CN101572585B - Method and device for acquiring mapping relation between data MCS and CQI code rate - Google Patents

Abstract

The embodiment of the invention discloses a method and a device for acquiring the mapping relationship between the data MCS and the CQI code rate. The method includes: obtaining the code rate of the channel quality indication CQI according to the modulation and coding mode MCS of the data; and obtaining the 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. By using the embodiment of the present invention, after obtaining the mapping relationship between the data MCS and the CQI code rate, the base station can obtain the CQI code rate according to the data MCS and the above mapping relationship for use in UE uplink transmission. Therefore, the base station can configure different code rates for the data and CQI multiplexed on the PUSCH channel to meet respective transmission quality requirements.

Description

Method and device for obtaining mapping relationship between data MCS and CQI code rate

technical field

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

Background technique

In order to maintain the competitiveness of the third-generation mobile communication system and improve its performance and functions in an all-round way, the 3GPP organization has officially started the standardization work of the third-generation mobile communication LTE (Long Term Evolution, Long Term Evolution) system. the

LTE physical layer technical specifications involve: uplink control signaling, uplink reference signal, downlink control signaling, downlink reference signal, channel coding, rate matching, power control, inter-cell interference coordination, etc. Wherein, the uplink control signaling includes: ACK/NACK, CQI (Channel Quality Indicator, channel quality indicator) and SR (Scheduling Request, scheduling request). the

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

In the prior art, the MCS (Modulation and Coding Scheme, modulation and coding scheme) adopted by 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 corresponding relationship between SNR (Signal Noise Ratio, signal-to-noise ratio) and data MCS is preserved at both ends of the transceiver. The eNodeB (evolved NodeB, evolved base station) looks up this correspondence table according to the estimated SNR value, and notifies the UD of the MCS used for the uplink data through the PDCCH (Physical Downlink Control Channel, downlink physical control channel). the

In the process of realizing the present invention, the inventor finds that the implementation in the prior art has the following problems:

The prior art only considers the case of data transmission on the PUSCH. When there is CQI transmission on the PUSCH at the same time, the CQI and data adopt the same modulation mode on the PUSCH. However, when CQI and data are multiplexed on PUSCH, since data uses HARQ (Hybrid Automatic Repeat Request, Hybrid Automatic Repeat Request), CQI does not use HARQ, and data and CQI have different BLER requirements. For the case of both data transmission and CQI transmission on the PUSCH, if the CQI and data use the same MCS, the CQI will not meet its BLER (Block Error Rate, block error rate) requirements. the

Contents of the invention

Embodiments of the present invention provide a method and device for obtaining a mapping relationship between data MCS and CQI code rate, which is used to enable the base station to configure different code rates for the data and CQI multiplexed on the PUSCH channel to meet their respective requirements . the

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

Obtain the code rate of the channel quality indicator CQI according to the modulation and coding mode MCS of the data;

According to the code rate of the CQI and the MCS of the data, obtain the mapping relationship between the data MCS and the CQI code rate;

The acquisition of the code rate of the channel quality indicator CQI according to the modulation and coding mode MCS of the data specifically includes:

Quantify the entire SNR interval into multiple segments, and the number of segments is the number of data MCS on the uplink physical shared channel PUSCH; the SNR value in each segment determines the code rate required for the corresponding data according to the modulation mode and transmission quality requirements of the data; The channel quality indicator CQI adopts the same signal-to-noise ratio SNR and data modulation mode as the data, and the code rate of the CQI is determined according to the transmission quality requirements of the channel quality indicator CQI;

According to the code rate of the CQI and the MCS of the data, obtaining the mapping relationship between the data MCS and the CQI code rate specifically includes:

Subtracting the code rate of the data from the code rate of the CQI can obtain a code rate offset value under a given SNR and modulation mode, and use the offset value as a mapping relationship between the data MCS and the CQI code rate. the

Embodiments of the present invention also provide a device for obtaining a mapping relationship between data MCS and CQI code rate, which is characterized in that it includes:

A code rate acquisition unit is used to obtain the code rate of the CQI according to the MCS of the data;

A mapping relationship acquisition unit, used to obtain the mapping relationship between the data MCS and the CQI code rate according to the code rate of the CQI acquired by the code rate acquisition unit and the MCS of the data;

