CN101309522B - Uplink reply message feedback method and mobile terminal - Google Patents
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Abstract
The invention discloses a method for feeding back uplink response messages and the mobile terminal thereof, wherein the method comprises a response message which is arranged in advance, used for a feedback window and is less than two bits; the bits of the response message are configured by user equipment according to the obtained resource distributing information of the last downlink dispatching distributing subframe, and one bit is corresponding to one or two downlink subframes; each bit value is arranged through operating the receiving condition of the downlink subframe corresponding to each bit; and then the response messages are transmitted. The frequency spectrum utilization ratio of the TDD system can be improved by using the method.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of feedback method of ascending response message and portable terminal.
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 special 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 special 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 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 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.
Current LTE TDD system definition the feedback window notion, that is, and according to last/downlink transfer timing relationship regulation will be defined as at the descending sub frame that same sub-frame of uplink feeds back one the feedback window.Feedback all scheduling subframes in the window are through returning the ACK/NACK of 1 bit with operation, and increase in each descending scheduling assignment signalling that 2 bit resource allocation informations (can indicate 4 kinds of situations) have been indicated in the feedback window or the scheduling number of subframes of giving travelling carriage altogether.But employing is to have caused a large amount of unnecessary retransmission with a shortcoming of operation, has reduced the throughput of system greatly.
In realizing process of the present invention, the inventor finds that method that prior art utilizes up PUCCH to send the ACK/NACK of a plurality of descending sub frames has reduced the throughput of system.
Summary of the invention
The present invention aims to provide a kind of feedback method of ascending response message and portable terminal, sends the problem of the response message waste system resource of descending sub frame to solve prior art.
According to an aspect of the present invention, a kind of feedback method of ascending response message is provided.
According to the feedback method of ascending response message of the embodiment of the invention, be applied to LTE TDD system, comprising: subscriber equipment is provided for the response message that is no more than 2 bits of a feedback window in advance; Subscriber equipment distributes the bit of the resource allocation information value configuration response message of subframe according to last descending scheduling that obtains, and wherein, a bit is corresponding to one or two descending sub frame; Subscriber equipment is through carrying out being provided with operation the value of each bit to the reception condition of the corresponding descending sub frame of each bit; Subscriber equipment sends response message.
Preferably, subscriber equipment distributes the bit of the resource allocation information value configuration response message of subframe specifically to comprise according to last descending scheduling that obtains: be under 1 the situation, response message to be configured to take 1 bit in the resource allocation information value; Be under 2 the situation, response message to be configured to take 2 bits in the resource allocation information value, wherein, the 1st corresponding first descending sub frame of bit, the 2nd corresponding second descending sub frame of bit; Be under 3 the situation, response message to be configured to take 2 bits in the resource allocation information value, wherein, the 1st corresponding first and second descending sub frames of bit, the 2nd corresponding the 3rd descending sub frame of bit; Perhaps corresponding first descending sub frame of the 1st bit, the 2nd corresponding second and the 3rd descending sub frame of bit; Be under 4 the situation, response message to be configured to take 2 bits in the resource allocation information value, wherein, the 1st corresponding first and second descending sub frames of bit, the 2nd corresponding third and fourth descending sub frame of bit.
Preferably; Feed back under the situation of the number of subframes of distributing to subscriber equipment in the window altogether in the resource allocation information indication; This method also comprises: if the quantity of resource allocation information value and the subframe that solved is inconsistent, then confirm the subframe of losing according to the quantity of resource allocation information value and the subframe that solved.
Preferably; Feed back under the situation of the number of subframes of having distributed to subscriber equipment in the window in the resource allocation information indication; Method also comprises: if continuous two resource allocation information values that subscriber equipment receives are discontinuous, then confirm the subframe of losing according to discontinuous resource allocation information value.
Preferably; Reception condition comprises that correct reception receives with wrong; Value through the reception condition of the corresponding descending sub frame of each bit being carried out be provided with operation each bit specifically comprises: be under 1 the situation in the resource allocation information value; When descending sub frame correctly received, response message was for correctly replying; Be that when first descending sub frame correctly received, the 1st bit was set to correctly reply under 2 the situation in the resource allocation information value; When second descending sub frame correctly received, the 2nd bit was set to correctly reply; Be that when first and second descending sub frames all correctly received, the 1st bit was set to correctly reply under 3 the situation in the resource allocation information value, when the 3rd descending sub frame correctly received, the 2nd bit was set to correctly reply; Perhaps when first descending sub frame correctly received, the 1st bit was set to correctly reply, and when second and the 3rd descending sub frame all correctly received, the 2nd bit was set to correctly reply; Be that when first and second descending sub frames all correctly received, the 1st bit was set to correctly reply under 4 the situation in the resource allocation information value, when third and fourth descending sub frame all correctly received, the 2nd bit was set to correctly reply.
