CN101917256A - Mobile station apparatus, base station apparatus and communication means - Google Patents
Mobile station apparatus, base station apparatus and communication means Download PDFInfo
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Abstract
Carry out the mobile terminal apparatus of multi-carrier communication with base station apparatus, can cut down the feedback data amount that is used for, the precision of feedback information is not descended, thereby improve communication quality.In this mobile station apparatus (100), incoming level measuring unit (135) is based on known signal, measure SINR as the incoming level of each piece that constitutes by a plurality of subcarriers, control information sending controling unit (160) will send to base station apparatus (200) based on the feedback information (CQI information) of the communication quality of each piece, relative value calculating part (150) according to the incoming level of each piece calculate with adjacent block between the relative value of the corresponding MCS of incoming level, CQI information generating unit (155) according to the absolute value of the MCS corresponding with the incoming level of reference block and with the relative value of the corresponding MCS of incoming level between the described adjacent block, generate feedback information (CQI information).
Description
The application be that August 4, application number in 2005 are 200580051083.6 the applying date, denomination of invention divides an application for the application for a patent for invention of " mobile station apparatus ".
Technical field
The present invention relates to mobile station apparatus, particularly carry out the mobile station apparatus of multi-carrier communication with base station apparatus.
Background technology
In the OFDM transmission, there is the different situation (with reference to Fig. 1) of communication quality that causes each subcarrier because of the influence of frequency selective fading.And in descending OFDM transmission, the conditions of propagation paths difference of each terminal (UE) so base station (Node-B) makes each UE report communication quality, thereby can only be selected the good subcarrier of communication quality and distribute to send data for each UE.This distribution method is called frequency scheduling.
Usually,, need each terminal based on the known pilot signal measurement quality of reception that sends from the base station in order to carry out frequency scheduling, and to the communication quality information (CQI) of base station report based on measurement result.But have following problem: under the more situation of the number of sub that constitutes ofdm signal, if carry out the report of the CQI of relevant all subcarrier, then CQI report quantitative change gets hugely, will waste ascending wireless resource.
Therefore, in the past, the method for various reduction CQI report amounts had been proposed.For example, in non-patent literature 1, import the relative value of the quality of reception of the such time/frequency field of Fig. 1, thereby cut down CQI report amount.Particularly, as shown in Figure 2, for piece #1, report CQI absolute value.For other piece, report is with respect to the relative value (CQI relative value) of each piece of the CQI of piece #1.In this way, compare, can cut down the data traffic volume that is used to report with report the CQI absolute value for all pieces.Here, so-called " piece (chunk) " typically refers to the bundle of subcarrier continuous on frequency direction, be meant especially in the scheduling of base station apparatus, the bundle of the bivector of the subcarrier of specified quantity and the TTI of specified quantity (constituting), and the least unit that terminal installation is distributed by time shaft and frequency axis.
Non-patent literature 1:NTT DOCOMO3GPP Standard Quasiization is posted Books (standardization submission) R1-050590
Summary of the invention
The problem that invention will solve
But, in OFDM transmission in the past, have following problem.That is to say, the 1st, owing to be that benchmark is asked the CQI relative value always, so under the confined situation of preparing in order to report the CQI relative value of bit number, then can not correctly show more cataclysmal frequency selective fading pattern with CQI relevant with frequency and that be among some of edge.For example, as shown in Figure 3, under the situation that with piece 1 is the benchmark relative value of reporting CQI, at the bit number of preparing for the relative value of representing CQI is 2 o'clock, if its CQI is different from the CQI as the piece 1 of benchmark as piece 5 and piece 6, then can not represent the relative value of CQI with the bit of preparing.That is,, make as the selection of reference block when inappropriate the precise decreasing of the CQI of other pieces owing to the CQI of the piece of selecting as benchmark and the CQI of other piece differ bigger reasons such as situation.Therefore, there is precise decreasing, the problem that causes communication quality to descend owing to the report value of CQI.
The object of the present invention is to provide mobile station apparatus, it and base station apparatus carry out multi-carrier communication, can cut down the feedback data amount that is used for, and the precision of feedback information is not descended, thereby improve communication quality.
The scheme that addresses this problem
Mobile station apparatus of the present invention comprises: computing unit, by the sub-carrier group that constitutes at the continuous a plurality of subcarriers of frequency domain, calculate the CQI value that is used to represent communication quality to each; Generation unit from the described CQI value that calculates, generates feedback information; And transmitting element, send described feedback information, wherein, described computing unit with a CQI value of the communication quality that reflected all described sub-carrier groups as benchmark, calculating is as the CQI difference value of the difference value of the described CQI value of each described sub-carrier group, described generation unit will be configured in the beginning of serial data as a described CQI value of benchmark, then dispose described CQI difference value successively, generate described feedback information from the described sub-carrier group of frequency maximum or frequency minimum along pairing each the described sub-carrier group of frequency direction.
