CN103517349A - X2 handover method and system - Google Patents
X2 handover method and system Download PDFInfo
- Publication number
- CN103517349A CN103517349A CN201210203449.9A CN201210203449A CN103517349A CN 103517349 A CN103517349 A CN 103517349A CN 201210203449 A CN201210203449 A CN 201210203449A CN 103517349 A CN103517349 A CN 103517349A
- Authority
- CN
- China
- Prior art keywords
- enb
- source enb
- gateway
- switches
- destination
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention provides an X2 handover method comprising: transport layer addresses of all serving gateways which can be connected with an eNB are configured on the eNB through an operation maintenance bench of the evolved node B eNB; a source-side eNB sends handover request information to an object-side eNB, wherein the handover request information is carried with the transport layer addresses of the serving gateways which are connected with and serves the source-side eNB; the object-side eNB judges whether a connection exists between the object-side eNB and the serving gateways which are connected with and serves the source-side eNB based on the transport layer addresses configured by the operation maintenance bench; and if the object-side eNB judges that the connection exists between the object-side eNB and the serving gateways, the object-side eNB sends handover request acknowledgement information to the source-side eNB. The beneficial effects of the X2 handover method and system are that: when initiating the X2 handover request, the source-side eNB can know whether the connection exists between the selected object-side eNB and the serving gateways so as to perform handover effectively and prevent the failure possibility of follow-up handover.
Description
Technical field
The present invention relates to moving communicating field, more specifically, relate to the method and system that X2 switches.
Background technology
UE (User Equipment, user terminal) to eNB (E-UTRAN Node B, evolution base station) send MEASUREMENT REPORT (measurement report), eNB adjudicates whether can also serve this UE according to measurement report, when the result of judgement, think can not continue to serve this UE time, can select another one eNB as the object base station of switching.When eNB detect and selected eNB between there is X2 link, and two eNB are in same MME (Mobility Management Entity, mobile management entity) range of management time, source eNB can switch by the preferential X2 of initiation.Two kinds of scenes that X2 switches in 23.401 agreements, are provided: the X2 without S-GW (Serving Gateway, gateway) reorientation switches (being called for short scene one) and exists the X2 of S-GW reorientation to switch (being called for short scene two).
The switching flow of scene one as shown in Figure 1.Be specially:
Source eNB sends Handover Request (handover request) message to destination eNB, message has been carried transport layer address and the address, tunnel of S-GW, destination eNB receives that the backward source eNB of message returns to Handover Request Ack (handover request is replied) message, message has been carried in order to the transport layer address of anti-pass and address, tunnel, source eNB receives after this response message, to UE, send Handover Command (switching command) message, notice UE switches, UE is cut over to destination eNB transmission Handover Comfirm (switch and confirm) message, inform that the link that destination eNB eats dishes without rice or wine is logical, now UE starts to send upstream data to destination eNB, destination eNB receives that the backward S-GW of upstream data delivers.Destination eNB sends Path Switch Request (path handover request) message to MME, transport layer address and the address, tunnel of destination eNB in message, have been carried, the data of informing S-GW can issue to destination eNB, MME makes after a series of configuration after receiving message, to destination eNB, return to Path Switch Request Ack (path handover request is replied) message, UE and S-GW have switched to destination eNB, and can carry out the transmission of up-downgoing data.
The switching flow of scene two as shown in Figure 2.Be specially:
From starting until destination eNB sends Path Switch Request message to MME, and the switching flow of scene one is identical.MME receives after Path Switch Request message, can distribute new S-GW for destination eNB, and at MME to transport layer address and the address, tunnel of carrying new S-GW in the Path Switch Request Ack message of destination eNB loopback, destination eNB receives after message, the upstream data of receiving from UE is no longer delivered to source S-GW, turned to destination S-GW to deliver.So far, UE has switched to destination eNB, and new S-GW also starts to serve destination eNB.
Two kinds of above-mentioned switching flows have all been ignored a problem when initiating: if do not exist IP to connect between S-GW and destination eNB, and can handoff failure.For scene one, be specially: UE sends Handover Comfirm message to destination eNB, UE just sends data to destination eNB afterwards, destination eNB receives after the data that UE sends, to deliver to S-GW, but owing to not existing IP to connect between destination eNB and S-GW, upstream is ended at this point, causes handoff failure.For scene two, be specially: UE sends Handover Comfirm message to destination eNB, UE just sends data to destination eNB afterwards, destination eNB receives after the data that UE sends, still to deliver upstream data to source S-GW, until destination eNB receives after Path Switch Request Ack message, can be just that its newly assigned destination S-GW delivers upstream data to MME.But the data that destination eNB delivers to source S-GW are all lost, and cause handoff failure.And the failure of this switching occurs after UE has been linked into destination eNB, if again initiate S1, switch there's not enough time.And in existing protocol, whether source eNB, when initiating X2 handover request, is cannot learn between selected destination eNB and S-GW (corresponding to scene two, being source S-GW) to exist IP to connect.This is the possibility that causes follow-up handoff failure.
