CN102316509A - Method and system for reporting correlation measurement information of radio link failure - Google Patents
Method and system for reporting correlation measurement information of radio link failure Download PDFInfo
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- CN102316509A CN102316509A CN2010102227721A CN201010222772A CN102316509A CN 102316509 A CN102316509 A CN 102316509A CN 2010102227721 A CN2010102227721 A CN 2010102227721A CN 201010222772 A CN201010222772 A CN 201010222772A CN 102316509 A CN102316509 A CN 102316509A
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Abstract
The invention discloses a method and system for reporting correlation measurement information of radio link failure (RLF). The method comprises the step: user equipment (UE) generates RLF under a first base station, completes an RRC (Connection Re-establishment Complete) reestablishment or RRC establishment process to a second base station, and sends indication information of the correlation measurement information of the RLF to the second base station. The method also comprises the steps of: determining that the UE does not receives a command that the second base station requests the UE to report the correlation measurement information of the RLF; when the UE is switched to the third base station from the second base station, sending the indication information to a third base station by the UE or the second base station; and obtaining the correlation measurement information of the RLF from the UE by the third base station, and forwarding the obtained correlation measurement information of the RLF to the first base station. According to the invention, network performance is enhanced.
Description
Technical field
The present invention relates to the communications field, in particular to the report method and the system of a kind of Radio Link Failure (RadioLink Failure abbreviates RLF as) measurement of correlation information.
Background technology
Long Term Evolution (Long Term Evolution; Abbreviating LTE as) network is by evolution Universal Terrestrial Radio Access Network (Evolved Universal Terrestrial Radio AccessNetwork; Abbreviate E-UTRAN as) and evolution packet switching center (Evolved PacketCore; Abbreviate EPC as) to form, network presents flattening.Fig. 1 shows the composition framework of LTE network, and is as shown in Figure 1, and EUTRAN links to each other with EPC through the S1 interface.Wherein, EUTRAN is made up of a plurality of interconnective evolution base stations (Evolved NodeB abbreviates eNB as), connects through X2 interface between each eNB; EPC is made up of Mobility Management Entity (Mobility Management Entity abbreviates MME as) and service gateway entity (Serving Gateway abbreviates S-GW as).
In LTE, because wireless environment or subscriber equipment (User Equipment abbreviates UE as) are in factor affecting such as moving of network's coverage area; The connection that may cause UE takes place unusual; For example, possibly cause UE that RLF takes place, thereby influence the regular traffic of UE.For fear of this situation, need to detect as early as possible the reason that causes RLF, such as whether exist in the overlay area to cover leak, as shown in Figure 2.But handoff parameter also can cause UE that RLF takes place improperly in the LTE network; Such as maybe Serving cell causing the adjacent area that UE switches to a poor signal UE RLF to take place in the adjacent area; In order to optimize this situation; Self-organizing network function (Self-Organizing Network at LTE; Abbreviate SON as) in mobility robustness optimization (Mobility RobustnessOptimization abbreviates MRO as) has just been proposed, MRO can find the problem that current mobility parameter exists according to the behavior that RLF takes place UE.As shown in Figure 2, RLF has taken place in the UE that is in the sub-district 1 (belonging to eNB 1), and final UE has selected sub-district 2 (belonging to eNB2) to initiate reconstruction, and then eNB2 can send a RLF indication (RLF Indication) to eNB1 immediately according to the reconstruction message of UE.The identification information that wherein also has UE, such as the Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (C-RNTI) of UE, and message check value (ShortMAC-I).If the back context that has found this UE according to the identification information of UE is being received in sub-district 1; Explain then that before this RLF of UE is because sub-district 1 does not in time switch to it due to sub-district 2; Found that promptly UE 1 the situation in evening has taken place to switch in the sub-district, this moment, network side also can suitably be adjusted handoff parameter to evade this situation.
As previously mentioned, also may cause UE that RLF takes place owing to cover leak, this just may cause network side can't correctly judge the reason that causes RLF.In order in time to find covering problem or to find the improper problem of handoff parameter; A kind of method is to let UE be recorded in to take place the measurement result of signal quality of Serving cell and best peripheral cell before the RLF; Can also write down the measurement result of UE signal quality of measured Serving cell and best peripheral cell when initiate rebuilding subsequently, also can write down the positional information of UE.When UE sends the upright completion of RRC reconstruction message (RRC Connection Re-establishment Complete); Carry an indication information; Indication network side UE preserves the relevant metrical information of RLF (radio link failure); The measurement result of the signal quality of just above-mentioned Serving cell and best peripheral cell perhaps also comprises the positional information of UE.After network side is received this indication information; Can be through issuing UE information request message (UE InformationRequest); Notice UE reports the relevant metrical information of RLF; UE can report to network side to the relevant metrical information of the RLF that preserves through UE info response message (UE Information Response), and network side adjudicates whether there is the covering leak according to relevant information.For example, if the signal of Serving cell and best peripheral cell is all very poor, explanation exists one to cover leak here so, otherwise explanation possibly be the unreasonable RLF that causes of being provided with of handoff parameter.
If UE is not because a variety of causes carries out upright trial of RRC reconstruction or the upright trial failure of RRC reconstruction, UE can set up at RRC next time and pass through the indication information that information reporting RLF measurement of correlation information is accomplished in RRC foundation in the process so.After network side is received this indication information; Can be through issuing UE information request message (UE InformationRequest); Notice UE reports the metrical information of relevant RLF; UE can report to network side to the metrical information of relevant RLF through UE info response message (UE Information Response), and network side adjudicates whether there is the covering leak according to relevant information.
