CN103873211A - HARQ retransmission and blind detection method - Google Patents
HARQ retransmission and blind detection method Download PDFInfo
- Publication number
- CN103873211A CN103873211A CN201210530131.1A CN201210530131A CN103873211A CN 103873211 A CN103873211 A CN 103873211A CN 201210530131 A CN201210530131 A CN 201210530131A CN 103873211 A CN103873211 A CN 103873211A
- Authority
- CN
- China
- Prior art keywords
- data
- packet
- transmitting terminal
- nack
- ack
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Detection And Prevention Of Errors In Transmission (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The application discloses an HARQ retransmission and blind detection method. A transmitting end waits for a positive acknowledgement (ACK) or a negative acknowledgement (NACK) every time after transmitting a data packet; if an ACK is received, the transmitting end transmits the next new data packet; and if an NACK is received without exceeding a maximum number of times of retransmission, the transmitting end adopts a Chase mechanism for retransmission, i.e., the transmitting end retransmits the same data packet every time, and adopts the same modulation coding mode. In a period of data transmission, no signaling including indication of new and old data is notified to a receiving end, and no signaling including the maximum number of times of retransmission is notified to the receiving end. The receiving end performs blind HARQ merging detection on a specific channel transmission format. By applying the technical scheme of the application, extra signaling support is not needed, and the purpose of improving performance of the specific channel transmission format can be achieved.
Description
Technical field
The application relates to mobile communication technology field, and particularly mixed automatic retransfer request (HARQ) technology relates in particular to a kind of HARQ and retransmits and blind checking method.
Background technology
In mobile communication, along with the continuous expansion of communication service and the raising of service quality, the reliability of communication will be proposed to higher requirement.And in mobile communication system, wireless channel is the channel that a kind of parameter changes often, its residing environment is also very complicated.For receiving terminal, the error code that channel fading and various interference cause has random error and burst error, can major injury communication quality.Therefore, in mobile communication system, must adopt error-control technique to improve the transmission quality of signal, thus the transmitting of guarantee information.The error-control technique extensively adopting is at present mixed automatic retransfer request (HARQ) technology.
HARQ technology is the error control method that HARQ (ARQ) technology and forward error correction (FEC) technology combine.HARQ introduces a FEC subsystem in ARQ system, and the error of transmission that FEC subsystem is used for correcting normal appearance, to reduce number of retransmissions, is automatically corrected a mistake within the scope of error correcting capability, and exceeding error correction scope just needs to retransmit.
HARQ in Long Term Evolution project (LTE) system has adopted stop-and-wait protocol (Stop & Wait, SW).In SW mechanism, transmitting terminal is waited for an affirmative acknowledgement (ACK) or negative response (NACK) often distributing after a packet.If receive ACK, transmitting terminal sends next new data packet, if receive NACK, resends a packet.In order to prevent mistake when ACK/NACK receives, when transmission new data, send Downlink Control Information (DCI), in DCI, comprise a new data indication information (NDI), just only have NDI can initiate the transmission of new data at 1 o'clock.Because DCI information has CRC check, therefore can guarantee that the error probability of NDI is very low.The situation that so just can avoid ACK/NACK communication to make mistakes.
In private network communication system, resource-constrained, equipment is simple.For saving resource, adopt semi-static transmission means, base station by DCI to terminal distribution after up-downgoing resource, generally no longer send new control information, terminal transmits the resource that takies distribution always until notified stopping.The ACK/NACK information of transmission data returns to transmitting terminal by receiving terminal, and transmitting terminal still retransmits legacy data according to ACK/NACK information judgement transmission new data again.
In some private network communication system, owing to having adopted semi-static transmission means, in the time of transmission new data, cannot as LTE system, indicate by the NDI information in DCI, and the ACK/NACK information that can only feed back by receiving terminal judges.ACK/NACK information may be made mistakes in the time of transmission, and receiving terminal has returned to NACK, and transmitting terminal has but received into ACK, and vice versa.If what receiving terminal returned is ACK information, and transmitting terminal has received NACK, at this moment transmitting terminal can retransmit the data that receiving terminal has correctly received, and receiving terminal repeats to receive identical data.In this case, after the Data duplication that receiving terminal is found to receive, can lose the data of repetition, so can not have problems.If but receiving terminal has returned to nack message to transmitting terminal, transmitting terminal is ACK information NACK flase drop, and this situation will produce serious problem.At this moment, transmitting terminal sends new data, is data retransmission and the data of twice reception are merged and receiving terminal is thought reception, and result will cause cannot correctly receiving of data.
