CN101771517A - Method for processing overtime of time adjustment timer and device therefor - Google Patents
Method for processing overtime of time adjustment timer and device therefor Download PDFInfo
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- CN101771517A CN101771517A CN200810224781A CN200810224781A CN101771517A CN 101771517 A CN101771517 A CN 101771517A CN 200810224781 A CN200810224781 A CN 200810224781A CN 200810224781 A CN200810224781 A CN 200810224781A CN 101771517 A CN101771517 A CN 101771517A
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Abstract
The invention discloses a method for processing overtime of a time adjustment timer (TAT) and a device therefor. The method comprises: when a user terminal and an evolution base station (eNB) are in the radio resource control connection state, a media access control (MAC) layer of the user terminal does not receive a time adjustment order of the eNB before the TAT overtimes; after the TAT overtimes, the user terminal is used for publishing data sending status information of a hybrid automatic repeat request (HARQ) course in the buffer memory of an HARQ of the MAC layer to a radio link control (RLC) layer; and after the uplink synchronization is recovered, data retransmission can be carried out on the sending status information published from the MAC. The method and the device can be applied for solving the problem in the prior art that the data retransmission is delayed when the TAT of a UE terminal overtimes.
Description
Technical field
The invention belongs to communication technical field, relate in particular to a kind of processing method and device of time adjustment timer expiry.
Background technology
User terminal (User Equipment, UE) in order can to carry out transmitting uplink data and downlink data correctly to be fed back, must guarantee UE and evolution NodeB (Evolved NodeB, eNB) during sending upstream data up link synchronously.Owing to be subjected to the influence of multipath effect and UE position in the wireless propagation environment, transmission delay when the data that UE sends arrive eNB is along with changing do not stopped paying out in the variation of time, in addition, because the difference of different user environment of living in, also there is difference in transmission delay when the data that each UE sends arrive eNB, guarantee to send the uplink synchronous during the data, that is: the data that send of UE time of arriving eNB need be satisfied the timing requirement that the eNB termination is received.Therefore, need adjust the time that UE sends data.
Third generation partner plans (3rd generation partnership project, 3GPP) Long Term Evolution (longterm evolution, LTE) in the system, eNB and UE safeguard that separately time adjusts timer ((TimeAlignmentTimer, TAT), uplink synchronous is safeguarded by eNB.Wherein, as shown in Figure 1, the concrete steps of timeout treatment comprise:
Step 101, eNB and UE set up Radio Resource control, and (Radio Resource Control RRC) connects foundation, and corresponding information is set.
UE end time adjustment timer is configured by the system broadcast message that eNB sends before setting up the RRC connection.
After the RRC connection foundation, will send specially to UE and order (Time Alignment Command) in the time of need adjusting the UE time of carrying out at the time adjustment of this UE if eNB judges.Adjust order then change step 103 over to if receive time that eNB sends before UE adjusts timer expiry in the time, if do not receive then change step 104 over to.
ENB adjusts command situation to the UE transmitting time following two kinds usually:
1.eNB after the data that receive the UE transmission, judge in the time of to adjust the UE time of carrying out;
2. the time adjustment timer of working as eNB is about to take place overtime.
Step 102, determine whether UE receives the time that eNB sends and adjust order before TAT is overtime,, do not receive and then change step 104 over to if receive then change step 103 over to.
After step 103, UE receive the time adjustment order of eNB transmission, adjust the information of carrying in the order according to the time and hold the transmitting time of upstream data and the data of transmission to handle UE.
UE adjusts the information of carrying in the order according to the time transmitting time of data is adjusted after receiving that time that eNB sends adjusts order (TA Command), and the time of replacement UE end adjust timer (Time Alignment Timer, TAT).If it is overtime that this timing does not occur, UE thinks that this moment and eNB keep uplink synchronous, can carry out transmitting uplink data and the reception condition of downlink data is fed back.
Step 104, UE do not receive the time that eNB sends and adjust order, and TAT is overtime then carries out following operation:
-emptying all mixes and to retransmit (HARQ, Hybrid Automatic Repeat request) buffer memory automatically, thinks that the transmission next time of each process is initial transmission in the HARQ entity;
Physical Uplink Control Channel (Physical Uplink Control CHannel, PUCCH) resource that-release is all;
Detection reference symbol (Sounding Reference Symbols, the SRS) resource of all distribution of-release.
