CN102487308A - Feedback method of channel quality index (CQI) and apparatus thereof - Google Patents

Abstract

The invention discloses a feedback method of a channel quality index (CQI). The method mainly comprises the following steps that: the user equipment (UE) acquires the CQI of a non-cooperative mode in a current coordinated multi-point transmission/reception (CoMP) measurement set, the CQI when all cells participate in cooperation in the current CoMP measurement set and the average CQI when parts of the cells participate in the cooperation in the current CoMP measurement set, and feeds back the each obtained CQI to a network side; or the UE acquires the independent CQI of the each cell in the current CoMP measurement set and an interference average delta of interference generated by all the cell itself except a main service cell, and feeds back the acquired CQI and the interference average delta to the network side. The invention also discloses a corresponding CQI feedback apparatus. In the invention, the network side obtains all the CQIs under the condition of the cooperation set comprised by the current CoMP measurement set and the CQI during non-cooperative transmission so that the cooperation set which is appropriate for the UE can be accurately determined. Feedback cost can be reduced under the condition of guaranteeing feedback precision.

Description

A kind of feedback method and device of channel quality indication

Technical field

The present invention relates to the CoMP technology, relate in particular to a kind of feedback method and device of channel quality indication.

Background technology

For the area coverage that improves cell edge and sub-district average throughput and enlarge high data transmission rate; At senior Long Term Evolution (LTE-A; Advanced Long-Term Evolution) introduced multipoint cooperative transmission (CoMP, Coordinated Multi-Point transmission/reception) technology in the system.

Present descending CoMP technology is divided into two types: first kind is Combined Treatment technology (JP; JointProcessing): each node can obtain data message in the cooperation set; Transmit through a plurality of nodes or a node in synchronization Physical Downlink Shared Channel (PDSCH, Physical Downlink Shared Channel) data; Second kind is cooperative scheduling (CS/CB, Coordinated Scheduling and/orBeamforming): the data message of transmission only obtains at Serving cell, and the affirmation of user's scheduling and wave beam forming is consulted to accomplish through related cell in the cooperation set.

In order to support above-mentioned descending CoMP transmission technology; Have following three kinds of feedback mechanisms among the current LTE-A: first kind; Explicit (explicit) feedback: the user directly feeds back to the base station with the channel condition information that observes; Make the base station obtain channel response information completely, handle without any transmission or receiver; Second kind; Implicit expression (implicit) feedback: after the user observes channel condition information, the channel condition information that obtains is handled, changed into specific quantized values and feed back to the base station; Like order indication (RI; Rank Index), pre-coding matrix indication (PMI, Precoding Matrix Index), channel quality indication (CQI, ChannelQuality Index) information; The third utilizes channel reciprocity, and (UE, UserEquipment) Sounding Reference Signal of uplink (SRS, Sounding Reference Signal) is estimated descending channel condition information through subscriber equipment in the base station.

Mainly there is following defective in prior art: because in the CoMP technology; The cooperation set is the subclass of CoMP measuring assembly; Cooperation set confirmed by network side such as eNodeB, if UE when network side feedback CQI, only feeds back independently CQI and each sub-district PMI independently of each sub-district; Then network side can't be according to these corresponding CQI when independently PMI obtains cooperation transmission, also just can not accurately confirm the cooperation of UE use is gathered; If CQI is confirmed in the cooperation of using before UE adopts set; And only feed back this CQI; So; The cooperation set of adopting at UE and the current definite cooperation of network side are gathered when inconsistent, and the CQI value that network side obtains also is inaccurate, also just can not accurately determine the current sub-district that cooperation is gathered and actual participation is cooperated to the UE use; If UE is except feeding back independently CQI of each sub-district; Also feed back the CQI of each cooperation point combination, though can improve feedback accuracy, network side can accurately determine the cooperation set to the UE use according to the CQI of UE feedback; But because the cooperation point combination is more; The corresponding CQI that will feed back also can be a lot, therefore, can cause feedback overhead too big.

Summary of the invention

In view of this; Main purpose of the present invention is to provide a kind of feedback method and device of channel quality indication, with solve according to the CQI network side of UE feedback can not confirm accurately that the cooperation that UE is used is gathered and existing C QI feedback mechanism in the too big problem of feedback overhead that exists.

For achieving the above object, technical scheme of the present invention is achieved in that

The invention provides the feedback method of a kind of CQI; Said method comprises: average CQI when cooperation is participated in the part sub-district in CQI when all cooperation is participated in sub-districts in the CQI when UE obtains non tie up system in the current C oMP measuring assembly, the current C oMP measuring assembly and the current C oMP measuring assembly, and the CQI that obtains fed back to network side.

In such scheme, said UE obtains said part sub-district when participating in cooperation average CQI, comprising: said UE obtains to include CQI of each cooperation set of any two or more sub-districts in the current C oMP measuring assembly; According to CQI of each the cooperation set that is obtained, obtain the mean value that institute comprises the CQI of each identical cooperation set of number of cells again, average CQI when obtaining the part sub-district and participating in cooperating.

In such scheme; Said UE obtains to include the CQI of each cooperation set of any two or more sub-districts in the current C oMP measuring assembly; For: for any one cooperation set that includes any two or more sub-districts in the current C oMP measuring assembly; Said UE obtain said cooperation set down available signal power, with the ratio of total interference power and noise sum, obtain the CQI of said cooperation set.

In such scheme; Said total interference power includes the interference power of interfered cell to said UE; Wherein, interfered cell obtains through following method the interference power of said UE: said UE records said interfered cell to self channel gain, travels through then that all code words obtain the corresponding emission value of said channel gain among the R8 code book set C; And, obtain the interference power of said interfered cell to UE according to measured channel gain and the emission value that obtains.

In such scheme, the CQI when all cooperation is participated in sub-districts in the said UE acquisition current C oMP measuring assembly, for: said UE acquisition includes the CQI of the cooperation set of whole sub-districts in the current C oMP measuring assembly.

The present invention also provides the feedback device of a kind of CQI; Said device comprises: first acquiring unit and first feedback unit; Wherein, First acquiring unit, average CQI when cooperation is participated in the part sub-district in CQI when all cooperation is participated in sub-districts in the CQI when being used for obtaining current C oMP measuring assembly non tie up system, the current C oMP measuring assembly and the current C oMP measuring assembly; First feedback unit is used for the CQI that said first acquiring unit obtains is fed back to network side.

In such scheme, said computing unit comprises first acquisition module, second acquisition module and the 3rd acquisition module, wherein, and first acquisition module, the CQI when being used for obtaining current C oMP measuring assembly non tie up system; Second acquisition module, the CQI when being used for obtaining the participation cooperation of the whole sub-districts of current C oMP measuring assembly; The 3rd acquisition module, average CQI when being used for obtaining current C oMP measuring assembly part sub-district and participating in cooperation.

In such scheme, said the 3rd acquisition module specifically is used for, and obtains to include the CQI of each cooperation set of any two or more sub-districts in the current C oMP measuring assembly; According to CQI of each the cooperation set that is obtained, obtain the mean value that institute comprises each identical cooperation set CQI of number of cells again, average CQI when obtaining the part sub-district and participating in cooperating.

In such scheme, said second acquisition module specifically is used for, and said UE obtains the CQI of the cooperation set that includes whole sub-districts in the current C oMP measuring assembly.

The present invention also provides the feedback method of a kind of CQI; Said method comprises: UE obtain in the current C oMP measuring assembly each sub-district independently in CQI and the current C oMP measuring assembly except that main Serving cell the interference mean value δ of all sub-districts to self disturbing, and CQI that obtains and interference mean value δ fed back to network side.

In such scheme; Said UE obtains in the current C oMP measuring assembly independently CQI of each sub-district; Comprise: for any sub-district in the current C oMP measuring assembly; Said UE obtains the ratio of this sub-district to self available signal power and the outer interference plus noise power of current C oMP measuring assembly, obtains independently CQI of said sub-district; According to this acquisition methods, UE obtains independently CQI of interior all sub-districts of current C oMP measuring assembly.

In such scheme; Said UE obtains said interference mean value δ; Comprise: said UE obtains in the current C oMP measuring assembly except that main Serving cell other each sub-districts respectively to the interference power of self; The ratio of the outer interference plus noise power to self of the interference power of each sub-district that obtains again being obtained and current C oMP measuring assembly obtains the mean value of resultant each ratio at last, obtains said interference mean value δ.

In such scheme; Said UE obtains in the current C oMP measuring assembly except that main Serving cell other each sub-districts and arrives the interference power of self; Be specially: said UE records the channel gain of said each sub-district to self; Travel through then that all code words obtain the corresponding emission value of said channel gain among the R8 code book set C, and, obtain the interference power of said each sub-district UE according to measured channel gain and the emission value that obtains.

In such scheme; At said UE with the CQI that obtains and disturb after mean value δ feeds back to network side; Said method also comprises: network side is according to the CQI and disturb mean value δ independently of each sub-district in the current C oMP measuring assembly of said UE feedback, the CQI when cooperation is participated in the part sub-district in CQI when all cooperation is participated in sub-districts in the CQI when obtaining non tie up system in the current C oMP measuring assembly, the current C oMP measuring assembly and the current C oMP measuring assembly.

The present invention also provides the feedback device of a kind of CQI; Said device comprises: the second acquisition unit and second feedback unit; Wherein, Second acquisition unit is used for obtaining each sub-district of current C oMP measuring assembly interference mean value δ that independently disturb said UE all sub-districts except that main Serving cell in CQI and the current C oMP measuring assembly; Second feedback unit, the CQI and the average interference value δ that are used for said second acquisition unit is obtained feed back to network side.

