CN102484890B - User device, base station and information feedback method - Google Patents

User device, base station and information feedback method Download PDF

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Publication number
CN102484890B
CN102484890B CN200980120199.9A CN200980120199A CN102484890B CN 102484890 B CN102484890 B CN 102484890B CN 200980120199 A CN200980120199 A CN 200980120199A CN 102484890 B CN102484890 B CN 102484890B
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covariance matrix
diagonal entry
sent
feedback
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CN102484890A (en
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闫志宇
李强
夏亮
任晓涛
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria

Abstract

A user device, base station and information feedback method is disclosed in the embodiments of the present invention. The method comprises the steps of: determining a feedback period of an element in a covariance matrix based on a determining strategy; feeding back the element in the covariance matrix to a network side according to the feedback period. In the embodiments of the present invention, the element in the covariance matrix is fed back to the network side according to the feedback period determined by the determining strategy. The feedback period of the element in the covariance matrix is augmented, the feedback load is reduced, and the efficiency of the wireless communication system is improved, with ensuring that the feedback element is valid.

Description

Subscriber equipment, base station and information feedback method
Technical field
The present invention relates to communication technical field, particularly subscriber equipment, base station and information feedback method.
Background technology
In existing communication system, in order to obtain descending scheduling accurately and effectively, gain, subscriber equipment (User Equipment, hereinafter to be referred as: UE) need to feed back to network side some relevant informations of access point, carrier wave or channel.Network side is dispatched resource according to above-mentioned feedack and is distributed, and better guarantees quality and the efficiency of communication system.
In order to increase message transmission rate, obtain larger throughput, in communication system, introduced multi-transceiver technology.In the communication system of multicarrier, network side completes Resource Distribution and Schedule still to be needed according to above-mentioned information, so UE need to feed back the channel of a plurality of access points, a plurality of carrier wave or a plurality of sub-carrier band or the element of channel disturbance to network side, carries out Resource Distribution and Schedule for network side.
But, because UE need to feed back the channel of a plurality of access points, a plurality of carrier wave or a plurality of sub-carrier band or all relevant informations of channel disturbance to network side, so feedback load is very large, seriously reduced the efficiency of communication system.
Summary of the invention
The embodiment of the present invention provides a kind of subscriber equipment, base station and information feedback method, in order to reduce UE to the feedback load of the interference element of network side feedback, improves the efficiency of wireless communication system.
The embodiment of the present invention provides a kind of information feedback method, comprising:
According to determining strategy, determine the feedback cycle of element in covariance matrix;
According to described feedback cycle, to network side, feed back the element in described covariance matrix;
Wherein, described definite strategy comprises one of following or its combination in any:
For the diagonal entry in described covariance matrix is set the feedback cycle that is less than the lower diagonal entry in described covariance matrix;
For the diagonal entry in described covariance matrix is set the feedback cycle that is less than the upper diagonal entry in described covariance matrix;
For the part diagonal entry in described covariance matrix is set the feedback cycle that is less than the diagonal entry except described part diagonal entry in described covariance matrix.
The embodiment of the present invention provides a kind of information feedback method, comprising:
Determine definite strategy of the feedback cycle of element in covariance matrix;
Described definite definite strategy is sent to subscriber equipment, so that subscriber equipment feeds back the element in covariance matrix according to described feedback cycle to network side;
Wherein, described definite strategy comprises one of following or its combination in any:
For the diagonal entry in described covariance matrix is set the feedback cycle that is less than the lower diagonal entry in described covariance matrix;
For the diagonal entry in described covariance matrix is set the feedback cycle that is less than the upper diagonal entry in described covariance matrix;
For the part diagonal entry in described covariance matrix is set the feedback cycle that is less than the diagonal entry except described part diagonal entry in described covariance matrix.
The embodiment of the present invention provides a kind of information feedback method, comprising:
According to determining strategy, determine element to be sent in covariance matrix;
To network side, feed back element to be sent in described covariance matrix;
Wherein, described definite strategy comprises one of following or its combination in any:
Diagonal entry in described covariance matrix is defined as to element to be sent;
Diagonal entry in described covariance matrix and upper diagonal entry are defined as to element to be sent;
Diagonal entry in described covariance matrix and lower diagonal entry are defined as to element to be sent;
Part diagonal entry in described covariance matrix is defined as to element to be sent.
The embodiment of the present invention provides a kind of information feedback method, comprising:
Determine definite strategy of element to be sent in covariance matrix;
Described definite definite strategy is sent to subscriber equipment, so that subscriber equipment feeds back element to be sent in covariance matrix according to described definite definite strategy to network side;
Wherein, described definite strategy comprises one of following or its combination in any:
Diagonal entry in described covariance matrix is defined as to element to be sent;
Diagonal entry in described covariance matrix and upper diagonal entry are defined as to element to be sent;
Diagonal entry in described covariance matrix and lower diagonal entry are defined as to element to be sent;
Part diagonal entry in described covariance matrix is defined as to element to be sent.
The embodiment of the present invention provides a kind of information feedback method, comprising:
According to determining strategy, determine the quantization granularities of element in covariance matrix;
According to described quantization granularities, to network side, feed back the element after quantification in described covariance matrix;
Wherein, described definite strategy comprises one of following or its combination in any:
For the diagonal entry in described covariance matrix is set the quantization granularities that is less than the lower diagonal entry in described covariance matrix;
For the diagonal entry in described covariance matrix is set the quantization granularities that is less than the upper diagonal entry in described covariance matrix;
For the part diagonal entry in described covariance matrix is set the quantization granularities that is less than the diagonal entry except described part diagonal entry in described covariance matrix.
The embodiment of the present invention provides a kind of information feedback method, comprising:
Determine definite strategy of the quantization granularities of element in covariance matrix;
Described definite definite strategy is sent to subscriber equipment, so that subscriber equipment feeds back the element after quantification in covariance matrix according to described quantization granularities to network side;
Wherein, described definite strategy comprises one of following or its combination in any:
For the diagonal entry in described covariance matrix is set the quantization granularities that is less than the lower diagonal entry in described covariance matrix;
For the diagonal entry in described covariance matrix is set the quantization granularities that is less than the upper diagonal entry in described covariance matrix;
For the part diagonal entry in described covariance matrix is set the quantization granularities that is less than the diagonal entry except described part diagonal entry in described covariance matrix.
The embodiment of the present invention provides a kind of subscriber equipment, comprising:
The first determination module, for determining the feedback cycle of covariance matrix element according to definite strategy;
The first feedback module, for feeding back the element of described covariance matrix according to the definite feedback cycle of described the first determination module to network side;
Wherein, described definite strategy comprises one of following or its combination in any:
For the diagonal entry in described covariance matrix is set the feedback cycle that is less than the lower diagonal entry in described covariance matrix;
For the diagonal entry in described covariance matrix is set the feedback cycle that is less than the upper diagonal entry in described covariance matrix;
For the part diagonal entry in described covariance matrix is set the feedback cycle that is less than the diagonal entry except described part diagonal entry in described covariance matrix.
The embodiment of the present invention provides a kind of base station, comprising:
Determination module, for determining definite strategy of the feedback cycle of covariance matrix element;
Sending module, sends to subscriber equipment for definite strategy that described determination module is determined, so that subscriber equipment feeds back the element in covariance matrix according to described feedback cycle to network side;
Wherein, described definite strategy comprises one of following or its combination in any:
For the diagonal entry in described covariance matrix is set the feedback cycle that is less than the lower diagonal entry in described covariance matrix;
For the diagonal entry in described covariance matrix is set the feedback cycle that is less than the upper diagonal entry in described covariance matrix;
For the part diagonal entry in described covariance matrix is set the feedback cycle that is less than the diagonal entry except described part diagonal entry in described covariance matrix.
The embodiment of the present invention provides a kind of subscriber equipment, comprising:
Determination module, for determining covariance matrix element to be sent according to definite strategy;
Feedback module, for feeding back the definite covariance matrix of described determination module element to be sent to network side;
Wherein, described definite strategy comprises one of following or its combination in any:
Diagonal entry in described covariance matrix is defined as to element to be sent;
Diagonal entry in described covariance matrix and upper diagonal entry are defined as to element to be sent;
Diagonal entry in described covariance matrix and lower diagonal entry are defined as to element to be sent;
Part diagonal entry in described covariance matrix is defined as to element to be sent.
The embodiment of the present invention provides a kind of base station, comprising:
Determination module, for determining definite strategy of the element that covariance matrix is to be sent;
Sending module, sends to subscriber equipment for definite strategy that described determination module is determined, so that subscriber equipment feeds back element to be sent in covariance matrix according to described definite definite strategy to network side;
Wherein, described definite strategy comprises one of following or its combination in any:
Diagonal entry in described covariance matrix is defined as to element to be sent;
Diagonal entry in described covariance matrix and upper diagonal entry are defined as to element to be sent;
Diagonal entry in described covariance matrix and lower diagonal entry are defined as to element to be sent;
Part diagonal entry in described covariance matrix is defined as to element to be sent.
The embodiment of the present invention provides a kind of subscriber equipment, comprising:
Determination module, for determining the quantization granularities of covariance matrix element according to definite strategy;
Feedback module, for feeding back the element after described covariance matrix quantizes according to the definite quantization granularities of described determination module to network side;
Wherein, described definite strategy comprises one of following or its combination in any:
For the diagonal entry in described covariance matrix is set the quantization granularities that is less than the lower diagonal entry in described covariance matrix;
For the diagonal entry in described covariance matrix is set the quantization granularities that is less than the upper diagonal entry in described covariance matrix;
For the part diagonal entry in described covariance matrix is set the quantization granularities that is less than the diagonal entry except described part diagonal entry in described covariance matrix.
