CN102143539A - Method and system for acquiring context of terminal - Google Patents
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- CN102143539A CN102143539A CN2010101110655A CN201010111065A CN102143539A CN 102143539 A CN102143539 A CN 102143539A CN 2010101110655 A CN2010101110655 A CN 2010101110655A CN 201010111065 A CN201010111065 A CN 201010111065A CN 102143539 A CN102143539 A CN 102143539A
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Abstract
The invention discloses a method and system for acquiring context of a terminal, which can be used for accurately acquiring the context of the terminal between eNBs (evolved Node B). The method comprises the following steps of: transmitting a request message for acquiring the context of the terminal to a source base station if a target base station to which a target cell, selected by the terminal during RRC (radio resource control) reconstruction, belongs does not have the context information of the terminal, wherein the request message comprises context matching information, a short media access control integrity verification value (short MAC-I) and evolved cell global identifier (ECGI) of an RRC reconstruction trial cell; matching the context of the terminal according to the context matching information in the request message for acquiring the context information of the terminal and verifying the context of the terminal through the short MAC-I by the source base station after the source base station receives the request message for acquiring the context information of the terminal; and if the verification is successful, judging that the context of the terminal exists and returning a response message to the target base station, wherein the response message carries the context information of the terminal.
Description
Technical field
The present invention relates to radio honeycomb communication system, more particularly, relate to contextual acquisition methods of a kind of terminal and system.
Background technology
LTE (Long Term Evolution, long evolving system) network is by E-UTRAN (EvolvedUniversal Terrestrial Radio Access, land, whole world wireless access) base station (Evolved NodeB, abbreviate eNB as) and evolution packet switching center (Evolved Packet Core, abbreviate EPC as) form the network flattening.Wherein E-UTRAN comprises the set of the eNB that is connected by the S1 interface with EPC, can connect by X2 interface between the eNB.S1, X2 are logic interfacing.An EPC can manage one or more eNB, and an eNB also can be controlled by a plurality of EPC, and an eNB can manage one or more sub-districts (cell).
In the LTE system, subscriber equipment (User Equipment abbreviates UE as) is terminal just, after the safe mode of Access Layer has activated, during in satisfying following condition one:
1) Radio Link Failure (Radio Link Failure abbreviates RLF as);
2) handoff failure (Handover Failure);
3) handoff failure from E-UTRA to different system (Mobility from E-UTRA Failure);
4) integrity checking failure (Integrity Check Failure);
5) RRC connects reconfiguration failure (RRC Connection Reconfiguration Failure),
UE can carry out RRC (Radio Resource Control, Radio Resource control) reconstruction is upright, UE is to obtain Target cell by the cell selecting program carrying out the RRC reconstruction immediately, and sends the upright request message of RRC reconstruction to the target BS at Target cell place.UE rebuilds in the upright request message at RRC, can have terminal iidentification (UE Identity), comprise: UE is at Radio Network Temporary Identifier (the Cell Radio Network Temporary Identifier of sub-district, abbreviate C-RNTI as), short MAC (Media Access Control, media interviews control) integrity verification value (short Medium AccessControl integrity protection, abbreviate shortMAC-I as) and cell physical address (PhysicalCell Identity abbreviates PCI as).Wherein, under the scene of handoff failure, C-RNTI distributes in the cell-of-origin that UE switches, and other scenes are next to be to distribute in the sub-district of triggering the RRC reconstruction; Under the scene of handoff failure, PCI is meant the physical address of the cell-of-origin that switches, the next physical address that is meant the sub-district of triggering the RRC reconstruction of other scenes; The calculating of shortMAC-I is to adopt (scene of handoff failure) of the cell-of-origin switch or at the KRRCint key (key that RR signaling integrality is calculated) and the protection algorithm integrallty that trigger the sub-district that RRC rebuilds; input when calculating shortMAC-I comprises: the Cell Global Identity of PCI, C-RNTI and evolution (Evolved CellGlobal Identifier abbreviates ECGI as).UE is exactly shortMAC-I with the output that these three parameter input algorithms obtain.The shortMAC-I of base station side also is same algorithm, or obtains (in the scene of handoff failure) by the hand off signaling flow process.The base station is after the RRC that receives UE rebuilds upright message, and whether the shortMAC-I that calculates or preserve with the base station by the shortMAC-I in the message relatively the consistent UE that verifies, if unanimity then is proved to be successful.Wherein, PCI, C-RNTI rebuild in the upright request message at above-mentioned RRC and carry, and ECGI is the ECGI of UE selected Target cell when RRC rebuilds.
When in handoff procedure, switching failure, overtime if source base station does not receive that UE release message and switching timer do not have, then can keep user's contextual information; And if target BS wait for UE insert successfully at random before or timer do not have overtimely, then can keep user's contextual information.Rebuild under the upright situation at other RRC, RRC rebuilds upright target eNB (eNB under the upright Target cell of asking to select of RRC reconstruction) and source eNB (eNB under the Serving cell of UE before RRC rebuilds the request of standing) is not same eNB if UE carries out, and there is not the contextual information (UEcontext) of this UE in target eNB, and then RRC rebuilds the upright meeting of trial failure.
In the prior art, rebuilding upright success rate in order to improve RRC, is to improve the upright success rate of RRC reconstruction by target eNB to the method that source eNB obtains UE context.Existing a kind of method is to obtain with responding process by the UE context request of obtaining at present, and promptly target eNB sends UE context to source eNB and obtains request message, wherein comprises UE at the C-RNTI of cell-of-origin and the PCI of cell-of-origin.If there is the context of this UE in source eNB, then return UE context and obtain response message to target eNB, wherein comprise the context information content of UE; If there is not the context of this UE in source eNB, then returns UE context and obtain failed message to target eNB.
