CN115276908A

CN115276908A - Wireless communication method and device, and storage medium

Info

Publication number: CN115276908A
Application number: CN202210877837.9A
Authority: CN
Inventors: 汪玲
Original assignee: Zeku Technology Beijing Corp Ltd
Current assignee: Zeku Technology Beijing Corp Ltd
Priority date: 2022-07-25
Filing date: 2022-07-25
Publication date: 2022-11-01
Anticipated expiration: 2042-07-25
Also published as: WO2024021652A1; CN115276908B

Abstract

The application discloses a wireless communication method, equipment and a storage medium, wherein the method comprises the following steps: selecting a first modulation mode set from a plurality of modulation modes supported by the terminal equipment according to the reference channel information; selecting a target modulation mode from the first modulation mode set; and generating a first channel quality indication based on the mutual information corresponding to the target modulation mode.

Description

Wireless communication method and device, and storage medium

Technical Field

The present application relates to mobile communication technologies, and in particular, to a wireless communication method and apparatus, and a storage medium.

Background

Resource scheduling and link adaptation strategies in a Long Term Evolution (LTE)/New Radio (NR) system are completely controlled by a base station, and the base station selects a suitable modulation and coding scheme level for the UE through an uplink Channel Quality Indicator (CQI) or a downlink CQI, so as to achieve the purpose of optimizing system throughput according to Channel quality information and reduce the computation complexity of the CQI.

Disclosure of Invention

Embodiments of the present application provide a wireless communication method and apparatus, and a storage medium, which can reduce the computational complexity of CQI.

The technical scheme of the embodiment of the application is realized as follows:

in a first aspect, an embodiment of the present application provides a wireless communication method, including;

selecting a first modulation mode set from a plurality of modulation modes supported by the terminal equipment according to the reference channel information;

selecting a target modulation mode from the first modulation mode set;

and generating a first channel quality indication based on the mutual information corresponding to the target modulation mode.

In a second aspect, an embodiment of the present application provides a communication device, including a processor configured to:

selecting a target modulation mode from the first modulation mode set;

In a third aspect, an embodiment of the present application provides a communication device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor executes the computer program to implement the steps in the wireless communication method.

In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the computer program implements the above wireless communication method.

In a fifth aspect, a chip provided in an embodiment of the present application is configured to implement the foregoing wireless communication method, where the chip includes: and the processor is used for calling and running the computer program from the memory so that the equipment provided with the chip executes the wireless communication method.

According to the wireless communication method, the wireless communication device and the wireless communication storage medium, a first modulation mode set is selected from a plurality of modulation modes supported by a terminal device according to reference channel information; selecting a target modulation mode from the first modulation mode set; generating a first channel quality indication based on the mutual information corresponding to the target modulation mode; therefore, the modulation mode possibly adopted by the current channel, namely the first modulation mode set, is predicted by referring to the channel information, and the CQI value is calculated based on the predicted first modulation mode set, so that the CQI value is not required to be determined according to all modulation modes supported by the terminal equipment on the basis of not losing the performance of the channel, and the calculation complexity of the CQI is reduced.

Drawings

Fig. 1 is a schematic diagram of an alternative architecture of a communication system provided in an embodiment of the present application;

fig. 2A is a schematic flow chart of an alternative wireless communication method provided in an embodiment of the present application;

fig. 2B is a schematic flow chart of an alternative wireless communication method provided by an embodiment of the present application;

fig. 3 is an alternative flow chart of a wireless communication method provided by an embodiment of the present application;

fig. 4 is an alternative flow chart of a wireless communication method according to an embodiment of the present application;

fig. 5 is an alternative flow chart of a wireless communication method provided by an embodiment of the present application;

fig. 6 is an alternative flow chart of a wireless communication method provided by an embodiment of the present application;

fig. 7 is an alternative flow chart of a wireless communication method according to an embodiment of the present application;

fig. 8 is an alternative flow chart of a wireless communication method provided by an embodiment of the present application;

fig. 9 is a schematic flow chart of an alternative wireless communication method according to an embodiment of the present application;

fig. 10 is a schematic diagram of an alternative structure of a wireless communication device according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

FIG. 12 is a schematic structural diagram of a chip of an embodiment of the present application;

fig. 13 is a schematic block diagram of a communication system according to an embodiment of the present application.

Detailed Description

In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be described in further detail with reference to the attached drawings, the described embodiments should not be considered as limiting the present application, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

The embodiment of the application can be provided as a wireless communication method, a device, equipment and a storage medium. In practical applications, the wireless communication method may be implemented by a wireless communication apparatus, and each functional entity in the wireless communication apparatus may be cooperatively implemented by hardware resources of a computer device (e.g., an electronic device such as a terminal device and a network device), such as a computing resource such as a processor, and a communication resource (e.g., for supporting various modes of communication such as optical cable and cellular).

Of course, the embodiments of the present application are not limited to being provided as methods and hardware, and may be provided as a storage medium (storing instructions for executing the wireless communication method provided by the embodiments of the present application) in various implementations.

Fig. 1 is a schematic diagram of an application scenario of an embodiment of the present application.

As shown in fig. 1, communication system 100 may include a terminal device 110 and a network device 120. Network device 120 may communicate with terminal device 110 over the air. Multi-service transport is supported between terminal device 110 and network device 120.

It should be understood that the embodiment of the present application is only illustrated as the communication system 100, but the embodiment of the present application is not limited thereto. That is to say, the technical solution of the embodiment of the present application can be applied to various communication systems, for example: an LTE System, an LTE Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS), an Internet of Things (IoT) System, a narrowband Internet of Things (NB-IoT) System, an enhanced Machine-Type communication (eMTC) System, a fifth generation (5g) communication System (also referred to as an NR communication System), a future communication System, and the like.

In communication system 100 shown in fig. 1, network device 120 may be an access network device that communicates with terminal device 110. An access network device may provide communication coverage for a particular geographic area and may communicate with terminal devices 110, such as User Equipments (UEs), located within the coverage area.

The Network device 120 may be an evolved node B (eNB or eNodeB) in a Long Term Evolution (Long Term Evolution, LTE) system, or a Next Generation Radio Access Network (NG RAN) device, or a base station (gNB) in an NR system, or a wireless controller in a Cloud Radio Access Network (CRAN), or the Network device 120 may be a relay station, an Access point, a vehicle-mounted device, a wearable device, a hub, a switch, a bridge, a router, or a Network device in a Public Land Mobile Network (PLMN) for future Evolution, or the like.

Terminal device 110 may be any terminal device including, but not limited to, terminal devices that employ wired or wireless connections with network device 120 or other terminal devices.

For example, the terminal device 110 can refer to an access terminal, UE, subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent, or user equipment. An access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, an IoT device, a satellite handset, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handset having Wireless communication capability, a computing device or other processing device connected to a Wireless modem, a vehicle mounted device, a wearable device, a terminal device in a 5G network or a terminal device in a future evolution network, etc.

The terminal Device 110 may be used for Device-to-Device (D2D) communication.

The wireless communication system 100 may further include a core network device 130 in communication with the base station, and the core network device 130 may be a 5G core network (5G core,5 gc) device, such as an Access and Mobility Management Function (AMF), an Authentication Server Function (AUSF), a User Plane Function (User uplink Function, SMF), and a Session Management Function (SMF). Alternatively, the Core network device 130 may also be an Evolved Packet Core (EPC) device of the LTE network, for example, a Session Management Function + Core Packet Gateway (SMF + PGW-C) device of the Core network. It is understood that SMF + PGW-C may perform the functions that SMF and PGW-C can perform simultaneously. In the network evolution process, the core network device may also be called by other names, or a new network entity is formed by dividing the functions of the core network, which is not limited in this embodiment of the present application.

The functional units in the communication system 100 may also establish a connection through a next generation Network (NG) interface to implement communication.

For example, the terminal device establishes an air interface connection with the access network device through the Uu interface, and is used for transmitting user plane data and control plane signaling; the terminal equipment can establish control plane signaling connection with the AMF through an NG interface 1 (N1 for short); an access network device, such as a next generation radio access base station (gNB), may establish a user plane data connection with a UPF through an NG interface 3 (N3 for short); the access network equipment can establish control plane signaling connection with the AMF through an NG interface 2 (N2 for short); UPF can establish control plane signaling connection with SMF through NG interface 4 (N4 for short); the UPF can interact user plane data with a data network through an NG interface 6 (N6 for short); the AMF can establish a control plane signaling connection with the SMF through an NG interface 11 (N11 for short); the SMF may establish a control plane signaling connection with the PCF via NG interface 7 (N7 for short).

Fig. 1 exemplarily shows one base station, one core network device, and two terminal devices, alternatively, the wireless communication system 100 may include a plurality of base stations and may include other numbers of terminal devices within the coverage area of each base station, which is not limited in this embodiment of the present invention.

