CN102348217A - Method for determining object network element in switching process and system thereof - Google Patents

Method for determining object network element in switching process and system thereof Download PDF

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Publication number
CN102348217A
CN102348217A CN2010102420610A CN201010242061A CN102348217A CN 102348217 A CN102348217 A CN 102348217A CN 2010102420610 A CN2010102420610 A CN 2010102420610A CN 201010242061 A CN201010242061 A CN 201010242061A CN 102348217 A CN102348217 A CN 102348217A
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network element
rrc
target network
information
upright
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CN102348217B (en
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韩立锋
高音
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ZTE Corp
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ZTE Corp
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Priority to PCT/CN2011/076505 priority patent/WO2012013107A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085—Hand-off measurements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00835—Determination of neighbour cell lists
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support

Abstract

The invention discloses a method for determining an object network element in a switching process and a system thereof. The method comprises the following steps: after cell reselection, in a process of establishing connection between user equipment (UE) and a reselection network element, addressing information of an object network element is carried; according to the carried addressing information of the object network element in the process of establishing connection, the reselection network element sends wireless links failure RLF indication information to the object network element. According to the method, the wireless links failure indication information is accurately sent to the object network element, realization of deciding a switching scene by the object network element is ensured, realization of carrying out optimization on a concrete switching parameter by a network and realization of a network optimization function are ensured, thus network performance is raised.

Description

Confirm the method and system of target network element in the handoff procedure
Technical field
The present invention relates to the handoff technique in the mobile communication system, refer to confirm in a kind of handoff procedure the method and system of target network element especially.
Background technology
Long Term Evolution (LTE; Long Term Evolution) network is by Universal Terrestrial Radio Access Network (E-UTRAN, Evolved UTRAN), evolution base station (eNB, Evolved NodeB) and the evolution packet switching center (EPC of evolution; Evolved Packet Core) forms the network flattening.Wherein, E-UTRAN comprises the set of the eNB that is connected through the S1 interface with EPC, can connect through X2 between the eNB.S1 interface, X2 interface 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.
MANET (SON) is a kind of technology of carrying out network configuration and optimization automatically.The characteristics of SON technology are the self-configuring self-optimizings; The application of this technology in LTE makes that LTE base station (being eNB) can be according to the automatic configuration network parameter of certain measurement, and carries out Automatic Optimal according to network change; Thereby keep network performance optimum, practice thrift lot of manpower and material resources simultaneously.
For the self-optimization of switching parameter of LTE system, need optimize district reselecting and switch relevant parameter according to certain algorithm, to improve the performance of network according to the operation conditions of network, the measurement that switching is relevant.The switching here comprises the switching of LTE internal system and the switching between system; Wherein, Switching between system refers to Universal Terrestrial Radio Access Network (UTRAN; Universal Terrestrial Radio AccessNetwork) or global system for mobile communications (GSM; Global System For Mobile Communication) or the switching of code division multiple access (CDMA, Code Division Multiple Access) system.
The process that switch at the terminal in network roughly comprises: network side is according to this sub-district of terminal to report and signal quality of adjacent cells and the handover decisions made based on certain handoff algorithms, and then carries out the execution of concrete switching flow according to handover decisions notice terminal.In handoff procedure; Being provided with of inappropriate handoff parameter can cause rattling switching, handoff failure or Radio Link Failure (RLF; Radio Link Failure) not cool switching result such as, these all are the switchings of not expecting, user's experience has been caused negative effect and wasted Internet resources.Therefore, for self-optimization of switching parameter, be the basis of carrying out the handoff parameter adjustment to the accurate judgement of handoff failure or the handoff scenario do not expected.
Radio Link Failure (RLF, radio link failure) during very poor or handoff failure, can take place in wireless link signals in subscriber equipment (UE, User Equipment), and it is upright to carry out the reconstruction of Radio Resource control (RRC, RadioResource Control).UE rebuilds immediately carrying out RRC, and the program through cell selecting obtains Target cell.The handoff failure that in handoff procedure, takes place, source base station or target BS can keep user's information, are used for RRC and rebuild upright.UE is in the upright request message of the reconstruction of RRC; Can identify (UE ID by carried terminal; UE-Identity), UE is at the Radio Network Temporary Identifier (C-RNTI of sub-district; Cell RadioNetwork Temporary Identifier), Duan MAC integrity verification value (short MAC-I; ShortMedium Access Control integrity protection) and cell physical address (PCI, Physical CellIdentity).Wherein, C-RNTI distributes (scene of handoff failure) in the cell-of-origin, or (other scene) of in the sub-district of triggering the RRC reconstruction, distributing; PCI is meant the physical address (scene of handoff failure) of cell-of-origin, or is triggering the physical address (other scene) that RRC rebuilds upright sub-district; The calculating of short MAC integrity verification value is to adopt (scene of handoff failure) of cell-of-origin or at the K that triggers the sub-district that RRC rebuilds RRCintKey and protection algorithm integrallty, wherein, K RRCintKey is the key that the RRC integral algorithm needs; Input is the Cell Global Identity (ECGI of PCI, C-RNTI and evolution; Evolved Cell Global Identifier); Wherein, PCI, C-RNTI above-mentionedly carry in the RRC reconstruction message, and ECGI is the ECGI of the Target cell when RRC rebuilds, selected of UE.
Fig. 1 is a kind of switching sketch map of late scene excessively, as shown in Figure 1, among the sub-district b (Cell b) of UE under eNB B RLF has taken place, and perhaps (is failing cell handoff procedure a) from cell b to sub-district a; Then, UE attempts carrying out the RRC reconstruction among the Cell a under eNB A again.Shown in Figure 1ly illustrated that the switching of this UE Cell b Cell a to the sub-district from the sub-district is late excessively.
Fig. 2 is a kind of sketch map that switches too early scene; As shown in Figure 2; Switch to the Cella of UE under eNB A behind the sub-district Cell b under the eNB B soon, just in Cell b, Radio Link Failure has taken place, perhaps handoff procedure, fail from cell a to cell b; Then, UE has selected sub-district Cell a to carry out the RRC reconstruction, just gets back to again and carries out the RRC reconstruction in the sub-district before switching.Shown in Figure 2ly illustrated that this UE is too early to the switching of Cell b from Cell a.