There are the following problems for said method: obtain in the request message at UE context and only identify UE with C-RNTI and PCI, may cause confusion, because C-RNTI distributes in a sub-district, if source eNB has two sub-districts to distribute this C-RNTI value simultaneously, and the PCI of two sub-districts of source eNB is identical, and then which sub-district can't differentiate this UE be to source eNB actually.Equally, obtaining response message and UE context for UEcontext, to obtain failed message also be like this, target eNB is obscured at PCI and may have been sent UE context to the multiple source base station under the situation and obtain request message, needs also to know that obtaining what comprise in the response message is the context of which UE or which UE obtains failed message be for.
The problems referred to above may cause RRC to rebuild upright procedure failure, and then influence network performance.
Summary of the invention
The technical problem to be solved in the present invention provides contextual acquisition methods of a kind of terminal and system, can realize accurately obtaining between eNB UE context information, improves RRC and rebuilds upright success rate, thereby improve network performance.
In order to address the above problem, the invention provides the contextual acquisition methods of a kind of terminal, described method comprises:
Terminal is carried out Radio Resource control (RRC) if rebuild the contextual information that the affiliated target BS of selecting of Target cell does not have described terminal immediately, then send the request message that obtains the terminal contextual information to source base station, the media interviews control integrity verification value (shortMAC-I) and the RRC that comprise context match information, weak point in this request message rebuild the Cell Global Identity (ECGI) of attempting the sub-district;
After described source base station is received the described request message that obtains the terminal contextual information, mate the context of described terminal according to described context match information wherein, and verify the context of described terminal by described shortMAC-I, if be proved to be successful, and the context of described terminal exists, then return response message, carry the contextual information of described terminal in this response message to described target BS.
Further, if the context of described terminal does not exist or verify the context failure of described terminal by described shortMAC-I, then described source base station returns failed message to described target BS, carry failure cause in this failed message, described failure cause is that context does not exist or the terminal authentication failed.
Further, comprise described context match information in the described response message at least, also comprise described shortMAC-I and/or described RRC and rebuild the ECGI that attempts the sub-district;
After described target BS is received described response message, mate the context of described terminal according to described context match information wherein, and the described shortMAC-I by wherein and/or described RRC rebuild the context that the ECGI that attempts the sub-district verifies described terminal, if be proved to be successful, then the contextual information according to the described terminal in the described response message carries out the upright flow process of RRC reconstruction.
Further, comprise described context match information in the described failed message at least, perhaps also comprise described shortMAC-I and/or described RRC and rebuild the ECGI that attempts the sub-district;
After described target BS is received described failed message, mate the context of described terminal according to described context match information wherein, and the described shortMAC-I by wherein and/or described RRC rebuild the context that the ECGI that attempts the sub-district verifies described terminal, if be proved to be successful, then whether initiate to obtain the contextual flow process of described terminal again according to described failure cause decision.
Further, described context match information comprises that described terminal is at the Radio Network Temporary Identifier (C-RNTI) of cell-of-origin and the physical address (PCI) of described cell-of-origin.
Further, described terminal is carried out the RRC reconstruction immediately, sends RRC to described target BS and rebuilds upright request message, and described RRC rebuilds the PCI information that comprises the cell-of-origin in the request message of standing;
Described target BS arrives described source base station according to the PCI information matches that the RRC that receives rebuilds in the upright request message, if match the multiple source base station, then described target BS sends the described request message that obtains the terminal contextual information to the multiple source base station that matches.
Further, also comprise the specific identifier that described target BS is described terminal distribution in the described request message;
After described source base station is received the described request message that obtains the terminal contextual information, at least comprise the specific identifier that described target BS distributes in response message that returns or failed message, perhaps also comprising described source base station is the corresponding specific identifier of described terminal distribution;
After target BS is received described response message or failed message, discern described terminal according to the specific identifier that wherein described target BS distributes.
Further, described target BS is that the specific identifier of described terminal distribution and specific identifier that described source base station is described terminal distribution comprise X2 interface application protocol identification or S1 interface application protocol identification or things number.
The present invention also provides another kind of terminal contextual acquisition methods, and described method comprises:
If carrying out RRC, terminal rebuilds the contextual information that the affiliated target BS of immediately selecting of Target cell does not have described terminal, then send the request message that obtains the terminal contextual information, comprise context match information, shortMAC-I and RRC in this request message and rebuild the ECGI that attempts the sub-district to source base station;
After described source base station is received the described request message that obtains the terminal contextual information, mate the context of described terminal according to described context match information wherein, and verify the context of described terminal by described shortMAC-I, if be proved to be successful, and the context of described terminal exists, then when allowing described terminal to switch or cutting Target cell, return response message, carry the contextual information of described terminal in this response message to described target BS.
Further, if the context that the context of described terminal does not exist, shortMAC-I verifies described terminal failure, cell-of-origin are forbidden switching or Target cell is that described terminal is forbidden the sub-district cut to Target cell, then described source base station returns failed message to described target BS, carry failure cause in this failed message, described failure cause is that context does not exist, the terminal authentication failed, forbid switching or forbidding incision.