Preferably, this method also comprises: if the base station does not solve the response message of subscriber equipment feedback on the physical uplink control channel resource of expectation, then automatic repeat requests is mixed with the subframe in its feedback window that has sent in the base station.
Preferably, for dicode word flow transmission, subscriber equipment feeds back the correct response message of 1 bit for two code words of correct reception.
According to another aspect of the present invention, a kind of portable terminal is provided also.
According to the portable terminal of the embodiment of the invention, be applied to LTE TDD system, comprising: module is set, is used for being provided in advance the response message that is no more than 2 bits of a feedback window; Configuration module is used for distributing the resource allocation information value of subframe to dispose the bit of response message according to last descending scheduling that obtains, and wherein, a bit is corresponding to one or more descending sub frames; Operational module is used for through the reception condition of the corresponding descending sub frame of each bit being carried out being provided with operation the value of each bit; Sending module is used to send response message.
Through the above embodiment of the present invention, through sending a plurality of response messages simultaneously, can avoid unnecessary retransmission, thereby improve the availability of frequency spectrum of TDD system at an ascending control channel.
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 sketch map according to the frame structure of 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;
Fig. 3 is the block diagram according to the portable terminal 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.
Method embodiment
The embodiment of the invention provides a kind of feedback method of ascending response message.In the method, in order to reduce the loss of the throughput of system that unnecessary retransmission brings, restriction is carried out being no more than 2 with the number of the ACK/NACK of operation.
Fig. 2 shows the feedback method of ascending response message according to the embodiment of the invention, and this method comprises following processing:
Step S202 is provided for a response message that is no more than 2 bits of feeding back window in advance;
Step S204, subscriber equipment distributes the bit of the resource allocation information value configuration response message of subframe according to last descending scheduling that obtains, and wherein, a bit is corresponding to one or two descending sub frame;
Step S206 is through carrying out being provided with operation the value of each bit to the reception condition of the corresponding descending sub frame of each bit;
Step S208 sends response message.
Can find out through above description; In prior art, all the scheduling subframes in the feedback window are all carried out and the way of operating feeding back ACK/NACK; The present invention can avoid a large amount of unnecessary retransmission through maximum two scheduling subframes are carried out and operation.
Below be that example describes with LTE TDD system single codeword stream.Wherein, the maximum feedback window is 4 descending sub frames, increases by 2 bit resource allocation informations in each descending scheduling assignment signalling.
Wherein, step S204 specifically comprises:
Be under 1 the situation, response message to be configured to take 1 bit in the resource allocation information value, that is, UE adopts PUCCH format 1a feeding back ACK/NACK;
Be under 2 the situation, response message to be configured to take 2 bits in the resource allocation information value, that is, and two response messages, wherein, the 1st corresponding first descending sub frame of bit, the 2nd corresponding second descending sub frame of bit;
Be under 3 the situation, response message to be configured to take 2 bits in the resource allocation information value, that is, and two response messages, wherein, the 1st corresponding first and second descending sub frames of bit, the 2nd corresponding the 3rd descending sub frame of bit; Perhaps corresponding first descending sub frame of the 1st bit, the 2nd corresponding second and the 3rd descending sub frame of bit;
Be under 4 the situation, response message to be configured to take 2 bits in the resource allocation information value, that is, and two response messages, wherein, the 1st corresponding first and second descending sub frames of bit, the 2nd corresponding third and fourth descending sub frame of bit.
In addition; In the feedback window; UE is after receiving last scheduling downlink resource information; In resource allocation information indication feedback window, distribute to altogether under the situation of number of subframes of subscriber equipment,, then confirm the subframe of losing according to the quantity of resource allocation information value and the subframe that solved if the quantity of resource allocation information value and the subframe that solved is inconsistent; In resource allocation information indication feedback window, distributed under the situation of number of subframes of subscriber equipment,, then confirmed the subframe of losing according to discontinuous resource allocation information value if continuous two resource allocation information values that subscriber equipment receives are discontinuous; For the subframe feedback NACK message of losing.Can find out that in embodiments of the present invention, travelling carriage can be known the subframe that the descending scheduling signaling is lost in the feedback window, thereby improve the availability of frequency spectrum of TDD system.
