CN115811779A

CN115811779A - Uplink power indication method and device

Info

Publication number: CN115811779A
Application number: CN202111076135.2A
Authority: CN
Inventors: 王瀚庆; 王潇涵; 金黄平; 孙琰
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-09-14
Filing date: 2021-09-14
Publication date: 2023-03-17
Also published as: WO2023040841A1

Abstract

The embodiment of the application relates to an uplink power indication method and a device, wherein the method comprises the following steps: the method comprises the steps that terminal equipment receives a reference signal, the reference signal comprises K1 bits of a first sequence, the first sequence is used for indicating uplink power of the terminal equipment, the bit number of the first sequence is larger than 2, and K1 is smaller than or equal to the bit number of the first sequence; and the terminal equipment determines the uplink power according to the reference signal. The radio access network device can indicate higher accuracy uplink power to the network device.

Description

Uplink power indication method and device

Technical Field

The present application relates to the field of wireless communications technologies, and in particular, to an uplink power indication method and apparatus.

Background

With the development of communication technology, emerging data services put higher requirements on uplink transmission rate. However, more uplink transmission data streams and multi-station cooperative reception make the interference environment of uplink transmission more complex, and the realization of high-precision uplink power control is helpful to improve multi-user interference, thereby improving the uplink data transmission rate.

The radio access network device may carry a power control command in a Transmit Power Control (TPC) field of Downlink Control Information (DCI), where the power control command is used to indicate adjustment information of uplink power. The power control command comprises 2 bits, and can only indicate adjustment amounts of 4 uplink powers, so that the precision is low.

Disclosure of Invention

The application provides an uplink power indication method and device, which are used for improving the indication precision of uplink power.

In a first aspect, a method for indicating uplink power is provided, which includes the following steps: the terminal device receives a reference signal. The reference signal carries information of K1 bits of a first sequence, the first sequence is used for indicating uplink power of terminal equipment, the bit number K of the first sequence is an integer larger than 2, and K1 is a positive integer smaller than or equal to K. That is, all or part of the bits of the first sequence may be indicated by the reference signal.

Optionally, a part of bits of the first sequence is indicated by the reference signal, and a part of bits is indicated by the downlink control information. For example, the terminal device may receive downlink control information DCI, where DCI includes a first sequence of K2 bits, where K1+ K2= K.

The bit number of the first sequence is greater than 2, so that the terminal equipment can be instructed to the uplink power with higher precision, and the reliability of communication can be improved.

The value of the uplink power indicated by the first sequence may be an absolute value or a relative value, and the relative value may refer to an adjustment amount of the uplink power.

The terminal device may determine the uplink power according to the reference signal. When all bits of the first sequence are indicated by the reference signal, the terminal device can directly determine the uplink power according to the reference signal. When all bits of the first sequence are indicated by the reference signal and the downlink control information together, the terminal device may determine the uplink power according to the reference signal and the downlink control information, in which case the method may improve the accuracy of indicating the uplink power and does not increase the overhead of the downlink control information additionally.

In one possible design, the K2 bits of the first sequence are carried in the transmit power control, TPC, field of the DCI.

In a possible design, each bit of K1 bits is mapped to downlink precoding of a reference signal on a corresponding subband, and for a bit of K1 bits whose value is 0, the bit of K1 bits whose value is 0 corresponds to a first transmission power, and for a bit of K1 bits whose value is 1, the bit of K1 bits whose value is 1 corresponds to a second transmission power, and the subband is a subband used by a terminal device for uplink transmission. In this design, the K1 bits of information are mapped onto the reference signal, so that all or part of the bits of the first sequence are indicated by the reference signal. The first transmission power is used for indicating that the value of the bit is 0, and the second transmission power is used for indicating that the value of the bit is 1.

In a possible design, when K1 is equal to K, and when the terminal device determines the uplink power according to the reference signal, the terminal device may determine the equivalent channel matrix on each subband according to the reference signal; the terminal equipment compares a modulus of the equivalent channel matrix with a first threshold to determine information of K1 bits carried in the reference signal; the terminal equipment determines a first quantization interval of uplink power according to the K1 bits; and the terminal equipment determines the uplink power according to the first quantization interval. In this design, all bits of the first sequence are indicated by the reference signal.

In one possible design, when the terminal device determines the uplink power according to the reference signal and the DCI, the terminal device may determine an equivalent channel matrix on each subband according to the reference signal; the terminal equipment compares the modulus of the equivalent channel matrix with a first threshold, and K1 bits carried in the reference signal are determined; the terminal equipment acquires K2 bits carried in the DCI; the terminal equipment determines K bits according to the K1 bits and the K2 bits; the terminal equipment determines a second quantization interval of the uplink power according to the K bits; and the terminal equipment is according to the second quantization interval. In this design, a partial bit of the first sequence is indicated by the reference signal and a partial bit is indicated by the DCI.

In a possible design, the first sequence may be obtained by quantizing the value of the uplink power by K bits, or the first sequence is obtained by encoding the second sequence, the second sequence is obtained by quantizing the value of the uplink power by Q bits, Q is a positive integer, and Q is smaller than K.

In one possible design, the reference signal is a channel state information reference signal, CSI-RS.

In one possible design, the terminal device may further allocate uplink power to each subband scheduled by the terminal device, and transmit uplink data on each subband with corresponding uplink power. In this design, the terminal device may send uplink data on each scheduled subband based on uplink power, so as to implement communication with the network device.

In a second aspect, a method for indicating uplink power is provided, which includes the following steps: the method comprises the steps that a wireless access network device determines a first sequence, the first sequence is used for indicating uplink power of a terminal device, and the bit number K of the first sequence is an integer larger than 2; the radio access network equipment sends a reference signal, the reference signal carries information of K1 bits of the first sequence, and K1 is an integer smaller than or equal to K.

In one possible design, the radio access network device may further send downlink control information DCI, where DCI includes a first sequence of K2 bits, where K1+ K2= K.

In a possible design, before the radio access network device sends the reference signal, for a bit with a value of 0 in the K1 bits, a first sending power corresponding to the bit with the value of 0 may be further determined, and for a bit with a value of 1 in the K1 bits, a second sending power corresponding to the bit with the value of 1 may be further determined; and determining downlink precoding of the reference signal on the subband corresponding to each bit in the K1 bits according to the uplink precoding, the first transmission power, the second transmission power and the downlink channel matrix on each subband, wherein the subband is a subband scheduled by the terminal equipment, namely the subband used for uplink transmission by the terminal equipment.

In one possible design, when the radio access network device determines the first sequence, the radio access network device may determine a first quantization interval of the uplink power of the terminal device; and carrying out bit quantization on the labels of the first quantization interval to obtain a first sequence.

In a possible design, when the radio access network device performs bit quantization on the index of the first quantization interval to obtain a first sequence, the radio access network device performs K bit quantization on the value of the uplink power to obtain the first sequence.

In one possible design, when the radio access network device performs bit quantization on the labels of the first quantization interval to obtain a first sequence, performing Q bit quantization on the numerical value of the uplink power to obtain a second sequence, wherein Q is a positive integer and Q is smaller than K; and coding the second sequence to obtain the first sequence.

In one possible design, the value of the uplink power is an absolute value or a relative value, and the relative value is an adjustment amount of the uplink power.

In one possible design, the radio access network device may further superimpose reference signals of multiple terminal devices on a subband, where the subband is scheduled by the multiple terminal devices, that is, the subband is used for uplink transmission of the multiple terminal devices, and the multiple terminal devices include the terminal device.