The present invention also provides a kind of terminal the contextual system that obtains, and the RRC that is applied to terminal rebuilds upright, and described system comprises that source base station and terminal carry out RRC and rebuild the target BS of immediately selecting, wherein:
Described target BS is used for, receive that the RRC that terminal sends rebuilds when standing request, if there is not the contextual information of described terminal, then the PCI information matches of rebuilding in the upright request message according to described RRC arrives described source base station, and send the request message that obtains the terminal contextual information to described source base station, comprise the context match information in this request message, shortMAC-I and RRC rebuild the ECGI that attempts the sub-district;
Described source base station is used for, after receiving the described request message that obtains the terminal contextual information, mate the context of described terminal according to described context match information wherein, and verify the context of described terminal by described shortMAC-I, if be proved to be successful, the context of described terminal exists, then return response message, carry the contextual information of described terminal in this response message to described target BS; Do not exist if verify the context failure of described terminal or the context of described terminal, then return failed message to described target BS, carry failure cause in this failed message, described failure cause is that context does not exist or the terminal authentication failed.
Further, described source base station also is used for, and comprises described context match information in described response message that returns or described failed message, and the ECGI of described shortMAC-I and/or described RRC reconstruction trial sub-district;
Described target BS also is used for, after receiving described response message, mate the context of described terminal according to described context match information wherein, and the described shortMAC-I by wherein and/or described RRC rebuild the context that the ECGI that attempts the sub-district verifies described terminal, if be proved to be successful, then the contextual information according to the described terminal in the described response message carries out the upright flow process of RRC reconstruction; After receiving described failed message, mate the context of described terminal according to described context match information wherein, and the described shortMAC-I by wherein and/or described RRC rebuild the context that the ECGI that attempts the sub-district verifies described terminal, if be proved to be successful, then whether initiate to obtain the contextual flow process of described terminal again according to described failure cause decision.
Further, described target BS also is used for, for the specific identifier of described terminal distribution and be included in the described request message that obtains the terminal contextual information; And, receive response message or failed message after, discern described terminal according to the specific identifier that wherein described target BS distributes;
Described source base station also is used for, after receiving the described request message that obtains the terminal contextual information, at least comprise the specific identifier that described target BS distributes in response message that returns or failed message, perhaps also comprising the specific identifier that distributes according to described target BS is the corresponding specific identifier of described terminal distribution.
The present invention also provides another kind of terminal the contextual system that obtains, and the RRC that is applied to terminal rebuilds upright, and described system comprises that source base station and terminal carry out RRC and rebuild the target BS of immediately selecting, wherein:
Described target BS is used for, receive that the RRC that terminal sends rebuilds when standing request, if there is not the contextual information of described terminal, then the PCI information matches of rebuilding in the upright request message according to described RRC arrives described source base station, and send the request message that obtains the terminal contextual information to described source base station, comprise the context match information in this request message, shortMAC-I and RRC rebuild the ECGI that attempts the sub-district;
Described source base station is used for, after receiving the described request message that obtains the terminal contextual information, mate the context of described terminal according to described context match information wherein, and verify the context of described terminal by described shortMAC-I, if be proved to be successful, the context of described terminal exists, and allow described terminal to switch or the incision Target cell, then return response message, carry the contextual information of described terminal in this response message to described target BS; If verify that the context of the context failure of described terminal, described terminal does not exist, described cell-of-origin forbids switching or Target cell is that described terminal is forbidden the sub-district cut to Target cell, then return failed message to described target BS, carry failure cause in this failed message, described failure cause is that context does not exist, the terminal authentication failed, forbid switching or forbidding incision.
Further, described source base station also is used for, and comprises described context match information and described shortMAC-I and/or described ECGI in described response message that returns or described failed message;
Described target BS also is used for, after receiving described response message, mate the context of described terminal according to described context match information wherein, and the described shortMAC-I by wherein and/or described RRC rebuild the context that the ECGI that attempts the sub-district verifies described terminal, if be proved to be successful, then the contextual information according to the described terminal in the described response message carries out the upright flow process of RRC reconstruction; After receiving described failed message, mate the context of described terminal according to described context match information wherein, and the described shortMAC-I by wherein and/or described RRC rebuild the context that the ECGI that attempts the sub-district verifies described terminal, if be proved to be successful, then whether initiate to obtain the contextual flow process of described terminal again according to described failure cause decision.
Further, described target BS also is used for, for the specific identifier of described terminal distribution and be included in the described request message that obtains the terminal contextual information; And, receive response message or failed message after, discern described terminal according to the specific identifier that wherein described target BS distributes;
Described source base station also is used for, after receiving the described request message that obtains the terminal contextual information, at least comprise the specific identifier that described target BS distributes in response message that returns or failed message, perhaps also comprising the specific identifier that distributes according to described target BS is the corresponding specific identifier of described terminal distribution.
Adopt the present invention program, make and to obtain UE context accurately between the base station, rebuild upright success rate, improve wireless network performance, better experience for the user thereby improved RRC.
Description of drawings
Fig. 1 obtains the schematic flow sheet of the contextual information success of terminal for the target BS of the embodiment of the invention to source base station;
Fig. 2 obtains the schematic flow sheet of the contextual information failure of terminal to source base station for the target BS of the embodiment of the invention.
Embodiment
Core concept of the present invention is, adopts the unique identification of terminal in the acquisition process of UE context, for example uses shortMAC-I that the UE contextual information is verified, and/or utilizes the base station to mate the UE context for the specific identifier that UE distributes, or the like.Like this, can accurately obtain UE context between target BS and the source base station, rebuild upright success rate thereby can improve RRC.
Based on above-mentioned thought, the present invention adopts following technical proposals:
Terminal is carried out Radio Resource control (RRC) if rebuild the contextual information that the affiliated target BS of selecting of Target cell does not have described terminal immediately, then send the request message that obtains UE context information, comprise context match information, shortMAC-I and RRC in this request message and rebuild the ECGI that attempts the sub-district to source base station;
After source base station is received above-mentioned request message, mate UEcontext according to context match information wherein, and verify UE context by shortMAC-I, if be proved to be successful, and this UE context exists, and then returns response message to target BS, carries UE context information.
