises: transmitting the reference signal based on the power spectral density.

6. The method of claim 5, wherein, The transmission power of the reference signal is determined by the power spectral density and transmission resources of the reference signal.

7. The method of claim 6, wherein, The resource unit comprises megahertz, the power spectral density indicates power of the reference signal per megahertz, and a transmission power of the reference signal satisfies: P RS,c (i) = min{P CMAX,c (i), 10log 10 (M RS,c (i) · PSD RS,c (i))} Wherein, the P RS,c (i) represents the transmission power of the reference signal, the P CMAX,c (i) represents the maximum transmission power of the terminal device, the M RS,c (i) represents the bandwidth corresponding to the transmission resource, the PSD RS,c (i) represents the power spectral density.

8. The method of claim 6, wherein, The resource unit includes a resource block (RB), the power spectral density indicates the power of the reference signal on each RB, and the transmission power of the reference signal satisfies: P RS,c (i)=min{P CMAX,c (i),10log 10 (M RS,RB (i)·E pRB )} wherein the P RS,c (i) represents a transmit power of the reference signal, the P CMAX,c (i) represents a maximum transmit power of the terminal device, the M RS,RB (i) represents a number of RBs contained in the transmission resource, the E pRB represents the power spectral density.

9. The method of claim 6, wherein, The resource unit includes REs, the power spectral density indicates the power of the reference signal on each RE, and the transmission power of the reference signal satisfies: P RS,c (i)=min{P CMAX,c (i),10log 10 (M RS,RB (i)·E pRE ·N RE )} wherein the P RS,c (i) represents a transmission power of the reference signal, the P CMAX,c (i) represents a maximum transmission power of the terminal device, the M RS,RB (i) represents a number of RBs contained in a transmission resource of the reference signal, the E pRE represents the power spectral density, the N RE represents a number of REs occupied by the reference signal within one RB.

10. A communication method characterized by comprising: The method comprises: receiving first indication information, the first indication information being used for indicating power backoff information when a terminal device transmits a physical uplink shared channel (PUSCH); sending second indication information, the second indication information indicating expected transmission power of a reference signal, the expected transmission power being related to the power backoff information.

11. The method of claim 10, wherein, The power backoff information comprises at least one power backoff amount, the at least one power backoff amount respectively corresponding to at least one modulation order.

12. The method of claim 11, wherein, The expected transmission power is related to a first power backoff amount, a path loss between the terminal device and a network device, and expected reception power of the reference signal, the first power backoff amount being a power backoff amount in the at least one power backoff amount that matches a modulation order supported by the terminal device.

13. The method of claim 12, wherein, The expected transmission power satisfies: P = P0 + PL - PR. The P represents the expected transmission power, the P0 represents the expected reception power, the PL represents the path loss, and the PR represents the first power backoff amount.

14. The method according to claims 10-13, characterized by, The second indication information indicating the expected transmission power of the reference signal comprises: the second indication information comprising a power spectral density of the reference signal, the power spectral density indicating power of the reference signal per resource unit. The method further comprises: transmitting the reference signal based on the power spectral density.

15. The method of claim 14, wherein, The transmission power of the reference signal is determined by the power spectral density and transmission resources of the reference signal.

16. The method of claim 15, wherein, The resource unit comprises megahertz, the power spectral density indicates power of the reference signal per megahertz, and a transmission power of the reference signal satisfies: P RS,c (i) = min{P CMAX,c (i), 10log 10 (M RS,c (i) · PSD RS,c (i))} Wherein, the P RS,c (i) represents the transmission power of the reference signal, the P CMAX,c (i) represents the maximum transmission power of the terminal device, the M RS,c (i) represents the bandwidth corresponding to the transmission resource, the PSD RS,c (i) represents the power spectral density.

17. The method of claim 15, wherein, The resource unit comprises a resource block (RB), the power spectral density indicates a power of the reference signal on each RB, and a transmission power of the reference signal satisfies: P RS,c (i) = min{P CMAX,c (i), 10log 10 (M RS,RB (i) · E pRB )} wherein the P RS,c (i) represents a transmit power of the reference signal, the P CMAX,c (i) represents a maximum transmit power of the terminal device, the M RS,RB (i) represents a number of RBs contained in the transmission resource, the E pRB represents the power spectral density.

18. The method of claim 15, wherein, The resource unit comprises REs, the power spectral density indicates power of the reference signal on each RE, and a transmission power of the reference signal satisfies: P RS,c (i) = min{P CMAX,c (i), 10log 10 (M RS,RB (i) · E pRE · N RE )} wherein the P RS,c (i) represents a transmission power of the reference signal, the P CMAX,c (i) represents a maximum transmission power of the terminal device, the M RS,RB (i) represents a number of RBs contained in a transmission resource of the reference signal, the E pRE represents the power spectral density, the N RE represents a number of REs occupied by the reference signal within one RB.

19. A communications device, characterized by The method comprises modules or units for performing the method as claimed in any one of claims 1 to 18.

20. A communications device, characterized by A communication device comprising a memory for storing a computer program or instructions; and one or more processors for executing the computer program or instructions in the memory to cause the communication device to perform the method of any one of claims 1 to 18.

21. A communications device, characterized by A communication device comprising one or more processors for executing a computer program or instructions to cause the communication device to perform the method of any one of claims 1 to 18.

22. A computer-readable storage medium, characterized in that, A storage medium having stored therein computer programs or instructions which, when executed by a computer, implement the method of any one of claims 1 to 18.

23. A computer program product, characterised in that, A computer program product, which, when read and executed by a computer, causes the computer to perform the method of any one of claims 1 to 18.

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