For the convenience of understanding of the technical solutions of the embodiments of the present application, the following related technologies of the embodiments of the present application are described below, and the following related technologies may be optionally combined with the technical solutions of the embodiments of the present application as alternatives, and all of them belong to the protection scope of the embodiments of the present application.

It should be noted that fig. 1 illustrates a system to which the present application is applied by way of example, and of course, the method shown in the embodiment of the present application may also be applied to other systems. Further, the terms "system" and "network" are often used interchangeably herein. The term "and/or" herein is merely an association relationship describing an associated object, and means that there may be three relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship. It should also be understood that "indication" mentioned in the embodiments of the present application may be a direct indication, an indirect indication, or an indication of an association relationship. For example, a indicates B, which may indicate that a directly indicates B, e.g., B may be obtained by a; it may also mean that a indicates B indirectly, for example, a indicates C, and B may be obtained by C; it can also mean that there is an association between a and B. It should also be understood that "correspond" mentioned in the embodiments of the present application may mean that there is a direct or indirect correspondence between the two, and may also mean that there is an association relationship between the two, and may also be a relationship of indicating and being indicated, configuring and being configured, and the like. It should also be understood that "predefined" or "predefined rule" mentioned in the embodiments of the present application may be implemented by pre-storing corresponding codes, tables or other manners that can be used to indicate related information in devices (e.g., including terminal devices and network devices), and the present application is not limited to the specific implementation manner thereof. Such as predefined, may refer to what is defined in the protocol. It should also be understood that, in the embodiment of the present application, the "protocol" may refer to a standard protocol in the field of communications, and may include, for example, an LTE protocol, an NR protocol, and a related protocol applied in a future communication system, which is not limited in this application.

For convenience of understanding of technical solutions of the embodiments of the present application, the following description is provided for related technologies of the embodiments of the present application, and the following related technologies may be arbitrarily combined with the technical solutions of the embodiments of the present application as alternatives, which all belong to the protection scope of the embodiments of the present application.

The resource scheduling and link self-adaptive strategy in the LTE/NR system is completely controlled by the base station, and the base station selects a proper modulation coding mode grade for the UE according to the value of the uplink CQI or the downlink CQI so as to achieve the aim of optimizing the system throughput according to the channel quality information. Understandably, the modulation coding scheme level can indicate the modulation scheme and the coding rate.

For the uplink CQI, that is, the CQI measured by the base station, the base station measures a Signal to Interference plus Noise Ratio (SINR) value representing link quality information through a Sounding Reference Signal (SRS), calculates the CQI value according to the SINR value, and selects an appropriate frequency domain resource and modulation and coding scheme level for the UE according to the CQI value. As shown in fig. 2A, the base station 210 obtains an SRS measurement result through measurement by the physical layer 211, sends the SRS measurement result to the Medium Access Control (MAC) layer 212, and the MAC layer 212 obtains a CQI value based on the SRS measurement result and determines a modulation and coding scheme level, a time-frequency resource position, and a Redundancy Version (RV) Version number based on the CQI value. Optionally, the physical layer 211 also reports Cyclic Redundancy Check (CRC) Check information to the layer 212.

For downlink CQI, namely CQI calculated by the terminal, the terminal firstly calculates the value of the CQI and feeds the CQI back to the base station through an uplink channel, and then the base station selects proper frequency domain resources for the UE according to the value of the CQI fed back, and modulates the coding mode grade and the transmission mode. As shown in fig. 2B, the physical layer 221 of the UE220 calculates a CQI value and sends the CQI value to the physical layer 211 of the base station 210, the physical layer 211 sends the received CQI value to the MAC layer 212, and the MAC layer 212 selects the following for the UE220 according to the CQI value fed back by the UE: a transmission mode, a Multiple-Input Multiple-Output (MIMO) mode, a modulation coding mode level, a time-frequency resource position and an RV version number.

In the embodiment of the present application, an uplink CQI, that is, an uplink CQI or a downlink CQI, that is, a downlink CQI is described as a CQI in a unified manner, where the uplink CQI refers to a CQI calculated by a base station through a measured equivalent SINR value, and the downlink CQI refers to a CQI fed back to the base station by a UE.

When calculating the CQI, the UE or the base station maps the detected SINR value to obtain an MI value in a SINR to Mutual Information (MI) mapping manner, or maps the detected SINR value to MI value in a capacity to MI mapping manner according to the channel capacity, where the MI value corresponds to an actual Modulation method, for example, the upper limit of the MI value corresponding to Quadrature-Phase Shift keying (QPS K) Modulation is 2, the upper limit of the MI value corresponding to 16 Quadrature Amplitude Modulation (QAM) is 4, the upper limit of the MI value corresponding to 64QAM is 6, and the upper limit of the MI value corresponding to 256QAM is 8, so that the corresponding MI values need to be calculated respectively for different Modulation methods during the SINR value or capacity mapping process, and finally, all Modulation methods need to be traversed to obtain the maximum MI value when calculating the final SINR value, and the final MI value is up to the CQI value. The modulation modes supported by the UE comprise: QPSK, 1694am, 64qam,256QAM, for example, the implementation process of calculating the CQI value is shown in fig. 3:

s301, calculating the value of the equivalent signal-to-noise ratio or the value of the capacity according to the equivalent channel state information.

According to equivalent channel state information H_eq,iA value of an equivalent signal-to-noise ratio or a value of capacity corresponding to minimum mean-square error (MMSE) detection or Sphere Decoder (SD) detection is calculated.

Alternatively, the value of the equivalent signal-to-noise ratio is calculated by formula (1), and the value of the capacity is calculated by formula (1) and formula (2):

C_i,l＝log2(1+γ_i,l) Formula (2);

wherein, i is a sample value point index, the value of i is less than the number N of sample value points in the sub-band or the broadband, l is a layer number index, and the value of l can be equal to 1 or less than 1. Gamma ray_i,lIs the equivalent signal-to-noise ratio, C, corresponding to the number l of the layers of the sample value point i_i,lThe capacity corresponding to the number l of the sampling point I is shown, and I is an identity matrix.

Here, the number of sample points is the number of subcarriers, the number of layers refers to the value of a supported rank (rank), which is used to indicate the number of streams of the maximum MIMO supported by the terminal, i.e. how many data streams the terminal device can transmit, where the rank of rank is understood as the number of transmission layers.

S302, traversing all the modulation modes, and determining MI values corresponding to the modulation modes according to the value of the equivalent signal-to-noise ratio or the value of the capacity.

Here, the MI value is a subband or wideband MI value.

In S302, as shown in fig. 4, the method includes:

s3021, setting m as 1 initially;

s3022, calculating a value of MI corresponding to the mth modulation mode;

after the MI value corresponding to the mth modulation mode is calculated, if the value of m is smaller than the maximum value of m, S3023 is executed, otherwise, it is considered that all modulation modes are traversed, and the MI values corresponding to all modulation modes are calculated.

And S3023, adding 1 to the value of m.

And adding 1 to the value of m, and continuing to execute S2023 to calculate the value of MI corresponding to the mth modulation mode.

Here, the value range of m is determined based on the number of modulation modes supported by the terminal device, and if the terminal device supports 4 modulation modes, the value of m is 1 to 4.

For the mth modulation scheme of all modulation schemes, the value of MI corresponding to the mth modulation scheme is calculated through steps S30221 and S30222 shown in fig. 5, where m is 1 to 4, m is 1, m is QPSK, m is 2, m is 1694am, m is 3, m is 64qam, and m is 4, m is 256QAM.

As shown in fig. 5, the calculation of the MI value corresponding to the m-th modulation scheme includes the following steps:

s30221, mapping the equivalent SINR value or capacity value to the MI value.

The equivalent SINR value is mapped to the value of MI as shown in equation (3) or the value of capacity is mapped to the value of MI as shown in equation (4):

wherein the content of the first and second substances,

and (3) the MI corresponding to the layer number l of the sample value point i in the m-th modulation mode is shown.

S30222, the MI values at the various value points are accumulated to obtain the MI value corresponding to the m-th modulation scheme.

MI value corresponding to m-th modulation mode

Is calculated as shown in equation (5):

s303, select the maximum MI value from the MI values corresponding to all modulation schemes as the final MI value.

Final MI value

Can be expressed as equation (6):

s304, obtaining a corresponding CQI value according to the MI value and the MI-to-CQI mapping.

In the process of mapping from the SINR value or the capacity value to MI and MI accumulation of sample value points, mapping needs to be performed for all modulation modes, for example, a UE supports 64QAM to the maximum, mapping needs to be performed for 3 modulation modes, and a UE supports 256QAM to the maximum, mapping needs to be performed for 4 modulation modes, and when the UE supports 1024QAM, mapping needs to be performed for 5 modulation modes, and complexity increases linearly with the increase of modulation modes.

