CN106712895B

CN106712895B - A kind of method and device of method that feeding back CSI and transmission downlink data

Info

Publication number: CN106712895B
Application number: CN201510463459.XA
Authority: CN
Inventors: 陈文洪; 高秋彬; 陈润华; 拉盖施; 李辉
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2015-07-31
Filing date: 2015-07-31
Publication date: 2019-08-16
Anticipated expiration: 2035-07-31
Also published as: CN106712895A

Abstract

The present invention provides the method and device of a kind of method for feeding back CSI and transmission downlink data, the method of UE feedback CSI includes: that at least one CSI feedback configuration group of base station configuration is determined according to the instruction of base station, and each CSI feedback configuration group includes the configuration of at least one CSI feedback；For any CSI feedback configuration group of base station configuration, determination need to carry out N number of CSI feedback configuration of CSI feedback, based on determining N number of CSI feedback configuration and corresponding CSI, determine that the CSI feedback recommended configures number K；The location information of N number of CSI feedback configuration and its corresponding CSI and CSI feedback configuration number K are reported to base station.Base station of the present invention can obtain flexible dispatching of the corresponding CSI of multiple downlink wave beams for downlink, while can also know the downlink wave beam quantity being wherein recommended to use obtained from the measurement of the side UE to provide reference for descending scheduling.

Description

A kind of method and device of method that feeding back CSI and transmission downlink data

Technical field

The present invention relates to wireless communication technology field more particularly to a kind of methods and biography of feeding back channel state information CSI The method and device of defeated downlink data.

Background technique

In existing cellular system, base-station antenna array is generally in horizontally arranged, as depicted in figs. 1 and 2.Transmission end of base station Wave beam is only capable of being adjusted in the horizontal direction, and is in vertical direction fixed angle of declination, therefore various wave beam formings/prelist Code technology etc. is all based on the progress of horizontal direction channel information.In fact, since wireless signal is three-dimensional propagation in space , the method for fixed angle of declination cannot be such that the performance of system is optimal.The wave beam adjustment of vertical direction is for reducing minizone Interference, improving system performance has critically important meaning.

With the development of antenna technology, industry has occurred can be to the active antenna of each antenna element independent control, such as Shown in Fig. 3 a and Fig. 3 b.Using this aerial array, such that wave beam is adjusted in the dynamic of vertical direction.

Under this three-dimensional antenna array, the signal that base station is sent to UE (User Equipment, user equipment) is not only Figuration can be carried out in the horizontal direction, can also carry out figuration in vertical direction.In order to make eNB (Evolved NodeB, evolution Base station) determine that the figuration vector of vertical direction enables the wave beam of vertical direction to be directed at UE, so that maximum figuration gain is obtained, It usually requires to configure multiple CSI (Channel State Information, channel state information) feedback configurations to UE, it is different CSI feedback configuration use different vertical beam figuration vectors, UE be based on multiple CSI feedbacks configuration carry out downlink signal measurement Afterwards, by optimal CSI and its corresponding CSI feedback configuration notification base station, to enable base station that can adopt when sending signal to UE Vertical figuration is carried out with optimal vertical figuration vector.Here CSI generally comprise RI (Rank Indication, order instruction), PMI (Precoding Matrix Indicator, pre-coding matrix instruction), CQI (Channel Quality Indication, channel quality instruction).

Specific steps are described below:

Firstly, base station determines N number of NZP (non-zero power) CSI-RS (Channel State Information Reference Signal, channel state information measuring reference signals) resource, the port number and antenna of each CSI-RS resource Single number of tuples is identical, and the corresponding one group of antenna element in each port of each CSI-RS resource, such as a port corresponding the One column vertical antenna, second port correspond to secondary series vertical antenna, and so on.Base station is that each CSI-RS resource determines one A beamforming weighting vector, beamforming weighting vector can the vertical angle that covered by the CSI-RS resource determine.It is right In each port of the CSI-RS resource, pilot signal is after wave beam forming vector weighting from the corresponding one group of day in the port It is issued on line unit.

By taking Fig. 4 as an example, 16 antenna elements are shared, 4 antenna elements in vertical direction are divided into one group, every group of 4 days Line unit shares 4 groups.Each group of antenna element is used to send the pilot signal of a port of CSI-RS resource.I-th of port Pilot signal s_n(i) beamforming weighting vector [w is used_n(0) w_n(1) w_n(2) w_n(3)]^TFrom i-th group of antenna after weighting, i.e., It is issued on i-th array antenna.Subscript n in figure is for distinguishing CSI-RS resource.If base station is configured with 3 CSI-RS resource, each The beam direction of CSI-RS resource is different, then needs 3 groups of different beamforming weighting vector [w of configuration_n(0) w_n(1) w_n(2) w_n(3)]^T, n=0,1,2.UE can be measured respectively based on this three groups of CSI-RS resource, report wherein channel quality it is best The location information of the CSI measured in CSI-RS resource and the CSI-RS resource in the CSI-RS resource of all configurations. Base station can obtain current optimal vertical orming weighting vector according to the location information, to carry out the vertical figuration of data.

In order to support CoMP in LTE (Long Term Evolution, long term evolution) system, CSI process is introduced Concept.Each CSI process can correspond to a NZP CSI-RS resource configuration and an IMR (interference Measurement resource, interferometry resource) configuration, NZP CSI-RS progress channel measurement of the UE based on configuration, and Interference measurement is carried out with corresponding IMR, to obtain and feed back each corresponding CSI of CSI process.

In existing feedback mechanism, if UE only feeds back the location information and corresponding CSI of optimal CSI feedback configuration, The information that then base station side can only be fed back based on UE carries out downlink transfer.If base station wishes to use more according to the dispatch situation of itself More vertical dimension wave beams is used for downlink transfer, then can not obtain more CSI feedbacks and configure corresponding CSI, therefore dispatch flexible Property is poor.

Summary of the invention

The present invention provides the method for feeding back channel state information CSI a kind of and the method and device of transmission downlink data, base The flexible dispatching that the corresponding CSI of multiple downlink wave beams is used for downlink can both be obtained by standing, while can also be known from the side UE and be measured To the downlink wave beam quantity being wherein recommended to use to for descending scheduling provide reference.

The present invention provides the method for user equipment (UE) feeding back channel state information CSI a kind of, comprising:

At least one CSI feedback configuration group of base station configuration, each CSI feedback configuration group packet are determined according to the instruction of base station The configuration of at least one CSI feedback is included, the CSI feedback is configured for downlink CSI measurement and the downlink signal configuration of feedback；

For any CSI feedback configuration group of base station configuration, determination need to carry out N number of CSI feedback configuration of CSI feedback, base In determining N number of CSI feedback configuration and corresponding CSI, determine that the CSI feedback recommended configures number K, N is anti-no more than the CSI The CSI feedback configuration sum that feedback configuration group includes, K is the positive integer no more than N；

The location information of determining N number of CSI feedback configuration and its corresponding CSI and the CSI feedback are configured into number K is reported to base station.