Wherein, if source base station according to the shortMAC-I authentication failed, perhaps UE context does not exist, and then returns failed message to target BS, carries failure cause.
Further, at least also comprise the context match information in response message that source base station returns or the failed message, can also comprise described shortMAC-I and/or described ECGI;
After target BS is received the described response message or failed message that source base station returns, mate UE context according to context match information wherein, and verify UEcontext by shortMAC-I and/or ECGI, after being proved to be successful, if response message, then the context according to described terminal carries out the upright flow process of RRC reconstruction; If failed message, whether decision initiates UE context acquisition process again according to failure cause.
Wherein, described context match information comprises that UE is at the C-RNTI of cell-of-origin, the PCI of cell-of-origin.
Described UE context information is meant the contextual information in the place Serving cell of UE before triggering RRC reconstruction is upright.
Further, UE is carrying out the RRC reconstruction immediately, sends RRC to described target BS and rebuilds upright request message, and this RRC rebuilds the PCI information that comprises the cell-of-origin in the request message of standing;
If target BS arrives the multiple source base station by the PCI information matches that described RRC rebuilds in the upright request message, then send the request message that obtains UE context information to a plurality of base stations that match.
Further, can also comprise target BS in the request message that obtains UE context information that target BS sends is the specific identifier that UE distributes;
Source base station returns response message or failed message to target BS after receiving the request message of the above-mentioned UE of obtaining context information, comprises the specific identifier of the UE of target BS distribution, perhaps also comprises the specific identifier that source base station distributes for this UE;
After target BS was received above-mentioned response message or failed message, the specific identifier of the UE that distributes according to wherein target BS was discerned the UE context.
Further, the specific identifier of described UE can be X2AP id (X2 Application ProtocolIdentifier, the X2 interface application protocol identification) and/or S1AP id (S1 Application ProtocolIdentifier, the S1 interface application protocol identification) and/or transaction number (Transaction Identifier abbreviates TI as).
Wherein, described cell-of-origin is meant that UE carries out RRC and rebuilds upright Serving cell before, Target cell is meant in the upright program of RRC reconstruction selects to carry out the sub-district that RRC rebuilds upright trial, and the base station under the cell-of-origin is a source base station, and the base station under the Target cell is a target BS.
Further, the failure cause in the above-mentioned failed message comprises: authentication failed, UE Context do not exist.
In addition, alternatively, source base station can also be arranged to: even be proved to be successful, and there is UE Context, if but the cell-of-origin to Target cell forbid switching or Target cell be described terminal forbid cutting the sub-district time, then will return failed message, at this moment, to be the cell-of-origin forbid switching or Target cell is that described terminal is forbidden sub-district of cutting etc. to Target cell the failure cause that carries in the failed message.
To be example with the LTE system below, and reach specific embodiment in conjunction with the accompanying drawings the enforcement of technical solution of the present invention is described in further detail.
In the LTE system, UE in the cell-a of eNB-a, trigger RRC rebuild upright after, carry out cell selecting, UE selects the cell-b among the eNB-b to carry out RRC as Target cell to rebuild upright.Then UE sends RRC and rebuilds upright request message to eNB-b, and contain UE in this message and rebuild the ECGI that attempts sub-district cell-b at PCI, the RRC of C-RNTI, the cell-of-origin cell-a of cell-of-origin cell-a, and shortMAC-I.ENB-b receives that this RRC rebuilds upright request message, if there is not the context information of this UE among the eNB-b, then eNB-b can initiate UE context acquisition process.
Embodiment one
Adopt PCI, C-RNTI and shortMAC-I to come unique identification UE in the present embodiment, referring to Fig. 1 and Fig. 2, the target BS of receiving the upright request message of RRC reconstruction specifically comprises the steps: when obtaining UE Context information
Step 101, eNB-b sends message 1 to eNB-a, acquisition request UE context, comprise UE in the message 1 and rebuild the Cell Global Identity ECGI that attempts sub-district cell-b at PCI, shortMAC-I and the RRC of C-RNTI, the cell-of-origin cell-a of cell-of-origin cell-a, the indication information etc. that can also comprise alternatively, acquisition request UE Context;
In this step, eNB-b rebuilds base station eNB-a that the PCI information of standing in the message is determined acquisition request UE context according to the RRC that receives, if eNB-b has arrived a plurality of base stations according to the PCI information matches, then sends message 1 to all base stations that match;
Step 102, eNB-a receives the message 1 of acquisition request UE context, mate UE context according to wherein PCI and C-RNTI, if in the message 1 shortMAC-I is arranged, then verify this UE context with shortMAC-I, promptly relatively in shortMAC-I value in the message 1 and the base station corresponding shortMAC-I value whether consistent, if two are worth unanimity, then represent to be proved to be successful.If be proved to be successful, and there is corresponding UE Context information among the eNB-a, then eNB-a sends message 2 to eNB-b and returns UE Context information, at least comprise UE Context information, UE in the message 2 at the C-RNTI of cell-of-origin cell-a, the PCI of cell-of-origin cell-a, also comprise the Cell Global Identity ECGI of shortMAC-I and/or RRC reconstruction trial sub-district cell-b etc.; If authentication failed, perhaps checking is consistent, but UE Context information does not exist, then eNB-a transmission message 3 to eNB-b is returned UE Context and is obtained failed message, can comprise UE in the message 3 at the C-RNTI of cell-of-origin cell-a, the PCI of cell-of-origin cell-a, the Cell Global Identity ECGI that also comprises shortMAC-I (in the message 1) and/or cell-b, and failure cause, this failure cause is that UE Context does not exist or the terminal authentication failed;
In addition, concrete application strategy according to the base station, if cell-a forbids to the cell-b sub-district switching, to rebuild upright sub-district cell-b be that UE forbids the situation that the sub-district cut etc. does not allow RRC to rebuild to RRC, eNB-a will send message 3 to eNB-b and return UE Context and obtain failed message, even the shortMAC-I value is consistent, and have UE Context information, at this moment, failure cause is for forbidding switching or forbidding incision etc.
