CN101640656A - Channel quality index feedback method, receiver and transmitter - Google Patents
Channel quality index feedback method, receiver and transmitter Download PDFInfo
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Abstract
The invention discloses a channel quality index feedback method, a receiver and a transmitter. The method comprises that: the transmitter determines a channel quality index feedback mode and index information corresponding to the channel quality index feedback mode according to the movement speed of the receiver, channel environment information and dispatching mode information; the transmitter transmits notification message to the receiver, wherein the notification message carries the index information corresponding to the channel quality index feedback mode and feedback resource information,and the feedback resource information carries uplink resources required when the receiver feeds back channel quality indexes; and the receiver determines the corresponding channel quality index feedback mode according to the index information, and adopts the corresponding channel quality index feedback mode to feed back the channel quality index information on the uplink resources according to thefeedback resource information. Through the technical scheme, the determination of different CQI feedback modes according to communication scenes can be realized, and the dispatching performance of the system can be improved.
Description
Technical field
The present invention relates to the communications field, and especially, relate to a kind of channel quality index feedback method, Receiver And Transmitter.
Background technology
In the communications field, quality index of a channel (Channel Quality Indication abbreviates CQI as) be in the communication system receiver to the information of transmitter feedback channel situation.
Transmitter corresponds to certain transmission block size, coded system and modulation system with the CQI information of receiver feedback, and is that receiver carries out resource allocation and scheduling according to CQI information on this basis.Therefore, CQI information the channel that can reflect really degree and when feeding back shared uplink overhead can produce bigger influence to systematic function.
Yet, in fact, the resource that the really degree of the channel that CQI information is reflected and feedback are consumed is a contradiction, reflect channel if desired as far as possible truly, then can take the unity feedback strategy, that is, feed back the channel quality information of each scheduling unit on the whole working band, but this will produce expense relatively.For example, for the communication system of a 10M bandwidth, OFDM (Orthogonal Frequency DivisionMultiplexing abbreviates OFDM as) technology is divided into 600 subcarriers with whole frequency band, per 12 subcarriers are as a Resource Block, totally 50 Resource Block; Each Resource Block then needs 50 CQI values to reflect the channel quality of each Resource Block on the whole frequency band as a scheduling unit.
At present, proposed several different methods, mainly comprised following several at the feedback of CQI:
1, average CQI feedback: an average CQI value feeding back whole transmission bandwidth;
2, CQI feeds back fully: the CQI value of feeding back all Resource Block in the whole bandwidth;
3, the CQI of M the strongest Resource Block feedback: the CQI value of feed back M maximum with and the positional information of place Resource Block, the average CQI value of other Resource Block;
4, the CQI average of M the strongest Resource Block feedback: feed back M maximum the CQI value mean value with and the positional information of place Resource Block, the average CQI value of other Resource Block;
5, the CQI feedback of the strongest M the Resource Block of grouping: the mode that circulates is also adopted in grouping, reports the CQI of M the strongest in one group Resource Block at every turn;
6, based on the CQI of thresholding feedback: the CQI value in the full range band of measuring based on each receiver, calculate the mean value that is included in the interior CQI value of the highest CQI value and CQI thresholding, the positional information of this average CQI value and the CQI value that relates to thereof is fed back to transmitter;
7, differential CQI feedback: the differential CQI value (1-bit) of at every turn feeding back an absolute CQI value and other Resource Block; Wherein, the calculating of differential CQI bit can be divided into the difference information in calculated rate territory and the difference information dual mode of calculating time domain;
8, graduation continuous resource piece CQI feedback: divide some grades with whole transmission bandwidth, comprise the information and the CQI value information of class information, Resource Block in the CQI feedback information;
9, the discontinuous Resource Block CQI feedback of graduation: comprise the bitmap and the CQI value of Resource Block in the CQI feedback information, wherein, bitmap has provided the position with the corresponding Resource Block of CQI value.
In above-mentioned the whole bag of tricks,, method 1 do not carry out the advantage that frequency is selected though to the expense minimum that up link causes, not possessing; Though method 2 can reflect the channel quality status on each Resource Block, and up link has been brought great expense incurred more accurately; Method 3,4,5,6 shortcomings for method 1 and 2 have certain compensation, but, for the stronger channel of frequency domain selectivity, the quality of channel situation may have bigger difference on each Resource Block, therefore, use the identical several channel qualities of CQI value representative to differ bigger Resource Block, can produce than mistake, cause irrational resource allocation, to such an extent as to cause systematic function to descend; Method 7,8,9 is owing to have very high computation complexity, method that therefore neither be desirable.Therefore, need a kind of new CQI feedback system.
Summary of the invention
Consider the problems referred to above and make the present invention, for this reason, main purpose of the present invention is to provide a kind of channel quality index feedback method, Receiver And Transmitter, adopts identical CQI feedback method, the problem that makes systematic function decline in the correlation technique to solve under different communication scenes.
According to an aspect of the present invention, provide a kind of channel quality index feedback method.
Channel quality index feedback method according to the present invention comprises: transmitter is according to translational speed, channel environmental information and the scheduling mode information of receiver, determine the quality index of a channel feedback system and with the corresponding index information of quality index of a channel feedback system; Transmitter sends a notification message to receiver, wherein, carries in the notification message and corresponding index information of quality index of a channel feedback system and feedback resources information, carries receiver required ascending resource when feedback of channel quality indication in the feedback resources information; Receiver is determined corresponding quality index of a channel feedback system according to index information, and adopts corresponding quality index of a channel feedback system feedback of channel quality indication information according to feedback resources information on ascending resource.
In addition, said method further comprises: transmitter is constructed the quality index of a channel value of whole frequency band according to the quality index of a channel information and the index information of feedback, and carries out resource allocation and scheduling according to the quality index of a channel value.
In addition, transmitter is according to translational speed, channel environmental information and the scheduling mode information of receiver, determine quality index of a channel feedback system and with the corresponding index information of the feedback system of quality index of a channel before, further comprise: the index relative of in Receiver And Transmitter, preserving index information, quality index of a channel feedback system and index information and quality index of a channel feedback system respectively in advance, wherein, carry index value in the index information, index value and quality index of a channel feedback system have index relative, and corresponding one by one mutually.
