CN101043240A - Data transmission control method, transceiver and system - Google Patents
Data transmission control method, transceiver and system Download PDFInfo
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- CN101043240A CN101043240A CNA2006100784989A CN200610078498A CN101043240A CN 101043240 A CN101043240 A CN 101043240A CN A2006100784989 A CNA2006100784989 A CN A2006100784989A CN 200610078498 A CN200610078498 A CN 200610078498A CN 101043240 A CN101043240 A CN 101043240A
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Abstract
The invention relates to mobile communication technology, specially a data transmission control method in MIMO system, receiver and data transmission control system, the problem that simplifying H-ARQ mechanism in current technology and every emission antenna can be controlled at the same time is resolved. Said method includes: receiving end ensures the speed matching relationship of every emission antenna in corresponding TTI and feedback to the sending end; sending end ensures speed matching relationship of every emission antenna in next TTI and executes speed matching. And, the receiving end ensures average modulating mode or modulating mode of every emission antenna and feedback to the sending end; the sending end modulates data which is to be transmitted in next TTI based on the feedback modulating mode. A speed matching and executing module is connected with every emission antenna of said multi antenna receiver.
Description
Technical field
The present invention relates to mobile communication technology, data transfer control method, transceiver and data transfer control system in particularly a kind of MIMO multi-input multi-output system.
Background technology
MIMO (Multi-Input Multi-Output, multiple-input and multiple-output) application of technology in wireless communication system more and more comes into one's own, no matter be that MIMO has its irreplaceable superiority from angle that increases power system capacity or the angle of improving systematic function.In the MIMO technology, in order more effectively to transmit data, need control the data rate of transmitting terminal, this just needs transmitting terminal to know some information of channel by feedback, dynamically adjusts data rate, even adjusts the emission rate of each transmitting antenna.
Simultaneously, the MIMO technology usually again and adaptive coding and modulating (AMC) technology combine, wherein, adaptive coding modulation is meant that receiving terminal feeds back to transmitting terminal with the information of measuring such as channel quality by feedback channel, modes such as chnnel coding that Information Selection such as the channel quality that transmitting terminal provides according to receiving terminal are suitable and modulation, typically as type of coding, code rate, modulation system (QPSK/16QAM etc.), thereby reach the self adaptation of channel and maximize the purpose of transmission rate.Wherein, the control signaling consumption that brings for the information such as channel quality that reduce receiving terminal feedback, general way is typical MCS (the Modulation and Coding Scheme that transmitting terminal is supported, modulation and coded system) make a concordance list and be kept at transmitting terminal and receiving terminal simultaneously, receiving terminal is according to the performance requirement of own receiver, having pre-determined it requires down the needed channel quality of each MCS of reception (typically with SINR (Signal to Interference and Noise Ratio in certain receptivity (as the error rate etc.), Signal Interference and Noise Ratio) characterizes), like this, receiving terminal just can be judged the MCS that it can receive according to the channel quality of actual measurement, and the index of this MCS in described MCS concordance list (CQI, the indication of ChannelQuality Indicator channel quality) fed back to transmitting terminal.
A MCS mapping table commonly used is as shown in table 1, and the MCS mapping table is kept at transmitting terminal and receiving terminal simultaneously.Receiving terminal is calculated SINR according to channel situation, and feedback MCS index gets final product.
Table 1:MCS mapping table
| The MCS index | Spectrum efficiency (Bps/Hz) | Modulation | Encoding rate | Bit is represented |
| 6 | 3 | 16QAM | 3/4 | 100 |
| 5 | 2 | | 1/2 | 110 |
| 4 | 1.5 | QPSK | 3/4 | 010 |
| 3 | 1 | | 1/2 | 011 |
| 2 | 0.5 | | 1/4 | 001 |
| Not 1 (not launching) | 0 | - | - | 000 |
Existing space division multiplexing technological model ground based on MIMO can be divided into following two kinds of structures:
1, single codeword SCW (Single Code Word) pattern
As shown in Figure 1, for SCW, data flow to be sent at first through chnnel coding, interweave and operation such as planisphere mapping, go out (number that M is transmitting antenna) through different transmission antennas transmit respectively for the data flow of M road phase same rate along separate routes then.Receiving terminal calculates the average SINR of all channels, looks into the average MCS of MCS concordance list feedback.At transmitting terminal, as shown in Figure 1, data flow to be launched adopts unified channel encoder, RM (Rate Matching, rate-matched) mode and modulation system, then all data is distributed to each transmitting antenna, launches after handling accordingly.According to the difference of the multi-access mode that system adopted, channel code or channel resources such as frequency or time that the data occupancy of this M transmitting antenna is identical
The feedback quantity of this mode is less, and because the channel encoder that adopts has only one, therefore CRC check is at the data on all transmitting antennas, so H-ARQ mechanism is comparatively simple, in case showing, CRC check makes mistakes, all data when pre-treatment retransmit so, only need an ack/nack signal to get final product.But since feedback the time standby be the average SINR of all channels, so the throughput of system must have loss, can not reach the system gain that adopts MIMO to bring fully.
2, many code words MCW (Multiple Code Word) pattern
As shown in Figure 2, for MCW, data flow to be sent is the data flow of M road and M the corresponding different rates of transmitting antenna at first along separate routes, then respectively through chnnel coding independently, interweave and operation such as planisphere mapping, go out by corresponding transmission antennas transmit respectively at last.Similarly, difference according to the multi-access mode that system adopted, channel code or channel resources such as frequency or time that the data occupancy of this M transmitting antenna is identical, for example, to cdma system, M transmitting antenna uses identical channel code, and to the OFDMA system, M transmitting antenna uses one group of identical subcarrier etc.
MCW has considered the feature of each channel itself, therefore can realize the system gain of MIMO fully.
