CN102377544A - Retransmission method in communication system - Google Patents
Retransmission method in communication system Download PDFInfo
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- CN102377544A CN102377544A CN2010102496836A CN201010249683A CN102377544A CN 102377544 A CN102377544 A CN 102377544A CN 2010102496836 A CN2010102496836 A CN 2010102496836A CN 201010249683 A CN201010249683 A CN 201010249683A CN 102377544 A CN102377544 A CN 102377544A
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Abstract
The invention provides a retransmission method in a communication system. The method comprises the following steps that: after a receiving terminal receives retransmission data sent by a sending terminal, combination processing is carried out on the received data at this time and previous received data; independent decoding is carried out on the received data at this time; if the independent decoding is successful or a receiving result of the combination processing is correct, ACK information is feedbacked to the sending terminal; and if the independent decoding is failed and the receiving result of the combination processing is incorrect, NACK information is feedbacked to the sending terminal. According to the invention, inconsistence of data of receiving and sending terminals during an HARQ process can be avoided; and a diversity gain will not be lost.
Description
Technical field
The present invention relates to the communication technology, the repeating method in particularly a kind of communication system.
Background technology
In mobile communication,, the reliability of communication is had higher requirement along with the continuous expansion of communication service and the raising of service quality.And in GSM, wireless channel is a kind of variable-parameter channel, and its residing environment is also very complicated.For the signal of receiving end, the error code that decline and various interference are caused has random error and burst error, can the major injury communication quality.Therefore, in GSM, must adopt error-control technique to improve signal transfer quality, thus the reliable transmission of guarantee information.The error-control technique that extensively adopts at present is the HARQ technology.
The HARQ technology is ARQ (the Automatic Repeat request) error control method that re-send request may is technological and FEC (Forword Error Correction) forward error correction technology combines automatically.HARQ introduces a FEC subsystem in the ARQ system, the error of transmission that the FEC subsystem is used for correcting normal appearance is promptly corrected a mistake in the error correcting capability scope to reduce number of retransmissions automatically, exceeds the error correction scope and just need retransmit.
HARQ in LTE (the Long Term Evolution) system adopted stop-and-wait protocol (Stop &Wait, SW).In SW mechanism, make a start and after whenever distributing a data grouping, wait for an affirmative acknowledgement (ACK) or negative response (NACK).If receive ACK, make a start and send next new data packet, if receive NACK, resend a grouping.Mistake when preventing that ACK/NACK from receiving determines whether to initiate the transmission of new data through NDI (New Data Indication, the new data indication information) value that comprises among the DCI (Downlink Control Information, Downlink Control Information).Because DCI information has CRC (Cyclic Redundancy Code, cyclic redundancy code) verification, therefore can guarantee that the error probability of NDI is very low.The situation that so just can avoid the ACK/NACK message transmission to make mistakes.
In some private network communication systems, resource-constrained, equipment is simple.Adopt semi-static transmission means in order to save resource, promptly terminal distribution has been given after the up-downgoing resource through DCI in the base station, the new control information of generally not redispatching, and the resource that the terminal will take distribution is always transmitted up to being stopped by notice.The ACK/NACK information of transmission data returns to transmitting terminal by receiving terminal, and transmitting terminal judges that according to ACK/NACK information sending new data still retransmits legacy data again.In this type systematic,, when the transmission new data, can't indicate through the NDI information among the DCI, and can only judge through the ACK/NACK information of receiving terminal feedback as the LTE system owing to adopted semi-static transmission means.ACK/NACK information may be made mistakes when transmission, and promptly receiving terminal has returned 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, receiving terminal is found can lose the data of repetition after the data that receive repeat, so can not have problems.If but receiving terminal has returned nack message to transmitting terminal, transmitting terminal is the NACK flase drop ACK information, and this situation will produce serious problem.At this moment, transmitting terminal sends new data, is data retransmission and merges the data of twice reception that the result will cause can't correctly receiving of data and receiving terminal is thought reception.
Two kinds of more traditional schemes are arranged at present, can address the above problem:
First kind of scheme, the method that adopts in the LTE system is promptly added NDI information in DCI, transmit when sending new data at every turn.Because DCI has CRC check, the NDI error probability is very low, therefore can avoid above-mentioned problem.But in private network system, adopt this method that the efficient of system is reduced.The resource that the PDCCH of private network (Physical Downlink Control Channel) can take is less; Though so only comprise the NDI information of 1 bit among the DCI that PDCCH carries, add the CRC check position after, code check is improved; The receptivity of PDCCH reduces, and system effectiveness also can decrease;
Second kind of scheme, receiving terminal does not remerge data retransmission, and promptly each data retransmission all receives separately.So also can avoid the problems referred to above, the shortcoming of bringing is exactly loss to retransmit the diversity gain that merges.