The embodiment of the present invention provides a kind of base station, comprising:
Determination module, for determining definite strategy of the quantization granularities of covariance matrix element;
Sending module, sends to subscriber equipment for definite strategy that described determination module is determined, so that subscriber equipment feeds back the element after quantification in covariance matrix according to described quantization granularities to network side;
Wherein, described definite strategy comprises one of following or its combination in any:
For the diagonal entry in described covariance matrix is set the quantization granularities that is less than the lower diagonal entry in described covariance matrix;
For the diagonal entry in described covariance matrix is set the quantization granularities that is less than the upper diagonal entry in described covariance matrix;
For the part diagonal entry in described covariance matrix is set the quantization granularities that is less than the diagonal entry except described part diagonal entry in described covariance matrix.
As shown from the above technical solution, in the embodiment of the present invention, according to the definite feedback cycle of definite strategy or element or quantization granularities to be sent, to network side, feed back the element in covariance matrix.Under guaranteeing that covariance matrix can the prerequisite of effective Feedback, reduced feedback load, improved the efficiency of wireless communication system.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The schematic flow sheet of the information feedback method that Fig. 1 provides for the embodiment of the present invention one;
The schematic flow sheet of the information feedback method that Fig. 2 provides for the embodiment of the present invention two;
The schematic flow sheet of the information feedback method that Fig. 3 provides for the embodiment of the present invention three;
The schematic flow sheet of the information feedback method that Fig. 4 provides for the embodiment of the present invention four;
The schematic flow sheet of the information feedback method that Fig. 5 provides for the embodiment of the present invention five;
The schematic flow sheet of the information feedback method that Fig. 6 provides for the embodiment of the present invention six;
The schematic flow sheet of the information feedback method that Fig. 7 provides for the embodiment of the present invention seven;
The schematic flow sheet of the information feedback method that Fig. 8 provides for the embodiment of the present invention eight;
The schematic flow sheet of the information feedback method that Fig. 9 provides for the embodiment of the present invention nine;
The structural representation of the subscriber equipment that Figure 10 provides for the embodiment of the present invention ten;
The structural representation of the subscriber equipment that Figure 11 provides for the embodiment of the present invention 11;
The structural representation of the subscriber equipment that Figure 12 provides for the embodiment of the present invention 12;
The structural representation of the subscriber equipment that Figure 13 provides for the embodiment of the present invention 13;
The structural representation of the base station that Figure 14 provides for the embodiment of the present invention 14;
The structural representation of the subscriber equipment that Figure 15 provides for the embodiment of the present invention 15;
The structural representation of the base station that Figure 16 provides for the embodiment of the present invention 16;
The structural representation of the subscriber equipment that Figure 17 provides for the embodiment of the present invention 17;
The structural representation of the base station that Figure 18 provides for the embodiment of the present invention 18.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The schematic flow sheet of the information feedback method that Fig. 1 provides for the embodiment of the present invention one.As shown in Figure 1, the present embodiment can comprise the following steps:
Step 101, basis are determined the feedback cycle of element in the definite covariance matrix of strategy;
Step 102, according to this feedback cycle to the element in network side feedback covariance matrix.
The information feedback method that the present embodiment provides for example can apply in mimo system, can also apply to multiuser MIMO (Multi User-MIMO, hereinafter to be referred as: MU-MIMO), in the system such as OFDM, CDMA, following each embodiment all be take mimo system as example, but is not limited to mimo system.
In MIMO technology, network side is used identical running time-frequency resource to provide service for a plurality of UE.In order to improve reasonability, least mean-square error (the Minimum Mean Square Error of link circuit self-adapting, UE pairing, hereinafter to be referred as MMSE) validity of precoding, need UE by the condition feedback of each strip antenna of self to network side, as network side scheduling resource according to one of.Wherein, the situation of each strip antenna for example can represent by the sampled value of the interference signal that receives, or also can represent by the available signal power receiving, or can also represent by other physical quantitys.Following each embodiment all be take the sampled value of the interference signal that receives and is described as example, but the sampled value of the interference signal that is not limited to receive.
UE in the present embodiment and following each embodiment can be the terminal equipment in mimo system, for example: mobile phone, PC (the Person Computer that can access mimo system, hereinafter to be referred as: PC) or personal digital assistant (Personal Digital Assistant, hereinafter to be referred as the terminal equipment such as PDA).Network side can be the network equipment in mimo system, for example: base station (or is called universal mobile telecommunications system grounding wireless access network node, e-UTRAN Node, hereinafter to be referred as: eNB) or in network side, can realize the network equipment of resource allocation function.The eNB that network side be take in mimo system in the present embodiment and following each embodiment, as example describes, is still not limited to eNB.
In the present embodiment and following each embodiment, UE for example carries the situation of each strip antenna by covariance matrix, wherein, the covariance matrix that can apply in the present embodiment can comprise interference covariance matrix, and this interference covariance matrix can represent the correlation of the interference signal that each strip antenna receives; Can also comprise channel covariance matrices, this channel covariance matrices can represent the correlation of the useful signal that receives to strip antenna.Following each embodiment all be take interference covariance matrix and is described as example, but is not limited to interference covariance matrix.Correspondingly, the element that the element in following each embodiment all be take in interference covariance matrix describes as example, but is not limited to the element in interference covariance matrix.The element of interference covariance matrix and interference covariance matrix is described in detail the further part at specification, repeats no more herein.Wherein, according to the difference of actual conditions, the physical quantity that represents each antenna condition of UE in covariance matrix can be for example the sampled value of the interference signal that receives, or is the power of the useful signal that receives, or can also be other physical quantitys.
Above-mentioned implementation is only a kind of mode of the information feedback method to providing in the embodiment of the present invention, can't be construed as limiting the scope of protection of present invention.The information feedback method that the embodiment of the present invention provides also can apply to network side and send in the concrete scene of each antenna situation or each channel conditions to UE.During concrete utilization, keep the technical scheme of information feedback method provided by the invention constant, only change the main body of each action executing, this kind of method also should be encompassed in the middle of protection scope of the present invention.
Further, when eNB and UE set up communication link, can between the two, set up unified interface, for eNB and UE, according to identical definite strategy, carry out the transmission of information.The form of setting up interface can be that eNB sends in order to set up the Indication message of interface to UE, the definite strategy using during indication UE feedback information; Also can to eNB feedback interface, set up message by UE, in order to definite strategy notice eNB that self is used; Or can also be that UE follows identical rule of communication with eNB, according to this rule of communication, carry out the transmission of information.Concrete way of realization can be selected according to actual conditions, is not limited to above-mentioned three kinds of modes.Wherein, determine that strategy is as the foundation that element in covariance matrix is determined, can unify the element to be sent of element in covariance matrix, feedback cycle, quantization granularities etc., for example: when the definite strategy between eNB and UE is diagonal entry, UE only comprises diagonal entry in eNB feedack.Definite strategy in the present embodiment is elaborated the further part at specification, is not repeating herein.
In the present embodiment, suppose to set up the communication channel that has L sub-frequency band between eNB and UE, wherein, UE has n strip antenna.When eNB and UE set up communication link, UE is by measuring, calculating, obtain respectively the sampled value of its interference signal receiving on each strip antenna in L sub-frequency band, and bring the interference signal sampled value receiving into covariance computing formula, calculate interference covariance matrix, this interference covariance matrix can represent the correlation of the interference signal that each strip antenna receives.Wherein, the whole interference covariance matrix forming due to the element in interference covariance matrix can represent the correlation of the interference signal that each strip antenna receives, so also the element in this interference covariance matrix is called to interference correlation element.This interference correlation element can be for example the sampled value of interference signal.
For example: for the 1st sub-frequency band, in time period k, what on the n strip antenna of UE, receive to the sampled value of interference signal is: X n=[X n1, X n2..., X nk], by X n=[X n1, X n2..., X nk] bring covariance computing formula: C into ij=cov (X i, X j)=E{[X i-E (X i)] [X j-E (X j)], can obtain the Elements C in interference covariance matrix ij, wherein, X ithe sampled value that represents the interference signal that i root antenna reception arrives, X jthe sampled value that represents the interference signal that j root antenna reception arrives, E (X i) represent X iexpectation, E (X j) represent X jexpectation, cov (X i, X j) expression X iand X jcovariance, cov (X i, X j) physical significance represent the sampled value X of interference signal iwith X jbetween correlation.Wherein, by calculating a plurality of cov (X between n strip antenna i, X j), can be combined into interference covariance matrix, be expressed as:
C = C 11 C 12 C 13 . . . C 1 n C 21 C 22 C 23 . . . C 2 n . . . . . . . . . . . . . . . C n 1 C n 2 C n 3 . . . C nn ,
Interference correlation element in the present embodiment is the element in this interference covariance matrix, and therefore, interference correlation element can be the diagonal entry in this interference covariance matrix, upper diagonal entry, lower diagonal entry and part diagonal entry.As interference element diagonal entry: the C that is this interference covariance matrix 11, C 22..., C nn, or during part diagonal entry, the physical significance of this interference correlation element represents the autocorrelation of the interference signal that receives on the n strip antenna of UE.Wherein, diagonal entry: C 11, C 22..., C nnor diagonal entry is real number, it is the important information of reflection down channel disturbed condition.As interference correlation element upper diagonal entry: the C that is this interference covariance matrix 12, C 13..., C 1n, C 23..., C 2n, C (n-1) n, or be the lower diagonal entry of this interference covariance matrix: C 21..., C n1, C n2..., C n (n-1)time, the physical significance of this interference correlation element represents to receive the cross correlation between interference signal on the n strip antenna of UE.Wherein, upper diagonal entry and lower diagonal entry are plural number, and for diagonal entry or part diagonal, upper diagonal entry or lower diagonal entry are lower to the importance of down channel disturbed condition reflection.Because eNB carries out in the process of resource distribution, the important information of the autocorrelation of the interference signal that antenna reception arrives for distributing as resource, and the cross correlation of interference signal is only as supplementary, and the autocorrelation of interference signal is supplemented and refinement.Therefore,, as the foundation of eNB Resources allocation, the cornerwise importance of the diagonal entry of interference covariance matrix or part is higher than upper diagonal entry or lower cornerwise importance.
