CN101771505A - Method and system for indicating extra pre-coding matrix index - Google Patents

Method and system for indicating extra pre-coding matrix index Download PDF

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CN101771505A
CN101771505A CN201010002252A CN201010002252A CN101771505A CN 101771505 A CN101771505 A CN 101771505A CN 201010002252 A CN201010002252 A CN 201010002252A CN 201010002252 A CN201010002252 A CN 201010002252A CN 101771505 A CN101771505 A CN 101771505A
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coding matrix
matrix index
extra pre
extra
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CN101771505B (en
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李儒岳
徐俊
陈艺戬
郁光辉
戴博
张峻峰
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0025—Transmission of mode-switching indication

Abstract

The invention discloses a method and a system for indicating an extra pre-coding matrix index. The method comprises the following steps of: determining the type of the extra pre-coding matrix index by using a user equipment (UE) and sending an indication information for indicating the extra pre-coding matrix index in an uplink control information to a base station (eNB), or determining the type of the extra pre-coding matrix index by the eNB and sending the indication information for indicating the extra pre-coding matrix index in a downlink control message or high-level configured signaling to the UE, wherein the type of the extra pre-coding matrix index is the best conjugated pre-coding matrix index (BCI) or the worst conjugated pre-coding matrix index (WCI). The method and the system of the invention not only can promote the performance of multi-user MIMO or multipoint cooperation transmission COMP but also can guide the base station to easily realize the multi-user MIMO or multipoint cooperation transmission COMP.

Description

A kind of indicating means and system of extra pre-coding matrix index
Technical field
The present invention relates to the communications field, relate in particular to a kind of indicating means and system of extra pre-coding matrix index.
Background technology
In long evolving system (LTE:Long Term Evolution), the information (CSI:Channel State Information, i.e. channel condition information) of reflection down physical channel state has three kinds of forms: channel quality indication (CQI:Channels quality indication), pre-coding matrix indication (PMI:Pre-coding Matrix Indicator), order indication (RI:Rank Indicator).
CQI is for weighing an index of down channel quality quality.CQI represents with 0～15 integer value in the 36-213 agreement, has represented different CQI grades respectively, and different CQI correspondences modulation system and encoder bit rate (MCS) separately, are divided into 16 kinds of situations, can adopt 4 bit informations to represent.
PMI only is meant that under this emission mode of Closed-Loop Spatial Multiplexing subscriber equipment (UE:UserEquipment) tells according to the channel quality that records which type of pre-coding matrix base station (eNB:eNode B) should use to carry out precoding to the PDSCH channel of issuing this UE.The feedback granularity of PMI can be PMI of whole bandwidth feedback, also can wide according to subband (subband) feed back PMI.
RI is used to describe the number of space independent channel, the order of respective channels response matrix.Under Open-Loop Spatial Multiplexing and Closed-Loop Spatial Multiplexing pattern, need UE feedback RI information, do not need to feed back RI information under other patterns.The sum of ranks number of plies correspondence of channel matrix.
Rank of matrix has two kinds of definite methods, and the order of the channel that a kind of heap(ed) capacity criterion that is based on single user (SU) is determined is mainly used in single user's multiple-input and multiple-output (MIMO:Multiple InputMultiple Output); Another kind is a size of determining RI according to the relative value of characteristic value.In fact, also have other method to determine that order, concrete grammar depend on concrete use scene.
In the LTE system, CQI/PMI, the feedback of RI can be periodic feedback, also can be acyclic feedback, concrete feedback is as shown in table 2:
Table 2 periodic feedback and the corresponding uplink physical channel of aperiodicity feedback
Scheduling method Periodicity CQI reporting channel Aperiodicity CQI reporting channel
Frequency is non-selective ??PUCCH
Frequency selectivity ??PUCCH ??PUSCH
Wherein, CQI/PMI for periodic feedback, RI, if UE does not need to send data, the CQI/PMI of periodic feedback then, RI go control channel (PUCCH:Physical UplinkControl Channel) physically and go up the transmission with form 2/2a/2b (PUCCH format2/2a/2b), if when UE need send data, then CQI/PMI transmits in the capable physically shared channel (PUSCH:PhysicalUplink Shared Channel) of RI; For the CQI/PMI of aperiodicity feedback, RI only transmits on PUSCH.