In such scheme, said second acquisition unit comprises: the 4th acquisition module and the 5th acquisition module, and wherein, the 4th acquisition module is used for obtaining independently CQI of each sub-district of current C oMP measuring assembly; The 5th acquisition module is used for obtaining the current C oMP measuring assembly interference mean value δ that disturb said UE all sub-districts except that main Serving cell.

In such scheme; Said the 4th acquisition module specifically is used for, for any sub-district in the current C oMP measuring assembly; Obtain the ratio of this sub-district, obtain independently CQI of said sub-district to available signal power and the outer interference plus noise power of current C oMP measuring assembly of said UE; According to this acquisition methods, obtain independently CQI of interior all sub-districts of current C oMP measuring assembly.

In such scheme; Said the 5th acquisition module; Specifically be used for, obtain in the current C oMP measuring assembly except that main Serving cell other each sub-districts respectively to the interference power of self, the interference power of each sub-district that obtains again being obtained and current C oMP measuring assembly are outward to self the ratio of interference plus noise power; Obtain the mean value of resultant each ratio at last, obtain said interference mean value δ.

In such scheme; Said network side comprises the 3rd acquiring unit; Be used for; According to the CQI and disturb mean value δ independently of each sub-district in the current C oMP measuring assembly of said UE feedback, the CQI when cooperation is participated in the part sub-district in CQI when all cooperation is participated in sub-districts in the CQI when obtaining non tie up system in the current C oMP measuring assembly, the current C oMP measuring assembly and the current C oMP measuring assembly.

CQI feedback scheme provided by the present invention; Average CQI when the CQI when UE only need feed back the non-CoMP of current C oMP measuring assembly, the CQI when all participating in cooperation and subparticipation cooperation; Perhaps; Only need that each sub-district not only can make network side can obtain current C oMP measuring assembly and comprise the CQI under all set situation of cooperating the interference mean value δ of UE in CQI and the current C oMP measuring assembly of each sub-district in the feedback current C oMP measuring assembly, and the CQI of network side can also obtain non-cooperation transmission the time; Thereby network side can accurately be confirmed the cooperation of suitable UE and gather, also accurately confirms suitable downlink transfer modulation coding mode (MCS; And can guarantee to reduce feedback overhead under the prerequisite of feedback accuracy Modulation and Coding Scheme).

Description of drawings

Fig. 1 is the realization flow figure of the feedback method of a kind of CQI of the present invention;

Fig. 2 is the realization flow figure of the feedback method of the another kind of CQI of the present invention;

Fig. 3 is the sketch map of the CoMP measuring assembly of the embodiment of the invention one;

Fig. 4 comprises the sketch map of cooperation set for the CoMP measuring assembly of the embodiment of the invention one;

Fig. 5 be in the embodiment of the invention one UE to the sketch map of the channel quality parameter of network side feedback;

Fig. 6 is the sketch map of the embodiment of the invention two CoMP measuring assemblies;

Fig. 7 be in the embodiment of the invention two UE to the sketch map of the channel quality parameter of network side feedback;

Fig. 8 be in the embodiment of the invention three UE to the sketch map of the channel quality parameter of network side feedback;

Fig. 9 be in the embodiment of the invention four UE to the sketch map of the channel quality parameter of network side feedback.

Embodiment

In the practical application, network side is like eNodeB or other Control Node; Like relay station, macro base station etc.; At first confirm the CoMP measuring assembly, the channel quality when gathering transmission according to respectively cooperating in the CoMP measuring assembly of UE feedback is then confirmed the cooperation of UE use is gathered.Here, the cooperation set is smaller or equal to measuring assembly.

Basic thought of the present invention is: average CQI when UE obtains that cooperation is participated in the part sub-district in the current C oMP measuring assembly, and pass through the average CQI that obtained, each CQI when coming the instead of part sub-district to participate in cooperation feeds back to network side; Perhaps; UE obtain in the current C oMP measuring assembly each sub-district independently in CQI and the current C oMP measuring assembly except that main Serving cell all sub-districts to the interference mean value δ of said UE interference; And feed back to network side; The approximation of CQI when cooperation was participated in the part sub-district in CQI and the current C oMP measuring assembly when all cooperation was participated in sub-districts in CQI, the current C oMP measuring assembly when obtaining non-cooperation transmission in the current C oMP measuring assembly by network side again; Thereby under the prerequisite that guarantees feedback accuracy, the feedback quantity when having reduced UE feedback CQI.

The feedback method of a kind of CQI of the present invention, with reference to shown in Figure 1, said method mainly comprises:

Average CQI when cooperation is participated in the part sub-district in CQI when all cooperation is participated in sub-districts in the CQI when step 101:UE obtains non tie up system in the current C oMP measuring assembly, the current C oMP measuring assembly and the current C oMP measuring assembly;

Step 102:UE feeds back to network side with the CQI that is obtained.

Wherein, UE obtains said part sub-district when participating in cooperation average CQI, specifically can comprise: said UE obtains to include CQI of each cooperation set of any two or more sub-districts in the current C oMP measuring assembly; According to CQI of resulting each cooperation set, obtain the mean value that institute comprises each identical cooperation set CQI of number of cells again, average CQI when obtaining the part sub-district and participating in cooperating.

Here, each the cooperation set that includes any two or more sub-districts in the current C oMP measuring assembly does not comprise and comprises all cooperation of sub-districts set in the current C oMP measuring assembly.

If comprise four sub-districts in the current C oMP measuring assembly altogether; Average CQI was two altogether when cooperation was participated in so resulting part sub-district; One of them is the mean value that comprises each cooperation set CQI of main Serving cell and any other sub-districts in the current C oMP measuring assembly, and another is to comprise the mean value that main Serving cell and each cooperation of any two other sub-districts in the current C oMP measuring assembly are gathered CQI.

Particularly; For any one cooperation set that includes any two or more sub-districts in the current C oMP measuring assembly; Said UE obtain said cooperation set down available signal power, with the ratio of total interference power and noise sum, obtain the CQI of said cooperation set.Wherein, said total interference power includes the interference power of interfered cell to said UE.Here, the sub-district that is not included in said cooperation set in the current C oMP measuring assembly is the interfered cell of said UE, and the cooperation set is different, and the interfered cell of said UE is also just different.

Here; Interfered cell obtains through following method the interference power of said UE: said UE records the channel gain of said interfered cell to self; Travel through then that all code words obtain the corresponding emission value of said channel gain among the R8 code book set C; And, obtain the interference power of said interfered cell to UE according to measured channel gain and the emission value that obtains.

Under the JP situation; For any one cooperation set that includes any two or more sub-districts in the current C oMP measuring assembly; When obtaining its corresponding CQI; The available signal power of UE is specially in the said cooperation set each sub-district to the available signal power sum of UE, total interference power plus noise of said UE be specially interfered cell in the current C oMP measuring assembly to the interference power of UE, with the outer interference power plus noise sum of current C oMP measuring assembly.

Under the CS/CB situation; For any one cooperation set that includes any two or more sub-districts in the current C oMP measuring assembly; When obtaining its corresponding CQI; The main Serving cell that the available signal power of UE is specially said UE is to the available signal power of UE service, total interference power plus noise of said UE be specially in the current C oMP measuring assembly except that main Serving cell each sub-district to the interference power of UE, with current C oMP measuring assembly interference power plus noise sum outward.In the current C oMP measuring assembly except that main Serving cell each sub-district comprise in the cooperation set interfered cell except that each sub-district of main Serving cell and cooperation are gathered.

CQI when all cooperation is participated in sub-districts in the said UE acquisition current C oMP measuring assembly, for: said UE acquisition includes the CQI of the cooperation set of whole sub-districts in the current C oMP measuring assembly.

Wherein, the PMI that CQI is based on individual cell calculates, and the CQI value directly corresponding except that main Serving cell the channel quality between other sub-districts and the targeted customer.

Accordingly; The present invention also provides the feedback device of a kind of CQI; It is characterized in that said device comprises: first acquiring unit and first feedback unit, wherein; First acquiring unit, average CQI when cooperation is participated in the part sub-district in CQI when all cooperation is participated in sub-districts in the CQI when being used for obtaining current C oMP measuring assembly non tie up system, the current C oMP measuring assembly and the current C oMP measuring assembly; First feedback unit is used for the CQI that said first acquiring unit obtains is fed back to network side.

Wherein, said acquiring unit comprises first acquisition module, second acquisition module and the 3rd acquisition module, wherein, and first acquisition module, the CQI when being used for obtaining current C oMP measuring assembly non tie up system; Second acquisition module, the CQI when being used for obtaining the participation cooperation of the whole sub-districts of current C oMP measuring assembly; The 3rd acquisition module, average CQI when being used for obtaining current C oMP measuring assembly part sub-district and participating in cooperation.

Particularly, said the 3rd acquisition module specifically is used for, and obtains to include the CQI of each cooperation set of any two or more sub-districts in the current C oMP measuring assembly; According to CQI of resulting each cooperation set, obtain the mean value that institute comprises each identical cooperation set CQI of number of cells again, average CQI when obtaining the part sub-district and participating in cooperating.

Said second acquisition module specifically is used for, and said UE acquisition includes the CQI of the cooperation set of whole sub-districts in the current C oMP measuring assembly.

In addition, the present invention also provides the feedback method of a kind of CQI, and is as shown in Figure 2, and said method mainly comprises:

Step 201:UE obtain in the current C oMP measuring assembly each sub-district independently in CQI and the current C oMP measuring assembly except that main Serving cell all sub-districts to the interference mean value δ of self;

Step 202: said UE is with the CQI that obtains and disturb mean value δ to feed back to network side.

