CN101547074B - Uplink transmission/feedback method and uplink transmission/feedback system based on wireless communication time-division duplex (TDD) system - Google Patents
Uplink transmission/feedback method and uplink transmission/feedback system based on wireless communication time-division duplex (TDD) system Download PDFInfo
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Abstract
The invention discloses an uplink transmission/feedback method and an uplink transmission/feedback system of a wireless communication TDD system based on a TDD3:5 mode. The method comprises the following steps that: a terminal uses two or three continuous uplink physical frames of an uplink transmission block to send an uplink extended data subpacket to a base station; the base station demodulates the received uplink extended data subpacket; based on the demodulation result and according to the uplink physical frames used by the terminal and the preset mapping relation of uplink/downlink physical frames, the base station sends a response message used to show whether the uplink extended data subpacket is successfully demodulated in a preset downlink physical frame of a downlink transmission block after the uplink transmission block; the terminal demodulates the response message and judges whether the uplink extended data subpacket is successfully demodulated according to the response message; and the terminal sends and retransmits the uplink extended data subpacket in a corresponding uplink physical frame of the next uplink transmission block if the uplink extended data subpacket is unsuccessfully demodulated. The method and the system realize the transmission and feedback of the uplink extended data subpackets in the TDD3:5 mode.
Description
Technical field
The present invention relates to wireless communication field, particularly, relate to uplink/feedback method and device based on radio communication time division duplex (Time Division Duplex is referred to as TDD) system.
Background technology
To carry out as unit in the wireless system of transfer of data take superframe (superframe), the Uplink/Downlink of radio open transmission generally carries out transfer of data take superframe as unit; Each superframe is comprised of a preamble (leading) and several PHY Frame (physical frame); Preamble and PHY Frame form for base unit with 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, be FDD (Frequency Division Duplex, Frequency Division Duplexing (FDD)) mode and TDD mode.
Under the FDD mode, Uplink/Downlink adopts different frequency band transmission, and like this, the resource of the PHY Frames of the up/down row of system is distributed relatively independent.
Under the TDD mode, Uplink/Downlink uses identical frequency range timesharing to transmit.Under this mode, PHY frames need to be divided into the uplink and downlink timesharing and transmit.
Under the TDD3:5 mode, uplink and downlink PHY frames 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 described terminal, the downstream transmission blocks that forms by 3 continuous downstream physical frame again sends downlink data to terminal, on very first time interval, base station and terminal do not send data, then, the upstream data that the uplink transmission block that the base station receiving terminal forms by 5 continuous ascending physical signal frames sends, on second 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, on the 3rd time interval, base station and terminal do not send data, then, the base station is the 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, on the 5th time interval, base station and terminal do not send data, then, the base station upstream data that sends of another uplink transmission block of forming of logical 5 the continuous ascending physical signal frames of receiving terminal again.
In the transmission method of the upstream data under the above-mentioned TDD3:5 mode, do not provide uplink extended data sub-packets transmission and the feedback mechanism of (perhaps being called the uplink extended packet), therefore, need a kind of technical scheme that can remedy this defective.
Summary of the invention
Consider the transmission that under the TDD3:5 mode, needs a kind of uplink extended data sub-packets that exists in the correlation technique and feedback mechanism technology problem and the present invention is proposed, for this reason, the present invention aims to provide a kind of uplink/feedback method based on time division duplex system in wireless communication and system.
According to an aspect of the present invention, a kind of uplink/feedback method based on time division duplex system in wireless communication at first 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.
The uplink/feedback method based on time division duplex system in wireless communication according to the embodiment of the invention comprises following processing: terminal uses two or three continuous ascending physical signal frames of uplink transmission block to send the uplink extended data sub-packets to the base station; The uplink extended data sub-packets that the base station demodulation receives; Based on demodulation result, the ascending physical signal frame that use according to terminal the base station, and according to the mapping relations of the up/down row physical frame that sets in advance, the predetermined downstream physical frame of the downstream transmission blocks after uplink transmission block send be used for expression whether successful demodulation the response message of uplink extended data sub-packets; Terminal demodulation response message, and whether demodulation is successful to judge the uplink extended data sub-packets according to response message, for the uplink extended data sub-packets of demodulation failure, terminal corresponding ascending physical signal frame in next uplink transmission block sends and retransmits the uplink extended data sub-packets.
