CN1497922A - Method for processing reset program when radio link stopped in radio communcation system - Google Patents
Method for processing reset program when radio link stopped in radio communcation system Download PDFInfo
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- CN1497922A CN1497922A CNA2003101028275A CN200310102827A CN1497922A CN 1497922 A CN1497922 A CN 1497922A CN A2003101028275 A CNA2003101028275 A CN A2003101028275A CN 200310102827 A CN200310102827 A CN 200310102827A CN 1497922 A CN1497922 A CN 1497922A
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Abstract
A method for processing the reset program when the radio link control (RLC) is stopped in radio communication system includes such steps as transmitting a reset protocol data unit (PDU) and starting a Timer-RST timer, beginning to run RLC reset program of RLC entity, stopping the RLC entity by upper layer, receiving a RESET ACK PDU relative to the RLC reset program, delaying the reset PDU necessary to transmit because of the Timer-RST timeout until the stop of RLC entity is released, restoring running, transmitting the reset PDU triggered by Timer-RST timeout.
Description
(1) technical field
The present invention relevant a kind of radio link control (radio link control, RLC) method of the processing replacement process that is triggered in the entity (entity); Especially refer to be used for the processing method of the replacement that a kind of RLC entity that stops of radio communication system is triggered.
(2) background technology
The evolution of science and technology and consumer demand are reciprocal influences and advancing.And along with the evolution of science and technology, the epoch-making invention of great significance before the many decades, it is out-of-date now just may to become.Simultaneously, the demand of consumer on market also encouraged many enterprises to make great efforts to develop towards innovation.Now, portable wireless device, for example wireless phone (cellular telephone), personal digital assistant (personal digital assistant), notebook (notebook computer) etc. all are the market that ranges high development.But the employed communications protocol of these wireless devices is very old all.At present, but the consumer is just needing the big and high-speed radio elasticity adjustment of communication data flow accesses quality.Such demand also forces the complicated more communication standard of whole industrial quarters research and development.And the general cooperative programme of the third generation (The 3rd Generation Partnership Project 3GPP) is exactly a kind of new communications protocol.
See also Fig. 1, Fig. 1 is the communication mode calcspar after the prior art simplified.In traditional wireless environment, one first platform (base station for example) 10 can with many second platforms (mobile phone for example) 20, communicate wirelessly.First platform 10 has radio resource control (radio resource control, RRC) control of 12, one radio link (radio link control, RLC) entity 14 and some lower floors (lower layers) 16 under the RLC entity.By service data unit (service data units, SDU) 13, RRC 12 transmissibility communication informations are given RLC entity 14.SDU has the different size of many kinds, and contains the data that RRC 12 wishes to bring second platform 20.RLC entity 14 is deconstructed into one or a plurality of protocol Data Unit (protocol data unit, PDU) 15 with SDU 13.Then, the PDU 15 that produced of each RLC entity 14 will be sent to lower floor 16.Lower floor 16 includes physical layer, and it is responsible for transferring data to second platform 20.
As shown in the figure, second platform 20 has and first platform, 10 identical basic frameworks.Second platform 20 also contains a RRC 22, a RLC entity 24 and lower floor 26.The same with first platform 10, second platform, 20 usefulness RRC 22 transmit SDU 23 and give RLC entity 24, transmit PDU 25 with RLC entity 24 and give lower floor 26.In theory, the data that sent from first platform 10 can be reformed or be recombinated and become one or several PDU 25 after being received by the lower floor 26 of second platform 20, are delivered to RLC entity 24 then.After RLC entity 24 receives PDU 25, PDU is constituted one or several SDU for 25 groups, be delivered to RRC 22 then.Then, RRC 22 converts SDU to communication information, and this communication information should be the same with original communication information in first platform 10.In communication system, the definition of SDU and PDU very extensively.For the purpose of the convenience of following explanation, the SDU that transmits between following " SDU " logical finger RRC and the RLC, and " PDU " logical PDUs that refers to deliver to lower floor by RLC.In addition, unless special indicating, for the convenience on illustrating, the following description all will be write with the position that stands in first platform 10.
