CN102325013B

CN102325013B - Channel state information transmission method and device

Info

Publication number: CN102325013B
Application number: CN201110202554.6A
Authority: CN
Inventors: 高雪娟; 沈祖康; 林亚男
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2011-07-19
Filing date: 2011-07-19
Publication date: 2014-04-02
Anticipated expiration: 2031-07-19
Also published as: CN102325013A; WO2013010439A1

Abstract

The embodiment of the invention discloses a channel state information transmission method and device and relates to the technical field of radio communication, and the method and device provided by the invention are used for solving the problem of how to simultaneously transmit CSI (Channel State Information) of a plurality of downlink carriers. The method comprises: determining the downlink carriers needing CSI compression in the plurality of downlink carriers needing to feed back the CSI in a current uplink sub-frame by a terminal; compressing the CSI of the downlink carriers which need the CSI compression; and feeding back the compressed CSI corresponding to the downlink carriers needing the CSI compression, and the CSI corresponding to the downlink carriers, except for the downlink carriers needing the CSI compression, in the plurality of downlink carriers needing to feed back the CSI in the current uplink sub-frame, to a base station in the current uplink sub-frame. The method and the device can be used for realizing the scheme of simultaneously transmitting the CSI of the plurality of downlink carriers in a same uplink sub-frame, so that the base station can simultaneously obtain the CSI of the plurality of downlink carriers to improve the accuracy of downlink scheduling.

Description

Channel state information transmission method and equipment

Technical field

The present invention relates to wireless communication field, relate in particular to a kind of channel state information transmission method and equipment.

Background technology

For long-term evolution upgrading (Long Term Evolution Advanced, LTE-A) system, for supporting than Long Term Evolution (Long Term Evolution, LTE) the wider system bandwidth of system, can some spectrum aggregatings of existing system will be distributed to, gather into large bandwidth and supply with long-term evolution multi-carrier system use, i.e. carrier aggregation (Carrier Aggregation, CA) technology.Now in system, up-downgoing carrier wave can asymmetricly configure, and user may take N1 >=1 carrier wave and carries out downlink transfer, and N2 >=1 carrier wave carries out uplink, as shown in Figure 1.

In LTE-A version 10 (Rel-10) CA system, in order effectively to carry out carrier dispatching and link circuit self-adapting process, base station need to obtain user terminal (User Equipment, channel condition information (the Channel State Information of a plurality of descending carriers of UE) measuring, CSI), with this, carry out multi-carrier scheduling.CSI can comprise order indication (Rank Indicator, RI) information, channel quality indication (Channel Quality Indicator, CQI) information and pre-coding matrix indication (Precoding Matrix Indicator, PMI) information, wherein CQI information is divided into again broadband CQI (Wide-band CQI) information and subband CQI (Sub-band CQI) information.UE can report pattern (Reporting Mode) the periodic CSI information of the upper transmission of row control channel (PUCCH) physically according to following four kinds:

The first, Mode 1-0 (being that broadband CQI reports pattern, without PMI):

At RI, report (only effective for transmission mode 3): UE in subframe need report type (Type) 3 reports that comprise a RI;

At CQI, report in subframe: UE need report Type 4 reports that comprise a broadband CQI, no matter whether RI is greater than 1, this CQI only comprises the CQI of code word 0; For transmission mode 3, the RI of CQI based on finally reporting calculates, and for other transmission modes, based on RI=1, calculates.

The second, Mode 1-1 (being that CQI+ mono-PMI in broadband reports pattern):

At RI, report (only effective to transmission mode 4,8,9): UE in subframe need report Type 3 reports that comprise a RI;

At RI and a PMI (first PMI), report in subframe (only transmission mode 9 is descended and configured under 8CSI-RS (channel condition information-pilot signal) port case effective in subpattern 1 (submode 1)): UE reports Type 5 reports that comprise a RI and PMI joint instructions;

At CQI and PMI, report in subframe: UE chooses a PMI from codebook subset, an and definite broadband CQI, this CQI is that hypothesis all uses the single PMI of above-mentioned selection to calculate in all subbands, when RI > 1, this CQI also comprises space, the broadband differential CQI value of 3 bits, the difference value that represents the CQI of code word 1 and the CQI of numeral 0, for transmission mode 4,8 and 9, CQI value is to calculate with the RI based on finally reporting, for other transmission modes, based on RI=1, calculate; UE reports Type 2/2b/2c report according to following situation:

For transmission mode 4 and 8: report the Type2 report that comprises above-mentioned broadband CQI and the 2nd PMI (second PMI) who selects;

For the transmission mode 9 that is configured in submode1: report the Type2b report that comprises above-mentioned broadband CQI and the 2nd PMI who selects;

For the transmission mode 9 that is configured in submode2: report the Type2c report of the first and second PMI that comprise above-mentioned broadband CQI and determine according to the above-mentioned single PMI selecting.

The third, Mode 2-0 (being that subband CQI reports pattern, without PMI):

At RI, report (only effective for transmission mode 3): UE in subframe need report Type 3 reports that comprise a RI;

At CQI, report in subframe: UE need report Type 4 reports that comprise a broadband CQI, no matter whether RI is greater than 1, this CQI only comprises the CQI of code word 0; For transmission mode 3, the RI of this CQI based on finally reporting calculates, and for other transmission modes, based on RI=1, calculates;

CQI at selected subband reports in subframe: in every J portions of bandwidth, UE should include N _jin the subband set of subband, select a first-selected subband, report Type 1 report of the L bit flag of the CQI that comprises this first-selection subband and this first-selection subband, this CQI value is only reflected in the transmission on selected subband in the portions of bandwidth determining in previous step, Type 1 report of each portions of bandwidth will report at each continuous upper time signal machine successively repeating query, no matter whether RI is greater than 1, this CQI only comprises the CQI of code word 0; For transmission mode 3, the RI that the selection of first-selected subband and the CQI of this subband report based on last calculates, and for other transmission mode, based on RI=1, calculates.

The 4th kind, Mode 2-1 (being that subband CQI+PMI reports pattern):

At RI, report (if the port number of CSI-RS is configured to 2 or 4, only effective for transmission mode 4,8 and 9): UE in subframe need report Type 3 reports that comprise a RI;

At the RI that has configured the transmission mode 9 of 8 port CSI-RS, report in subframe: UE reports Type 6 reports that comprise a RI value and a precoding type indication (PTI, precoder type indication) value;

At broadband CQI and PMI, report in subframe: UE chooses a PMI value from codebook subset; And:

To the transmission mode except transmission mode 9: UE, need report a Type 2 reports, comprise: a broadband CQI value, this CQI is that hypothesis all uses the above-mentioned single PMI choosing to calculate in all subbands, and a PMI who selects (wideband PMI) value; When RI > 1, also comprise space, the broadband differential CQI value of 3 bits;

To transmission mode 9: when PTI=0, UE need report the Type2a report of a PMI value that comprises a selection; When PTI=1 or CSI-RS port are 2 or 4, UE need report a Type2b report, comprise: a broadband CQI value, this CQI is that hypothesis all uses the above-mentioned single PMI choosing to calculate in all subbands, and the 2nd PMI value of a selection, when RI > 1, also comprise space, the broadband differential CQI value of 3 bits;

For transmission mode 4,8 and 9, CQI value, be to take the last RI reporting to calculate as condition, for other transmission modes, the RI=1 of take calculates as condition;

CQI at selected subband reports in subframe: in every J portions of bandwidth, UE should include N _jin the subband set of subband, select a first-selected subband;

To the transmission mode except having configured the transmission mode 9 of 8 port CSI-RS: UE time signal machine on each is self-contained continuous, be that each portions of bandwidth sends a Type1 report, comprise: the CQI value of code word 0 in this first-selection subband, and the L bit flag of first-selected subband, this CQI value is only reacted the transmission on subband selected in the portions of bandwidth that previous step determines, when RI > 1, also comprise that extra 3 bits represent that code word 1 is with respect to the subband space differential CQI value of the CQI offset level of code word 0, wherein, code word 1 offset level=code word 0 subband CQI sequence number-code word 1 subband CQI sequence number, and suppose with the single PMI reporting recently, to calculate in all subbands,

To having configured the transmission mode 9 of 8 port CSI-RS: when PTI=0, UE need report chance to report a Type2b report at each continuously, comprise: a broadband CQI value, this CQI is that hypothesis all uses single PIM to calculate in all subbands, and a 2nd PMI value of selecting from codebook subset, when RI > 1, also comprise 3 bit width carrying space differential CQI values, its differential mode is the same;

To transmission mode 9: when PTI=1, UE time signal machine on each is self-contained continuous is reported for each portions of bandwidth sends a Type1a, comprise: the CQI value of code word 0 in this first-selection subband, and the L bit flag of first-selected subband, this CQI value is only reacted the transmission on subband selected in the portions of bandwidth that previous step determines, when RI > 1, also comprise extra 3 bit subband space differential CQI values, its differential mode is the same, and suppose with the single PMI reporting recently, to calculate in all subbands, and a 2nd PMI value of selecting from codebook subset,

For transmission mode 4,8 and 9, the RI that the selection of first-selected subband and subband CQI value report based on last calculates, and for other transmission mode, based on RI=1, calculates.

In a sub-frame of uplink, carrier wave is corresponding a kind of CSI reporting types (Reporting Type) only, as shown in table 1, the maximum CSI number of bits of feedback of a carrier wave be 11 bits (wherein, for subband CQI pattern, subband index L is 2 bits to the maximum), in LTE-A Rel-10 system, the transmission of cycle CSI information adopts PUCCH format 2/2a/2b, its maximum transfer capacity is 13 bits, therefore in Rel-10 system, be only supported in the CSI that feeds back a descending carrier in a subframe, the CSI of each descending carrier reports and can pass through time division multiplexing (Time Division Multiplex in principle, TDM) mode is fed back.If exist a plurality of carrier waves need to feed back CSI in current subframe simultaneously, according to reporting Type priority to select a CSI with the carrier wave of high priority to report: that priority is the highest is Types 3,5,6,2a, secondly be Types 2,2b, 2c, 4, that priority is minimum is Types 1,1a.If exist a plurality of carrier waves to there is identical high priority type simultaneously, according to carrier index, select to report the CSI of the carrier wave of minimum carrier index.

