Communication method and communication device

Abstract

A communication method and a communication device are applied to the technical field of communication. The method comprises: a terminal device sending first indication information, correspondingly, a network device receiving the first indication information, the first indication information being used for indicating power backoff information when the terminal device transmits a PUSCH. The network equipment sends second indication information, correspondingly, the terminal equipment receives the second indication information, the second indication information is used for indicating the expected sending power of the reference signal, and the expected sending power is related to the power backoff information. According to the method and the device, the channel information matched with the PUSCH can be acquired.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of communication, and in particular to a communication method and a communication device. BACKGROUND

[0002] 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.

[0003] Generally, 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 the uplink data (i.e., the PUSCH) transmission based on the channel information.

[0004] 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

[0005] Embodiments of the present application provide a communication method and a communication device, which can obtain channel information matched with the PUSCH.

[0006] In a first aspect, embodiments of the present application provide a communication method, which can be applied to a terminal side, such as a terminal device or a communication module in a terminal device, or a circuit or chip responsible for communication functions in a 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 where the method is applied to a terminal device, in the method, the terminal device transmits first indication information, the first indication information being used to indicate power backoff information of the terminal device when transmitting a physical uplink shared channel (PUSCH); and receives 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.

[0007] In the embodiments of the present application, the reference signal can be used for channel measurement or channel estimation. For example, the network device can obtain channel information based on the reference signal to configure the transmission parameter of the PUSCH. 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., the 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.

[0008] 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.

[0009] In the embodiments 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.

[0010] In combination with the first aspect, in a possible implementation manner, 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 the power backoff amount that matches the modulation order supported by the terminal device in the at least one power backoff amount.

[0011] 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 transmitted by the terminal device, and the path loss can also be referred to as an uplink path loss. The network device can determine the transmission power of the reference signal based on the uplink path loss, the expected reception 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 consistent with the channel environment of the terminal device, and thus more accurate channel information can be obtained based on the reference signal.

[0012] In combination with the first aspect, in a possible implementation manner, the expected transmission power satisfies: P=P0+PL-PR.

[0013] 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.

[0014] In a possible implementation manner of the first aspect, the second indication information indicates a desired transmission power of the reference signal, including that the second indication information includes a power spectral density of the reference signal, the power spectral density indicating a power of the reference signal per resource unit.

[0015] The method further includes transmitting the reference signal based on the power spectral density.

[0016] In the embodiments of the present application, the resource unit includes any one of megahertz, a resource block (RB), a resource element (RE), and a 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.

[0017] In a possible implementation manner of the first aspect, the transmission power of the reference signal is determined by the power spectral density and transmission resources of the reference signal.

[0018] In a possible implementation manner of the first aspect, 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:

[0019] P RS，c (i) = min{P CMAX，c (i), 10 log 10 (M RS，c (i) · PSD RS，c (i))

[0020] 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 a bandwidth corresponding to the transmission resources, and the PSD RS，c (i) represents the power spectral density.

[0021] In a possible implementation manner of the first aspect, the resource unit includes a resource block (RB), the power spectral density indicates the power of the reference signal per RB, and the transmission power of the reference signal satisfies:

[0022] P RS，c (i) = min{P CMAX，c (i), 10 log 10 (MRS，RB (i)·E pRB )}

[0023] 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，RB (i) represents the number of RBs contained in the transmission resource of the reference signal, the E pRB represents the power spectral density.

[0024] With reference to the first aspect, in a possible implementation manner, the resource unit comprises an RE, the power spectral density indicates the power of the reference signal on each RE, and the transmission power of the reference signal satisfies:

[0025] P RS，c (i) = min{P CMAX，c (i), 10log 10 (M RS，RB (i)·E pRE ·N RE )}

[0026] 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，RB (i) represents the 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 the number of REs occupied by the reference signal in one RB.

[0027] The second aspect, the embodiments of the present application provide a communication method, which can be applied to the network side, for example, a network device or a component (such as a circuit, a chip or a chip system, etc.) in the network device, for example, the network device, in the method, the network device receives first indication information, the first indication information is used to indicate the power backoff information when the terminal device transmits the physical uplink shared channel (PUSCH), and transmits second indication information, the second indication information indicates the expected transmission power of the reference signal, and the expected transmission power is related to the power backoff information.