In the specification 3GPP of the general cooperative programme of third generation TS 25.322 V3.10.0 " rlc protocol standard (protocol specification) ", the replacement of RLC entity 14 (reset) and stop (stop) detailed definition is all arranged.According to existing affirmation mode (acknowledged mode, AM) and Unacknowledged Mode (unacknowledged mode, UM) RLC in stops (stop) and recovers (continue) functional definition, and when RLC entity 14 stopped, RLC timer (timer) can't be affected.When RLC entity 24 was just receiving a lot of data, RRC 12 or other upper strata may be instructed to stop RLC entity 14, and be overweight with the load that prevents second platform 20.
When RLC entity 14 stopped, the wheel that is triggered seeks function (polling functions) and status data (status) transmission will be delayed, and waited until that directly RLC entity 14 recovers.How this handles not go to illustrate or be defined in the replacement that is triggered when RLC entity 14 stops in the unfortunately present 3GPP standard.
For this problem of clearer understanding, see also Fig. 2.Fig. 2 is a flow chart, shows a known RLC entity that stops.Exist the opportunity that this problem takes place, and resets affirmation PDU (RESET ACK PDU) before when a replacement (RESET) PDU has been sent out by the RLC entity and received one at the RLC entity, when the RLC entity is stopped.Following step shows the correlation step of this problem of generation.
Step 100: the RLC entity 14 of first platform 10 is sent RESET PDU to the second platform 20.
Step 102: when lower floor 16 pointed out this RESET PDU success or unsuccessful transmission, a Timer_RST timer began to start.In the time of Timer_RST timer overtime, another RESET PDU will deliver to second platform 20 by RLC entity 14.
Step 104: differentiate whether RLC entity 14 has been received a corresponding RESET ACK PDU who is sent by second platform 20.If received, carry out step 106; Be not required to stop if receiving this RESET ACK PDU and RLC entity 14, then carry out step 108.
Step 106: because the RLC entity 24 of second platform 20 has determined to have received RESET PDU, the action that RLC entity 14 begins to reset.
Step 108:RLC entity 14 just has been stopped before receiving this RESET ACK PDU.Because RLC entity 14 has stopped, giving lower floor 16 or receive any RLC PDU from lower floor 16 so RLC entity 14 no longer allows to send any RLC PDU.
Step 110:Timer_RST timer overtime.Yet because RLC 14 has stopped, RLC entity 14 can't be sent out RESET PDU.So the Timer_RST timer can't restart timing.
Step 112: by the RRC 12 or the requirement on upper strata, RLC entity 14 is removed and is stopped, and resumes operation.Because the Timer_RST timer is overtime, and can't be restarted timing,, met with the state (deadlock) of deadlock at this point so RLC entity 14 can't be finished a replacement process.
As shown in Figure 2, the reason of deadlock state, exactly because when RLC entity 14 stops, Timer_RST timer overtime, and also RLC entity 14 does not allow that transmitting any RLC PDU gives lower floor or receive any RLC PDU from lower floor.Therefore, after RLC entity 14 recovers, do not have any method RLC entity 14 of resetting, so caused deadlock state.
(3) summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method, handles a replacement action that has been triggered in the RLC entity that radio communication system stops, and prevents above mentioned problem.
According to above-mentioned purpose, the present invention proposes the device of a kind of processing method and corresponding enforcement.When this method is stopped by the upper strata at a RLC entity, if the incident of Timer_RST timer overtime has taken place, then to should the overtime incident the replacement PDU that should be triggered retransmit action and will temporarily not carry out.Wait until that directly this RLC entity is stopped by the upper strata releasing, when resuming operation, just begins to send this replacement PDU.Replacement process just can normal operation like this.
The present invention also proposes the device of another kind of processing method and corresponding enforcement.When this method is stopped by the upper strata at a RLC entity,, then directly make this Timer_RST timer reclocking if the incident of Timer_RST timer overtime has taken place.Like this, stopped by the upper strata releasing, after resuming operation, Timer_RST timer overtime incident can take place just, and then cause the normal operation of replacement process at this RLC entity.