Step 103, if eNB-b receives message 2, then according to wherein PCI, C-RNTI, and ECGI and/or shortMAC-I determine UE Context, promptly carries out UE Context checking, if authentication failed, then abandon this message 2, if be proved to be successful, then eNB-b carries out RRC and rebuilds upright flow process according to the UE context information content that obtains in the message 2; If eNB-b receives message 3, according to PCI, C-RNTI wherein, and ECGI and/or shortMAC-I determine UE Context, promptly carry out UE Context checking, if be proved to be successful then determine whether initiating again UE context acquisition process according to wherein failure cause, if authentication failed then abandons message 3.
Embodiment two
Referring to Fig. 1 and Fig. 2, the UE context acquisition process of present embodiment specifically comprises the steps:
Step 201, eNB-b sends message 1 to eNB-a, acquisition request UE context comprises UE in the message 1 and rebuild the ECGI that attempts sub-district cell-b at PCI, shortMAC-I and the RRC of C-RNTI, the cell-of-origin cell-a of cell-of-origin cell-a, and eNB-b is the special sign I that UE distributes;
Wherein, eNB-b is that the special sign I that UE distributes is a sign unique in eNB-b, and eNB-b receives the message that contains this sign, can arrive specific UE by unique index.
Described special sign I can be X2AP id (X2 application protocol identifier, the X2 interface application protocol identification) and or S1AP id (S1 application protocol identifier, S1 interface application protocol identification) and or transaction number (Transaction identifier).Wherein, message 1 is transmitted by X2, the special sign I of UE can be X2AP id and or transaction number; Message 1 is transmitted by the S1 mouth, and the special sign I of UE can be S1AP id and or transaction number.
The indication information etc. that can also comprise in addition, acquisition request UE Context in the message 1;
Step 202, eNB-a receives the message 1 of acquisition request UE context, mate UE context according to wherein PCI and C-RNTI, if in the message 1 shortMAC-I is arranged, then verify this UE with shortMAC-I, eNB-a can also distribute the special sign II of corresponding with it UE according to the special sign I of UE, if checking is consistent, and there is corresponding UE Context information in eNB-a, then eNB-a sends message 2 to eNB-b and returns UE Context information, contains the special sign I of UE Context information, UE and/or the special sign II of UE in the message 2; If checking is consistent, but UE Context information does not exist, cell-a forbids to the cell-b sub-district switching or RRC to rebuild upright sub-district cell-b be that UE forbids the sub-district cut, perhaps authentication failed, then eNB-a transmission message 3 to eNB-b is returned UEContext and is obtained failure response, the special sign I that comprises failure cause and UE in the message 3, can also comprise the special sign II of UE, this failure cause can be that UE Context does not exist, the terminal authentication failed, cell-a forbids to the cell-b sub-district switching, it is that UE forbids the sub-district cut etc. that RRC rebuilds upright sub-district cell-b;
Wherein, eNB-b sends the message of the special sign I that contains the UE distribution to eNB-a, eNB-a can distribute one at the inner unique special sign II of eNB-a for this UE, the special sign I and the special sign II that contain UE in the relevant message of follow-up this UE between eNB-b and eNB-a, receive the eNB-b of message and eNB-a just can according to the special sign I of UE with or identify the unique definite specific UE of II specially.
If message 2 is transmitted by X2, the special sign II of UE can be X2AP id and/or transaction number; If message 2 is transmitted by the S1 mouth, the special sign II of UE can be S1AP id and/or transaction number.
If message 3 is transmitted by X2, the special sign II of UE can be X2AP id and/or transaction number; Message 3 is transmitted by the S1 mouth, and the special sign II of UE can be S1AP id and/or transaction number.
Step 203 if eNB-b receives message 2, then identifies the context of UE according to the special sign I of UE wherein (or together with special sign II of the UE), and according to the UE context information that obtains in the message 2, carries out RRC and rebuild upright flow process; If eNB-b receives message 3, then the special sign I of the special sign II of basis UE wherein and/or UE identifies the Context of UE, and determines whether initiating UE context acquisition process according to failure cause wherein again.
Embodiment three
Referring to Fig. 1 and Fig. 2, the UE context acquisition process of present embodiment specifically comprises the steps:
Step 301, eNB-b sends message 1 to eNB-a, acquisition request UE context comprises UE in the message 1 and rebuild the ECGI that attempts sub-district cell-b at PCI, shortMAC-I and the RRC of C-RNTI, the cell-of-origin cell-a of cell-of-origin cell-a, and eNB-b is the special sign I that UE distributes;
The special sign I of described UE can be X2AP id (X2 application protocolidentifier, the X2 interface application protocol identification) and or S1AP id (S1 application protocolidentifier, S1 interface application protocol identification) and or transaction number (Transaction identifier).Wherein, message 1 is transmitted by X2, the special sign I of UE can be X2AP id and or transaction number; Message 1 is transmitted by the S1 mouth, and the special sign I of UE can be S1AP id and or transaction number.
