CN1882175A

CN1882175A - Wireless switching method and system

Info

Publication number: CN1882175A
Application number: CNA2005101034985A
Authority: CN
Inventors: 刘文宇; 尤昉; 徐杰; 魏华; 李岩
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2005-09-19
Filing date: 2005-09-19
Publication date: 2006-12-20
Anticipated expiration: 2025-09-19
Also published as: CN100456883C; WO2007033565A1

Abstract

The invention relates to a wireless switch method, for solving the problem of present technique that realizing switch without the load information on the opposite terminal in the refresh conversation, wherein the method comprises: A, the original access network uses switch control logic solid to initialize switch to the target access network, while not carrying the load information of opposite terminal; B, the switch control logic solid uses the load information of target terminal to initialize the load refresh to the opposite one; C, the solid uses the feedback load information to initialize load refresh to the target access network, to complete the switch. The invention discloses another two wireless switching methods, relative control logic solid, and switching system.

Description

Wireless switching method and system

Technical field

The present invention relates to field of wireless, particularly relate to wireless switching method, wireless switch control logic entity and wireless switched system.

Background technology

Existing intra-office changing method referring to shown in Figure 1, comprises the following steps:

-former side joint is gone into network and is initiated handover request;

-mobile services switching centre (MSC) is initiated handoff request to the destination access network;

-destination access network feeds back switching authentic to MSC after setting up air traffic channel;

-MSC goes into network to former side joint and initiates switching command;

-former side joint is gone into the network feedback and is switched beginning;

-when wireless switch to destination channel after, the destination access network initiate to switch to MSC finishes indication;

-MSC removes the channel that former side joint is gone into network.

Existing inter-office switchover method referring to shown in Figure 2, comprises the following steps:

The flow process of-inter-office switchover on MSC and access network interface switched identical with intra-office;

-interoffice is by MAP signaling exchange handover relevant information;

-after former side MSC receives handover request, initiate handoff request to destination MSC;

-destination MSC returns switching request response to former side MSC behind the switching authentic of receiving the destination access network;

-after destination MSC receives that switching is finished, finish by the former side MSC switching of MSONCH message informing.

But at present also do not realize the method switched by the beared information of opposite end in the new session more.

At present also not by the SIP signaling finish session Central Plains side joint go into network with switch between the destination access network alternately, realize the method for switching.

Summary of the invention

The invention provides wireless switching method, be used for solving at present not by the beared information of new session opposite end more and realize the problem switched.Further finishing session Central Plains side joint by the SIP signaling goes into network and switches mutual between the destination access network.

The present invention provides a kind of wireless switching method again, is used to solve at present not to finish session Central Plains side joint by the SIP signaling and go into the problem that realizing alternately between network and the switching destination access network switched.

The present invention also provides a kind of switch control logic entity, is used to support the inventive method.

The present invention provides a kind of switched system again, is used to support the inventive method.

The inventive method comprises the following steps:

A, session Central Plains side joint networking ruton are crossed the switch control logic entity and are initiated to switch to switching the destination access network, and do not carry the beared information of opposite end in the session;

B, switch control logic entity are initiated bearer update to switch destination beared information opposite end in described session;

C, switch control logic entity are initiated bearer update with the beared information of opposite end feedback in the session to switching the destination access network, finish switching.

Switching the destination beared information described in the step B is after initiating switching, feeds back to described switch control logic entity by switching the destination access network.

The entity of switch control logic described in the step B is initiated bearer update by session layer with SIP signaling opposite end in session.

Described in the step B in the session opposite end feed back in this session opposite end current beared information with the SIP signaling to the switch control logic entity by session layer.

Described session Central Plains side joint is gone into network and is switched the destination Access Network in same switch control logic entity coverage.

Described steps A comprises the following steps:

-former side joint is gone into network and is initiated handoff request to the switch control logic entity;

-switch control logic entity is transmitted this handoff request to the destination access network;

After-destination access network is set up the channel of eating dishes without rice or wine, confirm to switch control logic entity feedback handoff request;

-switch control logic entity is gone into network to former side joint and is initiated switching command;

-former side joint is gone into network and is informed that the switching of switch control logic entity begins.

Described step B comprises the following steps:

Bearer update is initiated in-switch control logic entity opposite end in session;

Opposite end feedback bearer update result in the-session;

-switch control logic entity responds described bearer update result.

Described step C comprises the following steps:

-switch control logic entity is initiated bearer update with the beared information of opposite end feedback in the session to switching the destination access network;

-switching destination access network feedback upgrades the result;

-subscriber equipment is finished and is eated dishes without rice or wine to switch, and finishes in the switching of switching destination access network feedback.

Also comprise that step: D, switch control logic entity after switch operating is finished, remove former side channel after the described step C.

Described step D comprises the following steps:

-finish switch operating after, the switch control logic entity initiate to be removed former side channel;

-session Central Plains side joint is gone into network after former side channel removing is finished, and removes to switch control logic entity feedback and finishes message.

Described session Central Plains side joint is gone into network and is switched the destination Access Network respectively in different switch control logic entity coverages.

Transmit handover information by the SIP signaling between former side switch control logic entity and the destination switch control logic entity.

Described step B comprises the following steps:

Bearer update is initiated in-former side switch control logic entity opposite end in session;

Opposite end feedback bearer update result in the-session;

-former side switch control logic entity responds described bearer update result.

Described steps A comprises the following steps:

-session Central Plains side joint is gone into network and is initiated handoff request to former side switch control logic entity;

-former side switch control logic entity is transmitted described initiation handoff request to destination switch control logic entity;

-destination switch control logic entity is transmitted described initiation handoff request to switching the destination access network;

After-switching destination access network is set up the channel of eating dishes without rice or wine, confirm to destination switch control logic entity feedback handoff request;

-destination switch control logic entity informs that former side switch control logic physical channel sets up;

-former side switch control logic entity is gone into network to session Central Plains side joint and is initiated switching command;

-session Central Plains side joint is gone into network and is informed that former side switch control logic entity switching begins.