When satisfying the condition of status report, step 105, the rlc layer of setting up back eNB end in uplink synchronous send the status report of rlc layer Data Receiving situation to UE, Radio Link control (RLC, the RadioLink Control) layer of UE end receives the laggard line data of described status report and retransmits.
In sum, overtime when TAT takes place in the prior art, do not provide the data in the HARQ buffer memory to send situation and directly empty the HARQ buffer memory to rlc layer.If the data that exist each HARQ process not to send successfully as yet in the HARQ buffer memory and need to retransmit after uplink synchronous is recovered after the uplink synchronous recovery, just can retransmit after need receiving the status report that eNB holds.Because recovering back eNB in uplink synchronous may be at once to UE feedback RLC status report, need to wait for that UE sends just feeds back after inquiring after (polling) bit.Therefore can produce bigger data transfer delay, also might cause RLC receive window pause (stalling).In addition, rely on receiving terminal to retransmit and also can cause the wasting of resources by rlc layer return state report indication.
Summary of the invention
The embodiment of the invention provides a kind of time to adjust overtime processing method and the device of timer TAT, the data re-transmission delay issue that occurs when being used for solving overtime generation of prior art UE end TAT.
A kind of time of the embodiment of the invention is adjusted the processing method of timer expiry, when user terminal and evolution base station eNB are in Radio Resource control connection state, comprising:
Do not adjust order if receive the time of eNB before user terminal media access control MAC layer is adjusted timer expiry in the time, behind the timer expiry, user terminal MAC layer is mixed the transmission situation information that retransmits HARQ process data in the HARQ buffer memory automatically report Radio Link control rlc layer;
Uplink synchronous is carried out data re-transmission according to the transmission situation information that the MAC layer reports after recovering.
Described transmission situation information comprises the transmission situation information of all HARQ process data in the HARQ buffer memory, and then described rlc layer determines not send successful HARQ process data according to described transmission situation information.
Further, described transmission situation information with HARQ process data in the automatic re-transmission of the user terminal MAC layer mixing HARQ buffer memory reports Radio Link control rlc layer to comprise:
Determine to send successful HARQ process data at the MAC layer, and the transmission situation information that will not send successful HARQ process data reports Radio Link to control rlc layer.
Wherein, the described HARQ process data that transmission is successful is determined according to following mode:
When the transmission block TB of HARQ process correspondence does not receive that the HARQ of eNB transmission successfully receives the ACK affirmation, determine that then the data transmission of this HARQ process does not send successfully.
The embodiment of the invention also provides a kind of time to adjust the timer expiry treatment system, comprises user terminal and evolution base station eNB:
User terminal, be used to monitor and evolution base station eNB between Radio Resource control connection state, the time that does not receive eNB before the media access control MAC layer of self is adjusted timer expiry in the time is adjusted order, behind the timer expiry, the MAC layer is mixed the transmission situation information that retransmits HARQ process data in the HARQ buffer memory automatically report Radio Link control rlc layer, after uplink synchronous is recovered, carry out data re-transmission according to the transmission situation information that the MAC layer reports.
Evolution base station, be used to monitor and eNB between Radio Resource control connection state, and receive the HARQ process data that user terminal sends.
The embodiment of the invention also provides a kind of time to adjust the timer expiry processing unit, comprising:
Reporting module, be used for before the MAC layer of user terminal is adjusted timer expiry in the time, not receiving the time adjustment order of eNB, and timer expiry mixes the transmission situation information that retransmits the HARQ process data of determining in the HARQ buffer memory that does not have success automatically with the MAC layer and reports Radio Link control rlc layer;
Retransmission module is used for after uplink synchronous is recovered, and the transmission situation information of the HARQ process data that does not have success that reports according to reporting module is carried out data re-transmission.
The transmission situation information that described reporting module can also be used for the HARQ process data that the HARQ buffer memory is successful reports rlc layer.
When described reporting module can also be used for HARQ that transmission block TB according to HARQ process correspondence do not receive that eNB sends and successfully receives ACK and confirm, the data of then determining this HARQ process sent and do not send successfully.
Described reporting module can also be used for the retransmission module that reports with the transmission situation information respective logical channels of MAC layer HARQ buffer memory HARQ process data.