Preferably, the CSI feedback is configured to CSI process, or is non-zero power channel state information reference signals NPZ CSI-RS configuration, or configured for interferometry resource IMR.

Preferably, the value of N is determined using following either type:

According to the agreement with base station, the value of N is determined；

The high-level signaling sent by base station, determines the value of N；

By the triggering command for the aperiodicity CSI feedback that base station is sent, the value of N is determined.

Preferably, it when determining that N is 1, after determination need to carry out 1 CSI feedback configuration of CSI feedback, determines and recommends base station The CSI feedback configuration number K used is 1；

The location information of 1 CSI feedback configuration of the determination and its corresponding CSI are reported to base station, do not report CSI Feedback configuration number K；Or

The location information of 1 CSI feedback configuration of the determination and its corresponding CSI are reported to base station, reported simultaneously CSI feedback configuration number K is fixed as 1.

Preferably, from each CSI feedback configuration group that base station configures, determination need to carry out N number of CSI feedback of CSI feedback Configuration, specifically includes:

Reference Signal Received Power RSRP measurement is carried out to each CSI feedback configuration in CSI feedback configuration group, according to The sequence of RSRP from high to low selects the corresponding CSI feedback configuration of N number of RSRP as the N number of CSI feedback that need to carry out CSI feedback Configuration；Or

Channel quality indicator (CQI) measurement is carried out to each CSI feedback configuration in CSI feedback configuration group, according to CQI from height To low sequence, the corresponding CSI feedback configuration of N number of CQI is selected to configure as the N number of CSI feedback that need to carry out CSI feedback；Or

Channel state information CSI measurement is carried out to each CSI feedback configuration in CSI feedback configuration group, and is surveyed according to CSI Amount result obtains corresponding transport block size TBsize, according to the sequence of TBsize from big to small, selects N number of TBsize corresponding CSI feedback configuration is configured as the N number of CSI feedback that need to carry out CSI feedback.

Preferably, when N is greater than 1, further includes:

The relative phase information between N number of CSI feedback configuration is reported to base station.

Preferably, Xiang Jizhan reports the relative phase information between N number of CSI feedback configuration, specifically includes:

Relative phase information between N number of CSI feedback configuration is reported to base station as independent feedback quantity；Or

After the relative phase information and CSI feedback configuration number K combined coding between N number of CSI feedback configuration It is reported to base station；Or

By the relative phase information between N number of CSI feedback configuration, combine with the location information of N number of CSI feedback configuration Base station is reported to after coding.

Preferably, the location information by N number of CSI feedback configuration is reported to base station, specifically includes:

Index of the N number of CSI feedback configuration where it in CSI feedback configuration group is reported to base station；Or

One CSI feedback configuration group corresponds to a position sequence, each CSI feedback configuration in the CSI feedback configuration group A bit in the corresponding position sequence, by N number of CSI feedback configure the bit in corresponding position sequence be set to After the different value of other bits, the corresponding position sequence of feedback configuration group at place is reported to base station.

It is preferably based on determining N number of CSI feedback configuration and corresponding CSI, determines that the CSI feedback recommended configures number K is specifically included:

Based on determining N number of CSI feedback configuration and corresponding CSI, determining keeps down channel capacity maximum or downlink The maximum CSI feedback configuration number of transport block size TBsize is the CSI feedback configuration number K recommended.

Determine that all possible CSI feedback no more than N configures number i；

Number i is configured for each CSI feedback, it is assumed that base station selects i optimal CSI anti-from the configuration of N number of CSI feedback Feedback configures corresponding CSI and carries out the transport block size of corresponding down channel capacity or downlink when downlink data transmission TBsize；

It determines and obtains the CSI feedback configuration number of the transport block size TBsize of maximum downstream channel capacity or maximum downstream I is the CSI feedback configuration number K recommended.

Preferably, CSI feedback configuration number K is reported to base station, specifically included:

Base station is reported to using CSI feedback configuration number K as independent feedback quantity；Or

CSI feedback is configured into number K, is reported to base station after the location information combined coding configured with N number of CSI feedback.

The present invention also provides a kind of methods of base station transmission downlink data characterized by comprising

At least one CSI back configuration group is configured for user equipment (UE) and is indicated to UE, and each CSI is anti- Feedback configuration group includes the configuration of at least one CSI feedback, and the CSI feedback is configured for the downlink of downlink CSI measurement and feedback Signal configuration；

Receive the location information of N number of CSI feedback configuration in each CSI feedback configuration group for reporting of UE and its corresponding The CSI feedback configuration number K that CSI and UE recommends base station to use；

According to the location information of the UE N number of CSI feedback configuration reported and its corresponding CSI and CSI feedback configuration number K, really Determine the downlink data transmission number of plies and precoding is carried out to the downlink data of each transport layer, line link of going forward side by side adaptively is sent afterwards.

The present invention also provides a kind of user equipment (UE)s, comprising:

The present invention also provides a kind of user equipment (UE)s characterized by comprising

Determination unit is configured, at least one CSI feedback configuration group of base station configuration is determined for the instruction according to base station, often A CSI feedback configuration group includes the configuration of at least one CSI feedback, and the CSI feedback is configured for downlink CSI measurement and feedback Downlink signal configuration；

Feedback determination unit, in any CSI feedback configuration group of base station configuration, determination need to carry out the N number of of CSI feedback CSI feedback configuration determines that the CSI feedback recommended configures number K based on determining N number of CSI feedback configuration and corresponding CSI, N is not more than the CSI feedback configuration group, and K is the positive integer no more than N；

Reporting unit, for by the location information of the N number of CSI feedback configuration determined and its corresponding CSI and described CSI feedback configuration number K is reported to base station.

Preferably, the feedback determination unit determines the value of N using following either type:

According to the agreement with base station, the value of N is determined；

The high-level signaling sent by base station, determines the value of N；

Preferably, when the feedback determination unit determines that N is 1,1 CSI feedback that determination need to carry out CSI feedback configures it Afterwards, determine that the CSI feedback configuration number K recommended is 1；

The location information that 1 CSI feedback of the determination configures and its corresponding CSI are reported to base by the reporting unit It stands, CSI feedback is not reported to configure number K；Or the location information and its corresponding CSI for configuring 1 CSI feedback of the determination It is reported to base station, while CSI feedback configuration number K being reported to be fixed as 1.

