CN105634656A - Method for determining modulation and coding scheme of terminal, terminal and base station - Google Patents

Method for determining modulation and coding scheme of terminal, terminal and base station Download PDF

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Publication number
CN105634656A
CN105634656A CN201410593893.5A CN201410593893A CN105634656A CN 105634656 A CN105634656 A CN 105634656A CN 201410593893 A CN201410593893 A CN 201410593893A CN 105634656 A CN105634656 A CN 105634656A
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China
Prior art keywords
channel quality
coding mode
modulation coding
signal
noise ratio
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CN201410593893.5A
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Inventor
王飞
童辉
王启星
侯雪颖
金婧
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China Mobile Communications Group Co Ltd
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China Mobile Communications Group Co Ltd
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Priority to CN201410593893.5A priority Critical patent/CN105634656A/en
Priority to PCT/CN2015/092427 priority patent/WO2016066031A1/en
Publication of CN105634656A publication Critical patent/CN105634656A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received

Abstract

The invention provides a method for determining modulation and coding scheme (MCS) of a terminal, the terminal and a base station, wherein the method, the terminal and the base station relate to the field of wireless communication technology. The method comprises the steps of estimating a first channel quality of a first-time transmitted data block and a second channel quality which corresponds with the modulation and coding scheme (MCS) of the data block, and computing out a channel quality compensation value between the first channel quality and the second channel quality; and reporting the channel quality compensation value to the base station so that the base station determines the modulation and coding scheme (MCS) used by the terminal according to the channel quality compensation value. The method of the invention settles the problems of low convergence rate and incapability of being applied on discontinuous FTP service though suitability for a Fullbuffer service is realized in prior art.

Description

A kind of determine the method for end modification coded system MCS, terminal and base station
Technical field
The present invention relates to wireless communication technology field, particularly relate to a kind of determine the method for end modification coded system MCS, terminal and base station.
Background technology
In existing standard, TD-LTE (TimeDivisionLongTermEvolution, time-division Long Term Evolution) when system uses beamforming transmission, UE (UserEquipment, subscriber equipment) calculate CQI (Channelqualityindicator according to transmission diversity transmitdiversity mode, channel quality indicates) and report base station eNB, eNB is according to uplink SRS (SoundingReferenceSignal, Sounding Reference Signal) and up-downgoing channel reciprocity calculate UE wave beam formed matrix, and estimate the UE SINR (SignaltoInterferenceplusNoiseRatio that can support in conjunction with CQI, signal to noise ratio), for the MCS (ModulationandCodingScheme that UE distribution is suitable, modulation and coding strategy). owing to the actual data transfer between eNB and UE has beam forming gain, and the CQI that UE reports is based on transmitdiversity, do not account for beam forming gain, both channel quality is also inconsistent, therefore eNB cannot directly according to the UE CQI reported be UE distribute MCS, in addition it is also necessary to determine MCS after being adjusted according to the channel of UE and wave beam formed matrix etc. it is inaccurate that the channel quality of this TxD (transmitdiversity, transmission diversity) CQI and the transmission of actual beam figuration does not mate the MCS causing eNB to be UE distribution, adds eNB and determines the complexity of MCS.
Solution conventional at present is outer loop link adaptive technique OLLA, OLLA, for compensating the performance difference between TxDCQI and beamforming transmission, carries out link circuit self-adapting by allowing the transmission block bit error rate transmitted for the first time reach a certain index (such as 10%).
This chain circuit self-adaptive method belongs to a kind of slow-action adjusting method, and convergence rate is slow, and performance during for full buffer memory Fullbuffer business is it is also possible that due to the discontinuity of business when being used for file transmission ftp business, the effect of OLLA is only small.
Summary of the invention
It is an object of the invention to provide and a kind of determine the method for end modification coded system MCS, terminal and base station, fast convergence rate, the modulation coding mode that next time is transmitted by the channel quality according to terminal to report channel quality and actual transmissions is adjusted, and has the better suitability.
For reaching above-mentioned purpose, embodiments of the invention provide a kind of method determining end modification coded system MCS, including:
Terminal estimation receives the first channel quality of the data block of first time transmission and the second channel quality corresponding for modulation coding mode MCS of described data block, and calculates the channel quality offset between described first channel quality and described second channel quality;
Described channel quality offset is reported base station, so that base station is according to described channel quality offset, it is determined that the modulation coding mode MCS that terminal uses.
Wherein, the estimation of described terminal receives the first channel quality of the data block of first time transmission and the second channel quality corresponding for modulation coding mode MCS of described data block, and the step calculating the channel quality offset between described first channel quality and described second channel quality includes:
When obtaining the data block of first time transmission, estimate, according to the power of test of self, the second channel quality that the modulation coding mode obtaining the first channel quality and described data block is corresponding, and obtain described first channel quality and the difference of described second channel quality;
Using described difference as described channel quality offset.
Wherein, during the data block that described acquisition first time transmits, power of test according to self estimates the second channel quality that the modulation coding mode obtaining the first channel quality and described data block is corresponding, and the step obtaining the difference of described first channel quality and described second channel quality includes:
Power of test estimation according to self obtains the first signal to noise ratio of the data block of first time transmission and the first modulation coding mode of described data block use, and the modulation coding mode-signal to noise ratio conversion table by presetting, determine second signal to noise ratio corresponding with described first modulation coding mode, obtain described first signal to noise ratio and the difference of described second signal to noise ratio, using the described difference difference as described first channel quality Yu described second channel quality; Or
Power of test estimation according to self obtains the first signal to noise ratio of multiple layers of the data block of first time transmission and multiple layers of the first modulation coding mode used of described data block, and the modulation coding mode-signal to noise ratio conversion table by presetting, determine second signal to noise ratio corresponding with described first modulation coding mode, obtain multiple differences of described first signal to noise ratio and described second signal to noise ratio one to one, using the plurality of difference difference as described first channel quality Yu described second channel quality; Or
Power of test estimation according to self obtains the first signal to noise ratio of multiple layers of the data block of first time transmission and multiple layers of the first modulation coding mode used of described data block, and the modulation coding mode-signal to noise ratio conversion table by presetting, determine second signal to noise ratio corresponding with described first modulation coding mode, obtain multiple differences of described first signal to noise ratio and described second signal to noise ratio one to one, using the meansigma methods of the plurality of difference difference as described first channel quality Yu described second channel quality; Or
Power of test estimation according to self obtains the first signal to noise ratio of the data block of first time transmission and the first modulation coding mode of described data block use, and the modulation coding mode-signal to noise ratio conversion table by presetting, determine second modulation coding mode corresponding with described first signal to noise ratio, obtain described second modulation coding mode and the difference of described first modulation coding mode, using the described difference difference as described first channel quality Yu described second channel quality;
Power of test estimation according to self obtains the first signal to noise ratio of the data block of first time transmission and the first modulation coding mode of described data block use, and the channel quality instruction-signal to noise ratio conversion table by presetting, determine that first corresponding with described first signal to noise ratio adjusts channel quality instruction, by default channel quality instruction-modulation coding mode conversion table, determine the second channel quality instruction corresponding with described first modulation coding mode, obtain the described first difference adjusting channel quality instruction and the instruction of described second channel quality, using the described difference difference as described first channel quality Yu described second channel quality.