Based on foregoing, step S206 specifically comprises:
Be that when descending sub frame correctly received, response message was for correctly replying under 1 the situation in the resource allocation information value;
Be that when first descending sub frame correctly received, the 1st bit was set to correctly reply under 2 the situation in the resource allocation information value; When second descending sub frame correctly received, the 2nd bit was set to correctly reply;
Be that when first and second descending sub frames all correctly received, the 1st bit was set to correctly reply under 3 the situation in the resource allocation information value, when the 3rd descending sub frame correctly received, the 2nd bit was set to correctly reply; Perhaps when first descending sub frame correctly received, the 1st bit was set to correctly reply, and when second and the 3rd descending sub frame all correctly received, the 2nd bit was set to correctly reply;
Be that when first and second descending sub frames all correctly received, the 1st bit was set to correctly reply under 4 the situation in the resource allocation information value, when third and fourth descending sub frame all correctly received, the 2nd bit was set to correctly reply.
Based on above processing; If the base station does not solve the response message of subscriber equipment feedback on the physical uplink control channel resource of expectation; Then HARQ (Hybrid Automatic Repeat Request mixes automatic repeat requests) is carried out with the subframe in its feedback window that has sent in the base station.
By means of the embodiment of the invention, through maximum two scheduling subframes are carried out and operation, and, can when guaranteeing feedback efficiency, reduce loss of throughput according to the bit of response message being set with operating result.
Preferably, for dicode word flow transmission, two code words of transmission simultaneously adopt and operational feedback 1 bit ACK or NACK, and promptly two code words are all correctly received by subscriber equipment and just feed back 1 bit ACK information; Reply message feedback method with aforementioned single codeword stream is identical in addition.
According to the abovementioned embodiments of the present invention, can send a plurality of response messages simultaneously, can avoid unnecessary retransmission, and can realize the compromise of feedback efficiency and loss of throughput at an ascending control channel.
Device embodiment
The embodiment of the invention also provides a kind of portable terminal.
Fig. 3 shows the portable terminal according to the embodiment of the invention, and this portable terminal comprises: module 10 is set, is used for being provided in advance the response message that is no more than 2 bits of a feedback window; Configuration module 20 is used for distributing the resource allocation information value of subframe to dispose the bit of response message according to last descending scheduling that obtains, and wherein, a bit is corresponding to one or more descending sub frames; Operational module 30, respectively with module 10 be set be connected with configuration module 20, be used for through the reception condition of the corresponding descending sub frame of each bit being carried out being provided with operation the value of each bit; Sending module 40 is used to send response message.
In sum,,, can avoid a large amount of unnecessary retransmission, thereby improve the availability of frequency spectrum of TDD system through sending a plurality of response messages simultaneously at an ascending control channel through the above embodiment of the present invention.
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 (8)
1. a feedback method of ascending response message is applied to LTE TDD system, it is characterized in that, comprising:
Subscriber equipment is provided for the response message that is no more than 2 bits of a feedback window in advance;
Said subscriber equipment distributes the resource allocation information value of subframe to dispose the bit of said response message according to last descending scheduling that obtains, and wherein, a bit is corresponding to one or two descending sub frame;
Said subscriber equipment is through carrying out being provided with operation the value of each bit to the reception condition of the corresponding descending sub frame of each bit;
Said subscriber equipment sends said response message.
2. method according to claim 1 is characterized in that, said subscriber equipment specifically comprises according to the bit that last descending scheduling that obtains distributes the resource allocation information value of subframe to dispose said response message:
Be under 1 the situation, said response message to be configured to take 1 bit in said resource allocation information value;
Be under 2 the situation, said response message to be configured to take 2 bits in said resource allocation information value, wherein, the 1st corresponding first descending sub frame of bit, the 2nd corresponding second descending sub frame of bit;
Be under 3 the situation, said response message to be configured to take 2 bits in said resource allocation information value, wherein, the 1st corresponding first and second descending sub frames of bit, the 2nd corresponding the 3rd descending sub frame of bit; Perhaps corresponding first descending sub frame of the 1st bit, the 2nd corresponding second and the 3rd descending sub frame of bit;
Be under 4 the situation, said response message to be configured to take 2 bits in said resource allocation information value, wherein, the 1st corresponding first and second descending sub frames of bit, the 2nd corresponding third and fourth descending sub frame of bit.