Base station apparatus of the present invention comprises: transmitting element, use described sub-carrier group, and send to above-mentioned mobile station apparatus of the present invention with sending data; And receiving element, receive the feedback information that sends from described mobile station apparatus.
Base station apparatus of the present invention comprises: transmitting element, use a plurality ofly by the sub-carrier group that constitutes at the continuous a plurality of subcarriers of frequency domain, and will send data and send to mobile station apparatus; And receiving element, receiving feedback information, described feedback information is in described mobile station apparatus, after a CQI value as benchmark, then dispose the feedback information from the described sub-carrier group of frequency maximum or frequency minimum along the CQI difference value of pairing each the described sub-carrier group of frequency direction successively, described CQI difference value is the CQI difference value as the difference value of the CQI value of each described sub-carrier group that benchmark calculates for the described CQI value with the communication quality that reflected all described sub-carrier groups.
Communication means of the present invention comprises: calculation procedure, each by the sub-carrier group that constitutes at the continuous a plurality of subcarriers of frequency domain, is calculated the CQI value that is used to represent communication quality; Generate step,, generate feedback information from the described CQI value that calculates; And forwarding step, send described CQI value, wherein, a CQI value with the communication quality that reflected all described sub-carrier groups in the described calculation procedure is a benchmark, calculating is as the CQI difference value of the difference value of the described CQI value of each described sub-carrier group, to be configured in the beginning of serial data as a described CQI value of benchmark in the described generation step, then dispose described CQI difference value successively, generate described feedback information from the described sub-carrier group of frequency maximum or frequency minimum along pairing each the described sub-carrier group of frequency direction.
Communication means of the present invention comprises: forwarding step, use by, a plurality of sub-carrier groups that constitute at the continuous a plurality of subcarriers of frequency domain, and will send data and send to mobile station apparatus; And receiving step, receiving feedback information, described feedback information is in described mobile station apparatus, after a CQI value as benchmark, then dispose the feedback information from the described sub-carrier group of frequency maximum or frequency minimum along the CQI difference value of pairing each the described sub-carrier group of frequency direction successively, described CQI difference value is the CQI difference value as the difference value of the CQI value of each described sub-carrier group that benchmark calculates for the described CQI value with the communication quality that reflected all described sub-carrier groups.
Mobile station apparatus of the present invention carries out multi-carrier communication with base station apparatus, and the structure that its adopts comprises: the measurement of communication quality unit, based on known signal, the communication quality of each piece of being made of a plurality of subcarriers is measured; Transmitting element will send to described base station apparatus based on the feedback information of the communication quality of each piece; Relative value calculating part is according to the relative value of the communication quality between the communication quality calculating adjacent block of each piece; And the feedback information generation unit, according to the absolute value of the communication quality of reference block and the relative value of the communication quality between the described adjacent block, generate described feedback information.
The beneficial effect of the invention
According to the present invention, mobile station apparatus can be provided, it and base station apparatus carry out multi-carrier communication, cut down to be used for the feedback data amount, and the precision of feedback information is not descended, thereby improve communication quality.
Description of drawings
Fig. 1 is the influence of expression owing to frequency selective fading, the figure of the situation of the communication quality change of each subcarrier;
Fig. 2 is the figure of generating mode that is used to illustrate the feedback information of mobile station apparatus in the past;
Fig. 3 is the figure of generating mode that is used to illustrate the feedback information of mobile station apparatus in the past;
Fig. 4 is the block diagram of structure of the mobile station apparatus of expression embodiment of the present invention 1;
Fig. 5 is the figure of feedback information generating mode that is used for the mobile station apparatus of key diagram 4;
Fig. 6 is the figure of feedback information generating mode that is used for the mobile station apparatus of key diagram 4;
Fig. 7 is the figure of feedback information generating mode that is used for the mobile station apparatus of key diagram 4;
Fig. 8 is the block diagram of structure of the base station apparatus of expression execution mode 1;
Fig. 9 is the figure that is used for other modes that the feedback information of the mobile station apparatus of key diagram 4 generates;
Figure 10 is the figure that is used for other modes that the feedback information of the mobile station apparatus of key diagram 4 generates;
Figure 11 is the figure of feedback information generating mode that is used for the mobile station apparatus of key diagram 4;
Figure 12 is the block diagram of structure of the mobile station apparatus of expression execution mode 2;
Figure 13 is the figure of step-length (step size) change that is used to illustrate the mobile station apparatus of Figure 12;
Figure 14 is the figure of an example of structure of the CQI information of expression execution mode 2;
Figure 15 is the block diagram of structure of the base station apparatus of expression execution mode 2;
Figure 16 is the block diagram of structure of the mobile station apparatus of expression execution mode 3;
Figure 17 is the figure of step-length change that is used to illustrate the mobile station apparatus of Figure 16; And
Figure 18 is the block diagram of structure of the base station apparatus of expression execution mode 3.
