CN113992314A

CN113992314A - Link self-adaptive adjusting method, device, system and storage medium

Info

Publication number: CN113992314A
Application number: CN202111242800.0A
Authority: CN
Inventors: 陈林; 杨波; 丁宝国; 刘重军
Original assignee: Comba Network Systems Co Ltd
Current assignee: Comba Network Systems Co Ltd
Priority date: 2021-10-25
Filing date: 2021-10-25
Publication date: 2022-01-28
Anticipated expiration: 2041-10-25
Also published as: CN113992314B

Abstract

The application relates to a link self-adaptive adjusting method, a device, a system and a storage medium. The link self-adaptive adjusting method comprises the following steps: receiving a configuration message transmitted by a base station; the configuration message is Channel State Information (CSI) report configuration containing a Channel Quality Indicator (CQI) report format and link parameters; the channel quality indicator CQI reporting format is sub-band reporting; the link parameters comprise a CQI bit width format and a target BLER value; the method comprises the steps of finishing sub-band CQI measurement based on configuration information and reporting a CSI measurement report to a base station; the CSI measurement report is used for indicating the base station to acquire the adaptive modulation and coding strategy MCS value of the inner ring link; acquiring MCS increment delta-MCS based on the configuration message, and reporting HARQ-ACK information to the base station; and the HARQ-ACK information is used for indicating the base station to acquire the adaptive modulation and coding strategy MCS value of the outer ring link. The present application provides configuration and application flexibility for different high reliability application scenarios.

Description

Link self-adaptive adjusting method, device, system and storage medium

Technical Field

The present application relates to the field of wireless communications technologies, and in particular, to a link adaptive adjustment method, apparatus, system, and storage medium.

Background

Wireless communication systems have been widely deployed for everyday voice, video, data, and short message services. The Mobile communication is developed through several stages of 2G (GSM, Global System for Mobile Communications), 3G (TD-SCDMA, UMTS) and 4G (LTE, Long Term Evolution), and has now entered the development and deployment stage of 5G (nr).

The 3GPP NR (New Radio) protocol supports three traffic types: eMBBs (Enhanced Mobile Broadband), URLLC (Ultra-reliable and Low Latency Communications), and eMTCs (Massive Machine Type Communications). The protocol R15 frozen in 6 months in 2018 supports eMBB service, and the protocol R16 frozen in 6 months in 2020 supports URLLC service.

The presently disclosed link adaptation method can only meet the requirements of the eMBB service, and in the implementation process, the inventor finds that at least the following problems exist in the conventional technology: the traditional link self-adaption method cannot meet the requirements of performance indexes such as reliability, time-delay and the like of URLLC service.

Disclosure of Invention

Therefore, in order to solve the above technical problems, it is necessary to provide a link adaptive adjustment method, device, system and storage medium capable of improving reliability and reducing time-delay, which can meet the requirements of application scenarios such as industrial automation on air interface end-to-end delay and reliability index, and support URLLC.

In order to achieve the above object, in one aspect, an embodiment of the present application provides a link adaptive adjustment method, where the method is applied to a terminal; the method comprises the following steps:

receiving a configuration message transmitted by a base station; the configuration message is Channel State Information (CSI) report configuration containing a Channel Quality Indicator (CQI) report format and link parameters; the channel quality indicator CQI reporting format is sub-band reporting; the link parameters comprise a CQI bit width format and a target BLER value;

the method comprises the steps of finishing sub-band CQI measurement based on configuration information and reporting a CSI measurement report to a base station; the CSI measurement report contains subband CQI measurements; the CSI measurement report is used for indicating the base station to acquire the adaptive modulation and coding strategy MCS value of the inner ring link;

acquiring MCS increment delta-MCS based on the configuration message, and reporting HARQ-ACK information to the base station; the HARQ-ACK information comprises a hybrid automatic repeat request response HARQ-ACK codebook and MCS increment delta-MCS; and the HARQ-ACK information is used for indicating the base station to acquire the adaptive modulation and coding strategy MCS value of the outer ring link.

In one embodiment, the configuration message is a radio resource control RRC message configured by the CSI report and including a CQI bit width format indicator and a plurality of target BLER values, the RRC message being obtained by the base station by using a new field configuration;

further comprising the steps of:

receiving a capability query message transmitted by a base station; the capability query message comprises a query field for presetting the sub-band CQI bit width support capability and a query field for MCS increment delta-MCS reporting capability;

feeding back capability information to the base station based on the capability query message; the capability information is used for indicating the base station to output the configuration message under the condition that the terminal is confirmed to have the preset sub-band CQI bit width supporting capability and the MCS increment delta-MCS reporting capability.

In one embodiment, the preset sub-band CQI bit width comprises a 4bits sub-band CQI bit width; the range of values for the plurality of target BLER values includes 0.0001% to 10%.

In one embodiment, the CSI measurement report further comprises wideband CQI measurement values; the sub-band CQI measured value is a sub-band differential CQI measured value;

and the CSI measurement report is used for indicating the base station to determine the sub-band used by the terminal scheduling resource according to the broadband CQI measurement value and the sub-band differential CQI measurement value, and acquiring the adaptive modulation and coding strategy MCS value of the inner ring link through table lookup on the sub-band used by the terminal scheduling resource based on the transport block size TBS, the sub-band CQI measurement value and the target BLER value.

In one embodiment, before the step of obtaining the MCS increment delta-MCS based on the configuration message and reporting the HARQ-ACK information to the base station, the method further includes the steps of:

receiving a Downlink Control Information (DCI) command transmitted by a base station through a Physical Downlink Control Channel (PDCCH); the DCI command comprises an MCS index value of a Physical Downlink Shared Channel (PDSCH);

the step of obtaining MCS increment delta-MCS based on the configuration message and reporting the HARQ-ACK information to the base station comprises the following steps:

and obtaining the MCS increment delta-MCS according to the MCS index value and the target BLER value.

In one embodiment, in the step of obtaining the MCS increment delta-MCS according to the MCS index value and the target BLER value, the MCS increment delta-MCS is obtained according to the following formula:

delta-MCS＝I_{MCS_tgt}-I_MCS

wherein, I_{MCS_tgt}Maximum MCS index estimated to reach the target BLER value; i is_MCSIs the MCS index value.

A link self-adaptive adjusting method is applied to a base station; the method comprises the following steps:

transmitting a configuration message to the terminal; the configuration message is Channel State Information (CSI) report configuration containing a Channel Quality Indicator (CQI) report format and link parameters; the channel quality indicator CQI reporting format is sub-band reporting; the link parameters comprise a CQI bit width format and a target BLER value; the configuration message is used for indicating the terminal to complete sub-band CQI measurement so as to report a CSI measurement report and acquiring MCS increment delta-MCS to report HARQ-ACK information;

receiving a CSI measurement report reported by a terminal, and acquiring an inner loop link adaptive modulation and coding strategy MCS value according to the CSI measurement report; the CSI measurement report contains subband CQI measurements;

receiving HARQ-ACK information reported by a terminal, and acquiring an outer loop link adaptive modulation and coding strategy MCS value according to the HARQ-ACK information; the HARQ-ACK information includes a hybrid automatic repeat request acknowledgement HARQ-ACK codebook and an MCS delta-MCS.

In one embodiment, before the step of transmitting the configuration message to the terminal, the method further includes the steps of:

transmitting a transmission capability query message to a terminal; the capability query message comprises a query field for presetting the sub-band CQI bit width support capability and a query field for MCS increment delta-MCS reporting capability;

under the condition of receiving capability information fed back by the terminal based on the capability query message, if the terminal is confirmed to have preset sub-band CQI bit width supporting capability and MCS increment delta-MCS reporting capability based on the capability information, generating and outputting a configuration message; the configuration message is a radio resource control RRC message which is obtained by adopting a newly added field to configure CSI report configuration and contains a CQI bit width format indicator and a plurality of target BLER values.

the step of obtaining the inner loop link adaptive modulation and coding strategy MCS value according to the CSI measurement report comprises the following steps:

determining a sub-band used by the terminal scheduling resource according to the broadband CQI measured value and the sub-band differential CQI measured value;

and on the subband used by the terminal scheduling resource, acquiring the adaptive modulation and coding strategy MCS value of the inner-loop link through table look-up based on the transport block size TBS, the subband CQI measurement value and the target BLER value.

