CN101547073B - 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 TDD6:2 mode. The method comprises the following steps that: a terminal uses two 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, 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 two uplink physical frames 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 TDD6:2 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
In will carrying out the wireless system of transfer of data as unit 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 TDD6:2 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, at first the base station sends leading to described terminal, the downstream transmission blocks that forms by 6 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 2 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 6 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 2 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 6 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 is the upstream data of another uplink transmission block transmission of logical 2 the continuous ascending physical signal frames compositions of receiving terminal again.
In the transmission method of the upstream data under above-mentioned TDD6:2 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 make up this defective.
Summary of the invention
Consider the transmission that needs a kind of uplink extended data sub-packets under the TDD6:2 mode that exists in 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, at first a kind of uplink/feedback 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 6 continuous downstream physical frame, will comprise that the uplink transmission block of 2 continuous ascending physical signal frames is used for the time division duplex of uplink.
Comprise following processing according to the uplink/feedback method based on time division duplex system in wireless communication of the embodiment of the present invention: terminal uses two 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 predetermined 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 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 sends re-transmission uplink extended data sub-packets at two ascending physical signal frames of next uplink transmission block.
Preferably, predetermined downstream physical frame is: the 3rd or the 4th downstream physical frame of downstream transmission blocks.
Preferably, said method further comprises following processing: set in advance retransmission threshold value, and in the situation that the transmission times of the uplink extended data sub-packets of demodulation failure reaches retransmission threshold value, 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.
According to a further aspect in the invention, provide a kind of uplink/reponse system based on time division duplex system in wireless communication.
Comprise base station and one or more terminal according to the uplink/reponse system based on time division duplex system in wireless communication of the embodiment of the present invention, and be used for downlink transfer based on the downstream transmission blocks that will comprise 6 continuous downstream physical frame, will comprise that the uplink transmission block of 2 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 present invention, terminal comprises: the uplink unit is used for using two 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, two ascending physical signal frames that are used for next uplink transmission block of use send the re-transmission uplink extended data sub-packets of the uplink extended data sub-packets of demodulation failures; 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, based on the demodulation result of demodulating unit, the predetermined downstream physical frame of the downstream transmission blocks after uplink transmission block to terminal send to be used for expression whether successful demodulation the response message of uplink extended data sub-packets.
Preferably, the predetermined downstream physical frame of downlink transfer unit use is: the 3rd or the 4th downstream physical frame of described downstream transmission blocks.
Preferably, above-mentioned terminal further comprises: the retransmission threshold value setting unit is used for retransmission threshold value is set, and in the situation that the transmission times of the uplink extended data sub-packets of demodulation failure reaches retransmission threshold value, no longer retransmits.
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, n＜=N, N is for retransmitting the retransmission threshold value of threshold value setting unit setting.
By above-mentioned at least one technical scheme provided by the invention, by making terminal send the growth data attached bag on two ascending physical signal frames of uplink transmission block, and the ascending physical signal frame that the base station is used according to terminal sends response message on the predetermined downstream physical frame of downstream transmission blocks, realized transmission and the feedback of uplink extended data sub-packets, made up and lack the transmission of growth data attached bag and the defective of feedback mechanism in the correlation technique under the TDD6:2 mode.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from specification, 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 of method shown in Figure 1;
Fig. 3 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 TDD6:2 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 present invention provides a kind of uplink/feedback method and system based on the TDD 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 present invention, at first a kind of uplink/feedback 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 6 continuous downstream physical frame, will comprise that the uplink transmission block of 2 continuous ascending physical signal frames is used for the time division duplex (being referred to herein as the TDD6:2 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 present invention.As shown in Figure 1, the method comprises following processing:
Step S102, terminal uses two 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 predetermined downstream physical frame of the downstream transmission blocks of base station after uplink transmission block send be used for expression whether successful demodulation the uplink extended data sub-packets response message (for example, ACK/NACK, growth data attached bag that ACK has 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 sends re-transmission uplink extended data sub-packets at two ascending physical signal frames of next uplink transmission block.
Below further describe the details in above-mentioned processing.
In the unit of transfer of superframe, a downstream transmission blocks is comprised of 6 continuous downstream physical frame, and a uplink transmission block is comprised of 2 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 HARQ retransmission process not restriction of the border of superframe to the uplink extended data sub-packets.
For the predetermined downstream physical frame of mentioning in step S106, be preferably the 3rd or the 4th physical frame in downstream transmission blocks, specifically with which physical frame reply, can determine according to the predefined rule of correspondence, the present invention is not limited in this respect.
