WO2009132576A1

WO2009132576A1 - Obtaining method and device for mapping relationship between data mcs and cqi coding rate

Info

Publication number: WO2009132576A1
Application number: PCT/CN2009/071518
Authority: WO
Inventors: 陈实; 李元杰
Original assignee: 华为技术有限公司
Priority date: 2008-04-29
Filing date: 2009-04-28
Publication date: 2009-11-05
Also published as: CN101572585B; CN101572585A

Abstract

The embodiments of the present invention disclose an obtaining method and device for mapping relationship between data Modulation and Coding Scheme MCS and Channel Quality Indicator CQI coding rate. The method includes: obtaining CQI coding rate according to data MCS (s101); and obtaining mapping relationship between data MCS and CQI coding rate according to the CQI coding rate and the data MCS (s102). By using the embodiments of the present invention, after obtaining mapping relationship between data MCS and CQI coding rate, a base station is able to obtain CQI coding rate according to data MCS and the mapping relationship for uplink transmission use for UE. Therefore, a base station can configure different coding rates for data and CQI multiplexed in Physical Uplink Shared Channel PUSCH, respectively, and satisfy the transmission quality demand for each one.

Description

Method and device for obtaining mapping relationship between data MCS and CQI code rate The present application claims to be submitted to the Chinese Patent Office on April 29, 2008, the application number is 200810094391.2, and the invention name is "the acquisition method of the mapping relationship between the data MCS and the CQI code rate". The priority of the Chinese Patent Application, the entire disclosure of which is incorporated herein by reference.

Technical field

The present invention relates to the field of communications technologies, and in particular, to a method and apparatus for acquiring mapping relationship between data MCS and CQI code rate.

Background technique

In order to maintain the competitiveness of mobile communication systems and improve their performance and functions, the 3GPP organization has officially started the standardization of LTE (Long Term Evolution) systems.

The LTE physical layer technical specifications include: uplink control signaling, uplink reference signal, downlink control signaling, downlink reference signal, channel coding, rate matching, power control, and inter-cell interference coordination. The uplink control signaling includes: ACK/NACK, CQI (Channel Quality Indicator), and SR (Scheduling Request).

Generally, the uplink control signaling is transmitted on a PUCCH (Physical Uplink Control Channel), and the uplink data is transmitted on a PUSCH (Physical Uplink Shared Channel). If there is both uplink data and uplink control signaling, the uplink control signaling and the uplink data multiplexing are transmitted together on the PUSCH.

In the prior art, the MCS (Modulation and Coding Scheme) used for the uplink data is determined according to the channel condition of the uplink. If the channel condition of the uplink is good, a higher MCS value can be used; if the channel condition of the uplink is poor, a lower MCS value must be used. Therefore, the correspondence between the SNR (Signal Noise Ratio) and the data MCS is stored at both ends of the transmission and reception. The eNodeB (evolved NodeB) searches for the correspondence table according to the estimated SNR value, and uses the MCS of the uplink data to pass the PDCCH (Physical). Downl ink Control Channe l, the downlink physical control channel) informs the UE.

In the process of implementing the present invention, the inventors found that the implementation in the prior art has the following problems:

The prior art only considers the case where data is transmitted on the PUSCH. When there is CQI transmission on the PUSCH, the CQI and data adopt the same modulation method on the PUSCH. However, when CQI and data are multiplexed on PUSCH, HARQ (Hybrid Automatic Repeat Reques t) is adopted for data, and CQI does not adopt HARQ, and data and CQI have different BLER requirements. Therefore, for the case where there are both data transmission and CQI transmission on the PUSCH, if the CQI and the data use the same MCS, the CQI will not meet its BLER (Block Error Rate) requirement.

Summary of the invention

An embodiment of the present invention provides a method and an apparatus for acquiring a mapping relationship between a data MCS and a CQI code rate, which are used to enable a base station to separately configure different code rates for data multiplexed on a PUSCH channel and CQI to meet respective requirements. .

To achieve the above objective, an embodiment of the present invention provides a method for obtaining a mapping relationship between a data MCS and a CQI code rate, including:

According to the modulation and coding mode of the data, the MCS obtains the channel rate indication CQI code rate;

A mapping relationship between the data MCS and the CQI code rate is obtained based on the code rate of the CQI and the MCS of the data.