The indication information etc. that can also comprise in addition, acquisition request UE Context in the message 1;
Step 302, eNB-a receives the message 1 of acquisition request UE context, mate UE context according to wherein PCI and C-RNTI, and verify UEcontext according to the shortMAC-I in the message 1, eNB-a can also distribute the special sign II of corresponding with it UE according to the special sign I of UE, if checking is consistent, and there is UE Context information, then eNB-a sends message 2 to eNB-b and returns UE Context information, contain UE Context information in the message 2, UE is at the C-RNTI of cell-of-origin cell-a, the PCI of cell-of-origin cell-a, the ECGI that can also comprise alternatively, shortMAC-I and/or cell-b in the message 2, the special sign I of UE and/or the special sign II of UE; If checking is consistent, but UE Context information does not exist or Cell-a forbids to the Cell-b sub-district switching or RRC to rebuild upright sub-district cell-b be that UE forbids the sub-district cut, perhaps authentication failed, then eNB-a transmission message 3 to eNB-b is returned UE Context and is obtained failure response, contain failure cause, UE in the message 3 at the C-RNTI of cell-of-origin cell-a, the PCI of cell-of-origin cell-a, the special sign I of the ECGI of shortMAC-I and/or cell-b, UE, the special sign II etc. that can also comprise alternatively, UE in the message 2;
Failure cause wherein can be that UE Context does not exist, terminal authentication failed, cell-a forbid to the cell-b sub-district switching, to rebuild upright sub-district cell-b be that UE forbids the sub-district cut etc. to RRC.
Wherein, if message 2 is transmitted by X2, the special sign II of UE can be X2AP id and/or transaction number; If message 2 is transmitted by the S1 mouth, the special sign II of UE can be S1APid and/or transaction number.
If message 3 is transmitted by X2, the special sign II of UE can be X2AP id and/or transaction number; Message 3 is transmitted by the S1 mouth, and the special sign II of UE can be S1AP id and/or transaction number.
Step 303, if eNB-b receives message 2, then determine UE Context according to wherein PCI, C-RNTI and shortMAC-I and/or ECGI, promptly carry out UE Context checking, if authentication failed then abandons this message 2, if be proved to be successful, then identify the context of UE, and, carry out RRC and rebuild upright flow process according to the UE context information that obtains in the message 2 according to the special sign I of UE wherein (or together with special sign II of the UE); If eNB-b receives message 3, then basis PCI, C-RNTI and shortMAC-I wherein determines UE Context, promptly carry out UE Context checking, if authentication failed, then abandon this message 2, if be proved to be successful, then the special sign I of the special sign II of basis UE wherein and/or UE identifies the Context of UE, and determines whether initiating UE context acquisition process according to failure cause wherein again.
Wherein, the message 1,2 and 3 in the foregoing description can be respectively that independently the terminal context obtains that request message, terminal context obtain response message, the terminal context obtains failed message, perhaps other X2 mouth or S1 mouth message.
In addition, also provide a kind of terminal the contextual system (not shown) that obtains in the embodiment of the invention, the RRC that is used for terminal rebuilds upright, and this system comprises that source base station and terminal carry out RRC and rebuild the target BS of immediately selecting, wherein:
Described target BS is used for, receive that the RRC that terminal sends rebuilds when standing request, if there is not the contextual information of described terminal, then the PCI information matches of rebuilding in the upright request message according to described RRC arrives described source base station, and send the request message that obtains the terminal contextual information to described source base station, comprise the context match information in this request message, shortMAC-I and RRC rebuild the ECGI that attempts the sub-district;
Described source base station is used for, after receiving the described request message that obtains the terminal contextual information, mate the context of described terminal according to described context match information wherein, and verify the context of described terminal by described shortMAC-I, if be proved to be successful, the context of described terminal exists, then return response message, carry the contextual information of described terminal in this response message to described target BS; Do not exist if verify the context failure of described terminal or the context of described terminal, then return failed message to described target BS, carry failure cause in this failed message, described failure cause is that context does not exist or the terminal authentication failed.
Further, described source base station also is used for, and comprises described context match information in described response message that returns or described failed message, and the ECGI of described shortMAC-I and/or described RRC reconstruction trial sub-district;
Described target BS also is used for, after receiving described response message, mate the context of described terminal according to described context match information wherein, and the described shortMAC-I by wherein and/or described RRC rebuild the context that the ECGI that attempts the sub-district verifies described terminal, if be proved to be successful, then the contextual information according to the described terminal in the described response message carries out the upright flow process of RRC reconstruction; After receiving described failed message, mate the context of described terminal according to described context match information wherein, and the described shortMAC-I by wherein and/or described RRC rebuild the context that the ECGI that attempts the sub-district verifies described terminal, if be proved to be successful, then whether initiate to obtain the contextual flow process of described terminal again according to described failure cause decision.
Further, described target BS also is used for, for the specific identifier of described terminal distribution and be included in the described request message that obtains the terminal contextual information; And, receive response message or failed message after, discern described terminal according to the specific identifier that wherein described target BS distributes;
Described source base station also is used for, after receiving the described request message that obtains the terminal contextual information, at least comprise the specific identifier that described target BS distributes in response message that returns or failed message, perhaps also comprising the specific identifier that distributes according to described target BS is the corresponding specific identifier of described terminal distribution.
In addition, also provide another kind of terminal the contextual system that obtains in the embodiment of the invention, the RRC that is applied to terminal rebuilds upright, and this system comprises that source base station and terminal carry out RRC and rebuild the target BS of immediately selecting, wherein:
Described target BS is used for, receive that the RRC that terminal sends rebuilds when standing request, if there is not the contextual information of described terminal, then the PCI information matches of rebuilding in the upright request message according to described RRC arrives described source base station, and send the request message that obtains the terminal contextual information to described source base station, comprise the context match information in this request message, shortMAC-I and RRC rebuild the ECGI that attempts the sub-district;
Described source base station is used for, after receiving the described request message that obtains the terminal contextual information, mate the context of described terminal according to described context match information wherein, and verify the context of described terminal by described shortMAC-I, if be proved to be successful, the context of described terminal exists, and allow described terminal to switch or the incision Target cell, then return response message, carry the contextual information of described terminal in this response message to described target BS; If verify that the context of the context failure of described terminal, described terminal does not exist, described cell-of-origin forbids switching or Target cell is that described terminal is forbidden the sub-district cut to Target cell, then return failed message to described target BS, carry failure cause in this failed message, described failure cause is that context does not exist, the terminal authentication failed, forbid switching or forbidding incision.