In a third aspect, a communication apparatus is provided, where the communication apparatus may be the above terminal device or radio access network device, or a chip disposed in the terminal device or radio access network device. The communication device may implement the method of the first or second aspect.

The communication device includes corresponding modules, units, or means (means) for implementing the above methods, and the modules, units, or means may be implemented by hardware, software, or by hardware executing corresponding software. The hardware or software includes one or more modules or units corresponding to the above functions.

In a fourth aspect, a communication apparatus is provided that includes a transceiving unit. Optionally, the communication device further comprises a processing unit. The communication device may implement the method of the first or second aspect.

In a fifth aspect, a communications apparatus is provided that includes a processor. The processor may be adapted to perform the method of the first or second aspect.

Optionally, the apparatus further comprises a memory, the processor being coupled to the memory, the processor being operable to execute instructions in the memory to cause the apparatus to perform the method of the first or second aspect.

Optionally, the apparatus further comprises an interface circuit, the processor being coupled to the interface circuit.

The interface circuit may be a code/data read/write interface circuit, which is configured to receive and transmit computer-executable instructions (which are stored in a memory, may be directly read from the memory, or may pass through other devices) to the processor, so that the processor executes the computer-executable instructions to perform the method of any of the above aspects.

In some possible designs, the communication device may be a chip or a system of chips.

In a sixth aspect, a communications apparatus is provided that includes a processor and a memory. The processor is configured to read instructions stored in the memory, and may receive signals via the receiver and transmit signals via the transmitter to perform the method of the first or second aspect.

Optionally, the number of the processors is one or more, and the number of the memories is one or more.

Alternatively, the memory may be integral to the processor or provided separately from the processor.

In a specific implementation process, the memory may be a non-transitory (non-transitory) memory, such as a Read Only Memory (ROM), which may be integrated on the same chip as the processor, or may be separately disposed on different chips, and the embodiment of the present application does not limit the type of the memory and the arrangement manner of the memory and the processor.

The communication device may be a chip, the processor may be implemented by hardware or may be implemented by software, and when implemented by hardware, the processor may be a logic circuit, an integrated circuit, or the like; when implemented in software, the processor may be a general-purpose processor implemented by reading software code stored in a memory, which may be integrated with the processor, located external to the processor, or stand-alone.

In a seventh aspect, a processor is provided, including: input circuit, output circuit and processing circuit. The processing circuit is configured to receive a signal via the input circuit and transmit a signal via the output circuit, such that the processor performs the method of the first or second aspect.

In a specific implementation process, the processor may be a chip, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a flip-flop, various logic circuits, and the like. The input signal received by the input circuit may be received and input by, for example and without limitation, a receiver, the signal output by the output circuit may be output to and transmitted by a transmitter, for example and without limitation, and the input circuit and the output circuit may be the same circuit that functions as the input circuit and the output circuit, respectively, at different times. The embodiment of the present application does not limit the specific implementation manner of the processor and various circuits.

In an eighth aspect, a communication apparatus is provided, including: the input/output interface is used for communicating with a module outside the communication device; the logic circuitry is for executing a computer program to perform the method of any of the above aspects. The communication device may be the terminal device or the radio access network device in the first aspect or the second aspect, or a device including the terminal device or the radio access network device, or a device included in the terminal device or the radio access network device, such as a chip.

Alternatively, the input/output interface may be a code/data read/write interface circuit, and the input/output interface is used for receiving a computer program (the computer program is stored in a memory, may be directly read from the memory, or may pass through other devices) and transmitting the computer program to the input/output interface, so that the input/output interface executes the computer program to execute the method of any aspect.

Alternatively, the communication device may be a chip.

In a ninth aspect, there is provided a computer program product comprising: a computer program (which may also be referred to as code, or instructions), which when executed, causes a computer to perform the method of the first or second aspect described above.

A tenth aspect provides a computer-readable medium storing a computer program (which may also be referred to as code, or instructions) which, when run on a computer, causes the computer to perform the method of the first or second aspect.

In an eleventh aspect, a chip system is provided, which comprises a processor and an interface, and is configured to enable a communication apparatus to implement the functions recited in the first aspect or the second aspect. In one possible design, the chip system further comprises a memory for storing necessary information and data of the aforementioned communication means. The chip system may be formed by a chip, or may include a chip and other discrete devices.

In a twelfth aspect, a functional entity is provided for implementing the method in the first to second aspects.

In a thirteenth aspect, a communication system is provided, which includes the terminal device and the radio access network device of the first or second aspect.

The technical effects brought by any one of the design manners of the second aspect to the thirteenth aspect can be referred to the technical effects brought by the first aspect, and are not described herein again.

Drawings

FIG. 1 is a block diagram of a communication system;

fig. 2 is a schematic diagram of a process of uplink power indication according to an embodiment of the present application;

fig. 3 is a schematic diagram of a reference signal provided in an embodiment of the present application;

fig. 4 is a schematic flowchart of an uplink power indication according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a communication device according to an embodiment of the present application.

Detailed Description

The present application will be described in further detail below with reference to the accompanying drawings.

This application is intended to present various aspects, embodiments, or features around a system that may include a number of devices, components, modules, and the like. It is to be understood and appreciated that the various systems may include additional devices, components, modules, etc. and/or may not include all of the devices, components, modules etc. discussed in connection with the figures. Furthermore, a combination of these schemes may also be used.

In addition, in the embodiments of the present application, the word "exemplary" is used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, the term using examples is intended to present concepts in a concrete fashion.

The network architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not form a limitation on the technical solution provided in the embodiment of the present application, and it can be known by a person of ordinary skill in the art that the technical solution provided in the embodiment of the present application is also applicable to similar technical problems with the evolution of the network architecture and the occurrence of a new service scenario.

Some terms of the embodiments of the present application are explained below to facilitate understanding by those skilled in the art.

1) And the terminal equipment is used for realizing the equipment with the wireless communication function. The terminal may be a User Equipment (UE), an access terminal, a terminal unit, a terminal station, a mobile station, a remote terminal, a mobile device, a wireless communication device, a terminal agent, a terminal device, or the like in a fifth generation (5 g) network or a Public Land Mobile Network (PLMN) for future evolution. The access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device or a wearable device, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transport security (transport security), a wireless terminal in city (smart), a wireless terminal in smart home (smart), etc. Alternatively, the terminal may be a terminal (e.g., a vehicle-to-apparatus Device) in a vehicle-to-apparatus (V2X), a terminal in a Device-to-Device (Device to Device) communication, a terminal in a machine-to-machine (M2M) communication, or the like. The terminal may be mobile or stationary.

2) The network device is a device for accessing the terminal device to a wireless network. The network device may be a node in a radio access network, which may also be referred to as a base station, and may also be referred to as a Radio Access Network (RAN) device (or node). For example, the network device may include an evolved Node B (NodeB or eNB or eNodeB) in a Long Term Evolution (LTE) system or an evolved LTE system (LTE-Advanced, LTE-a), such as a traditional macro base station eNB and a micro base station eNB in a heterogeneous network scenario; or may also include a next generation Node B (gNB) in a fifth generation (5 th generation,5 g) New Radio (NR) system, or may also include a Transmission Reception Point (TRP), a home base station (e.g., home evolved NodeB, or home Node B, HNB), a Base Band Unit (BBU), a base band pool BBU port, or a wireless fidelity (Wi-Fi) Access Point (AP), etc.; still alternatively, the system may further include a Centralized Unit (CU) and a Distributed Unit (DU) in a cloud access network (cloudlan) system; or may include a network device in a non-terrestrial network (NTN), that is, the network device may be deployed in an aerial platform or a satellite, and in the NTN, the network device may serve as a layer 1 (L1) relay (relay), or may serve as a base station, or may serve as a DU, or may serve as an Integrated Access and Backhaul (IAB) node, which is not limited in the embodiment of the present application.

