CN103580739A - Channel quality instruction information reporting and determining method and equipment - Google Patents

Abstract

The embodiment of the invention discloses a channel quality instruction CQI information reporting and determining method and equipment for multipoint cooperation transmission, relates to the field of wireless communication, and resolves the problem that in the multipoint cooperation transmission process, CQI exceeds a quantization range due to the fact that the sequence is not suitable in the reported CQI information. According to the method, a network side configures a plurality of channel state information processes for a user terminal, and configures relative CQI reference information for each channel state information process, the user terminal determines the relative CQI information corresponding to the channel state information processes according to the relative CQI reference information corresponding to the channel state information, carries the relative CQI information in the channel state information and reports the relative CQI information to the network side, and the network side determines the CQI information corresponding to the channel state information processes according to the relative CQI information corresponding to the channel state information processes and the relative CQI reference information corresponding to the channel state information processes. The channel quality instruction information reporting and determining method and equipment for multipoint cooperation transmission can resolve the problem.

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 stateinformation-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:

${\mathrm{CQI}}_{k,m,n}=Q\left(\frac{P_{k,m}}{I_{k,n}}\right);$

Wherein, CQI _{k, m, n}represent that the upper NZP CSI-RS resource m of frequency band k is at the CQI 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, n}the 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 two transfer points, and following table 1 has provided possible signal and the interference hypothesis of CQI.

Table 1

Network can be also each channel condition information process, configures a reporting source of channel state information pattern.Different channel condition information process possible configurations is different reports pattern, and corresponding channel condition information reports in reporting in pattern separately.Different channel condition information processes also possible configuration identical report pattern, corresponding channel condition information reports same reporting in pattern.Network receives the CQI of user terminal to send up, for scheduling and link circuit self-adapting.The CoMP transmission plan of network based selection, may need to utilize the CQI of user terminal to send up to calculate, thereby obtains the CQI after scheduling.CQI such as the CQI2 in network based table 1 and CQI4 feedback calculating CS/CB transmission:

${\mathrm{CQI}}_{\mathrm{CS}/\mathrm{CB}}=\frac{\mathrm{CQI}2{\left|w_2{v^{\′}}_1\right|}^2}{1+\mathrm{CQI}4{\left|w_4{v^{\′}}_2\right|}^2};$

Wherein, CQI _cS/CBthe CQI that represents the CS/CB transmission of network calculations, w ₂and w ₄the PMI feedback that represents respectively corresponding CQI2 and CQI4 feedback, v ₁and v ₂the transmitting pre-encoding matrix that represents respectively TP1 and TP2, simple for explaining, in above formula, omit band number.

In order to support different CoMP transmission plans, network is that certain the channel condition information process subset in the channel condition information process collection of user terminal configuration may need to have identical order.Such as the joint transmission for support TP1 and TP2, the CQI2 in table 1 and CQI4 feedback have identical order.In addition, in order to save feedback overhead, network or user terminal can be also the part or all of identical order of channel condition information process configuration.Such as the CQI1 in network configuration table 1 and CQI2 feedback has identical order, the information feedback that comprises CQI1 and CQI2 shares identical pre-coding matrix indication (precoding matrix indicator, PMI)/order indication (rank indicator, RI) reports.There is difference in signal and/or the interference power of different channels state information.According to supporting the demand of CoMP transmission plan or the demand of saving feedback overhead, during for the identical order of a plurality of channel condition information process configuration, the order configuring may and be not suitable for the CQI of the impaction of partial channel state information process in a plurality of channel condition information processes.Now may surpass existing CQI quantizing range with the unaccommodated CQI of configured order.For example, CQI1 and CQI2 configure identical order, and the order configuring is selected according to CQI1.Because the interference source comprising in CQI2 is less than CQI1, the value before CQI2 quantizes is greater than the value before CQI1 quantizes.CQI1 may be in quantizing range, but CQI2 may surpass quantizing range.To surpassing the CQI of quantizing range, quantize and feed back, when these CQI of network utilisation calculate, can introduce extra error, affecting CQI computational accuracy, thereby affect the effect of link circuit self-adapting, reducing systematic function.