For reaching above-mentioned purpose, embodiments of the invention additionally provide a kind of method determining end modification coded system MCS, including:
Obtain the channel quality offset between the second channel quality that the modulation coding mode of first channel quality of data block of the first time transmission of terminal to report and described data block is corresponding;
According to described channel quality offset, it is determined that the modulation coding mode MCS that terminal uses.
Wherein, described according to described channel quality offset, it is determined that the step of the modulation coding mode MCS that terminal uses includes:
The modulation coding mode that terminal uses, when for terminal distribution modulation coding mode, is determined, according to the channel quality offset reported for the previous period of terminal, in base station.
Wherein, the described channel quality offset reported for the previous period according to terminal determines that the step of the modulation coding mode that terminal uses includes:
The first channel quality evaluation the 3rd signal to noise ratio according to terminal to report, obtain terminal up-to-date channel quality offset reported in Preset Time before, when described channel quality offset is signal to noise ratio, it is adjusted obtaining the 4th signal to noise ratio to described 3rd signal to noise ratio according to described channel quality offset, by default modulation coding mode-signal to noise ratio conversion table, it is determined that the modulation coding mode corresponding with described 4th signal to noise ratio; Or
The first channel quality evaluation the 3rd signal to noise ratio according to terminal to report, the channel quality offset of the terminal to report in acquisition preset time period, described channel quality offset is smoothed the channel quality offset obtaining optimizing, when the channel quality offset of described optimization is signal to noise ratio, described 3rd signal to noise ratio is adjusted obtaining the 4th signal to noise ratio by the channel quality offset according to described optimization, by default modulation coding mode-signal to noise ratio conversion table, it is determined that the modulation coding mode corresponding with described 4th signal to noise ratio; Or
The first channel quality evaluation the 3rd signal to noise ratio according to terminal to report, the channel quality offset of the terminal to report in acquisition preset time period, described channel quality offset is smoothed the channel quality offset obtaining optimizing, when the channel quality offset of described optimization is modulation coding mode, by default modulation coding mode-signal to noise ratio conversion table, determine threeth modulation coding mode corresponding with described 3rd signal to noise ratio, be adjusted obtaining the 4th modulation coding mode to described 3rd modulation coding mode according to the channel quality offset of described optimization; Or
The first channel quality evaluation the 3rd signal to noise ratio according to terminal to report, obtain terminal up-to-date channel quality offset reported in Preset Time before, when described channel quality offset is modulation coding mode, by default modulation coding mode-signal to noise ratio conversion table, determine threeth modulation coding mode corresponding with described 3rd signal to noise ratio, be adjusted obtaining the 4th modulation coding mode to described 3rd modulation coding mode according to described channel quality offset.
For reaching above-mentioned purpose, embodiments of the invention additionally provide a kind of terminal, including:
Processing module, receive the first channel quality of the data block of first time transmission and the second channel quality corresponding for modulation coding mode MCS of described data block for terminal estimation, and calculate the channel quality offset between described first channel quality and described second channel quality;
Reporting module, for reporting base station by described channel quality offset, so that base station is according to described channel quality offset, it is determined that the modulation coding mode MCS that terminal uses.
Wherein, described processing module includes:
Process submodule, during for obtaining the data block transmitted for the first time, power of test according to self estimates the second channel quality that the modulation coding mode obtaining the first channel quality and described data block is corresponding, and obtains described first channel quality and the difference of described second channel quality;
First submodule, for using described difference as described channel quality offset.
For reaching above-mentioned purpose, embodiments of the invention additionally provide a kind of base station, including:
Channel quality offset between the second channel quality that acquisition module, the first channel quality of the data block that the first time for obtaining terminal to report transmits and the modulation coding mode of described data block are corresponding;
Determine module, for according to described channel quality offset, it is determined that the modulation coding mode MCS that terminal uses.
Wherein, described determine module specifically for base station when for terminal distribution modulation coding mode, determine, according to the channel quality offset reported for the previous period of terminal, the modulation coding mode that terminal uses.
Having the beneficial effect that of the technique scheme of the present invention:
The method of the determination end modification coded system MCS of the embodiment of the present invention, first channel quality is based on transmitdiversity, do not account for beam forming gain, when terminal obtains the first channel quality of the data block of first time transmission, obtain the second channel quality that the modulation coding mode of this data block is corresponding simultaneously, and calculate the channel quality offset between the first channel quality and second channel quality, then base station is reported, so that the modulation coding mode that terminal uses can be determined, according to this offset, in base station. The suitable adjustment to transmission next time is achieved by channel quality offset, determine the modulation coding mode being more suitable for present data transmission, compared to the existing scheme being fixed adjustment, there is the higher suitability, not only it is suitable for successional Fullbuffer business, and is also suitable the ftp business of noncontinuity.
Accompanying drawing explanation
Fig. 1 represents the steps flow chart schematic diagram one of the method for the determination end modification coded system MCS of the embodiment of the present invention;
Fig. 2 represents the application flow schematic diagram of the method for the determination end modification coded system MCS of the embodiment of the present invention;
Fig. 3 represents the steps flow chart schematic diagram two of the method for the determination end modification coded system MCS of the embodiment of the present invention;
Fig. 4 represents the structural representation of the terminal of the embodiment of the present invention;
Fig. 5 represents the structural representation of the base station of the embodiment of the present invention.
Detailed description of the invention
For making the technical problem to be solved in the present invention, technical scheme and advantage clearly, it is described in detail below in conjunction with the accompanying drawings and the specific embodiments.
The present invention is directed to the existing method outer loop link adaptive technique adjusted at a slow speed, by the channel quality of terminal to report and the channel quality of actual transmissions are mated, rate of convergence is slow, although Fullbuffer business can be used for, but it is not applied for the problems such as discontinuity ftp business, a kind of method determining end modification coded system MCS, fast convergence rate are provided, there is the better suitability.
As it is shown in figure 1, a kind of method determining end modification coded system MCS of the embodiment of the present invention, including:
Step 11, terminal estimation receives the first channel quality of the data block of first time transmission and the second channel quality corresponding for modulation coding mode MCS of described data block, and calculates the channel quality offset between described first channel quality and described second channel quality; ;
Step 12, reports base station by described channel quality offset, so that base station is according to described channel quality offset, it is determined that the modulation coding mode MCS that terminal uses.
In embodiments of the present invention, first channel quality is based on transmitdiversity, do not account for beam forming gain, when terminal obtains the first channel quality of the data block of first time transmission, obtain the second channel quality that the modulation coding mode of this data block is corresponding simultaneously, and calculate the channel quality offset between the first channel quality and second channel quality, then report base station, so that the modulation coding mode that terminal uses can be determined, according to this offset, in base station. The suitable adjustment to transmission next time is achieved by channel quality offset, determine the modulation coding mode being more suitable for present data transmission, compared to the existing scheme being fixed adjustment, there is the higher suitability, not only it is suitable for successional Fullbuffer business, and is also suitable the ftp business of noncontinuity.
