CN102595493B - A kind of switching method and Mobile Access Gateway control function entity - Google Patents

Abstract

The present invention provides the switching method and mAGCF in a kind of DSN, and this method includes：After first mAGCF receives the handover request message from wireless side, send SIP INVITE messages to the 2nd mAGCF, the SIP INVITE messages and carry E mouth MAP handover request message；After first mAGCF receives the 2nd mAGCF MAP switching response messages of SIP encapsulation, inter-office switchover carrying is established with the 2nd mAGCF；The MAP that first mAGCF receives the 2nd mAGCF SIP encapsulation prepares after switching ready message, notifies the first radio network controller that user is switched to the second wireless network controller of the 2nd mAGCF controls.MAGCF inter-office switchovers flow in DSN domains can be realized by the present invention.

Description

A kind of switching method and Mobile Access Gateway control function entity

Technical field

The present invention relates to moving communicating field, more particularly in distributed business network (Distributed Service Network, abbreviation DSN) in carry out mAGCF (mobile Access Gateway Control Function, Mobile Access Network Close control function entity) switching method and mAGCF of interoffice.

Background technology

Network interconnection agreement (Internet Protocol, abbreviation IP) IP multimedia subsystem, IMS (IP Multimedia Core Network Subsystem, abbreviation IMS) it is by third generation partner program (3rd Generation Partnership Project, abbreviation 3GPP) propose a kind of IP-based network architecture, it constructs an open and flexible service environment, Multimedia application is supported, and provides the user abundant multimedia service.

IMS is unrelated with access technology, except can be GPRS (General Packet Radio Service, general point Group wireless traffic), the packet such as WLAN (Wireless Local Area Network, WLAN) (Packet Switching, abbreviation PS) access outside networks offer services, can also be GSM (Global System for Mobile Communications, global system for mobile communications), UMTS (Universal Mobile Telecommunications System, unified mobile communcations system) etc. mobile cellular network business is provided.

The mobile networks such as GSM, UMTS use circuit-switched technology, referred to as circuit (Circuit Switched, abbreviation CS) Domain, basic speech business, and the supplementary service based on speech business can be provided the user.When IMS is accessed in CS domains, its Develop into a kind of access way, business is provided by IMS is unified completely, and this technology is referred to as IMS centralized traffics (IMS Centralized Service, abbreviation ICS).

Distributed business network is on China Mobile ICS basis, for telecommunication service and mobile Internet business institute A new generation of proposition can run, manageable distributed kernel net system and function structure, be mainly used in tackling current telecommunications network In business and some challenges locked and faced are runed with Internet (internet), draw the characteristic of telecommunications network management With Internet business offer on it is quick, flexible, inexpensive and expansible the features such as, employ new technology (such as：P2P (points pair Point) distributed technology) drive the evolution of the network architecture and development.

Distributed business network framework by introducing adaptation unit mAGCF (MSC of transformation) as shown in figure 1, realize RANAP (Radio Access Network Application Part, Radio Access Network Application Part) agreement and SIP (Session Initiation Protocol, Session initiation Protocol) between conversion, realize BSS (base station sub-system)/RNS (Radio Network Subsystem, RNS) it is directly accessed DSN.

In the mobile communication network, occur in mobile subscriber's calling procedure across mobile switching centre (Mobile Services Switching Centre, abbreviation MSC) between position area move when, because of wireless network signal mass change, Radio Network System (Radio Network System, abbreviation RNS) can trigger inter-office switchover.

At present, in the inter-office switchover flow in common Radio Network System, as source base station sub-system RNC (Radio Network Controller, radio network controller)-A is by detecting, under the quality of wireless channel where finding calling is serious Drop, the channel strength of abutting subdistrict are stronger, this cell channel congestion is, it is necessary to which situations such as shunting, RNC-A obtain according to handoff algorithms Switching cell, Iu (chain of command and user plane) mouth handover request message is sent, MSC is the discovery that to switching source MSC-A, MSC-A Between inter-office switchover, by E interface transmit MAP-Prepare-Handover Req (preparation handover request) handover request disappear Breath, MSC-B receive the request message, apply for Handover Number, while search the RNC-B of ownership, send Iu mouth handover request message, Give Target RNC-B, it is desirable to for switching mobile subscriber (MS) prepare Radio Resource, after channel successful activation is switched, RNC-B to MSC-B returns to Iu mouth switch acknowledgment messages, and then Handover Number and RNC-B radio channel resource are passed through E interface by MSC-B MAP-Prepare-Handover Rsp (switching response message) are sent to MSC-A, and MSC-A passes through according to Handover Number ISUP (Integrated Services Digital Network User Part, ISUP) or SIP signalings establish the speech channel to MSC-B, and RNC-B sends out switching command to mobile station, and mobile station continues to lead in new carrier wave access Words.MSC-B sends out Map-Send-End-Signal Req to MSC-A and (sends and terminate scheduling request) end signal, instruction switching knot Beam, MSC-A is allowed to discharge Radio Resource.Hereafter, MSC-A master controls call overall process, once end of conversation, MSC-A sends interoffice and released Message is put to MSC-B, discharges interoffice speech channel.

