CN103312473B - Reduce the method and apparatus that HARQ merges failure - Google Patents
Reduce the method and apparatus that HARQ merges failure Download PDFInfo
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- CN103312473B CN103312473B CN201210278712.0A CN201210278712A CN103312473B CN 103312473 B CN103312473 B CN 103312473B CN 201210278712 A CN201210278712 A CN 201210278712A CN 103312473 B CN103312473 B CN 103312473B
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Abstract
Present invention is disclosed a kind of method that reduction HARQ merges failure, the method comprising the steps of：Base station sends the first data passed and gives user terminal UE；The redundancy versions of the data are 0；When the response received is that discontinuous transmitting DTX is responded, the data are retransmitted.The present invention also proposes corresponding device.A kind of reduction HARQ that the present invention is provided merges the method and device of failure, is prevented effectively from HARQ caused by passing DCI information missing inspections because of head and merges failure, and does not influence normal HARQ transmission.
Description
Technical field
Merge the method and device of failure the present invention relates to the communications field, more particularly to a kind of reduction HARQ.
Background technology
In LTE（Long Term Evolution, Long Term Evolution）In system, the transmission of downlink data is believed by PDCCH
Road（Physical Downlink Control Channel, Physical Downlink Control Channel）On DCI（Downlink
Control Information, Downlink Control Information）Information notifies UE（User Equipment, user terminal）Need demodulation
Data format, UE is according to the demodulating information provided in DCI information afterwards, in PDSCH（Physical Downlink Shared
Channel, Physical Downlink Shared Channel）Corresponding data are obtained on channel.If the DCI information on PDCCH channels is in UE sides
Lose, then UE can not solve the data on PDSCH channels.
In LTE FDD（Frequency Division Duplexing, full duplex）In, downlink data transmission uses HARQ
（Hybrid Automatic Repeat Request, hybrid automatic repeat-request）Transmission mechanism, the step that UE sides are handled HARQ
It is rapid as follows：
First, if the new data indicator of a transmission block have sent change relative to last time transmission, or this is
First transmission block for receiving, then it is thought that a new transmission, otherwise, is taken as retransmitting.If this is one new
Transmission, then the data in current soft caching are substituted for the data received by UE, if this is a re-transmission, and this number
According to not being successfully decoded also, then UE merges the data received and the data of soft caching, if the data received are with soft caching
In size of data it is inconsistent, then the data in current soft caching are substituted for the data received.Then attempt to decode this
Data in the soft caching of transmission block, successfully decoded, it indicates that physical layer produces acknowledgement character response.
HARQ transmission can use IR（Incremental Redundancy, incremental redundancy）Merge and CC（Chase
Combining, convolutional code）The mode of merging, and during IR merges, RV（Redundancy Version, redundancy versions）There are four kinds,
Respectively 0,2,3,1, different RV version numbers carry different information bits and redundant bit, when the number that RV version numbers are 0
During according to losing, UE will have very maximum probability can not correctly solve data.
So whether the UE versions that all transmission RV is 0 are just best, in fact, it is exactly to retransmit that IR, which merges topmost advantage,
Be different RV edition datas, generally, compared to CC merge all be RV be 0 transmission, using 0,2,3,1 different RV
IR merge its coding gain and be greater than CC merging patterns.
As shown in figure 1, in LTE system, when UE is in far point, due to the increasing of interference, the DCI information of PDCCH channels
It is also possible to be correctly detecting, therefore UE solutions do not go out correct data, the mechanism that base station can be retransmitted according to HARQ is weighed
Pass, but be due to first DCI information, be i.e. RV is 0 DCI information missing inspections, even if RV is all heavy for the data of 2,3,1 version
Pass one time, UE also is difficult to correctly solve this data, and transfer resource is wasted on the contrary.
The content of the invention
The main object of the present invention is prevented effectively from because of head biographies to provide the method and device that a kind of reduction HARQ merges failure
HARQ merges failure caused by DCI information missing inspections, and does not influence normal HARQ transmission.
The present invention proposes that a kind of reduction HARQ merges the method for failure, including step：
Base station sends the first data passed and gives user terminal UE；The redundancy versions of the data are 0；
When the response received is that discontinuous transmitting DTX is responded, the data are retransmitted.