Summary of the invention
In order to solve technological deficiency described above, the invention provides the method and system that a kind of X2 that carries out effectively switching switches.
For achieving the above object, the present invention takes following technical scheme:
The method that X2 switches, comprising:
1) the Operation and Maintenance platform by evolution base station eNB configures transport layer address that can connected all gateways on eNB;
2) source eNB sends handover request message to destination eNB, and described handover request message carries the transport layer address that is connected and serves the gateway of source eNB with source eNB;
3) destination eNB is according to the transport layer address of Operation and Maintenance platform configuration, judges it and is connected source eNB and serves between the gateway of source eNB whether have connection;
4) if exist and be connected between destination eNB judgement and this gateway, to source eNB transmission handoff request acknowledgment message.
Preferably, described X2 switches to without the X2 in the situation of gateway reorientation and switches, and destination eNB is after source eNB sends handoff request acknowledgment message, and destination eNB and source eNB carry out the follow-up handoff procedure that this X2 switches.
Preferably, described X2 switches to exist without the X2 in the situation of gateway reorientation and switches, and destination eNB is after source eNB sends handoff request acknowledgment message, and destination eNB and source eNB carry out the follow-up handoff procedure that this X2 switches.
The method that X2 of the present invention switches also comprises:
If do not exist and be connected between destination eNB judgement and this gateway,, to source eNB transmission handover cancelling message, finish this switching.
A system for the method that X2 switches, comprising:
Configuration module, for the Operation and Maintenance platform by evolution base station eNB on eNB, configure can connected all gateways transport layer address;
X2 hand-off process module, at this eNB during as destination eNB, for carrying when being connected with source eNB and serving the handover request message of transport layer address of gateway of source eNB receiving, according to the transport layer address of Operation and Maintenance platform configuration, judge it and be connected source eNB and serve between the gateway of source eNB whether have connection;
Wherein, if exist and be connected between destination eNB judgement and this gateway, to source eNB transmission handoff request acknowledgment message.
The present invention is owing to taking above-described technical scheme, it has the following advantages: source eNB is when initiating X2 handover request, can learn between selected destination eNB and gateway whether have connection, effectively to switch, avoid the possibility of follow-up handoff failure.
Accompanying drawing explanation
Fig. 1 is the flow chart that the X2 without S-GW reorientation in the situation that of prior art switches;
Fig. 2 is the flow chart that the X2 in the situation that there is S-GW reorientation of prior art switches;
Fig. 3 is the flow chart according to the X2 switching of exemplary embodiment of the present invention.
Embodiment
In order to make technical scheme of the present invention and advantage clearer, below in conjunction with accompanying drawing, the present invention is described in further detail.
Fig. 3 is the flow chart according to the X2 switching of exemplary embodiment of the present invention.As shown in Figure 3, handoff procedure specifically comprises:
101: the Operation and Maintenance platform by evolution base station eNB configures transport layer address that can connected all gateways on eNB;
102: source eNB sends handover request message to destination eNB, and described handover request message carries the transport layer address that is connected and serves the gateway of source eNB with source eNB;
103: destination eNB is according to the transport layer address of Operation and Maintenance platform configuration, judge it and be connected source eNB and serve between the gateway of source eNB whether have connection;
104: if exists and be connected between destination eNB judgement and this gateway, to source eNB transmission handoff request acknowledgment message, and carry out the follow-up handoff procedure of this X2 switching.
105: if do not exist and be connected between destination eNB judgement and this gateway,, to source eNB transmission handover cancelling message, finish this switching.
Obviously, those skilled in the art deliberately carries out various changes and modification and does not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (5)
1. the method that X2 switches, is characterized in that, comprising:
Operation and Maintenance platform by evolution base station eNB configures transport layer address that can connected all gateways on eNB;
Source eNB sends handover request message to destination eNB, and described handover request message carries the transport layer address that is connected and serves the gateway of described source eNB with described source eNB;
Described destination eNB is according to the described transport layer address of described Operation and Maintenance platform configuration, judges it and is connected described source eNB and serves between the gateway of described source eNB whether have connection;
If exist and be connected between described destination eNB judgement and this gateway, to described source eNB transmission handoff request acknowledgment message.
2. the method for claim 1, is characterized in that:
Described X2 switches to without the X2 in the situation of gateway reorientation and switches, and described destination eNB is after described source eNB sends handoff request acknowledgment message, and described destination eNB and source eNB carry out the follow-up handoff procedure that this X2 switches.
3. the method for claim 1, is characterized in that:
Described X2 switches to exist without the X2 in the situation of gateway reorientation and switches, and described destination eNB is after described source eNB sends handoff request acknowledgment message, and described destination eNB and source eNB carry out the follow-up handoff procedure that this X2 switches.