Further, when interference correlation element is diagonal entry, interference correlation element is real number.At eNB, carry out in the process of resource distribution, according to the larger diagonal entry of numerical value, carrying out resource divides timing to have higher validity, and carry out resource according to the less diagonal entry of numerical value, divide timing validity poor, therefore, from the angle of importance, the element importance that the element that in diagonal entry, numerical value is larger is less than numerical value is high.
In the present embodiment, the importance corresponding to interference correlation element to eNB Resources allocation, can arrange a plurality of feedback cycles corresponding from interference correlation elements different in interference covariance matrix.There is the interference correlation element of equal importance corresponding to identical feedback cycle.Wherein, feedback cycle represents that UE is to the time interval of eNB feedback interference correlation element, with time representation, is inversely proportional to the importance of interference correlation element.Feedback cycle is less, and interference correlation element is more important, and the load of the interference correlation element of feedback is larger; Feedback cycle is larger, and interference correlation element is more inessential, and the load of the interference correlation element of feedback is less.For example: when feedback cycle is 0.5 second, UE sent an interference correlation element every 0.5 second to eNB; When feedback cycle is 0.1 second, UE sent an interference correlation element every 0.1 second to eNB.It should be noted that, UE can dynamically adjust feedback cycle according to actual conditions.
In the present embodiment, determine that strategy is as the foundation of determining the feedback cycle of each interference correlation element in interference covariance matrix, for interference correlation element is set corresponding feedback cycle, UE can this determine the feedback cycle of definite each interference correlation element of strategy.Wherein, determine that strategy can arrange for UE; Also after can being arranged by eNB, send to UE, so that the feedback cycle that UE arranges according to eNB is to eNB feedback interference correlation element; Can also arrange for rule of communication, so that UE and eNB are according to identical feedback cycle sending and receiving interference correlation element.Arranging while determining strategy, it is foundation to the importance of eNB Resources allocation that UE or eNB still be take interference correlation element.Particularly, determine strategy can be set in following three kinds of forms one of or combination in any:
The first form, for the diagonal entry in interference covariance matrix is for example set less feedback cycle: 0.1 second, and be that lower diagonal entry in this interference covariance matrix is for example set larger feedback cycle: 0.5 second, when UE is when determining that feedback cycle that strategy is set is to eNB feedback interference correlation element, with less feedback cycle, when feeding back diagonal entry, eNB can guarantee the validity of the diagonal entry that importance is higher, the load in the time of can reducing feedback information with larger feedback cycle when eNB feeds back lower diagonal entry.
The second form, for the diagonal entry in interference covariance matrix is for example set less feedback cycle: 0.1 second, and be that upper diagonal entry in this interference covariance matrix is for example set larger feedback cycle: 0.5 second, when UE is when determining that feedback cycle that strategy is set is to eNB feedback interference correlation element, with less feedback cycle, can guarantee the validity of the diagonal entry that importance is higher during to eNB feedback diagonal entry, the load with larger feedback cycle to feedback information can be reduced during diagonal entry in eNB feedback time.
The third form, for the part diagonal entry in interference covariance matrix is for example set less feedback cycle: 0.1 second, and for remaining diagonal entry is for example set larger feedback cycle: 0.5 second, when UE is when determining that feedback cycle that strategy is set is to eNB feedback interference correlation element, with less feedback cycle, can guarantee the validity of the part diagonal entry that importance is higher during to eNB feedback fraction diagonal, the load in the time of feedback information can being reduced with larger feedback cycle during to eNB feedback remainder diagonal entry.
Determine that tactful forms can embody different interference correlation element in the interference covariance matrix importance to eNB Resources allocation for above-mentioned three kinds.Wherein, in the third form, can from diagonal entry, select the part diagonal entry that importance is higher by following three kinds of modes, and be that this part diagonal entry is set less feedback cycle.
First kind of way, sets a threshold value for comparing with diagonal entry, and because interference covariance matrix is for gripping altogether matrix, the diagonal entry in interference covariance matrix is all real number, therefore, this threshold value be also real number for example: 50.When diagonal entry and this threshold value compare, the part diagonal entry importance that is greater than this threshold value is higher, is that this part diagonal entry is for example set less feedback cycle: 0.1 second; When diagonal entry and this threshold value compare, the part diagonal entry importance that is less than or equal to this threshold value is lower, is that this part diagonal entry is for example set larger feedback cycle: 0.5 second.
Further, can also set a plurality of threshold values, for example: the first threshold value is: 60, the second threshold value is 30, when setting feedback cycle for diagonal entry, first use the first threshold value and diagonal entry to compare, for being greater than first's diagonal entry of the first threshold value, minimum feedback cycle is set for example: 0.1 second, then use the second threshold value Yu Chu first diagonal entry diagonal entry in addition to compare, for being for example greater than the less feedback cycle of the second portion diagonal entry setting of the second threshold value: 0.3 second, diagonal entry beyond last Wei Chu first's diagonal entry and second portion diagonal entry is for example set larger feedback cycle: 0.5 second.Wherein, while also comprising the 3rd threshold value, the 4th threshold value and more multi-door limit value in above-mentioned example, use the 3rd threshold value Yu Chu first's diagonal entry and second portion diagonal entry diagonal entry in addition to compare, for being greater than the diagonal entry of the 3rd thresholding, for example set larger feedback cycle: 0.8, according to follow-up threshold value, be that part diagonal entry is set the mode of feedback cycle the rest may be inferred.
The second way, similar to upper a kind of mode, still for for the threshold value that compares with diagonal entry for example setting one: 50, use diagonal entry and this threshold value to compare, the diagonal entry importance that is greater than or equal to this threshold value is higher, is that this part diagonal entry is for example set less feedback cycle: 0.1 second; When diagonal entry and this threshold value compare, the diagonal entry importance that is less than this threshold value is lower, is that this part diagonal entry is for example set larger feedback cycle: 0.5 second.
Further, similar to upper a kind of mode, can also set a plurality of threshold values, compare with upper a kind of mode, in first kind of way, for being greater than the diagonal entry of threshold value, set less feedback cycle, and for being greater than or equal to the part diagonal entry of threshold value, set less feedback cycle in the second way, concrete establishing method is identical, repeats no more herein.
The third mode, set an element number M, diagonal entry in interference covariance matrix is compared mutually, and by order from big to small, diagonal entry is sorted, for front M larger diagonal entry for example set less feedback cycle: 0.1 second, for the diagonal entry except a front M diagonal entry is for example set larger feedback cycle: 0.5 second.
Further, can also set a plurality of element number M, for example: the first element number M is 6, the second element number M is 5, when setting feedback cycle for diagonal entry, first the diagonal entry in interference covariance matrix is compared mutually, and by order from big to small, diagonal entry is sorted, then for front 6 larger diagonal entries, for example set minimum feedback cycle: 0.1 second, afterwards in the diagonal entry front 6 diagonal entries except larger, for larger front 5 diagonal entries are set less feedback cycle for example 0.3 second, finally for the diagonal entry except front 11 larger diagonal entries is for example set larger feedback cycle: 0.5 second.While also comprising element number M, the 4th element number M and more element number in above-mentioned example, in the diagonal entry except the first element number M and a second element number M diagonal entry, for M diagonal entry of larger element number for example set larger feedback cycle: 0.8 second, according to the mode of follow-up element number M setting feedback cycle, the rest may be inferred.
In the present embodiment, after definite strategy has been determined, when UE need to be to eNB feedback interference correlation element, first according to the feedback cycle of determining interference correlation element in the definite interference covariance matrix of strategy, and according to this feedback cycle to eNB feedback interference correlation element, so that eNB can, using the interference correlation element of feedback as with reference to foundation, dispatch resource.
In the present embodiment according to determining that the definite feedback cycle of strategy is to the element in network side feedback interference covariance matrix.Guaranteeing, under the prerequisite of effective feedback interference situation, to have increased the feedback cycle of Partial Elements in interference covariance matrix, reduced feedback load, improved the efficiency of wireless communication system.Concrete, the feedback cycle that for example feedback cycle of diagonal entry is less than off diagonal element can, so that the feedback cycle of the lower off diagonal element of importance increases, reduce the content of feedback.And because diagonal entry is generally real number, so few half left and right of the content ratio complex of feedback, and off diagonal element is generally plural number, feedback content is more, therefore make the feedback cycle of off diagonal element larger, and the feedback cycle of diagonal entry compared with I effectively to feed back whole covariance matrix, can also significantly reduce the load of feedback, improve the efficiency of communication system.
The schematic flow sheet of the information feedback method that Fig. 2 provides for the embodiment of the present invention two, it is basis that the present embodiment be take the information feedback method that above-described embodiment one provides, further increase element to be sent in interference covariance matrix is determined, and the flow process of feedback.As shown in Figure 2, the present embodiment can comprise the following steps:
The interference signal that step 201, UE receive according to each strip antenna is calculated interference covariance matrix.
When eNB and UE set up communication link, eNB sends interactive information by L sub-frequency band to each strip antenna of UE, in order to set up and UE between communication channel.UE is by measuring, calculating, obtain respectively the sampled value of its interference signal receiving on each strip antenna in L sub-frequency band, and bring the sampled value of the interference signal receiving into covariance computing formula, calculate interference covariance matrix, the acquisition of interference covariance matrix for example can be referring to embodiments of the invention one.
In the present embodiment, according to the importance to eNB Resources allocation, the interference correlation element in interference covariance matrix is divided into: diagonal entry, upper diagonal entry, lower diagonal entry and part diagonal entry.The importance of various types of interference correlation elements has been described in detail in above-described embodiment one, repeats no more herein.
Step 202, determine element to be sent in interference covariance matrix.
Wherein, element to be sent is the interference correlation element that UE need to feed back to eNB, can be the Partial Elements in interference covariance matrix, can be also all elements in interference covariance matrix.Particularly, element to be sent can be for several below:
The first, the diagonal entry in interference covariance matrix;
The second, the diagonal entry in interference covariance matrix and upper diagonal entry;
The third, the diagonal entry in interference covariance matrix and lower diagonal entry;
The 4th kind, the part diagonal entry in interference covariance matrix.