In the LTE system, under the different transmission modes, the periodicity CQI/PMI of PUCCH channel, the load of RI (payload size) difference, but maximum load is 11 bits.During periodic feedback, and the employing Reed-Muller of elder generation (20, the A) M that will feed back (M＜=11) bit CQI/PMI, the RI coding, the bit after will encoding is then modulated, with the form transmission of PUCCH form 2/2a/2b.
Advanced long-term evolution system (LTE-A:Long Term EvolutionAdvanced) as the evolution standard of LTE needs to support bigger system bandwidth (reaching as high as 100MHz), and need to improve the spectrum efficiency of average spectral efficiency (ase) and Cell Edge User, for this reason, the LTE-A system has introduced a lot of new technologies: the high-order mimo that (1) is descending, the LTE system descending is supported 4 antenna transmission at most, and the introducing of high-order mimo makes the LTE-A system descending support the transmission of 8 antennas at most, and then the dimension of channel state matrix increases; (2) cooperative multipoint transmission (CoMP:Coordinated multiple pointtransmission), this technology is exactly to utilize the cooperation transmission of a plurality of sub-districts transmitting antenna, and UE may need to feed back the channel condition information of a plurality of sub-districts so.
In LTE-A, many companies have proposed to improve the performance of single sub-district multiuser MIMO and many cell mimos (COMP) by the enhancing to the UE feedback.Compare with version 8 (LTE standard), the feedback of UE need increase the report of extra pre-coding matrix index (being extra PMI).Extra PMI has two kinds of forms, and a kind of is BCI (best-companion PMI), and another kind is WCI (worst-companion PMI).
BCI is for preferably following pre-coding matrix index, perhaps preferably matches pre-coding matrix index, how to be meant with in the sub-district or presence of intercell interference reduce to the information of best-case.When eNB realized the UE pairing of multiuser MIMO on identical time and frequency resource, based on this extra information, UE can observe in the lower sub-district and disturb.
WCI (worst-companion PMI) is the poorest pre-coding matrix index of following, perhaps the poorest pairing pre-coding matrix index, how to be meant with in the sub-district or presence of intercell interference be generated to maximum information. that is to say that WCI has indicated the worst situation that avoid.
Giving an example below illustrates BCI and WCI, but does not get rid of other form.Suppose that eNB has N T=8 transmitting antennas, UE also has N R=8 antennas, the channel matrix H that measure at regular hour frequency resource UE this moment kSize be 8*8, if to channel correlation matrix H k HH kCarry out spectral factorization, can obtain following form:
= | σ 1 | 2 v 1 v 1 H + · · · + | σ N T | 2 v N T v N T H
Here, H kBe the channel matrix of K UE, its size is N R* N T, N TBe the number of eNB transmitting antenna, N RBe the number of UE reception antenna, v 1
Figure G201010002252XD00033
Be H k HH kCharacteristic vector, v iSize is N T* 1, i=1 ..., N T, | σ 1| 2,
Figure G201010002252XD00034
Be the relevant battle array of channel H k HH kCharacteristic value, N wherein T=8, N R=8.In addition, described v 1
Figure G201010002252XD00035
Constituted channel matrix H kThe SVD right unitary matrice of decomposing.
As shown in Figure 1, if | σ 1| 2, | σ 2| 2Obviously greater than | σ 3| 2, | σ 4| 2And | σ 1| 2, | σ 2| 2, | σ 3| 2, | σ 4| 2Obviously greater than | σ 5| 2, | σ 6| 2, | σ 7| 2, | σ 8| 2(very little), then first and second characteristic vector space is used for transmission signals, can be called as signal PMI; Third and fourth characteristic vector space has constituted the poorest pairing PMI; The the 5th to eight characteristic vector space has constituted and has preferably matched PMI.Need explanation, the division of signal PMI, BCI and WCI and identification are not limited to described embodiment, and they are determined according to specified criteria by UE in a word.
