CN101534178B - Uplink/downlink retransmission method based on time division duplex system in wireless communication and system thereof - Google Patents
Uplink/downlink retransmission method based on time division duplex system in wireless communication and system thereof Download PDFInfo
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Abstract
The invention discloses an uplink/downlink data retransmission method and a system thereof. In the downlink data retransmission method, the mapping relationship between three uplink physical frames of an uplink transmission block and three downlink physical frames of a downlink transmission block is configured in advance; a base station uses the downlink physical frame of the downlink transmission block to send one or a plurality of data sub-packets to one or a plurality of terminals; the terminal demodulates the data sub-packets received; based on demodulation results, the terminal sends a reply message used for indicating whether the data sub-packets are successfully demodulated through the corresponding uplink physical frame among the three uplink physical frames of the uplink transmission block after the downlink transmission block; the base station demodulates the reply message and judges whether the data sub-packets are successfully demodulated according to the reply message; and for the data sub-packets unsuccessfully demodulated, the base station sends the retransmitted data sub-packets through the corresponding downlink physical frame in next downlink transmission block.
Description
Technical field
The present invention relates to wireless communication system, particularly, relate to uplink/downlink retransmission method and system based on radio communication time division duplex (Time Division Duplex is referred to as TDD) system.
Background technology
Carrying out as unit in the wireless system of transfer of data take superframe (superframe), the Uplink/Downlink of radio open transmission generally carries out the transmission of data take superframe as unit; Each superframe is comprised of a preamble (leading) and several PHY Frame (physical frame); Preamble and PHY Frame are comprised of for base unit OFDM (OrthogonalFrequency Division Multiplexing, OFDM) Symbol (symbol).
Present UMB (Ultra Mobile Broadband, super mobile broadband), LTE (Long-Term Evolution, Long Term Evolution), Wimax (WorldwideInteroperability for Microwave Access, micro-wave access to global intercommunication) there are two kinds of duplex modes in system, namely, FDD (Frequency Division Duplex, Frequency Division Duplexing (FDD) mode) and TDD (Time Division Duplex, time division duplex) mode.
The FDD mode is that Uplink/Downlink adopts different frequency band transmission, and like this, the resource of the PHY Frames of system's up/down row is distributed relatively independent.
The TDD mode is that Uplink/Downlink uses identical frequency range timesharing to transmit, and this mode need to be divided into PHY frame the uplink and downlink timesharing and transmit.
Under the TDD3:5 mode, uplink/downlink PHY frame generally can transmit according to following mode: base station and terminal are carried out transfer of data take superframe as unit, in the duration of a superframe, the base station at first sends leading to terminal, then the downstream transmission blocks that forms by 3 continuous downstream physical frame sends downlink data to terminal, afterwards, base station and terminal do not send data on very first time interval, next, the upstream data that the uplink transmission block that the base station receiving terminal forms by 5 continuous ascending physical signal frames sends, afterwards, base station and terminal do not send data on second time interval, then, the base station sends downlink data by another downstream transmission blocks that 3 continuous downstream physical frame form to terminal again, and then, base station and terminal do not send data on the 3rd time interval, then, the base station upstream data that sends of another uplink transmission block of forming by 5 continuous ascending physical signal frames of receiving terminal again; On the 4th time interval, base station and terminal do not send data, then the base station sends downlink data by another downstream transmission blocks that 3 continuous downstream physical frame form to terminal again, base station and terminal do not send data on the 5th time interval, then, the base station upstream data that sends of another uplink transmission block of forming by 5 continuous ascending physical signal frames of receiving terminal again.
The present inventor finds in implementation process, in the upstream or downstream data transfer method under the above-mentioned TDD3:5 mode, all do not provide the re-transmission solution of upstream data or downlink data, and want the correct sending and receiving of finishing data, retransmission mechanism is obvious and requisite.Therefore, need a kind of technical scheme that can remedy this defective.
Summary of the invention
Considering needs a kind of problem of data re-transmission mechanism in the data upstream transmission under the TDD3:5 mode that exists in the correlation technique or the downlink transmission process and proposes the present invention, for this reason, the present invention aims to provide a kind of uplink retransmission method and system based on tdd systems, and a kind of downlink retransmission method based on tdd systems and system are provided, remedy the defects in the correlation technique to realize a kind of retransmission mechanism.
According to an aspect of the present invention, a kind of downlink retransmission method based on time division duplex system in wireless communication is provided, above-mentioned time division duplex system in wireless communication is used for downlink transfer based on the downstream transmission blocks that will comprise 3 continuous downstream physical frame, will comprise that the uplink transmission block of 5 continuous ascending physical signal frames is used for the time division duplex of uplink.
Downlink retransmission method according to the embodiment of the invention comprises following processing: set in advance the mapping relations of ascending physical signal frame and downstream physical frame, so that 3 downstream physical frame in the downstream transmission blocks are corresponding one by one with wherein 3 physical frames in the uplink transmission block; The base station uses the downstream physical frame of downstream transmission blocks to send one or more data sub-packets to one or more terminals; The data sub-packets that the terminal demodulation receives; Based on demodulation result, the uplink transmission block of terminal after downstream transmission blocks wherein 3 ascending physical signal frames in corresponding ascending physical signal frame send be used for expression whether successful demodulation the response message of data sub-packets; Base station demodulation response message, and whether demodulation is successful to judge data sub-packets according to response message, for the data sub-packets of demodulation failure, base station corresponding downstream physical frame in next downstream transmission blocks sends the data retransmission attached bag.
Wherein, 3 ascending physical signal frames in centre that above-mentioned 3 ascending physical signal frames are uplink transmission block, above-mentioned mapping relations are: 3 the ascending physical signal frames in the centre of uplink transmission block are corresponding one by one according to the position sequencing with 3 downstream physical frame of downstream transmission blocks.
Wherein, in said method, set in advance retransmission threshold value, and the transmission times in the data sub-packets of demodulation failure reaches in the situation of retransmission threshold value, and the base station no longer retransmits, wherein, the data retransmission attached bag that sends for the n time is n level data retransmission attached bag, wherein, n＜=N, N are retransmission threshold value.
In addition, for the data sub-packets of demodulation success, base station corresponding downstream physical frame in next downstream transmission blocks sends other data sub-packets.
Wherein, the position of corresponding downstream physical frame above-mentioned in next downstream transmission blocks and the position consistency of downstream physical frame in downstream transmission blocks that sends data sub-packets.
According to a further aspect in the invention, a kind of descending retransmission system based on time division duplex system in wireless communication is provided, time division duplex system in wireless communication comprises base station and one or more terminal, and be used for downlink transfer based on the downstream transmission blocks that will comprise 3 continuous downstream physical frame, will comprise that the uplink transmission block of 5 continuous ascending physical signal frames is used for the time division duplex of uplink.