Table 1: every kind of PUCCH CSI reports the bit number that reports of pattern

Wherein, antenna ports is antenna port.Spatial multiplexing is spatial reuse.

In addition, in LTE-A Rel-10CA system, for the UE that has configured a plurality of carrier waves, if only at main carrier (Primary Cell, Pcell) receive data, continue to use Rel-8/9 behavior, according to the configuration of higher level parameters simultaneousAckNackAndCQI, determine whether to support ACK/NACK and cycle CSI to transmit in PUCCH, if supported, adopt PUCCH format 2 (for extended cyclic prefix (CP, or PUCCH format 2a/2b (for conventional CP) simultaneously transferring ACK/NACK and CSI Cyclic Prefix)), if do not supported, UE will lose cycle CQI/PMI/RI, feeding back ACK/NACK, if receive data at a plurality of carrier waves, do not support ACK/NACK and cycle CQI/PMI/RI to transmit in PUCCH, now UE always loses cycle CQI/PMI/RI, feeding back ACK/NACK.

In realizing process of the present invention, inventor finds to exist in prior art following technical problem:

At present in LTE-ARel-10 system, consider that CSI transmission capacity is limited, UE can only feed back the CSI of a descending carrier at a sub-frame of uplink, and consider that in LTE-A system, the feedback density of ACK/NACK and CSI is all larger, in current mechanism, it is also larger that CSI is dropped the probability not reporting, so base station can not obtain the CSI of a plurality of descending carriers in time, thereby affect descending scheduling accuracy.The CSI of a plurality of descending carriers of support transmits simultaneously and also there is no concrete scheme at present.

Summary of the invention

The embodiment of the present invention provides a kind of channel state information transmission method and equipment, the problem of how simultaneously transmitting for solving the CSI of a plurality of descending carriers.

A channel condition information CSI transmission method, the method comprises:

Terminal is determined the descending carrier that need to need to carry out CSI compression in a plurality of descending carriers of current sub-frame of uplink feedback CSI;

Described terminal is compressed the described CSI that need to carry out the descending carrier of CSI compression;

Described terminal current sub-frame of uplink to the CSI after compression corresponding to the descending carrier that needs to carry out CSI compression described in base station feedback and need to be in a plurality of descending carriers of current sub-frame of uplink feedback CSI CSI corresponding to descending carrier except the described descending carrier that need to carry out CSI compression.

A channel condition information CSI method of reseptance, the method comprises:

The descending carrier that need to need to carry out CSI compression in a plurality of descending carriers of current sub-frame of uplink feedback CSI of terminal is determined in base station;

The CSI number of bits of feedback after the compression that the described descending carrier that need to carry out CSI compression is corresponding is determined in base station;

Base station determine CSI number of bits of feedback after the compression that the descending carrier that need to carry out CSI compression of described terminal is corresponding, with described terminal need to be in a plurality of descending carriers of current sub-frame of uplink feedback CSI CSI number of bits of feedback sum corresponding to descending carrier except the described descending carrier that need to carry out CSI compression, for described terminal is in the CSI of current sub-frame of uplink actual feedback number of bits of feedback, and according to the CSI number of bits of feedback of described actual feedback, the CSI to described terminal in current sub-frame of uplink feedback decodes.

A terminal, this terminal comprises:

Determination module, for determining the descending carrier that need to need to carry out CSI compression at a plurality of descending carriers of current sub-frame of uplink feedback CSI;

Compression module, for compressing the described CSI that need to carry out the descending carrier of CSI compression;

Feedback module, for current sub-frame of uplink to the CSI after compression corresponding to the descending carrier that needs to carry out CSI compression described in base station feedback and need to be at a plurality of descending carriers of current sub-frame of uplink feedback CSI CSI corresponding to descending carrier except the described descending carrier that need to carry out CSI compression.

A base station, this base station comprises:

Carrier wave determination module, for determining the descending carrier that need to need to carry out CSI compression at a plurality of descending carriers of current sub-frame of uplink feedback CSI of terminal;

Bit number determination module, for determining the CSI number of bits of feedback after the compression that the described descending carrier that need to carry out CSI compression is corresponding;

Receiver module, for determining CSI number of bits of feedback after the compression that the descending carrier that need to carry out CSI compression of described terminal is corresponding, the CSI number of bits of feedback sum corresponding with a plurality of descending carriers that need to feed back CSI at current sub-frame of uplink of described terminal descending carrier except the described descending carrier that need to carry out CSI compression, for described terminal is in the CSI of current sub-frame of uplink actual feedback number of bits of feedback, and according to the CSI number of bits of feedback of described actual feedback, the CSI to described terminal in current sub-frame of uplink feedback decodes.

In the scheme that the embodiment of the present invention provides, terminal is determined the descending carrier that need to need to carry out CSI compression in a plurality of descending carriers of current sub-frame of uplink feedback CSI; The described CSI that need to carry out the descending carrier of CSI compression is compressed; And current sub-frame of uplink to the CSI after compression corresponding to the descending carrier that needs to carry out CSI compression described in base station feedback and need to be in a plurality of descending carriers of current sub-frame of uplink feedback CSI CSI corresponding to descending carrier except the described descending carrier that need to carry out CSI compression; Base station receives according to corresponding method the CSI transmitting on sub-frame of uplink.Visible, the present invention is compressed and has realized the CSI that simultaneously transmits a plurality of descending carriers at same sub-frame of uplink CSI by self adaptation, has solved technical problem to be solved by this invention.

Accompanying drawing explanation

Fig. 1 is carrier aggregation system schematic diagram of the prior art;

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

The other method schematic flow sheet that Fig. 3 provides for the embodiment of the present invention;

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

Another device structure schematic diagram that Fig. 5 provides for the embodiment of the present invention.

Embodiment

The problem of how simultaneously transmitting in order to solve the CSI of a plurality of descending carriers, the embodiment of the present invention provides a kind of CSI transmission method, in this method, after terminal is compressed the CSI that need to carry out the descending carrier of CSI compression determining, the CSI that the CSI and not needing after compression is carried out to the descending carrier of CSI compression transmits at current sub-frame of uplink simultaneously.

Referring to Fig. 2, the CSI transmission method that the embodiment of the present invention provides, comprises the following steps:

Step 20: terminal is determined the descending carrier that need to need to carry out CSI compression in a plurality of descending carriers of current sub-frame of uplink feedback CSI;

Step 21: terminal is compressed the described CSI that need to carry out the descending carrier of CSI compression;

Step 22: terminal current sub-frame of uplink to the CSI after compression corresponding to the descending carrier that needs to carry out CSI compression described in base station feedback and need to be in a plurality of descending carriers of current sub-frame of uplink feedback CSI CSI corresponding to descending carrier except the described descending carrier that need to carry out CSI compression.

In step 20, terminal is determined the descending carrier that need to need to carry out CSI compression in a plurality of descending carriers of current sub-frame of uplink feedback CSI, and its specific implementation can adopt a kind of in following three kinds of methods:

The first, terminal is the CSI reporting types of each descending carrier in a plurality of descending carriers of current sub-frame of uplink feedback CSI as required, determines the descending carrier that need to carry out CSI compression;

The second, terminal is determined and need in a plurality of descending carriers of current sub-frame of uplink feedback CSI, be belonged to the descending carrier in the descending carrier set that system is pre-defined or high-level signaling is pre-configured, for carrying out the descending carrier of CSI compression;

The 3rd, terminal is the priority of each descending carrier and/or the priority of CSI reporting types in a plurality of descending carriers of current sub-frame of uplink feedback CSI as required, determines the descending carrier that need to carry out CSI compression.

In above-mentioned first method, terminal is the definite descending carrier that need to carry out CSI compression of CSI reporting types of each descending carrier in a plurality of descending carriers of current sub-frame of uplink feedback CSI as required, and its specific implementation can be as follows:

Whether terminal judges need to surpass bit number threshold value by the CSI bit number corresponding to CSI reporting types of each descending carrier in a plurality of descending carriers of current sub-frame of uplink feedback CSI, if, determine and need to compress the CSI of descending carrier corresponding to this CSI reporting types, otherwise, determine and do not need the CSI of descending carrier corresponding to this CSI reporting types to compress.

Preferably, described bit number threshold value is 4 or 5.

In step 21, terminal is compressed the described CSI that need to carry out the descending carrier of CSI compression, can adopt following two kinds of methods:

Method one: when described CSI reporting types corresponding to descending carrier that need to carry out CSI compression comprises PMI information, terminal is given up the PMI information in CSI reporting types corresponding to this descending carrier, the CSI using remaining CSI after compression; Or,

Method two: when described CSI reporting types corresponding to descending carrier that need to carry out CSI compression comprises CQI information, terminal is given up the CQI information in CSI reporting types corresponding to this descending carrier, the CSI using remaining CSI after compression.

Preferably, when a pair of described CSI that need to carry out the descending carrier of CSI compression of terminal employing method compresses, terminal is also compressed many code words CQI corresponding to the described descending carrier of many codeword transmission, and concrete compression method is exemplified below:

Example one, terminal selects the CQI of a code word in many code words as the CSI after compressing, and gives up the CQI of all the other code words,

Example two, terminal is selected the CQI of a code word in many code words, and determines the indication information of the code word that the CQI of described selection is corresponding, and the CSI after compression using the CQI of described selection code word and described indication information gives up the CQI of all the other code words;

Example three, terminal is selected the CQI of a code word in many code words, and determines that the CQI of all the other code words is with respect to the 1 or 2 bit space difference values of the CQI of described selection code word, the CSI after compression using the CQI of described selection code word and described space parallax score value;

Example four, terminal is determined the average of the CQI of each code word in many code words, as the CSI after compression.

Concrete, terminal according to the making an appointment or high-level signaling that base station issues of base station, determine the CQI that selects which code word in many code words; Or,

Terminal, according to channel condition, is determined the CQI that selects which code word in many code words; Or,

Terminal with respect to the skew OFFSET value that reports the CQI of code word, is determined the CQI that selects which code word in many code words according to the predefined CQI that determines the code word of giving up for base station.

