CN101616492B - Feedback method of ascending response message - Google Patents
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- CN101616492B CN101616492B CN2008101273496A CN200810127349A CN101616492B CN 101616492 B CN101616492 B CN 101616492B CN 2008101273496 A CN2008101273496 A CN 2008101273496A CN 200810127349 A CN200810127349 A CN 200810127349A CN 101616492 B CN101616492 B CN 101616492B
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Abstract
The invention discloses a feedback method of an ascending response message, comprising the steps: receiving a descending scheduling signaling from a base station, wherein a bit counter for indicating a descending subframe number which is scheduled to a mobile table in a feedback window is arranged in the descending scheduling signaling; back feeding the ascending response message by operating the response message of N descending subframes of a feedback window or carrying out combined channel coding according to feedback content of PUCCH, wherein the N stands for the size of the feedback window. The feedback method of an ascending response message can increase the feedback efficiency of a TDD system.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of feedback method of ascending response message.
Background technology
Fig. 1 shows LTE (Long Term Evolution; Long Term Evolution) system TDD (Time Division Duplex; Time division duplex) frame structure of pattern is as shown in Figure 1, and the radio frames of a 10ms (radio frame) is divided into two fields (half frame); It is the 0.5ms time slot that each field is divided into 10 length, and two time slots are formed the subframe that length is 1ms.Comprise 5 sub-frame in the field.In this frame structure, the preparation of subframe has following characteristics:
(1) subframe 0 is fixed for descending;
(2) subframe 1 (below be called the special time slot subframe) comprises 3 special time slots; Be respectively DwPTS (Downlink Pilot Time Slot, descending pilot frequency time slot), GP (GuardPeriod, protection at interval) and UpPTS (Uplink Pilot Time Slot; Uplink pilot time slot), wherein:
DwPTS is used for descending, can transmit P-SCH (Primary-SynchronizationChannel, primary synchronization channel), PDSCH signals such as (Physical Downlink Share Channel, Physical Downlink Shared Channels);
GP is a guard time, does not transmit any data;
UpPTS is used for up, can be used to transmit signals such as RACH (Random AccessChannel, RACH), sounding (detection) pilot tone;
(3) subframe 2 is fixed for uplink.
Table 1 shows on 7 kinds of present LTE TDD configuration/the descending sub frame configuration, and wherein, DL/D representes descending, and UL/U representes up, and S representes the special time slot subframe.For example disposing 1 o'clock, subframe 2,3,7,8 are used for uplink, subframe 0,4,5,9 are used for downlink transfer, and the DwPTS part symbol in the special time slot subframe 1,6 also is used for downlink transfer simultaneously.
Table 1
Because inevitably hardware handles postpones, uplink ACK (Acknowledgement correctly replys) and NACK (Negative-Acknowledgement, wrong responses) transmit timing need pre-configured.Current LTE TDD regulation; Travelling carriage (subscriber equipment) receives the affirmation information A CK/NACK of data in the PDSCH of descending sub frame n should be at the sub-frame of uplink PUCCH of n+k (k＞3) (Physical Uplink Control Channel; Physical Uplink Control Channel) feed back in, and the PUCCH load of each sub-frame of uplink should be balanced.
Because the general characteristic of radio communication is that downlink traffic is bigger than upstream traffic; In LTE TDD system; The descending sub frame number that disposes in radio frames tends to more than the sub-frame of uplink number; This just means that a sub-frame of uplink need feed back the ACK/NACK information of a plurality of descending sub frame PDSCH, and table 2 shows when disposing like table 1, the number of the ACK/NACK of each sub-frame of uplink feeding back downlink PDSCH.
Table 2
Because the up needs of LTE satisfy single-carrier property, therefore the problem that must will solve is when descending number of sub frames disposes greater than the sub-frame of uplink number, how in a PUCCH, to feed back the ACK/NACK information of a plurality of descending sub frames effectively.
Summary of the invention
The present invention aims to provide a kind of feedback method of ascending response message, in a PUCCH, feeds back the low problem of ACK/NACK information efficiency of a plurality of descending sub frames to solve prior art.
According to the present invention, a kind of feedback method of ascending response message is provided.
Feedback method of ascending response message according to the embodiment of the invention comprises: receive the descending scheduling signaling from the base station, wherein, be provided with in the descending scheduling signaling to be used in reference to be shown in the feedback window and dispatch the bit counter to the descending sub frame number of travelling carriage; According to the content of PUCCH feedback, carry out with operation or carry out combined channel and encode and carry out the ascending response message feedback through response message N descending sub frame of feedback window, wherein, N is for feeding back the size of window.