In one embodiment, the step of obtaining the inner-loop link adaptive modulation and coding scheme MCS value by table lookup based on the transport block size TBS, the sub-band CQI measurement value and the target BLER value comprises:

according to the size TBS of the transmission block, inquiring and selecting a modulation and coding strategy MCS value of the inner loop link self-adaption in a link simulation curve; and the link simulation curve comprises a BLER-SINR-MCS curve which is obtained by simulation and corresponds to the size TBS of the transmission block in each span interval in the URLLC scene.

In one embodiment, in the step of obtaining the adaptive modulation and coding strategy MCS value of the outer link according to the HARQ-ACK information, the adaptive modulation and coding strategy MCS value of the outer link is obtained by using the following formula:

MCS(i)＝MCS(i-1)+delta-MCS；

wherein i represents a time slot; the delta-MCS is MCS increment delta-MCS; MCS (i-1) is a modulation and coding strategy MCS value of the outer loop link self-adaption at the last time; and MCS (i) is the MCS value of the current outer loop link self-adaptive modulation and coding strategy.

A link adaptive adjustment device is applied to a terminal; the device comprises:

the message receiving module is used for receiving the configuration message transmitted by the base station; the configuration message is Channel State Information (CSI) report configuration containing a Channel Quality Indicator (CQI) report format and link parameters; the channel quality indicator CQI reporting format is sub-band reporting; the link parameters comprise a CQI bit width format and a target BLER value;

the reporting module is used for finishing sub-band CQI measurement based on the configuration message and reporting a CSI measurement report to the base station; the CSI measurement report contains subband CQI measurements; the CSI measurement report is used for indicating the base station to acquire the adaptive modulation and coding strategy MCS value of the inner ring link; and is used for obtaining MCS increment delta-MCS based on the configuration message, and reporting HARQ-ACK information to the base station; the HARQ-ACK information comprises a hybrid automatic repeat request response HARQ-ACK codebook and MCS increment delta-MCS; and the HARQ-ACK information is used for indicating the base station to acquire the adaptive modulation and coding strategy MCS value of the outer ring link.

A link adaptive adjustment device is applied to a base station; the device comprises:

the message output module is used for transmitting the configuration message to the terminal; the configuration message is Channel State Information (CSI) report configuration containing a Channel Quality Indicator (CQI) report format and link parameters; the channel quality indicator CQI reporting format is sub-band reporting; the link parameters comprise a CQI bit width format and a target BLER value; the configuration message is used for indicating the terminal to complete sub-band CQI measurement so as to report a CSI measurement report and acquiring MCS increment delta-MCS to report HARQ-ACK information;

the MCS value acquisition module is used for receiving a CSI measurement report reported by the terminal and acquiring an inner-loop link adaptive modulation and coding strategy MCS value according to the CSI measurement report; the CSI measurement report contains subband CQI measurements; receiving HARQ-ACK information reported by a terminal, and acquiring an outer loop link adaptive modulation and coding strategy MCS value according to the HARQ-ACK information; the HARQ-ACK information includes a hybrid automatic repeat request acknowledgement HARQ-ACK codebook and an MCS delta-MCS.

A link self-adaptive adjustment system comprises a base station and a terminal connected with the base station; wherein:

the terminal is used for executing the link self-adaptive adjusting method implemented from the terminal perspective;

the base station is configured to perform the steps of the link adaptive adjustment method implemented from the perspective of the base station.

A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the above-mentioned method.

One of the above technical solutions has the following advantages and beneficial effects:

in the application, a terminal reports a measurement report and HARQ-ACK information according to a configuration message transmitted by a base station; the configuration message comprises a Channel Quality Indicator (CQI) reporting format and link parameters, and the link parameters comprise a CQI bit width format and a target BLER value; the bit width of the sub-band CQI reported by the terminal configured by the base station can improve the reporting precision of the sub-band CQI, and a prerequisite condition is provided for the base station to accurately select the MCS of the scheduling service so as to improve the transmission reliability of the service. Furthermore, in the method and the device, the base station configures different target BLER values for the terminal, and accurately selects the MCS for the terminal, so that a plurality of values can be configured, and configuration and application flexibility is provided for different high-reliability application scenes. The method and the device have the advantages that the terminal calculates the MCS adjustment amount, feeds the MCS adjustment amount and the HARQ-ACK codebook back together, can greatly accelerate the response speed of the UE side, fully utilizes the feedback accuracy of the UE side, and provides a precondition for the base station side to accurately decide the target MCS.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a diagram of an exemplary implementation of a link adaptation method;

fig. 2 is a schematic flowchart of a link adaptive adjustment method implemented from a terminal perspective in one embodiment;

FIG. 3 is a flow diagram illustrating a subband-based inner loop link adaptation method in one embodiment;

FIG. 4 is a flow chart of an outer loop link adaptation method based on delta-MCS in an embodiment;

fig. 5 is a flowchart illustrating a link adaptive adjustment method implemented from the perspective of a base station in one embodiment;

FIG. 6 is a block diagram of a link adaptive adjustment apparatus implemented from a terminal perspective in one embodiment;

FIG. 7 is a block diagram of a link adaptive adjustment apparatus implemented from the perspective of a base station in one embodiment;

FIG. 8 is a flow diagram of inner loop link adaptation base station and UE signaling interaction based on sub-band CQI in one embodiment;

FIG. 9 is a flow chart of outer loop link adaptation base station and UE signaling interaction based on delta-MCS in one embodiment.

Detailed Description

To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another.

Spatial relational terms, such as "under," "below," "under," "over," and the like may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements or features described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary terms "under" and "under" can encompass both an orientation of above and below. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations) and the spatial descriptors used herein interpreted accordingly.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be connected to the other element through intervening elements. Further, "connection" in the following embodiments is understood to mean "electrical connection", "communication connection", or the like, if there is a transfer of electrical signals or data between the connected objects.

As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. Also, as used in this specification, the term "and/or" includes any and all combinations of the associated listed items.

At present, commercial base station products of most manufacturers only support the eMBB service, and the eMBB service cannot meet the requirements of industrial automation scenes in the aspects of performance indexes such as reliability, time delay and the like. In the application field of vertical industry, such as the application scenes of industrial automation and the like, the end-to-end time delay of an air interface is less than 1 millisecond, and the reliability index reaches more than 99.999 percent. Due to the fast fading characteristic caused by the multipath effect of the wireless channel, the quality of the wireless channel changes very fast, and the adjustment step length of the existing link adaptation method is difficult to adapt to the fast changing characteristic of the wireless channel, which brings great influence on the achievement of the high reliability and low time delay performance index of the URLLC.

The presently disclosed link self-adaption method can only meet the requirements of eMBB services, and the reliability index only needs to meet more than 10%; the existing link self-adaptive method can not meet the reliability requirement (more than 0.001%) of the URLLC service. The fast fading characteristic caused by the multipath effect of the wireless channel results in very fast change of the quality of the wireless channel, and the adjustment step length of the existing link adaptation method is difficult to adapt to the fast changing characteristic of the wireless channel, which brings great adverse effect on the achievement of high reliability and low time delay performance index of URLLC.

In order to improve the accuracy and timeliness of URLLC link adaptation in the R17 protocol, research on various solutions is carried out. In an industrial automation application scene, aiming at different reliability index requirements, the method provides a perfect link self-adaption method so that the service meets different reliability index requirements, and the system design of the URLLC base station is optimized.

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

The link adaptive adjustment method provided by the application can be applied to the application environment shown in fig. 1. Where a terminal (UE)102 communicates with a base station 104, the present application applies to the downlink, which may be for the mobile side, and base station to mobile is referred to as the downlink.

