CN102480796A - Method and system for realizing connection reestablish of radio resource control protocol - Google Patents
Method and system for realizing connection reestablish of radio resource control protocol Download PDFInfo
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- CN102480796A CN102480796A CN2010105553578A CN201010555357A CN102480796A CN 102480796 A CN102480796 A CN 102480796A CN 2010105553578 A CN2010105553578 A CN 2010105553578A CN 201010555357 A CN201010555357 A CN 201010555357A CN 102480796 A CN102480796 A CN 102480796A
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Abstract
The invention discloses a method and a system for realizing connection reestablish of a radio resource control (RRC) protocol. The method includes steps of sending radio link failure indication to a source eNode B attributive to the UE (user equipment) through an X2 interface after the source eNode B receives an RRC connection reestablish request sent by the UE, and carrying identification information capable of implementing the RRC connection reestablish by switching. The source eNode B is informed that RRC connection reestablish can be realized by switching after receiving the wireless connection failure indication, then sends switching request to a target eNode B and carries context information of the UE, the RRC connection reestablish of the UE is started after the target eNode B receives the switching request. Supporting range and scene of the current protocol to the RRC connection reestablish are broadened, and dropped calls caused by failure of the radio link failure in the network can be effectively reduced.
Description
Technical field
The present invention relates to communication field, relate in particular to the method and system of a kind of realization RRC (Radio Resource Control, radio resource control) connection reconstruction.
Background technology
Introduced the method for RRC (Radio Resource Control, radio resource control) connection reconstruction in LTE (Long Term Evolution, the Long Term Evolution) network; When because reason such as wireless quality difference, cause that RRC is connected interruption between UE (User Equipment, subscriber equipment) and eNodeB (evolution base station); When Radio Link Failure takes place; Can recover RRC again through the method for RRC connection reconstruction and connect, reduce cutting off rate, promote user's susceptibility.
In 3GPP (The 3rd Generation Partnership Project, third generation partner program) agreement 36.300-940, RRC method for reconstructing and the scope of supporting in the current protocol version is described and defines.In the current protocol version; After UE detects Radio Link Failure; If the sub-district that UE inserts again and Serving cell before be at same eNodeB, perhaps the sub-district inserted again of UE is the Target cell of handoff procedure, then can recover again to call out through RRC connection reconstruction mode.But, if the sub-district that UE inserts again and before Serving cell not at same eNodeB, the Target cell that neither switch then can't recover to call out through the RRC connection reconstruction.
Can find out that the application scenarios of call re-establishment is limited in the current protocol version.
Summary of the invention
The technical problem that the present invention will solve is exactly the method and system that proposes a kind of RRC of realization connection reconstruction, strides eNodeB RRC and rebuilds to realize the LTE network.
In order to address the above problem, the present invention provides a kind of method that realizes radio resource control (RRC) connection reconstruction, comprising:
After target evolution base station (eNodeB) receives the RRC connection reconstruction request message of subscriber equipment (UE) transmission; Send the radio link failure Indication message through X2 interface to the source eNodeB of said UE ownership, carry the identification information that can carry out the RRC connection reconstruction through switching;
After said source eNodeB receives said radio link failure Indication message, know and to carry out the RRC connection reconstruction through switching, then send handoff request message, carry the contextual information of said UE to said target eNode B;
After said target eNode B receives said handoff request message, initiate RRC connection reconstruction to said UE.
Preferably, said method has following characteristics:
Said identification information is represented through the handoff request field that causes owing to the RRC connection reconstruction.
Preferably, said method has following characteristics:
After said target eNode B receives said handoff request message, reply switching request acknowledgement message, require said source eNodeB to send the user face data of said UE to said target eNode B to said source eNodeB.
Preferably, said method has following characteristics:
After said target eNode B receives said handoff request message, reply switching to said source eNodeB and prepare failed message, cancel said source eNodeB sends user face data from said UE to said target eNode B.