Further, described source base station also is used for, and comprises described context match information and described shortMAC-I and/or described ECGI in described response message that returns or described failed message;
Described target BS also is used for, after receiving described response message, mate the context of described terminal according to described context match information wherein, and the described shortMAC-I by wherein and/or described RRC rebuild the context that the ECGI that attempts the sub-district verifies described terminal, if be proved to be successful, then the contextual information according to the described terminal in the described response message carries out the upright flow process of RRC reconstruction; After receiving described failed message, mate the context of described terminal according to described context match information wherein, and the described shortMAC-I by wherein and/or described RRC rebuild the context that the ECGI that attempts the sub-district verifies described terminal, if be proved to be successful, then whether initiate to obtain the contextual flow process of described terminal again according to described failure cause decision.
Further, described target BS also is used for, for the specific identifier of described terminal distribution and be included in the described request message that obtains the terminal contextual information; And, receive response message or failed message after, discern described terminal according to the specific identifier that wherein described target BS distributes;
Described source base station also is used for, after receiving the described request message that obtains the terminal contextual information, at least comprise the specific identifier that described target BS distributes in response message that returns or failed message, perhaps also comprising the specific identifier that distributes according to described target BS is the corresponding specific identifier of described terminal distribution.
Should be appreciated that the above only is the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (16)
1. contextual acquisition methods of terminal is characterized in that described method comprises:
Terminal is carried out Radio Resource control (RRC) if rebuild the contextual information that the affiliated target BS of selecting of Target cell does not have described terminal immediately, then send the request message that obtains the terminal contextual information to source base station, the media interviews control integrity verification value (shortMAC-I) and the RRC that comprise context match information, weak point in this request message rebuild the Cell Global Identity (ECGI) of attempting the sub-district;
After described source base station is received the described request message that obtains the terminal contextual information, mate the context of described terminal according to described context match information wherein, and verify the context of described terminal by described shortMAC-I, if be proved to be successful, and the context of described terminal exists, then return response message, carry the contextual information of described terminal in this response message to described target BS.
2. the method for claim 1 is characterized in that,
If the context of described terminal does not exist or verify the context failure of described terminal by described shortMAC-I, then described source base station returns failed message to described target BS, carry failure cause in this failed message, described failure cause is that context does not exist or the terminal authentication failed.
3. the method for claim 1 is characterized in that,
At least comprise described context match information in the described response message, also comprise described shortMAC-I and/or described RRC and rebuild the ECGI that attempts the sub-district;
After described target BS is received described response message, mate the context of described terminal according to described context match information wherein, and the described shortMAC-I by wherein and/or described RRC rebuild the context that the ECGI that attempts the sub-district verifies described terminal, if be proved to be successful, then the contextual information according to the described terminal in the described response message carries out the upright flow process of RRC reconstruction.
4. method as claimed in claim 2 is characterized in that,
At least comprise described context match information in the described failed message, perhaps also comprise described shortMAC-I and/or described RRC and rebuild the ECGI that attempts the sub-district;
After described target BS is received described failed message, mate the context of described terminal according to described context match information wherein, and the described shortMAC-I by wherein and/or described RRC rebuild the context that the ECGI that attempts the sub-district verifies described terminal, if be proved to be successful, then whether initiate to obtain the contextual flow process of described terminal again according to described failure cause decision.
5. as claim 1,2,3 or 4 described methods, it is characterized in that,
Described context match information comprises that described terminal is at the Radio Network Temporary Identifier (C-RNTI) of cell-of-origin and the physical address (PCI) of described cell-of-origin.
6. as claim 1,2,3 or 4 described methods, it is characterized in that,
Described terminal is carried out the RRC reconstruction immediately, sends RRC to described target BS and rebuilds upright request message, and described RRC rebuilds the PCI information that comprises the cell-of-origin in the request message of standing;
Described target BS arrives described source base station according to the PCI information matches that the RRC that receives rebuilds in the upright request message, if match the multiple source base station, then described target BS sends the described request message that obtains the terminal contextual information to the multiple source base station that matches.
7. as claim 1,2,3 or 4 described methods, it is characterized in that,
Also comprise the specific identifier that described target BS is described terminal distribution in the described request message;
After described source base station is received the described request message that obtains the terminal contextual information, at least comprise the specific identifier that described target BS distributes in response message that returns or failed message, perhaps also comprising described source base station is the corresponding specific identifier of described terminal distribution;
After target BS is received described response message or failed message, discern described terminal according to the specific identifier that wherein described target BS distributes.
8. method as claimed in claim 7 is characterized in that,
Described target BS is that the specific identifier of described terminal distribution and specific identifier that described source base station is described terminal distribution comprise X2 interface application protocol identification or S1 interface application protocol identification or things number.
9. contextual acquisition methods of terminal is characterized in that described method comprises:
If carrying out RRC, terminal rebuilds the contextual information that the affiliated target BS of immediately selecting of Target cell does not have described terminal, then send the request message that obtains the terminal contextual information, comprise context match information, shortMAC-I and RRC in this request message and rebuild the ECGI that attempts the sub-district to source base station;
After described source base station is received the described request message that obtains the terminal contextual information, mate the context of described terminal according to described context match information wherein, and verify the context of described terminal by described shortMAC-I, if be proved to be successful, and the context of described terminal exists, then when allowing described terminal to switch or cutting Target cell, return response message, carry the contextual information of described terminal in this response message to described target BS.