Wherein, transmitter determines that according to index information corresponding quality index of a channel feedback system is specially: transmitter is determined corresponding quality index of a channel feedback system according to index value and index relative.
Wherein, channel environmental information comprises: the quantity that is in the receiver of state of activation in the sub-district; Scheduling mode information comprises: centralized scheduling mode, distributed scheduling mode.
In addition, said method also comprises: set in advance the translational speed of channel environmental information, receiver and the mapping relations of scheduling mode information and feedback system.
Wherein, above-mentioned transmitter is according to translational speed, channel environmental information and the scheduling mode information of receiver, the feedback system of determining quality index of a channel comprises: transmitter is determined the feedback system of quality index of a channel according to translational speed, channel environmental information and the scheduling mode information searching mapping relations of receiver.
Wherein, above-mentioned transmitter is according to translational speed, channel environmental information and the scheduling mode information searching mapping relations of receiver, the feedback system of determining quality index of a channel is specially: the quantity of receiver that is in state of activation in less than predetermined speed threshold value and sub-district in the translational speed of receiver less than the predetermined quantity threshold value, adopt under the situation of centralized scheduling mode, determine to adopt first kind feedback system, wherein first kind feedback system be expense big, postpone big, feedback accurately and based on the quality index of a channel feedback system of continuous resource piece; The quantity of receiver that is in state of activation in less than predetermined speed threshold value and sub-district in the translational speed of receiver less than the predetermined quantity threshold value, adopt under the situation of distributed scheduling mode, determine to adopt the second class feedback system, wherein the second class feedback system be expense big, postpone big, feedback accurately and based on the quality index of a channel feedback system of discrete Resource Block; The quantity of receiver that is in state of activation in greater than predetermined speed threshold value and sub-district in the translational speed of receiver less than the predetermined quantity threshold value, adopt under the situation of centralized scheduling mode, determine to adopt the 3rd class feedback system, wherein, the 3rd class feedback system be expense big, postpone big, feedback accurately and based on the quality index of a channel feedback system of continuous resource piece; The quantity of receiver that is in state of activation in greater than predetermined speed threshold value and sub-district in the translational speed of receiver less than the predetermined quantity threshold value, adopt under the situation of distributed scheduling mode, determine to adopt the 4th class feedback system, wherein, the 4th class feedback system be expense big, postpone big, feedback accurately and based on the quality index of a channel feedback system of discrete Resource Block; The quantity of receiver that is in state of activation in less than predetermined speed threshold value and sub-district in the translational speed of receiver greater than the predetermined quantity threshold value, adopt under the situation of centralized scheduling mode, determine to adopt the 5th class feedback system, wherein, the 5th class feedback system be expense big, postpone big, feedback accurately and based on the quality index of a channel feedback system of continuous resource piece; The quantity of receiver that is in state of activation in less than predetermined speed threshold value and sub-district in the translational speed of receiver greater than the predetermined quantity threshold value, adopt under the situation of distributed scheduling mode, determine to adopt the 6th class feedback system, wherein, the 6th class feedback system be expense big, postpone big, feedback accurately and based on the quality index of a channel feedback system of discrete Resource Block; The quantity of receiver that is in state of activation in greater than predetermined speed threshold value and sub-district in the translational speed of receiver greater than the predetermined quantity threshold value, adopt under the situation of centralized scheduling mode, determine to adopt the 7th class feedback system, wherein, the 7th class feedback system be expense little, postpone little, feedback is rough and based on the quality index of a channel feedback system of continuous resource piece; The quantity of receiver that is in state of activation in greater than predetermined speed threshold value and sub-district in the translational speed of receiver greater than the predetermined quantity threshold value, adopt under the situation of distributed scheduling mode, determine to adopt the 8th class feedback system, wherein, the 8th class feedback system be expense little, postpone little, feedback is rough and based on the quality index of a channel feedback system of discrete Resource Block.
Wherein, the feedback system of above-mentioned quality index of a channel comprises one of following or its combination: average channel quality index feedback system, complete channel performance figure feedback system, the quality index of a channel feedback system of a strongest M Resource Block, the quality index of a channel average feedback system that a strongest M resource is fast, the quality index of a channel feedback system of the strongest M of a grouping Resource Block, quality index of a channel feedback system based on thresholding, differential channel quality index feedback system, graduation continuous resource piece quality index of a channel feedback system, the discontinuous Resource Block quality index of a channel feedback system of classifying, the feedback system of subband poll, feedback system based on discrete cosine transform, wherein, M is the integer greater than zero.
According to a further aspect in the invention, provide a kind of receiver, be used for quality index of a channel is fed back.
The receiver bright according to this law comprises: receiver module, be used to receive notification message from transmitter, wherein, carry in the notification message and corresponding index information of quality index of a channel feedback system and feedback resources information, carry receiver required ascending resource when feedback of channel quality indication in the feedback resources information; Determination module is used for determining corresponding quality index of a channel feedback system according to index information; Feedback module is used for adopting corresponding quality index of a channel feedback system feedback of channel quality indication information according to feedback resources information on ascending resource.
In addition, above-mentioned receiver further comprises: module is set, is used to set in advance the translational speed of channel environmental information, receiver and the mapping relations of scheduling mode information and feedback system.
Wherein, it is one of following that the feedback system of above-mentioned quality index of a channel is at least: average channel quality index feedback system, complete channel performance figure feedback system, the quality index of a channel feedback system of a strongest M Resource Block, the quality index of a channel average feedback system that a strongest M resource is fast, the quality index of a channel feedback system of the strongest M of a grouping Resource Block, quality index of a channel feedback system based on thresholding, differential channel quality index feedback system, graduation continuous resource piece quality index of a channel feedback system, the discontinuous Resource Block quality index of a channel feedback system of classifying, the feedback system of subband poll, feedback system based on discrete cosine transform, wherein, M is the integer greater than zero.
In accordance with a further aspect of the present invention, provide a kind of transmitter, be used for determining employed quality index of a channel feedback system of receiver and the required ascending resource of feedback, and carried out resource allocation according to the quality index of a channel of receiver feedback.