It should be noted that the terminal UE referred to in the present application is not limited to the 5G network, and includes: the system comprises a mobile phone, an Internet of things device, an intelligent household device, an industrial control device, a vehicle device and the like. The User equipment may also be referred to as a Terminal (Terminal), a Terminal Device (Terminal Device), a Mobile Station (Mobile Station), a Mobile Station (Mobile), a Remote Station (Remote Station), a Remote Terminal (Remote Terminal), an Access Terminal (Access Terminal), a User Terminal (User Terminal), and a User Agent (User Agent), which are not limited herein. The user device may be an automobile in Vehicle-To-Vehicle (V2V) communication, a machine in machine-type communication, or the like.

In addition, the base station referred to in the present application may be a Base Station (BS) device deployed in a radio access network to provide a wireless communication function for a UE, and includes various forms of macro base stations, micro base stations, relay stations, controllers, access points, and the like. In systems using different radio access technologies, names of devices having a base station function may be different, for example, in an LTE network, the device is called an evolved node B (eNB), in a third generation 3G network, the device is called a node B (node B), or the device is applied to a communication node, an NR base station, a gNB, and the like in a fifth generation communication system, and may also be other similar network devices.

The link adaptive adjustment method provided by the application can be applied to an LTE system, an LTE-Advanced (LTE-A) system or other wireless communication systems adopting various wireless access technologies, such as systems adopting access technologies of code division multiple access, frequency division multiple access, time division multiple access, orthogonal frequency division multiple access, Carrier Aggregation (CA) and the like. Furthermore, it may also be applicable to use of a subsequent evolution system, such as a fifth generation 5G system, etc. Specifically, the method and the device are suitable for a wireless communication system, and are particularly suitable for URLLC application scenarios.

In an embodiment, as shown in fig. 2, a link adaptive adjustment method is provided, which is described by taking the method as an example applied to the terminal 102 in fig. 1, and includes the following steps:

step 202, receiving a configuration message transmitted by a base station;

the configuration message is Channel State Information (CSI) report configuration containing a Channel Quality Indicator (CQI) report format and link parameters; the channel quality indicator CQI reporting format is sub-band reporting; the link parameters include the CQI bit width format and the target BLER value.

Specifically, based on the downlink, the terminal receives a configuration message transmitted by the base station, and the configuration message may be a channel State information CSI (channel State information) report configuration (CSI-reportconfiguration) including a channel Quality indicator cqi (channel Quality indicator) reporting format and a link parameter. Further, the base station configures a channel quality indicator CQI reporting format for sub-band reporting; the link parameters may include a CQI bit width format and a target BLER (Block Error rate) value, that is, the CQI bit width format and the target BLER value (target-BLER) of the terminal are configured by the base station in the present application. In some embodiments, the target BLER values may be multiple, the CQI bit width format may be a 4-bits sub-band CQI bit width, and the multiple target BLER values may range from 0.0001% to 10%.

The base station in the application can improve the reporting precision (higher precision and larger information quantity) of the sub-band CQI by configuring the sub-band CQI bit width reported by the UE, and provides a prerequisite for the base station to accurately select the Modulation and Coding Scheme (MCS) of the scheduling service, thereby improving the transmission reliability of the service. In addition, by configuring different target BLER values for the UE, the base station side accurately selects MCS for the UE in combination with Transport Block Size TBS (Transport Block Size); the method provides a foundation for accurately selecting the MCS for the small packet service (such as 0-256 bits) in the URLLC application scene, and provides configuration and application flexibility for different high-reliability application scenes (such as 0.1%, 0.01%, 0.001%, 0.0001% and the like).

It should be noted that the value ranges of multiple target BLER values may be set according to service requirements, so as to meet the reliability requirement.

In one embodiment, the configuration message may configure a radio resource control RRC message containing a CQI bit width format indicator and a plurality of target BLER values, which is obtained by a base station using a newly added field configuration, for a CSI report;

the method can also comprise the following steps:

Specifically, the base station may configure a CQI reporting form of the UE as subband reporting through a CSI-reporting-configuration- > reportFreqConfiguration- > CQI-format indicator cell in a Radio Resource Control (RRC) message. In some embodiments, the RRC message may be an RRC connection reconfiguration message rrcreeconfiguration sent by the base station to the UE.

Further, in the present application, the terminal feeds back the capability information to the base station when receiving the capability query message transmitted by the base station. The capability query message comprises a query field for presetting subband CQI bit width support capability and a query field for MCS increment delta-MCS reporting capability, and the capability information can be used for indicating the base station to output the configuration message under the condition that the terminal is confirmed to have the preset subband CQI bit width support capability and the MCS increment delta-MCS reporting capability. In some embodiments, the preset sub-band CQI bit width may comprise a 4bits sub-band CQI bit width. In other embodiments, the preset sub-band CQI bit width may include a 2-bit sub-band CQI bit width and a 4-bit sub-band CQI bit width.

In some embodiments, the base station determines whether the UE supports the 4-bits sub-band CQI according to the bit width supported by the acquired sub-band CQI, that is, in the present application, the base station may configure a sub-band CQI bit width format sub and cq-format indicator (sub-band bit-format indicator) for the terminal according to whether the UE supports the 4-bits sub-band CQI according to the UE capability, where the value of the sub-band CQI bit width format sub and cq-format indicator may be equal to estimated { n2, n4 }. Further, the base station may configure the target BLER value for the terminal through the CSI-ReportConfig in the RRC message, and the specific format may be as follows: target-Bler ENUMERATED { value1, value2, value3, … }; wherein, value1 is 10%, value2 is 0.1%, value3 is 0.01%, value4 is 0.001%, value5 is 0.0001%, etc.; the sub and cqiibits-format indicator and the target-Bler are newly added fields.

It should be noted that, taking the bit width of the 4-bits sub-band CQI as an example, the capability query message in the present application may refer to that the base station sends a UE capability query message UECapabilityEnquiry to the UE, and a field whether the 4-bits sub-band CQI is supported is newly added under a UE capability query message Phy-parametercommon cell, and the specific format may be: sub-CQI-4 bits estimated { supported } OptiONAL; the capability information may refer to UE reporting UE capability information UECapabilityInformation to the base station; furthermore, the base station can obtain the sub-band CQI bit width supported by the UE according to the sub-band-CQI-4 bits in the UE capability information; therefore, the base station can judge whether the UE supports the 4-bit sub-band CQI according to the bit width supported by the acquired sub-band CQI.

In some embodiments, the base station determines whether the UE supports the delta-MCS reporting function according to the obtained delta-MCS-Report field. Furthermore, the base station may configure the target BLER value for the terminal through the CSI-ReportConfig in the RRC message, and the specific format may be as follows: target-Bler ENUMERATED { value1, value2, value3, … }; wherein, value1 is 10%, value2 is 0.1%, value3 is 0.01%, value4 is 0.001%, value5 is 0.0001%, etc.; wherein, target-Bler is a newly added field.

It should be noted that the capability query message in the present application may refer to a UE capability query message uecapabilitylenqiry, and whether the incremental MCS reporting field is supported is newly added in a UE capability query message Phy-ParametersCommon cell, where the specific format is as follows: delta-MCS-Report estimated { supported } OPTIONAL; the UE reports UE capability information UECapabilityinformation to a base station; the base station acquires whether the UE supports the delta-MCS-Report function or not according to the field delta-MCS-Report in the UE capability information; and the base station judges whether the UE supports the delta-MCS reporting function or not according to the obtained delta-MCS-Report field.

In the application, the fields of sub-band-CQI-4 bits and delta-MCS-Report are newly added under the UE capability information Phy-ParameterCommon cell; compared with the current URLLC standard, only one level of reliability index can be configured through cqi-Table fields, and multiple values can be configured through target-Bler, so that possibility is provided for different reliability level application scenarios of URLLC.

Step 204, completing subband CQI measurement based on the configuration message, and reporting a CSI measurement report to the base station; the CSI measurement report contains subband CQI measurements; and the CSI measurement report is used for indicating the base station to acquire the adaptive modulation and coding strategy MCS value of the inner loop link.

