CN103580779A

CN103580779A - Channel quality instruction information reporting and determining method and equipment

Info

Publication number: CN103580779A
Application number: CN201210254684.9A
Authority: CN
Inventors: 倪浩; 高秋彬; 彭莹
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2012-07-20
Filing date: 2012-07-20
Publication date: 2014-02-12
Anticipated expiration: 2032-07-20
Also published as: CN103580779B; WO2014012509A1

Abstract

The embodiment of the invention discloses a channel quality instruction CQI information reporting and determining method and equipment for multipoint cooperation transmission and relates to the field of wireless communication, and the channel quality instruction CQI information reporting and determining method and equipment for multipoint cooperation transmission are used for saving the resources needed by reporting the CQI information. According to the method, a network side configures a plurality of channel state information processes for a user terminal, and configures difference CQI reference information for each channel state information process, the user terminal determines the difference CQI information corresponding to the channel state information processes according to the difference CQI reference information corresponding to the channel state information processes, carries the difference CQI information in the channel state information and reports the difference CQI information to the network side, and the network side determines the CQI information corresponding to the channel state information processes according to the difference CQI information corresponding to the channel state information processes and the difference CQI reference information corresponding to the channel state information processes. The channel quality instruction CQI information reporting and determining method and equipment for multipoint cooperation transmission can save system resources.

Description

Channel quality indication (CQI) information reports and determines method and apparatus

Technical field

The present invention relates to wireless communication field, relate in particular to a kind of channel quality indication (CQI) information and report and determine method and apparatus.

Background technology

Long Term Evolution strengthens (long term evolution-advance, LTE-A) in system, in order to reduce the adjacent area of covering edge, community user terminal (UE), disturb, improve the experience of edge, community user terminal, adopted cooperative multipoint transmission (CoMP) technology.Cooperative multipoint transmission technology is the cooperation between a plurality of transfer points (transmission point, TP) separated on geographical position.Common, a plurality of transfer points refer to the base station of different districts, a plurality of far-end radio-frequency apparatus of the base station of Huo Yige community and its control (Remote Radio Head, RRH).Cooperative multipoint transmission technology can be divided into down collaboration transmission and uply combine reception.Down collaboration multi-point is mainly divided into again two kinds of transmission plans: cooperative scheduling/precoding (coordinated scheduling/coordinated beamforming, CS/CB) and Combined Treatment (joint processing, JP).A transfer point in CS/CB transmission in a plurality of transfer points sends useful signal to user terminal, and other transfer point, by combined dispatching and wave beam forming, reduces the interference to user terminal as far as possible.Combined Treatment scheme can be divided into again joint transmission (joint transmission, JT) and dynamic transmission point selection (dynamic point selection, DPS).In JT transmission, a plurality of transfer points send useful signal to user terminal simultaneously, thereby have strengthened the reception signal of user terminal.The transfer point of user terminal is dynamically switched in DPS transmission, always from cooperation transmission point, selects the some transmission user terminal signaling to user terminal optimum.The use that can mutually combine of these cooperative multipoint transmission schemes.Can also, in conjunction with (dynamic blanking, the DB) scheme of dynamically mourning in silence, not transmitted signal of some transfer point be dynamically set on some running time-frequency resource.

In order to support cooperative multipoint transmission, the one or more downlink reference signal resources for channel measurement of network configuration, as non-zero power channel state information reference signals (non-zero power channel state information-reference signal, NZP CSI-RS) resource.User terminal utilizes the down channel measuring reference signals resource of network configuration, can measure the down channel of each transfer point.Network also can be according to the one or more downlink reference signal resources for interferometry of CoMP transmission plan configuration (the interference measurement resource supporting, IMR), user terminal utilizes interferometry downlink reference signal, can measure the interference under one or more interference hypothesis.Define a channel condition information process, a channel state information reference signals resource and an interference hypothesis of map network configuration.User terminal disturbs the interference under hypothesis according to each transfer point down channel measuring and each, can obtain the channel condition information of each transfer point under one or more interference hypothesis, comprise channel quality indication (CQI) information (Channel Quality Indicator, CQI).As the calculated examples of a kind of CQI is:

CQ I_{k, m, n} = Q (\frac{P_{k, m}}{I_{k, n}});

Wherein, CQI _{k, m, n}represent that the upper NZP CSI-RS resource m of frequency band k is at the CQI sequence number of disturbing under hypothesis n, P _k,mrepresent the downstream signal power that user terminal measures with NZP CSI-RS resource m on frequency range k, I _k,nthe interference power that represents the interference hypothesis n that user terminal measures on frequency range k, Q () is CQI quantization function, frequency band k can be whole system frequency band, can be also certain subband of band system band.It should be noted that in said process, the corresponding reference signal resource of each transfer point, may comprise one or more physical transfer points; Each disturbs the corresponding interferometry reference signal resource of hypothesis.The network of take is example as UE configures 3 transfer points, and following table 1 has provided possible signal and the interference hypothesis of CQI.

Table 1

As shown in table 1, to compare in traditional single cell transmission, user terminal only need to report the channel condition information of a point, and cooperative multipoint transmission may need to report a plurality of signal transmission hypothesis and disturb the channel condition information under hypothesis.Report expense corresponding also can be than single cell transmission report expense much bigger.Although network can be according to supported transmission plan, be only the downlink reference signal resource of user terminal configuration section and IMR to (hereinafter to be referred as resource to), user terminal is the right channel condition information of resource of report network configuration only, but cooperative multipoint transmission report expense to compare single cell transmission still can significantly to increase.