Preferably, the feedback determines determination unit from each CSI feedback configuration group that base station configures, and determination needs to carry out N number of CSI feedback of CSI feedback configures, and specifically includes:

Preferably, in feedback determination unit when N is greater than 1, the reporting unit is also used to:

Preferably, the reporting unit reports the relative phase information between N number of CSI feedback configuration, tool to base station Body includes:

Preferably, the feedback determination unit determines recommendation based on determining N number of CSI feedback configuration and corresponding CSI CSI feedback configures number K, specifically includes:

Based on determining N number of CSI feedback configuration and corresponding CSI, determination makes down channel capacity maximum downstream The maximum CSI feedback configuration number of transport block size TBsize is the CSI feedback configuration number K recommended.

Preferably, the feedback determination unit is configured and is corresponded to CSI based on determining N number of CSI feedback, determines recommendation CSI feedback configures number K, specifically includes:

Determine that all possible CSI feedback no more than N configures number i；

Number i is configured for each CSI feedback, it is assumed that base station selects i a optimal from N number of CSI feedback configuration The transport block size of CSI feedback corresponding down channel capacity downlink when configuring corresponding CSI for downlink data transmission TBsize；

Preferably, CSI feedback configuration number K is reported to base station by the reporting unit, is specifically included:

The present invention also provides a kind of base stations, comprising:

Configuration unit, for configuring at least one CSI back configuration group for user equipment (UE) and indicating To UE, each CSI feedback configuration group includes the configuration of at least one CSI feedback, and the CSI feedback is configured for downlink CSI survey The configuration of the downlink signal of amount and feedback；

Feedback information receiving unit, for receiving the configuration of N number of CSI feedback in each CSI feedback configuration group that UE is reported Location information and its CSI feedback recommended of corresponding CSI and UE configure number K；

Transmission unit, the location information and its corresponding CSI and CSI of N number of CSI feedback configuration for being reported according to UE Feedback configuration number K determines the downlink data transmission number of plies and carries out precoding to the downlink data of each transport layer, and line link of going forward side by side is certainly It is sent after adaptation.

Using feeding back channel state information CSI provided by the invention method and transmission downlink data method and device, It has following technical effect that

Base station can both obtain the corresponding CSI of multiple downlink wave beams for downlink flexible dispatching, while can also know from The downlink wave beam quantity that the measurement of the side UE obtained be wherein recommended to use is to provide reference for descending scheduling.

Detailed description of the invention

Fig. 1 is horizontally arranged dual polarized antenna schematic diagram in the prior art；

Fig. 2 is horizontally arranged array antenna schematic diagram in the prior art；

Fig. 3 a is the dual polarized antenna schematic diagram of horizontal and vertical two-dimensional arrangements in the prior art；

Fig. 3 b is the array antenna schematic diagram of horizontal and vertical two-dimensional arrangements in the prior art；

Fig. 4 is to send CSI-RS schematic diagram using multiple CSI-RS antenna ports in the prior art；

Fig. 5 is that UE provided in an embodiment of the present invention feeds back CSI method flow diagram；

Fig. 6 is the method flow diagram that downlink data is transmitted in base station provided in an embodiment of the present invention；

Fig. 7 is UE structural schematic diagram provided in an embodiment of the present invention；

Fig. 8 be another embodiment of the present invention provides UE structure chart；

Fig. 9 is architecture of base station schematic diagram provided in an embodiment of the present invention；

Figure 10 be another embodiment of the present invention provides base station structure diagram.

Specific embodiment

With reference to the accompanying drawings and examples to the method for feeding back channel state information CSI provided by the invention and transmission downlink The method and device of data is described in more detail.

The present invention provides the method for user equipment (UE) feeding back channel state information CSI a kind of, as shown in Figure 5, comprising:

Step 501, at least one CSI feedback configuration group of base station configuration, each CSI feedback are determined according to the instruction of base station Configuration group includes the configuration of at least one CSI feedback, and the CSI feedback is configured for the downlink letter of downlink CSI measurement and feedback Number configuration；

Base station can configure one or more CSI feedback configuration group, and each CSI feedback configuration group includes one or more CSI feedback configuration.

It specifically, CSI feedback is configured to CSI process, or is non-zero power channel state information reference signals NPZ CSI- RS configuration, or configured for interferometry resource IMR.Therefore, CSI feedback configuration group may include appointing for the above CSI feedback configuration Meaning combination, for example, CSI feedback configuration group may include multiple NZP CSI-RS configurations and an IMR configuration.

One CSI process corresponds at least one NZP CSI-RS configuration and an interferometry resource IMR.

Certainly, a CSI feedback configuration is also possible to other downlink reference signals for measuring and feeding back for downlink CSI And/or downlink measures resource distribution.

One CSI feedback configuration is configured comprising at least one NZP CSI-RS, it is preferable that institute in different CSI feedback configurations The NZP CSI-RS of configuration carries out wave beam forming using different figuration vectors.

When one CSI feedback configuration group includes the configuration of multiple CSI feedbacks, which can also include described Multiple CSI common relevant configuration information.

Concrete example:

Citing 1, base station configure a CSI feedback configuration group, the CSI feedback configuration group may include multiple CSI processes or The multiple NZP CSI-RS of person.One CSI feedback configuration group can also include multiple CSI other than comprising the configuration of multiple CSI feedbacks The common other configurations information of feedback configuration.For example, may include multiple NZP CSI-RS configurations and all NZP CSI-RS The common associated IMR configuration of configuration

Citing 2, base station can configure three CSI feedback configuration groups, and each CSI feedback configuration group includes four NZP CSI- RS configuration can also include their common associated IMR configurations.

Base station can send high-level signaling to UE, and the high-level signaling that UE is sent according to base station determines base station configuration at least One CSI feedback configuration group.

Step 502, for any CSI feedback configuration group of base station configuration, determination need to carry out N number of CSI feedback of CSI feedback Configuration determines that the CSI feedback recommended configures number K, N is not more than based on determining N number of CSI feedback configuration and corresponding CSI The CSI feedback that the CSI feedback configuration group includes configures sum, and K is the positive integer no more than N；

UE can determine the value of N using following either type:

I, N are the fixed numbers that base station and terminal are appointed, such as N=2, thus UE can according to the agreement with base station, Determine the value of N；

Ii, N are the numerical value that base station is configured by high-level signaling, for example N is a value in { 1,2,3,4 }, and therefore, UE can With the high-level signaling sent by base station, the value of N is determined；

Iii, for aperiodic CSI feedback, N can also be that signaling instruction is triggered by aperiodicity CSI feedback in base station Value；For example, triggering signaling by the aperiodicity CSI feedback of 1 bit indicates that N is 1 or 2, therefore can be sent by base station Aperiodicity CSI feedback triggering command, determine the value of N, determine the value of N.