Wherein, step 11 includes:
Step 111, when obtaining the data block of first time transmission, power of test according to self estimates the second channel quality that the modulation coding mode obtaining the first channel quality and described data block is corresponding, and obtains described first channel quality and the difference of described second channel quality;
Step 112, using described difference as described channel quality offset.
When terminal receives the data block of first time transmission, it is possible to estimate according to the power of test of self and obtain the first channel quality. First channel quality contains the relevant parameter of channel quality, such as channel quality instruction, signal to noise ratio etc. For signal to noise ratio, all signals of the data block that terminal receives, wherein can analyze useful signal and interference signal, the analysis mode of different terminals is different, but as long as obtaining wherein, both just can obtain signal to noise ratio. Second channel quality is corresponding with the modulation coding mode of this data block, is also the relevant parameter of channel quality, it is possible to be modulation coding mode, channel quality instruction or signal to noise ratio etc. Get the difference of the first channel quality and second channel quality, then this difference is reported base station as channel quality offset, so that it may make base station according to this channel quality offset, it is determined that the modulation coding mode MCS that terminal uses.
Will be appreciated that, the related parameter channel quality of channel quality indicates, is there is mutually corresponding relation between signal to noise ratio and modulation coding mode, as when known signal to noise ratio, modulation coding mode and the channel quality instruction of correspondence can be mapped to by signal to noise ratio, therefore, on the basis of the above embodiment of the present invention, step 111 includes:
Step 1111a, power of test estimation according to self obtains the first signal to noise ratio of the data block of first time transmission and the first modulation coding mode of described data block use, and the modulation coding mode-signal to noise ratio conversion table by presetting, determine second signal to noise ratio corresponding with described first modulation coding mode, obtain described first signal to noise ratio and the difference of described second signal to noise ratio, using the described difference difference as described first channel quality Yu described second channel quality; Or
Step 1111b, power of test estimation according to self obtains the first signal to noise ratio of multiple layers of the data block of first time transmission and multiple layers of the first modulation coding mode used of described data block, and the modulation coding mode-signal to noise ratio conversion table by presetting, determine second signal to noise ratio corresponding with described first modulation coding mode, obtain multiple differences of described first signal to noise ratio and described second signal to noise ratio one to one, using the plurality of difference difference as described first channel quality Yu described second channel quality; Or
Step 1111c, power of test estimation according to self obtains the first signal to noise ratio of multiple layers of the data block of first time transmission and multiple layers of the first modulation coding mode used of described data block, and the modulation coding mode-signal to noise ratio conversion table by presetting, determine second signal to noise ratio corresponding with described first modulation coding mode, obtain multiple differences of described first signal to noise ratio and described second signal to noise ratio one to one, using the meansigma methods of the plurality of difference difference as described first channel quality Yu described second channel quality; Or
Step 1111d, power of test estimation according to self obtains the first signal to noise ratio of the data block of first time transmission and the first modulation coding mode of described data block use, and the modulation coding mode-signal to noise ratio conversion table by presetting, determine second modulation coding mode corresponding with described first signal to noise ratio, obtain described second modulation coding mode and the difference of described first modulation coding mode, using the described difference difference as described first channel quality Yu described second channel quality;
Step 1111e, power of test estimation according to self obtains the first signal to noise ratio of the data block of first time transmission and the first modulation coding mode of described data block use, and the channel quality instruction-signal to noise ratio conversion table by presetting, determine that first corresponding with described first signal to noise ratio adjusts channel quality instruction, by default channel quality instruction-modulation coding mode conversion table, determine the second channel quality instruction corresponding with described first modulation coding mode, obtain the described first difference adjusting channel quality instruction and the instruction of described second channel quality, using the described difference difference as described first channel quality Yu described second channel quality.
In step 1111a, when terminal receives the data block of first time transmission, the power of test first passing through self estimates the first signal to noise ratio SINR_Rx of this data block, simultaneously by detecting the first modulation coding mode MCS_Tx that also can obtain the use of this data block, the second signal to noise ratio SINR_Tx of correspondence it is mapped to again through MCS_Tx, i.e. modulation coding mode-signal to noise ratio conversion table by presetting, determine the SINR_Tx corresponding with MCS_Tx, this SINR_Tx is exactly the signal to noise ratio in actual transmissions process, there are differences with the SINR_Rx of terminal estimation, obtain the difference of SINR_Rx and SINR_Tx, can as the difference of the first channel quality Yu second channel quality, namely channel quality offset, now channel quality offset is the form SINR_OFFSET with signal to noise ratio, this SINR_OFFSET just can report base station after doing quantification treatment.
In step 1111b, data block is likely to corresponding multiple layers of layer, when terminal receives the data block of first time transmission, the power of test first passing through self estimates the first signal to noise ratio SINR_Rx of multiple layerd when this time transmitting, simultaneously by detecting the multiple layer that also can obtain this data block the first modulation coding mode MCS_Tx used, the second signal to noise ratio SINR_Tx of correspondence it is mapped to again through MCS_Tx, i.e. modulation coding mode-signal to noise ratio conversion table by presetting, determine the SINR_Tx corresponding with MCS_Tx, obtain the SINR_Tx of each layer, this SINR_Tx is exactly the signal to noise ratio in actual transmissions process, there are differences with the SINR_Rx of terminal estimation. then, obtain the difference of every layer of SINR_Rx and SINR_Tx one to one, obtain multiple can as the difference of the first channel quality Yu second channel quality, namely channel quality offset, now channel quality offset is also the form SINR_OFFSET with signal to noise ratio, this SINR_OFFSET just can report base station after doing quantification treatment, base station desirable multiple SINR_OFFSET meansigma methodss when subsequent treatment complete subsequent treatment.
In step 1111c, process with step 1111b is roughly the same, simply obtain multiple can as the difference of the first channel quality Yu second channel quality, namely with after the channel quality offset SINR_OFFSET of the form of signal to noise ratio, multiple SINR_OFFSET are carried out pretreatment average obtain one preferably SINR_OFFSET be reported to base station after quantifying.
In step 1111d, similar step 1111a, when terminal receives the data block of first time transmission, the power of test first passing through self estimates the first signal to noise ratio SINR_Rx of this data block, simultaneously by detecting the first modulation coding mode MCS_Tx that also can obtain the use of this data block, then step 1111a it is different from, it is the second modulation coding mode MCS_Rx being mapped to correspondence by SINR_Rx, i.e. modulation coding mode-signal to noise ratio conversion table by presetting, determine the MCS_Rx corresponding with SINR_Rx, this MCS_Rx is exactly the modulation coding mode according to data block estimation, there are differences with the MCS_Tx of terminal actual transmissions, obtain the difference of MCS_Rx and MCS_Tx, can as the difference of the first channel quality Yu second channel quality, namely channel quality offset, now channel quality offset is the form MCS_OFFSET with modulation coding mode, this MCS_OFFSET just can report base station.