[0028] With reference to the first aspect, in a possible implementation manner, the power backoff information comprises at least one power backoff amount, and the at least one power backoff amount corresponds to at least one modulation order respectively.

[0029] 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 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 among the at least one power backoff amount.

[0030] With reference to the second aspect, in a possible implementation manner, the expected transmission power satisfies: P=P0+PL-PR.

[0031] 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.

[0032] With reference to the second aspect, in a possible implementation manner, the second indication information indicates an expected transmission power of a reference signal, including that the second indication information includes a power spectral density of the reference signal, and the power spectral density indicates a power of the reference signal per resource unit.

[0033] The method further includes: transmitting the reference signal based on the power spectral density.

[0034] With reference to the second aspect, in a possible implementation manner, a transmission power of the reference signal is determined by the power spectral density and a transmission resource of the reference signal.

[0035] With reference to the second aspect, in a possible implementation manner, the resource unit includes a megahertz, the power spectral density indicates a power of the reference signal per megahertz, and the transmission power of the reference signal satisfies:

[0036] P RS，c (i) = min{P CMAX，c (i), 101og 10 (M RS，c (i) · PSD RS，c (i))

[0037] wherein the P RS，c (i) represents the 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, and the PSD RS，c (i) represents the power spectral density.

[0038] 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:

[0039] P RS，c (i) = min{P CMAX，c (i), 10log 10 (M RS，RB (i) · E pRB )}

[0040] 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，RB (i) represents the number of RBs contained in the transmission resource of the reference signal, and the E pRB represents the power spectral density.

[0041] In combination with the second aspect, in a possible implementation manner, the resource unit includes RE, the power spectral density indicates the power of the reference signal on each RE, and the transmission power of the reference signal satisfies:

[0042] P RS，c (i) = min{P CMAX，c (i), 10log 10 (M RS，RB (i) · E pRE · N RE )}

[0043] 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，RB (i) represents the 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 the number of REs occupied by the reference signal in one RB.

[0044] In the third aspect, the present application provides a communication apparatus, which has the function of implementing the first aspect, for example, the communication apparatus includes a module or unit or means corresponding to the operation of the first aspect, which can be implemented by software, or by hardware, or by the combination of software and hardware.

[0045] In a fourth aspect, the present application provides a communication apparatus, which has the functions of the second aspect, for example, the communication apparatus includes modules or units or means corresponding to the operations of the second aspect, and the modules or units or means can be implemented by software or by hardware, or by a combination of software and hardware.

[0046] 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, and when the computer programs or instructions are executed, the communication apparatus implements the method in any possible implementation manner of the first aspect.

[0047] In a possible design, the communication apparatus can further include an interface circuit, and the processor is configured to communicate with other apparatuses or components through the interface circuit.

[0048] In a possible design, the communication apparatus can further include the memory.

[0049] 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.

[0050] 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, and when the computer programs or instructions are executed, the communication apparatus implements the method in any possible implementation manner of the second aspect.

[0051] In a seventh aspect, the embodiments of the present application provide a communication apparatus, which includes one or more processors configured to execute computer programs or instructions to perform the method in any possible implementation manner of the first aspect or the second aspect. Optionally, the apparatus further includes a memory configured to store the computer programs or instructions, and correspondingly, the one or more processors are configured to execute the computer programs or instructions in the memory. Optionally, the apparatus further includes a communication interface coupled to the processor, which can be configured to input the computer programs or instructions into the processor, or output information in the processor.

[0052] In an implementation manner, the apparatus is a communication device (such as a terminal device, or a network device).

[0053] In another implementation, the apparatus is a chip, a chip system or a circuit or a communication module for a communication device, such as a terminal device, and such as a network device.

[0054] In an eighth aspect, an embodiment of the present application provides a processor for executing the method provided in the first aspect or the second aspect.

[0055] For the sending and obtaining / receiving operations involved in the processor, if no special description is made, or if it does not contradict the actual role or the inherent logic in the related description, it can be understood as the processor output and receive, input, and other operations, and it can also be understood as the sending and receiving operations performed by the radio frequency circuit and the antenna, and the present application does not limit this.