The present invention also proposes the device of another kind of processing method and corresponding enforcement.When this method was stopped by the upper strata at a RLC entity, the RLC entity that still allows to stop to send RESET PDU and receives RESETACK PDU.Like this, even the incident of Timer_RST timer overtime has taken place when the RLC entity is stopped by the upper strata, replacement process also can be finished smoothly.
The invention has the advantages that and to prevent a RLC entity suffers deadlock state.
(4) description of drawings
Fig. 1 is a traditional communication mode simplified block diagram;
Fig. 2 shows the flow chart of the RLC entity that stops of resetting in the prior art; And
Fig. 3, Fig. 4 and Fig. 5 have shown according to three embodiment of the present invention, the flow chart of the RLC entity that stops.
(5) embodiment
For above-mentioned purpose of the present invention, characteristics and advantage can be become apparent, a preferred embodiment cited below particularly, and conjunction with figs. is elaborated as follows:
The present invention is used in the communication mode of similar Fig. 1.In traditional wireless environment, one first platform (base station for example) 10 can with many second platforms (mobile phone for example) 20, communicate wirelessly.First platform 10 has radio resource control (radio resource control, RRC) control of 12, one radio link (radio link control, RLC) entity 14 and some lower floors (lower layers) 16 under the RLC entity.By service data unit (service dataunits, SDU) 13, RRC 12 transmissibility communication informations are given RLC entity 14.SDU has the different size of many kinds, and contains the data that RRC 12 wishes to bring second platform 20.RLC entity 14 is deconstructed into one or a plurality of protocol Data Unit (protocol data unit, PDU) 15 with SDU13.Then, the PDU 15 that produced of each RLC entity 14 will be sent to lower floor 16.Lower floor 16 includes physical layer, and it is responsible for transferring data to second platform 20.
As shown in the figure, second platform 20 has and first platform, 10 identical basic frameworks.Second platform 20 also contains a RRC 22, a RLC entity 24 and lower floor 26.The same with first platform 10, second platform, 20 usefulness RRC 22 transmit SDU 23 and give RLC entity 24, transmit PDU 25 with RLC entity 24 and give lower floor 26.In theory, the data that sent from first platform 10 can be reformed or be recombinated and become one or several PDU 25 after being received by the lower floor 26 of second platform 20, are delivered to RLC entity 24 then.After RLC entity 24 receives PDU 25, PDU is constituted one or several SDU for 25 groups, be delivered to RRC 22 then.Then, RRC 22 converts SDU to communication information, and this communication information should be the same with original communication information in first platform 10.
See also Fig. 3, Fig. 3 shows the first embodiment of the present invention, the flow chart of the RLC entity that stops of resetting.Utilize to postpone to reset action after RLC entity 14 recovers, the first embodiment of the present invention has been prevented the generation of deadlock state.Below be the step introduction:
Step 120: the RLC entity 14 of first platform 10 is sent a RESET PDU and is given second platform 20.
Step 122: when lower floor 16 points out that this RESET PDU transmits (no matter transmits successfully or transmit and get nowhere), a Timer_RST timer begins startup; And in the time of Timer_RST timer overtime, another RESET PDU will deliver to second platform 20 by RLC entity 14.
Step 124: differentiate RLC entity 14 and whether received a corresponding RESET ACK PDU who sends by second platform 20; If received, carry out step 126; Be not required to stop if receiving this RESET ACK PDU and RLC entity 14, then carry out step 128.
Step 126: because the RLC entity 24 of second platform 20 has determined to have received RESET PDU, the action that RLC entity 14 begins to reset.
Step 128:RLC entity 14 just has been stopped before receiving this RESET ACK PDU.Because RLC entity 14 has stopped, giving lower floor 16 or receive any RLC PDU from lower floor 16 so RLC entity 14 no longer allows to send any RLC PDU.
Step 130: differentiate whether overtime of Timer_RST timer.If overtime then carry out step 136; If there is not overtime, then carry out step 132.
Step 132: the response RRC 12 or the requirement on upper strata, RLC entity 14 is removed and is stopped, and resumes operation.
Step 134:Timer_RST timer overtime carry out step 138.
Step 136: because Timer_RST timer overtime has taken place when RLC entity 14 stops, so, because of the essential action that retransmits another RESET PDU of overtime, be delayed to after the step 137.