Use many antennas at transmitting terminal (eNB), we can take the mode of spatial reuse to improve transmission rate, the different data of the i.e. emission of different antennae position on the identical running time-frequency resource of transmitting terminal, (UE) also uses many antennas at receiving terminal, we can distribute to same user with the resource of all antennas under single user's situation, this transmission form is called SU-MIMO (Single User MIMO), we also can give different user with the resource allocation in different antennae space under multi-user's situation in addition, and this transmission form is called MU-MIMO (multiuser MIMO).
In the LTE-A system, descending multiuser MIMO and the multipoint cooperative transmission COMP of needing.When UE was fewer, the report that increases extra PMI should be the WCI report if the BCI report will be difficult to realize matching so increase the report of extra PMI; When UE is many, realize pairing than being easier to, increase the report of extra PMI if BCI reports that MU-MIMO or COMP can obtain more performance.In addition, in the time of high s/n ratio, because noise is very little, played the part of decisive role so disturb, the report that increases extra PMI is if the BCI report, can better suppress interference, thereby improve the performance of MU-MIMO or COMP better, should be the BCI report so increase the report of extra PMI; In the time of low signal-to-noise ratio,,, increase the report of extra PMI if the WCI report although can increase interference on a small quantity, can better realize the pairing between the user so disturb the influence of size also little because noise is very big.In addition, for the low-rank situation, increase the report of extra PMI if the WCI report is relatively good; For the situation of high order, increase the report of extra PMI if the BCI report is relatively good.
According to foregoing, the report that increases extra PMI not only may be BCI but also may be WCI, and BCI has different use scenes with WCI.Though the feedback that prior art proposes to increase can be the feedback of BCI or WCI, by which entity is selected, and how to indicate the BCI or the WCI of selection, is the problem of needing solution at present badly,
Summary of the invention
The technical problem to be solved in the present invention is exactly indicating means and the system that proposes a kind of extra pre-coding matrix index, solves the problem of the pre-coding matrix index type that indication selects.
In order to solve the problems of the technologies described above, the invention provides a kind of indicating means of extra pre-coding matrix index, comprising:
Subscriber equipment (UE) is determined extra pre-coding matrix index type, carries the indication information that is used to indicate extra pre-coding matrix index type in ascending control information, sends to base station (eNB); Perhaps,
ENB determines extra pre-coding matrix index type, carries the indication information that is used to indicate extra pre-coding matrix index type in Downlink Control Information or high-rise configuration signal, sends to UE.
Wherein, described extra pre-coding matrix index type is for preferably matching pre-coding matrix index (BCI) or the poorest pairing pre-coding matrix index (WCI).
Further, said method also can have following characteristics:
Described extra pre-coding matrix index is the index of a quantization matrix or the index of one or more quantification vector.
Further, said method also can have following characteristics:
Described indication information is the differentiation indication information of BCI or WCI.
Further, said method also can have following characteristics:
Described ascending control information is the channel condition information that comprises extra pre-coding matrix index.
Further, said method also can have following characteristics:
The described channel condition information that comprises extra pre-coding matrix index specifically comprises:
One or more pre-coding matrixes indications (PMI), BCI or the differentiation indication information of WCI, one or more extra pre-coding matrix index and one or more channel quality indication (CQI) information (CQI).
Further, said method also can have following characteristics:
Described high-rise configuration signal is Radio Resource control (RRC) signaling.
Further, said method also can have following characteristics:
Described eNB determines extra pre-coding matrix index type, carries indication information in Downlink Control Information or high-rise configuration signal, sends to after the step execution of UE, also carries out:
Described UE is known extra pre-coding matrix index type according to the indication information that receives, and sends to comprise the channel condition information of extra pre-coding matrix index to described eNB.
Further, said method also can have following characteristics:
The described channel condition information that comprises extra pre-coding matrix index specifically comprises:
One or more PMI, one or more extra pre-coding matrix index and one or more CQI.
In order to solve the problems of the technologies described above, the invention provides a kind of indication mechanism of extra pre-coding matrix index, comprise UE and eNB,
Described UE is used for determining extra pre-coding matrix index type, carries the indication information that is used to indicate extra pre-coding matrix index type in ascending control information, sends to eNB;
Described eNB is used for knowing extra pre-coding matrix index type according to receiving indication information;
Wherein, described extra pre-coding matrix index type is BCI or WCI.