Present inter-office switchover mechanism is, it is necessary to E interface MAP (Mobile Application Part, MAP) Signaling and interoffice junction signaling participate in jointly, in DSN (distributed business network), the introducing of dynamic node so that between mAGCF Signalling exchange has eliminated the reliance on Signaling System Number 7, and tradition switching MAP signaling processes can not be realized.

The content of the invention

The technical problem to be solved in the present invention is to provide the switching method in a kind of DSN and mAGCF, to realize in DSN domains MAGCF inter-office switchover flows.

In order to solve the above-mentioned technical problem, the invention provides the switching method in a kind of distributed business network, including：

After first Mobile Access Gateway control function entity (mAGCF) receives the handover request message from wireless side, Sending Session initiation Protocol (SIP) invites (INVITE) message to the 2nd mAGCF, the SIP INVITE messages to carry E mouths and move Dynamic application obscure portions (MAP) handover request message；

After first mAGCF receives the 2nd mAGCF MAP switching response messages of SIP encapsulation, established with the 2nd mAGCF Inter-office switchover carries；

The MAP that first mAGCF receives the 2nd mAGCF SIP encapsulation prepares after switching ready message, notifies that first is wireless User is switched to the second wireless network controller of the 2nd mAGCF controls by network controller.

Further, the above method also has following feature：First mAGCF and the 2nd mAGCF establishes inter-office switchover Carrying includes：

First mAGCF notifies the first WMG (MGW) to be established in original user's call context to the 2nd mAGCF Corresponding 2nd MGW first terminal, the information of session description protocol of first terminal is sent to the 2nd mAGCF；

2nd mAGCF notifies that the 2nd MGW is wireless side application context and terminal, according to the meeting of the first terminal received Words description protocol information is applied for the second terminal to the first MGW, returned to the first mAGCF in the context for wireless side application Success response message is returned, carries the information of session description protocol of second terminal；

First mAGCF notifies the first MGW to change original user and call according to the information of session description protocol of second terminal Context end points, establish inter-office switchover carrying.

Further, the above method also has following feature：First mAGCF and the 2nd mAGCF establishes inter-office switchover Carrying includes：

2nd mAGCF notifies that the second WMG (MGW) is wireless side application context and terminal, for wireless side application Context in application to the first MGW second terminal, to the first mAGCF return success response message, carry second terminal Information of session description protocol；

First mAGCF notifies the first MGW in original user's call context, according to the meeting of the second terminal received Words description protocol information establishes the first terminal to the 2nd MGW, and the information of session description protocol of first terminal is sent into second mAGCF；

2nd mAGCF notifies the 2nd MGW to be revised as wireless side application according to the information of session description protocol of first terminal Context end points, establish inter-office switchover carrying.

Further, the above method also has following feature：

The request header field and support header field of the SIP INVITE messages carry switching instruction, source Mobile Station International ISDN Number first MAGCF mobile switching center number, destination number are the 2nd mAGCF mobile switching center number,

Increase by one is used for the content type field for carrying E mouth MAP handover request message in the SIP INVITE messages；Or Person, the E mouths MAP handover request message is encapsulated in extensible markup language application field.

Further, the above method also has following feature：First mAGCF notifies the first radio network controller will User is switched to after the second wireless network controller of the 2nd mAGCF management, in addition to：

After first mAGCF receives the 2nd mAGCF handoff completion message, chain of command and user plane mouth release command are sent The Radio Resource that the original call of message informing wireless side release takes.

Further, the above method also has following feature：First mAGCF notifies the first radio network controller will User is switched to after the second wireless network controller of the 2nd mAGCF management, in addition to：

First mAGCF cancels message by SIP after user's communication terminates or the mAGCF of SIP bye message notifications the 2nd is tied Beam switches.

Further, the above method also has following feature：First mAGCF notifies the first radio network controller will User is switched to after the second wireless network controller of the 2nd mAGCF management, in addition to：

First mAGCF receives the SIP INFO messages for carrying the follow-up handover requests of E mouths MAP of the 2nd mAGCF transmissions Afterwards, after notifying the first radio network controller to prepare the Radio Resource of switching, send follow-up handoff response to the 2nd mAGCF and disappear Breath；

After first mAGCF receives the handoff completion message of the first radio network controller, before notifying the 2nd mAGCF to discharge The terminal resource of secondary switching distribution.