In the descending retransmission system based on time division duplex system in wireless communication according to the embodiment of the invention, the base station comprises: the downlink transfer unit is used for using the downstream physical frame of downstream transmission blocks to send one or more data sub-packets to one or more terminals; The response message demodulating unit is used for receiving the also response message of demodulation terminal transmission, and whether demodulation is successful to judge data sub-packets according to response message; Retransmission unit, the corresponding downstream physical frame that is used for next downstream transmission blocks of use sends the data retransmission attached bag of the data sub-packets of demodulation failure; Terminal comprises: demodulating unit is used for the data sub-packets that the demodulation terminal receives; The uplink unit, be used for corresponding ascending physical signal frame at wherein 3 ascending physical signal frames of uplink transmission block send to the base station be used for expression whether successful demodulation the response message of data sub-packets, wherein, above-mentioned corresponding ascending physical signal frame is the ascending physical signal frame of determining according to preset mapping relation, preset mapping relation is: wherein 3 ascending physical signal frames of uplink transmission block are corresponding one by one according to the position sequencing with 3 downstream physical frame of downstream transmission blocks, wherein, wherein 33 ascending physical signal frames in centre that the ascending physical signal frame is uplink transmission block of uplink transmission block.
Wherein, the base station further comprises: the retransmission threshold value setting unit, be used for arranging retransmission threshold value, and the transmission times in the data sub-packets of demodulation failure reaches in the situation of retransmission threshold value, no longer retransmits, wherein, the data retransmission attached bag that sends for the n time is n level data retransmission attached bag, wherein, n＜=N, N are retransmission threshold value.
Wherein, the position of the corresponding downstream physical frame of retransmission unit use in next downstream transmission blocks and the position consistency of downstream physical frame in downstream transmission blocks of downlink transfer unit use.
According to a further aspect in the invention, a kind of uplink retransmission method based on time division duplex system in wireless communication is provided, above-mentioned time division duplex system in wireless communication is used for downlink transfer based on the downstream transmission blocks that will comprise 3 continuous downstream physical frame, will comprise that the uplink transmission block of 5 continuous ascending physical signal frames is used for the time division duplex of uplink.
Uplink retransmission method according to the embodiment of the invention comprises following processing: set in advance the mapping relations of ascending physical signal frame and downstream physical frame, so that 3 downstream physical frame are corresponding one by one with the continuous ascending physical signal frame of an ascending physical signal frame or two respectively; One or more terminals use the ascending physical signal frame of uplink transmission block to send one or more data sub-packets to the base station; The data sub-packets of the ascending physical signal frame that the base station demodulation receives; Based on demodulation result and mapping relations, the corresponding downstream physical frame of the downstream transmission blocks of base station after uplink transmission block send be used for expression whether successful demodulation the response message of data sub-packets; Terminal demodulation response message, and whether demodulation is successful to judge data sub-packets according to response message, for the ascending physical signal frame of data sub-packets demodulation failure, terminal corresponding ascending physical signal frame in next uplink transmission block sends the data retransmission attached bag of the data sub-packets of demodulation failure.
In said method, for two continuous ascending physical signal frames corresponding to same downstream physical frame, any that terminal can be in two continuous ascending physical signal frames or two ascending physical signal frames send data sub-packets.
Wherein, above-mentioned mapping relations are: 5 the continuous ascending physical signal frames in the uplink transmission block are divided into 3 ascending physical signal frame groups according to the position sequencing, one of them ascending physical signal frame group comprises an ascending physical signal frame, two other ascending physical signal frame group comprises respectively two adjacent ascending physical signal frames, and each ascending physical signal frame group is corresponding one by one according to sequencing in position with 3 the continuous downstream physical frame in the downstream transmission blocks.
Wherein, first and second ascending physical signal frames in the uplink transmission block consist of an ascending physical signal frame group, and third and fourth ascending physical signal frame consists of an ascending physical signal frame group, and the 5th ascending physical signal frame consists of an ascending physical signal frame group; Perhaps, first ascending physical signal frame in the uplink transmission block consists of an ascending physical signal frame group, and second and the 3rd ascending physical signal frame consists of an ascending physical signal frame group, and the 4th and the 5th ascending physical signal frame consists of an ascending physical signal frame group; Perhaps, first and second ascending physical signal frames in the uplink transmission block consist of an ascending physical signal frame group, and the 3rd ascending physical signal frame consists of an ascending physical signal frame group, and the 4th and the 5th ascending physical signal frame consists of an ascending physical signal frame group.
In addition, said method further comprises: for the ascending physical signal frame of data sub-packets demodulation success, terminal corresponding ascending physical signal frame in next uplink transmission block sends other data sub-packets.
Preferably, said method further comprises: set in advance retransmission threshold value, and the number of retransmissions in the data sub-packets of demodulation failure reaches in the situation of retransmission threshold value, no longer retransmit, wherein, the data retransmission attached bag that terminal sends for the n time is n level data retransmission attached bag, wherein, n＜=N, N are retransmission threshold value.
Wherein, the operation of above-mentioned terminal data retransmission attached bag of the data sub-packets of corresponding ascending physical signal frame transmission demodulation failure in next uplink transmission block is specially: terminal is according to the position of ascending physical signal frame corresponding to above-mentioned mapping relations definite response message; According to the position of determining, terminal is determined the corresponding ascending physical signal frame in next uplink transmission block, wherein, and the position of above-mentioned corresponding ascending physical signal frame group in next uplink transmission block and the position consistency of determining; Terminal sends retransmission data packet may at corresponding ascending physical signal frame.
According to a further aspect in the invention, a kind of uplink retransmission system based on time division duplex system in wireless communication is provided, above-mentioned time division duplex system in wireless communication is used for downlink transfer based on the downstream transmission blocks that will comprise 3 continuous downstream physical frame, will comprise that the uplink transmission block of 5 continuous ascending physical signal frames is used for the time division duplex of uplink.This descending retransmission system comprises a base station and one or more terminal.
In the uplink retransmission system according to the embodiment of the invention, terminal comprises: the uplink unit is used for using the ascending physical signal frame of uplink transmission block to send one or more data sub-packets to the base station; The response message demodulating unit is used for receiving the also response message of demodulation base station transmission, and whether demodulation is successful to judge data sub-packets according to response message; Retransmission unit is for the data retransmission attached bag that sends the data sub-packets of demodulation failure at the corresponding ascending physical signal frame of next uplink transmission block; The base station comprises: demodulating unit is used for the data sub-packets of the ascending physical signal frame that the demodulation base station receives; The downlink transfer unit, be used for the corresponding downstream physical frame of downstream transmission blocks to terminal send be used for expression whether successful demodulation the response message of data sub-packets, wherein, corresponding downstream physical frame is the corresponding downstream physical frame of the ascending physical signal frame with sending data sub-packets of determining according to predefined mapping relations, and each downstream physical frame corresponds respectively to an ascending physical signal frame or two continuous ascending physical signal frames.