Preferably, when a pair of described CSI that need to carry out the descending carrier of CSI compression of terminal employing method compresses, if the CSI after compression comprises CQI, this CQI calculates according to fixing PMI.

Described fixing PMI is that a pre-configured PMI of high-level signaling is passed through in base station, or a PMI who makes an appointment for terminal and base station, or the PMI corresponding to descending carrier that need to carry out CSI compression reporting for terminal the last time.

Preferably, before the described CSI that need to carry out the descending carrier of CSI compression is compressed, the high-level signaling that terminal issues according to base station is chosen a kind of method from described two kinds of methods; And adopt the method for choosing, the described CSI that need to carry out the descending carrier of CSI compression is compressed.

Preferably, terminal is when compressing the described CSI that need to carry out the descending carrier of CSI compression, and first terminal can give up the CSI of the descending carrier that comprises subband CQI in CSI reporting types corresponding in the described descending carrier that need to carry out CSI compression.

Preferably, after step 21, before step 22, if described, need to carry out the CSI after compression that the descending carrier of CSI compression is corresponding, and need to be in a plurality of descending carriers of current sub-frame of uplink feedback CSI total CSI bit number of CSI corresponding to descending carrier except the described descending carrier that need to carry out CSI compression, surpass CSI transmission upper limit bit, terminal is according to the priority of the priority of each descending carrier in described a plurality of descending carriers and/or the CSI reporting types of each descending carrier, the CSI that need to feed back part descending carrier in a plurality of descending carriers of CSI in current subframe gives up, make the bit number of remaining CSI be no more than described CSI transmission upper limit bit, so, in step 22, terminal at current sub-frame of uplink, to base station feedback, carry out CSI give up after remaining CSI.

In step 22, terminal can be passed through Physical Uplink Control Channel (PUCCH) or Physical Uplink Shared Channel (PUSCH) to base station feedback CSI.

In this method, described CSI information can comprise: a kind of or combination in any in CQI information, PMI information, RI information, PTI information.

Referring to Fig. 3, the embodiment of the present invention provides a kind of CSI method of reseptance, comprises the following steps:

Step 30: the descending carrier that need to need to carry out CSI compression in a plurality of descending carriers of current sub-frame of uplink feedback CSI of terminal is determined in base station;

Step 31: the CSI number of bits of feedback after the compression that the described descending carrier that need to carry out CSI compression is corresponding is determined in base station;

Step 32: base station determine CSI number of bits of feedback after the compression that the descending carrier that need to carry out CSI compression of described terminal is corresponding, with described terminal need to be in a plurality of descending carriers of current sub-frame of uplink feedback CSI CSI number of bits of feedback sum corresponding to descending carrier except the described descending carrier that need to carry out CSI compression, for described terminal is in the CSI of current sub-frame of uplink actual feedback number of bits of feedback, and according to the CSI number of bits of feedback of described actual feedback, the CSI to described terminal in current sub-frame of uplink feedback decodes.

In step 30, the descending carrier that need to need to carry out CSI compression in a plurality of descending carriers of current sub-frame of uplink feedback CSI of terminal described in base station, its specific implementation can adopt a kind of in following three kinds of methods:

The first, base station according to described terminal need to be in a plurality of descending carriers of current sub-frame of uplink feedback CSI the CSI reporting types of each descending carrier, determine the descending carrier that need to carry out CSI compression;

The second, what described terminal was determined in base station need to belong to the descending carrier in the descending carrier set that system is pre-defined or high-level signaling is pre-configured in a plurality of descending carriers of current sub-frame of uplink feedback CSI, for carrying out the descending carrier of CSI compression;

The 3rd, base station according to described terminal need to be in a plurality of descending carriers of current sub-frame of uplink feedback CSI the priority of each descending carrier and/or the priority of CSI reporting types, determine the descending carrier that need to carry out CSI compression.

In above-mentioned first method, base station according to terminal need to be in a plurality of descending carriers of current sub-frame of uplink feedback CSI the CSI reporting types of each descending carrier, determine the descending carrier that need to carry out CSI compression, its specific implementation can be as follows:

Whether what base station judged described terminal need to surpass bit number threshold value by CSI bit number corresponding to the CSI reporting types of each descending carrier in a plurality of descending carriers of current sub-frame of uplink feedback CSI, if, determine the descending carrier of corresponding descending carrier for carrying out CSI compression, otherwise, determine the descending carrier of corresponding descending carrier for not needing to carry out CSI compression.

Preferably, described bit number threshold value is 4 or 5.

In step 31, the method for the CSI number of bits of feedback after the compression that the described descending carrier that need to carry out CSI compression is corresponding is determined in base station, specifically can adopt following two kinds of methods:

Method one: when described CSI reporting types corresponding to descending carrier that need to carry out CSI compression comprises PMI information, base station determines that described terminal gives up the PMI information in CSI reporting types corresponding to this descending carrier, the CSI number of bits of feedback using the number of bits of feedback of remaining CSI after compression; Or,

Method two: when described CSI reporting types corresponding to descending carrier that need to carry out CSI compression comprises CQI information, base station determines that described terminal gives up the CQI information in CSI reporting types corresponding to this descending carrier, the CSI number of bits of feedback using the number of bits of feedback of remaining CSI after compression.

Preferably, during CSI number of bits of feedback after base station employing method one is determined the compression that the described descending carrier that need to carry out CSI compression is corresponding, base station determines that the method for determining is exemplified below to the CSI number of bits of feedback after many code words CQI compression corresponding to the described descending carrier of many codeword transmission:

Example one, the CSI number of bits of feedback of the number of bits of feedback of the CQI of a code word after as compression in base station selected many code words, and judge that described terminal gives up the CQI of all the other code words;

Example two, the CSI number of bits of feedback of the number of bits of feedback of the CQI of a code word after as compression in base station selected many code words, and according to the CQI of definite all the other code words of predefined skew OFFSET value;

Example three, the CQI of a code word in base station selected many code words, and determine and in the CSI report of described descending carrier, to comprise the indication information that is used to indicate the code word that the CQI of selection is corresponding, CSI number of bits of feedback using the bit number sum of the number of bits of feedback of the CQI of described selection code word and described indication information after compression, and judge that described terminal gives up the CQI of all the other code words;

Example four, the CQI of a code word in base station selected many code words, and determine that in the CSI report of described descending carrier, comprising the CQI that is used to indicate all the other code words divides value information with respect to the space parallax of the CQI of described selection code word, the CSI number of bits of feedback of the bit number sum of dividing value information using the number of bits of feedback of the CQI of described selection code word and described space parallax after compression;

Example five, the number of bits of feedback that the average of the CQI of each code word in many code words is corresponding is determined in base station, as the CSI number of bits of feedback after compression.

Concrete, base station basis is made an appointment or according to notify the configuration to UE by high-level signaling, determines and select the CQI of which code word in many code words to determine the CSI number of bits of feedback after compression with terminal; Or base station, is determined and is selected the CQI of which code word in many code words to determine the CSI number of bits of feedback after compression with respect to skew (OFFSET) value that reports the CQI of code word according to the predefined CQI for definite code word of giving up.

Preferably, during CSI number of bits of feedback after base station employing method one is determined the compression that the described descending carrier that need to carry out CSI compression is corresponding, if the CSI after compression comprises CQI, base station determines that this CQI calculates according to fixing PMI.

Described fixing PMI is that a pre-configured PMI of high-level signaling is passed through in base station, or a PMI who makes an appointment for base station and terminal, or the described PMI corresponding to descending carrier that need to carry out CSI compression reporting for terminal the last time.

Preferably, before the CSI number of bits of feedback after determining the compression that the described descending carrier that need to carry out CSI compression is corresponding, a kind of method is chosen in base station from described two kinds of methods, by high-level signaling, sends to described terminal; And adopt the method choose, determine the CSI number of bits of feedback after the compression that the described descending carrier that need to carry out CSI compression is corresponding.

Preferably, between step 31 and step 32, the CSI of the base station descending carrier that further the described UE of judgement comprises subband CQI by CSI reporting types corresponding in described a plurality of descending carriers gives up, and according to the descending carrier of removing in described a plurality of descending carriers beyond the descending carrier that described CSI reporting types comprises subband CQI, determines the CSI number of bits of feedback after compression.Also the descending carrier that, base station comprises subband CQI by CSI reporting types corresponding in the descending carrier that need to carry out CSI compression of determining in step 31 is given up; Accordingly, in step 31, the CSI number of bits of feedback after the compression that remaining each descending carrier that need to carry out CSI compression is corresponding is determined in base station; In step 32 base station determine CSI number of bits of feedback after the compression that the described remaining descending carrier that need to carry out CSI compression is corresponding, with need to be in a plurality of descending carriers of current sub-frame of uplink feedback CSI CSI number of bits of feedback sum corresponding to descending carrier except the described descending carrier that need to carry out CSI compression, for described terminal is in the CSI of current sub-frame of uplink actual feedback number of bits of feedback, and according to the CSI number of bits of feedback of described actual feedback, the CSI to terminal in current sub-frame of uplink feedback decodes.

Preferably, in step 32, in base station according to the CSI number of bits of feedback of definite actual feedback, before the CSI that terminal is fed back at current sub-frame of uplink decodes, if described, need to carry out the CSI number of bits of feedback after compression that the descending carrier of CSI compression is corresponding, and need to be in a plurality of descending carriers of current sub-frame of uplink feedback CSI CSI number of bits of feedback sum corresponding to descending carrier except the described descending carrier that need to carry out CSI compression, surpass CSI transmission upper limit bit, base station is according to the priority of each descending carrier in described a plurality of descending carriers and/or the priority of CSI reporting types, judge that described terminal gives up the CSI of the part descending carrier in described a plurality of descending carriers, make the total bit number of CSI of remaining descending carrier be no more than described CSI transmission upper limit bit, and by the total number of bits of feedback of the CSI of remaining descending carrier, redefine as described terminal is in the CSI of current sub-frame of uplink actual feedback number of bits of feedback, so, in step 32, base station is according to the described terminal redefining in the CSI of current sub-frame of uplink actual feedback number of bits of feedback, and the CSI to terminal in current sub-frame of uplink feedback decodes.