Address this problem two kinds of solutions of available technology adopting:
The first scheme, uses for reference the method adopting in LTE system, in DCI, adds NDI information, while sending new data, transmits at every turn.Because PDCCH has CRC check, therefore can avoid above-mentioned problem.But shortcoming is in private network system, the poor-performing of Physical Downlink Control Channel (PDCCH).The resource that the PDCCH of private network can take is less, so although the NDI information of just 1 bit of transmission add behind CRC check position, will make code check improve, the receptivity of PDCCH reduces, system effectiveness also can decrease.
First scheme, receiving terminal does not remerge data retransmission, and receiving terminal receives separately each data retransmission.Although so also can avoid the problems referred to above, can lose and retransmit the diversity gain merging.
Summary of the invention
The application provides a kind of HARQ to retransmit and blind checking method, can, without reducing system effectiveness, also can not lose and retransmit the diversity gain merging.
A kind of HARQ that the embodiment of the present application provides retransmits and blind checking method, comprising:
At transmitting terminal, wait for an affirmative acknowledgement ACK or negative response NACK after often distributing a packet; If receive ACK or reached maximum retransmission, transmitting terminal sends next new data packet; If receive NACK and do not exceed maximum retransmission, transmitting terminal is retransmitted and last same packet, and adopts and last same modulation coding mode;
At receiving terminal, carry out following flow process:
After A, a packet of reception, the data of this reception of decoding separately;
B, judge whether to receive correct, if so, perform step C, otherwise execution step D;
C, to transmitting terminal feeding back ACK, notebook data grouping is set can not mergedly be indicated; Return to steps A;
Whether the data of the previous packet of identical HARQ process that D, judgement have received can be merged; If so, perform step F, otherwise execution step E;
E, to transmitting terminal feedback NACK, the data of minute book packet, and notebook data grouping is set can mergedly indicates; Return to steps A;
F, a packet of this reception is carried out to HARQ merging with the described previous packet of identical HARQ process having received;
G, judge merge after decoding whether correct, if so, perform step H, otherwise execution step I;
H, to transmitting terminal feeding back ACK, notebook data grouping is set can not mergedly be indicated; Return to steps A;
I, to transmitting terminal feedback NACK, the data of minute book packet, and notebook data grouping is set can mergedly indicates; Return to steps A.
Preferably, described step D further comprises:
D1, judge receive data whether be the particular channel transformat that will receive; If so, perform step D3, otherwise execution step D2;
D2, to transmitting terminal feedback NACK, notebook data grouping is set can not mergedly be indicated; Return to steps A;
Whether the data of the identical HARQ process that D3, judgement have received can be merged; If so, perform step F, otherwise execution step E.
Preferably, described particular channel transformat can be any one form of Downlink Control Information in any one coded modulation form of Physical Downlink Shared Channel or down control channel.
Preferably, the channel of receiving terminal feeding back ACK or NACK is Physical Uplink Control Channel.
Preferably, during transmission data, do not comprise the signaling receiving terminal of new legacy data indication, do not comprise the signaling receiving terminal of maximum retransmission yet.
As can be seen from the above technical solutions, transmitting terminal, in the time of data retransmission, is retransmitted same packet at every turn, and adopts same modulation coding mode, and receiving terminal carries out blind HARQ to specific transmission form and merges detection.This scheme does not need extra signaling support, can reach again the object that improves specific transmission form performance.
Accompanying drawing explanation
A kind of HARQ that Fig. 1 provides for the embodiment of the present application retransmit and blind checking method in the handling process of receiving terminal.
Embodiment
The application provides a kind of HARQ to retransmit and blind checking method, and its basic thought is: transmitting terminal is waited for an affirmative acknowledgement (ACK) or negative response (NACK) often distributing after a packet; If receive ACK, transmitting terminal sends next new data packet; If receive NACK, and do not exceed maximum retransmission, transmitting terminal retransmits the Chase mechanism that adopts, and transmitting terminal is each retransmits same packet, and adopts same modulation coding mode.During sending data, do not comprise the signaling receiving terminal that new legacy data is indicated, do not comprise the signaling receiving terminal of maximum retransmission yet.Receiving terminal carries out blind HARQ to specific transmission form and merges detection.
The HARQ retransmission mechanism that the application provides guarantees that the data that retransmit are the data that repeat completely, merge detection by specific transmission form being carried out to blind HARQ, do not need extra signaling support, can reach again the object that improves specific transmission form performance.
