CN104243091B

CN104243091B - A kind of method and device of definite modulation coding scheme

Info

Publication number: CN104243091B
Application number: CN201310247574.4A
Authority: CN
Inventors: 李海朝; 陈艳; 朱莉; 阳建军
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2013-06-20
Filing date: 2013-06-20
Publication date: 2018-05-04
Anticipated expiration: 2033-06-20
Also published as: CN104243091A

Abstract

The present invention discloses a kind of method and device of definite modulation coding scheme, is related to field of communication technology, can improve the accuracy of the MCS for the terminal that multi-user's pairing obtains afterwards, and improves the availability of frequency spectrum of multi-user multiple-input and multiple-output MU MIMO.The first channel quality indicator (CQI) that the present invention is reported by receiving terminal, calculates the first Signal to Interference plus Noise Ratio SINR of the terminal；According to the Packet Error Ratio of the terminal of statistics and the first SINR, the terminal is calculated in the resource used in it and after other-end matched, the 2nd SINR of the terminal；According to the 2nd SINR, the modulation coding scheme MCS of the terminal is determined.Present invention is suitably applied to be used after definite multi-user's pairing during the modulation coding scheme of terminal.

Description

A kind of method and device of definite modulation coding scheme

Technical field

The present invention relates to field of communication technology, more particularly to a kind of method and device of definite modulation coding scheme.

Background technology

In the prior art, terminal needs to measure the quality of down channel and indicates (Channel by channel quality Quality Indicator, CQI) form be reported to base station, for base station carry out descending scheduling.Base station carries out descending scheduling Afterwards, the statistics of Packet Error Ratio is started.Packet Error Ratio within a period of time terminal feed back positive acknowledgment (Acknowledgement, ACK) or in negative confirmation (Negative Acknowledgement, NACK), NACK accounts for the ratio of feedback total degree.Terminal Receive downlink data to start to demodulate afterwards, if demodulating successfully backward base station feedback ACK, if demodulation is unsuccessful to base station Feed back NACK.When the Packet Error Ratio of statistics is less than pre-determined threshold, CQI when base station increase is dispatched, when the Packet Error Ratio of statistics is more than During pre-determined threshold, base station reduces CQI during scheduling, is tabled look-up according to the CQI after adjustment and obtains modulation coding scheme (Modulation and Coding Scheme, MCS).Terminal after multi-user's pairing is calculated according to the MCS of single user MCS。

However, the mode for obtaining MCS in the prior art can be applied to the scene of single user, for the applied field of multi-user Scape, the maximum for providing just to pass scheduling MCS since the MCS of acquisition is limited to MCS Protocol maximum constrained value, i.e., in agreement is 28 Rank, then differ larger, meeting according to the MCS of the obtained multi-users of the MCS of the single user of constraint with the actual adoptable MCS of terminal Cause the reduction of certain customers' availability of frequency spectrum.

The content of the invention

The embodiment of the present invention provides a kind of method and device of definite modulation coding scheme, can improve multi-user's pairing The accuracy of the MCS of the terminal obtained afterwards, and improve the availability of frequency spectrum of multi-user's multiple-input and multiple-output MU-MIMO.

In a first aspect, the embodiment of the present invention provides a kind of method of definite modulation coding scheme, including：

The channel quality indicator (CQI) reported according to terminal, calculates the first Signal to Interference plus Noise Ratio SINR of the terminal；

According to the Packet Error Ratio of the terminal of statistics and the first SINR, resource of the terminal used in it is calculated After upper and other-end is matched, the 2nd SINR of the terminal；

According to the 2nd SINR, the modulation coding scheme MCS of the terminal is determined.

In the first possible embodiment, with reference to first aspect, the channel quality instruction reported according to terminal CQI, calculates the first Signal to Interference plus Noise Ratio SINR of the terminal, including：

Receive the CQI for 4 bits that the terminal reports；

The CQI of 4 bit is converted to the CQI of 5 bits；

According to the CQI of 5 bit and the demodulated signal ability of the terminal, the first SINR of the terminal is calculated.

In second of possible embodiment, with reference to first aspect, the Packet Error Ratio of the terminal according to statistics with And the first SINR, the terminal is calculated in the resource used in it and after other-end matched, the of the terminal Two SINR include：

According to the Packet Error Ratio of the terminal of statistics, the first SINR, the SINR after being adjusted are adjusted；

According to the specific terminal number dispatched on the SINR after adjustment and the terminal used resource, institute is calculated Terminal is stated in the resource used in it and after other-end matched, the 2nd SINR of the terminal.

In the third possible embodiment, with reference to first aspect in second of possible embodiment, it is described according to statistics The terminal Packet Error Ratio, adjust the first SINR, the SINR after being adjusted includes：

Judge whether the Packet Error Ratio of the terminal of statistics is less than default Packet Error Ratio threshold value；

If the Packet Error Ratio is less than default Packet Error Ratio threshold value, according to SINR₃=SINR₁+SINR_AdjustObtain adjustment SINR afterwards₃, wherein, the SINR₃Represent the SINR, the SINR after adjustment₁Represent the first SINR, the SINR_Adjust Represent SINR adjusted values, the SINR_Adjust=2* | I₁-I₂|, wherein the I₁Represent the Packet Error Ratio, the I₂Represent described pre- If Packet Error Ratio threshold value；

If the Packet Error Ratio is more than or equal to default Packet Error Ratio threshold value, according to SINR₃=SINR₁-SINR_AdjustAdjusted SINR after whole₃。

In the 4th kind of possible embodiment, with reference to first aspect in second of possible embodiment or the third may Embodiment, the specific terminal number dispatched on the SINR according to after adjustment and the terminal used resource, calculates 2nd SINR of the terminal, including：

According to SINR₂=SINR₃- 10logL calculates the terminal and is matched in the resource used in it with other-end Afterwards, the 2nd SINR of the terminal, wherein, the SINR₂Represent the 2nd SINR, the SINR₃Represent after adjusting The SINR, the L represents the specific terminal number dispatched on the terminal used resource.

Second aspect, the embodiment of the present invention provide a kind of method of definite modulation coding scheme, including：

The channel quality indicator (CQI) reported according to terminal, and the Packet Error Ratio of the terminal of statistics, calculate the terminal The first CQI；

According to the first CQI, the terminal is calculated in the resource used in it and after other-end matched, it is described The Signal to Interference plus Noise Ratio SINR of terminal or the 2nd CQI of the terminal；

According to the SINR or the 2nd CQI, the modulation coding scheme MCS of the terminal is determined.

In the first possible embodiment, with reference to second aspect, the channel quality instruction reported according to terminal CQI, and the Packet Error Ratio of the terminal of statistics, calculate the first CQI of the terminal, including：

The CQI for 4 bits that receiving terminal reports；

The CQI of 4 bit is converted to the CQI of 5 bits；

If the Packet Error Ratio is less than default Packet Error Ratio threshold value, according to CQI₃=CQI₂+CQT_AdjustAfter being adjusted CQI₃, wherein, the CQI₃Represent the first CQI of the terminal, the CQI₂The CQI of 5 bit before representing to adjust, The CQI_AdjustRepresent CQI adjusted values, the CQI_Adjust=2* | I₁-I₂|, wherein the I₁Represent the Packet Error Ratio, the I₂Represent The default Packet Error Ratio threshold value；

If the Packet Error Ratio is more than or equal to default Packet Error Ratio threshold value, according to CQI₃=CQI₂-CQI_AdjustObtain adjustment CQI afterwards₃。

It is described according to the first CQI with reference to second aspect in second of possible embodiment, calculate the terminal After being matched in resource used in it with other-end, the Signal to Interference plus Noise Ratio SINR of the terminal, including：

According to the CQI₃, calculate the MCS of the terminal；

According to the MCS and default MCS and SINR mapping tables, inquiry obtains the corresponding SINR of the MCS, The default MCS and SINR mapping tables include being more than the MCS of the predetermined number of MCS specified in communication protocol and right The SINR answered；

The specific terminal number dispatched on the SINR and the terminal used resource obtained according to inquiry, calculates institute Terminal is stated in the resource used in it and after other-end matched, the SINR of the terminal.

It is described according to inquiry with reference to second in second aspect possible embodiment in the third possible embodiment The specific terminal number dispatched on the SINR and the terminal used resource obtained, calculates the terminal used in it After being matched in resource with other-end, the SINR of the terminal, including：

According to SINR₄=SINR-10logL calculates the terminal and is matched in the resource used in it with other-end Afterwards, the SINR of the terminal, wherein, the SINR₄Represent that the SINR, the SINR represent the SINR that inquiry obtains, The L represents the specific terminal number dispatched on the terminal used resource.

In the 4th kind of possible embodiment, with reference to second aspect, according to the first CQI, the terminal is calculated at it After being matched in resource used with other-end, the 2nd CQI of the terminal, including：

According to CQI₄=CQI₃- P, calculates the terminal in the resource used in it and after other-end matched, described 2nd CQI of terminal；Wherein, the CQI₄Represent that the 2nd CQI, the P represent the loss amount during multi-user's pairing.