Wherein, mapping relations are: 5 the continuous ascending physical signal frames in the uplink transmission block are divided into 3 ascending physical signal frame groups according to the position sequencing, one of them ascending physical signal frame group comprises an ascending physical signal frame, two other ascending physical signal frame group comprises respectively two adjacent ascending physical signal frames, and each ascending physical signal frame group is corresponding one by one according to sequencing in position with 3 the continuous downstream physical frame in the downstream transmission blocks.
Wherein, the position consistency of ascending physical signal frame in uplink transmission block of the data sub-packets of the position of corresponding ascending physical signal frame in next uplink transmission block and transmission demodulation failure.
By above-mentioned at least one technical scheme provided by the invention, under the TDD3:5 mode, in downlink transfer, reply symbol (response message) by the ascending physical signal frame transmission in the centre, can be so that base station and terminal have the relative sufficient time to resolve from the other side's data or message and carry out subsequent treatment, realized the re-transmission of data, in uplink, by replying symbol in the downstream physical frame transmission corresponding with ascending physical signal frame group, realize equally the re-transmission of data, thereby remedied the defective that lacks a kind of retransmission mechanism in the correlation technique.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of writing, claims and accompanying drawing.
Description of drawings
Accompanying drawing is used to provide a further understanding of the present invention, and consists of the part of specification, is used for together with embodiments of the present invention explaining the present invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the flow chart based on the downlink retransmission method of TDD system according to the embodiment of the invention;
Fig. 2 (a) and Fig. 2 (b) are the schematic diagrames of the example 1 of method shown in Figure 1;
Fig. 3 is the structured flowchart based on the descending retransmission system of TDD system according to the embodiment of the invention;
Fig. 4 is the flow chart based on the uplink retransmission method of TDD system according to the embodiment of the invention;
Fig. 5 (a) and Fig. 5 (b) are the schematic diagrames of the example 2 of method shown in Figure 5;
Fig. 6 is the structured flowchart based on the uplink retransmission system of TDD system according to the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, is not intended to limit the present invention.
Embodiment of the method one
At first, the problem that lacks a kind of retransmission mechanism in the downlink data transmission for the TDD3:5 mode, the embodiment of the invention provides a kind of downlink retransmission method based on wireless communications tdd system, above-mentioned wireless communications tdd system is used for downlink transfer based on the downstream transmission blocks that will comprise 3 continuous downstream physical frame, to comprise that the uplink transmission block of 5 continuous ascending physical signal frames is used for the TDD mode (that is, TDD3:5 mode) of uplink.
Fig. 1 is the flow chart based on the downlink retransmission method of wireless communications tdd system according to the embodiment of the invention.As shown in Figure 1, the method comprises following processing:
Step S102 sets in advance the mapping relations of ascending physical signal frame and downstream physical frame, so that 3 downstream physical frame in the downstream transmission blocks are corresponding one by one according to the position sequencing with wherein 3 physical frames in the uplink transmission block,
Step S104, the base station uses the downstream physical frame of downstream transmission blocks to send one or more data sub-packets to one or more terminals;
Step S106, the data sub-packets that the terminal demodulation receives;
Step S108, based on demodulation result, the corresponding ascending physical signal frame in above-mentioned wherein 3 ascending physical signal frames of the uplink transmission block of terminal after downstream transmission blocks send be used for expression whether successful demodulation the response message of data sub-packets;
Step S110, base station demodulation response message, and whether demodulation is successful to judge data sub-packets according to response message, for the data sub-packets of demodulation failure, base station corresponding downstream physical frame in next downstream transmission blocks sends the data retransmission attached bag.
Below will further describe the details in each step of above-mentioned processing.
In step S102, preferably, 3 ascending physical signal frames in centre that these 3 ascending physical signal frames are uplink transmission block; In the middle of selecting 3 physical frames send response message be because, first ascending physical signal frame and last ascending physical signal frame in the uplink transmission block, the physical frame in the middle of selecting can guarantee that there are relatively many processing times terminal and base station.For example, if select first physical frame to send response message, then can because of the downstream physical frame that sends the downlink data attached bag from the base station too close to and so that terminal have insufficient time to and carry out reply process, if select last physical frame to send response message, although the processing time of terminal is enough, owing to the response message that causes the base station to have insufficient time to according to terminal close to too from the position of next downstream transmission blocks sends or retransmission operation.3 downstream physical frame send response message in the middle of selecting, and then can avoid the problems referred to above.
Certainly, also can select other ascending physical signal frames, all within protection scope of the present invention.For convenience of description, only describe as an example of middle 3 physical frames example below.
In step S104, the original position that data sub-packets sends can be in first downstream transmission blocks of superframe, also can be in second downstream transmission blocks of superframe, and the border of superframe is to the not restriction of HARQ retransmission process of data attached bag.For convenience of description, in this article, with first downlink transfer BOB(beginning of block) transmission from superframe of tentation data attached bag.
In step S108; arbitrary physical frame of 3 ascending physical signal frames in the middle of terminal can be selected according to the predetermined rule of correspondence sends response message; according to the needs of implementing; the different rules of correspondence can be set; as long as the arbitrary physical frame at middle 3 ascending physical signal frames; the present invention is not limited in this respect, all within protection scope of the present invention.
In step S110, for the data sub-packets of demodulation success (ACK), base station corresponding downstream physical frame in next downstream transmission blocks sends other data sub-packets (the HARQ retransmission processing method of other data sub-packets is identical with the processing method of above-described data sub-packets).
Preferably, can set in advance retransmission threshold value (N), and reach in the situation of retransmission threshold value in the transmission times of the uplink extended data sub-packets of demodulation failure, no longer retransmit.For example, can be set to 5 by N.Correspondingly, the data retransmission attached bag that the base station sends for the n time is n level data retransmission attached bag, wherein, and n＜=N.
Example 1
In the unit of transfer of a superframe, the base station sends downlink data by the downstream transmission blocks that 3 continuous downstream physical frame form to terminal.In order to set forth conveniently, the position of these three physical frames is defined as respectively L0, L1, L2, the data sub-packets that sends from these three positions is defined as respectively P0, P1, P2, the data sub-packets of these three diverse locations can be issued a terminal, also can be to issue different terminals.According to above-described mapping relations, F0 is corresponding to R1, and F1 is corresponding to R2, and F2 is corresponding to R3.
