WO2017206150A1 - S8hr漫游架构下的srvcc切换方法和装置 - Google Patents
S8hr漫游架构下的srvcc切换方法和装置 Download PDFInfo
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- WO2017206150A1 WO2017206150A1 PCT/CN2016/084569 CN2016084569W WO2017206150A1 WO 2017206150 A1 WO2017206150 A1 WO 2017206150A1 CN 2016084569 W CN2016084569 W CN 2016084569W WO 2017206150 A1 WO2017206150 A1 WO 2017206150A1
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- 238000004873 anchoring Methods 0.000 claims abstract description 374
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- 230000007704 transition Effects 0.000 claims description 166
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- 230000007774 longterm Effects 0.000 claims description 18
- 230000007246 mechanism Effects 0.000 claims description 12
- 238000013519 translation Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 description 49
- 230000011664 signaling Effects 0.000 description 44
- 230000006870 function Effects 0.000 description 43
- 238000013461 design Methods 0.000 description 31
- 238000010586 diagram Methods 0.000 description 18
- 230000008859 change Effects 0.000 description 16
- 238000003780 insertion Methods 0.000 description 14
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/14—Reselecting a network or an air interface
- H04W36/144—Reselecting a network or an air interface over a different radio air interface technology
- H04W36/1443—Reselecting a network or an air interface over a different radio air interface technology between licensed networks
Definitions
- the present invention relates to the field of wireless communications, and in particular, to an SRVCC handover method and apparatus under the S8HR roaming architecture.
- S8HR Home Routed over S8 interface
- VoLTE Long Term Evolution based voice
- SRVCC Single Radio Voice Call Continuity
- SRVCC Single Radio Voice Call Continuity
- the prior art provides an SRVCC handover method in an S8HR roaming architecture, and the process may be: an MSC (Mobile Switching Center) in a roaming network according to an STN-SR generated by an anchor device in the home network.
- (session transfer number for SRVCC, session conversion identifier for SRVCC) locating an anchor transfer control function ATCF (access transfer control function) in the home network, and sending a session conversion request flow to the ATCF, the session conversion Requesting to carry the session identifier of the session in which the user equipment is in progress;
- the ATCF obtains an ongoing session between the user equipment and the peer device according to the session identifier, and stores the session stored in the access transfer gateway (ATGW) PS (packet switched) access leg media path information is converted into CS (circuit switched) access leg media path information
- SCC AS service centralization and continuity application server, SCC application in the home network
- the CS access leg media path information implements communication between the user equipment and the peer
- the path that causes the MCS to send a session transition request to the ATCF is long, so that the PS access leg media path information of the session is converted to the CS access leg media path information, which requires a large amount of time, and the media plane interruption during SRVCC handover The delay is large, which in turn leads to a poor user experience.
- the present invention provides an SRVCC handover method and apparatus under the S8HR roaming architecture.
- the technical solutions are as follows:
- the present invention provides an SRVCC handover method in an S8HR roaming architecture, where the method includes:
- the first anchoring device in the home network corresponding to the user equipment receives the first call request, where the first call request is used to request to establish a long-term evolution-based voice VoLTE call, and allocate the first user plane resource to the VoLTE call. information;
- the first anchoring device sends a second call request to the second anchoring device in the roaming network where the user equipment is currently located, where the second call request carries the first user plane resource information;
- the first anchoring device Receiving, by the first anchoring device, a second call response sent by the second anchoring device, where the second call response carries second user plane resource information allocated by the second anchoring device to the VoLTE call,
- the first user plane resource information and the second user plane resource information are used to establish a user plane path for the VoLTE call between the second anchoring device and the first anchoring device, the user The surface path is used to transmit media data of the VoLTE call;
- the update request sends a second access transition update request to the application server AS or the serving call session control function S-CSCF, the first access transition update request and the second access transition update request being used for requesting Establishing a new session with the AS or between the second anchoring device and the S-CSCF and causing the AS or the S-CSCF to associate the new session with the remote end Conversation.
- a user plane path is established for the VoLTE call between the first anchoring device and the second anchoring device, and when the SRVCC handover occurs, the first anchoring device receives the first sent by the second anchoring device.
- a new session is established between the S-CSCFs and causes the AS or S-CSCF to associate the new session with the remote session.
- the remote leg and the media surface of the second anchoring device and the remote user device do not change, thereby shortening the SRVCC
- the signaling and media plane switching distance of the handover process greatly shortens the interruption delay and improves the user experience.
- the method before the first anchoring device in the home network corresponding to the user equipment receives the first call request, the method further includes:
- the first anchoring device acquires identification information of the second anchoring device, the second anchoring device is used for SRVCC switching of a roaming user under the S8HR roaming architecture, and according to the identifier of the second anchoring device Transmitting, to the second anchoring device, a second registration request of the user equipment, where the second registration request is used to request the user equipment to register with the second anchoring device;
- the first anchoring device receives a second registration response corresponding to the second registration request sent by the second anchoring device, and the second registration response carries the SRVCC switch generated by the second anchoring device Session conversion identifier;
- the first anchoring device sends a third registration request to the query/service call session control function device I/S-CSCF, where the third registration request carries the session conversion identifier, and the third registration request is used to The user equipment requests to be registered with the I/S-CSCF.
- the first anchoring device determines that the user equipment is the S8HR roaming user equipment and determines the current location of the user equipment, and selects the second network in the roaming network where the user equipment is currently located according to the current location of the user equipment.
- the device is anchored and the second anchoring device is serialized into the registration path, so that when the SRVCC switching occurs, the interruption delay can be shortened and the user experience can be improved.
- the S8HR roaming user equipment is a user equipment that roams into the roaming network and needs to adopt a S8 interface-based home routing HR communication mechanism for VoLTE.
- the first anchoring device acquires the identification information of the second anchoring device, including:
- the first anchoring device acquires location information that the user equipment is currently located
- the first anchoring device acquires the identification information of the second anchoring device according to the location information.
- the first anchoring device is configured with location information and an identification letter of the anchoring device. According to the location information of the user equipment, the identifier information of the second anchoring device corresponding to the location information may be obtained.
- the session transition identifier is used to identify the second anchoring device in the roaming network, so that the mobile switching center MSC in the roaming network can be based on the SRVCC handover procedure
- the session conversion identifier locates the second anchoring device.
- the second anchoring device generates a session transition identifier, and when the SRVCC handover occurs, since the second anchoring device and the MSC are both in the home network, the MSC can address the session according to the session transition identifier. Go to the second anchoring device.
- the first anchoring device determines, according to the first registration request, that the user equipment is an S8HR roaming user equipment, including:
- the first anchoring device acquires location information that the user equipment is currently located, and subscription information of the user equipment;
- the first anchoring device determines that the user equipment is an S8HR roaming user equipment according to the location information and the subscription information.
- the first anchoring device may determine that the user equipment is an S8HR roaming user equipment according to the location information of the user equipment and the subscription information of the user equipment.