Fig. 3 is a kind of sketch map that switches the scene of selecting wrong cell, and as shown in Figure 3, the sub-district c (Cell c) of UE under eNB C switches to after the Cell b under the eNB B soon, and RLF has just taken place, and perhaps the handoff procedure from cell c to cell b, fails; Then, the sub-district Cell a of UE under eNB A carries out the RRC reconstruction.Cell b under the eNB B that selection has been described shown in Figure 3 is wrong Target cell, and correct Target cell is Cell a, and just UE should directly carry out the switching from Cell c to Cell a.
In the prior art, the judgement mode of handoff scenario there is following manner:
A kind of handoff scenario is: RLF has taken place in UE in the cell2 under the eNB2, has selected to carry out among the cell1 under the eNB1 RRC reconstruction then and has stood successfully.The judgement mode roughly comprises:
UE sends RRC and rebuilds upright request message to eNB1, and then eNB1 sends RLF indication (RLFindication) information to eNB2, in RLF indication information, includes the PCI of cell2, the C-RNTI of UE in cell2, the ECGI of cell1; Optional; Can also further carry the relevant report information (UE RLF Report Container) of Radio Link Failure of short MAC-I and UE measurement; Wherein, UE RLF Report Container is meant UE preserves and the UE that reports measured the Serving cell and the signal quality of peripheral cell before or after RLF;
After eNB2 received RLF indication information, context (context) information according to wherein UE promptly adopted PCI and C-RNTI to mate UE, and can utilize short MAC-I to verify.If there be the timer of UE from opening after cell1 switches to cell2, it is too early then to judge the switching of this UE from cell1 to cell2; If there be the timer of UE from opening after cell3 switches to cell2, then judging the switching of this UE from cell3 to cell2 is to have selected wrong cell.And send handover report (handover report) message to corresponding eNB.Otherwise it is late excessively to judge the switching of UE from cell2 to cell1.
In said process; The target eNB that RLF indication information is sent is that eNB1 shines upon according to the PCI in the upright request message of RRC reconstruction of the UE that receives; Its prerequisite is to have set up X2 interface between eNB1 and the eNB2; Like this; ENB1 could can shine upon the Global base station sign (Global eNB ID) of eNB2 according to the PCI information of cell2, thereby can send RLF indication information to eNB2.If do not set up X2 interface between eNB1 and the eNB2, and cell1 is not configured to the adjacent area with cell2, and so, eNB1 is global identity and the TAI information that can not go out eNB2 according to the PCI information mapping of cell2, also just can't be addressed to target eNB certainly.
Also have a kind of handoff scenario as shown in Figure 4: RLF takes place among the cell 2 of UE under eNB2 and in the cell1 eNB1 under, carry out RRC and rebuild upright the failure, UE changes free time (Idle) attitude over to, among the cell3 of district reselecting under the eNB3 and carry out RRC and set up successfully.For handoff scenario shown in Figure 4, wherein a kind of judgement mode as shown in Figure 5, the judgement mode roughly comprises:
ENB1 sends RLFindication information to eNB2 after receiving that the RRC of UE rebuilds upright request (RRC reestablish) message, eNB2 according to RLF indication judgement be switch too early or switched late, still selected wrong cell; ENB3 according to RLF metrical information indication wherein, initiates the RLF metrical information to UE and obtains request after the RRC that receives UE sets up completion (RRC establish) message, and UE reports the RLF metrical information; ENB3 is again through RLF indication information; The RLF metrical information that obtains and the identification information of UE are issued eNB1; ENB1 will send to eNB2 as the second portion of the RLF indication information that self sends to eNB2 once more from the RLF indication information of eNB3, and whether eNB2 adjudicates according to RLF metrical information wherein is covering problem.
Another kind of judgement mode as shown in Figure 6, the judgement mode roughly comprises:
ENB3 directly issues eNB2 with the RLF metrical information that obtains and the identification information of UE; Wherein contain UE and switch to for the first time from the last time that RRC rebuilds the time difference between upright the trial; ENB 2 judgements are switching problem or covering problem; If switching problem; Then switch to for the first time from the last time that RRC rebuilds the concrete handoff scenario of time difference judgement between upright the trial, as it is too early or switched to wrong cell to switch evening or switching according to UE.
In two kinds of judgement modes of above-mentioned Fig. 5 and Fig. 4; When eNB3 sends RLF indication information; All exist the problem of how addressing; If eNB3 and eNB1 or eNB2 do not have X2 interface; And cell3 and cell1 or cell2 are not the adjacent areas; So, eNB3 only can not be addressed to eNB1 or eNB2 according to PCI or ECGI, thereby can't accurately send RLF indication information to target BS.
The handoff procedure that from prior art, provides is visible; Owing to there is the addressing information of target network element (like above-mentioned target BS) that can not unique definite transmission RLFindication information; So; Can't guarantee that target network element is according to RLF indication relevant information; Ruling out is the realization of which kind of handoff scenario; Can not guarantee that network has hindered the smooth realization of the self-optimization function of network, thereby reduced network performance the realization that concrete handoff parameter is optimized on this basis.
Summary of the invention
In view of this; Main purpose of the present invention is to provide the method and system of confirming target network element in a kind of handoff procedure; The addressing information of the target network element of can be unique definite transmission RLF indication information; Guarantee the realization of target network element to the judgement of handoff scenario; And guarantee the smooth realization of the self-optimization function of realization that network is optimized concrete handoff parameter and network, thereby improve network performance.
For achieving the above object, technical scheme of the present invention is achieved in that
Confirm the method for target network element in a kind of handoff procedure, after district reselecting, comprising: user equipment (UE) and gravity treatment network element connect in the process, carry the addressing information of target network element;
The gravity treatment network element according to the addressing information of the target network element of carrying in the process of connecting, sends Radio Link Failure RLF indication information to target network element.
Also comprise before this method:
It is upright that said UE carries out the radio resource control RRC reconstruction, and rebuild in the upright process at RRC, carries the addressing information of target network element;
RRC rebuilds upright network element by request, according to the addressing information of the target network element of carrying, sends the RLF indication information to target network element.
Said target network element is the network element that RLF takes place UE; Saidly send the RLF indication information to target network element and comprise:
Said gravity treatment network element sends the RLF indication information via core net to the network element that RLF takes place said UE.
If said UE rebuilds upright failure, after district reselecting, this method also comprises: said UE and gravity treatment network element connect in the process, carry the addressing information of target network element; The gravity treatment network element according to the addressing information of the target network element of carrying in the process of connecting, sends the RLF indication information to target network element;
Said target network element is that UE the network element of RLF takes place or rebuild upright network element by request RRC.