The original position that data sub-packets sends can be in first downstream transmission blocks of superframe, also can be in second or the 3rd downstream transmission blocks of superframe, in order to set forth conveniently, the tentation data attached bag begins transmission from first downstream transmission blocks of superframe first.
To send data sub-packets P0 as example, P0 upward sends on the L0 position as shown in Figure 2, that is to say, P0 sends at physical frame F0.
If the correct demodulation P0 of terminal then sends ACK message in the position of R1, as shown in Figure 2, after the base station receives ACK message, then send other data sub-packets P ' 0 in the position of first physical frame of ensuing downstream transmission blocks.The HARQ retransmission processing method of other data sub-packets P ' 0 is identical with data sub-packets P0's.
On the other hand, if terminal does not have correct demodulation P0, then send NACK message in the position of R1, as shown in Figure 3, after the base station received NACK message, then the respective channel resource in first physical frame position of ensuing downstream transmission blocks sent first order data retransmission attached bag R1P0.
If the correct demodulation of terminal after the first order data retransmission attached bag, then send ACK message in the position of R6; After the base station receives ACK message, then send other data sub-packets P ' 0 in the position of first physical frame of ensuing downstream transmission blocks.
On the other hand, if terminal has not had correct demodulation first order data retransmission attached bag then sends NACK message in the position of R6.After the base station received NACK message, then the respective channel resource in first physical frame position of ensuing downstream transmission blocks sent second level data retransmission attached bag R2P0.
In like manner, as long as the correct demodulation downlink data of terminal attached bag then sends ACK message in the physical frame position of correspondence, the base station receives ACK message, just sends other data sub-packets in the physical frame position of correspondence; As long as terminal does not have correct demodulation downlink data attached bag, then send NACK message in the physical frame position of correspondence, the base station receives NACK message, just the respective channel resource in the physical frame position of correspondence needs to send N level data retransmission attached bag, the maximum of N is generally 5, also can be taken as other positive integer.
By that analogy, for P1, P2, the HARQ retransmission processing method of data sub-packets is identical with data sub-packets P0's, only in respectively corresponding second to the 3rd the physical frame position of downstream transmission blocks, respectively corresponding the 3rd to the 4th the physical frame position of uplink transmission block.
Need to prove in addition, the downstream transmission blocks of data sub-packets original transmission is unrestricted in the position of superframe, can be first downstream transmission blocks, also can be second downstream transmission blocks.The border of Superframe is to the not restriction of HARQ retransmission process of data attached bag.
System embodiment one
According to the embodiment of the invention, a kind of descending retransmission system based on time division duplex system in wireless communication is provided, time division duplex system in wireless communication comprises base station and one or more terminal, and be used for downlink transfer based on the downstream transmission blocks that will comprise 3 continuous downstream physical frame, will comprise that the uplink transmission block of 5 continuous ascending physical signal frames is used for the time division duplex of uplink.
As shown in Figure 3, in the descending retransmission system based on time division duplex system in wireless communication according to the embodiment of the invention, the base station comprises: downlink transfer unit 302 is used for using the downstream physical frame of downstream transmission blocks to send one or more data sub-packets to one or more terminals; Response message demodulating unit 304 is used for receiving the also response message of demodulation terminal transmission, and whether demodulation is successful to judge data sub-packets according to response message; Retransmission unit 306, the corresponding downstream physical frame that is used for next downstream transmission blocks of use sends the data retransmission attached bag of the data sub-packets of demodulation failure.
Terminal comprises: demodulating unit 308 is used for the data sub-packets that the demodulation terminal receives; Uplink unit 310, be used for corresponding ascending physical signal frame at wherein 3 ascending physical signal frames of uplink transmission block send to the base station be used for expression whether successful demodulation the response message of data sub-packets, wherein, above-mentioned corresponding ascending physical signal frame is the ascending physical signal frame of determining according to preset mapping relation, and preset mapping relation is: wherein 3 ascending physical signal frames of uplink transmission block are corresponding one by one according to the position sequencing with 3 downstream physical frame of downstream transmission blocks.Preferably, these 3 ascending physical signal frames are 3 physical frames in the fast centre of uplink.
Preferably, the base station further comprises: the retransmission threshold value setting unit, and be used for arranging retransmission threshold value, and reach in the situation of retransmission threshold value in the transmission times of the data sub-packets of demodulation failure, no longer retransmit.Wherein, the position of the corresponding downstream physical frame of retransmission unit use in next downstream transmission blocks and the position consistency of downstream physical frame in downstream transmission blocks of downlink transfer unit use.
Embodiment of the method two
According to the embodiment of the invention, a kind of uplink retransmission method based on wireless communications tdd system is provided, above-mentioned wireless communications tdd system is used for downlink transfer based on the downstream transmission blocks that will comprise 3 continuous downstream physical frame, will comprise that the uplink transmission block of 5 continuous ascending physical signal frames is used for the TDD mode (TDD3:5 mode) of uplink.
As shown in Figure 4, the uplink retransmission method according to the embodiment of the invention comprises following processing:
Step S402, set in advance the mapping relations of ascending physical signal frame and downstream physical frame, so that 3 downstream physical frame are corresponding one by one with the continuous ascending physical signal frame of an ascending physical signal frame or two respectively, for convenience of description, we have introduced the concept of ascending physical signal frame group, an ascending physical signal frame or two continuous ascending physical signal frames that will be corresponding with downstream physical frame be called ascending physical signal frame group, like this, be appreciated that, each ascending physical signal frame group comprises 1 ascending physical signal frame or 2 adjacent ascending physical signal frames, and a uplink transmission block can be divided into 3 ascending physical signal frame groups;
Step S404, one or more terminals use the ascending physical signal frame (group) of uplink transmission block to send one or more data sub-packets to the base station;
Step S406, the data sub-packets of the ascending physical signal frame group that the base station demodulation receives;
Step S408, based on demodulation result and mapping relations, the corresponding downstream physical frame of the downstream transmission blocks of base station after uplink transmission block send be used for expression whether successful demodulation the response message of data sub-packets;
Step S410, terminal receives and the demodulation response message, and whether demodulation is successful to judge data sub-packets according to response message, for the ascending physical signal frame group of data sub-packets demodulation failure, terminal corresponding ascending physical signal frame group in next uplink transmission block sends the data retransmission attached bag of the data sub-packets of demodulation failure.
Below will further describe the details in each step of above-mentioned processing.
