CN101883381A - Radio resource control connection reestablishment method, equipment and system - Google Patents
Radio resource control connection reestablishment method, equipment and system Download PDFInfo
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- CN101883381A CN101883381A CN2009100833688A CN200910083368A CN101883381A CN 101883381 A CN101883381 A CN 101883381A CN 2009100833688 A CN2009100833688 A CN 2009100833688A CN 200910083368 A CN200910083368 A CN 200910083368A CN 101883381 A CN101883381 A CN 101883381A
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Abstract
The invention discloses a radio resource control connection reestablishment method, radio resource control connection reestablishment equipment and a radio resource control connection reestablishment system. The method is applied to a system comprising user equipment ,a service base station and a non-service base station and comprises the following steps that: after detecting a radio link problem, the user equipment sends a measurement report to a service cell of the service base station to ensure that the service cell prepares switching with a non-service cell of the non-service base station according to the measurement report, wherein the measurement report comprises indication information which is used for indicating that the measurement report is triggered by a radio link; and after determining a radio link failure, the user equipment triggers a radio resource control connection reestablishment process, selects a cell and initiates the radio resource control connection reestablishment for the selected cell. The technical scheme of the invention improves the success rate of the radio resource control connection reestablishment and fulfills the aim of reducing the user drop call rate and improving user experience.
Description
Technical field
The present invention relates to the mobile communication technology field, particularly relate to a kind of radio resource control connection reestablishment method, equipment and system.
Background technology
In mobile communications network, for the utilance that improves frequency spectrum resource and the capacity of whole system, the radio-frequency power with the base station is confined in the Serving cell usually.Owing to there is the influence of inevitable barrier and screen in the live network, can cause the signal quality of the Serving cell at subscriber equipment place constantly to worsen in the section sometime, if the signal quality of Serving cell can't take a turn for the better within a certain period of time, will finally cause conversation loss.
At LTE (Long Term Evolution, Long Term Evolution) in the system, in order to reduce the conversation loss that causes owing to a variety of causes, introduced RRC (Radio Resource Control, Radio Resource control) connection reconstruction process, can make subscriber equipment keep being connected by RRC connection reconstruction process, reduce the conversation loss rate with network.At present 3GPP (3rd Generation Partnership Project, third generation partner program) in the agreement, after subscriber equipment detects the Radio Link problem, if this Radio Link problem does not solve at certain hour, then judge RLF (Radio Link Failure, Radio Link Failure) has taken place.After subscriber equipment detects RLF, can attempt initiating RRC connection reconstruction process in order to keep connection.
RRC connection reconstruction process specifically comprises: subscriber equipment carries out cell selecting, preferential E-UTRAN (the Evolved Universal Terrestrial Radio Access Network that selects, the general land wireless network cell of speech), if there is not qualified E-UTRAN sub-district, also can select the sub-district of other wireless systems; Subscriber equipment sends the request of RRC connection reconstruction to the sub-district of selecting; If the contextual information of subscriber equipment is preserved in this sub-district, when promptly this sub-district is a ready sub-district, the RRC connection reconstruction request of subscriber equipment can be accepted in this sub-district, and returns the response of RRC connection reconstruction to subscriber equipment, the RRC connection reconstruction success between subscriber equipment and this sub-district; If the contextual information of subscriber equipment is not preserved in this sub-district, when promptly this sub-district is not a ready sub-district, the RRC connection reconstruction request of this sub-district meeting refusing user's equipment, RRC connection reconstruction failure between subscriber equipment and this sub-district, subscriber equipment enters the RRC_IDLE state, causes the user who accepts to serve that call drop takes place.
The inventor is in realizing process of the present invention, and there are the following problems at least to find prior art:
If when judging generation RLF, subscriber equipment does not send the handover measurement report or sends handover measurement report failure to Serving cell to Serving cell as yet, Serving cell can't carry out handover trigger to other sub-districts, just there is not any ready sub-district at network side, it is the contextual information that subscriber equipment is not all preserved in the outer any sub-district of Serving cell, cause the RRC that can't rebuild between the outer any sub-district of subscriber equipment and Serving cell to be connected, make subscriber equipment in time switch to wireless signal other sub-districts preferably, can't avoid the generation of conversation loss from the Serving cell that wireless signal worsens.
Summary of the invention
The embodiment of the invention provides a kind of radio resource control connection reestablishment method, equipment and system, has improved the success rate of radio resource control connection reestablishment.
The embodiment of the invention proposes a kind of radio resource control connection reestablishment method, is applied to comprise in the system of subscriber equipment, serving BS and non-serving base stations, said method comprising the steps of:
After described subscriber equipment detects the Radio Link problem, Serving cell to described serving BS sends measurement report, make described Serving cell switch preparation according to the non-service cell of described measurement report and described non-serving base stations, comprise indication information in the described measurement report, described indication information is used to indicate described measurement report to be triggered by the Radio Link problem;
Described subscriber equipment triggers the radio resource control connection reestablishment process after judging the generation Radio Link Failure, carries out cell selecting, initiates radio resource control connection reestablishment to the sub-district of selecting.