In order to address the above problem; The present invention provides a kind of system that realizes the radio resource control connection reconstruction; Comprise: source eNodeB, the said UE of UE, said UE ownership detect the target eNode B that inserts after the connection failure; Wherein, said target eNode B comprises first module and second module;
After said UE is used to detect connection failure, send RRC connection reconstruction request message to said target eNode B;
After said first module is used to receive said RRC connection reconstruction request message, send the radio link failure Indication message to said source eNodeB, carry the identification information that can carry out the RRC connection reconstruction through switching through X2 interface;
After said source eNodeB is used to receive said radio link failure Indication message, knows and to carry out the RRC connection reconstruction through switching, then send handoff request message, carry the contextual information of said UE to said target eNode B;
After said second module receives said handoff request message, initiate RRC connection reconstruction to said UE.
Preferably, said system has following characteristics:
Said identification information is represented through the handoff request field that causes owing to the RRC connection reconstruction.
Preferably, said system has following characteristics:
After said second module also is used to receive said handoff request message, reply switching request acknowledgement message, require said source eNodeB to send the user face data of said UE to said target eNode B to said source eNodeB; Perhaps, receive said handoff request message after, reply to switch to said source eNodeB and prepare failed message, cancel said source eNodeB sends user face data from said UE to said target eNode B.
In order to address the above problem, the present invention provides a kind of eNodeB, comprises first module and second module, wherein,
After said first module is used to receive the RRC connection reconstruction request message of UE transmission, send the radio link failure Indication message to the source eNodeB of said UE ownership, carry the identification information that can carry out the RRC connection reconstruction through switching through X2 interface;
When said second module is used to receive the handoff request message of the contextual information that carries said UE that said source eNodeB sends, initiate RRC connection reconstruction to said UE.
Preferably, above-mentioned eNodeB has following characteristics:
Said identification information is represented through the handoff request field that causes owing to the RRC connection reconstruction.
Preferably, above-mentioned eNodeB has following characteristics:
After said second module also is used to receive said handoff request message, reply switching request acknowledgement message, require said source eNodeB to send the user face data of said UE to said eNodeB to said source eNodeB; Perhaps, receive said handoff request message after, reply to switch to said source eNodeB and prepare failed message, cancel said source eNodeB sends user face data from said UE to said eNodeB.
The present invention has expanded support scope and the scene of current agreement to the RRC connection reconstruction, can effectively reduce in the network because the call drop that Radio Link Failure produces.
Description of drawings
Fig. 1 be the embodiment of the invention one stride eNodeB RRC connection reconstruction (X2 interface forwarding user face data) flow chart;
Fig. 2 be the embodiment of the invention two stride eNodeB RRC connection reconstruction (X2 interface is not transmitted user face data) flow chart.
Embodiment
Hereinafter will combine accompanying drawing that embodiments of the invention are elaborated.Need to prove that under the situation of not conflicting, embodiment among the application and the characteristic among the embodiment be combination in any each other.
The initial eNodeB that inserts of UE is source eNodeB (Source eNodeB), and it is target eNode B (Target eNodeB) that UE detects the eNodeB that inserts behind the Radio Link Failure.
Core concept of the present invention is; After target eNode B receives the RRC connection reconstruction request message (RRC Connection Re-establishment Request) of UE transmission; Can be through carrying radio link failure Indication message (the RLF INDICATION of identification information; Radio Link Failure INDICATION), the source eNodeB of informing can carry out the RRC connection reconstruction through switching.
Particularly; After target eNode B receives the RRC connection reconstruction request message (RRC Connection Re-establishment Request) of UE transmission; Send radio link failure Indication message (RLF INDICATION) through X2 interface to the source eNodeB of said UE ownership, carry the identification information that can carry out the RRC connection reconstruction through switching; After said source eNodeB receives said radio link failure Indication message, know and to carry out the RRC connection reconstruction through switching, then send handoff request message (Handover request), carry the contextual information of said UE to said target eNode B; After said target eNode B receives said handoff request message, initiate RRC connection reconstruction (RRC Connection Re-establishment) to said UE.
Wherein, the said identification information that carries in the radio link failure Indication message can be represented through handoff request (the handover request due to RRC Connection Reestablish) field that causes owing to the RRC connection reconstruction.This field is an Optional Field, when this field is designated as 1, can represent that target eNode B 2 hopes to carry out the RRC connection reconstruction through handoff request (handover request) flow process; When this field is designated as 0 or when not existing, can represent that eNodeB2 does not hope to carry out the RRC connection reconstruction through handoff request (handover request) flow process.