Described step C comprises the following steps:

-former side switch control logic entity is initiated bearer update with the beared information of opposite end feedback in the session to destination switch control logic entity;

-destination switch control logic entity is responded described bearer update request;

-destination switch control logic entity is transmitted described bearer update request to switching the destination access network;

After-switching destination access network carries out bearer update, to destination switch control logic entity feedback bearer update result;

-subscriber equipment is switching the destination access network to destination switch control logic entity feedback handoff completion message;

-destination switch control logic entity is informed former side switch control logic entity, and the user has finished switching;

-former side switch control logic entity is responded to destination switch control logic entity and has been known to switch and finish.

Described steps A comprises the following steps:

-former side switch control logic entity switches destination access network address to the inquiry of destination switch control logic entity;

-destination switch control logic entity switches destination access network address to former side switch control logic entity feedback;

-former side switch control logic entity is initiated handoff request to switching the destination access network;

After-switching destination access network is set up the channel of eating dishes without rice or wine, confirm to former side switch control logic entity feedback handoff request;

Described step C comprises the following steps:

-former side switch control logic entity is initiated bearer update with the beared information of opposite end feedback in the session to switching the destination access network;

After-switching destination access network carries out bearer update, to former side switch control logic entity feedback bearer update result;

-subscriber equipment is switching the destination access network to former side switch control logic entity feedback handoff completion message.

Described step D comprises the following steps:

-finish switch operating after, former side switch control logic entity initiates to remove former side channel;

-session Central Plains side joint is gone into network after former side channel removing is finished, and removes to former side switch control logic entity feedback and finishes message.

After the described step D, when the user operated at switching destination access network, destination switch control logic entity was by SIP signaling and former side switch control logic entity interaction.

The another kind of wireless switching method of the present invention comprises the following steps:

A, cross the switch control logic entity at session Central Plains side joint networking ruton and initiate to switch, and carry the beared information that described session Central Plains side joint is gone into opposite end in the session that network preserves to switching the destination access network;

B, switch control logic entity are initiated bearer update to switch destination beared information opposite end in described session, finish switching.

Among the described step B, after bearer update was initiated in opposite end in session, to go into the beared information of opposite end in the session that network preserves identical with described session Central Plains side joint for the current beared information of judging opposite end feedback in the session, as if identical, then finishes switching; Otherwise the switch control logic entity is initiated bearer update with the current beared information of opposite end feedback in the session to switching the destination access network, finishes switching.

Described steps A comprises the following steps:

-former side joint is gone into network and is initiated handoff request to the switch control logic entity, and carries the beared information that described session Central Plains side joint is gone into opposite end in the session of network preservation in this request;

After-switching destination access network is set up the channel of eating dishes without rice or wine, confirm to switch control logic entity feedback handoff request;

Described step B comprises the following steps:

Opposite end feedback bearer update result in the-session, and carry the current beared information in opposite end in this session;

-switch control logic entity responds described bearer update result;

To go into the beared information of opposite end in the session that network preserves identical with described session Central Plains side joint for the-current beared information of judging the feedback of opposite end in the described session, if identical, then finishes switching;

Otherwise the switch control logic entity is initiated bearer update with the current beared information of opposite end feedback in the described session to switching the destination access network;

-switching destination access network feedback upgrades the result;

Also comprise step after the described step B:

C, switch control logic entity are removed former side channel after switch operating is finished.

Described step C comprises the following steps:

-described session Central Plains side joint is gone into network and is switched the destination access network respectively in different switch control logic entity coverages.

Transmit handover information by the SIP signaling between-former side switch control logic entity and the destination switch control logic entity.

Described steps A comprises the following steps:

-session Central Plains side joint is gone into network and is initiated handoff request to former side switch control logic entity, and carries the beared information that described session Central Plains side joint is gone into opposite end in the session of network preservation in this request;

Described step B comprises the following steps:

-former side switch control logic entity responds described bearer update result;

Otherwise former side switch control logic entity is initiated bearer update with the current beared information of opposite end feedback in the described session to destination switch control logic entity;

-destination switch control logic entity upgrades the result to former side switch control logic entity feedback;

-destination switch control logic entity is informed former side switch control logic entity, and the user has finished switching.

Described steps A comprises the following steps:

-former side switch control logic entity is initiated handoff request to switching the destination access network, and carries the beared information that described session Central Plains side joint is gone into opposite end in the session of network preservation in this request;

Described step B comprises the following steps:

Otherwise former side switch control logic entity is initiated the bearer update request with the current beared information of opposite end feedback in the described session to switching the destination access network;

-switching the destination access network upgrades the result to former side switch control logic entity feedback;

Also comprise that step: C, switch control logic entity after switch operating is finished, remove former side channel after the described step B.

Described step C comprises the following steps:

-session Central Plains side joint is gone into network after former side channel removing is finished, and removes to former side switch control logic entity feedback and finishes message;

-former side switch control logic entity is informed destination switch control logic entity, and former side channel is removed.

After the described step C, when the user operated at switching destination access network, destination switch control logic entity was by SIP signaling and former side switch control logic entity interaction.

Another wireless switching method of the present invention comprises the following steps:

A, session Central Plains side joint networking ruton are crossed the switch control logic entity and initiate to be switched with the SIP signaling, and former side switch control logic entity and destination switch control logic entity increase end points respectively on its corresponding media gateway MGW;

B, former side switch control logic entity are revised as the end points that destination switch control logic entity increases with the end points of its increase, finish switching;

After C, destination switch control logic entity were finished by the switching of the former side switch control logic of SIP signaled entity, former side switch control logic entity was by the SIP signaling response.