Further, the above method also has following feature：First mAGCF notifies the first radio network controller will User is switched to after the second wireless network controller of the 2nd mAGCF management, in addition to：

First mAGCF receives the SIP INFO messages for carrying the follow-up handover requests of E mouths MAP of the 2nd mAGCF transmissions Afterwards, the follow-up handover requests of the E mouths MAP are encapsulated in SIP INVITE messages, are then sent to the 3rd mAGCF；

After first mAGCF receives the preparation switching response message of the 3rd mAGCF returns, notify that the 2nd mAGCF is cut Change；

First mAGCF and the 3rd mAGCF establishes inter-office switchover carrying；

After first mAGCF receives the 3rd mAGCF preparation handoff completion message, notify that release is corresponding by the 2nd mAGCF Media resource.

In order to solve the above problems, present invention also offers a kind of Mobile Access Gateway control function entity (mAGCF), bag Include：

First module, after receiving the handover request message from wireless side, send Session initiation Protocol (SIP) and build Vertical session request (INVITE) message to first object mAGCF, the SIP INVITE messages carries E mouth MAPs (MAP) handover request message；

Second module, for receive first object mAGCF SIP encapsulate MAP switching response messages after, with the first mesh Mark mAGCF establishes inter-office switchover carrying；

3rd module, after the MAP that the SIP for receiving first object mAGCF is encapsulated prepares switching ready message, notice User is switched to the second wireless network controller of first object mAGCF controls by the first radio network controller.

Further, above-mentioned mAGCF also has following feature：

The request header field and support header field of the SIP INVITE messages carry switching instruction, and source Mobile Station International ISDN Number is this mAGCF Mobile switching center number, destination number be first object mAGCF mobile switching center number,

Increase by one is used for the content type field for carrying E mouth MAP handover request message in the SIP INVITE messages；Or Person, the E mouths MAP handover request message is encapsulated in extensible markup language application field.

Further, above-mentioned mAGCF also has following feature：Also include：

4th module, after the handoff completion message for receiving first object mAGCF, send chain of command and user plane mouth The Radio Resource that the original call of release command message notice wireless side release takes.

Further, above-mentioned mAGCF also has following feature：Also include：

5th module, for after user's communication terminates, cancelling message or the mesh of SIP bye message notifications first by SIP Mark mAGCF terminates to switch.

Further, above-mentioned mAGCF also has following feature：Also include：

6th module, for receiving the SIP for carrying the follow-up handover requests of E mouths MAP of first object mAGCF transmissions After INFO message, the first radio network controller is notified to prepare the Radio Resource of switching, after then being sent to first object mAGCF Continuous switching response message；

7th module, after the handoff completion message for receiving the first radio network controller, notify first object The terminal resource of the previous switching distribution of mAGCF releases.

Further, above-mentioned mAGCF also has following feature：Also include：

8th module, for receiving the SIP for carrying the follow-up handover requests of E mouths MAP of first object mAGCF transmissions After INFO message, the follow-up handover requests of the E mouths MAP are encapsulated in SIP INVITE messages, are then sent to the second target mAGCF；

9th module, for receive the second target mAGCF return preparation switching response message after, notify first object MAGCF is switched over；And establish inter-office switchover carrying with the second target mAGCF；

Tenth module, after the preparation handoff completion message for receiving the second target mAGCF, notify first object MAGCF discharges corresponding media resource.

To sum up, the present invention provides the switching method and mAGCF in a kind of DSN, it is possible to achieve mAGCF interoffices are cut in DSN domains Change of current journey.

Brief description of the drawings

Fig. 1 is distributed business network system architecture diagram.

Fig. 2 is the mAGCF inter-office switchover flow charts of the embodiment of the present invention one.

Fig. 3 is the mAGCF inter-office switchover flow charts of the embodiment of the present invention two.

Fig. 4 is the mAGCF inter-office switchover flow charts of the embodiment of the present invention three.

Fig. 5 is the mAGCF inter-office switchover flow charts of the embodiment of the present invention four.

Fig. 6 is the mAGCF of embodiment of the present invention schematic diagram.

Embodiment

For the object, technical solutions and advantages of the present invention are more clearly understood, below in conjunction with accompanying drawing to the present invention Embodiment be described in detail.It should be noted that in the case where not conflicting, in the embodiment and embodiment in the application Feature can mutually be combined.