In step 32, base station can receive by PUCCH or PUSCH the CSI of described terminal feedback.

In this method, described CSI information comprises: a kind of or combination in any in CQI information, PMI information, RI information, PTI information.

The mutual implementation method of end side of the present invention and base station side is as follows:

First, terminal is determined the descending carrier that need to need to carry out CSI compression in a plurality of descending carriers of current sub-frame of uplink feedback CSI; The described CSI that need to carry out the descending carrier of CSI compression is compressed; Current sub-frame of uplink to the CSI after compression corresponding to the descending carrier that needs to carry out CSI compression described in base station feedback and need to be in a plurality of descending carriers of current sub-frame of uplink feedback CSI CSI corresponding to descending carrier except the described descending carrier that need to carry out CSI compression.

Then, the descending carrier that need to need to carry out CSI compression in a plurality of descending carriers of current sub-frame of uplink feedback CSI of terminal is determined in base station; Determine the CSI number of bits of feedback after the compression that the described descending carrier that need to carry out CSI compression is corresponding; Determine CSI number of bits of feedback after the compression that the descending carrier that need to carry out CSI compression of described terminal is corresponding, with described terminal need to be in a plurality of descending carriers of current sub-frame of uplink feedback CSI CSI number of bits of feedback sum corresponding to descending carrier except the described descending carrier that need to carry out CSI compression, for described terminal is in the CSI of current sub-frame of uplink actual feedback number of bits of feedback, and according to the CSI number of bits of feedback of described actual feedback, the CSI to terminal in current sub-frame of uplink feedback decodes.

Below invention is specifically described:

The present invention can be applied in LTE-A CA system, UE polymerization under the scene of a plurality of descending carriers.

Step 1:UE determines the descending carrier that need to carry out CSI compression, specific as follows:

Method A:UE is the CSI reporting types (Reporting Type) of each descending carrier in a plurality of descending carriers of current sub-frame of uplink feedback CSI as required, determines the descending carrier that need to carry out CSI compression;

Method B:UE determines that the descending carrier that need to belong in the descending carrier set that system is pre-defined or high-level signaling is pre-configured in a plurality of descending carriers of current sub-frame of uplink feedback CSI is the descending carrier that need to carry out CSI compression; The descending carrier that needs to carry out CSI compression is predefined in system or high-level signaling is pre-configured, and UE only compresses the CSI of these descending carriers; Subset in described system in pre-defined or descending carrier set that the pre-configured descending carrier set of high-level signaling can configure for UE/activate or complete or collected works;

Method C:UE is the priority of each descending carrier and/or the definite descending carrier that need to carry out CSI compression of the priority of CSI reporting types in a plurality of descending carriers of current sub-frame of uplink feedback CSI as required, for example: preferentially compress the descending carrier that priority is low and/or there is the CSI of descending carrier of the CSI reporting types of low priority, wherein descending carrier priority can be for predefined in system, or high-level signaling configuration, or according to carrier index definition, wherein CSI reporting types priority can be for predefined in system, or high-level signaling configuration, or be to determine according to CSI information type corresponding to this CSI reporting types, for example, in system, the priority of pre-defined CSI reporting types is: Types 3, 5, 6, 2a has limit priority, secondly be Types 2, 2b, 2c, 4, that priority is minimum is Types 1, 1a, again for example, the reporting types priority that comprises RI information is the highest (as Type 3, 5, 6), secondly for the reporting types that comprises broadband CQI is (as Type 2, 2b, 2c, 4), secondly for the reporting types that comprises subband CQI is (as Type 1, the reporting types that 1a) or only comprises PMI (as Type 2a).

When employing method A, the method specifically comprises:

The CSI number of bits of feedback comprising for CSI reporting types is no more than the descending carrier of T bit, its CSI is not compressed; T=4 or 5 preferably;

For example, when T=4, the described reporting types of not compressing comprises Type 3,4,6,2a;

Again for example, when T=5, the described reporting types of not compressing comprises Type 3,4,5,6,2a;

The descending carrier that the CSI number of bits of feedback comprising for CSI reporting types surpasses T bit, compresses its CSI;

For example, when T=4, the reporting types that described needs compress comprises Type 1,1a, 2,2b, 2c, 5;

Again for example, when T=5, the reporting types that described needs compress comprises Type 1,1a, 2,2b, 2c;

Step 2:UE compresses the CSI that need to carry out the descending carrier of CSI compression determining, and specifically can adopt 1-method 3 with the following method:

Method 1: give up (Drop) PMI;

For the reporting types that comprises CQI and PMI, drop PMI, only reports CQI, and the PMI of this CQI based on fixing calculates;

Described fixedly PMI can be 1 pre-configured PMI of high-level signaling, or is a PMI who makes an appointment in UE and base station, or is the last PMI that this descending carrier is corresponding that reports;

The above-mentioned reporting types that comprises CQI and PMI, is specifically as follows Type 1,1a, 2,2b, 2c, can be applicable to the reporting types of all CQI of comprising and PMI, does not distinguish broadband CQI and subband CQI; Or, be Type 2,2b, 2c, be only applied to the reporting types that comprises broadband CQI;

For the reporting types that comprises RI, drop PMI, only reports RI, RI independent numbering;

The above-mentioned reporting types that comprises RI, is specifically as follows Type 5;

Preferably, while compressing for the reporting types that comprises RI, can only for 4 layers (Layer) and 8 layers of transmission situation, use above-mentioned compression scheme;

Preferably, for the reporting types that comprises CQI, also A-method E compresses (during RI > 1) to many code words CQI in accordance with the following methods:

Method A: only report the CQI of a code word, the CQI of another code word of drop;

Specifically report the CQI of which code word to make an appointment for UE and base station, or high-rise prenoticing; For example, agreement or notice UE only report the CQI of code word 0, the CQI of drop code word 1;

Method B: only report the CQI of 1 code word, increase code word corresponding to CQI reporting described in the indication of extra indication information; For example, while adopting 1 bit indication information, the corresponding relation of 1 bit indication information and code word is as shown in table 2, and table 2 is an example just, does not get rid of other corresponding relations;

The described CQI of code word that reports can be for having the CQI value (being the CQI value of the code word that CQI index is larger) of the code word of better channel condition in a plurality of code words;

1 bit indication information	The codeword number of indication
		0	0
1	1

The corresponding relation of table 21 bit indication information and code word

Method C: only report the CQI of 1 code word, the offset value that the CQI of another code word can be based on fixing obtains is that described offset value can be made an appointment for UE and base station or high-level signaling is pre-configured;

Specifically report the CQI value of which code word to make an appointment for UE and base station, or high-rise prenoticing, relevant to the definition of offset; For example, if offset is defined as negative value, illustrate that the CQI of the code word not reporting is than the CQI that reports code word poor (index is little), should arrange or configure the CQI value (being the CQI value of the code word that CQI index is larger) that reports the code word in a plurality of code words with better channel condition; If offset be defined as on the occasion of, illustrate that the CQI of the code word not reporting is than the CQI that reports code word good (index is large), should arrange or configure the CQI value (being the CQI value of the code word that CQI index is less) that reports the code word in a plurality of code words with poor channel conditions;

Method D: report the CQI of 1 code word, and the 1or 2 bit space difference values of the CQI of another code word based on reporting the CQI of code word;

Specifically report the CQI value of which code word to make an appointment for UE and base station, or high-rise prenoticing, for example, agreement or notice UE report the CQI of code word 0, and the CQI of code word 1 adopts space differential mode to represent the offset level (offset level) with respect to the CQI of code word 0: the CQI index of the CQI index-code word 1 of code word 1 offset level=code word 0, the corresponding relation of 1 bit space difference value and code word 1 offset level is as shown in table 3, when this 1 bit space difference value is received in base station, the CQI index that can judge the code word that UE do not report lower than or higher than the CQI index that reports code word, but can not obtain, do not report code word CQI value accurately, base station can estimate the CQI that does not report code word in conjunction with UE transmission channel situation, the corresponding relation of 2 bit space difference values and code word 1 offset level is as shown in table 4, when base station receives that this 2 bit space difference value is 0 or 1, can directly according to space parallax score value, obtain the CQI that does not report code word, it is CQI index-code word 1 offset level (i.e. 2 bit space difference values) of the CQI index=code word 0 of code word 1, when base station receives that this 2 bit space difference value is 2 or 3, can judge the CQI index of the code word that UE do not report lower than 2 or 2 the above values of CQI index that report code word, or higher than 1 or 1 the above value of CQI index that reports code word, but can not obtain, do not report code word CQI value accurately, base station can estimate the CQI that does not report code word in conjunction with UE transmission channel situation, wherein, table 3 and table 4 are only corresponding relation example, do not get rid of other corresponding relations,

1 bit space difference value	Offset level
		0	≥0
1	＜0

The corresponding relation of table 31 bit space difference value and offset level

2 bit space difference values	Offset level
		0	0
1	1
		2	≥2
3	≤-1

The corresponding relation of table 42 bit space difference values and offset level

Method E: the average that reports the CQI of 2 code words;

Be that UE obtains respectively CQI index corresponding to each code word, CQI average=(the CQI index of the CQI index+ code word 1 of code word 0)/2; When base station receives this average, CQI value that can be using this average as each code word or adjusted and compensated by self adaptation, estimates the CQI value of each code word, for descending scheduling reference;

Method 2:Drop CQI, only transmits PMI; Which is only applicable to the reporting types that comprises CQI;

PMI can further adopt the PMI reporting in the pre-configured PMI codebook subset (codebook subset) of high-level signaling to reduce number of bits of feedback, the PMI index independent numbering in this PMI subset of code words;

Method 3: the pre-configured UE of high-level signaling need to carry out reporting types transmission or which kind of channel information of drop of CSI compression to this type of;

Be that CSI compression method that UE adopts is a kind of in the method 1 of high-level signaling configuration and method 2, UE need to first receive high-level signaling, CSI is compressed after parsing corresponding collocation method again; When high-level signaling configuration UE drop PMI, 1 mode is worked according to the method described above; When high-level signaling configuration UE drop CQI, according to method 2 modes, work;

In addition, while adopting any one method in above-mentioned 3 kinds of methods to carry out CSI compression, it for CSI reporting types, is the descending carrier of the reporting types that comprises subband CQI, preferably, the CSI of this descending carrier of drop, be that UE does not need the CSI of descending carrier corresponding to reporting types to comprising subband CQI to carry out above-mentioned compression step, the direct CSI of this descending carrier of drop;

The above-mentioned reporting types that comprises subband CQI, is specifically as follows Type 1,1a.