Preferably, it is described when the response received is that DTX is responded in execution, after retransmission data, in addition to:
When sending times reach a preset value, stop retransmitting and discharging HARQ resources.
Preferably, it is described when the response received is that DTX is responded in execution, after retransmission data, in addition to:
When receiving the UE response of decoding failure, it is 2,3,1 that HARQ transmission number of times, which adds 1 and sends redundancy versions successively,
Data merge successfully until HARQ.
Preferably, it is described when the response received is that DTX is responded in execution, after retransmission data, in addition to:
When receiving the UE response of successfully decoded, terminate HARQ transmission.
Preferably, described when the response received is that DTX is responded, retransmission data includes：
New data indicator, resource block, the transport block size of the retransmission data are consistent with the data that head is passed, and otherwise wait for
Dispatch next time.
The present invention also proposes that a kind of reduction HARQ merges the device of failure, including：
First transmission module, the data for sending first biography give user terminal UE；The redundancy versions of the data are 0；
Module is retransmitted, for when the response received is that discontinuous transmitting DTX is responded, retransmitting the data.
Preferably, the repeating transmission module is additionally operable to：
When sending times reach a preset value, stop retransmitting and discharging HARQ resources.
Preferably, the repeating transmission module is additionally operable to：
When receiving the UE response of decoding failure, it is 2,3,1 that HARQ transmission number of times, which adds 1 and sends redundancy versions successively,
Data merge successfully until HARQ.
Preferably, the repeating transmission module is additionally operable to：
When receiving the UE response of successfully decoded, terminate HARQ transmission.
Preferably, it is described repeating transmission module specifically for：
New data indicator, resource block, the transport block size of the retransmission data are consistent with the data that head is passed, and otherwise wait for
Dispatch next time.
A kind of reduction HARQ proposed by the present invention merges the method and device of failure, right during descending HARQ transmission
DTX responses have carried out special processing, and the data re-transmission that RV is 0 is carried out in the case that DTX is responded by being fed back in head biography data,
The possibility that UE missing inspections head passes the DCI message of data is reduced most possibly, so as to receive system information most complete by UE
RV be 0 data, UE sides downlink data HARQ is closed caused by effectively reducing in the case of the first DCI message missing inspections for passing data
And failure, improve the transmission performance of system.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of IR merging in prior art HARQ transmission；
Fig. 2 reduces the schematic flow sheet that HARQ merges an application scenarios in the embodiment of method one failed for the present invention；
Fig. 3 reduces the schematic flow sheet that HARQ merges another application scene in the embodiment of method one failed for the present invention；
Fig. 4 reduces the schematic flow sheet that HARQ merges another application scenarios in the embodiment of method one failed for the present invention；
Fig. 5 reduces the structural representation that HARQ merges the embodiment of device one of failure for the present invention.
The realization, functional characteristics and advantage of the object of the invention will be described further referring to the drawings in conjunction with the embodiments.
Embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
The method and apparatus that the present invention is used, can be effectively prevented from causing because of the first DCI message missing inspection for passing data
HARQ merge failure problem.The data for being 0 for the first RV for passing data, are always to try to that UE can be received, if DCI
Message is examined in UE side leakages, then base station is reissued once or multiple RV is 0 data, and number is passed to ensure that UE can have correctly received head
According to DCI information, pass data decoding unsuccessfully or follow-up re-transmission merges and provides basis even if first.
Because base station can not judge whether UE have received DCI message in itself, even if by PUCCH channels and PUSCH letters
The detection of DTX responses on road, can only also judge that UE may not receive DCI message and cause without any feedback or UE
Decoding downlink data succeeds or failed and feedback information does not reach base station.The first data that pass in the case of above-mentioned kind are mended
Hair, then need to consider the situation that UE receives DCI message, specific as follows：
The first situation, UE does not receive the first DCI message for passing data, and now base station is needed according to side during first biography data
Formula is dispatched, i.e. the new data indicator of retransmission data passes that data are consistent with head, and RV is 0, but resource block, modulation coding mode and
Transport block size can pass inconsistent with head.