Fig. 2 is the flow chart of the mAGCF inter-office switchovers of the embodiment of the present invention one, is comprised the following steps：

Step 201, switching source RNC-A transmission Iu mouth handover request message (Iu-Relocation-Require) is cut Change source mAGCF-A；

Step 202, switch source mAGCF-A and E interface MAP message (MAP-Prep-Handover Req, is prepared into switching Request message) it is encapsulated in SIP INVITE messages, it is sent to target side mAGCF-B；

Require (request), Supported (support) header field all carry HO (HandOver, switching) in INVITE message Indicate, the number in FORM (source), TO (target) is respectively source mAGCF-A MSCNumber (MSC number) and target side MAGCF-B MSCNumber, carrying information is not carried, while in order to transmit E interface MAP message, expansible sip message, increase E interface MAP message is encapsulated in application/xml by Content-type (content type) such as application/map In (extensible markup language application field), with special label such as<map-info></map-info>Indicate MAP message；

Step 203, mAGCF-B receives the SIP INVITE with handover request (MAP-Prep-Handover Req) and disappeared Breath, send Iu mouth handover request message (Iu-Relocation-Request) and give Target RNC-B, it is desirable to for the mobile use of switching Family MS prepares Radio Resource；

Step 204, Target RNC-B completes Radio Resource preparation, gives mAGCF-B to return to Iu mouth switch acknowledgment messages (Iu- Relocation-Request Ack)；

Step 205, mAGCF-B sends encapsulation E interface MAP message and (MAP-Prep-Handover Rsp, prepares switching and ring Should) SIP 183 (call proceeding message) notice mAGCF-A；

Step 206, mAGCF-A notifies MGW (WMG)-A are established in original user's call context to arrive MGW-B Terminal (Ta), Ta SDP (Session Description Protocol) information is carried and returns to mAGCF-B in SIP UPDATE messages；

Step 207, mAGCF-B notifies that MGW-B is wireless side application context and terminal, according to the Ta information received for Application returns to SIP200 (success response message) (UPDATE) message to MGW-A terminal Tb in the context of wireless side application In give mAGCF-A, while carry Tb SDP information,

MAGCF-A notifies MGW-A to change original user's call context end points according to Tb SDP information, establishes interoffice Switching carrier；

Step 208, mAGCF-B sends SIP 180 (it is ready to prepare switching) message and gives source mAGCF-A；

Step 209, mAGCF-A gives switching command under RNC-A (Iu-Relocation-Command) message；

Step 210, handoff completion message (Iu- is passed through when the MS is successfully accessed Target RNC-B, Target RNC-B Relocation-Complete) notify mAGCF-B mobile phones to be successfully accessed；

Step 211, mAGCF-B sends (INVITE) message of SIP 200 and gives source mAGCF-A, while is also sealed in the message Dress represents the MAP message (Map-Send-End-Signal Req) that switching is completed；

Step 212, mAGCF-A returns to SIP ACK messages and gives step mAGCF-B；

Step 213, mAGCF-A sends Iu mouths release command message (Iu-Release-Command) notice RNC-A releases The Radio Resource that originally call takes；

Step 214, end of conversation, the SIP that mAGCF-A passes through encapsulating MAP message (Map-Send-End-Signal Rsp) BYE message informing mAGCF-B, discharge corresponding resource；

If opposite end on-hook, an end of conversation message informing mAGCF-A that opposite end is sent is had, during local terminal on-hook, mAGCF-B MAGCF-A is notified using the SIP INFO of encapsulation E interface MAP_PROCESS_ACCESS_SIGNALLING message.

Optionally, after initiating switching, before end of conversation, for the Iu mouth message between RNC and mAGCF, mAGCF-A and MAGCF-B carries out message transmission using the SIP INFO of encapsulation E interface MAP (MAP) message；

Optionally, before mAGCF-A receives 200, abnormal, mAGCF-A transmission Cancel (cancellation message) end switchings occur, After mAGCF-A receives 200, BYE (byebye message) can be used to terminate switching for mAGCF-A and mAGCF-B；

Fig. 3 is the flow chart of the mAGCF inter-office switchovers of the embodiment of the present invention two, is comprised the following steps：

Step 301, switching source RNC-A transmission Iu mouth handover request message (Iu-Relocation-Require) is cut Source mAGCF-A is changed,

Step 302, E interface MAP message (MAP-Prep-Handover Req) is encapsulated in SIP by switching source mAGCF-A In INVITE message, target side mAGCF-B is sent to；

Require, Suppotred header field carry HO and indicated in INVITE message, and the number in FORM, TO is source MAGCF-A and target side mAGCF-B MSCNumber, carrying information is not carried, while in order to transmit E interface MAP message, can Sip message is extended, increases Content-type such as application/map or is encapsulated in application/xml, with spy Different label is such as<map-info></map-info>Indicate MAP message；

Step 303, mAGCF-B receives the SIP INVITE messages with handover information, sends Iu mouth handover request message Give Target RNC-B, it is desirable to prepare Radio Resource for the mobile subscriber MS of switching；