Preferably, described Serving cell switches preparation according to the non-service cell of described measurement report and non-serving base stations, comprising:
Described Serving cell sends handoff request according to described measurement report to described non-service cell;
Described non-service cell is described user equipment allocation contextual information and reserves Radio Resource;
Described non-service cell returns switching request response to described Serving cell.
Preferably, when described non-service cell is described user equipment allocation contextual information and reservation Radio Resource, also comprise:
Described non-service cell starts the resource reservation timer;
Behind described resource reservation timer expiry, if described non-service cell does not receive the radio resource control connection reestablishment request that sends from described subscriber equipment, described non-service cell discharges the Radio Resource of described subscriber equipment correspondence.
Preferably, described subscriber equipment detects the Radio Link problem, and described subscriber equipment also comprises between the Serving cell transmission measurement report of serving BS:
Described subscriber equipment starts delays timer;
Described delay timer expiry after, normal if radio link quality is not recovered, described subscriber equipment adds the signal strength signal intensity that the measures cell information more than or equal to predetermined threshold value in the described measurement report to.
Preferably, described subscriber equipment starts to be delayed before the timer, also comprises:
Described Serving cell is that described subscriber equipment is provided with the described length of timer of delaying.
Preferably, described Serving cell is that described subscriber equipment is provided with the described length of timer of delaying, and comprising:
Described Serving cell is broadcasted the described length of timer of delaying in the system message of sub-district; Or
Described Serving cell sends the described length of timer of delaying to described subscriber equipment by the down-run survey configuration messages of special use.
Preferably, described subscriber equipment also comprises before adding in the described measurement report more than or equal to the cell information of predetermined threshold value the signal strength signal intensity that measures
Described Serving cell is the described predetermined threshold value of described user device configuration by special-purpose down-run survey configuration messages.
The embodiment of the invention also proposes a kind of subscriber equipment, comprising:
Detection module is used to detect network and the Radio Link problem whether occurs;
Sending module, electrically connect with described detection module, be used for after described detection module detects the Radio Link problem, send measurement report to Serving cell, make described Serving cell switch preparation according to described report and non-service cell, comprise indication information in the described measurement report, described indication information is used to indicate described measurement report to be triggered by the Radio Link problem;
Determination module is used for decision network whether Radio Link Failure takes place;
Rebuilding module electrically connects with described determination module, is used for triggering the radio resource control connection reestablishment process after described determination module judges that Radio Link Failure takes place, and carries out cell selecting, initiates radio resource control connection reestablishment to the sub-district of selecting.
Preferably, described subscriber equipment also comprises:
First time block is used for after described detection module detects the Radio Link problem, starts regularly;
Add module, electrically connect with described first time block, be used at described first time block overtimely, and radio link quality is not recovered just often, the signal strength signal intensity that the measures cell information more than or equal to predetermined threshold value is added in the described measurement report, use for described sending module.
The embodiment of the invention also proposes a kind of base station equipment, comprising:
Receiver module is used to receive the measurement report from subscriber equipment, comprises indication information in the described measurement report, and described indication information is used to indicate described measurement report to be triggered by the Radio Link problem;
Switch preparation module, electrically connect, be used for the described measurement report that receives according to described receiver module, switch preparation with the non-service cell of non-serving base stations with described receiver module.
Preferably, described switching preparation module comprises:
Send submodule, be used for sending handoff request according to described measurement report to described non-service cell, making described non-service cell is described user equipment allocation contextual information and reservation Radio Resource;
Receive submodule, be used to receive switching request response from described non-service cell.
Preferably, described base station equipment also comprises:
Module is set, is used to described subscriber equipment setting to delay length of timer, make described subscriber equipment after detecting the Radio Link problem, start the described timer of delaying;
Configuration module, be used to described user device configuration predetermined threshold value, make described subscriber equipment at the described timer expiry of delaying, and radio link quality do not recover just often, the signal strength signal intensity that the measures cell information more than or equal to described predetermined threshold value is added in the described measurement report.
The embodiment of the invention also proposes a kind of radio resource control connection reestablishment system, comprises subscriber equipment, serving BS and non-serving base stations,
Described subscriber equipment is used for after detecting the Radio Link problem, and the Serving cell transmission measurement report to described serving BS comprises indication information in the described measurement report, and described indication information is used to indicate described measurement report to be triggered by the Radio Link problem; After judging the generation Radio Link Failure, trigger the radio resource control connection reestablishment process, carry out cell selecting, and initiate radio resource control connection reestablishment to the sub-district of selecting;
Described serving BS is used for according to the described measurement report from described subscriber equipment that receives, switches preparation with the non-service cell of described non-serving base stations;
Described non-serving base stations is used for switching preparation with the Serving cell of described serving BS, when the radio resource control connection reestablishment request that receives from described subscriber equipment, carries out radio resource control connection reestablishment with described subscriber equipment.
