CN103108403B - Across base station RRC connection reconstructions method and system - Google Patents

Across base station RRC connection reconstructions method and system Download PDF

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Publication number
CN103108403B
CN103108403B CN201110354431.4A CN201110354431A CN103108403B CN 103108403 B CN103108403 B CN 103108403B CN 201110354431 A CN201110354431 A CN 201110354431A CN 103108403 B CN103108403 B CN 103108403B
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mme
target
base station
message
context
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CN103108403A (en
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李廉
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Shenzhen Zhongzhou Technology Co. Ltd.
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Shenzhen Zhongzhou Technology Co Ltd
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Abstract

The invention discloses across the base station RRC connection reconstructions method and system of one kind, the above method asks above-mentioned UE context to MME after the RRC Connection Re establishment Request message that target BS receives that UE is reported；MME passes to the request of target BS the source base station belonging to UE, and the context transfer that source base station is returned is to target BS；After target BS receives UE context, notice UE carries out RRC connection reconstructions, and after UE completes RRC connection reconstructions, distributes physical resource for UE, notice UE carries out RRC resources and matched somebody with somebody again.In the case of Target cell and the different base station in cell-of-origin, the application layer service of UE sides, which is thrown away to normally complete, to continue, and shortens business interruption time, improves Consumer's Experience.