- the first anchoring device comprises a first access switch forwarding control function device ATCF.
- the first anchoring device includes the first ATCF. Therefore, in the process of SRVCC handover, the first ATCF acts as a signaling anchor before and after the handover, and ensures continuity of the session before and after the access transition.
- the present invention provides an SRVCC handover method in an S8HR roaming architecture, where the method includes:
- the second anchoring device in the roaming network where the user equipment is currently located receives a second call request sent by the first anchoring device of the home network of the user equipment, and the second call request is used to request to establish a long-term evolution based a voice VoLTE call, and the second call request carries first user plane resource information allocated by the first anchoring device for the VoLTE call;
- the second anchoring device receives the SRVCC access conversion message of the VoLTE call sent by the mobile switching center MSC where the user equipment roams, The second anchoring device sends a first access transition update request to the first anchoring device, the first access transition update request for requesting the first anchoring device to apply to an application server AS or a service call session
- the control function S-CSCF sends a second access transition update request, the first access transition update request and the second access transition update request for requesting the second anchor device with the AS or Establishing a new session between the second anchoring device and the S-CSCF and causing the AS or the S-CSCF to associate the new session with a remote session.
- the second anchoring device is added in the roaming network as an anchor point of the signaling and media plane before and after the SRVCC handover, so that when the SRVCC handover occurs, the MSC sends the SRVCC access transition to the second anchoring device.
- the message since the MSC and the second anchoring device are both in the roaming network, the distance between the MSC and the second anchoring device is relatively close, so that the path that the MSC sends the session switching request to the second anchoring device is short. , greatly shortening the interruption delay and improving the user experience.
- the method before the second anchoring device in the roaming network in which the user equipment is currently located receives the second call request sent by the first anchoring device of the home network of the user equipment, the method further includes:
- the second anchoring device receives a second registration request sent by the first anchoring device, and the second anchoring device is used for SRVCC switching of a roaming user under the S8HR roaming architecture;
- the second anchoring device generates a session conversion identifier for SRVCC handover according to the second registration request
- the second anchoring device Transmitting, by the second anchoring device, a second registration response corresponding to the second registration request to the first anchoring device, where the second registration response carries the session conversion identifier, so that the first anchoring
- the device sends a third registration request to the query/service call session control function device I/S-CSCF, where the third registration request carries the session conversion identifier, and the third registration request is used to request registration for the user equipment.
- I/S-CSCF the query/service call session control function device
- the second anchoring device generates a session conversion identifier for the SRVCC handover, and serializes the second anchoring device into the registration path, so that the subsequent shortening can be performed when the SRVCC handover occurs. Break the delay and improve the user experience.
- the session transition identifier is used to identify the second anchoring device in the roaming network, so that the MSC can locate the second according to the session transition identifier during an SRVCC handover procedure Anchoring equipment.
- the second anchoring device generates a session transition identifier, and when the SRVCC handover occurs, since the second anchoring device and the MSC are both in the home network, the MSC can address the session according to the session transition identifier. Go to the second anchoring device.
- the second anchoring device comprises a second access switching forwarding control function device ATCF.
- the second anchoring device includes the second ATCF. Therefore, in the process of the SRVCC handover, the second ATCF acts as a signaling anchor before and after the handover, and ensures the continuity of the session before and after the access transition.
- an embodiment of the present invention provides an SRVCC switching method in an S8HR roaming architecture, where the method includes:
- the first anchoring device in the home network corresponding to the user equipment receives the first call request, where the first call request is used to request to establish a long-term evolution-based voice VoLTE call, and allocate the first user plane resource to the VoLTE call. information;
- the first anchoring device sends a second call request to the mobile switching center MSC in the roaming network where the user equipment is currently located, where the second call request carries the first user plane resource information;
- the first anchoring device receives the second call response sent by the MSC, and the second call response carries the second user plane resource information allocated by the MSC for the VoLTE call, the first user plane resource information And the second user plane resource information is used to establish a user plane path for the VoLTE call between the MSC and the first anchoring device, where the user plane path is used to transmit media data of the VoLTE call ;
- the first anchoring device receives a session conversion request sent by the MSC, and the session conversion request is that the MSC is receiving the mobility management network element MME. Transmitted to the first anchor device after the sent SRVCC handover request;
- the MSC in the roaming network is used as the signaling and media plane anchor.
- the MSC does not need to change the media path to the remote end, so that the signaling of the SRVCC handover process can be shortened.
- the media side switches distances, which greatly shortens the interruption delay and improves the user experience.
- the first anchoring device generates a session transition identifier for the SRVCC handover according to the first registration request, where the session transition identifier is a global unique identifier;
- the first anchoring device needs to determine that the user equipment is an S8HR user equipment, and generate a globally uniquely-identified session conversion identifier for the S8HR user equipment, and transmit the session conversion identifier to the MSC, and the MSC converts the identifier according to the session. Contact the first anchoring device.
- the session transition identifier is used to identify the first anchoring device such that the MSC can locate the first anchoring device according to the session transition identifier during an SRVCC handover procedure.
- the MSC in the roaming network may be addressed to the first anchoring device according to the session transition identifier.
- the problem that the MSC in the existing roaming network cannot locate the first anchoring device by using the session identifier generated by the first anchoring device is solved.
- the first anchoring device determines the location according to the first registration request.
- the user equipment is an S8HR roaming user equipment, including:
- the first anchoring device acquires location information that the user equipment is currently located, and subscription information of the user equipment;
- the first anchoring device determines that the user equipment is an S8HR roaming user equipment according to the location information and the subscription information.
- the first anchoring device may determine that the user equipment is an S8HR roaming user equipment according to the location information of the user equipment and the subscription information of the user equipment.
- the first anchoring device comprises a first access switch forwarding control function device ATCF.
- the first anchoring device includes the first ATCF. Therefore, in the process of SRVCC handover, the first ATCF acts as a signaling anchor before and after the handover, and ensures continuity of the session before and after the access transition.
- the present invention provides an SRVCC switching method in an S8HR roaming architecture, where the method includes:
- the mobile switching center MSC in the roaming network where the user equipment is currently located receives a second call request sent by the first anchoring device in the home network corresponding to the user equipment, and the second call request is used to request to establish based on the long-term An evolved voice VoLTE call, and the second call request carries first user plane resource information allocated by the first anchoring device for the VoLTE call;
- the MSC allocates second user plane resource information to the VoLTE call, and sends a second call response to the first anchor device, where the second call response carries the second user plane resource information, where the a user plane resource information and the second user plane resource information are used to establish a user plane path for the VoLTE call between the first anchoring device and the MSC, where the user plane path is used to transmit the Media data for VoLTE calls;
- the MSC receives an SRVCC handover request sent by the mobility management network element MME, and sends a session transition to the first anchor device according to the SRVCC handover request.