Preferably, the content of PUCCH feedback is: response message.
Preferably; Carry out with operation or carry out combined channel and encode and carry out the ascending response message feedback and be specially through the response message of N descending sub frame: to (20 of the response message employing PUCCH format 2 of the N bit in the feedback window the feedback window; N) combined channel is encoded, and arranges the response message of N bit according to the sequencing of descending sub frame; Wherein, for the descending sub frame that is not scheduled, its corresponding response message is set to wrong responses.
Preferably, the content of PUCCH feedback is: response message, channel quality indication.
Preferably; Carry out with operation or carry out combined channel and encode and carry out the ascending response message feedback and be specially through the response message of N descending sub frame: the response message of N descending sub frame in the feedback window is carried out and operates the feedback window; Obtain the response message of 1 bit, carry out multiplexing through PUCCH format 2a the response message of channel quality indication and 1 bit; Wherein, for the descending sub frame that is not scheduled, its corresponding response message is set to correctly reply; And if the quantity of the quantity of the descending sub frame that receives and bit counter indication is inconsistent, then the response message of 1 bit is set to wrong responses.
Preferably, the content of PUCCH feedback is: response message, dispatch request indication.
Preferably; Carry out with operation or carry out combined channel and encode and carry out the ascending response message feedback and be specially through the response message of N descending sub frame: the response message of N descending sub frame in the feedback window is carried out and operates the feedback window; Obtain the response message of 1 bit, the response message of feedback 1 bit on the dispatch request PUCCH resource of distributing; Wherein, for the descending sub frame that is not scheduled, its corresponding response message is set to correctly reply; And if the quantity of the quantity of the descending sub frame that receives and bit counter indication is inconsistent, then the response message of 1 bit is set to wrong responses.
Preferably, the content of PUCCH feedback is: response message of in a sub-frame, sending and detecting pilot frequency signal.
Preferably; Carry out with operation or carry out combined channel and encode and carry out the ascending response message feedback and be specially through the response message of N descending sub frame the feedback window: to the response message of the N bit in the feedback window adopt PUCCH format 2 (20, combined channel N) is encoded and is carried out symbol-modulated; After removing the symbol that said detecting pilot frequency signal takies, carry response message on the PUCCH through the said N bit of ovennodulation.
Preferably; N≤4, the size of bit counter are
Preferably, for dicode word flow transmission, feedback 1 bit correctly replys under the situation of two code words of correct reception.
Through embodiments of the invention, improved the feedback efficiency of TDD system.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the frame structure sketch map according to the LTE system TDD mode of prior art;
Fig. 2 is the flow chart according to the feedback method of ascending response message of 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 explanation and explains the present invention, and be not used in qualification the present invention.
According to the embodiment of the invention, a kind of feedback method of ascending response message is provided.
In the present invention; According to LTE TDD system confirmed on/the ACK/NACK quantity of each sub-frame of uplink feedback of downlink transfer timing relationship regulation; To be defined as a feedback window at the descending sub frame that same sub-frame of uplink feeds back; Wherein, in each feedback window according to the ACK or the NACK of N descending sub frame of the sequencing of descending sub frame feedback.Be the performance of a plurality of ACK/NACK of transmission that guarantee Physical Uplink Control Channel, should limit the size of N, preferably N≤4.
And; Lose for avoiding downlink signaling; In each descending scheduling signaling, increase bit counter; This bit counter is used in reference to be shown in this feedback window dispatches the descending sub frame number of giving travelling carriage, and it is following that the size of this bit counter is preferably
is that example is described the present invention in detail with single codeword stream.
Fig. 2 is the flow chart according to the feedback method of ascending response message of the embodiment of the invention.As shown in Figure 2, this method comprises following processing:
Step S202, travelling carriage receives the descending scheduling signaling from the base station, wherein, is provided with in the descending scheduling signaling to be used in reference to be shown in the feedback window and dispatches the bit counter to the descending sub frame number of travelling carriage;
Step S204, travelling carriage be as required in the content of the PUCCH of sub-frame of uplink feedback, carries out with operation or carry out combined channel and encode and carry out the ascending response message feedback through the response message to N descending sub frame of feedback window, and wherein, N is for feeding back the size of window.