Of course, the network device may also be a node in the core network.

3) The uplink power is also called transmission power or transmission power. The power used by the terminal device for uplink transmission means that the terminal device can transmit uplink data based on the uplink power.

"and/or" in the present application, describing an association relationship of associated objects, means that there may be three relationships, for example, a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

In the present application, at least one means one or more, and a plurality means two or more.

It is to be understood that the terms "first," "second," and the like, in the description of the present application, are used for distinguishing between descriptions and not necessarily for describing a sequential or chronological order, or for indicating or implying a relative importance.

The technical solution of the embodiment of the present application may be applied to a wireless communication system, for example: the wireless communication system may be a fourth generation (4 g) communication system (e.g., long Term Evolution (LTE) system), a fifth generation (5 g) communication system (e.g., NR system), a future mobile communication system, and so on. The technical scheme of the embodiment of the application can also be applied to a satellite communication system, wherein the satellite communication system can be fused with a wireless communication system.

The communication system provided by the embodiment of the application is suitable for communication between the wireless access network equipment and the terminal equipment. One or more radio access network devices, and one or more terminal devices may be included in the communication system. For example, as shown in fig. 1, a communication system may include two radio access network devices (e.g., radio access network device 1 and radio access network device 2), and a plurality of terminal devices (e.g., UE1 to UE 5). The radio access network device 1 can perform uplink and downlink communication with the UEs 1 to 3, and the radio access network device 2 can perform uplink and downlink communication with the UEs 4 to 5. The dotted line in fig. 1 indicates that uplink interference may exist, for example, uplink information sent by UE3 may be received by radio access network device 2, which may cause interference to uplink transmissions of UE4 and UE5, and for example, uplink information sent by UE4 may be received by radio access network device 1, which may cause interference to uplink transmissions of UEs 1 to 4. The communication system in the embodiment of the application can also be suitable for communication between the wireless access network equipment and the wireless access network equipment, communication between the terminal equipment and the terminal equipment, and communication of the Internet of vehicles, the Internet of things, the industrial Internet and the like.

With the development of communication technology, emerging data services put higher demands on uplink transmission rate. However, more uplink transmission data streams and multi-station cooperative reception make the interference environment of uplink transmission more complicated, and high-precision uplink power control helps to improve multi-user interference and increase the uplink data transmission rate.

As specified in the 3rd generation partnership project (3 gpp) protocol, the UE calculates the uplink power using the following formula (1):

P＝min{P _CMAX ,10log(M)+P ₀ +αPL+Δ _TF +f(i)} (1)

wherein P represents uplink power, P _CMAX Denotes the maximum transmission power of the UE itself, M denotes the number of subbands occupied by the uplink transmission, P ₀ Represents a desired received power level of the radio access network equipment, α represents a path loss (hereinafter referred to as path loss) compensation factor, PL represents an estimate of the uplink path loss, Δ _TF And f (i) represents an uplink power offset value of a different Modulation and Coding Scheme (MCS) format relative to a reference MCS format, and f (i) represents an uplink power adjustment amount indicated by the TPC received by the UE from the radio access network equipment.

The radio access network equipment carries a power control command in a TPC field of the DCI, and the power control command is used for indicating the adjustment amount of the uplink power. The power control command includes 2 bits (bit), and can indicate adjustment amounts of 4 uplink powers, which are-1 decibel to one milliwatt (dBm), 0dBm, 1dBm, and 3dBm, respectively. After receiving the DCI, the UE may obtain an adjustment amount of the uplink power according to a power control command carried in a TPC field of the DCI, and then substitute the adjustment amount of the uplink power into f (i) in formula (1), thereby calculating the uplink power.

But only 4 kinds of uplink power adjustment quantity can be indicated through 2 bits, and the precision is low.

Based on this, the present application provides an uplink power indication method, which can be applied to the communication system shown in fig. 1. In the method, the radio access network device may send, to the terminal device, information of a first sequence, where the first sequence is used to indicate uplink power of the terminal device, where a bit number K of the first sequence is greater than 2, and information of all bits or part of bits of the first sequence may be carried in a reference signal, so that the radio access network device may indicate uplink power with higher accuracy to the terminal device.

Fig. 2 is a process of indicating uplink power according to an embodiment of the present application, where the process includes:

s201: the wireless access network equipment determines a first sequence, the first sequence is used for indicating the uplink power of the terminal equipment, the bit number of the first sequence is K, and K is an integer greater than 2.

Wherein the radio access network device may determine the uplink power of one or more terminal devices. Typically, the one or more terminal devices are located within the coverage area of the radio access network device. In this embodiment, a terminal device is mainly used as an example for description.

In one implementation, the value of the uplink power of the terminal device is an absolute value. The terminal device may use the absolute value of the uplink power as the uplink power used for transmitting the uplink data.

In another implementation manner, the value of the uplink power of the terminal device is a relative value, and the relative value is an adjustment amount of the uplink power. The terminal device may determine the uplink power used for transmitting the uplink data according to the adjustment amount of the uplink power and a power reference value, where the power reference value may be an open-loop power control result or an absolute value of the uplink power determined last time.

Unless otherwise specified, the "uplink power" or "numerical value of uplink power" in the embodiment of the present application may refer to an absolute value of uplink power, or may refer to an adjustment amount of uplink power (i.e., a relative value of uplink power).

Optionally, the radio access network device may determine the uplink power of the terminal device according to a Sounding Reference Signal (SRS) sent by the terminal device. For example, the terminal device sends SRS through N ports, the receiving antenna of the radio access network device is M, and the radio access network device can estimate the uplink channel matrix H of the terminal device _UL An M x N matrix. The wireless access network equipment is based on the uplink channel matrix H of the terminal equipment _UL Calculating the uplink precoding P of the terminal device on all sub-bands (including one or more sub-bands) _UL,i And uplink power ρ _UL . Where i denotes the ith subband, ρ, scheduled by the terminal device _UL Is the absolute value of the uplink power. At this time, the terminal device calculates the uplink power ρ _UL May be the sum of the transmission power on all sub-bands, and in the subsequent communication process, the terminal device may sum the uplink power ρ _UL And allocating communication on each sub-band.

Optional, wireless accessThe network device may also reconstruct a downlink channel according to the uplink channel. E.g., radio access network equipment based on the uplink channel matrix H _UL And reciprocity of uplink and downlink channels, and reconstruction of downlink channel matrix H _DL In TDD scenario, the uplink and downlink channels have reciprocity, and the downlink channel matrix

In FDD scene, the uplink and downlink channels have reciprocity in angle time delay domain, and the downlink channel matrix H _DL The main direction of the channel needs to be included, and the way of calculating the downlink channel in the FDD scenario is not limited here.

The wireless access network equipment can determine the absolute value rho of the uplink power of the terminal equipment _UL Or determining the adjustment quantity delta rho of the uplink power of the terminal equipment _UL 。Δρ _UL According to the absolute value rho of the uplink power _UL And a power reference value

Determination, e.g. of

Or

Optionally, power reference value

May be an open loop power control result (e.g., min { P }) _CMAX ,10log(M)+P ₀ +αPL+Δ _TF H) or may be an absolute value of the last determined uplink power.