In order to solve the problems of the technologies described above, the invention provides a kind of indication mechanism of extra pre-coding matrix index, comprise UE and eNB,
Described eNB is used for determining extra pre-coding matrix index type, carries the indication information that is used to indicate extra pre-coding matrix index type in Downlink Control Information or high-rise configuration signal, sends to UE;
Described UE is used for knowing extra pre-coding matrix index type according to receiving indication information;
Wherein, described extra pre-coding matrix index type is BCI or WCI.
The present invention is suitable for selecting under the different use scenes BCI or WCI to feed back, use the present invention, not only make the performance of multiuser MIMO or multipoint cooperative transmission COMP be improved, and make easier realization multiuser MIMO in base station or multipoint cooperative transmit COMP.
Description of drawings
Fig. 1 is a kind of feature space exploded view of 88 collection of letters road matrixes;
Fig. 2 is the indicating means flow chart of the extra pre-coding matrix index of inventive embodiments one;
Fig. 3 is a kind of feature space exploded view of 44 collection of letters road matrixes;
Fig. 4 is a kind of ascending control information form that comprises differentiation indication information, BCI or the WCI of BCI or WCI;
A kind of ascending control information form that comprises BCI or WCI of Fig. 5.
Embodiment
Among the present invention, adopt dual mode indication pre-coding matrix index type:
Mode one
UE determines extra pre-coding matrix index type, carries the indication information that is used to indicate extra pre-coding matrix index type in ascending control information (UCI), sends to the base station.
Wherein, described extra pre-coding matrix index type is BCI or WCI.
Described indication information is the differentiation indication information of BCI or WCI, is used to indicate current extra pre-coding matrix index to be meant that BCI also is meant WCI.
Described extra pre-coding matrix index is the index of a quantization matrix or the index of one or more quantification vector.
UE increases indication information in the ascending control information form, described ascending control information is the channel condition information that comprises extra pre-coding matrix index.
The described channel condition information that comprises extra pre-coding matrix index specifically comprises:
One or more PMI, BCI or the differentiation indication information of WCI, one or more extra pre-coding matrix index and one or more CQI.Wherein, the pre-coding matrix index of described extra increase can only be BCI or WCI both one of, this is consistent with the indication of differentiation indication information of the BCI that carries or WCI in this channel condition information.
Mode two
Extra pre-coding matrix index type is determined in the base station, carries the indication information that is used to indicate extra pre-coding matrix index type in Downlink Control Information or high-rise configuration signal, sends to UE.
Wherein, described extra pre-coding matrix index type is BCI or WCI.
Described extra pre-coding matrix index BCI or WCI are the index of a quantization matrix or the index of one or more quantification vector.
Described indication information is the differentiation indication information of BCI or WCI, is used to indicate current extra pre-coding matrix index to be meant that BCI also is meant WCI.
Indication information is added in the base station in Downlink Control Information, perhaps carry indication information in descending high-rise configuration signal, and wherein " high level " is often referred to the above layer of physical layer, and described high-rise configuration signal can be Radio Resource control (RRC) signaling.
Described UE is known extra pre-coding matrix index type according to the indication information that receives, and sends to comprise the channel condition information of extra pre-coding matrix index to described base station.
The described channel condition information that comprises extra pre-coding matrix index specifically comprises:
One or more PMI, one or more extra pre-coding matrix index and one or more (CQI).Wherein, the pre-coding matrix index of described extra increase can only be BCI or WCI both one of, this depends on the indication of indication information in Downlink Control Information or the high-rise configuration signal.
The present invention can be applicable in pairing Single User MIMO (SU-MIMO) system or multiuser MIMO (MU-MIMO) system or in the multipoint cooperative COMP system.
The present invention is described in detail below in conjunction with drawings and the specific embodiments.