The third aspect, the embodiment of the present invention provide a kind of device of definite modulation coding scheme, including：

First computing unit, for the channel quality indicator (CQI) reported according to terminal, the first letter for calculating the terminal is dry Make an uproar and compare SINR；

Second computing unit, calculates for the Packet Error Ratio of the terminal according to statistics and first computing unit The first SINR arrived, calculates the terminal in the resource used in it and after other-end matched, the terminal 2nd SINR；

Determination unit, for the 2nd SINR being calculated according to second computing unit, determines the terminal Modulation coding scheme MCS.

In the first possible embodiment, with reference to the third aspect, first computing unit, including：

Receiving module, the CQI of 4 bits reported for receiving terminal；

Modular converter, for the CQI of 4 bit to be converted to；

Computing module, for the CQI and the demodulated signal ability of the terminal according to 5 bit, calculates the end First SINR at end.

In second of possible embodiment, with reference to the third aspect, second computing unit, including：

Module is adjusted, for the Packet Error Ratio of the terminal according to statistics, the first SINR is adjusted, after being adjusted SINR；

Computing module, for according to the specific end dispatched on the SINR after adjustment and the terminal used resource Number is held, calculates the terminal in the resource used in it and after other-end matched, the 2nd SINR of the terminal.

In the third possible embodiment, with reference to second in the third aspect possible embodiment, the adjustment module, Including：

Judging submodule, for judging whether the Packet Error Ratio for counting the terminal is less than default Packet Error Ratio threshold value；

First adjustment submodule, if being less than default Packet Error Ratio threshold value for the Packet Error Ratio, according to SINR₃= SINR₁+SINR_AdjustSINR after being adjusted₃, wherein, the SINR₃Represent the SINR, the SINR after adjustment₁Represent First SINR, the SINR_AdjustRepresent SINR adjusted values, the SINR_Adjust=2* | I₁-I₂|, wherein the I₁Represent the mistake Bag rate, the I₂Represent the default Packet Error Ratio threshold value；

Second adjustment submodule, if being more than or equal to default Packet Error Ratio threshold value for the Packet Error Ratio, according to SINR₃ =SINR₁-SINR_AdjustSINR after being adjusted₃。

In the 4th kind of possible embodiment, with reference to second in the third aspect possible embodiment or the third possibility Embodiment, the computing module, is specifically used for：

Fourth aspect, the embodiment of the present invention provide a kind of device of definite modulation coding scheme, including：

First computing unit, for the channel quality indicator (CQI) reported according to terminal, and the mistake of the terminal of statistics Bag rate, calculates the first CQI of the terminal；

Second computing unit, for the first CQI being calculated according to first computing unit, calculates the end Hold in resource used in it and after other-end matched, the of the Signal to Interference plus Noise Ratio SINR of the terminal or the terminal Two CQI；

Determination unit, for the SINR being calculated according to second computing unit or the 2nd CQI, really The modulation coding scheme MCS of the fixed terminal.

In the first possible embodiment, with reference to fourth aspect, first computing unit, including：

Receiving module, the CQI of 4 bits reported for receiving terminal；

Modular converter, for the CQI of 4 bit to be converted to；

Judgment module, for judging whether the Packet Error Ratio of the terminal of statistics is less than default Packet Error Ratio threshold value；

First determining module, if being less than default Packet Error Ratio threshold value for the Packet Error Ratio, according to CQI₃=CQI₂+ CQI_AdjustCQI after being adjusted₃, wherein, the CQI₃Represent the first CQI of the terminal, the CQI₂Before representing to adjust 5 bit CQI, the CQI_AdjustRepresent CQI adjusted values, the CQI_Adjust=2* | I₁-I₂|, wherein the I₁Described in expression Packet Error Ratio, the I₂Represent the default Packet Error Ratio threshold value；

Second determining module, if being more than or equal to default Packet Error Ratio threshold value for the Packet Error Ratio, according to CQI₃= CQI₂-CQI_AdjustCQI after being adjusted₃。

In second of possible embodiment, with reference to fourth aspect, second computing unit, including：

First computing module, for according to the CQI₃, calculate the MCS of the terminal；

Enquiry module, for according to the MCS and default MCS and SINR mapping tables, inquiring about described in obtaining MCS corresponding SINR, the default MCS include default more than MCS specified in communication protocol with SINR mapping tables The MCS of number and corresponding SINR；

Second computing module, for the SINR obtained according to inquiry and the tool dispatched on the terminal used resource Body terminal number, calculates the terminal in the resource used in it and after other-end matched, the SINR of the terminal.

In the third possible embodiment, with reference to second in fourth aspect possible embodiment, described second calculates Module, is specifically used for：

In the third possible embodiment, with reference to fourth aspect, second computing unit, is specifically used for：

The embodiment of the present invention provides a kind of method and device of definite modulation coding scheme, passes through the letter reported according to terminal Road quality indicator (CQI), calculates the first Signal to Interference plus Noise Ratio SINR of the terminal；According to the Packet Error Ratio of the terminal of statistics and institute The first SINR is stated, calculates the terminal in the resource used in it and after other-end matched, the second of the terminal SINR；According to the 2nd SINR, the modulation coding scheme MCS of the terminal is determined；Or the channel matter reported according to terminal Amount instruction CQI, and the Packet Error Ratio of the terminal of statistics, calculate the first CQI of the terminal；According to the first CQI, meter The terminal is calculated in the resource used in it and after other-end matched, the Signal to Interference plus Noise Ratio SINR or described of the terminal 2nd CQI of terminal；According to the SINR or the 2nd CQI, the modulation coding scheme MCS of the terminal is determined.

With in the prior art since the MCS of acquisition is limited to MCS Protocol maximum constrained value, i.e., providing MCS most in agreement Big value is 28 ranks, then according to the MCS of the obtained multi-users of the MCS of the single user of constraint and the actual adoptable MCS phases of terminal Difference is larger, and certain customers' availability of frequency spectrum can be caused to reduce and compared, the embodiment of the present invention is by the way that the terminal received reported CQI is converted to SINR, calculates the SINR after multi-user's pairing by SINR and determines that the SINR after multi-user's pairing is corresponding MCS, either by increasing the scope of MCS or only constraining the MCS finally obtained so that will not to definite MCS into Row limitation, so as to improve the accuracy of the MCS for the terminal that multi-user's pairing obtains afterwards, and it is more to improve multi-user's multi input The availability of frequency spectrum of MU-MIMO is exported, that is, improves the availability of frequency spectrum after multi-user's pairing.

Brief description of the drawings

In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing There is attached drawing needed in technology description to be briefly described, it should be apparent that, drawings in the following description are only this Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also To obtain other attached drawings according to these attached drawings.

Fig. 1 provides a kind of flow chart of the method for definite modulation coding scheme for one embodiment of the invention；

Fig. 2 provides the mapping table between CQI and SINR for one embodiment of the invention；

Fig. 3 provides the flow chart of the method for another definite modulation coding scheme for another embodiment of the present invention；

Fig. 4 provides the flow chart of the method for another definite modulation coding scheme for another embodiment of the present invention；

Fig. 5 provides the flow chart of the method for another definite modulation coding scheme for another embodiment of the present invention；

Fig. 6 provides the mapping table between MCS and SINR for another embodiment of the present invention；

Fig. 7 provides the flow chart of the method for another definite modulation coding scheme for one embodiment of the invention；

Fig. 8 provides the block diagram of the device of another definite modulation coding scheme for another embodiment of the present invention；

Fig. 9 provides the block diagram of the device of another definite modulation coding scheme for another embodiment of the present invention；

Figure 10 provides the block diagram of the device of another definite modulation coding scheme for another embodiment of the present invention；

Figure 11 provides the block diagram of the device of another definite modulation coding scheme for another embodiment of the present invention；

Figure 12 provides the block diagram of the device of another definite modulation coding scheme for another embodiment of the present invention.

Embodiment

Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, those of ordinary skill in the art are obtained every other without creative efforts Embodiment, belongs to the scope of protection of the invention.

The embodiment of the present invention provides a kind of method of definite modulation coding scheme, and the executive agent of this method is base station, such as Shown in Fig. 1, this method includes：

Step 101, the channel quality indicator (CQI) reported according to terminal, calculates the first Signal to Interference plus Noise Ratio SINR of the terminal.

Communication protocol prescribed terminal needs to measure the quality of down channel and is reported to base station by the form of CQI, so as to Base station carries out descending scheduling.

Optionally, the channel quality indicator (CQI) reported according to terminal, calculates the first Signal to Interference plus Noise Ratio SINR of the terminal, Including：

The CQI for 4 bits that receiving terminal reports；

The CQI of 4 bit is converted to the CQI of 5 bits；Optionally, according to

The CQI of 4 bit is converted to the CQI of 5 bits, wherein, it is described CQI₁Represent the CQI, CQI of 4 bit₂Represent the CQI of 5 bit；It should be noted that the value range of CQI for [1, 15]；

Optionally, the channel quality indicator (CQI) that base station receiving terminal reports is the CQI of 4 bits, then again by 4 bits CQI is converted to the CQI of 5 bits.It should be noted that terminal, in order to reduce resource consumption, the CQI reported is 4 bits, and base station , it is necessary to which the CQI used is 5 bit when side be further processed according to CQI, it is therefore desirable to which the CQI of 4 bits is converted to The CQI of 5 bits.