Wherein the uplink power of the terminal device (can be determined by the absolute value ρ) _UL Or the adjustment value Δ ρ _UL Indicative), this may be indicated by the first sequence, which may also be understood as TPC information. The first sequence is used to indicate whether the absolute value of the uplink power or the adjustment of the uplink power can be specified by a protocol or negotiated in advance by the radio access network device and the terminal device. The number of bits of the first sequence is K,where K is an integer greater than 2, may indicate a higher accuracy uplink power. In one implementation, K may also be less than or equal to the number of subbands. In another implementation, K may also be less than the sum of the number of subbands and the number of bits of the TPC in the DCI.

In one possible example, the radio access network device may perform bit quantization on the value of the uplink power to obtain the first sequence. For example, the radio access network device performs K bit quantization on the value of the uplink power to obtain a first sequence, and the first sequence obtained after the bit quantization is a binary sequence. For another example, the radio access network device quantizes Q bits of the value of the uplink power to obtain a second sequence, and further encodes the second sequence to obtain the first sequence. The redundancy of the second sequence is increased by the first sequence obtained after coding, and the reliability of uplink power indication can be improved.

In another possible example, the radio access network device and the terminal device may know a mapping relationship between the uplink power and an uplink power range, where different uplink power ranges correspond to different quantization intervals. The label of the quantization interval represents the uplink power of the terminal equipment, or the label after bit quantization represents the uplink power of the terminal equipment, so that the indication resource required by the uplink power is less, and the indication resource of the uplink power can be saved. For example, the radio access network device determines a first quantization interval of uplink power of the terminal device, and performs bit quantization on a label of the first quantization interval to obtain a first sequence. The first quantization interval is a quantization interval corresponding to a first uplink power range in which the uplink power is located.

The radio access network device may map the index of the first quantization interval to the first sequence as follows.

Mode 1: and the wireless access network equipment quantizes the label of the first quantization interval by K bits to obtain a first sequence.

In mode 1, the first sequence is a binary sequence of K bits, i.e., the first number is K. Specifically, in the quantization process, if K bits are quantized, the radio access network device may divide the quantization interval into 2 ^K Quantized interval indexc∈{0,1,…2 ^K -1}, with a lower bound of quantization intervals c

And upper bound

Then, a quantization interval number of a quantization interval to which the value of the uplink power belongs is determined, and a binary representation of the quantization interval number is determined as a first sequence, e.g., the first sequence is represented as b = [ b ] ₀ ,b ₁ ,…b _K-1 ]. For example, the wireless access network device determines to quantize 8 bits, and divides the quantization interval into 2 ⁸ I.e., 256, each quantization interval being numbered 0,1,2, \ 8230;, 255, assuming that the value of the uplink power is a, the radio access network device determines that the value of the uplink power a falls within the quantization interval numbered 165, and the radio access network device may treat the binary representation of 165 as a first sequence, i.e., a first sequence b = [1,0, 1]]。

The value of K can be regulated by a protocol, or the wireless access network equipment is adjusted semi-statically, the wireless access network equipment informs the terminal equipment of the value of K, and K is larger than 2. Lower bound of quantization interval c

And upper bound

May be specified by a protocol or semi-statically adjusted by the radio access network device, the radio access network device informing the terminal device of the lower bound of the quantization interval c

And upper bound

Mode 2: and the wireless access network equipment quantizes the Q bits of the label of the first quantization interval to obtain a second sequence, and further encodes the second sequence to obtain a first sequence with the length of K bits. Wherein the number of bits K of the first sequence is greater than the number of bits Q of the second sequence.

In this mode 2, the second sequence is a binary sequence of Q bits, for example, the second sequence is represented by b = [ b ] ₀ ,b ₁ ,…b _Q-1 ]。

The radio access network device may further encode the second sequence, increase the redundancy of the second sequence, obtain the first sequence, and may improve the reliability of the uplink power indication. For example, the radio access network device may encode the sequence b by using a channel coding technique to obtain a first sequence of K bits. For example, the first sequence is represented as

The embodiment of the present application does not limit the channel coding technology, for example, the channel coding technology may be a Turbo code coding technology, a Low Density Parity Check (LDPC) code coding technology, a Polar code coding technology, and the like.

Modes

1 and 2 are applicable to high signal to interference plus noise ratio (SINR) and low SINR scenarios. In a low SINR scenario, the reliability of the uplink power control indication in mode 2 is higher than that in mode 1.

S202: the wireless access network equipment sends the reference signal, and the corresponding terminal equipment receives the reference signal. The reference signal carries K1 bits of information of the first sequence, K1 being a positive integer less than or equal to K.

The radio access network device may map the K1 bits into the reference signal, so as to implement that the information of the K1 bits is carried in the reference signal. Specifically, the radio access network device determines, for a bit with a value of 0 among K1 bits, a first transmission power (e.g., β) corresponding to the bit with the value of 0 ₀ ) And aiming at the bit with the value of 1 in the K1 bits, determining a second transmission power (such as beta) corresponding to the bit with the value of 1 ₁ ) Due to reciprocity of uplink and downlink channels, the wireless access network device may determine the uplink precoding, the first transmit power, the second transmit power, and the downlink channel matrix on each sub-bandAnd each bit in the K1 bits corresponds to downlink precoding of the reference signal on a sub-band, and the sub-band is one or more sub-bands scheduled by the terminal equipment. The first transmission power is used for indicating that the bit value is 0, and the second transmission power is used for indicating that the bit value is 1.

In one example, all bits of information in the first sequence are carried in the reference signal and not in the DCI, i.e., K1= K. Therefore, the indication precision of the uplink power can be improved, and the expense of DCI can be saved. The optional reference signal may be a downlink reference signal such as a channel state information-reference signal (CSI-RS) or a demodulation reference signal (DMRS).

In this example, the radio access network device may map each bit of the first sequence into a reference signal in a power mapping manner, for example, into downlink precoding of CSI-RS on each subband of the terminal device. If the power mapping mode is adopted, the wireless access network equipment converts the kth bit b in the first sequence _k Downlink precoding P mapped to CSI-RS on ith subband _DL,i For example, the mapping rules are as follows: for the k-th bit b in the first sequence _k If b is _k =0, order

If b is _k =1, order

β ₀ Corresponds to b _k Downlink power of CSI-RS, =0 &, beta ₁ Corresponds to b _k If the power is not less than 1, the downlink power of the CSI-RS is increased, and then the wireless access network equipment solves the equation set

And determining the downlink precoding of the CSI-RS.

In another example, the radio access network device may map partial bits of the first sequence into the reference signal in a power mapping manner, i.e., K1< K. In other words, information of a part of bits in the first sequence is carried in the reference signal, and other part of bits is contained in the DCI. Therefore, the indication precision of the uplink power can be improved, and the overhead of DCI is not additionally increased. Optionally, corresponding to this example, in S202, the radio access network device further transmits DCI, where the DCI includes K2 bits of the first sequence.

For example, the reference signal carries K1 bits of information of the first sequence, the DCI comprises K2 bits of the first sequence, and K1+ K2= K. If the DCI indicates the uplink power by 2 bits, K2 is less than or equal to 2. Optionally, K2 bits of the first sequence are carried in the TPC field of the DCI.

