WO2007033565A1 - Procede et systeme de transfert sans fil - Google Patents
Procede et systeme de transfert sans fil Download PDFInfo
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- WO2007033565A1 WO2007033565A1 PCT/CN2006/001905 CN2006001905W WO2007033565A1 WO 2007033565 A1 WO2007033565 A1 WO 2007033565A1 CN 2006001905 W CN2006001905 W CN 2006001905W WO 2007033565 A1 WO2007033565 A1 WO 2007033565A1
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- WIPO (PCT)
- Prior art keywords
- handover
- control logic
- logic entity
- handover control
- access network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/34—Reselection control
Definitions
- the present invention relates to the field of wireless networks, and more particularly to a wireless handover method, a wireless handover control logic entity, and a wireless handover system.
- the existing intra-office handover method includes the following steps:
- the mobile services switching center initiates a handover request to the destination side access network
- the destination side access network establishes an over-the-air channel and feeds back the handover confirmation to the MSC;
- the MSC initiates a handover command to the primary side access network
- the destination side access network initiates a handover completion indication to the MSC; - the MSC removes the channel of the original side access network.
- the existing interoffice switching method includes the following steps:
- the original MSC After receiving the handover request, the original MSC initiates a handover request to the destination MSC;
- the MSC After receiving the handover confirmation of the access network of the destination side, the MSC returns a handover request response to the original MSC.
- the destination side MSC When the destination side MSC receives the handover, it notifies the side MSC handover through the MSONCH message.
- the present invention provides a wireless handover method for solving the problem that handover is currently not implemented by updating the bearer information of the peer in the session.
- the interaction between the primary side access network and the handover destination side access network in the session is further completed through SIP signaling.
- the present invention further provides a wireless handover method, which is used to solve the problem that the handover between the primary side access network and the handover destination side access network in the session is not realized through SIP signaling.
- the present invention also provides a handover control logic entity for supporting the method of the present invention.
- the invention further provides a switching system for supporting the method of the invention.
- the method of the invention comprises the following steps:
- the primary side access network in the session initiates the handover to the handover destination access network through the handover control logic entity, and does not carry the bearer information of the peer end in the session;
- the handover control logic entity initiates a bearer update to the peer end in the session by switching the destination side bearer information.
- the handover control logic entity initiates a bearer update to the handover destination side access network by using the bearer information fed back by the peer in the session, and completes the handover.
- the switching destination side bearer information in step B is fed back to the handover control logic entity by the handover destination side access network after the handover is initiated.
- the switching control logic entity in step B sends a bearer update to the peer end in the session through the session layer by using SIP signaling.
- the peer end feeds the current control bearer information of the peer in the session to the handover control logic entity through the session layer through SIP signaling.
- the primary side access network and the handover destination side access network in the session are within the coverage of the same handover control logical entity.
- the step A includes the following steps:
- the primary side access network initiates a handover request to the handover control logic entity
- the handover control logic entity forwards the handover request to the destination side access network; After the destination side access network establishes the air interface channel, the handover control logic entity feeds back the handover request confirmation;
- the handover control logic entity initiates a handover command to the primary side access network
- the primary side access network informs the handover control logical entity that the handover has begun.
- the step B includes the following steps:
- the handover control logic entity initiates a bearer update to the peer in the session
- the handover control logic entity responds to the bearer update result.
- the step C includes the following steps:
- the handover control logic entity initiates a bearer update to the handover destination side access network by using the bearer information fed back by the peer end in the session;
- the user equipment completes the air interface switchover, and the access network feedback switching is completed on the handover destination side.
- the step C further includes the following steps: D.
- the handover control logic entity clears the original side channel after the handover operation is completed.
- the step D includes the following steps:
- the handover control logic entity initiates clearing of the original side channel
- the original access network in the session feeds back the clear completion message to the handover control logic entity after the original channel clearing is completed.
- the primary side access network and the handover destination side access network in the session are respectively within the coverage of different handover control logic entities.
- the original side handover control logic entity and the destination side handover control logic entity transmit handover information through SIP signaling.
- the step B includes the following steps:
- the primary side handover control logic entity initiates a bearer update to the peer end in the session
- the primary side handover control logic entity responds to the bearer update result.
- the step A includes the following steps:
- the primary side access network in the session initiates a handover request to the original side handover control logic entity
- the primary side handover control logic entity forwards the originating handover request to the destination side handover control logic entity;
- the destination side handover control logic entity forwards the originating handover request to the handover destination side access network
- the handover control logic entity After switching the destination side access network to establish an air interface channel, the handover control logic entity feeds back the handover request confirmation to the destination side;
- the destination side handover control logic entity informs the primary side handover control logical entity that the channel is established; - the primary side handover control logic entity initiates a handover command to the primary side access network in the session;
- the primary side access network in the session informs the primary side handover control logical entity that the handover has begun.
- the step C includes the following steps:
- the primary side handover control logic entity initiates a bearer update to the destination side handover control logic entity by using the bearer information fed back by the peer in the session;
- the destination side handover control logic entity forwards the bearer update request to the handover destination side access network
- the handover control logic entity After switching the destination side access network to perform bearer update, the handover control logic entity returns the bearer update result to the destination side;
- the user equipment feeds back the handover completion message to the destination side handover control logic entity at the handover destination side access network;
- the destination side handover control logic entity informs the primary side handover control logic entity that the user has completed the handover; - the primary side handover control logic entity responds to the destination side handover control logic entity that the completion of the handover is known.
- the step A includes the following steps:
- the primary side access network in the session initiates a handover request to the original side handover control logic entity
- the primary side handover control logic entity queries the destination side handover control logic entity to query the handover destination side access website address;
- the primary side handover control logic entity initiates a handover request to the handover destination side access network
- the switching control request is confirmed to the original side handover control logic entity
- the primary side handover control logic entity initiates a handover command to the primary side access network in the session
- the primary side access network in the session informs the primary side handover control logical entity that the handover has begun.
- the step C includes the following steps:
- the primary side handover control logic entity initiates a bearer update to the handover destination side access network by using the bearer information fed back by the peer end in the session;
- the user equipment feeds back the handover completion message to the original side handover control logic entity at the handover destination side access network.
- the step C further includes the following steps: D.
- the handover control logic entity clears the original side channel after the handover operation is completed.
- the step D includes the following steps:
- the original side handover control logic entity initiates clearing of the original side channel
- the original side switching control logic entity feeds back the clearing completion message to the original side.
- step D when the user accesses the network to perform the operation, the destination side handover control logic entity interacts with the original side handover control logic entity through SIP signaling.
- Another wireless switching method of the present invention includes the following steps:
- the primary side access network initiates the handover by using the handover control logic entity to the handover destination side access network, and carries the bearer information of the peer end in the session saved by the original side access network in the session;
- the handover control logic entity initiates a bearer to the peer end in the session by switching the destination side bearer information. Update, complete the switch.
- step B after the bearer update is initiated to the peer in the session, it is determined whether the current bearer information fed back by the peer end in the session is the same as the bearer information of the peer end in the session saved by the original side access network in the session. Then, the handover is completed; otherwise, the handover control logic entity initiates a bearer update to the handover destination side access network by using the current bearer information fed back by the peer end in the session, and completes the handover.
- the switching destination side bearer information in step B is fed back to the handover control logic entity by the handover destination side access network after the handover is initiated.
- the switching control logic entity in step B sends a bearer update to the peer end in the session through the session layer by using SIP signaling.
- the peer end feeds the current control bearer information of the peer in the session to the handover control logic entity through the session layer through SIP signaling.
- the primary side access network and the handover destination side access network in the session are within the coverage of the same handover control logical entity.
- the step A includes the following steps:
- the primary side access network initiates a handover request to the handover control logic entity, and carries the bearer information of the peer end in the session saved by the primary side access network in the session;
- the handover control logic entity forwards the handover request to the destination side access network
- the handover control logic entity After switching the destination side access network to establish an air interface channel, the handover control logic entity feeds back the handover request confirmation;
- the handover control logic entity initiates a handover command to the primary side access network
- the primary side access network informs the handover control logical entity that the handover has begun.
- the step B includes the following steps:
- the handover control logic entity initiates a bearer update to the peer in the session
- the peer end feedback in the session carries the update result, and carries the current bearer information of the peer in the session; - the handover control logic entity responds to the bearer update result;
- the handover control logic entity initiates a bearer update to the handover destination side access network by using the current bearer information fed back by the peer end in the session;
- the step B further includes the following steps:
- the switching control logic entity clears the original side channel after the handover operation is completed.
- the step C includes the following steps:
- the handover control logic entity initiates clearing of the original side channel
- the original access network in the session feeds back the clear completion message to the handover control logic entity after the original channel clearing is completed.
- the primary side access network and the handover destination side access network in the session are respectively within the coverage of different handover control logical entities.
- the original side handover control logic entity and the destination side handover control logic entity transmit handover information through SIP signaling.
- the step A includes the following steps:
- the primary side access network in the session initiates a handover request to the primary side handover control logical entity, and carries the bearer information of the peer end in the session saved by the primary side access network in the session;
- the primary side handover control logic entity forwards the originating handover request to the destination side handover control logic entity;
- the destination side handover control logic entity forwards the originating handover request to the handover destination side access network
- the handover control logic entity After switching the destination side access network to establish an air interface channel, the handover control logic entity feeds back the handover request confirmation to the destination side;
- the destination side handover control logic entity informs the original side handover control logic entity that the channel has been established; - the primary side handover control logic entity initiates a handover command to the primary side access network in the session;
- the primary side access network in the session informs the primary side handover control logical entity that the handover has begun.
- the step B includes the following steps: - the primary side handover control logic entity initiates a bearer update to the peer end in the session;
- the peer end feedback in the session carries the update result, and carries the current bearer information of the peer in the session;
- the original side handover control logic entity responds to the bearer update result;
- the primary side handover control logic entity initiates a bearer update to the destination side handover control logic entity by using the current bearer information fed back by the peer end in the session;
- the destination side handover control logic entity forwards the bearer update request to the handover destination side access network
- the handover control logic entity After switching the destination side access network to perform bearer update, the handover control logic entity returns the bearer update result to the destination side;
- the destination side handover control logic entity feeds back the update result to the original side handover control logic entity;
- the user equipment feeds back the handover completion message to the destination side handover control logic entity at the handover destination side access network;
- the destination side handover control logic entity informs the primary side handover control logic entity that the user has completed the handover.
- the step A includes the following steps:
- the primary side access network in the session initiates a handover request to the original side handover control logic entity
- the primary side handover control logic entity queries the destination side handover control logic entity to query the handover destination side access network address;
- the primary side handover control logic entity initiates a handover request to the handover destination side access network, and carries the bearer information of the peer end in the session saved by the primary side access network in the session;
- the switching control request is confirmed to the original side handover control logic entity
- the primary side handover control logic entity initiates a handover command to the primary side access network in the session
- the primary side access network in the session informs the primary side handover control logical entity that the handover has begun.
- the step B includes the following steps:
- the primary side handover control logic entity initiates a bearer update to the peer end in the session
- the peer end feedback in the session carries the update result, and carries the current bearer information of the peer end in the session;
- the primary side handover control logic entity initiates a bearer update request to the handover destination side access network by using the current bearer information fed back by the peer end in the session;
- the user equipment feeds back the handover completion message to the original side handover control logic entity at the handover destination side access network.
- the step B further includes the following steps: C.
- the handover control logic entity clears the original side channel after the handover operation is completed.
- the step C includes the following steps:
- the original side handover control logic entity initiates clearing of the original side channel
- the original side access network in the session switches to the original side switching control logic entity to feed back the clear completion message;
- the primary side handover control logic entity informs the destination side handover control logic entity that the primary side channel has been cleared.
- the destination side handover control logic entity interacts with the original side handover control logic entity through SIP signaling.
- Another wireless switching method of the present invention includes the following steps:
- the primary side access network in the session initiates the handover by using the handover control logic entity by SIP signaling, and the primary side handover control logic entity and the destination side handover control logic entity respectively add endpoints on their corresponding media gateway MGWs;
- the original side handover control logic entity modifies the added endpoint to the endpoint added by the destination side handover control logic entity to complete the handover;
- the destination side handover control logic entity informs the original side handover control logic entity through SIP signaling
- the primary side handover control logic entity responds by SIP signaling.
- the step A includes the following steps:
- the primary side access network in the session initiates a handover request to the original side handover control logic entity
- the primary side handover control logic entity adds an endpoint on the primary side MGW
- the primary side handover control logic entity forwards the initiated handover request to the destination side handover control logic entity through SIP signaling;
- the destination side handover control logic entity forwards the originating handover request to the handover destination side access network
- the destination side handover control logic entity adds an endpoint on the destination side MGW;
- the handover control logic entity After switching the destination side access network to establish an air interface channel, the handover control logic entity feeds back the handover request confirmation to the destination side;
- the destination side handover control logic entity informs the original side handover control logic entity that the channel has been established through the SIP signaling, and carries the bearer information of the endpoint added by the destination side in the notification message;
- the primary side handover control logic entity initiates a handover command to the primary side access network in the session
- the primary side access network in the session informs the primary side handover control logical entity that the handover has begun.
- the step B includes the following steps:
- the primary side handover control logic entity modifies the endpoint added by the original side to the destination side endpoint according to the bearer information of the endpoint added by the destination side;
- the step C includes the following steps:
- the user equipment feeds back the handover completion message to the destination side handover control logic entity at the handover destination side access network;
- the destination side handover control logic entity notifies the original side handover control logic entity through SIP signaling, and the user has completed the handover;
- the primary side handover control logic entity sends the handover control logic entity to the destination side through SIP signaling.