After target eNode B receives said handoff request message (handover request); Can reply switching request acknowledgement message (Handover Request ACK) to said source eNodeB, require said source eNodeB to send the user face data of said UE to said target eNode B through X2 interface; Also can reply to switch and prepare failed message (Handover Preparation Failure), cancel said source eNodeB sends user face data from said UE to said target eNode B to said source eNodeB.
Embodiment one:
Be described in detail striding eNodeB RRC connection reconstruction (X2 interface forwarding user face data) process below in conjunction with Fig. 1.
Step 102; Target eNode B is sent the source eNodeB that RLF INDICATION message is given the original persistent district place of UE through X2 interface; Wherein carry handover request due to RRC Connection Reestablish field, and this field configuration is 1;
After step 104, target eNode B are received Handover Request, send Handover Request ACK message, set up related resources such as X2 interface transmission, be used for follow-up user face data and transmit to source eNodeB;
Step 105 after source eNodeB receives Handover Request ACK, is sent SN Status Transfer (serial-number-state transfer) message to target eNode B;
Step 109, MME sends User Plan Update Request (user plans upgrade request) message to Serving Gateway (gateway);
Step 110, Serving Gateway sends User Plan Update Response (user plans the upgrading response) message to MME;
Embodiment two:
Be described in detail striding eNodeB RRC connection reconstruction (X2 interface is not transmitted user face data) process below in conjunction with Fig. 2.
Step 202; Target eNode B is sent the source eNodeB that RLF INDICATION message is given the original persistent district place of UE through X2 interface; Wherein carry handover request due to RRC Connection Reestablish field, and this field configuration is 1;
After step 204, target eNode B are received Handover Request, send Handover Preparation Failure message to source eNodeB;
Step 205, target eNode B are sent RRC Connection Re-establishment message according to the UE contextual information in the handover Request message of receiving in the step 204 to UE, and the RRC that rebuilds UE connects;
Step 206 after UE receives RRC Connection Re-establishment message, is rebuild UE side RRC and is connected, and return RRC Connection Re-establishment Complete message to target eNode B;
Step 207, target eNode B is sent Path Switch Request message to MME, require to switch the user data core network interface from the source eNodeB to target eNode B; This step can promptly begin after target eNode B is received Handover Requst;
Step 209, Serving Gateway sends User Plan Update Response message to MME;
Step 210, MME sends Path Switch Request ACK message to target eNode B;
Correspondingly; A kind of system that realizes the radio resource control connection reconstruction of the embodiment of the invention; Comprise: source eNodeB, the said UE of UE, said UE ownership detect the target eNode B that inserts after the connection failure, and wherein, said target eNode B comprises first module and second module;
After said UE is used to detect connection failure, send RRC connection reconstruction request message to said target eNode B;
After said first module is used to receive said RRC connection reconstruction request message, send the radio link failure Indication message to said source eNodeB, carry the identification information that can carry out the RRC connection reconstruction through switching through X2 interface;
After said source eNodeB is used to receive said radio link failure Indication message, knows and to carry out the RRC connection reconstruction through switching, then send handoff request message, carry the contextual information of said UE to said target eNode B;
After said second module receives said handoff request message, initiate RRC connection reconstruction to said UE.
Further, after said second module also is used to receive said handoff request message, reply switching request acknowledgement message, require said source eNodeB to send the user face data of said UE to said target eNode B to said source eNodeB; Perhaps, receive said handoff request message after, reply to switch to said source eNodeB and prepare failed message, cancel said source eNodeB sends user face data from said UE to said target eNode B.
The eNodeB of the embodiment of the invention, target eNode B repeats no more here as stated.
One of ordinary skill in the art will appreciate that all or part of step in the said method can instruct related hardware to accomplish through program, said program can be stored in the computer-readable recording medium, like read-only memory, disk or CD etc.Alternatively, all or part of step of the foregoing description also can use one or more integrated circuits to realize, correspondingly, each the module/unit in the foregoing description can adopt the form of hardware to realize, also can adopt the form of software function module to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. method that realizes radio resource control (RRC) connection reconstruction comprises:
After target evolution base station (eNodeB) receives the RRC connection reconstruction request message of subscriber equipment (UE) transmission; Send the radio link failure Indication message through X2 interface to the source eNodeB of said UE ownership, carry the identification information that can carry out the RRC connection reconstruction through switching;
After said source eNodeB receives said radio link failure Indication message, know and to carry out the RRC connection reconstruction through switching, then send handoff request message, carry the contextual information of said UE to said target eNode B;
After said target eNode B receives said handoff request message, initiate RRC connection reconstruction to said UE.