[0056] In a ninth aspect, the present application provides a communication system, which includes a terminal device and a network device, the terminal device is configured to execute the method shown in the first aspect or any possible implementation of the first aspect, and the network device is configured to execute the method shown in the second aspect or any possible implementation of the second aspect.

[0057] 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 execute the method in any possible implementation of the first aspect to the second aspect.

[0058] 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 execute the method in any possible implementation of the first aspect to the second aspect.

[0059] In a twelfth aspect, the present application provides a chip, which includes a processor and a communication interface, the processor reads instructions on a memory through the communication interface, and executes the method provided in any implementation of the first aspect or the second aspect.

[0060] 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.

[0061] Optionally, as an implementation, the chip further includes a memory, the memory stores a computer program or instructions, and the processor is configured to execute the computer program or instructions on the memory, when the computer program or instructions are executed, the processor is configured to execute the method provided in any implementation of the first aspect or the second aspect. Attached Figure Description

[0062] The accompanying drawings involved in the embodiments of this application are described below.

[0063] Figure 1A This application provides a schematic diagram of the structure of a communication system according to an embodiment of the present application.

[0064] Figure 1B This is a schematic diagram of another communication system provided in an embodiment of this application;

[0065] Figure 2 A flowchart illustrating a communication method provided in an embodiment of this application;

[0066] Figure 3 This is a schematic diagram of the structure of a communication device provided in an embodiment of this application;

[0067] Figure 4 This is a schematic diagram of another communication device provided in an embodiment of this application;

[0068] Figure 5 This is a schematic diagram of a chip system provided in an embodiment of this application. Detailed Implementation

[0069] The terms "first" and "second," etc., used in the specification, claims, and drawings of this application are only used to distinguish different objects and not to limit the order, sequence, priority, or importance of multiple objects. In the embodiments of this application, "multiple" refers to two or more. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices. Additionally, the character " / ," unless otherwise specified, generally indicates that the preceding and following objects are in an "or" relationship.

[0070] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0071] It should be understood that, in the present 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 "and / or" is used to describe the relationship between the 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 the relationship between the front and rear associated objects as "or". "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.

[0072] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. The technical solutions in the embodiments of the present application can be applied to various communication systems, such as universal mobile telecommunications 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.

[0073] The present application will present various aspects, embodiments or features around a system which can include multiple 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 the devices, components, modules, etc. discussed in conjunction with the drawings. In addition, combinations of these solutions can also be used.

[0074] In addition, in the embodiments of the present application, the words "exemplarily", "for example", and the like are used to represent examples, illustrations, or descriptions. Any embodiment or design scheme described as "exemplary" in the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. Rather, the word "exemplary" is intended to present the concept in a specific manner. In the embodiments of the present application, "of", "corresponding", and "corresponding" are sometimes used interchangeably, and it should be pointed out that when their differences are not emphasized, the meanings expressed are consistent.

[0075] The communication system and the service scenario 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. It can be known by those skilled in the art that, with the evolution of network architecture and the appearance of new service scenarios, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

[0076] As shown in Figure 1A or Figure 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.

[0077] The introductions of the network device and the terminal device are as follows:

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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 the 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.

[0082] 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 a fronthaul interface. 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.

[0083] 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 a wireless link.

[0084] 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 via a lower-layer split CUS-Plane (LLS-CUS) interface through a fronthaul link. The LLS-CUS can include a LLS-C interface and a LLS-U interface that provide a control plane (C-Plane) and a 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 via 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.

[0085] 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.

[0086] 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.

[0087] 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, circuit, or chip for executing corresponding communication functions, and is also configured with program instructions for executing corresponding communication functions.

[0088] 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.

[0089] Figure 1A In the illustrated communication system, 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.

[0090] Figure 1B In the illustrated communication system, a terminal device and a plurality of network devices (such as base station 1, base station 2 and base station 3 in Figure 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.

[0091] The above-mentioned various communication devices, such as Figure 1A or Figure 1BThe base station and the UE in the communication system 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. The embodiments of the present application are not limited to the 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 the like. The embodiments of the present application are not limited thereto.