Embodiment
Below, the execution mode that present invention will be described in detail with reference to the accompanying.In addition, in execution mode, give same numeral,, therefore omit because its explanation repeats to identical inscape.
(execution mode 1)
As shown in Figure 4, the travelling carriage 100 of execution mode 1 comprises: RF receiving element 105, GI remove unit 110, FFT unit 115, demodulating unit 120, error correction decoding unit 125, separative element 130, incoming level measuring unit 135, reference block decision unit 140, MCS decision unit 145, relative value calculating part 150, CQI information generating unit 155, control information sending controling unit 160, error correction coding unit 165, modulating unit 170, IFFT unit 175, GI insertion unit 180 and RF transmitting element 185.
The received signal that GI removes after unit 110 is handled from RF is removed guard interval, outputs to FFT unit 115.
Received signal after the guard interval that FFT unit 115 input is removed unit 110 from GI is removed is carried out FFT to this input signal and is handled.Then, the received signal after FFT is handled in FFT unit 115 outputs to incoming level measuring unit 135 and demodulating unit 120.
Incoming level measuring unit 135 uses the pilot signal in the received signal that is included in after FFT handles, and measures the incoming level of each piece (chunk).Here so-called " piece " is meant sub-carrier group continuous on frequency direction, discontinuous sub-carrier group or the time of passing through and the determined zone of frequency that are made of a plurality of subcarriers and TTI.And piece is used as the least unit of the resource of distributing to a travelling carriage (UE).
Reference block decision unit 140 based on the incoming level of measuring by incoming level measuring unit 135 (for example, SINR), rule according to the rules, decision reports to the absolute value of MCS as CQI information the piece (reference block) of base station apparatus 200 described later.So-called predetermined rule is meant, for example the piece that will determine in advance is made as the rule etc. that the rule of reference block, the piece that incoming level is the highest are made as reference block.In execution mode 1, suppose that the piece decision that incoming level is the highest is as reference block.Like this, be made as reference block, make the best piece of line quality become reference block, so can improve the precision of the CQI information that generates in view of the above by the piece that incoming level is the highest.Particularly have following possibility since with relative value as difference (relative value), so when the amplitude of fluctuation of difference stride and propagation path does not match, along with away from reference block, the precise decreasing of CQI.Usually, under the situation of carrying out frequency scheduling, give the good piece of CQI with resource allocation, so pay attention to the information of the good piece of relevant CQI.Thus, for CQI information, the preferred especially precision that improves the information of the good piece of relevant line quality.In addition, be made as benchmark, make the highest value of reliability, so the reliability of the relative value of the piece of other of trying to achieve based on the incoming level of this reference block also uprises as benchmark by the piece that incoming level is high.
Relative value calculating part 150 is based on by the reference block of reference block decision unit 140 decisions and by the MCS of each piece of MCS decision unit 145 decisions, calculates the relative value with the MCS of adjacent block.
Particularly, at first, relative value calculating part 150 is temporarily preserved the absolute value of MCS for reference block, calculates and temporary transient relative value of preserving with the MCS of adjacent block for other piece.
As the method for asking for of the relative value of the MCS between the adjacent block, for example, as shown in Figure 5, change at the benchmark when reference block is asked relative value successively on the frequency direction, ask the relative value of MCS.If describe in detail more with reference to Fig. 6, then in the figure, the piece 5 of incoming level maximum is determined as reference block.Therefore, about with compare the little piece of frequency 1～4 as the piece 5 of reference block, as following, calculating successively with piece 5 is the relative value (in the figure for negative value) of MCS of the piece 4 of benchmark, is the relative value of MCS of the piece 3 of benchmark with piece 4.In addition, and compare the big piece of frequency 6～8 as the piece 5 of reference block, as following, calculating successively with piece 5 is the relative value of MCS of the piece 6 of benchmark, is the relative value of MCS of the piece 7 of benchmark with piece 6.
CQI information generating unit 155 use the MCS between the adjacent block that calculates by relative value calculating part 150 relative value, reference block MCS absolute value and from the reference block information of reference block decision unit 140, generate CQI information.
As shown in Figure 7, generate CQI information.That is to say, CQI information generating unit 155 is configured in the absolute value of the MCS of the sequence number of reference block and this reference block the beginning of serial data, dispose the piece at the edge on the frequency direction following closely successively, be the piece or the minimum BOB(beginning of block) of frequency maximum, folk prescription is to the relative value of the MCS of the adjacent block that calculates on frequency direction, thereby generates CQI information.