Specifically, the terminal receives the configuration message transmitted by the base station, and then completes the measurement of the sub-band CQI. For example, after receiving the CQI report format configured by the base station through the RRC message, the terminal reports the CQI measurement value of each sub-band through CQI measurement, which may include adding a 4-bit sub-band differential CQI table.

Specifically, the CSI measurement report may carry a wideband CQI measurement value and a 4bits subband differential CQI measurement value;

in the application, the base station configures the reporting period and offset of the periodic CSI report for the UE through an RRC message, and the CQI report format may be a subbandCQI, a subband size and a subband format, a bit width format (n2, n4) of the CQI, and a target BLER value. And after receiving the configuration information of the CSI measurement report configured by the base station, the terminal UE completes the sub-band CQI measurement and reports the broadband CQI measurement value and the 4-bit sub-band differential CQI measurement value.

The 4bits sub-band differential CQI measurement value can be as shown in table 1:

table 1: 4bits sub-band differential CQI table

After the base station obtains a CSI measurement report (e.g., a sub-band CQI report) reported by the terminal, as shown in fig. 3, the adaptive MCS value of the inner-loop link may be obtained through a sub-band CQI, a target-BLER (target BLER value) and a transport block size TBS table. Further, the base station selects a sub-band used by the UE scheduling resource based on the broadband CQI value and the sub-band differential CQI value reported by the terminal UE; on the subband resources selected for the UE, the base station selects a target MCS (e.g., obtained by table lookup) according to the simulation result of the link platform based on the subband CQI value, the target BLER, and the transport block size of the service.

Further, the present application proposes that the transmission block can be divided into a plurality of bins (i.e. a plurality of span intervals) according to the size of the transmission block, such as: 0-256, 257-1000 and 1001-1000 are respectively a first gear, and the target MCS is obtained by off-line calculation or table look-up. Furthermore, the method and the device can adapt to the scene that the size span of a transmission block of the URLLC service is large, a small data packet is only dozens of bits, and a large data packet reaches thousands of bits. It should be noted that, with respect to the process of selecting the target MCS by the base station based on the sub-band CQI value, the target BLER, and the size of the transport block of the service, reference may be made to the following description of the link adaptive adjustment method implemented from the perspective of the base station, which is not described herein again.

In the application, when the MCS value is determined, the TBS is considered, so that the influence of the TBS on a link curve of a wireless channel BLER-SINR (Signal to Interference plus Noise Ratio) can be effectively eliminated, and a basis is provided for accurately selecting the adaptive target MCS value of the inner-loop link for URLLC packet service (such as 0-256 bits).

Step 206, acquiring MCS increment delta-MCS based on the configuration message, and reporting HARQ-ACK information to the base station;

wherein, the HARQ-ACK information comprises a hybrid automatic repeat request response HARQ-ACK codebook and MCS increment delta-MCS; and the HARQ-ACK information is used for indicating the base station to acquire the adaptive modulation and coding strategy MCS value of the outer ring link.

Specifically, according to the delta-MCS reporting mechanism based on HARQ (Hybrid Automatic Repeat reQuest) -ACK (acknowledgement), the UE side accurately predicts the delta-MCS, and the delta-MCS value and the HARQ-ACK codebook are fed back together, so that the response speed of the UE side can be greatly increased, the accuracy of feedback of the UE side is fully utilized, and a precondition is provided for the base station side to accurately decide the target MCS.

While the traditional scheme calculates the delta-MCS on the base station side (i.e. the base station side calculates the delta-MCS), the accuracy is low (10%), for example, the target BLRE can only reach 10%, and the accuracy is difficult to meet the requirement of the URLLC actual scenario. Compared with the traditional CQI through the periodic feedback of tens of milliseconds, the target BLER value in the method can reach more than 0.001%, namely the timeliness and the accuracy of the method can be greatly improved. Therefore, the effect of MCS adjustment of the outer loop link self-adaptive method can be effectively improved.

Further, the UE may configure the target BLER value based on the base station, the MCS value of the current transport block (i.e. MCS index I of the current transport block)_MCS) And calculating the delta-MCS value which needs to be adjusted at the base station side when the current service reaches the target BLER value, and feeding back the delta-MCS value and the HARQ-ACK information to the base station.

In one embodiment, before the step of obtaining the MCS increment delta-MCS based on the configuration message and reporting the HARQ-ACK information to the base station, the method may further include the steps of:

Specifically, the base station eNB receives the sub-band CQI report and the downlink data packet arrives, and the base station determines the target value of the inner-loop MCS by table look-up based on the sub-band CQI report value, the target BLER value and the transport block size TBS of the data packet. Further, the base station notifies the UE of an MCS index value used for a current Downlink PDSCH service (Physical Downlink Shared Channel) through a DCI command of a PDCCH (Physical Downlink Control Channel) based on the MCS value obtained by the inner-loop link adaptation method. And then, the UE decodes after receiving the PDSCH, determines a delta-MCS value which should be used by the base station by combining the target BLER value, and feeds back the delta-MCS and the HARQ-ACK codebook to the base station side together. And after receiving the delta-MCS fed back by the UE, the base station calculates a target MCS value by an outer loop link self-adaptive method.

delta-MCS＝I_{MCS_tgt}-I_MCS

Specifically, after receiving the target BLER, the terminal UE bases on the MCS index I of the current transport block_MCSAnd calculating delta-MCS by target-Bler; after the terminal calculates the delta-MCS, feeding back the bit information of the delta-MCS and the HARQ-ACK codebook of the current transmission block to the base station together; when a terminal decodes a PDSCH traffic channel and selects the decoding iteration number of a certain LDPC (Low Density Parity Check Code), the value of delta-MCS is determined according To the relation between the Ratio of Parity Check failure To the total number of Parity checks and the SNR (Signal-To-Noise Ratio) curve. The delta-MCS information and the HARQ-ACK codebook are fed back together, so that the response speed of the UE side can be greatly increased, the accuracy of feedback of the UE side is fully utilized, and a precondition is provided for the base station side to accurately decide the target MCS; and the traditional scheme delta-MCS is calculated on the base station side, and the requirement of the URLLC actual scene is difficult to meet due to low accuracy (10%).

In some embodiments, the UE may be based on RRCRECONFICATION->Field target-Bler under CSI-report configuration cell, MCS value used by current transmission block, delta-MCS value required to be satisfied if downlink service reaches target-Bler performance index(ii) a Wherein delta-MCS is I_{MCS_tgt}-I_MCS，I_{MCS_tgt}Is the maximum MCS index, I, to achieve the target BLER estimate_MCSMCS index value of a currently received TB (Transport Block) Block; in addition, when a certain number of LDPC decoding iterations is selected, the terminal determines the value of the delta-MCS according to the relationship between the ratio of parity check failures to the total number of parity checks and the SNR curve.

Further, the UE reports HARQ-ACK and delta-MCS information on the PUCCH, wherein the delta-MCS can be added with 1-2 bits after the HARQ-ACK information.

After receiving a sub-band CQI measurement report reported by UE, a base station determines an adaptive MCS value of an inner-loop link based on a sub-band CQI value, a target BLER and a transport block size TBS; and the base station determines the adaptive MCS value of the outer ring link based on the delta-MCS in the received HARQ-ACK codebook and informs the UE in the DCI information.

In the link self-adaptive adjustment method, the precision of the sub-band CQI value is further improved by introducing the sub-band CQI report of 4bits, so that the precision of the inner loop link self-adaptive method can be effectively improved; by introducing the mechanism that the terminal reports the delta-MCS, the timeliness of obtaining the target MCS is further improved, and the response time of the outer loop link self-adaptive method can be effectively prolonged. The method and the device provide a specific solution for the base station to accurately select the MCS of the scheduling service, accurately predict the delta-MCS through the UE side, have high response speed, and effectively improve the effect of adjusting the MCS by the outer loop link self-adaptive method.