The inventor finds; In the correlation technique owing to base station edition is not supported, signaling traffic load is very high or other reason; UE is after rebuilding or set up successful base station and having reported the indication information of RLF measurement of correlation information, and this base station not transmitting order to lower levels notifies UE to report RLF measurement of correlation information, like this; The base station that it belongs in the time of just can't notifying RLF measurement of correlation information to UE generation RLF; The base station that belongs to when RLF takes place UE so just can't obtain the relevant metrical information of RLF, can't confirm that the reason covering leak of RLF still is that handoff parameter is provided with unreasonable causing, thus the adjustment of the handoff parameter that may lead to errors; Reduce user's impression, reduced the performance of network.
Summary of the invention
Main purpose of the present invention is to provide a kind of report method and system of Radio Link Failure measurement of correlation information, to address the above problem at least.
One aspect of the present invention provides a kind of report method of Radio Link Failure RLF measurement of correlation information; Comprise: RLF takes place in user equipment (UE) under first base station; The RRC that is accomplished to second base station rebuilds upright or RRC sets up process, and sends the indication information of RLF measurement of correlation information to second base station; Also comprise: confirm that UE does not receive that in the time period second base station requires UE to report the order of RLF measurement of correlation information; When second base station switched to the 3rd base station, indication information was sent to the 3rd base station in the UE or second base station at UE; The 3rd base station obtains RLF measurement of correlation information from UE, and the RLF measurement of correlation information that gets access to is transmitted to first base station.
Another aspect of the present invention provides a kind of report method of Radio Link Failure RLF measurement of correlation information; Comprise: RLF takes place in user equipment (UE) under first base station; The RRC that is accomplished to second base station rebuilds upright or RRC sets up process, and sends the indication information of RLF measurement of correlation information to second base station; Also comprise: UE confirms in the time period, not receive that second base station requires UE to report the order of RLF measurement of correlation information; UE repeats to send indication information to second base station, in the time period, receives the order from second base station until the number of times arrival preset value or the UE that send indication information.
Another aspect of the present invention provides a kind of reporting system of RLF measurement of correlation information; First base station under comprising when RLF takes place for UE, second base station and UE; UE is used for sending to second base station indication information of RLF measurement of correlation information; Second base station is that UE RRC takes place to accomplish behind the RLF rebuilds the purpose base station that upright or RRC sets up process, also comprises: processing unit and the 3rd base station, wherein; Processing unit comprises: determination module is used for confirming that UE does not receive that in the time period second base station requires UE to report the order of RLF measurement of correlation information; Sending module is used at UE sending indication information to the 3rd base station when second base station switches to the 3rd base station; The 3rd base station comprises: acquisition module is used for obtaining RLF measurement of correlation information from UE; Forwarding module is used for the RLF measurement of correlation information that gets access to is transmitted to first base station.
Another aspect of the present invention provides a kind of reporting system of RLF measurement of correlation information; First base station under comprising when RLF takes place for UE, second base station and UE; UE is used for sending to second base station indication information of RLF measurement of correlation information; Second base station is that UE RRC takes place to accomplish behind the RLF rebuilds the purpose base station that upright or RRC sets up process, and UE comprises: determination module is used to confirm in the time period, not receive that second base station requires UE to report the order of RLF measurement of correlation information; Sending module is used to repeat send indication information to second base station, in the time period, receives the order from second base station until the number of times arrival preset value or the UE that send indication information.
Through the present invention; Do not receive under the situation from the order that reports RLF measurement of correlation information of base station at UE; When switching to another sub-district; In handoff procedure, report the indication information of RLF measurement of correlation information, perhaps, UE reports the base station to the indication information of RLF measurement of correlation information in RRC reprovision process.Solved the low problem that causes network performance to descend of probability that the RLF measurement of correlation information in the correlation technique successfully reports, improved the success rate that reports of RLF measurement of correlation information, thereby improved network performance.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the sketch map according to the LTE network architecture of correlation technique;
Fig. 2 is the scene sketch map that causes RLF according to the covering leak of correlation technique and switching problem;
Fig. 3 is the flow chart according to the report method of a kind of RLF measurement of correlation information of the embodiment of the invention;
Fig. 4 is the structured flowchart according to the reporting system of a kind of RLF measurement of correlation information of the embodiment of the invention;
Fig. 5 is the flow chart that reports the indication information of RLF measurement of correlation information according to the UE of the embodiment of the invention 1 or 2;
Fig. 6 is the flow chart that transmits the indication information of RLF measurement of correlation information according to the base station of the embodiment of the invention 2 or 4;
Fig. 7 is the scene sketch map that switches after standing successfully according to the UE reconstruction of the embodiment of the invention 1 or 2;
Fig. 8 successfully carries out the scene sketch map that RRC sets up and switches after the upright failure of UE reconstruction according to the embodiment of the invention 3 or embodiment 4;
Fig. 9 is the flow chart according to the report method of the another kind of RLF measurement of correlation information of the embodiment of the invention;
Figure 10 is the structured flowchart according to the reporting system of the another kind of RLF measurement of correlation information of the embodiment of the invention.
Embodiment
Hereinafter will and combine embodiment to specify the present invention with reference to accompanying drawing.Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.