In said and gravity treatment network element connected process, the addressing information of said target network element was carried at the UE info response message, or RRC sets up request message, or RRC sets up and accomplishes in the message.
The addressing information of said target network element is carried at RRC and rebuilds in upright request message or RRC reconstruction upright completion message or the UE info response message.
This method also comprises:
The said network element that stands of being rebuild by request RRC carries an indication in the upright message of RRC reconstruction or RRC reconfiguration message or other downstream message, be used to indicate UE whether need report the addressing information of target network element;
When said indicated number need report the addressing information of target network element, said UE reshuffled completion message through RRC reconstruction upright completion message or RRC and carries the addressing information of target network element.
When the upright process of said RRC reconstruction completed successfully, this method also comprised:
Said UE carries the indication that UE preserves RLF measurement of correlation information in sending to the RRC foundation completion message of the said network element that is stood by request RRC reconstruction;
The said network element that is stood by request RRC reconstruction sends the UE information request message to UE, requires said UE to report RLF measurement of correlation information;
Said UE reports to the addressing information of RLF measurement of correlation information and target network element through the UE info response message and is saidly rebuild upright network element by request RRC.
The said network element that is stood by request RRC reconstruction also further carries an indication in the UE information request message, be used to indicate UE to report the addressing information of target network element.
In said and gravity treatment network element connected process, the addressing information of said target network element was carried at RRC and sets up request message or RRC and set up and accomplish message or UE info response message or RRC and reshuffle and accomplish in message or other upstream message.
This method also comprises: said gravity treatment network element is set up in message or UE information request message or RRC reconfiguration message or other downstream message at RRC and is carried an indication, is used to indicate UE whether need report the addressing information of target network element.
Said target network element is to be rebuild upright network element by request RRC; Saidly send the RLF indication information to target network element and comprise:
Said gravity treatment network element is rebuild upright network element transmission RLF indication information to said by request RRC via core net; Saidly rebuild upright network element by request RRC the RLF indication information that receives is sent to target network element as the second portion of the RLF indication information that self sends to target network element.
Said target network element or the network element or the gravity treatment network element that are stood by request RRC reconstruction are: base station/Home eNodeB or radio network controller (RNC) or base station controller BSC.
The addressing information of said target network element is specially for sending the RLF indication information to the needed addressing information of target network element:
When said target network element was Long Term Evolution LTE base station, said addressing information comprised Global base station sign and tracing area sign TAI information, perhaps, can comprise the information of said Global base station sign and TAI content;
When said target network element was the RNC among the universal mobile telecommunications system UMTS, said addressing information comprised in Location Area Identification LAI, Routing Area sign indicating number RAC, base station controller sign, the extended base station controller identifier one or multinomial;
When said target network element was the base station controller in the global mobile communication gsm system, said addressing information was cellular global identity CGI.
Confirm the system of target network element in a kind of handoff procedure, comprise UE, target network element and gravity treatment network element at least, wherein,
Said UE, be used for the gravity treatment network element process that connects, the addressing information of target network element is passed to the gravity treatment network element;
The gravity treatment network element, be used for the UE process that connects, obtain the addressing information of target network element, after RRC sets up successfully, send the RLF indication information to target network element;
Target network element is used to receive the RLF indication information.
Said system also comprises the network element that is stood by request RRC reconstruction, wherein,
UE also is used for carrying out RRC with the network element that is stood by request RRC reconstruction and rebuilds upright process, rebuilds the addressing information that carries target network element in the process of standing at RRC;
RRC rebuilds upright network element by request, is used for carrying out RRC with UE and rebuilds upright process, rebuilds the addressing information that upright process is obtained target network element at RRC, and RRC sends RLFindication information to target network element after rebuilding and standing successfully;
Target network element also is used to receive the RLF indication information of rebuilding upright network element from by request RRC, and accomplishes the judgement of handoff scenario.
When said UE rebuilds upright failure,
Said UE, also be used for the said gravity treatment network element process that connects, the addressing information of target network element is passed to the gravity treatment network element;
The gravity treatment network element; Also be used for after RRC sets up successfully; Rebuild upright network element by request RRC and send the RLF indication information to said, saidly rebuild upright network element by request RRC and again this RLF indication information is sent to target network element as the second portion of the RLF indication information that sends to target network element.
In the LTE system, it is base station/Home eNodeB that said target network element or request RRC rebuild upright network element or gravity treatment network element;
In the UMTS system, it is RNC that said target network element or request RRC rebuild upright network element or gravity treatment network element;
In gsm system, it is BSC that said target network element or request RRC rebuild upright network element or gravity treatment network element.
Can find out from the technical scheme that the invention described above provides, be included in district reselecting after, subscriber equipment (UE) and gravity treatment network element connect in the process, carry the addressing information of target network element; The gravity treatment network element according to the addressing information of the target network element of carrying in the process of connecting, sends Radio Link Failure RLF indication information to target network element.。Pass through the inventive method; Accurately sent the Radio Link Failure indication information to target network element; Guaranteed the realization of target network element to the judgement of handoff scenario; And guaranteed the smooth realization of the self-optimization function of realization that network is optimized concrete handoff parameter and network, thereby improved network performance.
Description of drawings
Fig. 1 is a kind of switching sketch map of late scene excessively;
Fig. 2 is a kind of sketch map that switches too early scene;
Fig. 3 is a kind of sketch map that switches the scene of selecting wrong cell;
Fig. 4 is a kind of sketch map of handoff scenario;
Fig. 5 is a kind of sketch map of adjudicating mode of handoff scenario shown in Figure 4;
Fig. 6 is the sketch map of the another kind judgement mode of handoff scenario shown in Figure 4;
Fig. 7 is for confirming the flow chart of the method for target network element in the handoff procedure of the present invention;
Fig. 8 is for confirming the composition structural representation of the system of target network element in the handoff procedure of the present invention.
Embodiment
Fig. 7 as shown in Figure 7, comprising for confirming the flow chart of the method for target network element in the handoff procedure of the present invention:
Step 700: after district reselecting, UE and gravity treatment network element connect in the process, carry the addressing information of target network element.Target network element is the network element that RLF takes place UE.
Step 701: the gravity treatment network element, according to the addressing information of the target network element of carrying in the process of connecting, send Radio Link Failure RLF indication information to target network element.