- the switch completion message is known.
- the step C further includes the following steps: D.
- the handover control logic entity clears the original side channel after the handover operation is completed.
- the step D includes the following steps:
- the switching control logic entity returns a clearing completion message to the original side
- the primary side handover control logic entity deletes the primary side endpoint in the session in the original MGW;
- step D when the user accesses the network to perform the operation, the destination side handover control logic entity interacts with the original side handover control logic entity through SIP signaling.
- the present invention provides a wireless handover control logic entity, including:
- circuit domain switching signaling processing module configured to process switching signaling of the circuit domain access network
- bearer update module configured to initiate a bearer update to the session peer end
- the inter-office handover signaling processing module may negotiate a handover signaling control logic module by using SIP signaling and a side device that switches the PI, and is configured to control the circuit domain handover signaling processing module, the bearer update module, and the interoffice handover signaling processing module, To complete the switch.
- the inter-office handover signaling processing module may further query the destination side device for the target side radio access network entity identifier by using SIP signaling.
- the negotiation of the handover information with the destination device by using the SIP signaling is performed by the newly added SIP signaling bearer switching information, or by extending the field in the SIP signaling to carry the handover information, or directly using the original SIP signaling bearer switching information. .
- the entity also includes:
- the media gateway control module is connected to the switching control logic module, and is configured to control the media gateway, so that the media gateway can complete the bearer between the primary side access network and the destination side access network and the core network according to the instruction of the module. exchange.
- the present invention provides a wireless switching system, including: an IMS network and a circuit domain access network; at least one handover control logic entity, respectively connected between the IMS network and the circuit domain access network, for interactively switching information.
- the handover information interaction between the handover control logic entity and the IMS network is completed through the SIP protocol.
- the original side and the handover destination side are not in the same handover control logical entity coverage, the original control side and the handover control logic entity corresponding to the handover destination side are connected to each other.
- the switching control logic entity corresponding to the original side and the switched side respectively is connected by an inter-office handover signaling processing module inside the handover control logic entity.
- the switching control logic entity corresponding to the original side and the switching destination side respectively exchanges information through SIP signaling.
- the system further includes: a media gateway connected to the handover control logic entity, configured to receive a control command sent by the media gateway control module in the handover control logic entity, to complete the original side, the handover destination side, and the core network. Bearer exchange between.
- the method of the present invention completes the interaction between the primary side access network and the switching destination side access network in the session through SIP signaling, and initiates handover by using the SIP layer signaling to initiate bearer update to the peer end in the session.
- Another method of the present invention completes the interaction between the primary side access network and the handover destination side access network in the session through SIP signaling, and then completes the handover by changing the endpoints added on the media gateway.
- the present invention provides a wireless handover control logic entity for supporting the method of the present invention.
- the method includes: a circuit domain switching signaling processing module, configured to process handover signaling of the circuit domain access network; a bearer update module, configured to initiate bearer update to the session peer end; and an interoffice handover signaling processing module, which can use the SIP
- the switching information is negotiated with the switching destination side device; the switching control logic module is configured to control the circuit domain switching signaling processing module, the bearer update module, and the interoffice switching signaling processing module to complete the handover.
- the present invention provides a wireless switching system for supporting the method of the present invention.
- At least one of the above-described handover control logic entities is added to the system, which is connected to the IMS network and the circuit domain access network Between the networks, used to interactively switch information.
- the system completes the switching information interaction between the switching control logic entity and the IMS network through the SIP protocol, thereby implementing the bearer update of the peer end in the session.
- the original side and the handover destination side are not in the same handover control logic entity coverage, the information interaction between the original control side and the handover control logic entity corresponding to the handover destination side is completed by using SIP signaling.
- FIG. 1 is a flow chart of an intra-office handover signaling in the prior art
- 3 is a flow chart of steps of not carrying bearer information when initiating an update according to the present invention.
- FIG. 4 is a flow chart of intra-office handover signaling in a manner that does not carry bearer information when initiating an update according to the present invention
- FIG. 5 is a flowchart of inter-office handover signaling in a manner that does not carry bearer information when initiating an update according to the present invention. The bearer does not carry the bearer information and completes the inter-office handover signaling flowchart in a query manner;
- FIG. 7 is a flow chart of steps of carrying a bearer information when initiating an update according to the present invention.
- FIG. 8 is a flowchart of an inter-office handover signaling carrying a bearer information manner when an update is initiated according to the present invention
- FIG. 9 is a signaling flowchart of a method for adding an endpoint on a media gateway to complete an inter-office handover according to the present invention
- FIG. 11 is a schematic illustration of the system of the present invention. detailed description
- the present invention provides two methods for the wireless handover, which are based on the bearer information of the peer in the session and the manner in which the bearer information is carried.
- the method for not carrying the bearer information of the peer in the session when the original side initiates the handover, as shown in FIG. 3, includes the following steps:
- the original access network in the session initiates a handover to the handover control logical entity, and does not carry the session.
- the handover control logic entity initiates a handover request to the handover destination side access network
- Sl-3 switching the destination side access network to establish an air interface channel, and feeding back to the handover control logic entity;
- Sl-4 the handover control logic entity notifying that the original side access network handover destination side channel has been established in the session, and starting to switch;
- the handover control logic entity initiates a bearer update to the peer end in the session by switching the bearer information of the destination side;
- the handover control logic entity initiates bearer update to the handover destination side access network by using the bearer information fed back by the peer end in the session;
- the switching destination side access network receives the mobile terminal handover complete message, and notifies the handover control logic entity;
- Example 1 Intra-office handover. That is, the primary side access network and the handover destination side access network in the session are within the coverage of the same handover control logical entity.
- the primary side access network initiates a handover to the switching control logical entity, and does not carry the bearer information of the peer end in the session. ( HANDOFF REQUIRED )
- the S1-102 handover control logic entity initiates a handover request to the handover destination side access network. ( HANDOFF REQUEST )
- the Sl-103, the switching destination side access network establishes an air interface channel, and feeds back to the handover control logic entity; and carries the bearer information of the handover destination side in the feedback message. (HANDOFF REQUEST ACK )
- the handover control logic entity informs that the original side access network switching destination side channel has been established in the session, and starts to switch.
- the handover control logic entity initiates a handover command to the primary side access network in the session; (HANDOFF COMMAND)
- the primary side access network in the session informs the handover control logical entity that the handover has begun. ( HANDOFF COMMANCE )
- the Sl-105 the handover control logic entity initiates a bearer update to the peer end in the session by switching the side bearer information of the g.
- the handover control entity also packs the bearer information of the handover destination side into the SIP signaling, and initiates a bearer update to the peer end in the session through the session layer (P-CSCF call session control function proxy entity); (SIP: reINVITE (SDP- T ) )
- the peer end carries the update result by the SIP signaling feedback through the session layer; and carries the current bearer information of the peer in the session in the bearer update result.
- SIP 200 OK (SDP-S)
- the handover control logic entity responds to the bearer update result. (SIP: ACK)
- the Sl-106 the handover control logic entity initiates bearer update to the handover destination side access network by using the bearer information fed back by the peer end in the session.
- the handover control logic entity updates the bearer information of the handover destination side access network according to the bearer information sent by the peer end in the session; (BEARER UPD REQUEST (SDP-S))
- the Sl-107, the switching destination side access network receives the mobile terminal handover complete message, and notifies the handover control logic entity. ( HANDOFF COMPLETE )
- the handover control logic entity initiates the clearing of the primary channel to the primary access network in the session; (CLEAR COMMAND)
- Example 2 Inter-office switching in non-query mode.
- the inter-office handover is that the original side access network and the handover destination side access network in the session are respectively within the coverage of different handover control logic entities.
- the primary side access network initiates a handover request to the original side handover control logical entity, and does not carry the bearer information of the peer end in the session.
- HANDOFF REQUIRED The Sl-202, the handover control logic entity initiates a handover request to the handover destination side access network.
- Sl-203 The switching destination side access network establishes an air interface channel, and feeds back to the handover control logic entity. - after the destination side access network establishes the air interface channel, the handover control logic entity feeds back the handover request confirmation to the destination side; and carries the bearer information of the handover destination side in the feedback message; (HANDOFF REQUEST ACK)
- the destination side handover control logic entity informs the original side handover control logical entity that the channel has been established through the SIP signaling, and carries the bearer information of the handover destination side.
- SIP 183 ( SDP-T ) HANDOFF REQUEST ACK
- the handover control logic entity informs the original side access network switching destination side channel that the session has been established, and starts the handover.
- the primary side handover control logic entity initiates a handover command to the primary side access network in the session
- the original side access network in the session informs the original side that the handover control logic entity has been switched; (HANDOFF COMMANCE)
- the handover control logic entity initiates bearer update to the peer end in the session by switching the destination side bearer information.
- the primary side handover control logic entity packs the bearer information of the handover destination side into the SIP signaling, and initiates a bearer update to the peer end in the session through the session layer (P-CSCF call session control function proxy entity); (SIP: reINVITE (SDP) -T ) )
- the peer end carries the update result by SIP signaling feedback through the session layer; and carries the current bearer information of the peer in the session in the bearer update result; (SIP: 200 OK (SDP-S))
- the primary side handover control logic entity responds to the bearer update result by SIP signaling; (SIP: ACK) Sl-206, and the handover control logic entity forwards the bearer information fed back by the peer end in the session to the handover destination
- SIP SIP signaling
- the original side handover control entity transmits a bearer update request to the destination side handover control logic entity through SIP signaling, and carries the current bearer information of the peer end in the session in the request message; (SIPrPRACK (SDP-S))
- the destination side handover control logic entity forwards the control logic entity feedback to the primary side through SIP signaling; (SIP: 200 OK)
- the handover control logic entity After switching the destination side access network to perform bearer update on the current bearer information in the session, the handover control logic entity feeds back the bearer update result to the destination side. ( BEARER UPD RESPONSE )
- the Sl-207, the switching destination side access network receives the mobile terminal handover complete message, and notifies the handover control logic entity.
- the destination side handover control logic entity notifies the original side handover control entity through SIP signaling, and the user has completed the handover; (SIP: 200 OK)
- the primary side handover control logic entity switches control logic entity feedback to the destination side through SIP signaling. (SIP: 200 OKACK)
- the original side handover control logic entity initiates the clearing of the original side channel; (CLEAR COMMAND)
- the primary side handover control logic entity informs the destination side handover control logic entity through SIP signaling that the original side channel has been cleared.
- Example 3 Inter-office switching in query mode.
- S1-301 The primary side access network in the session initiates a handover request to the original side handover control logic entity. ( HANDOFF REQUIRED )
- the handover control logic entity initiates a handover request to the handover destination side access network.
- the primary side handover control logic entity queries the destination side handover control logic entity through SIP signaling to switch the handover destination side access network address; (SIP: MESSAGE (CI LIST))
- the destination side handover control logic entity feeds back to the original side handover control logic entity through the SIP signaling to switch the destination side access network address; (SIP: 200 OK (BSC-CI LIST))
- the primary side handover control logic entity initiates a handover request to the handover destination side access network, and does not carry the bearer information of the peer end in the session. ( HANDOFF REQUEST )
- the S-switching control logic entity feeds back the handover request confirmation, and carries the bearer information of the handover destination side in the feedback message.
- the handover control logic entity informs the original side access network switching destination side channel that the session has been established, and starts switching.
- the primary side handover control logic entity initiates a handover command to the primary side access network in the session; (HANDOFF COMMAND)
- the primary side access network in the session informs the primary side handover control logical entity that the handover has begun.
- S1-305 is the same as S1-205 described above.
- SIP:reINVITE SDP-T
- SIP:200 OK SDP-S
- SIP:ACK SIP:ACK
- the Sl-306, the handover control logic entity initiates bearer update to the handover destination side access network by using the bearer information fed back by the peer end in the session.
- the primary side handover control logic entity initiates a bearer update directly to the handover destination side access network by using the bearer information fed back by the peer end in the session according to the handover destination side access network address; (BEARER UPD REQUEST(SDP-S) )
- the Sl-307 the switching destination side access network receives the mobile terminal handover complete message, and notifies the handover control logic entity.
- the destination side handover control logic entity interacts with the primary side handover control logic entity through SIP signaling.
- the method for carrying the bearer information of the peer end in the session when the original side initiates the handover includes the following steps:
- the original access network in the session initiates a handover to the handover control logical entity, and carries the bearer information of the peer in the session;
- the handover control logic entity initiates a handover request to the handover destination side access network.
- the switching destination side access network establishes an air interface channel, and feeds back to the handover control logic entity; S2-4.
- the handover control logic entity informs the session that the original side access network handover destination side channel has been established, and starts to switch;
- the handover control logic entity initiates a bearer update to the peer end in the session by switching the destination side bearer information.
- the switching control logic entity compares whether the bearer information of the peer end in the original stored session is the same as the bearer information fed back by the peer end in the session. If they are the same, the process proceeds to S2-8. If not, the process proceeds to S2-7.
- the handover control logic entity initiates a bearer update to the handover destination side access network by using the bearer information fed back by the peer end in the session;
- the switching destination side access network receives the mobile terminal handover complete message, and notifies the handover control logic entity; S2-9, clear the original channel.
- Example 4 Intra-office switching.
- the original access network of the S2-40 initiates a handover request to the handover control logic entity, and carries the bearer information of the peer in the session saved by the primary side access network in the session.
- the handover control logic entity initiates a handover request to the handover destination side access network.
- the switching control logic entity feeds back the handover request confirmation; and the feedback message carries the bearer information of the handover destination side.
- the handover control logic entity informs the session that the original side access network switching destination side channel has been established in the session, and starts to switch.