- the MSC in the roaming network is used as the signaling and media plane anchor.
- the MSC does not need to change the media path to the remote end, so that the signaling of the SRVCC handover process can be shortened.
- the media side switches distances, which greatly shortens the interruption delay and improves the user experience.
- the mobile switching center MSC in the roaming network where the user equipment is currently located receives the second call request sent by the first anchoring device in the home network corresponding to the user equipment, :
- the MSC sends a fourth registration request to the first anchoring device according to the session conversion identifier, where the fourth registration request carries the address information of the MSC.
- the MSC acts as a signaling and media plane anchor, and the MSC continuously advances the first anchoring device in the IMS registration process of the user equipment, so that the first anchoring device will signal and media in the subsequent VoLTE call process.
- the surface is anchored to the MSC.
- the present invention provides an SRVCC switching device in an S8HR roaming architecture, where the device is applied to a first anchoring device in a home network corresponding to a user equipment, including:
- a first receiver configured to receive a first call request, where the first call request is used to request to establish a long-term evolution-based voice VoLTE call, and allocate first user plane resource information to the VoLTE call;
- a first transmitter configured to send a second call request to a second anchoring device in the roaming network where the user equipment is currently located, where the second call request carries the first user plane resource information;
- the first receiver is further configured to receive a second call response sent by the second anchoring device, where the second call response carries a second user plane allocated by the second anchoring device to the VoLTE call Resource information, the first user plane resource information and the second user plane resource information are used to establish a user plane path for the VoLTE call between the second anchoring device and the first anchoring device, The user plane path is used to transmit media data of the VoLTE call;
- the first receiver is further configured to receive a first access transition update request sent by the second anchoring device when the VoLTE call has a single wireless voice call continuity SRVCC handover;
- the device further includes: a first processor;
- the first receiver is further configured to receive a first registration request sent by the user equipment
- the first processor is configured to determine, according to the first registration request, that the user equipment is an S8HR roaming user equipment;
- the first processor is further configured to acquire identifier information of the second anchoring device, where the second anchoring device is used for SRVCC switching of a roaming user in an S8HR roaming architecture;
- the first transmitter is further configured to send, according to the identifier information of the second anchoring device, a second registration request of the user equipment to the second anchoring device, where the second registration request is used to The user equipment requests to be registered with the second anchoring device;
- the first receiver is further configured to receive a second registration response corresponding to the second registration request sent by the second anchoring device, where the second registration response carries the second anchoring device Session conversion identifier for SRVCC handover;
- the first transmitter is further configured to send a third registration request to the query/service call session control function device I/S-CSCF, where the third registration request carries the session conversion identifier, and the third registration request Used to request registration of the user equipment for the I/S-CSCF.
- the S8HR roaming user equipment is a user equipment that roams into the roaming network and needs to adopt a S8 interface-based home routing HR communication mechanism for VoLTE.
- the first processor is further configured to acquire location information that is currently located by the user equipment, and obtain identifier information of the second anchoring device according to the location information.
- the session transition identifier is used to identify the second anchoring device in the roaming network, so that the mobile switching center MSC in the roaming network can be based on the SRVCC handover procedure
- the session conversion identifier locates the second anchoring device.
- the first processor is further configured to acquire location information of the user equipment, and subscription information of the user equipment, and determine, according to the location information and the subscription information,
- the user equipment is an S8HR roaming user equipment.
- the first anchoring device comprises a first access switch forwarding control function device ATCF.
- the present invention provides an SRVCC switching device in an S8HR roaming architecture, where the device is applied to a second anchoring device in a roaming network where the user equipment is currently located, and includes:
- a second receiver configured to receive a second call request sent by a first anchor device of a home network of the user equipment, where the second call request is used to request to establish a long-term evolution-based voice VoLTE call, and The second call request carries the first user plane resource information allocated by the first anchoring device to the VoLTE call;
- a second transmitter configured to allocate second user plane resource information to the VoLTE call, and send a second call response to the first anchor device, where the second call response carries the second user plane resource information
- the first user plane resource information and the second user plane resource information are used to establish a user plane path for the VoLTE call between the second anchoring device and the first anchoring device,
- the user plane path is used to transmit media data of the VoLTE call;
- the device further includes: a second processor;
- the second receiver is further configured to receive a second registration request sent by the first anchoring device, where the second anchoring device is used for an SRVCC handover of a roaming user in an S8HR roaming architecture;
- the second processor is configured to generate a session transition identifier for SRVCC handover according to the second registration request;
- the second transmitter is further configured to send, to the first anchoring device, a second registration response corresponding to the second registration request, where the second registration response carries the session transition identifier, so that the first An anchoring device sends a third registration request to the query/service call session control function device I/S-CSCF, where the third registration request carries the session conversion identifier, and the third registration request is used for the user
- the device requests to be registered with the I/S-CSCF.
- the session transition identifier is used to identify the second anchoring device in the roaming network, so that the MSC can locate the second according to the session transition identifier during an SRVCC handover procedure Anchoring equipment.
- the second anchoring device comprises a second access switching forwarding control function device ATCF.
- the present invention provides an SRVCC switching device in an S8HR roaming architecture, where the device is applied to a first anchoring device in a home network corresponding to the user equipment, including:
- a third receiver configured to receive a first call request, where the first call request is used to request to establish a long-term evolution-based voice VoLTE call, and allocate first user plane resource information to the VoLTE call;
- a third transmitter configured to send a second call request to the mobile switching center MSC in the roaming network where the user equipment is currently located, where the second call request carries the first user plane resource information;
- the third receiver is further configured to receive a second call response sent by the MSC, where the second call response carries second user plane resource information allocated by the MSC for the VoLTE call, the first user
- the face resource information and the second user plane resource information are used to establish a user plane path for the VoLTE call between the MSC and the first anchoring device, where the user plane path is used to transmit the VoLTE call Media data;
- the third receiver is further configured to receive a session conversion request sent by the MSC when the VoLTE call has a single wireless voice call continuity SRVCC handover, where the session conversion request is that the MSC is receiving mobility management. Sending to the first anchor device after the SRVCC handover request sent by the network element MME;
- the third transmitter is further configured to send, according to the session conversion request, an access transition update request to an application server AS or a serving call session control function S-CSCF, where the access transition update request is used in the MSC Establishing a new session with the AS or the S-CSCF and causing the AS or the S-CSCF to associate the new session with a remote session.
- the device further includes: a third processor;
- the third receiver is further configured to receive a first registration request sent by the user equipment
- the third processor is configured to determine, according to the first registration request, that the user equipment is an S8HR roaming user equipment;
- the third processor is further configured to generate, according to the first registration request, an SRVCC switch a session conversion identifier, where the session conversion identifier is a global unique identifier;
- the third transmitter is further configured to send a second registration request to the query/service call session control function device I/S-CSCF, where the second registration request carries the session conversion identifier, and the second registration request And configured to request the user equipment to register with the I/S-CSCF, so that the I/S-CSCF sends the session transition identifier to the MSC, so that the MSC converts the identifier according to the session. Sending address information of the MSC to the first anchoring device.