Also comprise before the inventive method: UE carries out the RRC reconstruction and stands, and rebuilds in the process of standing at RRC, carries the addressing information of target network element, founds the addressing information that carries target network element in request message or the upright completion of the RRC reconstruction message etc. such as rebuilding at RRC; RRC rebuilds upright network element by request; Addressing information according to the target network element of carrying; Send RLF indication information to target network element; Such as being asked RRC to rebuild upright request message of RRC reconstruction or the upright message etc. of accomplishing of RRC reconstruction that upright network element receives UE, can obtain the addressing information of target network element.
Further, if UE rebuilds upright failure, after district reselecting; Connect in the process with the gravity treatment network element; UE can pass through UE information response (UE Information Response) message, or RRC sets up request message, or RRC sets up and accomplishes message and carry the addressing information of target network element; Receive UEInformation Response message or RRC and set up request message or RRC and set up the gravity treatment network element of accomplishing message,, send RLF indication information to target network element according to the addressing information of the target network element of wherein carrying.At this moment, target network element is that UE the network element of RLF takes place or rebuild upright network element by request RRC.
Further, if UE does not carry out district reselecting, said gravity treatment network element is UE resident sub-district behind Radio Link Failure.
Wherein, (target) network element is: base station (comprising Home eNodeB) or radio network controller (RNC, Radio Network Controller) or base station controller (BSC, Base Station Controller).
The addressing information of target network element is: send RLF indication information to the needed addressing information of target network element:
When target network element was the LTE base station, addressing information comprised Global base station sign (Global eNB ID) and tracing area sign (TAI) information, perhaps can comprise the information of said Global eNB ID and TAI content, such as ECGI and TAI information;
When target network element was the radio network controller (RNC) in the universal mobile telecommunications system (UMTS), addressing information comprised in Location Area Identification (LAI), Routing Area sign indicating number (RAC), base station controller sign (RNC-ID), the extended base station controller identifier (Extended RNC-ID) one or multinomial;
When target network element is the base station controller in the gsm system; Addressing information is cellular global identity (CGI; Cell global identity); Wherein, CGI is by public land mobile communication network (PLMN; PublicLand Mobile-communication Network) identity, Location Area Code (LAC), cell ID (CI, cell identity), Routing Area sign indicating number (RAC) are formed, and wherein RAC is an option.
Pass through the inventive method; Accurately sent RLF indication information to target network element; Guaranteed the realization of target network element to the judgement of handoff scenario; And guaranteed the smooth realization of the self-optimization function of realization that network is optimized concrete handoff parameter and network, thereby improved network performance.
To the inventive method, the system that confirms target network element in a kind of handoff procedure also is provided, as shown in Figure 8, comprise UE, target network element and gravity treatment network element at least, wherein,
UE, be used for the gravity treatment network element process that connects, the addressing information of target network element is passed to the gravity treatment network element;
The gravity treatment network element, be used for the UE process that connects, obtain the addressing information of target network element, after RRC sets up successfully, send the RLF indication information to target network element;
Target network element is used to receive the RLF indication information.
System of the present invention also comprises the network element that is stood by request RRC reconstruction, wherein,
UE also is used for carrying out RRC with the network element that is stood by request RRC reconstruction and rebuilds upright process, rebuilds the addressing information that carries target network element in the process of standing at RRC;
RRC rebuilds upright network element by request, is used for carrying out RRC with UE and rebuilds upright process, rebuilds the addressing information that upright process is obtained target network element at RRC, and RRC sends RLFindication information to target network element after rebuilding and standing successfully;
Target network element also is used to receive the RLF indication information of rebuilding upright network element from by request RRC, and accomplishes the judgement of handoff scenario.
When UE rebuilds upright failure, further, UE, also be used for the said gravity treatment network element process that connects, the addressing information of target network element is passed to the gravity treatment network element;
The gravity treatment network element; Also be used for after RRC sets up successfully; Rebuild upright network element by request RRC and send the RLF indication information to said, saidly rebuild upright network element by request RRC and again this RLF indication information is sent to target network element as the second portion of the RLF indication information that sends to target network element.
Wherein, network element (comprising that target network element, request RRC rebuild upright network element, gravity treatment network element) is base station (eNodeB) (comprising Home eNodeB) in the LTE system; In the UMTS system RNC; In gsm system BSC.
To combine embodiment that the inventive method is carried out detailed description below.In following examples, network element 1 is the eNB1 under the cell1, and network element 2 is the eNB2 under the cell2, and network element 3 is the eNB3 under the cell3.
First embodiment in conjunction with handoff scenario shown in Figure 4, supposes that UE RRC in the LTE system rebuilds stand successfully, in the present embodiment through founding the addressing information that the addressing information that carries network element 2 in the request message transmits target network element in the RRC reconstruction.The concrete realization of first embodiment is described below:
Suppose that UE is in connected state in the Cell2 that network element 2 is had jurisdiction over;, handoff failure very poor owing to wireless link signals or other reason cause having taken place Radio Link Failure (RLF; Radio link failure); The cell1 that UE has selected network element 1 to be had jurisdiction over carries out RRC and rebuilds upright; UE sends the Datagram RRC that carries network element 2 to network element 1 and rebuilds upright request message, and in cell1, carries out RRC and set up successfully;
Network element 1 is rebuild the addressing information of the network element 2 that carries in the upright request message according to RRC; Send RLFindication information to network element 2; The concrete realization comprises: network element 1 sends RLF indication information to core net (CN; Core Network), CN sends to network element 2 according to the addressing information of network element 2 with RLF indication information;
Network element 2 is adjudicated concrete handoff scenario according to RLF indication information with relevant UE context timer, for example, switches evening or switches too early or switched to wrong cell; Network side carries out the optimization of handoff parameter according to the concrete scene of switching.(belong to prior art about how to adjudicate and optimize, its concrete realization does not belong to protection scope of the present invention, is not used in qualification protection scope of the present invention yet.)
Can find out from the realization of first embodiment; Even do not have X2 interface between network element 1 and the network element 2; Because the RRC that network element 1 receives rebuilds the addressing information that carries network element 2 in the upright request message, therefore, has guaranteed that also network element 1 accurately sends to network element 2 with RLF indication information.