In an embodiment, as shown in fig. 5, a link adaptive adjustment method is provided, which is described by taking the method as an example applied to the base station 104 in fig. 1, and includes the following steps:

step 502, transmitting a configuration message to a terminal;

the configuration message is Channel State Information (CSI) report configuration containing a Channel Quality Indicator (CQI) report format and link parameters; the channel quality indicator CQI reporting format is sub-band reporting; the link parameters comprise a CQI bit width format and a target BLER value; the configuration message is used for indicating the terminal to complete sub-band CQI measurement so as to report a CSI measurement report and acquiring MCS increment delta-MCS to report HARQ-ACK information;

specifically, the application provides a specific method for configuring the target BLER of the terminal by the base station, reporting the delta-MCS by the terminal and calculating the MCS by the base station side. The base station in the application can improve the reporting precision of the sub-band CQI by configuring the bit width of the sub-band CQI reported by the UE, and provides a prerequisite for the base station to accurately select the MCS of the scheduling service so as to improve the transmission reliability of the service.

Furthermore, in the method, the base station configures different target BLERs for the UE, and the base station side accurately selects an MCS for the UE by combining the size TBS of the transmission block; the method provides a foundation for accurately selecting the MCS for the small packet service (such as 0-256 bits) in the URLLC application scene, and provides configuration and application flexibility for different high-reliability application scenes (such as 0.1%, 0.01%, 0.001%, 0.0001% and the like).

In some embodiments, the base station configures reporting period and offset of periodic CSI report to the UE through RRC message, where the format of CQI report is subbandCQI, subband size and subband format, bit width format of CQI (n2, n4) and target-BLER value (target-BLER).

Specifically, the base station may configure a CQI reporting form of the UE as subband reporting through a CSI-reporting-reportFreqConfiguration-CQI-format indicator cell in the RRC message, and configure a subband CQI bit width format subbbandcqitifier-format indicator for the terminal under the CSI-reporting-reportFreqConfiguration cell according to whether the UE capability supports a 4-bits subband CQI, where a value of the subband CQI bit width format subbbandcqitifier-format indicator may be enum signaled { n2, n4 }.

In addition, the base station may configure the target BLER value for the terminal through the CSI-ReportConfig in the RRC message, where the specific format is as follows: target-Bler ENUMERATED { value1, value2, value3, … }; wherein, value1 is 10%, value2 is 0.1%, value3 is 0.01%, value4 is 0.001%, value5 is 0.0001%, etc.; the sub and cqiibits-format indicator and the target-Bler are newly added fields. Adding new fields of sub-band-CQI-4 bits and delta-MCS-Report under a UE capability information Phy-ParameterCommon cell; compared with the traditional URLLC standard, only one level of reliability index can be configured through cqi-Table fields, the target-Bler in the application can be configured with a plurality of values, and possibility is provided for application scenes of different reliability levels of URLLC.

In one embodiment, before the step of transmitting the configuration message to the terminal, the method may further include the steps of:

The preset sub-band CQI bit width can comprise a 4bits sub-band CQI bit width; the range of values for the plurality of target BLER values includes 0.0001% to 10%.

Specifically, the base station sends a UE capability query message uecapabilitylenqiry to the UE, and adds a field whether to support a 4bits sub-band CQI or not in a Phy-parameters common cell of the UE capability query message, where the specific format is as follows: sub-CQI-4 bits estimated { supported } OptiONAL; the UE reports UE capability information UECapabilityinformation to a base station; the base station acquires the sub-band CQI bit width supported by the UE according to the sub-band-CQI-4 bits in the UE capability information; and the base station judges whether the UE supports the 4bits sub-band CQI or not according to the bit width supported by the acquired sub-band CQI.

Wherein, under the condition that the UE is confirmed to support the 4bits sub-band CQI, the base station sends RRC connection reconfiguration message RRCRECONFITTION to the UE. And configuring the CSI-report configuration- > reportFreqconfiguration- > cqi-FormatIndicator cell into a subband reporting subBandCQI. Meanwhile, a field sub-bandwidth-Format-Indicator estimated { n2, n4} is newly added under a CSI-report configuration cell, and a specific value can be n4, namely, the terminal configures a 4-bits sub-band CQI bit width Format.

And under the condition that the UE is confirmed not to support the 4bits sub-band CQI, the base station sends an RRC connection reconfiguration message RRCRECONFITTION to the UE, and configures the CSI-report Configuration- > reportFreq Configuration- > CQI-FormatIndicator cell into a sub-band reporting subbandCQI; the CSI-report configuration- > re-portFreqconfiguration- > sub-and cq-indicators-format indicator is configured as n2 or is not configured by default.

For another example, the base station sends a UE capability query message uecapabilitylenqiry to the UE, and a new field whether to support incremental MCS reporting is added in the UE capability query message Phy-parameters common cell, where the specific format is as follows: delta-MCS-Report estimated { supported } OPTIONAL; the UE reports UE capability information UECapabilityinformation to a base station; the base station acquires whether the UE supports the delta-MCS-Report function or not according to the field delta-MCS-Report in the UE capability information; and the base station judges whether the UE supports the delta-MCS reporting function or not according to the obtained delta-MCS-Report field.

The base station sends RRC connection reconfiguration information RRCRECONFITTION to the UE and configures CSI-report-config- > reportFreq Configuration- > cqi-For-indicator information elements into sub-bands to report subbandCQI when the decision terminal supports the delta-MCS reporting function; the new field target-Bler is added under the CSI-report config cell, and the specific format is as follows: target-Bler ENUMERATED { value1, value2, value3, … }; wherein, value1 is 10%, value2 is 0.1%, value3 is 0.01%, value4 is 0.001%, value5 is 0.0001%, etc.;

and when the decision terminal does not support the delta-MCS reporting function, the base station sends an RRC connection reconfiguration message RRCREConfiguration to the UE, and configures CSI-report-Freqconfiguration-cqi-Formantifier information elements into sub-bands to report subbandCQIs.

Furthermore, after receiving the configuration information of the CSI measurement report configured by the base station, the UE completes the measurement of the sub-band CQI and reports the measurement value of the broadband CQI and the measurement value of the 4-bit differential sub-band CQI; and the UE calculates the delta-MCS value which needs to be adjusted on the base station side when the current service reaches the target BLER value based on the target BLER value configured by the base station and the MCS value of the current transmission block, and feeds the delta-MCS value and the HARQ-ACK information back to the base station.

It should be noted that, when the terminal side receives the configuration message and completes the corresponding measurement and calculation processes, reference may be made to the foregoing link adaptive adjustment method executed from the terminal perspective, which is not described herein again.

Step 504, receiving a CSI measurement report reported by a terminal, and acquiring an inner loop link adaptive modulation and coding strategy MCS value according to the CSI measurement report;

wherein the CSI measurement report contains subband CQI measurement values;

specifically, after receiving the CSI measurement report reported by the terminal, the base station may obtain the MCS value of the inner-loop link according to the sub-band CQI measurement value included in the CSI measurement report.

Specifically, after receiving a sub-band CQI measurement report reported by UE, a base station determines an adaptive MCS value of an inner-loop link based on a sub-band CQI value, a target BLER and a transport block size TBS; further, after the base station obtains a sub-band CQI report reported by the terminal, the adaptive MCS value of the inner ring link can be obtained by table look-up through the sub-band CQI, the target-BLER and the transport block size TBS; in the application, when the MCS value is determined, the TBS is considered, the influence of the TBS on a radio channel BLER-SINR link curve can be effectively eliminated, and a foundation is provided for accurately selecting the adaptive target MCS value of the inner loop link for URLLC packet service (such as 0-256 bits).

Specifically, the base station selects a sub-band used by the UE scheduling resource based on a broadband CQI value and a sub-band differential CQI value reported by the UE; on the subband resources selected for the UE, the base station may select a target MCS based on the subband CQI value, the target BLER, and the transport block size of the service, according to the simulation result of the link platform.