Visible, the method for existing user terminal to send up channel quality indication (CQI) information, is the transmission plan design for single transfer point.Under the unicast of Serving cell, user terminal only needs to report the channel quality indication (CQI) information of Serving cell unicast, does not have the unaccommodated problem of order of channel quality indication (CQI) information, this problem is not optimized to design.Existing channel quality indication (CQI) information report method can not solve the problem that CQI that multicast communication is not suitable for causing due to order in reporting surpasses quantizing range.

Summary of the invention

The embodiment of the present invention provides a kind of channel quality indicator CQI information for coordinated multipoint transmission to report and determines method and apparatus, and the CQI that the CQI information reporting while adopting coordinated multipoint transmission for solving is not suitable for causing due to order surpasses the problem of quantizing range.

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

User terminal receives information and the relative 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 relative 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 relative 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, carry out measurement and the calculating of channel and interference, according to measuring and the result of calculating and relative CQI reference information corresponding to this channel condition information process, determine the relative 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 relative CQI information in this channel condition information.

A definite method for lower channel quality indicator (CQI) information, the method comprises:

Network side issues information and the relative channel quality indicator (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 relative 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 relative CQI to report in this channel condition information;

Network side is for each the channel condition information process in the channel condition information process that adopts relative CQI to report, according to differential CQI information corresponding to this channel condition information process and relative 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 relative channel quality indicator (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 relative 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 relative CQI to report, for each channel condition information process of determining, according to the reference signal configuration information of this channel condition information process, carry out measurement and the calculating of channel and interference, according to measuring and the result of calculating and relative CQI reference information corresponding to this channel condition information process, determine the relative 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 relative CQI information in this channel condition information.

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

Transmitting element, for issue information and the relative channel quality indicator (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 relative 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 relative CQI to report in this channel condition information;

Determining unit, each channel condition information process for the channel condition information process for adopting relative CQI to report, according to differential CQI information corresponding to this channel condition information process and relative 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, user terminal reports relative CQI information to network side, because the relative difference between CQI may be less, the possibility that the relative CQI information reporting surpasses quantizing range is also less, thereby solved in coordinated multipoint transmission the CQI that the dependence due to order between the channel condition information of different channels state information process causes, surpass quantizing range, affect the problem of systematic function.

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

Although CQI information is due to the dependence of order between different channels state information process, CQI may exceed quantizing range, and between impaction of partial channel state information process, the relative difference of CQI may be less.As background technology part for example in, due to the dependence of order between CQI1 and CQI2, the value before CQI2 quantizes surpasses quantizing range.But the relative difference between CQI2 and CQI1, outside TP1, comprises interference and noise power and the interference that does not comprise TP2 interference and the difference between noise power that TP2 disturbs.If TP2 is not the peak signal power interface sink of user terminal, the relative difference between CQI2 and CQI1 is very low over the probability of quantizing range.In addition, as shown in table 1, the relative difference between CQI2 and CQI4, for user receives the difference between TP1 signal power and TP2 signal power.In the measuring assembly receiving due to user, the signal power of transfer point is poor often within certain thresholding, therefore, by controlling this thresholding, can make the relative difference of CQI2 and CQI4 in quantizing range.Based on above-mentioned principle, in order to solve CQI information between user terminal different channels state information because the CQI that the dependence of order causes exceeds quantification range problem, the present invention proposes a kind of CQI information reporting for coordinated multipoint transmission and definite method.

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 relative 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 relative 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, it is dry than (SINR) and then according to the formula of background technology part that the ratio that calculates downstream signal power and interference power is letter 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 relative 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, carry out measurement and the calculating of channel and interference, according to measuring and the result of calculating and relative CQI reference information corresponding to this channel condition information process, determine the relative CQI information that this channel condition information process is corresponding, the Signal to Interference plus Noise Ratio that this relative CQI information is this channel condition information process, the CQI mapping of the Signal to Interference plus Noise Ratio of the channel condition information process that the relative CQI reference information corresponding with respect to this channel condition information process is associated,

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 relative CQI information in this channel condition information.

Concrete, in step 11, user terminal is determined needs the channel condition information process that adopts relative CQI to report in a plurality of channel condition information processes, and 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 relative CQI to report, otherwise, determine that this channel condition information process a is the channel condition information process that need to adopt relative CQI to report.