Embodiments of a wireless communication method, an apparatus, a device, and a storage medium according to the embodiments of the present application are described below with reference to a schematic diagram of a communication system shown in fig. 1.

The wireless communication method provided in the embodiment of the present application is applied to a communication device, where the communication device may be a terminal device or a network device, as shown in fig. 6, and includes:

s601, the communication device selects a first modulation scheme set from multiple modulation schemes supported by the terminal device according to the reference channel information.

The communication equipment selects a part of modulation modes from a plurality of modulation modes supported by the terminal equipment to form a first modulation mode set, and the first modulation mode set comprises one or more modulation modes.

In one example, the modulation schemes supported by the terminal device include: QPSK,16QAM,64QAM,256QAM, the first set of modulation schemes selected by the communication device from the modulation schemes supported by the terminal device comprises the following modulation schemes: QPSK,16QAM,64 QAM.

In the embodiment of the present application, the selection manner for the communication device to select the first modulation scheme set from the modulation schemes supported by the terminal device may support one or more of the following:

selecting a first mode and randomly selecting;

and selecting the second selection mode according to the reference channel information.

In the second option, the reference channel information may be a priori channel information. Alternatively, the reference channel information may include: one or more of a signal-to-noise ratio of a signal sent by the network device and a second CQI, where the signal-to-noise ratio of the signal sent by the network device may be determined by Channel State Information (CSI), and the second CQI is a previous CQI corresponding to the terminal device.

In the embodiment of the present application, the selection method for selecting the first modulation scheme set by the communication device is not limited at all.

In this embodiment, when the communication device selects the first modulation scheme set from the modulation schemes supported by the terminal device, part of the modulation schemes may be directly selected from the modulation schemes supported by the terminal device to form the first modulation scheme set, or the modulation schemes supported by the terminal device may be divided into a plurality of different candidate modulation scheme sets, and the first modulation scheme set may be selected based on the plurality of candidate modulation scheme sets.

Under the condition that a plurality of modulation modes supported by the terminal equipment are divided into at least two candidate modulation mode sets, the union of the modulation modes included in the at least two candidate modulation mode sets is all the modulation modes supported by the terminal equipment, and the modulation modes included in different candidate modulation mode sets are different, wherein one candidate modulation mode set comprises at least one modulation mode supported by the terminal equipment.

The first modulation scheme set selected by the communication device may be a candidate modulation scheme set of the multiple candidate modulation scheme sets, or may be a subset of a candidate modulation scheme set of the multiple candidate modulation scheme sets.

In one example, the modulation schemes supported by the terminal device include: the modulation mode supported by the terminal equipment is divided into the following two candidate modulation mode sets: the modulation scheme set comprises a candidate modulation scheme set 1 including a first modulation scheme and a second modulation scheme, and a candidate modulation scheme set 2 including a second modulation scheme, a third modulation scheme and a fourth modulation scheme, wherein a target modulation scheme set is the candidate modulation scheme set 2, and at least one target modulation scheme comprises the following steps: modulation mode two, modulation mode three and modulation mode four.

In one example, the modulation schemes supported by the terminal device include: the modulation mode supported by the terminal equipment is divided into the following two candidate debugging mode sets: the modulation scheme selection method comprises a candidate modulation scheme set 1 comprising a first modulation scheme and a second modulation scheme, and a candidate modulation scheme set 2 comprising a second modulation scheme, a third modulation scheme and a fourth modulation scheme, wherein a target modulation scheme set is a subset { modulation scheme three, modulation scheme four } of the candidate modulation scheme set 2, and at least one target modulation scheme comprises the following steps: modulation mode three and modulation mode four.

In some embodiments, at least one of the following sets of different candidate modulation schemes is different:

the parameter 1 and the maximum modulation order are the maximum modulation order in the modulation orders corresponding to the modulation modes included in the candidate modulation mode set;

parameter 2, a minimum modulation order, where the minimum modulation order is a minimum modulation order in modulation orders corresponding to the modulation modes included in the candidate modulation mode set;

parameter 3, number of modulation schemes included.

For the parameter 1, the maximum modulation order of a candidate modulation mode set is the maximum modulation order in the modulation orders corresponding to the modulation modes included in the candidate modulation mode set. Understandably, the modulation order corresponding to the modulation mode represents the number of bits transmitted by the next symbol in the modulation mode, for example: the QPSK corresponds to a modulation order of 2, the 16QAM corresponds to a modulation order of 4, the 64QAM corresponds to a modulation order of 6, and the 256QAM corresponds to a modulation order of 8.

In one example, the candidate modulation scheme set a includes QPSK and 16QAM, and the maximum modulation order of the candidate modulation scheme set a is 4.

For the parameter 2, the minimum modulation order of a candidate modulation mode set is the minimum modulation order in the modulation orders corresponding to the modulation modes included in the candidate modulation mode set.

In one example, the candidate modulation scheme set a includes QPSK and 16QAM, and the minimum modulation order of the candidate modulation scheme set a is 2.

In the embodiment of the present application, in at least two candidate modulation mode sets divided by multiple modulation modes supported by a terminal device, one or more parameters among parameter 1, parameter 2, and parameter 3 of different candidate modulation mode sets are different.

In one example, the modulation schemes supported by the terminal device include: QPSK,16QAM,64QAM,256QAM, and at least two candidate modulation scheme sets include a candidate modulation scheme set 1 and a candidate modulation scheme set 2, where the candidate modulation scheme set 1 includes the following modulation schemes: QPSK,16QAM,64QAM, the candidate modulation scheme set 2 includes the following modulation schemes: 16QAM,64QAM, and 256QAM, in this case, the maximum modulation order and the minimum modulation order of the candidate modulation scheme set 1 and the candidate modulation scheme set 2 are different, the maximum modulation order of the candidate modulation scheme set 1 is 6, the minimum modulation order of the candidate modulation scheme set 1 is 2, the maximum modulation order of the candidate modulation scheme set 2 is 8, and the minimum modulation order of the candidate modulation scheme set 2 is 4.

In one example, the modulation schemes supported by the terminal device include: QPSK,16QAM,64QAM,256QAM, and at least two candidate modulation scheme sets include a candidate modulation scheme set 1 and a candidate modulation scheme set 2, where the candidate modulation scheme set 1 includes the following modulation schemes: 16QAM,64QAM, and the candidate modulation scheme set 2 includes the following modulation schemes: 16QAM,64QAM, and 256QAM, in this case, the maximum modulation orders of the candidate modulation scheme set 1 and the candidate modulation scheme set 2 are different from the number of included modulation schemes, the maximum modulation order of the candidate modulation scheme set 1 is 6, the number of modulation schemes included in the candidate modulation scheme set 1 is 2, the maximum modulation order of the candidate modulation scheme set 2 is 8, and the number of modulation schemes included in the candidate modulation scheme set 2 is 3.

S602, the communication device selects a target modulation mode from the first modulation mode set.

When the first modulation scheme set includes one modulation scheme, the communication device determines the modulation scheme as a target modulation scheme, and calculates a first CQI that is a current CQI of the channel based on the target modulation scheme.

When the first modulation scheme set includes a plurality of modulation schemes, the communication device selects one modulation scheme from the first modulation scheme set as a target modulation scheme, and calculates the first CQI based on the target modulation scheme.

In one example, the modulation schemes supported by the terminal device include: QPSK,16QAM,64QAM,256QAM, the first set of modulation schemes selected by the communication device from the modulation schemes supported by the terminal device is { QPSK,16qam,64qam }, in which case the communication device selects 16QAM from the first set of modulation schemes { QPSK,16qam,64qam } as the target modulation scheme and calculates the first CQI based on 16QAM, without requiring all modulation schemes supported by the terminal device: QPSK,16QAM,64QAM,256QAM, to select the target modulation scheme.

S603, the communication equipment generates a first CQI based on the MI corresponding to the target modulation mode.

The communication device selects a target modulation scheme from a plurality of modulation schemes supported by the terminal device, and then calculates a first CQI based on the target modulation scheme. Understandably, the first CQI is used for the base station to select at least one of the following for the terminal device: frequency domain resource, modulation mode and transmission mode. Wherein the transmission mode indicates a size of the data block.

It is to be understood that the value of the first CQI is used to reflect the channel quality of the first channel of the terminal device. The first channel is a channel for the terminal device to perform uplink service or downlink service. Optionally, the first channel comprises: a Physical Downlink Shared Channel (PDSCH), a Physical Uplink Shared Channel (PUSCH), and the like.

Optionally, the communication device is a network device, the first CQI belongs to an uplink CQI, and correspondingly, the first CQI belongs to an uplink CQI.