Wherein, the application layer carries out link simulation to obtain a link curve (BLER-SINR-MCS curve). According to the method and the device, the transmission blocks are classified (each span interval) according to the sizes of the transmission blocks, the small-packet transmission service can be guaranteed, and the method and the device are higher in precision and more accurate. Specifically, to improve the accuracy of MCS, the size of the transport block may be divided into several steps, such as: 0-256, 257-1000 and 1001-more are one-file, i.e. one table per file, and then off-line calculation or table lookup is performed to obtain the target MCS.

After acquiring the adaptive modulation and coding strategy MCS value of the inner loop link, the base station can schedule PDSCH resources for the UE through a PDCCH DCI Format command Format 1_1/1_2, and inform the UE MCS value in the DCI Format; and the UE feeds back the HARQ-ACK information on the PUCCH resource indicated by the DCI format.

Step 506, receiving HARQ-ACK information reported by the terminal, and acquiring an outer loop link adaptive modulation and coding strategy MCS value according to the HARQ-ACK information;

wherein, the HARQ-ACK information comprises a hybrid automatic repeat request answering HARQ-ACK codebook and MCS increment delta-MCS.

Specifically, the base station determines the adaptive MCS value of the outer loop link based on the delta-MCS in the received HARQ-ACK codebook, and notifies the UE in DCI information. According to the method, a delta-MCS reporting mechanism based on HARQ-ACK is executed from a terminal side, the delta-MCS is accurately predicted through a UE side, and the value of the delta-MCS and an HARQ-ACK codebook are fed back together, so that the response speed of the UE side can be greatly increased, the feedback accuracy of the UE side is fully utilized, and the target BLER can reach more than 0.001%; compared with the traditional CQI through the periodic feedback of tens of milliseconds, the timeliness and the accuracy can be greatly improved. Therefore, the effect of MCS adjustment of the outer loop link self-adaptive method can be effectively improved.

And then, after obtaining the delta-MCS reported by the terminal through HARQ feedback, the base station calculates the outer loop link adaptive MCS for sending the subsequent transport block.

MCS(i)＝MCS(i-1)+delta-MCS；

Specifically, after receiving the delta-MCS fed back by the UE, the base station calculates a target MCS value by using an outer loop link adaptive method, where the target MCS (i) is MCS (i-1) + delta-MCS; referring to fig. 4, MCS (i-1) is the MCS value used for transmitting PDSCH1 before PDSCH1 HARQ-ACK feedback, MCS (i) is the target MCS value used for transmitting PDSCH2 after HARQ-ACK feedback, and i indicates the slot.

In some embodiments, after obtaining the delta-MCS reported by the HARQ feedback of the terminal, the base station calculates an outer loop link adaptive MCS for transmitting a subsequent transport block, where MCS (i) is MCS (i-1) + delta-MCS; the base station calculates the Resource size of a Physical Resource Block (PRB) required for the transmission of the subsequent transport Block based on the MCS (i), and notifies the index of the MCS (i) to the terminal in the DCI signaling.

In some embodiments, the base station calculates an outer loop target MCS value based on the delta-MCS value reported by the UE, MCS (i) ═ MCS (i-1) + delta-MCS; wherein MCS (i-1) is the MCS value of the last transmitted TB block, and MCS (i) is the MCS value of the subsequent TB block to be transmitted; the base station calculates the size of the PRB resource required for the subsequent transmission of the transport block based on MCS (i), and informs the terminal of the index of MCS (i) in the DCI Format command Format 1_1/1_ 2.

In the above, the present application provides a link adaptive adjustment method based on a terminal fast feedback delta-MCS. And provides a specific method for the base station to configure the target BLER of the terminal, the terminal to report delta-MCS and the base station side to calculate MCS. The base station in the application can improve the reporting precision of the sub-band CQI by configuring the bit width of the sub-band CQI reported by the UE, and provides a prerequisite for the base station to accurately select the MCS of the scheduling service so as to improve the transmission reliability of the service; furthermore, according to the delta-MCS reporting mechanism based on HARQ-ACK, the UE side accurately predicts the delta-MCS, the value of the delta-MCS and the HARQ-ACK codebook are fed back together, the response speed of the UE side can be greatly increased, the feedback accuracy of the UE side is fully utilized, the target BLER can reach more than 0.001%, the timeliness and the accuracy can be greatly improved, and the MCS adjusting effect of the outer loop link self-adaptive method is effectively improved. In addition, the base station configures different target BLERs for the UE, and the base station side accurately selects an MCS for the UE by combining the size TBS of the transmission block; the method provides a foundation for accurately selecting the MCS for the small packet service (such as 0-256 bits) in the URLLC application scene, and provides configuration and application flexibility for different high-reliability application scenes (such as 0.1%, 0.01%, 0.001%, 0.0001% and the like).

It should be understood that, although the steps in the flowcharts of fig. 2 and 5 are shown in sequence as indicated by the arrows, the steps are not necessarily performed in sequence as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 2 and 5 may include multiple sub-steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of performing the sub-steps or stages is not necessarily sequential, but may be performed alternately or alternately with other steps or at least some of the sub-steps or stages of other steps.

In one embodiment, as shown in fig. 6, a link adaptive adjusting apparatus is provided, which is described by taking the apparatus as an example for being applied to the terminal 102 in fig. 1, and the apparatus includes:

a message receiving module 610, configured to receive a configuration message transmitted by a base station; the configuration message is Channel State Information (CSI) report configuration containing a Channel Quality Indicator (CQI) report format and link parameters; the channel quality indicator CQI reporting format is sub-band reporting; the link parameters comprise a CQI bit width format and a target BLER value;

a reporting module 620, configured to complete subband CQI measurement based on the configuration message, and report a CSI measurement report to the base station; the CSI measurement report contains subband CQI measurements; the CSI measurement report is used for indicating the base station to acquire the adaptive modulation and coding strategy MCS value of the inner ring link; and is used for obtaining MCS increment delta-MCS based on the configuration message, and reporting HARQ-ACK information to the base station; the HARQ-ACK information comprises a hybrid automatic repeat request response HARQ-ACK codebook and MCS increment delta-MCS; and the HARQ-ACK information is used for indicating the base station to acquire the adaptive modulation and coding strategy MCS value of the outer ring link.

For specific limitations of the link adaptive adjustment apparatus implemented from the terminal perspective, reference may be made to the above limitations of the link adaptive adjustment method implemented from the terminal perspective, and details are not repeated here. The modules in the link adaptive adjustment apparatus implemented from the terminal perspective may be wholly or partially implemented by software, hardware, and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation.

In one embodiment, as shown in fig. 7, a link adaptive adjusting apparatus is provided, which is described by taking the apparatus as an example for being applied to the base station 104 in fig. 1, and the apparatus includes:

a message output module 710 for transmitting the configuration message to the terminal; the configuration message is Channel State Information (CSI) report configuration containing a Channel Quality Indicator (CQI) report format and link parameters; the channel quality indicator CQI reporting format is sub-band reporting; the link parameters comprise a CQI bit width format and a target BLER value; the configuration message is used for indicating the terminal to complete sub-band CQI measurement so as to report a CSI measurement report and acquiring MCS increment delta-MCS to report HARQ-ACK information;

an MCS value obtaining module 720, configured to receive a CSI measurement report reported by the terminal, and obtain an MCS value of an inner-loop link adaptive modulation and coding strategy according to the CSI measurement report; the CSI measurement report contains subband CQI measurements; receiving HARQ-ACK information reported by a terminal, and acquiring an outer loop link adaptive modulation and coding strategy MCS value according to the HARQ-ACK information; the HARQ-ACK information includes a hybrid automatic repeat request acknowledgement HARQ-ACK codebook and an MCS delta-MCS.

For specific limitations of the link adaptive adjustment apparatus implemented from the perspective of the base station, reference may be made to the above limitations of the link adaptive adjustment method implemented from the perspective of the base station, and details are not repeated here. The modules in the link adaptive adjustment apparatus implemented from the perspective of the base station may be implemented in whole or in part by software, hardware, and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation.