Or user terminal can also be determined as follows needs the channel condition information process that adopts relative CQI to report in a plurality of channel condition information processes:

Before user terminal is determined and is needed to adopt the channel condition information process that relative CQI reports in a plurality of channel condition information processes, user terminal receives relative CQI flag corresponding to each channel condition information process that network side issues, and each relative CQI flag represents whether respective channels state information process needs to adopt relative CQI to report;

User terminal is for each the channel condition information process a in a plurality of channel condition information processes, judges whether relative CQI flag that this channel condition information process a is corresponding indicates need to adopt relative CQI to report;

If be judged as YES, determine 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 be defined as, be, determine that this channel condition information process a is not the channel condition information process that need to adopt relative CQI to report, if be defined as noly, determine that this channel condition information process a is the channel condition information process that need to adopt relative CQI to report;

If be judged as NO, determine that this channel condition information process a is not the channel condition information process that need to adopt relative CQI to report.

Concrete, in step 11, according to measuring and the result of calculating and relative CQI reference information corresponding to this channel condition information process, determine the relative 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 CQI reference information corresponding to this channel condition information process is associated be numbered j, according to following formula one, determine relative CQI information corresponding to channel condition information process i:

Formula one: $\mathrm{\Δ}{\mathrm{CQI}}_{k,i,c}=Q\left(\frac{\mathrm{SIN}{R}_{k,i,c}}{{\mathrm{SINR}}_j}\right);$

Wherein, Δ CQI _{k, i, c}relative CQI sequence number channel condition information process i, upper, the code word c of frequency band k that represents this user terminal, SINR _{k, i, c}represent Signal to Interference plus Noise Ratio this user terminal measurement and the channel condition information process i that calculates, upper, the code word c of frequency band k; SINR _jthe average Signal to Interference plus Noise Ratio in broadband that represents the channel condition information process j of this user terminal, Q () represents to the mapping ruler of relative CQI sequence number, to determine relative CQI sequence number according to the ratio of Signal to Interference plus Noise Ratio.

Preferably, when the channel condition information process i of user terminal is different with the RI of channel condition information process j, SINR _jit is the average Signal to Interference plus Noise Ratio in broadband of the code word 0 of channel condition information process j;

When the channel condition information process i of user terminal is identical with the RI of channel condition information process j, SINR _jit is the average Signal to Interference plus Noise Ratio in broadband of the code word c of channel condition information process j.

User terminal can be according to determining that with making an appointment of network side the ratio of Signal to Interference plus Noise Ratio is to the mapping ruler of relative CQI sequence number; Or the high-level signaling that user terminal sends according to network side, determines that the ratio of Signal to Interference plus Noise Ratio is to the mapping ruler of relative CQI sequence number.

In step 11, for the channel condition information process that does not need in a plurality of channel condition information processes to adopt relative 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, the channel condition information process that adopts relative CQI to report for needs, in the channel condition information reporting, comprise relative 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 relative 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 relative 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 relative channel quality indicator (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 relative CQI reference information is and the information that channel condition information process is associated in described a plurality of channel condition information processes;

Here, the channel condition information process i that adopts relative CQI to report for needs, associated channel condition information process j and the channel condition information process i of relative 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 relative CQI to report, associated channel condition information process j and the channel condition information process i of relative 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 relative CQI to report in this channel condition information; Certainly, also comprise CQI information corresponding to channel condition information process that does not adopt relative CQI to report;

Step 22: network side is for each the channel condition information process in the channel condition information process that adopts relative CQI to report, according to differential CQI information corresponding to this channel condition information process and relative 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, according to differential CQI information corresponding to this channel condition information process and relative CQI reference information corresponding to this channel condition information process, determine the 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 CQI reference information corresponding to this channel condition information process is associated be numbered j, according to following formula two, determine CQI information corresponding to channel condition information process i:

Formula two:

Wherein, U () represents CQI quantization function; Q ^-1() represents to the mapping ruler of the ratio of Signal to Interference plus Noise Ratio, to determine the ratio of Signal to Interference plus Noise Ratio according to relative CQI sequence number;

expression is by the average Signal to Interference plus Noise Ratio in broadband of the broadband CQI information acquisition of the channel condition information process j of this user terminal.

Preferably, when the channel condition information process i of user terminal is different with the RI of channel condition information process j,

it is the average Signal to Interference plus Noise Ratio in broadband of the code word 0 of channel condition information process j;

When the channel condition information process i of user terminal is identical with the RI of channel condition information process j,

it is the average Signal to Interference plus Noise Ratio in broadband of the code word c of channel condition information process j.