Summary of the invention
The invention provides the repeating method in a kind of communication system, can avoid the data of the sending and receiving end that the ACK/NACK error of transmission in the HARQ system causes inconsistent, and can not lose diversity gain.
For realizing above-mentioned purpose, the present invention adopts following technical scheme:
Repeating method in a kind of communication system comprises:
After receiving terminal receives the data retransmission of transmitting terminal transmission,, the data of this reception and the data that receive are before merged processing, when the reception result of merging processing is correct, to transmitting terminal feeding back ACK information as if surpassing maximum retransmission; If surpass maximum retransmission or merge the reception result mistake of handling; Then decode the separately data of this reception are when the reception result of independent decoding is correct, to transmitting terminal feeding back ACK information; When the reception result mistake of independent decoding, to transmitting terminal feedback nack message.
Preferably, when the reception result mistake of independent decoding, this method further comprises: the ARQ high-rise by receiving terminal handles the data that mistake receives.
Preferably, said receiving terminal receives the data retransmission that transmitting terminal sends and is: receiving terminal behind transmitting terminal feedback nack message, data retransmission or new data that transmitting terminal sends.
Repeating method in a kind of communication system comprises:
After receiving terminal receives the data retransmission of transmitting terminal transmission,, then the data of this reception and the data that receive are before merged processing, simultaneously the data of this reception are decoded separately if surpass maximum retransmission; When merge handling or the reception result of decoding is correct separately,, handle with the reception result of decoding separately when all wrong, to transmitting terminal feedback nack message when merging to transmitting terminal feeding back ACK information.
Preferably, after receiving terminal receives the data retransmission of transmitting terminal transmission,, then the data of this reception are decoded separately if surpass maximum retransmission.
Preferably, when merging processing and the equal mistake of independent reception result of decoding, this method further comprises: the ARQ by the receiving terminal high level handles the data of mistake reception.
Preferably, said receiving terminal receives the data retransmission that transmitting terminal sends and is: receiving terminal behind transmitting terminal feedback nack message, data retransmission or new data that transmitting terminal sends.
Visible by technique scheme; Among the present invention; Receiving terminal receives data and receives data before and merge processing this after receiving the data retransmission that transmitting terminal sends, and the step of going forward side by side is carried out the independent decoding that this receives data; If decode successfully separately or to merge the reception result of processing correct, then to transmitting terminal feeding back ACK information; If decode separately with merge the equal mistake of reception result of processing, then to transmitting terminal feeding back ACK information.Like this, receiving terminal on the one hand owing to adopt to merge and handle, thereby is correctly resolved nack message and under the situation of data retransmission, can not lost diversity gain at transmitting terminal when the data retransmission that handle to receive; On the other hand owing to adopted the independent decoding of data retransmission; Thereby nack message is resolved to ACK information and send under the situation of new data at transmitting terminal; Still can judge that whether new data receives correct, avoids the inconsistent Data Receiving mistake that causes of sending and receiving end data through independent decoded data.
Description of drawings
Fig. 1 is the schematic flow sheet of repeating method among the present invention.
Embodiment
For making the object of the invention, technological means and advantage clearer, the present invention is explained further details below in conjunction with accompanying drawing.
Basic thought of the present invention is: behind the data retransmission that the receiving terminal receiving end/sending end sends; This is received data merge processing with the data that receive before; And this received data further do independent decoding, to avoid because transmitting terminal is the data retransmission decoding failure that ACK causes with the NACK flase drop.
Next through specific embodiment concrete realization of the present invention is described.
Fig. 1 is the schematic flow sheet of repeating method among the present invention.As shown in Figure 1, this method comprises:
After transmitting terminal receives the ACK/NACK information of feedback, can carry out the transmission of data according to the content of feedback.If ACK, transmitting terminal sends new data; If NACK, and number of retransmissions do not reach maximum retransmission, and then transmitting terminal retransmits initial data; If NACK and number of retransmissions have reached maximum retransmission, then send new data.
