CN102045883A - Method for poll processing after radio link control reconfiguration in radio communication system - Google Patents
Method for poll processing after radio link control reconfiguration in radio communication system Download PDFInfo
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Abstract
The invention relates to a method for poll processing after radio link control reconfiguration in a radio communication system. In the method, when radio link control reconfiguration occurs, if a new configuration comprises a Timer Poll timer and comprises no Timer Poll Periodic timer, the radio link control is about to check the state of a current sending window, and if a protocol data unit (PDU) which is not confirmed to be received exists in the sending window, a new poll is triggered, otherwise, the poll is unnecessary to trigger; and when the new poll is sent, the Timer Poll timer is about to be started according to the new configuration. The method for poll processing after radio link control reconfiguration in the radio communication system is favorable for effectively preventing two parties from trapping in a stalemate after the radio link control reconfiguration, enhancing system stability and reliability and improving system operating efficiency, and has rapid and simple processes and a wider application scope.
Description
Technical field
The present invention relates to wireless communication field, particularly the Radio Link control and treatment technical field in the WCDMA system is meant that specifically Radio Link is controlled the method for reshuffling the reprocessing poll in a kind of wireless communication system.
Background technology
Radio Link control (RLC, Radio Link Ctrl) the main transmission of being responsible for data in wireless communication protocol, it comprises transparent mode (TM, Transparent Mode), Unacknowledged Mode (UM, Unacknowledged Mode) and three kinds of patterns of affirmation mode (AM, Acknowledged Mode).Then be primarily aimed at the AM pattern among the present invention.
Under the AM pattern, RLC is with service data unit (SDU, Service Data Unit) segmentation, connection, and add packet header, also may add Length Indication (LI, Length Indicator) and byte of padding, be packaged at last and specify the protocol Data Unit (PDU, Protocol Data Unit) of size to send.At transmitting terminal, the PDU that sends must could send in send window for the first time; Receiving terminal is informed its PDU that receives of transmitting terminal by status report, and transmitting terminal comes mobile send window according to the status report that receiving terminal sends, and also can determine simultaneously needs the PDU that retransmits and retransmit.
At transmitting terminal, can active request receiving terminal status report, this process is called poll.The detailed process of poll is, transmitting terminal is changed to 1 to poll bit (Poll Bit) in the packet header of the PDU that will send, send then, receiving terminal is understood the Poll Bit that checks in the pdu header after receiving PDU, if this bit is 1, then represent transmitting terminal request status report, if receiving terminal does not have the illegal state report, then can status report.Transmitting terminal can dispose different modes and trigger poll, specifically comprises:
(1) when a PDU is sent out for the first time, if this PDU is the PDU that last can send, perhaps this PDU that limits according to send window is that last allows to be sent out, and triggers poll this moment;
(2) when a PDU is retransmitted, if this PDU is the PDU that last need retransmit, perhaps this PDU that limits according to send window is that last allows to be retransmitted, and triggers poll this moment;
(3) if Timer_Poll (automatic regular polling) timer expiry then triggers poll;
(4), trigger poll whenever the PDU that has sent specified quantity when (comprising re-transmission);
(5) when having sent the SDU of specified quantity, trigger retransmitting;
(6) account for the ratio of window total length according to sending the PDU that has sent in the window,, then trigger poll if surpassed designated value;
(7) periodic polls timer expiry then triggers poll;
These seven kinds of modes all are configurable, can select different combinations as the case may be during configuration.Timer_Poll timer wherein is to pick up counting after poll sends, and the serial number (SN of last PDU among the PDU that sent at that time of record, Serial Number), if before timer expiry, the PDU that receiving terminal has acknowledged receipt of the SN correspondence of record reaches the whole PDU that sent before it, perhaps receiving terminal is not received at the PDU of the SN correspondence of status report middle finger visible record, stops this timer so.If this timer expiry, the transmission of the next poll that then sets out.
After poll is triggered, if Timer_Status_Prohibit (automatic regular polling is forbidden) timer is not activated, and transmitting terminal also has the PDU that needs transmission or is not identified the PDU that receives in addition, delivery section can or not be identified at the PDU that will send and selecting a PDU among the PDU that receives so, and the Poll Bit in the packet header is changed to 1, send to receiving terminal then.