And in step 1111e, when terminal receives the data block of first time transmission, the power of test first passing through self estimates the first signal to noise ratio SINR_Rx of this data block, simultaneously by detecting the first modulation coding mode MCS_Tx that also can obtain the use of this data block, then pass through SINR_Rx and be mapped to the first channel quality indicator (CQI) _ Rx of correspondence, the i.e. channel quality instruction-signal to noise ratio conversion table by presetting, determine the CQI_Rx corresponding with SINR_Rx, and the channel quality instruction-modulation coding mode conversion table by presetting, determine the second channel quality indicator (CQI) _ Tx corresponding with MCS_Tx, wherein CQI_Rx is exactly the channel quality instruction according to data block estimation, there are differences with the CQI_Tx of terminal actual transmissions, obtain the difference of CQI_Rx and CQI_Tx, can as the difference of the first channel quality Yu second channel quality, namely channel quality offset, now channel quality offset is with the form A QI_OFFSET of channel quality instruction, this CQI_OFFSET just can report base station.
Certainly; as the corresponding multiple layer of data block; may be used without the mode of step 1111d or step 1111e to each layer process; and owing to channel quality indicates, there is mutually corresponding relation between signal to noise ratio and modulation coding mode; except above-mentioned mode; other are capable of obtaining the difference of the first channel quality and second channel quality in the embodiment of the present invention, and the mode of channel quality offset also should be regarded as protection scope of the present invention, numerous to list herein.
In an embodiment of the present invention, the modulation coding mode that terminal uses, when for terminal distribution modulation coding mode, is determined, according to the channel quality offset reported for the previous period of terminal, in base station.
Wherein, step 21, determine, according to the channel quality offset reported for the previous period of terminal, the modulation coding mode that terminal uses, including:
Step 211a, the first channel quality evaluation the 3rd signal to noise ratio according to terminal to report, obtain terminal up-to-date channel quality offset reported in Preset Time before, when described channel quality offset is signal to noise ratio, it is adjusted obtaining the 4th signal to noise ratio to described 3rd signal to noise ratio according to described channel quality offset, by default modulation coding mode-signal to noise ratio conversion table, it is determined that the modulation coding mode corresponding with described 4th signal to noise ratio; Or
Step 211b, the first channel quality evaluation the 3rd signal to noise ratio according to terminal to report, the channel quality offset of the terminal to report in acquisition preset time period, described channel quality offset is smoothed the channel quality offset obtaining optimizing, when the channel quality offset of described optimization is signal to noise ratio, described 3rd signal to noise ratio is adjusted obtaining the 4th signal to noise ratio by the channel quality offset according to described optimization, by default modulation coding mode-signal to noise ratio conversion table, it is determined that the modulation coding mode corresponding with described 4th signal to noise ratio; Or
Step 211c, the first channel quality evaluation the 3rd signal to noise ratio according to terminal to report, the channel quality offset of the terminal to report in acquisition preset time period, described channel quality offset is smoothed the channel quality offset obtaining optimizing, when the channel quality offset of described optimization is modulation coding mode, by default modulation coding mode-signal to noise ratio conversion table, determine threeth modulation coding mode corresponding with described 3rd signal to noise ratio, described 3rd modulation coding mode is adjusted obtaining the 4th modulation coding mode by the channel quality offset according to described optimization, or
Step 211d, the first channel quality evaluation the 3rd signal to noise ratio according to terminal to report, obtain terminal up-to-date channel quality offset reported in Preset Time before, when described channel quality offset is modulation coding mode, by default modulation coding mode-signal to noise ratio conversion table, determine threeth modulation coding mode corresponding with described 3rd signal to noise ratio, be adjusted obtaining the 4th modulation coding mode to described 3rd modulation coding mode according to described channel quality offset.
By foregoing it can be seen that channel quality offset can be signal to noise ratio or modulation coding mode or channel quality instruction. In step 211a, base station can according to the first channel quality evaluation the 3rd signal to noise ratio SINR_Old of terminal to report, wherein, the first channel quality includes the CQI based on transmission diversity TxD, can use base station side information and include wave beam formed matrix and/or channel etc. in estimation. Meanwhile, terminal up-to-date channel quality offset reported in Preset Time before is obtained. Now, channel quality offset is the form SINR_OFFSET of signal to noise ratio, according to this SINR_OFFSET, SINR_Old is adjusted the 4th signal to noise ratio SINR_New after being adjusted, such as SINR_New=SINR_Old+SINR_OFFSET, modulation coding mode-signal to noise ratio conversion table by presetting afterwards, it is determined that the modulation coding mode corresponding with SINR_New, distributes to terminal by this modulation coding mode, in new transmission, new modulation coding mode is used to improve data transmission quality.
In step 211b, similar step 211a, base station can according to the first channel quality evaluation the 3rd signal to noise ratio SINR_Old of terminal to report, wherein, first channel quality includes the CQI based on transmission diversity TxD, can use base station side information and include wave beam formed matrix and/or channel etc. in estimation. The difference is that, all channel quality offsets that terminal reports in Preset Time before can be obtained, these channel quality offsets are smoothed the channel quality offset obtaining optimizing. Now, the channel quality offset optimized is the form Ave_SINR_OFFSET of signal to noise ratio, according to this Ave_SINR_OFFSET, SINR_Old is adjusted the 4th signal to noise ratio SINR_New after being adjusted, such as SINR_New=SINR_Old+Ave_SINR_OFFSET, modulation coding mode-signal to noise ratio conversion table by presetting afterwards, determine the modulation coding mode corresponding with SINR_New, this modulation coding mode is distributed to terminal, in new transmission, new modulation coding mode is used to improve data transmission quality.
In step 211c, same base station can according to the first channel quality evaluation the 3rd signal to noise ratio SINR_Old of terminal to report, wherein, the first channel quality includes the CQI based on transmission diversity TxD, can use base station side information and include wave beam formed matrix and/or channel etc. in estimation. then can obtain all channel quality offsets that terminal reports in Preset Time before, these channel quality offsets are smoothed the channel quality offset obtaining optimizing. now, the channel quality offset optimized is the form Ave_MCS_OFFSET of modulation coding mode, it is accomplished by first SINR_Old being mapped as modulation coding mode, i.e. modulation coding mode-signal to noise ratio conversion table by presetting, determine the threeth modulation coding mode MCS_Old corresponding with SINR_Old, then according to this Ave_MCS_OFFSET, MCS_Old is adjusted the 4th modulation coding mode MCS_New after being adjusted, such as MCS_New=MCS_Old+Ave_MCS_OFFSET, afterwards the modulation coding mode of this MCS_New is distributed to terminal, in new transmission, new modulation coding mode is used to improve data transmission quality.
In step 211d, same, base station can according to the first channel quality evaluation the 3rd signal to noise ratio SINR_Old of terminal to report, wherein, first channel quality includes the CQI based on transmission diversity TxD, can use base station side information and include wave beam formed matrix and/or channel etc. in estimation. meanwhile, terminal up-to-date channel quality offset reported in Preset Time before is obtained. now, channel quality offset is the form MCS_OFFSET of modulation coding mode, it is accomplished by first SINR_Old being mapped as modulation coding mode, i.e. modulation coding mode-signal to noise ratio conversion table by presetting, determine the threeth modulation coding mode MCS_Old corresponding with SINR_Old, according to this MCS_OFFSET, MCS_Old is adjusted the 4th modulation coding mode MCS_New after being adjusted, such as MCS_New=MCS_Old+MCS_OFFSET, modulation coding mode-signal to noise ratio conversion table by presetting afterwards, determine the modulation coding mode of this MCS_New, and distribute to terminal, in new transmission, new modulation coding mode is used to improve data transmission quality.