The embodiment of the present invention further provides an apparatus for acquiring a mapping relationship between a data MCS and a CQI code rate, which includes:

a code rate obtaining unit, configured to acquire a code rate of the CQI according to the MCS of the data;

The mapping relationship obtaining unit is configured to obtain a mapping relationship between the data MCS and the CQI code rate according to the code rate of the CQI acquired by the code rate acquiring unit and the MCS of the data.

Embodiments of the present invention have the following advantages over the prior art:

After obtaining the mapping relationship between the data MCS and the CQI code rate, the base station can be based on the data MCS and The above mapping relationship obtains the code rate of the CQI for use by the UE for uplink transmission. Therefore, the base station can configure different code rates for the data multiplexed on the PUSCH channel and the CQI to meet the respective transmission quality requirements.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.

1 is a flow chart showing an acquisition method of a mapping relationship between data MCS and CQI code rate in an embodiment of the present invention;

2 is a flow chart showing an acquisition method of a mapping relationship between data MCS and CQI code rate in another embodiment of the present invention;

3 is a flow chart showing an acquisition method of a mapping relationship between data MCS and CQI code rate in another embodiment of the present invention;

4 is a flow chart showing an acquisition method of a mapping relationship between data MCS and CQI code rate in another embodiment of the present invention;

5 is a flow chart showing an acquisition method of a mapping relationship between data MCS and CQI code rate in another embodiment of the present invention;

6 is a schematic structural diagram of an apparatus for acquiring a mapping relationship between a data MCS and a CQI code rate in an embodiment of the present invention;

7A-7D are structural diagrams of an apparatus for acquiring a mapping relationship between data MCS and CQI code rates in different situations in an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, those of ordinary skill in the art do not make All other embodiments obtained under the premise of creative labor are within the scope of the invention. When the CQI and the data are multiplexed on the PUSCH, the CQI and the data adopt the same modulation mode. At the same time, since the data adopts HARQ, and the CQI does not adopt HARQ, and the BLER requirements of the data and the CQI are different, the code rate and data of the CQI are There is an offset between the code rates. In the embodiment of the present invention, a method for obtaining a mapping relationship between a data MCS and a CQI code rate is provided, and a mapping relationship between a data MCS and a CQI code rate is obtained by obtaining an offset value. As shown in Figure 1, the method includes:

Step s l 01. Obtain the CQI code rate according to the MCS of the data.

Step s l 02: Obtain a mapping relationship between the data MCS and the CQI code rate according to the code rate of the CQI and the MCS of the data.

After obtaining the mapping relationship between the data MCS and the CQI code rate by using the method provided by the foregoing embodiment, the base station can obtain the CQI code rate according to the data MCS and the foregoing mapping relationship, and use the uplink transmission of the UE. Therefore, the base station can configure different code rates for the data multiplexed on the PUSCH channel and the CQI to meet the respective transmission quality requirements. In the embodiment of the present invention, an acquisition method for mapping the relationship between the data MCS and the CQI code rate is provided, which is applied when the CQI and the data are multiplexed on the PUSCH. As shown in Figure 2, the method includes the following steps:

Step s ² 01. The entire SNR (dB) interval (from negative infinity to positive infinity) is quantized into segments, and the number of segments is the number of data MCS on the PUSCH.

Step s202: Determine, for a certain SNR value, a code rate required for the data according to a modulation mode of the data and a transmission quality requirement (such as a BLER requirement).

Step s203: The CQI adopts the same SNR and modulation mode as the data, and determines the code rate of the CQI according to the transmission quality requirement of the CQI (such as the BLER requirement). Specifically, the correspondence between the transmission quality requirement of the CQI and the CQI code rate may be established in advance, and the code rate of the CQ I may be determined according to the transmission quality requirements of the MCS and the CQI of the data and the corresponding correspondence.

Step s204: Obtain a mapping relationship between the data MCS and the CQI code rate. For example, the data will The code rate minus the code rate of the CQI can obtain the code rate offset value in a given SNR and modulation mode, and the offset value is used as a mapping relationship between the data MCS and the CQI code rate. In another embodiment of the present invention, a method for obtaining a mapping relationship between a data MCS and a CQI code rate is further provided, where the CQI and the data are multiplexed on the PUSCH.

The coding mode of CQI on PUSCH is related to the number of information bits: When the number of information bits of CQI is less than or equal to 11 bits, the Reed-Muller code of base code (32, 13) is used; when CQI When the number of information bits is larger than 11 bits, a tail-biting convolutional code of 1/3 is used, and rate matching is performed. In this embodiment, when the mapping relationship between the data MCS and the CQI code rate is established, the influence of the number of CQI information bits is involved.