Step 304, Target RNC-B completes Radio Resource preparation, gives mAGCF-B to return to Iu mouth switch acknowledgment messages；

Step 305, the SIP 183 of mAGCF-B transmission encapsulation E interface MAP messages (MAP-Prep-Handover Rsp) disappears Breath notice mAGCF-A；

Step 306, mAGCF-B notifies that MGW-B is wireless side application context and terminal, above and below for wireless side application Tb SDP information is carried to MGW-A terminal Tb and returns to mAGCF-A in SIP UPDATE messages by application in text；

Step 307, mAGCF-A notifies MGW-A is established in original user's call context according to the Tb received to arrive MGW-B terminal Ta, Ta SDP information is carried and returns to mAGCF-B in SIP 200 (UPDATE) message；

MAGCF-B notifies MGW-B to be revised as the context end points of wireless side application, inter-office switchover according to Ta SDP information Carrying is established；

Step 308, mAGCF-B sends the message of SIP 180 and gives source mAGCF-A；

Step 309, mAGCF-A gives switching command under RNC-A (Iu-Relocation-Command) message；

Step 310, when the MS is successfully accessed, Target RNC-B passes through handoff completion message Iu-Relocation- Complete notice mAGCF-B mobile phones are successfully accessed；

Step 311, mAGCF-B sends (INVITE) message of SIP 200 and gives source mAGCF-A, while is also sealed in the message Dress represents the MAP message (Map-Send-End-Signal Req) that switching is completed；

Step 312, mAGCF-A returns to SIP ACK messages to mAGCF-B；

Step 313, the original call occupancy of mAGCF-A transmissions Iu-Release-Command notices RNC-A releases is wireless Resource；

Step 314, end of conversation, the SIP that mAGCF-A passes through encapsulating MAP message (Map-Send-End-Signal Rsp) BYE message informing mAGCF-B, discharge corresponding resource；

Optionally, after initiating switching, before end of conversation, for the Iu mouth message between RNC and mAGCF, mAGCF-A and MAGCF-B carries out message transmission using the SIP INFO of encapsulation E interface MAP message；

Optionally, before mAGCF-A receives 200, exception occurs, mAGCF-A, which sends Cancel, to be terminated to switch, and mAGCF-A is received To after 200, BYE can be used to terminate to switch for mAGCF-A and mAGCF-B.

Fig. 4 is the flow chart of the follow-up switchback of mAGCF inter-office switchovers of the embodiment of the present invention three, is comprised the following steps：

Step 401, RNC-B sends Iu mouth handover request message Iu-Relocation-Require to mAGCF-B；

Step 402, mAGCF-B is by E interface MAP message (MAP-Prep-Sub-Handover Req, follow-up handover request) It is encapsulated in SIP INFO (information) message, is sent to mAGCF-A,

Require, Suppotred header field carry HO and indicated in INFO message, and the number in FORM, TO is source mAGCF- B and target side mAGCF-A MSCNumber, MAP message are encapsulated as described in step 202；

Step 403, mAGCF-A receives the SIP INFO messages with follow-up handover information, and analysis To header field, which is the discovery that, to be cut Return, send Iu mouth handover request message (Iu-Relocation-Request) and give Target RNC-A ', it is desirable to for the mobile use of switching Family MS prepares Radio Resource；

Step 404, Target RNC-A ' completes Radio Resource preparation, gives mAGCF-A to return to Iu mouth switch acknowledgment messages (Iu- Relocation-Request Ack)；

Step 405, mAGCF-A sends the SIP of encapsulation E interface MAP message (MAP-Prep-Sub-Handover Rsp) 200 (INFO) message informing mAGCF-B；

Step 406, mAGCF-B gives switching command under RNC-B (Iu-Relocation-Command) message；

Step 407, handoff completion message (Iu- is passed through when the MS is successfully accessed Target RNC-A ' Target RNC-A ' Relocation-Complete) notify mAGCF-A mobile phones to be successfully accessed；

Step 408, the SIP BYE message that mAGCF-A passes through encapsulating MAP message (Map-Send-End-Signal Rsp) MAGCF-B is notified, discharges the media resource of previous switching distribution；

Step 409, the original call occupancy of mAGCF-B transmissions Iu-Release-Command notices RNC-B releases is wireless Resource；

Step 410, mAGCF-B sends SIP 200 (BYE) notice mAGCF-A, and release is completed.