Fig. 3 is that this method comprises according to the flow chart of the report method of a kind of RLF measurement of correlation information of the embodiment of the invention:
RLF takes place in step S302, user equipment (UE) under first base station, the RRC that is accomplished to second base station rebuilds upright or RRC sets up process, and sends the indication information of RLF measurement of correlation information to second base station;
Step S304 confirms that UE does not receive that second base station requires UE to report the order of RLF measurement of correlation information in the time period (for example, predefined time period, interim time period of consulting);
Step S306, when second base station switched to the 3rd base station, indication information was sent to the 3rd base station in the UE or second base station at UE;
Step S308, the 3rd base station obtains RLF measurement of correlation information from UE, and the RLF measurement of correlation information that gets access to is transmitted to first base station.
In the correlation technique; Owing to base station edition is not supported, signaling traffic load is very high or other reason; After UE had reported the indication information of RLF measurement of correlation information to second base station, this second base station not transmitting order to lower levels notified UE to report RLF measurement of correlation information, like this; Second base station just can't be notified RLF measurement of correlation information to first base station; First base station just can't obtain the relevant metrical information of RLF so, thereby may cause first base station to carry out the adjustment of wrong handoff parameter, has reduced the performance of network.In the method that the embodiment of the invention provides; When UE switches; Send indication information to the target BS (i.e. the 3rd base station) that switches, first base station is issued after obtaining RLF measurement of correlation information in the 3rd base station, reports RLF measurement of correlation information success rate thereby improved to first base station; Therefore, improved the performance of network.
Preferably; Among the step S306; Sending indication information to the 3rd base station comprises: UE sends the handover-related message of carrying indication information to the 3rd base station, and wherein, handover-related message is to switch to the message that UE sends to the 3rd base station the process of the 3rd base station from second base station at UE; Perhaps, the handover-related message carry indication information is sent to the 3rd base station in second base station, and wherein, handover-related message is to switch to the message that send to the 3rd base station second base station the process of the 3rd base station from second base station at UE.Transmit indication information through existing handover-related message, need not new message is set, development difficulty is low, and because big or small less (generally being merely 1bit) of indication information is less to the change of handover-related message, is easy to realize.
Preferably, send to the 3rd base station under the situation of indication information through handover-related message at UE, handover-related message is accomplished message for the RRC reprovision; Send to the 3rd base station under the situation of indication information through handover-related message in second base station, handover-related message comprise following one of at least: handoff request message, sequence number state transfer message.Transmit indication information through existing message, less to existing flow process change, be easy to realize.
Preferably; Handover-related message is also carried UE and is rebuild the UE identification information in the upright request message at RRC, the UE identification information comprise following one of at least: the Cell Radio Network Temporary Identifier/Identity, Cell-RNTI under the sub-district that the PCI of the sub-district that first base station is had jurisdiction over, UE have jurisdiction in first base station, the check value of UE.After second base station gets access to the UE identification information, can the UE identification information be forwarded to first base station, be convenient to first base station and carry out accurate more RLF reason judgement.
Preferably; The RLF measurement of correlation information that gets access to is transmitted to first base station to be comprised: the RLF Indication message that the RLF measurement of correlation information that gets access to will be carried in the 3rd base station is forwarded to second base station, and the RLF Indication message that the RLF measurement of correlation information that gets access to will be carried in second base station is forwarded to first base station; Perhaps, the 3rd base station RLF Indication message that will carry the RLF measurement of correlation information that gets access to is forwarded to first base station.Because the RLF Indication message promptly is used to carry first base station at the UE identification information of judging RLF occurrence cause time institute foundation in correlation technique; Therefore; Transmit RLF measurement of correlation information (it also is the foundation of the first base station judges RLF occurrence cause) through existing RLF Indication message; More convenient during first base station processes, improved the treatment effeciency of first base station.
The above RLF measurement of correlation information comprise following one of at least: the measurement result of the signal quality measurement result of Serving cell before RLF takes place and best peripheral cell, the UE signal quality of measured Serving cell and best peripheral cell when initiating to rebuild subsequently, the positional information of UE.
Fig. 4 is the structured flowchart according to the reporting system of a kind of RLF measurement of correlation information of the embodiment of the invention; As shown in Figure 4; First base station 42 under this system comprises when RLF take place for UE 40, second base station 41 and UE 40, UE 40 is used for sending the indication information of RLF measurement of correlation information to second base station 41, and second base station 41 is that UE 40 RRC takes place to accomplish behind the RLF rebuilds the purpose base station that upright or RRC sets up process; This system also comprises: processing unit 43 and the 3rd base station 44; Wherein, processing unit 43 comprises: determination module 45 is used for confirming that UE 40 does not receive that in the time period second base station 41 requires UE 40 to report the order of RLF measurement of correlation information; Sending module 46 is used at UE 40 when second base station 41 switches to the 3rd base station 44, sends indication informations to the 3rd base station 44; The 3rd base station 44 comprises: acquisition module 47 is used for obtaining RLF measurement of correlation information from UE 40; Forwarding module 48 is used for the RLF measurement of correlation information that gets access to is transmitted to first base station 42.
In this system; The sending module 46 of processing unit 43 is when UE switches to the 3rd base station 44; Send indication information to the target BS (i.e. the 3rd base station 44) that switches, first base station 42 is issued after obtaining RLF measurement of correlation information in the 3rd base station 44, reports RLF measurement of correlation information success rate thereby improved to first base station 42; Therefore, improved the performance of network.