- the handover control logic entity initiates a handover command to the primary side access network
- the primary side access network informs the handover control logical entity that the handover has begun.
- the handover control logic entity initiates a bearer update to the peer end in the session by switching the destination side bearer information.
- the handover control logic entity packs the bearer information of the handover destination side into the SIP signaling, and initiates a bearer update to the peer end in the session through the session layer (P-CSCF call session control function proxy entity);
- the peer end carries the update result by the SIP signaling feedback through the session layer; and carries the current bearer information of the peer in the session in the bearer update result;
- the handover control logic entity responds to the bearer update result.
- the handover control logic entity compares whether the bearer information of the peer end in the session saved by the original side access network in the session is the same as the current bearer information fed back by the peer end in the session, and if yes, the process proceeds to S2-408; If it is different, go to S2-407.
- the handover control reverse entity performs the bearer update to the handover destination access network by using the bearer information fed back by the peer in the session;
- the handover destination side access network receives the mobile terminal handover complete message, and notifies the handover control logic entity.
- the handover control logic entity initiates the clearing of the original side channel to the primary side access network in the session; - the original side access network in the session feeds back the clearing completion message to the handover control logic entity after the original side channel clearing is completed.
- Example 5 Inter-office switching in non-query mode.
- the primary side access network initiates a handover request to the primary side handover control logical entity, and carries the bearer information of the peer end in the session saved by the primary side access network in the session. ( HANDOFF REQUIRED )
- the handover control logic entity initiates a handover request to the handover destination side access network.
- the primary side handover control logic entity forwards the initiated handover request to the destination side handover control logic entity through SIP signaling; (SIP: ITE (SDP-S) (HANDOFF REQUIRED))
- the destination side handover control logic entity forwards the originating handover request to the handover destination side access network. (HANDOFF REQUEST )
- the switching destination side access network establishes an air interface channel, and feeds back to the handover control logic entity.
- the handover control logic entity feeds back the handover request confirmation to the destination side; and carries the bearer information of the handover destination side in the feedback message; (HANDOFF REQUEST ACK)
- the destination side handover control logic entity notifies the original side handover control logical entity channel that the channel has been established through the SIP signaling; and carries the bearer information of the handover destination side.
- SIP 180 ( SDP-T ) HANDOFF REQUEST ACK )
- S2-504 The handover control logic entity notifies that the original side access network switching destination side channel has been established in the session, and starts to switch.
- the primary side handover control logic entity initiates a handover command to the primary side access network in the session; (HANDOFF COMMAND)
- the primary side access network in the session informs the primary side handover control logical entity that the handover has begun. ( HANDOFF COMMANCE )
- the primary side handover control logic entity switches control logic entity feedback to the destination side through SIP signaling.
- PRACK this step is the step specified by the SIP protocol); (SIPiPRACK)
- the destination side handover control logic entity responds with 200 OK via SIP signaling (this step is the procedure specified by the SIP protocol). (SIP-.200 OK)
- the handover control logic entity initiates a bearer update to the peer end in the session by switching the destination side bearer information.
- the primary side handover control logic entity packs the bearer information of the handover destination side into the SIP signaling, and initiates a bearer update to the peer end in the session through the session layer (P-CSCF call session control function proxy entity); (SIP: reINVITE (SDP) -T ) )
- the peer end carries the update result by the SIP signaling feedback through the session layer; and carries the current bearer information of the peer in the session in the bearer update result.
- SIP 200 OK ( SDP-S' )
- S2-506 The original side handover control logic entity compares whether the bearer information of the peer end in the session saved by the original side access network in the session is the same as the current bearer information fed back by the peer end in the session. 508; If it is different, go to S2-507.
- the handover control logic entity initiates a bearer update to the handover destination side access network by using the bearer information fed back by the peer end in the session.
- the primary side handover control logic entity initiates bearer update to the destination side handover control logic entity through SIP signaling by using the current bearer information fed back by the peer in the session; (13SIP: UPDATE(SDP-S')
- the destination side handover control logic entity forwards the bearer update request to the handover destination side access network;
- the handover control logic entity After switching the destination side access network to perform bearer update, the handover control logic entity feeds back the bearer update result to the destination side; ( 15.BEARER UPD RESPONSE )
- the destination side handover control logic entity feeds back the update result to the primary side handover control logic entity through SIP signaling.
- the handover destination side access network receives the mobile terminal handover complete message, and notifies the handover control logic entity.
- the primary side handover control logic entity switches control logic entity feedback to the destination side through SIP signaling. (21.SIP: 200 OKACK)
- the primary side handover control logic entity initiates the clearing of the original side channel; (19CLEAR COMMAND) - After the original side channel clearing is completed in the session, the original side switching control logic entity feeds back the clear completion message to the original side; (20.CLEAR COMPLETE)
- the destination side handover control logic entity interacts with the primary side handover control logic entity through SIP signaling.
- Example 6 Inter-office switching in query mode.
- S2-601 The primary side access network in the session initiates a handover request to the original side handover control logic entity.
- S2-602. The handover control logic entity initiates a handover request to the handover destination side access network.
- the primary side handover control logic entity queries the destination side handover control logic entity through the SIP signaling to query the handover destination side access network address;
- the destination side handover control logic entity feeds back to the original side handover control logic entity through the SIP signaling to switch the destination side access network address;
- the primary side handover control logic entity initiates a handover request to the handover destination side access network according to the handover destination side access network address, and carries the information of the peer end in the session saved by the primary side access network in the session.
- the switching destination control network After the establishment of the air interface channel, the switching destination control network forwards the handover request to the original side, and carries the bearer information of the handover destination side in the feedback message.
- the handover control logic entity informs the original side access network switching destination side channel that the session has been established, and starts the handover.
- the primary side handover control logic entity initiates a handover command to the primary side access network in the session
- the primary side access network in the session informs the primary side handover control logical entity that the handover has begun.
- the handover control logic entity initiates a bearer to the peer end in the session by switching the bearer information of the destination side Update.
- the primary side handover control logic entity packs the bearer information of the handover destination side into the SIP signaling, and initiates a bearer update to the peer end in the session through the session layer (the P-CSCF call session control function proxy entity);
- the peer end carries the update result by the SIP signaling feedback through the session layer; and carries the current bearer information of the peer in the session in the bearer update result.
- the handover control logic entity initiates bearer update to the handover destination side access network by using bearer information fed back by the peer end in the session.
- the primary side handover control logic entity initiates bearer update directly to the handover destination side access network by using the bearer information of the peer end feedback in the session according to the handover destination side access network address;
- the original side handover control logic entity feeds back the bearer update result.
- the handover destination side access network receives the mobile terminal handover complete message, and notifies the handover control logic entity.
- the user equipment feeds back the handover completion message to the original side handover control logic entity at the handover destination side access network.
- the original side access network in the session switches to the original side switching control logic entity to feed back the clear completion message;
- the primary side handover control logic entity switches the control logic entity to the notification destination side through SIP signaling, and the primary side channel is cleared.
- the destination side handover control logic entity interacts with the primary side handover control logic entity through SIP signaling.
- the present invention provides another method.
- the interaction between the original side and the side of the UI is completed by SIP signaling.
- the primary side handover control logic entity and the destination side handover control logic entity respectively add endpoints on their corresponding MGWs, and change the endpoints during handover to implement handover of the mobile terminal.
- the primary side access network initiates handover by using a handover control logic entity by using SIP signaling, and the primary side handover control logic entity and the destination side handover control logic entity respectively add endpoints on their corresponding MGWs.
- the primary side handover control logic entity adds an endpoint on the primary side MGW; ( ADD($4) )
- the PCI entity forwards the originating handover request to the destination side handover control logic entity through SIP signaling; (SIP: INVITE (SDP-4) HANDOFF REQUIRED)
- the destination side MGW feeds back the bearer information of the endpoint; ( REPLY ( SDP-5 ) )
- the handover control logic entity After switching the destination side access network to establish an air interface channel, the handover control logic entity feeds back the handover request confirmation to the destination side; (HANDOFF REQUEST ACK)
- the destination side handover control logic entity informs the original side handover control logical entity that the channel has been established through the SIP signaling, and carries the bearer information of the endpoint added by the destination side in the notification message.
- SIP 183 ( SDP-5 ) HANDOFF REQUEST ACK
- the handover control logic entity informs the session that the original side access network switching destination side channel has been established in the session, and starts to switch.
- the primary side handover control logic entity initiates a handover command to the primary side access network in the session; (HANDOFF COMMAND)
- the primary side access network in the session informs the primary side handover control logical entity that the handover has begun. ( HANDOFF COMMANCE )
- the primary side handover control logic entity modifies its added endpoint to the endpoint of the destination side handover control logic entity.
- the destination side handover control logic entity informs the original side handover control logic entity through SIP signaling that the original side handover control logic entity responds by using SIP signaling.
- the destination side handover control logic entity notifies the original side handover control logic entity through SIP signaling, and the user has completed the handover; (SIP: 200 OK)
- the primary side handover control logic entity sends a known handover complete message to the destination side handover control logic entity via SIP signaling.
- SIP SIP: ACK
- the original side switching control logic entity deletes the switching original side end point in the original MGW; ( SUBSTRACT )
- the original MGW feeds back the deletion result to the original side handover control logic entity.
- the destination side handover control logic entity interacts with the primary side handover control logic entity through SIP signaling.
- the present invention provides a handover control logic entity, as shown in FIG. 10, which includes: a circuit domain handover signaling processing module, a bearer update module, and an interoffice handover signal respectively connected to the handover control logic module. Let the processing module and media gateway control module.
- the circuit domain switching signaling processing module is configured to process handover signaling of a circuit domain access network.
- the bearer update module is configured to initiate a bearer update to the session peer.
- the inter-office handover signaling processing module may negotiate switching information with the handover destination side device through SIP signaling.
- the switching information may be carried by the new SIP signaling, or the switching information may be carried by extending the field in the SIP signaling, or the original SIP signaling bearer switching information may be directly used to query the destination side device for the destination side radio access network. Entity ID.
- the media gateway control module is configured to control the media gateway, so that the media gateway can complete the bearer exchange between the primary side access network and the switching destination side access network and the core network according to the instruction of the module.
- the switching control logic module is configured to control a circuit domain handover signaling processing module, a bearer update module, an interoffice handover signaling processing module, and a media gateway control module to complete the handover.
- the present invention provides a switching system, as shown in Figure 11, which includes:
- the IMS network the circuit domain access network, and the media gateway, and the handover control logic entities respectively connected to them.
- a circuit domain switching signaling processing module in the handover control logic entity is connected to the circuit domain access network; a bearer update module in the handover control logic entity is connected to the IMS network; and the handover control logic entity is The media gateway control module is connected to the media gateway.
- the system includes at least one handover control logic entity, and performs bearer information interaction between the handover control logic entity and the IMS network through a SIP protocol.
- the primary side and the handover destination side respectively correspond to one handover control logic entity, and the handover control logic entity corresponding to the original side and the handover destination side respectively passes
- the inter-office handover signaling processing module inside the handover control logic entity is connected.
- the switching control logic entity corresponding to the original side and the switching destination side can exchange information through SIP signaling.
- the media gateway is configured to receive a control command sent by the media gateway control module in the handover control logic entity to complete bearer exchange between the original side, the switching destination side, and the core network.