160 controls of control information sending controling unit are by the transmission to base station apparatus 200 described later of the CQI information of CQI information generating unit 155 generations.
CQI information from 160 outputs of control information sending controling unit; carrying out error correction coding by error correction coding unit 165; modulate by modulating unit 170; carry out IFFT by IFFT unit 175; and, be sent to base station apparatus 200 described later by RF transmitting element 185 by behind the GI insertion unit 180 insertion guard intervals.
Received signal after demodulating unit 120 input FFT handle is carried out demodulation according to information of radio resource allocation, and the received signal after the demodulation is outputed to error correction decoding unit 125.
Received signal after the 125 input demodulation of error correction decoding unit is carried out error correction decoding according to information of radio resource allocation, and the signal behind the error correction decoding is outputed to separative element 130.
Signal behind the separative element 130 input error correction decodings is separated into various information such as receiving data, information of radio resource allocation and CQI information, and relevant information of radio resource allocation is outputed to demodulating unit 120 and error correction decoding unit 125.
As shown in Figure 8, the base station apparatus 200 of execution mode 1 comprises: RF receiving element 205, GI remove unit 210, FFT unit 215, demodulating unit 220, error correction decoding unit 225, separative element 230, CQI information receiving unit 235, CQI information analysis unit 240, scheduling unit 245, control information sending controling unit 250, Multiplexing Unit 255, send data generating unit 260, pilot generation unit 265, error correction coding unit 270, modulating unit 275, IFFT unit 280, GI insertion unit 285 and RF transmitting element 290.
The received signal that GI removes after unit 210 is handled from RF is removed guard interval, outputs to FFT unit 215.
Received signal after the guard interval that FFT unit 215 input is removed unit 210 from GI is removed is carried out FFT to this input signal and is handled.Then, the received signal after FFT is handled in FFT unit 215 outputs to demodulating unit 220.
Received signal after demodulating unit 220 input FFT handle is carried out demodulation according to information of radio resource allocation, and the received signal after the demodulation is outputed to error correction decoding unit 225.
Received signal after the 225 input demodulation of error correction decoding unit is carried out error correction decoding according to information of radio resource allocation, and the signal behind the error correction decoding is outputed to separative element 230.
Signal behind the separative element 230 input error correction decodings, be separated into various information such as receiving data, information of radio resource allocation and CQI information, and relevant information of radio resource allocation outputed to demodulating unit 220 and error correction decoding unit 225, relevant CQI information is outputed to CQI information receiving unit 235.The CQI information of being exported is output to CQI information analysis unit 240 by CQI information receiving unit 235.
Because described CQI information is above-mentioned structure, that is to say that the absolute value for the MCS of the sequence number of reference block and this reference block is configured in the beginning of data rows, following closely the piece at the edge on the frequency direction, be the piece or the minimum BOB(beginning of block) of frequency maximum, the structure that on frequency direction, is disposed successively to the relative value of the MCS of the adjacent block that calculates towards the reference block folk prescription, so CQI information analysis unit 240 based on this CQI information, calculates the absolute value of MCS to all pieces.The absolute value of the MCS of each piece is output to scheduling unit 245.
Multiplexing Unit 255 input is from the transmission data that send data generating unit 260, from the pilot signal of pilot generation unit 265 and from the schedule information of control information sending controling unit 250, and carries out multiplexing.Signal after multiplexing is carried out error correction coding by error correction coding unit 270; modulate by modulating unit 275; and carry out IFFT by IFFT unit 280, after inserting unit 285 by GI and inserting guard intervals, send to mobile station apparatus 100 by RF transmitting element 290.
In addition, in the above description, illustrated from reference block as the acquiring method of the relative value of the MCS between the adjacent block and to have begun to change successively the situation that benchmark is asked, but be not limited thereto, even ask the relative value of MCS towards the big piece folk prescription of frequency to ground from the little BOB(beginning of block) of frequency as shown in Figure 9, or ask the relative value of MCS also passable towards the little piece folk prescription of frequency to ground from the big BOB(beginning of block) of frequency as shown in Figure 10 on the contrary.
In addition, in the above description, following situation is illustrated, determines the MCS of each piece, and generate CQI information according to the relative value of the MCS of the absolute value of the MCS of reference block and adjacent block etc. according to the incoming level of measuring by mobile station apparatus 100.But, the invention is not restricted to this, can not determine MCS yet and use the incoming level of measuring at mobile station apparatus 100 as CQI information.That is to say, in mobile station apparatus 100, the incoming level that also can use reference block (for example, the relative value of the absolute value SINR) and the incoming level of adjacent block etc. generates CQI information, and use the CQI information decision MCS that receives, and dispatch as the base station apparatus 200 of the receiving terminal of this CQI information.