In one embodiment, a link adaptive adjustment system is provided, which includes a base station and a terminal connected to the base station; wherein:

In order to further explain the scheme of the present application, a URLLC scenario is taken as an example, and the following description is given with reference to a specific embodiment.

As shown in fig. 8, a signaling interaction flow between an inner-loop link adaptive base station and a UE based on a sub-band CQI may specifically include:

s800: the base station sends UE capability query message UE capability Enquiry to UE, and adds a field whether supporting 4bits sub-band CQI or not under UE capability query message Phy-ParameterCommon cell, and the specific format is as follows: sub-CQI-4 bits estimated { supported } OptiONAL;

s801: the UE reports UE capability information UECapabilityinformation to a base station;

s802: the base station acquires the sub-band CQI bit width supported by the UE according to the sub-band-CQI-4 bits in the UE capability information;

s803: the base station judges whether the UE supports 4bits sub-band CQI according to the bit width supported by the obtained sub-band CQI; if yes, go to step S804; otherwise, go to step S805;

s804: a base station sends RRC connection reconfiguration message RRCRECONFITTION to UE, and configures CSI-report configuration- > reportFreqconfiguration- > cqi-FormatIndicator information elements into sub-bands to report subbandCQI; adding a new field sub-and-cqibits-format indicator estimated { n2, n4} under a CSI-report configuration- > reportFreqconfiguration cell, wherein the specific value is n4, namely the terminal configures a 4-bit sub-band CQI bit width format;

s805: a base station sends RRC connection reconfiguration message RRCRECONFITTION to UE, and configures CSI-report Configuration- > reportFreq Configuration- > cqi-FormatIndicator information elements into sub-bands to report subbandCQI; the CSI-report configuration- > re-portFreqconfiguration- > sub-base and cqi-bits-Format indicator is configured as n2 or is not configured by default.

S806: the UE reports a CSI measurement report to the base station, where the CSI measurement report carries a wideband CQI measurement value and a 4bits subband differential CQI measurement value (see table 1). It should be noted that, if the CSI measurement report includes steps S805 to S806, the CSI measurement report carries 2bits subband differential CQI measurement values.

S807: the base station calculates an inner-loop target MCS value based on a sub-band CQI value reported by the UE, a target BLER and the size TBS of a transmission block; the size of the transmission block is divided into several grades, such as: 0-256, 257-1000, 1001-1001, etc.; for the size of each TBS, a group of BLER-SINR curves with different MCS values (0-28) is obtained through link simulation, and under the condition that target BLER and SINR (or CQI values) are determined, a target MCS value corresponding to the MCS curve meeting the BLER and SINR conditions at the same time is obtained through off-line calculation or table lookup, so that the accuracy of the obtained inner-loop target MCS can be improved.

S808: the base station schedules the PDSCH resources for the UE through a PDCCH DCI Format command Format 1_1/1_2, and notifies the UE of the inner loop target MCS value calculated in step S807 in the DCI Format;

s809: and the UE feeds back the HARQ-ACK information on the PUCCH resource indicated by the DCI format. Note that the HARQ-ACK information in step S809 is different from the HARQ-ACK information appearing in step S907 in fig. 9, and the HARQ-ACK information in step S809 does not include the delta-MCS value.

Further, as shown in fig. 9, a delta-MCS-based outer loop link adaptive base station and UE signaling interaction flow specifically includes:

s900: the base station sends UE capability query message UE capability Enquiry to UE, and whether an increment MCS report field is supported or not is newly added under a UE capability query message Phy-ParameterCommon cell, and the specific format is as follows: delta-MCS-Report estimated { supported } OPTIONAL;

s901: the UE reports UE capability information UECapabilityinformation to a base station;

s902: the base station acquires whether the UE supports the delta-MCS-Report function or not according to the field delta-MCS-Report in the UE capability information;

s903: the base station judges whether the UE supports a delta-MCS reporting function or not according to the obtained delta-MCS-Report field; if yes, go to step S904; otherwise, go to step S905;

s904: a base station sends RRC connection reconfiguration message RRCRECONFITTION to UE, and configures CSI-report configuration- > reportFreqconfiguration- > cqi-FormatIndicator information elements into sub-bands to report subbandCQI; the new field target-Bler is added under the CSI-report config cell, and the specific format is as follows: target-Bler ENUMERATED { value1, value2, value3, … }; wherein, value1 is 10%, value2 is 0.1%, value3 is 0.01%, value4 is 0.001%, value5 is 0.0001%, etc.;

s905: a base station sends RRC connection reconfiguration message RRCRECONFITTION to UE, and configures CSI-report configuration- > reportFreqconfiguration- > cqi-FormatIndicator information elements into sub-bands to report subbandCQI; after the execution of step S905 is confirmed, the process cannot proceed to subsequent steps S906 to S909, that is, the execution sequence in fig. 9 proceeds from step S904 to step S906.

S906: the UE calculates a delta-MCS value which needs to be met if the downlink service reaches a target-Bler performance index based on a field target-Bler in a RRCReconfiguration- > CSI-report configuration cell and an MCS value used by a current transmission block; wherein, delta-MCS is IMCS _ tgt-IMCS, IMCS _ tgt is the maximum MCS index to reach the target BLER estimate, and IMCS is the MCS index value of the currently received TB block; under the condition that a certain LDPC decoding iteration number is selected, the terminal determines the value of delta-MCS according to the relation between the ratio of parity check failure and total parity check and the SNR curve;

s907: the UE reports HARQ-ACK and delta-MCS information on a PUCCH, wherein the delta-MCS is added behind the HARQ-ACK information by 1-2 bits;

s908: the base station calculates an outer loop target MCS value based on the delta-MCS value reported by the UE, wherein MCS (i) is MCS (i-1) + delta-MCS; wherein MCS (i-1) is the MCS value of the last transmitted TB block, and MCS (i) is the MCS value of the subsequent TB block to be transmitted;

s909: the base station calculates the size of the PRB resource required for the subsequent transmission of the transport block based on MCS (i), and informs the terminal of the index of MCS (i) in the DCI Format command Format 1_1/1_ 2.

In the above, the base station configures the reporting period and offset of the periodic CSI report to the UE through an RRC message, where the format of the CQI report is subbandCQI, subband size and subband format, and the bit width format (n2, n4) and the target BLER value of the CQI. After receiving the CSI measurement report configuration information configured by the base station, the UE completes sub-band CQI measurement and reports a broadband CQI measurement value and a 4-bit differential sub-band CQI measurement value; and the UE calculates the delta-MCS value which needs to be adjusted on the base station side when the current service reaches the target BLER value based on the target BLER value configured by the base station and the MCS value of the current transmission block, and feeds the delta-MCS value and the HARQ-ACK information back to the base station. After receiving a sub-band CQI measurement report reported by UE, a base station determines an adaptive MCS value of an inner-loop link based on a sub-band CQI value, a target BLER and a transport block size TBS; and the base station determines the adaptive MCS value of the outer ring link based on the delta-MCS in the received HARQ-ACK codebook and informs the UE in the DCI information.

In an embodiment, a computer-readable storage medium is provided, on which a computer program is stored, which computer program, when being executed by a processor, carries out the steps of the above-mentioned method.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.

In the description herein, references to the description of "some embodiments," "other embodiments," "desired embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A link self-adaptive adjusting method is characterized in that the method is applied to a terminal; the method comprises the following steps:

completing sub-band CQI measurement based on the configuration message, and reporting a CSI measurement report to the base station; the CSI measurement report includes sub-band CQI measurement values; the CSI measurement report is used for indicating the base station to acquire an inner loop link adaptive Modulation and Coding Strategy (MCS) value;

acquiring MCS increment delta-MCS based on the configuration message, and reporting HARQ-ACK information to the base station; the HARQ-ACK information comprises a hybrid automatic repeat request response (HARQ-ACK) codebook and the MCS increment delta-MCS; and the HARQ-ACK information is used for indicating the base station to acquire an outer loop link adaptive modulation and coding strategy MCS value.