Preferably, the above-mentioned mapping relations that set in advance are: when terminal used first three ascending physical signal frame of uplink transmission block to send the uplink extended data sub-packets, predetermined downstream physical frame was first downstream physical frame in the downstream transmission blocks; When terminal used three ascending physical signal frames in centre of uplink transmission block to send the uplink extended data sub-packets, predetermined downstream physical frame was second downstream physical frame in the downstream transmission blocks; When terminal used rear three ascending physical signal frames of uplink transmission block to send the uplink extended data sub-packets, predetermined downstream physical frame was the 3rd downstream physical frame in the downstream transmission blocks; When terminal used the first two ascending physical signal frame of uplink transmission block to send the uplink extended data sub-packets, predetermined downstream physical frame was first downstream physical frame in the downstream transmission blocks; When terminal was used second of uplink transmission block and the 3rd ascending physical signal frame transmission uplink extended data sub-packets, predetermined downstream physical frame was second downstream physical frame in the downstream transmission blocks; When the 3rd and the 4th ascending physical signal frame of terminal use uplink transmission block, when perhaps using latter two ascending physical signal frame transmission uplink extended data sub-packets of uplink transmission block, predetermined downstream physical frame is the 3rd downstream physical frame in the downstream transmission blocks.
Preferably, said method further comprises following processing: set in advance retransmission threshold value, 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.
Further preferably, the re-transmission uplink extended data sub-packets that terminal sends for the n time is that the n level retransmits the uplink extended data sub-packets, and wherein, n＜=N, N are retransmission threshold value.
Preferably, said method further comprises following processing: for the uplink extended data sub-packets of demodulation success, terminal corresponding ascending physical signal frame in next uplink transmission block sends other uplink extended data sub-packets.
Preferably, the above-mentioned position of corresponding ascending physical signal frame in next uplink transmission block and the position consistency of ascending physical signal frame in uplink transmission block that sends the uplink extended data sub-packets.
According to a further aspect in the invention, provide a kind of uplink/reponse system based on time division duplex system in wireless communication.
The uplink/reponse system based on time division duplex system in wireless communication according to the embodiment of the invention 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 uplink/reponse system based on time division duplex system in wireless communication according to the embodiment of the invention, terminal comprises: the uplink unit is used for using two or three continuous ascending physical signal frames of uplink transmission block to send the uplink extended 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 the uplink extended data sub-packets according to response message; Retransmission unit, the corresponding ascending physical signal frame that is used for next uplink transmission block of use sends the re-transmission uplink extended data sub-packets of the uplink extended data sub-packets of demodulation failure; The base station comprises: demodulating unit is used for the uplink extended data sub-packets that the demodulation base station receives; The downlink transfer unit, ascending physical signal frame according to the terminal use, and according to the mapping relations of the up/down row physical frame that sets in advance, the predetermined downstream physical frame of the downstream transmission blocks after uplink transmission block to terminal send be used for expression whether successful demodulation the response message of uplink extended data sub-packets.
Preferably, the mapping relations that set in advance are: when terminal used first three ascending physical signal frame of uplink transmission block to send the uplink extended data sub-packets, predetermined downstream physical frame was first downstream physical frame in the downstream transmission blocks; When terminal used three ascending physical signal frames in centre of uplink transmission block to send the uplink extended data sub-packets, predetermined downstream physical frame was second downstream physical frame in the downstream transmission blocks; When terminal used rear three ascending physical signal frames of uplink transmission block to send the uplink extended data sub-packets, predetermined downstream physical frame was the 3rd downstream physical frame in the downstream transmission blocks; Or when terminal used the first two ascending physical signal frame of uplink transmission block to send the uplink extended data sub-packets, predetermined downstream physical frame was first downstream physical frame in the downstream transmission blocks; When terminal was used second of uplink transmission block and the 3rd ascending physical signal frame transmission uplink extended data sub-packets, predetermined downstream physical frame was second downstream physical frame in the downstream transmission blocks; When the 3rd and the 4th ascending physical signal frame of terminal use uplink transmission block, when perhaps using latter two ascending physical signal frame transmission uplink extended data sub-packets of uplink transmission block, predetermined downstream physical frame is the 3rd downstream physical frame in the downstream transmission blocks.
Preferably, above-mentioned terminal 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 uplink extended data sub-packets of demodulation failure, no longer retransmit.
Further preferably, the re-transmission uplink extended data sub-packets that retransmission unit sends for the n time is that the n level retransmits the uplink extended data sub-packets, wherein, and n＜=N, the retransmission threshold value that N arranges for retransmitting the threshold value setting unit.
Preferably, the position of the corresponding ascending physical signal frame of above-mentioned retransmission unit use in next uplink transmission block and the position consistency of ascending physical signal frame in uplink transmission block of uplink unit use.
By above-mentioned at least one technical scheme provided by the invention, by making terminal send the growth data attached bag at two or three continuous ascending physical signal frames, and the ascending physical signal frame that the base station is used according to terminal sends response message in the predetermined downstream physical frame of downstream transmission blocks, realized transmission and the feedback of uplink extended data sub-packets, remedied and lack the transmission of growth data attached bag and the defective of feedback mechanism in the correlation technique under the TDD3:5 mode.