Network side can be according to determining that with making an appointment of user terminal relative CQI sequence number is to the mapping ruler of the ratio of Signal to Interference plus Noise Ratio; Or network side is the mapping ruler to relative CQI sequence number by the ratio of Signal to Interference plus Noise Ratio in advance, sends to user terminal by high-level signaling.

In step 22, network side is for CQI information corresponding to the channel condition information process that does not adopt relative 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.

In this method, each relative 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.

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

In the present invention, an embodiment of the mapping ruler of the ratio of relative CQI sequence number and Signal to Interference plus Noise Ratio is as follows:

Relatively the quantity of CQI sequence number can be 4,8,16 etc., and the feedback overhead taking is respectively 2bit, 3bit, 4bit etc.Mapping ruler corresponding to the relative CQI sequence number of a kind of 2bit is as following table 2:

Table 2

Mapping ruler corresponding to the relative CQI sequence number of a kind of 3bit is as following table 3:

Table 3

Mapping ruler corresponding to the relative CQI sequence number of a kind of 4bit is as following table 4:

Relative CQI sequence number	The ratio of Signal to Interference plus Noise Ratio (dB)
		0	-1＜SINR≤0.5
1	0.5＜SINR≤2
		2	2＜SINR≤3.5
3	3.5＜SINR≤5
		4	5＜SINR≤6.5
5	6.5＜SINR≤8
		6	SINR>8
7	2.5＜SINR≤-1
		8	-4＜SINR≤-2.5
9	5.5＜SINR≤4
		10	7＜SINR≤5.5
11	8.5＜SINR≤7
		12	-10＜SINR≤8.5

13	-11.5＜SINR≤-10
		14	-13＜SINR≤-11.5
15	SINR≤-13

Table 4

In the present invention, a complete CQI reports and determines that the embodiment of method is as follows:

In the measuring assembly of certain user terminal, there are 2 transfer point TP1 and TP2, need to configure 3 channel condition information processes to user terminal;

Step 1: network issues information and the relative 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 5:

Table 5

Step 2: after the information that user terminal reception network side issues, according to the reference signal configuration information of each channel condition information process, carry out measurement and the calculating of channel and interference, obtain measurement and the result of calculation of respective channel state information process, comprising that CQI sequence number, letter are dry compares etc.; Determine the channel condition information process that need to adopt relative CQI to report, for each channel condition information process of determining, according to the result of the measurement of this channel condition information process and calculating and associated CQI sequence number corresponding to channel condition information process of relative CQI reference information corresponding to this channel condition information process, determine the relative CQI information that this channel condition information process is corresponding; Specific as follows:

The order of the channel condition information process 1 that user terminal obtains is 2, 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 2.The order of channel condition information process 3 is 1.The average Signal to Interference plus Noise Ratio in broadband of first code word of channel condition information process 1 and second code word is respectively: SINR _{1, c1}, SINR _{1, c2}, the average Signal to Interference plus Noise Ratio in broadband of first code word of channel condition information process 2 and second code word is respectively: SINR _{2, c1}, SINR _{2, c2}.

User terminal checks the relative CQI sign of channel condition information process 1, and this is designated 0, represents that this channel condition information process 1 does not need to adopt relative CQI to report.User terminal does not calculate the relative CQI information of channel condition information process 1.

User terminal checks the relative CQI sign of channel condition information process 2, and this is designated 1.User terminal checks the relative 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.User terminal judges that channel condition information process 2 need to adopt relative CQI to report, and relative CQI reference information associated channel state information process 1.Channel condition information process 2 is identical with the order of channel condition information process 1, be all 2, user terminal, respectively according to the average Signal to Interference plus Noise Ratio in broadband of two of channel condition information process 1 code words, calculates broadband or the relative CQI information of subband of two code words of channel condition information process 2:

$\left\{\begin{array}{c}\mathrm{\Δ}{\mathrm{CQI}}_{k,\mathrm{2,0}}=Q\left(\frac{{\mathrm{SINR}}_{k,\mathrm{2,0}}}{{\mathrm{SINR}}_{\mathrm{1,0}}}\right)\\ \mathrm{\Δ}{\mathrm{CQI}}_{k,\mathrm{2,1}}=Q\left(\frac{{\mathrm{SINR}}_{k,\mathrm{2,1}}}{{\mathrm{SINR}}_{\mathrm{1,1}}}\right)\end{array}\right.;$