This step calculates Signal to Interference plus Noise Ratio (the signal to interference and of the terminal Noise ratio, SINR) include：According to the CQI of 5 bits and the demodulated signal ability of the terminal, the terminal is calculated First SINR.Wherein, SINR can be referred to as Signal to Interference plus Noise Ratio.SINR refers to the intensity of the useful signal that receives and receives The ratio of interference signal and noise intensity.Interference signal can be the interference signal from other base stations.

It should be noted that the first SINR calculated carries out the SINR before the pairing of multiple terminals for terminal.Optionally, when same When a terminal is dispatched in one resource, then this terminal is known as unit/terminal, when dispatching at least two terminals in same resource, Then the terminal of all scheduling is known as multiple terminals pairing.Wherein, a terminal-pair answers a user, and unit/terminal is properly termed as alone Family, multiple terminals pairing are properly termed as multi-user's pairing.

, it is necessary to set the mapping table between CQI and SINR before the execution of this step, optionally, as shown in Fig. 2, A and b is determined by the demodulated signal ability of terminal respectively in table.After the CQI of 5 bits is obtained, CQI and SINR can be directly looked into Between mapping table obtain terminal first SINR.

Step 102, according to the Packet Error Ratio of the terminal of statistics and the first SINR, the terminal is calculated in its institute After being matched in resource with other-end, the 2nd SINR of the terminal.

Optionally, after carrying out descending scheduling in base station, the statistics of Packet Error Ratio is started.Packet Error Ratio is the terminal within a period of time In the positive acknowledgment ACK or negative confirmation NACK of feedback, the number for feeding back NACK accounts for the ratio of feedback total degree.Terminal receives Start to demodulate after to downlink data, if demodulating successfully backward base station feedback ACK, if demodulation is unsuccessful to base station feedback NACK。

According to the Packet Error Ratio of the terminal of statistics, the first SINR, the SINR after being adjusted are adjusted；It is optional , when the Packet Error Ratio of the terminal of statistics is less than default Packet Error Ratio threshold value, increase SINR on the basis of the first SINR Adjusted value, when the Packet Error Ratio of the terminal of statistics is more than or equal to default Packet Error Ratio threshold value, on the basis of the first SINR Reduce SINR adjusted values.Wherein, SINR adjusted values can be determined according to Packet Error Ratio and default Packet Error Ratio threshold value.

According to the specific terminal number dispatched on the SINR after adjustment and the terminal used resource, the end is calculated Hold after being matched in the resource used in it with other-end, the 2nd SINR of the terminal.Dispatched on terminal used resource Terminal number can also be known as multi-user match the number of plies.

Step 103, according to the 2nd SINR, the modulation coding scheme MCS of the terminal is determined.

According to the 2nd SINR after definite multi-user's pairing, reflecting for the SINR set according to communication protocol and MCS is inquired about Penetrate relation table, it may be determined that the MCS of multi-user.

The embodiment of the present invention provides a kind of method of definite modulation coding scheme, passes through the channel quality reported according to terminal Indicate CQI, calculate the first SINR of the terminal；According to the Packet Error Ratio of the terminal of statistics and the first SINR, meter The terminal is calculated in the resource used in it and after other-end matched, the 2nd SINR of the terminal；According to described Two SINR, determine the modulation coding scheme MCS of the terminal.With in the prior art since the MCS of acquisition is limited to MCS Protocol most The maximum that MCS is provided in big binding occurrence, i.e. agreement is 28 ranks, then is calculated according to the MCS of the single user of constraint multi-purpose The MCS at family differs larger with the actual adoptable MCS of terminal, and certain customers' availability of frequency spectrum can be caused to reduce and compared, this hair Bright embodiment is converted to SINR by the CQI for reporting the terminal received, calculates the SINR of multi-user by SINR and determines Multi-user the corresponding MCS of SINR so that definite MCS will not be limited, it is matched so as to improve multi-user The accuracy of the MCS of the terminal obtained afterwards, and improve the availability of frequency spectrum of multi-user's multiple-input and multiple-output MU-MIMO, that is, improve The availability of frequency spectrum after multi-user's pairing.

Another embodiment of the present invention provides a kind of method of definite modulation coding scheme, and the executive agent of this method is base Stand, as shown in figure 3, this method includes：

Step 301, the channel quality indicator (CQI) reported according to terminal, and the Packet Error Ratio of the terminal of statistics, calculate First CQI of the terminal；

Optionally, this step includes：

The CQI for 4 bits that receiving terminal reports；

The CQI of 4 bit is converted to the CQI of 5 bits；Optionally, according to

If the Packet Error Ratio is less than default Packet Error Ratio threshold value, according to CQI₃=CQI₂+CQI_AdjustAfter being adjusted CQI₃, wherein, the CQI₃Represent the first CQI of the terminal, the CQI₂The CQI of 5 bit before representing to adjust, The CQI_AdjustRepresent CQI adjusted values, the CQI_Adjust=2* | I₁-I₂|, wherein the I₁Represent the Packet Error Ratio, the I₂Represent The default Packet Error Ratio threshold value；

Optionally, before this step, the channel quality indicator (CQI) that base station receiving terminal reports is the CQI of 4 bits, so The CQI of 4 bits is converted to the CQI of 5 bits afterwards.It should be noted that terminal, in order to reduce resource consumption, the CQI reported is 4 Bit, and base station side is carried out when being further processed according to CQI, it is necessary to which the CQI used is 5 bit, it is therefore desirable to by 4 bits CQI be converted to the CQI of 5 bits.

Step 302, according to the first CQI, calculate the terminal and matched somebody with somebody in the resource used in it with other-end To rear, the Signal to Interference plus Noise Ratio SINR of the terminal or the 2nd CQI of the terminal；

Optionally, according to the first CQI, calculate the terminal and matched in the resource used in it with other-end Afterwards, during the SINR of the terminal, it can calculate first according to the first CQI and obtain corresponding MCS.It should be noted that count at this time Calculate obtain MCS may be more than MCS specified in communication protocol, the value range of MCS specified in communication protocol for [0, 28], that is, the MCS for calculating acquisition is likely larger than 28.In the present embodiment, do not constrain calculating the MCS obtained.In the prior art Middle to need to constrain the MCS more than 28 of acquisition, i.e., when MCS is more than 28, it is 28 to determine MCS.

According to the MCS and default MCS and SINR mapping tables, inquiry obtains the corresponding SINR of the MCS, The default MCS and SINR mapping tables include being more than the MCS of the predetermined number of MCS specified in communication protocol and right The SINR answered.For example, in the MCS and the SINR mapping tables that set, MCS can using value as 0-33, or MCS can using value as 0-38 etc..

Optionally, the terminal is calculated in the resource used in it and after other-end matched according to the first CQI, institute When stating two CQI of terminal, the loss amount acquisition second during multi-user's pairing can be subtracted according to the CQI after adjustment CQI.Wherein, the loss amount during multi-user's pairing can be matched between the number of plies and the pairing user of estimation according to multi-user The calculating such as interference obtain.

Optionally, when dispatching a terminal in same resource, then this terminal is known as unit/terminal, when in same resource When dispatching at least two terminals, then the terminal of all scheduling is known as multiple terminals pairing.Wherein, a terminal-pair answers a user, Unit/terminal is properly termed as single user, and multiple terminals pairing is properly termed as multi-user's pairing.

Step 303, according to the SINR or the 2nd CQI, the modulation coding scheme MCS of the terminal is determined.

Optionally, the MCS after obtaining multi-user's pairing can be inquired about according to SINR and MCS mapping tables.

Optionally, MCS is determined according to MCS=MIN (the 2nd CQI), i.e., to calculating second after the multi-user obtained matches CQI is constrained, and obtains MCS.It should be noted that the value range of the MCS obtained is scope as defined in communication protocol, i.e., The value range of MCS is [0,28].

The embodiment of the present invention provides a kind of method of definite modulation coding scheme, passes through the first CQI reported according to terminal The 2nd CQI, and the Packet Error Ratio of the terminal of statistics are converted to, calculates the first CQI of the terminal；According to described first CQI, calculates the terminal in the resource used in it and after other-end matched, the Signal to Interference plus Noise Ratio SINR of the terminal or 2nd CQI of terminal described in person；According to the SINR or the 2nd CQI, the modulation coding scheme of the terminal is determined MCS.With in the prior art since the MCS of acquisition is limited to MCS Protocol maximum constrained value, i.e., providing the maximum of MCS in agreement For 28 ranks, then the MCS and actual adoptable MCS of terminal after the multi-user's pairing obtained according to the MCS of the single user of constraint Differ larger, certain customers' availability of frequency spectrum can be caused to reduce and compared, the embodiment of the present invention is by increasing the scope or only of MCS The MCS finally obtained is constrained, so as to improve the accuracy of the MCS for the terminal that multi-user's pairing obtains afterwards, and The availability of frequency spectrum of multi-user's multiple-input and multiple-output MU-MIMO is improved, that is, improves the availability of frequency spectrum after multi-user's pairing.