The transmitter bright according to this law comprises: determination module, be used for translational speed, channel environmental information and scheduling mode information according to receiver, determine the quality index of a channel feedback system, with the corresponding index information of quality index of a channel feedback system and receiver required ascending resource when feedback of channel quality indication; Sending module, be used for sending a notification message to receiver, wherein, carry in the notification message and corresponding index information of quality index of a channel feedback system and feedback resources information, carry receiver required ascending resource when feedback of channel quality indication in the feedback resources information; Receiver module is used to receive the quality index of a channel that receiver feeds back; Resource distribution module according to the quality index of a channel information and the index information of feedback, is constructed the quality index of a channel value of whole frequency band, and is carried out resource allocation and scheduling according to the quality index of a channel value.
In addition, above-mentioned transmitter further comprises: module is set, is used to set in advance the translational speed of channel environmental information, receiver and the mapping relations of scheduling mode information and feedback system.
In addition, above-mentioned determination module further comprises: search module, be used for translational speed, channel environmental information and scheduling mode information searching mapping relations according to receiver, determine the feedback system of quality index of a channel.
Wherein, the above-mentioned module of searching specifically is used for: the quantity of receiver that is in state of activation in less than predetermined speed threshold value and sub-district in the translational speed of receiver less than the predetermined quantity threshold value, adopt under the situation of centralized scheduling mode, determine to adopt first kind feedback system, wherein first kind feedback system be expense big, postpone big, feedback accurately and based on the quality index of a channel feedback system of continuous resource piece; The quantity of receiver that is in state of activation in less than predetermined speed threshold value and sub-district in the translational speed of receiver less than the predetermined quantity threshold value, adopt under the situation of distributed scheduling mode, determine to adopt the second class feedback system, wherein the second class feedback system be expense big, postpone big, feedback accurately and based on the quality index of a channel feedback system of discrete Resource Block; The quantity of receiver that is in state of activation in greater than predetermined speed threshold value and sub-district in the translational speed of receiver less than the predetermined quantity threshold value, adopt under the situation of centralized scheduling mode, determine to adopt the 3rd class feedback system, wherein, the 3rd class feedback system be expense big, postpone big, feedback accurately and based on the quality index of a channel feedback system of continuous resource piece; The quantity of receiver that is in state of activation in greater than predetermined speed threshold value and sub-district in the translational speed of receiver less than the predetermined quantity threshold value, adopt under the situation of distributed scheduling mode, determine to adopt the 4th class feedback system, wherein, the 4th class feedback system be expense big, postpone big, feedback accurately and based on the quality index of a channel feedback system of discrete Resource Block; The quantity of receiver that is in state of activation in less than predetermined speed threshold value and sub-district in the translational speed of receiver greater than the predetermined quantity threshold value, adopt under the situation of centralized scheduling mode, determine to adopt the 5th class feedback system, wherein, the 5th class feedback system be expense big, postpone big, feedback accurately and based on the quality index of a channel feedback system of continuous resource piece; The quantity of receiver that is in state of activation in less than predetermined speed threshold value and sub-district in the translational speed of receiver greater than the predetermined quantity threshold value, adopt under the situation of distributed scheduling mode, determine to adopt the 6th class feedback system, wherein, the 6th class feedback system be expense big, postpone big, feedback accurately and based on the quality index of a channel feedback system of discrete Resource Block; The quantity of receiver that is in state of activation in greater than predetermined speed threshold value and sub-district in the translational speed of receiver greater than the predetermined quantity threshold value, adopt under the situation of centralized scheduling mode, determine to adopt the 7th class feedback system, wherein, the 7th class feedback system be expense little, postpone little, feedback is rough and based on the quality index of a channel feedback system of continuous resource piece; The quantity of receiver that is in state of activation in greater than predetermined speed threshold value and sub-district in the translational speed of receiver greater than the predetermined quantity threshold value, adopt under the situation of distributed scheduling mode, determine to adopt the 8th class feedback system, wherein, the 8th class feedback system be expense little, postpone little, feedback is rough and based on the quality index of a channel feedback system of discrete Resource Block.
Wherein, above-mentioned determination module specifically is used for: preserve the feedback system of index information, quality index of a channel and the index relative of index information and feedback system in advance, wherein, index information carries index value, index value and quality index of a channel feedback system have index relative, and corresponding one by one mutually; According to the feedback system and the index relative of quality index of a channel, determine the corresponding index value of feedback system with quality index of a channel.
Wherein, above-mentioned channel environmental information comprises: the quantity that is in the receiver of state of activation in the sub-district; Above-mentioned scheduling mode information comprises: centralized scheduling mode, distributed scheduling mode.
Technical scheme by means of this law invention can realize determining different CQI feedback systems according to communication scenes, has improved the performance of system call.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of being write, claims and accompanying drawing.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used from explanation the present invention with embodiments of the invention one, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the flow chart according to the channel quality index feedback method of the embodiment of the invention;
Fig. 2 is the flow chart according to the detailed process of the channel quality index feedback method of the embodiment of the invention;
Fig. 3 is the block diagram according to the receiver of the embodiment of the invention;
Fig. 4 is the block diagram according to the transmitter of the embodiment of the invention.
Embodiment
Under different scenes, the characteristic difference that channel had is bigger, and, the different translational speeds of travelling carriage are also different to the requirement of feedback delay, therefore, if a kind of technical scheme that can adopt different CQI feedback methods according to the change of communication scenes is arranged, then can improve the performance of scheduling, but, also do not carry out the different CQI feedback schemes that feed back at present at different scenes.Be directed to this, the invention provides a kind of CQI feedback scheme, it can adopt different CQI feedback methods according to the change of communication scenes.
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, and be not used in qualification the present invention.
Method embodiment
According to embodiments of the invention, a kind of channel quality index feedback method is provided, Fig. 1 is the flow chart according to the channel quality index feedback method of the embodiment of the invention, as shown in Figure 1, comprises following processing:
Step S102, transmitter is according to translational speed, channel environmental information and the scheduling mode information of receiver, determine the quality index of a channel feedback system and with the corresponding index information of quality index of a channel feedback system, wherein, channel environmental information comprises: the quantity that is in the receiver of state of activation in the sub-district; Scheduling mode information comprises: centralized scheduling mode, distributed scheduling mode;
Step S104, transmitter sends a notification message to receiver, wherein, carry in the notification message and corresponding index information of quality index of a channel feedback system and feedback resources information, carry receiver required ascending resource when feedback of channel quality indication in the feedback resources information;
Need to prove, at first need in Receiver And Transmitter, to preserve in advance respectively in advance index information, the quality index of a channel feedback system, and the index relative of index information and quality index of a channel feedback system, wherein, carry index value in the index information, index value and quality index of a channel feedback system have index relative, and it is corresponding one by one mutually, transmitter could be according to feedback system and index relative, determine and above-mentioned feedback system corresponding index value, by index information index value is sent to receiver, receiver can go to decide feedback system according to the one-to-one relationship of index value and index value and feedback system.