User terminal checks the relative CQI sign of channel condition information process 3, and this is designated 1.User terminal checks the relative CQI reference 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.User terminal judges that channel condition information process 3 need to adopt relative CQI to report, and relative CQI reference information associated channel state information process 2.The order of channel condition information process 3 is 1, different from channel condition information process 2, and user terminal, according to the average Signal to Interference plus Noise Ratio in broadband of the code word 0 of channel condition information process 2, calculates broadband or the relative CQI information of subband of channel condition information process 3:

$\mathrm{\Δ}{\mathrm{CQI}}_{k,\mathrm{3,0}}=Q\left(\frac{{\mathrm{SINR}}_{k,\mathrm{3,0}}}{{\mathrm{SINR}}_{\mathrm{2,0}}}\right)$

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

User terminal is used the relative CQI information of channel condition information process 2, replaces the CQI in channel condition information process 2, and reports according to the pattern that reports of network configuration.User terminal is used the relative CQI information of channel condition information process 3, replaces the CQI in channel condition information process 3, and reports 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 relative CQI to report in this channel condition information; For each the channel condition information process in the channel condition information process that adopts relative CQI to report, according to differential CQI information corresponding to this channel condition information process and relative 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 relative CQI information of channel condition information process 2 correspondences and the relative CQI information of channel condition information process 3 correspondences, according to the CQI of relative CQI reference information calculating channel condition information process 2 and channel condition information process 3.

Network side, first according to the broadband CQI information of 2 of channel condition information process 1 code words, calculates broadband or the subband CQI information of two code words of channel condition information process 2:

Network side, again according to the broadband CQI information of the code word 1 of the channel condition information process 2 calculating, calculates broadband CQI or the subband CQI information 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 relative channel quality indicator (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 relative 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 relative CQI to report, for each channel condition information process of determining, according to the reference signal configuration information of this channel condition information process, carry out measurement and the calculating of channel and interference, according to measuring and the result of calculating and relative CQI reference information corresponding to this channel condition information process, determine the relative 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 relative 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 relative 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 relative CQI to report, otherwise, determine that this channel condition information process a is the channel condition information process that need to adopt relative CQI to report.

Further, described receiving element 30 also for: in relative CQI flag corresponding to each channel condition information process that receives network side and issue, each relative CQI flag represents whether respective channels state information process needs to adopt relative CQI to report;

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 relative CQI to report:

For each the channel condition information process a in described a plurality of channel condition information processes, judge whether relative CQI flag that this channel condition information process a is corresponding indicates need to adopt relative CQI to report;

If be judged as YES, determine 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 be defined as, be, determine that this channel condition information process a is not the channel condition information process that need to adopt relative CQI to report, if be defined as noly, determine that this channel condition information process a is the channel condition information process that need to adopt relative CQI to report;

If be judged as NO, determine that this channel condition information process a is not the channel condition information process that need to adopt relative CQI to report.

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

This channel condition information process be numbered i, the channel condition information process that CQI reference information corresponding to this channel condition information process is associated be numbered j, according to following formula one, determine relative CQI information corresponding to channel condition information process i:

Formula one: $\mathrm{\Δ}{\mathrm{CQI}}_{k,i,c}=Q\left(\frac{\mathrm{SIN}{R}_{k,i,c}}{{\mathrm{SINR}}_j}\right);$

Wherein, Δ CQI _{k, i, c}relative CQI sequence number channel condition information process i, upper, the code word c of frequency band k that represents this user terminal, SINR _{k, i, c}represent Signal to Interference plus Noise Ratio this user terminal measurement and the channel condition information process i that calculates, upper, the code word c of frequency band k; SINR _jthe average Signal to Interference plus Noise Ratio in broadband that represents the channel condition information process j of this user terminal, Q () represents to the mapping ruler of relative CQI sequence number, to determine relative CQI sequence number according to the ratio of Signal to Interference plus Noise Ratio.