Content for PUCHH feedback can have multiple situation, below describes being directed to this respectively.
(1) need be in the content of PUCCH feedback: response message (ACK/NACK).
At this moment, in step S204, operate being specially: to the response message of the N bit of feedback in the window adopt PUCCH format 2 (20, combined channel coding N), and arrange the response message of N bit according to the sequencing of descending sub frame;
Wherein, no matter whether regularly corresponding descending sub frame PDSCH has data to be scheduled in the sub-frame of uplink feedback window, this sub-frame of uplink PUCCH all need feed back the N bit according to the corresponding ACK/NACK response message of the sequencing of descending sub frame; Wherein, for the descending sub frame that is not scheduled, its corresponding response message is set to NACK.
(2) need be in the content of PUCCH feedback: response message and channel quality indication (Channel Quality Indicator abbreviates CQI as).
Operation in step S204 is specially: the response message to the N bit in the feedback window carries out and operation, obtains the response message of 1 bit, carries out multiplexing through PUCCH format 2a the response message of channel quality indication and 1 bit; Wherein, for the descending sub frame that is not scheduled, its corresponding response message is set to ACK; And if travelling carriage does not receive the dispatch that send the base station at certain descending sub frame, that is, the quantity of the quantity of the descending sub frame that receives and bit counter indication is inconsistent, and then the response message of 1 bit is set to NACK.
(3) need be in the content of PUCCH feedback: response message and dispatch request indication (Scheduling Request Indicator abbreviates SRI as).
Operation among the step S204 is specially: the response message to the N bit in the feedback window carries out and operation; Obtain the response message of 1 bit; In the response message of distributing to feedback 1 bit on the SR of travelling carriage (Scheduling Request, dispatch request) the PUCCH resource; Wherein, for the descending sub frame that is not scheduled, its corresponding response message is set to ACK; And if the quantity of the quantity of the descending sub frame that receives and bit counter indication is inconsistent, then the response message of 1 bit is set to NACK.
(4) need be in the content of PUCCH feedback: response message of in a sub-frame, sending and detecting pilot frequency signal (Sound Reference Signal abbreviates SRS as).
Based on this, the operation among the step S204 is specially: to the response message of the N bit of feedback in the window adopt PUCCH format 2 (20, combined channel coding N) carries out symbol-modulated; After removing the symbol that said detecting pilot frequency signal takies, carry response message on the PUCCH through the said N bit of ovennodulation.
Based on above processing, for dicode word flow transmission, two code words of transmission adopt and operational feedback 1 bit ACK or NACK simultaneously, and promptly two code words all are moved platform and correctly receive and just feed back 1 bit ACK information; Reply message feedback method with aforementioned single codeword stream is identical in addition.
The base station can start or stop travelling carriage through high-level signaling and carry out above-mentioned feedback through the type of service of the current descending use of detecting travelling carriage.If the base station detects the transport service (like FTP, Video Stream) that travelling carriage has started some continuous high data volume, this moment the base station initiatively through but do not limit the RRC signaling travelling carriage of this kind signaling to carry out many ACK/NACK to report; If the base station detects the business that travelling carriage has only started discontinuous transmission data, professional such as the VoIP of continuous dispatching, then many ACK/NACK feedback model is closed through the signaling travelling carriage in the base station.
In sum, according to the feedback method of ascending response message of the embodiment of the invention, travelling carriage can be known the subframe that any descending scheduling signaling is lost in the feedback window and handle, effectively improve the feedback efficiency of TDD system.
Obviously, it is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize with the general calculation device; They can concentrate on the single calculation element; Perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element; Thereby; Can they be stored in the storage device and carry out, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize by calculation element.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is merely 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 changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a feedback method of ascending response message is characterized in that, comprising:
Travelling carriage receives the descending scheduling signaling from the base station; Wherein, Be provided with in the said descending scheduling signaling to be used in reference to be shown in the feedback window and dispatch the bit counter to the descending sub frame number of travelling carriage, wherein, said feedback window is meant the descending sub frame that feeds back at same sub-frame of uplink;
The content that travelling carriage feeds back at the Physical Uplink Control Channel PUCCH of sub-frame of uplink as required; Carry out with operation or carry out combined channel and encode and carry out ascending response message and feed back through the response message of N descending sub frame the feedback window; Wherein, N is the size of said feedback window.