Wherein, Said UE obtains in the current C oMP measuring assembly independently CQI of each sub-district; Comprise: for any sub-district in the current C oMP measuring assembly; Said UE obtains the ratio of this sub-district to self available signal power and the outer interference plus noise power of current C oMP measuring assembly, obtains independently CQI of said sub-district; According to this acquisition methods, UE obtains independently CQI of interior all sub-districts of current C oMP measuring assembly.

Wherein, Said UE obtains said interference mean value δ; Comprise: said UE obtains in the current C oMP measuring assembly except that main Serving cell other each sub-districts respectively to the interference power of self; The ratio of the outer interference plus noise power to self of the interference power of each sub-district that obtains again being obtained and current C oMP measuring assembly obtains the mean value of resultant each ratio at last, obtains said interference mean value δ.

Here; Said UE obtains in the current C oMP measuring assembly except that main Serving cell other each sub-districts and arrives the interference power of self; Be specially: said UE records the channel gain of said each sub-district to self; Travel through then that all code words obtain the corresponding emission value of said channel gain among the R8 code book set C, and, obtain the interference power of said each sub-district UE according to measured channel gain and the emission value that obtains.

At said UE with the CQI that obtains and disturb after mean value δ feeds back to network side; Said method also comprises: network side is according to the CQI and disturb mean value δ independently of each sub-district in the current C oMP measuring assembly of said UE feedback, the CQI when cooperation is participated in the part sub-district in CQI when all cooperation is participated in sub-districts in the CQI when obtaining non tie up system in the current C oMP measuring assembly, the current C oMP measuring assembly and the current C oMP measuring assembly.

Relational expression between CQI when cooperation is participated in the CQI when particularly, network side at first obtains said non tie up system according to following mode, the CQI when cooperation is participated in whole sub-district and part sub-district and the CQI of said feedback and the interference mean value δ:

CQI in the time of will obtaining said non tie up system respectively, the ratio of the outer interference plus noise power to self of the interference power of needed interfered cell and current C oMP measuring assembly during CQI when cooperation was participated in CQI and part sub-district when all cooperation was participated in sub-districts are by the interference mean value δ replacement of said UE feedback;

CQI in the time of will obtaining said non tie up system respectively, the ratio of the outer interference plus noise power to self of the available signal power of needed each sub-district and current C oMP measuring assembly during CQI when cooperation was participated in CQI and part sub-district when all cooperation was participated in sub-districts are through the independently CQI replacement of each sub-district of said UE feedback;

Each sub-district independently CQI and the relational expression of disturbing mean value δ in the current C oMP measuring assembly of CQI and said UE feedback when obtaining said non tie up system respectively; Each sub-district independently CQI and the relational expression of disturbing mean value δ in the current C oMP measuring assembly of CQI and said UE feedback when all cooperation is participated in sub-districts, and each sub-district relational expression of CQI and interference mean value δ independently in the current C oMP measuring assembly that CQI and said UE feed back when participating in cooperation of part sub-district.

Then; Network side can be according to resultant each relational expression; By the CQI and disturb mean value δ independently of each sub-district in the current C oMP measuring assembly of said UE feedback, the CQI when cooperation is participated in the part sub-district in CQI when all cooperation is participated in sub-districts in the CQI when obtaining non tie up system in the current C oMP measuring assembly, the current C oMP measuring assembly and the current C oMP measuring assembly.

Accordingly; The present invention also provides the feedback device of a kind of CQI; It is characterized in that said device comprises: the second acquisition unit and second feedback unit, wherein; Second acquisition unit is used for obtaining each sub-district of current C oMP measuring assembly interference mean value δ that independently disturb said UE all sub-districts except that main Serving cell in CQI and the current C oMP measuring assembly; Second feedback unit, the CQI and the average interference value δ that are used for said second acquisition unit is obtained feed back to network side.

Wherein, said second acquisition unit comprises: the 4th acquisition module and the 5th acquisition module, and wherein, the 4th acquisition module is used for obtaining independently CQI of each sub-district of current C oMP measuring assembly; The 5th acquisition module is used for obtaining the interference mean value δ of current C oMP measuring assembly all sub-districts except that main Serving cell to said UE.

Particularly; Said the 4th acquisition module; Specifically be used for: for any sub-district in the current C oMP measuring assembly, obtain the ratio of this sub-district, obtain independently CQI of said sub-district to available signal power and the outer interference plus noise power of current C oMP measuring assembly of said UE; According to this acquisition methods, obtain independently CQI of interior all sub-districts of current C oMP measuring assembly.

Said the 5th acquisition module; Specifically be used for: obtain current C oMP measuring assembly other each sub-districts except that main Serving cell respectively and arrive the interference power of self; The ratio of the outer interference plus noise power to self of the interference power of each sub-district that obtains again being obtained and current C oMP measuring assembly; Obtain the mean value of resultant each ratio at last, obtain said interference mean value δ.

Said network side comprises the 3rd acquiring unit; Be used for according to each sub-district of current C oMP measuring assembly of said UE feedback CQI and disturb mean value δ independently the CQI when cooperation is participated in the part sub-district in CQI when all cooperation is participated in sub-districts in the CQI when obtaining non tie up system in the current C oMP measuring assembly, the current C oMP measuring assembly and the current C oMP measuring assembly.

The feedback device of the CQI that provides can be arranged among the UE among the present invention, also can have be connected independent to be provided with UE.

Embodiment one

In the present embodiment, the linear value that CQI is and Signal to Interference plus Noise Ratio (SINR, Signal to Interferenceplus Noise Ratio) is corresponding.

In the present embodiment, adopt single user's Combined Treatment (Intra-site SU JP, Intra-site singleuser Joint Processing) transport-type in the base station; As shown in Figure 3; The CoMP measuring assembly that network side is confirmed is made up of sub-district 1, sub-district 2 and sub-district 3, and wherein, sub-district 1 is the main Serving cell of UE; As shown in Figure 4, the cooperation set that this CoMP measuring assembly comprises has three kinds: the 1st kind is main Serving cell 1+ sub-district 2; The 2nd kind is main Serving cell 1+ sub-district 3; The 3rd kind is 2+ sub-district, main Serving cell 1+ sub-district 3.Wherein, when the cooperation set was main Serving cell 1+ sub-district 2, main Serving cell 1 was the UE service jointly with sub-district 2; Sub-district 3 is the interfered cell of UE; When the cooperation set was main Serving cell 1+ sub-district 3, main Serving cell 1 was the UE service jointly with sub-district 3, and sub-district 2 is the interfered cell of UE; When cooperation set was 2+ sub-district 3, main Serving cell 1+ sub-district, main Serving cell 1, sub-district 2 and sub-district 3 are common to be served for UE.

The CQI under the non tie up system is calculated in each cooperation set that step 1:UE is enumerated according to Fig. 4 respectively _Non-comp, behind the 1st kind of cooperation set and the 2nd kind of cooperation ensemble average

And the CQI of the 3rd kind of cooperation set _{1,2,3, JP}

At first, UE calculates the CQI under the non tie up system, promptly calculates the CQI when having only main Serving cell 1 to serve for UE _Non-compHere; UE calculates main Serving cell 1 to the power of the useful signal of self and all interference powers and the noise sum of current UE; Calculate the ratio of said available signal power and said all interference powers and noise sum again, the CQI when obtaining having only main Serving cell 1 to serve for UE _Non-compWherein, all interference powers of current UE and noise sum are specially: in the current C oMP measuring assembly except that main Serving cell each sub-district to the interference power of UE, with current C oMP measuring assembly interference power plus noise outward and.

Particularly, UE is (1) according to the following equation, the CQI when calculating non tie up system _Non-comp,

${\mathrm{CQI}}_{\mathrm{non}-\mathrm{comp}}=\frac{{\left|\right|H_1{\mathrm{<figure-callout\; id="1"\; label="W"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">W</figure-callout>}}_1\left|\right|}^2{P}_1^t}{I+N+P_2^r+P_3^r}---\left(1\right)$

Wherein, the power of the useful signal that receives for UE of molecule

;

is the transmitting power of main Serving cell 1 to UE; I is the outer interference power of current C oMP measuring assembly; N is a white Gaussian noise power;

is the interference power of the 2 couples of UE in sub-district in the current C oMP measuring assembly, be the interference power of the 3 couples of UE in sub-district in the current C oMP measuring assembly.Here, H ₁, All can be measured by UE, concrete method of measurement is this area common technology, repeats no more at this.

Secondly, the various cooperations set that UE is enumerated according to Fig. 4 are calculated respectively under the JP situation, and the 1st, 2, the CQI during 3 kind of cooperation set.