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Description
无线切换方法及系统 技术领域
本发明涉及无线网络领域, 特别是涉及无线切换方法、 无线切换控制逻 辑实体和无线切换系统。
背景技术
现有的局内切换方法, 参见图 1所示, 包括下列步骤:
-原侧接入网络发起切换申请;
-移动业务交换中心 (MSC ) 向目的侧接入网络发起切换请求;
-目的侧接入网络建立空中信道后向 MSC反馈切换证实;
-MSC向原侧接入网络发起切换命令;
-原侧接入网络反馈切换开始;
-当无线切换到目标信道后, 目的侧接入网络向 MSC发起切换完成指示; -MSC拆除原侧接入网络的信道。
现有的局间切换方法, 参见图 2所示, 包括下列步骤:
-局间切换在 MSC与接入网络间接口上的流程与局内切换相同;
-局间通过 MAP信令交换切换相关信息;
-原侧 MSC收到切换申请后, 向目的侧 MSC发起切换请求;
-目的侧 MSC在收到目的侧接入网络的切换证实后, 向原侧 MSC返回切 换请求响应;
-当目的侧 MSC收到切换完成后, 通过 MSONCH消息通知 ^侧 MSC切 换完成。
但目前还没有通过更新会话中对端的承载信息来实现切换的方法。
目前也没有通过 SIP信令完成会话中原侧接入网络与切换目的侧接入网 络之间的交互, 来实现切换的方法。
发明内容
本发明提供无线切换方法, 用于解决目前没有通过更新会话中对端的承 载信息来实现切换的问题。 进一步通过 SIP信令完成会话中原侧接入网络与 切换目的侧接入网络之间的交互。
本发明又提供一种无线切换方法, 用于解决目前没有通过 SIP信令完成 会话中原侧接入网络与切换目的侧接入网络之间的交互来实现切换的问题。
本发明还提供了一种切换控制逻辑实体, 用于支撑本发明方法。
本发明又提供了一种切换系统, 用于支撑本发明方法。
本发明方法包括下列步骤:
A、会话中原侧接入网络通过切换控制逻辑实体向切换目的侧接入网络发 起切换, 并且不携带会话中对端的承载信息;
B、切换控制逻辑实体以切换目的侧承载信息向所述会话中对端发起承载 更新;
C、切换控制逻辑实体以会话中对端反馈的承载信息向切换目的侧接入网 络发起承载更新, 完成切换。
步骤 B中所述切换目的侧承载信息是在发起切换后 , 由切换目的侧接入 网络反馈给所述切换控制逻辑实体。
步骤 B中所述切换控制逻辑实体通过会话层以 SIP信令向会话中对端发 起承载更新。
步骤 B中所述会话中对端通过会话层以 SIP信令向切换控制逻辑实体反 馈该会话中对端当前的承载信息。
所述会话中原侧接入网絡和切换目的侧接入网在同一切换控制逻辑实体 覆盖范围内。
所述步骤 A包括下列步骤:
-原侧接入网络向切换控制逻辑实体发起切换请求;
-切换控制逻辑实体向目的侧接入网络转发该切换请求;
-目的侧接入网络建立空口信道后, 向切换控制逻辑实体反馈切换请求证 实;
-切换控制逻辑实体向原侧接入网络发起切换命令;
-原侧接入网络告知切换控制逻辑实体切换已经开始。
所述步骤 B包括下列步骤:
-切换控制逻辑实体向会话中对端发起承载更新;
-会话中对端反馈承载更新结果;
-切换控制逻辑实体响应所述承载更新结果。
所述步骤 C包括下列步骤:
-切换控制逻辑实体以会话中对端反馈的承载信息向切换目的侧接入网络 发起承载更新;
-切换目的侧接入网络反馈更新结果;
-用户设备完成空口切换, 并在切换目的侧接入网络反馈切换完成。
所述步骤 C之后还包括步骤: D、 切换控制逻辑实体在切换工作完成后, 清除原侧信道。
所述步骤 D包括下列步骤:
-完成切换工作后, 切换控制逻辑实体发起清除原侧信道;
-会话中原侧接入网络在原侧信道清除完成后, 向切换控制逻辑实体反馈 清除完成消息。
所述会话中原侧接入网络和切换目的侧接入网分别在不同的切换控制逻 辑实体覆盖范围内。
原侧切换控制逻辑实体与目的侧切换控制逻辑实体之间通过 SIP信令传 输切换信息。
所述步骤 B包括下列步驟:
-原侧切换控制逻辑实体向会话中对端发起承载更新;
-会话中对端反馈承载更新结果;
-原侧切换控制逻辑实体响应所述承载更新结果。
所述步骤 A包括下列步骤:
-会话中原侧接入网络向原侧切换控制逻辑实体发起切换请求;
-原侧切换控制逻辑实体向目的侧切换控制逻辑实体转发所述发起切换请 求;
-目的侧切换控制逻辑实体向切换目的侧接入网络转发所述发起切换请 求;
-切换目的侧接入网络建立空口信道后, 向目的侧切换控制逻辑实体反馈 切换请求证实;
-目的侧切换控制逻辑实体告知原侧切换控制逻辑实体信道巳经建立; -原侧切换控制逻辑实体向会话中原侧接入网络发起切换命令;
-会话中原侧接入网络告知原侧切换控制逻辑实体切换已经开始。
所述步骤 C包括下列步骤:
-原侧切换控制逻辑实体以会话中对端反馈的承载信息向目的侧切换控 制逻辑实体发起承载更新;
-目的侧切换控制逻辑实体回应所述承载更新请求;
-目的侧切换控制逻辑实体向切换目的侧接入网络转发所述承载更新请 求;
-切换目的侧接入网络进行承载更新后, 向目的侧切换控制逻辑实体反馈 承载更新结果;
-用户设备在切换目的侧接入网络向目的侧切换控制逻辑实体反馈切换完 成消息;
-目的侧切换控制逻辑实体告知原侧切换控制逻辑实体,用户已完成切换; -原侧切换控制逻辑实体向目的侧切换控制逻辑实体回应已获知切换完 成。
所述步驟 A包括下列步骤:
-会话中原侧接入网络向原侧切换控制逻辑实体发起切换请求;
-原侧切换控制逻辑实体向目的侧切换控制逻辑实体查询切换目的侧接入
网絡地址;
-目的侧切换控制逻辑实体向原侧切换控制逻辑实体反馈切换目的侧接入 网络地址;
-原侧切换控制逻辑实体向切换目的侧接入网络发起切换请求;
-切换目的侧接入网络建立空口信道后, 向原侧切换控制逻辑实体反馈切 换请求证实;
-原侧切换控制逻辑实体向会话中原侧接入网络发起切换命令;
-会话中原侧接入网络告知原侧切换控制逻辑实体切换已经开始。
所述步骤 C包括下列步骤:
-原侧切换控制逻辑实体以会话中对端反馈的承载信息向切换目的侧接入 网络发起承载更新;
-切换目的侧接入网络进行承载更新后, 向原侧切换控制逻辑实体反馈承 载更新结果;
-用户设备在切换目的侧接入网絡向原侧切换控制逻辑实体反馈切换完成 消息。
所述步骤 C之后还包括步骤: D、 切换控制逻辑实体在切换工作完成后, 清除原侧信道。
所述步骤 D包括下列步骤:
-完成切换工作后, 原侧切换控制逻辑实体发起清除原侧信道;
-会话中原侧接入网络在原侧信道清除完成后, 向原侧切换控制逻辑实体 反馈清除完成消息。
所述步骤 D之后, 用户在切换目的侧接入网络进行操作时, 目的侧切换 控制逻辑实体通过 SIP信令与原侧切换控制逻辑实体交互。
本发明另一种无线切换方法, 包括下列步驟:
A、在会话中原侧接入网络通过切换控制逻辑实体向切换目的侧接入网络 发起切换, 并且携带所述会话中原侧接入网络保存的会话中对端的承载信息;
B、切换控制逻辑实体以切换目的侧承载信息向所述会话中对端发起承载
更新, 完成切换。
所述步骤 B中, 在向会话中对端发起承载更新后, 判断会话中对端反馈 的当前承载信息是否与所述会话中原侧接入网絡保存的会话中对端的承载信 息相同, 若相同, 则完成切换; 否则, 切换控制逻辑实体以会话中对端反馈 的当前承载信息向切换目的侧接入网络发起承载更新, 完成切换。
步骤 B中所述切换目的侧承载信息是在发起切换后, 由切换目的侧接入 网络反馈给所述切换控制逻辑实体。
步骤 B中所述切换控制逻辑实体通过会话层以 SIP信令向会话中对端发 起承载更新。
步骤 B中所述会话中对端通过会话层以 SIP信令向切换控制逻辑实体反 馈该会话中对端当前的承载信息。
所述会话中原侧接入网络和切换目的侧接入网在同一切换控制逻辑实体 覆盖范围内。
所述步骤 A包括下列步骤:
-原侧接入网络向切换控制逻辑实体发起切换请求, 并在该请求中携带所 述会话中原侧接入网络保存的会话中对端的承载信息;
-切换控制逻辑实体向目的侧接入网络转发该切换请求;
-切换目的侧接入网络建立空口信道后, 向切换控制逻辑实体反馈切换请 求证实;
-切换控制逻辑实体向原侧接入网络发起切换命令;
-原侧接入网络告知切换控制逻辑实体切换已经开始。
所述步骤 B包括下列步骤:
-切换控制逻辑实体向会话中对端发起承载更新;
-会话中对端反馈承载更新结果, 并携带该会话中对端当前的承载信息; -切换控制逻辑实体响应所述承载更新结果;
-判断所述会话中对端反馈的当前承载信息是否与所述会话中原侧接入网 络保存的会话中对端的承载信息相同, 若相同, 则完成切换;
否则, 切换控制逻辑实体以所述会话中对端反馈的当前承载信息向切换 目的侧接入网络发起承载更新;
-切换目的侧接入网络反馈更新结果;
-用户设备完成空口切换, 并在切换目的侧接入网络反馈切换完成。 所述步骤 B之后还包括步骤:
C、 切换控制逻辑实体在切换工作完成后, 清除原侧信道。
所述步骤 C包括下列步骤:
-完成切换工作后, 切换控制逻辑实体发起清除原侧信道;
-会话中原侧接入网络在原侧信道清除完成后, 向切换控制逻辑实体反馈 清除完成消息。
-所述会话中原侧接入网络和切换目的侧接入网络分别在不同的切换控制 逻辑实体覆盖范围内。
-原侧切换控制逻辑实体与目的侧切换控制逻辑实体之间通过 SIP信令传 输切换信息。
所述步骤 A包括下列步骤:
-会话中原侧接入网络向原侧切换控制逻辑实体发起切换请求, 并在该请 求中携带所述会话中原侧接入网络保存的会话中对端的承载信息;
-原侧切换控制逻辑实体向目的侧切换控制逻辑实体转发所述发起切换请 求;
-目的侧切换控制逻辑实体向切换目的侧接入网络转发所述发起切换请 求;
-切换目的侧接入网络建立空口信道后, 向目的侧切换控制逻辑实体反馈 切换请求证实;
-目的侧切换控制逻辑实体告知原侧切换控制逻辑实体信道已经建立; -原侧切换控制逻辑实体向会话中原侧接入网絡发起切换命令;
-会话中原侧接入网络告知原侧切换控制逻辑实体切换已经开始。
所述步驟 B包括下列步骤:
-原侧切换控制逻辑实体向会话中对端发起承载更新;
-会话中对端反馈承载更新结果, 并携带该会话中对端当前的承载信息; -原侧切换控制逻辑实体响应所述承载更新结果;
-判断所述会话中对端反馈的当前承载信息是否与所述会话中原侧接入网 络保存的会话中对端的承载信息相同, 若相同, 则完成切换;
否则, 原侧切换控制逻辑实体以所述会话中对端反馈的当前承载信息向 目的侧切换控制逻辑实体发起承载更新;
-目的侧切换控制逻辑实体向切换目的侧接入网絡转发所述承载更新请 求;
-切换目的侧接入网絡进行承载更新后, 向目的侧切换控制逻辑实体反馈 承载更新结果;
-目的侧切换控制逻辑实体向原侧切换控制逻辑实体反馈更新结果; -用户设备在切换目的侧接入网络向目的侧切换控制逻辑实体反馈切换完 成消息;
-目的侧切换控制逻辑实体告知原侧切换控制逻辑实体,用户已完成切换。 所述步骤 A包括下列步骤:
-会话中原侧接入网络向原侧切换控制逻辑实体发起切换请求;
-原侧切换控制逻辑实体向目的侧切换控制逻辑实体查询切换目的侧接入 网络地址;
-目的侧切换控制逻辑实体向原侧切换控制逻辑实体反馈切换目的侧接入 网络地址;
-原侧切换控制逻辑实体向切换目的侧接入网络发起切换请求, 并在该请 求中携带所述会话中原侧接入网络保存的会话中对端的承载信息;
-切换目的侧接入网絡建立空口信道后, 向原侧切换控制逻辑实体反馈切 换请求证实;
-原侧切换控制逻辑实体向会话中原侧接入网络发起切换命令;
-会话中原侧接入网络告知原侧切换控制逻辑实体切换已经开始。
所述步骤 B包括下列步骤:
-原侧切换控制逻辑实体向会话中对端发起承载更新;
-会话中对端反馈承载更新结果, 并携带该会话中对端当前的承载信息;
-原侧切换控制逻辑实体响应所述承载更新结果;
-判断所述会话中对端反馈的当前承载信息是否与所述会话中原侧接入网 络保存的会话中对端的承载信息相同, 若相同, 则完成切换;
否则, 原侧切换控制逻辑实体以所述会话中对端反馈的当前承载信息向 切换目的侧接入网络发起承载更新请求;
-切换目的侧接入网络向原侧切换控制逻辑实体反馈更新结果;
-用户设备在切换目的侧接入网络向原侧切换控制逻辑实体反馈切换完成 消息。
所述步骤 B之后还包括步骤: C、 切换控制逻辑实体在切换工作完成后, 清除原侧信道。
所述步骤 C包括下列步骤:
-完成切换工作后, 原侧切换控制逻辑实体发起清除原侧信道;
-会话中原侧接入网络在原侧信道清除完成后, 向原侧切换控制逻辑实体 反馈清除完成消息;
-原侧切换控制逻辑实体告知目的侧切换控制逻辑实体,原侧信道已清除。 所述步骤 C之后, 用户在切换目的侧接入网络进行操作时, 目的侧切换 控制逻辑实体通过 SIP信令与原侧切换控制逻辑实体交互。
本发明又一种无线切换方法, 包括下列步骤:
A、会话中原侧接入网络通过切换控制逻辑实体以 SIP信令发起切换, 以 及原侧切换控制逻辑实体和目的侧切换控制逻辑实体分别在其对应的媒体网 关 MGW上增加端点;
B、原侧切换控制逻辑实体将其增加的端点修改为目的侧切换控制逻辑实 体增加的端点, 完成切换;
(:、 目的侧切换控制逻辑实体通过 SIP信令告知原侧切换控制逻辑实体切
换完成后, 原侧切换控制逻辑实体通过 SIP信令响应。
所述步骤 A包括下列步骤:
-会话中原侧接入网络向原侧切换控制逻辑实体发起切换请求;
-原侧切换控制逻辑实体在原侧 MGW上增加端点;
-原侧 MGW反馈该端点的承载信息;
-原侧切换控制逻辑实体通过 SIP信令向目的侧切换控制逻辑实体转发所 述发起切换请求;
-目的侧切换控制逻辑实体向切换目的侧接入网络转发所述发起切换请 求;
-目的侧切换控制逻辑实体在目的侧 MGW上增加端点;
-目的侧 MGW反馈该端点的承载信息;
-切换目的侧接入网络建立空口信道后, 向目的侧切换控制逻辑实体反馈 切换请求证实;
-目的侧切换控制逻辑实体通过 SIP信令告知原侧切换控制逻辑实体信道 已经建立, 并在所述告知消息中携带目的侧增加的端点的承载信息;
-原侧切换控制逻辑实体向会话中原侧接入网络发起切换命令;
-会话中原侧接入网络告知原侧切换控制逻辑实体切换已经开始。
所述步骤 B包括下列步骤:
-原侧切换控制逻辑实体根据目的侧增加的端点的承载信息, 将原侧增加 的端点修改为目的侧端点;
-原侧 MGW向原侧切换控制逻辑实体反馈修改结果。
所述步骤 C包括下列步骤:
-用户设备在切换目的侧接入网络向目的侧切换控制逻辑实体反馈切换完 成消息;
-目的侧切换控制逻辑实体通过 SIP信令告知原侧切换控制逻辑实体, 用 户已完成切换;
-原侧切换控制逻辑实体通过 SIP信令向目的侧切换控制逻辑实体发送已
获知切换完成消息。
所述步驟 C之后还包括步驟: D、 切换控制逻辑实体在切换工作完成后, 清除原侧信道。
所述步骤 D包括下列步骤:
-原侧切换控制逻辑实体发起清除原侧信道;
-会话中原侧接入网络在原侧信道清除完成后 , 向原侧切换控制逻辑实体 反馈清除完成消息;
-原侧切换控制逻辑实体删除原侧 MGW中的会话中原侧端点;
-原侧 MGW向原侧切换控制逻辑实体反馈删除结果。
所述步骤 D之后, 用户在切换目的侧接入网络进行操作时, 目的侧切换 控制逻辑实体通过 SIP信令与原侧切换控制逻辑实体交互。
本发明提供一种无线切换控制逻辑实体, 包括:
电路域切换信令处理模块, 用于处理电路域接入网絡的切换信令; 承载更新模块, 用于向会话对端发起承载更新;
局间切换信令处理模块, 可通过 SIP信令与切换 PI的侧装置协商切换信 切换控制逻辑模块, 用于控制电路域切换信令处理模块、 承载更新模块 和局间切换信令处理模块, 来完成切换。
所述局间切换信令处理模块还可通过 SIP信令向所述目的侧装置查询目 的侧无线接入网实体标识。
所述通过 SIP信令与目的侧装置协商切换信息是通过新增的 SIP信令承载 切换信息, 或者通过扩展 SIP信令中的字段来承载切换信息, 或者直接使用 原有 SIP信令承载切换信息。
所述实体还包括:
媒体网关控制模块, 其与所述切换控制逻辑模块相连, 用于控制媒体网 关, 使媒体网关可根据该模块的指令完成原侧接入网络、 切换目的侧接入网 络和核心网络之间的承载交换。
本发明提供一种无线切换系统, 包括: IMS网络和电路域接入网络; 至少一个切换控制逻辑实体, 分别连接于所述 IMS网络和电路域接入网 络之间, 用于交互切换信息。
通过 SIP协议完成所述切换控制逻辑实体与 IMS网絡之间的切换信息交 互。
若原侧与切换目的侧不在同一切换控制逻辑实体覆盖范围内, 则所述原 侧与切换目的侧分别对应的切换控制逻辑实体之间相连。
所述原侧与切换 的侧分别对应的切换控制逻辑实体通过所述切换控制 逻辑实体内部的局间切换信令处理模块相连。
所述原侧与切换目的侧分别对应的切换控制逻辑实体通过 SIP信令交互 信息。
所述系统还包括: 媒体网关, 其与所述切换控制逻辑实体相连, 用于接 收所述切换控制逻辑实体内媒体网关控制模块发来的控制命令, 以完成原侧、 切换目的侧和核心网络之间的承载交换。
本发明有益效果如下:
本发明方法通过 SIP信令完成会话中原侧接入网络与切换目的侧接入网 络之间的交互, 并通过会话层以 SIP信令向会话中对端发起承载更新, 来完 成切换。
本发明另一种方法通过 SIP信令完成会话中原侧接入网络与切换目的侧 接入网络之间的交互, 进而通过更改在媒体网关上增加的端点来完成切换。
本发明提供一种无线切换控制逻辑实体, 用于支撑本发明方法。 其包括: 电路域切换信令处理模块, 用于处理电路域接入网络的切换信令; 承载更新 模块, 用于向会话对端发起承载更新; 局间切换信令处理模块, 可通过 SIP 信令与切换目的侧装置协商切换信息; 切换控制逻辑模块, 用于控制电路域 切换信令处理模块、 承载更新模块和局间切换信令处理模块, 来完成切换。
本发明提供一种无线切换系统, 用于支撑本发明方法。 在本系统中添加 了至少一个上述切换控制逻辑实体, 其连接于所述 IMS 网络和电路域接入网
络之间, 用于交互切换信息。 本系统通过 SIP协议完成所述切换控制逻辑实 体与 IMS 网络之间的切换信息交互, 进而实现对会话中对端的承载更新。 并 在原侧与切换目的侧不在同一切换控制逻辑实体覆盖范围内时, 通过 SIP信 令完成原侧与切换目的侧分别对应的切换控制逻辑实体之间的信息交互。 附图说明
图 1为现有技术的局内切换信令流程图;
图 2为现有技术的局间切换信令流程图;
图 3为本发明发起更新时不携带承载信息方式的步骤流程图;
图 4为本发明发起更新时不携带承载信息方式的局内切换信令流程图; 图 5为本发明发起更新时不携带承载信息方式的局间切换信令流程图; 图 6 为本发明发起更新时不携带承载信息并以查询方式完成局间切换信 令流程图;
图 7为本发明发起更新时携带承载信息方式的步驟流程图;
图 8为本发明发起更新时携带承载信息方式的局间切换信令流程图; 图 9为本发明在媒体网关上增加端点的方法完成局间切换的信令流程图; 图 10为本发明逻辑实体示意图;
图 11为本发明系统示意图。 具体实施方式
为了通过更新会话中对端的承载信息来实现切换, 本发明提供两种无线 切换方法, 分别基于原侧在发起切换时不携带会话中对端的承载信息和携带 所述承载信息的方式。
以下对两种方法分别举三个实例。
基于原侧在发起切换时不携带会话中对端的承载信息的方法, 参见图 3 所示, 包括下列步骤:
Sl-1、会话中原侧接入网络向切换控制逻辑实体发起切换,不携带会话中
对端的承载信息;
Sl-2、 切换控制逻辑实体向切换目的侧接入网络发起切换请求;
Sl-3、 切换目的侧接入网络建立空口信道, 并向切换控制逻辑实体反馈; Sl-4、 切换控制逻辑实体告知会话中原侧接入网络切换目的侧信道已建 立, 并开始切换;
Sl-5、切换控制逻辑实体以切换目的侧承载信息向会话中对端发起承载更 新;
Sl-6、切换控制逻辑实体以会话中对端反馈的承载信息向切换目的侧接入 网络发起承载更新;
Sl-7、切换目的侧接入网络收到移动终端切换完成消息,通知切换控制逻 辑实体;
Sl-8、 清除原信道。
实例一: 局内切换。 即会话中原侧接入网络和切换目的侧接入网络在同 一切换控制逻辑实体覆盖范围内。
参见图 4所示, 包括下列具体信令。
S1-10K会话中原侧接入网络向切换控制逻辑实体发起切换,不携带会话 中对端的承载信息。 ( HANDOFF REQUIRED )
S1-102 切换控制逻辑实体向切换目的侧接入网络发起切换请求。 ( HANDOFF REQUEST )
Sl-103、切换目的侧接入网络建立空口信道,并向切换控制逻辑实体反馈; 以及在所述反馈消息中携带切换目的侧的承载信息。 (HANDOFF REQUEST ACK )
S 1 - 104、切换控制逻辑实体告知会话中原侧接入网络切换目的侧信道已建 立, 并开始切换。
-切换控制逻辑实体向会话中原侧接入网络发起切换命令; ( HANDOFF COMMAND )
-会话中原侧接入网络告知切换控制逻辑实体切换已经开始。
( HANDOFF COMMANCE )
Sl-105、切换控制逻辑实体以切换 g的侧承载信息向会话中对端发起承载 更新。
-切换控制還辑实体将切换目的侧的承载信息打包到 SIP信令中, 通过会 话层 (P-CSCF 呼叫会话控制功能代理实体) 向会话中对端发起承载更新; ( SIP:reINVITE ( SDP-T ) )
-会话中对端通过会话层以 SIP信令反馈承载更新结果; 以及在所述承载 更新结果中携带该会话中对端当前的承载信息。 (SIP: 200 OK ( SDP-S ) )
-切换控制逻辑实体响应所述承载更新结果。 ( SIP:ACK )
Sl-106、切换控制逻辑实体以会话中对端反馈的承载信息向切换目的侧接 入网络发起承载更新。
-切换控制逻辑实体根据会话中对端发来的承载信息更新切换目的侧接入 网络的承载信息; ( BEARER UPD REQUEST ( SDP-S ) )
-切换目的侧接入网絡的更新工作完成后, 向切换控制逻辑实体反馈更新 结果; ( BEARER UPD RESPONSE )
Sl-107、切换目的侧接入网络收到移动终端切换完成消息,通知切换控制 逻辑实体。 ( HANDOFF COMPLETE )
S1-108, 清除原信道。
- 切换控制逻辑实体向会话中原侧接入网络发起清除原侧信道; ( CLEAR COMMAND )
-会话中原侧接入网絡在原侧信道清除完成后, 向切换控制逻辑实体反馈 清除完成消息。 ( CLEAR COMPLETE )
实例二: 非查询方式的局间切换。 所述局间切换为会话中原侧接入网络 和切换目的侧接入网絡分别在不同的切换控制逻辑实体覆盖范围内。
参见图 5所示, 包括下列具体信令。
S1-20 会话中原侧接入网络向原侧切换控制逻辑实体发起切换请求,不 携带会话中对端的承载信息。 ( HANDOFF REQUIRED )
Sl-202、 切换控制逻辑实体向切换目的侧接入网络发起切换请求。
-原侧切换控制逻辑实体通过 SIP信令向目的侧切换控制逻辑实体转发所 述发起切换请求; (SIP: INVITE ( HANDOFF REQUIRED ) )
-目的侧切换控制逻辑实体向切换目的侧接入网絡转发所述切换请求; ( HANDOFF REQUEST )
Sl-203、切换目的侧接入网络建立空口信道,并向切换控制逻辑实体反馈。 -切换目的侧接入网络建立空口信道后, 向目的侧切换控制逻辑实体反馈 切换请求证实; 以及在所述反馈消息中携带切换目的侧的承载信息; ( HANDOFF REQUEST ACK )
-目的侧切换控制逻辑实体通过 SIP信令告知原侧切换控制逻辑实体信道 已经建立, 并携带切换目的侧的承载信息。 (SIP:183 ( SDP-T ) HANDOFF REQUEST ACK )
S 1 -204、切换控制逻辑实体告知会话中原侧接入网络切换目的侧信道已建 立, 并开始切换。
-原侧切换控制逻辑实体向会话中原侧接入网络发起切换命令;
( HANDOFF COMMAND )
-会话中原侧接入网絡告知原侧切换控制逻辑实体切换已经开始; ( HANDOFF COMMANCE )
SI -205,切换控制逻辑实体以切换目的侧承载信息向会话中对端发起承载 更新。
-原侧切换控制逻辑实体将切换目的侧的承载信息打包到 SIP信令中, 通 过会话层( P-CSCF呼叫会话控制功能代理实体)向会话中对端发起承载更新; ( SIP:reINVITE ( SDP-T ) )
-会话中对端通过会话层以 SIP信令反馈承载更新结果; 以及在所述承载 更新结果中携带该会话中对端当前的承载信息; (SIP:200 OK ( SDP-S ) )
-原侧切换控制逻辑实体通过 SIP信令响应所述承载更新结果;( SIP:ACK ) Sl-206、切换控制逻辑实体以会话中对端反馈的承载信息向切换目的侧接
入网络发起承载更新。
-原侧切换控制 £辑实体通过 SIP信令向目的侧切换控制逻辑实体发送承 载更新请求, 并在该请求消息中携带所述会话中对端当前的承载信息; ( SIPrPRACK ( SDP-S ) )
-目的侧切换控制逻辑实体通过 SIP信令向原侧切换控制逻辑实体反馈; ( SIP:200 OK )
-目的侧切换控制逻辑实体向切换目的侧接入网络转发所述承载更新请 求; ( BEARER UPD REQUEST )
-切换目的侧接入网络以会话中对端当前的承载信息进行承载更新后, 向 目的侧切换控制逻辑实体反馈承载更新结果。 ( BEARER UPD RESPONSE )
Sl-207、切换目的侧接入网络收到移动终端切换完成消息,通知切换控制 逻辑实体。