The method that the embodiment of the present invention provides another definite modulation coding scheme, as shown in figure 4, this method includes：

Step 401, the channel quality indicator (CQI) for 4 bits that base station receiving terminal reports, and the CQI of 4 bit is turned It is changed to the CQI of 5 bits.

In this step, according toThe CQI of 4 bit is converted into 5 bits CQI, wherein, the CQI₁Represent the CQI, CQI of 4 bit₂Represent the CQI of 5 bit.It should be noted that CQI Value range be [1,15].

It should be noted that terminal, in order to reduce resource consumption, the CQI reported is 4 bits, and base station side carries out basis , it is necessary to which the CQI used is 5 bit when CQI is further processed, it is therefore desirable to which the CQI of 4 bits is converted to 5 bits CQI。

Step 402, base station calculates the first SINR of the terminal according to the CQI of 5 bit.

According to the CQI of 5 bits and the demodulating information ability of terminal, first when computing terminal user is single user SINR.Specifically, the CQI of 5 bits is filtered, the CQI and SINR mapping relations set further according to filtered CQI inquiries Table, so that it is determined that the SINR of single user.Such as the setting CQI shown in Fig. 2 and SINR mapping tables, in the table, a and b is by end The demodulating information ability at end determines.

Step 403, base station counts the Packet Error Ratio of the terminal.

Optionally, after terminal receives downlink data, the downlink data received is demodulated.When demodulation downlink data success Afterwards, to base station feedback ACK, to base station feedback NACK if demodulation is unsuccessful.Base station counts what is received within a period of time NACK number accounts for the ratio of feedback total degree, and obtained ratio is Packet Error Ratio.

Step 404, base station judges whether the Packet Error Ratio is less than default Packet Error Ratio threshold value.

Default Packet Error Ratio threshold value can be configured according to practical experience.

Step 405, if the Packet Error Ratio is less than default Packet Error Ratio threshold value, base station is according to SINR₃=SINR₁+ SINR_AdjustSINR after being adjusted₃。

Wherein, the SINR₃Represent the SINR, the SINR after adjustment₁Represent the first SINR, the SINR_AdjustTable Show SINR adjusted values, the SINR_Adjust=2* | I₁-I₂|, wherein the I₁Represent the Packet Error Ratio, the I₂Represent described default Packet Error Ratio threshold value.

Packet Error Ratio is less than default Packet Error Ratio threshold value, illustrates that channel condition is preferable at this time, at this time can be according to channel status The SINR of terminal is adjusted, i.e., increases SINR adjusted values on the basis of former SINR, to improve the traffic volume of useful signal, so as to obtain Obtain the maximum throughput under current channel condition.

Need to illustrate when, SINR in order to prevent₂It is excessive, the maximum of a SINR can be set, this SINR maximum At least above SINR value corresponding equal to MCS28 ranks.

Step 406, if the Packet Error Ratio is more than or equal to default Packet Error Ratio threshold value, base station is according to SINR₃=SINR₁- SINR_AdjustSINR after being adjusted₃。

It should be noted that the SINR after the adjustment obtained in step 405 and step 406₃For the SINR of single user, SINR i.e. before multi-user's pairing.

Step 407, base station judges whether terminal user is pairing user.

Step 408, when terminal user is single user, base station is according to the SINR₃Inquire about MCS and SINR mapping tables Obtain the corresponding MCS of single user.

Step 409, when terminal user is matches user, base station is according to the SINR₃And the terminal used resource The specific terminal number of upper scheduling, calculates the 2nd SINR after multi-user's pairing.

Optionally, the terminal number dispatched on terminal used resource is referred to as the pairing number of plies, for example, terminal money used 4 terminals are scheduled at the same time on source, then the pairing number of plies of multi-user is 4.

According to SINR₃And the pairing number of plies, calculate the SINR after multi-user's pairing.For example, according to SINR₂=SINR₃- After the 10logL calculating terminal is matched in the resource used in it with other-end, described the second of the terminal SINR, wherein, the SINR₂Represent the 2nd SINR, the SINR₃Represent that the SINR after adjustment, the L are represented The specific terminal number dispatched on the terminal used resource.

Step 410, according to the 2nd SINR, base station determines the modulating-coding side of the terminal after multi-user's pairing Formula MCS.

The 2nd SINR after being matched according to multi-user inquires about default SINR and MCS mapping tables, can obtain multi-purpose MCS after the pairing of family.

The embodiment of the present invention provides a kind of method of definite modulation coding scheme, passes through the channel quality reported according to terminal Indicate CQI, calculate the first SINR of the terminal；According to the Packet Error Ratio of the terminal of statistics and the first SINR, meter The terminal is calculated in the resource used in it and after other-end matched, the 2nd SINR of the terminal；According to described Two SINR, determine the MCS of the terminal.With in the prior art since the MCS of acquisition is limited to MCS Protocol maximum constrained value, i.e., The maximum that MCS is provided in agreement be 28 ranks, then MCS after the multi-user's pairing obtained according to the MCS of the single user of constraint and The adoptable MCS differences of actual terminal are larger, and certain customers' availability of frequency spectrum can be caused to reduce and compared, the embodiment of the present invention is led to Cross the CQI that the terminal that will be received reports and be converted to SINR, the SINR of multi-user is calculated by SINR and definite multi-user matches somebody with somebody MCS to after so that definite MCS will not be limited, the terminal obtained afterwards is matched so as to improve multi-user The accuracy of MCS, and improve the availability of frequency spectrum of multi-user's multiple-input and multiple-output MU-MIMO, i.e., after raising multi-user pairing The availability of frequency spectrum.

The method that the embodiment of the present invention provides another definite modulation coding scheme, as shown in figure 5, this method includes：

Step 501, the channel quality indicator (CQI) for 4 bits that base station receiving terminal reports, and the CQI of 4 bit is turned It is changed to the CQ I of 5 bits.

The execution method of this step is identical with step 401 in attached drawing 4, and this is no longer going to repeat them.

Step 502, base station counts the Packet Error Ratio of the terminal.

The execution method of this step is identical with step 403 in attached drawing 4, and this is no longer going to repeat them.

Step 503, base station judges whether the Packet Error Ratio is less than default Packet Error Ratio threshold value.

Step 504, if the Packet Error Ratio is less than default Packet Error Ratio threshold value, base station is according to CQI₃=CQI₂+CQI_AdjustObtain CQI after must adjusting₃。

Wherein, the CQI₃Represent the first CQI of the terminal, the CQI₂Represent 5 bit before adjustment CQI, the CQI_AdjustRepresent CQI adjusted values, the CQI_Adjust=2* | I₁-I₂|, wherein the I₁Represent the Packet Error Ratio, the I₂ Represent the default Packet Error Ratio threshold value.

Packet Error Ratio is less than default Packet Error Ratio threshold value, illustrates that channel condition is preferable at this time, at this time can be according to channel status Adjust the CQI of terminal, you can to increase CQI adjusted values on the basis of former CQI, so that the maximum under obtaining current channel condition Handling capacity.

Step 505, if the Packet Error Ratio is more than or equal to default Packet Error Ratio threshold value, base station is according to CQI₃=CQI₂- CQI_AdjustCQI after being adjusted₃。

It should be noted that the CQI after the adjustment obtained in step 504 and step 505₃For the CQI of single user, i.e., CQI before multi-user's pairing.

Step 506, according to the CQI₃, base station calculates the MCS of the terminal.

In this step, not to CQI₃Constrained.I.e. communication protocol regulation CQI value ranges are in the prior art [1,15], the CQI obtained in step 504 or step 505₃Value can be more than 15.Then according to the CQI of acquisition₃According to existing There is the MCS that technology determines user equipment downlink scheduling data.

It should be noted that due to CQI₃Without constraint, then the MCS obtained may exceed model as defined in communication protocol Enclose, for example, the value of MCS is 29.

When terminal user is single user, then follow-up step is not performed.When terminal user is matches user, then continue Perform follow-up step.

Step 507, according to the MCS and default MCS and SINR mapping tables, described in base station inquiry obtains The corresponding SINR of MCS.

The default MCS includes being more than the predetermined number of MCS specified in communication protocol with SINR mapping tables MCS and corresponding SINR.It is [0,28] in the value range of MCS specified in communication protocol, in the present embodiment, MCS is also Other values can be taken, for example, MCS is 29,30,31 etc..Reflecting between the value and SINR after MCS extensions as shown in Figure 6 Penetrate relation table.It should be noted that MCS shown in attached drawing 6 and SINR mapping tables are only an example, specific MCS with Mapping relations between SINR need to obtain afterwards with verification by analysis.