2. method according to claim 1 is characterized in that, saidly need be in the content of PUCCH feedback: response message.
3. method according to claim 2 is characterized in that, saidly carries out with operation or carries out combined channel and encode and carry out ascending response message and feed back and be specially through the response message of N descending sub frame to the feedback window:
To the response message of the N bit in the said feedback window adopt PUCCH format2 (20, combined channel coding N), and arrange the response message of said N bit according to the sequencing of descending sub frame;
Wherein, for the descending sub frame that is not scheduled, its corresponding response message is set to wrong responses.
4. method according to claim 1 is characterized in that, saidly need be in the content of PUCCH feedback: response message, channel quality indication.
5. method according to claim 4 is characterized in that, saidly carries out with operation or carries out combined channel and encode and carry out ascending response message and feed back and be specially through the response message of N descending sub frame to the feedback window:
Response message to the N bit in the said feedback window carries out and operation, obtains the response message of 1 bit, carries out multiplexing through PUCCH format 2a the response message of said channel quality indication and said 1 bit;
Wherein, for the descending sub frame that is not scheduled, its corresponding response message is set to correctly reply; And if the quantity of the quantity of the descending sub frame that receives and the indication of said bit counter is inconsistent, the response message of then said 1 bit is set to wrong responses.
6. method according to claim 1 is characterized in that, saidly need be in the content of PUCCH feedback: response message, dispatch request indication.
7. method according to claim 6 is characterized in that, saidly carries out with operation or carries out combined channel and encode and carry out ascending response message and feed back and be specially through the response message of N descending sub frame to the feedback window:
Response message to the N bit in the said feedback window carries out and operation, obtains the response message of 1 bit, the response message of said 1 bit of feedback on the dispatch request PUCCH resource of distributing;
Wherein, for the descending sub frame that is not scheduled, its corresponding response message is set to correctly reply; And if the quantity of the quantity of the descending sub frame that receives and the indication of said bit counter is inconsistent, the response message of then said 1 bit is set to wrong responses.
8. method according to claim 1; It is characterized in that; Said need be at response message and the detecting pilot frequency signal of content in a sub-frame, sending of PUCCH feedback, saidly carry out and operate or carry out combined channel and encode and carry out ascending response message and feed back and be specially through response message to N descending sub frame of feedback window:
To the response message of the N bit in the said feedback window adopt PUCCH format2 (20, combined channel coding N) carries out symbol-modulated;
After removing the symbol that said detecting pilot frequency signal takies, carry response message on the PUCCH through the said N bit of ovennodulation.
9. according to each described method in the claim 1 to 8; It is characterized in that; N≤4, the size of said bit counter are
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| CN103036660B (en) * | 2010-04-30 | 2015-09-16 | 北京三星通信技术研究有限公司 | A kind of method of feedback data acceptance state |
| CN101951684B (en) * | 2010-09-30 | 2015-08-12 | 中兴通讯股份有限公司 | A kind of sending method of confirmation and user terminal |
| KR101835330B1 (en) | 2010-11-02 | 2018-03-07 | 엘지전자 주식회사 | Method and device for transmitting/receiving uplink control information in wireless communication system |
| US9344999B2 (en) | 2010-11-11 | 2016-05-17 | Lg Electronics Inc. | Uplink control information transmitting/receiving method and device in a wireless communication system |
| CN105978660B (en) * | 2010-11-11 | 2019-06-25 | Lg电子株式会社 | Uplink control information transmitting/the method for reseptance and device of wireless communication system |
| CN101989898A (en) * | 2010-11-15 | 2011-03-23 | 中兴通讯股份有限公司 | Method and device for transmitting response message |
| CN102594493B (en) | 2011-01-17 | 2014-08-20 | 华为技术有限公司 | Response message encoding, process method and device |
| CN103701556B (en) * | 2012-09-27 | 2017-02-22 | 中国移动通信集团公司 | CSI-RS (channel state information-reference signal)-based CSI feedback method and equipment |
| WO2014201690A1 (en) * | 2013-06-21 | 2014-12-24 | 华为技术有限公司 | Counting method and device based on drx timer in tdd mode |
| CN109845158B (en) * | 2016-11-21 | 2021-11-12 | 富士通株式会社 | Method, device and communication system for feeding back data transmission confirmation |
| US20220338172A1 (en) * | 2019-09-12 | 2022-10-20 | Ntt Docomo, Inc. | Terminal and communication method |
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