Channel condition information is with based on Physical Uplink Control Channel (physical uplink control channel, PUCCH) mode that periodic report or the aperiodic based on Physical Uplink Shared Channel (physical uplink shared channel, PUSCH) report reports.Network can be a reporting source of channel state information pattern of each channel condition information configuration.Different channel condition information possible configurations is different reports pattern, and these channel condition informations report in different reporting in pattern.Different channel condition informations also possible configuration identical report pattern, configure the identical channel condition information of pattern that reports and report same reporting in pattern.Periodic report based on PUCCH comprises and reports pattern 1-0, reports pattern 1-1, reports pattern 2-0, reports pattern 2-1.The pattern 1-1 of reporting also comprises subpattern 1 and subpattern 2, for transmission mode 9, and the reporting source of channel state information of base station 8 antenna ports.The above-mentioned pattern that reports comprises reporting types 1,1a, reporting types 2,2a, 2b, 2c, reporting types 3, reporting types 4, reporting types 5 and reporting types 6 altogether, be used for reporting CQI, pre-coding matrix indication (precoding matrix indicator, PMI)/order indication (rank indicator, RI), precoding type is indicated reporting informations such as (precoding type indicator, PTI).Non-periodic channel information reporting based on PUSCH comprises and reports pattern 1-2, reports pattern 2-2, reports mode 3-0 and report mode 3-1.

In order to reduce to report expense, in the reporting source of channel state information of single cell transmission, the subband CQI in pattern that reports that part reports aperiodic reports, and has adopted subband differential CQI to report.As reporting in mode 3-1 of reporting aperiodic, the 2-bit subband differential CQI of each code word, poor for the broadband CQI sequence number of subband CQI sequence number and corresponding code word; What report aperiodic reports in pattern 2-2, the 2-bit differential CQI of M the subband that the user of each code word is selected, the CQI sequence number of this M subband of selecting for user and the broadband CQI sequence number of corresponding code word poor.

The 2nd code word in pattern that report that partial periodicity reports adopted space differential CQI to report.As reporting in pattern 1-1 of periodic report, when the transmission mode for except the transmission mode 9 of 8 CSI-RS ports reports broadband CQI/PMI, or when the transmission mode 9 that is 8 CSI-RS ports reports broadband CQI/ 2PMI, or when the transmission mode 9 that is 8 CSI-RS ports reports broadband CQI/ 1PMI, if RI>1, space, the 3-bit broadband differential CQI of the 2nd code word is the poor of the broadband CQI sequence number of the 1st code word and the broadband CQI sequence number of the 2nd code word; Reporting in pattern 2-1 of periodic report, when the transmission mode for except the transmission mode 9 of 8 CSI-RS ports reports broadband CQI/PMI, or be that the transmission mode 9 of 8 CSI-RS ports is while reporting broadband CQI/ 2PMI and the last PTI=1 reporting, or be that the transmission mode 9 of 8 CSI-RS ports is while reporting broadband CQI/ 2PMI and the last PTI=0 reporting, if RI>1, space, the 3-bit broadband differential CQI of the 2nd code word is the poor of the broadband CQI sequence number of the 1st code word and the broadband CQI sequence number of the 2nd code word; Reporting in pattern 2-1 of periodic report, when the CQI of the subband of the transmission mode report of user terminal selection for except the transmission mode 9 of 8 CSI-RS ports, or be that the transmission mode 9 of 8 CSI-RS ports is while reporting subband CQI/ 2PMI and the last PTI=1 reporting, if RI>1, the 3-bit subband space differential CQI of the 2nd code word is the poor of the subband CQI sequence number of the 1st code word and the subband CQI sequence number of the 2nd code word.

Differential CQI report method in single cell transmission, is the correlation reporting based on same transfer point subband and broadband CQI, or the correlation reporting based on the different code word CQI of same transfer point, calculates and report the method for difference between CQI sequence number.Because differential CQI can adopt bit number still less, report, therefore reduced to report expense.This differential CQI report method also can the reporting source of channel state information for cooperative multipoint transmission in.But the expense that reports that reports the relatively single cell transmission of expense of cooperative multipoint transmission significantly increases, only relying on the correlation between reporting of CQI in a transfer point to carry out CQI difference reports, the difference that can only realize the part CQI of a transfer point reports, as the difference of subband CQI reports, or the difference of second code word CQI reports.The method, for coordinated multipoint transmission, is saved and is reported the effect of expense limited.

Visible, existing differential CQI report method is the correlation that subband CQI based on same transfer point and broadband CQI report, or the correlation that reports of the CQI of the different code words based on same transfer point.The difference that can only realize the part CQI of a transfer point reports, and for coordinated multipoint transmission, saves and reports the effect of expense limited.

Summary of the invention

The embodiment of the present invention provides a kind of CQI information reporting for coordinated multipoint transmission and definite method and apparatus, for saving the resource that reports CQI information required.

A channel quality indicator CQI information report method for coordinated multipoint transmission, the method comprises:

User terminal receives information and the differential channel quality indication CQI reference information corresponding to each channel condition information process of feedback model corresponding to reference signal configuration information, each channel condition information process of a plurality of channel condition information processes that network side issues, and each differential CQI reference information is and the information that channel condition information process is associated in described a plurality of channel condition information processes;

User terminal is determined needs the channel condition information process that adopts differential CQI to report in described a plurality of channel condition information process, for each channel condition information process of determining, according to the reference signal configuration information of this channel condition information process and differential CQI reference information corresponding to this channel condition information process, determine the differential CQI information that this channel condition information process is corresponding;

The feedback model that user terminal is corresponding according to each channel condition information process, to network side reporting status information of channel, comprises definite differential CQI information in this channel condition information.