Optionally, the communication device is the terminal device, the first CQI belongs to a downlink CQI, and correspondingly, the first CQI belongs to a downlink CQI.

According to the wireless communication method provided by the embodiment of the application, a first modulation mode set is selected from a plurality of modulation modes supported by terminal equipment according to reference channel information; selecting a target modulation mode from the first modulation mode set; generating a first CQI based on the MI corresponding to the target modulation mode; therefore, the modulation mode possibly adopted by the current channel, namely the first modulation mode set, is predicted by referring to the channel information, and the CQI value is calculated based on the predicted first modulation mode set, so that the CQI value is not required to be determined according to all modulation modes supported by the terminal equipment on the basis of not losing the performance of the channel, and the calculation complexity of the CQI is reduced.

In some embodiments, the manner in which the communication device selects the first modulation scheme set from the plurality of modulation schemes supported by the terminal device according to the reference channel information in S601 may include at least one of:

selecting the first modulation mode set from a plurality of modulation modes according to the signal-to-noise ratio of a signal sent by network equipment;

and selecting the first modulation mode set from the plurality of modulation modes according to a second CQI.

For the mode one

The reference channel information includes a signal-to-noise ratio (snr) of a signal sent by the network device, the SINR of the signal sent by the network device may be indicated by CSI, and the CSI is information that represents propagation characteristics of a channel and is reported to the base station by the terminal device and may be obtained based on measurement of a pilot signal or a data signal sent by the base station. The CSI is used to determine information representing the state of the channel, such as Reference Signal Receiving Power (RSRP) of the channel, the number of transmission layers, and the like.

The communication equipment determines the value of the signal-to-noise ratio of the signal sent by the network equipment through the RSRP indicated by the CSI, and selects a first modulation mode set from a plurality of modulation modes supported by the terminal equipment based on the value of the signal-to-noise ratio of the signal sent by the network equipment.

Optionally, the communication device determines the value of the signal-to-noise ratio SINR of the signal sent by the network device by equation (7):

wherein N is_pwrThe power of the interference plus noise is characterized.

In some embodiments, the implementation of selecting the first modulation scheme set from the plurality of modulation schemes based on a signal-to-noise ratio of a signal transmitted by the network device comprises: and selecting the first modulation mode set from the plurality of modulation modes according to the comparison between the signal-to-noise ratio of the signal and at least one target signal-to-noise ratio threshold value.

The communication equipment compares the SINR value indicated by the CSI with at least one target signal-to-noise ratio threshold value, thereby determining the relationship between the signal-to-noise ratio value and each target signal-to-noise ratio threshold value, and selects a first modulation mode set from a plurality of modulation modes based on the relationship between the signal-to-noise ratio value and each target signal-to-noise ratio threshold value.

Optionally, the plurality of modulation modes are divided into a plurality of candidate modulation mode sets, and the communication device selects the first modulation mode set from the plurality of candidate modulation mode sets according to a comparison between the signal-to-noise ratio of the signal and at least one target signal-to-noise ratio threshold value.

In one example, the modulation schemes supported by the terminal device include: the modulation mode supported by the terminal equipment is divided into the following two candidate debugging mode sets: the communication device selects the candidate modulation mode set 2 as a first modulation mode set based on the SINR, wherein the candidate modulation mode set 1 comprises a first modulation mode and a second modulation mode, and the candidate modulation mode set 2 comprises a second modulation mode, a third modulation mode and a fourth modulation mode.

Optionally, at least one target snr threshold is a set fixed snr threshold.

Optionally, the at least one target snr threshold value has an association relationship with a first number, where the first number is a number of transmission layers indicated by the CSI.

And under the condition that the at least one target signal-to-noise ratio threshold value has an association relation with the first number, selecting the at least one target signal-to-noise ratio threshold value used by the first modulation mode set as the at least one signal-to-noise ratio threshold value corresponding to the first number. At this time, the communication device selects at least one signal-to-noise ratio threshold value corresponding to the number of transmission layers indicated by the CSI as a target signal-to-noise ratio threshold value. It can be understood that the number of transmission layers indicated by CSI is the value of rank indicated by CSI.

Taking the number of the threshold values of the signal to noise ratio corresponding to the number of transmission layers as 1, the value of rank is 1, and the corresponding threshold value of the signal to noise ratio is SINR₁The rank value is 2, and the corresponding threshold value of the signal-to-noise ratio is SINR₂The rank value is 3, and the corresponding threshold value of signal-to-noise ratio is SINR₃The rank value is 4, and the corresponding threshold value of signal-to-noise ratio is SINR₄(ii) a If the rank value indicated by the CSI is 4, the target signal-to-noise ratio threshold value for selecting the first modulation mode set comprises SINR₄。

Taking the number of the threshold values of the signal to noise ratio corresponding to the number of transmission layers as 2 as an example, the value of rank is 1, and the corresponding threshold values of the signal to noise ratio include SINR₁₁And SINR₁₂And SINR₁₁Less than SINR₁₂The rank value is 2, and the corresponding threshold value of the signal-to-noise ratio comprises SINR₂₁And SINR₂₂And SINR₂₁Less than SINR₂₂The rank value is 3, and the corresponding SNR threshold value comprises SINR₃₁And SINR₃₂And SINR₃₁Less than SINR₃₂The rank value is 4, and the corresponding SNR threshold value comprises SINR₄₁And SINR₄₂And SINR₄₁Less than SINR₄₂(ii) a If the rank value indicated by the CSI is 4, the target signal-to-noise ratio threshold value for selecting the first modulation mode set comprises SINR₄₁And SINR₄₂。

In the embodiment of the present application, when the first modulation scheme set is selected based on the SINR indicated by the CSI, different signal-to-noise ratio thresholds are used to compare with the signal-to-noise ratio corresponding to the CSI based on the difference in the number of transmission layers, so that the first modulation scheme set is selected based on the difference in channel quality by using different signal-to-noise ratio thresholds, so that the first modulation scheme set suitable for the current channel quality is selected.

Optionally, at least one target snr threshold corresponding to different number of transmission layers is different.

The different at least one snr threshold for different number of transmission layers may be understood as that at least one snr for different transmission layers is independent of each other. And when the transmission layer numbers indicated by the CSI are different, the target signal-to-noise ratio threshold values determined by the first equipment are different.

Taking the number of the threshold values of the signal to noise ratio corresponding to the number of transmission layers as 1, the value of rank is 1, and the corresponding threshold value of the signal to noise ratio is SINR₁The rank value is 2, and the corresponding threshold value of the signal-to-noise ratio is SINR₂The rank value is 3, and the corresponding threshold value of the signal to noise ratio is SINR₃The rank value is 4, and the corresponding threshold value of the signal-to-noise ratio is SINR₄(ii) a If the transmission layer indicated by the CSI is 1, the target signal-to-noise ratio threshold value is SINR₁(ii) a If the transmission layer indicated by the CSI is 2, the target signal-to-noise ratio threshold value is SINR₂(ii) a If the transmission layer indicated by the CSI is 3, the target signal-to-noise ratio threshold value is SINR₃(ii) a If the transmission layer indicated by the CSI is 4, the target signal-to-noise ratio threshold value is SINR₄。

Optionally, the larger the number of transmission layers is, the larger the snr threshold value at the same position in the corresponding at least one snr threshold value is. The position of the signal-to-noise ratio threshold value in the at least one signal-to-noise ratio threshold value is determined based on the magnitude of each signal-to-noise ratio threshold value in the at least one signal-to-noise ratio threshold value.

Taking the number of the threshold values of the signal to noise ratio corresponding to the number of transmission layers as 1, the value of rank is 1, and the corresponding threshold value of the signal to noise ratio is SINR₁The rank value is 2, and the corresponding threshold value of the signal-to-noise ratio is SINR₂The rank value is 3, and the corresponding threshold value of the signal to noise ratio is SINR₃The rank value is 4, and the corresponding threshold value of signal-to-noise ratio is SINR₄Then, the sequence of the snr thresholds corresponding to the transmission layers from large to small is: SINR₄、SINR₃、SINR₂、SINR₁。

Taking the number of the snr thresholds corresponding to the number of transmission layers as 2 as an example,the rank value is 1, and the corresponding SNR threshold value comprises SINR₁₁And SINR₁₂And SINR₁₁Less than SINR₁₂The rank value is 2, and the corresponding SNR threshold value comprises SINR₂₁And SINR₂₂And SINR₂₁Less than SINR₂₂The rank value is 3, and the corresponding threshold value of the signal-to-noise ratio comprises SINR₃₁And SINR₃₂And SINR₃₁Less than SINR₃₂The rank value is 4, and the corresponding SNR threshold value comprises SINR₄₁And SINR₄₂And SINR₄₁Less than SINR₄₂Then, the smaller snr thresholds corresponding to the transmission layers are sorted from large to small as follows: SINR₄₁、SINR₃₁、SINR₂₁、SINR₁₁The sequencing of the larger SNR threshold values corresponding to the transmission layer numbers from large to small is as follows: SINR₄₂、SINR₃₂、SINR₂₂、SINR₁₂。

In some embodiments, the selecting the first modulation scheme set from the at least two candidate modulation scheme sets according to the relationship between the SINR value and at least one target snr threshold value includes: determining at least two signal-to-noise ratio ranges based on the at least one target signal-to-noise ratio threshold value; determining a target signal-to-noise ratio range to which the value of the SINR in the at least two signal-to-noise ratio ranges belongs; and determining a candidate modulation mode corresponding to the target signal-to-noise ratio range in at least two candidate modulation mode sets as the first modulation mode set.