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 uplink/feedback method of TDD system according to the inventive method embodiment;
Fig. 2 (a) and Fig. 2 (b) are the schematic diagrames of the example 1 of method shown in Figure 1;
Fig. 3 (a) and Fig. 3 (b) are the schematic diagrames of the example 2 of method shown in Figure 1;
Fig. 4 (a) and Fig. 4 (b) are the schematic diagrames of the example 3 of method shown in Figure 1;
Fig. 5 (a) and Fig. 5 (b) are the schematic diagrames of the example 4 of method shown in Figure 1;
Fig. 6 (a) and Fig. 6 (b) are the schematic diagrames of the example 5 of method shown in Figure 1;
Fig. 7 (a) and Fig. 7 (b) are the schematic diagrames of the example 6 of method shown in Figure 1;
Fig. 8 (a) and Fig. 8 (b) are the schematic diagrames of the example 7 of method shown in Figure 1;
Fig. 9 is the structured flowchart based on the uplink/reponse system of TDD system of system according to the invention embodiment.
Embodiment
As mentioned above, in the transmission method of the upstream data under the TDD3:5 mode, need transmission and the feedback mechanism of a kind of uplink extended data sub-packets (perhaps being called the uplink extended packet).Given this, the embodiment of the invention provides a kind of uplink/feedback method based on the TDD system and system, particularly, and a kind of transmission/feedback method and system of the uplink extended data sub-packets based on the TDD system.
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
According to the embodiment of the invention, a kind of uplink/feedback method based on wireless communications tdd system at first 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 time division duplex (being referred to herein as the TDD3:5 mode) of uplink.
Fig. 1 is the flow chart based on the uplink/feedback 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, terminal uses two or three continuous ascending physical signal frames of uplink transmission block to send uplink extended data sub-packets (perhaps be called the uplink extended packet, this does not affect essence of the present invention) to the base station;
Step S104, the uplink extended data sub-packets that the base station demodulation receives;
Step S106, based on demodulation result, the ascending physical signal frame that use according to terminal the base station, and according to the mapping relations of the up/down row physical frame that sets in advance, the predetermined downstream physical frame of the downstream transmission blocks after uplink transmission block send be used for expression whether successful demodulation the uplink extended data sub-packets response message (for example, growth data attached bag that ACK/NACK, ACK have represented base station success demodulation, NACK represents that the base station does not have successful demodulation growth data attached bag);
Step S108, terminal demodulation response message, and whether demodulation is successful to judge the uplink extended data sub-packets according to response message, and for the uplink extended data sub-packets of demodulation failure (NACK), terminal corresponding ascending physical signal frame in next uplink transmission block sends and retransmits the uplink extended data sub-packets; Here the position of corresponding ascending physical signal frame in next uplink transmission block of mentioning and the position consistency of ascending physical signal frame in uplink transmission block that sends the uplink extended data sub-packets.
Below further describe the details in the above-mentioned processing.
In the unit of transfer of superframe, a downstream transmission blocks is comprised of 3 continuous downstream physical frame, and a uplink transmission block is comprised of 5 continuous ascending physical signal frames.
In step S102, the uplink transmission block of the original transmission that the uplink extended data sub-packets sends is unrestricted in the position of superframe, original position can be at first uplink transmission block of superframe, also can be at second uplink transmission block of superframe, the border of superframe is to the HARQ retransmission process of uplink extended data sub-packets without limits.In addition, the ascending physical signal frame that terminal is used can be any two or three continuous ascending physical signal frames in 5 ascending physical signal frames of uplink transmission block, and the present invention is not limited in this respect.
Reply employed downstream physical frame for the employed ascending physical signal frame of up transmission growth data attached bag and base station and can set in advance mapping relations, like this, in step S106, the difference of the ascending physical signal frame that uses according to terminal, the downstream physical frame that use the base station also has difference, particularly:
(1) when terminal used first three ascending physical signal frame of uplink transmission block to send the uplink extended data sub-packets, predetermined downstream physical frame was first downstream physical frame in the downstream transmission blocks;
(2) when terminal used three ascending physical signal frames in centre of uplink transmission block to send the uplink extended data sub-packets, predetermined downstream physical frame was second downstream physical frame in the downstream transmission blocks;
(3) when terminal used rear three ascending physical signal frames of uplink transmission block to send the uplink extended data sub-packets, predetermined downstream physical frame was the 3rd downstream physical frame in the downstream transmission blocks;
(4) when terminal used the first two ascending physical signal frame of uplink transmission block to send the uplink extended data sub-packets, predetermined downstream physical frame was first downstream physical frame in the downstream transmission blocks;
(5) when terminal was used second of uplink transmission block and the 3rd ascending physical signal frame transmission uplink extended data sub-packets, predetermined downstream physical frame was second downstream physical frame in the downstream transmission blocks;
(6) when terminal was used the 3rd of uplink transmission block and the 4th ascending physical signal frame transmission uplink extended data sub-packets, predetermined downstream physical frame was the 3rd downstream physical frame in the downstream transmission blocks;
(7) when terminal used latter two ascending physical signal frame of uplink transmission block to send the uplink extended data sub-packets, predetermined downstream physical frame was the 3rd downstream physical frame in the downstream transmission blocks.