At receiving terminal, have three kinds of situations may trigger the transmission of status report:
(1) Poll Bit (poll bit) value of receiving the data PDU middle wrapping head is 1;
(2) receiving terminal has detected packet loss;
(3) Timer_Status_Periodic (definition status periodically) timer expiry;
First kind of situation is transmitting terminal active request receiving terminal status report; Second kind is whether the own decision of receiving terminal needs status report with the third situation.After taking place, first kind of situation must trigger the transmission of status report; Second kind and the third situation can dispose, and may exist also and may not exist.
After status report was triggered, receiving terminal also needed to check current Timer_Status_Prohibit (definition status is forbidden) timer that whether exists, and this timer also can dispose.If the Timer_Status_Prohibit timer is configured to effectively, can not be sent out immediately after status report is triggered so, just can be sent out after must waiting until this timer expiry.
If receiving terminal does not have the Timer_Status_Periodic timer, transmitting terminal will dispose periodically a kind of among (Timer_Poll_Periodic) timer and automatic regular polling (Timer_Poll) timer of automatic regular polling at least so, is to enter stalemate for fear of transmitting terminal like this.Suppose that transmitting terminal had not both disposed the Timer_Poll_Periodic timer, do not dispose the Timer_Poll timer yet, trigger poll and just disposed some other modes, and receiving terminal does not dispose the Timer_Status_Periodic timer yet, because the poll triggering mode of transmitting terminal configuration all is disposable, consider the unsteadiness of Radio Link, the PDU that carries polling message might not be received to rectify really and receives, this kind situation is in case take place, and transmitting terminal does not have more PDU to send again, transmitting terminal can not send more wheels again and ask, so receiving terminal can not receive poll always.Because receiving terminal do not receive this PDU, therefore do not receive poll, nor can detect losing of PDU, so will be always can status report, but transmitting terminal can be waited for the status report of receiving terminal always, both sides will be absorbed in stalemate like this.
See also shown in Figure 1, if transmitting terminal has disposed the Timer_Poll timer, after triggering, poll can start the Timer_Poll timer so, even this poll is lost, receiving terminal does not have status report, thereby the Timer_Poll timer can overtimely send new poll like this, and restart the Timer_Poll timer, receive up to transmitting terminal (also may enter other handling procedure when sending after number of times surpasses certain limitation, this situation is not here discussed) till the status report of receiving terminal.See also shown in Figure 2 again, if transmitting terminal has disposed the Timer_Poll_Periodic timer, even so a certain poll sends failure, after the Timer_Poll_Periodic timer is overtime next time, also can trigger the transmission of new poll, thereby can avoid entering stalemate.If at least a among transmitting terminal has disposed Timer_Poll timer and Timer_Poll_Periodic timer just can avoid entering stalemate in summary.
In most of the cases, if transmitting terminal has disposed a kind of among Timer_Poll_Periodic timer and the Timer_Poll timer, just can avoid both sides to enter stalemate.But when reshuffling, situation about still may refuse to budge under specific circumstances.See also shown in Figure 3 again, suppose that receiving terminal has disposed packet loss detection, but do not dispose the Timer_Status_Periodic timer, transmitting terminal has disposed the mode (wherein can use last PDU to send and trigger poll) of Timer_Poll_Periodic timer and some other triggering poll, but does not dispose the Timer_Poll timer.When reshuffling, suppose that transmitting terminal is redeployed as use Timer_Poll timer, but do not use the Timer_Poll_Periodic timer that therefore the Timer_Poll_Periodic timer of configuration can be cut off before.Supposed before reshuffling, packet loss takes place in last PDU that carries poll, because the Timer_Poll_Periodic timer is stopped behind reprovision, and the Timer_Poll timer is not activated, if there is not new PDU to send so, just can not trigger new poll, and receiving terminal is not owing to receive poll, can status report yet, both sides will be absorbed in stalemate like this.