To send response message be because other downstream physical frame in the downstream transmission blocks select these two physical frames can guarantee that there are relatively many processing times terminal and base station for preferred the 3rd or the 4th downstream physical frame in the present invention.For example, if select first physical frame to send response message, can because of the ascending physical signal frame that sends the uplink extended data sub-packets from terminal too close to and make the base station have insufficient time to carry out reply process, if select last physical frame to send response message, although the processing time of base station is enough, because the response message that causes terminal to have insufficient time to according to the base station close to too from the position of next uplink transmission block sends or retransmission operation.Select the 3rd or the 4th downstream physical frame to send response message, can avoid the problems referred to above.
In step S108, for the uplink extended data sub-packets of demodulation success (ACK), terminal 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) at two ascending physical signal frames of next uplink transmission block.
Preferably, can set in advance retransmission threshold value (N), and in the situation that the transmission times of the uplink extended data sub-packets of demodulation failure reaches retransmission threshold value, 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, in the downstream transmission blocks that ensuing 6 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, in the downstream transmission blocks that ensuing 6 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, terminal sends other uplink extended data sub-packets on the respective channel resource on the uplink transmission block that ensuing 2 continuous ascending physical signal frames form; If NACK message, the expression base station does not still have successful demodulating data, terminal sends the second level and retransmits the growth data attached bag on the respective channel resource of the uplink transmission block that ensuing 2 continuous ascending physical signal frames form, until transmission times has reached retransmission threshold value or base station demodulation success.
Below will above-described embodiment be described further combined with example.
As shown in Fig. 2 (a) and Fig. 2 (b), on two physical frame R0, R1 of first uplink transmission block of superframe, terminal sends uplink extended data sub-packets P0 to the base station.
As shown in Fig. 2 (a), if the correct demodulation in base station P0, the 3rd downstream physical frame (F8) in ensuing downstream transmission blocks or the 4th downstream physical frame (F9) position transmission ACK message, that is to say, ACK message can send on physical frame F8 or F9.After terminal receives ACK message, send other data sub-packets P ' 0 on two physical frame position R2 of ensuing uplink transmission block and R3.The HARQ retransmission processing method of other data sub-packets P ' 0 is identical with data sub-packets P0's.
As shown in Fig. 2 (b), if the base station does not have correct demodulation P0, the 3rd downstream physical frame (F8) in ensuing downstream transmission blocks or the 4th downstream physical frame (F9) position send NACK message, that is to say, NACK message can send on physical frame F8 or F9.After terminal receives NACK message, send the first order and retransmit growth data attached bag R1P0 on first three physical frame position R2 of ensuing uplink transmission block and the respective channel resource on R3.
If the correct demodulation in base station the first order retransmit the growth data attached bag, the 3rd downstream physical frame or the 4th the downlink physical frame position in ensuing downstream transmission blocks sends ACK message; After terminal receives ACK message, send other data sub-packets P ' 0 on the respective channel resource of two 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, the 3rd downstream physical frame or the 4th downlink physical frame position send NACK message in ensuing downstream transmission blocks.After terminal receives NACK message, send the second level on the respective channel resource of two physical frame positions of ensuing uplink transmission block and retransmit growth data attached bag R2P0.
In like manner, if the correct demodulation in base station the uplink extended data sub-packets, just the 3rd downstream physical frame in ensuing downstream transmission blocks or the 4th downlink physical frame position send ACK message, terminal receives ACK message, and just two ascending physical signal frames at uplink transmission block send other data sub-packets; If the base station does not have correct demodulation uplink extended data sub-packets, just the 3rd downstream physical frame in ensuing downstream transmission blocks or the 4th downlink physical frame position send NACK message, terminal receives NACK message, just two ascending physical signal frames at uplink transmission block send N level data retransmission attached bag, the maximum of N is generally 5, also can be taken as other positive integer.
Can find out by top description, by making terminal send the growth data attached bag on two physical frames of uplink transmission block, and make the base station send response message on the predetermined downstream physical frame of downstream transmission blocks, realized transmission and the feedback of uplink extended data sub-packets under the TDD6:2 mode.
System embodiment
According to the embodiment of the present invention, provide a kind of uplink/reponse system based on time division duplex system in wireless communication.
Comprise base station and one or more terminal according to the uplink/reponse system based on wireless communications tdd system of the embodiment of the present invention, and be used for downlink transfer based on the downstream transmission blocks that will comprise 6 continuous downstream physical frame, will comprise that the uplink transmission block of 2 continuous ascending physical signal frames is used for the time division duplex (being referred to herein as the TDD6:2 mode) of uplink.
Fig. 3 is the structured flowchart based on the uplink/reponse system of wireless communications tdd system that illustrates according to the embodiment of the present invention.For convenience of description, only show a base station and a terminal in Fig. 3.As shown in Figure 3, in the uplink/reponse system based on wireless communications tdd system according to the embodiment of the present invention, terminal comprises: uplink unit 302, response message demodulating unit 304, retransmission unit 306, the base station comprises: demodulating unit 308, downlink transfer unit 310.