By top mapping relations are set, can guarantee that the base station has relatively many time that the growth data attached bag of terminal uplink is resolved and made and replying, and can guarantee that terminal also has relatively many time to carry out follow-up transmission or retransmission operation according to replying of base station.
In step S108, for the uplink extended data sub-packets of demodulation success (ACK), terminal corresponding ascending physical signal frame in next uplink transmission block sends other uplink extended data sub-packets (the HARQ retransmission processing method of other growth data attached bags is identical with the processing method of above-described growth data attached bag).
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 re-transmission uplink extended data sub-packets that terminal sends for the n time is that the n level retransmits the uplink extended data sub-packets, wherein, and n＜=N.
For example, the re-transmission uplink extended data sub-packets that sends for the first time is that the first order retransmits the uplink extended data sub-packets.If the correct demodulation in base station the first order retransmit the uplink extended data sub-packets, then in the downstream transmission blocks that ensuing 3 continuous downstream physical frame form, the base station sends ACK message in above-mentioned predetermined physical frame position; If the base station does not have the correct demodulation first order to retransmit the uplink extended data sub-packets, then in the downstream transmission blocks that ensuing 3 continuous downstream physical frame form, the base station sends NACK message in above-mentioned predetermined physical frame position.Terminal demodulation ACK/NACK message, if ACK message, expression base station success demodulation data, then terminal corresponding continuous 2 or 3 physical frame positions on the uplink transmission block that ensuing 5 continuous ascending physical signal frames form send other uplink extended data sub-packets; If NACK message, the expression base station does not still have successful demodulating data, then terminal respective channel resource of corresponding 2 or 3 continuous physical frame positions on the uplink transmission block that ensuing 5 continuous ascending physical signal frames form sends the second level and retransmits the growth data attached bag, until transmission times has reached retransmission threshold value or base station demodulation success.
Below will above-described embodiment be described further combined with example.
Example 1: terminal is in first three physical frame transmission uplink extended data sub-packets of uplink transmission block
Shown in Fig. 2 (a) and Fig. 2 (b), on first three physical frame R0, R1 of first uplink transmission block of superframe, R2, terminal sends uplink extended data sub-packets P0 to the base station.
Shown in Fig. 2 (a), if the correct demodulation in base station P0, then first downstream physical frame (F3) position in ensuing downstream transmission blocks sends ACK message.After terminal received ACK message, then first three physical frame position R5, R6 and the R7 at 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's.
Shown in Fig. 2 (b), if the base station does not have correct demodulation P0, then first downstream physical frame (F3) position in ensuing downstream transmission blocks sends NACK message.After terminal received NACK message, then first three physical frame position R5, R6 and the respective channel resource on the R7 at ensuing uplink transmission block sent first order re-transmission growth data attached bag R1P0.
If the correct demodulation in base station the first order retransmit the growth data attached bag, then first downlink physical frame position in ensuing downstream transmission blocks sends ACK message; After terminal receives ACK message, then send other data sub-packets P ' 0 in first three physical frame position of ensuing uplink transmission block.
If the base station does not still have the correct demodulation first order to retransmit the growth data attached bag, then the first downlink physical frame position sends NACK message in ensuing downstream transmission blocks.After terminal received NACK message, then the respective channel resource in first three physical frame position of ensuing uplink transmission block sent the second level and retransmits growth data attached bag R2P0.
In like manner, if the correct demodulation in base station the uplink extended data sub-packets, just first downlink physical frame position in ensuing downstream transmission blocks sends ACK message, terminal receives ACK message, just the ascending physical signal frame position in correspondence sends other data sub-packets; If the base station does not have correct demodulation uplink extended data sub-packets, just first physical frame position in ensuing downstream transmission blocks sends NACK message, terminal receives NACK message, just the respective channel resource in the ascending physical signal 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 the technical scheme that this example provides, feedback and re-transmission when terminal uses first three physical frame of uplink transmission block to transmit uplink extended data sub-packets have been realized.