Described steps A comprises the following steps:

-former side switch control logic entity increases end points on former side MGW;

-former side MGW feeds back the beared information of this end points;

-former side switch control logic entity is transmitted described initiation handoff request by the SIP signaling to destination switch control logic entity;

-destination switch control logic entity increases end points on destination MGW;

-destination MGW feeds back the beared information of this end points;

-destination switch control logic entity is set up by the former side switch control logic of SIP signaled physical channel, and at described beared information of informing the end points that carries the destination increase in the message;

Described step B comprises the following steps:

-former side switch control logic entity is according to the beared information of the end points of destination increase, and the end points that former side is increased is revised as the destination end points;

-former side MGW revises the result to former side switch control logic entity feedback.

Described step C comprises the following steps:

-destination switch control logic entity is by the former side switch control logic of SIP signaled entity, and the user has finished switching;

-former side switch control logic entity sends to destination switch control logic entity by the SIP signaling has known handoff completion message.

Described step D comprises the following steps:

-former side switch control logic entity initiates to remove former side channel;

-former side switch control logic entity is deleted the session Central Plains side point among the former side MGW;

-former side MGW is to former side switch control logic entity feedback deletion result.

The invention provides a kind of wireless switch control logic entity, comprising:

Circuit domain hand off signaling processing module is used for the hand off signaling of processing circuit domain access network;

The bearer update module is used for initiating bearer update to the session opposite end;

The inter-office switchover signaling processing module can be consulted handover information by SIP signaling and switching destination device;

The switch control logic module is used for control circuit territory hand off signaling processing module, bearer update module and interoffice hand off signaling processing module, finishes switching.

Described inter-office switchover signaling processing module also can identify to described destination device search purposes side radio access network entity by the SIP signaling.

Described is by newly-increased SIP signaling bear handover information by SIP signaling and destination device negotiation handover information, perhaps carries handover information by the field in the expansion SIP signaling, perhaps directly uses original SIP signaling bear handover information.

Described entity also comprises:

The media gateway controlling module, it links to each other with described switch control logic module, is used to control media gateway, makes media gateway finish former side joint according to the instruction of this module and goes into network, switches the carrying exchange between destination access network and the core network.

The invention provides a kind of wireless switched system, comprising: IMS network and circuit domain access network;

At least one switch control logic entity is connected between described IMS network and the circuit domain access network, is used for mutual handover information.

Mutual by the handover information that Session Initiation Protocol is finished between described switch control logic entity and the IMS network.

If former side with switch destination not in same switch control logic entity coverage, continuous between the then described former side switch control logic entity corresponding respectively with switching destination.

The described former side switch control logic entity corresponding respectively with switching destination is continuous by the inter-office switchover signaling processing module of described switch control logic entity inside.

The described former side switch control logic entity corresponding respectively with switching destination passes through SIP Signalling exchange information.

Described system also comprises: media gateway, it links to each other with described switch control logic entity, be used to receive the control command that the media gateway controlling module is sent in the described switch control logic entity, to finish former side, to switch the carrying exchange between destination and the core network.

Beneficial effect of the present invention is as follows:

The inventive method is finished session Central Plains side joint by the SIP signaling and is gone into network and switch mutual between the destination access network, and initiates bearer update by session layer with SIP signaling opposite end in session, finishes switching.

The present invention's another kind method is finished session Central Plains side joint by the SIP signaling and is gone into network and switch mutual between the destination access network, and then finishes switching by the end points that change increases on media gateway.

The invention provides a kind of wireless switch control logic entity, be used to support the inventive method.It comprises: circuit domain hand off signaling processing module is used for the hand off signaling of processing circuit domain access network; The bearer update module is used for initiating bearer update to the session opposite end; The inter-office switchover signaling processing module can be consulted handover information by SIP signaling and switching destination device; The switch control logic module is used for control circuit territory hand off signaling processing module, bearer update module and interoffice hand off signaling processing module, finishes switching.

The invention provides a kind of wireless switched system, be used to support the inventive method.Added at least one above-mentioned switch control logic entity in native system, it is connected between described IMS network and the circuit domain access network, is used for mutual handover information.The handover information that native system is finished between described switch control logic entity and the IMS network by Session Initiation Protocol is mutual, and then realizes the bearer update to opposite end in the session.And former side with switch destination not in same switch control logic entity coverage the time, finish former side and switch destination and distinguish information interaction between the corresponding switch control logic entity by the SIP signaling.

Description of drawings

Fig. 1 is the intra-office hand off signaling flow chart of prior art;

Fig. 2 is the inter-office switchover signaling process figure of prior art;

When initiating to upgrade for the present invention, do not carry Fig. 3 the flow chart of steps of beared information mode;

When initiating to upgrade for the present invention, do not carry Fig. 4 the intra-office hand off signaling flow chart of beared information mode;

When initiating to upgrade for the present invention, do not carry Fig. 5 the inter-office switchover signaling process figure of beared information mode;

Do not carry beared information when Fig. 6 initiates to upgrade for the present invention and finish inter-office switchover signaling process figure with inquiry mode;

Fig. 7 carries the flow chart of steps of beared information mode when initiating to upgrade for the present invention;

Fig. 8 carries the inter-office switchover signaling process figure of beared information mode when initiating to upgrade for the present invention;

Fig. 9 increases end points for the present invention on media gateway method is finished the signaling process figure of inter-office switchover;

Figure 10 is a logic entity schematic diagram of the present invention;

Figure 11 is a system schematic of the present invention.

Embodiment

In order to realize switching by the beared information of opposite end in the new session more, the invention provides two kinds of wireless switching methods, when initiating to switch, do not carry the beared information of opposite end in the session and the mode of carrying described beared information based on former side respectively.

Below two kinds of methods are lifted three examples respectively.