Table 1 lists the code rates required to reach /oBLER when the number of CQI information bits is 4, 7, and 11, respectively. The simulation conditions are: AWGN (Additive White Gaussian Noise) channel, 1 transmit antenna and 1 receive antenna. The code rate required for different CQI information bits to reach 1% BLER

As can be seen from Table 1, the code rate of CQI is closely related to the number of information bits. For a code rate of 0.182, the CQI of the 11-bit information bits can operate with SNR = ldB; and the CQI of the 4-bit information bits must operate with SNR = 2 dB.

If the CQIs of different information bits correspond to the same code rate, then some information bits The number of CQIs does not meet the BLER requirements; either the CQI of some information bits wastes the modulation symbols on the PUSCH and exacerbates the impact on data transmission.

Considering the influence of the CQI information bit number on its code rate, in this embodiment, the method for obtaining the mapping relationship between the data MCS and the CQI code rate is as shown in FIG. 3, and includes the following steps:

Step s 301. The entire SNR (dB) interval (from negative infinity to positive infinity) is quantized into segments, and the number of segments is the number of data MCS on the PUSCH.

Step s 302: Determine, for a certain SNR value, a code rate required for the data according to a modulation mode of the data and a transmission quality requirement (such as a BLER requirement).

Step s 303: The CQI adopts the same SNR and modulation mode as the data, and determines the code rate required for the CQI corresponding according to the information bit number of the CQI and the transmission quality requirement (such as the BLER requirement), that is, the code corresponding to the number of bits of different CQI information. The rate is different. Specifically, the correspondence between the transmission quality requirement of the CQI and the CQI code rate of each information bit number may be established in advance for each CQI information bit number, and may be based on the MCS, CQI transmission quality requirement, and CQI information of the data. The number of bits and the above correspondence determine the code rate of the CQI.

Step s 304: Obtain a mapping relationship between data MCS and CQI code rate. For example, under the condition that the SNR, the modulation mode, and the number of CQI information bits are constant, the code rate of the data is subtracted from the code rate of the CQI to obtain a code rate offset value in a given SNR and modulation mode, and the offset value is obtained. As a mapping relationship between data MCS and CQI code rate.

In the method provided in this embodiment, the influence of the number of CQI information bits on its code rate is considered, so that the mapping relationship between the data MCS and the CQI code rate can be accurately reflected. Another embodiment of the present invention further provides a method for obtaining a mapping relationship between data MCS and CQI code rates, which is applied when CQI and data are multiplexed on PUSCH.

In the previous embodiment, a mapping relationship between the data MCS and the CQI code rate is established for each CQI information bit number, which can accurately reflect the mapping relationship between the data MCS and the CQ I code rate. In this embodiment, CQIs with similar code rates but different information bits are grouped into one group, and are used for each group. The same representation of the CQI code rate and the transmission quality requirements of all information bit numbers CQI (such as BLER requirements) can further reduce the implementation complexity while maintaining performance. In this embodiment, the method for obtaining the mapping relationship between the data MCS and the CQI code rate is as shown in FIG. 4, and includes the following steps: Step s ⁴ 01. Quantify the entire SNR (dB) interval (from negative infinity to positive infinity) into several The number of segments is the number of data MCS on the PUSCH.

Step s402: Determine, for a certain SNR value, a code rate required for the data according to a modulation mode of the data and a transmission quality requirement (such as a BLER requirement).

Step s403: The CQI adopts the same SNR and modulation method as the data, according to the transmission quality requirement of the CQI (such as the BLER requirement), the code rates are similar (if the difference between the code rates is less than 5% or other preset values), but the information bits are different. The CQIs are grouped together. The CQI in a group uses the same CQI code rate and satisfies the transmission quality requirements of all information bit numbers CQI. Therefore, the CQI code rates corresponding to different sets of CQIs are different. Specifically, the code rate required for the number of different CQI information bits shown in Table 1 to reach 1% BLER is used. For the case of SNR = 2, the number of CQI information bits can be 7 (the bit rate in this case) 0. 226) and the CQI information bit number is 11 (the code rate in this case is 0. 234) is grouped, and 0. 226 is used as the representative CQI code rate of the group. After the group is determined, the correspondence between the transmission quality requirement of each group of CQIs and the CQI code rate may be pre-established for each group of CQI code rates, and the transmission quality requirements of the MCS and CQI of the data may be determined according to the CQI. The grouping, and the above correspondence determine the code rate of the CQI.