10. method as claimed in claim 9 is characterized in that,
If the context that the context of described terminal does not exist, shortMAC-I verifies described terminal failure, cell-of-origin are forbidden switching or Target cell is that described terminal is forbidden the sub-district cut to Target cell, then described source base station returns failed message to described target BS, carry failure cause in this failed message, described failure cause is that context does not exist, the terminal authentication failed, forbid switching or forbidding incision.
11. the contextual system that obtains of terminal, the RRC that is applied to terminal rebuilds upright, it is characterized in that, described system comprises that source base station and terminal carry out RRC and rebuild the target BS of immediately selecting, wherein:
Described target BS is used for, receive that the RRC that terminal sends rebuilds when standing request, if there is not the contextual information of described terminal, then the PCI information matches of rebuilding in the upright request message according to described RRC arrives described source base station, and send the request message that obtains the terminal contextual information to described source base station, comprise the context match information in this request message, shortMAC-I and RRC rebuild the ECGI that attempts the sub-district;
Described source base station is used for, after receiving the described request message that obtains the terminal contextual information, mate the context of described terminal according to described context match information wherein, and verify the context of described terminal by described shortMAC-I, if be proved to be successful, the context of described terminal exists, then return response message, carry the contextual information of described terminal in this response message to described target BS; Do not exist if verify the context failure of described terminal or the context of described terminal, then return failed message to described target BS, carry failure cause in this failed message, described failure cause is that context does not exist or the terminal authentication failed.
12. system as claimed in claim 11 is characterized in that,
Described source base station also is used for, and comprises described context match information in described response message that returns or described failed message, and the ECGI of described shortMAC-I and/or described RRC reconstruction trial sub-district;
Described target BS also is used for, after receiving described response message, mate the context of described terminal according to described context match information wherein, and the described shortMAC-I by wherein and/or described RRC rebuild the context that the ECGI that attempts the sub-district verifies described terminal, if be proved to be successful, then the contextual information according to the described terminal in the described response message carries out the upright flow process of RRC reconstruction; After receiving described failed message, mate the context of described terminal according to described context match information wherein, and the described shortMAC-I by wherein and/or described RRC rebuild the context that the ECGI that attempts the sub-district verifies described terminal, if be proved to be successful, then whether initiate to obtain the contextual flow process of described terminal again according to described failure cause decision.
13. as claim 11 or 12 described systems, it is characterized in that,
Described target BS also is used for, for the specific identifier of described terminal distribution and be included in the described request message that obtains the terminal contextual information; And, receive response message or failed message after, discern described terminal according to the specific identifier that wherein described target BS distributes;
Described source base station also is used for, after receiving the described request message that obtains the terminal contextual information, at least comprise the specific identifier that described target BS distributes in response message that returns or failed message, perhaps also comprising the specific identifier that distributes according to described target BS is the corresponding specific identifier of described terminal distribution.
14. the contextual system that obtains of terminal, the RRC that is applied to terminal rebuilds upright, it is characterized in that, described system comprises that source base station and terminal carry out RRC and rebuild the target BS of immediately selecting, wherein:
Described target BS is used for, receive that the RRC that terminal sends rebuilds when standing request, if there is not the contextual information of described terminal, then the PCI information matches of rebuilding in the upright request message according to described RRC arrives described source base station, and send the request message that obtains the terminal contextual information to described source base station, comprise the context match information in this request message, shortMAC-I and RRC rebuild the ECGI that attempts the sub-district;
Described source base station is used for, after receiving the described request message that obtains the terminal contextual information, mate the context of described terminal according to described context match information wherein, and verify the context of described terminal by described shortMAC-I, if be proved to be successful, the context of described terminal exists, and allow described terminal to switch or the incision Target cell, then return response message, carry the contextual information of described terminal in this response message to described target BS; If verify that the context of the context failure of described terminal, described terminal does not exist, described cell-of-origin forbids switching or Target cell is that described terminal is forbidden the sub-district cut to Target cell, then return failed message to described target BS, carry failure cause in this failed message, described failure cause is that context does not exist, the terminal authentication failed, forbid switching or forbidding incision.
15. system as claimed in claim 14 is characterized in that,
Described source base station also is used for, and comprises described context match information and described shortMAC-I and/or described ECGI in described response message that returns or described failed message;
Described target BS also is used for, after receiving described response message, mate the context of described terminal according to described context match information wherein, and the described shortMAC-I by wherein and/or described RRC rebuild the context that the ECGI that attempts the sub-district verifies described terminal, if be proved to be successful, then the contextual information according to the described terminal in the described response message carries out the upright flow process of RRC reconstruction; After receiving described failed message, mate the context of described terminal according to described context match information wherein, and the described shortMAC-I by wherein and/or described RRC rebuild the context that the ECGI that attempts the sub-district verifies described terminal, if be proved to be successful, then whether initiate to obtain the contextual flow process of described terminal again according to described failure cause decision.
16. as claim 14 or 15 described systems, it is characterized in that,
Described target BS also is used for, for the specific identifier of described terminal distribution and be included in the described request message that obtains the terminal contextual information; And, receive response message or failed message after, discern described terminal according to the specific identifier that wherein described target BS distributes;
Described source base station also is used for, after receiving the described request message that obtains the terminal contextual information, at least comprise the specific identifier that described target BS distributes in response message that returns or failed message, perhaps also comprising the specific identifier that distributes according to described target BS is the corresponding specific identifier of described terminal distribution.
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