Example 2: terminal is in three the physical frame transmission in the centre of uplink transmission block uplink extended data sub-packets
With reference to Fig. 3 (a) and Fig. 3 (b), understand easily, use middle three ascending physical signal frame R1, R2 and R3 to send the situation of uplink extended data sub-packets for terminal, the base station will send in downstream physical frame F4 position ACK/NACK message, its HARQ retransmission processing method and said process are similar, no longer are repeated in this description at this.
By the technical scheme that this example provides, feedback and re-transmission when terminal uses three physical frames in centre of uplink transmission block to transmit the uplink extended data sub-packets have been realized.
Example 3: terminal is in rear three physical frames transmission uplink extended data sub-packets of uplink transmission block
Shown in Fig. 4 (a) and Fig. 4 (b), on rear three physical frame R2, the R3 of first uplink transmission block of superframe, R4, terminal sends uplink extended data sub-packets P0 to the base station.
Shown in Fig. 4 (a), if the correct demodulation in base station P0, then the 3rd downstream physical frame (F5) position in ensuing downstream transmission blocks sends ACK message.After terminal received ACK message, then rear three physical frame position R7, R8 and the R9 at 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's.
Shown in Fig. 4 (b), if the base station does not have correct demodulation P0, then the 3rd downstream physical frame (F5) position in ensuing downstream transmission blocks sends NACK message.After terminal received NACK message, then rear three physical frame position R7, R8 and the respective channel resource on the R9 at ensuing uplink transmission block sent first order re-transmission growth data attached bag R1P0.
If the correct demodulation in base station the first order retransmit the growth data attached bag, then the 3rd downlink physical frame position in ensuing downstream transmission blocks sends ACK message; After terminal receives ACK message, then send other data sub-packets P ' 0 in rear three physical frame positions of ensuing uplink transmission block.
If the base station does not still have the correct demodulation first order to retransmit the growth data attached bag, then the 3rd downlink physical frame position sends NACK message in ensuing downstream transmission blocks.After terminal received NACK message, then the respective channel resource in rear three physical frame positions of ensuing uplink transmission block sent the second level and retransmits growth data attached bag R2P0.
In like manner, if the correct demodulation in base station the uplink extended data sub-packets, just the 3rd downlink physical frame position in ensuing downstream transmission blocks sends ACK message, terminal receives ACK message, just the ascending physical signal frame position in correspondence sends other data sub-packets; If the base station does not have correct demodulation uplink extended data sub-packets, just the 3rd physical frame position in ensuing downstream transmission blocks sends NACK message, terminal receives NACK message, just the respective channel resource in the ascending physical signal 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 the technical scheme that this example provides, feedback and re-transmission when terminal uses rear three physical frames of uplink transmission block to transmit the uplink extended data sub-packets have been realized.
Example 4: terminal is in the first two physical frame transmission uplink extended data sub-packets of uplink transmission block
Shown in Fig. 5 (a) and Fig. 5 (b), on the first two physical frame R0 and R1 of first uplink transmission block of superframe, terminal sends uplink extended data sub-packets P0 to the base station.
Shown in Fig. 5 (a), if the correct demodulation in base station P0, then first physical frame (F3) position in ensuing downstream transmission blocks sends ACK message.After terminal received ACK message, then the first two physical frame position R5 and the R6 at 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's.
Shown in Fig. 5 (b), if the base station does not have correct demodulation P0, then first physical frame (F3) position in ensuing downstream transmission blocks sends NACK message.After terminal received NACK message, then the first two physical frame position R5 and the respective channel resource on the R6 at ensuing uplink transmission block sent first order re-transmission growth data attached bag R1P0.
If the correct demodulation in base station the first order retransmit the growth data attached bag, then first physical frame position in ensuing downstream transmission blocks sends ACK message; After terminal receives ACK message, then send other data sub-packets P ' 0 in the first two physical frame position of ensuing uplink transmission block.
If the base station does not still have the correct demodulation first order to retransmit the growth data attached bag, then first physical frame position sends NACK message in ensuing downstream transmission blocks.After terminal received NACK message, then the respective channel resource in the first two physical frame position of ensuing uplink transmission block sent the second level and retransmits growth data attached bag R2P0.
In like manner, if the correct demodulation in base station the uplink extended data sub-packets, just first physical frame position in ensuing downstream transmission blocks sends ACK message, terminal receives ACK message, just the ascending physical signal frame position in correspondence sends other data sub-packets; If the base station does not have correct demodulation uplink extended data sub-packets, just first physical frame position in ensuing downstream transmission blocks sends NACK message, terminal receives NACK message, just the respective channel resource in the ascending physical signal 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 the technical scheme that this example provides, feedback and re-transmission when terminal uses the first two physical frame of uplink transmission block to transmit the uplink extended data sub-packets have been realized.