Particularly, UE is (2) according to the following equation, calculate cooperation and gather the CQI when being main Serving cell 1+ sub-district 2 _{1,2, JP}, (3) calculate to cooperate and gather the CQI when being main Serving cell 1+ sub-district 3 according to the following equation _{1,3, JP}, (4) calculate to cooperate and gather the CQI when being 2+ sub-district 3, main Serving cell 1+ sub-district according to the following equation _{1,2,3, JP}

${\mathrm{<figure-callout\; id="1"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">\; <figure-callout\; id="2"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000031.png"\; state="\{\{state\}\}">CQI</figure-callout>\; </figure-callout>}}_{\mathrm{1,2},\mathrm{JP}}=\frac{{\left|\right|H_1{\mathrm{<figure-callout\; id="1"\; label="W"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">W</figure-callout>}}_1\left|\right|}^2{P}_1^t+{\left|\right|H_2{\mathrm{<figure-callout\; id="2"\; label="W"\; filenames="HDA0000036366460000022.png,HDA0000036366460000031.png"\; state="\{\{state\}\}">W</figure-callout>}}_2\left|\right|}^2{P}_2^t}{{\left|\right|H_3{\mathrm{<figure-callout\; id="3"\; label="F"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">F</figure-callout>}}_3\left|\right|}^2{P}_3^t+I+N}=\frac{{\left|\right|H_1{\mathrm{<figure-callout\; id="1"\; label="W"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">W</figure-callout>}}_1\left|\right|}^2{P}_1^t+{\left|\right|H_2{\mathrm{<figure-callout\; id="2"\; label="W"\; filenames="HDA0000036366460000022.png,HDA0000036366460000031.png"\; state="\{\{state\}\}">W</figure-callout>}}_2\left|\right|}^2{P}_2^t}{\underset{w\&Element;C}{E}\left[{\left|\right|H_{3}w\left|\right|}^2\right]P_3^t+I+N}---\left(2\right)$

${\mathrm{<figure-callout\; id="1"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">\; <figure-callout\; id="3"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">CQI</figure-callout>\; </figure-callout>}}_{1,3,\mathrm{JP}}=\frac{{\left|\right|H_1{\mathrm{<figure-callout\; id="1"\; label="W"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">W</figure-callout>}}_1\left|\right|}^2{P}_1^t+{\left|\right|H_3{\mathrm{<figure-callout\; id="3"\; label="W"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">W</figure-callout>}}_3\left|\right|}^2{P}_3^t}{{\left|\right|H_2{\mathrm{<figure-callout\; id="2"\; label="F"\; filenames="HDA0000036366460000022.png,HDA0000036366460000031.png"\; state="\{\{state\}\}">F</figure-callout>}}_2\left|\right|}^2{P}_2^t+I+N}=\frac{{\left|\right|H_1{\mathrm{<figure-callout\; id="1"\; label="W"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">W</figure-callout>}}_1\left|\right|}^2{P}_1^t+{\left|\right|H_3{\mathrm{<figure-callout\; id="3"\; label="W"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">W</figure-callout>}}_3\left|\right|}^2{P}_3^t}{\underset{w\&Element;C}{E}\left[{\left|\right|H_{2}w\left|\right|}^2\right]P_2^t+I+N}---\left(3\right)$

${\mathrm{<figure-callout\; id="1"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">\; <figure-callout\; id="2"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000031.png"\; state="\{\{state\}\}">\; <figure-callout\; id="3"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">CQI</figure-callout>\; </figure-callout>\; </figure-callout>}}_{\mathrm{1,2,3},\mathrm{JP}}=\frac{{\left|\right|H_1{\mathrm{<figure-callout\; id="1"\; label="W"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">W</figure-callout>}}_1\left|\right|}^2{P}_1^t+{\left|\right|H_2{\mathrm{<figure-callout\; id="2"\; label="W"\; filenames="HDA0000036366460000022.png,HDA0000036366460000031.png"\; state="\{\{state\}\}">W</figure-callout>}}_2\left|\right|}^2{P}_2^t+{\left|\right|H_3{\mathrm{<figure-callout\; id="3"\; label="W"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">W</figure-callout>}}_3\left|\right|}^2{P}_3^t}{I+N}---\left(4\right)$

Wherein,

is the transient transmission power of sub-district 2 to UE,

be the transient transmission power of sub-district 3 to UE.

Wherein, H ₁, H ₂, H ₃Be respectively the channel gain of sub-district 1, sub-district 2, sub-district 3 to UE, W ₁, W ₂, W ₃Be respectively the service-user emission value of sub-district 1, sub-district 2, sub-district 3 to UE.

Here, service-user emission value W ₁Be that UE obtains channel gain H according to cell special reference (CRS, Cell-specficReference Signal) ₁, again to this channel gain H ₁Matrix carries out the best emission value that obtains after the singular value decomposition (SVD, Singular Value Decomposition).The service-user emission value W of other any one sub-districts in the current C oMP measuring assembly except that main Serving cell _iBe PMI _i, UE can be according to the channel gain H of this sub-district that measures to UE _iThe right singular matrix that matrix carries out obtaining behind the SVD quantizes to obtain PMI _iUnder the JP situation, resulting PMI is optimum pairing pre-coding matrix indication (BCI, best companion PMI).In the present embodiment, difference calculation plot 2, sub-district 3 be PMI independently, obtains corresponding service-user emission value W ₂, W ₃

Wherein, F ₂, F ₃Be respectively the interference user emission value of sub-district 2 and sub-district 3 to UE,

The interference power of difference sub-district 2, the 3 couples of UE in sub-district.Here, the interference user emission value F of any sub-district of other except that main Serving cell _iBe by the channel gain H ' of the interference UE measurement cell 2 that is positioned at sub-district 2 to self _iObtain, therefore, said UE can't obtain F _i

In the present embodiment, when any sub-district is the interfered cell of UE except that main Serving cell in the current C oMP measuring assembly, this sub-district to the interference power of UE by

Obtain, that is, UE records the channel gain H of said interfered cell to self _i, travel through then that all code words obtain channel gain H among the R8 code book set C _iCorresponding emission value w, and calculating channel gain H _iWith the mould of the emission value w product that obtains square, with the transient transmission power of said interfered cell to UE

Product, obtain the interference power of said interfered cell to UE.Wherein, UE utilizes channel state information reference signals (CSI-RS, Channel StateInformation Reference Signal) to record channel gain H _i

Here;

is the interference power of the 2 couples of UE in sub-district, and

is the interference power of the 3 couples of UE in sub-district.

Wherein, the outer interference power of current C oMP measuring assembly comprises the power N+I of the interference plus noise that current C oMP measuring assembly is outer, can calculate according to following formula (5).

$I+N\&ap;I+N+P_2^r+P_3^r-\left(\underset{w\&Element;C}{E}\right[{\left|\right|H_{2}w\left|\right|}^2]P_2^t+\underset{w\&Element;C}{E}[{\left|\right|H_{3}w\left|\right|}^2\left]P_3^t\right)---\left(5\right)$

Particularly, UE cuts in the current C oMP measuring assembly except that main Serving cell each sub-district and obtains interference plus noise power N+I outside the current C oMP measuring assembly to the interference power sum

of UE is approximate in the total interference power that records .

In addition, the outer interference plus noise power N+I of current C oMP measuring assembly also can directly be measured under this local resource element of other local resource pieces placements CSI-RS position is mourned in silence (CSI-RS muting) situation by UE.

At last, enumerate to Fig. 4, all add two kinds of cooperation set that a sub-district forms by main Serving cell, UE calculates these the two kinds cooperation set mean values of CQI down.

Particularly, shown in following formula (6), calculate cooperation and gather the CQI when being main Serving cell 1+ sub-district 2 _{1,2, JP}CQI when being main Serving cell 1+ sub-district 3 with the cooperation set _{1,3, JP}Mean value, obtain

$\stackrel{\&OverBar;}{\mathrm{CQI}}=({\mathrm{<figure-callout\; id="1"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">\; <figure-callout\; id="2"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000031.png"\; state="\{\{state\}\}">CQI</figure-callout>\; </figure-callout>}}_{\mathrm{1,2},\mathrm{JP}}+{\mathrm{<figure-callout\; id="1"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">\; <figure-callout\; id="3"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">CQI</figure-callout>\; </figure-callout>}}_{\mathrm{1,3},\mathrm{JP}})/2---\left(6\right)$

Here, no matter the cooperation of confirming afterwards set is that afterwards, UE uses when network side feedback CQI by sub-district 1 and sub-district 2 cooperations or sub-district 1 and sub-district 3 cooperations

Replace feedback CQI _{1,2, JP}And CQI _{1,3, JP}, so, under the prerequisite that guarantees feedback accuracy, also can reduce feedback quantity.

Step 2:UE is with the CQI that calculates _Non-comp,

CQI _{1,2,3, JP}And other channel quality parameter feeds back to network side through PUSCH together.

Here, other channel quality parameter can comprise: each sub-district PMI independently in PCI (phase correction factor), RI and the said CoMP measuring assembly.

Particularly, in the present embodiment, UE is as shown in Figure 5 to the channel quality parameter of network side feedback, comprises the CQ that calculates _Inon-comp,

CQI _{1,2,3, JP}, sub-district 1 PMI ₁, sub-district 2 PNI ₂, sub-district 3 PMI ₃, PCI and RI.Here,

CQI _{1,2,3, JP}Equal corresponding JP.

Step 3: network side is finally confirmed the sub-district of actual participation cooperation according to the channel quality parameter of UE feedback, obtains the cooperation set of under the JP situation UE being used.

Particularly; Network side is confirmed the cooperation set of a suggestion according to the channel quality parameter of UE feedback and current scheduling situation, and the cooperation request is sent in each sub-district in this cooperation set; Afterwards; Network side is again according to the situation of replying of each sub-district, the sub-district of the actual participation cooperation of confirming under the final JP situation UE to be used, and the set that the sub-district of the definite actual participation cooperation of institute is formed is the cooperation of under the JP situation UE being used and gathers.

Embodiment two

In the present embodiment; Adopt cooperative scheduling/cooperative beam figuration (Intra-site CS/CB) transport-type in the base station between network side and the UE; As shown in Figure 6, the determined CoMP measuring assembly of network side is made up of sub-district 1, sub-district 2 and sub-district 3, wherein; Sub-district 1 is the main Serving cell of UE, and cooperation set and the foregoing description one that this CoMP measuring assembly comprises are identical.

The CQI under the non tie up system is calculated in each cooperation set that step 1:UE is enumerated according to Fig. 4 respectively _Non-comp, behind the 1st kind of cooperation set and the 2nd kind of cooperation ensemble average

And the CQI of the 3rd kind of cooperation set _{1,2,3, CB}

At first, UE calculates the CQI under the non tie up system, promptly calculates the CQI when having only main Serving cell 1 to serve for UE _Non-comp, detailed process and embodiment one calculate CQI _Non-compProcess identical.

Secondly, UE is enumerated various cooperations set according to Fig. 4, calculates under the CS/CB situation the 1st, 2, the CQI during 3 kind of cooperation set respectively.