- the S8HR roaming user equipment is a user equipment that roams into the roaming network and needs to adopt a S8 interface-based home routing HR communication mechanism for VoLTE.
- the session transition identifier is used to identify the first anchoring device such that the MSC can locate the first anchoring device according to the session transition identifier during an SRVCC handover procedure.
- the third processor is further configured to acquire location information of the user equipment, and subscription information of the user equipment, and determine, according to the location information and the subscription information,
- the user equipment is an S8HR roaming user equipment.
- the first anchoring device comprises a first access switch forwarding control function device ATCF.
- the present invention provides an SRVCC switching apparatus in an S8HR roaming architecture, where the apparatus is applied to a mobile switching center MSC in a roaming network where a user equipment is currently located, and includes:
- a fourth receiver configured to receive a second call request sent by a first anchoring device in the home network corresponding to the user equipment, where the second call request is used to request to establish a long-term evolution-based voice VoLTE call, and The second call request carries first user plane resource information allocated by the first anchoring device to the VoLTE call;
- a fourth transmitter configured to allocate second user plane resource information to the VoLTE call, and send a second call response to the first anchor device, where the second call response carries the second user plane resource information
- the first user plane resource information and the second user plane resource information are used to establish a user plane path for the VoLTE call between the first anchoring device and the MSC, where the user plane path is used. Transmitting media data of the VoLTE call;
- the fourth receiver is further configured to receive an SRVCC handover request sent by the mobility management network element MME when the VoLTE call has a single wireless voice call continuity SRVCC handover;
- the fourth transmitter is further configured to send a session conversion request to the first anchoring device according to the SRVCC switching request, where the session conversion request is used to request the first anchoring device to apply to an application server AS or a service
- the call session control function S-CSCF sends an access transition update request for establishing a new session between the MSC and the AS or the S-CSCF and causing the AS or The S-CSCF associates the new session with a remote session.
- the fourth receiver is further configured to receive a third registration request of the user equipment sent by the MME, where the third registration request carries the first anchor device generated Session conversion identifier;
- the fourth transmitter is further configured to send a fourth registration request to the first anchoring device according to the session transition identifier, where the fourth registration request carries address information of the MSC.
- a user plane path is established for the VoLTE call between the first anchoring device and the second anchoring device, and when the SRVCC handover occurs, the first anchoring device receives the first sent by the second anchoring device. Accessing a conversion update request, and transmitting a second access transition update request to the AS or the S-CSCF according to the first access transition update request, thereby between the second anchoring device and the AS or the second anchoring device and the S - Establish a new session between the CSCFs and associate the AS or S-CSCF with the new session and the remote session.
- the remote leg and the media surface of the second anchoring device and the remote user device do not change, thereby shortening the SRVCC
- the signaling and media plane switching distance of the handover process greatly shortens the interruption delay and improves the user experience.
- FIG. 1 is an application scenario diagram of SRVCC handover in an S8HR roaming architecture according to Embodiment 1 of the present invention
- FIG. 2 is a schematic diagram of a signaling path and a user plane path of a second anchoring device to be serialized into a VoLTE call according to Embodiment 1 of the present invention
- FIG. 3 is a schematic diagram of SRVCC handover in an S8HR roaming architecture according to Embodiment 1 of the present invention
- FIG. 4 is a schematic structural diagram of an apparatus for SRVCC handover in an S8HR roaming architecture according to Embodiment 1 of the present invention
- FIG. 5 is a diagram of SRVCC switching in another S8HR roaming architecture according to Embodiment 1 of the present invention. Schematic diagram of the structure
- FIG. 6 is a flowchart of a method for a user equipment to register with a second ATCF in an S8HR roaming architecture according to Embodiment 1 of the present invention
- FIG. 7 is a flowchart of a method for a user equipment to actively call a peer device in an S8HR roaming architecture according to Embodiment 1 of the present invention
- FIG. 8 is a schematic diagram of signaling and media plane paths in an S8HR roaming architecture according to Embodiment 1 of the present invention.
- FIG. 9 is a flowchart of a method for a user equipment to be called by a peer device in an S8HR roaming architecture according to Embodiment 1 of the present invention.
- FIG. 10 is a flowchart of a method for SRVCC handover in an S8HR roaming architecture according to Embodiment 1 of the present invention
- FIG. 11 is an application scenario diagram of SRVCC handover in an S8HR roaming architecture according to Embodiment 2 of the present invention.
- FIG. 12 is a schematic diagram of a signaling path and a user plane path of an MSC to be serialized into a VoLTE call according to Embodiment 2 of the present invention
- FIG. 13 is a schematic structural diagram of an apparatus for SRVCC handover in an S8HR roaming architecture according to Embodiment 2 of the present invention.
- FIG. 14 is a schematic structural diagram of an apparatus for SRVCC handover in another S8HR roaming architecture according to Embodiment 2 of the present invention.
- FIG. 16 is a flowchart of a method for a user equipment to actively call a peer device in an S8HR roaming architecture according to Embodiment 2 of the present invention
- FIG. 17 is a schematic diagram of signaling and media plane paths in an S8HR roaming architecture according to Embodiment 2 of the present invention.
- FIG. 18 is a flowchart of a method for a user equipment to be called by a peer device in an S8HR roaming architecture according to Embodiment 2 of the present invention
- FIG. 19 is a flowchart of a method for SRVCC handover in an S8HR roaming architecture according to Embodiment 2 of the present invention.
- FIG. 20 is a signaling and media plane path in an S8HR roaming architecture according to Embodiment 2 of the present invention. Schematic diagram.
- An embodiment of the present invention provides an application scenario of an SRVCC handover method in an S8HR roaming architecture.
- a user equipment roams from a home network (HPLMN) to a roaming network (VPLMN), a home network, and a roaming network.
- the inter-roaming protocol negotiation uses the S8HR architecture to provide the user equipment with the VolTE service; and the user equipment may trigger the SRVCC process in the process of using the VoLTE service.
- the anchoring device in order to reduce the handover delay of the SRVCC handover, may be added in the roaming network.
- the anchor in the home network of the user equipment is used.
- the fixed device is referred to as a first anchoring device
- the anchoring device in the roaming network in which the user device is currently located is referred to as a second anchoring device.
- the address information of the second anchoring device may be configured in the first anchoring device, and since the user device may roam into a different roaming network, a plurality of second anchors may be disposed in the first anchoring device Set the address information of the device.
- the first anchoring device includes a first ATCF and a first ATGW
- the second anchoring device includes a second ATCF and a second ATGW
- the first ATCF and the first ATGW can be deployed independently or in combination
- the second ATCF and The second ATGW can be deployed independently or in combination.