Step 508, the specific terminal dispatched on the SINR and the terminal used resource obtained according to inquiry Number, after the base station calculating terminal is matched in the resource used in it with other-end, the SINR of the terminal.

Optionally, the terminal number dispatched on terminal used resource is referred to as the pairing number of plies of multi-user.For example, eventually 4 terminals are scheduled at the same time on the used resource of end, then the pairing number of plies of multi-user is 4.

According to SINR and the pairing number of plies, calculate the terminal and matched in the resource used in it with other-end Afterwards, the SINR of terminal after the SINR of the terminal, i.e. multi-user pairing.For example, according to SINR₄=SINR-10logL calculates institute Terminal is stated in the resource used in it and after other-end matched, the SINR of the terminal, wherein, the SINR₄Represent It is specific that the SINR, the SINR represent that the SINR that inquiry obtains, the L represent to dispatch on the terminal used resource Terminal number.

Step 509, according to the terminal in resource used in it and after other-end matched, the terminal SINR, base station determine the MCS of the terminal.

SINR after being matched according to multi-user inquires about default SINR and MCS mapping tables, can obtain multi-user's MCS。

The embodiment of the present invention provides a kind of method of definite modulation coding scheme, by the way that the MCS in communication protocol is carried out Extension so that CQI is not constrained after CQI is determined, so as to obtain the MCS not constrained, and according to the MCS after extension with The inquiry of SINR mapping tables obtains SINR, and obtains the SINR after multi-user's pairing by SINR, so as to obtain multi-user's MCS so that the accuracy of the MCS for the terminal that multi-user's pairing obtains afterwards can be improved, and how defeated improve multi-user's multi input Go out the availability of frequency spectrum of MU-MIMO, that is, improve the availability of frequency spectrum after multi-user's pairing.

As shown in fig. 7, the embodiment of the present invention provides a kind of method of definite modulation coding scheme, it is necessary to which explanation, attached Step 701-705 is identical with step 501-505 in attached drawing 5 in Fig. 7, and this is no longer going to repeat them, and in fig. 7 also no longer Show.

This method further includes：

Step 706, base station judges whether terminal user is pairing user.

Step 707, when terminal user is single user, base station is then according to MCS=MIN (CQI₃) determine the tune of the terminal Coding mode MCS processed.

In this step, due to not to CQI₃Constrained.I.e. communication protocol provides CQI value ranges in the prior art For [1,15], the CQI obtained in step 704 or step 705₃Value can be more than 15, it is thus determined that the terminal user For single user when the terminal MCS when, it is necessary to CQI₃Constrained.Work as CQI₃Value be more than 15 when, determine CQI₃Value For 15, then further according to 15 values for determining MCS.Work as CQI₃Value be less than or equal to 15 when, then directly according to CQI₃Value determine MCS Value.

Step 706, when terminal user is matches user, base station calculates the terminal and exists according to the first CQI After being matched in resource used in it with other-end, the 2nd CQI of the terminal.

Optionally, according to CQI₄=CQI₃- P, calculates the terminal and is matched in the resource used in it with other-end Afterwards, the 2nd CQI of the terminal；Wherein, the CQI₄Represent that the 2nd CQI, the P represent that multi-user matches process In loss amount.Wherein, the loss amount during pairing can be according between the pairing user of multi-user's pairing number of plies and estimation The calculating such as interference obtain.

It should be noted that in this step, not to CQI₃Constrained.I.e. communication protocol provides in the prior art CQI value ranges are [1,15], the CQI obtained in step 504 or step 505₃Value can be more than 15.Then basis obtains The CQI obtained₃The CQI after multi-user's pairing is obtained according to the method described above.

It should be noted that due to CQI₃Without constraint, then the CQI obtained₄Model as defined in communication protocol may be exceeded Enclose, for example, CQI₄Value be 17.

Step 707, the 2nd CQI after being matched according to the multi-user, base station determines the modulation coding scheme of the terminal MCS。

Optionally, according to MCS=MIN (CQI₄) determine MCS, i.e., carried out to calculating the CQI after the multi-user obtained matches Constraint, obtains MCS.It should be noted that the value range of the MCS obtained is scope as defined in communication protocol, the i.e. value of MCS Scope is [0,28].

The embodiment of the present invention provides a kind of method of definite modulation coding scheme, passes through the channel quality reported according to terminal Indicate CQI, and the Packet Error Ratio of the terminal of statistics, calculate the first CQI of the terminal；According to the first CQI, calculate After the terminal is matched in the resource used in it with other-end, the 2nd CQI of the terminal；According to described second CQI, determines the modulation coding scheme MCS of terminal.With in the prior art since the MCS of acquisition is limited to MCS Protocol maximum constrained Value, i.e., the maximum that MCS is provided in agreement is 28 ranks, then after the multi-user obtained according to the MCS of the single user of constraint matches MCS differs larger with the actual adoptable MCS of terminal, and certain customers' availability of frequency spectrum can be caused to reduce and compared, the present invention is real Example is applied by increasing the scope of MCS or only the MCS finally obtained being constrained, so as to improve multi-user pairing after The accuracy of the MCS of the terminal of acquisition, and improve the availability of frequency spectrum of multi-user's multiple-input and multiple-output MU-MIMO, that is, improve more The availability of frequency spectrum after user's pairing.

The embodiment of the present invention provides a kind of device of definite modulation coding scheme, as shown in figure 8, the device can be base Stand, which includes：First computing unit 801, the second computing unit 802, determination unit 803；

First computing unit 801, for the channel quality indicator (CQI) reported according to terminal, calculates the first of the terminal Signal to Interference plus Noise Ratio SINR；

Second computing unit 802, Packet Error Ratio and first computing unit 801 for the terminal according to statistics The first SINR being calculated, after the terminal is matched in the resource used in it with other-end, the terminal The 2nd SINR；

Determination unit 803, for the 2nd SINR being calculated according to second computing unit 802, determines institute State end modification coding mode MCS.

It is further alternative, as shown in figure 9, first computing unit 801, including：Receiving module 8011, modular converter 8012, computing module 8013.

Receiving module 8011, the CQI of 4 bits reported for receiving terminal；

Modular converter 8012, for the CQI of 4 bit will be converted to the CQI of 5 bits；

Optionally, according toThe CQI of 4 bit is converted into 5 bits CQI, wherein, the CQI₁Represent the CQI, CQI of 4 bit₂Represent the CQI of 5 bit；It should be noted that CQI Value range is [1,15]；

Computing module 8013, for the CQI and the demodulated signal ability of the terminal according to 5 bit, calculates institute State the first SINR of terminal.

The CQI of 5 bits is filtered, the CQI and SINR mapping tables set further according to filtered CQI inquiries, So that it is determined that the SINR of single user.Such as the setting CQI shown in Fig. 2 and SINR mapping tables, in the table, a and b is by terminal Demodulating information ability determines.

It is further alternative, as shown in figure 9, second computing unit 802, including：Adjust module 8021, computing module 8022；

Module 8021 is adjusted, for the Packet Error Ratio of the terminal according to statistics, the first SINR is adjusted, is adjusted SINR afterwards；

Computing module 8022, for according to the tool dispatched on the SINR after adjustment and the terminal used resource Body terminal number, calculates the 2nd SINR of the terminal.

It is further alternative, the adjustment module 8021, including：Judging submodule 80211, the first adjustment submodule 80212, second adjustment submodule 80213；

Judging submodule 80211, for judging whether the Packet Error Ratio for counting the terminal is less than default Packet Error Ratio threshold value；

Optionally, after terminal receives downlink data, the downlink data received is demodulated.When demodulation downlink data success Afterwards, to base station feedback ACK, to base station feedback NACK if demodulation is unsuccessful.Base station counts what is received within a period of time The number of NACK accounts for the ratio of feedback total degree, and obtained ratio is Packet Error Ratio.

First adjustment submodule 80212, if being less than default Packet Error Ratio threshold value, basis for the Packet Error Ratio SINR₃=SINR₁+SINR_AdjustSINR after being adjusted₃, wherein, the SINR₃Represent the SINR after adjustment, it is described SINR₁Represent the first SINR, the SINR_AdjustRepresent SINR adjusted values, the SINR_Adjust=2* | I₁-I₂|, wherein the I₁ Represent the Packet Error Ratio, the I₂Represent the default Packet Error Ratio threshold value；

Second adjustment submodule 80213, if being more than or equal to default Packet Error Ratio threshold value, basis for the Packet Error Ratio SINR₃=SINR₁-SINR_AdjustSINR after being adjusted₃。

It is further alternative, as shown in figure 9, the computing module 8022 is specifically used for：

It is further alternative, when terminal user is single user, according to the SINR₃Inquire about MCS and SINR mapping relations Table obtains the corresponding MCS of single user.

It should be noted that in 9 shown device of attached drawing 8 or attached drawing, the specific implementation process of its modules and each The contents such as the information exchange between a module, due to being based on same inventive concept, the side of may refer to the method for the present invention embodiment Method embodiment, does not repeat one by one herein.