In adaptive coding and modulating scheme based on space division multiplexing technology mimo system, identical in the SCW pattern owing to each transmitting antenna speed, therefore receiving terminal only need feed back a total CQI information, adaptive coding and modulating under this and the single channel transmitting antenna is similar, but in the MCW pattern, different transmitting antennas adopts different coded modulation schemes, speed is all inequality, so receiving terminal need feed back corresponding C QI information respectively at each transmitting antenna.Because the MCW pattern is carried out dynamic rate controlled at every transmit antennas, therefore the MCW pattern has than SCW pattern more performance, but, because the MCW pattern need be fed back different CQI information respectively at each transmitting antenna, therefore the MCW pattern needs more feedback control signaling expense, and required feedback control information amount is M a times of single transmit antenna situation.
Therefore, MCW has following shortcoming:
1, H-ARQ mechanism more complicated, because the channel encoder of each transmitting antenna is all independently of one another, so need carry out CRC check respectively to each transmitting antenna, need independently ack/nack signal, especially, when when receiving terminal adopts the SIC technology, set order is arranged owing to detect, the signal that elder generation is detected is the data on other transmitting antenna of ability after CRC check is passed through, so at this time H-ARQ mechanism may cause bigger delay;
2, all encode respectively owing on each transmitting antenna, so the channel interleaving degree of depth can be restricted.
Summary of the invention
The invention provides data transfer control method, transceiver and data transfer control system in a kind of multi-input multi-output system, can't when simplifying H-ARQ mechanism, can realize the problem that each transmitting antenna is controlled respectively again to solve in the prior art.
Data transfer control method in a kind of multi-input multi-output system comprises the steps:
A, receiving terminal determine that each transmitting antenna concerns at current Transmission Time Interval TTI rate corresponding matching ratio, and this rate-matched proportionate relationship is fed back to transmitting terminal;
B, transmitting terminal are determined the rate-matched ratio value of each transmitting antenna at next TTI according to described rate-matched proportionate relationship, and according to rate corresponding matching ratio value the data of transmitting on each transmitting antenna are carried out rate-matched respectively.
Comprise simultaneously in the described steps A: receiving terminal determines that transmitting terminal feeds back to transmitting terminal in the average modulation mode that next TTI should adopt;
Comprise simultaneously among the described step B: transmitting terminal adopts the modulation system of receiving terminal feedback to modulate the data of next TTI transmission.
In the described steps A, the average modulation mode that described transmitting terminal should adopt at next TTI is the average modulation mode of the average quality correspondence of all channels of current TTI.
In the described method, utilize emulation to obtain receiving terminal after the rate-matched proportionate relationship of current TTI feedback is launched the end employing in advance, the channel average quality is in the improvement amount of next TTI; And
In the described steps A, the modulation system that described transmitting terminal should adopt at next TTI is the channel average quality of current TTI and the modulation system of corresponding channel quality improvement amount sum correspondence.
Comprise simultaneously in the perhaps described steps A: receiving terminal is determined the modulation system that each transmitting antenna should adopt at next TTI respectively and is fed back to transmitting terminal;
Comprise simultaneously among the described step B: transmitting terminal adopts the modulation system of each transmitting antenna of receiving terminal feedback to modulate the data of corresponding transmitting antenna in next TTI transmission respectively.
In the described steps A, described each transmitting antenna is the modulation system of the channel quality correspondence on each transmitting antenna of current TTI in the modulation system that next TTI should adopt.
In the described method, utilize emulation to get transmitting antenna after the rate-matched proportionate relationship of current TTI feedback is launched the end employing in advance, the channel quality on the transmitting antenna is in the improvement amount of next TTI; And
In the described steps A, described transmitting antenna is the channel quality of this transmitting antenna current TTI and the modulation system of corresponding channel quality improvement amount sum correspondence in the modulation system that next TTI should adopt.
Described rate-matched proportionate relationship is determined according to the average channel quality of relative all transmitting antennas of channel quality of each transmitting antenna.
Described channel quality determines that according to the signal to noise ratio of channel definite method of described rate-matched proportionate relationship is:
Detect the average signal-to-noise ratio of all channels on the signal to noise ratio of each transmitting antenna upper signal channel and all transmitting antennas;
Calculate the signal to noise ratio of each transmitting antenna correspondence and the signal to noise ratio difference of average signal-to-noise ratio respectively;
The signal to noise ratio difference that obtains according to emulation in advance and the mapping relations table of rate-matched proportionate relationship are searched rate corresponding matching ratio relation.
Perhaps, described rate-matched proportionate relationship determines that according to the current channel quality corresponding coding manner of each transmitting antenna encoding rate and rate-matched that coded system adopts are worth inversely proportional relation.
Described rate-matched proportionate relationship be meant the rate-matched ratio value of each transmitting antenna and all transmitting antennas Mean Speed matching ratio value between the multiple relation.
For each group proportionate relationship data in the described mapping relations table are provided with corresponding index information, and:
In the described steps A, receiving terminal is searched near one group of data of current TTI rate corresponding matching ratio relation at described mapping relations table, and the index information with correspondence feeds back to transmitting terminal then;
Among the described step B, transmitting terminal is determined corresponding data according to the described mapping relations table that sets in advance.
For the various combination of described rate-matched proportionate relationship and modulation system is provided with corresponding index information, and: in the described steps A, receiving terminal feeds back to transmitting terminal with the index information of correspondence; Among the described step B, transmitting terminal is determined corresponding rate-matched proportionate relationship and modulation system according to index information.
Among the described step B, transmitting terminal is determined the Mean Speed matching ratio value of each transmitting antenna, calculates the rate-matched ratio value of each transmitting antenna then according to described multiple relation.
In the said method, among the described step B, after transmitting terminal is earlier carried out the first time rate coupling according to Mean Speed matching ratio value to data to be launched, carry out the secondary rate coupling according to each transmitting antenna in the data that the rate-matched ratio value of next TTI transmits on to each transmitting antenna again.
A kind of many antenna receiving-sending letter machines, comprise at least two transmitting antennas, it is characterized in that, be connected with a speed matching and executing module on each transmitting antenna, the rate-matched ratio of the transmitting antenna that connects according to correspondence is carried out rate-matched control to the data of launching on this transmitting antenna.
Also be connected with modulation module and channelization block between each transmitting antenna and the speed matching and executing module, be used for the data on each transmitting antenna are modulated with channelizing and handle;
Each speed matching and executing module connects splitter simultaneously, is used for handling along separate routes the data of launching on each transmitting antenna.