[0092] It can be understood that, Figure 1A and Figure 1B are only simplified schematic diagrams for the convenience of understanding. The communication system can further include other possible devices, such as wireless relay devices and wireless backhaul devices, and different functional units inside each device can be included, which are not shown in Figure 1A and Figure 1B . The communication between different devices involved in the embodiments of the present application can refer to direct communication between different devices (i.e. without the need for other devices to transfer or forward), or can refer to communication between different devices through other devices (i.e. the need for other devices to transfer or forward), or can refer to the communication between the functional units inside the device and other devices through another functional unit. That is, "sending information to the terminal" in the present application 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 the terminal" can be understood as that the source of the information is the terminal, and can include direct or indirect receiving of information from the terminal. The information can be processed 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.

[0093] 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. In order to enable 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.

[0094] 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.

[0095] For example, four usages of SRS are defined in the protocol, namely antenna switching, codebook, non-codebook, and beam management. Among them, the codebook SRS is used for codebook-based uplink transmission, the non-codebook SRS is used for non-codebook-based uplink transmission, and the beam management SRS is used for beam management. - The codebook SRS is used for non-codebook-based uplink transmission. - The codebook SRS is used for non-codebook-based uplink transmission.

[0096] The terminal device transmits an SRS using an SRS power control adjustment state with index l on a cell c carrier uplink BWP b, and the transmission power of the SRS at transmission occasion i is:

[0097]

[0098] wherein P SRS，b，f，c (i, q s , l) represents the transmission power of the SRS, in dBm. P CMAX，r，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, in dB, h b，f，c (i, l) represents the closed-loop power control adjustment amount.

[0099] 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.

[0100] 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 as shown in Figure 1A or Figure 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.

[0101] It can be understood that the interaction schematic diagram in the present application takes the network device and the terminal device as an example to illustrate the execution subject of the interaction schematic diagram, but the present application does not limit the execution subject of the interaction schematic diagram. For example, the network device in the interaction schematic diagram can also be a chip, a chip system, or a processor supporting the network device to implement the method, and can also be a logical node, a logical module, or software capable of implementing all or part of the functions of the network device; the terminal device in the interaction schematic diagram can also be a chip, a chip system, or a processor supporting the terminal to implement the method.

[0102] Please refer to Figure 2 , Figure 2 a flowchart of a communication method provided by the embodiments of the present application. As shown in Figure 2 , the method includes but is not limited to the following steps.

[0103] 201, the terminal device transmits first indication information, and correspondingly, the network device receives the first indication information, the first indication information being used to indicate power backoff information of the terminal device when transmitting PUSCH.

[0104] 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, and 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).

[0105] 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 the modulation order or 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.

[0106] Exemplarily, the unit of the at least one power backoff amount is dB or dBm.

[0107] As an example, the first indication information further indicates the modulation order or modulation mode corresponding to the at least one power backoff amount.

[0108] As another example, the correspondence between the at least one power backoff amount and the modulation order or 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.

[0109] 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.

[0110] 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.

[0111] 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 and channel selection of uplink channel quality. 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.

[0112] 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.

[0113] 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.

[0114] 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.

[0115] 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.

[0116] For example, the expected transmission power of the reference signal satisfies:

[0117] P = P_0 + PL - PR

[0118] 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.

[0119] Optionally, Figure 2 The method shown can also include step 203.

[0120] 203, the terminal device transmits the reference signal based on the second indication information, and correspondingly, the network device receives the reference signal.

[0121] Exemplarily, 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.

[0122] 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.

[0123] In another possible implementation, the second indication information includes a power spectral density of the reference signal, the power spectral density indicating the power of the reference signal per resource unit, the resource unit including any of megahertz, resource block (RB), resource element (RE), subcarrier.

[0124] Exemplarily, 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.

[0125] 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.

[0126] 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:

[0127] P RS，c (i) = min{P CMAX，c (i), 10 log 10 (M RS，c (i) · PSD RS，c (i))

[0128] wherein P RS，c (i) represents the transmission power of the reference signal at the transmission occasion i of the carrier c, and has a unit 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, and has a unit 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, and has a unit of MHz. PSD RS，c (i) represents the PSD of the reference signal at the transmission occasion i of the carrier c, and has a unit of dB / MHz or dBm / MHz.

[0129] 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.