4. the method for claim 1, is characterized in that, also comprises:
If do not exist and be connected between described destination eNB judgement and this gateway,, to described source eNB transmission handover cancelling message, finish this switching.
5. a system for the method that the X2 of realization described in claim 1 to 4 any one switches, is characterized in that, comprising:
Configuration module, for the Operation and Maintenance platform by evolution base station eNB on eNB, configure can connected all gateways transport layer address;
X2 hand-off process module, at this eNB during as destination eNB, for carrying when being connected with described source eNB and serving the handover request message of transport layer address of gateway of described source eNB receiving, according to the described transport layer address of described Operation and Maintenance platform configuration, judge it and be connected described source eNB and serve between the gateway of described source eNB whether have connection;
Wherein, if exist and be connected between described destination eNB judgement and this gateway, to described source eNB transmission handoff request acknowledgment message.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210203449.9A CN103517349A (en) | 2012-06-19 | 2012-06-19 | X2 handover method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210203449.9A CN103517349A (en) | 2012-06-19 | 2012-06-19 | X2 handover method and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103517349A true CN103517349A (en) | 2014-01-15 |
Family
ID=49899178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210203449.9A Pending CN103517349A (en) | 2012-06-19 | 2012-06-19 | X2 handover method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103517349A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105472681A (en) * | 2014-09-03 | 2016-04-06 | 上海贝尔股份有限公司 | Virtual base station dynamic migration method and device |
| CN108541392A (en) * | 2015-11-12 | 2018-09-14 | 瑞典爱立信有限公司 | Method for cell selection |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101965028A (en) * | 2009-07-23 | 2011-02-02 | 中兴通讯股份有限公司 | Method, device and system for implementing X2 switching |
| CN102170667A (en) * | 2010-02-25 | 2011-08-31 | 中兴通讯股份有限公司 | A method, a system and a base station device used for base station switching |
-
2012
- 2012-06-19 CN CN201210203449.9A patent/CN103517349A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101965028A (en) * | 2009-07-23 | 2011-02-02 | 中兴通讯股份有限公司 | Method, device and system for implementing X2 switching |
| CN102170667A (en) * | 2010-02-25 | 2011-08-31 | 中兴通讯股份有限公司 | A method, a system and a base station device used for base station switching |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105472681A (en) * | 2014-09-03 | 2016-04-06 | 上海贝尔股份有限公司 | Virtual base station dynamic migration method and device |
| CN108541392A (en) * | 2015-11-12 | 2018-09-14 | 瑞典爱立信有限公司 | Method for cell selection |
| CN108541392B (en) * | 2015-11-12 | 2021-06-01 | 瑞典爱立信有限公司 | Method for cell selection |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101965028B (en) | A kind of method, Apparatus and system realizing X2 and switch | |
| CN102761965B (en) | The successional method of user apparatus service and device is kept after tracking area update | |
| CN112911726B (en) | Method and device for establishing user plane bearer | |
| KR101960562B1 (en) | Methods and apparatus for controlling circuit switched fall back of a mobile station from e-utran to utran/geran in a full-multi-operator core network | |
| US10554793B2 (en) | Routing of MPTCP subflows | |
| CN103096294A (en) | Distribution method, device and system for controlling tunnel identifiers | |
| KR20130041996A (en) | Methods and apparatus for managing a handover between base stations | |
| US20160127959A1 (en) | Pdn gateway device and mobile communication method | |
| CN105992293B (en) | Method and equipment for switching between networks | |
| US9998957B2 (en) | Minimisation of handover gap time in the context of S2a IP session mobility | |
| US8442534B2 (en) | Mobile communication method, radio access apparatus, and gateway apparatus | |
| CN104796948A (en) | Method of modifying radio bearer in dual-connection network and system | |
| ATE546024T1 (en) | A METHOD FOR A ßDUAL TRANSFER MODE FORWARDING | |
| US20130128864A1 (en) | Method and apparatus for handover between heterogeneous networks | |
| JP2013093915A (en) | Mobile communication system and communication control method | |
| CN104105143A (en) | Method for supporting SIPTO service | |
| EP2922344A1 (en) | Switching of uplink user plane termination point of a serving gateway for a bearer in dual connectivity operation | |
| CN105282805A (en) | Method and system for switching call service from PS domain to CS domain and devices for switching call service from PS domain to CS domain | |
| EP2986052A1 (en) | Call preservation on handover | |
| CN105101311B (en) | Bearer switching method, equipment and system | |
| CN104756548A (en) | Switching method, base station, and mobile management body | |
| CN104144456A (en) | Base station switching method and device | |
| CN104053200A (en) | Method for UE to switch between UMTS and LTE system, and device | |
| CN111200851A (en) | Data communication method and device | |
| CN103517349A (en) | X2 handover method and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140115 |
|
| WD01 | Invention patent application deemed withdrawn after publication |