The embodiment of the present invention provides a kind of device of definite modulation coding scheme, by the first computing unit according to receiving CQI calculate the first SINR, the first CQI that receiving unit is received is converted to the 2nd CQI, according to the 2nd CQI computing terminals SINR, and described first be calculated according to the Packet Error Ratio of the terminal of statistics and first computing unit SINR, calculates the terminal in the resource used in it and after other-end matched, the 2nd SINR of the terminal；According to The 2nd SINR that second computing unit is calculated, determines the modulation coding scheme MCS of the terminal.With existing skill Since the MCS of acquisition is limited to MCS Protocol maximum constrained value in art, i.e., the maximum that MCS is provided in agreement is 28 ranks, then basis MCS after multi-user's pairing that the MCS of the single user of constraint is obtained differs larger with the actual adoptable MCS of terminal, can lead Cause certain customers' availability of frequency spectrum to reduce to compare, the embodiment of the present invention is converted to by the CQI for reporting the terminal received SINR, the corresponding MCS of SINR of the SINR and definite multi-user after multi-user's pairing is calculated by SINR so that will not be to true Fixed MCS is limited, and so as to improve the accuracy of the MCS for the terminal that multi-user's pairing obtains afterwards, and is improved multi-purpose The availability of frequency spectrum of family multiple-input and multiple-output MU-MIMO, that is, improve the availability of frequency spectrum after multi-user's pairing.

The embodiment of the present invention provides the device of another definite modulation coding scheme, which can be base station, such as Figure 10 Shown, which includes：Memory 1001, processor 1002；

Memory 1001, the information of program is included for storing；

Processor 1002, is connected with memory 1001, for controlling the execution of described program, specifically includes：According to terminal The channel quality indicator (CQI) reported, calculates the first SINR of the terminal；And according to the Packet Error Ratio of the terminal of statistics with And the first SINR being calculated, the terminal is calculated in the resource used in it and after other-end matched, institute State the 2nd SINR of terminal；And according to the 2nd SINR, determine the modulation coding scheme MCS of the terminal.

Channel quality indicator (CQI) further alternative, that processor 1002 is reported according to terminal, calculates the of the terminal During one Signal to Interference plus Noise Ratio SINR, specifically include：

The CQI for 4 bits that receiving terminal reports；

The CQI of 4 bit is converted to the CQ I of 5 bits；

It is further alternative, the terminal is calculated in the resource used in it and after other-end matched, the end During two SINR at end, the processor 1002 is specifically used for：

According to the Packet Error Ratio of the terminal of statistics, the first SINR, the SINR after being adjusted are adjusted；And root According to the specific terminal number dispatched on the SINR after adjustment and the terminal used resource, the of the terminal is calculated Two SINR.

It is further alternative, according to the Packet Error Ratio of the terminal of statistics, the SINR is adjusted, after being adjusted During SINR, the processor 1002 is specifically used for：Judge whether the Packet Error Ratio for counting the terminal is less than default Packet Error Ratio thresholding Value；And if the Packet Error Ratio is less than default Packet Error Ratio threshold value, according to SINR₃=SINR₁+SINR_AdjustAfter being adjusted SINR₃, wherein, the SINR₃Represent the SINR, the SINR after adjustment₁Represent the first SINR, the SINR_AdjustTable Show SINR adjusted values, the SINR_Adjust=2* | I₁-I₂|, wherein the I₁Represent the Packet Error Ratio, the I₂Represent described default Packet Error Ratio threshold value；And if the Packet Error Ratio is more than or equal to default Packet Error Ratio threshold value, according to SINR₃=SINR₁- SINR_AdjustSINR after being adjusted₃。

It is further alternative, according to the specific end dispatched on the SINR after adjustment and the terminal used resource Number is held, calculates the terminal in the resource used in it and after other-end matched, during two SINR of the terminal, The processor 1002 is specifically used for：

It should be noted that in 10 shown device of attached drawing, the specific implementation process and modules of its modules it Between the content such as information exchange, due to being based on same inventive concept with the method for the present invention embodiment, may refer to embodiment of the method, Do not repeat one by one herein.

The embodiment of the present invention provides a kind of device of definite modulation coding scheme, by processor by the terminal received The CQI of report is converted to SINR, the MCS of SINR and definite multi-user after multi-user's pairing is calculated by SINR so that will not Definite MCS is limited, so as to improve the accuracy of the MCS for the terminal that multi-user's pairing obtains afterwards, and is improved The availability of frequency spectrum of multi-user's multiple-input and multiple-output MU-MIMO, that is, improve the availability of frequency spectrum after multi-user's pairing.

The embodiment of the present invention provides the device of another definite modulation coding scheme, which can be base station, referring to attached Shown in Fig. 8, which includes：First computing unit 801, the second computing unit 802, determination unit 803；

First computing unit 801, for the channel quality indicator (CQI) reported according to terminal, and the terminal of statistics Packet Error Ratio, calculate the first CQI of the terminal；

Second computing unit 802, for the first CQI being calculated according to first computing unit 801, calculates After the terminal is matched in the resource used in it with other-end, the Signal to Interference plus Noise Ratio SINR of the terminal or the end 2nd CQI at end；

Determination unit 803, for calculating the 802 obtained SINR or described second according to second computing unit CQI, determines the modulation coding scheme MCS of the terminal.

It is further alternative, as shown in figure 11, first computing unit 801, including：Receiving module 11011, modulus of conversion Block 11012, judgment module 11013, the first determining module 11014, the second determining module 11015；

Receiving module 11011, the channel quality indicator (CQI) of 4 bits reported for receiving terminal；

Modular converter 11012, for the CQI of 4 bit to be converted to the CQI of 5 bits；

Judgment module 11013, for judging whether the Packet Error Ratio of the terminal of statistics is less than default Packet Error Ratio threshold value；

First determining module 11014, if being less than default Packet Error Ratio threshold value for the Packet Error Ratio, according to CQI₃= CQI₂+CQI_AdjustCQI after being adjusted₃, wherein, the CQI₃Represent the first CQI of the terminal, the CQI₂Represent to adjust The CQI, the CQI of 5 bit before whole_AdjustRepresent CQI adjusted values, the CQI_Adjust=2* | I₁-I₂|, wherein the I₁Table Show the Packet Error Ratio, the I₂Represent the default Packet Error Ratio threshold value；

Second determining module 11015, if being more than or equal to default Packet Error Ratio threshold value, basis for the Packet Error Ratio CQI₃=CQI₂-CQI_AdjustCQI after being adjusted₃。

In this step, not to CQI₃Constrained.I.e. in the prior art communication protocol regulation CQI value ranges [1, 15], the CQI after the adjustment of acquisition₃Value can be more than 15.Then according to the CQI of acquisition₃Terminal is determined according to the prior art The MCS of descending scheduling data.

It is further alternative, as shown in figure 12, second computing unit 802, including：First computing module 11021, is looked into Ask module 11022, the second computing module 11023；

First computing module 11021, for according to the CQI₃, calculate the MCS of the terminal；

Enquiry module 11022, for being obtained according to the MCS and default MCS and SINR mapping tables, inquiry The MCS corresponding SINR, the default MCS include being more than MCS specified in communication protocol with SINR mapping tables The MCS of predetermined number and corresponding SINR；

Second computing module 11023, is raised for the SINR obtained according to inquiry and the terminal used resource The specific terminal number of degree, calculates the terminal in the resource used in it and after other-end matched, the terminal SINR。

Optionally, second computing module 11023, is specifically used for：

It is further alternative, the terminal is calculated in the resource used in it and after other-end matched, the end During two CQI at end, second computing unit 802, is specifically used for：

According to CQI₄=CQI₃- P, calculates the terminal in the resource used in it and after other-end matched, described The 2nd CQI of terminal；Wherein, the CQI₄Represent that the 2nd CQI, the P represent the damage during multi-user's pairing Vector.

It should be noted that in 11 shown device of attached drawing, the specific implementation process and modules of its modules it Between the content such as information exchange, due to being based on same inventive concept with the method for the present invention embodiment, may refer to embodiment of the method, Do not repeat one by one herein.

The embodiment of the present invention provides a kind of device of definite modulation coding scheme, passes through the channel quality reported according to terminal Indicate CQI, and the Packet Error Ratio of the terminal of statistics, the first computing unit calculates the first CQI of the terminal；According to described The first CQI that first computing unit is calculated, the second computing unit calculate the terminal in the resource used in it and After other-end is matched, the Signal to Interference plus Noise Ratio SINR of the terminal or the 2nd CQI of the terminal；According to the described second meter The SINR or the 2nd CQI that unit is calculated are calculated, determines the modulation coding scheme MCS of the terminal.With it is existing Since the MCS of acquisition is limited to MCS Protocol maximum constrained value in technology, i.e., the maximum that MCS is provided in agreement is 28 ranks, then root MCS after the multi-user's pairing obtained according to the MCS of the single user of constraint differs larger with the actual adoptable MCS of terminal, meeting Cause certain customers' availability of frequency spectrum to reduce to compare, the embodiment of the present invention is by increasing the scope of MCS or only obtaining to final MCS constrained, so as to improve the accuracy for the MCS of terminal that multi-user's pairing obtains afterwards, and improve multi-user The availability of frequency spectrum of multiple-input and multiple-output MU-MIMO, that is, improve the availability of frequency spectrum after multi-user's pairing.