Step S106, receiver is determined corresponding quality index of a channel feedback system according to index information, and adopts corresponding quality index of a channel feedback system feedback of channel quality indication information according to feedback resources information on ascending resource; After step S106, transmitter is constructed the quality index of a channel value of whole frequency band according to the quality index of a channel information and the index information of feedback, and carries out resource allocation and scheduling according to the quality index of a channel value.
In the present invention, can set in advance the translational speed of channel environmental information, receiver and/or the mapping relations of scheduling mode information and feedback system as required, like this, in step S102, transmitter just can be according to the translational speed and the scheduling mode information of channel environmental information, receiver, search mapping relations, determine the feedback system of corresponding C QI.Concrete mapping relations as shown in Table 1, need to prove, under CQI feedback system characteristic one hurdle in Table 1, for example understand feedback system with feedback system feature corresponding C QI, but, it will be apparent to those skilled in the art that the feedback system with these features is not limited to the feedback system that the present invention gives an example.
Table one
| Channel circumstance and dispatching method | Performance | CQI feedback method characteristic |
| Travelling carriage slowly moves, low-density environment, centralized scheduling | Channel conditions is better and constant substantially | Expense is big, delay is big, feedback is accurate, and for example CQI feeds back fully |
| Travelling carriage slowly moves, low-density environment, distributed scheduling | Channel conditions is better and constant substantially | Expense greatly, delay is big, feedback is accurate, for example presses the complete CQI feedback of the Resource Block that disperses |
| Travelling carriage high-speed mobile, low-density environment, centralized scheduling | Channel conditions is better and change little | Expense is big, delay is bigger, and feedback is accurate, and for example the complete CQI based on subband feeds back |
| Travelling carriage high-speed mobile, low-density environment, distributed scheduling | Channel conditions is better and change little | Expense is big, delay is bigger, and feedback is accurate, and for example the complete CQI based on discontinuous subband feeds back |
| Travelling carriage slowly moves, the high density ring | Selectivity of channel frequency is stronger, | Expense is big, delay is big, feedback is accurate, for example the strongest |
| Border (for example hot spot region), centralized scheduling | But change little | The CQI average feedback of M Resource Block |
| Travelling carriage slowly moves, high concentration environment (for example hot spot region), distributed scheduling | Selectivity of channel frequency is stronger, but changes little | Expense is big, it is big to postpone, feedback accurately, for example feed back based on the CQI average of the strongest M piece of discrete Resource Block |
| The travelling carriage higher speed moves, high concentration environment, centralized scheduling | Selectivity of channel frequency is stronger, and changes bigger | Expense is little, delay is little, the feedback is more rough, the CQI feedback of M for example the strongest Resource Block |
| The travelling carriage higher speed moves, high concentration environment, distributed scheduling | Selectivity of channel frequency is stronger, and changes bigger | Expense is little, delay is little, the feedback is more rough, and for example the CQI based on M the strongest Resource Block of discrete Resource Block feeds back |
The definite of CQI feedback system need carry out according to channel circumstance and scheduling mode.
Translational speed at receiver, set in advance the predetermined speed threshold value, in the translational speed of receiver during less than the predetermined speed threshold value, think that the translational speed of this receiver is slow, during greater than the predetermined speed threshold value, think that the translational speed of this receiver is very fast in the translational speed of receiver, two threshold speeds also can be set, for example, the translational speed of receiver can be thought during less than 3km/hr slowly to move, and the translational speed of receiver can be thought high-speed mobile greater than 120km/hr.
For the environmental density in the table one, because parameters such as system bandwidth, cell coverage area all are uncertain, so the reference value that neither one is fixing it is generally acknowledged that colleges and universities, airport, medium-and-large-sized station, city proper etc. think that Hot Spot is a high concentration environment.
Environmental density at receiver, set in advance the predetermined quantity threshold value, the quantity of receiver that is in state of activation in the sub-district is during less than the predetermined quantity threshold value, think that this environmental density is the low-density environment, the quantity of receiver that is in state of activation in the sub-district thinks that this environmental density belongs to high concentration environment during greater than the predetermined quantity threshold value.