Particularly, UE is (7) according to the following equation, calculate cooperation and gather the CQI when being main Serving cell 1+ sub-district 2 _{1,2, CB}, (8) calculate to cooperate and gather the CQI when being main Serving cell 1+ sub-district 3 according to the following equation _{1,3, CB}, (9) calculate to cooperate and gather the CQI when being 2+ sub-district 3, main Serving cell 1+ sub-district according to the following equation _{1,2,3, CB},

${\mathrm{<figure-callout\; id="1"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">\; <figure-callout\; id="2"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000031.png"\; state="\{\{state\}\}">CQI</figure-callout>\; </figure-callout>}}_{\mathrm{1,2},\mathrm{CB}}=\frac{{\left|\right|H_1{\mathrm{<figure-callout\; id="1"\; label="W"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">W</figure-callout>}}_1\left|\right|}^2{P}_1^t}{{\left|\right|H_2{\mathrm{<figure-callout\; id="2"\; label="W"\; filenames="HDA0000036366460000022.png,HDA0000036366460000031.png"\; state="\{\{state\}\}">W</figure-callout>}}_2\left|\right|}^2{P}_2^t+\underset{w\&Element;C}{E}\left[{\left|\right|H_{3}w\left|\right|}^2\right]P_3^t+I+N}---\left(7\right)$

${\mathrm{<figure-callout\; id="1"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">\; <figure-callout\; id="3"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">CQI</figure-callout>\; </figure-callout>}}_{\mathrm{1,3},\mathrm{CB}}=\frac{{\left|\right|H_1{\mathrm{<figure-callout\; id="1"\; label="W"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">W</figure-callout>}}_1\left|\right|}^2{P}_1^t}{\underset{w\&Element;C}{E}\left[{\left|\right|H_{2}w\left|\right|}^2\right]P_2^t+{\left|\right|H_3{\mathrm{<figure-callout\; id="3"\; label="W"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">W</figure-callout>}}_3\left|\right|}^2{P}_3^t+I+N}---\left(8\right)$

${\mathrm{<figure-callout\; id="1"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">\; <figure-callout\; id="2"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000031.png"\; state="\{\{state\}\}">\; <figure-callout\; id="3"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">CQI</figure-callout>\; </figure-callout>\; </figure-callout>}}_{\mathrm{1,2,3},\mathrm{CB}}=\frac{{\left|\right|H_1{\mathrm{<figure-callout\; id="1"\; label="W"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">W</figure-callout>}}_1\left|\right|}^2{P}_1^t}{{\left|\right|H_2{\mathrm{<figure-callout\; id="2"\; label="W"\; filenames="HDA0000036366460000022.png,HDA0000036366460000031.png"\; state="\{\{state\}\}">W</figure-callout>}}_2\left|\right|}^2{P}_2^t+{\left|\right|H_3{\mathrm{<figure-callout\; id="3"\; label="W"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">W</figure-callout>}}_3\left|\right|}^2{P}_3^t+I+N}---\left(9\right)$

Wherein, in the present embodiment, obtain independently PMI of sub-district 1, sub-district 2 and sub-district 3 respectively, obtain corresponding service-user emission value W ₁, W ₂, W ₃In the current C oMP measuring assembly except that main Serving cell the service-user emission value W of other any sub-districts _iBe PMI _i, UE can be according to this sub-district that measures to UE channel gain H _iThe right singular matrix that matrix carries out obtaining after SVD decomposes or right singular matrix got quadrature after quantize to obtain PMI _iUnder the CS/CB situation, resulting PMI is the poorest pairing pre-coding matrix indication (WCI, worst companion PMI).

Particularly, the emission value W of sub-district 2 ₂Be channel gain H to sub-district 2 to UE ₂Carrying out SVD decomposes and to obtain right singular matrix and get the WCI that quantizes to obtain behind the quadrature ₂, in like manner, the emission value W of sub-district 3 ₃Be channel gain H to sub-district 3 to UE ₃Carrying out SVD decomposes the right singular matrix obtain and gets the WCI that quantizes to obtain behind the quadrature ₃

In the present embodiment;

is the interference power of the 2 couples of UE in sub-district;

is the interference power of the 3 couples of UE in sub-district, and computational methods and embodiment one are identical.

Wherein, the outer interference power of current C oMP measuring assembly comprises the power N+I of the interference plus noise that current C oMP measuring assembly is outer, and computational methods are with identical with embodiment one.

Under the CS/CB situation, calculate CQI _{1,2, CB}The time, the cooperation set is main Serving cell 1+ sub-district 2, with the signal power of sub-district 2 for the UE service

As the interference of the 2 couples of UE in sub-district, in like manner, calculate CQI _{1,3, CB}The time, the cooperation set is main Serving cell 1+ sub-district 3, with the signal power of sub-district 3 to UE

As the interference of the 3 couples of UE in sub-district, calculate CQI _{1,2,3, CB}The time, the cooperation set is 2+ sub-district, main Serving cell 1+ sub-district 3, with the signal power of sub-district 2, sub-district 3 to UE

Respectively as the interference of sub-district 2, the 3 couples of UE in sub-district.

At last, enumerate to Fig. 4, all be to add two kinds of sub-district cooperation set by main Serving cell, UE calculates the mean value of these two kinds cooperation set CQI under the CS/CB situation.

Particularly, shown in following formula (10), calculate cooperation and gather the CQI when being main Serving cell 1+ sub-district 2 _{1,2, CB}CQI when being main Serving cell 1+ sub-district 3 with the cooperation set _{1,3, CB}Mean value, obtain

$\stackrel{\&OverBar;}{\mathrm{CQI}}=({\mathrm{<figure-callout\; id="1"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">\; <figure-callout\; id="2"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000031.png"\; state="\{\{state\}\}">CQI</figure-callout>\; </figure-callout>}}_{\mathrm{1,2},\mathrm{CB}}+{\mathrm{<figure-callout\; id="1"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">\; <figure-callout\; id="3"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">CQI</figure-callout>\; </figure-callout>}}_{\mathrm{1,3},\mathrm{CB}})/2---\left(10\right)$

Step 2:UE is with the CQI that calculates _Non-comp, CQI _{1,2,3, CB}And other channel quality parameter feeds back to network side through PUSCH together;

Here, other channel quality parameter can comprise: each sub-district PMI independently in RI and the said CoMP measuring assembly.

Particularly, in the present embodiment, UE is as shown in Figure 7 to the channel quality parameter of network side feedback, comprises the CQI that calculates _Non-comp,

CQI _{1,2,3, CB}, sub-district 1 PMI ₁, sub-district 2 PMI ₂, sub-district 3 PMI ₃, and RI, here,

CQI _{1,2,3, CB}Equal corresponding CS/CB.

Step 3: network side is finally confirmed the sub-district of actual participation cooperation according to the channel quality parameter of UE feedback, obtains the cooperation set of under the CS/CB situation UE being used.

Particularly; Network side is confirmed the cooperation set of a suggestion according to the channel quality parameter of UE feedback and current scheduling situation, and the cooperation request is sent in each sub-district in this cooperation set; Afterwards; Network side is again according to the situation of replying of each sub-district in the cooperation set, the sub-district of the actual participation cooperation of confirming under the final CS/CB situation UE to be used, and the set that the sub-district of the definite actual participation cooperation of institute is formed is the cooperation of under the CS/CB situation UE being used and gathers.

Embodiment three

In the explanation below, each sub-district independently CQI is the linear value corresponding with SINR.

In the present embodiment; Adopt Intra-site SU JP transport-type, the CoMP measuring assembly that network side is confirmed is made up of sub-district 1, sub-district 2 and sub-district 3, and is specifically as shown in Figure 3; Wherein, Sub-district 1 is the main Serving cell of UE, and three kinds of cooperation set that this CoMP measuring assembly comprises are as shown in Figure 4, and are identical with embodiment one.

Step 1:UE calculates each sub-district in the current C oMP measuring assembly independently CQI and the interference mean value δ that disturbs UE all sub-districts except that main Serving cell respectively.

At first, UE calculates independently CQI of sub-district 1 respectively ₁, sub-district 2 CQI independently ₂With sub-district 3 CQI independently ₃Here, for any sub-district, UE calculates this sub-district to the power of the subscriber signal of said UE service and the ratio of the interference plus noise power outside the current C oMP measuring assembly, obtains independently CQI of this sub-district.

Particularly, according to formula (11), UE calculates independently CQI of sub-district 1 respectively ₁, sub-district 2 CQI independently ₂With sub-district 3 CQI independently ₃

${\mathrm{<figure-callout\; id="1"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">CQI</figure-callout>}}_1=\frac{{\left|\right|H_1{\mathrm{<figure-callout\; id="1"\; label="W"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">W</figure-callout>}}_1\left|\right|}^2{P}_1^t}{I+N},{\mathrm{<figure-callout\; id="2"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000031.png"\; state="\{\{state\}\}">CQI</figure-callout>}}_2=\frac{{\left|\right|H_2{\mathrm{<figure-callout\; id="2"\; label="W"\; filenames="HDA0000036366460000022.png,HDA0000036366460000031.png"\; state="\{\{state\}\}">W</figure-callout>}}_2\left|\right|}^2{P}_2^t}{I+N},{\mathrm{<figure-callout\; id="3"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">CQI</figure-callout>}}_3=\frac{{\left|\right|H_3{\mathrm{<figure-callout\; id="3"\; label="W"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">W</figure-callout>}}_3\left|\right|}^2{P}_3^t}{I+N}---\left(11\right)$

Wherein,

representes the available signal power that sub-district 1, sub-district 2, sub-district 3 are served for UE respectively, and the interference plus noise power 1+N computational methods outside the current C oMP measuring assembly are identical with embodiment one.