Preferably, processing unit 43 can be arranged in the UE 40 or second base station 41.
The embodiment 1 to 4 that below describes combines the technical scheme of above-mentioned a plurality of preferred embodiments.
Embodiment 1
This embodiment describes UE in detail after the RRC reconstruction is upright, sends the process of the indication information of Radio Link Failure measurement of correlation information through switching flow.Below in conjunction with Fig. 5 and Fig. 7 this process is described in detail, may further comprise the steps:
Step 1; UE resides in the sub-district of being had jurisdiction over base station 1 (Cell) 1; Owing to wireless quality variation or other reason cause having taken place RLF; UE has selected in the base station the 2 sub-district Cell 2 that had jurisdiction over to carry out RRC according to the cell selecting process and has rebuild upright process; UE is recorded in the Serving cell of RLF before taking place and the signal quality measurement result of best peripheral cell, can also write down the measurement result of UE signal quality of measured Serving cell and best peripheral cell when initiating to rebuild subsequently, can also write down the positional information of UE.UE rebuilds the upright indication information that has carried Radio Link Failure measurement of correlation information in the message (RRC Connection Re-establishment Complete) of accomplishing at RRC, and this indication information has indicated base station 2UE to preserve the relevant metrical information of RLF.
Step 2; Base station 2 receives that the RRC of UE rebuilds the upright indication information of accomplishing the Radio Link Failure measurement of correlation information in the message; Do not support heavier or other reason of the signaling traffic load that obtains or eat dishes without rice or wine of Radio Link Failure measurement of correlation information owing to the version of base station 2; The order that base station 2 does not obtain Radio Link Failure measurement of correlation information to this UE initiation, just the UE information request message (UE Information Request) of obtaining Radio Link Failure measurement of correlation information is not sent to UE in base station 2.
Step 3; UE switches to the cell 3 that base station 3 is had jurisdiction over from Cell 2; In handoff procedure; UE notifies base station 3 indication information of Radio Link Failure measurement of correlation information through handoff completion message, and just UE accomplishes message RRC ConnectionRe-configuration Complete at the RRC reprovision and carries the indication information of Radio Link Failure measurement of correlation information, can also contain UE and rebuild the UE identification information in the upright request message at RRC; Just the PCI of the sub-district of RLF, the Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (C-RNTI) of UE, check value (ShortMAC-I) take place in UE.
Step 4; Base station 3 is behind the indication information of receiving Radio Link Failure measurement of correlation information; Can issue UE information request message (UE Information Request); Let UE report the metrical information of relevant RLF, UE can report to base station 3 to the relevant metrical information of Radio Link Failure through UE info response message (UEInformation Response), can also contain UE and rebuild the UE identification information in the upright request message at RRC; Just the PCI of the sub-district of RLF, the Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (C-RNTI) of UE, check value (ShortMAC-I) take place in UE.Base station 3 can be sent to base station 1 to the message of the relevant metrical information of Radio Link Failure through X2 or S1, or is sent to base station 2, is transmitted to base station 1 by base station 2 again.Available message has RLF INDICATION message etc.
Step 5; The metrical information that Radio Link Failure is relevant is received in base station 1; In conjunction with other RLF information, judge that the reason covering leak of RLF still is that handoff parameter is provided with unreasonable causing, for example; The signal quality of Serving cell and best peripheral cell is all poor, and possibly there is the covering leak in explanation here so.Thereby carry out reasonable parameter optimization, improve systematic function.
Embodiment 2
This embodiment describes UE in detail after the RRC reconstruction is upright, and the process of the indication information of Radio Link Failure measurement of correlation information is transmitted in the base station through the message of handoff procedure.Below in conjunction with Fig. 6 and Fig. 7 this process is described in detail, may further comprise the steps:
Step 1; UE resides among the Cell 1 that is had jurisdiction over base station 1; Owing to wireless quality variation or other reason cause having taken place Radio Link Failure RLF; UE has selected in the base station the 2 sub-district Cell 2 that had jurisdiction over to carry out RRC according to the cell selecting process and has rebuild upright process; UE is recorded in the Serving cell of RLF before taking place and the signal quality measurement result of best peripheral cell, can also write down the measurement result of UE signal quality of measured Serving cell and best peripheral cell when initiating to rebuild subsequently, can also write down the positional information of UE.UE rebuilds the upright indication information that has carried Radio Link Failure measurement of correlation information in the message (RRC Connection Re-establishmentComplete) of accomplishing at RRC, and indication base station 2UE preserves the relevant metrical information of RLF.
Step 2; Base station 2 receives that the RRC of UE rebuilds the upright indication information of accomplishing the Radio Link Failure measurement of correlation information in the message; Do not support heavier or other reason of the signaling traffic load that obtains or eat dishes without rice or wine of Radio Link Failure measurement of correlation information owing to the version of base station 2; The order that base station 2 does not obtain Radio Link Failure measurement of correlation information to this UE initiation, just the UE information request message (UE Information Request) of obtaining Radio Link Failure measurement of correlation information is not sent to UE in base station 2.