The acquisition of the code rate of the channel quality indicator CQI according to the modulation and coding mode MCS of the data specifically includes:

Quantize the entire SNR interval into multiple segments, and the number of segments is the number of data MCS on the uplink physical shared channel PUSCH; the SNR value in each segment is determined according to the data modulation method and transmission quality requirements. ; The channel quality indicator CQI adopts the same signal-to-noise ratio SNR and data modulation mode as the data, and the code rate of the CQI is determined according to the transmission quality requirements of the channel quality indicator CQI;

According to the code rate of the CQI and the MCS of the data, obtaining the mapping relationship between the data MCS and the CQI code rate specifically includes:

Subtracting the code rate of the data from the code rate of the CQI can obtain a code rate offset value under a given SNR and modulation mode, and use the offset value as a mapping relationship between the data MCS and the CQI code rate. the

Compared with the prior art, embodiments of the present invention have the following advantages:

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

Description of drawings

Fig. 1 is the flowchart of the acquisition method of mapping relationship between data MCS and CQI code rate in the embodiment of the present invention;

Fig. 2 is the flowchart of the acquisition method of mapping relationship between data MCS and CQI code rate in another embodiment of the present invention;

Fig. 3 is the flowchart of the acquisition method of mapping relationship between data MCS and CQI code rate in another embodiment of the present invention;

Fig. 4 is the flowchart of the acquisition method of mapping relationship between data MCS and CQI code rate in another embodiment of the present invention;

Fig. 5 is the flowchart of the acquisition method of mapping relationship between data MCS and CQI code rate in another embodiment of the present invention;

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

7A to 7D are schematic structural diagrams of devices for obtaining the mapping relationship between the data MCS and the CQI code rate under different conditions in the embodiment of the present invention. the

Detailed ways

The embodiments of the present invention will be further described below in conjunction with the drawings and examples. the

When CQI and data are multiplexed on PUSCH, CQI and data use the same modulation method. At the same time, because data uses HARQ, but CQI does not use HARQ, and the BLER requirements of data and CQI are different. Therefore, the code rate of CQI and data There is an offset value between the code rates. In an embodiment of the present invention, a method for obtaining the mapping relationship between the data MCS and the CQI code rate is provided, and the mapping relationship between the data MCS and the CQI code rate is obtained by obtaining an offset value. As shown in Figure 1, the method includes:

Step s101, acquiring the code rate of the CQI according to the MCS of the data. the

Step s102, according to the code rate of the CQI and the MCS of the data, obtain the mapping relationship between the data MCS and the CQI code rate. the

After obtaining the mapping relationship between the data MCS and the CQI code rate by using the methods provided in the above embodiments, the base station can obtain the CQI code rate according to the data MCS and the above mapping relationship for use in UE uplink transmission. Therefore, the base station can configure different code rates for the data and CQI multiplexed on the PUSCH channel to meet respective transmission quality requirements. the

In the embodiment of the present invention, a method for acquiring the mapping relationship between data MCS and CQI code rate is provided, which is applied to the situation when CQI and data are multiplexed on PUSCH. As shown in Figure 2, the method includes the following steps:

Step s201. Quantize the entire SNR (dB) interval (from negative infinity to positive infinity) into several segments, and the number of segments is the number of data MCS on the PUSCH. the

Step s202, for a certain SNR value, according to the modulation mode of the data and the transmission quality requirements (such as BLER requirements), determine the code rate corresponding to the data. the

In step s203, the CQI adopts the same SNR and modulation method as the data, and the code rate of the CQI is determined according to the transmission quality requirements of the CQI (such as BLER requirements). Specifically, the corresponding relationship between the CQI transmission quality requirement and the CQI code rate can be established in advance, and then the CQI code rate can be determined according to the MCS of the data, the CQI transmission quality requirement and the above-mentioned corresponding relationship. the

Step s204, obtaining the mapping relationship between the data MCS and the CQI code rate. For example, subtracting the code rate of the CQI from the code rate of the data can obtain a code rate offset value under a given SNR and modulation mode, and use the offset value as a mapping relationship between the data MCS and the CQI code rate. the