The embodiment of the present invention provides the device of another definite modulation coding scheme, which can be base station, such as Figure 12 Shown, which includes：Memory 1201, processor 1202；

Memory 1201, the information of program is included for storing；

Processor 1202, is connected with memory 1201, for controlling the execution of described program, specifically includes：According to terminal The channel quality indicator (CQI) reported, and the Packet Error Ratio of the terminal of statistics, calculate the first CQI of the terminal；And root According to the first CQI, the terminal is calculated in the resource used in it and after other-end matched, the letter of the terminal is done The 2nd CQI to make an uproar than SINR or the terminal；And according to the SINR or the 2nd CQI, determine the terminal Modulation coding scheme MCS.

It is further alternative, when calculating a CQI, the processor 1202,4 bits reported for receiving terminal CQI；

And the CQI of 4 bit is converted to the CQI of 5 bits；

And judge whether the Packet Error Ratio of the terminal of statistics is less than default Packet Error Ratio threshold value；

And if the Packet Error Ratio is less than default Packet Error Ratio threshold value, according to CQI₃=CQI₂+CQI_AdjustObtain adjustment CQI afterwards₃, wherein, the CQI₃Represent the first CQI of the terminal, the CQI₂Represent 5 bit before adjustment CQI, the CQI_AdjustRepresent CQI adjusted values, the CQI_Adjust=2* | I₁-I₂|, wherein the I₁Represent the Packet Error Ratio, the I₂ Represent the default Packet Error Ratio threshold value；

And if the Packet Error Ratio is more than or equal to default Packet Error Ratio threshold value, according to CQI₃=CQI₂-CQI_AdjustAdjusted CQI after whole₃。

It is further alternative, the terminal is calculated in the resource used in it and after other-end matched, the end During the Signal to Interference plus Noise Ratio SINR at end, the processor 1202, is used for：

According to the CQI₃, calculate the MCS of the terminal；And reflected according to the MCS and the default MCS and SINR Relation table is penetrated, inquiry obtains the corresponding SINR of the MCS, and the default MCS includes being more than with SINR mapping tables to communicate The MCS of the predetermined number of MCS specified in agreement and corresponding SINR；

And the SINR obtained according to inquiry and the specific terminal number dispatched on the terminal used resource, meter The terminal is calculated in the resource used in it and after other-end matched, the SINR of the terminal.

Optionally, according to SINR₄=SINR-10logL calculate the terminal in the resource used in it and other-end into After row pairing, the SINR of the terminal, wherein, the SINR₄Represent that the SINR, the SINR represent that inquiry obtains described SINR, the L represent the specific terminal number dispatched on the terminal used resource

It is further alternative, the terminal is calculated in the resource used in it and after other-end matched, the end During two CQI at end, processor 1202 is specifically used for：

It should be noted that in 12 shown device of attached drawing, the specific implementation process and modules of its modules it Between the content such as information exchange, due to being based on same inventive concept with the method for the present invention embodiment, may refer to embodiment of the method, Do not repeat one by one herein.

The embodiment of the present invention provides a kind of device of definite modulation coding scheme, passes through the channel quality reported according to terminal Indicate CQI, and the Packet Error Ratio of the terminal of statistics, processor calculates the first CQI of the terminal；According to described first CQI, calculates the terminal in the resource used in it and after other-end matched, the Signal to Interference plus Noise Ratio SINR of the terminal or 2nd CQI of terminal described in person；And according to the SINR or the 2nd CQI, determine the modulation coding scheme of terminal MCS.With in the prior art since the MCS of acquisition is limited to MCS Protocol maximum constrained value, i.e., providing the maximum of MCS in agreement For 28 ranks, then the MCS and actual adoptable MCS of terminal after the multi-user's pairing obtained according to the MCS of the single user of constraint Differ larger, certain customers' availability of frequency spectrum can be caused to reduce and compared, the embodiment of the present invention is by increasing the scope or only of MCS The MCS finally obtained is constrained, so as to improve the accuracy of the MCS for the terminal that multi-user's pairing obtains afterwards, and The availability of frequency spectrum of multi-user's multiple-input and multiple-output MU-MIMO is improved, that is, improves the availability of frequency spectrum after multi-user's pairing.

It should be noted that device embodiment described above is only schematical, wherein described be used as separating component The unit of explanation may or may not be physically separate, can be as the component that unit is shown or can also It is not physical location, you can with positioned at a place, or can also be distributed in multiple network unit.Can be according to reality Need to select some or all of module therein to realize the purpose of this embodiment scheme.Those of ordinary skill in the art are not In the case of making the creative labor, you can to understand and implement.

Through the above description of the embodiments, it is apparent to those skilled in the art that the present invention can borrow Software is helped to add the mode of required common hardware to realize, naturally it is also possible to include application-specific integrated circuit, specially by specialized hardware Realized with CPU, private memory, special components and parts etc., but the former is more preferably embodiment in many cases.Based on so Understanding, the part that technical scheme substantially in other words contributes the prior art can be with the shape of software product Formula embodies, which is stored in the storage medium that can be read, as the floppy disk of computer, USB flash disk, movement are hard Disk, read-only storage (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), Magnetic disc or CD etc., including some instructions are used so that computer equipment (can be personal computer, server, or Person's network equipment etc.) perform method described in each embodiment of the present invention.

Each embodiment in this specification is described by the way of progressive, identical similar portion between each embodiment Divide mutually referring to what each embodiment stressed is the difference with other embodiment.Especially for device and For system embodiment, since it is substantially similar to embodiment of the method, so describing fairly simple, related part is referring to method The part explanation of embodiment.

The above description is merely a specific embodiment, but protection scope of the present invention is not limited thereto, any Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained Cover within protection scope of the present invention.Therefore, protection scope of the present invention answers the scope of the claims of being subject to.

Claims

A kind of 1. method of definite modulation coding scheme, it is characterised in that the executive agent of the method is base station, including：

The channel quality indicator (CQI) reported according to terminal, calculates the first Signal to Interference plus Noise Ratio SINR of the terminal；

According to the Packet Error Ratio of the terminal of statistics and the first SINR, calculate the terminal in the resource used in it and After other-end is matched, the 2nd SINR of the terminal；

According to the 2nd SINR, the modulation coding scheme MCS of the terminal or multiple terminals is determined.
2. the method for definite modulation coding scheme according to claim 1, it is characterised in that described to be reported according to terminal Channel quality indicator (CQI), calculates the first Signal to Interference plus Noise Ratio SINR of the terminal, including：

Receive the CQI for 4 bits that the terminal reports；

The CQI of 4 bit is converted to the CQI of 5 bits；

According to the CQI of 5 bit and the demodulated signal ability of the terminal, the first SINR of the terminal is calculated.
3. the method for definite modulation coding scheme according to claim 1, it is characterised in that described according to statistics The Packet Error Ratio of terminal and the first SINR, calculate the terminal and are matched in the resource used in it with other-end Afterwards, the 2nd SINR of the terminal includes：

According to the Packet Error Ratio of the terminal of statistics, the first SINR, the SINR after being adjusted are adjusted；

According to the specific terminal number dispatched on the SINR after adjustment and the terminal used resource, the end is calculated Hold after being matched in the resource used in it with other-end, the 2nd SINR of the terminal.
4. the method for definite modulation coding scheme according to claim 3, it is characterised in that described according to statistics The Packet Error Ratio of terminal, adjusts the first SINR, and the SINR after being adjusted includes：

Judge whether the Packet Error Ratio of the terminal of statistics is less than default Packet Error Ratio threshold value；

If the Packet Error Ratio is less than default Packet Error Ratio threshold value, according to SINR₃=SINR₁+SINR_AdjustAfter being adjusted SINR₃, wherein, the SINR₃Represent the SINR, the SINR after adjustment₁Represent the first SINR, the SINR_AdjustRepresent SINR adjusted values, the SINR_Adjust=2* | I₁-I₂|, wherein the I₁Represent the Packet Error Ratio, the I₂Represent the default mistake Bag rate threshold value；

If the Packet Error Ratio is more than or equal to default Packet Error Ratio threshold value, according to SINR₃=SINR₁-SINR_AdjustObtain adjustment SINR afterwards₃。
5. the method for the definite modulation coding scheme according to claim 3 or 4, it is characterised in that described according to adjustment The specific terminal number dispatched on SINR and the terminal used resource afterwards, calculates the 2nd SINR of the terminal, including：

According to SINR₂=SINR₃After -10logL calculating the terminal is matched in the resource used in it with other-end, institute The 2nd SINR of terminal is stated, wherein, the SINR₂Represent the 2nd SINR, the SINR₃Represent the institute after adjustment SINR is stated, the L represents the specific terminal number dispatched on the terminal used resource.
A kind of 6. method of definite modulation coding scheme, it is characterised in that the executive agent of the method is base station, including：