The communication device can obtain at least two signal-to-noise ratio ranges based on at least one target signal-to-noise ratio threshold value, and different signal-to-noise ratio ranges correspond to different candidate modulation mode sets in the at least two candidate modulation mode sets. Optionally, the larger the signal-to-noise ratio is, the larger the maximum modulation order of the candidate modulation mode set corresponding to the larger signal-to-noise ratio range is.

The communication equipment compares the signal-to-noise ratio of a signal sent by the network equipment with at least one target signal-to-noise ratio threshold value, determines a target signal-to-noise ratio range in at least two signal-to-noise ratio ranges according to the relation between the SINR value and each target signal-to-noise ratio threshold value in the at least one target signal-to-noise ratio threshold value, and determines a candidate modulation mode set corresponding to the target signal-to-noise ratio range as a first modulation mode set. Wherein the value of the signal-to-noise ratio belongs to a target signal-to-noise ratio range.

At least one target signal-to-noise ratio threshold value comprises: SINR₄₁And SINR₄₂And SINR₄₁Less than SINR₄₂For example, based on SINR₄₁And SINR₄₂The following three signal-to-noise ratio ranges are determined: noise ratio range 1 (less than SINR)₄₁) Noise ratio range 2 (SINR)₄₁And SINR₄₂Middle), noise ratio range 3 (greater than SINR)₄₂) The noise ratio range corresponds to the candidate modulation mode set 1, the noise ratio range 2 corresponds to the candidate modulation mode set 2, and the noise ratio range 3 corresponds to the candidate modulation mode set 3; if the value of the signal-to-noise ratio falls within the range of 3, i.e. the value of the signal-to-noise ratio is greater than the SINR₄₂Then the first modulation scheme set is the candidate modulation scheme set 3. It can be understood that the two thresholds in the embodiment of the present application include the two thresholds themselves, for example: the value of the signal-to-noise ratio is located at the SINR₄₁And SINR₄₂In between, a value that can be understood as the signal-to-noise ratio belongs to [ SINR₄₁，SINR₄₂]。

In some embodiments, the at least one target snr threshold value includes a first target snr threshold value, the at least two candidate modulation scheme sets include a first candidate modulation scheme set and a second candidate modulation scheme set, the first candidate modulation scheme set and the second candidate modulation scheme set include the same number of modulation schemes, a maximum modulation order of the first candidate modulation scheme set is smaller than a maximum modulation order of the second candidate modulation scheme set, and a minimum modulation order of the first candidate modulation scheme set is smaller than a minimum modulation order of the second candidate modulation scheme set; if the signal-to-noise ratio value is smaller than the first target signal-to-noise ratio threshold value, the first modulation mode set is the first candidate modulation mode set; and if the signal-to-noise ratio value is greater than or equal to the first target signal-to-noise ratio threshold value, the first modulation mode set is the second candidate modulation mode set.

At this time, the target signal-to-noise ratio threshold value included in the at least one target signal-to-noise ratio threshold value is a first target signal-to-noise ratio threshold value, and two signal-to-noise ratio ranges are determined based on the first target signal-to-noise ratio threshold value: the modulation method is smaller than a first target signal-to-noise ratio threshold value (a first signal-to-noise ratio range) and larger than or equal to a first target signal-to-noise ratio threshold value (a second signal-to-noise ratio range), the first signal-to-noise ratio range corresponds to a first candidate modulation mode set, and the second signal-to-noise ratio range corresponds to a second candidate modulation mode set.

The number of the debugging modes included in the first candidate modulation mode set and the second candidate modulation mode set is the same, and the maximum modulation order and the minimum modulation order of the second candidate modulation mode set are respectively greater than the maximum modulation order and the minimum modulation order of the first candidate modulation mode set,

in an example, the highest modulation mode supported by the terminal device is 256QAM, the first set of candidate modulation modes is { QPSK,16qam,64qam }, and the second set of candidate modulation modes is {16qam,64qam,256qam }. Understandably, the modulation schemes supported by the terminal device include the highest modulation scheme supported by the terminal and all modulation schemes lower than the highest modulation scheme supported by the terminal.

The communication device compares the SINR value of the signal sent by the network device with a first target signal-to-noise ratio threshold value, if the SINR value is smaller than the first target signal-to-noise ratio threshold value, that is, the target signal-to-noise ratio range is the first signal-to-noise ratio range, the first modulation mode set is a first candidate modulation mode set, and if the SINR value is greater than or equal to the first target signal-to-noise ratio threshold value, that is, the target signal-to-noise ratio range is the second signal-to-noise ratio range, the first modulation mode set is a second candidate modulation mode set.

In the wireless communication method provided in the embodiment of the present application, a signal-to-noise ratio of a signal sent by a network device is used to determine a range of current channel quality in advance, and a first modulation mode set is selected based on the range of channel quality, where when the channel quality is good, a candidate modulation mode set corresponding to a modulation mode with a high modulation order is selected, and when the channel quality is poor, a candidate modulation mode set corresponding to a modulation mode with a low modulation order is selected, so that a modulation mode matched with the channel quality is selected based on the channel quality, and channel transmission efficiency is improved.

For the second mode

The second CQI is a previous CQI corresponding to the terminal device, that is, a CQI value closest to the current time among values of the historical CQIs calculated by the communication device. The value of the second CQI may be understood as a CQI level of the second CQI.

In some embodiments, selecting, by the second method, an implementation of the first modulation scheme set from the plurality of modulation schemes according to the second CQI includes: and selecting the first modulation mode set from a plurality of modulation modes according to the relation between the second CQI and at least one CQI threshold value.

Optionally, the multiple modulation modes are divided into multiple candidate modulation mode sets, and the communication device selects the first modulation mode set from the multiple candidate modulation mode sets according to comparison between the second CQI and at least one target snr threshold.

The communication device compares the second CQI value with at least one CQI threshold value to determine a relationship between the second CQI value and each CQI threshold value, and selects a first modulation scheme set from the at least two candidate modulation scheme sets based on the relationship between the second CQI value and each CQI threshold value.

Optionally, at least one CQI threshold value is a set fixed CQI threshold value.

Optionally, the at least one CQI threshold value is determined as a variation of values of two adjacent CQIs in the historical CQI.

In an example, the value range of the CQI is 1 to 15, and the variation of the values of the CQI reported twice in adjacent time does not exceed 5, and the at least one CQI threshold value includes: 6 and 10.

In some embodiments, the selecting the first modulation scheme set from the at least two candidate modulation scheme sets according to a relationship between the value of the second CQI and at least one CQI threshold value includes: determining at least two CQI ranges based on the at least one CQI threshold value; determining a target CQI range to which the value of the second CQI belongs among the at least two CQI ranges; and determining a candidate modulation mode corresponding to the target CQI range in at least two candidate modulation mode sets as the first modulation mode set.

The communication device can obtain at least two CQI value ranges based on at least one CQI threshold value, and different CQI value ranges correspond to different candidate modulation mode sets in at least two candidate modulation mode sets.

The communication equipment compares the second CQI value with at least one CQI threshold value, determines a target CQI value range to which the second CQI belongs in at least two CQI value ranges according to the relationship between the second CQI value and each CQI threshold value in the at least one CQI threshold value, and determines a candidate modulation mode set corresponding to the target CQI value range as a first modulation mode set.

In an example, the at least one CQI threshold value comprises: CQI₁Based on CQI₁Determining the following two CQI value ranges: CQI span 1 (less than CQI)₁) CQI value range 2 (greater than or equal to CQI)₁) And the CQI value range 1 corresponds to the candidate modulation scheme set 1, the CQI value range 2 corresponds to the candidate modulation scheme set 2, and if the second CQI value belongs to the CQI value range 2, the second CQI value is greater than or equal to the CQI value set 1, that is, the second CQI value is greater than or equal to the CQI value set 2₁Then the first modulation scheme set is the candidate modulation scheme set 2.