Associative list one, the quantity of receiver that is in state of activation in less than predetermined speed threshold value and sub-district in the translational speed of receiver less than the predetermined quantity threshold value, adopt under the situation of centralized scheduling mode, determine to adopt first kind feedback system, wherein first kind feedback system be expense big, postpone big, feedback accurately and based on the quality index of a channel feedback system of continuous resource piece; For example, CQI feeds back fully;
The quantity of receiver that is in state of activation in less than predetermined speed threshold value and sub-district in the translational speed of receiver less than the predetermined quantity threshold value, adopt under the situation of distributed scheduling mode, determine to adopt the second class feedback system, wherein the second class feedback system be expense big, postpone big, feedback accurately and based on the quality index of a channel feedback system of discrete Resource Block; For example, the complete CQI feedback of discrete Resource Block;
The quantity of receiver that is in state of activation in greater than predetermined speed threshold value and sub-district in the translational speed of receiver less than the predetermined quantity threshold value, adopt under the situation of centralized scheduling mode, determine to adopt the 3rd class feedback system, wherein, the 3rd class feedback system be expense big, postpone big, feedback accurately and based on the quality index of a channel feedback system of continuous resource piece; For example, the complete CQI based on subband feeds back;
The quantity of receiver that is in state of activation in greater than predetermined speed threshold value and sub-district in the translational speed of receiver less than the predetermined quantity threshold value, adopt under the situation of distributed scheduling mode, determine to adopt the 4th class feedback system, wherein, the 4th class feedback system be expense big, postpone big, feedback accurately and based on the quality index of a channel feedback system of discrete Resource Block; For example, the complete CQI based on discontinuous subband feeds back;
The quantity of receiver that is in state of activation in less than predetermined speed threshold value and sub-district in the translational speed of receiver greater than the predetermined quantity threshold value, adopt under the situation of centralized scheduling mode, determine to adopt the 5th class feedback system, wherein, the 5th class feedback system be expense big, postpone big, feedback accurately and based on the quality index of a channel feedback system of continuous resource piece; For example, the CQI average of M the strongest Resource Block feedback;
The quantity of receiver that is in state of activation in less than predetermined speed threshold value and sub-district in the translational speed of receiver greater than the predetermined quantity threshold value, adopt under the situation of distributed scheduling mode, determine to adopt the 6th class feedback system, wherein, the 6th class feedback system be expense big, postpone big, feedback accurately and based on the quality index of a channel feedback system of discrete Resource Block; For example, feed back based on the CQI average of the strongest M piece of discrete Resource Block;
The quantity of receiver that is in state of activation in greater than predetermined speed threshold value and sub-district in the translational speed of receiver greater than the predetermined quantity threshold value, adopt under the situation of centralized scheduling mode, determine to adopt the 7th class feedback system, wherein, the 7th class feedback system be expense little, postpone little, feedback is rough and based on the quality index of a channel feedback system of continuous resource piece; For example, the CQI of M the strongest Resource Block feedback;
The quantity of receiver that is in state of activation in greater than predetermined speed threshold value and sub-district in the translational speed of receiver greater than the predetermined quantity threshold value, adopt under the situation of distributed scheduling mode, determine to adopt the 8th class feedback system, wherein, the 8th class feedback system be expense little, postpone little, feedback is rough and based on the quality index of a channel feedback system of discrete Resource Block, for example, the CQI based on M the strongest Resource Block of discrete Resource Block feeds back.
In addition, for example in the hot zones in urban district (quantity of receiver that is in state of activation in the sub-district is greater than the predetermined quantity threshold value), owing to may include several portable terminals in each sub-district, therefore, each portable terminal must be controlled expense, still when carrying out the CQI feedback, this control expense be with the accuracy of sacrificing feedback as cost, thereby cause the accuracy of CQI feedback more rough relatively.Under above-mentioned situation, if each portable terminal can both be scheduled at those several Resource Block (RB) of its optimum and transmit data, so, for the performance of the system that the performance of whole system is reached with respect to the accurate CQI feedback system of full RB, performance can not reduce a lot.
Wherein, the feedback system of CQI comprises one of following or its combination: average CQI feedback system, fully the fast CQI average feedback system of CQI feedback system, the strongest M the resource of CQI feedback system, the strongest M Resource Block, CQI feedback system, the CQI feedback system based on thresholding, the differential CQI feedback system of the strongest M of a grouping Resource Block, classify continuous resource piece CQI feedback system, classify discontinuous Resource Block CQI feedback system, subband poll feedback system, based on the feedback system of discrete cosine transform, wherein, M is the integer greater than zero.
By technique scheme, can select corresponding CQI feedback system according to communication scenes.
Below, in conjunction with Fig. 2, be example with system with 10M bandwidth, technical scheme of the present invention is described in detail.
The first step, scene is judged in base station (transmitter), in system with 10M bandwidth, have 50 RB, 50 portable terminals are set, in each sub-district according to top channel circumstance, the CQI feedback system of subband Best-5 is determined to adopt in the base station, that is, per 3 RB are divided into a subband, select 5 the strongest sons to bring row feedback (comprising its positional information and corresponding CQI value) into when feeding back at every turn; And the ascending resource (carrying in the feedback resources information) that needs during with feedback system, index value (carrying in the index information) and feedback of channel quality indication feeds back to terminal, and index value is to have predetermined index relative and corresponding one by one with feedback system;
Second step, terminal is after receiving index value, according to index relative, judge the feedback system corresponding with index value, and judge the CQI feedback system that adopts subband Best-5, terminal is calculated the CQI value of each subband, promptly, the average of the CQI value of each RB in this subband, and select 5 subbands the strongest to write down its positional information and CQI value;
In the 3rd step, the ascending resource of terminal needs when carrying feedback of channel quality indication in the feedback resources information of receiving utilizes the ascending resource of base station appointment, to the positional information of selected 5 subbands of base station feedback, corresponding CQI value;
In the 4th step, the CQI value of each RB is recovered according to the feedback of terminal and the index value of feedback method in the base station, that is, the CQI value of the RB in each subband then is subband CQI value;
In the 5th step, scheduling of resource is carried out according to the CQI value of each RB that is recovered in the base station.
By technique scheme, can select the CQI feedback system of subband Best-5 to feed back according to communication scenes, improved the efficient of system.
Device embodiment one
According to embodiments of the invention, a kind of receiver is provided, be used for CQI is fed back.Fig. 3 is the block diagram according to the receiver of the embodiment of the invention, as shown in Figure 3, comprises receiver module 30, determination module 32, feedback module 34, below, above-mentioned module is described in detail.
Receiver module 30, be used to receive notification message from transmitter, wherein, carry in the notification message and corresponding index information of quality index of a channel feedback system and feedback resources information, carry receiver required ascending resource when feedback of channel quality indication in the feedback resources information;
Determination module 32, connect and receiver module 30, be used for receiving according to receiver module 30 with the corresponding index information of quality index of a channel feedback system and carry receiver required ascending resource feedback resources information when the feedback of channel quality indication, determine corresponding quality index of a channel feedback system according to index information;
Feedback module 34, be connected to determination module 32, the feedback system that is used to adopt determination module 32 to determine is fed back CQI to transmitter on the ascending resource of transmitter appointment, wherein, preserve the index relative of index information, index information and feedback system in the feedback module 34 in advance, wherein, index information carries index value, index value and quality index of a channel feedback system have index relative, and corresponding one by one mutually; According to the feedback system and the index relative of quality index of a channel, determine the corresponding index value of feedback system with quality index of a channel.
In addition, receiver can further include: module is set, is used to set in advance the translational speed of channel environmental information, receiver and the mapping relations of scheduling mode information and feedback system.Like this, can the mapping relations that module sets in advance be set, determine corresponding C QI feedback system so that determination module 32 can utilize.