Second of situation, UE have received the first DCI message for passing data, but decoding fails, and the sound for the decoding failure fed back
NACK is answered not reach base station, the re-transmission flow under now base station need only actually merge according to normal IR sends 2,3,1 successively
RV data, if base station resends RV once for 0 data, and new data indicator is constant, if then transmitted
Block size is identical, and new data can be put into the data received before soft caching is neutralized and merge by UE, also correspond to once weigh
Pass.
The third situation, UE have received the first DCI message for passing data, and successfully decoded, but the successfully decoded of feedback
Response ACK does not reach base station, and now base station is actually not required to send any re-transmission, if base station have sent new data, but
It is that new data indicator is constant, then UE directly abandons new data.
In summary three kinds of situations, base station side is in the case where data head is transmitted and receives the DTX responses of feedback, such as
Fruit passes that data are consistent with new data indicator with head, and RV is 0, transport block size, resource block, modulation coding mode all consistent sides
Formula is dispatched, then in the case of can ensureing that UE does not receive the first DCI message for passing data, reacquires and arrive with consistent before
DCI information.In the case of UE feedbacks NACK, then the chance for once retransmitting merging is added.In the case of UE feeding back ACKs then only
To waste a bag data, i.e., no matter more than which kind of situation all without having mistake and can effectively reissue the first data passed.
According to above-mentioned analysis, reference picture 2 proposes that the present invention reduces the embodiment of method one that HARQ merges failure, including step
Suddenly：
S10, base station send the first data passed to UE；The RV of the data is 0；
S11, when the response received is that DTX is responded, retransmit the data.
Hereafter by taking the once simple HARQ transmission under different scenes as an example, the implementation of the method for the present embodiment is illustrated
Process：
In one transmission, base station have sent the first DCI information for passing data, and RV is 0.
（1）Feedback as base station have received UE is DTX responses, then base station is weighed according to the first consistent information of data that passes
Pass, i.e. RV, new data indicator, transport block size keep passing data unanimously with head, and the number of transmissions of base station maintenance does not change, such as
Shown in Fig. 2.
（2）As base station have received UE be fed back to DTX response after, according to above（1）Described in base station can by RV be 0
Data are sent out once again, it is possible that the data re-transmitting after UE feedback be still DTX response, base station can continue according to
Aforesaid operations retransmit the data that RV is 0.But this retransmit needs to carry out in certain limit, under some extreme cases if
It is not added with the data temperately repeatedly to feedback DTX responses and carries out the re-transmission that RV is 0, then may wastes too many transfer resource.
So if the number of times of continuous feedback DTX responses has exceeded a default sending times N（N chooses according to the actual situation of system,
Such as N=4）, then it is assumed that HARQ merges failure, discharges HARQ resources, as shown in Figure 3.
（3）No matter in any case, UE has fed back the response NACK of decoding failure, the then normal weight that base station merges according to IR
Flow processing is passed, i.e. HARQ transmission number of times adds 1, no matter whether UE returns DTX responses afterwards, and DTX responses all are treated as into NACK
Treat, and send RV successively and until default sending times N or receive the response ACK of successfully decoded for 2,3,1 data, such as
Shown in Fig. 4.
（4）No matter in any case, if base station receives the response ACK of the successfully decoded of UE feedbacks, then it represents that the data
Bag is sent successfully, as shown in Figure 4.
It should be noted that connecting when being retransmitted receiving the feedback DTX responses of first biography data or after first biography data
It is continuous that new data indicator, transport block size are needed and first biography data are consistent when receiving multiple DTX responses and being retransmitted, and
The resource allocation of base station distribution must same step（1）In it is consistent, therefore system need to preferentially ensure to distribute identical resource, if being
System can not distribute identical resource, then need when dispatching next time.
By above step, UE missing inspection DCI information when head passes data can be effectively prevented from, if missing inspection DCI disappears
Breath, then remedying by base station, can make UE regain first biography data.If DCI information is not missed, equivalent to
Base station has carried out repeating transmission of the RV for 0 first biography data to data, but after UE has fed back NACK, has then illustrated UE
The DCI information of first biography is have received, then base station, which can send the data that RV is 2,3,1, is used for UE HARQ merging.