Described in background technology, in being configured to the communication system of semi-persistent scheduling, transmitting terminal possibly be ACK with the NACK flase drop, and in this case, transmitting terminal is still handled according to the flow process of ACK, promptly sends new data and gives receiving terminal.
It is identical with existing processing that above-mentioned steps 101～106 is handled, and just repeats no more here.
Here and since before receiving terminal to transmitting terminal feedback be nack message, what therefore no matter this time transmitting terminal sent is data retransmission or new data, is being no more than under the situation of maximum retransmission, receiving terminal is all thought data retransmission.
Merging when handling, can merge the data of new data with reception last time, also can merge with the initial data or the data retransmission that receive for preceding n time, the n maximum is no more than the maximum retransmission of setting.Concrete realization is identical with the data retransmission reception among the existing HARQ, just repeats no more here.
So far, the repeating method flow process in the present embodiment finishes.In the present embodiment, behind the data retransmission that the receiving terminal receiving end/sending end sends, at first merge processing, when merging the reception error in data of handling, further the data of this time reception are carried out individual processing again.
In addition, in the above-described embodiments, for saving time delay; Step 109 and 111 can be carried out simultaneously, promptly is being no more than under the situation of maximum retransmission, and the merging reception of new legacy data and the independent reception of new data are carried out simultaneously; If surpass maximum retransmission, then only carry out the independent reception of new data.In the independent reception of the merging reception of new legacy data or new data; The Data Receiving of any method of reseptance is correct; Then to transmitting terminal feeding back ACK information, when the Data Receiving mistake all appears in the merging reception of new legacy data and the independent reception of new data, then to transmitting terminal feedback nack message.
Through above-mentioned processing, the inconsistent situation of transceive data in the time of can solving the nack message misinformation.If nack message receives correct, then receiving terminal can merge the repeatedly data of transmission, obtains the merging gain of data.If nack message has been received into ACK, then transmitting terminal sends new data, is being no more than under the situation of maximum retransmission, and receiving terminal can adopt dual mode to receive data:
A kind of method is that receiving terminal at first merges new data and legacy data, because the data that merge are different data, so the result can be incorrect, and receiving terminal new data that receive of decoding separately then, and feed back to receiving terminal to the result;
Another kind method is that the independent reception that merges reception and new data is carried out simultaneously, then reception result is judged successively; In like manner, because the data that merge are different data, so the result can be incorrect, if new data is decoded correctly separately so, transmitting terminal can continue to send new data; If the independent decoding error of new data, receiving terminal feedback nack message continues to handle according to said process then.The data that can't correctly receive for receiving terminal are handled by the ARQ of high level, and concrete processing mode is identical with existing mode.
So just can avoid receiving terminal different data to be merged always, and can obtain diversity gain.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope that the present invention protects.
Claims (7)
1. the repeating method in the communication system is characterized in that this method comprises:
After receiving terminal receives the data retransmission of transmitting terminal transmission,, the data of this reception and the data that receive are before merged processing, when the reception result of merging processing is correct, to transmitting terminal feeding back ACK information as if surpassing maximum retransmission; If surpass maximum retransmission or merge the reception result mistake of handling; Then decode the separately data of this reception are when the reception result of independent decoding is correct, to transmitting terminal feeding back ACK information; When the reception result mistake of independent decoding, to transmitting terminal feedback nack message.
2. based on the described method of claim 1, it is characterized in that when the reception result mistake of independent decoding, this method further comprises: the ARQ high-rise by receiving terminal handles the data that mistake receives.
3. method according to claim 1 and 2 is characterized in that, said receiving terminal receives the data retransmission that transmitting terminal sends and is: receiving terminal behind transmitting terminal feedback nack message, data retransmission or new data that transmitting terminal sends.
4. the repeating method in the communication system is characterized in that this method comprises:
After receiving terminal receives the data retransmission of transmitting terminal transmission,, then the data of this reception and the data that receive are before merged processing, simultaneously the data of this reception are decoded separately if surpass maximum retransmission; When merge handling or the reception result of decoding is correct separately,, handle with the reception result of decoding separately when all wrong, to transmitting terminal feedback nack message when merging to transmitting terminal feeding back ACK information.
5. method according to claim 4 is characterized in that, after receiving terminal receives the data retransmission of transmitting terminal transmission, if surpass maximum retransmission, then the data of this reception is decoded separately.
6. based on the described method of claim 4, it is characterized in that when merging processing and the equal mistake of independent reception result of decoding, this method further comprises: the ARQ by the receiving terminal high level handles the data of mistake reception.