(1) step S402
The mapping relations of mentioning in this step are: 5 the continuous ascending physical signal frames in the uplink transmission block are divided into 3 ascending physical signal frame groups according to the position sequencing, one of them ascending physical signal frame group comprises an ascending physical signal frame, two other ascending physical signal frame group comprises respectively two adjacent ascending physical signal frames, each ascending physical signal frame group is corresponding one by one according to sequencing in position with 3 the continuous downstream physical frame in the uplink transmission block, namely, first ascending physical signal frame group in the uplink transmission block is corresponding to first downstream physical frame in the downstream transmission blocks, second ascending physical signal frame group is corresponding to second downstream physical frame in the downstream transmission blocks, and the 3rd ascending physical signal frame group is corresponding to the 3rd downstream physical frame in the downstream transmission blocks.Certainly, also other corresponding relation can be set, the present invention is not limited in this respect.
Wherein, in can be in the following manner any of downstream transmission blocks divides into groups:
(1) first and second ascending physical signal frame consists of an ascending physical signal frame group, and third and fourth ascending physical signal frame consists of an ascending physical signal frame group, and the 5th ascending physical signal frame consists of an ascending physical signal frame group;
(2) first ascending physical signal frame consists of an ascending physical signal frame group, and second and the 3rd ascending physical signal frame consists of an ascending physical signal frame group, and the 4th and the 5th ascending physical signal frame consists of an ascending physical signal frame group;
(3) first and second ascending physical signal frames consist of an ascending physical signal frame group, and the 3rd ascending physical signal frame consists of an ascending physical signal frame group, and the 4th and the 5th ascending physical signal frame consists of an ascending physical signal frame group.
Particularly, each downstream physical frame is corresponding to one or two ascending physical signal frame in the ascending physical signal frame group that has corresponding relation with it.For example, if according to above-mentioned packet mode (3), the 3rd downstream physical frame in the downstream transmission blocks can be corresponding to the 4th ascending physical signal frame in the 3rd the ascending physical signal frame group, also can be corresponding to the 5th ascending physical signal frame in the 3rd the ascending physical signal frame group, also can be corresponding to the 4th and the 5th ascending physical signal frame.
(2) step S404
For example, in the unit of transfer of a superframe, as mentioned above, the uplink transmission block that 5 continuous ascending physical signal frames are formed is divided into 3 groups, that is, and and in these 5 ascending physical signal frames, in order to set forth conveniently, the position of these 3 physical frame groups is defined as respectively L0, L1, L2, simultaneously, terminal by the data sub-packets that 3 ascending physical signal frame group positions send, is defined as respectively P0, P1, P2.The data sub-packets of these 3 diverse locations can send to the base station by a terminal, also can send to the base station by different terminals.The original position that data sub-packets sends can be at first uplink transmission block of superframe, also can be at second uplink transmission block of superframe.
In the present invention, for convenience of description, the tentation data attached bag begins transmission from first uplink transmission block of superframe first, and supposes that 3 positions have all sent data sub-packets, and 3 data attached bags send to the base station by same terminal.
(3) step S406 and step S408
The base station demodulation after this data sub-packets of 3, the corresponding downlink physical frame position on the downstream transmission blocks that forms in ensuing 3 continuous downstream physical frame is sent respectively ACK or NACK message.ACK represents base station success demodulating data, and NACK represents that the base station does not have successful demodulating data.According to the mapping relations that arrange among the step S402, the ACK/NACK message of these 3 diverse locations is distinguished corresponding P0 successively, P1, these 3 different data sub-packets of P2.
(4) step S410
In this step, the terminal operation that corresponding ascending physical signal frame group sends the data retransmission attached bag in next uplink transmission block is specially: terminal is according to the position of ascending physical signal frame group corresponding to mapping relations definite response message (ACK/NACK); According to the position of determining, terminal is determined the corresponding ascending physical signal frame group in next uplink transmission block, wherein, and the corresponding position of ascending physical signal frame group in next uplink and the position consistency of determining; Afterwards, terminal sends retransmission data packet may in corresponding ascending physical signal frame group.
Particularly, terminal is the ACK/NACK message of these 3 diverse locations of demodulation at first, if NACK message, the expression base station does not have successful demodulating data, then terminal sends first order data retransmission attached bag on the respective channel resource of the ascending physical signal frame group position of the upper correspondence of ensuing uplink transmission block (that is, next uplink transmission block).Need to prove, the data sub-packets of data retransmission attached bag and original transmission can be identical, also can be not identical.
In addition, in step S410: for the ascending physical signal frame group of data sub-packets demodulation success, terminal corresponding ascending physical signal frame group in next uplink transmission block sends other data sub-packets.That is, if ACK message, expression base station success demodulating data, then the physical frame groups position of the correspondence of terminal on ensuing uplink transmission block sends other data sub-packets (the HARQ retransmission processing method of other data sub-packets is identical with data sub-packets).
Preferably, in this embodiment, also comprise following processing: set in advance retransmission threshold value, and reach in the situation of retransmission threshold value at the number of retransmissions of the data sub-packets of demodulation failure, no longer retransmit.Wherein, the data retransmission attached bag that terminal sends for the n time is n level data retransmission attached bag, and wherein, n＜=N, N are retransmission threshold value.
Based on foregoing, next, if the correct demodulation in base station after the first order data retransmission attached bag, then corresponding downlink physical frame position sends ACK message on the downstream transmission blocks that ensuing 3 continuous downstream physical frame form; If the base station does not have correct demodulation first order data retransmission attached bag, then corresponding downlink physical frame position sends NACK message on the downstream transmission blocks that ensuing 3 continuous downstream physical frame form.
Afterwards, terminal is the ACK/NACK message of these 3 diverse locations of demodulation respectively, if ACK message, expression base station success demodulating data, then terminal corresponding ascending physical signal frame group position on ensuing uplink transmission block sends other data sub-packets; If NACK message, the expression base station does not still have successful demodulating data, and then the respective channel resource of terminal corresponding ascending physical signal frame group position on above-mentioned ensuing uplink transmission block sends second level data retransmission attached bag.
That is to say, as long as base station correct demodulation downlink data attached bag, just the downlink physical frame position in correspondence sends ACK message, and terminal receives ACK message, just sends other data sub-packets in the ascending physical signal frame group position of correspondence; As long as the base station does not have correct demodulation upstream data attached bag, just the downlink physical frame position in correspondence sends NACK message, terminal receives NACK message, just the respective channel resource in the ascending physical signal frame group position of correspondence sends N level data retransmission attached bag, usually, can with retransmission threshold value N be set to 5, also can be other positive integer.