Wherein, it is one of following that the feedback system of above-mentioned quality index of a channel is at least: average channel quality index feedback system, complete channel performance figure feedback system, the quality index of a channel feedback system of a strongest M Resource Block, the quality index of a channel average feedback system that a strongest M resource is fast, the quality index of a channel feedback system of the strongest M of a grouping Resource Block, quality index of a channel feedback system based on thresholding, differential channel quality index feedback system, graduation continuous resource piece quality index of a channel feedback system, the discontinuous Resource Block quality index of a channel feedback system of classifying, the feedback system of subband poll, feedback system based on discrete cosine transform, wherein, M is the integer greater than zero.
By means of receiver of the present invention, realized difference according to communication scenes, utilize different CQI feedback systems to feed back.
Device embodiment two
According to embodiments of the invention, a kind of transmitter is provided, be used for determining employed quality index of a channel feedback system of receiver and the required ascending resource of feedback, and carry out resource allocation according to the quality index of a channel of receiver feedback.Fig. 4 is the block diagram according to the transmitter of the embodiment of the invention, as shown in Figure 4, comprise determination module 40, sending module 42, receiver module 44, resource distribution module 46, in addition, can also comprise module is set, be used to set in advance the translational speed of channel environmental information, receiver and the mapping relations of scheduling mode information and feedback system.Below, above-mentioned each module is described in detail.
Determination module 40, be used for translational speed, channel environmental information and scheduling mode information according to receiver, and according to the mapping relations that are provided with in the module, determine the quality index of a channel feedback system, with the corresponding index information of quality index of a channel feedback system and receiver required ascending resource when feedback of channel quality indication; Wherein, above-mentioned channel environmental information comprises: the quantity that is in the receiver of state of activation in the sub-district; Above-mentioned scheduling mode information comprises: centralized scheduling mode, distributed scheduling mode;
And, above-mentioned determination module 40 also is used for: preserve the feedback system of index information, quality index of a channel and the index relative of index information and feedback system in advance, wherein, index information carries index value, index value and quality index of a channel feedback system have index relative, and corresponding one by one mutually; According to the feedback system and the index relative of quality index of a channel, determine the corresponding index value of feedback system with quality index of a channel.
Sending module 42, be connected to determination module 40, be used for sending a notification message to receiver, wherein, carry in the notification message and corresponding index information of quality index of a channel feedback system and feedback resources information, carry receiver required ascending resource when feedback of channel quality indication in the feedback resources information;
Receiver module 44 is used to receive the quality index of a channel that receiver feeds back;
Resource distribution module 46 is connected to receiver module 44, according to the quality index of a channel information and the index information of feedback, constructs the quality index of a channel value of whole frequency band, and carries out resource allocation and scheduling according to the quality index of a channel value.
Determination module 40 can also comprise searches module, is used for translational speed, channel environmental information and scheduling mode information searching mapping relations according to receiver, determines the feedback system of quality index of a channel.Below, to search the concrete operations of module and carry out brief description (but reference table one), detail can be described with reference to the method embodiment that above provides.
The quantity of receiver that is in state of activation in less than predetermined speed threshold value and sub-district in the translational speed of receiver less than the predetermined quantity threshold value, adopt under the situation of centralized scheduling mode, determine to adopt first kind feedback system, wherein first kind feedback system be expense big, postpone big, feedback accurately and based on the quality index of a channel feedback system of continuous resource piece;
The quantity of receiver that is in state of activation in less than predetermined speed threshold value and sub-district in the translational speed of receiver less than the predetermined quantity threshold value, adopt under the situation of distributed scheduling mode, determine to adopt the second class feedback system, wherein the second class feedback system be expense big, postpone big, feedback accurately and based on the quality index of a channel feedback system of discrete Resource Block;
The quantity of receiver that is in state of activation in greater than predetermined speed threshold value and sub-district in the translational speed of receiver less than the predetermined quantity threshold value, adopt under the situation of centralized scheduling mode, determine to adopt the 3rd class feedback system, wherein, the 3rd class feedback system be expense big, postpone big, feedback accurately and based on the quality index of a channel feedback system of continuous resource piece;
The quantity of receiver that is in state of activation in greater than predetermined speed threshold value and sub-district in the translational speed of receiver less than the predetermined quantity threshold value, adopt under the situation of distributed scheduling mode, determine to adopt the 4th class feedback system, wherein, the 4th class feedback system be expense big, postpone big, feedback accurately and based on the quality index of a channel feedback system of discrete Resource Block;
The quantity of receiver that is in state of activation in less than predetermined speed threshold value and sub-district in the translational speed of receiver greater than the predetermined quantity threshold value, adopt under the situation of centralized scheduling mode, determine to adopt the 5th class feedback system, wherein, the 5th class feedback system be expense big, postpone big, feedback accurately and based on the quality index of a channel feedback system of continuous resource piece;
The quantity of receiver that is in state of activation in less than predetermined speed threshold value and sub-district in the translational speed of receiver greater than the predetermined quantity threshold value, adopt under the situation of distributed scheduling mode, determine to adopt the 6th class feedback system, wherein, the 6th class feedback system be expense big, postpone big, feedback accurately and based on the quality index of a channel feedback system of discrete Resource Block;
The quantity of receiver that is in state of activation in greater than predetermined speed threshold value and sub-district in the translational speed of receiver greater than the predetermined quantity threshold value, adopt under the situation of centralized scheduling mode, determine to adopt the 7th class feedback system, wherein, the 7th class feedback system be expense little, postpone little, feedback is rough and based on the quality index of a channel feedback system of continuous resource piece;
The quantity of receiver that is in state of activation in greater than predetermined speed threshold value and sub-district in the translational speed of receiver greater than the predetermined quantity threshold value, adopt under the situation of distributed scheduling mode, determine to adopt the 8th class feedback system, wherein, the 8th class feedback system be expense little, postpone little, feedback is rough and based on the quality index of a channel feedback system of discrete Resource Block.