3. method according to claim 2 is characterized in that, indicates under the situation of the number of subframes of distributing to said subscriber equipment in the said feedback window altogether at said resource allocation information, and said method also comprises:
If the quantity of said resource allocation information value and the subframe that solved is inconsistent, then confirm the subframe of losing according to the quantity of said resource allocation information value and the subframe that solved.
4. method according to claim 2 is characterized in that, indicates under the situation of the number of subframes of having distributed to said subscriber equipment in the said feedback window at said resource allocation information, and said method also comprises:
If continuous two resource allocation information values that said subscriber equipment receives are discontinuous, then confirm the subframe of losing according to discontinuous said resource allocation information value.
5. according to claim 3 or 4 described methods, it is characterized in that said reception condition comprises that correct reception receives with wrong, saidly specifically comprise through the value of the reception condition of the corresponding descending sub frame of each bit being carried out be provided with each bit with operation:
Be that when descending sub frame correctly received, said response message was for correctly replying under 1 the situation in said resource allocation information value;
Be that when first descending sub frame correctly received, the 1st bit was set to correctly reply under 2 the situation in said resource allocation information value; When second descending sub frame correctly received, the 2nd bit was set to correctly reply;
Be that when first and second descending sub frames all correctly received, the 1st bit was set to correctly reply under 3 the situation in said resource allocation information value, when the 3rd descending sub frame correctly received, the 2nd bit was set to correctly reply; Perhaps when first descending sub frame correctly received, the 1st bit was set to correctly reply, and when second and the 3rd descending sub frame all correctly received, the 2nd bit was set to correctly reply;
Be that when first and second descending sub frames all correctly received, the 1st bit was set to correctly reply under 4 the situation in said resource allocation information value, when third and fourth descending sub frame all correctly received, the 2nd bit was set to correctly reply.
6. method according to claim 1 is characterized in that, also comprises:
If the base station does not solve the response message of said subscriber equipment feedback on the physical uplink control channel resource of expectation, automatic repeat requests is mixed with the subframe in its feedback window that has sent in then said base station.
7. according to claim 5 or 6 described methods, it is characterized in that for dicode word flow transmission, said subscriber equipment feeds back the correct response message of 1 bit for two code words of correct reception.
8. a portable terminal is applied to LTE TDD system, it is characterized in that, comprising:
Module is set, is used for being provided in advance the response message that is no more than 2 bits of a feedback window;
Configuration module is used for distributing the resource allocation information value of subframe to dispose the bit of said response message according to last descending scheduling that obtains, and wherein, a bit is corresponding to one or more descending sub frames;
Operational module is used for through the reception condition of the corresponding descending sub frame of each bit being carried out being provided with operation the value of each bit;
Sending module is used to send said response message.
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| CN101777971A (en) * | 2009-01-08 | 2010-07-14 | 中兴通讯股份有限公司 | Information feedback method, system and user equipment |
| CN101488832B (en) * | 2009-01-19 | 2013-11-06 | 中兴通讯股份有限公司 | Channel detecting and processing method, terminal and base station |
| CN101478383B (en) * | 2009-02-03 | 2014-03-19 | 中兴通讯股份有限公司 | Feedback method for downlink sub-frame response information in long-term evolution system |
| CN102098140A (en) * | 2009-12-10 | 2011-06-15 | 华为技术有限公司 | Data transmission method, equipment and system in uplink MIMO mode |
| CN102404801A (en) * | 2010-09-17 | 2012-04-04 | 华为技术有限公司 | Method and device of data transmission feedback |
| 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 |
| WO2012106840A1 (en) * | 2011-02-10 | 2012-08-16 | Renesas Mobile Corporation | Resource allocation for flexible tdd configuration |
| CN107113117B (en) * | 2015-04-17 | 2021-04-20 | 华为技术有限公司 | Information feedback method, equipment and system |
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| CN1635729A (en) * | 2003-12-26 | 2005-07-06 | 北京三星通信技术研究有限公司 | Method for Transmitting Response Signal Using Common Channel |
| CN1951137A (en) * | 2004-05-07 | 2007-04-18 | 松下电器产业株式会社 | Base station apparatus |
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| CN1635729A (en) * | 2003-12-26 | 2005-07-06 | 北京三星通信技术研究有限公司 | Method for Transmitting Response Signal Using Common Channel |
| CN1951137A (en) * | 2004-05-07 | 2007-04-18 | 松下电器产业株式会社 | Base station apparatus |
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