Example 2
In the unit of transfer of a superframe, according to top dividing mode, the uplink transmission block that 5 continuous ascending physical signal frames are formed is divided into three ascending physical signal frame groups, namely, the 1st and the 2nd ascending physical signal frame are first ascending physical signal frame group, the 3rd ascending physical signal frame is second ascending physical signal frame group, the 4th and the 5th ascending physical signal frame are the 3rd ascending physical signal frame group, terminal uses these three physical frame groups to send upstream data to the base station, for these 3 ascending physical signal frame group position L0, L1, the data sub-packets that L2 sends, be defined as respectively P0, P1, P2, namely, the data sub-packets that sends in first physical frame groups of uplink transmission block is defined as P0, and the data sub-packets of second physical frame groups transmission is defined as P1, and the data sub-packets of the 3rd physical frame groups transmission is defined as P2.Wherein, in this example, the uplink transmission block of data sub-packets original transmission is unrestricted in the position of superframe, can be first uplink transmission block, also can be second uplink transmission block.The border of Superframe is to the not restriction of HARQ retransmission process of data attached bag.
To send data sub-packets P0 as example, P0 is in up first physical frame groups position shown in Fig. 5 (a), and namely R0 or R1 are upper sends, and perhaps strides simultaneously R0 and R1 and sends.
If the correct demodulation P0 in base station then sends ACK message in the position of first physical frame F3 of ensuing downstream transmission blocks.Shown in Fig. 5 (a), after terminal received ACK message, then the respective channel resource in first physical frame groups position (R5/R6) of ensuing uplink transmission block sent other data sub-packets P ' 0; The HARQ retransmission processing method of other data sub-packets P ' 0 is identical with data sub-packets P0.
If the base station does not have correct demodulation P0, then send NACK message in the position of first physical frame of ensuing downstream transmission blocks.Shown in Fig. 5 (b), after terminal received NACK message, then the respective channel resource in first physical frame groups position (R5/R6) of ensuing uplink transmission block sent first order data retransmission attached bag R1P0.
If the correct demodulation in base station first order data retransmission attached bag, then send ACK message in first physical frame position of ensuing downstream transmission blocks; After terminal receives ACK message, then send other data sub-packets P ' 0 in the position of first physical frame groups of ensuing uplink transmission block.
If the base station does not have correct demodulation first order data retransmission attached bag, then send NACK message in first physical frame position of ensuing downstream transmission blocks; After terminal received NACK message, then the respective channel resource in first physical frame groups position of ensuing uplink transmission block sent second level data retransmission attached bag R2P0.
In like manner, as long as base station correct demodulation downlink data attached bag, just the downlink physical frame position in correspondence sends ACK message, and terminal receives ACK message, just sends other data sub-packets in the ascending physical signal frame group position of correspondence; As long as the base station does not have correct demodulation downlink data attached bag, just the downlink physical frame position in correspondence sends NACK message, terminal receives NACK message, just the respective channel resource in the ascending physical signal frame group position of correspondence needs to send N level data retransmission attached bag, usually, can be set to 5 by retransmission threshold value N, also can be other positive integer.
By that analogy, for P1, the HARQ retransmission processing method of P2 data sub-packets is identical with data sub-packets P0's, below is briefly described.
For P1, terminal sends at R2, and referring again to Fig. 5 (a), if the correct demodulation in base station then sends ACK at F4, afterwards, terminal sends data sub-packets P ' 1 at the R7 of next uplink transmission block; The HARQ retransmission processing method of other data sub-packets P ' 1 is identical with data sub-packets P1's; Otherwise, with reference to Fig. 5 (b), if the base station does not have correct demodulation, then send NACK at F4, afterwards, terminal sends first order data retransmission attached bag R1P1 at the R7 of next downstream transmission blocks.
For P2, terminal is at R3, R4 or stride R3 and R4 sends, referring again to Fig. 5 (a), if the correct demodulation in base station, then send ACK at F5, afterwards, terminal is correspondingly at R8, the R9 of next downstream transmission blocks or stride R8 and R9 sends data sub-packets P ' 2; The HARQ retransmission processing method of other data sub-packets P ' 2 is identical with data sub-packets P2's; Otherwise, with reference to Fig. 5 (b), if the base station does not have correct demodulation, then send NACK at F5, afterwards, terminal is at R8, the R9 of next downstream transmission blocks or stride R8 and R9 sends first order data retransmission attached bag R1P2.
System embodiment two
According to a further aspect in the invention, a kind of uplink retransmission system based on wireless communications tdd system is provided, above-mentioned wireless communications tdd system is used for downlink transfer based on the downstream transmission blocks that will comprise 3 continuous downstream physical frame, to comprise that the uplink transmission block of 5 continuous ascending physical signal frames is used for the TDD mode (that is, TDD3:5 mode) of uplink.
This descending retransmission system can comprise a base station and one or more terminal, for convenience of description, a base station and a terminal has been shown among Fig. 6.Wherein, terminal comprises: uplink unit 602, response message demodulating unit 604, retransmission unit 606, the base station comprises: demodulating unit 608, downlink transfer unit 610.
Particularly, uplink unit 602 is used for using the ascending physical signal frame group of uplink transmission block to send one or more data sub-packets to the base station, wherein, each ascending physical signal frame group comprises 1 ascending physical signal frame or 2 adjacent ascending physical signal frames, and a uplink transmission block is divided into 3 ascending physical signal frame groups; Response message demodulating unit 604 is used for receiving the also response message of demodulation base station transmission, and whether demodulation is successful to judge data sub-packets according to response message; Retransmission unit 606 is used for sending in the corresponding ascending physical signal frame group of next uplink transmission block the data retransmission attached bag of the data sub-packets of demodulation failure.
Demodulating unit 608 is connected to uplink unit 602 and retransmission unit 606, is used for the data sub-packets of the ascending physical signal frame group that the demodulation base station receives; Downlink transfer unit 610 can be connected to demodulating unit 608 and response message demodulating unit 604, be used for the corresponding downstream physical frame of downstream transmission blocks to terminal send be used for expression whether successful demodulation the response message of data sub-packets.
Wherein, above-mentioned corresponding downstream physical frame is the corresponding downstream physical frame of the ascending physical signal frame group with sending data sub-packets of determining according to predefined mapping relations, wherein, mapping relations are: 5 the continuous ascending physical signal frames in the uplink transmission block are divided into 3 ascending physical signal frame groups according to the position sequencing, one of them ascending physical signal frame group comprises an ascending physical signal frame, two other ascending physical signal frame group comprises respectively two adjacent ascending physical signal frames, and each ascending physical signal frame group is corresponding one by one according to sequencing in position with 3 the continuous downstream physical frame in the downstream transmission blocks.