In sum,,, determine different CQI feedback systems, can improve the scheduling performance of system by difference according to communication scenes by means of technical scheme of the present invention.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (18)
1. a channel quality index feedback method is characterized in that, comprising:
Transmitter is according to translational speed, channel environmental information and the scheduling mode information of receiver, determine the quality index of a channel feedback system and with the corresponding index information of described quality index of a channel feedback system;
Transmitter sends a notification message to receiver, wherein, carry in the described notification message and corresponding index information of described quality index of a channel feedback system and feedback resources information, carry described receiver required ascending resource when feedback of channel quality indication in the described feedback resources information;
Receiver is determined corresponding quality index of a channel feedback system according to described index information, and adopts corresponding quality index of a channel feedback system feedback of channel quality indication information according to described feedback resources information on described ascending resource.
2. method according to claim 1 is characterized in that, described method further comprises:
Described transmitter is constructed the quality index of a channel value of whole frequency band according to the described quality index of a channel information and the described index information of feedback, and carries out resource allocation and scheduling according to described quality index of a channel value.
3. method according to claim 1, it is characterized in that, transmitter is according to translational speed, channel environmental information and the scheduling mode information of receiver, determine quality index of a channel feedback system and with the corresponding index information of the feedback system of described quality index of a channel before, further comprise:
In described receiver and described transmitter, preserve the index relative of described index information, described quality index of a channel feedback system and described index information and described quality index of a channel feedback system respectively in advance, wherein, carry index value in the described index information, described index value and described quality index of a channel feedback system have described index relative, and corresponding one by one mutually.
4. method according to claim 3 is characterized in that, described transmitter determines that according to described index information corresponding quality index of a channel feedback system is specially:
Described transmitter is determined corresponding quality index of a channel feedback system according to described index value and described index relative.
5. method according to claim 1 is characterized in that,
Described channel environmental information comprises: the quantity that is in the receiver of state of activation in the sub-district;
Described scheduling mode information comprises: centralized scheduling mode, distributed scheduling mode.
6. method according to claim 5 is characterized in that, described method also comprises:
Set in advance the translational speed of channel environmental information, receiver and the mapping relations of scheduling mode information and described feedback system.
7. method according to claim 6 is characterized in that, described transmitter determines that according to translational speed, channel environmental information and the scheduling mode information of receiver the feedback system of quality index of a channel comprises:
Described transmitter is determined the feedback system of described quality index of a channel according to the translational speed of described receiver, described channel environmental information and the described mapping relations of described scheduling mode information searching.
8. method according to claim 7, it is characterized in that, described transmitter determines that according to the translational speed of described receiver, described channel environmental information and the described mapping relations of described scheduling mode information searching the feedback system of described quality index of a channel is specially:
The quantity of receiver that is in state of activation in less than predetermined speed threshold value and sub-district in the translational speed of described receiver less than the predetermined quantity threshold value, adopt under the situation of centralized scheduling mode, determine to adopt first kind feedback system, wherein said first kind feedback system be expense big, postpone big, feedback accurately and based on the quality index of a channel feedback system of continuous resource piece;
The quantity of receiver that is in state of activation in less than predetermined speed threshold value and sub-district in the translational speed of described receiver less than the predetermined quantity threshold value, adopt under the situation of distributed scheduling mode, determine to adopt the second class feedback system, the wherein said second class feedback system be expense big, postpone big, feedback accurately and based on the quality index of a channel feedback system of discrete Resource Block;
The quantity of receiver that is in state of activation in greater than described predetermined speed threshold value and sub-district in the translational speed of described receiver less than described predetermined quantity threshold value, adopt under the situation of centralized scheduling mode, determine to adopt the 3rd class feedback system, wherein, described the 3rd class feedback system be expense big, postpone big, feedback accurately and based on the quality index of a channel feedback system of continuous resource piece;
The quantity of receiver that is in state of activation in greater than described predetermined speed threshold value and sub-district in the translational speed of described receiver less than described predetermined quantity threshold value, adopt under the situation of distributed scheduling mode, determine to adopt the 4th class feedback system, wherein, described the 4th class feedback system be expense big, postpone big, feedback accurately and based on the quality index of a channel feedback system of discrete Resource Block;
The quantity of receiver that is in state of activation in less than described predetermined speed threshold value and sub-district in the translational speed of described receiver greater than described predetermined quantity threshold value, adopt under the situation of centralized scheduling mode, determine to adopt the 5th class feedback system, wherein, described the 5th class feedback system be expense big, postpone big, feedback accurately and based on the quality index of a channel feedback system of continuous resource piece;
The quantity of receiver that is in state of activation in less than described predetermined speed threshold value and sub-district in the translational speed of described receiver greater than described predetermined quantity threshold value, adopt under the situation of distributed scheduling mode, determine to adopt the 6th class feedback system, wherein, described the 6th class feedback system be expense big, postpone big, feedback accurately and based on the quality index of a channel feedback system of discrete Resource Block;
The quantity of receiver that is in state of activation in greater than described predetermined speed threshold value and sub-district in the translational speed of described receiver greater than described predetermined quantity threshold value, adopt under the situation of centralized scheduling mode, determine to adopt the 7th class feedback system, wherein, the 7th class feedback system be expense little, postpone little, feedback is rough and based on the quality index of a channel feedback system of continuous resource piece;
The quantity of receiver that is in state of activation in greater than described predetermined speed threshold value and sub-district in the translational speed of described receiver greater than described predetermined quantity threshold value, adopt under the situation of distributed scheduling mode, determine to adopt the 8th class feedback system, wherein, the 8th class feedback system be expense little, postpone little, feedback is rough and based on the quality index of a channel feedback system of discrete Resource Block.
9. according to each described method in the claim 1 to 8, it is characterized in that the feedback system of described quality index of a channel comprises one of following or its combination:
Average channel quality index feedback system, complete channel performance figure feedback system, the quality index of a channel feedback system of a strongest M Resource Block, the quality index of a channel average feedback system that a strongest M resource is fast, the quality index of a channel feedback system of the strongest M of a grouping Resource Block, quality index of a channel feedback system based on thresholding, differential channel quality index feedback system, graduation continuous resource piece quality index of a channel feedback system, the discontinuous Resource Block quality index of a channel feedback system of classifying, the feedback system of subband poll, feedback system based on discrete cosine transform, wherein, M is the integer greater than zero.