- the IMS network device in the home network sends the registration signaling to the second anchoring device in the roaming network where the user equipment is currently located, thereby serializing it into the IMS.
- the second anchor device generates a session transition identifier that is indispensable in the SRVCC handover process, and the session transition identifier is sent to the home network and transmitted to the MME of the user equipment via the HSS to the roaming network, the session transition The identifier will be transmitted by the MME to the MSC in the home network in the SRVCC process, and the MSC initiates a session transfer procedure to the IMS core network device.
- the second anchoring device When the user equipment initiates a VoLTE call flow (including the user equipment as a calling or as a Calling), the second anchoring device will be serialized into the signaling path and user plane path of the VoLTE call.
- the schematic diagram is shown in Figure 2.
- the second anchoring device will become an anchor in the roaming network.
- the home network When the user equipment triggers the SRVCC handover procedure by moving out of the LTE coverage area to enter the 2G (2rd Generation, 3rd Generation, 3rd Generation, 3rd Generation, Mobile Communication Technology) network coverage area, the home network
- the MSC is addressed to the second anchoring device according to the session transition identifier generated by the second anchoring device, thereby triggering the session switching process, and the access leg of the user equipment to the IMS core network is switched from the original PS domain to the new CS domain.
- 2G 2rd Generation, 3rd Generation, 3rd Generation, 3rd Generation, Mobile Communication Technology
- the remote leg of the second anchoring device to the remote user equipment does not change, because the MSC and the second anchoring device are in the roaming network, the distance is relatively close, so the SRVCC switching delay can be reduced, thereby making the session terminal The delay is not too high and the user is clearly perceived, which improves the user experience.
- FIG. 4 is a structural block diagram of an SRVCC switching apparatus in an S8HR roaming architecture according to an embodiment of the present invention.
- the apparatus is applied to a first anchoring device in a home network corresponding to a user equipment, and the S8HR roaming architecture is used.
- the lower SRVCC switching device may vary considerably depending on configuration or performance, and may include one or more first receivers 101 and first transmitters 102.
- a first receiver 101 configured to receive a first call request, where the first call request is used to request to establish a long-term evolution-based voice VoLTE call, and allocate first user plane resource information for the VoLTE call;
- the first transmitter 102 is configured to send a second call request to the second anchoring device in the roaming network where the user equipment is currently located, where the second call request carries the first user plane resource information;
- the first receiver 101 is further configured to receive a second call response sent by the second anchoring device, where the second call response carries the second user plane resource information allocated by the second anchoring device for the VoLTE call, and the first user plane resource information And the second user plane resource information is used to establish a user plane path for the VoLTE call between the second anchoring device and the first anchoring device, where the user plane path is used to transmit the media data of the VoLTE call;
- the first receiver 101 is further configured to receive a first access transition update request sent by the second anchoring device when the VoLTE call has a single wireless voice call continuity SRVCC handover;
- the first transmitter 102 is further configured to send, according to the first access transition update request, a second access transition update request, a first access transition update request, and a second connection to the application server AS or the serving call session control function S-CSCF.
- the incoming conversion update request is for requesting to establish a new session between the second anchoring device and the AS or the second anchoring device and the S-CSCF and to associate the AS or S-CSCF with the new session and the remote session.
- the SRVCC switching device in the S8HR roaming architecture includes a first processor 103 in addition to the first receiver 101 and the first transmitter 102, and the device may further include other components.
- a first memory 104, one or more first storage media 107 storing the first application 105 or the first data 106 (eg, one or one in a Shanghai amount storage device) may also be included.
- the first memory 104 and the first storage medium 107 may be short-term storage or persistent storage.
- the program stored on the first storage medium 107 may include one or more modules (not shown), each of which may include a series of instruction operations in the SRVCC switching device under the S8HR roaming architecture.
- the first processor 102 can be arranged to communicate with the first storage medium 107 to perform a series of instruction operations in the first storage medium 107 on the SRVCC switched device under the S8HR roaming architecture.
- the SRVCC switching device in the S8HR roaming architecture may further include one or more first power sources 108, one or more first wired or wireless network interfaces 109, one or more first input and output interfaces 110, and one Or more than one first keyboard 111, and/or one or more first operating systems 112, such as Windows ServerTM, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM, and the like.
- the apparatus for SRVCC handover under the S8HR roaming architecture in the present invention includes a first receiver 101, a first transmitter 102, and a first processor 103, which may also have the following functions:
- the first receiver 101 is further configured to receive a first registration request sent by the user equipment;
- the first processor 103 is configured to determine, according to the first registration request, that the user equipment is an S8HR roaming user equipment;
- the first processor 103 is further configured to acquire identification information of the second anchoring device, and the second anchoring device is used for SRVCC switching of the roaming user in the S8HR roaming architecture;
- the first transmitter 102 is further configured to send, according to the identification information of the second anchoring device, a second registration request of the user equipment to the second anchoring device, where the second registration request is used to request the user equipment to register in the second anchoring device;
- the first receiver 101 is further configured to receive a second registration response corresponding to the second registration request sent by the second anchoring device, where the second registration response carries a session conversion identifier generated by the second anchoring device for SRVCC handover;
- the first transmitter 102 is further configured to send a third registration request to the query/service call session control function device I/S-CSCF, where the third registration request carries a session conversion identifier, and the third registration request is used to request registration for the user equipment.
- I/S-CSCF query/service call session control function device
- the S8HR roaming user equipment is a user equipment that roams into the roaming network, and needs to adopt a home routing HR communication mechanism based on the S8 interface to perform VoLTE.
- the first processor is further configured to acquire location information of the current location of the user equipment, and obtain identifier information of the second anchoring device according to the location information.
- the session transition identifier is used to identify the second anchor device in the roaming network, so that the mobile switching center MSC in the roaming network can locate the second anchor device according to the session transition identifier during the SRVCC handover process.
- the first processor 103 is further configured to obtain location information of the user equipment, and subscription information of the user equipment, and determine, according to the location information and the subscription information, that the user equipment is an S8HR roaming user equipment.
- the first anchoring device comprises a first access switch forwarding control function device ATCF.
- a user plane path is established for the VoLTE call between the first anchoring device and the second anchoring device, and when the SRVCC handover occurs, the first anchoring device receives the first sent by the second anchoring device. Accessing a conversion update request, and transmitting a second access transition update request to the AS or the S-CSCF according to the first access transition update request, thereby between the second anchoring device and the AS or the second anchoring device and the S - Establish a new session between the CSCFs and associate the AS or S-CSCF with the new session and the remote session.
- the remote leg and the media surface of the second anchoring device and the remote user device do not change, thereby shortening the SRVCC
- the signaling and media plane switching distance of the handover process greatly shortens the interruption delay and improves the user experience.
- FIG. 5 is a structural block diagram of an SRVCC switching apparatus in an S8HR roaming architecture according to an embodiment of the present invention.
- the apparatus is applied to a second anchoring device in a roaming network corresponding to a user equipment, and the S8HR roaming architecture is used.