Summary of the invention
The objective of the invention is to have overcome above-mentioned shortcoming of the prior art, provide a kind of can effectively avoid when reshuffling, entering the stability of stalemate, system and reliability is better, operational efficiency is higher, process is quick and easy, the scope of application comparatively widely in the wireless communication system Radio Link control reshuffle the method for reprocessing poll.
In order to realize above-mentioned purpose, to reshuffle the method for reprocessing poll as follows in Radio Link control in the wireless communication system of the present invention:
The method of reprocessing poll is reshuffled in Radio Link control in this wireless communication system, described wireless communication system comprises transmitting terminal and receiving terminal, described Radio Link control is under the affirmation mode, its main feature is, disposed the first poll control timer in the Radio Link control of described transmitting terminal under being in affirmation mode, described method may further comprise the steps:
(1) when described transmitting terminal is reshuffled the Radio Link under affirmation mode control, checks in the control configuration of poll whether be provided with the second poll control timer;
(2) if do not dispose the second poll control timer, then carry out normal reconfiguration course, and finish;
(3), then check whether disposed the first poll control timer simultaneously if disposed the second poll control timer;
(4) if disposed the first poll control timer simultaneously, then carry out normal reconfiguration course, and finish;
(5) if do not dispose the first poll control timer, then check the state of current send window;
(6) if interior all protocol Data Units of send window all are identified have been received, then carry out normal reconfiguration course, and finish;
(7) if the protocol Data Unit that is not acknowledged receipt of by described receiving terminal as yet in addition in the send window then triggers a new poll, carry out normal reconfiguration course then.
To reshuffle the first poll control timer in the method for reprocessing poll be periodically timer of automatic regular polling for Radio Link control in this wireless communication system, and the described second poll control timer is the automatic regular polling timer.
Adopted Radio Link control in the wireless communication system of this invention to reshuffle the method for reprocessing poll, because when generation RLC reshuffles, if comprised the Timer_Poll timer in the new configuration, and do not comprise the Timer_Poll_Periodic timer, RLC can check the state of current send window so, if existence is not identified the PDU that receives in the send window, then trigger new poll; Otherwise do not need to trigger poll; According to new configuration, when sending new poll, can start the Timer_Poll timer, thereby effectively avoided reshuffling the back both sides and be absorbed in stalemate at RLC, can enhanced system stability and reliability, improved the efficient of system's operation, process is quick and easy, and the scope of application is comparatively extensive.
Description of drawings
Fig. 1 is the course of work interaction figure of automatic regular polling timer of the prior art.
Fig. 2 is the periodically course of work interaction figure of timer of automatic regular polling of the prior art.
The mutual schematic diagram of Fig. 3 for being absorbed in stalemate after of the prior art the reshuffling.
Fig. 4 reshuffles the overall flow figure of the method for reprocessing poll for Radio Link control in the wireless communication system of the present invention.
Fig. 5 reshuffles the mutual schematic diagram of the method for reprocessing poll for Radio Link control in the employing wireless communication system of the present invention.
Embodiment
In order more to be expressly understood technology contents of the present invention, describe in detail especially exemplified by following examples.
See also Fig. 4 and shown in Figure 5, the method of reprocessing poll is reshuffled in Radio Link control in this wireless communication system, described wireless communication system comprises transmitting terminal and receiving terminal, described Radio Link control is under the affirmation mode, wherein, disposed the first poll control timer in the Radio Link control of described transmitting terminal under being in affirmation mode, described method may further comprise the steps:
(1) when described transmitting terminal is reshuffled the Radio Link under affirmation mode control, checks in the control configuration of poll whether be provided with the second poll control timer;
(2) if do not dispose the second poll control timer, then carry out normal reconfiguration course, and finish;
(3), then check whether disposed the first poll control timer simultaneously if disposed the second poll control timer;
(4) if disposed the first poll control timer simultaneously, then carry out normal reconfiguration course, and finish;
(5) if do not dispose the first poll control timer, then check the state of current send window;
(6) if interior all protocol Data Units of send window all are identified have been received, then carry out normal reconfiguration course, and finish;
(7) if the protocol Data Unit that is not acknowledged receipt of by described receiving terminal as yet in addition in the send window then triggers a new poll, carry out normal reconfiguration course then.