Owing to channel quality indicates, there is mutually corresponding relation between signal to noise ratio and modulation coding mode; in above-mentioned steps, channel quality offset can be the form of channel quality instruction; by corresponding conversion; mapping obtains signal to noise ratio or modulation coding mode and carries out respective handling further according to other modes that the principle of above-mentioned steps is identical; determine that the modulation demodulation system distributing to terminal also should be regarded as protection scope of the present invention, numerous to list herein.
In sum, as shown in Figure 2, terminal performs S201, when receiving the data block of first time transmission, estimates the channel quality offset between the second channel quality that the modulation coding mode obtaining the first channel quality and this data block is corresponding according to the power of test of self. First channel quality contains the relevant parameter of channel quality, such as channel quality instruction, signal to noise ratio etc. Second channel quality pack, containing the relevant parameter identical with the first channel quality, gets the difference of the first channel quality and second channel quality, then using this difference as channel quality offset, S202, channel quality offset is reported base station. So, base station can such as S203, according to channel quality offset, it is determined that terminal use modulation coding mode MCS and distribute to terminal. Wherein, channel quality offset can pass through channel quality instruction, signal to noise ratio or modulation demodulation system realization. So, the suitable adjustment to transmission next time is achieved by channel quality offset, determine the modulation coding mode being more suitable for present data transmission, compared to the existing scheme being fixed adjustment, there is the higher suitability, not only applicable successional Fullbuffer business, and it is also suitable the ftp business of noncontinuity, improve handling capacity.
As it is shown on figure 3, embodiments of the invention additionally provide a kind of method determining end modification coded system MCS, including:
Step 31, it is thus achieved that first channel quality of data block of the first time transmission of terminal to report and the channel quality offset between second channel quality corresponding to the modulation coding mode of described data block;
Step 32, according to described channel quality offset, it is determined that the modulation coding mode MCS that terminal uses.
Wherein, when described channel quality offset is the data block that terminal obtains first time transmission, power of test according to self estimates the second channel quality that the modulation coding mode obtaining the first channel quality and described data block is corresponding, obtain described first channel quality and the difference of described second channel quality, and using described difference as described channel quality offset.
Wherein, step 41, when terminal obtains the data block of first time transmission, power of test according to self estimates the second channel quality that the modulation coding mode obtaining the first channel quality and described data block is corresponding, and the step of the difference obtaining described first channel quality and described second channel quality includes:
Step 411a, power of test estimation according to self obtains the first signal to noise ratio of the data block of first time transmission and the first modulation coding mode of described data block use, and the modulation coding mode-signal to noise ratio conversion table by presetting, determine second signal to noise ratio corresponding with described first modulation coding mode, obtain described first signal to noise ratio and the difference of described second signal to noise ratio, using the described difference difference as described first channel quality Yu described second channel quality; Or
Step 411b, power of test estimation according to self obtains the first signal to noise ratio of multiple layers of the data block of first time transmission and multiple layers of the first modulation coding mode used of described data block, and the modulation coding mode-signal to noise ratio conversion table by presetting, determine second signal to noise ratio corresponding with described first modulation coding mode, obtain multiple differences of described first signal to noise ratio and described second signal to noise ratio one to one, using the plurality of difference difference as described first channel quality Yu described second channel quality; Or
Step 411c, power of test estimation according to self obtains multiple layers of the first modulation coding mode used of the first signal to noise ratio transmitting multiple layers that are data block for the first time and described data block, and the modulation coding mode-signal to noise ratio conversion table by presetting, determine second signal to noise ratio corresponding with described first modulation coding mode, obtain multiple differences of described first signal to noise ratio and described second signal to noise ratio one to one, using the meansigma methods of the plurality of difference difference as described first channel quality Yu described second channel quality; Or
Step 411d, power of test estimation according to self obtains the first signal to noise ratio of the data block of first time transmission and the first modulation coding mode of described data block use, and the modulation coding mode-signal to noise ratio conversion table by presetting, determine second modulation coding mode corresponding with described first signal to noise ratio, obtain described second modulation coding mode and the difference of described first modulation coding mode, using the described difference difference as described first channel quality Yu described second channel quality;
Step 411e, power of test estimation according to self obtains the first signal to noise ratio of the data block of first time transmission and the first modulation coding mode of described data block use, and the channel quality instruction-signal to noise ratio conversion table by presetting, determine that first corresponding with described first signal to noise ratio adjusts channel quality instruction, by default channel quality instruction-modulation coding mode conversion table, determine the second channel quality instruction corresponding with described first modulation coding mode, obtain the described first difference adjusting channel quality instruction and the instruction of described second channel quality, using the described difference difference as described first channel quality Yu described second channel quality.
Wherein, step 32 includes:
Step 32 ', the modulation coding mode that terminal uses, when for terminal distribution modulation coding mode, is determined, according to the channel quality offset reported for the previous period of terminal, in base station.
Wherein, step 32 ', including:
Step 32 ' 1a, the first channel quality evaluation the 3rd signal to noise ratio according to terminal to report, obtain terminal up-to-date channel quality offset reported in Preset Time before, when described channel quality offset is signal to noise ratio, it is adjusted obtaining the 4th signal to noise ratio to described 3rd signal to noise ratio according to described channel quality offset, by default modulation coding mode-signal to noise ratio conversion table, it is determined that the modulation coding mode corresponding with described 4th signal to noise ratio; Or
Step 32 ' 1b, the first channel quality evaluation the 3rd signal to noise ratio according to terminal to report, the channel quality offset of the terminal to report in acquisition preset time period, described channel quality offset is smoothed the channel quality offset obtaining optimizing, when the channel quality offset of described optimization is signal to noise ratio, described 3rd signal to noise ratio is adjusted obtaining the 4th signal to noise ratio by the channel quality offset according to described optimization, by default modulation coding mode-signal to noise ratio conversion table, it is determined that the modulation coding mode corresponding with described 4th signal to noise ratio; Or
Step 32 ' 1c, the first channel quality evaluation the 3rd signal to noise ratio according to terminal to report, the channel quality offset of the terminal to report in acquisition preset time period, described channel quality offset is smoothed the channel quality offset obtaining optimizing, when the channel quality offset of described optimization is modulation coding mode, by default modulation coding mode-signal to noise ratio conversion table, determine threeth modulation coding mode corresponding with described 3rd signal to noise ratio, described 3rd modulation coding mode is adjusted obtaining the 4th modulation coding mode by the channel quality offset according to described optimization, or
Step 32 ' 1d, the first channel quality evaluation the 3rd signal to noise ratio according to terminal to report, obtain terminal up-to-date channel quality offset reported in Preset Time before, when described channel quality offset is modulation coding mode, by default modulation coding mode-signal to noise ratio conversion table, determine threeth modulation coding mode corresponding with described 3rd signal to noise ratio, be adjusted obtaining the 4th modulation coding mode to described 3rd modulation coding mode according to described channel quality offset.