[0130] 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:

[0131] P RS，c (i) = min{P CMAX，c (i), 10 log 10 (M RS，RB (i) · E pRB )

[0132] wherein P RS，c (i) represents the transmission power of the reference signal at the transmission occasion i of the carrier c, and has a unit 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, and has a unit 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 pRBP (i) denotes the transmission power of the reference signal on the transmission occasion i of the carrier c, in the unit of mW / RB.

[0133] As yet another example, the resource unit includes an RE, and the second indication information indicates the power of the terminal device on each RE. The transmission power of the reference signal on the transmission occasion i of the carrier c satisfies:

[0134] P RS，c (i) = min{P CMAX，c (i), 10 log 10 (M RS，RB (i) · E pRE · N RE )}

[0135] wherein P RS，c (i) denotes the transmission power of the reference signal on the transmission occasion i of the carrier c, in the unit of dBm or dB. P CMAX，c (i) denotes the maximum transmission power of the terminal device on the transmission occasion i of the carrier c, in the unit of dBm or dB. M RS，RB (i) denotes the number of RBs contained by the transmission bandwidth of the reference signal on the transmission occasion i of the carrier c. E pRE denotes the power of each RE of the reference signal on the transmission occasion i of the carrier c. N RE denotes the number of REs occupied by the reference signal within one RB.

[0136] It can be understood that in the present application, “transmission power” and “emission power” can be used interchangeably.

[0137] 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 coefficients) of the uplink channel can be obtained in combination with the transmission power of the reference signal.

[0138] Exemplarily, the network device can estimate the uplink channel coefficients 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.

[0139] Exemplarily, in the TDD scenario, the uplink channel and the downlink channel have reciprocity, and therefore, the network device can also estimate the downlink channel coefficients and / or the downlink precoding matrix based on the reference signal.

[0140] 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 PUSCH signal according to the indicated SRS resource and precoding matrix.

[0141] 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 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 SRS. The network device receives the SRS and then performs channel measurement to determine the optimal weight and the number of streams for uplink transmission of the terminal device, 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 PUSCH signal according to the SRS resource indicated by the indication information.

[0142] 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.

[0143] 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 more accurate uplink path loss.

[0144] Exemplarily, the network device can also determine the modulation and coding scheme (MCS) for transmission of the terminal device based on the channel measurement result of the reference signal.

[0145] Optionally, Figure 2 The method shown can further include step 204.

[0146] 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.

[0147] Exemplarily, the MCS is determined by the network device based on the received reference signal. 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.

[0148] 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 reception 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.

[0149] Exemplarily, the MCS can be determined by the uplink loss, or the modulation order corresponding to the MCS is determined by the uplink loss. For example, the network device can determine the uplink loss based on the reference signal, and determine the MCS or the 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 the 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.

[0150] 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 matched with the PUSCH based on the reference signal.

[0151] The method provided by the embodiments of the present application is described above in combination with the drawings. The device provided by the embodiments of the present application is described below in combination with the drawings.

[0152] Figure 3 A possible exemplary block diagram of a communication device involved in the embodiments of the present application is shown. As shown in the figure, 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. Figure 3

[0153] 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.

[0154] Exemplarily, in an embodiment, the communication unit 303 is configured to send first indication information, and receive second indication information.

[0155] Optionally, the communication unit 303 is further configured to send a reference signal.

[0156] Optionally, the communication unit 303 is further configured to receive third indication information.

[0157] Optionally, the processing unit 302 is configured to determine the first indication information.

[0158] It can be understood that the specific description about the first indication information, the second indication information, the third indication information, the reference signal, etc. can refer to the above-mentioned method embodiments (such as the method shown in the figure), which will not be described in detail here. Figure 2

[0159] 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.

[0160] 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.​​

[0161] In some embodiments of the application, the communication device 300 can be a network device or a communication module in the network device, or a circuit or chip responsible for communication functions in the network device.

[0162] For example, in one embodiment, the communication unit 303 is configured to receive the first indication information and transmit the second indication information.

[0163] In one possible design, the communication unit 303 is further configured to receive the reference signal.

[0164] 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.

[0165] It can be understood that the specific description of the first indication information, the second indication information, the third indication information, the reference signal, etc. can refer to the method embodiments shown in the above (e.g. the method shown in the above), which will not be described in detail here. Figure 2

[0166] It can be understood that the division of the units in the above device 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 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.