Step 137: the response RRC 12 or the requirement on upper strata, RLC entity 14 is removed and is stopped, and resumes operation.
Step 138: because RLC entity 14 has been removed and stopped, resuming operation, the RLC entity 14 of first platform 10 is sent another RESET PDU to the second platform 20.
Step 139: when lower floor 16 pointed out that this RESET PDU work that transmits has finished, no matter transmit success or not, the Timer_RST timer restarted to start.Get back to step 124.
Generally speaking, Fig. 3 has described, if when RLC entity 14 stops, the situation of overtime has taken place the Timer_RST timer, and itself thereby the action that must retransmit another RESET PDU will be delayed, and carry out after RLC entity 14 recovers again.That is to say, when RLC entity 14 stops,, also can not send the RESETPDU of a correspondence at once even if the situation of overtime has taken place the Timer_RST timer.The first embodiment of the present invention allows RLC entity 14 after recovering, and just begins to send one because of Timer_RST timer overtime needs the RESET PDU of re-transmission, and thereby restarts the Timer_RST timer.By the method, RLC entity 14 can successfully carry out replacement process, and previous described deadlock state can not take place.
See also Fig. 4, Fig. 4 shows the second embodiment of the present invention, the flow chart of the RLC entity that stops of resetting.When RLC entity 14 stopped, the situation of overtime had taken place in the Timer_RST timer, and the generation that the Timer_RST timer prevents deadlock state is restarted in second embodiment of the present invention utilization.Below be the step introduction:
Step 140: the RLC entity 14 of first platform 10 is sent a RESET PDU and is given second platform 20.
Step 142: when lower floor 16 pointed out that this RESET PDU work that transmits has finished, a Timer_RST timer began to start.
Step 144: differentiate RLC entity 14 and whether received a corresponding RESET ACK PDU who sends by second platform 20.If received, carry out step 146; Be not required to stop if receiving this RESET ACK PDU and RLC entity 14, then carry out step 148.
Step 146: because the RLC entity 24 of second platform 20 has determined to have received RESET PDU, the action that RLC entity 14 begins to reset.
Step 148:RLC entity 14 just has been stopped before receiving this RESET ACK PDU; And because RLC entity 14 has stopped, giving lower floor 16 or receive any RLC PDU from lower floor 16 so RLC entity 14 no longer allows to send any RLC PDU.
Step 150: differentiate whether overtime of Timer_RST timer; If overtime then carry out step 152; If there is not overtime, then carry out step 154.
Step 152: the incident of Timer_RST timer overtime has taken place, when stopping because of RLC entity 14 so the Timer_RST timer restarts.
Step 154: differentiate and whether answer the RRC 12 or the requirement on upper strata, RLC entity 14 is removed and is stopped, and resumes operation, if then carry out step 156; If not, then get back to step 150.
Step 156:Timer_RST timer overtime.
Step 158: this moment, the RLC entity 14 resumed operation, and to should Timer_RST timer overtime, the RLC entity 14 of first platform 10 be sent another RESET PDU to the second platform 20.
Step 159: when lower floor 16 pointed out that this RESET PDU transmits end-of-job, the Timer_RST timer restarted to start, and gets back to step 144 then.
Generally speaking, if Fig. 4 has described RLC entity 14 when stopping, the situation of overtime has taken place in the Timer_RST timer, and then the Timer_RST timer will be restarted.Therefore, determine that the overtime of Timer_RST timer can produce a corresponding RESETPDU after RLC entity 14 is recovering.By the method, RLC entity 14 is reset appositely, and previous described deadlock state can not take place.
See also Fig. 5, Fig. 5 shows the third embodiment of the present invention, the flow chart of the RLC entity that stops of resetting; When RLC entity 14 was stopped by the upper strata, the third embodiment of the present invention allowed RLC entity 14 to receive RESET ACK PDU, also allowed RLC entity 14 to send RESET PDU.Below be the step introduction:
Step 160: the RLC entity 14 of first platform 10 is sent a RESET PDU and is given second platform 20.