When initiate switching, do not carry the method for loading information of opposite end in the session based on former side,, comprise the following steps: referring to shown in Figure 3

S1-1, session Central Plains side joint are gone into network and are initiated switching to the switch control logic entity, do not carry the beared information of opposite end in the session;

S1-2, switch control logic entity are initiated handoff request to switching the destination access network;

S1-3, switching destination access network are set up the channel of eating dishes without rice or wine, and are fed back to the switch control logic entity;

S1-4, switch control logic entity inform that session Central Plains side joint goes into network and switch the destination channel and set up, and begin to switch;

S1-5, switch control logic entity are initiated bearer update to switch destination beared information opposite end in session;

S1-6, switch control logic entity are initiated bearer update with the beared information of opposite end feedback in the session to switching the destination access network;

S1-7, switching destination access network are received the portable terminal handoff completion message, notice switch control logic entity;

S1-8, remove former channel.

Example one: intra-office switches.Be that session Central Plains side joint is gone into network and switched the destination access network in same switch control logic entity coverage.

Referring to shown in Figure 4, comprise following concrete signaling.

S1-101, session Central Plains side joint are gone into network and are initiated switching to the switch control logic entity, do not carry the beared information of opposite end in the session.(HANDOFF?REQUIRED)

S1-102 switch control logic entity is initiated handoff request to switching the destination access network.(HANDOFF?REQUEST)

S1-103, switching destination access network are set up the channel of eating dishes without rice or wine, and are fed back to the switch control logic entity; And the beared information that in described feedback message, carries the switching destination.(HANDOFF?REQUESTACK)

S1-104, switch control logic entity inform that session Central Plains side joint goes into network and switch the destination channel and set up, and begin to switch.

-switch control logic entity is gone into network to session Central Plains side joint and is initiated switching command; (HANDOFFCOMMAND)

-session Central Plains side joint is gone into network and is informed that the switching of switch control logic entity begins.(HANDOFFCOMMANCE)

S1-105, switch control logic entity are initiated bearer update to switch destination beared information opposite end in session.

The beared information that-switch control logic entity will switch destination is bundled in the SIP signaling, initiates bearer update by session layer (P-CSCF CSCF agent entity) opposite end in session; (SIP:reINVITE (SDP-T))

The opposite end is fed back the bearer update result by session layer with the SIP signaling in the-session; And in described bearer update result, carry the current beared information in opposite end in this session.(SIP：200?OK(SDP-S))

-switch control logic entity responds described bearer update result.(SIP：ACK)

S1-106, switch control logic entity are initiated bearer update with the beared information of opposite end feedback in the session to switching the destination access network.

The beared information that-switch control logic entity is sent according to opposite end in the session upgrades the beared information that switches the destination access network; (BEARER UPD REQUEST (SDP-S))

After the renewal work of-switching destination access network is finished, upgrade the result to switch control logic entity feedback; (BEARER UPD RESPONSE)

S1-107, switching destination access network are received the portable terminal handoff completion message, notice switch control logic entity.(HANDOFF?COMPLETE)

S1-108, remove former channel.

-switch control logic entity is gone into network to session Central Plains side joint and is initiated to remove former side channel; (CLEARCOMMAND)

-session Central Plains side joint is gone into network after former side channel removing is finished, and removes to switch control logic entity feedback and finishes message.(CLEAR?COMPLETE)

Example two: the inter-office switchover of non-inquiry mode.Described inter-office switchover is that session Central Plains side joint is gone into network and switched the destination access network respectively in different switch control logic entity coverages.

Referring to shown in Figure 5, comprise following concrete signaling.

S1-201, session Central Plains side joint are gone into network and are initiated handoff request to former side switch control logic entity, do not carry the beared information of opposite end in the session.(HANDOFF?REQUIRED)

S1-202, switch control logic entity are initiated handoff request to switching the destination access network.

-former side switch control logic entity is transmitted described initiation handoff request by the SIP signaling to destination switch control logic entity; (SIP:INVITE (HANDOFF REQUIRED))

-destination switch control logic entity is transmitted described handoff request to switching the destination access network; (HANDOFF REQUEST)

S1-203, switching destination access network are set up the channel of eating dishes without rice or wine, and are fed back to the switch control logic entity.

After-switching destination access network is set up the channel of eating dishes without rice or wine, confirm to destination switch control logic entity feedback handoff request; And the beared information that in described feedback message, carries the switching destination; (HANDOFF REQUEST ACK)

-destination switch control logic entity is set up by the former side switch control logic of SIP signaled physical channel, and carries the beared information that switches destination.(SIP：183(SDP-T)HANDOFFREQUEST?ACK)

S1-204, switch control logic entity inform that session Central Plains side joint goes into network and switch the destination channel and set up, and begin to switch.

-former side switch control logic entity is gone into network to session Central Plains side joint and is initiated switching command; (HANDOFF COMMAND)

-session Central Plains side joint is gone into network and is informed that former side switch control logic entity switching begins; (HANDOFF COMMANCE)

S1-205, switch control logic entity are initiated bearer update to switch destination beared information opposite end in session.

-beared information that former side switch control logic entity will switch destination is bundled in the SIP signaling, initiates bearer update by session layer (P-CSCF CSCF agent entity) opposite end in session; (SIP:reINVITE (SDP-T))

The opposite end is fed back the bearer update result by session layer with the SIP signaling in the-session; And in described bearer update result, carry the current beared information in opposite end in this session; (SIP:200 OK (SDP-S))

-former side switch control logic entity is by the described bearer update result of SIP signaling response; (SIP:ACK)

S1-206, switch control logic entity are initiated bearer update with the beared information of opposite end feedback in the session to switching the destination access network.

-former side switch control logic entity sends the bearer update request by the SIP signaling to destination switch control logic entity, and carries the current beared information in opposite end in the described session in this request message; (SIP:PRACK (SDP-S))

-destination switch control logic entity feeds back to former side switch control logic entity by the SIP signaling; (SIP:200 OK)

-destination switch control logic entity is transmitted described bearer update request to switching the destination access network; (BEARER UPD REQUEST)

After-switching destination access network carries out bearer update with the current beared information in opposite end in the session, to destination switch control logic entity feedback bearer update result.(BEARER?UPD?RESPONSE)

S1-207, switching destination access network are received the portable terminal handoff completion message, notice switch control logic entity.

