CN102064908A - Method and terminal for classified feedback of quality information of sub-band channel on total bandwidth - Google Patents
Method and terminal for classified feedback of quality information of sub-band channel on total bandwidth Download PDFInfo
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Abstract
The invention discloses a method and a terminal for classified feedback of quality information of a sub-band channel on total bandwidth, relating to the field of communication.The method comprises the following steps: the terminal sequences all sub-bands contained in the Orthogonal Frequency Division Multiplexing System (OFDMS) according to CQI value of each sub-band; all sequenced sub-bands are classified according to the order of sequence and CQIs of various classified sub-bands are fed back to the base station.The technical proposal of the invention enables BS to acquire information of a plurality of optimal Sub-bands, CQI and channel information of the sub-bands expect the optimal sub-bands; meanwhile, the technical proposal enables BS to acquire channel information of the least functioning sub-bands corresponding to the specific MS.
Description
Technical field
The present invention relates to the communications field, concrete, relate to method and terminal that full bandwidth sub-band channel quality information (CQI, channel quality information) is fed back in a kind of classification.
Background technology
In wireless communication field, in order to improve the performance of communication system, satisfy the ever-increasing data traffic requirement of user, introduced Orthodoxy Frequency Division Multiplex (Orthogonal Frequency Division Multiplexing abbreviates OFDM as) and OFDM and inserted (Orthogonal Frequency Division Multiple Access).
In the OFDMA system,, the method for part available subcarrier realizes that the multi-user inserts by being provided for each user.Like this, be (this point is similar to fdma system) from the different user of frequency at different frequency transmitting datas.Real wireless channel often is accompanied by frequency selective fading (frequency-selective fading), promptly at frequency contents different in the signal, wireless transmission channel can present different random responses, and signal will distort through waveform behind the channel.
For wireless communication system based on OFDM or OFDMA, the main frame structure of its Radio Resource mapping according to this wireless communication system, as shown in Figure 1, frame structure is described the control structure of Radio Resource on time domain, frame structure is divided into the unit of different brackets with Radio Resource on time domain, as superframe (Superframe), frame (Frame), subframe (Subframe) and symbol (Symbol).In the time-frequency two-dimensional structure, defined be included in X continuous on a frequency subcarrier and on time domain the Resource Block of Y continuous symbol be called physical resource unit (PRU, physical resource unit), and the Resource Block that comprises a N continuous PRU is a subband (Subband), as shown in Figure 2.
Clearly in the OFDMA system, different Subband will experience different channel fadings.That is to say that the user who is dispensed on the different Subband can experience different channel fadings.
CQI is a metric that characterizes channel conditions, and the average CQI that is defined on the sub-band channel (Subband) is called as Subband CQI.For example, in the OFDMA system whole bandwidth are divided into P Subband, just have P Subband CQI.
Base station (BS, base station) will be come to the terminal distribution resource by the Subband CQI information of up channel feedback according to terminal when distributing the Subband resource for different terminals (MS, mobile station).Wherein, terminal can be calculated all the Subband CQI in the full bandwidth scope out according to the down-run survey signal in the full bandwidth scope of base station transmission (pilot signal for example), but because the finiteness of uplink channel resources, if all Subband CQI are directly fed back to the base station, expense can be very huge.Situation with 12 Subband is an example, if Subband CQI is quantified as 4bit, transmits the expense that 12 Subband CQI need 48bit.
The method that existing systems is taked is to allow MS report Subband sequence number and its corresponding Subband CQI (this method is called the Best-M feedback model) of several best (are optimum at oneself).BS carries out frequency selective scheduling (frequency selective allocation) according to the different MS feedack according to specific algorithm and criterion, MS is distributed on the Subband of its expectation as far as possible.Consideration is at a specific MS, BS does not also know other Subband CQI information except the Best-M Subband of its feedback, when scheduling (a plurality of terminals may be competed one or several Subband) at need appears in BS, because BS does not know the CQI information of user on other Subband except Best-M, so BS is merely able to select at random a Subband to distribute (deciding on dispatching algorithm), thereby the QoS that causes the user can not get guaranteeing, also makes the throughput of system descend simultaneously.
Summary of the invention
Technical problem to be solved by this invention is that method and the terminal of the subband CQI on a kind of feedback full bandwidth of classifying is provided.