Especially, if after above-mentioned compression, the CSI feedback bits sum of a plurality of descending carriers still surpasses CSI transmission upper limit bit, need further to accept or reject according to reporting types priority and/or descending carrier priority, choosing the CSI feedback information that has the descending carrier of the higher CSI reporting types of priority and/or have higher priority descending carrier transmits, abandon successively the descending carrier with the lower CSI reporting types of priority and/or the CSI feedback information with lower priority descending carrier, until total bit number of CSI feedback information is no more than CSI transmission upper limit bit,

Above-mentioned CSI transmission upper limit bit is that system is predefined, or high-level signaling/PDCCH signal deployment, or make an appointment in UE and base station, or for UE determines according to the PUCCH format that uses of transmission CSI, or according to CSI and ACK/NACK and/or dispatch request (SR), transmit the PUCCH format that uses and the bit number of the ACK/NACK that simultaneously transmits at same sub-frame of uplink with CSI and/or SR is definite for UE simultaneously;

Preferably, above-mentioned CSI transmission upper limit bit is the arbitrary integer that is no more than the maximum transmitted bit number A of the PUCCH format that transmission CSI uses; Or, for being no more than arbitrary integer of A-K bit, wherein A is the maximum transmitted bit number that CSI and ACK/NACK and/or SR transmit used PUCCH format simultaneously, and K is the ACK/NACK that simultaneously transmits at same sub-frame of uplink with CSI and/or the bit number of SR;

Preferably, carrier wave priority defines based on carrier index, and the carrier wave priority for example with minimum carrier index is the highest; Or carrier wave priority can be also predefined in system (being to make an appointment in UE and base station), or for high-level signaling configuration;

Preferably, can define priority according to the CSI information type of transmitting in reporting types;

For example, the reporting types priority that comprises RI information is the highest (as Type 3,5,6), secondly for the reporting types that comprises broadband CQI (as Type 2,2b, 2c, 4), secondly for the reporting types that comprises subband CQI (as Type 1, the reporting types that 1a) or only comprises PMI (as Type 2a);

The priority of reporting types also can be for system is predefined or high-level signaling is pre-configured, and for example, the priority of CSI reporting types is: Types 3,5,6,2a has limit priority, is secondly Types2,2b, 2c, 4, that priority is minimum is Types 1,1a;

Step 3:UE at current sub-frame of uplink, to base station feedback, need to carry out CSI after compression that the descending carrier of CSI compression is corresponding and need to be in a plurality of descending carriers of current sub-frame of uplink feedback CSI CSI corresponding to descending carrier except the described descending carrier that need to carry out CSI compression.

Base station side adopts the mode consistent with UE side to determine that UE is in the CSI of current sub-frame of uplink actual feedback number of bits of feedback, and according to the CSI number of bits of feedback of described actual feedback, the CSI of terminal feedback is decoded.

Above-mentioned CSI information comprises the one or any combination in CQI, PMI, RI, PTI;

Above-mentioned high-level signaling can be radio resource control RRC (Radio Resource Control) or media access control MAC (Media Access Control) signaling, or physical downlink control channel PDCCH signaling;

It should be noted that, while there is ACK/NACK feedback information and/or SR information in the sub-frame of uplink that has CSI transmission simultaneously, said method is applicable equally, can support CSI feedback information and ACK/NACK feedback information and/or the SR information consolidation coding transmission of multicarrier, for example adopt PUCCH format2/2a/2b/3, or the PUCCH format 3 of expansion, or other schemes.

It should be noted that, said method is not only applicable to the transmission of cycle CSI feedback information on PUCCH, goes for equally the transmission of cycle CSI feedback information on PUSCH.

It should be noted that, the compression transmitting method of multicarrier CSI in above-mentioned LTE-A CA system goes for cooperative multipoint transmission (Coordinated Multi-Point Transmission equally, CoMP) scene needs the CSI of a plurality of transfer points of feedback can be equal to the CSI of above-mentioned a plurality of carrier waves in CoMP transmission.

Referring to Fig. 4, the embodiment of the present invention provides a kind of terminal, and this terminal comprises:

Determination module 40, for determining the descending carrier that need to need to carry out CSI compression at a plurality of descending carriers of current sub-frame of uplink feedback CSI;

Compression module 41, for compressing the described CSI that need to carry out the descending carrier of CSI compression;

Feedback module 42, for current sub-frame of uplink to the CSI after compression corresponding to the descending carrier that needs to carry out CSI compression described in base station feedback and need to be at a plurality of descending carriers of current sub-frame of uplink feedback CSI CSI corresponding to descending carrier except the described descending carrier that need to carry out CSI compression.

Further, described determination module 40 for:

The CSI reporting types of each descending carrier in a plurality of descending carriers of current sub-frame of uplink feedback CSI, determines the descending carrier that need to carry out CSI compression as required; Or,

Determine and need in a plurality of descending carriers of current sub-frame of uplink feedback CSI, belong to the descending carrier in the descending carrier set that system is pre-defined or high-level signaling is pre-configured, for carrying out the descending carrier of CSI compression; Or,

The priority of each descending carrier and/or the priority of CSI reporting types in a plurality of descending carriers of current sub-frame of uplink feedback CSI, determine the descending carrier that need to carry out CSI compression as required.

Described determination module 40 for:

The CSI reporting types of each descending carrier in a plurality of descending carriers of current sub-frame of uplink feedback CSI as required as follows, determine the descending carrier that need to carry out CSI compression:

Whether judgement need to surpass bit number threshold value by the CSI bit number corresponding to CSI reporting types of each descending carrier in a plurality of descending carriers of current sub-frame of uplink feedback CSI, if, determine and need to compress the CSI of descending carrier corresponding to this CSI reporting types, otherwise, determine and do not need the CSI of descending carrier corresponding to this CSI reporting types to compress.

Further, described bit number threshold value is 4 or 5.

Further, described compression module 41 for: as follows one or method two the described CSI that need to carry out the descending carrier of CSI compression is compressed:

Method one: when described CSI reporting types corresponding to descending carrier that need to carry out CSI compression comprises pre-coding matrix indication PMI information, the PMI information in CSI reporting types corresponding to this descending carrier is given up to the CSI using remaining CSI after compression;

Method two: when described CSI reporting types corresponding to descending carrier that need to carry out CSI compression comprises channel quality indicator CQI information, the CQI information in CSI reporting types corresponding to this descending carrier is given up to the CSI using remaining CSI after compression.

Further, described compression module 41 also for: when a pair of described CSI that need to carry out the descending carrier of CSI compression of employing method compresses, the many code word CQI corresponding to the described descending carrier of many codeword transmission compresses, and comprising:

Select the CQI of a code word in many code words as the CSI after compressing, give up the CQI of all the other code words; Or,

Select the CQI of a code word in many code words, and determine the indication information of the code word that the CQI of described selection is corresponding, the CSI after compression using the CQI of described selection code word and described indication information, gives up the CQI of all the other code words; Or,

Select the CQI of a code word in many code words, and determine that the CQI of all the other code words is with respect to the 1 or 2 bit space difference values of the CQI of described selection code word, the CSI after compression using the CQI of described selection code word and described space parallax score value; Or,

Determine the average of the CQI of each code word in many code words, as the CSI after compression.

Further, described compression module 41 for:

According to the making an appointment or high-level signaling that base station issues of base station, determine the CQI that selects which code word in many code words; Or,

According to channel condition, determine the CQI that selects which code word in many code words; Or,

According to the predefined CQI that determines the code word of giving up for base station, with respect to the skew OFFSET value that reports the CQI of code word, determine the CQI that selects which code word in many code words.

Further, described compression module 41 also for:

When a pair of described CSI that need to carry out the descending carrier of CSI compression of employing method compresses, if the CSI after compression comprises CQI, according to fixing PMI, calculate this CQI.

Further, described fixing PMI is that a pre-configured PMI of high-level signaling is passed through in base station, or a PMI who makes an appointment for terminal and base station, or the described PMI corresponding to descending carrier that need to carry out CSI compression reporting for terminal the last time.

Further, described compression module 41 also for:

Before the described CSI that need to carry out the descending carrier of CSI compression is compressed, the high-level signaling issuing according to base station is chosen a kind of method from described two kinds of methods; The method that employing is chosen, compresses the described CSI that need to carry out the descending carrier of CSI compression.

Further, described compression module 41 also for:

When the described CSI that need to carry out the descending carrier of CSI compression is compressed, give up the CSI of the descending carrier that comprises subband CQI in CSI reporting types corresponding in the described descending carrier that need to carry out CSI compression.

Further, this terminal also comprises:

Give up module 43, for the CSI after compression corresponding to the described descending carrier that need to carry out CSI compression, and need to be in a plurality of descending carriers of current sub-frame of uplink feedback CSI total CSI bit number of CSI corresponding to descending carrier except the described descending carrier that need to carry out CSI compression, while surpassing CSI transmission upper limit bit, according to the priority of the priority of each descending carrier in described a plurality of descending carriers and/or the CSI reporting types of each descending carrier, the CSI that need to feed back part descending carrier in a plurality of descending carriers of CSI in current subframe gives up, make the bit number of remaining CSI be no more than described CSI transmission upper limit bit,

Described feedback module 42 for: at current sub-frame of uplink, to base station feedback, carry out CSI give up after remaining CSI.

Further, described feedback module 42 for: by PUCCH or PUSCH to base station feedback CSI.

Described CSI information comprises: a kind of or combination in any in CQI information, PMI information, RI information, PTI information.