Preferably, described serving BS, specifically be used for sending handoff request to the non-service cell of described non-serving base stations according to described measurement report, making described non-service cell is described user equipment allocation contextual information and reservation Radio Resource, and receives the switching request response from described non-service cell.
Preferably, described non-serving base stations, also be used for after finishing the switching preparation, start the resource reservation timer, at described resource reservation timer expiry, and when not receiving the radio resource control connection reestablishment request that sends from described subscriber equipment, discharge the Radio Resource of described subscriber equipment correspondence.
Preferably, described subscriber equipment, also be used for after detecting the Radio Link problem, start and delay timer, and at the described timer expiry of delaying, and radio link quality is not recovered just often, and the signal strength signal intensity that the measures cell information more than or equal to predetermined threshold value is added in the described measurement report.
Preferably, described serving BS also is used to described subscriber equipment that the described length of timer of delaying is set, and by the down-run survey configuration messages of special use, is the described predetermined threshold value of described user device configuration.
The technical scheme of the embodiment of the invention has the following advantages, because before Radio Link Failure takes place, network side is finished to switch based on the measurement report from subscriber equipment that receives and is prepared, when subscriber equipment is initiated radio resource control connection reestablishment, network side exists a plurality of finishing to switch the non-service cell of preparing, the success rate that makes subscriber equipment rebuild the Radio Resource control connection is greatly improved, and has reached the purpose that reduces the conversation loss rate and improve user experience.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is a kind of radio resource control connection reestablishment method flow chart in the embodiment of the invention one;
Fig. 2 is a kind of radio resource control connection reestablishment method flow chart in the embodiment of the invention two;
Fig. 3 is the user device architecture schematic diagram in the embodiment of the invention three;
Fig. 4 is the base station equipment structural representation in the embodiment of the invention four;
Fig. 5 is a kind of radio resource control connection reestablishment system configuration schematic diagram in the embodiment of the invention five.
Embodiment
In the embodiment of the invention, after the subscriber equipment primary detection of connected state arrives the Radio Link problem and before the subscriber equipment judgement generation RLF, subscriber equipment sends measurement report to Serving cell; After Serving cell correctly receives this measurement report, only switch preparation, and do not carry out switching with non-service cell, promptly after being ready to complete, switching do not send descending switching command message to subscriber equipment; When Radio Link problem certain time, and after finally RLF taking place, subscriber equipment can select a sub-district to initiate the RRC connection reconstruction, if the sub-district of preparing is switched for finishing in selected sub-district of carrying out the RRC connection reconstruction, then subscriber equipment is rebuild the RRC successful connection, and the user call drop can not take place.
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
As shown in Figure 1, a kind of radio resource control connection reestablishment method flow chart in the embodiment of the invention one may further comprise the steps:
Step 101, after subscriber equipment detects the Radio Link problem, Serving cell to serving BS sends measurement report, make this Serving cell switch preparation according to the non-service cell of this measurement report and non-serving base stations, comprise indication information in this measurement report, this indication information is used to indicate this measurement report to be triggered by the Radio Link problem.
Subscriber equipment sends measurement report to Serving cell after detecting the Radio Link problem and before the judgement generation Radio Link Failure.Owing to also do not satisfy the report condition of handover trigger this moment, subscriber equipment comprises indication information in the measurement report that Serving cell sends, be used to indicate this measurement report to trigger, the measurement report that reports to Serving cell when being different from handover trigger by the Radio Link problem.
Serving cell is provided with a threshold value for the measurement report from subscriber equipment in advance, the signal strength signal intensity that measures certain sub-district when subscriber equipment is during more than or equal to predetermined threshold value, subscriber equipment adds this sub-district corresponding district information in the measurement report to, and this measurement report is sent to Serving cell.
Subscriber equipment is when the Serving cell reporting measurement reports, and the Radio Link problem does not also have serious in degree that can't communication, and Serving cell still can correctly receive measurement report with certain probability.Serving cell is according to the measurement report that receives, and the non-service cell that comprises in this measurement report sends handoff request, and non-service cell is the user equipment allocation contextual information and reserves Radio Resource, and returns switching request response to Serving cell.Serving cell is not carried out switching after finishing the switching preparation, promptly do not send descending switching command to subscriber equipment, avoids owing to do not satisfy the handoff failure that switching condition causes.
Step 102, subscriber equipment trigger the radio resource control connection reestablishment process after judging the generation Radio Link Failure, carry out cell selecting, initiate radio resource control connection reestablishment to the sub-district of selecting.
Radio Link problem certain time when subscriber equipment, the perhaps RLC of subscriber equipment (Radio Link Control, Radio Link control) after layer has reached maximum retransmission and the final RLF of generation when sending measurement report, subscriber equipment can be initiated RRC connection reconstruction process, selecting a sub-district to rebuild RRC connects, if selected sub-district of carrying out the RRC connection reconstruction is a prepared sub-district, promptly this sub-district includes the contextual information of subscriber equipment, then subscriber equipment is rebuild the RRC successful connection, and the user call drop can not take place.