Example 5: terminal is in second and the 3rd physical frame transmission uplink extended data sub-packets of uplink transmission block
With reference to Fig. 6 (a) and Fig. 6 (b), understand easily, situation for second and the 3rd ascending physical signal frame R1 of terminal use and R2 transmission uplink extended data sub-packets, the base station will send in downstream physical frame F4 position ACK/NACK message, its HARQ retransmission processing method and said process are similar, no longer are repeated in this description at this.
By the technical scheme that this example provides, feedback and re-transmission when terminal uses second of uplink transmission block and the 3rd physical frame to transmit the uplink extended data sub-packets have been realized.
Example 6: terminal is in the 3rd and the 4th physical frame transmission uplink extended data sub-packets of uplink transmission block
With reference to Fig. 7 (a) and Fig. 7 (b), understand easily, use the 3rd and the 4th ascending physical signal frame R1 and R2 to send the situation of uplink extended data sub-packets for terminal, the base station will send in downstream physical frame F5 position ACK/NACK message, its HARQ retransmission processing method and said process are similar, no longer are repeated in this description at this.
By the technical scheme that this example provides, feedback and re-transmission when terminal uses the 3rd of uplink transmission block and the 4th physical frame to transmit the uplink extended data sub-packets have been realized.
Example 7: terminal is in latter two physical frame transmission uplink extended data sub-packets of uplink transmission block
With reference to Fig. 8 (a) and Fig. 8 (b), understand easily, use latter two ascending physical signal frame R3 and R4 to send the situation of uplink extended data sub-packets for terminal, the base station will send in downstream physical frame F5 position ACK/NACK message, its HARQ retransmission processing method and said process are similar, no longer are repeated in this description at this.
By the technical scheme that this example provides, feedback and re-transmission when terminal uses latter two physical frame of uplink transmission block to transmit uplink extended data sub-packets have been realized.
Can find out by top description, by making terminal send the growth data attached bag at two or three continuous ascending physical signal frames, and make the base station send response message in the predetermined downstream physical frame of downstream transmission blocks, realized transmission and the feedback of uplink extended data sub-packets under the TDD3:5 mode.
System embodiment
According to the embodiment of the invention, provide a kind of uplink/reponse system based on time division duplex system in wireless communication.
The uplink/reponse system based on wireless communications tdd system according to the embodiment of the invention 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 (being referred to herein as the TDD3:5 mode) of uplink.
Fig. 9 is the structured flowchart based on the uplink/reponse system of wireless communications tdd system that illustrates according to the embodiment of the invention.For convenience of description, only show a base station and a terminal among Fig. 9.As shown in Figure 9, in the uplink/reponse system based on wireless communications tdd system according to the embodiment of the invention, terminal comprises: uplink unit 902, response message demodulating unit 904, retransmission unit 906, the base station comprises: demodulating unit 908, downlink transfer unit 910.
Particularly, uplink unit 902 is used for using two or three continuous ascending physical signal frames of uplink transmission block to send the uplink extended data sub-packets to the base station; Response message demodulating unit 904 is used for receiving the also response message of demodulation base station transmission, and whether demodulation is successful to judge the uplink extended data sub-packets according to response message, and uplink unit 902 is connected with response message demodulating unit 904; Retransmission unit 906 is connected to response message demodulating unit 904, and the corresponding ascending physical signal frame that is used for next uplink transmission block of use sends the re-transmission uplink extended data sub-packets of the uplink extended data sub-packets of demodulation failure.
Demodulating unit 908 is used for the uplink extended data sub-packets that the demodulation base station receives; The ascending physical signal frame that downlink transfer unit 910 is used for according to the terminal use, and according to the mapping relations of the up/down row physical frame that sets in advance, the predetermined downstream physical frame of the downstream transmission blocks after uplink transmission block to terminal send be used for expression whether successful demodulation the response message of uplink extended data sub-packets.