Another embodiment of the present invention also provides a method for obtaining the mapping relationship between data MCS and CQI code rate, which is applied when CQI and data are multiplexed on PUSCH. the

The encoding method 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 (Reed-Muller) code of the base code (32, 13) is used; When the number of information bits is greater than 11 bits, a tail-biting convolutional code with a code rate of 1/3 is used, and rate matching is performed. In this embodiment, when establishing the mapping relationship between the data MCS and the CQI code rate, the influence of the number of CQI information bits is involved. the

Table 1 respectively lists the code rates required to achieve 1% BLER when the number of CQI information bits is 4, 7, and 11. The simulation conditions are: AWGN (Additive White Gaussian Noise, Additive White Gaussian Noise) channel, 1 transmitting antenna and 1 receiving antenna. the

Table 1 Code rate required for different CQI information bits to reach 1% BLDR

It can be seen from Table 1 that the code rate of CQI is closely related to the number of information bits. For a code rate of 0.182, the CQI of 11 information bits can work under the condition of SNR=1dB; while the CQI of 4 information bits can only work under the condition of SNR=2dB. the

If the CQIs of different numbers of information bits correspond to the same code rate, then either the CQIs of some numbers of information bits cannot meet the requirements of BLDR; transmission impact. the

When considering the impact of the number of CQI information bits on its code rate, in this embodiment, the method for obtaining the mapping relationship between the data MCS and the CQI code rate is shown in Figure 3, including the following steps:

Step s301. Quantize the entire SNR (dB) range (from negative infinity to positive infinity) into several segments, and the number of segments is the number of data MCS on the PUSCH. the

Step s302, for a certain SNR value, according to the modulation mode of the data and the transmission quality requirements (such as BLDR requirements), determine the code rate corresponding to the data. the

Step s303, the CQI adopts the same SNR and modulation method as the data, and according to the number of information bits of the CQI and the transmission quality requirements (such as BLDR requirements), determine the code rate corresponding to the CQI, that is, the code rate corresponding to the number of information bits of the different CQI different. Specifically, for each number of CQI information bits, the corresponding relationship between the CQI transmission quality requirements of each information bit number and the CQI code rate can be established in advance, and then the MCS of the data, the CQI transmission quality requirements, and the CQI information can be The number of bits and the above correspondence determine the coding rate of the CQI. the

Step s304, obtaining the mapping relationship between the data MCS and the CQI code rate. For example, under the condition that the SNR, modulation scheme and CQI information bit number are fixed, the code rate offset value under the given SNR and modulation scheme can be obtained by subtracting the code rate of the CQI code rate from the code rate of the data, and the offset value As a mapping relationship between the data MCS and the CQI code rate. the

In the method provided in this embodiment, the influence of the number of CQI information bits on its code rate is considered, so it can accurately reflect the mapping relationship between the data MCS and the CQI code rate. the

Another embodiment of the present invention also provides a method for obtaining the mapping relationship between data MCS and CQI code rate, which is applied when CQI and data are multiplexed on PUSCH. the

In the previous embodiment, a mapping relationship between the data MCS and the CQI code rate is established for each type of CQI information bit number, which can accurately reflect the mapping relationship between the data MCS and the CQI code rate. In this embodiment, CQIs with similar code rates but different numbers of information bits are grouped into one group, and the same representative CQI code rate is used for each group and can meet the transmission quality requirements (such as BLDR requirements) of all information bit number CQIs. Therefore, the implementation complexity can be further reduced while maintaining the performance. In this embodiment, the method for obtaining the mapping relationship between the data MCS and the CQI code rate is shown in Figure 4, including the following steps:

Step s401. Quantize the entire SNR (dB) range (from negative infinity to positive infinity) into several segments, and the number of segments is the number of data MCS on the PUSCH. the

Step s402, for a certain SNR value, according to the modulation mode of the data and the transmission quality requirements (such as BLER requirements), determine the code rate corresponding to the data. the