In sum, the method of the determination end modification coded system MCS of embodiments of the invention, after base station obtains the channel quality offset between the second channel quality that the modulation coding mode of first channel quality of data block of the first time transmission of terminal to report and this data block is corresponding, according to channel quality offset, it is determined that the modulation coding mode MCS that terminal uses. The suitable adjustment to transmission next time is achieved by channel quality offset, determine the modulation coding mode being more suitable for present data transmission, compared to the existing scheme being fixed adjustment, there is the higher suitability, not only it is suitable for successional Fullbuffer business, and it is also suitable the ftp business of noncontinuity, improve handling capacity.
It should be noted that the method is to cooperate with the method that the above-mentioned method determining end modification coded system MCS produces a desired effect, the implementation of the above-mentioned method determining end modification coded system MCS is applicable to the method, also can reach identical technique effect.
As shown in Figure 4, embodiments of the invention additionally provide a kind of terminal, including:
Processing module 10, receive the first channel quality of the data block of first time transmission and the second channel quality corresponding for modulation coding mode MCS of described data block for terminal estimation, and calculate the channel quality offset between described first channel quality and described second channel quality;
Reporting module 20, for reporting base station by described channel quality offset, so that base station is according to described channel quality offset, it is determined that the modulation coding mode MCS that terminal uses.
Wherein, described processing module includes:
Process submodule, during for obtaining the data block transmitted for the first time, power of test according to self estimates the second channel quality that the modulation coding mode obtaining the first channel quality and described data block is corresponding, and obtains described first channel quality and the difference of described second channel quality;
First submodule, for using described difference as described channel quality offset.
Wherein, described process submodule includes:
First processing unit, the first signal to noise ratio of the data block obtaining first time transmission and the first modulation coding mode of described data block use is estimated for the power of test according to self, and the modulation coding mode-signal to noise ratio conversion table by presetting, determine second signal to noise ratio corresponding with described first modulation coding mode, obtain described first signal to noise ratio and the difference of described second signal to noise ratio, using the described difference difference as described first channel quality Yu described second channel quality;
Second processing unit, first signal to noise ratio of multiple layers that obtain the data block that first time transmits and multiple layers of the first modulation coding mode used of described data block are estimated for the power of test according to self, and the modulation coding mode-signal to noise ratio conversion table by presetting, determine second signal to noise ratio corresponding with described first modulation coding mode, obtain multiple differences of described first signal to noise ratio and described second signal to noise ratio one to one, using the plurality of difference difference as described first channel quality Yu described second channel quality;
3rd processing unit, first signal to noise ratio of multiple layers that obtain the data block that first time transmits and multiple layers of the first modulation coding mode used of described data block are estimated for the power of test according to self, and the modulation coding mode-signal to noise ratio conversion table by presetting, determine second signal to noise ratio corresponding with described first modulation coding mode, obtain multiple differences of described first signal to noise ratio and described second signal to noise ratio one to one, using the meansigma methods of the plurality of difference difference as described first channel quality Yu described second channel quality;
Fourth processing unit, the first signal to noise ratio of the data block obtaining first time transmission and the first modulation coding mode of described data block use is estimated for the power of test according to self, and the modulation coding mode-signal to noise ratio conversion table by presetting, determine second modulation coding mode corresponding with described first signal to noise ratio, obtain described second modulation coding mode and the difference of described first modulation coding mode, using the described difference difference as described first channel quality Yu described second channel quality;
5th processing unit, the first signal to noise ratio of the data block obtaining first time transmission and the first modulation coding mode of described data block use is estimated for the power of test according to self, and the channel quality instruction-signal to noise ratio conversion table by presetting, determine that first corresponding with described first signal to noise ratio adjusts channel quality instruction, by default channel quality instruction-modulation coding mode conversion table, determine the second channel quality instruction corresponding with described first modulation coding mode, obtain the described first difference adjusting channel quality instruction and the instruction of described second channel quality, using the described difference difference as described first channel quality Yu described second channel quality.
Wherein, the modulation coding mode that terminal uses, when for terminal distribution modulation coding mode, is determined, according to the channel quality offset reported for the previous period of terminal, in base station.
Wherein, the described channel quality offset reported for the previous period according to terminal determines that the step of the modulation coding mode that terminal uses includes:
The first channel quality evaluation the 3rd signal to noise ratio according to terminal to report, obtain terminal up-to-date channel quality offset reported in Preset Time before, when described channel quality offset is signal to noise ratio, it is adjusted obtaining the 4th signal to noise ratio to described 3rd signal to noise ratio according to described channel quality offset, by default modulation coding mode-signal to noise ratio conversion table, it is determined that the modulation coding mode corresponding with described 4th signal to noise ratio; Or
The first channel quality evaluation the 3rd signal to noise ratio according to terminal to report, the channel quality offset of the terminal to report in acquisition preset time period, described channel quality offset is smoothed the channel quality offset obtaining optimizing, when the channel quality offset of described optimization is signal to noise ratio, described 3rd signal to noise ratio is adjusted obtaining the 4th signal to noise ratio by the channel quality offset according to described optimization, by default modulation coding mode-signal to noise ratio conversion table, it is determined that the modulation coding mode corresponding with described 4th signal to noise ratio; Or
The first channel quality evaluation the 3rd signal to noise ratio according to terminal to report, the channel quality offset of the terminal to report in acquisition preset time period, described channel quality offset is smoothed the channel quality offset obtaining optimizing, when the channel quality offset of described optimization is modulation coding mode, by default modulation coding mode-signal to noise ratio conversion table, determine threeth modulation coding mode corresponding with described 3rd signal to noise ratio, be adjusted obtaining the 4th modulation coding mode to described 3rd modulation coding mode according to the channel quality offset of described optimization; Or
The first channel quality evaluation the 3rd signal to noise ratio according to terminal to report, obtain terminal up-to-date channel quality offset reported in Preset Time before, when described channel quality offset is modulation coding mode, by default modulation coding mode-signal to noise ratio conversion table, determine threeth modulation coding mode corresponding with described 3rd signal to noise ratio, be adjusted obtaining the 4th modulation coding mode to described 3rd modulation coding mode according to described channel quality offset.
In sum, when the terminal of the embodiment of the present invention receives the data block of first time transmission, estimate according to the power of test of self and obtain the first channel quality. First channel quality contains the relevant parameter of channel quality, such as channel quality instruction, signal to noise ratio etc. Obtain the second channel quality that the modulation coding mode of this data block is corresponding simultaneously, second channel quality pack is containing the relevant parameter identical with the first channel quality, get the difference of the first channel quality and second channel quality, again this difference is reported base station as channel quality offset, base station just can be made according to this channel quality offset, it is determined that the modulation coding mode MCS that terminal uses. Wherein, channel quality offset can pass through channel quality instruction, signal to noise ratio or modulation demodulation system realization. So, terminal to report channel quality offset, the suitable adjustment to transmission next time is achieved by this channel quality offset, determine the modulation coding mode being more suitable for present data transmission, compared to the existing scheme being fixed adjustment, there is the higher suitability, be not only suitable for successional Fullbuffer business, and it is also suitable the ftp business of noncontinuity, improve handling capacity.