Embodiment one
As shown in Figure 2, determine extra pre-coding matrix index type, specifically may further comprise the steps by UE:
S201, transmitting terminal (is the base station, eNB) sends pilot tone to UE, be used for UE test down channel state;
S203, UE estimates down channel according to the pilot frequency information that receives;
S205, UE determine extra pre-coding matrix index type, determine that promptly up channel State Control information comprises BCI or comprises WCI;
S207, the control information of UE feeding back uplink channel status is to transmitting terminal;
Wherein, the channel status control information of UE feedback comprises: comprise some precoding matrix indicators (PMI), some extra pre-coding matrix indexes, an indication information of distinguishing BCI or WCI, some channel quality indication (CQI) informations (CQI);
Transmitting terminal knows that according to the differentiation BCI of UE feedback or the indication information of WCI extra pre-coding matrix index is BCI or WCI;
S209, transmitting terminal is dispatched according to the channel condition information that UE fed back, and the channel condition information in the configuration actual transmissions.
For example, suppose that eNB has N T=4 transmitting antennas, UE also has N R=4 antennas, the channel matrix H that measure at regular hour frequency resource UE this moment kSize be 4*4, if to channel correlation matrix H k HH kCarry out spectral factorization, can obtain following form:
H k H H k = | σ 1 | 2 v 1 v 1 H + | σ 1 | 2 v 2 v 2 H + | σ 1 | 2 v 3 v 4 H + | σ 4 | 2 v 4 v 4 H
As shown in Figure 3, suppose if | σ 1| 2＞＞| σ 2| 2＞| σ 3| 2, | σ 4| 2, | σ 3| 2, | σ 4| 2Very little, then first characteristic vector space is used for transmission signals, can be called as signal PMI; Second characteristic vector space has constituted the poorest pairing PMI; Third and fourth characteristic vector space has constituted and has preferably matched PMI.Need explanation, the division of signal PMI, BCI and WCI and identification are not limited to described embodiment, and they are to be determined according to specific criterion by UE in a word.
Here, as shown in Figure 4, a kind of form of up channel status information reports comprises:
Encoder matrix designator (PMI), i.e. v 1The quantification vector index;
Extra pre-coding matrix index; Be v 3, v 4Two quantize vector index, perhaps v 3, v 4Constitute the quantization matrix index of matrix;
The differentiation indication information of BCI or WCI, value is 0, the extra pre-coding matrix index that increases of expression is BCI;
Some channel quality indication (CQI) information CQI;
As shown in Figure 4, another form of up channel status information reports comprises:
Encoder matrix designator (PMI), i.e. v 1The quantification vector index;
Extra pre-coding matrix index; Be v 2One quantize vector index;
The differentiation indication information of BCI or WCI, value is 1, the extra pre-coding matrix index that increases of expression is WCI;
Some channel quality indication (CQI) information CQI.
Wherein, N, M, K are positive integers more than or equal to 1 among Fig. 4.
UE is sent to eNB with above-mentioned channel status information reports, and eNB carries out the processing such as scheduling of Single User MIMO or multiuser MIMO or COMP according to described report.
Embodiment two
Determine extra pre-coding matrix index type by eNB, comprising: eNB determines extra pre-coding matrix index type, carries the indication information that is used to indicate extra pre-coding matrix index type in Downlink Control Information, sends to UE; UE is known extra pre-coding matrix index type according to the indication information that receives, and sends to comprise the channel condition information of extra pre-coding matrix index to described base station.
Wherein, channel condition information comprises: the pre-coding matrix index of some precoding matrix indicators (PMI), some extra increases, some channel quality indication (CQI) informations (CQI).Wherein, the pre-coding matrix index of described extra increase can only be BCI or WCI both one of, this depends on the indication information in the Downlink Control Information.