After described splitter, also be connected with the Mean Speed matching and executing module, after according to the Mean Speed matching value of each transmitting antenna data to be sent being carried out the first time rate coupling, carry out the secondary rate coupling by the speed matching and executing module of each transmitting antenna according to the rate corresponding matching value again.
The connecting channel coding module and the first channel interleaving module before the described splitter are used for data are carried out code interleaving.
The described channel coding module and the first channel interleaving module merge setting.
Also be connected with the bit separation module between the described channel coding module and the first channel interleaving module, being used for the data separating behind the coding is systematic bits and detection bit.
Described channel coding module, the first channel interleaving module and bit separation module merge setting.
Also be connected with the second channel interleaving block between the speed matching and executing module of each transmitting antenna and the modulation module, be used for that data are carried out secondary and interweave.
Also be connected with channelization block between each transmitting antenna and the speed matching and executing module, be used for that the data on each transmitting antenna are carried out channelizing and handle;
Each speed matching and executing module connects splitter simultaneously, is used for handling along separate routes the data of launching on each transmitting antenna;
Also be connected with modulation module before the described splitter, be used for data are unified modulation.
Also be connected with channel coding module, bit separation module and channel interleaving module in turn before the described modulation module, be separated into systematic bits and detect bit after being used for data are encoded, interweave then.
Described channel coding module, bit separation module and channel interleaving module merge setting.
Also be connected with the second channel interleaving block between the speed matching and executing module of each transmitting antenna and the channelization block, be used for that data are carried out secondary and interweave.
Described many antenna receiving-sending letter machines also comprise:
The rate-matched detection module is used to detect the rate-matched proportionate relationship of each transmitting antenna;
The feedback Executive Module is used for generating feedback information and transmission according to the rate-matched proportionate relationship of each transmitting antenna.
A kind of data transfer control system comprises that wherein, each transceiver comprises at least two transmitting antennas as the antenna receiving-sending more than first of transmitting terminal letter machine with as second transceiver of receiving terminal,
Be connected with a speed matching and executing module respectively on each transmitting antenna in the described letter of antenna receiving-sending more than first machine, be used for the data execution rate-matched control of rate-matched ratio launching on this transmitting antenna according to the corresponding transmitting antenna of the letter of antenna receiving-sending more than second machine feedback;
The described letter of antenna receiving-sending more than second machine also comprises: rate-matched detection module and feedback Executive Module, described rate-matched detection module detects the rate-matched proportionate relationship of each transmitting antenna, and described feedback Executive Module generates feedback information and sends to the letter of antenna receiving-sending more than first machine according to the rate-matched proportionate relationship of each transmitting antenna.
Beneficial effect of the present invention is as follows:
Technical solution of the present invention and existing SCW scheme are relatively, the present invention has made full use of the channel characteristics of each transmitting antenna correspondence, under unified coding and modulation system, in channel situation many as far as possible punchings on the data flow transmitted on the transmitting antenna preferably, the least possible punching or do not punch even repeat on data flow transmitted on the relatively poor transmitting antenna of channel situation, make and reach unanimity in the input ability of receiving terminal to each transmitting antenna, and keep total transmitted data amount constant, thereby reach the laser propagation effect of MCW, improved transmission quality effectively, direct effect can increase throughput of system exactly.
H-ARQ mechanism of the present invention is similar with the SCW mode, therefore wants much simple; When the mode that adopts similar MCW is fed back the modulation system of each antenna, made full use of channel capacity, improved throughput of system, and under the situation of transmission same quantity of data, the present invention has darker interleave depth.
In a word, technical solution of the present invention adopts the form of SCW, has reached the effect of MCW, has both kept the characteristics of easy control of SCW itself and longer interleave depth, can dynamically dispose the transmitted data amount on each transmitting antenna again according to the situation of channel, the throughput of maximization system.Correspondingly, if modulation and coded system are certain, adopt the solution of the present invention can reach better BLER performance equally.
Description of drawings
Fig. 1 is a single codeword pattern MIMO structure;
Many patterns of code words of Fig. 2 MIMO structure;
Fig. 3 a is a transmitting terminal when carrying out rate-matched between each transmitting antenna, the punch operation schematic diagram that carries out;
Fig. 3 b is a transmitting terminal when carrying out rate-matched between each transmitting antenna, the repeated encoding operation chart of carrying out;
The handling process schematic diagram that Fig. 4 feeds back at receiving terminal for technical scheme of the present invention;
The handling process schematic diagram that Fig. 5 controls according to feedback information at transmitting terminal for technical scheme of the present invention;
Fig. 6 a-d is for realizing a kind of MIMO structural representation of technical scheme of the present invention;
Fig. 7 a-d is for realizing the another kind of MIMO structural representation of technical scheme of the present invention;
Fig. 8, Fig. 9 are respectively the structural representation of the transceiver of realizing control method of the present invention.
Embodiment
First kind of execution mode of the present invention still selected corresponding modulation system according to the average channel quality information of feedback for keeping the H-ARQ mechanism of SCW pattern at transmitting terminal; Can carry out the advantage of respective handling according to the channel of each transmitting antenna for keeping the MCW pattern simultaneously, by the proportionate relationship between current each the transmitting antenna quality of receiving terminal feedback, transmitting terminal carries out independently rate-matched according to the quality of each transmitting antenna to each transmitting antenna, after channel encoder is certain, keep the constant rate of the data volume and the data volume before the coding of final emission.
For convenience of description, at first define following physical quantity:
M is a number of transmit antennas;
I be transmitting antenna sequence number (i=1,2 ..., M);
N
cBe the total number of bits behind the data channel coding;
N
G (i)For each symbol of the modulation system correspondence on a certain antenna with bit number;
Nt
(i)On certain transmitting antenna, need the bit number that sends for reality;
RM
(i)Be the rate-matched ratio value on certain transmitting antenna, determine according to the difference between each transmitting antenna channel quality and feed back to transmitting terminal that by receiving terminal channel quality is good more, RM
(i)It is corresponding that this is high more;
Nr
(i)=Nt
(i)* RM
(i)Be the bit number after each transmitting antenna execution rate-matched;
N
M (i)=(N
R (i))/(N
G (i)) be the symbolic number that each transmitting antenna can bear after modulation, in fact, in mimo system, the N of all transmitting antennas
M (i)All the same;
R=sum (N
R (i))/N
c=sum (N
M (i)* N
G (i))/N
cBe Mean Speed matching ratio, wherein sum
(.)Be summation operation.