In this example, the radio access network device may map partial bit information of the first sequence to the reference signal in a power mapping manner, and carry other partial bits in the DCI. If a power mapping mode is adopted, the DCI can directly transmit K2 bits, and the K1 bits are mapped to the downlink precoding of the CSI-RS. The number of bits K2 and K1 are the several bits in the first sequence (i.e. the positions of K1 bits and K2 bits in the first sequence), respectively, and is not limited, but the terminal device and the radio access network device need to know the positions of K1 bits and K2 bits in the first sequence. Illustratively, the radio access network device and the terminal device may negotiate in advance the positions of K1 bits and K2 bits in the first sequence.

For example, the first sequence is [1,0, 1], 8 bits, the top 2 bits of the first sequence are indicated by DCI, and the remaining 6 bits of information are carried in CSI-RS. Fig. 3 shows 12 subbands, where 4 blank boxes are 4 subbands that are not scheduled by the terminal device, the terminal device schedules the remaining 8 subbands, and the 1 st subband and the 2 nd bit transmit bits 1 and 0 as reference power (value of non-uplink power) of CSI-RS, which is used as reference value when the terminal device decodes, and may be used to assist the terminal device to determine the first threshold used in the first sequence decision, and transmit the last 6 bits of the first sequence on the 3rd to 8 th subbands. Wherein each bit in the first sequence has a corresponding relationship with a subband. The corresponding relationship between each bit in the first sequence and a subband and the position of the subband used for transmitting the reference power of the uplink power may be indicated to the terminal device by the radio access network device through Radio Resource Control (RRC) signaling in a semi-static manner, or may be indicated to the terminal device by the radio access network device through other upper layer signaling.

The first sequence may be a sequence obtained by bit quantization or a sequence obtained by encoding the second sequence, and in both examples, the radio access network device maps the first sequence. Wherein bit quantization refers to a process of quantizing a value of uplink power into a binary sequence of several bits.

As shown in fig. 3, the reference power of the CSI-RS is transmitted through 2 subbands. The more the number of sub-bands used for transmitting reference signals of the CSI-RS is, the more accurate the first threshold determined by the terminal equipment is, the more accurate the determined first sequence is, and the higher the reliability of the uplink power indication is.

S203: and the terminal equipment determines the uplink power of the terminal equipment according to the reference signal.

In one example, all bits of information in the first sequence are carried in the reference signal.

The terminal device may determine an equivalent channel matrix (for example, a downlink channel matrix obtained according to the uplink channel matrix estimation) on each subband according to the reference signal, compare a modulus (for example, which may be obtained through normalization) of the equivalent matrix with a first threshold to obtain K1 bits carried in the reference signal, then determine a first quantization interval of the uplink power according to the K1 bits, and determine the uplink power according to the first quantization interval. The first quantization interval is a quantization interval corresponding to a first uplink power range in which the uplink power is located.

For example, in the demapping process, the terminal device may estimate the equivalent channel matrix H on each subband i according to the reference signal _DL,i P _DL,i And then normalizing the equivalent channel matrix to obtain uplink precoding on the sub-band i. And, the terminal device may estimate the uplink power, e.g., the terminal device compares the modulus of the equivalent channel matrix (representing K1 bits) with a first thresholdAnd judging to obtain a first sequence b = [ b ] ₀ ,b ₁ ,b ₂ ,b ₃ ,…b _K-1 ](binary representation form), the quantization interval label c (decimal representation form) where the adjustment quantity corresponding to the adjustment quantity of the uplink power indicated by the first sequence is located, and the middle point of each quantization interval is taken as the adjustment quantity of the uplink power, namely

(decimal representation form), according to the adjustment amount of the uplink power, Δ ρ _UL And a power reference value

Determining an absolute value ρ of uplink power _UL Such as

In another example, information of partial bits in the first sequence is carried in the reference signal and other partial bits are carried in the DCI.

Optionally, in S203, the terminal device may determine the uplink power according to the reference signal and the DCI.

The terminal device may determine an equivalent channel matrix (e.g., a downlink channel matrix obtained according to the uplink channel matrix estimation) on each sub-band according to the reference signal, compare a modulus of the equivalent matrix with a first threshold to obtain K1 bits carried in the reference signal, and obtain K2 bits carried in the DCI, then determine K bits according to the K1 bits and the K2 bits, determine a second quantization interval of the uplink power according to the K bits, and determine the uplink power according to the second quantization interval. The second quantization interval is a quantization interval corresponding to a second uplink power range in which the uplink power is located. The first uplink power range and the second uplink power range may be the same or different, and the first quantization interval and the second quantization interval may be the same or different.

For example, referring to fig. 4, the terminal device may read K2 bits (e.g. b) of the first sequence directly from the DCI ₀ And b ₁ ) Demapping in a reference signalGet the first sequence of K1 bits (e.g. b) ₂ ,b ₃ ,…,b _K-1 ) A first sequence of K bits (binary representation) is obtained. The terminal device converts the first sequence in binary representation into a quantization interval index c in decimal representation. Assuming that the first sequence is used to indicate the adjustment amount of the uplink power, the terminal device takes the midpoint of the quantization interval with the quantization interval index c as the adjustment amount of the uplink power, that is, the terminal device takes the midpoint of the quantization interval as the adjustment amount of the uplink power

Determining an absolute value ρ of uplink power _UL Such as

If the radio access network device encodes the second sequence to obtain the first sequence, in S203, the terminal device decodes the first sequence to obtain the second sequence, and then converts the second sequence into a decimal system to obtain the uplink power.

Optionally, after determining the uplink power, if the terminal device uses one sub-band for transmission, the terminal device sends the uplink data on the sub-band with the determined uplink power. If the terminal device uses multiple sub-bands for transmission, the terminal device may allocate uplink power to each sub-band, for example, may allocate uplink power to each sub-band equally, or may allocate uplink power to each sub-band using a water-filling algorithm, and transmit uplink data using corresponding uplink power on each sub-band.

When uplink power of a plurality of terminal devices needs to be indicated, if each terminal device adopts different CSI-RS ports for indication, excessive CSI-RS resources are occupied. In this embodiment of the present application, in S202, the radio access network device may multiplex the first sequences of the multiple terminal devices to the same group of CSI-RS ports for indication, and compared with the case where each terminal device uses a different CSI-RS port for indication, CSI-RS resources may be further saved.

The radio access network device may superimpose bits in the first sequence of the multiple terminal devices on a subband, or may superimpose reference signals of the multiple terminal devices on a subband, to implement the indication for the multiple terminal devices, where the subband may be scheduled by the multiple terminal devices, that is, the subband may be used for uplink transmission of the multiple terminal devices. For the UE, the UE may demodulate its uplink precoding and uplink power on the CSI-RS of the second subband. For example, the downlink channel matrixes from the radio access network equipment to the UE1 to the UE3 on the ith subband are respectively

And

the wireless access network equipment hopes to indicate to UE 1-UE 3 that the precoding vectors of corresponding bits in the first sequence on the sub-band i are respectively

And

then there is

For UE1, UE1 may be based on CSI-RS

Estimating the equivalent channel matrix of the self

Thereby determining the uplink power of UE 1.

In the uplink power indication method provided in the embodiment of the present application, the radio access network device may send, to the terminal device, information of a first sequence, where the first sequence is used to indicate uplink power of the terminal device, where a bit number K of the first sequence is greater than 2, and information of all bits or part of bits of the first sequence may be carried in a reference signal, so that the radio access network device may indicate uplink power with higher accuracy to the terminal device.