Secondly, UE calculates the interference mean value δ that disturb UE all sub-districts except that main Serving cell in the current C oMP measuring assembly.

Particularly; In the present embodiment; All sub-districts in the current C oMP measuring assembly except that main Serving cell comprise sub-district 2 and sub-district 3; According to formula (12); UE respectively calculation plot 2 calculates the resulting mean value of two ratios of corresponding these two sub-districts respectively to the ratio

of the outer interference plus noise power of self interference power and current C oMP measuring assembly and sub-district 3 to the ratio

of self interference power and current C oMP measuring assembly interference plus noise power outward again, obtains said interference mean value δ.

$\mathrm{\&delta;}=\left(\frac{\underset{W\&Element;C}{E}\left[{\left|\right|H_{2}w\left|\right|}^2\right]P_2^t+\underset{W\&Element;C}{E}\left[{\left|\right|H_{3}w\left|\right|}^2\right]P_3^t}{I+N}\right)/2---\left(12\right)$

Wherein, In the formula (12); is the transient transmission power of sub-district 2 to UE;

is the transient transmission power of sub-district 3 to UE; Identical among the computational methods of the interference power

of the interference power of sub-district 2

sub-district 3 and the embodiment one, repeat no more at this.

UE can feed back the CQI of sub-district 1 when network side feedback CQI ₁, sub-district 2 CQI ₂, sub-district 3 CQI ₃And δ, replace feeding back the CQI of sub-district 1 ₁, sub-district 2 CQI ₂, sub-district 3 CQI ₃, CQI _{1,2, JP}, CQI _{1,3, JP}And CQI _{1,2,3, JP}, so, under the prerequisite that guarantees feedback accuracy, also can reduce feedback quantity.Afterwards, when can using interference mean value δ to replace sub-district 2 or sub-district 3 as interfered cell, network side, calculates CQI to the interference power of UE _{1,2, JP}, CQI _{1,3, JP}

Interference mean value δ to obtaining quantizes according to the method that SINR is quantized into CQI, needs the feedback overhead of 4bit.Particularly, δ is quantized into 16 grades, the corresponding different CQI sequence numbers of these 16 grades, detailed process is this area common technology means, repeats no more at this.

Step 2:UE is with the CQI that calculates ₁, CQI ₂, CQI ₃And δ, feed back to network side with other channel quality parameter;

Here, identical among other channel quality parameter and the embodiment one.

Particularly, in the present embodiment, UE is as shown in Figure 8 to the channel quality parameter of network side feedback, comprises the CQI that calculates ₁, CQI ₂, CQI ₃, δ, sub-district 1 PMI ₁, sub-district 2 PMI ₂, sub-district 3 PMI ₃, PCI and RI.

Step 3: network side is according to the CQI of UE feedback ₁, CQI ₂, CQI ₃, δ, obtain CQI and the CQI under the non tie up system under the concrete JP cooperation mode.

Particularly, according to formula (13)～(16), network side is according to the CQI of UE feedback ₁, CQI ₂, CQI ₃, δ, calculating the cooperation set CQI when being main Serving cell 1+ sub-district 2 _{1,2, JP}, the CQI when cooperation set is main Serving cell 1+ sub-district 3 _{1,3, JP}, the CQI when cooperation set is 2+ sub-district 3, main Serving cell 1+ sub-district _{1,2,3, JP}, and non tie up system under CQI _Non-comp

${\mathrm{<figure-callout\; id="1"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">\; <figure-callout\; id="2"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000031.png"\; state="\{\{state\}\}">CQI</figure-callout>\; </figure-callout>}}_{\mathrm{1,2},\mathrm{JP}}=\frac{{\left|\right|H_1{\mathrm{<figure-callout\; id="1"\; label="W"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">W</figure-callout>}}_1\left|\right|}^2{P}_1^t+{\mathrm{\&rho;}}_1^2{\left|\right|H_2{\mathrm{<figure-callout\; id="2"\; label="W"\; filenames="HDA0000036366460000022.png,HDA0000036366460000031.png"\; state="\{\{state\}\}">W</figure-callout>}}_2\left|\right|}^2{P}_2^t}{{\left|\right|H_3{\mathrm{<figure-callout\; id="3"\; label="F"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">F</figure-callout>}}_3\left|\right|}^2{P}_3^t+I+N}=\frac{\frac{{\left|\right|H_1{\mathrm{<figure-callout\; id="1"\; label="W"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">W</figure-callout>}}_1\left|\right|}^2}{I+N}{P}_1^t+{\mathrm{\&rho;}}_1^2\frac{{\left|\right|H_2{\mathrm{<figure-callout\; id="2"\; label="W"\; filenames="HDA0000036366460000022.png,HDA0000036366460000031.png"\; state="\{\{state\}\}">W</figure-callout>}}_2\left|\right|}^2}{I+N}{P}_2^t}{\frac{{\left|\right|H_3{\mathrm{<figure-callout\; id="3"\; label="F"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">F</figure-callout>}}_3\left|\right|}^2{P}_3^t}{I+N}+1}\&ap;\frac{{\mathrm{<figure-callout\; id="1"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">CQI</figure-callout>}}_1+{\mathrm{\&rho;}}_1^2{\mathrm{CQI}}_2}{\frac{\underset{W\&Element;C}{E}[{\left|\right|H_{3}w\left|\right|}^2{P}_3^t}{I+N}+1}\&ap;\frac{{\mathrm{<figure-callout\; id="1"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">CQI</figure-callout>}}_1+{\mathrm{\&rho;}}_1^2{\mathrm{<figure-callout\; id="2"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000031.png"\; state="\{\{state\}\}">CQI</figure-callout>}}_2}{\mathrm{\&delta;}+1}---\left(13\right)$

${\mathrm{<figure-callout\; id="1"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">\; <figure-callout\; id="3"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">CQI</figure-callout>\; </figure-callout>}}_{1,3,\mathrm{JP}}=\frac{{\left|\right|H_1{\mathrm{<figure-callout\; id="1"\; label="W"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">W</figure-callout>}}_1\left|\right|}^2{P}_1^t+{\mathrm{\&rho;}}_2^2{\left|\right|H_3{\mathrm{<figure-callout\; id="3"\; label="W"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">W</figure-callout>}}_3\left|\right|}^2{P}_3^t}{{\left|\right|H_2{\mathrm{<figure-callout\; id="2"\; label="F"\; filenames="HDA0000036366460000022.png,HDA0000036366460000031.png"\; state="\{\{state\}\}">F</figure-callout>}}_2\left|\right|}^2{P}_2^t+I+N}\&ap;\frac{\frac{{\left|\right|H_1{\mathrm{<figure-callout\; id="1"\; label="W"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">W</figure-callout>}}_1\left|\right|}^2}{I+N}{P}_1^t+{\mathrm{\&rho;}}_2^2\frac{{\left|\right|H_3{\mathrm{<figure-callout\; id="3"\; label="W"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">W</figure-callout>}}_3\left|\right|}^2}{I+N}{P}_3^t}{\mathrm{\&delta;}+1}=\frac{{\mathrm{<figure-callout\; id="1"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">CQI</figure-callout>}}_1+{\mathrm{\&rho;}}_2^2{\mathrm{<figure-callout\; id="3"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">CQI</figure-callout>}}_3}{\mathrm{\&delta;}+1}---\left(14\right)$

${\mathrm{<figure-callout\; id="1"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">\; <figure-callout\; id="2"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000031.png"\; state="\{\{state\}\}">\; <figure-callout\; id="3"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">CQI</figure-callout>\; </figure-callout>\; </figure-callout>}}_{\mathrm{1,2,3},\mathrm{JP}}=\frac{{\left|\right|H_1{\mathrm{<figure-callout\; id="1"\; label="W"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">W</figure-callout>}}_1\left|\right|}^2{P}_1^t+{\mathrm{\&rho;}}_1^2{\left|\right|H_2{\mathrm{<figure-callout\; id="2"\; label="W"\; filenames="HDA0000036366460000022.png,HDA0000036366460000031.png"\; state="\{\{state\}\}">W</figure-callout>}}_2\left|\right|}^2{P}_2^t+{\mathrm{\&rho;}}_2^2{\left|\right|H_3{\mathrm{<figure-callout\; id="3"\; label="W"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">W</figure-callout>}}_3\left|\right|}^2{P}_3^t}{I+N}={\mathrm{<figure-callout\; id="1"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">CQI</figure-callout>}}_1+{\mathrm{\&rho;}}_1^2{\mathrm{<figure-callout\; id="2"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000031.png"\; state="\{\{state\}\}">CQI</figure-callout>}}_2+{\mathrm{\&rho;}}_2^2{\mathrm{CQI}}_3---\left(15\right)$

${\mathrm{CQI}}_{\mathrm{non}-\mathrm{comp}}=\frac{{\left|\right|H_1{\mathrm{<figure-callout\; id="1"\; label="W"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">W</figure-callout>}}_1\left|\right|}^2{P}_1^t}{{\left|\right|H_2{\mathrm{<figure-callout\; id="2"\; label="F"\; filenames="HDA0000036366460000022.png,HDA0000036366460000031.png"\; state="\{\{state\}\}">F</figure-callout>}}_2\left|\right|}^2{P}_2^t+{\left|\right|H_3{\mathrm{<figure-callout\; id="3"\; label="F"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">F</figure-callout>}}_3\left|\right|}^2{P}_3^t+I+N}=\frac{{\mathrm{<figure-callout\; id="1"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">CQI</figure-callout>}}_1}{2\&times;\mathrm{\&delta;}+1}---\left(16\right)$

Wherein, when the cooperation set was main Serving cell 1+ sub-district 2, sub-district 3 was the interfered cell of UE, calculated CQI _{1,2, JP}The time, pass through in the formula (13) to use

Replace

Obtain the interference power of the 3 couples of UE in sub-district; Again with the interference power of the 3 couples of UE in sub-district

Ratio with the outer interference plus noise power I+N of current C oMP set

Interference mean value δ with UE fed back replaces; With the available signal power of the 1 pair of UE service in sub-district and the ratio of the outer interference plus noise power I+N of current C oMP set

CQI with the sub-district 1 that UE fed back ₁Replace the ratio of the available signal power of the 2 pairs of UE services in sub-district and the outer interference plus noise power I+N of current C oMP set

CQI with the sub-district 2 that UE fed back ₂Replace, obtain relational expression

In like manner, the derivation of formula (14)～(16) and formula (13) are similar, repeat no more at this.So, network side only need be according to the CQI of the sub-district 1 of UE feedback ₁, sub-district 2 CQI ₂, sub-district 3 CQI ₃, and disturb mean value δ, just can access CQI _{1,2, JP}, CQI _{1,3, JP}, CQI _{1,2,3, JP}, CQI _Non-comp

In like manner; For any cell i; Its interference power to UE can be used

perhaps

represent; The value approximately equal that both calculate; In embodiment one, detailed description is arranged, repeat no more at this.