[0167] ​In an example, the functional units in any of the above apparatuses can be one or more integrated circuits configured to implement the above methods, for example: one or more application specific integrated circuits (ASICs), or, one or more central processing units (CPUs), one or more microcontroller units (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.

[0168] In an example, the storage unit 301 can include a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, and / or a register, etc.

[0169] In a possible implementation, Figure 3 In the illustrated communication apparatus, 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 can be integrated in one device, for example, a transceiver. In the embodiments of the present application, the processor and the transceiver can be coupled, etc., 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.

[0170] As Figure 4As shown, the communication apparatus 400 comprises one or more processors 420 and a transceiver 410. The transceiver 410 can comprise a transmitter and / or a receiver. The transmitter is configured to perform the transmitting 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 transmitting corresponds to outputting, and receiving corresponds to inputting.

[0171] In some embodiments of the present application, the communication apparatus can be configured to perform the steps or functions etc. performed by the terminal device in the above method embodiments.

[0172] Exemplarily, the transceiver 410 is configured to transmit the first indication information and receive the second indication information.

[0173] Optionally, the processor 420 is configured to determine the first indication information.

[0174] Optionally, the transceiver 410 is further configured to transmit the reference signal.

[0175] Optionally, the transceiver 410 is further configured to receive the third indication information.

[0176] In some other embodiments of the present application, the communication apparatus can be configured to perform the steps or functions etc. performed by the network device in the above method embodiments.

[0177] Exemplarily, the transceiver 410 is configured to receive the first indication information and transmit the second indication information.

[0178] Optionally, the processor 420 is configured to determine the second indication information.

[0179] Optionally, 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.

[0180] Optionally, the transceiver 410 is further configured to transmit the third indication information.

[0181] It can be understood that the specific descriptions of the transceiver and the processor shown in the embodiments of the present application are only examples. 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.

[0182] In the above various embodiments, the descriptions of the first indication information, the second indication information, the third indication information, the reference signal, etc. can also refer to the descriptions in the above method embodiments, which will not be described one by one here.

[0183] In Figure 4In each implementation of the communication apparatus shown, 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 via a transmission medium.

[0184] Optionally, the communication apparatus 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 between the apparatuses, units or modules in the embodiments of the present application is indirect coupling or communication connection between the apparatuses, units or modules, which can be electrical, mechanical or other forms, and is used for information interaction between the apparatuses, 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.

[0185] 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 the embodiments of the present application, the memory 430, the processor 420 and the transceiver 410 are connected through a bus 440, and the bus is represented by a thick line in the embodiments of the present application. The connection mode between other components is only schematically illustrated and is not limited. The bus can be divided into an address bus, a data bus, a control bus, etc. For convenience of representation, only one thick line is used to represent the bus in the embodiments of the present application, but it does not mean that there is only one bus or only one type of bus. Figure 4 Figure 4 Figure 4

[0186] 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 conjunction 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.

[0187] ​​​The memory in the embodiments of the present application 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), and the like. 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 embodiments of the present application and the like). 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.

[0188] For example, the processor 420 is mainly used for processing communication protocols and communication data, 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. The input and output devices, such as touch screens, display screens, keyboards and the like, are mainly used for receiving user input data and outputting data to users.

[0189] 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.

[0190] 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.

[0191] It can be understood that the communication device shown in the embodiments of the present application can also have more or fewer components than those shown in the embodiments of the present application. Figure 4More components, etc. are not limited by embodiments of the present application. The method performed by the processor and transceiver shown above is only an example. For the steps specifically performed by the processor and transceiver, refer to the method introduced above.

[0192] Referring to Figure 5 , Figure 5 is a structural schematic diagram of a chip system 500 provided by embodiments of the present application. The chip system 500 (or also referred to as a processing system) includes a logic circuit 510 and an input / output interface 520.

[0193] 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, invoke instructions in the storage unit, so that the chip system 500 can implement the methods and functions of 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.

[0194] 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.

[0195] Optionally, the input / output interface 520 can include a transceiver, a transceiver, an input / output circuit or a communication interface.

[0196] As a solution, the chip system 500 is used to implement the operations performed by the communication device (such as a terminal device, and also such as a network device) in the above various method embodiments.