-subscriber equipment is switching the destination access network to destination switch control logic entity feedback handoff completion message; (HANDOFF COMPLETE)

-destination switch control logic entity is by the former side switch control logic of SIP signaled entity, and the user has finished switching; (SIP:200 OK)

-former side switch control logic entity feeds back to destination switch control logic entity by the SIP signaling.(SIP：200?OK?ACK)

S1-208, remove former channel.

-finish switch operating after, former side switch control logic entity initiates to remove former side channel; (CLEARCOMMAND)

-session Central Plains side joint is gone into network after former side channel removing is finished, and removes to former side switch control logic entity feedback and finishes message; (CLEAR COMPLETE)

-former side switch control logic entity is by SIP signaled destination switch control logic entity, and former side channel is removed.

Afterwards, if the user is when switching destination access network is operated, destination switch control logic entity is by SIP signaling and former side switch control logic entity interaction.

Example three: the inter-office switchover of inquiry mode.

Referring to shown in Figure 6, comprise following concrete signaling.

S1-301, session Central Plains side joint are gone into network and are initiated handoff request to former side switch control logic entity.(HANDOFF?REQUIRED)

S1-302, switch control logic entity are initiated handoff request to switching the destination access network.

-former side switch control logic entity switches destination access network address by the SIP signaling to the inquiry of destination switch control logic entity; (SIP:MESSAGE (CILIST))

-destination switch control logic entity switches destination access network address by the SIP signaling to former side switch control logic entity feedback; (SIP:200 OK (BSC-CILIST))

-according to switching destination access network address, former side switch control logic entity is initiated handoff request to switching the destination access network, does not carry the beared information of opposite end in the session.(HANDOFF?REQUEST)

After S1-303, switching destination access network are set up the channel of eating dishes without rice or wine, confirm to former side switch control logic entity feedback handoff request; And the beared information that in described feedback message, carries the switching destination.(HANDOFF?REQUEST?ACK)

S1-304, switch control logic entity inform that session Central Plains side joint goes into network and switch the destination channel and set up, and begin to switch.

-session Central Plains side joint is gone into network and is informed that former side switch control logic entity switching begins.(HANDOFF?COMMANCE)

S1-305 is identical with above-mentioned S1-205.(SIP：reINVITE(SDP-T))(SIP：200?OK

(SDP-S))(SIP：ACK)

S1-306, switch control logic entity are initiated bearer update with the beared information of opposite end feedback in the session to switching the destination access network.

-former side switch control logic entity is directly initiated bearer update to switching the destination access network according to switching destination access network address with the beared information of opposite end feedback in the session; (BEARER UPDREQUEST (SDP-S))

-switch the destination access network with after carrying out bearer update, to former side switch control logic entity feedback bearer update result.(BEARER?UPD?RESPONSE)

S1-307, switching destination access network are received the portable terminal handoff completion message, notice switch control logic entity.

-subscriber equipment is switching the destination access network to former side switch control logic entity feedback handoff completion message.(HANDOFF?COMPLETE)

S1-308 is identical with above-mentioned S1-208.(CLEAR?COMMAND)(CLEAR?COMPLETE)

When initiate switching, carry the method for loading information of opposite end in the session based on former side,, comprise the following steps: referring to shown in Figure 7

S2-1, session Central Plains side joint are gone into network and are initiated switching to the switch control logic entity, carry the beared information of opposite end in the session;

S2-2, switch control logic entity are initiated handoff request to switching the destination access network;

S2-3, switching destination access network are set up the channel of eating dishes without rice or wine, and are fed back to the switch control logic entity;

S2-4, switch control logic entity inform that session Central Plains side joint goes into network and switch the destination channel and set up, and begin to switch;

S2-5, switch control logic entity are initiated bearer update to switch destination beared information opposite end in session;

Whether the beared information of opposite end is identical with the beared information of opposite end feedback in the session in the session of S2-6, the more former storage of switch control logic entity, if identical, then changes S2-8 over to; If different, then change S2-7 over to.

S2-7, switch control logic entity are initiated bearer update with the beared information of opposite end feedback in the session to switching the destination access network;

S2-8, switching destination access network are received the portable terminal handoff completion message, notice switch control logic entity;

S2-9, remove former channel.

Example four: intra-office switches.

S2-401, former side joint are gone into network and are initiated handoff request to the switch control logic entity, and carry the beared information that described session Central Plains side joint is gone into opposite end in the session of network preservation in this request.

S2-402, switch control logic entity are initiated handoff request to switching the destination access network.

After S2-403, switching destination access network are set up the channel of eating dishes without rice or wine, confirm to switch control logic entity feedback handoff request; And the beared information that in described feedback message, carries the switching destination.

S2-404, switch control logic entity inform that session Central Plains side joint goes into network and switch the destination channel and set up, and begin to switch.

S2-405, switch control logic entity are initiated bearer update to switch destination beared information opposite end in session.

The beared information that-switch control logic entity will switch destination is bundled in the SIP signaling, initiates bearer update by session layer (P-CSCF CSCF agent entity) opposite end in session;

The opposite end is fed back the bearer update result by session layer with the SIP signaling in the-session; And in described bearer update result, carry the current beared information in opposite end in this session;

-switch control logic entity responds described bearer update result.

Whether the beared information that S2-406, the more described session of switch control logic entity Central Plains side joint are gone into opposite end in the session that network preserves is identical with the current beared information of opposite end feedback in the described session, if identical, then changes S2-408 over to; If different, then change S2-407 over to.

S2-407, switch control logic entity are initiated bearer update with the beared information of opposite end feedback in the described session to switching the destination access network; And

Switch destination access network feedback and upgrade the result.

S2-408, switching destination access network are received the portable terminal handoff completion message, notice switch control logic entity.

S2-409, remove former channel.

-switch control logic entity is gone into network to session Central Plains side joint and is initiated to remove former side channel;

Example five: the inter-office switchover of non-inquiry mode.

Referring to shown in Figure 8, comprise following concrete signaling.