The technical scheme of the embodiment of the invention has the following advantages, because before RLF takes place, network side is finished to switch based on the measurement report from subscriber equipment that receives and is prepared, when subscriber equipment is initiated the RRC connection reconstruction, there are a plurality of prepared sub-districts in network side, the success rate that makes subscriber equipment rebuild the RRC connection is greatly improved, and has reached the purpose that reduces the conversation loss rate and improve user experience.
A kind of radio resource control connection reestablishment method is provided in the above embodiment of the present invention, below, the radio resource control connection reestablishment method among the present invention has been described in detail by the concrete application scenarios of another embodiment combination.Serving cell in following examples and non-service cell lay respectively at serving BS and non-serving base stations.
As shown in Figure 2, a kind of radio resource control connection reestablishment method flow chart in the embodiment of the invention two may further comprise the steps:
After step 201, subscriber equipment detect the Radio Link problem, start watchdog timer T310 and delay timer Td.
Watchdog timer T310 is used for judge taking place RLF, and particularly, subscriber equipment is overtime at watchdog timer T310, and radio link quality do not recover just often, can judge RLF takes place; Delay timer Td and be used to generate the measurement report that is triggered by the Radio Link problem, particularly, subscriber equipment is in that to delay timer Td overtime, and Radio Link do not recover just often, the measurement report that is triggered by the Radio Link problem.
Step 202, delay timer Td overtime after, normal if radio link quality is not recovered, subscriber equipment adds the non-service cell that satisfies condition in the measurement report to.
Because have the wireless signal situation of shake fast in real network, subscriber equipment meets with the Radio Link problem at certain location point, if change the position or the direction of subscriber equipment a little, radio link quality may will be recovered.For fear of causing unnecessary waste of network resources because wireless signal is acutely shaken, subscriber equipment after the Radio Link problem, does not generate measurement report in primary detection at once, delays timer Td but start.Delay timer Td overtime after, normal if radio link quality is not recovered, subscriber equipment adds the non-service cell that satisfies condition in the measurement report to, and reports this measurement report in subsequent step.Delay the duration of the duration of timer Td less than watchdog timer T310, for example, the duration of Td can be 1/4 or 1/3 of the duration of T310.The concrete value of the duration of Td can be determined by emulation or drive test.
Before timer is delayed in the subscriber equipment startup, Serving cell is delayed the duration of timer Td for this subscriber equipment setting, Serving cell is the method that user device configuration is delayed the duration of timer Td, the mode that can broadcast in the system message of sub-district by the duration that will delay timer Td also can send subscriber equipment to by the duration that the down-run survey configuration messages of special use will be delayed timer Td.
Step 203, subscriber equipment sends measurement report to Serving cell.
Serving cell is provided with a threshold value for the measurement report from subscriber equipment in advance, the signal strength signal intensity that measures certain sub-district when subscriber equipment is during more than or equal to predetermined threshold value, subscriber equipment adds this sub-district corresponding district information in the measurement report to, and this measurement report is sent to Serving cell.Above-mentioned predetermined threshold value is lower than the handover event activation threshold value, and concrete value can obtain by emulation or route.Before subscriber equipment added in the measurement report more than or equal to the cell information of predetermined threshold value the signal strength signal intensity that measures, Serving cell can be the above-mentioned predetermined threshold value of user device configuration by special-purpose down-run survey configuration messages.
Subscriber equipment also comprises indication information to the measurement report that Serving cell sends, and this indication information is used to indicate this measurement report to be triggered by the Radio Link problem, the handover measurement report that reports to Serving cell when being different from handover trigger.
Step 204, the Serving cell non-service cell in measurement report sends handoff request.
Serving cell receives the measurement report from subscriber equipment, determines that this measurement report is that the non-service cell in this measurement report sends handoff request after being triggered by the Radio Link problem, and the request non-service cell switches preparation.
Step 205, non-service cell are the user equipment allocation contextual information and reserve Radio Resource, and start resource reservation timer Tres.
After non-service cell is finished and switched preparation, start resource reservation timer Tres, this resource reservation length of timer is greater than the duration and the duration sum of delaying timer Td of watchdog timer T310.
Step 206, non-service cell returns switching request response to Serving cell.
Non-service cell returns switching request response to Serving cell after finishing and switching preparation, after Serving cell receives this switching request response, does not send switching command to subscriber equipment, avoids owing to do not satisfy the handoff failure that switching condition causes.
Step 207, normal if radio link quality is not recovered after watchdog timer T310 is overtime, subscriber equipment is judged generation RLF.
Subscriber equipment triggers the radio resource control connection reestablishment process after judging the generation Radio Link Failure.
Step 208, subscriber equipment carries out cell selecting, chooses non-service cell 2 to carry out the RRC connection reconstruction.