Wherein, ρ _iBe the PMI that confirm to use at last of network side with the PMI of UE feedback between coefficient correlation, calculate according to the PMI that the last PMI that confirms to use and UE feed back by network side.Under the JP situation, coefficient correlation ρ _iLevel off to 1.In the present embodiment, ρ ₁, ρ ₂Be the PMI of network side according to the sub-district 1 of PMI that self confirms at last to use and UE feedback ₁, sub-district 2 PMI ₂, sub-district 3 PMI ₃Calculate.

Step 4: network side confirms UE is used the cooperation set of JP according to CQI under the various cooperation modes of concrete JP that calculate and the CQI under the non tie up system.

Particularly; Network side is according to CQI and CQI under the non tie up system and current scheduling situation under the various cooperation modes of concrete JP that calculate; Confirm the cooperation set of a suggestion; And cooperation is sent in each sub-district in this cooperation set ask; Afterwards, the sub-district of the actual participation cooperation that network side is confirmed under the final JP situation UE to be used according to the situation of replying of each sub-district in the cooperation set again, the set that the sub-district of the definite actual participation cooperation of institute is formed is the cooperation of under the JP situation UE being used and gathers.

Particularly, network side is according to the CQI of UE feedback ₁, CQI ₂, CQI ₃, δ, and the CQI that calculates _{1,2, JP}, CQI _{1,3, JP}, CQI _{1,2,3, JP}, and CQI _Non-comp, confirm UE is used the cooperation set of JP.

Embodiment four

In the present embodiment; Adopt Intra-site CS/CB transport-type, the CoMP measuring assembly that network side is confirmed is made up of sub-district 1, sub-district 2 and sub-district 3, and is specifically as shown in Figure 6; Wherein, Sub-district 1 is the main Serving cell of UE, and three kinds of cooperation set that this CoMP measuring assembly comprises are as shown in Figure 4, with identical among the embodiment one.

Step 1: identical with the step 1 among the embodiment three.

Step 2:UE is with the CQI that calculates ₁, CQI ₂, CQI ₃And δ, feed back to network side with other channel quality parameter;

Here, identical among other channel quality parameter and the embodiment two.

Particularly, in the present embodiment, UE is as shown in Figure 9 to the channel quality parameter of network side feedback, comprises the CQI that calculates ₁, CQI ₂, CQI ₃, δ, sub-district 1 PMI ₁, sub-district 2 PMI ₂, sub-district 3 PMI ₃, and RI.

Step 3: network side is according to the CQI of UE feedback ₁, CQI ₂, CQI ₃, δ, obtain CQI and the CQI under the non tie up system under the concrete CS/CB cooperation mode.

Particularly, according to formula (17)～(20), network side is according to the CQI of UE feedback ₁, CQI ₂, CQI ₃, CQI _δ, calculate cooperation and gather the CQI when being main Serving cell 1+ sub-district 2 _{1,2, CB}, the CQI when cooperation set is main Serving cell 1+ sub-district 3 _{1,3, CB}, the CQI when cooperation set is 2+ sub-district 3, main Serving cell 1+ sub-district _{1,2,3, CB}, and non tie up system under CQI _Non-comp

${\mathrm{<figure-callout\; id="1"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">\; <figure-callout\; id="2"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000031.png"\; state="\{\{state\}\}">\; <figure-callout\; id="3"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">CQI</figure-callout>\; </figure-callout>\; </figure-callout>}}_{\mathrm{1,2,3},\mathrm{CB}}=\frac{{\left|\right|H_1{\mathrm{<figure-callout\; id="1"\; label="W"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">W</figure-callout>}}_1\left|\right|}^2{P}_1^t}{{\mathrm{\&rho;}}_1^2{\left|\right|H_2{\mathrm{<figure-callout\; id="2"\; label="F"\; filenames="HDA0000036366460000022.png,HDA0000036366460000031.png"\; state="\{\{state\}\}">F</figure-callout>}}_2\left|\right|}^2{P}_2^t+{{\mathrm{\&rho;}}_2^2\left|\right|H_3{\mathrm{<figure-callout\; id="3"\; label="F"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">F</figure-callout>}}_3\left|\right|}^2{P}_2^t+I+N}=\frac{{\mathrm{<figure-callout\; id="1"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">CQI</figure-callout>}}_1}{{\mathrm{\&rho;}}_1^2{\mathrm{<figure-callout\; id="2"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000031.png"\; state="\{\{state\}\}">CQI</figure-callout>}}_2+{\mathrm{\&rho;}}_2^2{\mathrm{<figure-callout\; id="3"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">CQI</figure-callout>}}_3+1}---\left(17\right)$

${\mathrm{<figure-callout\; id="1"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">\; <figure-callout\; id="2"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000031.png"\; state="\{\{state\}\}">CQI</figure-callout>\; </figure-callout>}}_{\mathrm{1,2},\mathrm{CB}}=\frac{{\left|\right|H_1{\mathrm{<figure-callout\; id="1"\; label="W"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">W</figure-callout>}}_1\left|\right|}^2{P}_1^t}{{\mathrm{\&rho;}}_1^2{\left|\right|H_2{\mathrm{<figure-callout\; id="2"\; label="F"\; filenames="HDA0000036366460000022.png,HDA0000036366460000031.png"\; state="\{\{state\}\}">F</figure-callout>}}_2\left|\right|}^2{P}_2^t+{\left|\right|H_3{\mathrm{<figure-callout\; id="3"\; label="F"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">F</figure-callout>}}_3\left|\right|}^2{P}_3^t+I+N}\&ap;\frac{{\mathrm{<figure-callout\; id="1"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">CQI</figure-callout>}}_1}{{\mathrm{\&rho;}}_1^2{\mathrm{<figure-callout\; id="2"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000031.png"\; state="\{\{state\}\}">CQI</figure-callout>}}_2+\mathrm{\&delta;}+1}---\left(18\right)$

${\mathrm{<figure-callout\; id="1"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">\; <figure-callout\; id="3"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">CQI</figure-callout>\; </figure-callout>}}_{\mathrm{1,3},\mathrm{CB}}=\frac{{\left|\right|H_1{\mathrm{<figure-callout\; id="1"\; label="W"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">W</figure-callout>}}_1\left|\right|}^2{P}_1^t}{{\left|\right|H_2{\mathrm{<figure-callout\; id="2"\; label="F"\; filenames="HDA0000036366460000022.png,HDA0000036366460000031.png"\; state="\{\{state\}\}">F</figure-callout>}}_2\left|\right|}^2{P}_2^t+{{\mathrm{\&rho;}}_2^2\left|\right|H_3{\mathrm{<figure-callout\; id="3"\; label="F"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">F</figure-callout>}}_3\left|\right|}^2{P}_3^t+I+N}\&ap;\frac{{\mathrm{<figure-callout\; id="1"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">CQI</figure-callout>}}_1}{\mathrm{\&delta;}+{\mathrm{\&rho;}}_2^2{\mathrm{<figure-callout\; id="3"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">CQI</figure-callout>}}_3+1}---\left(19\right)$

${\mathrm{CQI}}_{\mathrm{non}-\mathrm{comp}}=\frac{{\left|\right|H_1{\mathrm{<figure-callout\; id="1"\; label="W"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">W</figure-callout>}}_1\left|\right|}^2{P}_1^t}{{\left|\right|H_2{\mathrm{<figure-callout\; id="2"\; label="F"\; filenames="HDA0000036366460000022.png,HDA0000036366460000031.png"\; state="\{\{state\}\}">F</figure-callout>}}_2\left|\right|}^2{P}_2^t+{\left|\right|H_3{\mathrm{<figure-callout\; id="3"\; label="F"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">F</figure-callout>}}_3\left|\right|}^2{P}_3^t+I+N}=\frac{{\mathrm{<figure-callout\; id="1"\; label="CQI"\; filenames="HDA0000036366460000022.png,HDA0000036366460000041.png"\; state="\{\{state\}\}">CQI</figure-callout>}}_1}{2\&times;\mathrm{\&delta;}+1}---\left(20\right)$

Wherein, coefficient correlation ρ ₁, ρ ₂Be the PMI of network side according to the sub-district 1 of PMI that self confirms at last to use and UE feedback ₁, sub-district 2 PMI ₂, sub-district 3 PMI ₃Calculate.During CS/CB, when PMI is WCI, coefficient correlation ρ _iLevel off to 1, when PMI is BCI, coefficient correlation ρ _iLevel off to 0.

