CN104144043B - A kind of method that hybrid automatic repeat-request merges - Google Patents
A kind of method that hybrid automatic repeat-request merges Download PDFInfo
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- CN104144043B CN104144043B CN201310168223.4A CN201310168223A CN104144043B CN 104144043 B CN104144043 B CN 104144043B CN 201310168223 A CN201310168223 A CN 201310168223A CN 104144043 B CN104144043 B CN 104144043B
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Abstract
This application discloses a kind of method that hybrid automatic repeat-request merges, for each business process, merging mark corresponding with the business process is set respectively and merges caching, receiving terminal is received after the PDSCH data of regular traffic, determines which business process is the data belong to according to the PCFICH process numbers indicated；Judge that the business process is corresponding and merge whether mark is 0, if so, the PDSCH data of the regular traffic received to this frame are individually received, the PDSCH data for the regular traffic for otherwise receiving this frame data merged in caching corresponding with the business process merge；If data decoding is correct, by PUCCH feedback ACK, the corresponding mark that merges of the business process is set to 0, merges the business process is corresponding buffer setting full 0 and returns；If data decoding errors, by Physical Uplink Control Channel PUCCH feedback NACK, this frame data is stored in the corresponding merging caching of the business process, and the corresponding mark that merges of the business process is put into 1.
Description
Technical field
The application is related to mobile communication technology field, more particularly to a kind of method that hybrid automatic repeat-request merges.
Background technology
In mobile communications, with the continuous extension and the raising of service quality of communication service, the reliability to communication will
Propose higher requirement.And in mobile communication system, wireless channel is a kind of variable-parameter channel, the environment residing for it is also very multiple
It is miscellaneous.For receiving terminal received signal, the error code caused by decline and various interference has random error and burst error,
Can major injury communication quality.Therefore, in mobile communication system, it is necessary to the transmission of signal is improved using error-control technique
Quality, so as to ensure the transmitting of information.Error-control technique widely used at present is hybrid automatic repeat-request
（HARQ）Technology.
HARQ technologies are HARQs（ARQ）Technology and forward error correction（FEC）The Error Control that technology is combined
Mode.HARQ introduces a FEC subsystem in ARQ systems, and FEC subsystems are used for correcting the error of transmission that often occurs to reduce
Number of retransmissions, i.e., it is automatic in the range of error correcting capability to correct mistake, just need to retransmit beyond error correction scope.
HARQ in LTE system employs stop-and-wait protocol（SW, Stop＆Wait）.In SW mechanism, transmitting terminal is distributed often
An affirmative acknowledgement is waited after one packet（ACK）Or negative response（NACK）.If receiving ACK, under originator is sent
One new data packet, if receiving NACK, resends a packet.During in order to prevent that ACK/NACK from receiving
Mistake, during transmission new data, will send Downlink Control Information（DCI）, a new data configured information is contained in DCI
（NDI）, only NDI be 1 when can just initiate the transmission of new data.Because DCI information has cyclic redundancy check（CRC）Collator
System, therefore can ensure that NDI error probability is very low.The situation that can thus avoid ACK/NACK information transfers from malfunctioning.
In private network communication system, resource-constrained, equipment is simple.Semi-static transmission side is usually used in order to save resource
Formula, i.e. base station after up-downgoing resource, do not retransmit new control information typically, terminal will always by DCI to terminal distribution
The resource for taking distribution is transmitted until being notified stopping.The ACK/NACK information of transmission data returns to transmission by receiving terminal
End, transmitting terminal judges that sending new data still retransmits legacy data further according to ACK/NACK information.
In some private network communication systems, as a result of semi-static transmission means, when transmitting new data without image of Buddha LTE
System equally indicated by the NDI information in DCI, and the ACK/NACK information that can only be fed back by receiving terminal is carried out
Judge.ACK/NACK information may be malfunctioned in transmission, i.e. receiving terminal returns NACK, and transmitting terminal has but been received into ACK, instead
It is as the same.If what receiving terminal was returned is ACK information, and transmitting terminal have received NACK, and at this moment transmitting terminal can retransmit receiving terminal
Correctly received data, receiving terminal repeats to receive identical data.In this case, receiving terminal finds the data weight received
The data of repetition can be lost after multiple, so problem will not be produced.But if receiving terminal returns nack message to transmitting terminal, send
End is ACK information, the problem of such case will produce serious NACK flase drops.At this moment, transmitting terminal sends new data, and receives
It is to retransmit data and to merge the data received twice to hold but think reception, and as a result may result in data can not be correct
Receive.