Wherein, the described first poll control timer is a periodically timer of automatic regular polling, and the described second poll control timer is the automatic regular polling timer.
In the middle of reality is used, under normal circumstances,, see also shown in Figure 2ly earlier if disposed the Timer_Poll_Periodic timer in certain AM RLC configuration, in the time of the Timer_Poll_Periodic timer expiry, can trigger the transmission of poll so.Because the unsteadiness of Radio Link, the PDU that carries polling message might not can be received end and receives.If this thing happens, transmitting terminal will trigger the transmission of poll once more in Timer_Poll_Periodic timer expiry next time, and poll can be sent out once more, like this, can guarantee that receiving terminal can receive poll.Receiving terminal is received poll, just can status report to transmitting terminal, thereby can allow the PDU in the send window of transmitting terminal obtain confirming.
When reshuffling, disposing of AM RLC may change, and under specific circumstances, reshuffles the back transmitting terminal situation of may refusing to budge.Because according to shown in Figure 3, the configuration of AM RLC is the Timer_Poll_Periodic timer before reshuffling, and disposed transmission poll when sending last PDU.In the time of the Timer_Poll_Periodic timer expiry, can trigger new poll.The PDU that carries polling message sends may not be received to rectify and really receives, before the Timer_Poll_Periodic timer is overtime once more, AM RLC is reshuffled, and does not dispose the Timer_Poll_Periodic timer in the new configuration, but has disposed the Timer_Poll timer.Owing to do not dispose the Timer_Poll_Periodic timer in the new configuration, so the Timer_Poll_Periodic timer is stopped.Owing to there is not new poll to be sent out, the Timer_Pol timer can not be activated again.Like this, if there are not new data to need to send, transmitting terminal just can not trigger poll again; Receiving terminal is not owing to receive poll, therefore can status report yet, thus the PDU that is not identified in the send window can not obtain confirming that transmitting terminal has just entered stalemate always.
See also shown in Figure 4ly again, therefore, method provided by the present invention can be good at addressing this problem, when AM RLC reshuffles, check in the poll relevant configuration whether be provided with the Timer_Poll timer,, then undertaken by reshuffling flow process normally if do not dispose the Timer_Poll timer; If disposed the Timer_Poll timer, check then whether new configuration has disposed the Timer_Poll_Periodic timer, if disposed the Timer_Poll_Periodic timer, so still go on by normally reshuffling flow process; If do not dispose the Timer_Poll_Periodic timer, so also need to check the state of current send window, if being identified, received interior all PDU of send window, then enter and normally reshuffle flow process; If be not received the PDU that end acknowledges receipt of in the send window in addition as yet, trigger a new poll so, enter then and normally reshuffle flow process.
Adopt method of the present invention to handle poll after reshuffling, can avoid reshuffling the possibility that the back poll is absorbed in stalemate.Seeing also shown in Figure 5ly again, wherein is a typical case, and in this example, the poll of RLC transmitting terminal is configured to the Timer_Poll_Periodic timer before reshuffling, and has disposed send poll when sending last PDU.Before reshuffling, when last PDU in the transmission buffering area of transmitting terminal sends, send poll, so the Poll Bit of this PDU is changed to 1 owing to disposed last PDU, the expression poll is effective.But for a certain reason, this PDU may not be received to rectify and really receive, so receiving terminal can status report not given transmitting terminal.After this PDU sends, and before the Timer_Poll_Periodic timer expiry, Network reconfiguration RLC, and do not dispose the Timer_Poll_Periodic timer in the new configuration, but disposed the Timer_Poll timer.Because new configuration has comprised the Timer_Poll timer, and do not comprise the Timer_Poll_Periodic timer in the new configuration, and also have the PDU that is not identified as yet in the transmission buffering area, therefore according to method of the present invention, can judge needs to send the PDU that a belt wheel is ask.Owing to disposed the Timer_Poll timer, can start the Timer_Poll timer simultaneously when sending this PDU.If this PDU is not received to rectify really and receives, can trigger new poll the Timer_Poll timer expiry time so is sent out, thereby can guarantee that poll can repeat to send till receiving terminal is replied corresponding status report, therefore can avoid both sides to enter stalemate.