For example, suppose that eNB has N T=4 transmitting antennas, UE also has N R=4 antennas, the channel matrix H that measure at regular hour frequency resource UE this moment kSize be 4*4, if to channel correlation matrix H k HH kCarry out spectral factorization, can obtain following form:
H k H H k = | σ 1 | 2 v 1 v 1 H + | σ 1 | 2 v 2 v 2 H + | σ 1 | 2 v 3 v 4 H + | σ 4 | 2 v 4 v 4 H
As shown in Figure 3, suppose if | σ 1| 2＞＞| σ 2| 2＞| σ 3| 2, | σ 4| 2, | σ 3| 2, | σ 4| 2Very little, then first characteristic vector space is used for transmission signals, can be called as signal PMI; Second characteristic vector space has constituted the poorest pairing PMI; Third and fourth characteristic vector space has constituted and has preferably matched PMI.Need explanation, the division of signal PMI, BCI and WCI and identification are not limited to described embodiment, and they are to be determined according to specific criterion by UE in a word.
Here, as shown in Figure 5, the differentiation indication information of BCI/WCI is 0 in the Downlink Control Information, and a kind of form of then up channel status information reports comprises:
Encoder matrix designator (PMI), i.e. v 1The quantification vector index;
Extra pre-coding matrix index; Be v 3, v 4Two quantize vector index, perhaps v 3, v 4Constitute the quantization matrix index of matrix;
Some channel quality indication (CQI) information CQI;
As shown in Figure 5, if BCI/WCI differentiation indication information is 1 in the Downlink Control Information, another form of up channel status information reports comprises:
Encoder matrix designator (PMI), i.e. v 1The quantification vector index;
Extra pre-coding matrix index; Be v 2One quantize vector index;
Some channel quality indication (CQI) information CQI.
Wherein, N, M, K are positive integers more than or equal to 1 among Fig. 5.
UE is sent to eNB with above-mentioned channel status information reports, and eNB carries out the processing such as scheduling of Single User MIMO or multiuser MIMO or COMP according to described report.
Embodiment three
Determine extra pre-coding matrix index type by eNB, by configuration signal UE is carried out semi-static configuration, comprise: eNB determines extra pre-coding matrix index type, in high-rise configuration signal (RRC signaling), carry the indication information that is used to indicate extra pre-coding matrix index type, send to UE; UE is known extra pre-coding matrix index type according to the indication information that receives, and sends to comprise the channel condition information of extra pre-coding matrix index to described base station.
Wherein, channel condition information comprises: the pre-coding matrix index of some precoding matrix indicators (PMI), some extra increases, some channel quality indication (CQI) informations (CQI).Wherein, the pre-coding matrix index of described extra increase can only be BCI or WCI both one of, this depends on the indication information in the high-rise configuration signal.
For example, suppose that eNB has N T=4 transmitting antennas, UE also has N R=4 antennas, the channel matrix H that measure at regular hour frequency resource UE this moment kSize be 4*4, if to channel correlation matrix H k HH kCarry out spectral factorization, can obtain following form:
H k H H k = | σ 1 | 2 v 1 v 1 H + | σ 1 | 2 v 2 v 2 H + | σ 1 | 2 v 3 v 4 H + | σ 4 | 2 v 4 v 4 H
As shown in Figure 3, suppose if | σ 1| 2＞＞| σ 2| 2＞| σ 3| 2, | σ 4| 2, | σ 3| 2, | σ 4| 2Very little, then first characteristic vector space is used for transmission signals, can be called as signal PMI; Second characteristic vector space has constituted the poorest pairing PMI; Third and fourth characteristic vector space has constituted and has preferably matched PMI.Need explanation, the division of signal PMI, BCI and WCI and identification are not limited to described embodiment, and they are to be determined according to specific criterion by UE in a word.
Here, if the indication information that increases in the downstream arrangements signaling is 0, then as shown in Figure 5, a kind of form of up channel status information reports comprises:
Encoder matrix designator (PMI), i.e. v 1The quantification vector index;
Extra pre-coding matrix index; Be v 3, v 4Two quantize vector index, perhaps v 3, v 4Constitute the quantization matrix index of matrix;
Some channel quality indication (CQI) information CQI;
If increasing indication information in the downstream arrangements signaling is 1, then as shown in Figure 5, another form of up channel status information reports comprises:
Encoder matrix designator (PMI), i.e. v 1The quantification vector index;
Extra pre-coding matrix index; Be v 2One quantize vector index;
Some channel quality indication (CQI) information CQI.
Wherein, N, M, K are positive integers more than or equal to 1 among Fig. 5.