For making know-why, feature and the technique effect of present techniques scheme clearer, below in conjunction with specific embodiment, present techniques scheme is described in detail.
A kind of HARQ that the embodiment of the present application provides retransmits and blind checking method, at transmitting terminal, waits for an affirmative acknowledgement (ACK) or negative response (NACK) after often distributing a packet; If receive ACK or reached maximum retransmission, transmitting terminal sends next new data packet; If receive NACK and do not exceed maximum retransmission, transmitting terminal retransmits the Chase mechanism that adopts, and transmitting terminal is each retransmits and last same packet, and adopts and last same modulation coding mode.During sending data, do not comprise the signaling receiving terminal that new legacy data is indicated, do not comprise the signaling receiving terminal of maximum retransmission yet.
At receiving terminal, carry out flow process as shown in Figure 1:
Step 101: receive after a packet data of this reception of decoding separately.
Step 102: judge whether to receive correctly, if so, perform step 103, otherwise execution step 104.
Step 103: to transmitting terminal feeding back ACK, notebook data grouping is set can not mergedly be indicated, flag=0; Return to step 101 and prepare to receive new packet.
Step 104: judge whether the data that receive are the particular channel transformats that will receive; If so, perform step 106, otherwise execution step 105.
Step 105: to transmitting terminal feedback NACK, notebook data grouping is set can not mergedly be indicated, flag=0; Return to step 101 and prepare to receive new packet.
Step 106: whether the data of the previous packet of identical HARQ process that judgement has received can be merged; If so, perform step 108, otherwise execution step 107.
Step 107: if being masked as of the packet of the identical HARQ process having received can not be merged, feed back NACK, the data of minute book packet, and notebook data grouping is set can mergedly indicates, flag=1; Return to step 101 and prepare to receive retransmitted data packet.
Step 108: if being masked as of the previous packet of the identical HARQ process having received can be merged, a packet packet previous with the identical HARQ process receiving of this reception is carried out to HARQ merging.
Step 109: judge that whether merging decoding is afterwards correct, if so, perform step 110, otherwise execution step 111.
Step 110: to transmitting terminal feeding back ACK, notebook data grouping is set can not mergedly be indicated, flag=0; Return to step 101 and prepare to receive new packet.
Step 111: to transmitting terminal feedback NACK, the data of minute book packet, and notebook data grouping is set can mergedly indicates, flag=1; Return to step 101 and prepare to receive retransmitted data packet.
In a typical application scenarios of the embodiment of the present application, the particular channel transformat that receiving terminal will receive is any one form of Downlink Control Information in any one coded modulation form of Physical Downlink Shared Channel (PDSCH) or down control channel, and the channel of receiving terminal feeding back ACK or NACK is Physical Uplink Control Channel (PUCCH).
The foregoing is only the application's preferred embodiment; not in order to limit the application's protection range; all within the spirit and principle of present techniques scheme, any modification of making, be equal to replacement, improvement etc., within all should being included in the scope of the application's protection.
Claims (5)
1. HARQ retransmits and a blind checking method, it is characterized in that, comprising:
At transmitting terminal, wait for an affirmative acknowledgement ACK or negative response NACK after often distributing a packet; If receive ACK or reached maximum retransmission, transmitting terminal sends next new data packet; If receive NACK and do not exceed maximum retransmission, transmitting terminal is retransmitted and last same packet, and adopts and last same modulation coding mode;
At receiving terminal, carry out following flow process:
After A, a packet of reception, the data of this reception of decoding separately;
B, judge whether to receive correct, if so, perform step C, otherwise execution step D;
C, to transmitting terminal feeding back ACK, notebook data grouping is set can not mergedly be indicated; Return to steps A;
Whether the data of the previous packet of identical HARQ process that D, judgement have received can be merged; If so, perform step F, otherwise execution step E;
E, to transmitting terminal feedback NACK, the data of minute book packet, and notebook data grouping is set can mergedly indicates; Return to steps A;
F, a packet of this reception is carried out to HARQ merging with the described previous packet of identical HARQ process having received;
G, judge merge after decoding whether correct, if so, perform step H, otherwise execution step I;
H, to transmitting terminal feeding back ACK, notebook data grouping is set can not mergedly be indicated; Return to steps A;
I, to transmitting terminal feedback NACK, the data of minute book packet, and notebook data grouping is set can mergedly indicates; Return to steps A.