A definite method for the channel quality indicator CQI information of coordinated multipoint transmission, the method comprises:

Network side issues information and the differential CQI reference information corresponding to each channel condition information process of feedback model corresponding to reference signal configuration information, each channel condition information process of a plurality of channel condition information processes to user terminal, each differential CQI reference information is and the information that channel condition information process is associated in described a plurality of channel condition information processes;

Network side receives the channel condition information of user terminal to send up, comprises differential CQI information corresponding to channel condition information process that adopts differential CQI to report in this channel condition information;

Differential CQI information corresponding to channel condition information process that network side adopts differential CQI to report for each, according to differential CQI information corresponding to this channel condition information process and differential CQI reference information corresponding to this channel condition information process, determine the CQI information that this channel condition information process is corresponding.

, this user terminal comprises:

Receiving element, for receiving information and the differential channel quality indication CQI reference information corresponding to each channel condition information process of feedback model corresponding to reference signal configuration information, each channel condition information process of a plurality of channel condition information processes that network side issues, each differential CQI reference information is and the information that channel condition information process is associated in described a plurality of channel condition information processes;

Determining unit, for determining that described a plurality of channel condition information processes need the channel condition information process that adopts differential CQI to report, for each channel condition information process of determining, according to the reference signal configuration information of this channel condition information process and differential CQI reference information corresponding to this channel condition information process, determine the differential CQI information that this channel condition information process is corresponding;

Feedback unit, for the feedback model corresponding according to each channel condition information process, to network side reporting status information of channel, comprises definite differential CQI information in this channel condition information.

，Gai base station, a kind of base station comprises:

Transmitting element, for issue information and the differential CQI reference information corresponding to each channel condition information process of feedback model corresponding to reference signal configuration information, each channel condition information process of a plurality of channel condition information processes to user terminal, each differential CQI reference information is and the information that channel condition information process is associated in described a plurality of channel condition information processes;

Receiving element, for receiving the channel condition information of user terminal to send up, comprises differential CQI information corresponding to channel condition information process that adopts differential CQI to report in this channel condition information;

Determining unit, for differential CQI information corresponding to channel condition information process that adopts differential CQI to report for each, according to differential CQI information corresponding to this channel condition information process and differential CQI reference information corresponding to this channel condition information process, determine the CQI information that this channel condition information process is corresponding.

In the scheme that the embodiment of the present invention provides, network side configures a plurality of channel condition information processes to user terminal, and to each channel condition information process configuration differential CQI reference information, user terminal determines according to differential CQI reference information corresponding to channel condition information process the differential CQI information that this channel condition information process is corresponding, and differential CQI information is carried at and in channel condition information, reports network side, network side is according to differential CQI information corresponding to channel condition information process and differential CQI reference information corresponding to this channel condition information process, determine the CQI information that this channel condition information process is corresponding.The bit number taking due to differential CQI information is less than the bit number that non-differential CQI information takies, and therefore reports the needed resource overhead of differential CQI information less, thereby has saved system resource.

Accompanying drawing explanation

The method flow schematic diagram that Fig. 1 provides for the embodiment of the present invention;

The other method schematic flow sheet that Fig. 2 provides for the embodiment of the present invention;

The device structure schematic diagram that Fig. 3 provides for the embodiment of the present invention;

Another device structure schematic diagram that Fig. 4 provides for the embodiment of the present invention.

Embodiment

In coordinated multipoint transmission, the CQI of a plurality of channel condition information processes reports and also has correlation.For example, in table 1, CQI1, CQI2, CQI3 and CQI4 have identical signal hypothesis, the interference that wherein CQI3 comprises TP2 and TP3, and the interference that CQI1 comprises TP2 does not comprise the interference of TP3; CQI2 does not comprise the interference that the interference of TP2 comprises TP3; CQI4 does not comprise the interference of TP2 and TP3.Without loss of generality, can suppose that TP2 interference power is better than TP3 interference power concerning user terminal.But the difference between TP2 and the interference power of TP3, is subject to the restriction of transfer point selection thresholding in measuring assembly.Meanwhile, because TP3 disturbs the most weak point in measuring assembly, the ratio that the interference of TP3 accounts in total interference is less.Therefore between CQI3 and CQI1, between CQI1 and CQI2, the degree of correlation between CQI2 and CQI4 is higher.The correlation that the present invention reports according to the CQI of a plurality of channel condition information processes in cooperative multipoint transmission, has proposed a kind of definite method of channel state information reporting method for coordinated multipoint transmission and CQI information.

Referring to Fig. 1, the CQI information uploading method for coordinated multipoint transmission for end side that the embodiment of the present invention provides, comprises the following steps:

Step 10: user terminal receives information and the differential CQI reference information corresponding to each channel condition information process of feedback model corresponding to reference signal configuration information, each channel condition information process of a plurality of channel condition information processes that network side issues, each differential CQI reference information is and the information that channel condition information process is associated in described a plurality of channel condition information processes;

Here, each channel condition information process is to suppose corresponding process with a channel state information reference signals resource and an interference of a transfer point, accordingly, the reference signal configuration information of each channel condition information process comprises that it is that the downlink reference signal that the resource information used of down channel measuring reference signals and corresponding transfer point send for interferometry to user terminal is the resource information that interferometry downlink reference signal is used that corresponding transfer point sends downlink reference signal (as NZP CSI-RS) for channel measurement to user terminal.In the resource of the resource information indication that user terminal can be used in transmission down channel measuring reference signals, carry out channel measurement and calculating, obtain downstream signal power, in the resource of the resource information indication that user terminal can be used at transmission interferometry downlink reference signal, carry out interferometry and calculating, obtain interference power, and then according to the formula of background technology part

calculate the corresponding CQI sequence number of channel condition information process.