Particularly, uplink unit 302 is used for using two ascending physical signal frames of uplink transmission block to send the uplink extended data sub-packets to the base station; The response message that response message demodulating unit 304 is used for receiving and the demodulation base station sends, and whether demodulation is successful judge the uplink extended data sub-packets according to response message, uplink unit 302 is connected with response message demodulating unit 304; Retransmission unit 306 is connected to response message demodulating unit 304, be used for to use next uplink transmission block two ascending physical signal frames send the re-transmission uplink extended data sub-packets of the uplink extended data sub-packets of demodulation failures.
Preferably, above-mentioned predetermined downstream physical frame is the 3rd or the 4th physical frame in downstream transmission blocks, specifically with which physical frame replys, and can determine according to the predefined rule of correspondence, and the present invention is not limited in this respect.To send response message be because other downstream physical frame in the downstream transmission blocks select these two physical frames can guarantee that there are relatively many processing times terminal and base station for preferred the 3rd or the 4th downstream physical frame in the present invention.For example, if select first physical frame to send response message, can because of the ascending physical signal frame that sends the uplink extended data sub-packets from terminal too close to and make the base station have insufficient time to carry out reply process, if select last physical frame to send response message, although the processing time of base station is enough, because the response message that causes terminal to have insufficient time to according to the base station close to too from the position of next uplink transmission block sends or retransmission operation.Select the 3rd or the 4th downstream physical frame to send response message, can avoid the problems referred to above.
Preferably, above-mentioned terminal further comprises: retransmission threshold value setting unit (not shown) is used for retransmission threshold value is set, and in the situation that the transmission times of the uplink extended data sub-packets of demodulation failure reaches retransmission threshold value, no longer retransmits.
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, n＜=N, N is for retransmitting the retransmission threshold value of threshold value setting unit setting.
The technical scheme of this system embodiment can be understood and implement 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, by making terminal send the growth data attached bag at two ascending physical signal frames of uplink transmission block, and the base station is replied to the uplink extended data sub-packets that terminal sends in suitable downstream physical frame, can be so that base station and terminal have the relative sufficient time resolve from the other side's data or message and carry out subsequent treatment, transmission and feedback and the re-transmission of uplink extended data sub-packets have been realized, made up and lacked the transmission of growth data attached bag and the defective of feedback mechanism in the correlation technique under the TDD6:2 mode.
The above is only the preferred embodiments of the present invention, 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., within all should being included in protection scope of the present invention.
Claims (9)
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 6 continuous downstream physical frame, to comprise that the uplink transmission block of 2 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 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 predetermined 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 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 sends re-transmission uplink extended data sub-packets at two ascending physical signal frames of next uplink transmission block.
2. method according to claim 1, is characterized in that, described predetermined downstream physical frame is: the 3rd or the 4th downstream physical frame of described downstream transmission blocks.
3. method according to claim 1 and 2, is characterized in that, further comprises:
Set in advance retransmission threshold value, and in the situation that the transmission times of the described uplink extended data sub-packets of demodulation failure reaches described retransmission threshold value, no longer retransmit.
4. method according to claim 3, 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.
5. method according to claim 1 and 2, 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.
6. 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 6 continuous downstream physical frame, to comprise that the uplink transmission block of 2 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 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, two ascending physical signal frames that are used for next uplink transmission block of use send the re-transmission uplink extended data sub-packets of the uplink extended data sub-packets of demodulation failures;
Described base station comprises:
Demodulating unit is used for the described uplink extended data sub-packets that demodulation described base station receives;
The downlink transfer unit, the predetermined downstream physical frame that is used for the downstream transmission blocks described uplink transmission block after sends to described terminal the described response message of described uplink extended data sub-packets that has been used for representing whether successful demodulation.
7. system according to claim 6, is characterized in that, the described predetermined downstream physical frame of described downlink transfer unit use is: the 3rd or the 4th downstream physical frame of described downstream transmission blocks.
8. according to claim 6 or 7 described systems, is characterized in that, described terminal further comprises:
The retransmission threshold value setting unit is used for retransmission threshold value is set, and in the situation that the transmission times of the described uplink extended data sub-packets of demodulation failure reaches described retransmission threshold value, no longer retransmits.
9. according to claim 6 or 7 described systems, it is characterized in that, the re-transmission uplink extended data sub-packets that described retransmission unit sends for the n time is that the n level retransmits the uplink extended data sub-packets, wherein, n＜=N, N are the retransmission threshold value that described retransmission threshold value setting unit arranges.
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| 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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| 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 |
| CN101110634A (en) * | 2006-07-21 | 2008-01-23 | 中兴通讯股份有限公司 | Signal transmitting method for enhanced TDD system |
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| 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 |
| CN101110634A (en) * | 2006-07-21 | 2008-01-23 | 中兴通讯股份有限公司 | Signal transmitting method for enhanced TDD system |
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