Step s404: Obtain a mapping relationship between the data MCS and the CQI code rate. For example, under certain conditions of SNR, modulation mode and CQI packet, the code rate of the data is subtracted from the code rate of the CQI to obtain the code rate offset value in a given SNR and modulation mode, and the offset value is taken as the data MCS. The mapping relationship between the CQI code rate and the CQI code rate.

In the method provided by this embodiment, the performance and implementation complexity are comprehensively considered, and according to the grouping situation of the CQI, the mapping relationship between the data MCS and the CQI code rate can be established. Another embodiment of the present invention further provides a mapping relationship between data MCS and CQI code rate. The method is applied to the case where the CQI and the data are multiplexed on the PUSCH.

The method of grouping the CQIs is still used in the present embodiment, and the CQIs are grouped according to the code rate in the previous embodiment, in which the CQIs are grouped according to the number of information bits in this embodiment. Specifically, according to the CQI transmission quality requirement (such as the BLER requirement), the CQI information bit number is grouped, and the CQI in one group adopts the same CQI code rate, and can meet the transmission quality requirement of all information bit numbers CQI in the group.

In this embodiment, the method for obtaining the mapping relationship between the data MCS and the CQI code rate is as shown in FIG. 5, and includes the following steps:

Step s501: Quantify the entire SNR (dB) interval (from negative infinity to positive infinity) into segments, and the number of segments is the number of MCSs of data on the PUSCH.

Step s502: Determine, for a certain SNR value, a code rate required for the data according to a modulation mode of the data and a transmission quality requirement (such as a BLER requirement).

Step s503, CQI adopts the same SNR and modulation method as the data. According to the CQI transmission quality requirement (such as BLER requirement), the CQI with information bits larger than 11 bits is classified into a large group by CQI coding, and the CQI with information bits less than or equal to 11 bits is classified into a large group. Each group is divided into several groups (such as a large group of 4 - 11 bits, 3 groups, 4, 5, 6 - groups, 7 , 8 , 9 groups, 10, 11 - groups). The CQI in a group uses the same CQI code rate and satisfies the transmission quality requirements of all information bits CQI in the group. Therefore, the CQIs of different groups correspond to different code rates. After the group is determined, the correspondence between the transmission quality requirement of each group of CQIs and the CQI code rate may be established in advance for each group of CQI code rates, and the transmission quality requirements of the MCS and CQI of the data may be determined according to the CQI. The grouping, and the above correspondence determine the code rate of the CQI.

Step s504: Obtain a mapping relationship between the data MCS and the CQI code rate. For example, under certain conditions of SNR, modulation mode and CQI packet, the code rate of the data is subtracted from the code rate of the CQI to obtain the code rate offset value in a given SNR and modulation mode, and the offset value is taken as the data MCS. The mapping relationship between the CQI code rate and the CQI code rate. In the method provided by this embodiment, the performance and implementation complexity are comprehensively considered, and according to the grouping situation of the CQI, the mapping relationship between the data MCS and the CQI code rate can be established.

It should be noted that, in the description of the foregoing embodiment, the transmission quality requirement may be a BLER, or a parameter indicating a transmission quality requirement such as a BER (Bi t Error Rate).

After the mapping between the data MCS and the CQI code rate is obtained by using the embodiment of the present invention, the base station can obtain the CQI code rate according to the data MCS and the foregoing mapping relationship, and use the uplink transmission of the UE. Therefore, the base station can configure different code rates for the data multiplexed on the PUSCH channel and the CQI to meet the respective transmission quality requirements. An embodiment of the present invention further provides an apparatus for acquiring a mapping relationship between a data MCS and a CQI code rate. As shown in FIG. 6, the method includes:

The code rate obtaining unit 10 is configured to obtain a code rate of the CQI according to the MCS of the data.

The mapping relationship obtaining unit 20 is configured to obtain a mapping relationship between the data MCS and the CQI code rate according to the code rate of the CQI acquired by the code rate obtaining unit 10 and the MCS of the data. In other embodiments, as shown in FIG. 7A, the device may further include:

The first correspondence establishing unit 30 is configured to establish a correspondence between a transmission quality requirement of the CQI and a CQI code rate.