This problem is solved, more traditional two schemes can be used：
The method used in the first scheme, LTE system, i.e., add NDI information, when sending new data every time in DCI
Transmission is got off.Due to Physical Downlink Control Channel（PDCCH）The problem of having a CRC check, therefore can avoid above-mentioned.But have the disadvantage
In private network system, PDCCH poor-performing.The resource that the PDCCH of private network can take is less, so while transmission is 1
The NDI information of bit, but add behind CRC check position, code check will be improved, PDCCH receptivity reduction, system effectiveness
It can decrease.
Second scheme, receiving terminal is not remerged to retransmitting data, i.e., retransmitting data every time all individually receives.So also may be used
To avoid above mentioned problem, the shortcoming brought is exactly that can lose the diversity gain for retransmitting and merging.
The content of the invention
This application provides a kind of method that hybrid automatic repeat-request merges, new and old data indication signaling branch had not both been needed
Hold, the purpose for improving transmission performance can be reached again.
The embodiment of the present application provides a kind of method that hybrid automatic repeat-request merges, for each business process,
Merging mark corresponding with the business process is set respectively and merges caching, and by initial merging mark and merges buffer setting
For 0, this method includes：
A, receiving terminal are received after the Physical Downlink Shared Channel PDSCH data of regular traffic, according to physical control format
Indicate that the process number that channel PCFICH is indicated determines which business process is the data belong to；
B, judge that the business process is corresponding and merge whether mark is 0, if so, performing step C, otherwise perform step D；
C, the PDSCH data of the regular traffic received to this frame are individually received, and then perform step E；
D, the PDSCH data data merged in caching corresponding with the business process for the regular traffic for receiving this frame are closed
And, then perform step E；
If the decoding of E, data is correct, step F is performed, if data decoding errors, controls to believe by physical uplink
Road PUCCH feedback NACK, this frame data are stored in the corresponding merging caching of the business process, and the corresponding merging of the business process is marked
Will puts 1, jumps to step G；
F, by PUCCH feedback ACK, the corresponding mark that merges of the business process is set to 0, closed the business process is corresponding
And buffer setting full 0, return to step A；
G, judge whether the business process reaches maximum retransmission, if it is not, return to step A, if reached most
It is big to retransmit, then the corresponding mark that merges of the business process is set to 0, the business process is corresponding to merge buffer setting complete zero, returns
Step A.
It is preferred that further comprising before step A：
AA1, receiving terminal judge the PDSCH business information types received, if system information, then normally receive；If
It is PDSCH regular traffic information, then performs the step A.
It is preferred that further comprising before step AA1：
Receiving terminal is received after data, judges whether PDSCH business is interrupted, if PDSCH business is interrupted by other business,
The corresponding merging of the business is then indicated and merged caching zero setting, other business of normal process；Otherwise, the step is performed
AA1。
As can be seen from the above technical solutions, Physical Control Format Indicator Channel is passed through（PCFICH）Indicate process number, pin
To the Physical Downlink Shared Channel of identical services process（PDSCH）Data, decoded result according to last time and maximum retransmission are sentenced
It is disconnected to merge mark, and indicate the Rule of judgment that HARQ merging whether is carried out as the data of identical services process using merging.This Shen
The HARQ retransmission mechanism that please be proposed ensures that the data retransmitted are that the data repeated completely merge detection to carry out HARQ, both need not
New legacy data indication signaling is supported, the purpose for improving transmission performance can be reached again.
Brief description of the drawings
The method flow diagram that Fig. 1 merges for the hybrid automatic repeat-request that the embodiment of the present application is provided；
Fig. 2 be Fig. 1 in step 105 detail flowchart.
Embodiment
To make the technical principle, feature and technique effect of technical scheme clearer, below in conjunction with specific reality
Example is applied technical scheme is described in detail.
In the method that the hybrid automatic repeat-request that the application is provided merges, maximum retransmission known to transmitting-receiving two-end is led to
Cross Physical Control Format Indicator Channel（PCFICH）Process number is indicated, for the Physical Downlink Shared Channel of identical services process
（PDSCH）Data, decoded result according to last time and maximum retransmission judge to merge mark, and assign merging mark as the mutually same trade
Whether the data of business process carry out the Rule of judgment of HARQ merging.It is preferred that when using Chase retransmission mechanism when, need into
Row merge flow in, it is only necessary to by this data and merges cache data be directly overlapped can be used as HARQ merge
Output.In the flow that need not be merged, this data can be used as the output of HARQ merging.
The embodiment of the present application provides the idiographic flow for the method that hybrid automatic repeat-request merges as shown in figure 1, including such as
Lower step：
Step 101：After system starts, it is zero that initialization, which merges mark flag and merges caching,.
Step 102：Receiving terminal is received after data, judges whether PDSCH business is interrupted by other business, if so, performing step
Rapid 103, otherwise perform step 104.
Step 103：Indicate flag zero setting by merging, cache buffer zero setting, other business of normal process are then back to step
Rapid 102.