Description

Across base station RRC connection reconstructions method and system
Technical field
The present invention relates to the forth generation mobile communication LTE of the communications field (Long Term Evolution, Long Term Evolution) system System, more particularly to a kind of across base station RRC (Radio Resource Control, wireless heterogeneous networks) connection reconstruction methods and be System.
Background technology
Clear and definite definition is carried out to RRC connection reconstructions flow in 3GPP TS 36.331, when terminal (UE) satisfaction is as follows During condition, it will initiate RRC and rebuild request：
Detect Radio Link Failure；
Intra-system handover fails；
Intersystem handover fails；
Integrity checking fails；
RRC reconfiguration failures.
After UE, which is detected, meets above-mentioned condition, cell search process will be carried out, reselecting persistent district, (i.e. target is small Area) with initiating random access procedure, resident base station (i.e. target BS) sends RRC Connection backward for Stochastic accessing success Re-establishment Request message, instruction target BS are that UE redistributes physical resource, and in the message Carry PCI (Physical Cell Identity, the physical area mark of cell-of-origin (i.e. cell resident UE before RRC is rebuild) Know), UE marks, rebuild the information such as reason.
The RRC of protocol definition, which rebuilds flow, includes RRC reconstruction normal flows and abnormal flow.In actual applications, UE exists When carrying out cell selection, the Target cell of selection may be with cell-of-origin cobasis station, it is also possible to different base station.It is small with source in Target cell Under the scene at area cobasis station, Target cell can obtain communicating context informations of the UE in cell-of-origin, successfully complete RRC and rebuild Journey；Under the scene of Target cell Yu the different base station in cell-of-origin, Target cell, which can not obtain communication contexts of the UE in cell-of-origin, to be believed Breath, therefore normal RRC process of reconstruction can not be completed, the reestablishment rejected message of RRC, UE release RRC connections can only be sent to UE.
For cobasis yard scape, UE sides can normally complete using layer service and continue, and business interruption time is shorter.For different Base station scene, because base station side discharges RRC connections completely, cause UE needs and base station side again initiating business request process, by Business is reassigned in core net, and ability finishing service continues, and the application layer business continuing time is longer, influences user's impression.
The content of the invention
It is an object of the present invention to provide across the base station RRC connection reconstructions method and system of one kind, to solve prior art in mesh In the case of marking cell and source small difference base station, the problem of can only being continued by UE again initiating business request ability finishing services.
The invention provides across the base station wireless resource control RRC connection reconstructions method of one kind, the above method is：
Target BS receives the RRC Connection Re-establishment Request message that terminal UE reports Afterwards, above-mentioned UE context is asked to the MME (mobile management entity) of core net；
Above-mentioned MME passes to the request of above-mentioned target BS the source base station belonging to above-mentioned UE, and above-mentioned source base station is returned The context transfer returned gives above-mentioned target BS；
After above-mentioned target BS receives above-mentioned UE context, above-mentioned UE is notified to carry out RRC connection reconstructions；
After above-mentioned UE completes RRC connection reconstructions, above-mentioned target BS is that above-mentioned UE distributes physical resource, and notifies above-mentioned UE RRC resources are carried out again to match somebody with somebody.
Invention further provides across the base station RRC connection reconstructions system of one kind, including target BS, MME and source base station,
Above-mentioned target BS, in the RRC Connection Re-establishment for receiving UE and reporting During Request message, above-mentioned UE context is asked to above-mentioned MME by UE Context Switch Request message；With And after above-mentioned UE context is received, above-mentioned UE is notified to carry out RRC connection reconstructions；After above-mentioned UE completes RRC connection reconstructions, Physical resource is distributed for above-mentioned UE, and notifies above-mentioned UE to carry out RRC resources and match somebody with somebody again；
Above-mentioned MME, for being asked above-mentioned target BS by UE Context Switch Request Forward message The UE Context Switch Request message transmissions of UE contexts are sought to the source base station belonging to above-mentioned UE, and by above-mentioned source The context transfer that base station returns gives above-mentioned target BS；
Above-mentioned source base station, it is above-mentioned for being sent to above-mentioned UE context by Handover Required message MME。
The present invention by receive the target BS of RRC Connection Re-establishment Request message to The source base station for preserving UE contextual informations initiates the reorientation flow based on S1 mouths, and is receiving the context letter of source base station return After breath, RRC connection reconstitution process is completed to realize UE RRC connection reconstructions in target BS side so that Target cell is small with source In the case of the different base station in area, the application layer service of UE sides, which is thrown away to normally complete, to continue, and shortens business interruption time, improves use Experience at family.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, forms the part of the present invention, this hair Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is across the base station RRC connection reconstructions method preferred embodiment flow chart of the present invention；
Fig. 2 is the theory diagram of across the base station RRC connection reconstructions System Preferred embodiments of the present invention.
Embodiment
In order that technical problems, technical solutions and advantages to be solved are clearer, clear, tie below Drawings and examples are closed, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only used To explain the present invention, it is not intended to limit the present invention.
As shown in figure 1, be across the base station RRC connection reconstructions method preferred embodiment flow chart of the present invention, this implementations including with Lower step：
Step S001：UE, which is detected, to be needed to initiate RRC reconstructions, and searches Target cell, then to the affiliated base of Target cell Stand, i.e., target BS reports RRC Connection Re-establishment Request message, asks RRC connection reconstructions；
Above-mentioned UE cell-of-origin is carried in RRC Connection Re-establishment Request message PCI and Target cell PCI.
Step S002：Target BS is according to receiving RRC Connection Re-establishment Request message The PCI of middle carrying, judge the cell of UE this non-base station of cell-of-origin, then send UE Context Switch Request and disappear The MME to core net is ceased, UE context is asked to MME；