In present 3GPP agreement Release8 version, subscriber equipment detects the Radio Link problem and judges the time interval of taking place between the RLF, the maximum that is the duration of watchdog timer T310 is 2 seconds, in the above-mentioned time interval, the position change of subscriber equipment is about tens meters to twenties meters (being between 50km/h and 100km/h corresponding to moving user equipment), and promptly the change in location of subscriber equipment is not very big.Therefore, the RRC connection reconstruction sub-district of subscriber equipment selection is likely the non-service cell that comprises before the subscriber equipment in the measurement report that Serving cell reports.
Step 209, subscriber equipment sends the request of RRC connection reconstruction to non-service cell 2.
Step 210, non-service cell 2 returns the response of RRC connection reconstruction to subscriber equipment.
Step 211, subscriber equipment and non-service cell 2 are finished the RRC connection reconstruction.
Because the non-service cell 2 that subscriber equipment is selected had been finished to switch and prepared, and promptly comprised the contextual information of subscriber equipment in this subscriber equipment, and be subscriber equipment reservation Radio Resource before receiving the request of RRC connection reconstruction.Therefore, subscriber equipment and non-service cell 2 can successfully be realized the RRC connection reconstruction.
Step 212, after resource reservation timer Tres was overtime, owing to the RRC connection reconstruction request that does not receive from subscriber equipment, non-service cell 1 was released to the subscriber equipment reserved resource.
After non-service cell is finished and switched preparation, in the duration of resource reservation timer Tres, connect if subscriber equipment is not rebuild RRC at this non-service cell, it is the subscriber equipment reserved resource that this non-service cell discharges before.
Need to prove that the inventive method can be adjusted each sequence of steps according to actual needs.
The technical scheme of the embodiment of the invention has the following advantages, because non-service cell was finished to switch before RLF takes place and is prepared, for user equipment allocation contextual information and Radio Resource, therefore, non-service cell is after the RRC connection reconstruction request that receives from subscriber equipment, can successfully rebuild RRC with subscriber equipment and be connected, reduce user's cutting off rate, improve user's experience.
A kind of radio resource control connection reestablishment method and application scenarios are provided in the above embodiment of the present invention, and correspondingly, the present invention also provides the subscriber equipment of using said method by following examples.
As shown in Figure 3, the user device architecture schematic diagram in the embodiment of the invention three comprises:
When detection module 310 detected network and the Radio Link problem occurs, network communication was not interrupted, and the subscriber equipment of this moment still is in connection status, does not satisfy the condition of handover trigger.
Above-mentioned detection module 310 is to be responsible in the above subscriber equipment detecting the part whether network the Radio Link problem occurs, can be software, hardware or both combinations.
Sending module 320, electrically connect with detection module 310, be used for after detection module 310 detects the Radio Link problem, be responsible for sending measurement report to Serving cell, comprise indication information in this measurement report, this indication information is used to indicate this measurement report to be triggered by the Radio Link problem.
Above-mentioned sending module 320 is parts of being responsible for sending to Serving cell measurement report in the above subscriber equipment, can be software, hardware or both combinations.
When Radio Link problem certain time, perhaps sending module 320 when sending measurement report and reached maximum retransmission, determination module 330 decision network generation Radio Link Failure.
Above-mentioned determination module 330 is to be responsible for the part whether decision network Radio Link Failure takes place in the above subscriber equipment, can be software, hardware or both combinations.
Rebuilding module 340 electrically connects with determination module 330, is used for triggering the radio resource control connection reestablishment process after determination module 330 judges that Radio Link Failure takes place, and carries out cell selecting, initiates radio resource control connection reestablishment to the sub-district of selecting.
Above-mentioned rebuilding module 340 is to be responsible for selecting non-service cell in the above subscriber equipment, initiates the part of radio resource control connection reestablishment to this non-service cell, can be software, hardware or both combinations.
Above-mentioned subscriber equipment also comprises:
For fear of because the violent shake of wireless signal causes unnecessary waste of network resources, after the Radio Link problem, do not generate measurement report at once, but start first time block 350 in detection module 310 primary detection.
Above-mentioned first time block 350 is to be responsible in the above subscriber equipment after detecting the Radio Link problem, starts part regularly, can be software, hardware or both combinations.
Add module 360, electrically connect with first time block 350, be used at first time block 350 overtimely, and radio link quality is not recovered just often, the signal strength signal intensity that the measures cell information more than or equal to predetermined threshold value is added in the measurement report, use for sending module 320.
Above-mentioned interpolation module 360 is to be responsible for the signal strength signal intensity that will measure in the above subscriber equipment to add part in the measurement report to more than or equal to the cell information of predetermined threshold value, can be software, hardware or both combinations.
Above-mentioned subscriber equipment also comprises:
Second time block 370 starts after the Radio Link problem in detection module 310 primary detection, and the duration of second time block 370 is values that Serving cell passes through the T310 parameter of system broadcast message or the setting of special measurement configuration messages.
Above-mentioned second time block 370 is to be responsible in the above subscriber equipment after detecting the Radio Link problem, starts part regularly, can be software, hardware or both combinations.