Wherein, in can be in the following manner any of uplink transmission block divides into groups:
(1) first and second ascending physical signal frame consists of an ascending physical signal frame group, and third and fourth ascending physical signal frame consists of an ascending physical signal frame group, and the 5th ascending physical signal frame consists of an ascending physical signal frame group;
(2) first ascending physical signal frame consists of an ascending physical signal frame group, and second and the 3rd ascending physical signal frame consists of an ascending physical signal frame group, and the 4th and the 5th ascending physical signal frame consists of an ascending physical signal frame group;
(3) first and second ascending physical signal frames consist of an ascending physical signal frame group, and the 3rd ascending physical signal frame consists of an ascending physical signal frame group, and the 4th and the 5th ascending physical signal frame consists of an ascending physical signal frame group.
Wherein, the position consistency of ascending physical signal frame group in uplink transmission block of the data sub-packets of the above-mentioned position of corresponding ascending physical signal frame group in next uplink transmission block and transmission demodulation failure.
Ins and outs in this system embodiment two can be understood and implement with reference to the technical scheme of above-mentioned embodiment of the method two, for same or analogous content, no longer are repeated in this description at this.
Can find out by top description, the technical scheme that provides by means of embodiment of the method two or system embodiment two, in the transmitting uplink data under the TDD3:5 mode, by making the base station send response message in the downstream physical frame corresponding with ascending physical signal frame group, terminal can retransmit upstream data, thereby can guarantee the accuracy of transmitting uplink data.
As mentioned above, by means of above-mentioned at least one technical scheme that provides by the embodiment of the invention, under the TDD3:5 mode, in downlink transfer, reply symbol (response message) by the ascending physical signal frame transmission in the centre, can be so that base station and terminal have the relative sufficient time to resolve from the other side's data or message and carry out subsequent treatment, realized the re-transmission of data, in uplink, by replying symbol in the downstream physical frame transmission corresponding with ascending physical signal frame group, realize equally the re-transmission of data, thereby remedied the defective that lacks a kind of retransmission mechanism in the correlation technique.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (18)
1. downlink retransmission method based on time division duplex system in wireless communication, described time division duplex system in wireless communication is used for downlink transfer based on the downstream transmission blocks that will comprise 3 continuous downstream physical frame, to comprise that the uplink transmission block of 5 continuous ascending physical signal frames is used for the time division duplex of uplink, it is characterized in that, described method comprises:
Set in advance the mapping relations of ascending physical signal frame and downstream physical frame, so that 3 downstream physical frame in the downstream transmission blocks are corresponding one by one with wherein 3 ascending physical signal frames in the uplink transmission block;
The base station uses the downstream physical frame of described downstream transmission blocks to send one or more data sub-packets to one or more terminals;
The described data sub-packets that described terminal demodulation receives;
Based on demodulation result, corresponding ascending physical signal frame in wherein 3 ascending physical signal frames of the uplink transmission block of described terminal after described downstream transmission blocks send be used for expression whether successful demodulation the response message of described data sub-packets, wherein, described corresponding ascending physical signal frame is the ascending physical signal frame of determining according to preset mapping relation;
The described response message of described base station demodulation, and whether demodulation is successful to judge described data sub-packets according to described response message, for the data sub-packets of demodulation failure, described base station corresponding downstream physical frame in next downstream transmission blocks sends the data retransmission attached bag.
2. method according to claim 1, it is characterized in that, 3 ascending physical signal frames in centre that described 3 ascending physical signal frames are described uplink transmission block, described mapping relations are: 3 the ascending physical signal frames in the centre of described uplink transmission block are corresponding one by one according to the position sequencing with 3 downstream physical frame of described downstream transmission blocks.
3. method according to claim 1 is characterized in that, further comprises:
Set in advance retransmission threshold value, and the transmission times in the described data sub-packets of demodulation failure reaches in the situation of described retransmission threshold value, described base station no longer retransmits, wherein, the described data retransmission attached bag that sends for the n time is n level data retransmission attached bag, wherein, n＜=N, N are described retransmission threshold value.
4. method according to claim 1 is characterized in that, further comprises:
For the data sub-packets of demodulation success, described base station corresponding downstream physical frame in next downstream transmission blocks sends other data sub-packets.
5. each described method in 4 according to claim 1, it is characterized in that the position of corresponding downstream physical frame in described next downstream transmission blocks and the position consistency of described downstream physical frame in described downstream transmission blocks that sends described data sub-packets.
6. descending retransmission system based on time division duplex system in wireless communication, described time division duplex system in wireless communication comprises base station and one or more terminal, and be used for downlink transfer based on the downstream transmission blocks that will comprise 3 continuous downstream physical frame, to comprise that the uplink transmission block of 5 continuous ascending physical signal frames is used for the time division duplex of uplink, it is characterized in that
Described base station comprises:
The downlink transfer unit is used for using the downstream physical frame of downstream transmission blocks to send one or more data sub-packets to one or more terminals;
The response message demodulating unit is used for receiving the also response message of demodulation terminal transmission, and whether demodulation is successful to judge described data sub-packets according to described response message;
Retransmission unit, the corresponding downstream physical frame that is used for next downstream transmission blocks of use sends the data retransmission attached bag of the data sub-packets of demodulation failure;
Described terminal comprises:
Demodulating unit is used for the described data sub-packets that the described terminal of demodulation receives;
The uplink unit, be used for corresponding ascending physical signal frame at wherein 3 ascending physical signal frames of uplink transmission block send to described base station be used for expression whether successful demodulation the described response message of described data sub-packets;
Wherein, described corresponding ascending physical signal frame is the ascending physical signal frame of determining according to preset mapping relation, and described preset mapping relation is: wherein 3 ascending physical signal frames of described uplink transmission block are corresponding one by one according to the position sequencing with 3 downstream physical frame of described downstream transmission blocks.
7. system according to claim 6 is characterized in that, described wherein 33 ascending physical signal frames in centre that the ascending physical signal frame is described uplink transmission block.
8. system according to claim 6 is characterized in that, described base station further comprises:
The retransmission threshold value setting unit, be used for arranging retransmission threshold value, and the transmission times in the described data sub-packets of demodulation failure reaches in the situation of described retransmission threshold value, no longer retransmit, wherein, the described data retransmission attached bag of the n time transmission is n level data retransmission attached bag, wherein, n＜=N, N are described retransmission threshold value.
9. each described method in 8 according to claim 6, it is characterized in that the position of the corresponding downstream physical frame that described retransmission unit is used in described next downstream transmission blocks and the position consistency of described downstream physical frame in described downstream transmission blocks of described downlink transfer unit use.