Step 3; UE switches to the cell 3 that base station 3 is had jurisdiction over from Cell 2; In handoff procedure; Base station 2 is notified base station 3 indication information of Radio Link Failure measurement of correlation information through handoff request message, also carries the indication information of Radio Link Failure measurement of correlation information with regard to base station 2 in handoff request message, can also contain UE and rebuild the UE identification information in the upright request message at RRC; Just the PCI of the sub-district of RLF, the Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (C-RNTI) of UE, check value (ShortMAC-I) take place in UE.Wherein, message was HANDOVER REQUEST when the X2 switching took place, and message was HANDOVER REQUIRED and HANDOVER REQUEST when the S1 switching took place.Further; The indication information of Radio Link Failure measurement of correlation information also just can be carried in base station 2 in sequence number state transfer message; Can also contain UE and rebuild the UE identification information in the upright request message at RRC; Just the PCI of the sub-district of RLF, the Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (C-RNTI) of UE, check value (ShortMAC-I) take place in UE.Wherein, message SN STATUS TRANSFER message when the X2 switching takes place, message was eNBSTATUS TRANSFER and MME STATUS TRANSFER when the S1 switching took place.
Step 4; Base station 3 is behind the indication information of receiving Radio Link Failure measurement of correlation information; Can issue UE information request message (UE Information Request); Let UE report the metrical information of relevant RLF, UE can report to base station 3 to the relevant metrical information of Radio Link Failure through UE info response message (UEInformation Response), can also contain UE in the UE info response message and rebuild the UE identification information in the upright request message at RRC; Just the PCI of the sub-district of RLF, the Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (C-RNTI) of UE, check value (ShortMAC-I) take place in UE.Base station 3 can be sent to base station 1 to the message of the relevant metrical information of Radio Link Failure through X2 or S1, or is sent to base station 2, is transmitted to base station 1 by base station 2 again.Available message has RLFINDICATION message etc.
Step 5; The metrical information that Radio Link Failure is relevant is received in base station 1; In conjunction with other RLF information, judge that the reason covering leak of RLF still is that handoff parameter is provided with unreasonable causing, for example; The signal quality of Serving cell and best peripheral cell is all poor, and possibly there is the covering leak in explanation here so.Thereby carry out reasonable parameter optimization, improve systematic function.
Embodiment 3
This embodiment describes UE in detail after RRC sets up completion, sends the process of the indication information of Radio Link Failure measurement of correlation information through switching flow.Below in conjunction with Fig. 5 and Fig. 8 this process is described in detail, may further comprise the steps:
Step 1; UE resides among the Cell 1 that is had jurisdiction over base station 1; Owing to wireless quality variation or other reason cause having taken place Radio Link Failure RLF; UE has selected in the base station the 4 sub-district Cell 4 that had jurisdiction over to carry out RRC according to the cell selecting process and has rebuild upright process; UE is recorded in the Serving cell of RLF before taking place and the signal quality measurement result of best peripheral cell, can also write down the measurement result of UE signal quality of measured Serving cell and best peripheral cell when initiating to rebuild subsequently, perhaps also writes down the positional information of UE.UE rebuilds upright process because a variety of causes leads to the failure and changes the idle attitude at RRC; The cell2 that UE has selected base station 2 to be had jurisdiction over carries out RRC and sets up; UE sets up at RRC and accomplishes the indication information that contains Radio Link Failure measurement of correlation information in the message, and indication base station 2UE preserves the relevant metrical information of Radio Link Failure.
Step 2; Base station 2 receives that the RRC of UE sets up the indication information of accomplishing the Radio Link Failure measurement of correlation information in the message; Do not support heavier or other reason of the signaling traffic load that obtains or eat dishes without rice or wine of Radio Link Failure measurement of correlation information owing to the version of base station 2; The order that base station 2 does not obtain Radio Link Failure measurement of correlation information to this UE initiation, just the UE information request message (UE Information Request) of obtaining Radio Link Failure measurement of correlation information is not sent to UE in base station 2.
Step 3; UE switches to the cell 3 that base station 3 is had jurisdiction over from Cell 2; In handoff procedure; UE notifies base station 3 indication information of Radio Link Failure measurement of correlation information through handoff completion message, and just UE reshuffles completion message RRCConnection Re-configuration Complete at RRC and carries the indication information of Radio Link Failure measurement of correlation information, can also contain UE and rebuild the UE identification information in the upright request message at RRC; Just the PCI of the sub-district of RLF, the Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (C-RNTI) of UE, check value (ShortMAC-I) take place in UE.
Step 4; Base station 3 is behind the indication information of receiving Radio Link Failure measurement of correlation information; Can issue UE information request message (UE Information Request); Let UE report the metrical information of relevant RLF, UE can report to base station 3 to the relevant metrical information of Radio Link Failure through UE info response message (UEInformationResponse), can also contain UE and rebuild the UE identification information in the upright request message at RRC; Just the PCI of the sub-district of RLF, the Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (C-RNTI) of UE, check value (ShortMAC-I) take place in UE.Base station 3 can be sent to base station 1 to the message of the relevant metrical information of Radio Link Failure through X2 or S1, or is sent to base station 2, is transmitted to base station 1 by base station 2 again.Available message has RLF INDICATION message etc.
Step 5; The metrical information that Radio Link Failure is relevant is received in base station 1; In conjunction with other RLF information; It still is that handoff parameter is provided with unreasonable causing that the reason of judging RLF covers leak, and for example the signal quality of Serving cell and best peripheral cell is all poor, and possibly there is the covering leak in explanation here so.Thereby carry out reasonable parameter optimization, improve systematic function.