The CSI feedback configuration number that UE recommends is K, and it is best in N number of CSI feedback configuration of UE feedback to indicate that recommendation base station uses K CSI feedback configure corresponding CSI and be used for downlink transfer.

Preferably, the location information and corresponding CSI of N number of CSI feedback configuration are in the priority according to recommendation Base station is offered, what UE reported K representative at this time is K CSI feedback configuration before being recommended to use.Therefore, K best CSI feedback It configures the preceding K CSI feedback that corresponding CSI is UE feedback and configures corresponding CSI.

Step 503, the location information and its corresponding CSI and CSI N number of CSI feedback of the determination configured is anti- Feedback configuration number K is reported to base station.

The method of UE feedback CSI provided by the invention is preferably applied to frequency division multiple-input and multiple-output FDMIMO system.

In the embodiment of the present invention, UE is other than the location information and CSI for reporting the CSI feedback of certain amount N to configure, simultaneously The CSI feedback configured number for recommending base station to use also is reported, base station can both obtain the corresponding CSI of multiple downlink wave beams and use In the flexible dispatching of downlink, while the downlink wave beam quantity being wherein recommended to use obtained from the measurement of the side UE can also be known to be Descending scheduling provides reference.

The method of UE feedback CSI provided in an embodiment of the present invention, which is preferably applied to use downlink signal when downlink transfer, hangs down Straight dimension figuration is also possible to horizontal dimension figuration, can also be horizontal vertical two dimension figuration, as long as with certain in actual implementation Shape-endowing weight value to CSI-RS carry out figuration, on which antenna element carry out the port CSI-RS figuration be not limited, Method of the invention can be used.

Preferably, in step 501, UE can determine the CSI feedback configuration group of base station configuration in the following way:

1) index of the CSI feedback configuration for including in each CSI feedback configuration group sent according to base station, determines base station The CSI feedback configuration group of configuration；

2) configuration parameter of all CSI feedbacks configuration sent according to base station determines the CSI feedback configuration of base station configuration Group, wherein index and the CSI where CSI feedback configuration that the configuration parameter of each CSI feedback configuration includes CSI feedback configuration The group index of feedback configuration group.

For the first case, base station can be that UE configures feedback configuration group according to certain sequence, such as primary to send one The index that CSI feedback configures in CSI feedback configuration group, so that UE be allow to determine which CSI feedback configuration belongs to the same CSI Feedback configuration group.

Preferably, in step 502, from each CSI feedback configuration group that base station configures, determination need to carry out CSI feedback The configuration of N number of CSI feedback, specifically can be, but not limited to using following either type:

I carries out RSRP (Reference signal to each CSI feedback configuration in CSI feedback configuration group Received power, Reference Signal Received Power) measurement, according to the sequence of RSRP from high to low, select N number of RSRP corresponding CSI feedback configuration is configured as the N number of CSI feedback that need to carry out CSI feedback；

Ii carries out channel quality indicator (CQI) measurement to each CSI feedback configuration in CSI feedback configuration group, according to CQI Sequence from high to low selects the corresponding CSI feedback configuration of N number of CQI to configure as the N number of CSI feedback that need to carry out CSI feedback.

Iii, to each CSI feedback configuration progress channel state information CSI measurement in CSI feedback configuration group, and according to CSI measurement result obtains corresponding transport block size TBsize, according to the sequence of TBsize from big to small, selects N number of TBsize Corresponding CSI feedback configuration is configured as the N number of CSI feedback that need to carry out CSI feedback.

Preferably, in step 502, it based on determining N number of CSI feedback configuration and corresponding CSI, determines and base station is recommended to make CSI feedback configures number K, can be, but not limited in the following way:

Based on determining N number of CSI feedback configuration and corresponding CSI, determining keeps down channel capacity maximum or the transmission of downlink The maximum CSI feedback configuration number of block size TBsize is the CSI feedback configuration number K recommended.

For first way, it can specifically include following steps:

Determine that all possible CSI feedback no more than N configures number i；

Number i is configured for each CSI feedback, it is assumed that base station selects i optimal CSI anti-from the configuration of N number of CSI feedback Feedback configures corresponding CSI and is used for corresponding down channel capacity when downlink data transmission, specifically can be optimal according to selection i CSI feedback configures corresponding CSI and is used to correspond to each transport layer SINR when downlink data transmission, determines down channel capacity；

Determine that the CSI feedback configuration number i for obtaining maximum downstream channel capacity is the CSI feedback configuration number for recommending base station to use K。

Assuming that N=2, then UE needs to assume respectively that base station configures corresponding CSI for downlink using 1 and 2 CSI feedbacks Transmit obtained each layer SINR of downlink, and in the case of calculating two kinds each layer channel capacity summation, so that it is determined that total down channel The maximum CSI feedback of capacity configures number.

For the second way, it can specifically include following steps:

Determine that all possible CSI feedback no more than N configures number i；

Number i is configured for each CSI feedback, it is assumed that base station selects i optimal CSI anti-from the configuration of N number of CSI feedback Feedback configures the transport block size TBsize that corresponding CSI carries out corresponding downlink when downlink data transmission, specifically can be according to each The transport block size of transport layer obtains the transport block size of downlink；

Determine that the CSI feedback configuration number i for obtaining maximum transport block size TBsize is that the CSI feedback for recommending base station to use is matched Set several K.

Frequency division multiplexing Multiinputoutput FDMIMO transmission for wave beam forming Beamformed CSI-RS mode, if The transmission number of plies of UE is greater than 1, and base station side can be used for the transmission of different data layer in vertical dimension using one or more wave beam. At this point, UE needs to feed back the relevant information and CSI of multiple wave beams, with the descending scheduling for base station side.Due in the prior art Interfere with each other situation between the downlink SINR and different data layer that base station side can not know each wave beam, therefore, it is difficult to from In the multiple beam informations and CSI of UE feedback, optimal vertical dimension number of beams is determined.The method that the present invention provides, UE according to Down channel capacity is obtained according to each transport layer SINR, feedback obtains corresponding CSI feedback configuration when maximum downstream channel capacity Number K can be used for assistant base station side and determine accurate vertical dimension number of beams for downlink transfer.

Preferably, in step 503, UE passes through periodical reporting schemes, or uses aperiodicity triggering mode, will be described The location information and its corresponding CSI and CSI feedback configuration number K of determining N number of CSI feedback configuration are reported to base station.

Preferably, in step 503, CSI feedback configuration number K is reported to base station, can be, but not limited to using following any Mode:

1) base station is reported to using CSI feedback configuration number K as independent feedback quantity；

2) CSI feedback is configured into number K, is reported to base station after the location information combined coding configured with N number of CSI feedback.