- the lower SRVCC switching device may vary considerably depending on configuration or performance, and may include one or more second receivers 201 and second transmitters 202.
- the second receiver 201 is configured to receive a second call request sent by the first anchor device of the home network of the user equipment, where the second call request is used to request to establish a long-term evolution-based voice VoLTE call, and the second call request carries The first anchoring device allocates first user plane resource information for the VoLTE call;
- a second transmitter 202 configured to allocate second user plane resource information for the VoLTE call, and send a second call response to the first anchor device, where the second call response carries the second user plane resource information, the first
- the user plane information and the second user plane resource information are used to establish a user plane path for the VoLTE call between the second anchoring device and the first anchoring device, where the user plane path is used to transmit the media data of the VoLTE call;
- the second transmitter 202 is further configured to: after receiving the SRVCC access conversion message of the VoLTE call sent by the mobile switching center MSC where the user equipment roams, when the VoLTE call has a single wireless voice call continuity SRVCC handover,
- the device sends a first access transition update request, where the first access transition update request is used to request the first anchor device to send a second access transition update request to the application server AS or the serving call session control function S-CSCF, where the first access
- the incoming conversion update request and the second access translation update request are used to request to establish a new session between the second anchoring device and the AS or the second anchoring device and the S-CSCF and associate the AS or S-CSCF with a new one Session and remote session.
- the SRVCC switching device in the S8HR roaming architecture includes, in addition to the foregoing second receiver 201 and the second transmitter 202, a second processor 203; the device may further include other components.
- a second memory 204, one or more second storage media 207 storing the second application 205 or the second data 206 (eg, one or one of the Shanghai quantity storage devices) may also be included.
- the second memory 204 and the second storage medium 207 may be short-term storage or persistent storage.
- the program stored on the second storage medium 207 may include one or more modules (not shown), each of which may include a series of instruction operations in the SRVCC switching device under the S8HR roaming architecture.
- the second processor 202 can be configured to communicate with the second storage medium 207 to perform a series of instruction operations in the second storage medium 207 on the SRVCC switched device under the S8HR roaming architecture.
- the apparatus for SRVCC switching in the S8HR roaming architecture may further include one or more second power sources 208, one or more second wired or wireless network interfaces 209, one or more second input/output interfaces 210, one Or more than one second keyboard 211, and/or one or more second operating systems 212, such as Windows ServerTM, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM, and the like.
- the second receiver 201, the second transmitter 202, and the second processor 203 included in the apparatus for SRVCC handover in the S8HR roaming architecture in the present invention may also have the following functions:
- the second receiver 201 is further configured to receive a second registration request sent by the first anchoring device, where the second anchoring device is used for the SRVCC switching of the roaming user in the S8HR roaming architecture;
- the second processor 203 is configured to generate a session transition identifier for the SRVCC handover according to the second registration request.
- the second transmitter 202 is further configured to send, to the first anchoring device, a second registration corresponding to the second registration request.
- the second registration response carries the session transition identifier, so that the first anchoring device sends a third registration request to the query/service call session control function device I/S-CSCF, where the third registration request carries the session transition identifier, and the third The registration request is used to request registration of the user equipment for the I/S-CSCF.
- the session transition identifier is used to identify the second anchor device in the roaming network, so that the MSC can locate the second anchor device according to the session transition identifier during the SRVCC handover process.
- the second anchoring device comprises a second access switch forwarding control function device ATCF.
- the second anchoring device is added in the roaming network as an anchor point of the signaling and media plane before and after the SRVCC handover, so that when the SRVCC handover occurs, the MSC sends the SRVCC access transition to the second anchoring device.
- the message since the MSC and the second anchoring device are both in the roaming network, the distance between the MSC and the second anchoring device is relatively close, so that the path that the MSC sends the session switching request to the second anchoring device is short. , greatly shortening the interruption delay and improving the user experience.
- An embodiment of the present invention provides an SRVCC handover method in an S8HR roaming architecture.
- an ATCF and an ATWG are deployed in a roaming network as a signaling and media plane anchor, that is, a second anchoring device.
- the ATCF and the ATGW included in the first anchoring device are respectively referred to as the first ATCF and the first ATGW, respectively.
- the ATCF and the ATGW included in the second anchoring device are referred to as a second ATCF and a second ATGW, respectively.
- the first ATCF and the first ATGW may be deployed independently or in combination.
- the second ATCF and the second ATGW may be deployed independently or in combination.
- the first ATCF and the first ATGW are deployed independently, and the second ATCF and the second ATGW are independently deployed as an example for description.
- an embodiment of the present invention provides an SRVCC handover method in an S8HR roaming architecture, where the user equipment is registered in a second ATCF in an S8HR roaming architecture, and the method is applied to the first ATCF and the second ATCF. Between, the method includes:
- Step 301 The first ATCF receives the first registration request sent by the user equipment, and determines, according to the first registration request, that the user equipment is an S8HR roaming user equipment.
- the S8HR roaming user equipment is a user equipment that roams into the roaming network and needs to use the home routing HR communication mechanism based on the S8 interface to perform VoLTE.
- the user equipment When the user equipment roams from the home network to the roaming network and EPS (Evolved Packet After the system, the evolved packet system is attached, if the user equipment wants to use the VoLTE service, the user equipment must first complete the registration process of the IMS (IP Multimedia Subsystem) core network in the home network to the home network. The user equipment sends a first registration request to the first ATCF in the home network, and the first registration request is used to request registration with the first ATCF.
- IMS IP Multimedia Subsystem
- the user equipment sends the first bearer of the PDN (Packet Data Network) connection of the corresponding IMS APN (access point name) in the roaming EPS network to the first ATCF in the home network.
- the registration request, the EPS network is an access network of the user equipment to the IMS core network.
- the first ATCF receives the first registration request sent by the user equipment, and determines whether the user equipment is an S8HR roaming user equipment by using the following steps (1) and (2). If the user equipment is an S8HR roaming user equipment, step 302 is performed.
- the first ATCF acquires the location information of the user equipment and the subscription information of the user equipment;
- the HSS Home Subscriber Server
- P-CSCF Proxy-call Session Control Function
- the call session control function can be used to know the location information of the user equipment; and the HSS and/or the P-CSCF are bound to the correspondence between the identification information of the user equipment and the location information.
- This step can be implemented by the following steps (1-1) and (1-2), including:
- the first ATCF obtains the location information of the user equipment from the HSS or the P-CSCF.
- the first ATCF obtains the location information of the current location of the user equipment from the correspondence between the identifier information and the location information in the HSS according to the identifier information of the user equipment; or
- the first ATCF obtains the location information of the user equipment from the correspondence between the identifier information and the location information in the P-CSCF according to the identifier information of the user equipment.
- the identification information may be a telephone number of the user equipment or an IMSI (International Mobile Subscriber Identity) or the like.