Fig. 5 is that the mAGCF inter-office switchovers of the embodiment of the present invention four subsequently switch to third-party flow chart, including following step Suddenly：

Step 501, RNC-B sends Iu mouth handover request message (Iu-Relocation-Require) and gives mAGCF-B,

Step 502, E interface MAP message (MAP-Prep-Sub-Handover Req) is encapsulated in SIP by mAGCF-B In INFO message, mAGCF-A is sent to, while in order to transmit E interface MAP message, expansible sip message, increase Content- Type such as application/map are encapsulated in application/xml, with special label such as<map-info></ map-info>Indicate MAP message；

Step 503, E interface MAP message (MAP-Prep-Handover Req) is encapsulated in SIP INVITE by mAGCF-A In message, mAGCF-B ＇ are sent to, Require, Suppotred header field carrying HO are indicated in INVITE message, in FORM, TO Number is mAGCF-A and mAGCF-B ＇ MSCNumber, does not carry carrying information；

Step 504, mAGCF-B ＇ receive the SIP INVITE messages with handover information, send Iu mouth handover request message (Iu-Relocation-Request) Target RNC-B ＇ are given, it is desirable to prepare Radio Resource for the mobile subscriber MS of switching；

Step 505, Target RNC-B ＇ complete Radio Resource preparation, give mAGCF-B ＇ to return to Iu mouth switch acknowledgment messages (Iu- Relocation-Request Ack)；

Step 506, mAGCF-B ＇ send the SIP 183 of encapsulation E interface MAP message (MAP-Prep-Handover Rsp) Message informing mAGCF-A；

Step 507, mAGCF-A sends the SIP of encapsulation E interface MAP message (MAP-Prep-Sub-Handover Rsp) 200 (INFO) message give source mAGCF-B；

Step 508, mAGCF-B is to switching command Iu-Relocation-Command message under RNC-B；

Step 509, mAGCF-A notifies MGW-A to establish the terminal to MGW-B ＇ in original user's call context Ta ＇, Ta ＇ SDP information is carried mAGCF-B ＇ are returned in SIP UPDATE messages；

Step 510, mAGCF-B ＇ notify that MGW-B ＇ are wireless side application context and terminal, according to the Ta ＇ information received Application is returned and given in SIP 200 (UPDATE) message to MGW-A terminal Tb ＇ in the context for wireless side application MAGCF-A, while Tb SDP information is carried, mAGCF-A notifies MGW-A to change original user and exhale according to Tb ＇ SDP information Hereafter end points is called, establishes inter-office switchover carrying；

Step 511, handoff completion message Iu- is passed through when the MS is successfully accessed Target RNC-B ＇, Target RNC-B ＇ Relocation-Complete notice mAGCF-B ＇ mobile phones are successfully accessed；

Step 512, mAGCF-B ＇ send SIP 200 (INVITE) message to mAGCF-A, while also encapsulate generation in the message The MAP message (Map-Send-End-Signal Req) that table switching is completed；

Step 513, mAGCF-A returns to SIP ACK messages and gives mAGCF-B ＇；

Step 514, the SIP BYE message that mAGCF-A passes through encapsulating MAP message (Map-Send-End-Signal Rsp) MAGCF-B is notified, discharges corresponding media resource；

Step 515, mAGCF-B sends (BYE) message of SIP 200 to mAGCF-A,

Step 516, the original call occupancy of mAGCF-B transmissions Iu-Release-Command notices RNC-B releases is wireless Resource；

Step 517, end of conversation, the SIP that mAGCF-A passes through encapsulating MAP message (Map-Send-End-Signal Rsp) BYE message informing mAGCF-B ＇, discharge corresponding resource.

Fig. 6 is the mAGCF of embodiment of the present invention schematic diagram, as shown in fig. 6, the mAGCF of the present embodiment includes：

First module, after receiving the handover request message from wireless side, send Session initiation Protocol (SIP) and invite Please for (INVITE) message to first object mAGCF, the SIP INVITE messages carry E mouths MAP (MAP) switching Request message；

Second module, for receive first object mAGCF SIP encapsulate MAP switching response messages after, with the first mesh Mark mAGCF establishes inter-office switchover carrying；

3rd module, after the MAP that the SIP for receiving first object mAGCF is encapsulated prepares handoff completion message, notice User is switched to the second wireless network controller of first object mAGCF controls by the first radio network controller.

Wherein, the request header field of the SIP INVITE messages and support header field carry switching instruction, and source Mobile Station International ISDN Number is this MAGCF mobile switching center number, destination number are first object mAGCF mobile switching center number,

Increase by one is used for the content type field for carrying E mouth MAP handover request message in the SIP INVITE messages；Or Person, the E mouths MAP handover request message is encapsulated in extensible markup language application field.

In a preferred embodiment, the mAGCF can also include：

4th module, after the handoff completion message for receiving first object mAGCF, send chain of command and user plane mouth The Radio Resource that the original call of release command message notice wireless side release takes.