Particularly, the mapping relations that set in advance of above mentioning are:
(1) when terminal used first three ascending physical signal frame of uplink transmission block to send the uplink extended data sub-packets, predetermined downstream physical frame was first downstream physical frame in the downstream transmission blocks;
(2) when terminal used three ascending physical signal frames in centre of uplink transmission block to send the uplink extended data sub-packets, predetermined downstream physical frame was second downstream physical frame in the downstream transmission blocks;
(3) when terminal used rear three ascending physical signal frames of uplink transmission block to send the uplink extended data sub-packets, predetermined downstream physical frame was the 3rd downstream physical frame in the downstream transmission blocks;
(4) when terminal used the first two ascending physical signal frame of uplink transmission block to send the uplink extended data sub-packets, predetermined downstream physical frame was first downstream physical frame in the downstream transmission blocks;
(5) when terminal was used second of uplink transmission block and the 3rd ascending physical signal frame transmission uplink extended data sub-packets, predetermined downstream physical frame was second downstream physical frame in the downstream transmission blocks;
(6) when terminal was used the 3rd of uplink transmission block and the 4th ascending physical signal frame transmission uplink extended data sub-packets, predetermined downstream physical frame was the 3rd downstream physical frame in the downstream transmission blocks;
(7) when terminal used latter two ascending physical signal frame of uplink transmission block to send the uplink extended data sub-packets, predetermined downstream physical frame was the 3rd downstream physical frame in the downstream transmission blocks.
Preferably, above-mentioned terminal further comprises: retransmission threshold value setting unit (not shown), and be used for arranging retransmission threshold value, 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.
Further preferably, the re-transmission uplink extended data sub-packets that retransmission unit sends for the n time is that the n level retransmits the uplink extended data sub-packets, wherein, and n＜=N, the retransmission threshold value that N arranges for retransmitting the threshold value setting unit.
Preferably, the position of the corresponding ascending physical signal frame of above-mentioned retransmission unit use in next uplink transmission block and the position consistency of ascending physical signal frame in uplink transmission block of uplink unit use.
The technical scheme of this system embodiment can be understood and implements with reference to the embodiment of the method that provides above equally, no longer is repeated in this description at this.
As mentioned above, by above-mentioned at least one technical scheme provided by the invention, in suitable downstream physical frame the uplink extended data sub-packets that terminal sends is replied according to the mapping relations that set in advance by making the base station, 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 transmission and feedback and the re-transmission of uplink extended data sub-packets, remedied and lack the transmission of growth data attached bag and the defective of feedback mechanism in the correlation technique under the TDD3:5 mode.
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 (11)
1. uplink/feedback 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:
Terminal uses two or three continuous ascending physical signal frames of uplink transmission block to send the uplink extended data sub-packets to the base station;
The described uplink extended data sub-packets that the demodulation of described base station receives;
Based on demodulation result, the ascending physical signal frame that use according to described terminal described base station, and according to the mapping relations of the up/down row physical frame that sets in advance, the predetermined downstream physical frame of the downstream transmission blocks after described uplink transmission block send be used for expression whether successful demodulation the response message of described uplink extended data sub-packets;
The described response message of described terminal demodulation, and whether demodulation is successful to judge described uplink extended data sub-packets according to described response message, for the uplink extended data sub-packets of demodulation failure, described terminal corresponding ascending physical signal frame in next uplink transmission block sends and retransmits the uplink extended data sub-packets.
2. method according to claim 1 is characterized in that, the described mapping relations that set in advance are:
When described terminal used first three ascending physical signal frame of described uplink transmission block to send described uplink extended data sub-packets, described predetermined downstream physical frame was first downstream physical frame in the described downstream transmission blocks;
When described terminal used three ascending physical signal frames in centre of described uplink transmission block to send described uplink extended data sub-packets, described predetermined downstream physical frame was second downstream physical frame in the described downstream transmission blocks;
When described terminal used rear three ascending physical signal frames of described uplink transmission block to send described uplink extended data sub-packets, described predetermined downstream physical frame was the 3rd downstream physical frame in the described downstream transmission blocks.
3. method according to claim 1 is characterized in that, the described mapping relations that set in advance are:
When described terminal used the first two ascending physical signal frame of described uplink transmission block to send described uplink extended data sub-packets, described predetermined downstream physical frame was first downstream physical frame in the described downstream transmission blocks;
When described terminal used second of described uplink transmission block and the 3rd ascending physical signal frame to send described uplink extended data sub-packets, described predetermined downstream physical frame was second downstream physical frame in the described downstream transmission blocks;
Use the 3rd and the 4th ascending physical signal frame of described uplink transmission block when described terminal, when perhaps using latter two ascending physical signal frame of described uplink transmission block to send described uplink extended data sub-packets, described predetermined downstream physical frame is the 3rd downstream physical frame in the described downstream transmission blocks.
4. each described method in 3 according to claim 1 is characterized in that, further comprises:
Set in advance retransmission threshold value, and reach in the situation of described retransmission threshold value in the transmission times of the described uplink extended data sub-packets of demodulation failure, no longer retransmit.
5. method according to claim 4 is characterized in that, the described re-transmission uplink extended data sub-packets that described terminal sends for the n time is that the n level retransmits the uplink extended data sub-packets, and wherein, n＜=N, N are described retransmission threshold value.