2. method according to claim 1 is characterized in that,
Said identification information is represented through the handoff request field that causes owing to the RRC connection reconstruction.
3. method according to claim 1 or claim 2 is characterized in that,
After said target eNode B receives said handoff request message, reply switching request acknowledgement message, require said source eNodeB to send the user face data of said UE to said target eNode B to said source eNodeB.
4. method according to claim 1 or claim 2 is characterized in that,
After said target eNode B receives said handoff request message, reply switching to said source eNodeB and prepare failed message, cancel said source eNodeB sends user face data from said UE to said target eNode B.
5. system that realizes the radio resource control connection reconstruction; It is characterized in that; Comprise: source eNodeB, the said UE of UE, said UE ownership detect the target eNode B that inserts after the connection failure, and wherein, said target eNode B comprises first module and second module;
After said UE is used to detect connection failure, send RRC connection reconstruction request message to said target eNode B;
After said first module is used to receive said RRC connection reconstruction request message, send the radio link failure Indication message to said source eNodeB, carry the identification information that can carry out the RRC connection reconstruction through switching through X2 interface;
After said source eNodeB is used to receive said radio link failure Indication message, knows and to carry out the RRC connection reconstruction through switching, then send handoff request message, carry the contextual information of said UE to said target eNode B;
After said second module receives said handoff request message, initiate RRC connection reconstruction to said UE.
6. like the said system of claim 5, it is characterized in that,
Said identification information is represented through the handoff request field that causes owing to the RRC connection reconstruction.
7. like claim 5 or 6 said systems, it is characterized in that,
After said second module also is used to receive said handoff request message, reply switching request acknowledgement message, require said source eNodeB to send the user face data of said UE to said target eNode B to said source eNodeB; Perhaps, receive said handoff request message after, reply to switch to said source eNodeB and prepare failed message, cancel said source eNodeB sends user face data from said UE to said target eNode B.
8. an eNodeB is characterized in that, comprises first module and second module, wherein,
After said first module is used to receive the RRC connection reconstruction request message of UE transmission, send the radio link failure Indication message to the source eNodeB of said UE ownership, carry the identification information that can carry out the RRC connection reconstruction through switching through X2 interface;
When said second module is used to receive the handoff request message of the contextual information that carries said UE that said source eNodeB sends, initiate RRC connection reconstruction to said UE.
9. like the said eNodeB of claim 8, it is characterized in that,
Said identification information is represented through the handoff request field that causes owing to the RRC connection reconstruction.
10. like claim 8 or 9 said eNodeB, it is characterized in that,
After said second module also is used to receive said handoff request message, reply switching request acknowledgement message, require said source eNodeB to send the user face data of said UE to said eNodeB to said source eNodeB; Perhaps, receive said handoff request message after, reply to switch to said source eNodeB and prepare failed message, cancel said source eNodeB sends user face data from said UE to said eNodeB.
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| CN104853390A (en) * | 2015-05-28 | 2015-08-19 | 武汉邮电科学研究院 | Failure handling method for S1 handover preparation phase of LTE system |
| CN105873241A (en) * | 2016-04-29 | 2016-08-17 | 北京小米移动软件有限公司 | Method and device for establishing talking connection |
| CN107770087A (en) * | 2017-08-29 | 2018-03-06 | 深圳市盛路物联通讯技术有限公司 | Router switching method and device of the Internet of Things based on connection quantity |
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| CN107770087A (en) * | 2017-08-29 | 2018-03-06 | 深圳市盛路物联通讯技术有限公司 | Router switching method and device of the Internet of Things based on connection quantity |
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| CN109982360A (en) * | 2017-12-27 | 2019-07-05 | 华为技术有限公司 | Communication means and device |
| CN109982360B (en) * | 2017-12-27 | 2021-12-10 | 华为技术有限公司 | Communication method and device |
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