10. uplink retransmission method based on time division duplex system in wireless communication, described time division duplex system in wireless communication is based on the descending biography that will comprise 3 continuous downstream physical frame
Defeated piece is used for downlink transfer, will comprise that the uplink transmission block of 5 continuous ascending physical signal frames is used for the time division duplex of uplink, it is characterized in that, described method comprises:
Set in advance the mapping relations of ascending physical signal frame and downstream physical frame, so that 3 downstream physical frame are corresponding one by one with the continuous ascending physical signal frame of an ascending physical signal frame or two respectively;
One or more terminals use the ascending physical signal frame of uplink transmission block to send one or more data sub-packets to the base station;
The data sub-packets of the ascending physical signal frame that the demodulation of described base station receives;
Based on demodulation result and described mapping relations, the corresponding downstream physical frame of the downstream transmission blocks of described base station after described uplink transmission block send be used for expression whether successful demodulation the response message of described data sub-packets;
The described response message of described terminal demodulation, and whether demodulation is successful to judge described data sub-packets according to described response message, for the ascending physical signal frame of data sub-packets demodulation failure, described terminal corresponding ascending physical signal frame in next uplink transmission block sends the data retransmission attached bag of the described data sub-packets of demodulation failure.
11. method according to claim 10, it is characterized in that, for two continuous ascending physical signal frames corresponding to same downstream physical frame, described terminal any or two ascending physical signal frames in described two continuous ascending physical signal frames send described data sub-packets.
12. method according to claim 10 is characterized in that, described mapping relations are:
5 continuous ascending physical signal frames in the described uplink transmission block are divided into 3 ascending physical signal frame groups according to the position sequencing, one of them ascending physical signal frame group comprises an ascending physical signal frame, two other ascending physical signal frame group comprises respectively two adjacent ascending physical signal frames, and each ascending physical signal frame group is corresponding one by one according to sequencing in position with 3 the continuous downstream physical frame in the described downstream transmission blocks.
13. method according to claim 12, it is characterized in that, first and second ascending physical signal frames in the described uplink transmission block consist of an ascending physical signal frame group, third and fourth ascending physical signal frame consists of an ascending physical signal frame group, and the 5th ascending physical signal frame consists of an ascending physical signal frame group; Perhaps, first ascending physical signal frame in the described uplink transmission block consists of an ascending physical signal frame group, and second and the 3rd ascending physical signal frame consists of an ascending physical signal frame group, and the 4th and the 5th ascending physical signal frame consists of an ascending physical signal frame group; Perhaps, first and second ascending physical signal frames in the described uplink transmission block consist of an ascending physical signal frame group, and the 3rd ascending physical signal frame consists of an ascending physical signal frame group, and the 4th and the 5th ascending physical signal frame consists of an ascending physical signal frame group.
14. method according to claim 13 is characterized in that, described method further comprises:
For the ascending physical signal frame of data sub-packets demodulation success, described terminal corresponding ascending physical signal frame in next uplink transmission block sends other data sub-packets.
15. method according to claim 13 is characterized in that, described method further comprises:
Set in advance retransmission threshold value, and the number of retransmissions in the described data sub-packets of demodulation failure reaches in the situation of described retransmission threshold value, no longer retransmit, wherein, the described data retransmission attached bag that described terminal sends for the n time is n level data retransmission attached bag, wherein, n＜=N, N are described retransmission threshold value.
16. method according to claim 13 is characterized in that, the operation of described terminal data retransmission attached bag of the described data sub-packets of corresponding ascending physical signal frame transmission demodulation failure in next uplink transmission block is specially:
Described terminal is determined the position of the ascending physical signal frame that described response message is corresponding according to described mapping relations;
According to the described position of determining, described terminal is determined the corresponding ascending physical signal frame in described next uplink transmission block, wherein, and the position of corresponding ascending physical signal frame in described next uplink transmission block and the described position consistency of determining;
Described terminal sends described retransmission data packet may at corresponding ascending physical signal frame.
17. uplink retransmission system based on time division duplex system in wireless communication, described time division duplex system in wireless communication is used for downlink transfer based on the downstream transmission blocks that will comprise 3 continuous downstream physical frame, to comprise that the uplink transmission block of 5 continuous ascending physical signal frames is used for the time division duplex of uplink, described descending retransmission system comprises a base station and one or more terminal, it is characterized in that
Described terminal comprises:
The uplink unit is used for using the ascending physical signal frame of uplink transmission block to send one or more data sub-packets to the base station;
The response message demodulating unit is used for receiving the also response message of demodulation base station transmission, and whether demodulation is successful to judge data sub-packets according to described response message;
Retransmission unit is for the data retransmission attached bag that sends the data sub-packets of demodulation failure at the corresponding ascending physical signal frame of next uplink transmission block;
Described base station comprises:
Demodulating unit is used for the data sub-packets of the ascending physical signal frame that the described base station of demodulation receives;
The downlink transfer unit, be used for the corresponding downstream physical frame of downstream transmission blocks to described terminal send be used for expression whether successful demodulation the response message of described data sub-packets, wherein, described corresponding downstream physical frame is the corresponding downstream physical frame of the ascending physical signal frame with sending described data sub-packets of determining according to predefined mapping relations, and each downstream physical frame corresponds respectively to an ascending physical signal frame or two continuous ascending physical signal frames;
Wherein, the position consistency of described ascending physical signal frame in described uplink transmission block of the described data sub-packets of the position of described corresponding ascending physical signal frame in described next uplink transmission block and transmission demodulation failure.
18. system according to claim 17 is characterized in that, described mapping relations are:
5 continuous ascending physical signal frames in the described uplink transmission block are divided into 3 ascending physical signal frame groups according to the position sequencing, one of them ascending physical signal frame group comprises an ascending physical signal frame, two other ascending physical signal frame group comprises respectively two adjacent ascending physical signal frames, and each ascending physical signal frame group is corresponding one by one according to sequencing in position with 3 the continuous downstream physical frame in the described downstream transmission blocks.
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| PCT/CN2009/070520 WO2009105992A1 (en) | 2008-02-25 | 2009-02-24 | Downlink and uplink retransmission methods based on the wireless communication tdd system |
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| CN1394406A (en) * | 2000-10-21 | 2003-01-29 | 三星电子株式会社 | Data transmitting/receiving method in HARQ data communication system |
| CN1689261A (en) * | 2002-08-13 | 2005-10-26 | 松下电器产业株式会社 | Method of process configuration for multiple HARQ processes |
| CN1930816A (en) * | 2004-03-12 | 2007-03-14 | 三星电子株式会社 | Method for operation of HARQ in a broadband wireless access communication system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1394406A (en) * | 2000-10-21 | 2003-01-29 | 三星电子株式会社 | Data transmitting/receiving method in HARQ data communication system |
| CN1689261A (en) * | 2002-08-13 | 2005-10-26 | 松下电器产业株式会社 | Method of process configuration for multiple HARQ processes |
| CN1930816A (en) * | 2004-03-12 | 2007-03-14 | 三星电子株式会社 | Method for operation of HARQ in a broadband wireless access communication system |
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