Compared with prior art, the present embodiment has carried out special processing during descending HARQ transmission to DTX responses, leads to
It is 0 data re-transmission to cross and carry out RV in the case of feedback DTX responses in first biography data, and UE missing inspections head is reduced most possibly and is passed
The possibility of the DCI message of data, so that UE can receive the data that system information most complete RV is 0, is efficiently reduced
UE sides downlink data HARQ merges failure caused by the case of the first DCI message missing inspections for passing data, improves the transmission of system
Performance.
Reference picture 5, proposes that the present invention reduces the embodiment of device one that HARQ merges failure, including：
First transmission module 10, for sending the data of first biography to UE；The RV of the data is 0；
Module 20 is retransmitted, for when the response received is that DTX is responded, retransmitting the data.
The device of the present embodiment can be the base station in HARQ transmission system, or the device being connected with base station.Hereafter with
Exemplified by once simple HARQ transmission under different scenes, the operation principle of the device of the present embodiment is illustrated：
In one transmission, first transmission module 10 have sent the first DCI information for passing data to UE, and RV is 0.
（1）Feedback as base station have received UE is DTX responses, then retransmits module 20 according to the information consistent with first biography data
Retransmitted, i.e. RV, new data indicator, transport block size keep passing data unanimously with head, and the number of transmissions of base station maintenance is not
Change.
（2）As base station have received UE be fed back to DTX response after, according to above（1）Described in retransmit module 20 can be by
RV is sent out once again for 0 data, it is possible that the DTX that is still of UE feedbacks is responded after the data re-transmitting, retransmits module
20 can continue to retransmit the data that RV is 0 according to aforesaid operations.But this retransmit needs to carry out in certain limit, some
If the data being not added with temperately repeatedly to feedback DTX responses carry out the re-transmission that RV is 0 under extreme case, then it may waste too
Many transfer resources.So if the number of times of continuous feedback DTX responses has exceeded a default sending times N（N is real according to system
The situation on border is chosen, such as N=4）, then it is assumed that HARQ merges failure, discharges HARQ resources.
（3）No matter in any case, UE has fed back the response NACK of decoding failure, then retransmits what module 20 merged according to IR
Normal to retransmit flow processing, i.e. HARQ transmission number of times adds 1, and no matter whether UE returns DTX responses afterwards, all works as DTX responses
Treat into NACK, and send RV successively and until default sending times N or receive the response of successfully decoded for 2,3,1 data
ACK。
（4）No matter in any case, if base station receives the response ACK of the successfully decoded of UE feedbacks, then it represents that the data
Bag is sent successfully.
It should be noted that connecting when being retransmitted receiving the feedback DTX responses of first biography data or after first biography data
It is continuous that new data indicator, transport block size are needed and first biography data are consistent when receiving multiple DTX responses and being retransmitted, and
The resource allocation of base station distribution must same step（1）In it is consistent, therefore system need to preferentially ensure to distribute identical resource, if being
System can not distribute identical resource, then need when dispatching next time.
The device of the present embodiment is operated more than, can be effectively prevented from UE missing inspection DCI information when head passes data, such as
Fruit missing inspection DCI message, then remedying by the present apparatus can regain UE and first pass data.If DCI information does not have
It is missed, then it is the 0 first repeating transmission for passing data data to have been carried out with a RV equivalent to the present apparatus, but when UE has fed back NACK
After, then illustrate that UE have received the DCI information of first biography, then the present apparatus, which can send the data that RV is 2,3,1, is used for UE's
HARQ merges.
Compared with prior art, the present embodiment has carried out special processing during descending HARQ transmission to DTX responses, leads to
It is 0 data re-transmission to cross and carry out RV in the case of feedback DTX responses in first biography data, and UE missing inspections head is reduced most possibly and is passed
The possibility of the DCI message of data, so that UE can receive the data that system information most complete RV is 0, is efficiently reduced
UE sides downlink data HARQ merges failure caused by the case of the first DCI message missing inspections for passing data, improves the transmission of system
Performance.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize
Equivalent structure or equivalent flow conversion that description of the invention and accompanying drawing content are made, or directly or indirectly it is used in other correlations
Technical field, be included within the scope of the present invention.