In the present embodiment, when UE calculates after interference covariance matrix, UE can adopt according to the indication of eNB or according to the regulation of rule of communication or comprehensive modes such as ability, demand, offered load ability of self, determines that a kind of in above-mentioned Four types is element to be sent from interference covariance matrix.
It should be noted that, interference covariance matrix is for gripping altogether symmetrical matrix, the diagonal entry of interference covariance matrix is real number, and upper diagonal entry and lower diagonal entry are plural number, and upper diagonal entry and lower diagonal entry be take diagonal entry and gripped altogether each other symmetry as axle.Therefore, when eNB receives diagonal entry and the upper diagonal entry of the interference covariance matrix kind of UE feedback, or while being the diagonal entry of interference covariance matrix kind and lower diagonal entry, in utilization, diagonal entry and lower diagonal entry grips symmetry altogether, eNB can calculate all elements in interference covariance matrix, has guaranteed the validity of UE feedback information.
Further, when UE determines that the part diagonal entry of interference covariance matrix is element to be sent, UE can determine the part diagonal entry in interference covariance matrix by following three kinds of modes:
First kind of way, for the threshold value that compares with diagonal entry for example set one: 50, this threshold value has been described in detail in above-described embodiment one, repeats no more herein.In determining interference covariance matrix during element to be sent, use diagonal entry and this threshold value in interference covariance matrix to compare, the part diagonal entry that is greater than this threshold value is defined as to element to be sent, and the part diagonal entry that is less than or equal to this threshold value does not send.
Further, can also set a plurality of threshold values, for example: the first threshold value is 50, the second threshold value is 30, in determining interference covariance matrix during element to be sent, first use the diagonal entry of the first threshold value and interference covariance matrix to compare, the first's diagonal entry that is greater than the first threshold value is defined as to first's element to be sent, then use the second threshold value Yu Chu first diagonal entry diagonal entry in addition to compare, the second portion diagonal entry that is greater than the second thresholding is defined as to second portion element to be sent, diagonal entry except first's diagonal entry and second portion diagonal entry does not send.Wherein, while also comprising the 3rd threshold value, the 4th threshold value and more multi-door limit value in above-mentioned example, use the 3rd threshold value Yu Chu first's diagonal entry and second portion diagonal entry diagonal entry in addition to compare, the third part diagonal entry that is greater than the 3rd thresholding is defined as to third part element to be sent, and the rest may be inferred according to follow-up threshold value, to determine the mode of element to be sent.
The second way, similar to upper a kind of mode, still for for the threshold value that compares with diagonal entry for example setting one: 50, in determining interference covariance matrix during element to be sent, use diagonal entry and this threshold value in interference covariance matrix to compare, the part diagonal entry that is greater than or equal to this threshold value is defined as to element to be sent, and the part diagonal entry that is less than this threshold value does not send.
Further, similar to upper a kind of mode, can also set a plurality of threshold values, compare with upper a kind of mode, in first kind of way, the diagonal entry that is greater than threshold value is defined as to element to be sent, and in the second way, the part diagonal entry that is greater than or equal to threshold value being defined as to element to be sent, concrete establishing method is identical, repeats no more herein.
The third mode, set an element number M, in determining interference covariance matrix during element to be sent, diagonal entry in interference covariance matrix is compared mutually, and by order from big to small, diagonal entry is sorted, to be that front M larger diagonal entry is defined as element to be sent, the diagonal entry except M larger diagonal entry send.
Further, can also set a plurality of element number M, for example: the first element number M is 6, the second element number M is 5, in determining interference covariance matrix during element to be sent, first the diagonal entry in interference covariance matrix is compared mutually, and by order from big to small, diagonal entry is sorted, then front 6 larger diagonal entries are defined as to first's element to be sent, afterwards in the diagonal entry front 6 diagonal entries except larger, larger front 5 diagonal entries are defined as to second portion element to be sent, finally the diagonal entry except front 11 larger diagonal entries is defined as not carrying out sending.The rest may be inferred according to follow-up element number M, to determine the mode of element to be sent.
Further, when UE determines that the part diagonal entry of interference covariance matrix is element to be sent, because eNB cannot distinguish which antenna is part diagonal information come from, the correlation that represents the interference signal which antenna reception arrives, therefore, may need UE that definite element antenna number corresponding with this element to be sent sent together.Further, UE can also find out other aerial informations corresponding with diagonal entry to be sent from the memory module of self, and this aerial information is sent with together with diagonal entry to be sent, to indicate these diagonal entries of eNB to come from which antenna.
Step 203, basis are determined the feedback cycle of the definite element to be sent of strategy.
Wherein, determine that strategy has been described in detail in above-described embodiment one, repeats no more herein.
According to determining the feedback cycle of setting in strategy, UE determines the corresponding feedback cycle of element to be sent.
Step 204, according to feedback cycle, to eNB, feed back element to be sent.
UE, according to the feedback cycle of determining, feeds back to eNB by element to be sent.
Further, when part diagonal entry that element to be sent is interference covariance matrix, need to eNB, feed back the aerial information that element to be sent is corresponding simultaneously.
In the present embodiment, guaranteeing under the effective prerequisite of feedback interference correlation element, from interference covariance matrix, determine element to be sent, and according to the feedback cycle of determining that strategy is set, to eNB, feed back element to be sent, reduced UE to eNB feedback interference correlation number of elements, reduce feedback load, improved the efficiency of wireless communication system.
It should be noted that, the present embodiment comprises: UE is according to the step of determining the feedback cycle of element in the definite interference covariance matrix of strategy, determine the step of element to be sent in interference covariance matrix with UE, the order of two steps can be exchanged front and back, that is: first UE determines element to be sent in interference covariance matrix, and then UE is according to the feedback cycle of determining element in the definite interference covariance matrix of strategy; Or UE is first according to the feedback cycle of determining element in the definite interference covariance matrix of strategy, and then UE determines element to be sent in interference covariance matrix.Two kinds of modes all should be within protection scope of the present invention, and can not be construed as limiting protection scope of the present invention.
The schematic flow sheet of the information feedback method that Fig. 3 provides for the embodiment of the present invention three, the present embodiment be take information feedback method that above-described embodiment one provides as basis, has further increased the quantization granularities of interference correlation element in interference covariance matrix is carried out to definite flow process.As shown in Figure 3, the present embodiment can comprise the following steps:
It should be noted that the importance corresponding to interference correlation element to eNB Resources allocation can arrange different quantization granularities for different interference correlation elements corresponding.There is the interference correlation element of equal importance corresponding to identical quantization granularities.Wherein, quantization granularities represents to divide the amplitude of interference correlation element importance rate, is inversely proportional to the number of bits of interference correlation element after quantizing.Quantization granularities is less, can divide the importance of more grades, takies bit more, and the load of the interference correlation element after quantification is larger.
Step 301 in the present embodiment is identical with the step 201 of the information feedback method that above-described embodiment two provides, and repeats no more herein.
Step 302, determine the quantization granularities of interference correlation element in interference covariance matrix.
Wherein, in interference covariance matrix, according to interference correlation element being divided into the importance of eNB Resources allocation: diagonal entry, upper diagonal entry, lower diagonal entry and part diagonal entry.The importance of various types of interference correlation elements has been described in detail in above-described embodiment one, repeats no more herein.
In the present embodiment, when UE calculates after interference covariance matrix, UE can adopt according to the indication of eNB or according to the regulation of rule of communication or the comprehensive mode such as ability, demand, offered load ability of self, for the interference correlation element of above-mentioned Four types in interference covariance matrix, set respectively corresponding quantization granularities, specifically comprise following three kinds of forms:
The first form, for the diagonal entry in interference covariance matrix is for example set less quantization granularities: 25, and be that lower diagonal entry in this interference covariance matrix is for example set larger quantization granularities: 50, when UE is during to eNB feedback interference correlation element, with less quantization granularities, to eNB feedback diagonal entry, can guarantee the validity of the diagonal entry that importance is higher, the load in the time of feedback information can being reduced with larger quantization granularities to the lower diagonal entry of eNB feedback.
The second form, for example, for the diagonal entry in interference covariance matrix is set less quantization granularities: 25, and be the larger quantization granularities of upper diagonal entry setting in this interference covariance matrix, for example: 50.When UE is during to eNB feedback interference correlation element, with less quantization granularities, to eNB feedback diagonal entry, can guarantee the validity of the diagonal entry that importance is higher, the load in the time of feedback information can being reduced with larger quantization granularities to diagonal entry in eNB feedback.
The third form, for example, for the part diagonal entry in interference covariance matrix is set less quantization granularities: 25, and be the larger quantization granularities of remaining diagonal entry setting, for example: 50.When UE is during to eNB feedback interference correlation element, with less feedback cycle, to eNB feedback fraction diagonal, can guarantee the validity of the part diagonal entry that importance is higher, the load in the time of feedback information can being reduced with larger feedback cycle to eNB feedback remainder diagonal entry.
Above-mentioned three kinds of forms can embody different interference correlation element in the interference covariance matrix importance to eNB Resources allocation.Wherein, in the third form, can from diagonal entry, select the part diagonal entry that importance is higher by following three kinds of modes, and be that this part diagonal entry is set less quantization granularities.
First kind of way, for the threshold value that compares with diagonal entry for example sets one: 50.The setting of this threshold value has been described in detail in above-described embodiment one, repeats no more herein.When diagonal entry and this threshold value compare, the part diagonal entry importance that is greater than this threshold value is higher, is that this part diagonal entry is for example set less quantization granularities: 25; When diagonal entry and this threshold value compare, the part diagonal entry importance that is less than or equal to this threshold value is lower, is that this part diagonal entry is for example set larger quantization granularities: 50.