S2-501, session Central Plains side joint are gone into network and are initiated handoff request to former side switch control logic entity, and carry the beared information that described session Central Plains side joint is gone into opposite end in the session of network preservation in this request.(HANDOFF?REQUIRED)

S2-502, switch control logic entity are initiated handoff request to switching the destination access network.

-former side switch control logic entity is transmitted described initiation handoff request by the SIP signaling to destination switch control logic entity; (SIP:INVITE (SDP-S) (HANDOFF REQUIRED))

-destination switch control logic entity is transmitted described initiation handoff request to switching the destination access network.(HANDOFF?REQUEST)

S2-503, switching destination access network are set up the channel of eating dishes without rice or wine, and are fed back to the switch control logic entity.

-destination switch control logic entity is set up by the former side switch control logic of SIP signaled physical channel; And carry the beared information of described switching destination.(SIP：180(SDP-T)HANDOFFREQUEST?ACK)

S2-504, switch control logic entity inform that session Central Plains side joint goes into network and switch the destination channel and set up, and begin to switch.

-former side switch control logic entity feeds back PRACK (this step is the step of Session Initiation Protocol regulation) by the SIP signaling to destination switch control logic entity; (SIP:PRACK)

-destination switch control logic entity is by SIP signaling response 200OK (this step is the step of Session Initiation Protocol regulation).(SIP：200?OK)

S2-505, switch control logic entity are initiated bearer update to switch destination beared information opposite end in session.

The opposite end is fed back the bearer update result by session layer with the SIP signaling in the-session; And in described bearer update result, carry the current beared information in opposite end in this session.(SIP：200?OK(SDP-S′))

Whether the beared information that S2-506, the more described session of former side switch control logic entity Central Plains side joint are gone into opposite end in the session that network preserves is identical with the current beared information of opposite end feedback in the described session, if identical, then changes S2-508 over to; If different, then change S2-507 over to.

S2-507, switch control logic entity are initiated bearer update with the beared information of opposite end feedback in the described session to switching the destination access network.

-former side switch control logic entity is initiated bearer update by the SIP signaling to destination switch control logic entity with the current beared information of opposite end feedback in the session; (13.SIP:UPDATE (SDP-S '))

-destination switch control logic entity is transmitted described bearer update request to switching the destination access network; (1 4.BEARER UPD REQUEST (SDP-S '))

After-switching destination access network carries out bearer update, to destination switch control logic entity feedback bearer update result; (15.BEARER UPD RESPONSE)

-destination switch control logic entity upgrades the result by the SIP signaling to former side switch control logic entity feedback.(16.SIP：200?OK(SDP-T))

S2-508, switching destination access network are received the portable terminal handoff completion message, notice switch control logic entity.

-subscriber equipment is switching the destination access network to destination switch control logic entity feedback handoff completion message; (17.HANDOFF COMPLETE)

-destination switch control logic entity is by the former side switch control logic of SIP signaled entity, and the user has finished switching.(18.SIP：200?OK)

-former side switch control logic entity feeds back to destination switch control logic entity by the SIP signaling.(21.SIP：200?OK?ACK)

S2-509, remove former channel.

-former side switch control logic entity initiates to remove former side channel; (19.CLEAR COMMAND)

-session Central Plains side joint is gone into network after former side channel removing is finished, and removes to former side switch control logic entity feedback and finishes message; (20.CLEAR COMPLETE)

Example six: the inter-office switchover of inquiry mode.

S2-601, session Central Plains side joint are gone into network and are initiated handoff request to former side switch control logic entity.

S2-602, switch control logic entity are initiated handoff request to switching the destination access network.

-former side switch control logic entity switches destination access network address by the SIP signaling to the inquiry of destination switch control logic entity;

-destination switch control logic entity switches destination access network address by the SIP signaling to former side switch control logic entity feedback;

-according to switching destination access network address, former side switch control logic entity is initiated handoff request to switching the destination access network, and carries the beared information that described session Central Plains side joint is gone into opposite end in the session of network preservation.

After S1-603, switching destination access network are set up the channel of eating dishes without rice or wine, confirm to former side switch control logic entity feedback handoff request; And the beared information that in described feedback message, carries the switching destination.

S1-604, switch control logic entity inform that session Central Plains side joint goes into network and switch the destination channel and set up, and begin to switch.

S2-605, switch control logic entity are initiated bearer update to switch destination beared information opposite end in session.

-beared information that former side switch control logic entity will switch destination is bundled in the SIP signaling, initiates bearer update by session layer (P-CSCF CSCF agent entity) opposite end in session;

The opposite end is fed back the bearer update result by session layer with the SIP signaling in the-session; And in described bearer update result, carry the current beared information in opposite end in this session.

Whether the beared information that S2-606, the more described session of former side switch control logic entity Central Plains side joint are gone into opposite end in the session that network preserves is identical with the current beared information of opposite end feedback in the described session, if identical, then changes S2-608 over to; If different, then change S2-607 over to.

S2-607, switch control logic entity are initiated bearer update with the beared information of opposite end feedback in the described session to switching the destination access network.

-former side switch control logic entity is directly initiated bearer update to switching the destination access network according to switching destination access network address with the beared information of opposite end feedback in the session;

-switch the destination access network with after carrying out bearer update, to former side switch control logic entity feedback bearer update result.

S2-608, switching destination access network are received the portable terminal handoff completion message, notice switch control logic entity.

S2-609, remove former channel.

To informing destination switch control logic entity, remove by former side channel by the SIP signaling for-former side switch control logic entity.

The invention provides another kind of method.Finish mutual between former side and the destination by the SIP signaling.

Further on its corresponding MGW, increase end points respectively, and when switching, change end points, realize the switching of portable terminal by former side switch control logic entity and destination switch control logic entity.

Referring to shown in Figure 9, comprise the following steps:

S3-1, session Central Plains side joint networking ruton are crossed the switch control logic entity and initiate to be switched with the SIP signaling, and former side switch control logic entity and destination switch control logic entity increase end points respectively on its corresponding MGW.