It is understood that the various information (e.g., CSI-RS, DCI, TPC, etc.) related to the embodiments of the present application are only examples and are not limited thereto. For example, the information of the K2 bits of the first sequence may be carried in other downlink control signaling of the non-DCI, or may be carried in other fields of the non-TPC.

Based on the same technical concept as the uplink power indication method, the embodiment of the present application further provides a communication apparatus, as shown in fig. 5, a communication apparatus 500 includes a processing unit 501 and a transceiver unit 502, and the communication apparatus 500 may be configured to implement the method described in the above method embodiment. The apparatus 500 may be applied to or located in a terminal device or a radio access network device.

In one possible embodiment, the apparatus 500 is a terminal device.

A transceiver unit 502, configured to receive a reference signal, where the reference signal carries information of K1 bits of a first sequence, the first sequence is used to indicate uplink power of a terminal device, the number of bits of the first sequence is K, K is an integer greater than 2, and K1 is an integer less than or equal to K;

a processing unit 501, configured to determine uplink power according to the reference signal.

In an implementation, the transceiving unit 502 is further configured to receive downlink control information DCI when K1 is less than K, where the DCI includes K2 bits of a first sequence, where K1+ K2= K;

the processing unit 501 is specifically configured to determine uplink power according to the reference signal and the DCI.

In one implementation, each bit of the K1 bits is mapped to downlink precoding of a reference signal on a corresponding subband, and for a bit of the K1 bits whose value is 0, the bit of the K1 bits whose value is 0 corresponds to a first transmission power, and for a bit of the K1 bits whose value is 1, the bit of the K1 bits whose value is 1 corresponds to a second transmission power, and the subband is a subband used by the terminal device for uplink transmission.

In one implementation, the processing unit 501 is specifically configured to determine an equivalent channel matrix on each subband according to a reference signal; comparing the modulus of the equivalent channel matrix with a first threshold, and determining information of K1 bits carried in the reference signal; determining a first quantization interval of uplink power according to the K1 bits; and determining the uplink power according to the first quantization interval.

In one implementation, the processing unit 501 is specifically configured to determine an equivalent channel matrix on each subband according to a reference signal; comparing a modulus of the equivalent channel matrix with a first threshold, and determining K1 bits carried in a reference signal; acquiring K2 bits carried in DCI; determining K bits according to the K1 bits and the K2 bits; determining a second quantization interval of the uplink power according to the K bits; and determining the uplink power according to the second quantization interval.

In one implementation, the value of the uplink power is an absolute value or a relative value, and the relative value is an adjustment amount of the uplink power.

In one implementation, the first sequence is obtained by quantizing the value of the uplink power by K bits; or the first sequence is obtained by coding the second sequence, the second sequence is obtained by quantizing the numerical value of the uplink power by Q bits, Q is a positive integer, and Q is smaller than K.

In one implementation, the transceiver unit 502 is further configured to allocate uplink power to each subband scheduled by the terminal device, and transmit uplink data on each subband with corresponding uplink power.

In another possible embodiment, the apparatus 500 is a radio access network device.

A processing unit 501, configured to use a first sequence, where the first sequence is used to indicate that uplink power of a terminal device is determined, and a bit number of the first sequence is K, where K is an integer greater than 2;

a transceiving unit 502, configured to send a reference signal, where the reference signal carries information of K1 bits of the first sequence, and K1 is a positive integer smaller than or equal to K.

In an implementation, the transceiver unit 501 is further configured to transmit downlink control information DCI, where the DCI includes K2 bits of a first sequence, where K1+ K2= K.

In one implementation, the processing unit 501 is further configured to determine, for a bit with a value of 0 in the K1 bits, a first transmission power corresponding to the bit with the value of 0, and determine, for a bit with a value of 1 in the K1 bits, a second transmission power corresponding to the bit with the value of 1; and determining the downlink precoding of the reference signal on the sub-band corresponding to each bit in the K1 bits according to the uplink precoding, the first transmission power, the second transmission power and the downlink channel matrix on each sub-band, wherein the sub-band is used for uplink transmission by the terminal equipment.

In an implementation manner, the processing unit 501 is specifically configured to determine a first quantization interval to which the uplink power of the terminal device belongs; and carrying out bit quantization on the labels of the first quantization interval to obtain a first sequence.

In one implementation, the processing unit 501 is specifically configured to quantize the index of the first quantization interval by K bits to obtain a first sequence.

In an implementation manner, the processing unit 501 is specifically configured to quantize the labels of the first quantization interval by Q bits to obtain a second sequence, where Q is a positive integer and Q is smaller than K; and coding the second sequence to obtain the first sequence.

In one implementation, the transceiver unit 502 is further configured to superimpose reference signals of multiple terminal devices on a subband, where the subband is used for uplink transmission of the multiple terminal devices, and the multiple terminal devices include the terminal device.

It should be noted that, the division of the modules in the embodiments of the present application is schematic, and is only a logical function division, and in actual implementation, there may be another division manner, and in addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or may exist alone physically, or two or more units are integrated in one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. With this understanding, the integrated unit may be stored in a storage medium as a computer software product, and includes several instructions to enable a computer device (which may be a personal computer, a server, or a radio access network device) or a processor (processor) to execute all or part of the steps of the methods according to the embodiments of the present application.

As shown in fig. 6, an embodiment of the present application further provides a schematic structural diagram of a communication device 600. The apparatus 600 may be used to implement the method described in the method embodiments above, and reference may be made to the description in the method embodiments above.

The apparatus 600 includes one or more processors 601. The processor 601 may be a general purpose processor or a special purpose processor, etc. For example, a baseband processor, or a central processor. The baseband processor may be used to process communication protocols and communication data, and the central processor may be used to control a communication device (e.g., a base station, a terminal, or a chip), execute a software program, and process data of the software program. The communication device may include a transceiving unit to enable input (reception) and output (transmission) of signals. For example, the transceiver unit may be a transceiver, a radio frequency chip, or the like.

The apparatus 600 includes one or more processors 601, and the one or more processors 601 may implement the methods in the illustrated embodiments described above.

Optionally, the processor 601 may also implement other functions besides implementing the methods of the above-described illustrated embodiments.

Alternatively, in one design, processor 601 may execute instructions that cause apparatus 600 to perform the methods described in the above method embodiments. The instructions may be stored in whole or in part within the processor, such as instructions 603, or in whole or in part in a memory 602 coupled to the processor, such as instructions 604, or may collectively cause the apparatus 600 to perform the methods described in the above method embodiments, via

instructions

603 and 604. The instructions 603 are also referred to as computer programs.

In yet another possible design, the communication device 600 may also include a circuit, and the circuit may implement the functions in the foregoing method embodiments.

In yet another possible design, the apparatus 600 may include one or more memories 602 having instructions 604 stored thereon, which may be executed on a processor, to cause the apparatus 600 to perform the methods described in the above method embodiments. Optionally, the memory may also store data. Instructions and/or data may also be stored in the optional processor. For example, the one or more memories 602 may store the correspondence described in the above embodiments, or the related parameters or tables referred to in the above embodiments, and the like. The processor and the memory may be provided separately or may be integrated together.

In yet another possible design, apparatus 600 may also include transceiver 605 and antenna 606. The processor 601 may be referred to as a processing unit and controls a device (terminal or base station). The transceiver 605 may be referred to as a transceiver, a transceiving circuit, a transceiving unit, or the like, and is used for performing transceiving functions of the apparatus through the antenna 606.