In order to address the above problem, the invention discloses the method for the sub-band channel quality information (CQI) on a kind of feedback full bandwidth of classifying, comprising:
All subbands that terminal comprises orthogenic frequency-division multiplexing system sort according to the value of the CQI of each subband, all subbands of ordering are classified according to the order of sequence, and the CQI of sorted all kinds of subbands is fed back to the base station respectively.
Further, in the said method, described base station receives and preserves the CQI of described all kinds of subbands, when described base station is a described terminal when carrying out allocation of subbands again, preferentially selects subband from some class subbands of the value maximum of CQI, distributes to described terminal.
Wherein, described terminal all subbands that will sort process of classifying according to the order of sequence is as follows:
All subbands that described terminal comprises orthogenic frequency-division multiplexing system sort according to the value of each subband CQI, the number of sub-bands that is comprised according to classification number S and all kinds of subband, ordering all subbands are divided into the S class, wherein, the number of sub-bands that comprised of classification number S and all kinds of subband is to set in advance or the base station notice.
Described terminal is as follows with the process that the CQI of all kinds of subbands feeds back to the base station respectively:
Described terminal with the CQI of all kinds of subbands respectively periodic feedback give described base station, perhaps receive that described base station initiates at the feedback request of a class or multiclass subband CQI the time, to the subband CQI of described base station feedback such or multiclass subband.
Described classification number S is 3, and wherein, first kind subband comprises the highest M of a CQI subband, and the second class subband comprises a high N subband CQI time, and the 3rd class subband comprises the poorest K of a CQI subband.
Described terminal comprises the subband sign of the highest M of a CQI subband and the subband CQI of a described M subband to the CQI of the first kind subband of described base station feedback;
Described terminal comprises the subband sign of a CQI high N subband and the average CQI of a described N subband to the CQI of the second class subband of described base station feedback;
Described terminal comprises the average CQI of the poorest K of a CQI subband to the CQI of the 3rd class subband of described base station feedback.
Described terminal is fed back the CQI of all kinds of subbands respectively in a plurality of feedback channels of same frame, perhaps adopt time-multiplexed mode to feed back the CQI of all kinds of subbands.
Further, described terminal adopts once the feedback or the mode of feedback repeatedly when the CQI of described base station feedback second class subband or the 3rd class subband.
The invention also discloses the portable terminal of the sub-band channel quality information on a kind of feedback full bandwidth of classifying, comprise sort module and feedback module, wherein:
Described sort module, all subbands that are used for orthogenic frequency-division multiplexing system is comprised sort according to the value of the CQI of each subband, and all subbands that sort are divided into some classes according to the order of sequence;
Described feedback module is used for the CQI of all kinds of subbands of described sort module classification is fed back to the base station respectively.
Further, in the above-mentioned portable terminal, the process that all subbands that described sort module just sorts are divided into some classes according to the order of sequence is as follows:
All subbands that orthogenic frequency-division multiplexing system is comprised sort according to the value of each subband CQI, the number of sub-bands that is comprised according to classification number S and all kinds of subband, ordering all subbands are divided into the S class, wherein, the number of sub-bands that comprised of classification number S and all kinds of subband is to set in advance or the base station notice.
Further, described feedback module is as follows with the process that the CQI of all kinds of subbands feeds back to the base station respectively:
With the CQI of all kinds of subbands respectively periodic feedback give described base station, perhaps receive that described base station initiates at the feedback request of a class or multiclass subband CQI the time, to the subband CQI of described base station feedback such or multiclass subband.
Wherein, described feedback module feeds back the CQI of all kinds of subbands respectively in a plurality of feedback channels of same frame, perhaps adopt time-multiplexed mode to feed back the CQI of all kinds of subbands.
Described classification number S is 3, and wherein, first kind subband comprises the highest M of a CQI subband, and the second class subband comprises a high N subband CQI time, and the 3rd class subband comprises the poorest K of a CQI subband.
Described feedback module comprises the subband sign of the highest M of a CQI subband and the subband CQI of a described M subband to the CQI of the first kind subband of described base station feedback;
Comprise the subband sign of a CQI high N subband and the average CQI of a described N subband to the CQI of the second class subband of described base station feedback;
The average CQI that comprises the poorest K of a CQI subband to the CQI of the 3rd class subband of described base station feedback.
Described feedback module when the CQI of described base station feedback second class subband or the 3rd class subband, adopts once the feedback or the mode of feedback repeatedly.
Adopt technical solution of the present invention can make BS can obtain optimum several Subband and CQI information thereof; And except best subband the channel information of all the other subbands; Simultaneously, can also make BS obtain the channel information of the poorest subband of corresponding specific MS.
Description of drawings
Fig. 1 is the frame structure schematic diagram of existing wireless communications system;
Fig. 2 is existing physical resource unit schematic diagram;
Fig. 3 is for adopting the flow chart of the CQI of each Subband on the technical solution of the present invention feedback full bandwidth.
Embodiment
Main design of the present invention is, can be according to the height of CQI, and all Subband that ofdm system is comprised are divided into the S class, and M requires according to BS or the requirement set in advance feeds back to BS respectively with the CQI of this S class Subband.
Below in conjunction with drawings and the specific embodiments technical solution of the present invention is described in further detail.
A kind of portable terminal, the sub-band channel quality information on base station classification feedback full bandwidth comprises sort module and feedback module at least.Introduce the function of each module below.
Sort module, all subbands that are used for ofdm system is comprised sort according to the value of each subband CQI, the number of sub-bands that is comprised according to classification number S and all kinds of subband, ordering all subbands are divided into the S class, wherein, the number of sub-bands that comprised of classification number S and all kinds of subband is to set in advance or the base station notice;
Feedback module, be used for the CQI of all kinds of subbands respectively periodic feedback give described base station, perhaps receive that described base station initiates at the feedback request of a class or multiclass subband CQI the time, to the subband CQI of described base station feedback such or multiclass subband;
Wherein, feedback module can feed back the CQI of all kinds of subbands respectively in a plurality of feedback channels of same frame, perhaps adopt time-multiplexed mode to feed back the CQI of all kinds of subbands;
In a preferred embodiment, classification number S is 3, and wherein, first kind subband comprises the highest M of a CQI subband, and the second class subband comprises a high N subband CQI time, and the 3rd class subband comprises the poorest K of a CQI subband;
Feedback module comprises the subband sign of the highest M of a CQI subband and the subband CQI of this M subband to the CQI of the first kind subband of base station feedback;
Comprise the subband sign of a CQI high N subband and the average CQI of this N subband to the CQI of the second class subband of base station feedback;
The average CQI that comprises the poorest K of a CQI subband to the CQI of the 3rd class subband of base station feedback.
And feedback module is when the CQI of base station feedback second class subband or the 3rd class subband, can also adopt once the feedback or the mode of feedback repeatedly.
Introduce the detailed process of the subband CQI on the above-mentioned portable terminal classification feedback full bandwidth below in detail, as shown in Figure 3, may further comprise the steps:
Step 300:MS sorts all Subband of ofdm system according to the value of Subband CQI, and each Subband after will sorting is divided into the S class;
In this step, MS can be according to the notice of system's setting in advance or BS, all Subband of system are divided into the S class by Subband CQI, for example, be divided into Best-M type, Suboptional-N1 type, Suboptional-N1 type and the like to Suboptional-NK type and Bad-K type, wherein, the Best-M type is optimum (CQI is the highest) M Subband; The Suboptional-N1 type is suboptimum (CQI is higher except that Best-M) N1 alternative Subband; The Suboptional-N2 type is suboptimum (CQI is higher except that Best-M and Suboptional-N1) N2 alternative Subband; The Suboptional-NK type be suboptimum (except that Best-M and Subband-N1 CQI to Suboptional-N (K-1) higher) NK Subband; The Bad-K type is the poorest (CQI is minimum) K Subband.
In preferred version, S is 3, and promptly MS is divided into three classes with all Subband that system comprises: Best-M type, Suboptional-N type and Bad-K type, Best-M type are optimum (CQI is the highest) M Subband; The Suboptional-N type is suboptimum (CQI is higher except that Best-M) N alternative Subband; The Bad-K type is the poorest (CQI is minimum) K Subband, and wherein, the value of M, N, K can be to predesignate (being that BS and MS are known before feedback); Perhaps by BS decision and notice MS.
Step 310:MS feeds back to BS respectively with the Subband CQI of S class Subband;
In this step, the feedback content of the Best-M type that MS initiates is: the subband of the subband that M CQI is best identifies and the subband CQI of this M subband, wherein, the subband sign can be a subband numbering (Subband Index), and the Subband CQI of Best-M can be quantified as x bit (feedback content that is the Best-M type takies the x bit);
The feedback content of the Suboptimal-N type that MS initiates is: the subband sign of the subband of N CQI suboptimum and the average CQI of this N subband, wherein, the subband sign can be the subband numbering, and the Subband CQI of Suboptimal-N can be quantified as y bit (feedback content that is the Suboptimal-N type takies the y bit);
The feedback content of the Bad-K type that MS initiates is: the average CQI of K the subband that CQI is the poorest, and wherein, the Subband CQI of Bad-K can be quantified as z bit (feedback content that is the Bad-K type takies the z bit);
Preferably, x 〉=y 〉=z.
Wherein, MS can be to the CQI of BS periodic feedback Best-M type, and the feedback frame of the CQI of feedback cycle and Best-M type can be to set in advance, also can be that BS is notified to MS;
MS can adopt a kind of in the following dual mode: 1) periodic feedback, i.e. corresponding contents of the every P frame feedback of MS when the CQI of BS feedback Suboptimal-N type; 2) aperiodicity feedback, BS initiates to ask to MS according to the situation of scheduling or the resource situation of uplink feedback channel, requires the corresponding contents of its feedback Suboptimal-N on corresponding feedback frame, initiates feedback after the MS request of receiving;
When MS feeds back the CQI of Suboptimal-N type, can adopt the once mode of feedback, promptly MS is at the subband sign of N subband of a subframe feedback and the average CQI of this N subband; Can also adopt the repeatedly mode of feedback, after cutting apart, these information of average CQI that are about to the subband sign of N subband and this N subband are put into a plurality of subframes feedback that gets on, this is a redundancy (feedback load 7-24bit) of considering SFBCH channel feedback content, therefore utilize the idle bit of the SFBCH channel of a plurality of subframes to feed back after feedback content can being cut apart, wherein, can configure in advance and cut apart rule, perhaps cut apart rule by BS notice MS;
MS can adopt a kind of in the following dual mode when the CQI of BS feedback Bad-K type:
1) periodic feedback, i.e. corresponding contents of the every P frame feedback of MS; 2) aperiodicity feedback, promptly by BS according to the situation of scheduling or the resource situation of uplink feedback channel, initiate request, require the corresponding contents of its feedback Bad-K on corresponding feedback frame, MS receives that the request back initiates feedback;
When MS feeds back the CQI of Bad-K type, can adopt the once mode of feedback equally, at the average CQI of K the subband that CQI is the poorest of a subframe feedback; Perhaps adopt the repeatedly mode of feedback, be put into a plurality of subframes feedback that gets on after these information of average CQI of K the subband that CQI is the poorest are cut apart, wherein, can configure in advance and cut apart rule, perhaps notify MS to cut apart rule by BS.
Feedback position for Best-M type, Suboptimal-N type and Bad-K type can adopt in the following dual mode a kind of: 1) feed back in a plurality of feedback channels of same frame; 2) adopt the mode of time division multiplexing (TDM, time-division Multiplexing) to feed back, wherein, the TDM mode be meant feedback in be received within the same feedback channel of different frame.
The Physical Resource Block that is specifically designed to feedback relevant parameter and information that above-mentioned feedback channel promptly defines in the system uplink subframe, for example, fast feedback channel.
Step 320:BS receives and preserves the CQI of all kinds of subbands of MS feedback, when BS need carry out allocation of subbands again for this MS, preferentially selects subband from some class subbands of the value maximum of CQI, distributes to this MS;
In this step, because BS is according to the CQI of all kinds of subbands that MS fed back, known the channel information of all subbands of whole system, the channel information that comprises the subband the poorest (being the minimum class subband of CQI value) for MS, like this, be MS when carrying out sub-band scheduling at BS, just can preferentially from those big class subbands of CQI value, select subband, like this, BS just can not give MS with allocation of subbands the poorest with regard to MS.
Below in conjunction with concrete application scenarios, the detailed process of the subband CQI on the above-mentioned MS classification feedback full bandwidth is described.
The feedback of Best-M adopts the mode of periodic feedback in the present embodiment, and wherein, feedback cycle is T, it is corresponding contents of every T frame feedback, Suboptimal-N and Bad-K adopt feedback system aperiodic, promptly initiate request back MS by BS and feed back, and feedback constantly can be identical with feedback Best-M.If, system can be P with total Subband number, system has predesignated the value of M, and predesignates the quantizing bit number that quantizes classification and be: the Subband CQI of Best-M is quantified as 4 bits, and the Subband CQI of Suboptimal-N and Bad-K is quantified as 3 bits and 2 bits respectively.
When a certain BS initiates request according to the scheduling situation to certain MS, require it when feedback Best-M frame arrives, feed back the corresponding contents of Suboptimal-N and Bad-K simultaneously, and notice terminal N, the value of K, and (for example distributed corresponding uplink feedback channel resource for MS, fast feedback channel) time, this MS measures the CQI of P Subband subchannel according to descending full bandwidth pilot frequency sequence, P Subband CQI sorted, and according to M, the value of N and K is classified according to the order of sequence to P Subband, calculate the average CQI of K Subband among the average CQI of N Subband among the Suboptimal-N and the Bad-K then respectively, and on the different uplink feedback channel of present frame, feed back Best-M respectively, Suboptimal-N, the corresponding contents of Bad-K.
The feedback of Best-M adopts the mode of periodic feedback in the present embodiment, and wherein, feedback cycle is T, it is corresponding contents of every T frame feedback, Suboptimal-N and Bad-K adopt feedback system aperiodic, promptly initiate to ask back MS to feed back by BS again, and feedback is constantly for feeding back the next frame of Best-M frame.Supposing the system can be P with total Subband number, system has predesignated the value of M, and the quantizing bit number of predesignating the quantification classification is: the Subband CQI of Best-M is quantified as 4 bits, and the Subband CQI of Suboptimal-N and Bad-K is quantified as 3 bits and 2 bits respectively.
When a certain BS initiates request according to the scheduling situation to certain MS, require its next frame behind feedback Best-M, the corresponding contents of feedback Suboptimal-N and Bad-K, notice terminal N, the value of K, and will be that MS (for example distributes corresponding uplink feedback channel resource at the next frame behind the feedback Best-M, fast feedback channel) time, at Best-M feedback frame, this MS measures the CQI of P Subband subchannel according to descending full bandwidth pilot frequency sequence, and P Subband CQI sorted and classify, feed back the corresponding contents among the Best-M then, back frame at feedback Best-M, MS has remeasured P Subband CQI according to the full bandwidth pilot frequency sequence, and finishes ordering and classification, then the corresponding contents of feedback Suboptimal-N and Bad-K on corresponding channel resources.
The feedback of Best-M adopts the mode of periodic feedback in the present embodiment, wherein, feedback cycle is T, it is corresponding contents of every T frame feedback, Suboptimal-N and Bad-K adopt feedback system aperiodic, promptly initiate request back MS by BS and feed back, feedback is the moment of feedback Best-M and the feedback of replacing current Best-M constantly.Supposing the system can be P with total Subband number, system has predesignated the value of M, and the quantizing bit number of predesignating the quantification classification is: the Subband CQI of Best-M is quantified as 4 bits, and the Subband CQI of Suboptimal-N and Bad-K is quantified as 3 bits and 2 bits respectively.
When a certain BS initiates request according to the scheduling situation to certain MS, require it when the frame of feedback Best-M, do not feed back the corresponding contents of Best-M, but the corresponding contents of feedback Suboptimal-N and Bad-K, and notice terminal N, the value of K, and (for example distributed corresponding uplink feedback channel resource for MS, fast feedback channel), then when the feedback frame arrives, this MS has measured the CQI of P Subband subchannel according to descending full bandwidth pilot frequency sequence, and P Subband CQI sorted and classify, calculate the corresponding contents among Suboptimal-N and the Bad-K respectively, on corresponding uplink feedback channel, feeding back then.
The feedback of Best-M adopts the mode of periodic feedback in the present embodiment, and wherein, feedback cycle is T, it is corresponding contents of every T frame feedback, Suboptimal-N and Bad-K adopt feedback system aperiodic, promptly initiate request back MS by BS and feed back, and feedback is initiated the present frame of request constantly for BS.Supposing the system can be P with total Subband number, system has predesignated the value of M, and the quantizing bit number of predesignating the quantification classification is: the Subband CQI of Best-M is quantified as 4 bits, and the Subband CQI of Suboptimal-N and Bad-K is quantified as 3 bits and 2 bits respectively.
When a certain BS initiates request according to the scheduling situation to certain MS, require it in the sub-frame of uplink of present frame, to feed back the corresponding contents of Suboptimal-N and Bad-K, and the value of notice terminal N, K, and (for example distributed corresponding uplink feedback channel resource for MS, fast feedback channel), then at the feedback frame, this MS measures the CQI of P Subband subchannel according to descending full bandwidth pilot frequency sequence, and P Subband CQI sorted and classify, calculate the corresponding contents among Suboptimal-N and the Bad-K then respectively, and on corresponding uplink feedback channel, feed back.
The feedback of Best-M adopts the mode of periodic feedback in the present embodiment, and wherein, feedback cycle is T, it is corresponding contents of every T frame feedback, Suboptimal-N and Bad-K adopt feedback system aperiodic, promptly initiate request back MS by BS and feed back, and feedback is initiated the present frame of request constantly for BS.Supposing the system can be P with total Subband number, system has predesignated the value of M, and the quantizing bit number of predesignating the quantification classification is: the Subband CQI of Best-M is quantified as 4 bits, and the Subband CQI of Suboptimal-N and Bad-K is quantified as 3 bits and 2 bits respectively.
When a certain BS initiates request according to the scheduling situation to certain MS, require it in the sub-frame of uplink of present frame, to feed back the corresponding contents of Suboptimal-N, and the value of notice terminal N, and (for example distributed corresponding uplink feedback channel resource for MS, fast feedback channel) time, at the feedback frame, this MS measures the CQI of P Subband subchannel according to descending full bandwidth pilot frequency sequence, P Subband CQI sorted and classify, calculate the corresponding contents among the Suboptimal-N then, and on corresponding uplink feedback channel, feed back.
The feedback of Best-M adopts the mode of periodic feedback in the present embodiment, and wherein, feedback cycle is T, it is corresponding contents of every T frame feedback, Suboptimal-N and Bad-K adopt feedback system aperiodic, promptly initiate request back MS by BS and feed back, and feedback is initiated the present frame of request constantly for BS.Supposing the system can be P with total Subband number, system has predesignated the value of M, and the quantizing bit number of predesignating the quantification classification is: the Subband CQI of Best-M is quantified as 4 bits, and the Subband CQI of Suboptimal-N and Bad-K is quantified as 3 bits and 2 bits respectively.
When a certain BS initiates request according to the scheduling situation to certain MS, require it in the sub-frame of uplink of present frame, to feed back the corresponding contents of Bad-K, and the value of notice terminal N, and (for example distributed corresponding uplink feedback channel resource for MS, fast feedback channel), then at the feedback frame, this MS measures the CQI of P Subband subchannel according to descending full bandwidth pilot frequency sequence, and P Subband CQI sorted and classify, calculate the corresponding contents among the Bad-K then, and on corresponding uplink feedback channel, feed back.
Embodiment 7
The feedback of Best-M adopts the mode of periodic feedback in the present embodiment, and wherein, feedback cycle is T, corresponding contents of promptly every T frame feedback, and Suboptimal-N and Bad-K adopt the periodic feedback mode, and feedback cycle is T, and feedback is constantly identical with Best-M.Supposing the system can be P with total Subband number, system has predesignated the value of M, N, K, and the quantizing bit number of predesignating the quantification classification is: the Subband CQI of Best-M is quantified as 4 bits, and the Subband CQI of Suboptimal-N and Bad-K is quantified as 3 bits and 2 bits respectively.
At the feedback frame, this MS measures the CQI of P Subband subchannel according to descending full bandwidth pilot frequency sequence, and P Subband CQI sorted and classify, calculate the corresponding contents among Best-M, Suboptimal-N and the Bad-K respectively, on different uplink feedback channel resources, feed back the corresponding contents of Best-M, Suboptimal-N and Bad-K then.
Embodiment 8
The feedback of Best-M adopts the mode of periodic feedback in the present embodiment, wherein, feedback cycle is T, it is corresponding contents of every T frame feedback, Suboptimal-N and Bad-K adopt the periodic feedback mode, and feedback cycle is the feedback cycle of every L Best-M, L-1 Best-M content corresponding of promptly every feedback, do not feed back Best-M and feed back Suboptimal-N and Bad-K corresponding contents in the frame of L feedback Best-M, promptly feedback cycle is L*T.Supposing the system can be P with total Subband number, system has predesignated the value of M, N, K, and the quantizing bit number of predesignating the quantification classification is: the Subband CQI of Best-M is quantified as 4 bits, and the Subband CQI of Suboptimal-N and Bad-K is quantified as 3 bits and 2 bits respectively.
At feedback Best-M frame, this MS has measured the CQI of P Subband subchannel according to descending full bandwidth pilot frequency sequence, and P Subband CQI sorted and classify, and the corresponding contents that calculates Best-M respectively also feeds back; At the frame of feedback Suboptimal-N and Bad-K, this MS measures the CQI of P Subband subchannel according to descending full bandwidth pilot frequency sequence, and P Subband CQI sorted and classify, and the corresponding contents that calculates Suboptimal-N and Bad-K respectively also feeds back.
The feedback of Best-M adopts the mode of periodic feedback in the present embodiment, and wherein, feedback cycle is T, it is corresponding contents of every T frame feedback, Suboptimal-N and Bad-K adopt the periodic feedback mode, and feedback cycle is T, and feedback adds 1 for the feedback frame of Best-M constantly.Supposing the system can be P with total Subband number, system has predesignated the value of M, N, K, and the quantizing bit number of predesignating the quantification classification is: the Subband CQI of Best-M is quantified as 4 bits, and the Subband CQI of Suboptimal-N and Bad-K is quantified as 3 bits and 2 bits respectively.
At feedback Best-M frame, this MS measures the CQI of P Subband subchannel according to descending full bandwidth pilot frequency sequence, and P Subband CQI sorted and classify, and calculates the corresponding contents of Best-M respectively and feeds back in certain uplink feedback channel; Frame at feedback Suboptimal-N and Bad-K, this MS measures the CQI of P Subband subchannel according to descending full bandwidth pilot frequency sequence, P Subband CQI sorted and classify, calculate the corresponding contents of Suboptimal-N and Bad-K respectively and on the uplink feedback channel identical, feed back with feedback Best-M.
From the foregoing description as can be seen, technical solution of the present invention can make BS can obtain optimum several Subband and CQI information thereof on the one hand; On the other hand, can make BS obtain the channel information of all the other subbands except best subband; Simultaneously, can also make BS obtain the channel information of the poorest subband of corresponding specific MS; And the expense of increase is in the acceptable scope.
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 (15)
1. method of the sub-band channel quality information (CQI) of feedback on the full bandwidth of classifying is characterized in that this method comprises:
All subbands that terminal comprises orthogenic frequency-division multiplexing system sort according to the value of the CQI of each subband, all subbands of ordering are classified according to the order of sequence, and the CQI of sorted all kinds of subbands is fed back to the base station respectively.
2. the method for claim 1 is characterized in that,
Described base station receives and preserves the CQI of described all kinds of subbands, when described base station is a described terminal when carrying out allocation of subbands again, preferentially selects subband from some class subbands of the value maximum of CQI, distributes to described terminal.
3. method as claimed in claim 1 or 2 is characterized in that, the process that all subbands that described terminal will sort are classified according to the order of sequence is as follows:
All subbands that described terminal comprises orthogenic frequency-division multiplexing system sort according to the value of each subband CQI, the number of sub-bands that is comprised according to classification number S and all kinds of subband, ordering all subbands are divided into the S class, wherein, the number of sub-bands that comprised of classification number S and all kinds of subband is to set in advance or the base station notice.
4. method as claimed in claim 3 is characterized in that, described terminal is as follows with the process that the CQI of all kinds of subbands feeds back to the base station respectively:
Described terminal with the CQI of all kinds of subbands respectively periodic feedback give described base station, perhaps receive that described base station initiates at the feedback request of a class or multiclass subband CQI the time, to the subband CQI of described base station feedback such or multiclass subband.
5. method as claimed in claim 4 is characterized in that,
Described classification number S is 3, and wherein, first kind subband comprises the highest M of a CQI subband, and the second class subband comprises a high N subband CQI time, and the 3rd class subband comprises the poorest K of a CQI subband.
6. method as claimed in claim 5 is characterized in that,
Described terminal comprises the subband sign of the highest M of a CQI subband and the subband CQI of a described M subband to the CQI of the first kind subband of described base station feedback;
Described terminal comprises the subband sign of a CQI high N subband and the average CQI of a described N subband to the CQI of the second class subband of described base station feedback;
Described terminal comprises the average CQI of the poorest K of a CQI subband to the CQI of the 3rd class subband of described base station feedback.
7. method as claimed in claim 4 is characterized in that,
Described terminal is fed back the CQI of all kinds of subbands respectively in a plurality of feedback channels of same frame, perhaps adopt time-multiplexed mode to feed back the CQI of all kinds of subbands.
8. as claim 5,6 or 7 described methods, it is characterized in that,
Described terminal adopts once the feedback or the mode of feedback repeatedly when the CQI of described base station feedback second class subband or the 3rd class subband.
9. the portable terminal of the sub-band channel quality information of feedback on the full bandwidth of classifying is characterized in that this terminal comprises sort module and feedback module, wherein:
Described sort module, all subbands that are used for orthogenic frequency-division multiplexing system is comprised sort according to the value of the CQI of each subband, and all subbands that sort are divided into some classes according to the order of sequence;
Described feedback module is used for the CQI of all kinds of subbands of described sort module classification is fed back to the base station respectively.
10. portable terminal as claimed in claim 9 is characterized in that,
The process that all subbands that described sort module just sorts are divided into some classes according to the order of sequence is as follows:
All subbands that orthogenic frequency-division multiplexing system is comprised sort according to the value of each subband CQI, the number of sub-bands that is comprised according to classification number S and all kinds of subband, ordering all subbands are divided into the S class, wherein, the number of sub-bands that comprised of classification number S and all kinds of subband is to set in advance or the base station notice.
11. portable terminal as claimed in claim 10 is characterized in that, described feedback module is as follows with the process that the CQI of all kinds of subbands feeds back to the base station respectively:
With the CQI of all kinds of subbands respectively periodic feedback give described base station, perhaps receive that described base station initiates at the feedback request of a class or multiclass subband CQI the time, to the subband CQI of described base station feedback such or multiclass subband.
12. portable terminal as claimed in claim 11 is characterized in that,
Described feedback module feeds back the CQI of all kinds of subbands respectively in a plurality of feedback channels of same frame, perhaps adopt time-multiplexed mode to feed back the CQI of all kinds of subbands.
13. as claim 10,11 or 12 described portable terminals, it is characterized in that,
Described classification number S is 3, and wherein, first kind subband comprises the highest M of a CQI subband, and the second class subband comprises a high N subband CQI time, and the 3rd class subband comprises the poorest K of a CQI subband.
14. portable terminal as claimed in claim 13 is characterized in that,
Described feedback module comprises the subband sign of the highest M of a CQI subband and the subband CQI of a described M subband to the CQI of the first kind subband of described base station feedback;
Comprise the subband sign of a CQI high N subband and the average CQI of a described N subband to the CQI of the second class subband of described base station feedback;
The average CQI that comprises the poorest K of a CQI subband to the CQI of the 3rd class subband of described base station feedback.
15. portable terminal as claimed in claim 14 is characterized in that,
Described feedback module when the CQI of described base station feedback second class subband or the 3rd class subband, adopts once the feedback or the mode of feedback repeatedly.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN200910223386.1A CN102064908B (en) | 2009-11-18 | 2009-11-18 | Method and terminal for classified feedback of quality information of sub-band channel on total bandwidth |
| PCT/CN2010/073320 WO2010148903A1 (en) | 2009-11-18 | 2010-05-27 | Method and terminal for feeding back channel quality information of sub-bands over all bands |
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| CN200910223386.1A CN102064908B (en) | 2009-11-18 | 2009-11-18 | Method and terminal for classified feedback of quality information of sub-band channel on total bandwidth |
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| CN102064908B CN102064908B (en) | 2014-02-19 |
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| CN103595498B (en) * | 2012-08-13 | 2016-08-03 | 普天信息技术研究院有限公司 | The system of selection of a kind of working sub-band and communication system |
| CN106817206A (en) * | 2015-11-27 | 2017-06-09 | 北京信威通信技术股份有限公司 | For the interference bypassing method and system of multihop network |
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Also Published As
| Publication number | Publication date |
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| WO2010148903A1 (en) | 2010-12-29 |
| CN102064908B (en) | 2014-02-19 |
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