In an example, the at least one CQI threshold value comprises: CQI₁And CQI₂Based on CQI₁And CQI₂The following three CQI value ranges are determined: CQI value range 1 (less than CQI)₁) CQI value range 2 (CQI)₁And CQI₂In between), CQI value range 3 (greater than or equal to CQI)₂) And the CQI value range 1 corresponds to the candidate modulation mode set 1, the CQI value range 2 corresponds to the candidate modulation mode set 2, the CQI value range 3 corresponds to the candidate modulation mode set 3, if the second CQI value belongs to the CQI value range 2, the second CQI value is in the CQI value range₁And CQI₂In between, the first modulation scheme set is the candidate modulation scheme set 2.

In some embodiments, the at least one CQI threshold value comprises: a first CQI threshold value and a second CQI threshold value, where the first CQI threshold value is smaller than the second CQI threshold value, the at least two candidate modulation mode sets include a third candidate modulation mode set and a fourth candidate modulation mode set, the third candidate modulation mode set and the fourth candidate modulation mode set include the same number of modulation modes, a maximum modulation order of the third candidate modulation mode set is smaller than a maximum modulation order of the fourth candidate modulation mode set, and a minimum modulation order of the third candidate modulation mode set is smaller than a minimum modulation order of the fourth candidate modulation mode set; if the second CQI value is less than the first CQI threshold value, the first modulation scheme set is the third candidate modulation scheme set; if the second CQI value is between the first CQI threshold value and the second CQI threshold value, the first modulation scheme set is a first modulation scheme set selected last time; if the second CQI value is greater than the second CQI threshold value, the first modulation scheme set is the fourth candidate modulation scheme set.

At this time, the communication device determines two CQI value ranges based on the first CQI threshold value and the second CQI threshold value: the modulation mode selection range is smaller than a first CQI threshold value (a first CQI value range), is between the first CQI threshold value and a second CQI threshold value (a second CQI value range), and is larger than a second CQI threshold value (a third CQI value range), the first CQI value range corresponds to a third candidate modulation mode set, the candidate modulation mode set corresponding to the second CQI value range is the same as the first modulation mode set selected at the last time, and the third CQI value range corresponds to a fourth candidate modulation mode set. It can be understood that the first modulation scheme set selected last time by the communication device is the modulation scheme set used for calculating the first CQI in the at least two candidate modulation scheme sets.

Optionally, when the value range of the CQI is 1 to 15, the first CQI threshold value is 5, and the second CQI threshold value is 10.

According to the wireless communication method provided by the embodiment of the application, the modulation mode possibly adopted by the current channel is judged in advance by using the value of the CQI calculated last time, and the value of the CQI is calculated at the current time based on the judged modulation mode possibly adopted by the current channel, so that the complexity of CQI calculation is reduced on the basis of not losing the performance of the channel.

In this embodiment, the communication device may support selection of the first modulation scheme set by using one or two information of a signal-to-noise ratio and a second CQI of a signal sent by the network device.

In some embodiments, the selecting, by the communication device in S601, the first modulation scheme set from the multiple modulation schemes supported by the terminal device according to the reference channel information may further include at least one of:

selecting a second modulation mode set from the plurality of modulation modes according to the signal-to-noise ratio of the signal sent by the network equipment; and selecting the first modulation mode set from the modulation modes included in the second modulation mode set according to the second CQI.

Selecting a second modulation mode set from the plurality of modulation modes according to a second CQI; and selecting the first modulation mode set from the modulation modes included in the second modulation mode set according to the signal-to-noise ratio of the signal sent by the network equipment.

In the third mode, the communication device selects a second modulation mode set from the modulation modes supported by the terminal device based on the signal-to-noise ratio of the signal sent by the network device, and then selects the first modulation mode set from the second modulation mode set based on the second CQI.

It can be understood that, the communication device selects the second modulation mode set from the multiple modulation modes supported by the terminal device based on the signal-to-noise ratio of the signal sent by the network device, and the communication device selects the first modulation mode set from the multiple modulation modes supported by the terminal device based on the signal-to-noise ratio of the signal sent by the network device in the same mode one, which is not described herein again, and the difference between them is that: in the third method, the selected modulation scheme set is referred to as a second modulation scheme set, and the modulation scheme set selected in the first method is referred to as a first modulation scheme set.

It can be understood that, in the second mode, the communication device selects the first modulation scheme set from the modulation schemes included in the second modulation scheme set based on the second CQI, and in the same mode, selects the first modulation scheme set from the multiple modulation schemes supported by the terminal device based on the second CQI, which is not described herein again.

In the fourth mode, the communication device selects the second modulation mode set from the modulation modes supported by the terminal device based on the second CQI, and then selects the first modulation mode set from the second modulation mode set based on the signal-to-noise ratio of the signal sent by the network device.

It can be understood that, the selection method for the second CQI of the communication device to select the second modulation scheme set from the modulation schemes supported by the terminal device, and the selection method for the communication device to select the first modulation scheme set from the modulation schemes supported by the terminal device based on the second CQI in the same scheme two are not described here again, and the difference between them is that: in the fourth scheme, the selected modulation scheme set is referred to as a second modulation scheme set, and the modulation scheme set selected in the second scheme is referred to as a first modulation scheme set.

It can be understood that, in the same manner as the first manner, the communication device selects the first modulation scheme set from the modulation schemes included in the second modulation scheme set based on the signal-to-noise ratio of the signal sent by the network device, and selects the first modulation scheme set from the modulation schemes supported by the terminal device based on the signal-to-noise ratio SINR indicated by the CSI, which is not described herein again.

In some embodiments, as shown in fig. 7, the selecting a target modulation scheme from the first modulation scheme set in S602 includes:

s6021, the communication equipment calculates mutual information of a first modulation mode in the first modulation mode set and mutual information of a second modulation mode in the first modulation mode set;

s6022, the communication device determines the second modulation scheme as the target modulation scheme based on the determination that the mutual information of the second modulation scheme is greater than the mutual information of the first modulation scheme.

The second modulation scheme is any one of the first modulation scheme set, and the first modulation scheme is any one of the first modulation scheme set except for the second modulation scheme set. For the second modulation mode, when the mutual information of the second modulation mode is greater than the mutual information of other modulation modes in the first modulation mode set, the second modulation mode is the target modulation mode.

The communication device may traverse all modulation modes in the first modulation mode set, determine the MI corresponding to each modulation mode according to the value of the equivalent signal-to-noise ratio or the value of the capacity, select the maximum MI value from the values of the MI corresponding to all modulation modes as the final MI value, and determine the modulation mode corresponding to the final MI value as the target modulation mode.

In the examples of the present application, the final MI value

Can be expressed as equation (6):

wherein the content of the first and second substances,

the MI corresponding to the mth modulation scheme in the first modulation scheme set in the ith transmission layer is shown, and in practical application, when a channel includes a plurality of transmission layers, the first CQIs corresponding to the transmission layers are independently calculated, that is, the MI corresponding to each ith transmission layer is independently calculated. In case that the channel comprises 1 transport layer, the value of l is only 1, or l is ignored.

In the wireless communication method provided in the embodiment of the present application, when mapping the value of MI, the communication device only traverses each modulation scheme in the first modulation scheme set, and for modulation schemes other than the first modulation scheme set among the modulation schemes supported by the terminal device, the value of MI of the modulation scheme does not need to be determined, so that the number of modulation schemes that need to be traversed is reduced, and the final value of MI is selected from a smaller selection range than the range shown in fig. 5 for determining the final value of MI, so that the calculation efficiency of CQI is improved, and the calculation complexity of CQI is reduced.

In some embodiments, the step of calculating MI corresponding to each first modulation scheme in the first modulation scheme set by S6021 includes: for each first modulation scheme in the first modulation scheme set, performing the following: acquiring mutual information of various value points in the first modulation mode; and superposing the mutual information of the various value points to obtain the mutual information corresponding to the first modulation mode.

For a first modulation scheme, the calculation of the MI value corresponding to the first modulation scheme can be implemented by equation (5):

in the embodiment of the present application, the MI of the sample points can be understood as the MI of the sample points and the transmission layer l on the transmission layer l.

In some embodiments, obtaining mutual information of the various value points in the first modulation mode includes: for the various value points, the following processing is performed:

acquiring the equivalent signal-to-noise ratio or capacity of the sample value points; and mapping the equivalent signal-to-noise ratio or the capacity to mutual information of the sampling value points in the first modulation mode.

Here, the equivalent snr of the sample point can be mapped to MI of the sample point in the first modulation scheme by equation (3):

here, the capacity of the sample point may be mapped to MI of the sample point in the first modulation scheme by equation (4):

in the embodiment of the present application, the communication device may determine the equivalent channel state information H according to the equivalent channel state information H_eq,iAnd calculating the value or capacity of the equivalent signal-to-noise ratio corresponding to MMSE detection or SD detection.