It should be noted that this terminal is the terminal applying the above-mentioned method determining end modification coded system MCS, the implementation of the above-mentioned method determining end modification coded system MCS is applicable to this terminal, also can reach identical technique effect.
As it is shown in figure 5, embodiments of the invention additionally provide a kind of base station, including:
Channel quality offset between the second channel quality that acquisition module 30, the first channel quality of the data block that the first time for obtaining terminal to report transmits and the modulation coding mode of described data block are corresponding;
Determine module 40, for according to described channel quality offset, it is determined that the modulation coding mode MCS that terminal uses.
Wherein, when described channel quality offset is the data block that terminal obtains first time transmission, power of test according to self estimates the second channel quality that the modulation coding mode obtaining the first channel quality and described data block is corresponding, obtain described first channel quality and the difference of described second channel quality, and using described difference as described channel quality offset.
Wherein, when described terminal obtains the data block of first time transmission, power of test according to self estimates the second channel quality that the modulation coding mode obtaining the first channel quality and described data block is corresponding, and the step of the difference obtaining described first channel quality and described second channel quality includes:
Power of test estimation according to self obtains the first signal to noise ratio of the data block of first time transmission and the first modulation coding mode of described data block use, and the modulation coding mode-signal to noise ratio conversion table by presetting, determine second signal to noise ratio corresponding with described first modulation coding mode, obtain described first signal to noise ratio and the difference of described second signal to noise ratio, using the described difference difference as described first channel quality Yu described second channel quality; Or
Power of test estimation according to self obtains the first signal to noise ratio of multiple layers of the data block of first time transmission and multiple layers of the first modulation coding mode used of described data block, and the modulation coding mode-signal to noise ratio conversion table by presetting, determine second signal to noise ratio corresponding with described first modulation coding mode, obtain multiple differences of described first signal to noise ratio and described second signal to noise ratio one to one, using the plurality of difference difference as described first channel quality Yu described second channel quality; Or
Power of test estimation according to self obtains first signal to noise ratio of during first time transmission multiple layers of data block and multiple layers of the first modulation coding mode used of described data block, and the modulation coding mode-signal to noise ratio conversion table by presetting, determine second signal to noise ratio corresponding with described first modulation coding mode, obtain multiple differences of described first signal to noise ratio and described second signal to noise ratio one to one, using the meansigma methods of the plurality of difference difference as described first channel quality Yu described second channel quality; Or
Power of test estimation according to self obtains the first signal to noise ratio of the data block of first time transmission and the first modulation coding mode of described data block use, and the modulation coding mode-signal to noise ratio conversion table by presetting, determine second modulation coding mode corresponding with described first signal to noise ratio, obtain described second modulation coding mode and the difference of described first modulation coding mode, using the described difference difference as described first channel quality Yu described second channel quality;
Power of test estimation according to self obtains the first signal to noise ratio of the data block of first time transmission and the first modulation coding mode of described data block use, and the channel quality instruction-signal to noise ratio conversion table by presetting, determine that first corresponding with described first signal to noise ratio adjusts channel quality instruction, by default channel quality instruction-modulation coding mode conversion table, determine the second channel quality instruction corresponding with described first modulation coding mode, obtain the described first difference adjusting channel quality instruction and the instruction of described second channel quality, using the described difference difference as described first channel quality Yu described second channel quality.
Wherein, described determine module specifically for base station when for terminal distribution modulation coding mode, determine, according to the channel quality offset reported for the previous period of terminal, the modulation coding mode that terminal uses.
Wherein, described determine that module includes:
First determines submodule, for the first channel quality evaluation the 3rd signal to noise ratio according to terminal to report, obtain terminal up-to-date channel quality offset reported in Preset Time before, when described channel quality offset is signal to noise ratio, it is adjusted obtaining the 4th signal to noise ratio to described 3rd signal to noise ratio according to described channel quality offset, by default modulation coding mode-signal to noise ratio conversion table, it is determined that the modulation coding mode corresponding with described 4th signal to noise ratio;
Second determines submodule, for the first channel quality evaluation the 3rd signal to noise ratio according to terminal to report, the channel quality offset of the terminal to report in acquisition preset time period, described channel quality offset is smoothed the channel quality offset obtaining optimizing, when the channel quality offset of described optimization is signal to noise ratio, described 3rd signal to noise ratio is adjusted obtaining the 4th signal to noise ratio by the channel quality offset according to described optimization, by default modulation coding mode-signal to noise ratio conversion table, it is determined that the modulation coding mode corresponding with described 4th signal to noise ratio;
3rd determines submodule, for the first channel quality evaluation the 3rd signal to noise ratio according to terminal to report, the channel quality offset of the terminal to report in acquisition preset time period, described channel quality offset is smoothed the channel quality offset obtaining optimizing, when the channel quality offset of described optimization is modulation coding mode, by default modulation coding mode-signal to noise ratio conversion table, determine threeth modulation coding mode corresponding with described 3rd signal to noise ratio, described 3rd modulation coding mode is adjusted obtaining the 4th modulation coding mode by the channel quality offset according to described optimization,
4th determines submodule, for the first channel quality evaluation the 3rd signal to noise ratio according to terminal to report, obtain terminal up-to-date channel quality offset reported in Preset Time before, when described channel quality offset is modulation coding mode, by default modulation coding mode-signal to noise ratio conversion table, determine threeth modulation coding mode corresponding with described 3rd signal to noise ratio, be adjusted obtaining the 4th modulation coding mode to described 3rd modulation coding mode according to described channel quality offset.
In sum, after the base station of embodiments of the invention obtains the channel quality offset between the second channel quality that the modulation coding mode of the first channel quality of the data block of the first time transmission of terminal to report and this data block is corresponding, according to channel quality offset, it is determined that the modulation coding mode MCS that terminal uses. The suitable adjustment to transmission next time is achieved by channel quality offset, determine the modulation coding mode being more suitable for present data transmission, compared to the existing scheme being fixed adjustment, there is the higher suitability, not only it is suitable for successional Fullbuffer business, and it is also suitable the ftp business of noncontinuity, improve handling capacity.
It should be noted that this base station is the base station applying the above-mentioned method determining end modification coded system MCS, the implementation of the above-mentioned method determining end modification coded system MCS is applicable to this base station, also can reach identical technique effect.
The above is the preferred embodiment of the present invention; it should be pointed out that, for those skilled in the art, under the premise without departing from principle of the present invention; can also making some improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention.

Claims (10)

1. the method determining end modification coded system MCS, it is characterised in that including:
Terminal estimation receives the first channel quality of the data block of first time transmission and the second channel quality corresponding for modulation coding mode MCS of described data block, and calculates the channel quality offset between described first channel quality and described second channel quality;
Described channel quality offset is reported base station, so that base station is according to described channel quality offset, it is determined that the modulation coding mode MCS that terminal uses.