In a preferred embodiment, the mAGCF can also include：

5th module, for after user's communication terminates, cancelling message or the mesh of SIP bye message notifications first by SIP Mark mAGCF terminates to switch.

In a preferred embodiment, the mAGCF can also include：

6th module, for receiving the SIP for carrying the follow-up handover requests of E mouths MAP of first object mAGCF transmissions After INFO message, the first radio network controller is notified to prepare the Radio Resource of switching, after then being sent to first object mAGCF Continuous switching response message；

7th module, after the handoff completion message for receiving the first radio network controller, notify first object The terminal resource of the previous switching distribution of mAGCF releases.

In a preferred embodiment, the mAGCF can also include：

8th module, for receiving the SIP for carrying the follow-up handover requests of E mouths MAP of first object mAGCF transmissions After INFO message, the follow-up handover requests of the E mouths MAP are encapsulated in SIP INVITE messages, are then sent to the second target mAGCF；

9th module, for receive the second target mAGCF return preparation switching response message after, notify first object MAGCF is switched over；And establish inter-office switchover carrying with the second target mAGCF；

Tenth module, after the preparation handoff completion message for receiving the second target mAGCF, notify first object MAGCF discharges corresponding media resource.

One of ordinary skill in the art will appreciate that all or part of step in the above method can be instructed by program Related hardware is completed, and described program can be stored in computer-readable recording medium, such as read-only storage, disk or CD Deng.Alternatively, all or part of step of above-described embodiment can also be realized using one or more integrated circuits.Accordingly Ground, each module/unit in above-described embodiment can be realized in the form of hardware, can also use the shape of software function module Formula is realized.The present invention is not restricted to the combination of the hardware and software of any particular form.

The preferred embodiments of the present invention are these are only, certainly, the present invention can also there are other various embodiments, without departing substantially from this In the case of spirit and its essence, those skilled in the art work as can make various corresponding changes according to the present invention And deformation, but these corresponding changes and deformation should all belong to the protection domain of appended claims of the invention.

Claims (14)

1. the switching method in a kind of distributed business network, including：

After first Mobile Access Gateway control function entity (mAGCF) receives the handover request message from wireless side, send Session initiation Protocol (SIP) invites (INVITE) message, and to the 2nd mAGCF, the SIP INVITE messages carry the movement of E mouths should With part (MAP) handover request message；

After first mAGCF receives the 2nd mAGCF MAP switching response messages of SIP encapsulation, interoffice is established with the 2nd mAGCF Switching carrier；

The MAP that first mAGCF receives the 2nd mAGCF SIP encapsulation prepares after switching ready message, notifies the first wireless network User is switched to the second wireless network controller of the 2nd mAGCF controls by controller.

2. the method as described in claim 1, it is characterised in that：First mAGCF establishes inter-office switchover with the 2nd mAGCF and held Load includes：

It is corresponding to the 2nd mAGCF that first mAGCF notifies that the first WMG (MGW) is established in original user's call context The 2nd MGW first terminal, the information of session description protocol of first terminal is sent to the 2nd mAGCF；

2nd mAGCF notifies that the 2nd MGW is wireless side application context and terminal, is retouched according to the session of the first terminal received Protocol information is stated in the context for wireless side application, applies for the second terminal to the first MGW, to the first mAGCF return into Work(response message, carry the information of session description protocol of second terminal；

First mAGCF notifies the first MGW to change original user and call up and down according to the information of session description protocol of second terminal Literary end points, establish inter-office switchover carrying.

3. the method as described in claim 1, it is characterised in that：First mAGCF establishes inter-office switchover with the 2nd mAGCF and held Load includes：

2nd mAGCF notifies that the second WMG (MGW) is wireless side application context and terminal, for the upper of wireless side application Hereinafter apply for the second terminal to the first MGW, return to success response message to the first mAGCF, carry the session of second terminal Protocol information is described；

First mAGCF notifies the first MGW in original user's call context, is retouched according to the session of the second terminal received Protocol information foundation is stated to the 2nd MGW first terminal, the information of session description protocol of first terminal is sent to second mAGCF；

2nd mAGCF notifies the 2nd MGW to be revised as the upper and lower of wireless side application according to the information of session description protocol of first terminal Literary end points, establish inter-office switchover carrying.

4. the method as described in claim any one of 1-3, it is characterised in that：

The request header field and support header field of the SIP INVITE messages carry switching instruction, and source Mobile Station International ISDN Number is the first mAGCF's Mobile switching center number, destination number are the 2nd mAGCF mobile switching center number,

Increase by one is used for the content type field for carrying E mouth MAP handover request message in the SIP INVITE messages；Or The E mouths MAP handover request message is encapsulated in extensible markup language application field.