In some embodiments, the S603 generates a first channel quality indicator based on the mutual information corresponding to the target modulation scheme, including: and determining the channel quality indication corresponding to the value of the mutual information of the target modulation mode as the first channel quality indication in the mapping from the mutual information to the channel quality indication.

In some embodiments, the communication device further performs the following: updating the reference channel information with the first channel quality indication.

After obtaining the first CQI, the communication device may update the second CQI in the reference channel information based on the first CQI to calculate a next first CQI based on the current first CQI.

In some embodiments, the communication device further performs the steps of: transmitting the first channel quality indication to a network device, so that the network device schedules spectrum resources based on the first channel quality indication.

At this time, the communication device is a terminal device, the first CQI belongs to a downlink CQI, the terminal device reports the first CQI to the network device after obtaining the first CQI, and the network device schedules the frequency domain resource for the terminal device according to a value of the first CQI reported by the terminal device.

In some embodiments, the communication device further performs the steps of: scheduling spectrum resources based on the first channel quality indication.

At this time, the first CQI belongs to an uplink CQI, the communication device is a network device, and the network device schedules frequency domain resources for the terminal device based on the calculated value of the first CQI.

In practical application, the network device may further select a modulation and coding scheme for the terminal device based on the value of the first CQI.

Taking communication equipment as network equipment as an example, the network equipment performs SRS measurement to obtain an equivalent signal-to-noise ratio, calculates the value of uplink CQI based on the equivalent signal-to-noise ratio, and selects frequency domain resources for terminal equipment based on the calculated value of the uplink CQI.

The wireless communication method provided by the embodiment of the application can be applied to a scenario in which the base station calculates the value of the uplink CQI, and can also be applied to a scenario in which the terminal device calculates the value of the downlink CQI.

The following further describes a wireless communication method provided in an embodiment of the present application.

In the wireless communication method provided in the embodiment of the present application, not all modulation schemes are mapped, but a candidate modulation scheme set, that is, a candidate modulation scheme set, is selected according to prior information of a channel, for example, when the signal-to-noise ratio is high, mapping is performed for a high-order modulation scheme, and when the signal-to-noise ratio is low, mapping is performed for a low-order modulation scheme, or reduction of the number of modulation schemes in some appropriate candidate modulation scheme sets is performed according to CQI information historically reported by the UE, so that implementation complexity is reduced.

The wireless communication method provided by the embodiment of the application, as shown in fig. 8,

s801 selects a first modulation scheme set from a plurality of candidate modulation scheme sets.

The plurality of candidate modulation mode sets are divided by the modulation modes supported by the terminal equipment.

S802, calculating the value of the equivalent signal-to-noise ratio or the value of the capacity according to the equivalent channel state information.

And S803, traversing the modulation modes in the first modulation mode set, and determining MI values corresponding to the modulation modes in the first modulation mode set according to the value of the equivalent signal-to-noise ratio or the value of the capacity.

S804, the maximum MI value is selected as the final MI value from the MI values corresponding to the modulation schemes in the first modulation scheme set.

S805, obtaining the corresponding CQI value according to the MI value and the MI-to-CQI table.

The wireless communication method shown in fig. 8 may be implemented in a terminal device or a base station.

The wireless communication method shown in fig. 8 increases S801 to select the first modulation scheme set before the wireless communication method shown in fig. 3 calculates the CQI value. In S801, a selection process of a candidate modulation scheme may be performed according to the channel state information or the CQI information reported historically. Before determining the MI values corresponding to all the random manners according to the equivalent snr value and the capacity value, for S302 and S303, in the wireless communication method shown in fig. 8, it is only necessary to traverse the modulation manners in the candidate modulation manner set, and it is not necessary to traverse all the modulation manners. Thus reducing the complexity of CQI calculation.

The wireless communication method provided by the embodiment of the present application can be implemented and is not limited to the following embodiments:

embodiment one, select candidate modulation mode set of modulation modes according to channel state information

The modulation schemes are divided into two sets of sets. Taking the UE supporting 256QAM modulation as an example, the candidate modulation modes are divided into two sets, namely a low modulation mode set { QPSK,16QAM and 64QAM } and a high modulation mode set { 1694AM, 64QAM and 256QAM }.

As shown in fig. 9, the step of selecting the candidate modulation scheme set by the terminal device includes:

and S901, the terminal equipment calculates the equivalent SINR value corresponding to the current channel state information.

Here, the value of the equivalent SINR corresponding to the current channel state information may be calculated by equation (7):

wherein RSRP represents the power of the signal; n is a radical of_pwrThe power of the interference plus noise is characterized.

S902, the terminal device determines a first modulation mode set based on the equivalent SINR value.

If rank =1 reported by UE, when SINR > SINR₁If not, the selected first modulation mode set is a low-order modulation mode set; if rank =2 reported by UE, when SINR > SINR₂If not, the selected first modulation mode set is the high-order modulation mode setA low-order modulation mode set is adopted; if rank =3 reported by UE, when SINR > SINR₃If not, the selected first modulation mode set is a low-order modulation mode set; if rank =4 reported by UE, when SINR > SINR₄And if not, the selected first modulation mode set is a low-order modulation mode set.

In the first embodiment, the prior information of the channel, such as the signal-to-noise ratio, is used to pre-determine the range of the current channel quality, and when the channel quality is good, the candidate modulation scheme set of the higher order modulation scheme is selected, and when the channel quality is poor, the candidate modulation scheme set of the lower order modulation scheme is selected.

Selecting a candidate modulation mode set of the modulation modes according to historical reported CQI information;

according to the CQI level table, we can obtain actual modulation mode levels, assuming that the channel variation during two reports is within 10dB, and thus the CQI values reported twice do not exceed 5 levels (this assumption can be considered to be basically satisfied during periodic reporting), for example, when the CQI value reported historically is < CQI6, a modulation mode candidate modulation mode set of a low order may be selected, when the CQI value reported historically is > CQI10, a modulation mode candidate modulation mode set of a high order is selected, and when the CQI value reported historically is between [6,10], the same modulation mode candidate modulation mode set as that reported last time is selected. The relationship between the value of CQI and the CQI level may be as shown in expression 1.

Table 1 CQI values and CQI level examples

In the second embodiment, the modulation modes possibly adopted by the current channel are judged in advance by using the characteristics of the historical CQI report value and the channel variation, and a suitable candidate modulation mode set is selected, so that the implementation complexity is reduced on the basis of not losing the performance.

In the foregoing embodiment, the wireless communication method provided in the embodiment of the present application is described by taking an example of selecting a first modulation scheme set, that is, a target modulation scheme set, from 2 candidate modulation scheme sets, and may be extended to selecting the first modulation scheme set from 3 or more candidate modulation scheme sets, where only more thresholds need to be added to implement flexibly.

The above embodiments are applied to the terminal device side, and in practical applications, the wireless communication method provided by the embodiments of the present application may also be applied to the base station.

According to the wireless communication method provided by the embodiment of the application, the value of the reported CQI is predicted by using the channel state information or the prior information of the historical reported CQI, all modulation modes do not need to be traversed in the implementation process, only the modulation modes in the candidate modulation mode set need to be traversed, and meanwhile, some prior information of the channel is used, so that the implementation complexity can be effectively reduced on the basis of not losing the performance. For example, for a UE supporting 256QAM modulation, 4 traversals are required in the prior art, and when the technical solution is adopted, only 3 traversals are required, which reduces the complexity by 25%.

A wireless communication apparatus according to an embodiment of the present application is applied to a communication device, and as shown in fig. 10, the apparatus 1000 includes:

a first selection module 1001 configured to select a first modulation scheme set from a plurality of modulation schemes supported by a terminal device according to reference channel information;

a second selecting module 1002 configured to select a target modulation scheme from the first modulation scheme set;

a generating module 1003 configured to generate a first channel quality indication based on the mutual information corresponding to the target modulation scheme.

In some embodiments, the first selection module 1001 is further configured to:

and selecting a first modulation mode set from the plurality of modulation modes according to the signal-to-noise ratio of the signal sent by the network equipment.

In some embodiments, the first selection module 1001 is further configured to:

and selecting the first modulation mode set from the plurality of modulation modes according to the relation between the SINR value and at least one target signal-to-noise ratio threshold value.

In some embodiments, the at least one target snr threshold value is associated with a first number, where the first number is a number of transmission layers indicated by the csi.

In some embodiments, the first selection module 1001 is further configured to:

and selecting the first modulation mode set from the plurality of modulation modes according to a second channel quality indication.

In some embodiments, the second selection module 1002 is further configured to:

calculating mutual information of a first modulation mode in the first modulation mode set and mutual information of a second modulation mode in the first modulation mode set;

and determining the second modulation mode as the target modulation mode based on the determination that the mutual information of the second modulation mode is greater than the mutual information of the first modulation mode.