Correspondingly, determination module 330 specifically is used at second time block 370 overtimely, and radio link quality is not recovered just often decision network generation Radio Link Failure.
The technical scheme of the embodiment of the invention has the following advantages, owing to before initiating radio resource control connection reestablishment, send measurement report to network side, make network side switch preparation, therefore, can farthest improve the success rate of radio resource control connection reestablishment, reduce user's cutting off rate, improved user's experience.
A kind of subscriber equipment that is applied to radio resource control connection reestablishment is provided in the above embodiment of the present invention, and correspondingly, the present invention also provides the base station equipment that is applied to radio resource control connection reestablishment by following examples.
As shown in Figure 4, be the base station equipment structural representation in the embodiment of the invention four, this base station equipment 400 comprises:
Receiver module 410 is used to receive the measurement report from subscriber equipment, comprises indication information in this measurement report, and this indication information is used to indicate this measurement report to be triggered by the Radio Link problem.
Subscriber equipment sends measurement report after detecting the Radio Link problem after, because network communication this moment is not interrupted, receiver module 410 can correctly receive measurement report with certain probability.
Above-mentioned receiver module 410 is parts of being responsible in the above base station equipment 400 receiving from the measurement report of subscriber equipment, can be software, hardware or both combinations.
Switch preparation module 420, electrically connect, be used for the measurement report that receives according to receiver module, switch preparation with the non-service cell of non-serving base stations with receiver module 410.
Particularly, switch preparation module 420 and send handoff request according to measurement report to non-service cell, to make this non-service cell be the user equipment allocation contextual information and reserve Radio Resource, and non-service cell is finished to switch and returned switching request response after preparing.
Above-mentioned switching preparation module 420 is to be responsible in the above base station equipment 400 switching the part of preparation with non-service cell, can be software, hardware or both combinations.
Above-mentioned base station equipment 400 also comprises:
Module 430 is set, is used to the subscriber equipment setting to delay length of timer, make this subscriber equipment after detecting the Radio Link problem, start and delay timer.
Module 430 is set can be broadcasted in the system message of sub-district by delaying length of timer, also can will delay length of timer by the down-run survey configuration messages of special use and send subscriber equipment to.
The above-mentioned module 430 that is provided with is to be responsible for the part that length of timer is delayed in the subscriber equipment setting in the above base station equipment 400, can be software, hardware or both combinations.
Configuration module 440, be used to the user device configuration predetermined threshold value, make this subscriber equipment delay timer expiry, and radio link quality do not recover just often, the signal strength signal intensity that the measures cell information more than or equal to predetermined threshold value is added in the measurement report.
Predetermined threshold value is lower than the handover event activation threshold value, and concrete value can obtain by emulation or route.Configuration module 440 can be the above-mentioned predetermined threshold value of user device configuration by special-purpose down-run survey configuration messages.
Above-mentioned configuration module 440 is the parts that are responsible for the user device configuration predetermined threshold value in the above base station equipment 400, can be software, hardware or both combinations.
Above-mentioned switching preparation module 420 comprises:
Send submodule 421, be used for sending handoff request according to measurement report to non-service cell, making this non-service cell is user equipment allocation contextual information and reservation Radio Resource.
Receive submodule 422, be used to receive switching request response from non-service cell.
The technical scheme of the embodiment of the invention has the following advantages, because network side is before the radio resource control connection reestablishment of accepting the subscriber equipment initiation, switch preparation according to measurement report from subscriber equipment, therefore, can farthest improve the success rate of radio resource control connection reestablishment, reduce user's cutting off rate, improved user's experience.
A kind of radio resource control connection reestablishment method and equipment are provided in the above embodiment of the present invention, and correspondingly, the present invention also provides by following examples and has been applied to system for carrying out said process.
As shown in Figure 5, a kind of radio resource control connection reestablishment system configuration schematic diagram in the embodiment of the invention five comprises subscriber equipment 510, serving BS 520 and non-serving base stations 530.
Wherein, subscriber equipment 510 is used for after detecting the Radio Link problem, and the Serving cell transmission measurement report to serving BS 520 comprises indication information in this measurement report, and this indication information is used to indicate this measurement report to be triggered by the Radio Link problem; After judging the generation Radio Link Failure, trigger the radio resource control connection reestablishment process, carry out cell selecting, and initiate radio resource control connection reestablishment to the sub-district of selecting.
When subscriber equipment 510 detected network and the Radio Link problem occurs, network communication was not interrupted, and the subscriber equipment 510 of this moment still is in connection status, and the Serving cell of serving BS 520 can correctly receive measurement report with certain probability.
Serving BS 520 is used for according to the measurement report from subscriber equipment 510 that receives, switches preparation with the non-service cell of non-serving base stations 530.
Non-serving base stations 530 is used for switching preparation with the Serving cell of serving BS 520, when the radio resource control connection reestablishment request that receives from subscriber equipment 510, carries out radio resource control connection reestablishment with subscriber equipment 510.