The embodiment of the invention is by reporting the transmission situation of data in the HARQ buffer memory to rlc layer in overtime in that TAT takes place, and makes the data that do not send as yet in the HARQ buffer memory can retransmit in time after uplink synchronous is recovered.Avoided current standard taking place to need the data retransmission unnecessary retransmission to postpone in the HARQ buffer memory, the possibility that the RLC receive window that reduces to cause thus pauses under the overtime situation of TAT.
Description of drawings
Fig. 1 is the flow chart that the time is adjusted the processing method of timer expiry in the prior art;
Fig. 2 is a flow chart of a kind of time of the embodiment of the invention adjusting the method for timer expiry processing;
Fig. 3 is an installation drawing of a kind of time of the embodiment of the invention adjusting the timer expiry treatment system;
Fig. 4 is an installation drawing of a kind of time of the embodiment of the invention adjusting the timer expiry processing unit.
Embodiment
The embodiment of the invention provides a kind of time to adjust the processing method of timer expiry, the MAC layer is after TAT is overtime, report the transmission situation of corresponding data to rlc layer, after uplink synchronous was recovered transmission situation that back RLC reports according to the MAC layer that receives, the data that needs are retransmitted retransmitted.Certainly, user terminal MAC layer can be mixed the Radio Link control rlc layer that the transmission situation information that retransmits HARQ process data in the HARQ buffer memory automatically reports respective logical channels.
As shown in Figure 2, the embodiment of the invention provides a kind of time to adjust the processing method of timer expiry, specifically comprises step:
Whether step 202, judgement UE end before time adjustment timer expiry receives described time adjustment order, if UE receives the time adjustment order of eNB transmission then changes step 203 over to before TAT is overtime; If do not receive then change step 204 over to.
ENB adjusts command situation to the UE transmitting time following two kinds usually:
1.eNB when judging that according to the data of UE transmission needs were adjusted the UE time of carrying out, then instruct to the adjustment of UE transmitting time;
2. the time adjustment timer of working as eNB is about to take place overtime.
UE adjusts the information of carrying in the order according to the time transmitting time of data is adjusted after receiving that time that eNB sends adjusts order (TA Command), and the time of replacement UE end adjust timer (Time Alignment Timer, TAT).If it is overtime that this timer does not occur, UE thinks that this moment and eNB keep uplink synchronous, can carry out transmitting uplink data and the reception condition of downlink data is fed back.
The mode that the MAC layer reports can have following several:
1. overtime as TAT, the data in all HARQ processes are sent situation report to rlc layer;
2. it is overtime to work as TAT, the data transmission situation information of determining not transmit in the successful HARQ process is reported rlc layer, wherein, if, (Transport Block TB) does not receive that HARQ that eNB sends successfully receives ACK and confirms that the data of then determining this HARQ process do not send success when the transmission block of each HARQ process correspondence.
According to the different modes that reports, then the HARQ process data transmission situation that reports according to the MAC layer comprises the data organization re-transmission that needs retransmit:
Corresponded manner 1, rlc layer sends the transmission situation of obtaining the HARQ process data that transmission is not successful the situation information from process data.
The process data that corresponded manner 2, rlc layer directly report according to the MAC layer sends situation information organization data re-transmission.
As shown in Figure 3, the embodiment of the invention also provides a kind of time to adjust the timer expiry treatment system, comprises user terminal and evolution base station eNB:
As shown in Figure 4, the embodiment of the invention also provides a kind of time to adjust the timer expiry processing unit, comprises reporting module 401 and retransmission module 402:
The transmission situation information that described reporting module can also be used for the HARQ process data that the HARQ buffer memory is successful reports rlc layer.
When described reporting module can also be used for HARQ that transmission block TB according to HARQ process correspondence do not receive that eNB sends and successfully receives ACK and confirm, the data of then determining this HARQ process sent and do not send successfully.
Described reporting module can also be used for the retransmission module that reports with the transmission situation information respective logical channels of MAC layer HARQ buffer memory HARQ process data.
After MAC layer TAT was overtime, data sent the information of situation in rlc layer reporting MAC layer HAQR buffer memory in embodiments of the present invention, and rlc layer can in time retransmit corresponding data after uplink synchronous is recovered after receiving this information.Avoided in the current standard after TAT is overtime, only empty the HARQ buffer memory, not to the indication of RLC feedback, when having the data that transmission is not successful in the HARQ buffer memory, reduce the unnecessary data retransmission delay, also reduced the possibility that the pause of rlc layer receive window occurs simultaneously.