Further, can also set a plurality of threshold values, for example: the first threshold value is: 60, the second threshold value is 30, when setting quantization granularities for diagonal entry, first use the first threshold value and diagonal entry to compare, for being greater than first's diagonal entry of the first threshold value, minimum quantization granularities is set for example: 25, then use the second threshold value Yu Chu first diagonal entry diagonal entry in addition to compare, for being for example greater than the less quantization granularities of the second portion diagonal entry setting of the second threshold value: 40, diagonal entry beyond last Wei Chu first's diagonal entry and second portion diagonal entry is for example set larger quantization granularities: 50.Wherein, while also comprising the 3rd threshold value, the 4th threshold value and more multi-door limit value in above-mentioned example, use the 3rd threshold value Yu Chu first's diagonal entry and second portion diagonal entry diagonal entry in addition to compare, for being greater than the diagonal entry of the 3rd thresholding, for example set larger quantization granularities: 50, according to follow-up threshold value, be that part diagonal entry is set the mode of quantization granularities the rest may be inferred.
The second way, similar to upper a kind of mode, still for for the threshold value that compares with diagonal entry for example setting one: 50, use diagonal entry and this threshold value to compare, the diagonal entry importance that is greater than or equal to this threshold value is higher, is that this part diagonal entry is for example set less quantization granularities: 25; When diagonal entry and this threshold value compare, the diagonal entry importance that is less than this threshold value is lower, is that this part diagonal entry is for example set larger quantization granularities: 50.
Further, similar to upper a kind of mode, can also set a plurality of threshold values, compare with upper a kind of mode, in first kind of way, for being greater than the diagonal entry of threshold value, set less quantization granularities, and for being greater than or equal to the part diagonal entry of threshold value, set less quantization granularities in the second way, concrete establishing method is similar, repeats no more herein.
The third mode, set an element number M, diagonal entry in interference covariance matrix is compared mutually, and by order from big to small, diagonal entry is sorted, for front M larger diagonal entry for example set less quantization granularities: 25, for the diagonal entry except a front M diagonal entry is for example set larger quantization granularities: 50.
Further, can also set a plurality of element number M, for example: the first element number M is 6, the second element number M is 5, when setting quantization granularities for diagonal entry, first the diagonal entry in interference covariance matrix is compared mutually, and by order from big to small, diagonal entry is sorted, then for front 6 larger diagonal entries, for example set minimum quantization granularities: 25, afterwards in the diagonal entry front 6 diagonal entries except larger, for larger front 5 diagonal entries are for example set less quantization granularities: 40, finally for the diagonal entry except front 11 larger diagonal entries is for example set larger quantization granularities: 50.While also comprising element number M, the 4th element number M and more element number in above-mentioned example, in the diagonal entry except the first element number M and a second element number M diagonal entry, for M diagonal entry of larger element number for example set larger quantization granularities: 60, according to the mode of follow-up element number M setting quantization granularities, the rest may be inferred.
After quantization granularities corresponding to interference correlation element in interference covariance matrix set, UE determines the quantization granularities of interference correlation element.
The quantization granularities that step 303, basis are determined, quantizes interference correlation element.
UE, according to the quantization granularities of determining, quantizes the interference correlation element in interference covariance matrix.For example: interference correlation element is 100 real numbers, these 100 real numbers are according to being divided into two grades to the importance of eNB Resources allocation, that is: importance is high and low, quantization granularities is the number 100/ importance rate 2=50 of interference correlation element, the interference correlation element after quantification is represented by 1 bit, that is: any one the interference correlation element in 100 interference correlation elements can represent by 0 or 1.Same example, when these 100 real numbers are according to being divided into two grades to the importance of eNB Resources allocation, that is: importance is high, inferior high, inferior low and low, quantization granularities is now 25, the interference correlation element after quantification is represented by 2 bits, that is: any one the interference correlation element in 100 interference correlation elements can represent by 00,01,10 or 11.Therefore, quantization granularities is larger, can divide the importance of less grade, takies bit fewer, and the load of the interference correlation element after quantification is less.
Step 304, basis are determined the feedback cycle of the definite interference correlation element of strategy.
Wherein, determine that strategy has been described in detail in above-described embodiment one, repeats no more herein.
According to determining the feedback cycle of setting in strategy, UE determines the feedback cycle of interference correlation element.
Step 305, according to feedback cycle, to the interference correlation element after eNB feedback quantization.
The quantization granularities that in the present embodiment, basis is determined, interference correlation element is quantized, and according to determining that the definite feedback cycle of strategy is to the interference correlation element after eNB feedback quantization, guaranteeing under the effective prerequisite of feedback interference correlation element, quantization granularities and the feedback cycle of interference correlation element have been increased, reduce the feedback load of UE to eNB feedback interference correlation element, improved the efficiency of wireless communication system.
It should be noted that, the present embodiment comprises: UE is according to the step of determining the feedback cycle of element in the definite interference covariance matrix of strategy, determine the step of the quantization granularities of interference correlation element with UE, the order of two steps can be exchanged front and back, that is: first UE determines the quantization granularities of interference correlation element, and then UE is according to the feedback cycle of determining element in the definite interference covariance matrix of strategy; Or UE is first according to the feedback cycle of determining element in the definite interference covariance matrix of strategy, and then UE determines the quantization granularities of interference correlation element.Two kinds of modes all should be within protection scope of the present invention, and can not be construed as limiting protection scope of the present invention.
The schematic flow sheet of the information feedback method that Fig. 4 provides for the embodiment of the present invention four, the information feedback method that the present embodiment one above-described embodiment one provides is basis, element flow process to be sent in interference covariance matrix will be determined, and the flow process of the quantization granularities of definite interference correlation information is attached in the present embodiment.As shown in Figure 4, the present embodiment can comprise the following steps:
It should be noted that, the present embodiment is the combination of information feedback method that above-described embodiment one to embodiment tri-is provided, and each step in the present embodiment has been described in detail in above-described embodiment one to embodiment tri-, repeats no more herein.
The interference signal that step 401, UE receive according to each strip antenna is calculated interference covariance matrix.
Step 402, determine element to be sent in interference covariance matrix.
Step 403, determine the quantization granularities of interference correlation element in interference covariance matrix.
The quantization granularities that step 404, basis are determined, quantizes interference correlation element.
Step 405, basis are determined the feedback cycle of the definite element to be sent of strategy.
Step 406, according to feedback cycle, to the interference correlation element after eNB feedback quantization.
In the present embodiment by determining element to be sent in interference covariance matrix, and quantization granularities corresponding to element to be sent, and according to determining that the definite feedback cycle of strategy is to the interference covariance element after eNB feedback quantization.Guaranteeing, under the effective prerequisite of interference correlation information of feedback, to have increased quantization granularities and the feedback cycle of interference correlation element, reducing the feedback load of UE to the interference correlation information of eNB feedback, improving the efficiency of wireless communication system.
It should be noted that; the present embodiment comprises: UE is according to the step of determining the feedback cycle of element in the definite interference covariance matrix of strategy; UE determines the step of element to be sent in interference covariance matrix; and UE determines the step of the quantization granularities of interference correlation element; technical scheme after selecting one of them step or any number of step according to combined in any order from three steps all should be within protection scope of the present invention, and can not be construed as limiting protection scope of the present invention.
The schematic flow sheet of the information feedback method that Fig. 5 provides for the embodiment of the present invention five, the present embodiment is elaborated according to the situation of self definite feedback cycle feedback interference correlation element with eNB indication UE.As shown in Figure 5, the present embodiment can comprise the following steps:
Step 501, eNB determine definite strategy of the feedback cycle of interference correlation element in interference covariance matrix.
In the present embodiment, eNB is according to definite strategy of the feedback cycle of interference correlation element in definite interference covariance matrix such as the ability of UE, demand, offered load.Wherein, this definite strategy is elaborated in above-described embodiment one, repeats no more herein.
Step 502, eNB send to UE by definite strategy of determining, so that the feedback cycle that UE indicates according to eNB is to eNB feedback interference correlation element.
When eNB and UE set up interface, eNB is carried at definite strategy of determining in the Indication message of setting up interface, indication UE according to this feedback cycle to eNB feedback interference correlation information.
In the present embodiment, by eNB, definite strategy of determining is sent to UE, make UE according to the feedback cycle of eNB indication to eNB feedback interference correlation element.Guaranteeing, under the prerequisite of feedback element validity, to have increased the feedback cycle of element in interference covariance matrix, reduced feedback load, improved the efficiency of wireless communication system.
The schematic flow sheet of the information feedback method that Fig. 6 provides for the embodiment of the present invention six, the present embodiment with UE according to determining that strategy determines that the situation of element to be sent in interference covariance matrix is elaborated.As shown in Figure 6, the present embodiment can comprise the following steps:
The interference signal that step 601, UE receive according to each strip antenna is calculated interference covariance matrix.
Wherein, the calculating of interference covariance matrix has been described in detail in above-described embodiment one, repeats no more herein.
Step 602, UE are according to determining element to be sent in the definite interference covariance matrix of strategy.
Wherein, determining of element to be sent has been described in detail in above-described embodiment two, can implement with reference to this embodiment, repeats no more herein.In the present embodiment, determine that strategy determines the foundation of element to be sent in interference covariance matrix as UE, can adopt according to the indication of eNB or according to the regulation of rule of communication or comprehensively self modes such as ability, demand, offered load ability arrange.
Step 603, the element to be sent of determining to eNB feedback.
Wherein, when part diagonal entry that element to be sent is interference covariance matrix, need to eNB, feed back the aerial information that element to be sent is corresponding simultaneously.
In the present embodiment, guaranteeing under the effective prerequisite of feedback interference correlation element, from interference covariance matrix, determine element to be sent, to eNB feedback, reduced UE to eNB feedback interference correlation number of elements, reduce feedback load, improved the efficiency of wireless communication system.
The schematic flow sheet of the information feedback method that Fig. 7 provides for the embodiment of the present invention seven, the situation of the element that definite policy feedback that the present embodiment is determined according to self with eNB indication UE is to be sent is elaborated.As shown in Figure 7, the present embodiment can comprise the following steps:
Step 701, eNB determine definite strategy of element to be sent in interference covariance matrix.
In the present embodiment, eNB is according to definite strategy of element to be sent in definite interference covariance matrix such as the ability of UE, demand, offered load.
Wherein, the definite strategy in the present embodiment can, with reference to the definite strategy in above-described embodiment six, repeat no more herein.