2. method according to claim 1, is characterized in that, described step D further comprises:
D1, judge receive data whether be the particular channel transformat that will receive; If so, perform step D3, otherwise execution step D2;
D2, to transmitting terminal feedback NACK, notebook data grouping is set can not mergedly be indicated; Return to steps A;
Whether the data of the identical HARQ process that D3, judgement have received can be merged; If so, perform step F, otherwise execution step E.
3. method according to claim 2, is characterized in that, described particular channel transformat can be any one form of Downlink Control Information in any one coded modulation form of Physical Downlink Shared Channel or down control channel.
4. method according to claim 3, is characterized in that, the channel of receiving terminal feeding back ACK or NACK is Physical Uplink Control Channel.
5. according to the method described in claim 1 to 4 any one, it is characterized in that, during transmission data, do not comprise the signaling receiving terminal of new legacy data indication, also do not comprise the signaling receiving terminal of maximum retransmission.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210530131.1A CN103873211B (en) | 2012-12-10 | 2012-12-10 | A kind of HARQ is retransmitted and blind checking method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210530131.1A CN103873211B (en) | 2012-12-10 | 2012-12-10 | A kind of HARQ is retransmitted and blind checking method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103873211A true CN103873211A (en) | 2014-06-18 |
| CN103873211B CN103873211B (en) | 2017-06-16 |
Family
ID=50911364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210530131.1A Expired - Fee Related CN103873211B (en) | 2012-12-10 | 2012-12-10 | A kind of HARQ is retransmitted and blind checking method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103873211B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110677222A (en) * | 2018-07-03 | 2020-01-10 | 电信科学技术研究院有限公司 | HARQ feedback method and device for PDSCH repeated transmission |
| CN110944310A (en) * | 2019-12-16 | 2020-03-31 | 众邦同力(武汉)技术有限公司 | Based on LoRaTMMulti-channel point-to-point communication apparatus and method of technology |
| CN111342939A (en) * | 2020-03-02 | 2020-06-26 | 惠州Tcl移动通信有限公司 | Data blind retransmission method and device, storage medium and terminal equipment |
| CN111656719A (en) * | 2019-06-14 | 2020-09-11 | 深圳市大疆创新科技有限公司 | Data transmission system, method, transmitting end and computer readable medium |
| CN112204909A (en) * | 2020-08-27 | 2021-01-08 | 北京小米移动软件有限公司 | Blind retransmission method and device, and blind retransmission indication method and device |
| CN113141654A (en) * | 2020-01-19 | 2021-07-20 | 成都鼎桥通信技术有限公司 | Downlink resource scheduling authorization method and system |
| CN113923698A (en) * | 2020-07-10 | 2022-01-11 | 荣耀终端有限公司 | Method, device and chip for processing downlink channel abnormal retransmission |
| CN114008955A (en) * | 2019-06-12 | 2022-02-01 | 联想（新加坡）私人有限公司 | Responding to new data indicators for hybrid automatic repeat request processes |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101330721A (en) * | 2007-06-19 | 2008-12-24 | 中兴通讯股份有限公司 | Data indication method and system |
| CN101990242A (en) * | 2009-07-31 | 2011-03-23 | 夏普株式会社 | Adaptive retransmission method and user equipment in frequency spectrum polymerization system |
| CN102377544A (en) * | 2010-08-10 | 2012-03-14 | 普天信息技术研究院有限公司 | Retransmission method in communication system |
| CN102412943A (en) * | 2010-09-17 | 2012-04-11 | 北京三星通信技术研究有限公司 | Configuration method for mapping table during acknowledgement/negative acknowledgement (ACK/NACK) information transmission based on channel selection |
| WO2012151976A1 (en) * | 2011-05-06 | 2012-11-15 | 中兴通讯股份有限公司 | Method and device for judging error detection |
-
2012
- 2012-12-10 CN CN201210530131.1A patent/CN103873211B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101330721A (en) * | 2007-06-19 | 2008-12-24 | 中兴通讯股份有限公司 | Data indication method and system |
| CN101990242A (en) * | 2009-07-31 | 2011-03-23 | 夏普株式会社 | Adaptive retransmission method and user equipment in frequency spectrum polymerization system |
| CN102377544A (en) * | 2010-08-10 | 2012-03-14 | 普天信息技术研究院有限公司 | Retransmission method in communication system |
| CN102412943A (en) * | 2010-09-17 | 2012-04-11 | 北京三星通信技术研究有限公司 | Configuration method for mapping table during acknowledgement/negative acknowledgement (ACK/NACK) information transmission based on channel selection |