Preferably, CSI feedback is configured into number K, the location information combined coding with the configuration of N number of CSI feedback specifically includes:

CSI feedback is configured into number K, the location information with the CSI feedback configuration in N number of CSI feedback configuration of agreement Combined coding；Or

CSI feedback is configured into number K, is distinguished with the location information of CSI feedback configuration in each of the configuration of N number of CSI feedback Combined coding.

Preferably, when determining that N is 1 in step 502, when determining that N is 1,1 CSI feedback that determination need to carry out CSI feedback is matched After setting, determine that the CSI feedback configuration number K for recommending base station to use is 1；Then in step 503,1 CSI of the determination is anti- The location information and its corresponding CSI for presenting configuration are reported to base station, while CSI feedback configuration number K being reported to be fixed as 1, certainly, CSI feedback can not be reported to configure number K.

Preferably, in step 503, the location information that determining N number of CSI feedback configures is reported to base station, can with but not It is limited to using following either type:

The index that N number of CSI feedback of the determination configures where it in CSI feedback configuration group is reported to base station by i； For example, CSI feedback configuration group includes K CSI feedback configuration, then the location information of CSI feedback configuration needs log2K ratio Spy, the directly index of the CSI feedback configuration of instruction UE selection.

Ii, by the way of bitmap, i.e. the corresponding position sequence of a CSI feedback configuration group, CSI feedback configuration Each CSI feedback in group configures a bit in the corresponding position sequence, configures by N number of CSI feedback of the determination After bit in corresponding position sequence is set to the value different from other bits, by the corresponding position-order of feedback configuration group at place Column are reported to base station.

For bitmap mode, if a CSI feedback configuration is selected by UE, corresponding position bit is set to 1, otherwise It is 0.For example, CSI feedback configuration group includes K CSI feedback configuration, then need length for the position sequence of K, i-th in sequence Bit is that i-th of CSI feedback configures corresponding location information in group, illustrates that the configuration is selected by UE if the bit is 1.

Preferably, when determining that N is greater than 1 in step 502, further includes:

Wherein, the step and step 503 may be performed simultaneously, i.e., report these information simultaneously, can also be performed separately, i.e., It separates and does not report simultaneously.

UE can be, but not limited to determine the relative phase information between N number of CSI feedback configuration in the following way:

Relative phase information is that selection is carried out in the phase code book appointed by UE from one, and UE can believe according to maximum The principles such as road capacity select relative phase information.Specifically, UE is using each code word in phase code book as N number of CSI feedback Relative phase weighted information between configuration calculates the corresponding downlink overall channel capacity of each code word；Determine that maximum downstream is always believed The corresponding code word of road capacity, for the relative phase information between the configuration of N number of CSI feedback.For example, phase code book can be { 1exp (j*k*pi/2) }, k=0, the relative phase information of 1,2,3, UE feedback are the index of the code word of selection.

UE can be, but not limited to using following either type, and Xiang Jizhan reports opposite between N number of CSI feedback configuration Phase information:

Relative phase information between the configuration of N number of CSI feedback is reported to base station as independent feedback quantity by i；

Ii, on after the relative phase information and CSI feedback configuration number K combined coding between the configuration of N number of CSI feedback Offer base station；

Iii combines the relative phase information between the configuration of N number of CSI feedback with the location information of N number of CSI feedback configuration Base station is reported to after coding.

For the third coding mode, can be by the relative phase information between the configuration of N number of CSI feedback, with N number of CSI The location information combined coding for the CSI feedback configuration arranged in feedback configuration；Alternatively, by between the configuration of N number of CSI feedback Relative phase information (i.e. can with the location information difference combined coding of CSI feedback configuration in each of the configuration of N number of CSI feedback It is transmitted several times).

In network side, the embodiment of the present invention also provides a kind of method of base station transmission downlink data, as shown in Figure 6, comprising:

Step 601, it configures at least one CSI back configuration group for user equipment (UE) and is indicated to UE, Each CSI feedback configuration group includes the configuration of at least one CSI feedback, and the CSI feedback is configured for downlink CSI measurement and anti- The downlink signal of feedback configures；

Base station can configure a CSI feedback configuration group when transmitting downlink data for each carrier wave, or all Carrier wave configures an identical CSI feedback configuration group.

Base station can will configure at least one CSI feedback configuration group for UE and be indicated to UE by sending high-level signaling to UE.

Step 602, receive N number of CSI feedback configuration in each CSI feedback configuration group for reporting of UE location information and its The CSI feedback configuration number K that corresponding CSI and UE recommends base station to use；

Step 603, the location information and its corresponding CSI and CSI feedback of the N number of CSI feedback configuration reported according to UE are matched Several K are set, determine the downlink data transmission number of plies and precoding is carried out to the downlink data of each transport layer, after line link of going forward side by side is adaptive It sends.

Flexible dispatching of the corresponding CSI of multiple downlink wave beams for downlink can be both obtained using this method base station, simultaneously The downlink wave beam quantity being wherein recommended to use obtained from the measurement of the side UE can also be known to provide reference for descending scheduling.

The CSI feedback configuration number of feedback can represent for K makes downlink capacity maximization or the maximized numbers of beams of transmission block Amount, therefore base station can be known with reference to the CSI feedback configured number of the recommendation and make the maximized number of beams of downlink capacity, thus CSI progress downlink transfer based on each wave beam that the number of beams and UE are fed back；Due to UE feedback CSI number of beams be greater than etc. In the number of beams that UE recommends, therefore base station can select more suitable wave number quantity to carry out downlink data biography according to dispatch situation It is defeated.

Preferably, in step 601, at least one CSI feedback configuration group will be configured for UE and be indicated to UE, specifically included:

The index that CSI feedback in each CSI feedback configuration group configured for UE configures is sent to UE；

Alternatively, the configuration parameter that all CSI feedbacks configure is sent to UE, wherein the configuration parameter of each CSI feedback configuration The group index of CSI feedback configuration group where index and CSI feedback configuration including CSI feedback configuration.

Preferably, CSI includes order instruction RI, and in step 603, base station can be, but not limited to determine downlink with the following method Data transfer layer number:

Corresponding CSI is configured according to N number of CSI feedback that UE is reported, it is anti-from N number of CSI according to CSI from good to bad sequence K CSI feedback configuration of selection in feedback configuration；

Determine that the downlink data transmission number of plies isRI_iIt is i-th in the K CSI feedback configuration of selection CSI feedback configures the RI in corresponding CSI.

Preferably, CSI includes order channel quality indicator (CQI) and pre-coding matrix instruction PMI, and in step 603, base station is to each The downlink data of transport layer carries out precoding, and line link of going forward side by side adaptively sends afterwards, specifically includes:

Determine the CSI feedback configuration that each transport layer uses；

For each transport layer, the CSI feedback used using the transport layer is configured to prelist in corresponding figuration vector sum CSI The pre-coding matrix of code matrix instruction PMI instruction carries out precoding to downlink data, is configured using the CSI feedback that the transmission uses CQI in corresponding CSI is sent after carrying out link circuit self-adapting.