Second embodiment in conjunction with handoff scenario shown in Figure 4, supposes that UE RRC in the LTE system rebuilds stand successfully, founds the addressing information that the addressing information that carries network element 2 in the completion message transmits target network element through rebuilding at RRC in the present embodiment.The concrete realization of second embodiment is described below:
Suppose that UE is in connected state in the Cell 2 that network element 2 is had jurisdiction over;, handoff failure very poor owing to wireless link signals or other reason cause having taken place RLF (RLF occur); The cell1 that UE has selected network element 1 to be had jurisdiction over carries out RRC and rebuilds upright; UE sends RRC to network element 1 and rebuilds upright request message; In cell1, carry out RRC rebuild stand successfully after, UE rebuilds at the RRC that sends to network element 1 and founds the addressing information that carries network element 2 in the completion message.Further; Network element 1 can be set up in message (RRC setup) or RRC reconfiguration message (RRC Connection Reconfiguration) or other downstream message at RRC and carry an indication; Be used to indicate UE whether need report the addressing information of network element 2; If need, then UE can reshuffle the addressing information of completion (RRC Connection Reconfigurationcomplete) information reporting network element 2 through RRC reconstruction upright completion message or RRC;
Network element 1 is rebuild the upright addressing information of accomplishing the network element 2 that carries in the message according to RRC; Send RLFindication information to network element 2; The concrete realization comprises: network element 1 sends RLF indication information to CN, and CN sends to network element 2 according to the addressing information of network element 2 with RLF indication information;
Network element 2 is adjudicated concrete handoff scenario according to RLF indication information with relevant UE context timer, for example, switches evening or switches too early or switched to wrong cell; Network side carries out the optimization of handoff parameter according to the concrete scene of switching.(belong to prior art about how to adjudicate and optimize, its concrete realization does not belong to protection scope of the present invention, is not used in qualification protection scope of the present invention yet.)
The 3rd embodiment in conjunction with handoff scenario shown in Figure 4, supposes that UE RRC in the LTE system rebuilds to stand successfully, transmits the addressing information of target network element in the present embodiment through the addressing information that in UE Information Response message, carries network element 2.The concrete realization of the 3rd embodiment is described below:
Suppose that UE is in connected state in the Cell 2 that network element 2 is had jurisdiction over;, handoff failure very poor owing to wireless link signals or other reason cause having taken place RLF; The cell1 that UE has selected network element 1 to be had jurisdiction over carries out RRC and rebuilds upright; UE sends RRC to network element 1 and rebuilds upright request message; In cell1, carry out RRC rebuild stand successfully after; UE sends RRC to network element 1 and rebuilds the upright message of accomplishing, and sets up at the RRC of UE and accomplishes in the message, carries the indication that UE preserves RLF measurement of correlation information; Network element 1 sends UE information request (UE Information Request) to UE; Require UE to report RLF measurement of correlation information, UE reports to network element 1 through UE information response (UE Information Response) with the addressing information of RLF measurement of correlation information and network element 2.Further, network element 1 can also carry an indication and requires UE to report the Datagram indication of network element 2 in UE Information Request message;
Network element 1 is according to the addressing information of the network element 2 that carries among the UE Information Response; Send RLFindication information to network element 2; The concrete realization comprises: network element 1 sends RLF indication information to CN, and CN sends to network element 2 according to the addressing information of network element 2 with RLF indication information;
Network element 2 is adjudicated concrete handoff scenario according to RLF indication information with relevant UE context timer, for example, switches evening or switches too early or switched to wrong cell; Network side carries out the optimization of handoff parameter according to the concrete scene of switching.(belong to prior art about how to adjudicate and optimize, its concrete realization does not belong to protection scope of the present invention, is not used in qualification protection scope of the present invention yet.
The 4th embodiment; In conjunction with handoff scenario shown in Figure 5; Suppose that RRC rebuilds upright failure; UE RRC in the LTE system sets up successfully, sets up the addressing information that the addressing information that carries network element 1 in completion message or the UE Information Response message transmits target network element through set up request message or RRC at RRC in the present embodiment.The concrete realization of the 4th embodiment is described below:
Suppose that UE is in connected state in the Cell 2 that network element 2 is had jurisdiction over;, handoff failure very poor owing to wireless link signals or other reason cause having taken place RLF; It is upright that UE has selected cell1 to carry out the RRC reconstruction; UE sends RRC to network element 1 and rebuilds upright request message; Owing to do not have context (context) or other reason of UE among the cell1; The RRC of UE in cell 1 rebuilds upright failure, and UE changes the idle attitude over to.Through district reselecting, cell3 is arrived in gravity treatment to UE in the idle attitude, and sends RRC to network element 3 and set up request message, and RRC sets up and successfully gets into connected state.Wherein, UE is selecting cell1 to carry out can obtaining the addressing information of network element 1 through the broadcast message that reads cell1 in the upright process of RRC reconstruction;
After network element 1 is received the upright request message of RRC reconstruction from UE; Send Radio Link Failure indication RLF indication information to network element 2; RLF has taken place in indication UE; In RLF indication information, include from RRC and rebuild C-RNTI and the PCI that obtains the upright request message from UE; And the global identity ECGI of the upright cell1 that attempts of UE selection carrying out RRC reconstruction, can also further carry short MAC integrity verification value (shortMAC-I);
After network element 2 is received RLF indication information, match concrete UE context according to C-RNTI that wherein carries and PCI; Further, can also utilize shortMAC-I to verify.Network element 2 can basis and the timer of this UE context, and the handoff procedure of the last time of this UE is judged concrete handoff scenario.For example, if the timer of this UE context is overtime, then can judge it is that once the switching from cell2 to cell1 is late excessively; If the timer of this UE context is not overtime, and the cell-of-origin of the handoff procedure of the last time of UE is cell1, judges that then this is that once the switching from cell1 to cell2 is too early; If the timer of this UE context is not overtime, and the cell-of-origin of the handoff procedure of the last time of UE is other sub-district, judges that then the switching from this other sub-district to cell2 is to have switched to wrong cell; (belong to prior art about how to adjudicate, its concrete realization does not belong to protection scope of the present invention, is not used in qualification protection scope of the present invention yet.)
The RRC that network element 3 receives from UE sets up completion message, wherein carries the indication that UE preserves RLF measurement of correlation information.Network element 3 sends UE Information Request message to UE; Require UE to report RLF measurement of correlation information; UE through UE Information Response message with RLF measurement of correlation information reporting to network element 3; Wherein can also further carry the RRC that UE sends in the UE Information Response message and rebuild the PCI that carries in the upright request message, C-RNTI in cell1; Can also further carry Short MAC-I, can also further carry UE and behind RLF, carry out the ECGI that RRC rebuilds the upright cell1 that attempts for the first time.Wherein, can set up request message or RRC at RRC sets up and accomplishes message or UE Information Response message or RRC and reshuffle the addressing information that carries network element 1 in completion (the RRCConnection Reconfiguration Complete) message.