2. The link adaptive adjustment method according to claim 1, wherein the configuration message configures, for the CSI report, a radio resource control RRC message that is obtained by the base station by using a newly added field configuration and includes a CQI bit width format indicator and a plurality of target BLER values;

further comprising the steps of:

receiving a capability query message transmitted by the base station; the capability query message comprises a query field for presetting subband CQI bit width support capability and a query field for MCS increment delta-MCS reporting capability;

feeding back capability information to the base station based on the capability query message; and the capability information is used for indicating the base station to output the configuration message under the condition that the terminal is confirmed to have preset sub-band CQI bit width supporting capability and MCS increment delta-MCS reporting capability.

3. The link adaptive adjustment method according to claim 2, wherein the preset sub-band CQI bit width comprises a 4bits sub-band CQI bit width; the plurality of target BLER values range from 0.0001% to 10%.

4. The link adaptive adjustment method according to any one of claims 1 to 3, wherein the CSI measurement report further comprises a wideband CQI measurement value; the sub-band CQI measurement value is a sub-band differential CQI measurement value;

and the CSI measurement report is used for indicating the base station to determine a sub-band used by the terminal scheduling resource according to the broadband CQI measurement value and the sub-band differential CQI measurement value, and acquiring the adaptive modulation and coding strategy MCS value of the inner ring link through table look-up based on the transport block size TBS, the sub-band CQI measurement value and the target BLER value on the sub-band used by the terminal scheduling resource.

5. The link adaptive adjustment method according to any one of claims 1 to 3, wherein before the step of obtaining MCS delta-MCS based on the configuration message and reporting HARQ-ACK information to the base station, the method further comprises the steps of:

receiving a Downlink Control Information (DCI) command transmitted by the base station through a Physical Downlink Control Channel (PDCCH); the downlink control information DCI command comprises an MCS index value of a Physical Downlink Shared Channel (PDSCH);

the step of obtaining MCS increment delta-MCS based on the configuration message and reporting HARQ-ACK information to the base station comprises the following steps:

6. The link adaptive adjustment method of claim 5, wherein in the step of obtaining the MCS delta-MCS according to the MCS index value and the target BLER value, the MCS delta-MCS is obtained according to the following formula:

delta-MCS＝I_{MCS_tgt}-I_MCS

wherein, I_{MCS_tgt}A maximum MCS index estimated for achieving the target BLER value; i is_MCSAnd the MCS index value is obtained.

7. A link self-adaptive adjusting method is characterized in that the method is applied to a base station; the method comprises the following steps:

transmitting a configuration message to the terminal; the configuration message is Channel State Information (CSI) report configuration containing a Channel Quality Indicator (CQI) report format and link parameters; the channel quality indicator CQI reporting format is sub-band reporting; the link parameters comprise a CQI bit width format and a target BLER value; the configuration message is used for indicating the terminal to complete sub-band CQI measurement so as to report a CSI measurement report, and acquiring MCS increment delta-MCS reporting HARQ-ACK information;

receiving the CSI measurement report reported by the terminal, and acquiring an inner loop link adaptive Modulation and Coding Strategy (MCS) value according to the CSI measurement report; the CSI measurement report includes sub-band CQI measurement values;

receiving the HARQ-ACK information reported by the terminal, and acquiring an outer loop link adaptive Modulation and Coding Strategy (MCS) value according to the HARQ-ACK information; the HARQ-ACK information comprises a hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook and the MCS increment delta-MCS.

8. The link adaptive adjustment method according to claim 7, wherein the step of transmitting the configuration message to the terminal is preceded by the step of:

transmitting a transmission capability query message to the terminal; the capability query message comprises a query field for presetting subband CQI bit width support capability and a query field for MCS increment delta-MCS reporting capability;

under the condition that the capability information fed back by the terminal based on the capability query message is received, if the terminal is confirmed to have the preset sub-band CQI bit width supporting capability and the MCS increment delta-MCS reporting capability based on the capability information, generating and outputting the configuration message; the configuration message is a Radio Resource Control (RRC) message which is obtained by configuring the CSI report by using a newly added field and contains a CQI bit width format indicator and a plurality of target BLER values.

9. The link adaptive adjustment method according to claim 7 or 8, wherein the CSI measurement report further contains wideband CQI measurement value; the sub-band CQI measurement value is a sub-band differential CQI measurement value;

the step of obtaining the adaptive modulation and coding strategy MCS value of the inner loop link according to the CSI measurement report comprises:

determining a sub-band used by a terminal scheduling resource according to the broadband CQI measured value and the sub-band differential CQI measured value;

and on the subband used by the terminal scheduling resource, acquiring the adaptive modulation and coding strategy MCS value of the inner ring link through table look-up based on the transport block size TBS, the subband CQI measurement value and the target BLER value.

10. The method of claim 9, wherein the step of obtaining the inner loop link adaptive Modulation and Coding Scheme (MCS) value by looking up a table based on the Transport Block Size (TBS), the sub-band CQI measurement value and the target BLER value comprises:

according to the size TBS of the transmission block, inquiring and selecting a modulation and coding strategy MCS value adaptive to the inner-loop link from a link simulation curve; and the link simulation curve comprises a BLER-SINR-MCS curve which is obtained by simulation and corresponds to the size TBS of the transmission block in each span interval in the URLLC scene.

11. The link adaptive adjustment method according to claim 7 or 8, wherein in the step of obtaining the outer loop link adaptive modulation and coding scheme MCS value according to the HARQ-ACK information, the outer loop link adaptive modulation and coding scheme MCS value is obtained by using the following formula:

MCS(i)＝MCS(i-1)+delta-MCS；

wherein i represents a time slot; the delta-MCS is the MCS increment delta-MCS; MCS (i-1) is a modulation and coding strategy MCS value of the outer loop link self-adaption at the last time; and MCS (i) is the MCS value of the current outer loop link self-adaptive modulation and coding strategy.

12. A link adaptive adjustment device is characterized in that the device is applied to a terminal; the device comprises:

a reporting module, configured to complete sub-band CQI measurement based on the configuration message, and report a CSI measurement report to the base station; the CSI measurement report includes sub-band CQI measurement values; the CSI measurement report is used for indicating the base station to acquire an inner loop link adaptive Modulation and Coding Strategy (MCS) value; and is used for obtaining MCS increment delta-MCS based on the configuration message, and reporting HARQ-ACK information to the base station; the HARQ-ACK information comprises a hybrid automatic repeat request response (HARQ-ACK) codebook and the MCS increment delta-MCS; and the HARQ-ACK information is used for indicating the base station to acquire an outer loop link adaptive modulation and coding strategy MCS value.

13. A link adaptive adjustment device is characterized in that the device is applied to a base station; the device comprises:

the message output module is used for transmitting the configuration message to the terminal; the configuration message is Channel State Information (CSI) report configuration containing a Channel Quality Indicator (CQI) report format and link parameters; the channel quality indicator CQI reporting format is sub-band reporting; the link parameters comprise a CQI bit width format and a target BLER value; the configuration message is used for indicating the terminal to complete sub-band CQI measurement so as to report a CSI measurement report, and acquiring MCS increment delta-MCS reporting HARQ-ACK information;

an MCS value obtaining module, configured to receive the CSI measurement report reported by the terminal, and obtain an inner-loop link adaptive modulation and coding strategy MCS value according to the CSI measurement report; the CSI measurement report includes sub-band CQI measurement values; receiving the HARQ-ACK information reported by the terminal, and acquiring an outer loop link adaptive Modulation and Coding Strategy (MCS) value according to the HARQ-ACK information; the HARQ-ACK information comprises a hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook and the MCS increment delta-MCS.

14. A link self-adaptive adjustment system is characterized by comprising a base station and a terminal connected with the base station; wherein:

the terminal is configured to perform the steps of the method of any one of claims 1 to 6;

the base station is configured to perform the steps of the method of any of claims 7 to 11.

15. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 11.