Embodiment 4
This embodiment describes UE in detail after RRC sets up completion, and the process of the indication information of Radio Link Failure measurement of correlation information is transmitted in the base station through the message of handoff procedure.Below in conjunction with Fig. 6 and Fig. 8 this process is described in detail, may further comprise the steps:
Step 1; UE resides among the Cell 1 that is had jurisdiction over base station 1; Owing to wireless quality variation or other reason cause having taken place Radio Link Failure RLF; UE has selected in the base station the 4 sub-district Cell 4 that had jurisdiction over to carry out RRC according to the cell selecting process and has rebuild upright process; UE is recorded in the Serving cell of RLF before taking place and the signal quality measurement result of best peripheral cell, can also write down the measurement result of UE signal quality of measured Serving cell and best peripheral cell when initiating to rebuild subsequently, perhaps also writes down the positional information of UE.UE rebuilds upright process because a variety of causes leads to the failure and changes the idle attitude at RRC; The cell2 that UE has selected base station 2 to be had jurisdiction over carries out RRC and sets up; UE sets up at RRC and accomplishes the indication information that contains Radio Link Failure measurement of correlation information in the message, and indication base station 2UE preserves the relevant metrical information of Radio Link Failure.
Step 2; Base station 2 receives that the RRC of UE sets up the indication information of accomplishing the Radio Link Failure measurement of correlation information in the message; Do not support heavier or other reason of the signaling traffic load that obtains or eat dishes without rice or wine of Radio Link Failure measurement of correlation information owing to the version of base station 2; The order that base station 2 does not obtain Radio Link Failure measurement of correlation information to this UE initiation, just the UE information request message (UE Information Request) of obtaining Radio Link Failure measurement of correlation information is not sent to UE in base station 2.
Step 3; UE switches to the cell 3 that base station 3 is had jurisdiction over from Cell 2; In handoff procedure; Base station 2 is notified base station 3 indication information of Radio Link Failure measurement of correlation information through handoff request message, also carries the indication information of Radio Link Failure measurement of correlation information with regard to base station 2 in handoff request message, can also contain UE and rebuild the UE identification information in the upright request message at RRC; Just the PCI of the sub-district of RLF, the Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (C-RNTI) of UE, check value (ShortMAC-I) take place in UE.Wherein, message was HANDOVER REQUEST when the X2 switching took place, and message was HANDOVER REQUIRED and HANDOVER REQUEST when the S1 switching took place.Further; The indication information of Radio Link Failure measurement of correlation information also just can be carried in base station 2 in sequence number state transfer message; Can also contain UE and rebuild the UE identification information in the upright request message at RRC; Just the PCI of the sub-district of RLF, the Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (C-RNTI) of UE, check value (ShortMAC-I) take place in UE.Wherein, message SN STATUS TRANSFER message when the X2 switching takes place, message was eNBSTATUS TRANSFER and MME STATUS TRANSFER when the S1 switching took place.
Step 4; Base station 3 is behind the indication information of receiving Radio Link Failure measurement of correlation information; Can issue UE information request message (UE Information Request); Let UE report the metrical information of relevant RLF, UE can report to base station 3 to the relevant metrical information of Radio Link Failure through UE info response message (UEInformation Response), and the UE info response message can also contain UE rebuilds the UE identification information in the upright request message at RRC; Just the PCI of the sub-district of RLF, the Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (C-RNTI) of UE, check value (ShortMAC-I) take place in UE.Base station 3 can be sent to base station 1 to the message of the relevant metrical information of Radio Link Failure through X2 or S1, or is sent to base station 2, is transmitted to base station 1 by base station 2 again.Available message has RLFINDICATION message etc.
Step 5; The metrical information that Radio Link Failure is relevant is received in base station 1; In conjunction with other RLF information, judge that the reason covering leak of RLF still is that handoff parameter is provided with unreasonable causing, for example; The signal quality of Serving cell and best peripheral cell is all poor, and possibly there is the covering leak in explanation here so.Thereby carry out reasonable parameter optimization, improve systematic function.
Fig. 9 is that this method comprises according to the flow chart of the report method of the another kind of RLF measurement of correlation information of the embodiment of the invention:
RLF takes place in step S902, user equipment (UE) under first base station, the RRC that is accomplished to second base station rebuilds upright or RRC sets up process, and sends the indication information of RLF measurement of correlation information to second base station;
Step S904, UE confirm in the time period (for example, predefined time period, interim time period of consulting), not receive that second base station requires UE to report the order of RLF measurement of correlation information;
Step S906, UE repeat to send indication information to second base station, in the time period, receive the order from second base station until the number of times arrival preset value or the UE that send indication information.
In the correlation technique; Owing to base station edition is not supported, signaling traffic load is very high or other reason; After UE had reported the indication information of RLF measurement of correlation information to second base station, this second base station not transmitting order to lower levels notified UE to report RLF measurement of correlation information, like this; Second base station just can't be notified RLF measurement of correlation information to first base station; First base station just can't obtain the relevant metrical information of RLF so, thereby may cause first base station to carry out the adjustment of wrong handoff parameter, has reduced the performance of network.In the method that the embodiment of the invention provides; UE repeats to send indication information to second base station, arrive preset value or UE receives the order from second base station in the time period until the number of times that sends indication information, has improved second base station obtains probability from RLF measurement of correlation information to UE; Because second base station can be sent to first base station with the RLF measurement of correlation information that gets access to; Therefore, improve the success rate that reports RLF measurement of correlation information to first base station, thereby improved the performance of network.