Referring to Fig. 5, the embodiment of the present invention also provides a kind of base station, and this base station comprises:

Carrier wave determination module 50, for determining the descending carrier that need to need to carry out CSI compression at a plurality of descending carriers of current sub-frame of uplink feedback CSI of terminal;

Bit number determination module 51, for determining the CSI number of bits of feedback after the compression that the described descending carrier that need to carry out CSI compression is corresponding;

Receiver module 52, for the CSI number of bits of feedback after compression corresponding to the described descending carrier that need to carry out CSI compression of determining terminal, the CSI number of bits of feedback sum corresponding with a plurality of descending carriers that need to feed back CSI at current sub-frame of uplink of described terminal descending carrier except the described descending carrier that need to carry out CSI compression, for described terminal is in the CSI of current sub-frame of uplink actual feedback number of bits of feedback, and according to the CSI number of bits of feedback of described actual feedback, the CSI to described terminal in current sub-frame of uplink feedback decodes.

Further, described carrier wave determination module 50 for:

According to described terminal need to be in a plurality of descending carriers of current sub-frame of uplink feedback CSI the CSI reporting types of each descending carrier, determine the descending carrier that need to carry out CSI compression of described terminal; Or,

That determines described terminal need to belong to the descending carrier in the descending carrier set that system is pre-defined or high-level signaling is pre-configured in a plurality of descending carriers of current sub-frame of uplink feedback CSI, is the descending carrier that need to carry out CSI compression of described terminal; Or,

According to described terminal need to be in a plurality of descending carriers of current sub-frame of uplink feedback CSI the priority of each descending carrier and/or the priority of CSI reporting types, determine the descending carrier that need to carry out CSI compression of described terminal.

Described carrier wave determination module 50 for:

As follows according to described terminal need to be in a plurality of descending carriers of current sub-frame of uplink feedback CSI the CSI reporting types of each descending carrier, determine the descending carrier that need to carry out CSI compression of described terminal:

Whether what judge described terminal need to surpass bit number threshold value by the CSI bit number corresponding to CSI reporting types of each descending carrier in a plurality of descending carriers of current sub-frame of uplink feedback CSI, if, determine the descending carrier of corresponding descending carrier for carrying out CSI compression, otherwise, determine the descending carrier of corresponding descending carrier for not needing to carry out CSI compression.

Further, described bit number threshold value is 4 or 5.

Further, described bit number determination module 51 for: as follows one or method two determine the CSI number of bits of feedback after the compression that the described descending carrier that need to carry out CSI compression is corresponding:

Method one: when described CSI reporting types corresponding to descending carrier that need to carry out CSI compression comprises pre-coding matrix indication PMI information, determine that described terminal gives up the PMI information in CSI reporting types corresponding to this descending carrier, the CSI number of bits of feedback using the number of bits of feedback of remaining CSI after compression;

Method two: when described CSI reporting types corresponding to descending carrier that need to carry out CSI compression comprises channel quality indicator CQI information, determine that described terminal gives up the CQI information in CSI reporting types corresponding to this descending carrier, the CSI number of bits of feedback using the number of bits of feedback of remaining CSI after compression.

Further, described bit number determination module 51 also for: during CSI number of bits of feedback after employing method one is determined the compression that the described descending carrier that need to carry out CSI compression is corresponding, determine the CSI number of bits of feedback after many code words CQI compression corresponding to the described descending carrier of many codeword transmission, comprising:

The CSI number of bits of feedback of the number of bits of feedback of selecting the CQI of a code word in many code words after as compression, and judge that described terminal gives up the CQI of all the other code words; Or,

Select the number of bits of feedback of the CQI of a code word in many code words as the CSI number of bits of feedback after compressing, and according to predefined skew OFFSET value, determine the CQI of all the other code words; Or,

Select the CQI of a code word in many code words, and determine and in the CSI report of described descending carrier, to comprise the indication information that is used to indicate the code word that the CQI of selection is corresponding, CSI number of bits of feedback using the bit number sum of the number of bits of feedback of the CQI of described selection code word and described indication information after compression, and judge that described terminal gives up the CQI of all the other code words; Or,

Select the CQI of a code word in many code words, and determine in the CSI report of described descending carrier and comprise and be used to indicate the CQI of all the other code words with respect to the 1 or 2 bit space difference value information of the CQI of described selection code word, the CSI number of bits of feedback of the bit number sum of dividing value information using the number of bits of feedback of the CQI of described selection code word and described space parallax after compression; Or,

Determine number of bits of feedback corresponding to average of the CQI of each code word in many code words, as the CSI number of bits of feedback after compression.

Further, described bit number determination module 51 for:

According to the making an appointment or according to notify the configuration information to described terminal by high-level signaling, determine to select the CQI of which code word in many code words to determine the CSI number of bits of feedback after compressing of described terminal; Or,

According to the predefined CQI for definite code word of giving up, with respect to the skew OFFSET value that reports the CQI of code word, determine and select the CQI of which code word in many code words to determine the CSI number of bits of feedback after compression.

Further, described bit number determination module 51 for:

During CSI number of bits of feedback after employing method one is determined the compression that the described descending carrier that need to carry out CSI compression is corresponding, if the CSI after compression comprises CQI, determine that this CQI calculates according to fixing PMI.

Further, described fixing PMI is that described base station is by a pre-configured PMI of high-level signaling, or be the PMI that described base station and described terminal are made an appointment, or be the described PMI corresponding to descending carrier that need to carry out CSI compression reporting described terminal the last time.

Further, described bit number determination module 51 also for:

Before CSI number of bits of feedback after determining the compression that the described descending carrier that need to carry out CSI compression is corresponding, from described two kinds of methods, choose a kind of method, by high-level signaling, send to described terminal; The method that employing is chosen, determines the CSI number of bits of feedback after the compression that the described descending carrier that need to carry out CSI compression is corresponding.

Further, described bit number determination module 51 also for:

The CSI that judges the descending carrier that described terminal comprises subband CQI by CSI reporting types corresponding in described a plurality of descending carriers gives up, and according to the descending carrier of removing in described a plurality of descending carriers beyond the descending carrier that described CSI reporting types comprises subband CQI, determines the CSI number of bits of feedback after compression.

Further, this base station also comprises:

Give up module 53, for the CSI number of bits of feedback after compression corresponding to the descending carrier that need to carry out CSI compression of described terminal, and described terminal need to be in a plurality of descending carriers of current sub-frame of uplink feedback CSI CSI number of bits of feedback sum corresponding to descending carrier except the described descending carrier that need to carry out CSI compression, while surpassing CSI transmission upper limit bit, according to the priority of each descending carrier in described a plurality of descending carriers and/or the priority of CSI reporting types, judge that described terminal gives up the CSI of the part descending carrier in described a plurality of descending carriers, make the total bit number of CSI of remaining descending carrier be no more than described transmission upper limit bit, and by the total number of bits of feedback of the CSI of remaining descending carrier, redefine as described terminal is in the CSI of current sub-frame of uplink actual feedback number of bits of feedback,

Described receiver module 52 is given up described terminal that module redefines in the CSI of current sub-frame of uplink actual feedback number of bits of feedback for: described basis, and the CSI to described terminal in current sub-frame of uplink feedback decodes.

Further, described receiver module 52 is for the CSI that receives described terminal feedback by PUCCH or PUSCH.

Further, described CSI information comprises: a kind of or combination in any in CQI information, PMI information, RI information, PTI information.

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

The present invention has provided a kind of method that CSI feedback information to a plurality of descending carriers compresses transmission, the method can be compressed the CSI feedback information of partial carrier wave according to the reporting types selectivity of multicarrier CSI information, to reduce the total number of bits of feedback of CSI, thereby support multicarrier CSI to transmit simultaneously, to improve the efficiency of transmission of CSI information, and then make base station can obtain in time the CSI information of multicarrier, improve the accuracy of descending scheduling.

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. a channel condition information CSI transmission method, is characterized in that, the method comprises:

Described terminal to the described CSI that need to carry out the descending carrier of CSI compression compress described terminal current sub-frame of uplink to the CSI after compression corresponding to the descending carrier that needs to carry out CSI compression described in base station feedback and need to be in a plurality of descending carriers of current sub-frame of uplink feedback CSI CSI corresponding to descending carrier except the described descending carrier that need to carry out CSI compression;

Wherein, described terminal is determined the descending carrier that need to need to carry out CSI compression in a plurality of descending carriers of current sub-frame of uplink feedback CSI, comprise: described terminal is the CSI reporting types of each descending carrier in a plurality of descending carriers of current sub-frame of uplink feedback CSI as required, determines the descending carrier that need to carry out CSI compression; Or described terminal is determined and need to be belonged to the descending carrier in the descending carrier set that system is pre-defined or high-level signaling is pre-configured in a plurality of descending carriers of current sub-frame of uplink feedback CSI, for carrying out the descending carrier of CSI compression; Or described terminal is the priority of each descending carrier and/or the priority of CSI reporting types in a plurality of descending carriers of current sub-frame of uplink feedback CSI as required, determines the descending carrier that need to carry out CSI compression.

2. the method for claim 1, is characterized in that, described terminal is the CSI reporting types of each descending carrier in a plurality of descending carriers of current sub-frame of uplink feedback CSI as required, determines the descending carrier that need to carry out CSI compression, comprising:

Whether described terminal judges need to surpass bit number threshold value by the CSI bit number corresponding to CSI reporting types of each descending carrier in a plurality of descending carriers of current sub-frame of uplink feedback CSI, if, determine and need to compress the CSI of descending carrier corresponding to this CSI reporting types, otherwise, determine and do not need the CSI of descending carrier corresponding to this CSI reporting types to compress.

3. method as claimed in claim 2, is characterized in that, described bit number threshold value is 4 or 5.

4. the method for claim 1, is characterized in that, the method that described terminal is compressed the described CSI that need to carry out the descending carrier of CSI compression, comprising:

Method one: when described CSI reporting types corresponding to descending carrier that need to carry out CSI compression comprises pre-coding matrix indication PMI information, described terminal is given up the PMI information in CSI reporting types corresponding to this descending carrier, the CSI using remaining CSI after compression; Or,

Method two: when described CSI reporting types corresponding to descending carrier that need to carry out CSI compression comprises channel quality indicator CQI information, described terminal is given up the CQI information in CSI reporting types corresponding to this descending carrier, the CSI using remaining CSI after compression.