Method of the present invention is not limited to the embodiment described in the embodiment, and those skilled in the art's technical scheme according to the present invention draws other execution mode, belongs to technological innovation scope of the present invention equally.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (10)
1. the processing method of a time adjustment timer expiry when user terminal and evolution base station eNB are in Radio Resource control connection state, is characterized in that, comprising:
Do not adjust order if receive the time of eNB before the media access control MAC layer of user terminal is adjusted timer expiry in the time, behind described timer expiry, user terminal MAC layer is mixed the transmission situation information that retransmits HARQ process data in the HARQ buffer memory automatically report Radio Link control rlc layer;
Uplink synchronous is carried out data re-transmission according to the transmission situation information that the MAC layer reports after recovering.
2. the method for claim 1 is characterized in that, user terminal MAC layer is mixed the Radio Link control rlc layer that the transmission situation information that retransmits HARQ process data in the HARQ buffer memory automatically reports respective logical channels.
3. the method for claim 1 is characterized in that, described transmission situation information comprises the transmission situation information of all HARQ process data in the HARQ buffer memory, and then described rlc layer determines not send successful HARQ process data according to described transmission situation information.
4. the method for claim 1 is characterized in that, described transmission situation information with HARQ process data in the automatic re-transmission of the user terminal MAC layer mixing HARQ buffer memory reports Radio Link control rlc layer to comprise:
Determine to send successful HARQ process data at the MAC layer, and the transmission situation information that will not send successful HARQ process data reports Radio Link to control rlc layer.
5. as claim 3 or 4 described methods, it is characterized in that the described HARQ process data that transmission is successful is determined according to following mode:
When the transmission block TB of HARQ process correspondence does not receive that the HARQ of eNB transmission successfully receives the ACK affirmation, determine that then the data transmission of this HARQ process does not send successfully.
6. a time is adjusted the timer expiry treatment system, it is characterized in that, comprises user terminal and evolution base station eNB:
User terminal, be used to monitor and evolution base station eNB between Radio Resource control connection state, the time that does not receive eNB before the media access control MAC layer of self is adjusted timer expiry in the time is adjusted order, behind the timer expiry, the MAC layer is mixed the transmission situation information that retransmits HARQ process data in the HARQ buffer memory automatically report Radio Link control rlc layer, after uplink synchronous is recovered, carry out data re-transmission according to the transmission situation information that the MAC layer reports;
Evolution base station, be used to monitor and user terminal between Radio Resource control connection state, and receive the HARQ process data that user terminal sends.
7. a time is adjusted the timer expiry processing unit, it is characterized in that, comprising:
Reporting module, be used for before the MAC layer of user terminal is adjusted timer expiry in the time, not receiving the time adjustment order of eNB, and timer expiry mixes the transmission situation information that retransmits the HARQ process data of determining in the HARQ buffer memory that does not have success automatically with the MAC layer and reports Radio Link control rlc layer;
Retransmission module is used for after uplink synchronous is recovered, and the transmission situation information of the HARQ process data that does not have success that reports according to reporting module is carried out data re-transmission.
8. device as claimed in claim 7 is characterized in that, the transmission situation information that described reporting module also is used for the HARQ process data that the HARQ buffer memory is successful reports rlc layer.
9. device as claimed in claim 7 is characterized in that, when described reporting module also was used for HARQ that transmission block TB according to HARQ process correspondence do not receive that eNB sends and successfully receives ACK and confirm, the data of then determining this HARQ process sent and do not send successfully.