5. the method as described in claim any one of 1-3, it is characterised in that：First mAGCF notifies the first wireless network User is switched to after the second wireless network controller of the 2nd mAGCF management by controller, in addition to：

After first mAGCF receives the 2nd mAGCF handoff completion message, chain of command and user plane mouth release command message are sent The Radio Resource for notifying the original call of wireless side release to take.

6. the method as described in claim any one of 1-3, it is characterised in that：First mAGCF notifies the first wireless network User is switched to after the second wireless network controller of the 2nd mAGCF management by controller, in addition to：

First mAGCF cancels message by SIP after user's communication terminates or the mAGCF of SIP bye message notifications the 2nd terminates to cut Change.

7. the method as described in claim any one of 1-3, it is characterised in that：First mAGCF notifies the first wireless network User is switched to after the second wireless network controller of the 2nd mAGCF management by controller, in addition to：

After first mAGCF receives the SIP INFO messages for carrying the follow-up handover requests of E mouths MAP of the 2nd mAGCF transmissions, lead to After knowing the Radio Resource that the first radio network controller prepares switching, follow-up switching response message is sent to the 2nd mAGCF；

After first mAGCF receives the handoff completion message of the first radio network controller, notify the 2nd mAGCF releases are previous to cut Change the terminal resource of distribution.

8. the method as described in claim any one of 1-3, it is characterised in that：First mAGCF notifies the first wireless network User is switched to after the second wireless network controller of the 2nd mAGCF management by controller, in addition to：

, will after first mAGCF receives the SIP INFO messages for carrying the follow-up handover requests of E mouths MAP of the 2nd mAGCF transmissions The follow-up handover requests of the E mouths MAP are encapsulated in SIP INVITE messages, are then sent to the 3rd mAGCF；

After first mAGCF receives the preparation switching response message of the 3rd mAGCF returns, the 2nd mAGCF is notified to switch over；

First mAGCF and the 3rd mAGCF establishes inter-office switchover carrying；

After first mAGCF receives the 3rd mAGCF preparation handoff completion message, the 2nd mAGCF is notified to discharge corresponding media Resource.

9. a kind of Mobile Access Gateway control function entity (mAGCF), including：

First module, after receiving the handover request message from wireless side, send Session initiation Protocol (SIP) and establish meeting Words request (INVITE) message to first object mAGCF, the SIP INVITE messages carries E mouths MAP (MAP) Handover request message；

Second module, for receive first object mAGCF SIP encapsulate MAP switching response messages after, with first object MAGCF establishes inter-office switchover carrying；

3rd module, after the MAP that the SIP for receiving first object mAGCF is encapsulated prepares switching ready message, notify first User is switched to the second wireless network controller of first object mAGCF controls by radio network controller.

10. mAGCF as claimed in claim 9, it is characterised in that

The request header field and support header field of the SIP INVITE messages carry switching instruction, and source Mobile Station International ISDN Number is this mAGCF shifting Dynamic switching centre number, destination number are first object mAGCF mobile switching center number,

Increase by one is used for the content type field for carrying E mouth MAP handover request message in the SIP INVITE messages；Or The E mouths MAP handover request message is encapsulated in extensible markup language application field.

11. the mAGCF as described in claim 9 or 10, it is characterised in that also include：

4th module, after the handoff completion message for receiving first object mAGCF, send chain of command and the release of user plane mouth The Radio Resource that the original call of command messages notice wireless side release takes.

12. the mAGCF as described in claim 9 or 10, it is characterised in that also include：

5th module, for after user's communication terminates, cancelling message or SIP bye message notification first objects by SIP MAGCF terminates to switch.

13. the mAGCF as described in claim 9 or 10, it is characterised in that also include：

6th module, for receiving the SIP INFO for carrying the follow-up handover requests of E mouths MAP of first object mAGCF transmissions After message, notify the first radio network controller to prepare the Radio Resource of switching, then send to first object mAGCF and subsequently cut Change response message；

7th module, after the handoff completion message for receiving the first radio network controller, notice first object mAGCF is released Put the terminal resource of previous switching distribution.

14. the mAGCF as described in claim 9 or 10, it is characterised in that also include：

8th module, for receiving the SIP INFO for carrying the follow-up handover requests of E mouths MAP of first object mAGCF transmissions After message, the follow-up handover requests of the E mouths MAP are encapsulated in SIP INVITE messages, are then sent to the second target mAGCF；

9th module, for receive the second target mAGCF return preparation switching response message after, notify first object MAGCF is switched over；And establish inter-office switchover carrying with the second target mAGCF；

Tenth module, after the preparation handoff completion message for receiving the second target mAGCF, notice first object mAGCF is released Put corresponding media resource.