At this time, the code rate obtaining unit 10 specifically includes: a first rate acquisition sub-unit 11 configured to acquire according to the MCS of the data, the transmission quality requirement of the CQI, and the correspondence established by the first correspondence establishing unit 30. CQI code rate. In addition to the code rate for obtaining the CQI according to the MCS of the data, in other embodiments, the code rate obtaining unit 10 may be further configured to obtain the code rate of the CQI according to the number of information bits of the CQI. As shown in FIG. 7B, the device may further include:

a second correspondence establishing unit 40, configured to separately establish information bit numbers for each CQI The correspondence between the transmission quality requirement of each information bit number CQI and the CQI code rate.

At this time, the code rate obtaining unit 10 specifically includes: a second code rate obtaining sub-unit 12, configured to establish a unit according to the MCS of the data, the transmission quality requirement of the CQI, the number of information bits of the CQI, and the second correspondence relationship The corresponding relationship established by 40 acquires the code rate of the CQI. In addition to the code rate acquisition unit 10 for obtaining the CQI code rate according to the MCS of the data, in other embodiments, as shown in FIG. 7C, the apparatus may further include:

The first grouping unit 50 is configured to group the CQIs whose difference between the code rates is smaller than the preset value but the number of information bits is different according to the transmission quality requirement of the CQI; each group adopts the same representative CQI code rate.

The third correspondence establishing unit 60 is configured to establish, for the group established by the first grouping unit 50, a correspondence between a transmission quality requirement of each group of CQIs and a representative CQI code rate.

At this time, the code rate obtaining unit 10 specifically includes: a third rate acquiring sub-unit 13 configured to be established according to the MCS of the data, the transmission quality requirement of the CQI, the group where the CQI is located, and the third correspondence establishing unit 60. Correspondence relationship, the code rate required to obtain CQI. In addition to the code rate acquisition unit 10 for obtaining the CQI code rate according to the MCS of the data, in other embodiments, as shown in FIG. 7D, the apparatus may further include:

The second grouping unit 70 is configured to group the CQI according to the information bit number according to the CQI transmission quality requirement, and each group adopts the same representative CQI code rate.

The fourth correspondence establishing unit 80 is configured to establish, for the packets established by the second grouping unit 70, a correspondence between a transmission quality requirement of each group of CQIs and a representative CQI code rate.

At this time, the code rate obtaining unit 10 specifically includes: a fourth rate acquiring subunit 14 configured to be established according to the MCS of the data, the transmission quality requirement of the CQI, the group where the CQI is located, and the fourth correspondence establishing unit 80. Correspondence relationship, the code rate required to obtain CQI. Obtaining a mapping between data MCS and CQI code rate by using the apparatus provided by the embodiment of the present invention After the relationship, the base station can obtain the code rate of the CQ I according to the data MCS and the foregoing mapping relationship, and use the uplink transmission of the UE. Therefore, the base station can configure different code rates for the data multiplexed on the PUSCH channel and the CQI to meet the respective transmission quality requirements.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by hardware, or can be implemented by means of software plus necessary general hardware platform, and the technical solution of the present invention. It can be embodied in the form of a software product that can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.), including a number of instructions for making a computer device (may It is a personal computer, a server, or a network device, etc.) that performs the methods described in various embodiments of the present invention.

It should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: The technical solutions described in the foregoing embodiments are modified, or some of the technical features are equivalently replaced; and the modifications or substitutions do not deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

Claim

A method for obtaining a mapping relationship between a MCS and a CQI code rate, comprising: obtaining a channel quality indicator CQI code rate according to a modulation coding mode of the data;

And obtaining a mapping relationship between the data MCS and the CQI code rate according to the code rate of the CQI and the MCS of the data.

2. The method for obtaining a mapping relationship between a data MCS and a CQI code rate according to claim 1, wherein the method further comprises: establishing a correspondence between a transmission quality requirement of the CQI and a CQI code rate; Obtaining the code rate of the CQI by the data MCS includes: acquiring a code rate of the CQI according to an MCS of the data, a transmission quality requirement of the CQI, and a correspondence between a transmission quality requirement of the CQI and a CQI code rate.

3. The method for obtaining a mapping relationship between a data MCS and a CQI code rate according to claim 1, wherein the method further comprises: acquiring a code rate of the CQI according to a number of information bits of the CQI.

The method for obtaining the mapping relationship between the data MCS and the CQI code rate according to claim 3, wherein the method further comprises: establishing a transmission quality of each information bit number CQI for each CQI information bit number Correspondence with the CQI code rate is required;

The obtaining a CQI according to the data MCS includes: an MCS according to the data, a transmission quality requirement of the CQI, a number of information bits of the CQI, and a transmission quality requirement and a CQI of each information bit number CQI Corresponding relationship between code rates, and obtaining a code rate of the CQI.