Further, when the channel condition information process i of user terminal is different with the order of channel condition information process j indication RI, SINR _jit is the average Signal to Interference plus Noise Ratio in broadband of the code word 0 of channel condition information process j;

When the channel condition information process i of user terminal is identical with the RI of channel condition information process j, SINR _jit is the average Signal to Interference plus Noise Ratio in broadband of the code word c of channel condition information process j.

Further, described determining unit 31 also for:

According to determining that with making an appointment of network side the ratio of Signal to Interference plus Noise Ratio is to the mapping ruler of relative CQI sequence number; Or,

The high-level signaling sending according to network side, determines that the ratio of Signal to Interference plus Noise Ratio is to the mapping ruler of relative CQI sequence number.

Further, each relative 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 relative channel quality indicator (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 relative 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 relative CQI to report in this channel condition information;

Determining unit 42, each channel condition information process for the channel condition information process for adopting relative CQI to report, according to differential CQI information corresponding to this channel condition information process and relative 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:

This channel condition information process be numbered i, the channel condition information process that CQI reference information corresponding to this channel condition information process is associated be numbered j, according to following formula two, determine CQI information corresponding to channel condition information process i:

Formula two:

Wherein, U () represents CQI quantization function; Q ^-1() represents to the mapping ruler of the ratio of Signal to Interference plus Noise Ratio, to determine the ratio of Signal to Interference plus Noise Ratio according to relative CQI sequence number;

expression is by the average Signal to Interference plus Noise Ratio in broadband of the broadband CQI information acquisition of the channel condition information process j of this user terminal.

Further, when the channel condition information process i of user terminal is different with the RI of channel condition information process j,

it is the average Signal to Interference plus Noise Ratio in broadband of the code word 0 of channel condition information process j;

When the channel condition information process i of user terminal is identical with the RI of channel condition information process j, it is the average Signal to Interference plus Noise Ratio in broadband of the code word c of channel condition information process j.

Further, described determining unit 42 also for:

According to determining that with making an appointment of user terminal relative CQI sequence number is to the mapping ruler of the ratio of Signal to Interference plus Noise Ratio; Or,

The mapping ruler to relative CQI sequence number by the ratio of Signal to Interference plus Noise Ratio, sends to user terminal by high-level signaling in advance.

Further, each relative 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.

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

The scheme that the embodiment of the present invention provides, can solve in coordinated multipoint transmission the CQI that the dependence due to order between the channel condition information of different channels state information process causes and surpass quantizing range, affects the problem of systematic function.

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 (24)

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 relative 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 relative 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 relative 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, carry out measurement and the calculating of channel and interference, according to measuring and the result of calculating and relative CQI reference information corresponding to this channel condition information process, determine the relative 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 relative CQI information in this channel condition information.

2. the method for claim 1, is characterized in that, described user terminal is determined needs the channel condition information process that adopts relative 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 relative CQI to report, otherwise, determine that this channel condition information process a is the channel condition information process that need to adopt relative CQI to report.

3. the method for claim 1, is characterized in that, before user terminal determines to need to adopt the channel condition information process that relative CQI reports in described a plurality of channel condition information process, further comprises:

User terminal receives relative CQI flag corresponding to each channel condition information process that network side issues, and each relative CQI flag represents whether respective channels state information process needs to adopt relative CQI to report;

Described user terminal is determined needs the channel condition information process that adopts relative 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, judges whether relative CQI flag that this channel condition information process a is corresponding indicates need to adopt relative CQI to report;

If be judged as YES, determine 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 be defined as, be, determine that this channel condition information process a is not the channel condition information process that need to adopt relative CQI to report, if be defined as noly, determine that this channel condition information process a is the channel condition information process that need to adopt relative CQI to report;

If be judged as NO, determine that this channel condition information process a is not the channel condition information process that need to adopt relative CQI to report.