Step 162: when lower floor 16 pointed out that this RESET PDU transmits end-of-job, a Timer_RST timer began to start
Step 164: differentiate whether RLC entity 14 has been received a corresponding RESET ACK PDU who is sent by second platform 20; If received, carry out step 166; If do not receive this RESET ACK PDU, and RLC entity 14 is required to stop, and then carry out step 168.
Step 166: because the RLC entity 24 of second platform 20 has determined to have received RESET PDU, the action that RLC entity 14 begins to reset.
Step 168:RLC entity 14 just has been stopped before receiving this RESET ACK PDU.
Step 170: make RLC entity 14 can send RESET PDU and give lower floor 16, and can receive RESET ACK PDU from lower floor 16.
Step 172: differentiate whether overtime of Timer_RST timer; If overtime then carry out step 174; If there is not overtime, then carry out step 178.
Step 174: because RLC entity 14 can have been sent RESET PDU at present, so RLC entity 14 is sent RESET PDU to the second platform 20.
Step 176: when lower floor 16 pointed out that this RESET PDU transmits end-of-job, the Timer_RST timer began to start, and gets back to step 172 then.
Step 178: differentiate RLC entity 14 and whether receive a corresponding RESET ACK PDU who sends from second platform; If then carry out step 180; If not, then get back to step 172.
Step 180: because the RLC entity 24 of second platform 20 has determined to have received RESET PDU, the action that RLC entity 14 begins to reset.
Generally speaking, Fig. 5 has described, and when RLC entity 14 stopped, RLC entity 14 still was allowed to send RESET PDU and receives RESET ACK PDU to lower floor 16 and from lower floor 16; Therefore, RLC entity 14 can use the overtime of Timer_RST to produce new RESET PDU, and, also can receive RESET ACK PDU that second platform comes RLC entity 14 of resetting.Like this, just, can avoid previous described deadlock state.
The invention provides three kinds of embodiment RLC entity that has been stopped of resetting by the upper strata.With prior art in comparison, three methods that method of the present invention provided are: delayed delivery RESET PDU sends to just beginning after the RLC entity that stops to resume operation; When the RLC entity stops, restarting the Timer_RST timer of overtime; And the RLC entity that allows to stop to send RESET PDU and receives RESETACK PDU.Use above three one of any, all can prevent RLC entity suffers deadlock state.
Though the present invention discloses as above with preferred embodiment; yet it is not in order to limit the present invention; any person skilled in the art person without departing from the spirit and scope of the present invention; all equivalence changes or equivalence is replaced when making, so protection scope of the present invention is when looking being as the criterion that accompanying Claim defines.
Claims (4)
1. handling the method for replacement process during a radio link is controlled, is to be used in radio link control (RLC) entity of a radio communication system, and this method includes the following step:
By transmitting a replacement protocol Data Unit (PDU) and starting a timer (Timer_RST), this radio link controlled entity begins a radio link control reset program;
In receive to should the radio link control reset program one reset and confirm that protocol Data Unit (RESET ACK PDU) is preceding, a upper strata stops this radio link controlled entity;
Postpone to resume operation because the transmission of the replacement protocol Data Unit that this timer overtime is triggered is stopped by this upper strata releasing up to this radio link controlled entity; And
Stopped by this upper strata releasing in this radio link controlled entity, after resuming operation, this radio link controlled entity sends this replacement protocol Data Unit that is triggered by this timer overtime.
2. the wireless communication apparatus of a radio link control and treatment replacement process is in radio link control (RLC) entity of a radio communication system, carries out replacement process, and it includes:
One first device by transmitting a replacement protocol Data Unit (PDU) and starting a timer (Timer_RST), makes this radio link controlled entity begin a radio link control reset program;
One second device, in receive to should the radio link control reset program one reset and confirm that protocol Data Unit (RESET ACK PDU) is preceding, make a upper strata stop this radio link controlled entity;
One the 3rd device postpones to resume operation because the transmission of the replacement protocol Data Unit that this timer overtime is triggered is stopped by this upper strata releasing up to this radio link controlled entity; And
One the 4th device is stopped by this upper strata releasing in this radio link controlled entity, after resuming operation, makes this radio link controlled entity send this replacement protocol Data Unit that is triggered by this timer overtime.