Preferably, UE repeats to comprise to second base station transmission indication information: UE sends the RRC reprovision that carries indication information to second base station and accomplishes message and/or measurement report message.Accomplish message through the RRC reprovision and carry indication information, need not new message is set, development difficulty is low, and because the size less (generally being merely 1bit) of indication information is less to the change of handover-related message, is easy to realize.
The above RLF measurement of correlation information comprise following one of at least: the measurement result of the signal quality measurement result of Serving cell before RLF takes place and best peripheral cell, the UE signal quality of measured Serving cell and best peripheral cell when initiating to rebuild subsequently, the positional information of UE.
Figure 10 is the structured flowchart according to the reporting system of the another kind of RLF measurement of correlation information of the embodiment of the invention; Shown in figure 10; First base station 102 under this system comprises when RLF takes place for UE 100, second base station 101 and UE 100; UE 100 is used for sending the indication information of RLF measurement of correlation information to second base station 101; Second base station 101 is that UE 100 RRC takes place to accomplish behind the RLF rebuilds the purpose base station that upright or RRC sets up process, and UE 100 comprises: determination module 103 is used to confirm in the time period, not receive that second base station 101 requires UE 100 to report the order of RLF measurement of correlation information; Sending module 104 is used to repeat send indication information to second base station 101, in the time period, receives the order from second base station 101 until the number of times arrival preset value or the UE 100 that send indication information.
In this system; The sending module 104 of UE 100 repeats to send indication information to second base station 101; Number of times arrival preset value or UE 100 until sending indication information receive the order from second base station 101 in the time period; Improve second base station 101 to the probability that UE100 obtains RLF measurement of correlation information, because understand second base station 101 the RLF measurement of correlation information that gets access to has been sent to first base station 102, therefore; Improved to first base station 102 and reported the success rate of RLF measurement of correlation information, thereby improved the performance of network.
The embodiment 5 that describes below combines the technical scheme of above-mentioned a plurality of preferred embodiments.
Embodiment 5
This embodiment describes the process that UE sends the indication information of Radio Link Failure measurement of correlation information through the RRC reallocation message in detail, may further comprise the steps:
Step 1; UE resides among the Cell 1 that is had jurisdiction over base station 1; Owing to wireless quality variation or other reason cause having taken place Radio Link Failure RLF; UE has selected to carry out RRC at the cell2 that UE has selected base station 2 to be had jurisdiction over according to the cell selecting process and has rebuild upright; UE is recorded in the Serving cell of RLF before taking place and the signal quality measurement result of best peripheral cell, can also write down the measurement result of UE signal quality of measured Serving cell and best peripheral cell when initiating to rebuild subsequently, perhaps also writes down the positional information of UE.The cell2 that UE has selected base station 2 to be had jurisdiction over carries out the RRC reconstruction and stands successfully, and UE rebuilds the upright indication information that contains Radio Link Failure measurement of correlation information in the message of accomplishing at RRC, and indication base station 2UE preserves the metrical information that Radio Link Failure is correlated with.
Step 2; Base station 2 receives that the RRC of UE rebuilds the upright indication information of accomplishing the Radio Link Failure measurement of correlation information in the message; Heavier or other reason owing to the signaling traffic load of eating dishes without rice or wine; The order that base station 2 does not obtain Radio Link Failure measurement of correlation information to this UE initiation, just the UE information request message (UE Information Request) of obtaining Radio Link Failure measurement of correlation information is not sent to UE in base station 2.
Step 3, the RRC reallocation message is sent to UE in base station 2, carries out reshuffling of various parameters, for example, carries out reshuffling of service parameter.UE returns the RRC reprovision for base station 2 and accomplishes message after configuration successful, wherein carries the indication information of Radio Link Failure measurement of correlation information.Perhaps UE also can carry the indication information of Radio Link Failure measurement of correlation information, for example measurement report message Measurement Report in other upstream message.
Step 4; Base station 2 is behind the indication information of receiving Radio Link Failure measurement of correlation information; Can issue UE information request message (UE Information Request); Let UE report the metrical information of relevant RLF, UE can report to base station 2 to the relevant metrical information of Radio Link Failure through UE info response message (UEInformation Response).Base station 2 can be sent to base station 1 to the message of the relevant metrical information of Radio Link Failure through X2 or S1.Available message has RLF INDICATION message etc.
Step 5; The metrical information that Radio Link Failure is relevant is received in base station 1; In conjunction with other RLF information, judge that the reason covering leak of RLF still is that handoff parameter is provided with unreasonable causing, for example; The signal quality of Serving cell and best peripheral cell is all poor, and possibly there is the covering leak in explanation here so.Thereby carry out reasonable parameter optimization, improve systematic function.
In sum; The scheme that the embodiment of the invention provides makes UE can effectively report the indication information of Radio Link Failure metrical information; Network side can get access to Radio Link Failure measurement of correlation information, thereby according to the Radio Link Failure measurement of correlation information that UE reports, effectively distinguishes because the Radio Link Failure problem that the mobility parameter causes; For mobile robustness optimization provides input more accurately, thereby improve the performance of network.
Need to prove; Can in computer system, carry out in the step shown in the flow chart of accompanying drawing such as a set of computer-executable instructions; And; Though logical order has been shown in flow chart, in some cases, can have carried out step shown or that describe with the order that is different from here.