Particularly, after subscriber equipment 510 is judged the generation Radio Link Failure, non-service cell to non-serving base stations 530 sends the radio resource control connection reestablishment request, distribute contextual information and reserve Radio Resource if this non-service cell has been subscriber equipment 510, promptly finished to switch and prepared, then return the radio resource control connection reestablishment response, finish radio resource control connection reestablishment with subscriber equipment 510 to subscriber equipment 510.
Above-mentioned serving BS 520, specifically be used for sending handoff request to the non-service cell of non-serving base stations 530 according to measurement report, making this non-service cell is that subscriber equipment 510 distributes contextual information and reserves Radio Resource, and receives the switching request response from non-service cell.
Correspondingly, above-mentioned non-serving base stations 530, also be used for after finishing the switching preparation, start the resource reservation timer, and at the resource reservation timer expiry, and when not receiving the radio resource control connection reestablishment request that sends from subscriber equipment 510, discharge the Radio Resource of subscriber equipment 510 correspondences.
Above-mentioned subscriber equipment 510, also be used for after detecting the Radio Link problem, start and delay timer, delaying timer expiry, and radio link quality is not recovered just often, and the signal strength signal intensity that the measures cell information more than or equal to predetermined threshold value is added in the measurement report.
Correspondingly, above-mentioned serving BS 520 also is used to subscriber equipment 510 to be provided with and delays length of timer, by the down-run survey configuration messages of special use, is subscriber equipment 510 configuration predetermined threshold value.
The technical scheme of the embodiment of the invention has the following advantages, because before Radio Link Failure takes place, network side is finished to switch based on the measurement report from subscriber equipment that receives and is prepared, when subscriber equipment is initiated radio resource control connection reestablishment, network side exists a plurality of finishing to switch the non-service cell of preparing, the success rate that makes subscriber equipment rebuild the Radio Resource control connection is greatly improved, and has reached the purpose that reduces the conversation loss rate and improve user experience
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential general hardware platform, can certainly pass through hardware, but the former is better execution mode under a lot of situation.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in the storage medium, comprise that some instructions are with so that a station terminal equipment (can be mobile phone, personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be looked protection scope of the present invention.
It will be appreciated by those skilled in the art that the module in the device among the embodiment can be distributed in the device of embodiment according to the embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from present embodiment.The module of the foregoing description can be integrated in one, and also can separate deployment, can merge into a module, also can further split into a plurality of submodules.
The invention described above embodiment sequence number is not represented the quality of embodiment just to description.
More than disclosed only be several specific embodiment of the present invention, still, the present invention is not limited thereto, any those skilled in the art can think variation all should fall into protection scope of the present invention.
Claims (17)
1. a radio resource control connection reestablishment method is applied to comprise in the system of subscriber equipment, serving BS and non-serving base stations, it is characterized in that, said method comprising the steps of:
After described subscriber equipment detects the Radio Link problem, Serving cell to described serving BS sends measurement report, make described Serving cell switch preparation according to the non-service cell of described measurement report and described non-serving base stations, comprise indication information in the described measurement report, described indication information is used to indicate described measurement report to be triggered by the Radio Link problem;
Described subscriber equipment triggers the radio resource control connection reestablishment process after judging the generation Radio Link Failure, carries out cell selecting, initiates radio resource control connection reestablishment to the sub-district of selecting.
2. the method for claim 1 is characterized in that, described Serving cell switches preparation according to the non-service cell of described measurement report and non-serving base stations, comprising:
Described Serving cell sends handoff request according to described measurement report to described non-service cell;
Described non-service cell is described user equipment allocation contextual information and reserves Radio Resource;
Described non-service cell returns switching request response to described Serving cell.
3. method as claimed in claim 2 is characterized in that, when described non-service cell is described user equipment allocation contextual information and reservation Radio Resource, also comprises:
Described non-service cell starts the resource reservation timer;
Behind described resource reservation timer expiry, if described non-service cell does not receive the radio resource control connection reestablishment request that sends from described subscriber equipment, described non-service cell discharges the Radio Resource of described subscriber equipment correspondence.
4. the method for claim 1 is characterized in that, described subscriber equipment detects the Radio Link problem, and described subscriber equipment also comprises between the Serving cell transmission measurement report of serving BS:
Described subscriber equipment starts delays timer;
Described delay timer expiry after, normal if radio link quality is not recovered, described subscriber equipment adds the signal strength signal intensity that the measures cell information more than or equal to predetermined threshold value in the described measurement report to.
5. method as claimed in claim 4 is characterized in that, described subscriber equipment starts to be delayed before the timer, also comprises:
Described Serving cell is that described subscriber equipment is provided with the described length of timer of delaying.
6. method as claimed in claim 5 is characterized in that, described Serving cell is that described subscriber equipment is provided with the described length of timer of delaying, and comprising:
Described Serving cell is broadcasted the described length of timer of delaying in the system message of sub-district; Or
Described Serving cell sends the described length of timer of delaying to described subscriber equipment by the down-run survey configuration messages of special use.