6. each described method in 3 according to claim 1 is characterized in that, further comprises:
For the uplink extended data sub-packets of demodulation success, described terminal corresponding ascending physical signal frame in next uplink transmission block sends other uplink extended data sub-packets.
7. each described method in 3 according to claim 1, it is characterized in that the position of corresponding ascending physical signal frame in described next uplink transmission block and the position consistency of described ascending physical signal frame in described uplink transmission block that sends described uplink extended data sub-packets.
8. uplink/reponse 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 terminal comprises:
The uplink unit is used for using two or three continuous ascending physical signal frames of uplink transmission block to send the uplink extended 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 described uplink extended data sub-packets according to described response message;
Retransmission unit, the corresponding ascending physical signal frame that is used for next uplink transmission block of use sends the re-transmission uplink extended data sub-packets of the uplink extended data sub-packets of demodulation failure;
Described base station comprises:
Demodulating unit is used for the described uplink extended data sub-packets that the described base station of demodulation receives;
The downlink transfer unit, be used for the ascending physical signal frame according to described terminal use, and according to the mapping relations of the up/down row physical frame that sets in advance, the predetermined downstream physical frame of the downstream transmission blocks after described uplink transmission block to described terminal send be used for expression whether successful demodulation the described response message of described uplink extended data sub-packets.
9. system according to claim 8 is characterized in that, the described mapping relations that set in advance are:
When described terminal used first three ascending physical signal frame of described uplink transmission block to send described uplink extended data sub-packets, described predetermined downstream physical frame was first downstream physical frame in the described downstream transmission blocks;
When described terminal used three ascending physical signal frames in centre of described uplink transmission block to send described uplink extended data sub-packets, described predetermined downstream physical frame was second downstream physical frame in the described downstream transmission blocks;
When described terminal used rear three ascending physical signal frames of described uplink transmission block to send described uplink extended data sub-packets, described predetermined downstream physical frame was the 3rd downstream physical frame in the described downstream transmission blocks; Or
When described terminal used the first two ascending physical signal frame of described uplink transmission block to send described uplink extended data sub-packets, described predetermined downstream physical frame was first downstream physical frame in the described downstream transmission blocks;
When described terminal used second of described uplink transmission block and the 3rd ascending physical signal frame to send described uplink extended data sub-packets, described predetermined downstream physical frame was second downstream physical frame in the described downstream transmission blocks;
Use the 3rd and the 4th ascending physical signal frame of described uplink transmission block when described terminal, when perhaps using latter two ascending physical signal frame of described uplink transmission block to send described uplink extended data sub-packets, described predetermined downstream physical frame is the 3rd downstream physical frame in the described downstream transmission blocks.
10. according to claim 8 or 9 described systems, it is characterized in that described terminal further comprises:
The retransmission threshold value setting unit is used for arranging retransmission threshold value, and reaches in the situation of described retransmission threshold value in the transmission times of the described uplink extended data sub-packets of demodulation failure, no longer retransmits.
11. according to claim 8 or 9 described systems, it is characterized in that the position of the corresponding ascending physical signal frame that described retransmission unit is used in described next uplink transmission block and the position consistency of described ascending physical signal frame in described uplink transmission block of described uplink unit use.
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| CN 200810086367 CN101547074B (en) | 2008-03-26 | 2008-03-26 | Uplink transmission/feedback method and uplink transmission/feedback system based on wireless communication time-division duplex (TDD) system |
| PCT/CN2009/070518 WO2009105990A1 (en) | 2008-02-25 | 2009-02-24 | Uplink transmission / feedback method based on wireless communication time division duplex system |
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| CN101039452A (en) * | 2006-03-15 | 2007-09-19 | 华为技术有限公司 | Method for transmitting scheduling information of enhanced dedication channel and system thereof |
| CN101047431A (en) * | 2006-06-22 | 2007-10-03 | 华为技术有限公司 | Method for implementing mixed automatic retransmit in communication system containing repeater station |
| CN101129031A (en) * | 2005-03-22 | 2008-02-20 | 三星电子株式会社 | Method and apparatus for transmitting packet data |
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| CN101129031A (en) * | 2005-03-22 | 2008-02-20 | 三星电子株式会社 | Method and apparatus for transmitting packet data |
| CN101039452A (en) * | 2006-03-15 | 2007-09-19 | 华为技术有限公司 | Method for transmitting scheduling information of enhanced dedication channel and system thereof |
| CN101047431A (en) * | 2006-06-22 | 2007-10-03 | 华为技术有限公司 | Method for implementing mixed automatic retransmit in communication system containing repeater station |
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