[0197] For example, the logic circuit 510 is used to implement the processing-related operations performed by the communication device (such as a terminal device, and also such as a network device) in the above method embodiments; the input / output interface 520 is used to implement the sending and / or receiving-related operations performed by the communication device (such as a terminal device, and also such as a network device) in the above method embodiments.

[0198] In addition, embodiments of the present application also provide a communication system, the communication system includes a terminal device and a network device, the terminal device and the network device are used to execute the method (such as Figure 2 the method shown above) in any of the preceding embodiments.

[0199] The present application also provides a computer program for implementing the operations and / or processing performed by the terminal device in the method provided by the present application, or the operations and / or processing performed by the network device.

[0200] The application further provides a computer-readable storage medium, which stores computer code. When the computer code is run on a computer, the computer code causes the computer to perform operations and / or processes performed by a terminal device and / or operations and / or processes performed by a network device in the method provided by the application.

[0201] The application further provides a computer program product, which includes computer code or a computer program. 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 method provided by the application are performed.

[0202] The terms "system" and "network" in the embodiments of the application can be used interchangeably.

[0203] In several embodiments provided in the 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, and the division of units is merely a logical function division, and there can be another division manner in 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 coupling or direct coupling or communication connection between units can be indirect coupling or communication connection through some interfaces, devices or units, and can also be electrical, mechanical or other forms of connection.

[0204] The units described as separate components can or can not be physically separate, and the components shown 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. Part or all of the units can be selected according to actual needs to achieve the technical effects of the scheme provided in the embodiments of the application.

[0205] In addition, each functional unit in each embodiment of the application can be integrated into a processing unit, or each unit can be a physically independent unit, or two or more units can be integrated into one unit. The integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0206] The integrated unit, if implemented in the form of a software function unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or say the part of the prior art that contributes to the present application, or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a readable storage medium, including a plurality of 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 aforementioned readable storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0207] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, etc.) containing computer-usable program code.

[0208] The present application is described with reference to flowcharts and / or block diagrams according to the methods, devices (systems), and computer program products of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and the combination of flows and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices produce a device that implements the functions specified in one or more flows in the flowcharts and / or one or more blocks in the block diagrams.

[0209] These computer program instructions can also be stored in a computer readable storage medium that can guide the computer or other programmable data processing devices to work in a specific way, so that the instructions stored in the computer readable storage medium produce a manufactured product including instruction devices that implement the functions specified in one or more flows in the flowcharts and / or one or more blocks in the block diagrams.

[0210] These computer program instructions can also be loaded into a computer or other programmable data processing devices, so that a series of operational steps are performed on the computer or other programmable devices to generate computer-implemented processes, so that the instructions executed on the computer or other programmable devices provide steps for implementing the functions specified in one or more flows in the flowchart and / or one or more blocks in the block diagram.

[0211] Obviously, various modifications and changes can be made to the present application by those skilled in the art without departing from the scope of the present application. Thus, it is intended that the present application embrace all such modifications and changes and, accordingly, the application is not to be limited by the above-described one or more embodiments.

Claims

1. A communication method, characterized in that, include: Send a first indication message, which is used to instruct the terminal device to transmit power back-off information when transmitting the Physical Uplink Shared Channel (PUSCH); Receive second indication information, the second indication information indicating the expected transmission power of the reference signal, the expected transmission power being related to the power back-off information.

2. The method according to claim 1, characterized in that, The power back-off information includes at least one power back-off amount, and the at least one power back-off amount corresponds to at least one modulation order.

3. The method according to claim 2, characterized in that, The desired transmit power is related to a first power backoff amount, the path loss between the terminal device and the network device, and the desired receive power of the reference signal. The first power backoff amount is the power backoff amount among the at least one power backoff amount that matches the modulation order supported by the terminal device.

4. The method according to claim 3, characterized in that, The desired transmission power satisfies: P = P0 + PL - PR; Wherein, P represents the desired transmit power, P0 represents the desired receive power, PL represents the path loss, and PR represents the first power backoff amount.

5. The method according to any one of claims 1-4, characterized in that, The second indication information indicates the expected transmission power of the reference signal, including: the second indication information includes the power spectral density of the reference signal, the power spectral density indicating the power of the reference signal per resource unit; The method further includes: The reference signal is transmitted based on the power spectral density.