Step 11: user terminal is determined needs the channel condition information process that adopts differential CQI to report in a plurality of channel condition information processes, for each channel condition information process of determining, according to the reference signal configuration information of this channel condition information process and differential CQI reference information corresponding to this channel condition information process, determine the differential CQI information that this channel condition information process is corresponding, this differential CQI information is CQI corresponding to this channel condition information process, the side-play amount of the CQI that the associated channel condition information process of the differential CQI reference information corresponding with respect to this channel condition information process is corresponding,

Step 12: the feedback model that user terminal is corresponding according to each channel condition information process, to network side reporting status information of channel, comprises definite differential CQI information in this channel condition information.

Concrete, in step 11, user terminal is determined needs the channel condition information process that adopts differential CQI to report in a plurality of channel condition information processes, specific implementation can be as follows: user terminal is for each the channel condition information process a in a plurality of channel condition information processes, judge this channel condition information process a, the channel condition information process b that the relative CQI reference information corresponding with this channel condition information process is associated, whether be same process, if, determine that this channel condition information process a is not the channel condition information process that need to adopt differential CQI to report, otherwise, determine that this channel condition information process a is the channel condition information process that need to adopt differential CQI to report.

Concrete, according to the reference signal configuration information of this channel condition information process and differential CQI reference information corresponding to this channel condition information process, determine the differential CQI information that this channel condition information process is corresponding, specific implementation can be as follows:

Set the i that is numbered of this channel condition information process, the channel condition information process that the differential CQI reference information that this channel condition information process i is corresponding is associated be numbered j;

According to the reference signal configuration information of this channel condition information process i, determine CQI sequence number corresponding to this channel condition information process i, according to the reference signal configuration information of channel condition information process j, determine the CQI sequence number that channel condition information process j is corresponding;

According to CQI sequence number corresponding to this channel condition information process i and CQI sequence number corresponding to channel condition information process j, determine differential CQI information corresponding to this channel condition information process i.

Concrete, according to CQI sequence number corresponding to this channel condition information process i and CQI sequence number corresponding to channel condition information process j, determine differential CQI information corresponding to this channel condition information process i, specific implementation can be as follows:

If the RI of channel condition information process i is identical with the RI of channel condition information process j, according to following formula one, determine the broadband differential CQI information of channel condition information process i:

Formula one: the broadband CQI sequence number of the code word c of broadband CQI sequence number-channel condition information process i of the code word c of broadband differential CQI information=channel condition information process j of the code word c of channel condition information process i, wherein c ∈ { 0,1}; Or,

If the RI of channel condition information process i is not identical with the RI of channel condition information process j, according to following formula two, determine the broadband differential CQI information of channel condition information process i:

Formula two: the broadband CQI sequence number of the code word c of the broadband CQI Xu – channel condition information process i of the code word 0 of broadband differential CQI information=channel condition information process j of the code word c of channel condition information process i, wherein c ∈ { 0,1}.

Further, when the RI of channel condition information process i is identical with the RI of channel condition information process j, if determine according to the feedback model that channel condition information process i is corresponding the subband CQI information that needs reporting status information of channel process i, according to following formula three, determine the subband differential CQI information of channel condition information process i:

Formula three: the subband CQI sequence number of the code word c of the broadband CQI Xu – channel condition information process i of the code word c of subband differential CQI information=channel condition information process j of the code word c of channel condition information i, wherein c ∈ { 0,1}.

Further, when the RI of channel condition information process i is not identical with the RI of channel condition information process j, if determine according to the feedback model that channel condition information process i is corresponding the subband CQI information that needs reporting status information of channel process i, according to following formula four, determine the subband differential CQI information of channel condition information process i:

Formula four: the subband CQI sequence number of the code word c of the broadband CQI Xu – channel condition information process i of the code word 0 of subband differential CQI information=channel condition information process j of the code word c of channel condition information i, wherein c ∈ { 0,1}.

In step 11, for the channel condition information process that does not need in a plurality of channel condition information processes to adopt differential CQI to report, user terminal, according to prior art, calculates CQI information corresponding to this channel condition information process according to feedback model corresponding to this channel condition information process.Accordingly, in step 12, user terminal comprises CQI information corresponding to each channel condition information process in a plurality of channel condition information processes in the channel condition information reporting to network side, wherein, for the channel condition information process that need to adopt differential CQI to report, in the channel condition information reporting, comprise differential CQI information corresponding to respective channel state information process definite in step 11, for the channel condition information process that does not need to adopt differential CQI to report, in the channel condition information reporting, comprise CQI information corresponding to respective channel state information process calculating according to prior art.Certainly, in the channel condition information reporting, can also comprise the information such as PMI, RI.

In this method, each differential CQI reference information is the index of a channel condition information process in a plurality of channel condition information processes, or the index of feedback model corresponding to channel condition information process.

Referring to Fig. 2, definite method of the CQI information for coordinated multipoint transmission for network side that the embodiment of the present invention provides, comprises the following steps:

Step 20: network side issues information and the differential CQI reference information corresponding to each channel condition information process of feedback model corresponding to reference signal configuration information, each channel condition information process of a plurality of channel condition information processes to user terminal, each differential CQI reference information is and the information that channel condition information process is associated in described a plurality of channel condition information processes;

Here, for the channel condition information process i that need to adopt differential CQI to report, associated channel condition information process j and the channel condition information process i of differential CQI reference information corresponding to this channel condition information process i that network side issues is not same process; For the channel condition information process i that does not need to adopt differential CQI to report, associated channel condition information process j and the channel condition information process i of differential CQI reference information corresponding to this channel condition information process i that network side issues is same process.