- the location information may include geographic location information (such as longitude and latitude, etc.) or network location information (such as service network identity, cell identity, tracking area identity (TAI), etc.).
- the first registration request carries at least the identification information of the user equipment, and may also carry the location information of the current user equipment; when the first registration request carries the current location information of the user equipment
- the first ATCF obtains the location information directly from the first registration request.
- the first ATCF acquires subscription information of the user equipment.
- the HSS in the home network stores the correspondence between the identification information of the user equipment and the subscription information.
- the first ATCF obtains the correspondence between the identification information and the subscription information in the HSS according to the identification information of the user equipment.
- the first ATCF determines, according to the location information and the subscription information, whether the user equipment is an S8HR roaming user equipment.
- the first ATCF learns the current roaming network (VPLMN (Visted Public Land Mobile Network)) of the user equipment according to the location information, and then determines whether the user equipment is S8HR by the following steps (A) to (C) Roaming user equipment:
- VPN Vehicle Public Land Mobile Network
- the first ATCF determines that the user equipment is an S8HR roaming user equipment by using indication information included in the subscription information for indicating that the user equipment is an S8HR roaming user equipment in the VPLMN.
- the subscription data of the user equipment may include a specific indication information indicating whether the user equipment is an S8HR roaming user equipment in the VPLMN, and the first ATCF may determine the user according to the indication information. Whether the device is an S8HR roaming user device.
- the first ATCF may determine, by using the subscription information of the user equipment, that the VPLMN does not include the visited address permission indication information, and determine that the user equipment is an S8HR roaming user equipment in the VPLMN.
- the user equipment generally uses the Local Breakout (LBO) to access the PDN through the local visited network.
- LBO Local Breakout
- the first ATCF may determine that the user equipment is an S8HR roaming user by determining that the subscription information does not include the VAA indication information.
- the first ATCF determines that the user equipment is an S8HR roaming user equipment by using an S8HR roaming agreement between the VPLMN and the Home Public Land Mobile Network (HPLMN).
- HPLMN Home Public Land Mobile Network
- the first ATCF may determine whether the related roaming protocol between the HPLMN and the VPLMN of the user equipment is required to provide the VoLTE to the user equipment by using the S8HR communication mechanism.
- the service if the S8HR communication mechanism is required to provide the VoLTE service to the user equipment, determines that the user equipment is an S8HR roaming user.
- Step 302 The first ATCF obtains the location information of the user equipment, and obtains the identifier information of the second ATCF in the roaming network where the user equipment is currently located according to the location information.
- the identification information of the second ATCF may be a device identifier of the second ATCF or address information of the second ATCF, and the like.
- the first ATCF may obtain the identification information of the second ATCF in the roaming network by requesting to anchor the media plane and the signaling plane of the user equipment to The anchoring device (second ATCF) in the roaming network.
- the first ATCF stores the correspondence between the location range of each network in the global network and the network identifier, and the correspondence between the network identifier and the identification information of the anchor device; correspondingly, this step may be:
- the first ATCF acquires the location information of the user equipment, and obtains the network identifier of the roaming network where the user equipment is currently located according to the location information and the corresponding relationship between the location range of each network and the network identifier, according to the network of the roaming network. And the network identifier, the identifier information of the second ATCF in the roaming network where the user equipment is currently located is obtained from the correspondence between the network identifier and the identifier information of the anchor device.
- the network identifier can be a network number or a network address information.
- the second ATCF is used for SRVCC handover of the roaming user under the S8HR roaming architecture.
- the first ATCF is bound to the correspondence between the identifier information of the user equipment and the identifier information of the second ATCF, so that the identifier information of the user equipment and the anchoring device may be directly determined according to the identifier information of the user equipment.
- step of the first ATCF acquiring the location information of the user equipment is the same as the step (1) in step 301, and details are not described herein again.
- Step 303 The first ATCF sends a second registration request of the user equipment to the second ATCF according to the identifier information of the second ATCF, where the second registration request is used to request the user equipment to register with the second ATCF.
- the second registration request carries the identification information of the user equipment; the second registration request is used to request the user equipment to register with the second ATCF, so as to implement the registration signaling path of the second ATCF/ATGW into the user equipment.
- Step 304 The second ATCF receives the second registration request sent by the first ATCF, and according to the second note The request request generates a session transition identifier of the current session of the user equipment, and sends a second registration response to the first ATCF, where the second registration response carries the session transition identifier.
- the session transition identifier is used to identify the second ATCF in the roaming network.
- the session identifier may be an STN-SR (Session Transfer Number for SRVCC), and the STN-SR is used by the MSC to address the second ATCF according to the session identifier in the SRVCC process.
- STN-SR Session Transfer Number for SRVCC
- the second registration response may carry the user identifier of the user in addition to the session conversion identifier.
- Step 305 The first ATCF receives the second ATCF to send a second registration response, and sends a third registration request to an I/S-CSCF (Interrogating/serving-call session control function) in the home network.
- the third registration request carries the session conversion identifier.
- the third registration request is used to request the user equipment to register with the I/S-CSCF, and subsequently, through the following steps 306-309, the session conversion identifier is transmitted to the HSS in the home network, and the session conversion identifier signed in the original HSS is replaced. Then, along with other subscription data, it is inserted into the MME (mobility management entity) in the roaming network.
- the MME mobility management entity
- the MME forwards the session transition identifier to the MSC, and the MSC triggers the SRVCC access transition request to the second ATCF according to the session transition identifier.
- Step 306 The I/S CSCF receives the third registration request sent by the first ATCF, and sends a fourth registration request to the SCC AS in the home network, where the fourth registration request carries the session conversion identifier.
- the fourth registration request may carry the identification information of the user equipment in addition to the session conversion identifier.
- the I/S CSCF When receiving the third registration request sent by the first ATCF, the I/S CSCF sends a third registration response corresponding to the third registration request to the first ATCF, where the third registration response is used to indicate that the I/S CSCF has successfully received the first ATCF.
- the third registration request sent.
- Step 307 The SCC AS receives the fourth registration request sent by the I/S CSCF, and sends a data update request to the HSS in the home network, where the data update request carries the session conversion identifier.
- the SCC AS receives the fourth registration request sent by the I/S CSCF, obtains the session conversion identifier from the fourth registration request, sends a sh-pull to the HSS, and the HSS receives the sh-pull sent by the SCC AS, and sends the sh-pull to the SCC.
- the AS sends a sh-pull-resp, the sh-pull-resp carries the user equipment SRVCC capability;
- the SCC AS receives the sh-pull-resp sent by the HSS, and sends a data update request to the HSS, where the data update request carries the session conversion identifier.
- the data update request may also carry an identification letter of the user equipment. interest.
- the SCC AS sends a fourth registration response corresponding to the fourth registration request to the I/S CSCF, where the fourth registration response is used to indicate that the SCC AS has successfully received the fourth registration request sent by the I/S CSCF.