6. The method according to claim 5, characterized in that, The transmission power of the reference signal is determined by the power spectral density and the transmission resources of the reference signal.

7. The method according to claim 6, characterized in that, 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))} Wherein, P RS,c (i) represents the transmission power of the reference signal, wherein P CMAX,c (i) represents the maximum transmission power of the terminal device, where M... RS,c (i) represents the bandwidth corresponding to the transmission resource, and the PSD RS,c (i) represents the power spectral density.

8. The method according to claim 6, characterized in that, 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, P RS,c (i) represents the transmission power of the reference signal, wherein P CMAX,c (i) represents the maximum transmission power of the terminal device, where M... RS,RB (i) represents the number of RBs contained in the transmission resource, the E pRB This represents the power spectral density.

9. The method according to claim 6, characterized in that, 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, P Rs,c (i) represents the transmission power of the reference signal, wherein P CMAX,c (i) represents the maximum transmission power of the terminal device, where M... RS,RB (i) represents the number of RBs included in the transmission resources of the reference signal, the E pRE The N represents the power spectral density. RE This indicates the number of REs occupied by the reference signal within one RB.

10. A communication method, characterized in that, include: Receive first indication information, the first indication information being used to instruct the terminal device on power backoff information when transmitting the Physical Uplink Shared Channel (PUSCH); Send a second indication message, which indicates the expected transmission power of the reference signal, and the expected transmission power is related to the power back-off information.

11. The method according to claim 10, characterized in that, The power back-off information includes at least one power back-off amount, and the at least one power back-off amount corresponds to at least one modulation order.

12. The method according to claim 11, characterized in that, The desired transmit power is related to a first power backoff amount, the path loss between the terminal device and the network device, and the desired receive power of the reference signal. The first power backoff amount is the power backoff amount among the at least one power backoff amount that matches the modulation order supported by the terminal device.

13. The method according to claim 12, characterized in that, The desired transmission power satisfies: P = P0 + PL - PR; Wherein, P represents the desired transmit power, P0 represents the desired receive power, PL represents the path loss, and PR represents the first power backoff amount.

14. The method according to claims 10-13, characterized in that, The second indication information indicates the expected transmission power of the reference signal, including: the second indication information includes the power spectral density of the reference signal, the power spectral density indicating the power of the reference signal per resource unit; The method further includes: The reference signal is transmitted based on the power spectral density.

15. The method according to claim 14, characterized in that, The transmission power of the reference signal is determined by the power spectral density and the transmission resources of the reference signal.

16. The method according to claim 15, characterized in that, 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))} Wherein, P RS,c (i) represents the transmission power of the reference signal, wherein P CMAX,c (i) represents the maximum transmission power of the terminal device, where M... RS,c (i) represents the bandwidth corresponding to the transmission resource, and the PSD RS,c (i) represents the power spectral density.

17. The method according to claim 15, characterized in that, 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, P RS,c (i) represents the transmission power of the reference signal, wherein P CMAX,c (i) represents the maximum transmission power of the terminal device, where M... RS,RB (i) represents the number of RBs contained in the transmission resource, the E pRB This represents the power spectral density.

18. The method according to claim 15, characterized in that, 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, P RS,c (i) represents the transmission power of the reference signal, wherein P CMAX,c (i) represents the maximum transmission power of the terminal device, where M... RS,RB (i) represents the number of RBs included in the transmission resources of the reference signal, the E pRE The N represents the power spectral density. RE This indicates the number of REs occupied by the reference signal within one RB.

19. A communication device, characterized in that, Includes modules or units for performing the method as described in any one of claims 1 to 18.

20. A communication device, characterized in that, The device includes a memory and one or more processors, the memory being used to store computer programs or instructions; the one or more processors being used to execute the computer programs or instructions in the memory, causing the communication device to perform the method as described in any one of claims 1 to 18.

21. A communication device, characterized in that, It includes one or more processors, said one or more processors, for executing computer programs or instructions to cause said communication device to perform the method of any one of claims 1 to 18.

22. A computer-readable storage medium, characterized in that, The storage medium stores a computer program or instructions, which, when executed by a computer, implement the method as described in any one of claims 1 to 18.

23. A computer program product, characterized in that, When the computer reads and executes the computer program product, it causes the computer to perform the method as described in any one of claims 1 to 18.

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