Preferably, when determining the CSI feedback configuration that each transport layer uses, the N number of CSI feedback fed back from UE is configured for base station In choose in best K CSI feedback configuration.The case where for using vertical waveform figuration vector downlink transfer, base station can be with Number of beams that vertical dimension uses is determined with reference to the CSI feedback configured number K of the recommendation.

The case where being combined below from network side and UE, the method for providing feeding back channel state information CSI provided by the invention With the specific embodiment of the method for transmission downlink data.

Embodiment

1) base station configures a CSI process to UE by high-level signaling, includes four CSI-RS resource configurations in CSI process It is configured with an IMR.Wherein, four CSI-RS resource carry out figuration using different vertical dimension figuration vectors.Meanwhile base station is logical It crosses high-rise instruction UE and needs to feed back the optimal corresponding location information of CSI-RS resource configuration and CSI of two of them.

2) UE carries out RSRP measurement based on four CSI-RS resource in the CSI process respectively, obtains each CSI-RS money The corresponding RSRP in source therefrom selects highest two CSI-RS resource of RSRP to configure as optimal CSI-RS resource.

3) UE carries out CSI measurement based on optimal two CSI-RS resource configuration, obtains corresponding RI/PMI/CQI.

4) UE feeds back optimal two CSI-RS resource configuration by PUCCH respectively and configures in four CSI-RS resource In index (each configuration so being fed back using 2 bits) and described two corresponding RI/PMI/ of configuration CQI。

5) simultaneously, the CSI-RS resource of UE also additional feedback 1 recommendation configures number, respectively corresponds 1 and 2 using 1 bit Two values.Wherein 1 recommendation is represented using the corresponding CSI of CSI-RS resource configuration optimal in two configurations, 2 represent recommendation Using the corresponding CSI of two CSI-RS resource of feedback.The recommendation in order to obtain, UE needs are calculated separately using optimal one A CSI-RS resource configures corresponding CSI and uses the corresponding CSI of two CSI-RS resource configurations respective for downlink transfer Channel capacity configures number using the corresponding CSI-RS resource of biggish channel capacity.The CSI-RS resource configuration number and feedback First CSI-RS resource configuration index composition 3 bits information, feed back to base station together.

6) index and CSI of the base station based on the UE two CSI-RS resource configuration reported, and the CSI-RS resource recommended Number is configured, determines the number of plies and precoding information of downlink data transmission, line link of going forward side by side is adaptive.Assuming that the CSI-RS that UE is reported Resource distribution number is 2, then base station determines that the transmission number of plies of downlink is the sum that two CSI-RS resource configure corresponding RI, and each CSI-RS resource configure corresponding transport layer using the configuration vertical figuration vector and the corresponding PMI of the configuration obtain it is pre- The precoding of encoder matrix progress downlink.

Base station, which can be known, through the embodiment of the present invention makes the maximized vertical dimension number of beams of downlink capacity, to be based on The CSI of each wave beam of the number of beams and UE feedback carries out downlink transfer.

Since the number of beams of UE feedback CSI is more than or equal to the number of beams that UE recommends, base station can be according to scheduling Situation selects more suitable vertical dimension wave number quantity, certainly, the number of beams not necessarily recommended using the side UE.

Based on the same inventive concept, the method for feeding back channel state information CSI a kind of is additionally provided in the embodiment of the present invention With the device of transmission downlink data, a kind of method of the principle and feeding back channel state information CSI that are solved the problems, such as due to the device It is similar with the transmission method of downlink data, therefore the implementation of the device may refer to the implementation of method, overlaps will not be repeated.

The embodiment of the present invention provides a kind of user equipment (UE), as shown in fig. 7, comprises:

Determination unit 701 is configured, determines that at least one CSI feedback of base station configuration configures for the instruction according to base station Group, each CSI feedback configuration group include the configuration of at least one CSI feedback, and the CSI feedback is configured for downlink CSI measurement It is configured with the downlink signal of feedback；

Feedback determination unit 702, in any CSI feedback configuration group of base station configuration, determination need to carry out CSI feedback N number of CSI feedback configuration determines the CSI feedback configuration recommended based on determining N number of CSI feedback configuration and corresponding CSI Number K, N are not more than the CSI feedback configuration group, and K is the positive integer no more than N；

Reporting unit 703, location information and its corresponding CSI for configuring the N number of CSI feedback determined, and The CSI feedback configuration number K is reported to base station.

According to the agreement with base station, the value of N is determined；

The high-level signaling sent by base station, determines the value of N；

Determine that all possible CSI feedback no more than N configures number i；

The embodiment of the present invention also provides a kind of user equipment (UE), as shown in figure 8, including processor 800,810 and of transceiver Memory 820, in which:

Processor 800 executes following process: determining base according to the instruction of base station for reading the program in memory 820 Stand configuration at least one CSI feedback configuration group, each CSI feedback configuration group include at least one CSI feedback configuration, it is described CSI feedback is configured for downlink CSI measurement and the downlink signal configuration of feedback；Any CSI feedback of base station configuration is matched Group is set, determination need to carry out N number of CSI feedback configuration of CSI feedback, configure based on determining N number of CSI feedback and corresponding CSI determines that the CSI feedback recommended configures number K, and N is no more than the CSI feedback configuration sum that the CSI feedback configuration group includes, K The location information and its corresponding CSI and CSI for configuring N number of CSI feedback of the determination no more than the positive integer of N are anti- Feedback configuration number K, is reported to base station by transceiver 810；

Transceiver 810, for sending and receiving data under the control of processor 800.

Wherein, in fig. 8, bus architecture may include the bus and bridge of any number of interconnection, specifically by processor 800 The various circuits for the memory that the one or more processors and memory 820 of representative represent link together.Bus architecture is also Various other circuits of such as peripheral equipment, voltage-stablizer and management circuit or the like can be linked together, these are all It is it is known in the art, therefore, it will not be further described herein.Bus interface provides interface.Transceiver 810 can To be multiple element, that is, includes transmitter and receiver, the list for communicating over a transmission medium with various other devices is provided Member.For different user equipmenies, user interface 830, which can also be, external the interface for needing equipment is inscribed, and connection is set Standby including but not limited to keypad, display, loudspeaker, microphone, control stick etc..

Processor 800, which is responsible for management bus architecture and common processing, memory 820, can store processor 600 and is holding Used data when row operation.