3. handling the method for replacement process during a radio link is controlled, is to be used in radio link control (RLC) entity of a radio communication system, and this method includes the following step:
By transmitting a replacement protocol Data Unit (PDU) and starting a timer (Timer_RST), this radio link controlled entity begins a radio link control reset program;
In receive to should the radio link control reset program one reset and confirm that protocol Data Unit (RESET ACK PDU) is preceding, a upper strata stops this radio link controlled entity; And
In this radio link controlled entity stopping period, as this timer overtime, this radio link controlled entity restarts this timer.
4. the wireless communication apparatus of a radio link control and treatment replacement process is in radio link control (RLC) entity of a radio communication system, carries out replacement process, and it includes:
One first device by transmitting a replacement protocol Data Unit (PDU) and starting a timer (Timer_RST), makes this radio link controlled entity begin a radio link control reset program;
One second device, in receive to should the radio link control reset program one reset and confirm that protocol Data Unit (RESET ACK PDU) is preceding, make a upper strata stop this radio link controlled entity; And
One the 3rd device in this RLC entity stopping period, as this timer overtime, then makes this radio link controlled entity restart this timer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101028275A CN1497922A (en) | 2002-10-17 | 2003-10-15 | Method for processing reset program when radio link stopped in radio communcation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/065,435 | 2002-10-17 | ||
| CNA2003101028275A CN1497922A (en) | 2002-10-17 | 2003-10-15 | Method for processing reset program when radio link stopped in radio communcation system |
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| CN1497922A true CN1497922A (en) | 2004-05-19 |
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| CNA2003101028275A Pending CN1497922A (en) | 2002-10-17 | 2003-10-15 | Method for processing reset program when radio link stopped in radio communcation system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009082848A1 (en) * | 2007-12-28 | 2009-07-09 | Zte Corporation | A method for radio link control entity reset |
| CN1937472B (en) * | 2005-09-21 | 2010-06-23 | 创新音速有限公司 | Method and apparatus for reestablishing transmitting sides processing timer in wireless communications systems |
| CN101554008B (en) * | 2006-12-06 | 2013-03-27 | 高通股份有限公司 | Methods and apparatus for RLC re-transmission schemes |
| CN101809948B (en) * | 2007-09-18 | 2016-08-10 | Lg电子株式会社 | The method guaranteeing QoS in multiple structure |
| CN107070607A (en) * | 2008-01-04 | 2017-08-18 | 交互数字专利控股公司 | It is a kind of by the WTRU methods implemented and the WTRU |
| USRE48836E1 (en) | 2008-01-31 | 2021-11-30 | Lg Electronics Inc. | Method for signaling back-off information in random access |
| USRE49739E1 (en) | 2008-01-31 | 2023-11-28 | Lg Electronics Inc. | Method for signaling back-off information in random access |
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2003
- 2003-10-15 CN CNA2003101028275A patent/CN1497922A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1937472B (en) * | 2005-09-21 | 2010-06-23 | 创新音速有限公司 | Method and apparatus for reestablishing transmitting sides processing timer in wireless communications systems |
| CN101554008B (en) * | 2006-12-06 | 2013-03-27 | 高通股份有限公司 | Methods and apparatus for RLC re-transmission schemes |
| CN101809948B (en) * | 2007-09-18 | 2016-08-10 | Lg电子株式会社 | The method guaranteeing QoS in multiple structure |
| US9661524B2 (en) | 2007-09-18 | 2017-05-23 | Lg Electronics Inc. | Method for QoS guarantees in a multilayer structure |
| WO2009082848A1 (en) * | 2007-12-28 | 2009-07-09 | Zte Corporation | A method for radio link control entity reset |
| CN107070607A (en) * | 2008-01-04 | 2017-08-18 | 交互数字专利控股公司 | It is a kind of by the WTRU methods implemented and the WTRU |
| USRE48836E1 (en) | 2008-01-31 | 2021-11-30 | Lg Electronics Inc. | Method for signaling back-off information in random access |
| USRE49739E1 (en) | 2008-01-31 | 2023-11-28 | Lg Electronics Inc. | Method for signaling back-off information in random access |
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