Further; Network element 3 can be set up in message (RRC setup) or UE InformationRequest or RRC reconfiguration message (RRC Connection Reconfiguration) or other downstream message at RRC and carry an indication; Be used to indicate UE whether need report the addressing information of network element 1; If need, then UE sets up through RRC and accomplishes the addressing information that message or UE Information Response message or RRC are reshuffled completion information reporting network element 1;
Network element 3 sends RLF indication information to CN, and CN sends to network element 1 according to the addressing information of network element 1 with RLFindication information.Include RRC in the RLF indication information here and rebuild C-RNTI and the PCI that carries in the upright request message; Can also further carry Short MAC-I; Can also further carry UE and select to carry out the ECGI that RRC rebuilds the upright cell1 that attempts; Can also further carry the RLF measurement of correlation information that UE reports, can also carry further that to be used to identify be the sign of RLF indication second portion;
Network element 1 is received the RLF indication information from network element 3, and it is sent to network element 2 as the second portion that network element 1 self sends to the RLF indication information of network element 2.After network element 2 is received second RLFindication information, confirm handoff parameter problem or covering problem according to the RLF measurement of correlation information of wherein carrying.For example the signal quality of Serving cell and best peripheral cell is all poor, and explanation possibly exist here and covers leak etc. so.(about how confirming to belong to prior art, its concrete realization does not belong to protection scope of the present invention, is not used in qualification protection scope of the present invention yet.)
The 5th embodiment; In conjunction with handoff scenario shown in Figure 5; Suppose that RRC rebuilds upright failure; UE RRC in the LTE system sets up successfully, sets up the addressing information that the addressing information that carries network element 2 in completion message or UE Information Response message or other upstream message transmits target network element through set up request message or RRC at RRC in the present embodiment.The concrete realization of the 5th embodiment is described below:
Suppose that UE is in connected state in the Cell 2 that network element 2 is had jurisdiction over;, handoff failure very poor owing to wireless link signals or other reason cause having taken place RLF; It is upright that UE has selected cell1 to carry out the RRC reconstruction; UE rebuilds upright request message to network element 1 to sending RRC; Owing to there is not the context context of UE among the cell 1; The RRC of UE in cell 1 rebuilds upright failure, and UE changes the idle attitude over to.Perhaps, UE has selected cell1 but has not initiated the upright request of RRC reconstruction directly to change the idle attitude over to, and for example cell1 is an intersystem cell.Through district reselecting, gravity treatment is to cell3 in the idle attitude for UE, and sends RRC to network element 3 and set up request message, and UE carries out RRC and sets up and successfully get into connected state;
The RRC that network element 3 receives from UE sets up completion message, wherein carries the indication that UE preserves RLF measurement of correlation information.Network element 3 sends UE Information Request message to UE, requires UE to report RLF measurement of correlation information, UE through UE Information Response message with RLF measurement of correlation information reporting to network element 3.Wherein, Can also further carry the RRC that UE sends in the UE Information Response message and rebuild the PCI that carries in the upright request message in cell1; C-RNTI; Short MAC-I; Wherein, PCI is the PCI of cell2, and C-RNTI is a parameter relevant with this UE among the cell2 with Short MAC-I.Can also further carry UE and behind RLF, carry out the global identity that RRC rebuilds the sub-district cell1 of upright trial selection for the first time; Can also further carry UE and switch to sub-district cell2 and the time difference of attempting standing, can also further carry the global identity of UE resident sub-district before cell2 in cell1 initiation RRC reconstruction.Wherein, Can set up request message or RRC at RRC sets up and accomplishes message or UEInformation Response message or RRC and reshuffle and accomplish the addressing information that carries network element 2 in message or other upstream message; Here, the addressing information of network element 2 can be that UE obtains through the broadcast message that reads cell2.
Further; Network element 3 can be set up in message (RRC setup) or UE InformationRequest message or RRC reconfiguration message or other downstream message at RRC and carry an indication; Be used to indicate UE whether need report the addressing information of network element 2; If need, then UE can set up through RRC and accomplish message or UE Information Response message or RRC and reshuffle and accomplish the addressing information that message or other upstream message report network element 2;
Network element 3 sends RLF indication information to CN, and CN sends to network element 2 according to the addressing information of network element 2 with RLFindication information.Include in the RLF indication information here from RRC and rebuild C-RNTI and the PCI that obtains the upright request message; Can also further carry Short MAC-I; Can also further carry UE and select to carry out the global identity that RRC rebuilds the upright cell1 that attempts; Can also further carry the RLF measurement of correlation information that UE reports; Can also further carry UE and switch to cell2 and the time difference of attempting initiating the upright request of RRC reconstruction, can also further carry the global identity of UE resident sub-district before cell2 at cell1;
After network element 2 is received RLF indication information, match concrete UE context according to C-RNTI that wherein carries and PCI; Further, can also utilize shortMAC-I to verify.Network element 2 can basis switches to sub-district cell2 and attempts initiating the time difference that RRC rebuilds upright request at cell1 and judge concrete handoff scenario with the timer of this UE context and UE.For example, if the timer of this UE context, then can judge it is that once the switching from cell2 to cell1 is late excessively less than this time difference; If the timer of this UEcontext is greater than this time difference, and the cell-of-origin of the handoff procedure of the last time of UE is cell1, judges that then this is that once the switching from cell1 to cell2 is too early; If the timer of this UE context is greater than this time difference, and the cell-of-origin of the handoff procedure of the last time of UE is other sub-district cell 4, judges that then the switching of the cell 4 to cell2 from this other sub-district is to have switched to wrong cell.And can from RLFindication information, obtain the global identity of UE resident sub-district before cell2, just described other sub-district cell 4; (belong to prior art about how to adjudicate, its concrete realization does not belong to protection scope of the present invention, is not used in qualification protection scope of the present invention yet.)
Network element 2 can also be confirmed handoff parameter problem or covering problem according to the RLF measurement of correlation information in the RLF indication information.For example the signal quality of Serving cell and best peripheral cell is all poor, and explanation possibly exist here and covers leak etc. so.(about how confirming to belong to prior art, its concrete realization does not belong to protection scope of the present invention, is not used in qualification protection scope of the present invention yet.)