-session Central Plains side joint is gone into network and is initiated handoff request to former side switch control logic entity; (HANDOFF REQUIRED)

-former side switch control logic entity increases end points on former side MGW; (ADD ($4))

-former side MGW feeds back the beared information of this end points; (REPLAY (SDP-4))

-former side switch control logic entity is transmitted described initiation handoff request by the SIP signaling to destination switch control logic entity; (SIP:INVITE (SDP-4) HANDOFF REQUIRED)

-destination switch control logic entity is transmitted described initiation handoff request to switching the destination access network; (HANDOFF REQUEST)

-destination switch control logic entity increases end points on destination MGW; (ADD ($5REMOTE=SDP-4))

-destination MGW feeds back the beared information of this end points; (REPLY (SDP-5))

After-switching destination access network is set up the channel of eating dishes without rice or wine, confirm to destination switch control logic entity feedback handoff request; (HANDOFF REQUEST ACK)

-destination switch control logic entity is set up by the former side switch control logic of SIP signaled physical channel, and at described beared information of informing the end points that carries the destination increase in the message.(SIP：183(SDP-5)HANDOFF?REQUEST?ACK)

S3-2, switch control logic entity inform that session Central Plains side joint goes into network and switch the destination channel and set up, and begin to switch.

S3-3, former side switch control logic entity are revised as the end points that destination switch control logic entity increases with the end points of its increase.

-former side switch control logic entity is according to the beared information of the end points of destination increase, and the end points that former side is increased is revised as the destination end points; (MODIFY ($4REMOTE=SDP-5))

-former side MGW revises the result to former side switch control logic entity feedback.(REPLAY)

After S3-4, destination switch control logic entity were finished by the switching of the former side switch control logic of SIP signaled entity, former side switch control logic entity was by the SIP signaling response.

-former side switch control logic entity sends to destination switch control logic entity by the SIP signaling has known handoff completion message.(SIP：ACK)

S3-5, remove former channel.

-former side switch control logic entity initiates to remove former side channel; (CLEAR COMMAND)

-former side switch control logic entity is deleted the former side point of switching among the former side MGW; (SUBSTRACT)

-former side MGW is to former side switch control logic entity feedback deletion result.(REPLY)

In order to support the inventive method, the invention provides a kind of switch control logic entity, referring to shown in Figure 10, it comprises: the circuit domain hand off signaling processing module, bearer update module, inter-office switchover signaling processing module and the media gateway controlling module that link to each other with the switch control logic module respectively.

Described circuit domain hand off signaling processing module is used for the hand off signaling of processing circuit domain access network.

Described bearer update module is used for initiating bearer update to the session opposite end.

Described inter-office switchover signaling processing module can be consulted handover information by SIP signaling and switching destination device.Also can perhaps carry handover information, perhaps directly use original SIP signaling bear handover information, identify to destination device search purposes side radio access network entity by newly-increased SIP signaling bear handover information by the field in the expansion SIP signaling.

Described media gateway controlling module is used to control media gateway, makes media gateway finish former side joint according to the instruction of this module and goes into network, switches the carrying exchange between destination access network and the core network.

Described switch control logic module is used for control circuit territory hand off signaling processing module, bearer update module, inter-office switchover signaling processing module and media gateway controlling module, finishes switching.

In order to support the inventive method, the invention provides a kind of switched system, referring to shown in Figure 11, it comprises:

IMS network, circuit domain access network and media gateway, and the switch control logic entity that is connected with them respectively.

Circuit domain hand off signaling processing module in the described switch control logic entity links to each other with described circuit domain access network; Bearer update module in the described switch control logic entity links to each other with described IMS network; Media gateway controlling module in the described switch control logic entity links to each other with described media gateway.

Described system comprises a switch control logic entity at least, and is mutual by the beared information that Session Initiation Protocol is finished between described switch control logic entity and the IMS network.

If former side and switching destination be not in same switch control logic entity coverage, then described former side and switch a destination corresponding switch control logic entity respectively, and the described former side switch control logic entity corresponding respectively with switching destination is continuous by the inter-office switchover signaling processing module of described switch control logic entity inside.The described so former side switch control logic entity corresponding respectively with switching destination can pass through SIP Signalling exchange handover information.

Described media gateway is used to receive the control command that the media gateway controlling module is sent in the described switch control logic entity, to finish former side, to switch the carrying exchange between destination and the core network.

Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.

Claims

1, a kind of wireless switching method is characterized in that, comprises the following steps:

2, the method for claim 1 is characterized in that, switching the destination beared information described in the step B is after initiating switching, feeds back to described switch control logic entity by switching the destination access network.

3, method as claimed in claim 2 is characterized in that, the entity of switch control logic described in the step B is initiated bearer update by session layer with SIP signaling opposite end in session.

4, method as claimed in claim 3 is characterized in that, described in the step B in the session opposite end feed back in this session opposite end current beared information with the SIP signaling to the switch control logic entity by session layer.

5, method as claimed in claim 4 is characterized in that, described session Central Plains side joint is gone into network and switched the destination Access Network in same switch control logic entity coverage.

6, method as claimed in claim 5 is characterized in that, described steps A comprises the following steps:

7, method as claimed in claim 6 is characterized in that, described step B comprises the following steps:

Opposite end feedback bearer update result in the-session;

-switch control logic entity responds described bearer update result.

8, method as claimed in claim 7 is characterized in that, described step C comprises the following steps:

-switching destination access network feedback upgrades the result;

9, method as claimed in claim 8 is characterized in that, also comprises step after the described step C:

D, switch control logic entity are removed former side channel after switch operating is finished.

10, method as claimed in claim 9 is characterized in that, described step D comprises the following steps:

11, method as claimed in claim 4 is characterized in that, described session Central Plains side joint is gone into network and switched the destination Access Network respectively in different switch control logic entity coverages.