Step 21: network side receives the channel condition information of user terminal to send up, comprises differential CQI information corresponding to channel condition information process that adopts differential CQI to report in a plurality of channel condition information processes in this channel condition information; Certainly, also comprise CQI information corresponding to channel condition information process that does not adopt differential CQI to report;

Step 22: differential CQI information corresponding to channel condition information process that network side adopts differential CQI to report for each, according to differential CQI information corresponding to this channel condition information process and differential CQI reference information corresponding to this channel condition information process, determine the CQI information that this channel condition information process is corresponding.

Concrete, in step 22, network side, according to differential CQI information corresponding to this channel condition information process and differential CQI reference information corresponding to this channel condition information process, is determined the CQI information that this channel condition information process is corresponding, specific implementation can be as follows:

The corresponding CQI sequence number of channel condition information process j being associated according to differential CQI information corresponding to this channel condition information process i and differential CQI reference information corresponding to this channel condition information process i, determines CQI information corresponding to this channel condition information process i.

Concrete, the corresponding CQI sequence number of channel condition information process j being associated according to differential CQI information corresponding to this channel condition information process i and differential CQI reference information corresponding to this channel condition information process i, determine CQI information corresponding to this channel condition information process i, specific implementation can be as follows:

If RI is identical with the RI of channel condition information process j for the indication of the order of channel condition information process i, according to following formula five, determine the broadband CQI sequence number of channel condition information process i:

Formula five: the broadband differential CQI of the code word c of the broadband CQI Xu – channel condition information process i of the code word c of broadband CQI sequence number=channel condition information process j of the code word c of channel condition information process i, wherein c ∈ { 0,1}; Or,

If the RI of channel condition information process i is not identical with the RI of channel condition information process j, according to following formula six, determine the broadband CQI sequence number of channel condition information process i:

Formula six: the broadband differential CQI of the code word c of the broadband CQI Xu – channel condition information process i of the code word 0 of broadband CQI sequence number=channel condition information process j of the code word c of channel condition information process i, wherein c ∈ { 0,1}.

Further, when the RI of channel condition information process i is identical with the RI of channel condition information process j, if comprise the subband differential CQI information of channel condition information process i in the channel condition information reporting, according to following formula seven, determine the subband CQI sequence number of channel condition information process i:

Formula seven: the subband differential CQI of the code word c of the broadband CQI Xu – channel condition information process i of the code word c of subband CQI sequence number=channel condition information process j of the code word c of channel condition information process i, wherein c ∈ { 0,1}.

Further, when the RI of channel condition information process i is not identical with the RI of channel condition information process j, if comprise the subband differential CQI information of channel condition information process i in the channel condition information reporting, according to following formula eight, determine the subband CQI sequence number of channel condition information process i:

Formula eight: the subband differential CQI of the code word c of the broadband CQI Xu – channel condition information process i of the code word 0 of subband CQI sequence number=channel condition information process j of the code word c of channel condition information process i, wherein c ∈ { 0,1}.

In step 22, network side is for CQI information corresponding to the channel condition information process that does not adopt differential CQI to report comprising in the channel condition information receiving, according to prior art, according to feedback model corresponding to this channel condition information process, determine the CQI information that this channel condition information process is corresponding.

The executive agent of this method can be any network equipments such as a transfer point of base station or terminal.

Embodiment:

Supposing has 3 transfer point TP1, TP2, TP3 in the measuring assembly of certain user terminal, need to configure 3 channel condition information processes to user terminal;

Step 1: network issues information and the differential CQI reference information corresponding to each channel condition information process of feedback model corresponding to reference signal configuration information, each channel condition information process of each channel condition information process to user terminal;

The information specifically issuing is as shown in table 2:

Table 2

Step 2: after the information that user terminal reception network side issues, carry out measurement and the calculating of channel and interference according to the reference signal configuration information of each channel condition information process, obtain CQI sequence number corresponding to respective channel state information process; Determine the channel condition information process that need to adopt differential CQI to report, for each channel condition information process of determining, CQI sequence number corresponding to channel condition information process being associated according to CQI sequence number corresponding to this channel condition information process and differential CQI reference information corresponding to this channel condition information process, determines the differential CQI information that this channel condition information process is corresponding; Specific as follows:

The order of the channel condition information process 1 of user terminal is 1, and the order of channel condition information process 2 depends on the order of channel condition information process 1, so the order of channel condition information process 2 is also 1.The order of channel condition information process 3 is 2;

User terminal checks the differential CQI reference information of channel condition information process 1, for channel condition information process index 1, identical with the channel condition information process index 1 of current channel condition information process 1, need to not calculate according to method of the present invention the differential CQI information of channel condition information process 1.