Step s403, CQI adopts the same SNR and modulation method as the data, and according to the transmission quality requirements of CQI (such as BLER requirements), the code rates are similar (such as the difference between code rates is less than 5% or other preset values) but the number of information bits is different The CQIs are grouped together. The CQIs in a group adopt the same representative CQI code rate, and can meet the transmission quality requirements of all information bit CQIs. Therefore, the code rates of representative CQIs corresponding to different groups of CQIs are different. Specifically, taking the code rate required to reach 1% BLER for different CQI information bits shown in Table 1 as an example, for the case of SNR=2, the number of CQI information bits can be set to 7 (the code rate in this case is 0.226) and the number of CQI information bits being 11 (the code rate in this case is 0.234) are grouped together, and 0.226 is used as the representative CQI code rate of this group. After the grouping is determined, the corresponding relationship between the transmission quality requirements of each group of CQI and the representative CQI code rate can be established in advance for each code rate representing the CQI. The grouping and the above correspondence determine the code rate of the CQI. the

Step s404, obtaining the mapping relationship between the data MCS and the CQI code rate. For example, under certain conditions of SNR, modulation mode and CQI grouping, subtracting the code rate of CQI from the code rate of the data can obtain the code rate offset value under the given SNR and modulation mode, and use the offset value as the data MCS and the mapping relationship between the CQI code rate. the

In the method provided by this embodiment, performance and implementation complexity are comprehensively considered, and the mapping relationship between the data MCS and the CQI code rate can be established according to the grouping of the CQI. the

Another embodiment of the present invention also provides a method for obtaining the mapping relationship between data MCS and CQI code rate, which is applied when CQI and data are multiplexed on PUSCH. the

In this embodiment, the method of grouping CQIs is still used. The difference from grouping CQIs according to code rates in the previous embodiment is that in this embodiment, CQIs are grouped according to the number of information bits. Specifically, according to the CQI transmission quality requirements (such as BLER requirements), the CQI information bits are grouped according to the number of CQI information bits, and the CQIs in a group use the same representative CQI code rate, and can meet the transmission quality requirements of all information bit number CQIs in the group. the

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

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

Step s502, for a certain SNR value, according to the modulation mode of the data and the transmission quality requirements (such as BLER requirements), determine the code rate corresponding to the data. the

In step s503, CQI adopts the same SNR and modulation mode as data. According to the CQI transmission quality requirements (such as BLER requirements), according to the CQI encoding method, the CQIs with information bits greater than 11 bits are classified into a large group, and the CQIs with information bits less than or equal to 11 bits are classified into a large group. Each large group is then evenly divided into several small groups (such as a large group of 4-11 bits, 3 small groups, 4, 5, 6 small groups, 7, 8, 9 small groups, 10, 11 small groups). The CQI in a group adopts the same representative CQI code rate, and can meet the transmission quality requirements of all information bit CQIs in the group. Therefore, code rates corresponding to CQIs of different groups are different. After the grouping is determined, the corresponding relationship between the transmission quality requirements of each group of CQI and the representative CQI code rate can be established in advance for each code rate representing the CQI. The grouping and the above correspondence determine the code rate of the CQI. the

Step s504, obtaining the mapping relationship between the data MCS and the CQI code rate. For example, under certain conditions of SNR, modulation mode and CQI grouping, subtracting the code rate of CQI from the code rate of the data can obtain the code rate offset value under the given SNR and modulation mode, and use the offset value as the data MCS and the mapping relationship between the CQI code rate. the

In the method provided by this embodiment, performance and implementation complexity are comprehensively considered, and the mapping relationship between the data MCS and the CQI code rate can be established according to the grouping of the CQI. the

It should be noted that, in the description of the above embodiments, the transmission quality requirement may be BLER, or a parameter characterizing the transmission quality requirement such as BER (Bit Error Rate, bit rate). the

By using the embodiment of the present invention, after obtaining the mapping relationship between the data MCS and the CQI code rate, the base station can obtain the CQI code rate according to the data MCS and the above mapping relationship for use in uplink transmission of the UE. Therefore, the base station can configure different code rates for the data and CQI multiplexed on the PUSCH channel to meet respective transmission quality requirements. the

An embodiment of the present invention also provides a device for obtaining the mapping relationship between the data MCS and the CQI code rate, as shown in Figure 6, including:

The code rate acquiring unit 10 is configured to acquire the code rate of the CQI according to the MCS of the data. the

The mapping relationship acquiring unit 20 is configured to acquire the 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 10 and the MCS of the data. the