The embodiment of the present invention also provides a kind of base station, as shown in Figure 9, comprising:

Configuration unit 901, for configuring at least one CSI back configuration group for user equipment (UE) and referring to Show to UE, each CSI feedback configuration group includes the configuration of at least one CSI feedback, and the CSI feedback is configured for downlink CSI The configuration of the downlink signal of measurement and feedback；

Feedback information receiving unit 902 is matched for receiving N number of CSI feedback in each CSI feedback configuration group that UE is reported The CSI feedback configuration number K that the location information and its corresponding CSI and UE set recommend base station to use；

Transmission unit 903, the location information and its corresponding CSI of N number of CSI feedback configuration for being reported according to UE, and CSI feedback configures number K, determines the downlink data transmission number of plies and carries out precoding to the downlink data of each transport layer, and carries out chain Road is adaptively sent afterwards.

Preferably, configuration unit 901 will configure at least one CSI feedback configuration group for UE and be indicated to UE, specifically include:

Preferably, CSI includes order instruction RI, and transmission unit 903 can be, but not limited to determine lower line number with the following method According to the transmission number of plies:

Preferably, CSI includes order channel quality indicator (CQI) and pre-coding matrix instruction PMI, and transmission unit 903 is to each biography The downlink data of defeated layer carries out precoding, and line link of going forward side by side adaptively sends afterwards, specifically includes:

Determine the CSI feedback configuration that each transport layer uses；

The embodiment of the present invention also provides a kind of base station, as shown in Figure 10, including processor 100, transceiver 110 and memory 120, in which:

Processor 100 executes following process for reading the program in memory 120:

At least one CSI back configuration group is configured for user equipment (UE), and is indicated by transceiver 110 To UE, each CSI feedback configuration group includes the configuration of at least one CSI feedback, and the CSI feedback is configured for downlink CSI survey The configuration of the downlink signal of amount and feedback；

The position letter of N number of CSI feedback configuration in each CSI feedback configuration group that UE is reported is received by transceiver 110 The CSI feedback configuration number K that breath and its corresponding CSI and UE recommend base station to use；

According to the location information of the UE N number of CSI feedback configuration reported and its corresponding CSI and CSI feedback configuration number K, really Determine the downlink data transmission number of plies and precoding is carried out to the downlink data of each transport layer, passes through transmitting-receiving after line link of going forward side by side is adaptive Machine 110 is sent；

Transceiver 110, for sending and receiving data under the control of processor 100.

Wherein, in Figure 10, bus architecture may include the bus and bridge of any number of interconnection, specifically by processor The various circuits for the memory that 100 one or more processors represented and memory 120 represent link together.Bus architecture Various other circuits of such as peripheral equipment, voltage-stablizer and management circuit or the like can also be linked together, these It is all it is known in the art, therefore, it will not be further described herein.Bus interface provides interface.Transceiver 110 It can be multiple element, that is, include transmitter and transceiver, provide for over a transmission medium being communicated with various other devices Unit.Processor 500, which is responsible for management bus architecture and common processing, memory 120, can store processor 100 and is executing behaviour Used data when making.

The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates, Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or The function of being specified in multiple boxes.

These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one The step of function of being specified in a box or multiple boxes.

Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as It selects embodiment and falls into all change and modification of the scope of the invention.

Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies Within, then the present invention is also intended to include these modifications and variations.

Claims

1. a kind of method of user equipment (UE) feeding back channel state information CSI characterized by comprising

Determine that at least one CSI feedback configuration group of base station configuration, each CSI feedback configuration group include extremely according to the instruction of base station Few CSI feedback configuration, the CSI feedback are configured for downlink CSI measurement and the downlink signal configuration of feedback；

For any CSI feedback configuration group of base station configuration, determination need to carry out N number of CSI feedback configuration of CSI feedback, based on true Fixed N number of CSI feedback configuration and corresponding CSI determine that the CSI feedback recommended configures number K, and N matches no more than the CSI feedback The CSI feedback configuration sum that group includes is set, K is the positive integer no more than N, and the CSI feedback configuration number of the recommendation is K, is indicated Recommend base station to configure corresponding CSI using K CSI feedback best in N number of CSI feedback configuration of UE feedback to pass for downlink It is defeated；

It will be on the location information and its corresponding CSI and CSI feedback configuration number K of determining N number of CSI feedback configuration Offer base station.

2. the method as described in claim 1, which is characterized in that

The CSI feedback is configured to CSI process, or configures for non-zero power channel state information reference signals NPZ CSI-RS, Or it is configured for interferometry resource IMR.

3. the method as described in claim 1, which is characterized in that determine the value of N using following either type:

According to the agreement with base station, the value of N is determined；

The high-level signaling sent by base station, determines the value of N；

4. method as claimed in claim 1 or 3, which is characterized in that

When determining that N is 1, after determination need to carry out 1 CSI feedback configuration of CSI feedback, determine that the CSI feedback recommended configures number K It is 1；

The location information of 1 CSI feedback configuration of the determination and its corresponding CSI are reported to base station, do not report CSI feedback Configure number K；Or the location information of 1 CSI feedback configuration of the determination and its corresponding CSI are reported to base station, simultaneously CSI feedback configuration number K is reported to be fixed as 1.

5. method as claimed in claim 1 or 3, which is characterized in that from each CSI feedback configuration group that base station configures, really Surely N number of CSI feedback configuration that CSI feedback need to be carried out, specifically includes:

To in CSI feedback configuration group each CSI feedback configuration carry out Reference Signal Received Power RSRP measurement, according to RSRP from High to Low sequence selects the corresponding CSI feedback configuration of N number of RSRP to configure as the N number of CSI feedback that need to carry out CSI feedback；Or Person

Channel quality indicator (CQI) measurement is carried out to each CSI feedback configuration in CSI feedback configuration group, from high to low according to CQI Sequence, select the configuration of N number of CQI corresponding CSI feedback as the N number of CSI feedback configuration that need to carry out CSI feedback；Or

Channel state information CSI measurement is carried out to each CSI feedback configuration in CSI feedback configuration group, and is measured and is tied according to CSI Fruit obtains corresponding transport block size TBsize, according to the sequence of TBsize from big to small, selects N number of TBsize to correspond to CSI anti- Feedback configuration is configured as the N number of CSI feedback that need to carry out CSI feedback.

6. method as claimed in claim 1 or 3, which is characterized in that when N is greater than 1, further includes:

7. method as claimed in claim 6, which is characterized in that Xiang Jizhan reports opposite between N number of CSI feedback configuration Phase information specifically includes:

It is reported after relative phase information between N number of CSI feedback configuration is configured number K combined coding with the CSI feedback To base station；Or

Location information combined coding by the relative phase information between N number of CSI feedback configuration, with the configuration of N number of CSI feedback After be reported to base station.