Obviously, it is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize with the general calculation device; They can concentrate on the single calculation element; Perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element; Thereby; Can they be stored in the storage device and carry out, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize by calculation element.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the report method of a Radio Link Failure RLF measurement of correlation information; Comprise: RLF takes place in user equipment (UE) under first base station; The RRC that is accomplished to second base station rebuilds upright or RRC sets up process, and sends the indication information of RLF measurement of correlation information to said second base station; It is characterized in that, also comprise:
Confirm that said UE does not receive that in the time period said second base station requires said UE to report the order of said RLF measurement of correlation information;
When said second base station switched to the 3rd base station, said indication information was sent to said the 3rd base station in UE or said second base station at said UE;
Said the 3rd base station obtains RLF measurement of correlation information from said UE, and the said RLF measurement of correlation information that gets access to is transmitted to said first base station.
2. method according to claim 1 is characterized in that, sends said indication information to said the 3rd base station and comprises:
Said UE sends the handover-related message of carrying said indication information to said the 3rd base station, and wherein, said handover-related message is to switch to the message that UE sends to said the 3rd base station the process of said the 3rd base station from said second base station at said UE; Perhaps,
The handover-related message of carrying said indication information is sent in said second base station to said the 3rd base station; Wherein, said handover-related message is to switch to the message that send to said the 3rd base station second base station described in the process of said the 3rd base station from said second base station at said UE.
3. method according to claim 2 is characterized in that, sends under the situation of said indication information to said the 3rd base station through handover-related message at said UE, and said handover-related message is accomplished message for the RRC reprovision; Send under the situation of said indication information to said the 3rd base station through handover-related message in said second base station, said handover-related message comprise following one of at least: handoff request message, sequence number state transfer message.
4. method according to claim 2; It is characterized in that; Said handover-related message is also carried said UE and is rebuild the UE identification information in the upright request message at RRC, said UE identification information comprise following one of at least: the Cell Radio Network Temporary Identifier/Identity, Cell-RNTI under the sub-district that the PCI of the sub-district that said first base station is had jurisdiction over, said UE have jurisdiction in said first base station, the check value of said UE.
5. method according to claim 1 is characterized in that, the said RLF measurement of correlation information that gets access to is transmitted to said first base station comprises:
The RLF Indication message that the said RLF measurement of correlation information that gets access to will be carried in said the 3rd base station is forwarded to said second base station, and the RLF Indication message that the said RLF measurement of correlation information that gets access to will be carried in said second base station is forwarded to said first base station; Perhaps,
The RLF Indication message that the said RLF measurement of correlation information that gets access to will be carried in said the 3rd base station is forwarded to said first base station.
6. the report method of a RLF measurement of correlation information, comprising: RLF takes place in user equipment (UE) under first base station, and the RRC that is accomplished to second base station rebuilds upright or RRC sets up process, and sends the indication information of RLF measurement of correlation information to said second base station; It is characterized in that, also comprise:
Said UE confirms in the time period, not receive that said second base station requires said UE to report the order of said RLF measurement of correlation information;
Said UE repeats to send said indication information to said second base station, in the said time period, receives the said order from said second base station until the number of times arrival preset value or the said UE that send said indication information.
7. method according to claim 6 is characterized in that, said UE repeats to send said indication information to said second base station and comprises:
Said UE sends the RRC reprovision that carries said indication information to said second base station and accomplishes message and/or measurement report message.
8. the reporting system of a RLF measurement of correlation information; First base station under comprising when RLF takes place for UE, second base station and said UE, said UE is used for sending to said second base station indication information of RLF measurement of correlation information, and said second base station is that said UE RRC takes place to accomplish behind the RLF rebuilds the purpose base station that upright or RRC sets up process; It is characterized in that; Also comprise: processing unit and the 3rd base station, wherein
Said processing unit comprises:
Determination module is used for confirming that said UE does not receive that in the time period said second base station requires said UE to report the order of said RLF measurement of correlation information;
Sending module is used for when said UE switches to said the 3rd base station from said second base station, sending said indication information to said the 3rd base station;
Said the 3rd base station comprises:
Acquisition module is used for obtaining RLF measurement of correlation information from said UE;
Forwarding module is used for the said RLF measurement of correlation information that gets access to is transmitted to said first base station.
9. system according to claim 8 is characterized in that, said processing unit is arranged in said UE or said second base station.
10. the reporting system of a RLF measurement of correlation information; First base station under comprising when RLF takes place for UE, second base station and said UE; Said UE is used for sending to said second base station indication information of RLF measurement of correlation information; Said second base station is that said UE RRC takes place to accomplish behind the RLF rebuilds the purpose base station that upright or RRC sets up process, it is characterized in that said UE comprises:
Determination module is used to confirm in the time period, not receive that said second base station requires said UE to report the order of said RLF measurement of correlation information;
Sending module is used to repeat send said indication information to said second base station, in the said time period, receives the said order from said second base station until the number of times arrival preset value or the said UE that send said indication information.
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| CN105075365A (en) * | 2013-03-22 | 2015-11-18 | 夏普株式会社 | Systems and methods for establishing multiple radio connections |
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| WO2015027381A1 (en) * | 2013-08-26 | 2015-03-05 | 华为技术有限公司 | Radio link failure handling method, user equipment and base station |
| WO2020108576A1 (en) * | 2018-11-29 | 2020-06-04 | 华为技术有限公司 | Method and apparatus for transmitting information |
| CN111586739A (en) * | 2019-02-15 | 2020-08-25 | 华为技术有限公司 | Information processing method and device |
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| CN102316509B (en) | 2016-03-02 |
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