The processor may be a general-purpose Central Processing Unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), one or more integrated circuits for controlling the execution of programs in accordance with the present disclosure, a general-purpose processor, a Digital Signal Processor (DSP), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, or discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software modules may be stored on a storage medium that is located in memory.

The memory may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of example, but not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), dynamic Random Access Memory (DRAM), synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), double Data Rate Synchronous Dynamic random access memory (DDR SDRAM), enhanced Synchronous SDRAM (ESDRAM), synchronous link SDRAM (SLDRAM), and Direct Rambus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory. The memory may be separate and coupled to the processor via a communication link. The memory may also be integrated with the processor.

It is to be understood that the architecture shown in fig. 7 does not constitute a specific limitation to the terminal device and the radio access network device. For example, in other embodiments of the present application, a terminal device or a radio access network device may include more or fewer components than shown, or some components may be combined, or some components may be split, or a different arrangement of components may be used. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

The embodiment of the present application further provides a computer-readable medium, on which a computer program is stored, where the computer program, when executed by a computer, implements the uplink power indication method in any of the above method embodiments.

An embodiment of the present application further provides a computer program product, which includes a computer program, and when the computer program is executed by a computer, the method for indicating uplink power in any of the method embodiments described above is implemented.

The embodiment of the present application further provides a communication system, which includes a terminal device and a radio access network device, where the terminal device and the radio access network device may implement the uplink power indication method in any of the above method embodiments.

In the above embodiments, all or part of the implementation may be realized by software, hardware, firmware, or any combination thereof. When implemented in software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The procedures or functions according to the embodiments of the present application are all or partially generated when the computer instructions are loaded and executed on a computer. The computer may be the communication device described above. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium. The computer-readable storage medium may be the above-mentioned storage medium or the above-mentioned memory.

In one possible design, when the communication device is a chip, such as a chip in a radio access network device or a chip in a terminal device, the determining unit or processor 601 may be one or more logic circuits, and the transmitting unit or receiving unit or transceiver 605 may be an input/output interface, also referred to as a communication interface or an interface circuit or interface, and so on. Or the transceiver 605 may also be a transmitting unit which may be an output interface and a receiving unit which may be an input interface, which are integrated into one unit, such as an input-output interface. As shown in fig. 7, the communication apparatus shown in fig. 7 includes a logic circuit 701 and an interface circuit 702. I.e. the above-mentioned determining unit or processor 601 may be implemented with a logic circuit 701 and the transmitting unit or receiving unit or transceiver 605 may be implemented with an interface circuit 702. The logic circuit 701 may be a chip, a processing circuit, an integrated circuit, or a system on chip (SoC) chip, and the interface circuit 702 may be a communication interface, an input/output interface, or the like. In the embodiments of the present application, the logic circuit and the interface circuit may also be coupled to each other. The embodiment of the present application is not limited to a specific connection manner between the logic circuit and the interface circuit.

In some embodiments of the present application, the logic circuitry and interface circuitry may be configured to perform the functions or operations described above as being performed by the radio access network device or the terminal device, among others.

Illustratively, the interface circuit 702 is configured to receive a reference signal.

The logic circuit 701 is configured to determine the uplink power according to the reference signal.

The functions or operations performed by the radio access network device or the terminal device may refer to the foregoing method embodiments, and are not described in detail herein.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be embodied in electronic hardware, computer software, or combinations of both, and that the components and steps of the examples have been described in a functional general in the foregoing description for the purpose of illustrating clearly the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a unit is only a logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may also be an electric, mechanical or other form of connection.

Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the elements may be selected according to actual needs to achieve the purpose of the solution of the embodiments of the present application.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

Through the above description of the embodiments, those skilled in the art will clearly understand that the present application can be implemented in hardware, firmware, or a combination thereof. When implemented in software, the functions described above may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a computer.

In short, the above are only examples of the technical solutions of the present application, and are not intended to limit the scope of the present application. Any modification, equivalent replacement, improvement and the like made within the principle of the present application shall be included in the protection scope of the present application.

Claims

1. An uplink power indication method, comprising:

a terminal device receives a reference signal, wherein the reference signal carries information of K1 bits of a first sequence, the first sequence is used for indicating uplink power of the terminal device, the bit number of the first sequence is K, K is an integer greater than 2, and K1 is a positive integer less than or equal to K;

and the terminal equipment determines the uplink power according to the reference signal.

2. The method of claim 1, wherein when K1 is less than K, the method further comprises:

the terminal equipment receives downlink control information DCI, wherein the DCI comprises K2 bits of the first sequence, and K1+ K2= K;

and the terminal equipment determines the uplink power according to the reference signal and the DCI.

3. The method of claim 2, wherein the K2 bits of the first sequence are carried in a transmit power control, TPC, field of the DCI.

4. The method according to any of claims 1-3, wherein each of the K1 bits is mapped into downlink precoding of a reference signal on a corresponding subband, and for a bit of the K1 bits with a value of 0, the bit with the value of 0 corresponds to a first transmit power, and for a bit of the K1 bits with a value of 1, the bit with the value of 1 corresponds to a second transmit power, and the subband is a subband used by the terminal device for uplink transmission.

5. The method of claim 1 or 4, wherein when K1 is equal to K, the terminal device determines uplink power according to the reference signal, and comprises:

the terminal equipment determines an equivalent channel matrix on each sub-band according to the reference signal;

the terminal equipment compares a modulus of the equivalent channel matrix with a first threshold, and determines the information of the K1 bits carried in the reference signal;

the terminal equipment determines a first quantization interval of uplink power according to the K1 bits;

and the terminal equipment determines the uplink power according to the first quantization interval.

6. The method of any one of claims 2-4, wherein the determining, by the terminal device, the uplink power according to the reference signal and the DCI comprises:

the terminal equipment compares a modulus of the equivalent channel matrix with a first threshold to determine the K1 bits carried in the reference signal;

the terminal equipment acquires the K2 bits carried in the DCI;

the terminal equipment determines the K bits according to the K1 bits and the K2 bits;

the terminal equipment determines a second quantization interval of the uplink power according to the K bits;

and the terminal equipment determines the uplink power according to the second quantization interval.

7. The method according to any one of claims 1-6, wherein the value of the uplink power is an absolute value or a relative value, and the relative value is an adjustment amount of the uplink power.

8. The method according to any of claims 1-7, wherein the first sequence is obtained by K bits quantizing the value of the uplink power; or

The first sequence is obtained by coding a second sequence, the second sequence is obtained by quantizing the numerical value of the uplink power through Q bits, Q is a positive integer, and Q is smaller than K.

9. The method according to any of claims 1-8, wherein the reference signal is a channel state information reference signal, CSI-RS.

10. The method of any one of claims 1-9, further comprising:

the terminal equipment distributes the uplink power to each sub-band scheduled by the terminal equipment;

and the terminal equipment transmits uplink data on each subband by adopting corresponding uplink power.

11. An uplink power indication method, comprising:

the method comprises the steps that a wireless access network device determines a first sequence, the first sequence is used for indicating uplink power of a terminal device, the bit number of the first sequence is K, and K is an integer larger than 2;

and the wireless access network equipment sends a reference signal, the reference signal carries information of K1 bits of the first sequence, and K1 is a positive integer less than or equal to K.

12. The method of claim 11, wherein when K1 is less than K, the method further comprises:

and the wireless access network equipment sends downlink control information DCI, wherein the DCI comprises K2 bits of the first sequence, and K1+ K2= K.

13. The method of claim 12, wherein the K2 bits of the first sequence are carried in a transmit power control, TPC, field of the DCI.