Simultaneously, need to prove, method of the present invention can solve and include but not limited to that the system that produces under the situation that above-mentioned example mentions enters the problem of stalemate, and, therefore can improve the stability of transfer of data and whole system because the present invention can avoid AM RLC transmitting terminal and receiving terminal to enter stalemate.
Adopted the control of Radio Link in the above-mentioned wireless communication system to reshuffle the method for reprocessing poll, because when generation RLC reshuffles, if comprised the Timer_Poll timer in the new configuration, and do not comprise the Timer_Poll_Periodic timer, RLC can check the state of current send window so, if existence is not identified the PDU that receives in the send window, then trigger new poll; Otherwise do not need to trigger poll; According to new configuration, when sending new poll, can start the Timer_Poll timer, thereby effectively avoided reshuffling the back both sides and be absorbed in stalemate at RLC, can enhanced system stability and reliability, improved the efficient of system's operation, process is quick and easy, and the scope of application is comparatively extensive.
In this specification, the present invention is described with reference to its certain embodiments.But, still can make various modifications and conversion obviously and not deviate from the spirit and scope of the present invention.Therefore, specification and accompanying drawing are regarded in an illustrative, rather than a restrictive.
Claims (2)
1. the method for reprocessing poll is reshuffled in Radio Link control in the wireless communication system, described wireless communication system comprises transmitting terminal and receiving terminal, described Radio Link control is under the affirmation mode, it is characterized in that, disposed the first poll control timer in the Radio Link control of described transmitting terminal under being in affirmation mode, described method may further comprise the steps:
(1) when described transmitting terminal is reshuffled the Radio Link under affirmation mode control, checks in the control configuration of poll whether be provided with the second poll control timer;
(2) if do not dispose the second poll control timer, then carry out normal reconfiguration course, and finish;
(3), then check whether disposed the first poll control timer simultaneously if disposed the second poll control timer;
(4) if disposed the first poll control timer simultaneously, then carry out normal reconfiguration course, and finish;
(5) if do not dispose the first poll control timer, then check the state of current send window;
(6) if interior all protocol Data Units of send window all are identified have been received, then carry out normal reconfiguration course, and finish;
(7) if the protocol Data Unit that is not acknowledged receipt of by described receiving terminal as yet in addition in the send window then triggers a new poll, carry out normal reconfiguration course then.
2. the method for reprocessing poll is reshuffled in Radio Link control in the wireless communication system according to claim 1, it is characterized in that, the described first poll control timer is a periodically timer of automatic regular polling, and the described second poll control timer is the automatic regular polling timer.
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| CN 200910197026 CN102045883B (en) | 2009-10-13 | 2009-10-13 | Method for poll processing after radio link control reconfiguration in radio communication system |
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| CN 200910197026 CN102045883B (en) | 2009-10-13 | 2009-10-13 | Method for poll processing after radio link control reconfiguration in radio communication system |
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| WO2013102310A1 (en) * | 2012-01-06 | 2013-07-11 | 华为技术有限公司 | Data processing method and device |
| CN106411478A (en) * | 2015-08-03 | 2017-02-15 | 苏州简约纳电子有限公司 | Method for retransmitting PDU after overtime of RLC polling retransmission timer |
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| CN1476182A (en) * | 2002-08-13 | 2004-02-18 | ���ݵ��Թɷ�����˾ | Method of radio chain circuit control resetting or treatment of timer after reconstitution in radio communication system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013102310A1 (en) * | 2012-01-06 | 2013-07-11 | 华为技术有限公司 | Data processing method and device |
| CN103392374A (en) * | 2012-01-06 | 2013-11-13 | 华为技术有限公司 | Data processing method and device |
| CN103392374B (en) * | 2012-01-06 | 2016-08-10 | 华为技术有限公司 | The method and apparatus that data process |
| CN106411478A (en) * | 2015-08-03 | 2017-02-15 | 苏州简约纳电子有限公司 | Method for retransmitting PDU after overtime of RLC polling retransmission timer |
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