In other embodiments, as shown in Figure 7A, the device may also include:

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

At this time, the code rate acquisition unit 10 specifically includes: a first code rate acquisition subunit 11, configured to obtain the MCS of the data, the transmission quality requirement of the CQI, and the correspondence established by the first correspondence establishment unit 30. CQI code rate. the

In addition to acquiring the code rate of the CQI according to the MCS of the data, the code rate acquiring unit 10 can also acquire the code rate of the CQI based on the number of information bits of the CQI in other embodiments. As shown in Figure 7B, the device may also include:

The second correspondence establishment unit 40 is configured to establish, for each number of information bits of CQI, a correspondence between the transmission quality requirement of each CQI of information bits and the CQI code rate. the

At this time, the code rate acquisition unit 10 specifically includes: a second code rate acquisition subunit 12, which is used 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. 40. The corresponding relationship is established to obtain the code rate of the CQI. the

In addition to obtaining the code rate of the CQI according to the MCS of the data, the code rate acquisition unit 10 can also be used in other embodiments according to the representative CQI code rate of the group where the CQI is located, as shown in FIG. 7C , the device may also include:

The first grouping unit 50 is configured to group CQIs with code rate differences smaller than a preset value but different numbers of information bits into one group according to CQI transmission quality requirements; each group adopts the same representative CQI code rate. the

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

At this time, the code rate acquisition unit 10 specifically includes: a third code rate acquisition subunit 13, which is used 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 establishment unit 60. Corresponding relationship, to obtain the code rate required by the CQI. the

In addition to obtaining the code rate of the CQI according to the MCS of the data, the code rate acquisition unit 10 can also be used in other embodiments according to the representative CQI code rate of the group where the CQI is located, as shown in FIG. 7D , the device may also include:

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

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

At this time, the code rate acquisition unit 10 specifically includes: a fourth code rate acquisition subunit 14, which is used to establish the MCS 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 establishment unit 80. Corresponding relationship, to obtain the code rate required by the CQI. the

After obtaining the mapping relationship between the data MCS and the CQI code rate by using the device provided by the embodiment of the present invention, the base station can obtain the CQI code rate according to the data MCS and the above mapping relationship for UE uplink transmission. Therefore, the base station can configure different code rates for the data and CQI multiplexed on the PUSCH channel to meet respective transmission quality requirements. the

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be realized by hardware, or by means of software plus a necessary general-purpose hardware platform. Based on this understanding, the technical solution of the present invention It can be embodied in the form of software products, which can be stored in a non-volatile storage medium (which can be CD-ROM, U disk, mobile hard disk, etc.), and include several instructions to make a computer device (which can be It is a personal computer, a server, or a network device, etc.) to execute the methods described in various embodiments of the present invention. the

The above disclosures are only a few specific embodiments of the present invention, however, the present invention is not limited thereto, and any changes conceivable by those skilled in the art shall fall within the protection scope of the present invention. the

Claims (9)

1. the acquisition methods of mapping relations between a data MCS and CQI code check is characterized in that, comprising:

Obtain the code check of channel quality indicator (CQI) according to the modulation coding mode MCS of data;

According to the code check of described CQI and the MCS of described data, obtain mapping relations between data MCS and CQI code check;

The code check that described modulation coding mode MCS according to data obtains channel quality indicator (CQI) specifically comprises:

Be multistage with whole signal to noise ratio snr interval quantization, hop count is the number of the upper data MCS of ascending physical signal shared channel PUSCH; SNR value in each section is according to modulation system and the code check corresponding to transmission quality requirements specified data of data; Channel quality indicator (CQI) adopts the signal to noise ratio snr identical with data and the modulation system of data, determines the code check of CQI according to the transmission quality requirements of channel quality indicator (CQI);

Described according to the code check of described CQI and the MCS of described data, obtain that mapping relations specifically comprise between data MCS and CQI code check:

The code check that the code check of data is deducted CQI can obtain the code check deviant under given SNR and the modulation system, with this deviant as the mapping relations between data MCS and the CQI code check.