The 6th embodiment, in conjunction with handoff scenario shown in Figure 4, suppose that UE RRC in the UMTS system rebuilds stand successfully that specifically realization is described below:
Suppose that UE is in connected state in the Cell2 that network element 2 is had jurisdiction over;, handoff failure very poor owing to wireless link signals or other reason cause having taken place RLF; It is upright that UE has selected the cell1 of UMTS system to carry out the RRC reconstruction; It is cell update (cellupdate) message that UE sends the upright request of RRC reconstruction to network element 1; Network element 1 sends cell update and confirms that (cellupdateconfirm) message is to UE; It is that radio bearer is reshuffled completion (RadioBearerReconfigurationComplete) message or transmission channel is reshuffled completion (transportchannelreconfigurationcomplete) message or physical channel is reshuffled completion (physicalchannelreconfigurationcomplete) message that UE returns reprovision completion message, and RRC rebuilds and stands successfully.Wherein, UE can cell update message or radio bearer reprovision accomplish message, transmission channel reshuffle accomplish message, physical channel is reshuffled and is accomplished the addressing information that carries network element 2 in the message;
Further, network element 1 can carry an indication in cell update confirm message or other downstream message, is used to indicate UE whether need report the addressing information of network element 2, if need, then UE reports the addressing information of network element 2;
Network element 1 sends RLF indication information according to the addressing information of network element 2 to network element 2.The concrete realization comprises: network element 1 sends RLF indication information to CN, and CN sends to network element 2 according to the addressing information of network element 2 with RLF indication information;
Network element 2 is adjudicated concrete handoff scenario according to RLF indication with relevant UE context timer, for example, switches evening, switches too early, switched to wrong cell; Network side carries out the optimization of handoff parameter according to the concrete scene of switching.(belong to prior art about how to adjudicate and optimize, its concrete realization does not belong to protection scope of the present invention, is not used in qualification protection scope of the present invention yet.)
The 7th embodiment in conjunction with handoff scenario shown in Figure 6, supposes that UE carries out in the UMTS system, carrying out RRC and setting up successfully after RRC rebuilds upright failure, and in the present embodiment, what UE reported is the addressing information of network element 1.The concrete realization is described below:
Suppose that UE is in connected state in the Cell 2 that network element 2 is had jurisdiction over;, handoff failure very poor owing to wireless link signals or other reason cause having taken place RLF; UE selected the cell1 of UMTS system carry out RRC rebuild upright because a variety of causes is rebuild upright failure or is initiated to rebuild upright the trial.Network element 1 sends RLF indication information to network element 2, in RLF indication information, includes the context of UE, the cell information that RLF takes place, the upright contents such as cell information of attempting of RRC reconstruction; Subsequently, UE changes the idle attitude over to, and district reselecting is initiated RRC and set up and set up successfully in the cell3 of UMTS system.UE can in cellupdate message or RRC sets up request message or RRC has set up the addressing information that carries network element 1 in message or UE InformationResponse message or other upstream message;
Further; Network element 3 can be set up in message (RRC setup) or UE InformationRequest or other downstream message at RRC and carry an indication; Be used to indicate UE whether need report the addressing information of network element 1, if need, then UE reports the addressing information of network element 1;
Network element 3 sends RLF indication information according to the addressing information of network element 1 to network element 1, specifically comprises: network element 3 sends RLF indication information to CN, and CN sends to network element 1 according to the addressing information of network element 1 with RLFindication information.Network element 1 sends to network element 2 with this part content as the second portion of RLF indication information again;
Network element 2 is adjudicated concrete handoff scenario according to RLF indication with relevant UE context timer, for example, switches evening, switches too early, switched to wrong cell.Network side carries out the optimization of handoff parameter according to the concrete scene of switching.(belong to prior art about how to adjudicate and optimize, its concrete realization does not belong to protection scope of the present invention, is not used in qualification protection scope of the present invention yet.)
The 8th embodiment in conjunction with handoff scenario shown in Figure 6, supposes that UE carries out in the UMTS system, carrying out RRC and setting up successfully after RRC rebuilds upright failure, and in the present embodiment, what UE reported is the addressing information of network element 2.The concrete realization is described below:
Suppose that UE is in connected state in the Cell 2 that network element 2 is had jurisdiction over;, handoff failure very poor owing to wireless link signals or other reason cause having taken place RLF; UE selected the cell1 of UMTS system carry out RRC rebuild upright because a variety of causes is rebuild upright failure or is initiated to rebuild upright the trial.UE changes the idle attitude over to, and district reselecting is in cell3; Subsequently, initiating RRC sets up and sets up successfully.UE can set up the addressing information that carries network element 2 in request message or RRC foundation completion message or the UE Information Response message at RRC;
Further; Network element 3 can be set up in message (RRC setup) or UE InformationRequest or other downstream message at RRC and carry an indication; Be used to indicate UE whether need report the addressing information of network element 2, if need, then UE reports the addressing information of network element 2;
Network element 3 sends RLF indication information according to the addressing information of network element 2 to network element 2, specifically comprises: network element 3 sends RLF indication information to CN, and core net sends to network element 2 according to the addressing information of network element 2 with RLF indication information;
Network element 2 is adjudicated concrete handoff scenario according to RLF indication with relevant UE context timer, for example, switches evening, switches too early, switched to wrong cell.Network side carries out the optimization of handoff parameter according to the concrete scene of switching.(belong to prior art about how to adjudicate and optimize, its concrete realization does not belong to protection scope of the present invention, is not used in qualification protection scope of the present invention yet.)
RLF measurement of correlation information in the above embodiment of the present invention is: 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, and in the positional information of UE one or multinomial.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to replacement and improvement etc., all should be included within protection scope of the present invention.

Claims (18)

1. confirm the method for target network element in the handoff procedure, it is characterized in that, after district reselecting, comprising: user equipment (UE) and gravity treatment network element connect in the process, carry the addressing information of target network element;
The gravity treatment network element according to the addressing information of the target network element of carrying in the process of connecting, sends Radio Link Failure RLF indication information to target network element.
2. method according to claim 1 is characterized in that, also comprises before this method:
It is upright that said UE carries out the radio resource control RRC reconstruction, and rebuild in the upright process at RRC, carries the addressing information of target network element;
RRC rebuilds upright network element by request, according to the addressing information of the target network element of carrying, sends the RLF indication information to target network element.
3. method according to claim 1 is characterized in that, said target network element is the network element that RLF takes place UE; Saidly send the RLF indication information to target network element and comprise:
Said gravity treatment network element sends the RLF indication information via core net to the network element that RLF takes place said UE.
4. method according to claim 2 is characterized in that, if said UE rebuilds upright failure, after district reselecting, this method also comprises: said UE and gravity treatment network element connect in the process, carry the addressing information of target network element; The gravity treatment network element according to the addressing information of the target network element of carrying in the process of connecting, sends the RLF indication information to target network element;
Said target network element is that UE the network element of RLF takes place or rebuild upright network element by request RRC.