4. the method for claim 1, is characterized in that, describedly according to measuring and the result of calculating and relative CQI reference information corresponding to this channel condition information process, determines the relative CQI information that this channel condition information process is corresponding, specifically comprises:

This channel condition information process be numbered i, the channel condition information process that CQI reference information corresponding to this channel condition information process is associated be numbered j, according to following formula one, determine relative CQI information corresponding to channel condition information process i:

Formula one: $\mathrm{\Δ}{\mathrm{CQI}}_{k,i,c}=Q\left(\frac{\mathrm{SIN}{R}_{k,i,c}}{{\mathrm{SINR}}_j}\right);$

Wherein, Δ CQI _{k, i, c}relative CQI sequence number channel condition information process i, upper, the code word c of frequency band k that represents this user terminal, SINR _{k, i, c}represent Signal to Interference plus Noise Ratio this user terminal measurement and the channel condition information process i that calculates, upper, the code word c of frequency band k; SINR _jthe average Signal to Interference plus Noise Ratio in broadband that represents the channel condition information process j of this user terminal, Q () represents to the mapping ruler of relative CQI sequence number, to determine relative CQI sequence number according to the ratio of Signal to Interference plus Noise Ratio.

5. method as claimed in claim 4, is characterized in that, when the channel condition information process i of user terminal is different with the order of channel condition information process j indication RI, and SINR _jit is the average Signal to Interference plus Noise Ratio in broadband of the code word 0 of channel condition information process j;

When the channel condition information process i of user terminal is identical with the RI of channel condition information process j, SINR _jit is the average Signal to Interference plus Noise Ratio in broadband of the code word c of channel condition information process j.

6. method as claimed in claim 4, is characterized in that, user terminal is according to determining that with making an appointment of network side the ratio of Signal to Interference plus Noise Ratio is to the mapping ruler of relative CQI sequence number; Or,

The high-level signaling that user terminal sends according to network side, determines that the ratio of Signal to Interference plus Noise Ratio is to the mapping ruler of relative CQI sequence number.

7. as the method as described in arbitrary in claim 1-6, it is characterized in that, each relative 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. a definite method for the lower channel of transfer point more than quality indicator (CQI) information, is characterized in that, the method comprises:

Network side issues information and the relative channel quality indicator (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 relative 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 relative CQI to report in this channel condition information;

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

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 relative CQI reference information corresponding to this channel condition information process, determine the CQI information that this channel condition information process is corresponding, specifically comprise:

This channel condition information process be numbered i, the channel condition information process that CQI reference information corresponding to this channel condition information process is associated be numbered j, according to following formula two, determine CQI information corresponding to channel condition information process i:

Formula two:

Wherein, U () represents CQI quantization function; Q ^-1() represents to the mapping ruler of the ratio of Signal to Interference plus Noise Ratio, to determine the ratio of Signal to Interference plus Noise Ratio according to relative CQI sequence number;

expression is by the average Signal to Interference plus Noise Ratio in broadband of the broadband CQI information acquisition of the channel condition information process j of this user terminal.

10. method as claimed in claim 9, is characterized in that, when the channel condition information process i of user terminal is different with the RI of channel condition information process j,

it is the average Signal to Interference plus Noise Ratio in broadband of the code word 0 of channel condition information process j;

When the channel condition information process i of user terminal is identical with the RI of channel condition information process j,

it is the average Signal to Interference plus Noise Ratio in broadband of the code word c of channel condition information process j.

11. methods as claimed in claim 9, is characterized in that, network side is according to determining that with making an appointment of user terminal relative CQI sequence number is to the mapping ruler of the ratio of Signal to Interference plus Noise Ratio; Or,

Network side is the mapping ruler to relative CQI sequence number by the ratio of Signal to Interference plus Noise Ratio in advance, by high-level signaling, sends to user terminal.

12. as the method as described in arbitrary in claim 8-11, it is characterized in that, each relative 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.

13. 1 kinds of user terminals, is characterized in that, this user terminal comprises:

Receiving element, for receiving information and the relative channel quality indicator (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 relative 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 relative CQI to report, for each channel condition information process of determining, according to the reference signal configuration information of this channel condition information process, carry out measurement and the calculating of channel and interference, according to measuring and the result of calculating and relative CQI reference information corresponding to this channel condition information process, determine the relative 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 relative CQI information in this channel condition information.

14. user terminals as claimed in claim 13, 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 relative 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 relative CQI to report, otherwise, determine that this channel condition information process a is the channel condition information process that need to adopt relative CQI to report.