In some embodiments, the second selection module 1002 is further configured to:

for each first modulation scheme in the first modulation scheme set, performing the following:

acquiring mutual information of various value points in the first modulation mode;

and superposing the mutual information of the various value points to obtain the mutual information corresponding to the first modulation mode.

In some embodiments, the second selection module 1002 is further configured to:

aiming at each sample value point, obtaining the equivalent signal-to-noise ratio or capacity of the sample value point;

and mapping the signal-to-noise ratio or the capacity to mutual information of the sample value points in the first modulation mode aiming at various sample value points.

In some embodiments, the generation module 1003 is further configured to:

and determining the channel quality indication corresponding to the mutual information value of the target modulation mode in the mapping from the mutual information to the channel quality indication as the first channel quality indication.

In some embodiments, the apparatus 1000 further comprises: an update module configured to:

updating the reference channel information with the first channel quality indication.

In some embodiments, the first selection module 1001 is further configured to:

selecting a second modulation mode set from the plurality of modulation modes according to the signal-to-noise ratio of the signal sent by the network equipment;

and selecting the first modulation mode set from the modulation modes included in the second modulation mode set according to the second channel quality indication.

In some embodiments, the first selection module 1001 is further configured to:

selecting a second modulation mode set from the plurality of modulation modes according to a second channel quality indication;

and selecting the first modulation mode set from the modulation modes included in the second modulation mode set according to the signal-to-noise ratio of the signal sent by the network equipment.

In some embodiments, the apparatus 1000 further comprises: a transmitting module configured to transmit the first channel quality indication to a network device, so that the network device schedules spectrum resources based on the first channel quality indication.

In some embodiments, the apparatus 1000 further comprises: a scheduling module configured to schedule spectrum resources based on the first channel quality indication.

It should be understood by those skilled in the art that the foregoing description of the wireless communication apparatus according to the embodiments of the present application may be understood by referring to the description of the wireless communication method according to the embodiments of the present application.

Fig. 11 is a schematic structural diagram of a communication device 1100 according to an embodiment of the present application. The communication device may be a terminal device or a network device. The communication device 1100 shown in fig. 11 comprises a processor 1110, the processor 1110 being configured to:

selecting a target modulation mode from the first modulation mode set;

and generating a first channel quality indication CQI based on the mutual information corresponding to the target modulation mode.

In this embodiment, the processor 1110 may call and execute a computer program from the memory to implement the wireless communication method in this embodiment.

Optionally, as shown in fig. 11, the communication device 1100 may further include a memory 1120. From the memory 1120, the processor 1110 may call and execute a computer program to implement the wireless communication method in the embodiment of the present application.

The memory 1120 may be a separate device from the processor 1110, or may be integrated into the processor 1110.

Optionally, as shown in fig. 11, the communication device 1100 may further include a transceiver 1130, and the processor 1110 may control the transceiver 1130 to communicate with other devices, and in particular, may transmit information or data to the other devices or receive information or data transmitted by the other devices.

The transceiver 1130 may include a transmitter and a receiver, among others. The transceiver 1130 may further include one or more antennas, which may be present in number.

Optionally, the communication device 1100 may implement a corresponding process implemented by the communication device in each method of the embodiment of the present application, and for brevity, details are not described here again. Alternatively, the communication device 1100 may be a terminal device or a network device.

Fig. 12 is a schematic structural diagram of a chip of an embodiment of the present application. The chip 1200 shown in fig. 12 includes a processor 1210, and the processor 1210 can call and run a computer program from a memory to implement the method in the embodiment of the present application.

Optionally, as shown in fig. 12, the chip 1200 may further include a memory 3320. From the memory 1220, the processor 1210 may call and execute a computer program to implement the method in the embodiment of the present application.

The memory 1220 may be a separate device from the processor 1210, or may be integrated into the processor 1210.

Optionally, the chip 1200 may further include an input interface 1230. The processor 1210 may control the input interface 1230 to communicate with other devices or chips, and in particular, may obtain information or data sent by the other devices or chips.

Optionally, the chip 1200 may further include an output interface 1240. The processor 1210 may control the output interface 1240 to communicate with other devices or chips, and in particular, may output information or data to the other devices or chips.

Optionally, the chip may be applied to the communication device in the embodiment of the present application, and the chip may implement a corresponding process implemented by the communication device in each method in the embodiment of the present application, and for brevity, details are not described here again.

It should be understood that the chips mentioned in the embodiments of the present application may also be referred to as a system-on-chip, a system-on-chip or a system-on-chip.

Fig. 13 is a schematic block diagram of a communication system 1300 provided in an embodiment of the present application. As shown in fig. 13, the communication system 1300 includes a terminal device 1310 and a network device 1320.

The terminal device 1310 or the network device 1320 may be configured to implement the corresponding function implemented by the communication device in the foregoing method, which is not described herein again.

It should be understood that the processor of the embodiments of the present application may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The Processor may be a general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off the shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, 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 module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor.

It will be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can 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 SDR AM (ESDRAM), synchronous link Dynamic random access memory (Synchlink DRAM, SLDRAM), and Direct memory bus random access memory (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.

It should be understood that the above memories are exemplary but not limiting, for example, the memories in the embodiments of the present application may also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, 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 DRAM (SLDRAM), direct Ramb RAM (DR RAM), and the like. That is, the memory in the embodiments of the present application is intended to comprise, without being limited to, these and any other suitable types of memory.

The embodiment of the application also provides a computer readable storage medium for storing the computer program.

Optionally, the computer-readable storage medium may be applied to the communication device in the embodiment of the present application, and the computer program enables the computer to execute the corresponding process implemented by the communication device in each method in the embodiment of the present application, which is not described herein again for brevity.

Embodiments of the present application also provide a computer program product, including computer program instructions.

Optionally, the computer program product may be applied to the communication device in the embodiment of the present application, and the computer program instructions enable the computer to execute corresponding processes implemented by the communication device in the methods in the embodiment of the present application, which are not described herein again for brevity.

The embodiment of the application also provides a computer program.

Optionally, the computer program may be applied to the communication device in the embodiment of the present application, and when the computer program runs on a computer, the computer is enabled to execute corresponding processes implemented by the communication device in the methods in the embodiment of the present application, and for brevity, details are not described here again.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. 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 can be clearly understood by those skilled in the art that, for convenience and simplicity 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, the division of the units is only one 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 be in an electrical, mechanical or other form.

The 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 position, or may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

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 functions may be stored in a computer-readable storage medium if they are implemented in the form of software functional units and sold or used as separate products. Based on such understanding, the technical solutions of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of wireless communication, the method comprising:

selecting a target modulation mode from the first modulation mode set;

2. The method of claim 1, further comprising:

and selecting the first modulation mode set from the plurality of modulation modes according to the signal-to-noise ratio of the signal sent by the network equipment.

3. The method of claim 2, further comprising:

and selecting the first modulation mode set from the plurality of modulation modes according to the comparison between the signal-to-noise ratio of the signal and at least one target signal-to-noise ratio threshold value.

4. The method of claim 3, wherein the at least one target SNR threshold is associated with a first number, and wherein the first number is a number of transmission layers indicated by the CSI.

5. The method of claim 1, further comprising:

6. The method of claim 1, further comprising:

7. The method of claim 6, further comprising:

8. The method of claim 7, further comprising:

for the various value points, the following processing is performed:

obtaining the equivalent signal-to-noise ratio or capacity of the sampling value points;

and mapping the signal-to-noise ratio or the capacity to mutual information of the sampling value points in the first modulation mode.

9. The method of claim 1, further comprising:

and determining the channel quality indication corresponding to the value of the mutual information of the target modulation mode in the mapping from the mutual information to the channel quality indication as the first channel quality indication.

10. The method of claim 1, further comprising:

11. The method of claim 1, further comprising:

12. The method of claim 1, further comprising:

13. The method according to any one of claims 1 to 12, characterized in that the method further comprises:

sending the first channel quality indication to a network device, so that the network device schedules spectrum resources based on the first channel quality indication.

14. The method according to any one of claims 1 to 12, characterized in that the method further comprises:

scheduling spectrum resources based on the first channel quality indication.

15. A communication device comprising a processor, wherein the processor is configured to:

selecting a target modulation mode from the first modulation mode set;

16. A communication device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the steps of the wireless communication method according to any one of claims 1 to 14 when executing the computer program.

17. A storage medium storing an executable program, wherein the executable program, when executed by a processor, implements the wireless communication method of any one of claims 1 to 14.

18. A chip, comprising: processor for invoking and running a computer program from a memory, causing a device on which said chip is installed to perform a wireless communication method according to any one of claims 1 to 14.