UE is sent to eNB with above-mentioned channel status information reports, and eNB carries out the processing such as scheduling of Single User MIMO or multiuser MIMO or COMP according to described report.
The indication mechanism of the extra pre-coding matrix index of the embodiment of the invention, comprise UE and base station, described UE is used for determining extra pre-coding matrix index type, carries the indication information that is used to indicate extra pre-coding matrix index type in ascending control information, sends to the base station; Described base station is used for knowing extra pre-coding matrix index type according to receiving indication information.
The indication mechanism of a kind of extra pre-coding matrix index of the embodiment of the invention, comprise UE and base station, described base station is used for determining extra pre-coding matrix index type, in Downlink Control Information or high-rise configuration signal, carry the indication information that is used to indicate extra pre-coding matrix index type, send to UE; Described UE is used for knowing extra pre-coding matrix index type according to receiving indication information.
In the foregoing description, the differentiation indication information of BCI or WCI, value is 0, the extra pre-coding matrix index that increases of expression is BCI; Value is 1, and the extra pre-coding matrix index that increases of expression is WCI.Certainly, also can be the differentiation indication information of BCI or WCI, value is 1, the extra pre-coding matrix index that increases of expression is BCI; Value is 0, and the extra pre-coding matrix index that increases of expression is WCI.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.

Claims (10)

1. the indicating means of an extra pre-coding matrix index comprises:
Subscriber equipment (UE) is determined extra pre-coding matrix index type, carries the indication information that is used to indicate extra pre-coding matrix index type in ascending control information, sends to base station (eNB); Perhaps,
ENB determines extra pre-coding matrix index type, carries the indication information that is used to indicate extra pre-coding matrix index type in Downlink Control Information or high-rise configuration signal, sends to UE;
Wherein, described extra pre-coding matrix index type is for preferably matching pre-coding matrix index (BCI) or the poorest pairing pre-coding matrix index (WCI).
2. the method for claim 1 is characterized in that,
Described extra pre-coding matrix index is the index of a quantization matrix or the index of one or more quantification vector.
3. the method for claim 1 is characterized in that,
Described indication information is the differentiation indication information of BCI or WCI.
4. method as claimed in claim 3 is characterized in that,
Described ascending control information is the channel condition information that comprises extra pre-coding matrix index.
5. method as claimed in claim 4 is characterized in that,
The described channel condition information that comprises extra pre-coding matrix index specifically comprises:
One or more pre-coding matrixes indications (PMI), BCI or the differentiation indication information of WCI, one or more extra pre-coding matrix index and one or more channel quality indication (CQI) information (CQI).
6. the method for claim 1 is characterized in that,
Described high-rise configuration signal is Radio Resource control (RRC) signaling.
7. the method for claim 1 is characterized in that,
Described eNB determines extra pre-coding matrix index type, carries indication information in Downlink Control Information or high-rise configuration signal, sends to after the step execution of UE, also carries out:
Described UE is known extra pre-coding matrix index type according to the indication information that receives, and sends to comprise the channel condition information of extra pre-coding matrix index to described eNB.
8. method as claimed in claim 7 is characterized in that,
The described channel condition information that comprises extra pre-coding matrix index specifically comprises:
One or more PMI, one or more extra pre-coding matrix index and one or more CQI.
9. the indication mechanism of an extra pre-coding matrix index comprises UE and eNB, it is characterized in that,
Described UE is used for determining extra pre-coding matrix index type, carries the indication information that is used to indicate extra pre-coding matrix index type in ascending control information, sends to eNB;
Described eNB is used for knowing extra pre-coding matrix index type according to receiving indication information;
Wherein, described extra pre-coding matrix index type is BCI or WCI.
10. the indication mechanism of an extra pre-coding matrix index comprises UE and eNB, it is characterized in that,
Described eNB is used for determining extra pre-coding matrix index type, carries the indication information that is used to indicate extra pre-coding matrix index type in Downlink Control Information or high-rise configuration signal, sends to UE;
Described UE is used for knowing extra pre-coding matrix index type according to receiving indication information;
Wherein, described extra pre-coding matrix index type is BCI or WCI.
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