UE Context Switch Request message is the message increased newly in the present invention, and it carries above-mentioned target base Base station S1 mouths application identities, the MME S1 mouth application identities stood as UE distribution, UE C-RNTI (Cell Radio Network Temporary Identifier, cell-radio network user temporary mark) and UE cell-of-origin PCI.
While target BS sends UE Context Switch Request message, also start a timer, judge Whether MME returns to UE context in timer time, if time-out does not receive the above-mentioned UE of MME returns context, leads to Know UE, the failure of RRC connection reconstructions.
Step S003：After MME receives UE Context Switch Request message, the source first in message is small Area PCI, the source base station belonging to UE is determined, above-mentioned message is then passed through into UE Context Switch Request Forward Message transmission is to source base station；
UE Context Switch Request Forward message is also the newly-increased message of the present invention, for transmitting UE Context Switch Request message.
Step S004：After source base station receives UE Context Switch Request Forward message, pass through UE context is sent to MME by Handover Required message, informs that MME needs to switch over；
Step S005：After MME receives Handover Required message, UE contexts therein are passed through into Handover Request message transmissions switch over to target BS, notice target BS；
Step S006：After target BS receives Handover Request message, RRC Connection are sent to UE Reestablishment message, notice UE carry out RRC connection reconstructions；
Step S007：After UE receives RRC Connection Reestablishment message, RRC connection reconstructions are carried out, After the completion of return to RRC Connection Re-establishment Complete message, notice target BS RRC connections weigh Build completion；
Step S008：After target BS receives RRC Connection Re-establishment Complete message, Physical resource is distributed for UE；
Step S009：Send RRC Connection Reconfiguration message and carry out RRC connections to UE, notice UE Match somebody with somebody again, and send Handover Request Acknowledge message simultaneously and completed to above-mentioned MME, notice MME switchings；
Step S010：After UE receives RRC Connection Reconfiguration message, carry out RRC connections and match somebody with somebody again, After the completion of return RRC Connection Reconfiguration Complete message, notice target BS RRC connections match somebody with somebody again Complete；
UE and MME is handled after receiving message, and in actual applications, UE and MME are possible to handle what is received simultaneously Message, the present embodiment for convenience, therefore first describes UE processing procedure, then describes MME processing procedure.
Step S011：After MME receives mutual Handover Request Acknowledge message, Handover is returned Command message switches over to source base station, notice source base station；
Step S012：After source base station receives Handover Command message, eNBStatus Transfer message is sent To above-mentioned MME, notice MME sends data by above-mentioned target BS to above-mentioned UE；
Step S013：After MME receives eNB Status Transfer message, MME Status are sent to institute's target BS Transfer message, notice target BS prepare to receive UE data；
Step S014：After target BS receives MME Status Transfer message, return to Handover Notify and disappear Breath；
Step S015：After MME receives Handover Notify message, UE Context are sent to above-mentioned source base station Release Command message, above-mentioned source base station is notified to discharge above-mentioned UE context；
Step S016：After source base station receives UE Context Release Command message, UE context is discharged.
As shown in Fig. 2 be the theory diagram of across the base station RRC connection reconstructions System Preferred embodiments of the present invention, including target Base station, MME and source base station,
Target BS, for disappearing receiving the RRC Connection Re-establishment Request that UE reports During breath, above-mentioned UE context is asked to above-mentioned MME by UE Context Switch Request message, and is judged above-mentioned Whether MME returns to above-mentioned UE context in timer time, and in the upper of the overtime above-mentioned UE for not receiving above-mentioned MME and returning When hereafter, above-mentioned UERRC connection reconstructions are notified to fail；Or after above-mentioned UE context is received, above-mentioned UE is notified to carry out RRC Connection reconstruction；After above-mentioned UE completes RRC connection reconstructions, physical resource is distributed for above-mentioned UE, and notify above-mentioned UE to carry out RRC moneys Source is matched somebody with somebody again, while returns to Handover Request Acknowledge message to above-mentioned MME, and notice MME switchings are completed；And After MME Status Transfer message is received, return to Handover Notify message and give above-mentioned MME；
MME, for by UE Context Switch Request Forward message by above-mentioned target base station requests UE The UE Context Switch Request message transmissions of context pass through Handover to the source base station belonging to above-mentioned UE The UE context transfers that Request message returns to above-mentioned source base station give above-mentioned target BS, and notice target BS switches over； And after the Handover Request Acknowledge message of above-mentioned target BS is received, return to Handover Command message gives above-mentioned source base station, notifies above-mentioned source base station to switch over；Receive the eNB Status of above-mentioned source base station After Transfer message, MME Status Transfer message is sent to above-mentioned target BS, notice target BS prepares to receive Above-mentioned UE data；And after the Handover Notify message of above-mentioned target BS is received, by above-mentioned target BS to Above-mentioned UE sends data, and sends UE Context Release Command message to above-mentioned source base station, notifies above-mentioned source base Stand and discharge above-mentioned UE context；
Source base station, for above-mentioned UE context to be sent into above-mentioned MME by Handover Required message； After the Handover Command message for receiving above-mentioned MME, eNB Status Transfer message is sent to above-mentioned MME, notice MME sends data by above-mentioned target BS to above-mentioned UE；And after Context Release Command message is received, Discharge above-mentioned UE context.
The preferred embodiments of the present invention have shown and described in described above, but as previously described, it should be understood that the present invention is not Form disclosed herein is confined to, is not to be taken as the exclusion to other embodiment, and available for various other combinations, modification And environment, and can be carried out in the scope of the invention is set forth herein by the technology or knowledge of above-mentioned teaching or association area Change., then all should be in institute of the present invention and the change and change that those skilled in the art are carried out do not depart from the spirit and scope of the present invention In attached scope of the claims.