Step 104：Judge PDSCH business information types：If system information, then normally receive；Jump procedure 102.
If PDSCH regular traffic information, then step 105 is performed.
Step 105：Determine that the data belong to the business of which business process, Mei Geye according to the PCFICH process numbers indicated
Business process is handled according to identical step, return to step 102 after being disposed.
As shown in Fig. 2 by taking business process 1 as an example, step 105 includes following sub-step：
Sub-step 105-1：It is determined that after the data received are the data of business process 1, judging the merging mark of business process 1
Whether will flag1 is zero（Nonjoinder is indicated）；If it is zero to merge mark flag1, sub-step 105-2 is performed, if merging mark
Will flag1 is 1（Merge and indicate）, perform sub-step 105-5；
Sub-step 105-2：The PDSCH data that this frame receives regular traffic are individually received；
Sub-step 105-3：Judge whether data decode correctly, if representing that data can be properly received, then jump to step
105-8；If data decoding is incorrect, sub-step 105-4 is performed；
Sub-step 105-4：By PUCCH feedback NACK, the merging caching buffer1 of this frame data deposit business process 1,
Merge mark flag1 and put 1（Merge and indicate）, represent that this frame data can be merged；Jump to step 105-9；
Sub-step 105-5：This frame data merges with caching buffer1；
Sub-step 105-6：Judge whether the data after merging decode correctly, if so, jumping to step 105-8；If data
Decoding is incorrect, performs sub-step 105-7；
Sub-step 105-7：By PUCCH feedback NACK, this frame data deposit caching buffer1, merge mark flag1 and put
1, represent that this frame data can be merged；Jump to step 105-9.
Step 105-8：PUCCH feedback ACK, merges scale value flag1 and sets to 0, and caching buffer1 sets complete zero, return to step
102。
Step 105-9：Judge whether business process 1 reaches maximum retransmission, if it is not, return to step 102, such as
Fruit reaches maximum re-transmission, performs step 105-10；
Step 105-10：Merge mark flag1 to set to 0, caching buffer1 sets complete zero, return to step 102.
The foregoing is only the preferred embodiment of the application, not to limit the protection domain of the application, it is all
Within the spirit and principle of technical scheme, any modification, equivalent substitution and improvements done etc. should be included in this Shen
Within the scope of please protecting.
Claims (3)
1. a kind of method that hybrid automatic repeat-request merges, it is characterised in that for each business process, set respectively with
The business process is corresponding to be merged mark and merges caching, and is 0, this method by initial merging mark and merging buffer setting
Including：
A, receiving terminal are received after the Physical Downlink Shared Channel PDSCH data of regular traffic, are indicated according to physical control format
The process number that channel PCFICH is indicated determines which business process is the data belong to；
B, judge that the business process is corresponding and merge whether mark is 0, if so, performing step C, otherwise perform step D；
C, the PDSCH data of the regular traffic received to this frame are individually received, and then perform step E；
D, the PDSCH data data merged in caching corresponding with the business process for the regular traffic for receiving this frame merge,
Then step E is performed；
If the decoding of E, data is correct, step F is performed, if data decoding errors, passes through Physical Uplink Control Channel
PUCCH feedback NACK, this frame data are stored in the corresponding merging caching of the business process, and the corresponding merging of the business process is indicated
1 is put, step G is jumped to；
F, by PUCCH feedback ACK, the corresponding mark that merges of the business process is set to 0, merges slow by the business process is corresponding
Deposit setting full 0, return to step A；
G, judge whether the business process reaches maximum retransmission, if it is not, return to step A, if reaching maximum weight
Pass, then set to 0 the corresponding mark that merges of the business process, the business process is corresponding to merge buffer setting complete zero, return to step
A。
2. according to the method described in claim 1, it is characterised in that further comprise before step A：
AA1, receiving terminal judge the PDSCH business information types received, if system information, then normally receive；If
PDSCH regular traffic information, then perform the step A.
3. method according to claim 2, it is characterised in that further comprise before step AA1：
Receiving terminal is received after data, judges whether PDSCH business is interrupted, if PDSCH business is interrupted by other business, will
The business is corresponding to be merged mark and merges caching zero setting, other business of normal process；Otherwise, the step AA1 is performed.
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| KR102695650B1 (en) * | 2016-07-28 | 2024-08-19 | 삼성전자 주식회사 | Method and apparatus for managing hybrid automatic repeat request process in mobile communication system |
| CN111212479A (en) * | 2017-03-17 | 2020-05-29 | 维沃移动通信有限公司 | Resource allocation method and device, authorization-free service processing method and user equipment |
| CN115913470B (en) * | 2021-09-17 | 2024-09-24 | 中信科智联科技有限公司 | Control method and device for hybrid automatic repeat request (HARQ) merging processing |
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| 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 |
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