Claims (8)
1. a kind of reduction HARQ merges the method for failure, it is characterised in that including step：
Base station sends the first data passed and gives user terminal UE；The redundancy versions of the data are 0；
When the response received is that discontinuous transmitting DTX is responded, the data are retransmitted, wherein, the new data of the retransmission data
Designator, resource block, transport block size are consistent with the data that head is passed, and otherwise wait for dispatching next time.
2. the method as described in claim 1, it is characterised in that described when the response received is that DTX is responded performing, is retransmitted
After data, in addition to:
When sending times reach a preset value, stop retransmitting and discharging HARQ resources.
3. method as claimed in claim 1 or 2, it is characterised in that described when the response received is that DTX is responded performing,
After retransmission data, in addition to:
When receiving the UE response of decoding failure, HARQ transmission number of times adds 1 and sends the data that redundancy versions are 2,3,1 successively
Until HARQ merges successfully.
4. method as claimed in claim 1 or 2, it is characterised in that described when the response received is that DTX is responded performing,
After retransmission data, in addition to:
When receiving the UE response of successfully decoded, terminate HARQ transmission.
5. a kind of reduction HARQ merges the device of failure, it is characterised in that including：
First transmission module, the data for sending first biography give user terminal UE；The redundancy versions of the data are 0；
Module is retransmitted, for when the response received is that discontinuous transmitting DTX is responded, retransmitting the data, wherein, it is described to retransmit
New data indicator, resource block, the transport block size of data are consistent with the data that head is passed, and otherwise wait for dispatching next time.
6. device as claimed in claim 5, it is characterised in that the repeating transmission module is additionally operable to：
When sending times reach a preset value, stop retransmitting and discharging HARQ resources.
7. the device as described in claim 5 or 6, it is characterised in that the repeating transmission module is additionally operable to：
When receiving the UE response of decoding failure, HARQ transmission number of times adds 1 and sends the data that redundancy versions are 2,3,1 successively
Until HARQ merges successfully.
8. the device as described in claim 5 or 6, it is characterised in that the repeating transmission module is additionally operable to：
When receiving the UE response of successfully decoded, terminate HARQ transmission.
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| CN104640131A (en) * | 2013-11-06 | 2015-05-20 | 北京三星通信技术研究有限公司 | Information processing method and UE |
| CN107465490A (en) * | 2016-06-06 | 2017-12-12 | 大唐移动通信设备有限公司 | A kind of Downlink Control Information DCI0 processing method and system |
| CN108924965B (en) * | 2017-04-24 | 2023-05-23 | 中兴通讯股份有限公司 | Discontinuous transmission detection method, device, base station and terminal |
| CN109039529B (en) * | 2017-06-09 | 2021-01-29 | 华为技术有限公司 | Data transmission method and data transmission device |
| CN109391374B (en) * | 2017-08-03 | 2020-08-28 | 维沃移动通信有限公司 | Data transmission method, data detection method and device |
| CN110418410A (en) | 2018-04-27 | 2019-11-05 | 索尼公司 | User equipment, electronic equipment, wireless communications method and storage medium |
| CN113067681B (en) * | 2020-01-02 | 2023-08-18 | 中国移动通信有限公司研究院 | Hybrid automatic repeat request processing method, communication equipment and medium |
| CN113114432B (en) * | 2021-04-01 | 2022-11-08 | 四川创智联恒科技有限公司 | Scheduling method for PUSCH DTX |
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| CN101645761A (en) * | 2008-08-05 | 2010-02-10 | 中兴通讯股份有限公司 | Method for sending and receiving redundancy version parameters of hybrid automatic retransmission |
| CN101843025A (en) * | 2007-10-29 | 2010-09-22 | Lg电子株式会社 | Method of data transmission using HARQ |
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| CN101645760B (en) * | 2008-08-05 | 2012-11-28 | 中兴通讯股份有限公司 | Method for sending uplink scheduling authorization, device and base station |
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| WO2005032192A1 (en) * | 2003-09-26 | 2005-04-07 | Siemens Aktiengesellschaft | Method for transmitting control data |
| CN101843025A (en) * | 2007-10-29 | 2010-09-22 | Lg电子株式会社 | Method of data transmission using HARQ |
| CN101645761A (en) * | 2008-08-05 | 2010-02-10 | 中兴通讯股份有限公司 | Method for sending and receiving redundancy version parameters of hybrid automatic retransmission |
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