Rate-matched has following mode of operation:
If Nr
(i)＜Nt
(i), rate-matched is represented to abandon the part redundant bit to detecting the punch operation of bit so;
If Nr
(i)=Nt
(i), any operation is not carried out in expression so;
If Nr
(i)＞Nt
(i), rate-matched is represented repeated encoding so.
As shown in Figure 3, Fig. 3 a is the punch operation schematic diagram of transmitting terminal when carrying out rate-matched, wherein x1 is a sequence of systematic, x2 is that the first order detects bit sequence, x3 is that bit sequence is detected in the second level, as seen systematic bits does not allow to be perforated, and Fig. 3 b is the repeated encoding operation chart of transmitting terminal when carrying out rate-matched, and visible is carried out repeated encoding to systematic bits and operate.
Like this, than higher channel, can pass some bits more, just can carry out punch operation more,, can pass some bits less, just carry out punch operation less or do not carry out even carry out repetitive operation for the lower channel of signal to noise ratio for signal to noise ratio.Like this given under the situation of unified MCS, the further average transmittability of channel, final BER or BLER performance can improve.The present invention just is being based on such cognition, adjusts the RM on each transmitting antenna
(i), the performance of improvement system.
As shown in Figure 4, the flow chart that Fig. 4 feeds back at a TTI for receiving terminal comprises the steps:
1, receiving terminal detects the SINR of the data flow correspondence on each transmitting antenna
(i)
2, receiving terminal calculating average effective SINR is SINR
Effect
3, receiving terminal calculates SINR respectively to each transmitting antenna
(i)-SINR
Effect
4, receiving terminal is determined the rate-matched ratio adjustment multiple rm of each transmitting antenna
(i)
Here, receiving terminal is according to the performance requirement of own receiver, having pre-determined it requires down the needed channel quality of each MCS of reception (typically with SINR (Signal to Interference and Noise Ratio in certain receptivity (as the error rate etc.), Signal Interference and Noise Ratio) characterizes, be without loss of generality, in the narration afterwards, all be that channel quality characterizes with SINR), this corresponding relation can adopt with the similar mode of table 1 and obtain by emulation.
Simultaneously, receiving terminal also will be determined the rate-matched ratio adjustment multiple rm of each transmitting antenna according to the channel quality difference between the different transmit antennas
(i), same, can obtain a current SINR and average SINR by emulation
EffectDifference value and the rate-matched ratio manipulative indexing table of adjusting multiple rm.Because Mean Speed matching ratio r can be at transmitting terminal by the decision of MCS pattern and packet size, thus do not need feedback, feedback be the adjustment multiple rm of the rate-matched value on each transmitting antenna
(i), correspondingly at the final rate-matched value RM of each transmitting antenna of transmitting terminal
(i)=rm
(i)* r.
Current SINR and average SINR
EffectDifference value and rate-matched ratio adjust in the manipulative indexing table of multiple rm, each can be organized rm value corresponding index is set, will be according to current SINR of each transmitting antenna and average SINR
EffectImmediate one group of rm value index of searching of difference value feed back to reduce feedback quantity.
Simultaneously, different transmit antennas is carried out after the different rates coupling, and the BLER performance can make moderate progress, and is equivalent to the raising of effective SINR, so might improve modulation system, therefore can also simulate in advance each group rm value and transmitting terminal adopt this group rm value later improve SINR value SINR
_ improvementCorresponding relation, then with the SINR of this improvement
_ improvementWith the average effective SINR that carries out before the rate-matched ratio is adjusted
EffectAddition, the SINR value SINR after improving
-post-rm Effect, promptly
Then according to SINR
-post-rm EffectIn the concordance list of modulation system and SINR, obtain corresponding modulation system and feed back to transmitting terminal.
Like this, receiving terminal is according to the channel quality of actual measurement, determine different rate-matched modes according to the difference in quality of interchannel, then according to carrying out the average modulation mode that the adjusted channel characterization amount of rate-matched ratio is judged all transmitting antennas that it can receive, and with this modulation system and accordingly the rate-matched value of each transmitting antenna index (CQI, the indication of Channel Quality Indicator channel quality) in described concordance list feed back to transmitting terminal.
5, receiving terminal feeds back to transmitting terminal with MCS index and one group of rm value index.
At transmitting terminal, because the data on all transmitting antennas are carried out chnnel coding together, and modulation system unanimity, i.e. N
G (i)=N
gSo, can think that this is a kind of SCW mode.But compare with the SCW mode (as shown in Figure 1) of prior art one, at transmitting terminal, the present invention changes original unified mode of carrying out rate-matched into and independently carries out rate-matched on each transmitting antenna, as shown in Figure 5, after transmitting terminal receives feedback information, carry out following processing:
1, transmitting terminal receives the modulation system index and the rm value index-group of feedback;
2, after the unified chnnel coding of data process, transmitting terminal is according to modulation system that feeds back and the average rate-matched ratio r=sum (N of packet size decision
M (i)* N
g)/N
c, a Yin Han condition is that the resource block size and the armed packet size of distributing is known here, i.e. N
M (i)And N
cKnown;
3, then according to the serial number information of transmitting antenna, obtain the data volume Nt that distributes on each transmitting antenna respectively
(i), Nt
(i)=N
R (i)/ RM
(i)
4, calculate the rate-matched value RM of each transmitting antenna respectively
(i)=rm
(i)* r and Nr
(i)=Nt
(i)* RM
(i)
5, according to Nr
(i)And Nt
(i)Between relation determine the rate adaptation operating mode of each transmitting antenna and the data flow of launching on each transmitting antenna carried out rate-matched;
6, the data flow to launching on each transmitting antenna is modulated according to the modulation system of feedback;
7, each transmitting antenna is carried out channelizing and handle the back emission.