Step 702, eNB send to UE by definite strategy of determining, so that UE feeds back element to be sent according to definite strategy of determining to eNB.
When eNB and UE set up interface, eNB is carried at definite strategy of determining in the Indication message of setting up interface, and indication UE feeds back element to be sent according to definite strategy of determining to eNB.
In the present embodiment, guaranteeing, under the effective prerequisite of feedback interference correlation element, by eNB, definite strategy of determining to be sent to UE, make UE to eNB, feed back element to be sent according to definite strategy of determining.Reduce UE to eNB feedback interference correlation number of elements, reduced feedback load, improved the efficiency of wireless communication system.
The schematic flow sheet of the information feedback method that Fig. 8 provides for the embodiment of the present invention eight, the present embodiment with UE according to determining that strategy determines that the quantization granularities situation of interference correlation element in interference covariance matrix is elaborated.As shown in Figure 8, the present embodiment can comprise the following steps:
The interference signal that step 801, UE receive according to each strip antenna is calculated interference covariance matrix.
Wherein, the calculating of interference covariance matrix has been described in detail in above-described embodiment one, repeats no more herein.
Step 802, UE are according to the quantization granularities of determining interference correlation element in the definite interference covariance matrix of strategy.
Wherein, quantization granularities has been described in detail in above-described embodiment three, repeats no more herein.In the present embodiment, determine that strategy determines the foundation of the quantization granularities of interference correlation element in interference covariance matrix as UE, can adopt according to the indication of eNB or according to the regulation of rule of communication or comprehensively self modes such as ability, demand, offered load ability arrange.
The quantization granularities that step 803, basis are determined, quantizes interference correlation element.
Wherein, the method that interference correlation element is quantized has been described in detail in above-described embodiment three, repeats no more herein.
Step 804, to the interference correlation element after eNB feedback quantization.
In the present embodiment, according to the quantization granularities of determining strategy setting, interference correlation element is quantized, and the interference correlation element after quantizing is fed back to eNB, guaranteeing under the effective prerequisite of feedback interference correlation element, increased the quantization granularities of interference correlation element, reduce the feedback load of UE to eNB feedback interference correlation element, improved the efficiency of wireless communication system.
The schematic flow sheet of the information feedback method that Fig. 9 provides for the embodiment of the present invention nine, the present embodiment is elaborated according to the situation of the interference correlation element after self definite quantization granularities feedback quantization with eNB indication UE.As shown in Figure 9, the present embodiment can comprise the following steps:
Step 901, eNB determine definite strategy of the quantization granularities of interference correlation element in interference covariance matrix.
In the present embodiment, eNB is according to definite strategy of the quantization granularities of interference correlation element in definite interference covariance matrix such as the ability of UE, demand, offered load.
Step 902, eNB send to UE by definite strategy of determining so that UE according to the quantization granularities of eNB indication to the interference correlation element after eNB feedback quantization.
When eNB and UE set up interface, eNB is carried at definite strategy of determining in the Indication message of setting up interface, indication UE according to definite quantization granularities to the interference correlation information after eNB feedback quantization.
In the present embodiment, by eNB, definite strategy of determining is sent to UE, make UE according to the quantization granularities of eNB indication to the interference correlation element after eNB feedback quantization, guaranteeing under the effective prerequisite of feedback interference correlation element, increased the quantization granularities of interference correlation element, reduce the feedback load of UE to eNB feedback interference correlation element, improved the efficiency of wireless communication system.
The structural representation of the subscriber equipment that Figure 10 provides for the embodiment of the present invention ten, the UE that the present embodiment provides can be used for realizing the flow process of the information feedback method that shown in Fig. 1, the embodiment of the present invention provides.As shown in figure 10, the UE of the present embodiment can comprise: the first determination module 11 and the first feedback module 12.Wherein, the first determination module 11 is for determining the feedback cycle of interference covariance matrix interference correlation element according to definite strategy; The first feedback module 12 is for the interference correlation element to eNB feedback interference covariance matrix according to the definite feedback cycle of the first determination module 11.
The UE of the present embodiment for example can also comprise computing module, for the interference signal receiving from each strip antenna according to UE, calculates interference covariance matrix.And the first interference correlation element in feedback module 12 covariance matrix that is further used for obtaining to eNB feedback computing module according to the definite feedback cycle of the first determination module 11.
In the present embodiment the first feedback module 12 according to the definite feedback cycle of the first determination module 11 to the element in eNB feedback interference covariance matrix.Guaranteeing, under the effective prerequisite of feedback element, to have increased the feedback cycle of element in interference covariance matrix, reduced feedback load, improved the efficiency of wireless communication system.
The structural representation of the subscriber equipment that Figure 11 provides for the embodiment of the present invention 11, it is basis that the present embodiment be take the UE that above-described embodiment ten provides, and can be used for realizing the flow process of the information feedback method that shown in Fig. 2, the embodiment of the present invention provides.As shown in figure 11, the UE of the present embodiment also comprises: the second determination module 13 is for determining interference covariance matrix element to be sent.
Further, the first feedback module 12 in the present embodiment comprises: the first feedback unit 121 is for feeding back the definite covariance matrix element to be sent of the second determination module 13 according to the definite feedback cycle of the first determination module 11 to network side.
In the present embodiment, can after the definite feedback cycle of the first determination module 11, notify the second determination module 13 to determine element to be sent, reinform afterwards the first feedback module 12 and feed back; Also can after the definite element to be sent of the second determination module 13, notify the first determination module 11 to determine feedback cycle, notify the first feedback module 12 to feed back afterwards; Also can be that the first determination module 11 and the second determination module 13 notify respectively the first feedback module 12, the first feedback modules 12 to feed back according to the notice of the first determination module 11 and the second determination module 13.
In the present embodiment, guaranteeing under the effective prerequisite of feedback interference correlation element, the second determination module 13 is determined element to be sent from interference covariance matrix, the definite feedback cycle of the first determination module 11, reduced UE to eNB feedback interference correlation number of elements, reduce feedback load, improved the efficiency of wireless communication system.
The structural representation of the subscriber equipment that Figure 12 provides for the embodiment of the present invention 12, it is basis that the present embodiment be take the UE that above-described embodiment ten provides, and can be used for realizing the flow process of the information feedback method that shown in Fig. 3, the embodiment of the present invention provides.As shown in figure 12, the UE of the present embodiment also comprises: the 3rd determination module 14 is for determining the quantization granularities of interference covariance matrix interference correlation element.
Further, the first feedback module 12 also comprises: the second feedback unit 122 is for the element after quantizing according to the definite quantization granularities of the 3rd determination module 14 to network side feedback covariance matrix according to the definite feedback cycle of the first determination module 11.
When the UE of the present embodiment works, the interference signal that UE receives according to each strip antenna calculates interference covariance matrix.Then, the 3rd determination module 14 is determined the quantization granularities of interference correlation element in interference covariance matrix, then, the first determination module 11 is according to the feedback cycle of determining interference correlation element in the definite interference covariance matrix of strategy, finally, the second feedback unit 122 in the first feedback module 12 feeds back the interference correlation element after quantizing according to the definite quantization granularities of the 3rd determination module 14 according to the definite feedback cycle of the first determination module 11 to eNB.
With reference to embodiment 11, in the present embodiment, the annexation of the 3rd determination module 14, the first determination module 11 and the first feedback module 12 can be for notifying the first determination module 11 after the definite quantization granularities of the 3rd determination module 14, the first determination module 11 is determined after feedback cycle, notifies the first feedback module 12; Also can, for notifying the 3rd determination module 14, the three determination modules 14 to determine after quantization granularities after the definite feedback cycle of the first determination module 11, notify the first feedback module 12; Can also be that the 3rd determination module 14 and the first determination module 11 are notified respectively the first feedback module 12.
In the present embodiment, the 3rd determination module 14 is according to the quantization granularities of determining, interference correlation element is quantized, the definite feedback cycle of the first determination module 11, according to feedback cycle to the interference correlation element after eNB feedback quantization, guaranteeing under the effective prerequisite of feedback interference correlation element, increase quantization granularities and the feedback cycle of interference correlation element, reduced the feedback load of UE to eNB feedback interference correlation element, improved the efficiency of wireless communication system.
The structural representation of the subscriber equipment that Figure 13 provides for the embodiment of the present invention 13, it is basis that the present embodiment be take the UE that above-described embodiment ten provides, and can be used for realizing the flow process of the information feedback method that shown in Fig. 4, the embodiment of the present invention provides.As shown in figure 13, the UE of the present embodiment can also comprise: the second determination module 13 and the 3rd determination module 14.Wherein, the second determination module 13 is for determining interference covariance matrix element to be sent; The 3rd determination module 14 is for determining the quantization granularities of interference covariance matrix interference correlation element.
Further, the first feedback module 12 specifically for according to the definite feedback cycle of the first determination module 11 to the element to be sent after quantizing in eNB feedback interference covariance matrix.
Known with reference to aforementioned two embodiment, in the present embodiment, the connected mode of the first determination module 11, the second determination module 13 and the 3rd determination module 14 and the first feedback module 12 also has multiplely, does not repeat them here.
In the present embodiment, by the first determination module 11, determine that feedback cycle, the second determination module 13 determine that element to be sent in interference covariance matrix, the 3rd determination module 14 determine quantization granularities, make the first feedback module 12 can be according to feedback cycle to the element to be sent after eNB feedback quantization.Guaranteeing, under the effective prerequisite of interference correlation information of feedback, to have increased quantization granularities and the feedback cycle of interference correlation element, reducing the feedback load of UE to the interference correlation information of eNB feedback, improving the efficiency of wireless communication system.
The structural representation of the base station that Figure 14 provides for the embodiment of the present invention 14, the eNB that the present embodiment provides can be used for realizing the flow process of the information feedback method that shown in Fig. 5, the embodiment of the present invention provides.As shown in figure 14, the present embodiment eNB can comprise: determination module 21 and sending module 22.Wherein, determination module 21 is for determining definite strategy of the feedback cycle of interference covariance matrix interference correlation element; Sending module 22 sends to UE for definite strategies that determination module 21 is determined so that UE according to this feedback cycle to the element in eNB feedback interference covariance matrix.