5. method as claimed in claim 4, it is characterized in that, when a pair of described CSI that need to carry out the descending carrier of CSI compression of described terminal employing method compresses, described terminal is also compressed many code words CQI corresponding to the described descending carrier of many codeword transmission, comprising:

Described terminal selects the CQI of a code word in many code words as the CSI after compressing, and gives up the CQI of all the other code words; Or,

Described terminal is selected the CQI of a code word in many code words, and determines the indication information of the code word that the CQI of described selection is corresponding, and the CSI after compression using the CQI of described selection code word and described indication information gives up the CQI of all the other code words; Or,

Described terminal is selected the CQI of a code word in many code words, and determines that the CQI of all the other code words is with respect to the 1 or 2 bit space difference values of the CQI of described selection code word, the CSI after compression using the CQI of described selection code word and described space parallax score value; Or,

Described terminal is determined the average of the CQI of each code word in many code words, as the CSI after compression.

6. method as claimed in claim 5, is characterized in that, described terminal according to the making an appointment or high-level signaling that base station issues of base station, determine the CQI that selects which code word in many code words; Or,

Described terminal, according to channel condition, is determined the CQI that selects which code word in many code words; Or,

Described terminal with respect to the skew OFFSET value that reports the CQI of code word, is determined the CQI that selects which code word in many code words according to the predefined CQI that determines the code word of giving up for base station.

7. method as claimed in claim 4, is characterized in that, when a pair of described CSI that need to carry out the descending carrier of CSI compression of described terminal employing method compresses, if the CSI after compression comprises CQI, this CQI calculates according to fixing PMI.

8. method as claimed in claim 7, it is characterized in that, described fixing PMI is that a pre-configured PMI of high-level signaling is passed through in base station, or be a PMI who makes an appointment in described terminal and base station, or be the described PMI corresponding to descending carrier that need to carry out CSI compression reporting described terminal the last time.

9. method as claimed in claim 4, is characterized in that, before the described CSI that need to carry out the descending carrier of CSI compression is compressed, further comprises:

The high-level signaling that described terminal issues according to base station is chosen a kind of method from described two kinds of methods;

Described terminal is compressed and is comprised the described CSI that need to carry out the descending carrier of CSI compression:

Described terminal adopts the method for choosing, and the described CSI that need to carry out the descending carrier of CSI compression is compressed.

10. the method for claim 1, is characterized in that, described terminal, when the described CSI that need to carry out the descending carrier of CSI compression is compressed, further comprises:

Terminal is given up the CSI of the descending carrier that comprises subband CQI in CSI reporting types corresponding in the described descending carrier that need to carry out CSI compression.

11. as the method as described in arbitrary in claim 1-10, it is characterized in that, in described terminal at current sub-frame of uplink to the CSI after compression corresponding to the descending carrier that needs to carry out CSI compression described in base station feedback and need to be in a plurality of descending carriers of current sub-frame of uplink feedback CSI before CSI corresponding to descending carrier except the described descending carrier that need to carry out CSI compression, the method further comprises:

If described, need to carry out the CSI after compression that the descending carrier of CSI compression is corresponding, and need to be in a plurality of descending carriers of current sub-frame of uplink feedback CSI total CSI bit number of CSI corresponding to descending carrier except the described descending carrier that need to carry out CSI compression, surpass CSI transmission upper limit bit, described terminal is according to the priority of the priority of each descending carrier in described a plurality of descending carriers and/or the CSI reporting types of each descending carrier, the CSI that need to feed back part descending carrier in a plurality of descending carriers of CSI in current subframe gives up, make the bit number of remaining CSI be no more than described CSI transmission upper limit bit,

Described terminal, comprising to CSI described in base station feedback at current sub-frame of uplink:

Described terminal at current sub-frame of uplink, to base station feedback, carry out CSI give up after remaining CSI.

12. as the method as described in arbitrary in claim 1-10, it is characterized in that, terminal by Physical Uplink Control Channel PUCCH or Physical Uplink Shared Channel PUSCH to base station feedback CSI.

13. as the method as described in arbitrary in claim 1-10, it is characterized in that, described CSI information comprises:

A kind of or combination in any in channel quality indicator CQI information, pre-coding matrix indication PMI information, order indication RI information, precoding type indication PTI information.

14. 1 kinds of channel condition information CSI method of reseptances, is characterized in that, the method comprises:

The CSI number of bits of feedback after the compression of determining that the descending carrier that need to carry out CSI compression of described terminal is corresponding in the CSI number of bits of feedback base station after the compression that the described descending carrier that need to carry out CSI compression is corresponding is determined in base station, with described terminal need to be in a plurality of descending carriers of current sub-frame of uplink feedback CSI CSI number of bits of feedback sum corresponding to descending carrier except the described descending carrier that need to carry out CSI compression, for described terminal is in the CSI of current sub-frame of uplink actual feedback number of bits of feedback, and according to the CSI number of bits of feedback of described actual feedback, CSI to described terminal in current sub-frame of uplink feedback decodes,

Wherein, the descending carrier that need to need to carry out CSI compression in a plurality of descending carriers of current sub-frame of uplink feedback CSI of described terminal is determined in described base station, comprise: described base station according to described terminal need to be in a plurality of descending carriers of current sub-frame of uplink feedback CSI the CSI reporting types of each descending carrier, determine the descending carrier that need to carry out CSI compression; Or, what described terminal was determined in described base station need to belong to the descending carrier in the descending carrier set that system is pre-defined or high-level signaling is pre-configured in a plurality of descending carriers of current sub-frame of uplink feedback CSI, for carrying out the descending carrier of CSI compression; Or, described base station according to described terminal need to be in a plurality of descending carriers of current sub-frame of uplink feedback CSI the priority of each descending carrier and/or the priority of CSI reporting types, determine the descending carrier that need to carry out CSI compression.

15. methods as claimed in claim 14, it is characterized in that, described base station according to described terminal need to be in a plurality of descending carriers of current sub-frame of uplink feedback CSI the CSI reporting types of each descending carrier, determine the descending carrier that need to carry out CSI compression, comprising:

Whether what described base station judged described terminal need to surpass bit number threshold value by CSI bit number corresponding to the CSI reporting types of each descending carrier in a plurality of descending carriers of current sub-frame of uplink feedback CSI, if, determine the descending carrier of corresponding descending carrier for carrying out CSI compression, otherwise, determine the descending carrier of corresponding descending carrier for not needing to carry out CSI compression.

16. methods as claimed in claim 15, is characterized in that, described bit number threshold value is 4 or 5.

17. methods as claimed in claim 14, is characterized in that, the method for the CSI number of bits of feedback after the compression that the described descending carrier that need to carry out CSI compression is corresponding is determined in described base station, comprising:

Method one: when described CSI reporting types corresponding to descending carrier that need to carry out CSI compression comprises pre-coding matrix indication PMI information, described base station determines that described terminal gives up the PMI information in CSI reporting types corresponding to this descending carrier, the CSI number of bits of feedback using the number of bits of feedback of remaining CSI after compression; Or,

Method two: when described CSI reporting types corresponding to descending carrier that need to carry out CSI compression comprises channel quality indicator CQI information, described base station determines that described terminal gives up the CQI information in CSI reporting types corresponding to this descending carrier, the CSI number of bits of feedback using the number of bits of feedback of remaining CSI after compression.

18. methods as claimed in claim 17, it is characterized in that, during CSI number of bits of feedback after described base station employing method one is determined the compression that the described descending carrier that need to carry out CSI compression is corresponding, described base station is determined the CSI number of bits of feedback after many code words CQI compression corresponding to the described descending carrier of many codeword transmission, being comprised:

The CSI number of bits of feedback of the number of bits of feedback of the CQI of a code word after as compression in described base station selected many code words, and judge that described terminal gives up the CQI of all the other code words; Or,

The CSI number of bits of feedback of the number of bits of feedback of the CQI of a code word after as compression in described base station selected many code words, and according to the CQI of definite all the other code words of predefined skew OFFSET value; Or,

The CQI of a code word in described base station selected many code words, and determine and in the CSI report of described descending carrier, to comprise the indication information that is used to indicate the code word that the CQI of selection is corresponding, CSI number of bits of feedback using the bit number sum of the number of bits of feedback of the CQI of described selection code word and described indication information after compression, and judge that described terminal gives up the CQI of all the other code words; Or,

The CQI of a code word in described base station selected many code words, and determine in the CSI report of described descending carrier and comprise and be used to indicate the CQI of all the other code words with respect to the 1 or 2 bit space difference value information of the CQI of described selection code word, the CSI number of bits of feedback of the bit number sum of dividing value information using the number of bits of feedback of the CQI of described selection code word and described space parallax after compression; Or,

The number of bits of feedback that the average of the CQI of each code word in many code words is corresponding is determined in described base station, as the CSI number of bits of feedback after compression.

19. methods as claimed in claim 18, it is characterized in that, described base station basis is made an appointment or according to notify the configuration information to described terminal by high-level signaling, determines and select the CQI of which code word in many code words to determine the CSI number of bits of feedback after compression with described terminal; Or,

Described base station, is determined and is selected the CQI of which code word in many code words to determine the CSI number of bits of feedback after compression with respect to the skew OFFSET value that reports the CQI of code word according to the predefined CQI for definite code word of giving up.

20. methods as claimed in claim 17, it is characterized in that, during CSI number of bits of feedback after described base station employing method one is determined the compression that the described descending carrier that need to carry out CSI compression is corresponding, if the CSI after compression comprises CQI, described base station determines that this CQI calculates according to fixing PMI.

21. methods as claimed in claim 20, it is characterized in that, described fixing PMI is that described base station is by a pre-configured PMI of high-level signaling, or be the PMI that described base station and described terminal are made an appointment, or be the described PMI corresponding to descending carrier that need to carry out CSI compression reporting described terminal the last time.