-用户设备在切换目的侧接入网络向目的侧切换控制逻辑实体反馈切换完 成消息; ( HA DOFF COMPLETE )
-目的侧切换控制逻辑实体通过 SIP信令告知原侧切换控制 辑实体, 用 户已完成切换; (SIP:200 OK )
-原侧切换控制逻辑实体通过 SIP信令向目的侧切换控制逻辑实体反馈。 ( SIP:200 OKACK )
Sl-208 清除原信道。
-完成切换工作后, 原侧切换控制逻辑实体发起清除原侧信道; (CLEAR COMMAND )
-会话中原侧接入网络在原侧信道清除完成后, 向原侧切换控制逻辑实体 反馈清除完成消息; (CLEAR COMPLETE )
-原侧切换控制逻辑实体通过 SIP信令告知目的侧切换控制逻辑实体, 原 侧信道已清除。
之后, 若用户在切换目的侧接入网络进行操作时, 目的侧切换控制逻辑 实体通过 SIP信令与原侧切换控制逻辑实体交互。
实例三: 查询方式的局间切换。
参见图 6所示, 包括下列具体信令。
S1-301、 会话中原侧接入网络向原侧切换控制逻辑实体发起切换请求。 ( HANDOFF REQUIRED )
S1-302, 切换控制逻辑实体向切换目的侧接入网络发起切换请求。
-原侧切换控制逻辑实体通过 SIP信令向目的侧切换控制逻辑实体查询切 换目的侧接入网络地址; ( SIP:MESSAGE ( CI LIST ) )
-目的侧切换控制逻辑实体通过 SIP信令向原侧切换控制逻辑实体反馈切 换目的侧接入网络地址; ( SIP:200 OK ( BSC-CI LIST ) )
-根据切换目的侧接入网络地址, 原侧切换控制逻辑实体向切换目的侧接 入网络发起切换请求, 不携带会话中对端的承载信息。 ( HANDOFF REQUEST )
Sl-303、切换目的侧接入网絡建立空口信道后, 向原侧切换控制逻辑实体 反馈切换请求证实; 以及在所述反馈消息中携带切换目的侧的承载信息。 ( HANDOFF REQUEST ACK )
S 1 -304、切换控制逻辑实体告知会话中原侧接入网络切换目的侧信道已建 立, 并开始切换。
-原侧切换控制逻辑实体向会话中原侧接入网络发起切换命令; ( HANDOFF COMMAND )
-会话中原侧接入网络告知原侧切换控制逻辑实体切换已经开始。
( HANDOFF COMMANCE )
S1-305与上述 S1-205相同。 ( SIP:reINVITE ( SDP-T ) ) ( SIP:200 OK ( SDP-S ) ) ( SIP:ACK )
Sl-306、切换控制逻辑实体以会话中对端反馈的承载信息向切换目的侧接 入网络发起承载更新。
-原侧切换控制逻辑实体根据切换目的侧接入网络地址, 以会话中对端反 馈的承载信息直接向切换目的侧接入网络发起承载更新; (BEARER UPD
REQUEST(SDP-S) )
-切换目的侧接入网络以进行承载更新后, 向原侧切换控制逻辑实体反馈 承载更新结果。 ( BEARER UPD RESPONSE )
Sl-307、切换目的侧接入网络收到移动终端切换完成消息,通知切换控制 逻辑实体。
-用户设备在切换目的侧接入网络向原侧切换控制逻辑实体反馈切换完成 消息。 ( HANDOFF COMPLETE )
51- 308 与上述 S1-208 相同 。 ( CLEAR COMMAND ) ( CLEAR COMPLETE )
之后, 若用户在切换目的侧接入网络进行操作时, 目的侧切换控制逻辑 实体通过 SIP信令与原侧切换控制逻辑实体交互。
基于原侧在发起切换时携带会话中对端的承载信息的方法, 参见图 Ί所 示, 包括下列步骤:
52- l、会话中原侧接入网络向切换控制逻辑实体发起切换,携带会话中对 端的承载信息;
S2-2、 切换控制逻辑实体向切换目的侧接入网络发起切换请求;
S2-3、 切换目的侧接入网络建立空口信道, 并向切换控制逻辑实体反馈; S2-4、 切换控制逻辑实体告知会话中原侧接入网络切换目的侧信道已建 立, 并开始切换;
S2-5、切换控制逻辑实体以切换目的侧承载信息向会话中对端发起承载更 新;
S2-6、切换控制逻辑实体比较原存储的会话中对端的承载信息是否与会话 中对端反馈的承载信息相同, 若相同, 则转入 S2-8; 若不同, 则转入 S2-7。
S2-7、切换控制逻辑实体以会话中对端反馈的承载信息向切换目的侧接入 网络发起承载更新;
S2-8、切换目的侧接入网络收到移动终端切换完成消息,通知切换控制逻 辑实体;
S2-9、 清除原信道。
实例四: 局内切换。
S2-40 原侧接入网络向切换控制逻辑实体发起切换请求,并在该请求中 携带所述会话中原侧接入网络保存的会话中对端的承载信息。
S2-402, 切换控制逻辑实体向切换目的侧接入网络发起切换请求。
S2-403、切换目的侧接入网络建立空口信道后,向切换控制逻辑实体反馈 切换请求证实; 以及在所述反馈消息中携带切换目的侧的承载信息。
S2-404、切换控制逻辑实体告知会话中原侧接入网络切换目的侧信道已建 立, 并开始切换。
-切换控制逻辑实体向原侧接入网络发起切换命令;
-原侧接入网络告知切换控制逻辑实体切换已经开始。
S2-405、切换控制逻辑实体以切换目的侧承载信息向会话中对端发起承载 更新。
-切换控制逻辑实体将切换目的侧的承载信息打包到 SIP信令中, 通过会 话层(P-CSCF呼叫会话控制功能代理实体) 向会话中对端发起承载更新;
-会话中对端通过会话层以 SIP信令反馈承载更新结果; 以及在所述承载 更新结果中携带该会话中对端当前的承载信息;
-切换控制逻辑实体响应所述承载更新结果。
S2-406、切换控制逻辑实体比较所述会话中原侧接入网络保存的会话中对 端的承载信息是否与所述会话中对端反馈的当前承载信息相同, 若相同, 则 转入 S2-408; 若不同, 则转入 S2-407。
S2-407、切换控制逆辑实体以所述会话中对端反馈的承载信息向切换目的 侧接入网络发起承载更新; 以及
切换目的侧接入网络反馈更新结果。
S2-408、切换目的侧接入网络收到移动终端切换完成消息,通知切换控制 逻辑实体。
S2-409、 清除原信道。
-切换控制逻辑实体向会话中原侧接入网络发起清除原侧信道; -会话中原侧接入网络在原侧信道清除完成后, 向切换控制逻辑实体反馈 清除完成消息。
实例五: 非查询方式的局间切换。
参见图 8所示, 包括下列具体信令。
S2-50 会话中原侧接入网络向原侧切换控制逻辑实体发起切换请求,并 在该请求中携带所述会话中原侧接入网络保存的会话中对端的承载信息。 ( HANDOFF REQUIRED )
S2-502、 切换控制逻辑实体向切换目的侧接入网络发起切换请求。
-原侧切换控制逻辑实体通过 SIP信令向目的侧切换控制逻辑实体转发所 述发起切换请求; ( SIP:爾 ITE ( SDP-S ) ( HANDOFF REQUIRED ) )
-目的侧切换控制逻辑实体向切换目的侧接入网络转发所述发起切换请 求。 (HANDOFF REQUEST )
S2-503、切换目的侧接入网络建立空口信道,并向切换控制逻辑实体反馈。
-切换目的侧接入网络建立空口信道后, 向目的侧切换控制逻辑实体反馈 切换请求证实; 以及在所述反馈消息中携带切换目的侧的承载信息; ( HANDOFF REQUEST ACK )
-目的侧切换控制逻辑实体通过 SIP信令告知原侧切换控制逻辑实体信道 已经建立;并携带所述切换目的侧的承载信息。 ( SIP: 180 ( SDP-T ) HANDOFF REQUEST ACK )
S2-504、切换控制逻辑实体告知会话中原侧接入网络切换目的侧信道已建 立, 并开始切换。
-原侧切换控制逻辑实体向会话中原侧接入网络发起切换命令; ( HANDOFF COMMAND )
-会话中原侧接入网络告知原侧切换控制逻辑实体切换已经开始。 ( HANDOFF COMMANCE )
-原侧切换控制逻辑实体通过 SIP信令向目的侧切换控制逻辑实体反馈
PRACK (本步驟为 SIP协议规定的步骤); ( SIPiPRACK )
-目的侧切换控制逻辑实体通过 SIP信令响应 200OK (本步驟为 SIP协议 规定的步骤)。 ( SIP-.200 OK )
S2-505、切换控制逻辑实体以切换目的侧承载信息向会话中对端发起承载 更新。
-原侧切换控制逻辑实体将切换目的侧的承载信息打包到 SIP信令中, 通 过会话层(P-CSCF呼叫会话控制功能代理实体)向会话中对端发起承载更新; ( SIP:reINVITE ( SDP-T ) )
-会话中对端通过会话层以 SIP信令反馈承载更新结果; 以及在所述承载 更新结果中携带该会话中对端当前的承载信息。 (SIP:200 OK ( SDP-S' ) )
S2-506、原侧切换控制逻辑实体比较所述会话中原侧接入网络保存的会话 中对端的承载信息是否与所述会话中对端反馈的当前承载信息相同, 若相同, 则转入 S2-508; 若不同, 则转入 S2-507。
S2-507、切换控制逻辑实体以所述会话中对端反馈的承载信息向切换目的 侧接入网络发起承载更新。
-原侧切换控制逻辑实体以会话中对端反馈的当前承载信息通过 SIP信令 向目的侧切换控制逻辑实体发起承载更新; ( 13.SIP:UPDATE(SDP-S') )
-目的侧切换控制逻辑实体向切换目的侧接入网络转发所述承载更新请 求; ( 14.BEARER UPD REQUEST(SDP-S') )
-切换目的侧接入网络进行承载更新后, 向目的侧切换控制逻辑实体反馈 承载更新结果; ( 15.BEARER UPD RESPONSE )
-目的侧切换控制逻辑实体通过 SIP信令向原侧切换控制逻辑实体反馈更 新结果。 ( 16.SIP:200.OK(SDP-T) )
S2-508,切换目的侧接入网络收到移动终端切换完成消息,通知切换控制 逻辑实体。
-用户设备在切换目的侧接入网络向目的侧切换控制逻辑实体反馈切换完 成消息; ( 17.HANDOFF COMPLETE )
-目的侧切换控制迢辑实体通过 SIP信令告知原侧切换控制逻辑实体, 用 户已完成切换。 ( 18.SIP:200 OK )
-原侧切换控制逻辑实体通过 SIP信令向目的侧切换控制逻辑实体反馈。 ( 21.SIP:200 OKACK )
S2-509、 清除原信道。
-原侧切换控制逻辑实体发起清除原侧信道; ( 19.CLEAR COMMAND ) -会话中原侧接入网络在原侧信道清除完成后, 向原侧切换控制逻辑实体 反馈清除完成消息; (20.CLEAR COMPLETE )
之后, 若用户在切换目的侧接入网络进行操作时, 目的侧切换控制逻辑 实体通过 SIP信令与原侧切换控制逻辑实体交互。
实例六: 查询方式的局间切换。
S2-601、 会话中原侧接入网络向原侧切换控制逻辑实体发起切换请求。 S2-602、 切换控制逻辑实体向切换目的侧接入网络发起切换请求。
-原侧切换控制逻辑实体通过 SIP信令向目的侧切换控制逻辑实体查询切 换目的侧接入网络地址;
-目的侧切换控制逻辑实体通过 SIP信令向原侧切换控制逻辑实体反馈切 换目的侧接入网络地址;
-根据切换目的侧接入网络地址, 原侧切换控制逻辑实体向切换目的侧接 入网络发起切换请求, 并携带所述会话中原侧接入网络保存的会话中对端的 载信息。
51- 603、切换目的侧接入网络建立空口信道后,向原侧切换控制逻辑实体 反馈切换请求证实; 以及在所述反馈消息中携带切换目的侧的承载信息。
S 1 -604、切换控制逻辑实体告知会话中原侧接入网络切换目的侧信道已建 立, 并开始切换。
-原侧切换控制逻辑实体向会话中原侧接入网络发起切换命令;
-会话中原侧接入网络告知原侧切换控制逻辑实体切换已经开始。
52- 605、切换控制逻辑实体以切换目的侧承载信息向会话中对端发起承载
更新。
-原侧切换控制逻辑实体将切换目的侧的承载信息打包到 SIP信令中, 通 过会话层( P-CSCF呼叫会话控制功能代理实体)向会话中对端发起承载更新;
-会话中对端通过会话层以 SIP信令反馈承载更新结果; 以及在所述承载 更新结果中携带该会话中对端当前的承载信息。
S2-606、原'
中对端的承载信息是否与所述会话中对端反馈的当前承载信息相同, 若相同, 则转入 S2-608; 若不同, 则转入 S2-607。
S2-607、切换控制逻辑实体以所述会话中对端反馈的承载信息向切换目的 侧接入网络发起承载更新。
-原侧切换控制逻辑实体根据切换目的侧接入网絡地址, 以会话中对端反 馈的承载信息直接向切换目的侧接入网络发起承载更新;
-切换目的侧接入网络以进行承载更新后, 向原侧切换控制逻辑实体反馈 承载更新结果。
S2-608,切换目的侧接入网络收到移动终端切换完成消息,通知切换控制 逻辑实体。
-用户设备在切换目的侧接入网络向原侧切换控制逻辑实体反馈切换完成 消息。
S2-609、 清除原信道。
-原侧切换控制逻辑实体发起清除原侧信道;