8. method as claimed in claim 1 or 3, which is characterized in that report the location information of N number of CSI feedback configuration To base station, specifically include:

One CSI feedback configuration group corresponds to a position sequence, and each CSI feedback in the CSI feedback configuration group, which configures, to be corresponded to A bit in the position sequence, by N number of CSI feedback configure the bit in corresponding position sequence be set to and other After the different value of bit, the corresponding position sequence of feedback configuration group at place is reported to base station.

9. method as claimed in claim 1 or 3, which is characterized in that configured based on determining N number of CSI feedback and corresponding CSI determines that the CSI feedback recommended configures number K, specifically includes:

10. method as claimed in claim 9, which is characterized in that configured based on determining N number of CSI feedback and corresponding CSI determines that the CSI feedback recommended configures number K, specifically includes:

Determine that all possible CSI feedback no more than N configures number i；

Number i is configured for each CSI feedback, it is assumed that base station selects i optimal CSI feedbacks to match from the configuration of N number of CSI feedback It sets corresponding CSI and carries out corresponding down channel capacity or the transport block size TBsize of downlink when downlink data transmission；

Determine that the CSI feedback configuration number i for obtaining the transport block size TBsize of maximum downstream channel capacity or maximum downstream is The CSI feedback of recommendation configures number K.

11. the method as described in claim 1, which is characterized in that CSI feedback configuration number K is reported to base station, is specifically included:

12. a kind of method of base station transmission downlink data characterized by comprising

At least one CSI back configuration group is configured for user equipment (UE) and is indicated to UE, and each CSI feedback is matched Setting group includes that at least one CSI feedback configures, and the CSI feedback is configured for the downlink signal of downlink CSI measurement and feedback Configuration；

The location information and its corresponding CSI of N number of CSI feedback configuration in each CSI feedback configuration group that UE is reported are received, and The CSI feedback that UE recommends configures number K, and the CSI feedback configuration number of the recommendation is K, indicates that base station is recommended to use the N number of of UE feedback K best CSI feedback configures corresponding CSI and is used for downlink transfer in CSI feedback configuration；

According to the location information of the UE N number of CSI feedback configuration reported and its corresponding CSI and CSI feedback configuration number K, under determining Row data transfer layer number simultaneously carries out precoding to the downlink data of each transport layer, and line link of going forward side by side adaptively is sent afterwards.

13. method as claimed in claim 12, which is characterized in that

14. a kind of user equipment (UE) characterized by comprising

Determination unit is configured, at least one CSI feedback configuration group of base station configuration is determined for the instruction according to base station, each CSI feedback configuration group include at least one CSI feedback configuration, the CSI feedback be configured for downlink CSI measurement and feedback Downlink signal configuration；

Feedback determination unit, in any CSI feedback configuration group of base station configuration, determination need to carry out N number of CSI of CSI feedback Feedback configuration determines that the CSI feedback recommended configures number K, N is not based on determining N number of CSI feedback configuration and corresponding CSI Greater than the CSI feedback configuration group, K is the positive integer no more than N, and the CSI feedback configuration number of the recommendation is K, indicates to recommend base It stands and configures corresponding CSI for downlink transfer using K CSI feedback best in N number of CSI feedback configuration of UE feedback；

Reporting unit, location information and its corresponding CSI and CSI for configuring the N number of CSI feedback determined Feedback configuration number K is reported to base station.

15. UE as claimed in claim 14, which is characterized in that

16. UE as claimed in claim 14, which is characterized in that the feedback determination unit determines N using following either type Value:

According to the agreement with base station, the value of N is determined；

The high-level signaling sent by base station, determines the value of N；

17. the UE as described in claim 14 or 16, which is characterized in that

When the feedback determination unit determines that N is 1, after determination need to carry out 1 CSI feedback configuration of CSI feedback, determines and recommend CSI feedback configuration number K be 1；

The location information that 1 CSI feedback of the determination configures and its corresponding CSI are reported to base station by the reporting unit, CSI feedback is not reported to configure number K；Or on the location information and its corresponding CSI for configuring 1 CSI feedback of the determination Base station is offered, while CSI feedback configuration number K being reported to be fixed as 1.

18. the UE as described in claim 14 or 16, which is characterized in that it is every that the feedback determines that determination unit is configured from base station In a CSI feedback configuration group, determination need to carry out N number of CSI feedback configuration of CSI feedback, specifically include:

19. UE as claimed in claim 14, which is characterized in that in feedback determination unit when N is greater than 1, the reporting unit It is also used to:

20. UE as claimed in claim 19, which is characterized in that the reporting unit reports N number of CSI feedback to match to base station Relative phase information between setting, specifically includes:

21. UE as claimed in claim 14, which is characterized in that the feedback determination unit is matched based on determining N number of CSI feedback It sets and corresponding CSI, the determining CSI feedback recommended configures number K, specifically include:

Based on determining N number of CSI feedback configuration and corresponding CSI, the transmission for making down channel capacity maximum downstream is determined The maximum CSI feedback configuration number of block size TBsize is the CSI feedback configuration number K recommended.

22. UE as claimed in claim 21, which is characterized in that the feedback determination unit is configured based on determining N number of CSI feedback And corresponding CSI, it determines that the CSI feedback recommended configures number K, specifically includes:

Determine that all possible CSI feedback no more than N configures number i；

Number i is configured for each CSI feedback, it is assumed that base station selects i optimal CSI anti-from N number of CSI feedback configuration Feedback configures the transport block size TBsize that corresponding CSI is used for corresponding down channel capacity downlink when downlink data transmission；

23. UE as claimed in claim 14, which is characterized in that CSI feedback configuration number K is reported to base by the reporting unit It stands, specifically includes:

24. a kind of base station characterized by comprising

Configuration unit, for configuring at least one CSI back configuration group for user equipment (UE) and being indicated to UE, Each CSI feedback configuration group includes the configuration of at least one CSI feedback, and the CSI feedback is configured for downlink CSI measurement and anti- The downlink signal of feedback configures；

Feedback information receiving unit, for receiving the position of the configuration of N number of CSI feedback in each CSI feedback configuration group that UE is reported The CSI feedback that confidence breath and its corresponding CSI and UE recommend configures number K, and the CSI feedback configuration number of the recommendation is K, indicates Recommend base station to configure corresponding CSI using K CSI feedback best in N number of CSI feedback configuration of UE feedback to pass for downlink It is defeated；

Transmission unit, the location information and its corresponding CSI and CSI feedback of N number of CSI feedback configuration for being reported according to UE Number K is configured, determine the downlink data transmission number of plies and precoding is carried out to the downlink data of each transport layer, line link of going forward side by side is adaptive After send.

25. base station as claimed in claim 24, which is characterized in that