10. device as claimed in claim 7 is characterized in that, described reporting module also is used for the retransmission module that reports with the transmission situation information respective logical channels of MAC layer HARQ buffer memory HARQ process data.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810224781A CN101771517A (en) | 2008-12-29 | 2008-12-29 | Method for processing overtime of time adjustment timer and device therefor |
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| CN200810224781A CN101771517A (en) | 2008-12-29 | 2008-12-29 | Method for processing overtime of time adjustment timer and device therefor |
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| CN101771517A true CN101771517A (en) | 2010-07-07 |
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| CN200810224781A Pending CN101771517A (en) | 2008-12-29 | 2008-12-29 | Method for processing overtime of time adjustment timer and device therefor |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102833055A (en) * | 2011-06-17 | 2012-12-19 | 中兴通讯股份有限公司 | Method and device for testing PUSCH (physical uplink shared channel) demodulation performance |
| WO2014067135A1 (en) * | 2012-11-02 | 2014-05-08 | 华为技术有限公司 | Method and apparatus for controlling transmission of uplink signal |
| CN104836648A (en) * | 2014-02-12 | 2015-08-12 | 普天信息技术研究院有限公司 | Method for fast retransmission and feedback of RLC AM mode |
| WO2018170742A1 (en) * | 2017-03-21 | 2018-09-27 | Oppo广东移动通信有限公司 | Method enabling terminal to maintain uplink synchronization, and terminal |
| CN109246734A (en) * | 2017-06-14 | 2019-01-18 | 维沃移动通信有限公司 | A kind of abnormality eliminating method and terminal |
| CN110830132A (en) * | 2014-11-06 | 2020-02-21 | 华为技术有限公司 | Reference signal measuring method, interference measuring method, power control method and device |
| CN111147198A (en) * | 2020-01-02 | 2020-05-12 | 中科驭数（北京）科技有限公司 | Data retransmission method and device |
| CN112702106A (en) * | 2020-12-14 | 2021-04-23 | 西安电子科技大学 | Autonomous timing method, system, medium, device, terminal and application |
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2008
- 2008-12-29 CN CN200810224781A patent/CN101771517A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102833055A (en) * | 2011-06-17 | 2012-12-19 | 中兴通讯股份有限公司 | Method and device for testing PUSCH (physical uplink shared channel) demodulation performance |
| WO2012171302A1 (en) * | 2011-06-17 | 2012-12-20 | 中兴通讯股份有限公司 | Method and device for testing demodulation performance of pusch channel |
| WO2014067135A1 (en) * | 2012-11-02 | 2014-05-08 | 华为技术有限公司 | Method and apparatus for controlling transmission of uplink signal |
| US9992791B2 (en) | 2012-11-02 | 2018-06-05 | Huawei Technologies Co., Ltd. | Method for controlling uplink signal transmission and apparatus thereof |
| CN104836648A (en) * | 2014-02-12 | 2015-08-12 | 普天信息技术研究院有限公司 | Method for fast retransmission and feedback of RLC AM mode |
| CN104836648B (en) * | 2014-02-12 | 2018-03-23 | 普天信息技术研究院有限公司 | A kind of method of the Fast retransmission of RLC AM patterns and feedback |
| CN110830132A (en) * | 2014-11-06 | 2020-02-21 | 华为技术有限公司 | Reference signal measuring method, interference measuring method, power control method and device |
| CN109716833A (en) * | 2017-03-21 | 2019-05-03 | Oppo广东移动通信有限公司 | A kind of terminal keeps the method and terminal of uplink synchronous |
| WO2018170742A1 (en) * | 2017-03-21 | 2018-09-27 | Oppo广东移动通信有限公司 | Method enabling terminal to maintain uplink synchronization, and terminal |
| CN109716833B (en) * | 2017-03-21 | 2020-03-31 | Oppo广东移动通信有限公司 | Method for keeping uplink synchronization of terminal and terminal |
| US10904881B2 (en) | 2017-03-21 | 2021-01-26 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Method enabling terminal to maintain uplink synchronization, and terminal |
| CN109246734A (en) * | 2017-06-14 | 2019-01-18 | 维沃移动通信有限公司 | A kind of abnormality eliminating method and terminal |
| CN109246734B (en) * | 2017-06-14 | 2020-11-03 | 维沃移动通信有限公司 | Exception handling method and terminal |
| CN111147198A (en) * | 2020-01-02 | 2020-05-12 | 中科驭数（北京）科技有限公司 | Data retransmission method and device |
| CN112702106A (en) * | 2020-12-14 | 2021-04-23 | 西安电子科技大学 | Autonomous timing method, system, medium, device, terminal and application |
| CN112702106B (en) * | 2020-12-14 | 2022-02-08 | 西安电子科技大学 | Autonomous timing method, system, medium, device, terminal and application |
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