Each transmitting antenna is carried out rate-matched RM
(i)The size of value has reflected the quality of channel.Can think that prior art one SCW is special case, i.e. a Nt of the present invention
(i)=N
c/ M, all RM
(i)Be equal to r.Modulate again at last and launch after handling with channelizing.
In the foregoing description, what receiving terminal fed back to transmitting terminal is the average modulation mode of each transmitting antenna, and transmitting terminal adopts the modulation system of receiving terminal feedback to modulate the data of next TTI transmission.Certainly the average modulation mode can be the average modulation mode of the average quality correspondence of all channels of current TTI.For improving control precision, further, the present invention utilizes emulation to obtain receiving terminal after the rate-matched proportionate relationship of current TTI feedback is launched the end employing in advance, and the channel average quality is in the improvement amount of next TTI; And utilize the channel average quality of current TTI and corresponding channel quality improvement amount sum to select corresponding modulation system, comprised the thought that channel status is predicted in fact, therefore the virtual condition of the more approaching next TTI channel of predicted value can improve control precision.
Each transmitting antenna is the modulation system of the channel quality correspondence on each transmitting antenna of current TTI in the modulation system that next TTI should adopt.The transmitting antenna that perhaps also can utilize emulation in advance is after the rate-matched proportionate relationship of current TTI feedback is launched the end employing, and the channel quality on the transmitting antenna is in the improvement amount of next TTI; And according to the channel quality of each transmitting antenna current TTI and the modulation system of corresponding channel quality improvement amount sum selection correspondence.The something in common of this execution mode and MCW mode is each antenna has been adopted different coded systems according to situation separately, and difference is that technical solution of the present invention has adopted identical encoder and interleaver, thereby interleave depth is darker than the MCW mode.
Can use for reference the mode of existing MCS index and feed back, to reduce feedback quantity.For example: each group proportionate relationship data is provided with corresponding index information in the signal to noise ratio difference that obtains for emulation in advance and the mapping relations table of rate-matched proportionate relationship, and receiving terminal is searched near one group of data of current TTI rate corresponding matching ratio relation at described mapping relations table, and the index information with correspondence feeds back to transmitting terminal then; Transmitting terminal is determined corresponding data according to the described mapping relations table that sets in advance.Further, corresponding index information can also be set for the various combination of described rate-matched proportionate relationship and modulation system, and: receiving terminal feeds back to transmitting terminal with the index information of correspondence; Transmitting terminal is determined corresponding rate-matched proportionate relationship and modulation system according to index information again.
Consult Fig. 6 a to 6c, in the another embodiment of the invention, receiving terminal is determined the modulation system that each transmitting antenna should adopt at next TTI respectively and is fed back to transmitting terminal; Transmitting terminal adopts the modulation system of each transmitting antenna of receiving terminal feedback to modulate the data of corresponding transmitting antenna in next TTI transmission respectively, this is a kind of implementation that is similar to common MCW mode, be that with the difference of common MCW mode this implementation has carried out unified Turbo coding to the data on all antennas, so interleave depth can be bigger than common MCW.
If the implementation of above-mentioned similar MCW, receiving terminal can no longer calculate average SINR, but the modulation system of the correspondence by each antenna is determined the coded system that adopt, inversely proportional relation between proportionate relationship between the encoding rate that coded system adopts and the rate-matched value.The simplest, this rate-matched ratio is the inverse ratio of coded system encoding rate, under this mode, can be with reference to table 1, formulate the concordance list of modulation system and respective rate matching ratio, when feedback, the corresponding index value that feeds back in this table can reduce feedback quantity, a kind of form of the concordance list of modulation system and respective rate matching ratio is as shown in table 2 below, and the rate-matched ratio value in the table 2 is identical with the respective coding rate:
The concordance list of table 2. modulation system and respective rate matching ratio
| Index value | Spectrum efficiency (Bps/Hz) | Modulation | Encoding rate | The rate-matched ratio value | Bit is represented |
| 6 | 3 | 16QAM | 3/4 | 4/3 | 100 |
| 5 | 2 | | 1/2 | 2/1 | 110 |
| 4 | 1.5 | QPSK | 3/4 | 4/3 | 010 |
| 3 | 1 | | 1/2 | 2/1 | 011 |
| 2 | 0.5 | | 1/4 | 4/1 | 001 |
| Not 1 (not launching) | 0 | - | - | - | 000 |
After transmitting terminal receives the feedback information of each antenna, at first instead table look-up 2, determine that the modulation system and the rate-matched ratio value that adopt (are RM
(i)Value)
Rate-matched is modulated and carried out to each antenna respectively, process that transmitting terminal is handled and said method basically identical, difference is because each antenna has adopted different modulation systems, so the bit number N that comprises in each symbol of each antenna
G (i)Different, the processing procedure of transmitting terminal is described in detail as follows:
1, transmitting terminal is determined modulation system and RM
(i)Value;
2, after the unified chnnel coding of data process, transmitting terminal is according to modulation system that feeds back and the average rate-matched ratio r=sum (N of packet size decision
M (i)* N
G (i))/N
c, a Yin Han condition is that the resource block size and the armed packet size of distributing is known here, i.e. N
M (i)And N
cKnown;
3, then according to the serial number information of transmitting antenna, obtain the data volume Nt that distributes on each transmitting antenna respectively
(i), Nt here
(i)Be according to N in fact
R (i), RM
(i), N
G (i), N
M (i)Calculate Nt
(i)=N
R (i)/ RM
(i)=N
M (i)* N
G (i)/ RM
(i)
4, according to Nr
(i)And Nt
(i)Between relation determine the rate adaptation operating mode of each transmitting antenna and the data flow of launching on each transmitting antenna carried out rate-matched;
6, the data flow to launching on each transmitting antenna is modulated according to the modulation system of feedback;
7, each transmitting antenna is carried out channelizing and handle the back emission.