7. according to claim 4,5 or 6 described methods, it is characterized in that said receiving terminal receives the data retransmission that transmitting terminal sends and is: receiving terminal behind transmitting terminal feedback nack message, data retransmission or new data that transmitting terminal sends.
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| CN2010102496836A CN102377544A (en) | 2010-08-10 | 2010-08-10 | Retransmission method in communication system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103873211A (en) * | 2012-12-10 | 2014-06-18 | 普天信息技术研究院有限公司 | HARQ retransmission and blind detection method |
| CN107210849A (en) * | 2015-01-23 | 2017-09-26 | Lg电子株式会社 | Method and apparatus of the transmitting/receiving means to the signal of device communication terminal in a wireless communication system |
| WO2017193388A1 (en) * | 2016-05-13 | 2017-11-16 | 华为技术有限公司 | Data transmission method, blind detection method, and terminal device |
| CN111385779A (en) * | 2018-12-29 | 2020-07-07 | 华为终端有限公司 | Data processing method, device and storage medium |
| CN111988117A (en) * | 2019-05-21 | 2020-11-24 | 中兴通讯股份有限公司 | Time slot aggregation processing method and communication equipment |
| CN112583529A (en) * | 2020-12-18 | 2021-03-30 | 脸萌有限公司 | Data processing method, device, equipment and storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1864362A (en) * | 2003-08-14 | 2006-11-15 | 松下电器产业株式会社 | Time monitoring of packet retransmissions during soft handover |
| EP2009832A2 (en) * | 2007-06-29 | 2008-12-31 | Qualcomm Incorporated | Methods and apparatus for H-ARQ process memory management |
| CN101388742A (en) * | 2007-09-14 | 2009-03-18 | 华为技术有限公司 | Data transmission method, system and device in relay system |
| CN101399651A (en) * | 2007-09-28 | 2009-04-01 | 大唐移动通信设备有限公司 | Method, apparatus and system for service data transmission in HSDPA |
-
2010
- 2010-08-10 CN CN2010102496836A patent/CN102377544A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1864362A (en) * | 2003-08-14 | 2006-11-15 | 松下电器产业株式会社 | Time monitoring of packet retransmissions during soft handover |
| EP2009832A2 (en) * | 2007-06-29 | 2008-12-31 | Qualcomm Incorporated | Methods and apparatus for H-ARQ process memory management |
| CN101388742A (en) * | 2007-09-14 | 2009-03-18 | 华为技术有限公司 | Data transmission method, system and device in relay system |
| CN101399651A (en) * | 2007-09-28 | 2009-04-01 | 大唐移动通信设备有限公司 | Method, apparatus and system for service data transmission in HSDPA |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103873211A (en) * | 2012-12-10 | 2014-06-18 | 普天信息技术研究院有限公司 | HARQ retransmission and blind detection method |
| CN103873211B (en) * | 2012-12-10 | 2017-06-16 | 普天信息技术研究院有限公司 | A kind of HARQ is retransmitted and blind checking method |
| CN107210849A (en) * | 2015-01-23 | 2017-09-26 | Lg电子株式会社 | Method and apparatus of the transmitting/receiving means to the signal of device communication terminal in a wireless communication system |
| US11700523B2 (en) | 2015-01-23 | 2023-07-11 | Lg Electronics Inc. | Method and apparatus for transmitting/receiving signal of device-to-device communication terminal in wireless communication system |
| WO2017193388A1 (en) * | 2016-05-13 | 2017-11-16 | 华为技术有限公司 | Data transmission method, blind detection method, and terminal device |
| CN111385779A (en) * | 2018-12-29 | 2020-07-07 | 华为终端有限公司 | Data processing method, device and storage medium |
| CN111988117A (en) * | 2019-05-21 | 2020-11-24 | 中兴通讯股份有限公司 | Time slot aggregation processing method and communication equipment |
| CN111988117B (en) * | 2019-05-21 | 2023-09-12 | 中兴通讯股份有限公司 | Time slot aggregation processing method and communication equipment |
| CN112583529A (en) * | 2020-12-18 | 2021-03-30 | 脸萌有限公司 | Data processing method, device, equipment and storage medium |
| CN112583529B (en) * | 2020-12-18 | 2023-10-31 | 脸萌有限公司 | Data processing method, device, equipment and storage medium |
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Application publication date: 20120314 |