When the eNB of the present embodiment works, first determination module 21 is determined definite strategy of the feedback cycle of interference correlation element in interference covariance matrix, definite strategies that sending module 22 is determined determination module 21 send to UE so that UE according to the feedback cycle of eNB indication to the element in eNB feedback interference covariance matrix.
Definite strategies of by sending module 22, determination module 21 being determined in the present embodiment send to UE, make UE according to the feedback cycle of eNB indication to eNB feedback interference correlation element.Guaranteeing, under the prerequisite of feedback element validity, to have increased the feedback cycle of element in interference covariance matrix, reduced feedback load, improved the efficiency of wireless communication system.
The structural representation of the subscriber equipment that Figure 15 provides for the embodiment of the present invention 15, the UE that the present embodiment provides can be used for realizing the flow process of the information feedback method that shown in Fig. 6, the embodiment of the present invention provides.As shown in figure 15, the present embodiment UE can comprise: determination module 31 and feedback module 32.Wherein, determination module 31 is for determining interference covariance matrix element to be sent according to definite strategy; Feedback module 32 is for feeding back the definite interference covariance matrix element to be sent of determination module 31 to eNB.
When the UE of the present embodiment works, the interference signal that first UE receives according to each strip antenna calculates interference covariance matrix.Then, determination module 31 bases are determined element to be sent in the definite interference covariance matrix of strategy, last, and feedback module 32 feeds back element to be sent in the definite interference covariance matrix of determination module 31 to eNB.
In the present embodiment, guaranteeing under the effective prerequisite of feedback interference correlation element, determination module 31 is determined element to be sent from interference covariance matrix, by feedback module 32, to eNB, feed back, reduced UE to eNB feedback interference correlation number of elements, reduce feedback load, improved the efficiency of wireless communication system.
The structural representation of the base station that Figure 16 provides for the embodiment of the present invention 16, the eNB that the present embodiment provides can be used for realizing the flow process of the information feedback method that shown in Fig. 7, the embodiment of the present invention provides.As shown in figure 16, the present embodiment eNB can comprise: determination module 41 and sending module 42.Wherein, determination module 41 is for determining definite strategy of the element that interference covariance matrix is to be sent; Sending module 42 sends to UE for definite strategies that determination module 41 is determined, so that definite strategy that UE determines according to determination module 41 is to element to be sent in eNB feedback interference covariance matrix.
When the eNB of the present embodiment works, first determination module 41 is determined definite strategy of element to be sent in interference covariance matrix, then, definite strategies that sending module 42 is determined determination module 41 send to UE, so that definite strategy that UE determines according to determination module 41 is to element to be sent in eNB feedback interference covariance matrix.
In the present embodiment, guaranteeing under the effective prerequisite of feedback interference correlation element, definite strategy of determination module 41 being determined by sending module 42 sends to UE, makes UE to eNB, feed back element to be sent according to definite strategy of determining.Reduce UE to eNB feedback interference correlation number of elements, reduced feedback load, improved the efficiency of wireless communication system.
The structural representation of the subscriber equipment that Figure 17 provides for the embodiment of the present invention 17, the UE that the present embodiment provides can be used for realizing the flow process of the information feedback method that the embodiment of the present invention shown in Fig. 8 provides.As shown in figure 17, the present embodiment UE can comprise: determination module 51 and feedback module 52.Wherein, determination module 51 is for determining the quantization granularities of interference covariance matrix interference correlation element according to definite strategy; Feedback module 52 is for the element after quantizing to eNB feedback interference covariance matrix according to the quantization granularities of determination module 51.
During the present embodiment UE work, the interference signal that UE receives according to each strip antenna calculates interference covariance matrix.Then, determination module 51 is according to determining that strategy determines the quantization granularities of interference correlation element in interference covariance matrix, last, and the quantization granularities of feedback module 52 determination modules 51 is to the element after quantizing in eNB feedback interference covariance matrix.
In the present embodiment, according to determination module 51, according to definite strategy, go fixed quantization granularities to quantize interference correlation element, and by feedback module 52, the interference correlation element after quantizing is fed back to eNB, guaranteeing under the effective prerequisite of feedback interference correlation element, increased the quantization granularities of interference correlation element, reduce the feedback load of UE to eNB feedback interference correlation element, improved the efficiency of wireless communication system.
The structural representation of the base station that Figure 18 provides for the embodiment of the present invention 18, the eNB that the present embodiment provides can be used for realizing the flow process of the information feedback method that the embodiment of the present invention shown in Fig. 9 provides.As shown in figure 18, the present embodiment eNB can comprise: determination module 61 and sending module 62.Wherein, determination module 61 is for determining definite strategy of the quantization granularities of interference covariance matrix interference correlation element; Sending module 62 sends to UE for definite strategy that determination module 61 is determined, so that this quantization granularities of UE is fed back the element after quantification in covariance matrix to eNB.
When the eNB of the present embodiment works, first determination module 61 is determined the quantization granularities of interference correlation element in interference covariance matrix, afterwards, sending module 62 sends to UE by the definite quantization granularities of determination module 61, so that UE feeds back the element after quantification in covariance matrix according to the quantization granularities of eNB indication to eNB.
In the present embodiment, by sending module 62, the definite quantization granularities of determination module 61 is sent to UE, make UE according to definite quantization granularities to the interference correlation element after eNB feedback quantization, guaranteeing under the effective prerequisite of feedback interference correlation element, increased the quantization granularities of interference correlation element, reduce the feedback load of UE to eNB feedback interference correlation element, improved the efficiency of wireless communication system.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can complete by the relevant hardware of program command, aforesaid program can be stored in a computer read/write memory medium, this program, when carrying out, is carried out the step that comprises said method embodiment; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CDs.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.

Claims (23)

1. an information feedback method, is characterized in that, described method comprises:
According to determining strategy, determine the feedback cycle of element in covariance matrix;
According to described feedback cycle, to network side, feed back the element in described covariance matrix;
Wherein, described definite strategy comprises one of following or its combination in any:
For the diagonal entry in described covariance matrix is set the feedback cycle that is less than the lower diagonal entry in described covariance matrix;
For the diagonal entry in described covariance matrix is set the feedback cycle that is less than the upper diagonal entry in described covariance matrix;
For the part diagonal entry in described covariance matrix is set the feedback cycle that is less than the diagonal entry except described part diagonal entry in described covariance matrix.
2. method according to claim 1, is characterized in that, describedly for the part diagonal entry in described covariance matrix, sets the feedback cycle that is less than the diagonal entry except described part diagonal entry in described covariance matrix, comprising:
According to the threshold value of setting, for being greater than the diagonal entry of described threshold value in described covariance matrix, set the feedback cycle that is less than the diagonal entry that is less than or equal to described threshold value in described covariance matrix; Or
According to the threshold value of setting, for being greater than or equal to the diagonal entry of described threshold value in described covariance matrix, set the feedback cycle that is less than the diagonal entry that is less than described threshold value in described covariance matrix; Or
According to the element number M setting, for M diagonal entry setting from big to small in described covariance matrix is less than the feedback cycle of the diagonal entry except M diagonal entry in described covariance matrix.
3. method according to claim 1, is characterized in that, described according to described feedback cycle, to network side, feed back the element in described covariance matrix before, described method also comprises:
Determine element to be sent in described covariance matrix; And
According to described feedback cycle, to network side, feed back the element in described covariance matrix, comprising:
According to described feedback cycle, to network side, feed back element to be sent in described covariance matrix.
4. method according to claim 3, is characterized in that, describedly determines element to be sent in described covariance matrix, comprises one of following:
Diagonal entry in described covariance matrix is defined as to element to be sent;
Diagonal entry in described covariance matrix and upper diagonal entry are defined as to element to be sent;
Diagonal entry in described covariance matrix and lower diagonal entry are defined as to element to be sent;
Part diagonal entry in described covariance matrix is defined as to element to be sent.
5. method according to claim 4, is characterized in that, described part diagonal entry in described covariance matrix is defined as to element to be sent, comprising:
Threshold value according to setting, is defined as element to be sent by the diagonal entry that is greater than described threshold value in described covariance matrix; Or
Threshold value according to setting, is defined as element to be sent by the diagonal entry that is greater than or equal to described threshold value in described covariance matrix; Or
According to the element number M setting, M diagonal entry from big to small in described covariance matrix is defined as to element to be sent; And
Describedly according to described feedback cycle, to network side, feed back element to be sent in described covariance matrix, comprising:
According to described feedback cycle, to network side, feed back element to be sent in described covariance matrix and aerial information corresponding to described element to be sent.
6. method according to claim 1, is characterized in that, described according to described feedback cycle, to network side, feed back the element in described covariance matrix before, described method also comprises:
Determine the quantization granularities of element in described covariance matrix; And
According to described feedback cycle, to network side, feed back the element in described covariance matrix, comprising:
According to described feedback cycle, to network side, feed back the element after quantification in described covariance matrix.
7. method according to claim 6, is characterized in that, the described quantization granularities of determining element in described covariance matrix comprises one of following or its combination in any:
For the diagonal entry in described covariance matrix is set the quantization granularities that is less than the lower diagonal entry in described covariance matrix;
For the diagonal entry in described covariance matrix is set the quantization granularities that is less than the upper diagonal entry in described covariance matrix;
For the part diagonal entry in described covariance matrix is set the quantization granularities that is less than the diagonal entry except described part diagonal entry in described covariance matrix.
8. method according to claim 7, is characterized in that, describedly for the part diagonal entry in described covariance matrix, sets the quantization granularities that is less than the diagonal entry except described part diagonal entry in described covariance matrix, comprising:
According to the threshold value of setting, for being greater than the diagonal entry of described threshold value in described covariance matrix, set the quantization granularities that is less than the diagonal entry that is less than or equal to described threshold value in described covariance matrix; Or
According to the threshold value of setting, for being greater than or equal to the diagonal entry of described threshold value in described covariance matrix, set the quantization granularities that is less than the diagonal entry that is less than described threshold value in described covariance matrix; Or
According to the element number M setting, for M diagonal entry setting from big to small in described covariance matrix is less than the quantization granularities of the diagonal entry except M diagonal entry in described covariance matrix.