Here, similar in formula (17)～(20) with the concrete derivation of formula (13)～(16) among the embodiment three, repeat no more at this, according to the final result who derives and obtain in formula (17)～(20), network side only need be according to the CQI of the sub-district 1 of UE feedback ₁, sub-district 2 CQI ₂, sub-district 3 CQI ₃, and disturb mean value δ, just can calculate CQI _{1,2, CB}, CQI _{1,3, CB}, CQI _{1,2,3, CB}, CQI _Non-copm

Step 4: network side confirms UE is used the cooperation set of CS/CB according to CQI under the concrete CS/CB cooperation mode that calculates and the CQI under the non tie up system.

Particularly; Network side is confirmed the cooperation set of a suggestion according to CQI and CQI under the non tie up system and scheduling situation under the various cooperation modes of concrete CS/CB that calculate, and the cooperation request is sent in each sub-district in this cooperation set; Afterwards; Network side is again according to the situation of replying of each sub-district, the sub-district of the actual participation cooperation of finally confirming under the CS/CB situation UE to be used, and the set that the sub-district of the definite actual participation cooperation of institute is formed is the cooperation of under the CS/CB situation UE being used and gathers.

Among above-mentioned four embodiment; All formula all adopt high specific to merge detection algorithm; Need to prove that above-mentioned all formula all can also adopt the detection algorithm of least mean-square error (MMSE, Minimum Mean SquareError) to realize; Promptly;

part that comprises in all formula can be replaced by following formula (21), and concrete implementation procedure is this area common technology means, repeats no more at this.

$\left\{{[{\left(H_1{W}_1\right)}^H\&times;\left(H_1{W}_1\right)+{\mathrm{\&sigma;}}^2{I}_{n_T}]}^{-1}{\left(H_1{W}_1\right)}^H\right\}\&times;\left(H_1{W}_1\right)\&times;P_1^t---\left(21\right)$

Wherein, σ ²Be noise variance,

Be unit matrix, n _TBe number of transmit antennas, σ ²Can measure by UE.

The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to replacement and improvement etc., all should be included within protection scope of the present invention.

Claims (19)

1. the feedback method of channel quality indication (CQI) is characterized in that said method comprises:

Average CQI when cooperation is participated in the part sub-district in CQI when all cooperation is participated in sub-districts in the CQI when UE obtains non tie up system in the current C oMP measuring assembly, the current C oMP measuring assembly and the current C oMP measuring assembly, and the CQI that obtains fed back to network side.

2. the feedback method of CQI according to claim 1 is characterized in that, said UE obtains said part sub-district when participating in cooperation average CQI comprises:

Said UE obtains to include the CQI of each cooperation set of any two or more sub-districts in the current C oMP measuring assembly;

According to CQI of each the cooperation set that is obtained, obtain the mean value that institute comprises the CQI of each identical cooperation set of number of cells again, average CQI when obtaining the part sub-district and participating in cooperating.

3. the feedback method of CQI according to claim 2 is characterized in that, said UE obtains to include the CQI of each cooperation set of any two or more sub-districts in the current C oMP measuring assembly, for:

For any one cooperation set that includes any two or more sub-districts in the current C oMP measuring assembly, said UE obtain said cooperation set down available signal power, with the ratio of total interference power and noise sum, obtain the CQI of said cooperation set.

4. the feedback method of CQI according to claim 3 is characterized in that, said total interference power includes the interference power of interfered cell to said UE, and wherein, interfered cell obtains through following method the interference power of said UE:

Said UE records the channel gain of said interfered cell to self; Travel through then that all code words obtain the corresponding emission value of said channel gain among the R8 code book set C; And, obtain the interference power of said interfered cell to UE according to measured channel gain and the emission value that obtains.

5. the feedback method of CQI according to claim 1 is characterized in that, the CQI when all cooperation is participated in sub-districts in the said UE acquisition current C oMP measuring assembly, for:

Said UE acquisition includes the CQI of the cooperation set of whole sub-districts in the current C oMP measuring assembly.

6. the feedback device of a CQI is characterized in that, said device comprises: first acquiring unit and first feedback unit, wherein,

First acquiring unit, average CQI when cooperation is participated in the part sub-district in CQI when all cooperation is participated in sub-districts in the CQI when being used for obtaining current C oMP measuring assembly non tie up system, the current C oMP measuring assembly and the current C oMP measuring assembly;

First feedback unit is used for the CQI that said first acquiring unit obtains is fed back to network side.

7. the feedback device of CQI according to claim 6 is characterized in that, said computing unit comprises first acquisition module, second acquisition module and the 3rd acquisition module, wherein,

First acquisition module, the CQI when being used for obtaining current C oMP measuring assembly non tie up system;

Second acquisition module, the CQI when being used for obtaining the participation cooperation of the whole sub-districts of current C oMP measuring assembly;

The 3rd acquisition module, average CQI when being used for obtaining current C oMP measuring assembly part sub-district and participating in cooperation.

8. the feedback device of CQI according to claim 7 is characterized in that, said the 3rd acquisition module specifically is used for,

Acquisition includes the CQI of each cooperation set of any two or more sub-districts in the current C oMP measuring assembly; According to CQI of each the cooperation set that is obtained, obtain the mean value that institute comprises each identical cooperation set CQI of number of cells again, average CQI when obtaining the part sub-district and participating in cooperating.

9. the feedback device of CQI according to claim 7 is characterized in that, said second acquisition module specifically is used for,

Said UE obtains the CQI of the cooperation set that includes whole sub-districts in the current C oMP measuring assembly.

10. the feedback method of a CQI is characterized in that, said method comprises:

UE obtain in the current C oMP measuring assembly each sub-district independently in CQI and the current C oMP measuring assembly except that main Serving cell the interference mean value δ of all sub-districts to self disturbing, and CQI that obtains and interference mean value δ fed back to network side.

11. the feedback method according to the said CQI of claim 10 is characterized in that, said UE obtains in the current C oMP measuring assembly independently CQI of each sub-district, comprising:

For any sub-district in the current C oMP measuring assembly, said UE obtains the ratio of this sub-district to self available signal power and the outer interference plus noise power of current C oMP measuring assembly, obtains independently CQI of said sub-district; According to this acquisition methods, UE obtains independently CQI of interior all sub-districts of current C oMP measuring assembly.

12. the feedback method according to the said CQI of claim 10 is characterized in that, said UE obtains said interference mean value δ, comprising:

Said UE obtains in the current C oMP measuring assembly except that main Serving cell other each sub-districts respectively to the interference power of self; The ratio of the outer interference plus noise power to self of the interference power of each sub-district that obtains again being obtained and current C oMP measuring assembly; Obtain the mean value of resultant each ratio at last, obtain said interference mean value δ.

13. the feedback method according to the said CQI of claim 12 is characterized in that, said UE obtains in the current C oMP measuring assembly except that main Serving cell other each sub-districts and arrives the interference power of self, is specially:

Said UE records the channel gain of said each sub-district to self; Travel through then that all code words obtain the corresponding emission value of said channel gain among the R8 code book set C; And, obtain the interference power of said each sub-district to UE according to measured channel gain and the emission value that obtains.

14. the feedback method according to the said CQI of claim 10 is characterized in that, with the CQI that obtains and disturb after mean value δ feeds back to network side, said method also comprises at said UE:

Network side is according to the CQI and disturb mean value δ independently of each sub-district in the current C oMP measuring assembly of said UE feedback, the CQI when cooperation is participated in the part sub-district in CQI when all cooperation is participated in sub-districts in the CQI when obtaining non tie up system in the current C oMP measuring assembly, the current C oMP measuring assembly and the current C oMP measuring assembly.

15. the feedback device of a CQI is characterized in that, said device comprises: the second acquisition unit and second feedback unit, wherein,

Second acquisition unit is used for obtaining each sub-district of current C oMP measuring assembly interference mean value δ that independently disturb said UE all sub-districts except that main Serving cell in CQI and the current C oMP measuring assembly;

Second feedback unit, the CQI and the average interference value δ that are used for said second acquisition unit is obtained feed back to network side.

16. the feedback device according to the said CQI of claim 15 is characterized in that, said second acquisition unit comprises: the 4th acquisition module and the 5th acquisition module, wherein,

The 4th acquisition module is used for obtaining independently CQI of each sub-district of current C oMP measuring assembly;

The 5th acquisition module is used for obtaining the current C oMP measuring assembly interference mean value δ that disturb said UE all sub-districts except that main Serving cell.

17. the feedback device according to the said CQI of claim 16 is characterized in that, said the 4th acquisition module specifically is used for,

For any sub-district in the current C oMP measuring assembly, obtain the ratio of this sub-district to available signal power and the outer interference plus noise power of current C oMP measuring assembly of said UE, obtain independently CQI of said sub-district; According to this acquisition methods, obtain independently CQI of interior all sub-districts of current C oMP measuring assembly.

18. the feedback device according to the said CQI of claim 16 is characterized in that, said the 5th acquisition module specifically is used for,

Obtain in the current C oMP measuring assembly except that main Serving cell other each sub-districts respectively to the interference power of self; The ratio of the outer interference plus noise power to self of the interference power of each sub-district that obtains again being obtained and current C oMP measuring assembly; Obtain the mean value of resultant each ratio at last, obtain said interference mean value δ.

19. the feedback device according to the said CQI of claim 15 is characterized in that, said network side comprises the 3rd acquiring unit, be used for,

According to the CQI and disturb mean value δ independently of each sub-district in the current C oMP measuring assembly of said UE feedback, the CQI when cooperation is participated in the part sub-district in CQI when all cooperation is participated in sub-districts in the CQI when obtaining non tie up system in the current C oMP measuring assembly, the current C oMP measuring assembly and the current C oMP measuring assembly.

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