Like this, according to execution mode 1, carrying out being provided with in the mobile station apparatus 100 of multi-carrier communication with base station apparatus 200: incoming level measuring unit 135, based on known signal (from the pilot signal of base station apparatus 200), the communication quality of each piece that measurement is made of a plurality of subcarriers SINR of incoming level (for example, as); Control information sending controling unit 160 will send to base station apparatus 200 based on the feedback information (CQI information) of the communication quality of each piece; Relative value calculating part 150 is calculated the relative value (for example, the relative value of the relative value of SINR, the MCS corresponding with SINR) of the communication quality between the adjacent block according to the communication quality of each piece SINR of incoming level (for example, as); And CQI information generating unit 155, according to the absolute value of the communication quality of reference block (for example, the absolute value of the absolute value of SINR, the MCS corresponding) with SINR and the relative value of the communication quality between the described adjacent block (for example, the relative value of the relative value of SINR, the MCS corresponding), generate feedback information (CQI information) with SINR.
Thus, because the relative value according to the communication quality between the adjacent block generates feedback information, so for example, even the communication conditions that changes significantly of communication quality as shown in figure 11, also can generate the feedback information of the variation that has more correctly reflected communication quality and not increase the amount of information of representing communication quality, thereby can cut down the feedback data amount that is used for, improve the precision of feedback information.Its result in the base station apparatus 200 of receiving feedback information, dispatches etc. based on the high feedback information of correctness, so can improve the communication quality of mobile station apparatus 100 and base station apparatus 200.In addition,, can cover the bigger excursion of CQI, even and also can show to the different significantly scope of communication quality and reference block with identical bit number by using the relative value of the communication quality between the adjacent block.
In addition, in mobile station apparatus 100, be provided with: reference block decision unit 140, select the best piece of the communication quality SINR of incoming level (for example, as) as described reference block.
Thus, can select to have the piece of the communication quality of high reliability.Then, the feedback information of the absolute value of the communication quality by will having comprised this reference block sends to base station apparatus 200,200 pairs of feedback informations of base station apparatus carry out conversion and ask the reliability of absolute value of the communication quality of each piece also to be enhanced, thereby can improve the communication quality of mobile station apparatus 100 and base station apparatus 200.
In addition, in mobile station apparatus 100, MCS decision unit 145 is set, its communication quality based on described each piece of being measured by incoming level measuring unit 135 decides the MCS of relevant each piece, relative value calculating part 150 is calculated the relative value of the MCS between the adjacent block, CQI information generating unit 155 generates CQI information according to the relative value of absolute value and the MCS between the described adjacent block of the MCS of reference block.
(execution mode 2)
In execution mode 1, the relative value of MCS is that unit is reported usually with 1MCS.To this, in execution mode 2,, change the report base (step-length) of the relative value of MCS according to the propagation state between base station apparatus (Node-B) and the mobile station apparatus (UE).
As shown in figure 12, the mobile station apparatus 300 of execution mode 2 comprises: step-length decision unit 310, relative value calculating part 320 and CQI information generating unit 330.
Step-length determines unit 310 based on the propagation state between incoming level estimation mobile station apparatus of being measured by incoming level measuring unit 135 300 and the base station apparatus described later 400, and decides the report base (step-length) of the relative value of MCS according to this propagation state.This step-length information is output to relative value calculating part 320.
Relative value calculating part 320 determines unit 140 determined reference blocks and the MCS that determines unit 145 determined each pieces by MCS based on by step-length decision unit 310 determined step-length information by reference block, calculates CQI information.
Particularly, at first, relative value calculating part 320 is temporarily preserved the absolute value of MCS for reference block, calculates and temporary transient relative value of preserving with the MCS of adjacent block for other piece.Then, relative value calculating part 320 is based on step-length information, and the relative value of the MCS of the adjacent block that calculates is carried out conversion.For example, in Figure 13, step-length is 1MCS, and when MCS8 was the MCS of reference block, the MCS of adjacent block was that the relative value under the situation of MCS7 and MCS6 is respectively 1 and 2, but when step-length is made as 2MCS, relative value all is 1, and this value is the relative value of the MCS of the adjacent block after the conversion.Like this by increasing step-length,, also can follow the bigger change of relative value even when being limited for the employed bit number of the relative value of representing MCS.
CQI information generating unit 330 use the MCS between the adjacent block that calculates by relative value calculating part 320 relative value, reference block MCS absolute value, from the reference block information of reference block decision unit 140 and from the step-length information of step-length decision unit 310, generate CQI information.Particularly, become the data structure (with reference to Figure 14) that in CQI information shown in Figure 7, has comprised step-length information.