-会话中原侧接入网络在原侧信道清除完成后, 向原侧切换控制逻辑实体 反馈清除完成消息;
-原侧切换控制逻辑实体通过 SIP信令向告知目的侧切换控制逻辑实体, 原侧信道已清除。
之后, 若用户在切换目的侧接入网络进行操作时, 目的侧切换控制逻辑 实体通过 SIP信令与原侧切换控制逻辑实体交互。
本发明提供了另一种方法。 通过 SIP信令完成原侧与 ϋ的侧之间的交互。
进一步通过原侧切换控制逻辑实体和目的侧切换控制逻辑实体分别在其 对应的 MGW上增加端点, 并在切换时更改端点, 来实现移动终端的切换。
参见图 9所示, 包括下列步骤:
S3-l、 会话中原侧接入网络通过切换控制逻辑实体以 SIP信令发起切换, 以及原侧切换控制逻辑实体和目的侧切换控制逻辑实体分别在其对应的 MGW上增加端点。
-会话中原侧接入网络向原侧切换控制逻辑实体发起切换请求; ( HANDOFF REQUIRED )
-原侧切换控制逻辑实体在原侧 MGW上增加端点; ( ADD($4) )
-原侧 MGW反馈该端点的承载信息; (REPLAY ( SDP-4 ) )
-原侧切换控制 £辑实体通过 SIP信令向目的侧切换控制逻辑实体转发所 述发起切换请求; (SIP:INVITE ( SDP-4 ) HANDOFF REQUIRED )
-目的侧切换控制逻辑实体向切换目的侧接入网络转发所述发起切换请 求; (HANDOFF REQUEST )
-目的侧切换控制逻辑实体在目的侧 MGW 上增加端点; (ADD ( $5REMOTE=SDP-4 ) )
-目的侧 MGW反馈该端点的承载信息; ( REPLY ( SDP-5 ) )
-切换目的侧接入网络建立空口信道后, 向目的侧切换控制逻辑实体反馈 切换请求证实; ( HANDOFF REQUEST ACK )
-目的侧切换控制逻辑实体通过 SIP信令告知原侧切换控制逻辑实体信道 已经建立,并在所述告知消息中携带目的侧增加的端点的承载信息。 (SIP:183 ( SDP-5 ) HANDOFF REQUEST ACK )
S3-2、 切换控制逻辑实体告知会话中原侧接入网络切换目的侧信道已建 立, 并开始切换。
-原侧切换控制逻辑实体向会话中原侧接入网络发起切换命令; ( HANDOFF COMMAND )
-会话中原侧接入网络告知原侧切换控制逻辑实体切换已经开始。
( HANDOFF COMMANCE )
S3-3、原侧切换控制逻辑实体将其增加的端点修改为目的侧切换控制逻辑 实体增加的端点。
-原侧切换控制逻辑实体根据目的侧增加的端点的承载信息, 将原侧增加 的端点修改为目的侧端点; ( MODIFY ( $4REMOTE=SDP-5 ) )
-原侧 MGW向原侧切换控制逻辑实体反馈修改结果。 ( REPLAY )
S3-4、目的侧切换控制逻辑实体通过 SIP信令告知原侧切换控制逻辑实体 切换完成后, 原侧切换控制逻辑实体通过 SIP信令响应。
-用户设备在切换目的侧接入网络向目的侧切换控制逻辑实体反馈切换完 成消息; ( HANDOFF COMPLETE )
-目的侧切换控制逻辑实体通过 SIP信令告知原侧切换控制逻辑实体, 用 户已完成切换; ( SIP:200 OK )
-原侧切换控制逻辑实体通过 SIP信令向目的侧切换控制逻辑实体发送已 获知切换完成消息。 ( SIP:ACK )
S3-5、 清除原信道。
-原侧切换控制逻辑实体发起清除原侧信道; ( CLEAR COMMAND ) -会话中原侧接入网络在原侧信道清除完成后, 向原侧切换控制逻辑实体 反馈清除完成消息; (CLEAR COMPLETE )
-原侧切换控制逻辑实体删除原侧 MGW 中的切换原侧端点; ( SUBSTRACT )
-原侧 MGW向原侧切换控制逻辑实体反馈删除结果。 ( REPLY ) 之后, 若用户在切换目的侧接入网络进行操作时, 目的侧切换控制逻辑 实体通过 SIP信令与原侧切换控制逻辑实体交互。
为了支撑本发明方法, 本发明提供了一种切换控制逻辑实体, 参见图 10 所示, 其包括: 分别与切换控制逻辑模块相连的电路域切换信令处理模块、 承载更新模块、 局间切换信令处理模块和媒体网关控制模块。
所述电路域切换信令处理模块, 用于处理电路域接入网络的切换信令。
所述承载更新模块, 用于向会话对端发起承载更新。
所述局间切换信令处理模块, 可通过 SIP信令与切换目的侧装置协商切 换信息。还可通过新增的 SIP信令承载切换信息,或者通过扩展 SIP信令中的 字段来承载切换信息, 或者直接使用原有 SIP信令承载切换信息, 向目的侧 装置查询目的侧无线接入网实体标识。
所述媒体网关控制模块, 用于控制媒体网关, 使媒体网关可根据该模块 的指令完成原侧接入网络、 切换目的侧接入网络和核心网络之间的承载交换。
所述切换控制逻辑模块, 用于控制电路域切换信令处理模块、 承载更新 模块、 局间切换信令处理模块和媒体网关控制模块, 来完成切换。
为了支撑本发明方法, 本发明提供了一种切换系统, 参见图 11所示, 其 包括:
IMS网络、 电路域接入网络和媒体网关, 以及分别与它们连接的切换控 制逻辑实体。
所述切换控制逻辑实体中的电路域切换信令处理模块与所述电路域接入 网络相连; 所述切换控制逻辑实体中的承载更新模块与所述 IMS网络相连; 所述切换控制逻辑实体中的媒体网关控制模块与所述媒体网关相连。
所述系统至少包括一个切换控制逻辑实体, 通过 SIP协议完成所述切换 控制逻辑实体与 IMS网络之间的承载信息交互。
若原侧与切换目的侧不在同一切换控制逻辑实体覆盖范围内, 则所述原 侧与切换目的侧分别对应一个切换控制逻辑实体, 并且所述原侧与切换目的 侧分别对应的切换控制逻辑实体通过所述切换控制逻辑实体内部的局间切换 信令处理模块相连。 这样所述原侧与切换目的侧分别对应的切换控制逻辑实 体可通过 SIP信令交互切换信息。
所述媒体网关, 用于接收所述切换控制逻辑实体内媒体网关控制模块发 来的控制命令, 以完成原侧、 切换目的侧和核心网络之间的承载交换。
显然, 本领域的技术人员可以对本发明进行各种改动和变型而不脱离本 发明的精神和范围。 这样, 倘若本发明的这些修改和变型属于本发明权利要
求及其等同技术的范围之内, 则本发明也意图包含这些改动和变型在内。
Claims
1、 一种无线切换方法, 其特征在于, 包括下列步骤:
A、 ^^中原侧接入网络通过切换控制逻辑实体向切换目的侧接入网絡发 起切换, 并且不携带会话中对端的承载信息;
B、切换控制逻辑实体以切换目的侧承载信息向所述会话中对端发起承载 更新;
C、切换控制遝辑实体以会话中对端反馈的承载信息向切换目的侧接入网 络发起承载更新, 完成切换。
2、 如权利要求 1所述的方法, 其特征在于, 步骤 B中所述切换目的侧承 载信息是在发起切换后, 由切换目的侧接入网络反馈给所述切换控制逻辑实 体。
3、 如权利要求 2所述的方法, 其特征在于, 步據 B中所述切换控制逻辑 实体通过会话层以 SIP信令向会话中对端发起承载更新。
4、 如权利要求 3所述的方法, 其特征在于, 步骤 B中所述会话中对端通 过会话层以 SIP信令向切换控制逻辑实体反馈该会话中对端当前的承载信息。
5、 如权利要求 4所述的方法, 其特征在于, 所述会话中原侧接入网络和 切换目的侧接入网在同一切换控制逻辑实体覆盖范围内。
6、 如权利要求 5所述的方法, 其特征在于, 所述步骤 A包括下列步骤: -原侧接入网絡向切换控制逻辑实体发起切换请求;
-切换控制逻辑实体向目的侧接入网络转发该切换请求;
-目的侧接入网络建立空口信道后, 向切换控制逻辑实体反馈切换请求证 实;
-切换控制逻辑实体向原侧接入网络发起切换命令;
-原侧接入网絡告知切换控制逻辑实体切换已经开始。
7、 如权利要求 6所述的方法, 其特征在于, 所述步骤 B包括下列步骤: -切换控制逻辑实体向会话中对端发起承载更新;
-会话中对端反馈承载更新结果;
-切换控制逻辑实体响应所述承载更新结果。
8、 如权利要求 7所述的方法, 其特征在于, 所述步骤 C包括下列步骤: -切换控制逻辑实体以会话中对端反馈的承载信息向切换目的侧接入网络 发起承载更新;
-切换目的侧接入网络反馈更新结果;
-用户设备完成空口切换, 并在切换目的侧接入网络反馈切换完成。
9、如权利要求 8所述的方法,其特征在于,所述步驟 C之后还包括步骤: D、 切换控制逻辑实体在切换工作完成后, 清除原侧信道。
10、 如权利要求 9所述的方法, 其特征在于, 所述步骤 D包括下列步骤: -完成切换工作后, 切换控制逻辑实体发起清除原侧信道;
-会话中原侧接入网络在原侧信道清除完成后, 向切换控制逻辑实体反馈 清除完成消息。
11、 如权利要求 4所述的方法, 其特征在于, 所述会话中原侧接入网络 和切换目的侧接入网分别在不同的切换控制逻辑实体覆盖范围内。
12、 如权利要求 11所述的方法, 其特征在于, 原侧切换控制逻辑实体与 目的侧切换控制逻辑实体之间通过 SIP信令传输切换信息。
13、如权利要求 12所述的方法,其特征在于,所述步骤 B包括下列步骤: . -原侧切换控制逻辑实体向会话中对端发起承载更新;
-会话中对端反馈承载更新结果;
-原侧切换控制逻辑实体响应所述承载更新结果。
14、如权利要求 13所述的方法,其特征在于,所述步骤 A包括下列步骤: -会话中原侧接入网络向原侧切换控制逻辑实体发起切换清求;
-原侧切换控制逻辑实体向目的侧切换控制逻辑实体转发所述发起切换请 求;
-目的侧切换控制逻辑实体向切换目的侧接入网络转发所述发起切换请 求;
-切换目的侧接入网络建立空口信道后, 向目的侧切换控制逻辑实体反馈 切换请求证实;
-目的侧切换控制逻辑实体告知原侧切换控制逻辑实体信道已经建立; -原侧切换控制逻辑实体向会话中原侧接入网络发起切换命令;
-会话中原侧接入网络告知原侧切换控制逻辑实体切换已经开始。
15、如权利要求 14所述的方法,其特征在于,所述步驟 C包括下列步骤: -原侧切换控制逻辑实体以会话中对端反馈的承载信息向目的侧切换控 制逻辑实体发起承载更新;
-目的侧切换控制逻辑实体回应所述承载更新请求;
-目的侧切换控制逻辑实体向切换目的侧接入网络转发所述承载更新请 求;
-切换目的侧接入网络进行承载更新后, 向目的侧切换控制逻辑实体反馈 承载更新结果;
-用户设备在切换目的侧接入网络向目的侧切换控制逻辑实体反馈切换完 成消息;
-目的侧切换控制逻辑实体告知原侧切换控制逻辑实体,用户已完成切换; -原侧切换控制逻辑实体向目的侧切换控制逻辑实体回应已获知切换完 成。
16、如权利要求 13所述的方法,其特征在于,所述步驟 A包括下列步骤: -会话中原侧接入网络向原侧切换控制逻辑实体发起切换请求;
-原侧切换控制逻辑实体向目的侧切换控制逻辑实体查询切换目的侧接入 网络地址;
-目的侧切换控制逻辑实体向原侧切换控制逻辑实体反馈切换目的侧接入 网络地址;
-原侧切换控制逻辑实体向切换目的侧接入网络发起切换请求;
-切换目的侧接入网络建立空口信道后, 向原侧切换控制逻辑实体反馈切 换请求证实;
-原侧切换控制逻辑实体向会话中原侧接入网络发起切换命令;
-会话中原侧接入网络告知原侧切换控制逻辑实体切换已经开始。
17、如权利要求 16所述的方法,其特征在于,所述步驟 C包括下列步骤: -原侧切换控制逻辑实体以会话中对端反馈的承载信息向切换目的侧接入 网络发起承载更新;
-切换目的侧接入网絡进行承载更新后, 向原侧切换控制逻辑实体反馈承 载更新结果;
-用户设备在切换目的侧接入网络向原侧切换控制逻辑实体反馈切换完成 消息。
18、 如权利要求 15或 17所述的方法, 其特征在于, 所述步驟 C之后还 包括步骤:
D、 切换控制逻辑实体在切换工作完成后, 清除原侧信道。
19、如权利要求 18所述的方法,其特征在于,所述步驟 D包括下列步骤: -完成切换工作后, 原侧切换控制逻辑实体发起清除原侧信道;
-会话中原侧接入网络在原侧信道清除完成后, 向原侧切换控制逻辑实体 反馈清除完成消息。
20、 如权利要求 19所述的方法, 其特征在于, 所述步骤 D之后, 用户在 切换目的侧接入网络进行操作时, 目的侧切换控制逻辑实体通过 SIP信令与 原侧切换控制逻辑实体交互。
21、 一种无线切换方法, 其特征在于, 包括下列步骤:
A、在会话中原侧接入网络通过切换控制逻辑实体向切换目的侧接入网络 发起切换, 并且携带所述会话中原侧接入网络保存的会话中对端的承载信息;
B、切换控制逻辑实体以切换目的侧承载信息向所述会话中对端发起承载 更新, 完成切换。
22、 如权利要求 21所述的方法, 其特征在于, 所述步骤 B中, 在向会话 中对端发起承载更新后, 判断会话中对端反馈的当前承载信息是否与所述会 话中原侧接入网络保存的^舌中对端的承载信息相同, 若相同, 则完成切换;