7. method as claimed in claim 4 is characterized in that, described subscriber equipment also comprises before adding in the described measurement report more than or equal to the cell information of predetermined threshold value the signal strength signal intensity that measures
Described Serving cell is the described predetermined threshold value of described user device configuration by special-purpose down-run survey configuration messages.
8. a subscriber equipment is characterized in that, comprising:
Detection module is used to detect network and the Radio Link problem whether occurs;
Sending module, electrically connect with described detection module, be used for after described detection module detects the Radio Link problem, send measurement report to Serving cell, make described Serving cell switch preparation according to described measurement report and non-service cell, comprise indication information in the described measurement report, described indication information is used to indicate described measurement report to be triggered by the Radio Link problem;
Determination module is used for decision network whether Radio Link Failure takes place;
Rebuilding module electrically connects with described determination module, is used for triggering the radio resource control connection reestablishment process after described determination module judges that Radio Link Failure takes place, and carries out cell selecting, initiates radio resource control connection reestablishment to the sub-district of selecting.
9. as subscriber equipment as described in the claim 8, it is characterized in that, also comprise:
First time block is used for after described detection module detects the Radio Link problem, starts regularly;
Add module, electrically connect with described first time block, be used at described first time block overtimely, and radio link quality is not recovered just often, the signal strength signal intensity that the measures cell information more than or equal to predetermined threshold value is added in the described measurement report, use for described sending module.
10. a base station equipment is characterized in that, comprising:
Receiver module is used to receive the measurement report from subscriber equipment, comprises indication information in the described measurement report, and described indication information is used to indicate described measurement report to be triggered by the Radio Link problem;
Switch preparation module, electrically connect, be used for the described measurement report that receives according to described receiver module, switch preparation with the non-service cell of non-serving base stations with described receiver module.
11., it is characterized in that described switching preparation module comprises as base station equipment as described in the claim 10:
Send submodule, be used for sending handoff request according to described measurement report to described non-service cell, making described non-service cell is described user equipment allocation contextual information and reservation Radio Resource;
Receive submodule, be used to receive switching request response from described non-service cell.
12. as base station equipment as described in the claim 10, it is characterized in that, also comprise:
Module is set, is used to described subscriber equipment setting to delay length of timer, make described subscriber equipment after detecting the Radio Link problem, start the described timer of delaying;
Configuration module, be used to described user device configuration predetermined threshold value, make described subscriber equipment at the described timer expiry of delaying, and radio link quality do not recover just often, the signal strength signal intensity that the measures cell information more than or equal to described predetermined threshold value is added in the described measurement report.
13. a radio resource control connection reestablishment system comprises subscriber equipment, serving BS and non-serving base stations, it is characterized in that,
Described subscriber equipment is used for after detecting the Radio Link problem, and the Serving cell transmission measurement report to described serving BS comprises indication information in the described measurement report, and described indication information is used to indicate described measurement report to be triggered by the Radio Link problem; After judging the generation Radio Link Failure, trigger the radio resource control connection reestablishment process, carry out cell selecting, and initiate radio resource control connection reestablishment to the sub-district of selecting;
Described serving BS is used for according to the described measurement report from described subscriber equipment that receives, switches preparation with the non-service cell of described non-serving base stations;
Described non-serving base stations is used for switching preparation with the Serving cell of described serving BS, when the radio resource control connection reestablishment request that receives from described subscriber equipment, carries out radio resource control connection reestablishment with described subscriber equipment.
14. system as claimed in claim 13 is characterized in that,
Described serving BS, specifically be used for sending handoff request to the non-service cell of described non-serving base stations according to described measurement report, making described non-service cell is described user equipment allocation contextual information and reservation Radio Resource, and receives the switching request response from described non-service cell.
15. system as claimed in claim 14 is characterized in that,
Described non-serving base stations, also be used for after finishing the switching preparation, starting the resource reservation timer, at described resource reservation timer expiry, and when not receiving the radio resource control connection reestablishment request that sends from described subscriber equipment, discharge the Radio Resource of described subscriber equipment correspondence.
16. system as claimed in claim 13 is characterized in that,
Described subscriber equipment, also be used for after detecting the Radio Link problem, start and delay timer, and at the described timer expiry of delaying, and radio link quality is not recovered just often, and the signal strength signal intensity that the measures cell information more than or equal to predetermined threshold value is added in the described measurement report.
17. system as claimed in claim 16 is characterized in that,
Described serving BS also is used to described subscriber equipment that the described length of timer of delaying is set, and by the down-run survey configuration messages of special use, is the described predetermined threshold value of described user device configuration.
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| CN2009100833688A CN101883381A (en) | 2009-05-05 | 2009-05-05 | Radio resource control connection reestablishment method, equipment and system |
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| CN2009100833688A CN101883381A (en) | 2009-05-05 | 2009-05-05 | Radio resource control connection reestablishment method, equipment and system |
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| CN2009100833688A Pending CN101883381A (en) | 2009-05-05 | 2009-05-05 | Radio resource control connection reestablishment method, equipment and system |
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