As shown in figure 15, the base station apparatus 400 of execution mode 2 comprises CQI information analysis unit 410.Because CQI information is structure as described above, is the data structure (Figure 14) that has comprised step-length information in CQI information shown in Figure 7, so this CQI information analysis unit 410 based on this CQI information, calculates the absolute value of MCS to all pieces.Particularly,, be inversely transformed into the relative value before the conversion,, all pieces calculated the absolute value of MCS according to the absolute value of the MCS of relative value before this conversion and reference block based on step-length information.The absolute value of the MCS of each piece is output to scheduling unit 245.
Like this, according to execution mode 2, carrying out being provided with in the mobile station apparatus 300 of multi-carrier communication with base station apparatus 400: incoming level measuring unit 135, based on known signal (from the pilot signal of base station apparatus 400), the communication quality of each piece that measurement is made of a plurality of subcarriers SINR of incoming level (for example, as); Control information sending controling unit 160 will send to base station apparatus 400 based on the feedback information (CQI information) of the communication quality of each piece; Relative value calculating part 320 is calculated the relative value (for example, the relative value of the relative value of SINR, the MCS corresponding with SINR) of the communication quality between the adjacent block according to the communication quality of each piece SINR of incoming level (for example, as); And CQI information generating unit 330, according to the absolute value of the communication quality of reference block (for example, the absolute value of the absolute value of SINR, the MCS corresponding) with SINR and the relative value of the communication quality between the described adjacent block (for example, the relative value of the relative value of SINR, the MCS corresponding), generate feedback information (CQI information) with SINR.
And then, in mobile station apparatus 300, step-length decision unit 310 is set, it based on the described communication quality of measuring (for example, SINR as incoming level), the relative value that determines described communication quality (for example, the relative value of SINR, the relative value of the MCS corresponding) report base (step-length) with SINR, relative value calculating part 320 is calculated the conversion relative value of the relative value of described communication quality being carried out gained after the conversion according to described report base, CQI information generating unit 330 according to the absolute value of the communication quality of described reference block (for example, the absolute value of SINR, the absolute value of the MCS corresponding) with SINR, described conversion relative value (for example, the absolute value of SINR, the conversion relative value of the MCS corresponding) and described report base, generate described feedback information with SINR.
Thus, because can be according to communication quality, change report base adaptively, even so communication conditions that communication quality changes significantly, also can generate the feedback information of the variation that has more correctly reflected communication quality and not increase the amount of information of representing communication quality, thereby can cut down the feedback data amount that is used for, improve the precision of feedback information.Its result in the base station apparatus 400 of receiving feedback information, dispatches etc. based on the high feedback information of correctness, so can improve the communication quality of mobile station apparatus 300 and base station apparatus 400.
(execution mode 3)
In execution mode 1, the relative value of MCS is that unit is reported usually with 1MCS.Relative therewith, in execution mode 3, based on the MCS of the incoming level decision of each piece of the pilot signal that sends by base station apparatus (Node-B), the report base (step-length) of the relative value of decision MCS.
As shown in figure 16, the mobile station apparatus 500 of execution mode 3 comprises: step-length decision unit 510, relative value calculating part 520 and CQI information generating unit 530.
Step-length decision unit 510 is based on the MCS of each piece that is determined by MCS decision unit 145, the report base (step-length) of the relative value of decision MCS.
Particularly, as shown in figure 17, step-length decision unit 510 is from being determined the MCS of each piece that unit 145 determines the piece of determining to have the piece of maximum MCS and having minimum MCS by MCS.In addition, mobile station apparatus 500 piece that will have the piece of maximum MCS in the absolute value mode and have a minimum MCS reports to base station apparatus described later 600 as reference block.Then, poor (minimax MCS scope) between the piece of maximum and the minimum piece is divided into the bit number prepared for the correlation of the MCS that represents adjacent block the scope of the quantity that can show.Scope after this is cut apart is the step-length of present embodiment.That is to say, step-length decision unit 510 minimax MCS scope is divided into the bit number prepared for the correlation of the MCS that represents adjacent block the quantity that can show, calculate step-length.In the figure, owing to the bit number of preparing for the correlation of the MCS that represents adjacent block is 2, the quantity that can show is 4, and minimax MCS scope is 8, so step-length is 2MCS.In addition,, the situation that makes the step-length equalization has been described, but has been not limited thereto, also can cut apart unequally at this.Particularly, by being that the high scope of level of MCS is cut apart meticulously and the low scope of the level of MCS is cut apart significantly to the incoming level height, so can the higher scope of reliability of the measured value of incoming level correctly be showed, thereby can improve the precision of CQI information.