15. user terminals as claimed in claim 13, it is characterized in that, described receiving element also for: in relative CQI flag corresponding to each channel condition information process that receives network side and issue, each relative CQI flag represents whether respective channels state information process needs to adopt relative CQI to report;

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 relative CQI to report:

For each the channel condition information process a in described a plurality of channel condition information processes, judge whether relative CQI flag that this channel condition information process a is corresponding indicates need to adopt relative CQI to report;

If be judged as YES, determine 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 be defined as, be, determine that this channel condition information process a is not the channel condition information process that need to adopt relative CQI to report, if be defined as noly, determine that this channel condition information process a is the channel condition information process that need to adopt relative CQI to report;

If be judged as NO, determine that this channel condition information process a is not the channel condition information process that need to adopt relative CQI to report.

16. user terminals as claimed in claim 13, is characterized in that, described determining unit is used for: determine as follows relative CQI information corresponding to this channel condition information process:

This channel condition information process be numbered i, the channel condition information process that CQI reference information corresponding to this channel condition information process is associated be numbered j, according to following formula one, determine relative CQI information corresponding to channel condition information process i:

Formula one: $\mathrm{\Δ}{\mathrm{CQI}}_{k,i,c}=Q\left(\frac{\mathrm{SIN}{R}_{k,i,c}}{{\mathrm{SINR}}_j}\right);$

Wherein, Δ CQI _{k, i, c}relative CQI sequence number channel condition information process i, upper, the code word c of frequency band k that represents this user terminal, SINR _{k, i, c}represent Signal to Interference plus Noise Ratio this user terminal measurement and the channel condition information process i that calculates, upper, the code word c of frequency band k; SINR _jthe average Signal to Interference plus Noise Ratio in broadband that represents the channel condition information process j of this user terminal, Q () represents to the mapping ruler of relative CQI sequence number, to determine relative CQI sequence number according to the ratio of Signal to Interference plus Noise Ratio.

17. user terminals as claimed in claim 16, is characterized in that, when the channel condition information process i of user terminal is different with the order of channel condition information process j indication RI, and SINR _jit is the average Signal to Interference plus Noise Ratio in broadband of the code word 0 of channel condition information process j;

When the channel condition information process i of user terminal is identical with the RI of channel condition information process j, SINR _jit is the average Signal to Interference plus Noise Ratio in broadband of the code word c of channel condition information process j.

18. user terminals as claimed in claim 16, is characterized in that, described determining unit also for:

According to determining that with making an appointment of network side the ratio of Signal to Interference plus Noise Ratio is to the mapping ruler of relative CQI sequence number; Or,

The high-level signaling sending according to network side, determines that the ratio of Signal to Interference plus Noise Ratio is to the mapping ruler of relative CQI sequence number.

19. as the user terminal as described in arbitrary in claim 13-18, it is characterized in that, each relative 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.

20. 1 kinds of base stations, is characterized in that, this base station comprises:

Transmitting element, for issue information and the relative channel quality indicator (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 relative 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 relative CQI to report in this channel condition information;

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

21. base stations as claimed in claim 20, is characterized in that, described determining unit is used for: determine as follows CQI information corresponding to this channel condition information process:

This channel condition information process be numbered i, the channel condition information process that CQI reference information corresponding to this channel condition information process is associated be numbered j, according to following formula two, determine CQI information corresponding to channel condition information process i:

Formula two:

Wherein, U () represents CQI quantization function; Q ^-1() represents to the mapping ruler of the ratio of Signal to Interference plus Noise Ratio, to determine the ratio of Signal to Interference plus Noise Ratio according to relative CQI sequence number; expression is by the average Signal to Interference plus Noise Ratio in broadband of the broadband CQI information acquisition of the channel condition information process j of this user terminal.

22. base stations as claimed in claim 21, is characterized in that, when the channel condition information process i of user terminal is different with the RI of channel condition information process j,

it is the average Signal to Interference plus Noise Ratio in broadband of the code word 0 of channel condition information process j;

When the channel condition information process i of user terminal is identical with the RI of channel condition information process j,

it is the average Signal to Interference plus Noise Ratio in broadband of the code word c of channel condition information process j.

23. base stations as claimed in claim 21, is characterized in that, described determining unit also for:

According to determining that with making an appointment of user terminal relative CQI sequence number is to the mapping ruler of the ratio of Signal to Interference plus Noise Ratio; Or,

The mapping ruler to relative CQI sequence number by the ratio of Signal to Interference plus Noise Ratio, sends to user terminal by high-level signaling in advance.

24. as the base station as described in arbitrary in claim 20-23, it is characterized in that, each relative 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.

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