User terminal checks the differential CQI reference information of channel condition information process 2, is channel condition information process index 1, different from the channel condition information process index 2 of current channel condition information process 2.Channel condition information process 2 is identical with the order of channel condition information process 1, is all 1, and user terminal, respectively according to the broadband CQI sequence number of the code word 0 of channel condition information process 1, calculates the differential CQI information of the code word 0 of channel condition information process 2, as follows:

The broadband CQI sequence number of the code word 0 of the broadband CQI sequence number channel condition information information 2 of the code word 0 of broadband differential CQI information=channel condition information information 1 of the code word 0 of channel condition information process 2;

If determine the subband CQI information that needs reporting status information of channel process 2 according to the feedback model of channel condition information process 2 correspondences, calculate in the following manner the subband differential CQI information of channel condition information process 2:

The subband CQI sequence number of the code word 0 of the broadband CQI Xu – channel condition information process 2 of the code word 0 of subband differential CQI information=channel condition information process 1 of the code word 0 of channel condition information process 2;

User terminal checks the differential CQI reference information of channel condition information process 3, is channel condition information process index 2, different from the channel condition information process index 3 of current channel condition information process 3.The order of channel condition information process 3 is 2, different from channel condition information process 2, and user terminal, according to the broadband CQI sequence number of the code word 0 of channel condition information process 2, calculates the broadband differential CQI information of channel condition information process 3, as follows:

The broadband CQI sequence number of the code word 0 of the broadband CQI Xu – channel condition information process 3 of the code word 0 of broadband differential CQI information=channel condition information process 2 of the code word 0 of channel condition information process 3;

The broadband CQI sequence number of the code word 1 of the broadband CQI Xu – channel condition information process 3 of the code word 0 of broadband differential CQI information=channel condition information process 2 of the code word 1 of channel condition information process 3;

If determine the subband CQI information that needs reporting status information of channel process 3 according to the feedback model of channel condition information process 3 correspondences, calculate in the following manner the subband differential CQI information of channel condition information process 3:

The subband CQI sequence number of the code word 0 of the broadband CQI sequence number channel condition information process 3 of the code word 0 of subband differential CQI information=channel condition information process 2 of the code word 0 of channel condition information process 3;

The subband CQI sequence number of the code word 1 of the broadband CQI Xu – channel condition information process 3 of the code word 0 of subband differential CQI=channel condition information process 2 of the code word 1 of channel condition information process 3;

Step 3: the feedback model corresponding according to each channel condition information process, to network side reporting status information of channel, in this channel condition information, comprise definite differential CQI information, the differential CQI information that specifically comprises the CQI information of channel condition information process 1 correspondence, the differential CQI information of channel condition information process 2 correspondences and channel condition information process 31 correspondences, is achieved as follows:

User terminal is used the differential CQI information of channel condition information process 2 correspondences to replace the CQI sequence number in channel condition information process 2, and reports according to the pattern that reports of network configuration.CQI sequence number in the channel condition information of the differential CQI information replacement channel condition information process 3 of user terminal use channel condition information process 3, and report according to the pattern that reports of network configuration.

Step 4: network side receives the channel condition information of user terminal to send up, comprises differential CQI information corresponding to channel condition information process that adopts differential CQI to report in this channel condition information; Differential CQI information corresponding to channel condition information process that adopts differential CQI to report for each, according to differential CQI information corresponding to this channel condition information process and differential CQI reference information corresponding to this channel condition information process, determine the CQI information that this channel condition information process is corresponding, specific as follows:

The CQI sequence number that comprises channel condition information process 1 correspondence in the channel condition information of the user terminal to send up that network side receives, the differential CQI information of the differential CQI information of channel condition information process 2 correspondences and channel condition information process 3 correspondences, according to differential CQI reference information, calculate the CQI information of channel condition information process 2 and channel condition information process 3 correspondences.

Network side, first according to the broadband CQI sequence number of the code word 0 of channel condition information process 1, calculates the broadband of the code word 0 of channel condition information process 2:

The broadband differential CQI information of the code word 0 of the broadband CQI Xu – channel condition information process 2 of the code word 0 of broadband CQI sequence number=channel condition information process 1 of the code word 0 of channel condition information process 2;

If comprise the subband differential CQI information of channel condition information process 2 in the channel condition information reporting, determine in the following manner the subband CQI information of channel condition information process 2:

The subband differential CQI information of the code word 0 of the broadband CQI Xu – channel condition information process 2 of the code word 0 of subband CQI sequence number=channel condition information process 1 of the code word 0 of channel condition information process 2;

Network side, again according to the broadband CQI sequence number of the code word 0 of the channel condition information process 2 calculating, calculates broadband CQI or the subband CQI information of channel condition information process 3:

The broadband differential CQI information of the code word 0 of the broadband CQI sequence number channel condition information process 3 of the code word 0 of broadband CQI sequence number=channel condition information process 2 of the code word 0 of channel condition information process 3;

The broadband differential CQI information of the code word 1 of the broadband CQI sequence number channel condition information process 3 of the code word 0 of broadband CQI sequence number=channel condition information process 2 of the code word 1 of channel condition information process 3;

If comprise the subband differential CQI information of channel condition information process 3 in the channel condition information reporting, determine in the following manner the subband CQI information of channel condition information process 3:

The subband differential CQI information of the code word 0 of the broadband CQI Xu – channel condition information process 3 of the code word 0 of subband CQI sequence number=channel condition information process 2 of the code word 0 of channel condition information process 3;

The subband differential CQI information of the code word 1 of the broadband CQI Xu – channel condition information process 3 of the code word 0 of subband CQI sequence number=channel condition information process 2 of the code word 1 of channel condition information process 3.

Referring to Fig. 3, the embodiment of the present invention offers a kind of user terminal, and this user terminal comprises:

Receiving element 30, for receiving information and the differential channel quality indication CQI reference information corresponding to each channel condition information process of feedback model corresponding to reference signal configuration information, each channel condition information process of a plurality of channel condition information processes that network side issues, each differential CQI reference information is and the information that channel condition information process is associated in described a plurality of channel condition information processes;

Determining unit 31, for determining that described a plurality of channel condition information processes need the channel condition information process that adopts differential CQI to report, for each channel condition information process of determining, according to the reference signal configuration information of this channel condition information process and differential CQI reference information corresponding to this channel condition information process, determine the differential CQI information that this channel condition information process is corresponding;

Feedback unit 32, for the feedback model corresponding according to each channel condition information process, to network side reporting status information of channel, comprises definite differential CQI information in this channel condition information.