The MCS of the reference block that relative value calculating part 520 is determined based on the step-length information that is determined by step-length decision unit 510, by reference block decision unit 140 and each piece of being determined by MCS decision unit 145 calculates CQI information.
Particularly, at first, relative value calculating part 520 is temporarily preserved the absolute value of MCS for reference block, calculates and temporary transient relative value of preserving with the MCS of adjacent block for other piece.Then, relative value calculating part 520 is based on step-length information, and the relative value of the MCS of the adjacent block that calculates is carried out conversion.
CQI information generating unit 530 use the MCS between the adjacent block that calculates by relative value calculating part 520 relative value, reference block MCS absolute value, from the reference block information of reference block decision unit 140 and from the step-length information of step-length decision unit 510, generate CQI information.Particularly, become the data structure (Figure 14) that in CQI information shown in Figure 7, comprises step-length information.
As shown in figure 18, the base station apparatus 600 of execution mode 3 comprises CQI information analysis unit 610.Because CQI information is structure as described above, is the data structure (Figure 14) that has comprised step-length information in CQI information shown in Figure 7, so this CQI information analysis unit 610 based on this CQI information, calculates the absolute value of MCS to all pieces.Particularly,, be inversely transformed into the relative value before the conversion,, all pieces calculated the absolute value of MCS according to the absolute value of the MCS of relative value before this conversion and reference block based on step-length information.The absolute value of the MCS of each piece is output to scheduling unit 245.
Like this, according to execution mode 3, carrying out being provided with in the mobile station apparatus 500 of multi-carrier communication with base station apparatus 600: incoming level measuring unit 135, based on known signal (from the pilot signal of base station apparatus 600), the communication quality of each piece that measurement is made of a plurality of subcarriers SINR of incoming level (for example, as); Control information sending controling unit 160 will send to base station apparatus 600 based on the feedback information (CQI information) of the communication quality of each piece; Relative value calculating part 520 is calculated the relative value (for example, the relative value of the relative value of SINR, the MCS corresponding with SINR) of the communication quality between the adjacent block according to the communication quality of each piece SINR of incoming level (for example, as); And CQI information generating unit 530, according to the absolute value of the communication quality of reference block (for example, the absolute value of the absolute value of SINR, the MCS corresponding) with SINR and the relative value of the communication quality between the described adjacent block (for example, the relative value of the relative value of SINR, the MCS corresponding), generate feedback information (CQI information) with SINR.
And then be provided with in mobile station apparatus 500: MCS determines unit 145, based on the communication quality (for example) of described each piece of measuring as the SINR of incoming level, and the MCS of relevant each piece of decision; And step-length decision unit 510, based on by maximum MCS among the MCS decision unit 145 determined MCS and the width of minimum MCS, and the bit number that is used for representing the relative value of the communication quality between the described adjacent block of described feedback information, the relative value that determines described communication quality (for example, the relative value of the MCS corresponding) report base (step-length) with SINR, relative value calculating part 520 is calculated the conversion relative value of the relative value of described communication quality being carried out gained after the conversion according to described report base, CQI information generating unit 530 according to the absolute value of the communication quality of described reference block (for example, the absolute value of the MCS corresponding) with SINR, described conversion relative value (for example, the conversion relative value of the MCS corresponding) and described report base, generate described feedback information with SINR.
Thus, because can be according to communication quality, change report base adaptively, even so communication conditions that communication quality changes significantly, also can generate the feedback information of the variation that has more correctly reflected communication quality and not increase the amount of information of representing communication quality, thereby can cut down the feedback data amount that is used for, improve the precision of feedback information.Its result in the base station apparatus 600 of receiving feedback information, dispatches etc. based on the high feedback information of correctness, so can improve the communication quality of mobile station apparatus 500 and base station apparatus 600.
(other execution modes)
In execution mode 1 to 3, mainly illustrated and selected the situation of the best piece of communication quality, but be not limited thereto as reference block, for example, also the piece of close all MCS of the mean value of the MCS of pieces can be determined as reference block.In addition, also selection reference piece randomly perhaps comes the selection reference piece according to certain certain pattern (pattern).In addition, it is also passable that the Report mode of the reference block that differs from one another between each travelling carriage is indicated in the base station.
Industrial utilizability
Mobile station apparatus of the present invention and base station apparatus carry out the multi-carrier communication of ofdm communication etc., and it makes the precision of feedback information not descend as cutting down the data volume that is used for feedback simultaneously, thereby the device that improves communication quality is extremely useful.