否则, 切换控制逻辑实体以会话中对端反馈的当前承载信息向切换目的 侧接入网络发起承载更新, 完成切换。
23、 如权利要求 22所述的方法, 其特征在于, 步骤 Β中所述切换目的侧 承载信息是在发起切换后, 由切换目的侧接入网络反馈给所述切换控制逻辑 实体。
24、 如权利要求 23所述的方法, 其特征在于, 步骤 Β中所述切换控制逻 辑实体通过会话层以 SIP信令向会话中对端发起承载更新。
25、 如权利要求 24所述的方法, 其特征在于, 步骤 B中所述会话中对端 通过会话层以 SIP信令向切换控制逻辑实体反馈该会话中对端当前的承载信 白
26、 如权利要求 25所述的方法, 其特征在于, 所述会话中原侧接入网络 和切换目的侧接入网在同一切换控制逻辑实体覆盖范围内。
27、如权利要求 26所述的方法,其特征在于,所述步骤 A包括下列步骤: -原侧接入网络向切换控制逻辑实体发起切换请求, 并在该请求中携带所 述会话中原侧接入网络保存的会话中对端的承载信息;
-切换控制逻辑实体向目的侧接入网絡转发该切换请求;
-切换目的侧接入网络建立空口信道后, 向切换控制逻辑实体反馈切换请 求证实;
-切换控制逻辑实体向原侧接入网络发起切换命.令;
-原侧接入网络告知切换控制逻辑实体切换已经开始。
28、如权利要求 27所述的方法,其特征在于,所述步骤 B包括下列步骤: -切换控制逻辑实体向会话中对端发起承载更新;
-会话中对端反馈承载更新结果, 并携带该会话中对端当前的承载信息; -切换控制逻辑实体响应所述承载更新结果;
-判断所述会话中对端反馈的当前承载信息是否与所述会话中原侧接入网 络保存的会话中对端的承载信息相同, 若相同, 则完成切换;
否则, 切换控制逻辑实体以所述会话中对端反馈的当前承载信息向切换
目的侧接入网络发起承载更新;
-切换目的侧接入网络反馈更新结果;
-用户设备完成空口切换, 并在切换目的侧接入网络反馈切换完成。
29、 如权利要求 28所述的方法, 其特征在于, 所述步骤 B之后还包括步 骤:
C、 切换控制逻辑实体在切换工作完成后, 清除原侧信道。
30、如权利要求 29所述的方法,其特征在于,所述步骤 C包括下列步骤: -完成切换工作后, 切换控制逻辑实体发起清除原侧信道;
-会话中原侧接入网络在原侧信道清除完成后, 向切换控制逻辑实体反馈 清除完成消息。
31、 如权利要求 25所述的方法, 其特征在于, 所述会话中原侧接入网络 和切换目的侧接入网络分别在不同的切换控制逻辑实体覆盖范围内。
32、 如权利要求 31所述的方法, 其特征在于, 原侧切换控制逻辑实体与 目的侧切换控制逻辑实体之间通过 SIP信令传输切换信息。
33、如权利要求 32所述的方法,其特征在于,所述步驟 A包括下列步骤: -会话中原侧接入网络向原侧切换控制逻辑实体发起切换请求 , 并在该请 求中携带所述会话中原侧接入网络保存的会话中对端的承载信息;
-原侧切换控制逻辑实体向目的侧切换控制逻辑实体转发所述发起切换请 求;
-目的侧切换控制逻辑实体向切换目的侧接入网络转发所述发起切换请 求;
-切换目的侧接入网络建立空口信道后, 向目的侧切换控制逻辑实体反馈 切换请求证实;
-目的侧切换控制逻辑实体告知原侧切换控制逻辑实体信道已经建立; -原侧切换控制逻辑实体向会话中原侧接入网络发起切换命令;
-会话中原侧接入网络告知原侧切换控制逻辑实体切换已经开始。
34、如权利要求 33所述的方法,其特征在于,所述步骤 B包括下列步骤:
-原侧切换控制逻辑实体向会话中对端发起承载更新;
-会话中对端反馈承载更新结果, 并携带该会话中对端当前的承载信息; -原侧切换控制逻辑实体响应所述承载更新结果;
-判断所述会话中对端反馈的当前承载信息是否与所述会话中原侧接入网 络保存的会话中对端的承载信息相同, 若相同, 则完成切换;
否则, 原侧切换控制逻辑实体以所述会话中对端反馈的当前承载信息向 目的侧切换控制逻辑实体发起承载更新;
-目的侧切换控制逻辑实体向切换目的侧接入网络转发所述承载更新请 求;
-切换目的侧接入网络进行承载更新后, 向目的侧切换控制逻辑实体反馈 承载更新结果;
-目的侧切换控制逻辑实体向原侧切换控制逻辑实体反馈更新结果; -用户设备在切换目的侧接入网络向目的侧切换控制逻辑实体反馈切换完 成消息;
-目的侧切换控制逻辑实体告知原侧切换控制逻辑实体,用户已完成切换。
35、如权利要求 32所述的方法,其特征在于,所述步骤 A包括下列步骤: -会话中原侧接入网络向原侧切换控制逻辑实体发起切换请求;
-原侧切换控制逻辑实体向目的侧切换控制逻辑实体查询切换目的侧接入 网络地址;
-目的侧切换控制逻辑实体向原侧切换控制逻辑实体反馈切换目的侧接入 网络地址;
-原侧切换控制逻辑实体向切换目的侧接入网络发起切换请求, 并在该请 求中携带所述会话中原侧接入网络保存的会话中对端的承载信息;
-切换目的侧接入网络建立空口信道后, 向原侧切换控制逻辑实体反馈切 换请求证实;
-原侧切换控制逻辑实体向会话中原侧接入网络发起切换命令;
-会话中原侧接入网络告知原侧切换控制逻辑实体切换已经开始。
36、如权利要求 35所述的方法,其特征在于,所述步骤 B包括下列步骤: -原侧切换控制逻辑实体向会话中对端发起承载更新;
-会话中对端反馈承载更新结果, 并携带该会话中对端当前的承载信息; -原侧切换控制逻辑实体响应所述承载更新结果;
-判断所述会话中对端反馈的当前承载信息是否与所述会话中原侧接入网 络保存的会话中对端的承载信息相同, 若相同, 则完成切换;
否则, 原侧切换控制逻辑实体以所述会话中对端反馈的当前承载信息向 切换目的侧接入网络发起承载更新请求;
-切换目的侧接入网络向原侧切换控制逻辑实体反馈更新结果;
-用户设备在切换目的侧接入网络向原侧切换控制逻辑实体反馈切换完成 消息。
37、 如权利要求 34或 36所述的方法, 其特征在于, 所述步骤 B之后还 包括步骤: C、 切换控制逻辑实体在切换工作完成后, 清除原侧信道。
38、如权利要求 37所述的方法,其特征在于,所述步骤 C包括下列步骤: -完成切换工作后, 原侧切换控制逻辑实体发起清除原侧信道;
-会话中原侧接入网络在原侧信道清除完成后, 向原侧切换控制逻辑实体 反馈清除完成消息;
-原侧切换控制逻辑实体告知目的侧切换控制還辑实体,原侧信道已清除。
39、 如权利要求 38所述的方法, 其特征在于, 所述步骤 C之后, 用户在 切换目的侧接入网络进行操作时, 目的侧切换控制逻辑实体通过 SIP信令与 原侧切换控制逻辑实体交互。
40、 一种无线切换方法, 其特征在于, 包括下列步骤:
A、会话中原侧接入网络通过切换控制逻辑实体以 SIP信令发起切换, 以 关 MGW上增加端点;
B、原侧切换控制逻辑实体将其增加的端点修改为目的侧切换控制逻辑实 体增加的端点, 完成切换;
C、 目的侧切换控制逻辑实体通过 SIP信令告知原侧切换控制逻辑实体切 换完成后, 原侧切换控制逻辑实体通过 SIP信令响应。
41、如权利要求 40所述的方法,其特征在于,所述步骤 A包括下列步骤: -会话中原侧接入网络向原侧切换控制逻辑实体发起切换请求;
-原侧切换控制逻辑实体在原侧 MGW上增加端点;
-原侧 MGW反馈该端点的承载信息;
-原侧切换控制逻辑实体通过 SIP信令向目的侧切换控制逻辑实体转发所 述发起切换请求;
-目的侧切换控制逻辑实体向切换目的侧接入网络转发所述发起切换请 求;
-目的侧切换控制逻辑实体在目的侧 MGW上增加端点;
-目的侧 MGW反馈该端点的承载信息;
-切换目的侧接入网络建立空口信道后, 向目的侧切换控制逻辑实体反馈 切换请求证实;
-目的侧切换控制逻辑实体通过 SIP信令告知原侧切换控制逻辑实体信道 已经建立, 并在所述告知消息中携带目的侧增加的端点的承载信息;
-原侧切换控制逻辑实体向会话中原侧接入网络发起切换命令;
-会话中原侧接入网络告知原侧切换控制逻辑实体切换已经开始。
42、如权利要求 41所述的方法,其特征在于,所述步骤 B包括下列步骤: -原侧切换控制逻辑实体根据目的侧增加的端点的承载信息, 将原侧增加 的端点修改为目的侧端点;
-原侧 MGW向原侧切换控制逻辑实体反馈修改结果。
43、如权利要求 42所述的方法,其特征在于,所述步骤 C包括下列步驟: -用户设备在切换目的侧接入网络向目的侧切换控制逻辑实体反馈切换完 成消息;
-目的侧切换控制逻辑实体通过 SIP信令告知原侧切换控制逻辑实体, 用 户已完成切换;
-原侧切换控制逻辑实体通过 SIP信令向目的侧切换控制逻辑实体发送已 获知切换完成消息。
44、 如权利要求 43所述的方法, 其特征在于, 所述步骤 C之后还包括步 驟: D、 切换控制逻辑实体在切换工作完成后, 清除原侧信道。
45、如权利要求 44所述的方法,其特征在于,所述步骤 D包括下列步驟: -原侧切换控制逻辑实体发起清除原侧信道;
-会话中原侧接入网络在原侧信道清除完成后, 向原侧切换控制逻辑实体 反馈清除完成消息;
-原侧切换控制逻辑实体删除原侧 MGW中的会话中原侧端点;
-原侧 MGW向原侧切换控制逻辑实体反馈删除结果。
46、 如权利要求 45所述的方法, 其特征在于, 所述步骤 D之后, 用户在 切换目的侧接入网络进行操作时, 目的侧切换控制逻辑实体通过 SIP信令与 原侧切换控制逻辑实体交互。
47、 一种无线切换控制逻辑实体, 其特征在于, 包括:
电路域切换信令处理模块, 用于处理电路域接入网络的切换信令; 承载更新模块, 用于向会话对端发起承载更新;
局间切换信令处理模块, 可通过 SIP信令与切换目的侧装置协商切换信 息;
切换控制 £辑模块, 用于控制电路域切换信令处理模块、 承载更新模块 和局间切换信令处理模块, 来完成切换。
48、 如权利要求 47所述的逻辑实体, 其特征在于, 所述局间切换信令处 理模块还可通过 SIP信令向所述目的侧装置查询目的侧无线接入网实体标识。
49、 如权利要求 47或 48所述的逻辑实体, 其特征在于, 所述通过 SIP 信令与目的侧装置协商切换信息是通过 SIP信令新增的信元承载切换信息, 或者通过扩展 SIP信令中的信元来承载切换信息,或者直接使用原有 SIP信令 中的信元承载切换信息。
50、如权利要求 49所述的逻辑实体,其特征在于, 所述逻辑实体还包括:
媒体网关控制模块, 其与所述切换控制逻辑模块相连, 用于控制媒体网 关, 使媒体网关可根据该模块的指令完成原侧接入网络、 切换目的侧接入网 络和核心网络之间的承载交换。
51、 一种无线切换系统, 包括: IMS网络和电路域接入网络,
其特征在于, 所述系统还包括:
至少一个切换控制逻辑实体, 分别连接于所述 IMS网络和电路域接入网 絡之间, 用于交互切换信息。
52、 如权利要求 51所述的系统, 其特征在于, 所述系统通过 SIP协议完 成所述切换控制逻辑实体与 IMS网络之间的承载信息交互。
53、 如权利要求 52所述的系统, 其特征在于, 若原侧与切换目的侧不在 同一切换控制逻辑实体覆盖范围内, 则所述原侧与切换目的侧分别对应的切 换控制逻辑实体之间相连。
54、 如权利要求 53所述的系统, 其特征在于, 所述原侧与切换目的侧分 别对应的切换控制逻辑实体通过所述切换控制逻辑实体内部的局间切换信令 处理模块相连。
55、 如权利要求 54所述的系统, 其特征在于, 所述原侧与切换目的侧分 别对应的切换控制逻辑实体通过 SIP信令交互信息。
56、 如权利要求 55所述的系统, 其特征在于, 所述系统还包括: 媒体网 关, 其与所述切换控制逻辑实体相连, 用于接收所述切换控制逻辑实体内媒 体网关控制模块发来的控制命令, 以完成原侧、 切换目的侧和核心网络之间 的承载交换。
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US20050105490A1 (en) * | 2003-10-20 | 2005-05-19 | Samsung Electronics Co., Ltd. | Method, medium, and system for searching crossover router and method, medium, and system for reserving resources in mobile network |
CN1801998A (zh) * | 2004-12-31 | 2006-07-12 | 华为技术有限公司 | 从多媒体子系统域到电路子系统域的会话切换方法 |
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CN100456883C (zh) | 2009-01-28 |
CN1882175A (zh) | 2006-12-20 |
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