5. method according to claim 1 is characterized in that, in said and gravity treatment network element connected process, the addressing information of said target network element was carried at the UE info response message, or RRC sets up request message, or RRC sets up and accomplishes in the message.
6. method according to claim 2 is characterized in that, the addressing information of said target network element is carried at RRC and rebuilds in upright request message or RRC reconstruction upright completion message or the UE info response message.
7. method according to claim 2 is characterized in that, this method also comprises:
The said network element that stands of being rebuild by request RRC carries an indication in the upright message of RRC reconstruction or RRC reconfiguration message or other downstream message, be used to indicate UE whether need report the addressing information of target network element;
When said indicated number need report the addressing information of target network element, said UE reshuffled completion message through RRC reconstruction upright completion message or RRC and carries the addressing information of target network element.
8. method according to claim 2 is characterized in that, when the upright process of said RRC reconstruction completed successfully, this method also comprised:
Said UE carries the indication that UE preserves RLF measurement of correlation information in sending to the RRC foundation completion message of the said network element that is stood by request RRC reconstruction;
The said network element that is stood by request RRC reconstruction sends the UE information request message to UE, requires said UE to report RLF measurement of correlation information;
Said UE reports to the addressing information of RLF measurement of correlation information and target network element through the UE info response message and is saidly rebuild upright network element by request RRC.
9. method according to claim 8 is characterized in that, the said network element that is stood by request RRC reconstruction also further carries an indication in the UE information request message, be used to indicate UE to report the addressing information of target network element.
10. method according to claim 4; It is characterized in that; In said and gravity treatment network element connected process, the addressing information of said target network element was carried at RRC and sets up request message or RRC and set up and accomplish message or UE info response message or RRC and reshuffle and accomplish in message or other upstream message.
11. method according to claim 10; It is characterized in that; This method also comprises: said gravity treatment network element is set up in message or UE information request message or RRC reconfiguration message or other downstream message at RRC and is carried an indication, is used to indicate UE whether need report the addressing information of target network element.
12. method according to claim 11 is characterized in that, said target network element is to be rebuild upright network element by request RRC; Saidly send the RLF indication information to target network element and comprise:
Said gravity treatment network element is rebuild upright network element transmission RLF indication information to said by request RRC via core net; Saidly rebuild upright network element by request RRC the RLF indication information that receives is sent to target network element as the second portion of the RLF indication information that self sends to target network element.
13. method according to claim 1 and 2 is characterized in that, said target network element or the network element or the gravity treatment network element that are stood by request RRC reconstruction are: base station/Home eNodeB or radio network controller (RNC) or base station controller BSC.
14., it is characterized in that the addressing information of said target network element is specially for sending the RLF indication information to the needed addressing information of target network element according to each described method of claim 1～12:
When said target network element was Long Term Evolution LTE base station, said addressing information comprised Global base station sign and tracing area sign TAI information, perhaps, can comprise the information of said Global base station sign and TAI content;
When said target network element was the RNC among the universal mobile telecommunications system UMTS, said addressing information comprised in Location Area Identification LAI, Routing Area sign indicating number RAC, base station controller sign, the extended base station controller identifier one or multinomial;
When said target network element was the base station controller in the global mobile communication gsm system, said addressing information was cellular global identity CGI.
15. confirm the system of target network element in the handoff procedure, it is characterized in that, comprise UE, target network element and gravity treatment network element at least, wherein,
Said UE, be used for the gravity treatment network element process that connects, the addressing information of target network element is passed to the gravity treatment network element;
The gravity treatment network element, be used for the UE process that connects, obtain the addressing information of target network element, after RRC sets up successfully, send the RLF indication information to target network element;
Target network element is used to receive the RLF indication information.
16. system according to claim 15 is characterized in that, said system also comprises the network element that is stood by request RRC reconstruction, wherein,
UE also is used for carrying out RRC with the network element that is stood by request RRC reconstruction and rebuilds upright process, rebuilds the addressing information that carries target network element in the process of standing at RRC;
RRC rebuilds upright network element by request, is used for carrying out RRC with UE and rebuilds upright process, rebuilds the addressing information that upright process is obtained target network element at RRC, and RRC sends RLFindication information to target network element after rebuilding and standing successfully;
Target network element also is used to receive the RLF indication information of rebuilding upright network element from by request RRC, and accomplishes the judgement of handoff scenario.
17. system according to claim 16 is characterized in that, when said UE rebuilds upright failure,
Said UE, also be used for the said gravity treatment network element process that connects, the addressing information of target network element is passed to the gravity treatment network element;
The gravity treatment network element; Also be used for after RRC sets up successfully; Rebuild upright network element by request RRC and send the RLF indication information to said, saidly rebuild upright network element by request RRC and again this RLF indication information is sent to target network element as the second portion of the RLF indication information that sends to target network element.
18., it is characterized in that in the LTE system, it is base station/Home eNodeB that said target network element or request RRC rebuild upright network element or gravity treatment network element according to each described system of claim 15～17;
In the UMTS system, it is RNC that said target network element or request RRC rebuild upright network element or gravity treatment network element;
In gsm system, it is BSC that said target network element or request RRC rebuild upright network element or gravity treatment network element.
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CN103581961A (en) * 2012-07-27 2014-02-12 电信科学技术研究院 Method and device for reporting and processing wireless link failure
CN103686884A (en) * 2012-09-25 2014-03-26 中国移动通信集团公司 Method, system and base station, and webmaster for transmitting RLF information
CN103841608A (en) * 2012-11-21 2014-06-04 中兴通讯股份有限公司 Method, device and system for radio resource control connection reestablishment
CN114449603A (en) * 2012-12-24 2022-05-06 北京三星通信技术研究有限公司 Base station in wireless communication system and method performed by the same
CN110049577A (en) * 2018-01-15 2019-07-23 大唐移动通信设备有限公司 A kind of method and device that radio resource control RRC re-establishes
CN110049577B (en) * 2018-01-15 2021-02-02 大唐移动通信设备有限公司 Method and device for reestablishing Radio Resource Control (RRC)
CN110149630A (en) * 2018-02-11 2019-08-20 华为技术有限公司 A kind of negotiation of security algorithm, sending method and device
WO2021008478A1 (en) * 2019-07-16 2021-01-21 夏普株式会社 Information reporting method and corresponding user equipment

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