22. methods as claimed in claim 17, is characterized in that, before the CSI number of bits of feedback after the compression that the described descending carrier that need to carry out CSI compression is corresponding is determined in described base station, further comprise:

A kind of method is chosen in described base station from described two kinds of methods, by high-level signaling, sends to described terminal;

Described base station determines that the CSI number of bits of feedback after the compression that the described descending carrier that need to carry out CSI compression is corresponding comprises:

Described base station adopts the method for choosing, and determines the CSI number of bits of feedback after the compression that the described descending carrier that need to carry out CSI compression is corresponding.

23. methods as claimed in claim 14, is characterized in that, the CSI number of bits of feedback after the compression that the described descending carrier that need to carry out CSI compression is corresponding is determined in described base station, further comprises:

Described base station judges that the CSI of the descending carrier that described terminal comprises subband CQI by CSI reporting types corresponding in described a plurality of descending carriers gives up, and according to the descending carrier of removing in described a plurality of descending carriers beyond the descending carrier that described CSI reporting types comprises subband CQI, determines the CSI number of bits of feedback after compression.

24. as the method as described in arbitrary in claim 14-23, it is characterized in that, in described base station, according to the CSI number of bits of feedback of described actual feedback, described terminal, before the CSI of current sub-frame of uplink feedback decodes, is further comprised:

If the CSI number of bits of feedback after compression corresponding to the descending carrier that need to carry out CSI compression of described terminal, and described terminal need to be in a plurality of descending carriers of current sub-frame of uplink feedback CSI CSI number of bits of feedback sum corresponding to descending carrier except the described descending carrier that need to carry out CSI compression, surpass CSI transmission upper limit bit, described base station is according to the priority of each descending carrier in described a plurality of descending carriers and/or the priority of CSI reporting types, judge that described terminal gives up the CSI of the part descending carrier in described a plurality of descending carriers, make the total bit number of CSI of remaining descending carrier be no more than described CSI transmission upper limit bit, and by the total number of bits of feedback of the CSI of remaining descending carrier, redefine as described terminal is in the CSI of current sub-frame of uplink actual feedback number of bits of feedback,

Decode and comprise at the CSI of current sub-frame of uplink feedback described terminal in described base station;

Described base station is according to the described terminal redefining in the CSI of current sub-frame of uplink actual feedback number of bits of feedback, and the CSI to described terminal in current sub-frame of uplink feedback decodes.

25. as the method as described in arbitrary in claim 14-23, it is characterized in that, described base station receives the CSI of described terminal feedback by Physical Uplink Control Channel PUCCH or Physical Uplink Shared Channel PUSCH.

26. as the method as described in arbitrary in claim 14-23, it is characterized in that, described CSI information comprises:

27. 1 kinds of terminals, is characterized in that, this terminal comprises:

Compression module; for the described CSI that need to carry out the descending carrier of CSI compression is carried out to compressed feedback module, for current sub-frame of uplink to the CSI after compression corresponding to the descending carrier that needs to carry out CSI compression described in base station feedback and need to be at a plurality of descending carriers of current sub-frame of uplink feedback CSI CSI corresponding to descending carrier except the described descending carrier that need to carry out CSI compression;

Wherein, described determination module, specifically for the CSI reporting types of each descending carrier in a plurality of descending carriers of current sub-frame of uplink feedback CSI as required, is determined the descending carrier that need to carry out CSI compression; Or, determine and need in a plurality of descending carriers of current sub-frame of uplink feedback CSI, belong to the descending carrier in the descending carrier set that system is pre-defined or high-level signaling is pre-configured, for carrying out the descending carrier of CSI compression; Or the priority of each descending carrier and/or the priority of CSI reporting types in a plurality of descending carriers of current sub-frame of uplink feedback CSI, determine the descending carrier that need to carry out CSI compression as required.

28. terminals as claimed in claim 27, is characterized in that, described determination module is used for:

29. terminals as claimed in claim 28, is characterized in that, described bit number threshold value is 4 or 5.

30. terminals as claimed in claim 27, is characterized in that, described compression module is used for:

As follows one or method two the described CSI that need to carry out the descending carrier of CSI compression is compressed:

31. terminals as claimed in claim 30, is characterized in that, described compression module also for:

When a pair of described CSI that need to carry out the descending carrier of CSI compression of employing method compresses, the many code word CQI corresponding to the described descending carrier of many codeword transmission compresses, and comprising:

32. terminals as claimed in claim 31, is characterized in that, described compression module is used for:

33. terminals as claimed in claim 30, is characterized in that, described compression module also for:

34. terminals as claimed in claim 33, it is characterized in that, described fixing PMI is that a pre-configured PMI of high-level signaling is passed through in base station, or a PMI who makes an appointment for terminal and base station, or the described PMI corresponding to descending carrier that need to carry out CSI compression reporting for terminal the last time.

35. terminals as claimed in claim 30, is characterized in that, described compression module also for:

36. terminals as claimed in claim 27, is characterized in that, described compression module also for:

37. as the terminal as described in arbitrary in claim 27-36, it is characterized in that, this terminal also comprises:

Give up module, for the CSI after compression corresponding to the described descending carrier that need to carry out CSI compression, and need to be in a plurality of descending carriers of current sub-frame of uplink feedback CSI total CSI bit number of CSI corresponding to descending carrier except the described descending carrier that need to carry out CSI compression, while surpassing CSI transmission upper limit bit, according to the priority of the priority of each descending carrier in described a plurality of descending carriers and/or the CSI reporting types of each descending carrier, the CSI that need to feed back part descending carrier in a plurality of descending carriers of CSI in current subframe gives up, make the bit number of remaining CSI be no more than described CSI transmission upper limit bit,

Described feedback module is used for:

At current sub-frame of uplink, to base station feedback, carry out CSI give up after remaining CSI.

38. as the terminal as described in arbitrary in claim 27-36, it is characterized in that, described feedback module is used for:

By Physical Uplink Control Channel PUCCH or Physical Uplink Shared Channel PUSCH to base station feedback CSI.

39. as the terminal as described in arbitrary in claim 27-36, it is characterized in that, described CSI information comprises:

40. 1 kinds of base stations, is characterized in that, this base station comprises:

Receiver module, for determining CSI number of bits of feedback after the compression that the descending carrier that need to carry out CSI compression of described terminal is corresponding, the CSI number of bits of feedback sum corresponding with a plurality of descending carriers that need to feed back CSI at current sub-frame of uplink of described terminal descending carrier except the described descending carrier that need to carry out CSI compression, for described terminal is in the CSI of current sub-frame of uplink actual feedback number of bits of feedback, and according to the CSI number of bits of feedback of described actual feedback, the CSI to described terminal in current sub-frame of uplink feedback decodes;

Wherein, described carrier wave determination module is used for: according to described terminal, need to, in the CSI reporting types of a plurality of each descending carriers of descending carrier of current sub-frame of uplink feedback CSI, determine the descending carrier that need to carry out CSI compression of described terminal; Or, that determines described terminal need to belong to the descending carrier in the descending carrier set that system is pre-defined or high-level signaling is pre-configured in a plurality of descending carriers of current sub-frame of uplink feedback CSI, is the descending carrier that need to carry out CSI compression of described terminal; Or, according to described terminal need to be in a plurality of descending carriers of current sub-frame of uplink feedback CSI the priority of each descending carrier and/or the priority of CSI reporting types, determine the descending carrier that need to carry out CSI compression of described terminal.

41. base stations as claimed in claim 40, is characterized in that, described carrier wave determination module is used for:

42. base stations as claimed in claim 41, is characterized in that, described bit number threshold value is 4 or 5.

43. base stations as claimed in claim 40, is characterized in that, described bit number determination module is used for:

As follows one or method two determine the CSI number of bits of feedback after the compression that the described descending carrier that need to carry out CSI compression is corresponding:

44. base stations as claimed in claim 43, is characterized in that, described bit number determination module also for:

During CSI number of bits of feedback after employing method one is determined the compression that the described descending carrier that need to carry out CSI compression is corresponding, determine the CSI number of bits of feedback after many code words CQI compression corresponding to the described descending carrier of many codeword transmission, comprising:

45. base stations as claimed in claim 44, is characterized in that, described bit number determination module is used for:

46. base stations as claimed in claim 43, is characterized in that, described bit number determination module is used for:

47. base stations as claimed in claim 46, it is characterized in that, described fixing PMI is that described base station is by a pre-configured PMI of high-level signaling, or be the PMI that described base station and described terminal are made an appointment, or be the described PMI corresponding to descending carrier that need to carry out CSI compression reporting described terminal the last time.

48. base stations as claimed in claim 43, is characterized in that, described bit number determination module also for:

49. base stations as claimed in claim 40, is characterized in that, described bit number determination module also for:

50. as the base station as described in arbitrary in claim 40-49, it is characterized in that, this base station also comprises:

Give up module, for the CSI number of bits of feedback after compression corresponding to the descending carrier that need to carry out CSI compression of described terminal, and described terminal need to be in a plurality of descending carriers of current sub-frame of uplink feedback CSI CSI number of bits of feedback sum corresponding to descending carrier except the described descending carrier that need to carry out CSI compression, while surpassing CSI transmission upper limit bit, according to the priority of each descending carrier in described a plurality of descending carriers and/or the priority of CSI reporting types, judge that described terminal gives up the CSI of the part descending carrier in described a plurality of descending carriers, make the total bit number of CSI of remaining descending carrier be no more than described CSI transmission upper limit bit, and by the total number of bits of feedback of the CSI of remaining descending carrier, redefine as described terminal is in the CSI of current sub-frame of uplink actual feedback number of bits of feedback,

Described receiver module is used for: described basis is given up described terminal that module redefines in the CSI of current sub-frame of uplink actual feedback number of bits of feedback, and the CSI to described terminal in current sub-frame of uplink feedback decodes.

51. as the base station as described in arbitrary in claim 40-49, it is characterized in that, described receiver module is used for: the CSI that receives described terminal feedback by Physical Uplink Control Channel PUCCH or Physical Uplink Shared Channel PUSCH.

52. as the base station as described in arbitrary in claim 40-49, it is characterized in that, described CSI information comprises: