CN102064908B - Method and terminal for classified feedback of quality information of sub-band channel on total bandwidth - Google Patents
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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 the terminal of a kind of classifying feedback full bandwidth sub-band channel quality information (CQI, channel quality information).
Background technology
In wireless communication field, in order to improve the performance of communication system, meet the ever-increasing data traffic requirement of user, Orthodoxy Frequency Division Multiplex (Orthogonal Frequency DivisionMultiplexing, referred to as OFDM) and OFDM access (Orthogonal FrequencyDivision Multiple Access) have been introduced.
In OFDMA system, by providing the method for part available subcarrier to realize multiple access for each user.Like this, from the different user of frequency, be (this point is similar to fdma system) at different frequency transmitting datas.Real wireless channel is often accompanied by frequency selective fading (frequency-selective fading), for frequency contents different in signal, wireless transmission channel can present different random responses, and signal waveform after channel will distort.
For the wireless communication system based on OFDM or OFDMA, the frame structure of its this wireless communication system of Radio Resource mapping Main Basis, as shown in Figure 1, frame structure is described the control structure of Radio Resource in time domain, frame structure is divided into Radio Resource the unit of different brackets in time domain, as superframe (Superframe), frame (Frame), subframe (Subframe) and symbol (Symbol).In time-frequency two-dimensional structure, defined be included in X continuous in a frequency subcarrier and in 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 OFDMA system, different Subband is by the different channel fading of experience.That is to say, the user who is dispensed on different Subband can experience different channel fadings.
CQI is a metric that characterizes channel conditions, and the average CQI being defined in a sub-band channel (Subband) is called as Subband CQI.For example, in an OFDMA system, whole bandwidth are divided into P Subband, just have P Subband CQI.
Base station (BS, base station), when distributing Subband resource to different terminals (MS, mobile station), is come the Subband CQI information of feeding back by up channel according to terminal to terminal distribution resource.Wherein, down-run survey signal (for example intermediate pilot signal) within the scope of the full bandwidth that terminal can send according to base station is calculated out all Subband CQI within the scope of full bandwidth, but the finiteness due to uplink channel resources, if all Subband CQI are directly fed back to base station, expense can be very huge.The situation of 12 Subband of take is example, if Subband CQI is quantified as 4bit, transmits the expense that 12 Subband CQI need 48bit.
The method that existing system is taked is to allow MS report Subband sequence number and its corresponding Subband CQI (this method is called Best-M feedback model) of several best (for oneself, being optimum).BS, according to different MS feedack, carries out frequency selective scheduling (frequency selective allocation) according to specific algorithm and criterion, MS is distributed on the Subband of its expectation as far as possible.Consideration is for 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 a Subband to distribute (depending on dispatching algorithm) at random, thereby cause user's QoS can not be guaranteed, also make the throughput of system decline 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 classifying feedback full bandwidth 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 classifying feedback full bandwidth, 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 sequence are classified according to the order of sequence, and the CQI of sorted all kinds of subbands is fed back to respectively to base station.
Further, in said method, described base station receives and preserves the CQI of described all kinds of subbands, when described base station is described terminal while re-starting allocation of subbands, preferentially from some class subbands of the value maximum of CQI, selects subband, distributes to described terminal.
Wherein, the process that described terminal is classified all subbands of sequence is according to the order of sequence 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 comprising according to classify number S and all kinds of subband, ordering all subbands are divided into S class, wherein, the number of sub-bands that classification number S and all kinds of subband comprise is to set in advance or base station notice.
The process that described terminal feeds back to respectively base station by the CQI of all kinds of subbands is as follows:
Described terminal by the CQI of all kinds of subbands respectively periodic feedback give described base station, or when receiving the feedback request for a class or multiclass subband CQI of initiating described base station, 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 M the subband that CQI is the highest, and Equations of The Second Kind subband comprises a high N subband CQI time, and the 3rd class subband comprises K the subband that CQI is the poorest.
Described terminal comprises the subband sign of M the subband that CQI is the highest 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 Equations of The Second Kind subband of described base station feedback;
Described terminal comprises the average CQI of K the subband that CQI is the poorest to the CQI of the 3rd class subband of described base station feedback.
Described terminal is fed back respectively the CQI of all kinds of subbands in a plurality of feedback channels of same frame, or adopts time-multiplexed mode to feed back the CQI of all kinds of subbands.
Further, described terminal is during to the CQI of described base station feedback Equations of The Second Kind subband or the 3rd class subband, adopts once feedback or the mode of feedback repeatedly.
The mobile terminal that the invention also discloses the sub-band channel quality information on a kind of classifying feedback full bandwidth, comprises sort module and feedback module, wherein:
Described sort module, sorts according to the value of the CQI of each subband for all subbands that orthogenic frequency-division multiplexing system is comprised, and all subbands of sequence are divided into some classes according to the order of sequence;
Described feedback module, for feeding back to respectively base station by the CQI of all kinds of subbands of described sort module classification.
Further, in above-mentioned mobile terminal, the process that all subbands that described sort module just sorts are divided into some classes is according to the order of sequence 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 comprising according to classify number S and all kinds of subband, ordering all subbands are divided into S class, wherein, the number of sub-bands that classification number S and all kinds of subband comprise is to set in advance or base station notice.
Further, the process that described feedback module feeds back to respectively base station by the CQI of all kinds of subbands is as follows:
By the CQI of all kinds of subbands respectively periodic feedback give described base station, or when receiving the feedback request for a class or multiclass subband CQI of initiating described base station, to the subband CQI of described base station feedback such or multiclass subband.
Wherein, described feedback module feeds back respectively the CQI of all kinds of subbands in a plurality of feedback channels of same frame, or adopts 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 M the subband that CQI is the highest, and Equations of The Second Kind subband comprises a high N subband CQI time, and the 3rd class subband comprises K the subband that CQI is the poorest.
Described feedback module, comprises the subband sign of M the subband that CQI is the highest and the subband CQI of a described M subband to the CQI of the first kind subband of described base station feedback;
CQI to the Equations of The Second Kind subband of described base station feedback comprises the subband sign of a CQI high N subband and the average CQI of a described N subband;
The average CQI that comprises K the subband that CQI is the poorest to the CQI of the 3rd class subband of described base station feedback.
Described feedback module, during to the CQI of described base station feedback Equations of The Second Kind subband or the 3rd class subband, adopts once 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; Meanwhile, can also make BS obtain the channel information of the subband that corresponding specific MS is the poorest.
Accompanying drawing explanation
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 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 S class, and M requires according to BS or the requirement set in advance feeds back to respectively BS by 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.
, the sub-band channel quality information on the classifying feedback full bandwidth of base station, at least comprises sort module and feedback module.Introduce the function of each module below.
Sort module, for all subbands that ofdm system is comprised, according to the value of each subband CQI, sort, the number of sub-bands comprising according to classify number S and all kinds of subband, ordering all subbands are divided into S class, wherein, the number of sub-bands that classification number S and all kinds of subband comprise is to set in advance or base station notice;
Feedback module, for by the CQI of all kinds of subbands respectively periodic feedback give described base station, or when receiving the feedback request for a class or multiclass subband CQI of initiating described base station, to the subband CQI of described base station feedback such or multiclass subband;
Wherein, feedback module can feed back respectively the CQI of all kinds of subbands in a plurality of feedback channels of same frame, or adopts 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 M the subband that CQI is the highest, and Equations of The Second Kind subband comprises a high N subband CQI time, and the 3rd class subband comprises K the subband that CQI is the poorest;
Feedback module, comprises the subband sign of M the subband that CQI is the highest and the subband CQI of this M subband to the CQI of the first kind subband of base station feedback;
CQI to the Equations of The Second Kind subband of base station feedback comprises the subband sign of a CQI high N subband and the average CQI of this N subband;
The average CQI that comprises K the subband that CQI is the poorest to the CQI of the 3rd class subband of base station feedback.
And feedback module is during to the CQI of base station feedback Equations of The Second Kind subband or the 3rd class subband, can also adopt once feedback or the mode of feedback repeatedly.
The detailed process of introducing in detail the subband CQI on above-mentioned mobile terminal classifying feedback full bandwidth below, as shown in Figure 3, comprises the following steps:
Step 300:MS sorts all Subband of ofdm system according to the value of Subband CQI, and each Subband after sequence is divided into S class;
In this step, MS can be according to the notice of system setting in advance or BS, the all Subband of system are divided into S class by Subband CQI, for example, be divided into Best-M type, Suboptional-N1 type, Suboptional-N1 type the like to Suboptional-NK type and Bad-K type, wherein, Best-M type is optimum (CQI is the highest) M Subband; Suboptional-N1 type is suboptimum (CQI is higher except Best-M) N1 alternative Subband; Suboptional-N2 type is suboptimum (CQI is higher except Best-M and Suboptional-N1) N2 alternative Subband; Suboptional-NK type be suboptimum (except Best-M and Subband-N 1 to the CQI of Suboptional-N (K-1) higher) NK Subband; Bad-K type is the poorest (CQI is minimum) K Subband.
In preferred version, S is 3, and all Subband that MS comprises system are divided into three classes: Best-M type, Suboptional-N type and Bad-K type, and Best-M type is optimum (CQI is the highest) M Subband; Suboptional-N type is suboptimum (CQI is higher except Best-M) N alternative Subband; Bad-K type is the poorest (CQI is minimum) K Subband, and wherein, the value of M, N, K can be to predetermine (being that BS and MS are known before feedback); Or determine and notify MS by BS.
Step 310:MS feeds back to respectively BS by 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, subband sign can be subband numbering (Subband Index), and the Subband CQI of Best-M can be quantified as x bit (feedback content that is Best-M type takies 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, subband sign can be subband numbering, and the Subband CQI of Suboptimal-N can be quantified as y bit (feedback content that is Suboptimal-N type takies 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 Bad-K type takies 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, can be also that BS notifies to MS;
MS is during to the CQI of BS feedback Suboptimal-N type, can adopt a kind of in following two kinds of modes: 1) periodic feedback, i.e. a corresponding contents of the every P frame feedback of MS; 2) aperiodicity feedback, BS, according to the situation of scheduling or the resource situation of uplink feedback channel, initiates request to MS, requires it on corresponding feedback frame, to feed back the corresponding contents of Suboptimal-N, after the MS request of receiving, initiates feedback;
When MS feeds back the CQI of Suboptimal-N type, can adopt the once mode of feedback, 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, be about to be put into after the subband sign of N subband and these information of average CQI of this N subband are cut apart a plurality of subframes feedback that gets on, this is the redundancy (feedback load 7-24bit) of considering SFBCH channel feedback content, therefore feedback content can be cut apart to the rear idle bit of the SFBCH channel of a plurality of subframes that utilizes feeds back, wherein, can set in advance and cut apart rule, or cut apart rule by BS notice MS;
MS is during to the CQI of BS feedback Bad-K type, can adopt a kind of in following two kinds of modes: 1) periodic feedback, i.e. a corresponding contents of the every P frame feedback of MS; 2) aperiodicity feedback, by BS according to the situation of scheduling or the resource situation of uplink feedback channel, initiate request, require it on corresponding feedback frame, to feed back the corresponding contents of Bad-K, after the MS request of receiving, initiate feedback;
When MS feeds back the CQI of Bad-K type, can adopt equally the once mode of feedback, at the average CQI of K the subband that CQI is the poorest of a subframe feedback; Or adopt the repeatedly mode of feedback, after these information of average CQI of K the subband that CQI is the poorest are cut apart, be put into a plurality of subframes feedback that gets on, wherein, can set in advance and cut apart rule, or notify MS to cut apart rule by BS.
Feedback position for Best-M type, Suboptimal-N type and Bad-K type can adopt in following two kinds of modes a kind of: 1) in a plurality of feedback channels of same frame, feed back; 2) adopt the mode of time division multiplexing (TDM, time-division Multiplexing) to feed back, wherein, TDM mode refer to 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 defines in 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 to re-start allocation of subbands for this MS, some class subbands of the preferential value maximum from CQI, selects subband, distributes to this MS;
In this step, the CQI of all kinds of subbands that feed back according to MS due to BS, known the channel information of all subbands of whole system, the channel information that comprises the subband the poorest for MS (being the class subband that CQI value is minimum), like this, at BS, be MS while carrying out sub-band scheduling, just can preferentially from those large class subbands of CQI value, select subband, like this, BS with regard to can not be by allocation of subbands the poorest with regard to MS to MS.
Below in conjunction with concrete application scenarios, the detailed process of the subband CQI on above-mentioned MS classifying feedback full bandwidth is described.
In the present embodiment, the feedback of Best-M adopts the mode of periodic feedback, and wherein, feedback cycle is T, it is a corresponding contents of every T frame feedback, Suboptimal-N and Bad-K adopt non-periodic feedback mode, by BS, initiate the rear MS of request and feed back, and feedback constantly can be identical with feedback Best-M.If, system can be P with total Subband number, system has been predetermined the value of M, and the quantizing bit number of predetermining quantitative 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 respectively 3 bits and 2 bits.
When a certain BS initiates request according to 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 notification 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, then calculate respectively the average CQI of K Subband in the average CQI of N Subband in Suboptimal-N and Bad-K, and feed back respectively Best-M in the different uplink feedback channel of present frame, Suboptimal-N, the corresponding contents of Bad-K.
In the present embodiment, the feedback of Best-M adopts the mode of periodic feedback, and wherein, feedback cycle is T, it is a corresponding contents of every T frame feedback, Suboptimal-N and Bad-K adopt non-periodic feedback mode, and after being initiated to ask by BS, MS feeds back 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 been predetermined the value of M, and the quantizing bit number of predetermining quantitative 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 respectively 3 bits and 2 bits.
When a certain BS initiates request according to scheduling situation to certain MS, require its next frame after feedback Best-M, the corresponding contents of feedback Suboptimal-N and Bad-K, notification terminal N, the value of K, and be that MS (for example distributes corresponding uplink feedback channel resource by the next frame after 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 classified, then feed back the corresponding contents in Best-M, a rear frame at feedback Best-M, MS has remeasured P Subband CQI according to full bandwidth pilot frequency sequence, and complete sequence and classify, then on corresponding channel resource, feed back the corresponding contents of Suboptimal-N and Bad-K.
In the present embodiment, the feedback of Best-M adopts the mode of periodic feedback, wherein, feedback cycle is T, it is a corresponding contents of every T frame feedback, Suboptimal-N and Bad-K adopt non-periodic feedback mode, after initiating request by BS, MS feeds back again, and feedback is the moment of feedback Best-M the feedback of replacing current Best-M constantly.Supposing the system can be P with total Subband number, system has been predetermined the value of M, and the quantizing bit number of predetermining quantitative 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 respectively 3 bits and 2 bits.
When a certain BS initiates request according to scheduling situation to certain MS, while requiring its frame at 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 notification terminal N, the value of K, and (for example distributed corresponding uplink feedback channel resource for MS, fast feedback channel), when 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 classified, calculate respectively the corresponding contents in Suboptimal-N and Bad-K, then in corresponding uplink feedback channel, feed back.
In the present embodiment, the feedback of Best-M adopts the mode of periodic feedback, and wherein, feedback cycle is T, it is a corresponding contents of every T frame feedback, Suboptimal-N and Bad-K adopt non-periodic feedback mode, by BS, initiate the rear MS of request 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 been predetermined the value of M, and the quantizing bit number of predetermining quantitative 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 respectively 3 bits and 2 bits.
When a certain BS initiates request according to 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 notification terminal N, K, and (for example distributed corresponding uplink feedback channel resource for MS, fast feedback channel), at 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 classified, then calculate respectively the corresponding contents in Suboptimal-N and Bad-K, and feed back in corresponding uplink feedback channel.
In the present embodiment, the feedback of Best-M adopts the mode of periodic feedback, and wherein, feedback cycle is T, it is a corresponding contents of every T frame feedback, Suboptimal-N and Bad-K adopt non-periodic feedback mode, by BS, initiate the rear MS of request 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 been predetermined the value of M, and the quantizing bit number of predetermining quantitative 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 respectively 3 bits and 2 bits.
When a certain BS initiates request according to 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 notification terminal N, and (for example distributed corresponding uplink feedback channel resource for MS, fast feedback channel) time, at feedback frame, this MS measures the CQI of P Subband subchannel according to descending full bandwidth pilot frequency sequence, P Subband CQI sorted and classified, then calculate the corresponding contents in Suboptimal-N, and feed back in corresponding uplink feedback channel.
Embodiment 6
In the present embodiment, the feedback of Best-M adopts the mode of periodic feedback, and wherein, feedback cycle is T, it is a corresponding contents of every T frame feedback, Suboptimal-N and Bad-K adopt non-periodic feedback mode, by BS, initiate the rear MS of request 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 been predetermined the value of M, and the quantizing bit number of predetermining quantitative 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 respectively 3 bits and 2 bits.
When a certain BS initiates request according to 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 notification terminal N, and (for example distributed corresponding uplink feedback channel resource for MS, fast feedback channel), at 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 classified, then calculate the corresponding contents in Bad-K, and feed back in corresponding uplink feedback channel.
Embodiment 7
In the present embodiment, the feedback of Best-M adopts the mode of periodic feedback, and wherein, feedback cycle is T, and every T frame feeds back a corresponding contents, and Suboptimal-N and Bad-K adopt 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 been predetermined the value of M, N, K, and the quantizing bit number of predetermining quantitative 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 respectively 3 bits and 2 bits.
At 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 classified, calculate respectively the corresponding contents in Best-M, Suboptimal-N and Bad-K, then in different uplink feedback channel resources, feed back the corresponding contents of Best-M, Suboptimal-N and Bad-K.
Embodiment 8
In the present embodiment, the feedback of Best-M adopts the mode of periodic feedback, wherein, feedback cycle is T, it is a corresponding contents of every T frame feedback, Suboptimal-N and Bad-K adopt periodic feedback mode, and feedback cycle is the feedback cycle of every L Best-M, i.e. L-1 corresponding content of Best-M of every feedback, in the frame of L feedback Best-M, do not feed back Best-M and feed back Suboptimal-N and Bad-K corresponding contents, feedback cycle is L*T.Supposing the system can be P with total Subband number, system has been predetermined the value of M, N, K, and the quantizing bit number of predetermining quantitative classification is: the SubbandCQI of Best-M is quantified as 4 bits, and the Subband CQI of Suboptimal-N and Bad-K is quantified as respectively 3 bits and 2 bits.
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 classified, and calculates respectively corresponding contents the feedback of Best-M; 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, P Subband CQI sorted and classified, and calculates respectively corresponding contents the feedback of Suboptimal-N and Bad-K.
Embodiment 9
In the present embodiment, the feedback of Best-M adopts the mode of periodic feedback, and wherein, feedback cycle is T, it is a corresponding contents of every T frame feedback, Suboptimal-N and Bad-K adopt periodic feedback mode, and feedback cycle is T, and feedback is constantly for the feedback frame of Best-M adds 1.Supposing the system can be P with total Subband number, system has been predetermined the value of M, N, K, and the quantizing bit number of predetermining quantitative classification is: the Subband CQI of Best-M is quantified as 4 bits, and the SubbandCQI of Suboptimal-N and Bad-K is quantified as respectively 3 bits and 2 bits.
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 classified, and calculates respectively the corresponding contents of Best-M 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 classified, calculate respectively the corresponding contents of Suboptimal-N and Bad-K and feed back in the uplink feedback channel identical with feedback Best-M.
From above-described embodiment, can find out that 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; Meanwhile, can also make BS obtain the channel information of the subband that corresponding specific MS is the poorest; And the expense of increase is within the scope of acceptable.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a method of the sub-band channel quality information CQI on classifying feedback full bandwidth, is characterized in that, the 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 sequence are classified according to the order of sequence, and the CQI of sorted all kinds of subbands is fed back to respectively to base station;
Described base station receives and preserves the CQI of described all kinds of subbands, when described base station is described terminal while re-starting allocation of subbands, preferentially from some class subbands of the value maximum of CQI, selects subband, distributes to described terminal;
The process that described terminal is classified all subbands of sequence is according to the order of sequence 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 comprising according to classify number S and all kinds of subband, ordering all subbands are divided into S class, wherein, the number of sub-bands that classification number S and all kinds of subband comprise is to set in advance or base station notice;
The process that described terminal feeds back to respectively base station by the CQI of all kinds of subbands is as follows:
Described terminal by the CQI of all kinds of subbands respectively periodic feedback give described base station, or when receiving the feedback request for a class or multiclass subband CQI of initiating described base station, to the subband CQI of described base station feedback such or multiclass subband.
2. the method for claim 1, is characterized in that,
Described classification number S is 3, and wherein, first kind subband comprises M the subband that CQI is the highest, and Equations of The Second Kind subband comprises a high N subband CQI time, and the 3rd class subband comprises K the subband that CQI is the poorest.
3. method as claimed in claim 2, is characterized in that,
Described terminal comprises the subband sign of M the subband that CQI is the highest 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 Equations of The Second Kind subband of described base station feedback;
Described terminal comprises the average CQI of K the subband that CQI is the poorest to the CQI of the 3rd class subband of described base station feedback.
4. the method for claim 1, is characterized in that,
Described terminal is fed back respectively the CQI of all kinds of subbands in a plurality of feedback channels of same frame, or adopts time-multiplexed mode to feed back the CQI of all kinds of subbands.
5. the method as described in claim 2,3 or 4, is characterized in that,
Described terminal is during to the CQI of described base station feedback Equations of The Second Kind subband or the 3rd class subband, adopts once feedback or the mode of feedback repeatedly.
6. a mobile terminal of the sub-band channel quality information CQI on classifying feedback full bandwidth, is characterized in that, this terminal comprises sort module and feedback module, wherein:
Described sort module; for all subbands that orthogenic frequency-division multiplexing system is comprised, according to the value of the CQI of each subband, sort; all subbands of sequence are divided into some classes according to the order of sequence; be specially: all subbands that orthogenic frequency-division multiplexing system is comprised sort according to the value of each subband CQI; the number of sub-bands comprising according to classify number S and all kinds of subband; ordering all subbands are divided into S class; wherein, the number of sub-bands that classification number S and all kinds of subband comprise is to set in advance or base station notice;
Described feedback module, for the CQI of all kinds of subbands of described sort module classification is fed back to respectively to base station, be specially: the CQI of all kinds of subbands is distinguished to periodic feedback to described base station, or when receiving the feedback request for a class or multiclass subband CQI of described base station initiating, to the subband CQI of described base station feedback such or multiclass subband.
7. mobile terminal as claimed in claim 6, is characterized in that,
Described feedback module feeds back respectively the CQI of all kinds of subbands in a plurality of feedback channels of same frame, or adopts time-multiplexed mode to feed back the CQI of all kinds of subbands.
8. the mobile terminal as described in claim 6 or 7, is characterized in that,
Described classification number S is 3, and wherein, first kind subband comprises M the subband that CQI is the highest, and Equations of The Second Kind subband comprises a high N subband CQI time, and the 3rd class subband comprises K the subband that CQI is the poorest.
9. mobile terminal as claimed in claim 8, is characterized in that,
Described feedback module, comprises the subband sign of M the subband that CQI is the highest and the subband CQI of a described M subband to the CQI of the first kind subband of described base station feedback;
CQI to the Equations of The Second Kind subband of described base station feedback comprises the subband sign of a CQI high N subband and the average CQI of a described N subband;
The average CQI that comprises K the subband that CQI is the poorest to the CQI of the 3rd class subband of described base station feedback.
10. mobile terminal as claimed in claim 9, is characterized in that,
Described feedback module, during to the CQI of described base station feedback Equations of The Second Kind subband or the 3rd class subband, adopts once 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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| CN105680987A (en) * | 2012-03-16 | 2016-06-15 | 北京新岸线移动多媒体技术有限公司 | Method for realizing link self-adaption and network device |
| EP2858284B1 (en) | 2012-07-10 | 2019-12-04 | Huawei Technologies Co., Ltd. | Channel quality indicator acquisition method, user equipment, and evolved node b and system |
| 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 |
| CN103841651B (en) * | 2013-12-10 | 2018-03-27 | 大唐移动通信设备有限公司 | A kind of resource regulating method and base station based on Inter-Cell Interference Coordination |
| CN106817206B (en) * | 2015-11-27 | 2020-04-24 | 北京信威通信技术股份有限公司 | Interference avoidance method and system for multi-hop network |
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| CN101087481A (en) * | 2006-06-02 | 2007-12-12 | 阿尔卡特朗讯 | Channel quality reporting in an orthogonal frequency division multiplexing system |
| WO2008054174A1 (en) * | 2006-11-03 | 2008-05-08 | Lg Electronics Inc. | Method for transmitting channel quality information |
| WO2008115027A1 (en) * | 2007-03-21 | 2008-09-25 | Lg Electronics Inc. | Method of transmitting channel quality indicator in wireless communication system |
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| US8831116B2 (en) * | 2007-03-20 | 2014-09-09 | Motorola Mobility Llc | Method and apparatus for providing channel quality and precoding metric feedback in an orthogonal frequency division multiplexing communication system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101087481A (en) * | 2006-06-02 | 2007-12-12 | 阿尔卡特朗讯 | Channel quality reporting in an orthogonal frequency division multiplexing system |
| WO2008054174A1 (en) * | 2006-11-03 | 2008-05-08 | Lg Electronics Inc. | Method for transmitting channel quality information |
| WO2008115027A1 (en) * | 2007-03-21 | 2008-09-25 | Lg Electronics Inc. | Method of transmitting channel quality indicator in wireless communication system |
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| CN102064908A (en) | 2011-05-18 |
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