2. the method determining end modification coded system MCS according to claim 1, it is characterized in that, the estimation of described terminal receives the first channel quality of the data block of first time transmission and the second channel quality corresponding for modulation coding mode MCS of described data block, and the step calculating the channel quality offset between described first channel quality and described second channel quality includes:
When obtaining the data block of first time transmission, estimate, according to the power of test of self, the second channel quality that the modulation coding mode obtaining the first channel quality and described data block is corresponding, and obtain described first channel quality and the difference of described second channel quality;
Using described difference as described channel quality offset.
3. the method determining end modification coded system MCS according to claim 1, it is characterized in that, during the data block that described acquisition first time transmits, power of test according to self estimates the second channel quality that the modulation coding mode obtaining the first channel quality and described data block is corresponding, and the step obtaining the difference of described first channel quality and described second channel quality includes:
Power of test estimation according to self obtains the first signal to noise ratio of the data block of first time transmission and the first modulation coding mode of described data block use, and the modulation coding mode-signal to noise ratio conversion table by presetting, determine second signal to noise ratio corresponding with described first modulation coding mode, obtain described first signal to noise ratio and the difference of described second signal to noise ratio, using the described difference difference as described first channel quality Yu described second channel quality; Or
Power of test estimation according to self obtains the first signal to noise ratio of multiple layers of the data block of first time transmission and multiple layers of the first modulation coding mode used of described data block, and the modulation coding mode-signal to noise ratio conversion table by presetting, determine second signal to noise ratio corresponding with described first modulation coding mode, obtain multiple differences of described first signal to noise ratio and described second signal to noise ratio one to one, using the plurality of difference difference as described first channel quality Yu described second channel quality; Or
Power of test estimation according to self obtains the first signal to noise ratio of multiple layers of the data block of first time transmission and multiple layers of the first modulation coding mode used of described data block, and the modulation coding mode-signal to noise ratio conversion table by presetting, determine second signal to noise ratio corresponding with described first modulation coding mode, obtain multiple differences of described first signal to noise ratio and described second signal to noise ratio one to one, using the meansigma methods of the plurality of difference difference as described first channel quality Yu described second channel quality; Or
Power of test estimation according to self obtains the first signal to noise ratio of the data block of first time transmission and the first modulation coding mode of described data block use, and the modulation coding mode-signal to noise ratio conversion table by presetting, determine second modulation coding mode corresponding with described first signal to noise ratio, obtain described second modulation coding mode and the difference of described first modulation coding mode, using the described difference difference as described first channel quality Yu described second channel quality;
Power of test estimation according to self obtains the first signal to noise ratio of the data block of first time transmission and the first modulation coding mode of described data block use, and the channel quality instruction-signal to noise ratio conversion table by presetting, determine that first corresponding with described first signal to noise ratio adjusts channel quality instruction, by default channel quality instruction-modulation coding mode conversion table, determine the second channel quality instruction corresponding with described first modulation coding mode, obtain the described first difference adjusting channel quality instruction and the instruction of described second channel quality, using the described difference difference as described first channel quality Yu described second channel quality.
4. the method determining end modification coded system MCS, it is characterised in that including:
Obtain the channel quality offset between the second channel quality that the modulation coding mode of first channel quality of data block of the first time transmission of terminal to report and described data block is corresponding;
According to described channel quality offset, it is determined that the modulation coding mode MCS that terminal uses.
5. the method determining end modification coded system MCS according to claim 4, it is characterised in that described according to described channel quality offset, it is determined that the step of the modulation coding mode MCS that terminal uses includes:
The modulation coding mode that terminal uses, when for terminal distribution modulation coding mode, is determined, according to the channel quality offset reported for the previous period of terminal, in base station.
6. the method determining end modification coded system MCS according to claim 5, it is characterised in that the described channel quality offset reported for the previous period according to terminal determines that the step of the modulation coding mode that terminal uses includes:
The first channel quality evaluation the 3rd signal to noise ratio according to terminal to report, obtain terminal up-to-date channel quality offset reported in Preset Time before, when described channel quality offset is signal to noise ratio, it is adjusted obtaining the 4th signal to noise ratio to described 3rd signal to noise ratio according to described channel quality offset, by default modulation coding mode-signal to noise ratio conversion table, it is determined that the modulation coding mode corresponding with described 4th signal to noise ratio; Or
The first channel quality evaluation the 3rd signal to noise ratio according to terminal to report, the channel quality offset of the terminal to report in acquisition preset time period, described channel quality offset is smoothed the channel quality offset obtaining optimizing, when the channel quality offset of described optimization is signal to noise ratio, described 3rd signal to noise ratio is adjusted obtaining the 4th signal to noise ratio by the channel quality offset according to described optimization, by default modulation coding mode-signal to noise ratio conversion table, it is determined that the modulation coding mode corresponding with described 4th signal to noise ratio; Or
The first channel quality evaluation the 3rd signal to noise ratio according to terminal to report, the channel quality offset of the terminal to report in acquisition preset time period, described channel quality offset is smoothed the channel quality offset obtaining optimizing, when the channel quality offset of described optimization is modulation coding mode, by default modulation coding mode-signal to noise ratio conversion table, determine threeth modulation coding mode corresponding with described 3rd signal to noise ratio, be adjusted obtaining the 4th modulation coding mode to described 3rd modulation coding mode according to the channel quality offset of described optimization; Or
The first channel quality evaluation the 3rd signal to noise ratio according to terminal to report, obtain terminal up-to-date channel quality offset reported in Preset Time before, when described channel quality offset is modulation coding mode, by default modulation coding mode-signal to noise ratio conversion table, determine threeth modulation coding mode corresponding with described 3rd signal to noise ratio, be adjusted obtaining the 4th modulation coding mode to described 3rd modulation coding mode according to described channel quality offset.
7. a terminal, it is characterised in that including:
Processing module, receive the first channel quality of the data block of first time transmission and the second channel quality corresponding for modulation coding mode MCS of described data block for terminal estimation, and calculate the channel quality offset between described first channel quality and described second channel quality;
Reporting module, for reporting base station by described channel quality offset, so that base station is according to described channel quality offset, it is determined that the modulation coding mode MCS that terminal uses.
8. terminal according to claim 7, it is characterised in that described processing module includes:
Process submodule, during for obtaining the data block transmitted for the first time, power of test according to self estimates the second channel quality that the modulation coding mode obtaining the first channel quality and described data block is corresponding, and obtains described first channel quality and the difference of described second channel quality;
First submodule, for using described difference as described channel quality offset.
9. a base station, it is characterised in that including:
Channel quality offset between the second channel quality that acquisition module, the first channel quality of the data block that the first time for obtaining terminal to report transmits and the modulation coding mode of described data block are corresponding;
Determine module, for according to described channel quality offset, it is determined that the modulation coding mode MCS that terminal uses.
10. base station according to claim 9, it is characterised in that described determine module specifically for base station when for terminal distribution modulation coding mode, determine, according to the channel quality offset reported for the previous period of terminal, the modulation coding mode that terminal uses.
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CN108234076A (en) * 2017-12-26 2018-06-29 广东欧珀移动通信有限公司 Parameter regulation means and device

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