10. a receiver is used for quality index of a channel is fed back, and it is characterized in that, described receiver comprises:
Receiver module, be used to receive notification message from transmitter, wherein, carry in the described notification message and corresponding index information of described quality index of a channel feedback system and feedback resources information, carry described receiver required ascending resource when feedback of channel quality indication in the described feedback resources information;
Determination module is used for determining corresponding quality index of a channel feedback system according to described index information;
Feedback module is used for adopting corresponding quality index of a channel feedback system feedback of channel quality indication information according to described feedback resources information on described ascending resource.
11. receiver according to claim 10 is characterized in that, described receiver further comprises:
Module is set, is used to set in advance the translational speed of channel environmental information, receiver and the mapping relations of scheduling mode information and feedback system.
12. receiver according to claim 10 is characterized in that, it is one of following that the feedback system of described quality index of a channel is at least:
Average channel quality index feedback system, complete channel performance figure feedback system, the quality index of a channel feedback system of a strongest M Resource Block, the quality index of a channel average feedback system that a strongest M resource is fast, the quality index of a channel feedback system of the strongest M of a grouping Resource Block, quality index of a channel feedback system based on thresholding, differential channel quality index feedback system, graduation continuous resource piece quality index of a channel feedback system, the discontinuous Resource Block quality index of a channel feedback system of classifying, the feedback system of subband poll, feedback system based on discrete cosine transform, wherein, M is the integer greater than zero.
13. a transmitter is used for determining employed quality index of a channel feedback system of receiver and the required ascending resource of feedback, and carries out resource allocation according to the quality index of a channel of receiver feedback, it is characterized in that described transmitter comprises:
Determination module, be used for translational speed, channel environmental information and scheduling mode information according to receiver, determine the quality index of a channel feedback system, with the corresponding index information of described quality index of a channel feedback system and described receiver required ascending resource when feedback of channel quality indication;
Sending module, be used for sending a notification message to receiver, wherein, carry in the described notification message and corresponding index information of described quality index of a channel feedback system and feedback resources information, carry described receiver required ascending resource when feedback of channel quality indication in the described feedback resources information;
Receiver module is used to receive the quality index of a channel that described receiver feeds back;
Resource distribution module is used for described quality index of a channel information and described index information according to feedback, constructs the quality index of a channel value of whole frequency band, and carries out resource allocation and scheduling according to described quality index of a channel value.
14. transmitter according to claim 13 is characterized in that, described transmitter further comprises:
Module is set, is used to set in advance the translational speed of channel environmental information, receiver and the mapping relations of scheduling mode information and described feedback system.
15. transmitter according to claim 14 is characterized in that, described determination module further comprises:
Search module, be used for the translational speed according to described receiver, described channel environmental information and the described mapping relations of described scheduling mode information searching, determine the feedback system of described quality index of a channel.
16. transmitter according to claim 15 is characterized in that, the described module of searching specifically is used for:
The quantity of receiver that is in state of activation in less than predetermined speed threshold value and sub-district in the translational speed of described receiver less than the predetermined quantity threshold value, adopt under the situation of centralized scheduling mode, determine to adopt first kind feedback system, wherein said first kind feedback system be expense big, postpone big, feedback accurately and based on the quality index of a channel feedback system of continuous resource piece;
The quantity of receiver that is in state of activation in less than predetermined speed threshold value and sub-district in the translational speed of described receiver less than the predetermined quantity threshold value, adopt under the situation of distributed scheduling mode, determine to adopt the second class feedback system, the wherein said second class feedback system be expense big, postpone big, feedback accurately and based on the quality index of a channel feedback system of discrete Resource Block;
The quantity of receiver that is in state of activation in greater than described predetermined speed threshold value and sub-district in the translational speed of described receiver less than described predetermined quantity threshold value, adopt under the situation of centralized scheduling mode, determine to adopt the 3rd class feedback system, wherein, described the 3rd class feedback system be expense big, postpone big, feedback accurately and based on the quality index of a channel feedback system of continuous resource piece;
The quantity of receiver that is in state of activation in greater than described predetermined speed threshold value and sub-district in the translational speed of described receiver less than described predetermined quantity threshold value, adopt under the situation of distributed scheduling mode, determine to adopt the 4th class feedback system, wherein, described the 4th class feedback system be expense big, postpone big, feedback accurately and based on the quality index of a channel feedback system of discrete Resource Block;
The quantity of receiver that is in state of activation in less than described predetermined speed threshold value and sub-district in the translational speed of described receiver greater than described predetermined quantity threshold value, adopt under the situation of centralized scheduling mode, determine to adopt the 5th class feedback system, wherein, described the 5th class feedback system be expense big, postpone big, feedback accurately and based on the quality index of a channel feedback system of continuous resource piece;
The quantity of receiver that is in state of activation in less than described predetermined speed threshold value and sub-district in the translational speed of described receiver greater than described predetermined quantity threshold value, adopt under the situation of distributed scheduling mode, determine to adopt the 6th class feedback system, wherein, described the 6th class feedback system be expense big, postpone big, feedback accurately and based on the quality index of a channel feedback system of discrete Resource Block;
The quantity of receiver that is in state of activation in greater than described predetermined speed threshold value and sub-district in the translational speed of described receiver greater than described predetermined quantity threshold value, adopt under the situation of centralized scheduling mode, determine to adopt the 7th class feedback system, wherein, the 7th class feedback system be expense little, postpone little, feedback is rough and based on the quality index of a channel feedback system of continuous resource piece;
The quantity of receiver that is in state of activation in greater than described predetermined speed threshold value and sub-district in the translational speed of described receiver greater than described predetermined quantity threshold value, adopt under the situation of distributed scheduling mode, determine to adopt the 8th class feedback system, wherein, the 8th class feedback system be expense little, postpone little, feedback is rough and based on the quality index of a channel feedback system of discrete Resource Block.
17. transmitter according to claim 13 is characterized in that, described determination module specifically is used for:
Preserve the feedback system of described index information, described quality index of a channel and the index relative of described index information and described feedback system in advance, wherein, described index information carries index value, described index value and described quality index of a channel feedback system have described index relative, and corresponding one by one mutually;
According to the feedback system and the described index relative of described quality index of a channel, determine the corresponding index value of feedback system with described quality index of a channel.
18. transmitter according to claim 13 is characterized in that,
Described channel environmental information comprises: the quantity that is in the receiver of state of activation in the sub-district;
Described scheduling mode information comprises: centralized scheduling mode, distributed scheduling mode.
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