The method for obtaining a mapping relationship between the data MCS and the CQI code rate according to claim 1, wherein the method further comprises: acquiring a code rate of the CQI according to a representative CQI code rate of the packet in which the CQI is located.

The method for obtaining the mapping relationship between the data MCS and the CQI code rate according to claim 5, wherein the method further comprises: according to the transmission quality requirement of the CQI, the difference between the code rates is less than a preset value, and the information bit The number of different CQIs is grouped into one group, and the CQIs in a group adopt the same representative CQI code rate; respectively, the correspondence relationship between the transmission quality requirements of each group of CQIs and the representative CQI code rate is established;

The obtaining a code rate of the CQI according to the data MCS includes: according to the MCS of the data, the CQI The transmission quality requirement, the packet in which the CQI is located, and the corresponding relationship acquire the code rate of the CQI.

The method for acquiring the mapping relationship between the data MCS and the CQ I code rate according to claim 5, wherein the method further comprises: grouping the CQI according to the information bit number according to the transmission quality requirement of the CQ I, a group The CQI in the same uses the same representative CQI code rate, and establishes the correspondence between the transmission quality requirements of each group of CQIs and the CQ I code rate respectively;

The obtaining a code rate of the CQI according to the data MCS includes: acquiring a code rate of the CQI according to an MCS of the data, a transmission quality requirement of the CQI, a packet in which the CQI is located, and the corresponding relationship.

8. The method for obtaining a mapping relationship between data MCS and CQI code rates according to claim 2, 4, 6 or 7, wherein the transmission quality requirement is a block error rate BLER or a bit error rate BER.

9. A device for acquiring a mapping relationship between a data rate of a MCS and a CQI, the method comprising: a code rate obtaining unit, configured to acquire a code rate of a CQI according to an MCS of the data;

The mapping relationship obtaining unit is configured to obtain a mapping relationship between the data MCS and the CQ I code rate according to the code rate of the CQI acquired by the code rate acquiring unit and the MCS of the data.

10. The apparatus for acquiring a mapping relationship between a data MCS and a CQI code rate according to claim 9, wherein the method further comprises:

a first correspondence establishing unit, configured to establish a correspondence between a transmission quality requirement of the CQI and a CQ I code rate;

The code rate acquisition unit includes: a first rate acquisition sub-unit, configured to acquire, according to the MCS of the data, the transmission quality requirement of the CQI, and the correspondence established by the first correspondence establishment unit CQI code rate.

11. The apparatus for acquiring a mapping relationship between a data MCS and a CQI code rate according to claim 9, wherein the method further comprises:

a second correspondence establishing unit, configured to establish a correspondence between a transmission quality requirement of each information bit number CQI and a CQI code rate for each information bit number of each CQI; The code rate acquisition unit includes: a second code rate acquisition subunit, configured to establish a unit according to the MCS of the data, the transmission quality requirement of the CQI, the information bit number of the CQI, and the second correspondence relationship Establishing the corresponding relationship, and acquiring a code rate of the CQI.

12. The apparatus for acquiring a mapping relationship between a data MCS and a CQI code rate according to claim 9, wherein the method further comprises:

a first grouping unit, configured to group CQIs with different difference between code rates than preset values but different information bits according to CQI transmission quality requirements; CQIs in a group adopt the same representative CQI code rate; a correspondence establishing unit, configured to establish, respectively, a correspondence between a transmission quality requirement of each group of CQIs and a representative CQI code rate for the group established by the grouping unit;

The code rate obtaining unit includes: a third rate acquiring subunit, configured to establish, according to the MCS of the data, the transmission quality requirement of the CQI, the group where the CQI is located, and the third correspondence establishing unit Correspondence relationship, the code rate required to obtain the CQI.

13. The apparatus for acquiring a mapping relationship between a data MCS and a CQI code rate according to claim 9, wherein the method further comprises:

a second grouping unit, configured to group the CQI according to the information bit number according to the CQI transmission quality requirement, and the CQI in the group uses the same representative CQI code rate;

a fourth correspondence establishing unit, configured to establish, for the group established by the second grouping unit, a correspondence between a transmission quality requirement of each group of CQIs and a representative CQI code rate;

The code rate acquisition unit includes: a fourth rate acquisition subunit, configured to acquire the CQI according to an MCS of the data, a transmission quality requirement of the CQI, a packet in which the CQI is located, and the corresponding relationship The code rate.