12, method as claimed in claim 11 is characterized in that, transmits handover information by the SIP signaling between former side switch control logic entity and the destination switch control logic entity.

13, method as claimed in claim 12 is characterized in that, described step B comprises the following steps:

Opposite end feedback bearer update result in the-session;

14, method as claimed in claim 13 is characterized in that, described steps A comprises the following steps:

15, method as claimed in claim 14 is characterized in that, described step C comprises the following steps:

16, method as claimed in claim 13 is characterized in that, described steps A comprises the following steps:

17, method as claimed in claim 16 is characterized in that, described step C comprises the following steps:

18, as claim 15 or 17 described methods, it is characterized in that, also comprise step after the described step C:

19, method as claimed in claim 18 is characterized in that, described step D comprises the following steps:

20, method as claimed in claim 19 is characterized in that, after the described step D, when the user operated at switching destination access network, destination switch control logic entity was by SIP signaling and former side switch control logic entity interaction.

21, a kind of wireless switching method is characterized in that, comprises the following steps:

22, method as claimed in claim 21, it is characterized in that, among the described step B, after bearer update is initiated in opposite end in session, to go into the beared information of opposite end in the session that network preserves identical with described session Central Plains side joint for the current beared information of judging the feedback of opposite end in the session, if identical, then finish switching;

Otherwise the switch control logic entity is initiated bearer update with the current beared information of opposite end feedback in the session to switching the destination access network, finishes switching.

23, method as claimed in claim 22 is characterized in that, switching the destination beared information described in the step B is after initiating switching, feeds back to described switch control logic entity by switching the destination access network.

24, method as claimed in claim 23 is characterized in that, the entity of switch control logic described in the step B is initiated bearer update by session layer with SIP signaling opposite end in session.

25, method as claimed in claim 24 is characterized in that, described in the step B in the session opposite end feed back in this session opposite end current beared information with the SIP signaling to the switch control logic entity by session layer.

26, method as claimed in claim 25 is characterized in that, described session Central Plains side joint is gone into network and switched the destination Access Network in same switch control logic entity coverage.

27, method as claimed in claim 26 is characterized in that, described steps A comprises the following steps:

28, method as claimed in claim 27 is characterized in that, described step B comprises the following steps:

-switch control logic entity responds described bearer update result;

-switching destination access network feedback upgrades the result;

29, method as claimed in claim 28 is characterized in that, also comprises step after the described step B:

30, method as claimed in claim 29 is characterized in that, described step C comprises the following steps:

31, method as claimed in claim 25 is characterized in that, described session Central Plains side joint is gone into network and switched the destination access network respectively in different switch control logic entity coverages.

32, method as claimed in claim 31 is characterized in that, transmits handover information by the SIP signaling between former side switch control logic entity and the destination switch control logic entity.

33, method as claimed in claim 32 is characterized in that, described steps A comprises the following steps:

34, method as claimed in claim 33 is characterized in that, described step B comprises the following steps:

35, method as claimed in claim 32 is characterized in that, described steps A comprises the following steps:

36, method as claimed in claim 35 is characterized in that, described step B comprises the following steps:

37, as claim 34 or 36 described methods, it is characterized in that, also comprise that step: C, switch control logic entity after switch operating is finished, remove former side channel after the described step B.

38, method as claimed in claim 37 is characterized in that, described step C comprises the following steps:

39, method as claimed in claim 38 is characterized in that, after the described step C, when the user operated at switching destination access network, destination switch control logic entity was by SIP signaling and former side switch control logic entity interaction.

40, a kind of wireless switching method is characterized in that, comprises the following steps:

41, method as claimed in claim 40 is characterized in that, described steps A comprises the following steps:

-former side MGW feeds back the beared information of this end points;

-destination MGW feeds back the beared information of this end points;

42, method as claimed in claim 41 is characterized in that, described step B comprises the following steps:

43, method as claimed in claim 42 is characterized in that, described step C comprises the following steps:

44, method as claimed in claim 43 is characterized in that, also comprises that step: D, switch control logic entity after switch operating is finished, remove former side channel after the described step C.

45, method as claimed in claim 44 is characterized in that, described step D comprises the following steps:

46, method as claimed in claim 45 is characterized in that, after the described step D, when the user operated at switching destination access network, destination switch control logic entity was by SIP signaling and former side switch control logic entity interaction.

47, a kind of wireless switch control logic entity is characterized in that, comprising:

48, logic entity as claimed in claim 47 is characterized in that, described inter-office switchover signaling processing module also can identify to described destination device search purposes side radio access network entity by the SIP signaling.

49, as claim 47 or 48 described logic entities, it is characterized in that, described is by the newly-increased cell carrying handover information of SIP signaling by SIP signaling and destination device negotiation handover information, perhaps carry handover information, perhaps directly use the cell carrying handover information in original SIP signaling by the cell in the expansion SIP signaling.

50, logic entity as claimed in claim 49 is characterized in that, described logic entity also comprises:

51, a kind of wireless switched system comprises: IMS network and circuit domain access network,

It is characterized in that described system also comprises:

52, system as claimed in claim 51 is characterized in that, the beared information that described system finishes between described switch control logic entity and the IMS network by Session Initiation Protocol is mutual.

53, system as claimed in claim 52 is characterized in that, if former side with switch destination not in same switch control logic entity coverage, continuous between the then described former side switch control logic entity corresponding respectively with switching destination.

54, system as claimed in claim 53 is characterized in that, the described former side switch control logic entity corresponding respectively with switching destination is continuous by the inter-office switchover signaling processing module of described switch control logic entity inside.

55, system as claimed in claim 54 is characterized in that, the described former side switch control logic entity corresponding respectively with switching destination passes through SIP Signalling exchange information.

56, system as claimed in claim 55, it is characterized in that, described system also comprises: media gateway, it links to each other with described switch control logic entity, be used to receive the control command that the media gateway controlling module is sent in the described switch control logic entity, to finish former side, to switch the carrying exchange between destination and the core network.