14. The method of any of claims 11-13, wherein prior to the radio access network device transmitting the reference signal, further comprising:

for a bit with a value of 0 in the K1 bits, the radio access network device determines a first transmission power corresponding to the bit with the value of 0, and for a bit with a value of 1 in the K1 bits, the radio access network device determines a second transmission power corresponding to the bit with the value of 1;

and the wireless access network equipment determines downlink precoding of a reference signal on a subband corresponding to each bit in the K1 bits according to the uplink precoding, the first transmission power, the second transmission power and a downlink channel matrix on each subband, wherein the subband is used for uplink transmission by the terminal equipment.

15. The method of claim 11 or 14, wherein the radio access network device determining the first sequence comprises:

the wireless access network equipment determines a first quantization interval of uplink power of the terminal equipment;

and the wireless access network equipment performs bit quantization on the label of the first quantization interval to obtain the first sequence.

16. The method of claim 15, wherein the radio access network device bit quantizes the indices of the first quantization interval to obtain the first sequence, comprising:

and the wireless access network equipment quantizes the label of the first quantization interval by K bits to obtain the first sequence.

17. The method of claim 15, wherein the radio access network device bit quantizes the index of the first quantization interval to obtain the first sequence comprises:

the wireless access network equipment quantizes the label of the first quantization interval by Q bits to obtain a second sequence, wherein Q is a positive integer and is smaller than K;

and the wireless access network equipment encodes the second sequence to obtain a first sequence.

18. The method according to any of claims 11-17, wherein the value of the uplink power is an absolute value or a relative value, and the relative value is an adjustment amount of the uplink power.

19. The method according to any of claims 11-18, wherein the reference signal is a channel state information reference signal, CSI-RS.

20. The method of any one of claims 11-19, further comprising:

the radio access network device superimposes reference signals of a plurality of terminal devices on a sub-band, wherein the sub-band is used for uplink transmission of the plurality of terminal devices, and the plurality of terminal devices comprise the terminal device.

21. A communications apparatus, comprising:

a transceiver unit, configured to receive a reference signal, where the reference signal carries information of K1 bits of a first sequence, the first sequence is used to indicate uplink power of the communication device, and the number of bits of the first sequence is K, where K is an integer greater than 2 and K1 is a positive integer less than or equal to K;

and the processing unit is used for determining the uplink power according to the reference signal.

22. The apparatus of claim 21, wherein the transceiving unit is further configured to receive a Downlink Control Information (DCI) when K1 is smaller than K, the DCI comprising K2 bits of the first sequence, wherein K1+ K2= K;

the processing unit is specifically configured to determine the uplink power according to the reference signal and the DCI.

23. The apparatus of claim 22, wherein each of the K1 bits is mapped into downlink precoding of a reference signal on a corresponding subband, and for a bit of the K1 bits that takes a value of 0, the bit that takes a value of 0 corresponds to a first transmit power, and for a bit of the K1 bits that takes a value of 1, the bit that takes a value of 1 corresponds to a second transmit power, the subband being a subband used by the communication apparatus for uplink transmission.

24. The apparatus according to claim 21 or 23, wherein the processing unit is specifically configured to determine an equivalent channel matrix on each subband based on the reference signal; comparing the modulus of the equivalent channel matrix with a first threshold, and determining the information of the K1 bits carried in the reference signal; determining a first quantization interval of uplink power according to the K1 bits; and determining the uplink power according to the first quantization interval.

25. The apparatus according to claim 22 or 23, wherein the processing unit is specifically configured to determine an equivalent channel matrix on each subband based on the reference signal; comparing a modulus of the equivalent channel matrix with a first threshold, and determining the K1 bits carried in the reference signal; acquiring the K2 bits carried in the DCI; determining the K bits according to the K1 bits and the K2 bits; determining a second quantization interval of the uplink power according to the K bits; and determining the uplink power according to the second quantization interval.

26. The apparatus according to any of claims 21-25, wherein the value of the uplink power is an absolute value or a relative value, and the relative value is an adjustment amount of the uplink power.

27. The apparatus according to any of claims 21-26, wherein said first sequence is obtained by K bits quantizing said value of uplink power, K being a positive integer; or

The first sequence is obtained by coding a second sequence, the second sequence is obtained by quantizing the numerical value of the uplink power by Q bits, Q is a positive integer, and Q is smaller than K.

28. The apparatus of any of claims 21-27, wherein the transceiver unit is further configured to allocate the uplink power to each sub-band scheduled by the communications apparatus, and to transmit uplink data using a corresponding uplink power on each sub-band.

29. A communications apparatus, comprising:

a processing unit, configured to determine a first sequence, where the first sequence is used to indicate uplink power of a terminal device, and a bit number of the first sequence is K, where K is an integer greater than 2;

and the transceiving unit is used for sending a reference signal, the reference signal carries the information of K1 bits of the first sequence, and K1 is a positive integer less than or equal to K.

30. The apparatus of claim 29, wherein the transceiver component is further configured to transmit Downlink Control Information (DCI) comprising K2 bits of the first sequence, wherein K1+ K2= K.

31. The apparatus according to claim 29 or 30, wherein the processing unit is further configured to determine, for a bit with a value of 0 among the K1 bits, a first transmission power corresponding to the bit with the value of 0, and determine, for a bit with a value of 1 among the K1 bits, a second transmission power corresponding to the bit with the value of 1; and determining downlink precoding of the reference signal on the sub-band corresponding to each bit in the K1 bits according to the uplink precoding, the first transmission power, the second transmission power and the downlink channel matrix on each sub-band, wherein the sub-band is used for uplink transmission by the terminal equipment.

32. The apparatus according to claim 29 or 31, wherein the processing unit is specifically configured to determine the first quantization interval for the uplink power of the terminal device; and performing bit quantization on the labels of the first quantization interval to obtain the first sequence.

33. The apparatus according to claim 30 or 32, wherein said processing unit is specifically configured to quantize the index of the first quantization interval by K bits to obtain the first sequence.

34. The apparatus according to claim 31 or 32, wherein the processing unit is specifically configured to quantize the index of the first quantization interval by Q bits to obtain a second sequence, where Q is a positive integer and Q is smaller than K; and coding the second sequence to obtain a first sequence.

35. The apparatus according to any of claims 29-34, wherein the value of the uplink power is an absolute value or a relative value, and the relative value is an adjustment amount of the uplink power.

36. The apparatus of any one of claims 29-35, wherein the processing unit is further configured to superimpose reference signals for a plurality of terminal devices on a subband used for uplink transmission for the plurality of terminal devices, the plurality of terminal devices including the terminal device.

37. A communications apparatus comprising a processor and a memory, the processor coupled with the memory;

the memory stores a computer program;

a processor for executing a computer program stored in the memory to cause the apparatus to perform the method of any of claims 1-10 or to cause the apparatus to perform the method of any of claims 11-20.

38. A communication device comprising logic circuitry and interface circuitry;

the interface circuit is used for communicating with a module outside the communication device;

the logic circuitry is to execute a computer program to cause the communication apparatus to perform the method of any of claims 1-10 or to cause the communication apparatus to perform the method of any of claims 11-20.

39. A computer-readable storage medium, characterized by comprising a computer program which, when run on a computer, causes the method of any of claims 1-10 to be performed, or causes the method of any of claims 11-20 to be performed.

40. A computer program product, comprising a computer program which, when run on a computer, causes the method of any of claims 1-10 to be performed, or causes the method of any of claims 11-20 to be performed.