The channel quality indicator (CQI) reported according to terminal, and the Packet Error Ratio of the terminal of statistics, calculate the of the terminal One CQI；

According to the first CQI, the terminal is calculated in the resource used in it and after other-end matched, the terminal Signal to Interference plus Noise Ratio SINR or the terminal the 2nd CQI；

According to the SINR or the 2nd CQI, the modulation coding scheme MCS of the terminal or multiple terminals is determined.
7. the method for definite modulation coding scheme according to claim 6, it is characterised in that described to be reported according to terminal Channel quality indicator (CQI), and the Packet Error Ratio of the terminal of statistics, calculate the first CQI of the terminal, including：

The CQI for 4 bits that receiving terminal reports；

The CQI of 4 bit is converted to the CQI of 5 bits；

Judge whether the Packet Error Ratio of the terminal of statistics is less than default Packet Error Ratio threshold value；

If the Packet Error Ratio is less than default Packet Error Ratio threshold value, according to CQI₃=CQI₂+CQI_AdjustAfter being adjusted CQI₃, wherein, the CQI₃Represent the first CQI of the terminal, the CQI₂The CQI of 5 bit before representing to adjust, The CQI_AdjustRepresent CQI adjusted values, the CQI_Adjust=2* | I₁-I₂|, wherein the I₁Represent the Packet Error Ratio, the I₂Represent The default Packet Error Ratio threshold value；

If the Packet Error Ratio is more than or equal to default Packet Error Ratio threshold value, according to CQI₃=CQI₂-CQI_AdjustAfter being adjusted CQI₃。
8. the method for definite modulation coding scheme according to claim 7, it is characterised in that described according to described first CQI, calculates the terminal in the resource used in it and after other-end matched, the Signal to Interference plus Noise Ratio SINR of the terminal, Including：

According to the CQI₃, calculate the MCS of the terminal；

According to the MCS and default MCS and SINR mapping tables, inquiry obtains the corresponding SINR of the MCS, described default MCS and SINR mapping tables include being more than the MCS of the predetermined number of MCS specified in communication protocol and corresponding SINR；

The specific terminal number dispatched on the SINR and the terminal used resource obtained according to inquiry, calculates the end Hold after being matched in the resource used in it with other-end, the SINR of the terminal.
9. the method for definite modulation coding scheme according to claim 8, it is characterised in that it is described according to inquiry obtain The specific terminal number dispatched on the SINR and the terminal used resource, calculates the terminal in the resource used in it After being matched with other-end, the SINR of the terminal, including：

According to SINR₄After=SINR-10logL calculating the terminal is matched in the resource used in it with other-end, institute The SINR of terminal is stated, wherein, the SINR₄Represent that the SINR, the SINR represent the SINR, the L that inquiry obtains Represent the specific terminal number dispatched on the terminal used resource.
10. the method for definite modulation coding scheme according to claim 6, it is characterised in that according to the first CQI, The terminal is calculated in the resource used in it and after other-end matched, the 2nd CQI of the terminal, including：

According to CQI₄=CQI₃- P, calculates the terminal in the resource used in it and after other-end matched, the terminal The 2nd CQI；Wherein, the CQI₄Represent that the 2nd CQI, the P represent the loss amount during multi-user's pairing.
A kind of 11. device of definite modulation coding scheme, it is characterised in that including：

First computing unit, for the channel quality indicator (CQI) reported according to terminal, calculates the first Signal to Interference plus Noise Ratio of the terminal SINR；

Second computing unit, is calculated for the Packet Error Ratio of the terminal according to statistics and first computing unit First SINR, calculates the terminal in the resource used in it and after other-end matched, and the second of the terminal SINR；

Determination unit, for the 2nd SINR being calculated according to second computing unit, determines the terminal or more The modulation coding scheme MCS of terminal.
12. the device of definite modulation coding scheme according to claim 11, it is characterised in that described first calculates list Member, including：

Receiving module, the CQI of 4 bits reported for receiving terminal；

Modular converter, for the CQI of 4 bit to be converted to the CQI of 5 bits；

Computing module, for the CQI and the demodulated signal ability of the terminal according to 5 bit, calculates the terminal First SINR.
13. the device of definite modulation coding scheme according to claim 11, it is characterised in that described second calculates list Member, including：

Module is adjusted, for the Packet Error Ratio of the terminal according to statistics, the first SINR is adjusted, after being adjusted SINR；

Computing module, for according to the specific terminal dispatched on the SINR after adjustment and the terminal used resource Number, calculates the terminal in the resource used in it and after other-end matched, the 2nd SINR of the terminal.
14. the device of definite modulation coding scheme according to claim 13, it is characterised in that the adjustment module, bag Include：

Judging submodule, for judging whether the Packet Error Ratio for counting the terminal is less than default Packet Error Ratio threshold value；

First adjustment submodule, if being less than default Packet Error Ratio threshold value for the Packet Error Ratio, according to SINR₃=SINR₁+ SINR_AdjustSINR after being adjusted₃, wherein, the SINR₃Represent the SINR, the SINR after adjustment₁Represent described One SINR, the SINR_AdjustRepresent SINR adjusted values, the SINR_Adjust=2* | I₁-I₂|, wherein the I₁Represent the Packet Error Ratio, The I₂Represent the default Packet Error Ratio threshold value；

Second adjustment submodule, if being more than or equal to default Packet Error Ratio threshold value for the Packet Error Ratio, according to SINR₃= SINR₁-SINR_AdjustSINR after being adjusted₃。
15. the device of the definite modulation coding scheme according to claim 13 or 14, it is characterised in that the calculating mould Block, is specifically used for：

According to SINR₂=SINR₃After -10logL calculating the terminal is matched in the resource used in it with other-end, institute The 2nd SINR of terminal is stated, wherein, the SINR₂Represent the 2nd SINR, the SINR₃Represent the institute after adjustment SINR is stated, the L represents the specific terminal number dispatched on the terminal used resource.
A kind of 16. device of definite modulation coding scheme, it is characterised in that including：

First computing unit, for the channel quality indicator (CQI) reported according to terminal, and the mistake bag of the terminal of statistics Rate, calculates the first CQI of the terminal；

Second computing unit, for the first CQI being calculated according to first computing unit, calculates the terminal and exists After being matched in resource used in it with other-end, the Signal to Interference plus Noise Ratio SINR of the terminal or the second of the terminal CQI；

Determination unit, for the SINR being calculated according to second computing unit or the 2nd CQI, determines institute State the modulation coding scheme MCS of terminal or multiple terminals.
17. the device of definite modulation coding scheme according to claim 16, it is characterised in that described first calculates list Member, including：

Receiving module, the CQI of 4 bits reported for receiving terminal；

Modular converter, for the CQI of 4 bit to be converted to the CQI of 5 bits；

Judgment module, for judging whether the Packet Error Ratio of the terminal of statistics is less than default Packet Error Ratio threshold value；

First determining module, if being less than default Packet Error Ratio threshold value for the Packet Error Ratio, according to CQI₃=CQI₂+CQI_Adjust CQI after being adjusted₃, wherein, the CQI₃Represent the first CQI of the terminal, the CQI₂Represent the institute before adjustment State the CQI of 5 bits, the CQI_AdjustRepresent CQI adjusted values, the CQI_Adjust=2* | I₁-I₂|, wherein the I₁Represent described to wrap by mistake Rate, the I₂Represent the default Packet Error Ratio threshold value；

Second determining module, if being more than or equal to default Packet Error Ratio threshold value for the Packet Error Ratio, according to CQI₃=CQI₂- CQI_AdjustCQI after being adjusted₃。
18. the device of definite modulation coding scheme according to claim 17, it is characterised in that described second calculates list Member, including：

First computing module, for according to the CQI₃, calculate the MCS of the terminal；

Enquiry module, for according to the MCS and default MCS and SINR mapping tables, it is corresponding that inquiry obtains the MCS SINR, the default MCS include the MCS more than the predetermined number of MCS specified in communication protocol with SINR mapping tables And corresponding SINR；

Second computing module, for the SINR obtained according to inquiry and the specific end dispatched on the terminal used resource Number is held, calculates the terminal in the resource used in it and after other-end matched, the SINR of the terminal.
19. the device of definite modulation coding scheme according to claim 18, it is characterised in that described second calculates mould Block, is specifically used for：

According to SINR₄After=SINR-10logL calculating the terminal is matched in the resource used in it with other-end, institute The SINR of terminal is stated, wherein, the SINR₄Represent that the SINR, the SINR represent the SINR, the L that inquiry obtains Represent the specific terminal number dispatched on the terminal used resource.
20. the device of definite modulation coding scheme according to claim 16, it is characterised in that described second calculates list Member, is specifically used for：

According to CQI₄=CQI₃- P, calculates the terminal in the resource used in it and after other-end matched, the terminal The 2nd CQI；Wherein, the CQI₄Represent that the 2nd CQI, the P represent the loss amount during multi-user's pairing.