2. the acquisition methods of mapping relations between data MCS and CQI code check as claimed in claim 1, it is characterized in that wherein said transmission quality requirements according to channel quality indicator (CQI) determines that the code check of CQI specifically comprises: set up the transmission quality requirements of described CQI and the corresponding relation of CQI code check;

The described code check that obtains CQI according to data MCS comprises: according to transmission quality requirements and the transmission quality requirements of described CQI and the corresponding relation of CQI code check of the MCS of described data, described CQI, obtain the code check of described CQI.

3. the acquisition methods of mapping relations between the described data MCS of claim 1 and CQI code check, it is characterized in that wherein said transmission quality requirements according to channel quality indicator (CQI) determines that the code check of CQI specifically comprises: the code check that obtains described CQI according to the information bit of CQI.

4. the acquisition methods of mapping relations between data MCS and CQI code check as claimed in claim 3, it is characterized in that, described method also comprises: for the information bit of each CQI, set up the transmission quality requirements of each information bit CQI and the corresponding relation of CQI code check;

The described code check that obtains CQI according to data MCS comprises: according to information bit and the transmission quality requirements of described each information bit CQI and the corresponding relation of CQI code check of the transmission quality requirements of the MCS of described data, described CQI, described CQI, obtain the code check of described CQI.

5. the acquisition methods of mapping relations between data MCS and CQI code check as claimed in claim 1, it is characterized in that wherein said transmission quality requirements according to channel quality indicator (CQI) determines that the code check of CQI specifically comprises: the code check that obtains CQI according to the representative CQI code check of CQI place grouping.

6. the acquisition methods of mapping relations between data MCS and CQI code check as claimed in claim 5, it is characterized in that, described method also comprises: according to the transmission quality requirements of CQI, difference between code check is classified as one group less than preset value, the different CQI of information bit, and the CQI in a group adopts identical representative CQI code check; Set up respectively the transmission quality requirements and the corresponding relation that represents the CQI code check of each group CQI;

The described code check that obtains CQI according to data MCS comprises: according to grouping and the described corresponding relation at the transmission quality requirements of the MCS of described data, described CQI, described CQI place, obtain the code check of described CQI.

7. the acquisition methods of mapping relations between data MCS and CQI code check as claimed in claim 5, it is characterized in that, described method also comprises: according to the transmission quality requirements of CQI, CQI is divided into groups according to information bit, CQI in one group adopts identical representative CQI code check, sets up respectively the transmission quality requirements and the corresponding relation that represents the CQI code check of each group CQI;

The described code check that obtains CQI according to data MCS comprises: according to grouping and the described corresponding relation at the transmission quality requirements of the MCS of described data, described CQI, described CQI place, obtain the code check of described CQI.

8. such as the acquisition methods of mapping relations between data MCS as described in the claim 2,4,6 or 7 and CQI code check, it is characterized in that described transmission quality requirements is block error rate BLER or error rate BER.

9. the deriving means of mapping relations between a data MCS and CQI code check is characterized in that, comprising:

The code check acquiring unit is for the code check that obtains CQI according to the MCS of data;

The mapping relations acquiring unit for the code check of the CQI that obtains according to described code check acquiring unit and the MCS of described data, obtains mapping relations between data MCS and CQI code check;

The first corresponding relation is set up the unit, is used for setting up the transmission quality requirements of described CQI and the corresponding relation of CQI code check;

Described code check acquiring unit comprises: the first code check obtains subelement, is used for setting up the corresponding relation that the unit is set up according to transmission quality requirements and described the first corresponding relation of the MCS of described data, described CQI, obtains the code check of described CQI;

The code check that described modulation coding mode MCS according to data obtains channel quality indicator (CQI) specifically comprises:

Be multistage with whole signal to noise ratio snr interval quantization, hop count is the number of the upper data MCS of ascending physical signal shared channel PUSCH; SNR value in each section is according to modulation system and the code check corresponding to transmission quality requirements specified data of data; Channel quality indicator (CQI) adopts the signal to noise ratio snr identical with data and the modulation system of data, determines the code check of CQI according to the transmission quality requirements of channel quality indicator (CQI);

Described according to the code check of described CQI and the MCS of described data, obtain that mapping relations specifically comprise between data MCS and CQI code check:

The code check that the code check of data is deducted CQI can obtain the code check deviant under given SNR and the modulation system, with this deviant as the mapping relations between data MCS and the CQI code check.

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