Further, described determining unit 31 for: determine that as follows described a plurality of channel condition information processes need the channel condition information process that adopts differential CQI to report:

For each the channel condition information process a in described a plurality of channel condition information processes, judge this channel condition information process a, the channel condition information process b that the relative CQI reference information corresponding with this channel condition information process is associated, whether be same process, if, determine that this channel condition information process a is not the channel condition information process that need to adopt differential CQI to report, otherwise, determine that this channel condition information process a is the channel condition information process that need to adopt differential CQI to report.

Further, described determining unit 31 for: determine as follows differential CQI information corresponding to this channel condition information process:

This channel condition information process be numbered i, the channel condition information process that the differential CQI reference information that this channel condition information process i is corresponding is associated be numbered j;

Further, described determining unit 31 for: determine as follows differential CQI information corresponding to this channel condition information process i:

If RI is identical with the RI of channel condition information process j for the indication of the order of channel condition information process i, according to following formula one, determine the broadband differential CQI information of channel condition information process i:

Formula one: the broadband CQI sequence number of the code word c of the broadband CQI Xu – channel condition information process i of the code word c of broadband differential CQI information=channel condition information process j of the code word c of channel condition information process i, wherein c ∈ { 0,1}; Or,

Further, described determining unit 31 also for:

When the RI of channel condition information process i is identical with the RI of channel condition information process j, if determine according to the feedback model that channel condition information process i is corresponding the subband CQI information that needs reporting status information of channel process i, according to following formula three, determine the subband differential CQI information of channel condition information process i:

Further, described determining unit 31 also for:

When the RI of channel condition information process i is not identical with the RI of channel condition information process j, if determine according to the feedback model that channel condition information process i is corresponding the subband CQI information that needs reporting status information of channel process i, according to following formula four, determine the subband differential CQI information of channel condition information process i:

Further, each differential CQI reference information is the index of a channel condition information process in described a plurality of channel condition information process, or the index of feedback model corresponding to channel condition information process.

Referring to Fig. 4, the embodiment of the present invention provides ，Gai base station, a kind of base station to comprise:

Transmitting element 40, for issue information and the differential CQI reference information corresponding to each channel condition information process of feedback model corresponding to reference signal configuration information, each channel condition information process of a plurality of channel condition information processes to user terminal, each differential CQI reference information is and the information that channel condition information process is associated in described a plurality of channel condition information processes;

Receiving element 41, for receiving the channel condition information of user terminal to send up, comprises differential CQI information corresponding to channel condition information process that adopts differential CQI to report in this channel condition information;

Determining unit 42, for differential CQI information corresponding to channel condition information process that adopts differential CQI to report for each, according to differential CQI information corresponding to this channel condition information process and differential CQI reference information corresponding to this channel condition information process, determine the CQI information that this channel condition information process is corresponding.

Further, described determining unit 42 for: determine as follows CQI information corresponding to this channel condition information process:

Further, described determining unit 42 for: determine as follows CQI information corresponding to this channel condition information process i:

Further, described determining unit 42 also for:

When the RI of channel condition information process i is identical with the RI of channel condition information process j, if comprise the subband differential CQI information of channel condition information process i in the channel condition information reporting, according to following formula seven, determine the subband CQI sequence number of channel condition information process i:

Further, described determining unit 42 also for:

When the RI of channel condition information process i is not identical with the RI of channel condition information process j, if comprise the subband differential CQI information of channel condition information process i in the channel condition information reporting, according to following formula eight, determine the subband CQI sequence number of channel condition information process i:

To sum up, beneficial effect of the present invention comprises:

In the scheme that the embodiment of the present invention provides, during coordinated multipoint transmission, network side configures a plurality of channel condition information processes to user terminal, and to each channel condition information process configuration differential CQI reference information, user terminal determines according to differential CQI reference information corresponding to channel condition information process the differential CQI information that this channel condition information process is corresponding, and differential CQI information is carried at and in channel condition information, reports network side, network side is according to differential CQI information corresponding to channel condition information process and differential CQI reference information corresponding to this channel condition information process, determine the CQI information that this channel condition information process is corresponding.The bit number taking due to differential CQI information is less than the bit number that non-differential CQI information takies, and therefore reports the needed resource overhead of differential CQI information less, thereby has saved system resource.

The present invention is with reference to describing according to flow chart and/or the block diagram of the method for the embodiment of the present invention, equipment (system) and computer program.Should understand can be in computer program instructions realization flow figure and/or block diagram each flow process and/or the flow process in square frame and flow chart and/or block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, the instruction of carrying out by the processor of computer or other programmable data processing device is produced for realizing the device in the function of flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.

These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, the instruction that makes to be stored in this computer-readable memory produces the manufacture that comprises command device, and this command device is realized the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.

These computer program instructions also can be loaded in computer or other programmable data processing device, make to carry out sequence of operations step to produce computer implemented processing on computer or other programmable devices, thereby the instruction of carrying out is provided for realizing the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame on computer or other programmable devices.

Although described the preferred embodiments of the present invention, once those skilled in the art obtain the basic creative concept of cicada, can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the scope of the invention.

Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.