9. an information feedback method, is characterized in that, described method comprises:
Determine definite strategy of the feedback cycle of element in covariance matrix;
Described definite definite strategy is sent to subscriber equipment, so that subscriber equipment feeds back the element in covariance matrix according to described feedback cycle to network side;
Wherein, described definite strategy comprises one of following or its combination in any:
For the diagonal entry in described covariance matrix is set the feedback cycle that is less than the lower diagonal entry in described covariance matrix;
For the diagonal entry in described covariance matrix is set the feedback cycle that is less than the upper diagonal entry in described covariance matrix;
For the part diagonal entry in described covariance matrix is set the feedback cycle that is less than the diagonal entry except described part diagonal entry in described covariance matrix.
10. an information feedback method, is characterized in that, described method comprises:
According to determining strategy, determine element to be sent in covariance matrix;
To network side, feed back element to be sent in described covariance matrix;
Wherein, described definite strategy comprises one of following or its combination in any:
Diagonal entry in described covariance matrix is defined as to element to be sent;
Diagonal entry in described covariance matrix and upper diagonal entry are defined as to element to be sent;
Diagonal entry in described covariance matrix and lower diagonal entry are defined as to element to be sent;
Part diagonal entry in described covariance matrix is defined as to element to be sent.
11. methods according to claim 10, is characterized in that, described part diagonal entry in described covariance matrix are defined as to element to be sent, comprising:
Threshold value according to setting, is defined as element to be sent by the diagonal entry that is greater than described threshold value in described covariance matrix; Or
Threshold value according to setting, is defined as element to be sent by the diagonal entry that is greater than or equal to described threshold value in described covariance matrix; Or
According to the element number M setting, M diagonal entry from big to small in described covariance matrix is defined as to element to be sent; And
Describedly to network side, feed back element to be sent in described covariance matrix, comprising:
To network side, feed back element to be sent in described covariance matrix and aerial information corresponding to described element to be sent.
12. 1 kinds of information feedback methods, is characterized in that, described method comprises:
Determine definite strategy of element to be sent in covariance matrix;
Described definite definite strategy is sent to subscriber equipment, so that subscriber equipment feeds back element to be sent in covariance matrix according to described definite definite strategy to network side;
Wherein, described definite strategy comprises one of following or its combination in any:
Diagonal entry in described covariance matrix is defined as to element to be sent;
Diagonal entry in described covariance matrix and upper diagonal entry are defined as to element to be sent;
Diagonal entry in described covariance matrix and lower diagonal entry are defined as to element to be sent;
Part diagonal entry in described covariance matrix is defined as to element to be sent.
13. 1 kinds of information feedback methods, is characterized in that, described method comprises:
According to determining strategy, determine the quantization granularities of element in covariance matrix;
According to described quantization granularities, to network side, feed back the element after quantification in described covariance matrix;
Wherein,
Described definite strategy comprises one of following or its combination in any:
For the diagonal entry in described covariance matrix is set the quantization granularities that is less than the lower diagonal entry in described covariance matrix;
For the diagonal entry in described covariance matrix is set the quantization granularities that is less than the upper diagonal entry in described covariance matrix;
For the part diagonal entry in described covariance matrix is set the quantization granularities that is less than the diagonal entry except described part diagonal entry in described covariance matrix.
14. methods according to claim 13, is characterized in that, describedly for the part diagonal entry in described covariance matrix, set the quantization granularities that is less than the diagonal entry except described part diagonal entry in described covariance matrix, comprising:
According to the threshold value of setting, for being greater than the diagonal entry of described threshold value in described covariance matrix, set the quantization granularities that is less than the diagonal entry that is less than or equal to described threshold value in described covariance matrix; Or
According to the threshold value of setting, for being greater than or equal to the diagonal entry of described threshold value in described covariance matrix, set the quantization granularities that is less than the diagonal entry that is less than described threshold value in described covariance matrix; Or
According to the element number M setting, for M diagonal entry setting from big to small in described covariance matrix is less than the quantization granularities of the diagonal entry except M diagonal entry in described covariance matrix.
15. 1 kinds of information feedback methods, is characterized in that, described method comprises:
Determine definite strategy of the quantization granularities of element in covariance matrix;
Described definite definite strategy is sent to subscriber equipment, so that subscriber equipment feeds back the element after quantification in covariance matrix according to described quantization granularities to network side;
Wherein, described definite strategy comprises one of following or its combination in any:
For the diagonal entry in described covariance matrix is set the quantization granularities that is less than the lower diagonal entry in described covariance matrix;
For the diagonal entry in described covariance matrix is set the quantization granularities that is less than the upper diagonal entry in described covariance matrix;
For the part diagonal entry in described covariance matrix is set the quantization granularities that is less than the diagonal entry except described part diagonal entry in described covariance matrix.
16. 1 kinds of subscriber equipmenies, is characterized in that, described subscriber equipment comprises:
The first determination module, for determining the feedback cycle of covariance matrix element according to definite strategy;
The first feedback module, for feeding back the element of described covariance matrix according to the definite feedback cycle of described the first determination module to network side;
Wherein, described definite strategy comprises one of following or its combination in any:
For the diagonal entry in described covariance matrix is set the feedback cycle that is less than the lower diagonal entry in described covariance matrix;
For the diagonal entry in described covariance matrix is set the feedback cycle that is less than the upper diagonal entry in described covariance matrix;
For the part diagonal entry in described covariance matrix is set the feedback cycle that is less than the diagonal entry except described part diagonal entry in described covariance matrix.
17. subscriber equipmenies according to claim 16, is characterized in that, described subscriber equipment also comprises:
The second determination module, for determining described covariance matrix element to be sent; And
Described the first feedback module, comprising: the first feedback unit, and for feeding back the definite covariance matrix element to be sent of described the second determination module according to the definite feedback cycle of described the first determination module to network side.
18. according to the subscriber equipment described in claim 16 or 17, it is characterized in that, described subscriber equipment also comprises:
The 3rd determination module, for determining the quantization granularities of described covariance matrix element; And
Described the first feedback module, also comprises: the second feedback unit, and for feeding back the element after described covariance matrix quantizes according to the definite quantization granularities of described the 3rd determination module according to the definite feedback cycle of described the first determination module to network side.
19. 1 kinds of base stations, is characterized in that, described base station comprises:
Determination module, for determining definite strategy of the feedback cycle of covariance matrix element;
Sending module, sends to subscriber equipment for definite strategy that described determination module is determined, so that subscriber equipment feeds back the element in covariance matrix according to described feedback cycle to network side;
Wherein, described definite strategy comprises one of following or its combination in any:
For the diagonal entry in described covariance matrix is set the feedback cycle that is less than the lower diagonal entry in described covariance matrix;
For the diagonal entry in described covariance matrix is set the feedback cycle that is less than the upper diagonal entry in described covariance matrix;
For the part diagonal entry in described covariance matrix is set the feedback cycle that is less than the diagonal entry except described part diagonal entry in described covariance matrix.
20. 1 kinds of subscriber equipmenies, is characterized in that, described subscriber equipment comprises:
Determination module, for determining covariance matrix element to be sent according to definite strategy;
Feedback module, for feeding back the definite covariance matrix of described determination module element to be sent to network side;
Wherein, described definite strategy comprises one of following or its combination in any:
Diagonal entry in described covariance matrix is defined as to element to be sent;
Diagonal entry in described covariance matrix and upper diagonal entry are defined as to element to be sent;
Diagonal entry in described covariance matrix and lower diagonal entry are defined as to element to be sent;
Part diagonal entry in described covariance matrix is defined as to element to be sent.
21. 1 kinds of base stations, is characterized in that, described base station comprises:
Determination module, for determining definite strategy of the element that covariance matrix is to be sent;
Sending module, sends to subscriber equipment for definite strategy that described determination module is determined, so that subscriber equipment feeds back element to be sent in covariance matrix according to described definite definite strategy to network side;
Wherein, described definite strategy comprises one of following or its combination in any:
Diagonal entry in described covariance matrix is defined as to element to be sent;
Diagonal entry in described covariance matrix and upper diagonal entry are defined as to element to be sent;
Diagonal entry in described covariance matrix and lower diagonal entry are defined as to element to be sent;
Part diagonal entry in described covariance matrix is defined as to element to be sent.
22. 1 kinds of subscriber equipmenies, is characterized in that, described subscriber equipment comprises:
Determination module, for determining the quantization granularities of covariance matrix element according to definite strategy;
Feedback module, for feeding back the element after described covariance matrix quantizes according to the definite quantization granularities of described determination module to network side;
Wherein, described definite strategy comprises one of following or its combination in any:
For the diagonal entry in described covariance matrix is set the quantization granularities that is less than the lower diagonal entry in described covariance matrix;
For the diagonal entry in described covariance matrix is set the quantization granularities that is less than the upper diagonal entry in described covariance matrix;
For the part diagonal entry in described covariance matrix is set the quantization granularities that is less than the diagonal entry except described part diagonal entry in described covariance matrix.
23. 1 kinds of base stations, is characterized in that, described base station comprises:
Determination module, for determining definite strategy of the quantization granularities of covariance matrix element;
Sending module, sends to subscriber equipment for definite strategy that described determination module is determined, so that subscriber equipment feeds back the element after quantification in covariance matrix according to described quantization granularities to network side;
Wherein, described definite strategy comprises one of following or its combination in any:
For the diagonal entry in described covariance matrix is set the quantization granularities that is less than the lower diagonal entry in described covariance matrix;
For the diagonal entry in described covariance matrix is set the quantization granularities that is less than the upper diagonal entry in described covariance matrix;
For the part diagonal entry in described covariance matrix is set the quantization granularities that is less than the diagonal entry except described part diagonal entry in described covariance matrix.
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