| WO2012151976A1 (en) * | 2011-05-06 | 2012-11-15 | 中兴通讯股份有限公司 | Method and device for judging error detection |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110677222A (en) * | 2018-07-03 | 2020-01-10 | 电信科学技术研究院有限公司 | HARQ feedback method and device for PDSCH repeated transmission |
| CN110677222B (en) * | 2018-07-03 | 2022-04-05 | 大唐移动通信设备有限公司 | HARQ feedback method and device for PDSCH repeated transmission |
| CN114008955A (en) * | 2019-06-12 | 2022-02-01 | 联想（新加坡）私人有限公司 | Responding to new data indicators for hybrid automatic repeat request processes |
| CN111656719A (en) * | 2019-06-14 | 2020-09-11 | 深圳市大疆创新科技有限公司 | Data transmission system, method, transmitting end and computer readable medium |
| CN110944310A (en) * | 2019-12-16 | 2020-03-31 | 众邦同力(武汉)技术有限公司 | Based on LoRaTMMulti-channel point-to-point communication apparatus and method of technology |
| CN113141654A (en) * | 2020-01-19 | 2021-07-20 | 成都鼎桥通信技术有限公司 | Downlink resource scheduling authorization method and system |
| CN111342939A (en) * | 2020-03-02 | 2020-06-26 | 惠州Tcl移动通信有限公司 | Data blind retransmission method and device, storage medium and terminal equipment |
| CN111342939B (en) * | 2020-03-02 | 2022-03-01 | 惠州Tcl移动通信有限公司 | Data blind retransmission method and device, storage medium and terminal equipment |
| CN113923698A (en) * | 2020-07-10 | 2022-01-11 | 荣耀终端有限公司 | Method, device and chip for processing downlink channel abnormal retransmission |
| CN113923698B (en) * | 2020-07-10 | 2022-07-05 | 荣耀终端有限公司 | Method, device and chip for processing downlink channel abnormal retransmission |
| CN112204909A (en) * | 2020-08-27 | 2021-01-08 | 北京小米移动软件有限公司 | Blind retransmission method and device, and blind retransmission indication method and device |
| CN112204909B (en) * | 2020-08-27 | 2023-12-29 | 北京小米移动软件有限公司 | Blind retransmission method and device, and blind retransmission indication method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103873211B (en) | 2017-06-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11012196B2 (en) | Base stations, user equipments and a system for wireless communication, as well as the corresponding methods | |
| EP2826177B1 (en) | Physical uplink shared channel (pusch) transmission time interval (tti) bundling | |
| JP5710795B2 (en) | Bundling of ACK information in a wireless communication system | |
| CN102119503B (en) | Increasing reliability of hybrid automatic repeat request protocol | |
| CN103873211A (en) | HARQ retransmission and blind detection method | |
| KR101702397B1 (en) | Harq-ack handling for unintended downlink sub-frames | |
| EP2984778B1 (en) | Method and device for transmitting uplink data in support of multi-subframe scheduling | |
| CN102142941B (en) | The sending method of response message and system in a kind of tdd systems | |
| US20190379491A1 (en) | Retransmission for punctured signals | |
| CN104363080B (en) | Stop the method and transmitter unit of risk for reducing transmission | |
| KR20170022826A (en) | Method and apparatus for performing hybrid automatic repeat request in a wireless communication system | |
| EP3751914B1 (en) | Communication method, communication apparatus and readable storage medium | |
| CN105580445A (en) | Delayed and bundled retransmissions for low bandwidth applications | |
| US20200137752A1 (en) | Technique for Controlling the Timing of Uplink Control Information in a Radio Communication Between a Network Node and a Radio Device | |
| US20160233990A1 (en) | Data transmission method, apparatus, and device | |
| WO2019029719A1 (en) | Data verification information generation and feedback method, data verification information receiving method and device | |
| CN108521316A (en) | A kind of mixed automatic retransmission request method and device | |
| US20110179332A1 (en) | Method For Automatic Repeat Request Operation, Transceiver Arrangement, And Computer Program | |
| CN102377544A (en) | Retransmission method in communication system | |
| CN110637429A (en) | Puncturing bundling of data of a first service in transmission of a second service | |
| CN101730250B (en) | Method for semi-persistently dispatching resource, base station and user terminal | |
| KR20110048516A (en) | Power control technology | |
| CN102404094B (en) | Processing method and device both for hybrid automatic retransmission requests | |
| CN112544045A (en) | Method and user equipment for controlling data retransmission | |
| WO2013159597A1 (en) | Data transmission method, user equipment, and base station |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170616 Termination date: 20211210 |