Here provided the MIMO structural representation that is applicable to after several improvement of the present invention, shown in Fig. 6 a-d:
Data flow is direct according to the Nt that distributes through the chnnel coding and the back that interweaves among Fig. 6 a
(i)Value is distribute data on each transmitting antenna, carries out rate-matched, modulation and channelizing respectively and handle the back emission on each transmitting antenna;
Fig. 6 b has shown another implementation method, after the unified chnnel coding of data flow process, being divided into sequence of systematic, the first detection bit sequence and the second detection bit sequence according to the data behind the method handle coding of bit separation shown in Fig. 3 a (is without loss of generality, here still be encoded to example with 1/3, coding form then is not limited only to convolution code and Turbo code), three sequences interweave respectively separately, separately according to the method shown in Fig. 6 a data allocations being carried out the speed coupling to each transmitting antenna, modulation and channelizing are handled the back and are sent then.This method is equivalent to the bit separation of rate-matched in Fig. 6 a scheme advanceed to be finished before interweaving.
The data distribution schemes here also has two kinds:
1) all systematic bits mean allocation are to each transmitting antenna;
2) systematic bits is distributed according to certain ratio, this ratio can be determined by the rm value, a concrete deciding means is directly inversely proportional with the rm value, and the system for transmitting bit that promptly channel situation is good is more, and the relatively poor system for transmitting bit of channel situation lacks.Mode 1 is simple relatively, but flexibility is less better.Concrete mode can dynamically be determined, also can fix with a kind of;
Fig. 6 c in order further to improve the input ability, can also once interweave on each transmitting antenna on the scheme basis shown in Fig. 6 a and Fig. 6 b again;
Fig. 6 d has provided another execution mode of Fig. 6 a, be that rate-matched is placed on after the modulation, like this, the object of rate-matched becomes symbols streams after the modulation from bit stream, this is equally applicable to the present invention program's use, and the scheme that the symbols streams to after the modulation of Fig. 6 b and 6c is carried out the rate-matched adjustment is identical.
When carrying out rate-matched, the factors such as position of position of distribution, systematic bits and the inspection bit of systematic bits on each transmitting antenna etc. and punching do not influence concrete enforcement of the present invention.
Consult shown in Fig. 7 a to 7d, among above-mentioned two embodiment, can utilize the Mean Speed matching value to carry out elder generation earlier and carry out the first time rate coupling, and then carry out the first time rate coupling again according to each antenna rate corresponding matching value.
Fig. 7 a to 7d has provided the MIMO structural representation of above-mentioned execution mode, after splitter, also be connected with the Mean Speed matching and executing module, after according to the Mean Speed matching value of each transmitting antenna data to be sent being carried out the first time rate coupling, carry out the secondary rate coupling by the speed matching and executing module of each transmitting antenna according to the rate corresponding matching value again.Compare with Fig. 6 a to 6d, difference is that data flow at first carried out rate-matched according to Mean Speed matching ratio r before shunt, and the data flow after will mate then is according to the relative speed matching ratio rm that feeds back
(i)Data allocations is arrived each antenna, be that the high antenna of signal to noise ratio has more data, can punching fall more check information, then punching is fallen less check information or the systematic bits of some is carried out repetition on the lower antenna of signal to noise ratio, keep the symbol of each antenna emission similar number like this.
As shown in Figure 8, realize a kind of many antenna receiving-sending letter machines of technical scheme of the present invention, comprise at least two transmitting antennas, be connected with a speed matching and executing module on each transmitting antenna, the rate-matched ratio of the transmitting antenna that connects according to correspondence is carried out rate-matched control to the data of launching on this transmitting antenna.The concrete structure of many antenna receiving-sending letter machines is referring to Fig. 6 a-6d.
As shown in Figure 9, another kind of many antenna receiving-sending letter machines comprise at least two transmitting antennas, also comprise:
Rate-matched ratio detection module is used to detect the rate-matched proportionate relationship of each transmitting antenna;
The feedback Executive Module is used for generating feedback information and transmission according to the rate-matched proportionate relationship of each transmitting antenna.
When many antenna receiving-sendings letter machines shown in Figure 8 as transmitting terminal, and transceiver shown in Figure 9 is during as receiving terminal, can unidirectional realization data transfer control method of the present invention.
If realize two-way control, many antenna receiving-sending letter machines comprise simultaneously: speed matching and executing module, rate-matched ratio detection module and feedback Executive Module.
After the corresponding machine of antenna receiving-sending letter more than two is set up Traffic Channel, just formed the data transfer control system of realizing control method of the present invention as transmitting terminal and receiving terminal respectively, each transceiver comprises at least two transmitting antennas, and:
As being connected with a speed matching and executing module respectively on each transmitting antenna in many antenna receiving-sendings letter machine of transmitting terminal, be used for the data execution rate-matched control of rate-matched ratio to launching on this transmitting antenna according to the corresponding transmitting antenna of the letter of antenna receiving-sending more than second machine feedback;
Many antenna receiving-sending letter machines as receiving terminal also comprise: rate-matched detection module and feedback Executive Module, described rate-matched detection module detects the rate-matched proportionate relationship of each transmitting antenna, and described feedback Executive Module generates feedback information and sends to the letter of antenna receiving-sending more than first machine according to the rate-matched proportionate relationship of each transmitting antenna.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (40)
1, the data transfer control method in a kind of multi-input multi-output system is characterized in that, comprises the steps:
A, receiving terminal determine that each transmitting antenna concerns at current Transmission Time Interval TTI rate corresponding matching ratio, and this rate-matched proportionate relationship is fed back to transmitting terminal;
B, transmitting terminal are determined the rate-matched ratio value of each transmitting antenna at next TTI according to described rate-matched proportionate relationship, and according to rate corresponding matching ratio value the data of transmitting on each transmitting antenna are carried out rate-matched respectively.
2, control method as claimed in claim 1 is characterized in that,
Comprise simultaneously in the described steps A: receiving terminal determines that transmitting terminal feeds back to transmitting terminal in the average modulation mode that next TTI should adopt;
Comprise simultaneously among the described step B: transmitting terminal adopts the modulation system of receiving terminal feedback to modulate the data of next TTI transmission.
3, control method as claimed in claim 2 is characterized in that, in the described steps A, the average modulation mode that described transmitting terminal should adopt at next TTI is the average modulation mode of the average quality correspondence of all channels of current TTI.