Claims (14)
1. mobile station apparatus comprises:
Computing unit by the sub-carrier group that constitutes at the continuous a plurality of subcarriers of frequency domain, calculates the CQI value that is used to represent communication quality to each;
Generation unit from the described CQI value that calculates, generates feedback information; And
Transmitting element sends described feedback information, wherein,
Described computing unit as benchmark, calculates the CQI difference value as the difference value of the described CQI value of each described sub-carrier group with a CQI value of the communication quality that reflected all described sub-carrier groups,
Described generation unit will be configured in the beginning of serial data as a described CQI value of benchmark, then dispose described CQI difference value successively, generate described feedback information from the described sub-carrier group of frequency maximum or frequency minimum along pairing each the described sub-carrier group of frequency direction.
2. mobile station apparatus as claimed in claim 1, wherein,
Described transmitting element sends a described CQI value of the communication quality that has reflected all described sub-carrier groups as absolute value.
3. as claim 1 or the described mobile station apparatus of claim 2, wherein,
Described computing unit is cut apart the scope step-length according to the rules of obtainable described difference value, and according to described step-length, with the value of the described difference value gained of conversion as described CQI difference value.
4. as claim 1 or the described mobile station apparatus of claim 2, wherein,
Also comprise: receiving element receives the transmission data of using described sub-carrier group to send.
5. as claim 1 or the described mobile station apparatus of claim 2, wherein,
Described CQI value representation MCS.
6. base station apparatus comprises:
Transmitting element uses described sub-carrier group, sends to claim 1 any described mobile station apparatus to the claim 5 with sending data; And
Receiving element receives the feedback information that sends from described mobile station apparatus.
7. base station apparatus comprises:
Transmitting element uses a plurality ofly by the sub-carrier group that constitutes at the continuous a plurality of subcarriers of frequency domain, will send data and send to mobile station apparatus; And
Receiving element, receiving feedback information, described feedback information is in described mobile station apparatus, after a CQI value as benchmark, then dispose the feedback information from the described sub-carrier group of frequency maximum or frequency minimum along the CQI difference value of pairing each the described sub-carrier group of frequency direction successively, described CQI difference value is the CQI difference value as the difference value of the CQI value of each described sub-carrier group that benchmark calculates for the described CQI value with the communication quality that reflected all described sub-carrier groups.
8. base station apparatus as claimed in claim 7, wherein,
Described receiving element receives a described CQI value of the communication quality that has reflected all described sub-carrier groups as absolute value.
9. as claim 7 or the described base station apparatus of claim 8, wherein,
Described CQI difference value is the scope step-length according to the rules of obtainable described difference value to be cut apart and according to the value of the described difference value gained of described step-length conversion.
10. as claim 7 or the described base station apparatus of claim 8, wherein,
Also comprise: scheduling unit, the described feedback information according to receiving carries out the scheduling of described transmission data.
11. base station apparatus as claimed in claim 10, wherein,
Described scheduling unit determines the MCS of described transmission data according to the described feedback information that receives.
12. as claim 7 or the described base station apparatus of claim 8, wherein,
Described CQI value representation MCS.
13. a communication means comprises:
Calculation procedure by the sub-carrier group that constitutes at the continuous a plurality of subcarriers of frequency domain, is calculated the CQI value that is used to represent communication quality to each;
Generate step,, generate feedback information from the described CQI value that calculates; And
Forwarding step sends described CQI value, wherein,
A CQI value with the communication quality that reflected all described sub-carrier groups in the described calculation procedure is a benchmark, calculates the CQI difference value as the difference value of the described CQI value of each described sub-carrier group,
To be configured in the beginning of serial data as a described CQI value of benchmark in the described generation step, then dispose described CQI difference value successively, generate described feedback information from the described sub-carrier group of frequency maximum or frequency minimum along pairing each the described sub-carrier group of frequency direction.
14. a communication means comprises:
Forwarding step uses by, a plurality of sub-carrier groups that constitute at the continuous a plurality of subcarriers of frequency domain, will send data and send to mobile station apparatus; And
Receiving step, receiving feedback information, described feedback information is in described mobile station apparatus, after a CQI value as benchmark, then dispose the feedback information from the described sub-carrier group of frequency maximum or frequency minimum along the CQI difference value of pairing each the described sub-carrier group of frequency direction successively, described CQI difference value is the CQI difference value as the difference value of the CQI value of each described sub-carrier group that benchmark calculates for the described CQI value with the communication quality that reflected all described sub-carrier groups.
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| CN103688482A (en) * | 2013-09-06 | 2014-03-26 | 华为技术有限公司 | A data transmission method, an apparatus and a device |
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| CN109803309A (en) * | 2017-11-17 | 2019-05-24 | 华为技术有限公司 | Communication means and device |
| CN111357312A (en) * | 2017-11-17 | 2020-06-30 | 华为技术有限公司 | Communication method and device |
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