Claims (8)

  1. A kind of 1. across base station wireless resource control RRC connection reconstructions method, it is characterised in that
    After target BS receives the RRC Connection Re-establishment Request message that terminal UE reports, to The mobile management entity MME of core net asks the context of the UE；
    The MME passes to the request of the target BS source base station belonging to the UE, and the source base station is returned Context transfer gives the target BS；
    After the target BS receives the context of the UE, the UE is notified to carry out RRC connection reconstructions；
    After the UE completes RRC connection reconstructions, the target BS is that the UE distributes physical resource, and notifies the UE to carry out RRC resources are matched somebody with somebody again；
    Wherein, the target BS by UE Context Switch Request message to the MME ask UE up and down Text；
    The target BS is carried in the UE Context Switch Request message should for the base station S1 mouths of UE distribution With mark, MME S1 mouth application identities, UE cell-radio network user temporary mark and cell-of-origin Physical Cell Identifier PCI；
    The MME is by UE Context Switch Request Forward message by the UE Context Switch Request message transmissions give the source base station；
    After the source base station receives UE Context Switch Request Forward message, pass through Handover UE context is sent to the MME by Required message, informs that the MME needs to switch over.
  2. 2. according to the method for claim 1, it is characterised in that the target BS is upper to the MME requests UE's While hereafter, also start a timer, if the overtime context for not receiving the UE that the MME is returned, described in notice UE RRC connection reconstructions fail.
  3. 3. the method stated according to claim 1, it is characterised in that, will after the MME receives Handover Required message UE contexts therein give the target BS by Handover Request message transmissions, and notice target BS is cut Change.
  4. 4. according to the method for claim 3, it is characterised in that the target BS carries out RRC resources in notice UE and matched somebody with somebody again While, also return to Handover Request Acknowledge message and give the MME, notice MME switchings are completed；
    After the MME receives Handover Request Acknowledge message, return to Handover Command message and give The source base station, the source base station is notified to switch over；
    After the source base station receives Handover Command message, eNB Status Transfer message is sent to described MME, notice MME send data by the target BS to the UE；
    After the MME receives eNB Status Transfer message, MME Status are sent to the target BS Transfer message, notice target BS prepare to receive the data of the UE；Receive the Handover of the target BS After Notify message, data are sent to the UE by the target BS.
  5. 5. according to the method for claim 4, it is characterised in that the MME receives the Handover Notify of target BS After message, UE Context Release Command message also is sent to the source base station, notifies the source base station release institute State UE context.
  6. 6. according to the method for claim 1, it is characterised in that the RRC Connection Re-establishment The PCI of the cell-of-origin of the UE and the PCI of Target cell are carried in Request message, the MME passes through the UE cell-of-origins PCI, determine the source base station belonging to the UE.
  7. A kind of 7. across base station RRC connection reconstructions system, it is characterised in that including target BS, MME and source base station,
    The target BS, for disappearing receiving the RRC Connection Re-establishment Request that UE reports During breath, the context of the UE is asked to the MME by UE Context Switch Request message；And receiving After the context of the UE, the UE is notified to carry out RRC connection reconstructions；It is the UE after the UE completes RRC connection reconstructions Physical resource is distributed, and notifies the UE to carry out RRC resources and match somebody with somebody again；
    The MME, for by UE Context Switch Request Forward message by the target base station requests UE The UE Context Switch Request message transmissions of context are to the source base station belonging to the UE, and by the source base station The context transfer of return gives the target BS；
    The source base station, for the context of the UE to be sent into the MME by Handover Required message；
    Wherein, the target BS by UE Context Switch Request message to the MME ask UE up and down Text；
    The target BS is carried in the UE Context Switch Request message should for the base station S1 mouths of UE distribution With mark, MME S1 mouth application identities, UE cell-radio network user temporary mark and cell-of-origin Physical Cell Identifier PCI；
    The MME is by UE Context Switch Request Forward message by the UE Context Switch Request message transmissions give the source base station；
    After the source base station receives UE Context Switch Request Forward message, pass through Handover UE context is sent to the MME by Required message, informs that the MME needs to switch over.
  8. 8. system according to claim 7, it is characterised in that
    The target BS, for judging whether the MME returns in timing the context of the UE, and in time-out not When receiving the context for the UE that the MME is returned, the UERRC connection reconstructions are notified to fail；And returned to the MME Handover Request Acknowledge message, notice MME switchings are completed；Disappear receiving MME Status Transfer After breath, return to Handover Notify message and give the MME；
    The MME, for the UE context transfers that are returned to the source base station by Handover Request message to described Target BS, notice target BS switch over；Or receiving the Handover Request of the target BS After Acknowledge message, return to Handover Command message and give the source base station, notify that the source base station is cut Change；After the eNB Status Transfer message for receiving the source base station, MME Status are sent to the target BS Transfer message, notice target BS prepare to receive the data of the UE；And receiving the target BS After Handover Notify message, data are sent to the UE by the target BS, and UE is sent to the source base station Context Release Command message, the source base station is notified to discharge the context of the UE；
    The source base station, for after the Handover Command message of the MME is received, sending eNB Status Transfer message gives the MME, notice MME to send data to the UE by the target BS；And receiving After Context Release Command message, the context of the UE is discharged.
CN201110354431.4A 2011-11-10 2011-11-10 Across base station RRC connection reconstructions method and system Expired - Fee Related CN103108403B (en)

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KR20170128540A (en) * 2015-03-27 2017-11-22 후아웨이 테크놀러지 컴퍼니 리미티드 Data transmission method, access network device, and communication system
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