4, control method as claimed in claim 2 is characterized in that, in the described method, utilizes emulation to obtain receiving terminal after the rate-matched proportionate relationship of current TTI feedback is launched the end employing in advance, and the channel average quality is in the improvement amount of next TTI; And
In the described steps A, the modulation system that described transmitting terminal should adopt at next TTI is the channel average quality of current TTI and the modulation system of corresponding channel quality improvement amount sum correspondence.
5, control method as claimed in claim 1 is characterized in that,
Comprise simultaneously in the described steps A: receiving terminal is determined the modulation system that each transmitting antenna should adopt at next TTI respectively and is fed back to transmitting terminal;
Comprise simultaneously among the described step B: transmitting terminal adopts the modulation system of each transmitting antenna of receiving terminal feedback to modulate the data of corresponding transmitting antenna in next TTI transmission respectively.
6, control method as claimed in claim 5 is characterized in that, in the described steps A, described each transmitting antenna is the modulation system of the channel quality correspondence on each transmitting antenna of current TTI in the modulation system that next TTI should adopt.
7, control method as claimed in claim 5, it is characterized in that, in the described method, utilize emulation to obtain transmitting antenna after the rate-matched proportionate relationship of current TTI feedback is launched the end employing in advance, the channel quality on the transmitting antenna is in the improvement amount of next TTI; And
In the described steps A, described transmitting antenna is the channel quality of this transmitting antenna current TTI and the modulation system of corresponding channel quality improvement amount sum correspondence in the modulation system that next TTI should adopt.
8, as one of any described control method of claim 1-7, it is characterized in that, described rate-matched proportionate relationship determines that according to the current channel quality corresponding coding manner of each transmitting antenna encoding rate and rate-matched that coded system adopts are worth inversely proportional relation.
9, as one of any described control method of claim 1-7, it is characterized in that, described rate-matched proportionate relationship according to the channel quality of each transmitting antenna relatively the average channel quality of all transmitting antennas determine.
10, control method as claimed in claim 8 is characterized in that, described channel quality determines that according to the signal to noise ratio of channel definite method of described rate-matched proportionate relationship is:
Detect the average signal-to-noise ratio of all channels on the signal to noise ratio of each transmitting antenna upper signal channel and all transmitting antennas;
Calculate the signal to noise ratio of each transmitting antenna correspondence and the signal to noise ratio difference of average signal-to-noise ratio respectively;
The signal to noise ratio difference that obtains according to emulation in advance and the mapping relations table of rate-matched proportionate relationship are searched rate corresponding matching ratio relation.
11, control method as claimed in claim 9 is characterized in that, described rate-matched proportionate relationship is meant the multiple relation between the Mean Speed matching ratio value of the rate-matched ratio value of each transmitting antenna and all transmitting antennas.
12, method as claimed in claim 10 is characterized in that, for each group proportionate relationship data in the described mapping relations table are provided with corresponding index information, and:
In the described steps A, receiving terminal is searched near one group of data of current TTI rate corresponding matching ratio relation at described mapping relations table, and the index information with correspondence feeds back to transmitting terminal then;
Among the described step B, transmitting terminal is determined corresponding data according to the described mapping relations table that sets in advance.
13, as claim 2 or 5 described methods, it is characterized in that, for the various combination of described rate-matched proportionate relationship and modulation system is provided with corresponding index information, and:
In the described steps A, receiving terminal feeds back to transmitting terminal with the index information of correspondence;
Among the described step B, transmitting terminal is determined corresponding rate-matched proportionate relationship and modulation system according to index information.
As claim 1,2 or 5 described methods, it is characterized in that 14, among the described step B, transmitting terminal is determined the Mean Speed matching ratio value of each transmitting antenna, calculate the rate-matched ratio value of each transmitting antenna then according to described multiple relation.
15, method as claimed in claim 14, it is characterized in that, among the described step B, after transmitting terminal is earlier carried out the first time rate coupling according to Mean Speed matching ratio value to data to be launched, carry out the secondary rate coupling according to each transmitting antenna in the data that the rate-matched ratio value of next TTI transmits on to each transmitting antenna again.
16, a kind of many antenna receiving-sending letter machines, comprise at least two transmitting antennas, it is characterized in that, be connected with a speed matching and executing module on each transmitting antenna, the rate-matched ratio of the transmitting antenna that connects according to correspondence is carried out rate-matched control to the data of launching on this transmitting antenna.
17, transceiver as claimed in claim 16 is characterized in that,
Also be connected with modulation module and channelization block between each transmitting antenna and the speed matching and executing module, be used for the data on each transmitting antenna are modulated with channelizing and handle;
Each speed matching and executing module connects splitter simultaneously, is used for handling along separate routes the data of launching on each transmitting antenna.
18, transceiver as claimed in claim 17, it is characterized in that, after described splitter, also be connected with the Mean Speed matching and executing module, after according to the Mean Speed matching value of each transmitting antenna data to be sent being carried out the first time rate coupling, carry out the secondary rate coupling by the speed matching and executing module of each transmitting antenna according to the rate corresponding matching value again.
19, transceiver as claimed in claim 16 is characterized in that, the connecting channel coding module and the first channel interleaving module before the described splitter are used for data are carried out code interleaving.
20, transceiver as claimed in claim 17 is characterized in that, the described channel coding module and the first channel interleaving module merge setting.
21, transceiver as claimed in claim 16 is characterized in that, also is connected with the bit separation module between the described channel coding module and the first channel interleaving module, and being used for the data separating behind the coding is systematic bits and detection bit.
22, transceiver as claimed in claim 19 is characterized in that, described channel coding module, the first channel interleaving module and bit separation module merge setting.
23, as one of any described transceiver of claim 16-22, it is characterized in that, also be connected with the second channel interleaving block between the speed matching and executing module of each transmitting antenna and the modulation module, be used for that data are carried out secondary and interweave.
24, transceiver as claimed in claim 16 is characterized in that,
Also be connected with channelization block between each transmitting antenna and the speed matching and executing module, be used for that the data on each transmitting antenna are carried out channelizing and handle;
Each speed matching and executing module connects splitter simultaneously, is used for handling along separate routes the data of launching on each transmitting antenna;
Also be connected with modulation module before the described splitter, be used for data are unified modulation.