Claims

1. for a channel quality indicator CQI information report method for coordinated multipoint transmission, it is characterized in that, the method comprises:

User terminal receives information and the differential CQI reference information corresponding to each channel condition information process of feedback model corresponding to reference signal configuration information, each channel condition information process of a plurality of channel condition information processes that network side issues, and each differential CQI reference information is and the information that channel condition information process is associated in described a plurality of channel condition information processes;

2. the method for claim 1, it is characterized in that, described user terminal is determined needs the channel condition information process that adopts differential CQI to report in described a plurality of channel condition information process, specifically comprise: user terminal is for each the channel condition information process a in described a plurality of channel condition information processes, judge this channel condition information process a, the channel condition information process b that the relative CQI reference information corresponding with this channel condition information process is associated, whether be same process, if, determine that this channel condition information process a is not the channel condition information process that need to adopt differential CQI to report, otherwise, determine that this channel condition information process a is the channel condition information process that need to adopt differential CQI to report.

3. the method for claim 1, it is characterized in that, describedly according to the reference signal configuration information of this channel condition information process and differential CQI reference information corresponding to this channel condition information process, determine the differential CQI information that this channel condition information process is corresponding, specifically comprise:

4. method as claimed in claim 3, it is characterized in that, describedly according to CQI sequence number corresponding to this channel condition information process i and CQI sequence number corresponding to channel condition information process j, determine differential CQI information corresponding to this channel condition information process i, specifically comprise:

5. method as claimed in claim 4, it is characterized in that, when the RI of channel condition information process i is identical with the RI of channel condition information process j, if determine according to the feedback model that channel condition information process i is corresponding the subband CQI information that needs reporting status information of channel process i, according to following formula three, determine the subband differential CQI information of channel condition information process i:

Formula three: the subband CQI sequence number of the code word c of the broadband CQI sequence number channel condition information process i of the code word c of subband differential CQI information=channel condition information process j of the code word c of channel condition information i, wherein c ∈ { 0,1}.

6. method as claimed in claim 4, it is characterized in that, when the RI of channel condition information process i is not identical with the RI of channel condition information process j, if determine according to the feedback model that channel condition information process i is corresponding the subband CQI information that needs reporting status information of channel process i, according to following formula four, determine the subband differential CQI information of channel condition information process i:

7. as the method as described in arbitrary in claim 1-6, it is characterized in that, each differential CQI reference information is the index of a channel condition information process in described a plurality of channel condition information process, or the index of feedback model corresponding to channel condition information process.

8. for a definite method for the channel quality indicator CQI information of coordinated multipoint transmission, it is characterized in that, the method comprises:

9. method as claimed in claim 8, it is characterized in that, describedly according to differential CQI information corresponding to this channel condition information process and differential CQI reference information corresponding to this channel condition information process, determine the CQI information that this channel condition information process is corresponding, specifically comprise:

10. method as claimed in claim 9, it is characterized in that, the described corresponding CQI sequence number of channel condition information process j being associated according to differential CQI information corresponding to this channel condition information process i and differential CQI reference information corresponding to this channel condition information process i, determine CQI information corresponding to this channel condition information process i, specifically comprise:

11. methods as claimed in claim 10, it is characterized in that, when the RI of channel condition information process i is identical with the RI of channel condition information process j, if comprise the subband differential CQI information of channel condition information process i in the channel condition information reporting, according to following formula seven, determine the subband CQI sequence number of channel condition information process i:

Formula seven: the subband differential CQI of the code word c of the broadband CQI sequence number channel condition information process i of the code word c of subband CQI sequence number=channel condition information process j of the code word c of channel condition information process i, wherein c ∈ { 0,1}.

12. methods as claimed in claim 10, it is characterized in that, when the RI of channel condition information process i is not identical with the RI of channel condition information process j, if comprise the subband differential CQI information of channel condition information process i in the channel condition information reporting, according to following formula eight, determine the subband CQI sequence number of channel condition information process i:

13. as the method as described in arbitrary in claim 8-12, it is characterized in that, each differential CQI reference information is the index of a channel condition information process in described a plurality of channel condition information process, or the index of feedback model corresponding to channel condition information process.

14. 1 kinds of user terminals, is characterized in that, this user terminal comprises:

15. user terminals as claimed in claim 14, is characterized in that, described determining unit is used for: determine that as follows described a plurality of channel condition information processes need the channel condition information process that adopts differential CQI to report:

16. user terminals as claimed in claim 14, is characterized in that, described determining unit is used for: determine as follows differential CQI information corresponding to this channel condition information process:

17. user terminals as claimed in claim 16, is characterized in that, described determining unit is used for: determine as follows differential CQI information corresponding to this channel condition information process i:

Formula two: the broadband CQI sequence number of the code word c of the broadband CQI sequence number channel condition information process i of the code word 0 of broadband differential CQI information=channel condition information process j of the code word c of channel condition information process i, wherein c ∈ { 0,1}.

18. user terminals as claimed in claim 17, is characterized in that, described determining unit also for:

19. user terminals as claimed in claim 17, is characterized in that, described determining unit also for:

20. as the user terminal as described in arbitrary in claim 14-19, it is characterized in that, each differential CQI reference information is the index of a channel condition information process in described a plurality of channel condition information process, or the index of feedback model corresponding to channel condition information process.

21. 1 kinds of base stations, is characterized in that, this base station comprises:

22. base stations as claimed in claim 21, is characterized in that, described determining unit is used for: determine as follows CQI information corresponding to this channel condition information process:

23. base stations as claimed in claim 22, is characterized in that, described determining unit is used for: determine as follows CQI information corresponding to this channel condition information process i:

24. base stations as claimed in claim 23, is characterized in that, described determining unit also for:

25. base stations as claimed in claim 23, is characterized in that, described determining unit also for:

26. as the base station as described in arbitrary in claim 21-25, it is characterized in that, each differential CQI reference information is the index of a channel condition information process in described a plurality of channel condition information process, or the index of feedback model corresponding to channel condition information process.