25, transceiver as claimed in claim 24, it is characterized in that, also be connected with channel coding module, bit separation module and channel interleaving module in turn before the described modulation module, be separated into systematic bits and detect bit after being used for data are encoded, interweave then.
26, transceiver as claimed in claim 25 is characterized in that, described channel coding module, bit separation module and channel interleaving module merge setting.
27, as claim 24,25 or 26 described transceivers, it is characterized in that, also be connected with the second channel interleaving block between the speed matching and executing module of each transmitting antenna and the channelization block, be used for that data are carried out secondary and interweave.
28, transceiver as claimed in claim 16 is characterized in that, described many antenna receiving-sending letter machines also comprise:
The rate-matched detection module is used to detect the rate-matched proportionate relationship of each transmitting antenna;
The feedback Executive Module is used for generating feedback information and transmission according to the rate-matched proportionate relationship of each transmitting antenna.
29, a kind of data transfer control system comprises that wherein, each transceiver comprises at least two transmitting antennas, it is characterized in that as the antenna receiving-sending more than first of transmitting terminal letter machine with as second transceiver of receiving terminal:
Be connected with a speed matching and executing module respectively on each transmitting antenna in the described letter of antenna receiving-sending more than first machine, be used for the data execution rate-matched control of rate-matched ratio launching on this transmitting antenna according to the corresponding transmitting antenna of the letter of antenna receiving-sending more than second machine feedback;
The described letter of antenna receiving-sending more than second machine also comprises: rate-matched detection module and feedback Executive Module, described rate-matched detection module detects the rate-matched proportionate relationship of each transmitting antenna, and described feedback Executive Module generates feedback information and sends to the letter of antenna receiving-sending more than first machine according to the rate-matched proportionate relationship of each transmitting antenna.
30, system as claimed in claim 29, it is characterized in that, in described first transceiver: also be connected with modulation module and channelization block between each transmitting antenna and the speed matching and executing module, be used for the data on each transmitting antenna are modulated with channelizing and handle;
Each speed matching and executing module connects splitter simultaneously, is used for handling along separate routes the data of launching on each transmitting antenna.
31, transceiver as claimed in claim 30, it is characterized in that, in described first transceiver: after described splitter, also be connected with the Mean Speed matching and executing module, after according to the Mean Speed matching value of each transmitting antenna data to be sent being carried out the first time rate coupling, carry out the secondary rate coupling by the speed matching and executing module of each transmitting antenna according to the rate corresponding matching value again.
32, system as claimed in claim 30 is characterized in that, in described first transceiver: the connecting channel coding module and the first channel interleaving module before the described splitter are used for data are carried out code interleaving.
33, system as claimed in claim 32 is characterized in that, in described first transceiver: the described channel coding module and the first channel interleaving module merge setting.
34, system as claimed in claim 32, it is characterized in that, in described first transceiver: also be connected with the bit separation module between the described channel coding module and the first channel interleaving module, being used for the data separating behind the coding is systematic bits and detection bit.
35, system as claimed in claim 34 is characterized in that, in described first transceiver: described channel coding module, the first channel interleaving module and bit separation module merge setting.
36, as the described system of claim 31-35, it is characterized in that, in described first transceiver: also be connected with the second channel interleaving block between the speed matching and executing module of each transmitting antenna and the modulation module, be used for that data are carried out secondary and interweave.
37, system as claimed in claim 29 is characterized in that, in described first transceiver: also be connected with channelization block between each transmitting antenna and the speed matching and executing module, be used for that the data on each transmitting antenna are carried out channelizing and handle;
Each speed matching and executing module connects splitter simultaneously, is used for handling along separate routes the data of launching on each transmitting antenna;
Also be connected with modulation module before the described splitter, be used for data are unified modulation.
38, system as claimed in claim 37, it is characterized in that, in described first transceiver: also be connected with channel coding module, bit separation module and channel interleaving module before the described modulation module in turn, be separated into systematic bits after being used for data are encoded and detect bit, interweave then.
39, system as claimed in claim 38 is characterized in that, in described first transceiver: described channel coding module, bit separation module and channel interleaving module merge setting.
40, as claim 37,38 or 39 described systems, it is characterized in that, in described first transceiver: also be connected with the second channel interleaving block between the speed matching and executing module of each transmitting antenna and the modulation module, be used for that data are carried out secondary and interweave.
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Cited By (3)
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| WO2013185319A1 (en) * | 2012-06-14 | 2013-12-19 | Qualcomm Incorporated | Joint power control and rate adjustment scheme for voip |
| US9455925B2 (en) | 2009-06-09 | 2016-09-27 | Huawei Technologies Co., Ltd. | Method, device, and system for self-adaptively adjusting data transmission rate |
| CN109792321A (en) * | 2018-12-25 | 2019-05-21 | 北京小米移动软件有限公司 | Data transmission method and device |
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| US6131016A (en) * | 1997-08-27 | 2000-10-10 | At&T Corp | Method and apparatus for enhancing communication reception at a wireless communication terminal |
| US8634481B1 (en) * | 2000-11-16 | 2014-01-21 | Alcatel Lucent | Feedback technique for wireless systems with multiple transmit and receive antennas |
| KR100917882B1 (en) * | 2002-07-10 | 2009-09-16 | 삼성전자주식회사 | Mobile communication apparatus and method having base-station/mobile-station multiantenna |
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| US9455925B2 (en) | 2009-06-09 | 2016-09-27 | Huawei Technologies Co., Ltd. | Method, device, and system for self-adaptively adjusting data transmission rate |
| WO2013185319A1 (en) * | 2012-06-14 | 2013-12-19 | Qualcomm Incorporated | Joint power control and rate adjustment scheme for voip |
| CN109792321A (en) * | 2018-12-25 | 2019-05-21 | 北京小米移动软件有限公司 | Data transmission method and device |
| CN109792321B (en) * | 2018-12-25 | 2021-10-08 | 北京小米移动软件有限公司 | Data transmission method and device |
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