- Step 308 The HSS receives the data update request sent by the SCC AS, and sends an insert subscription data request to the MME in the roaming network, where the insertion subscription data request carries the session conversion identifier.
- the HSS When receiving the data update request sent by the SCC AS, the HSS sends a data update response corresponding to the data update request to the SCC AS, where the data update response is used to indicate that the HSS has successfully received the data update request sent by the SCC AS.
- the HSS receives the data update request sent by the SCC AS, and obtains the session conversion identifier and the identifier information of the user equipment from the data update request, and obtains the subscription information of the user equipment according to the identifier information of the user equipment, where the user equipment is obtained.
- the session conversion identifier in the subscription information is modified to the session conversion identifier.
- the insertion subscription data request may further carry the identification information of the user equipment and the subscription information of the user equipment.
- Step 309 The MME receives the insertion subscription data request sent by the HSS, and stores the session exchange identifier.
- the MME When receiving the request for inserting the subscription data sent by the HSS, the MME sends an insertion subscription data response corresponding to the insertion subscription data request to the HSS, and the insertion subscription data response is used to indicate that the MME has successfully received the subscription data sent by the HSS.
- the MME obtains the identification information of the user equipment from the insertion subscription data request, the session conversion identifier and the subscription information of the user equipment, and the identifier information of the user equipment, the session conversion identifier, and the subscription information of the user equipment.
- step 301-step 309 is a registration process of the user equipment.
- step 301-step 309 is performed only once; when the user needs to perform the call procedure, step 401 is performed. -404 or 501-504.
- the first anchoring device determines that the user equipment is the S8HR roaming user equipment and determines the current location of the user equipment, and selects the second network in the roaming network where the user equipment is currently located according to the current location of the user equipment.
- the device is anchored and the second anchoring device is serialized into the registration path, so that when the SRVCC switching occurs, the interruption delay can be shortened and the user experience can be improved.
- an embodiment of the present invention provides an SRVCC handover method in an S8HR roaming architecture, where the method is a method for a user equipment to actively call a peer device in an S8HR roaming architecture, and the method is applied to a first ATCF and a second ATCF. Between, the method includes:
- Step 401 The first ATCF receives the first call request sent by the user equipment, and allocates first user plane resource information for the VoLTE call, and sends a second call request to the second ATCF, where the second call request carries the first user.
- Surface resource information The first ATCF receives the first call request sent by the user equipment, and allocates first user plane resource information for the VoLTE call, and sends a second call request to the second ATCF, where the second call request carries the first user.
- the user equipment When the user equipment initiates a VoLTE call procedure in the roaming network, the user equipment sends a first call request to the first ATCF, where the first call request is used to request to establish a VoLTE call, where the first call request carries the identifier of the user equipment. Information and identification information of the called peer device.
- the first ATCF receives the first call request sent by the user equipment, and obtains the identifier information of the user equipment and the identifier information of the peer device from the first call request, and allocates the first user plane resource information to the user equipment.
- the first user plane resource information may be the address information of the first ATGW in the home network, obtain the identifier information of the second ATCF, and send a second call request to the second ATCF according to the identifier information of the second ATCF, the second The call request is used to request to establish a VoLTE call, and the second call request may carry the identification information of the user equipment and the identification information of the peer device, in addition to the first user plane resource information.
- the step of the first ATCF acquiring the identification information of the second ATCF may be:
- the first ATCF obtains the location information of the user equipment, and obtains the identifier information of the second ATCF in the roaming network where the user equipment is currently located according to the location information. or,
- the first ATCF stores the correspondence between the identifier information of the user equipment and the identifier information of the anchor device, and the first ATCF obtains the identifier information of the user equipment and the identifier of the anchor device according to the identifier information of the user equipment. Corresponding relationship of the information acquires identification information of the second ATCF corresponding to the user equipment.
- Step 402 The second ATCF receives the second call request sent by the first ATCF, and allocates second user plane resource information for the VoLTE call, and sends a second call response to the first ATCF, where the second call response carries the second user plane. Resource information.
- the second ATCF receives the second call request sent by the first ATCF, and obtains the first user plane resource information, the identifier information of the user equipment, and the identifier information of the peer device from the second call request, and allocates the first information to the VoLTE.
- the second user plane resource information, the second user plane resource information may be address information of the second ATGW in the roaming network, and send a second call response to the first ATCF, where the second call response
- the second user plane resource information, the identifier information of the user equipment, and the identifier information of the peer device are carried.
- the first user plane resource information and the second user plane resource information are used to establish a user plane path for the VoLTE call between the first ATCF and the second ATCF.
- the second ATCF establishes a user plane path for the VoLTE call according to the first user plane resource information and the second user plane resource information, where the user plane path is used to transmit the media data of the VoLTE call.
- the first user plane resource information may be the address information of the first ATGW, and the second user plane resource may be the second ATGW address information, and the second ATCF is configured according to the first user plane resource information and the second user plane resource information.
- the step of establishing a user plane path for the VoLTE call may be:
- the second ATCF sends a first setup request to the second ATGW according to the address of the second ATGW, where the first setup request carries the address of the first ATGW, the identifier information of the user equipment, and the identifier information of the peer device, to request the first
- the second ATGW establishes a user plane path for the VoLTE call.
- the second ATGW receives the first setup request sent by the second ATCF, and establishes a user plane path with the first ATGW according to the address of the first ATGW, where the user plane path is used by the user equipment to talk with the peer device.
- Step 403 The first ATCF receives the second call response sent by the second ATCF, and establishes a user plane path for the VoLTE call according to the first user plane resource information and the second user plane resource information.
- the step of the first ATCF establishing a user plane path for the VoLTE call according to the first user plane resource information and the second user plane resource information may be:
- the first ATCF sends a second setup request to the first ATGW according to the address of the first ATGW, where the second setup request carries the address of the second ATGW, the identifier information of the user equipment, and the identifier information of the peer device to request
- the first ATGW establishes a user plane path for the VoLTE call.
- the first ATGW receives the second setup request sent by the first ATCF, and establishes a user plane path with the second ATGW according to the address of the second ATGW, where the user plane path is used by the user equipment to talk with the peer device.
- Step 404 The first ATCF sends the first user plane resource information to the peer device according to the identifier information of the peer device.
- the first ATCF sends the address of the first ATGW to the peer device according to the identifier information of the peer device, and the peer device receives the address of the first ATGW sent by the first ATCF, and the first The address of the ATGW is used as the host address of the calling user equipment.
- the first ATCF sends a third call request to the I/S CSCF in the home network, where the third call request carries the first user plane resource information.
- the third call request may further carry the identifier information of the user equipment and the identifier information of the peer device.
- the I/S CSCF receives the third call request sent by the first ATCF, and sends a fourth call request to the SCC AS in the home network, where the fourth call request carries the first user plane resource information.
- the fourth call request may further carry the identifier information of the user equipment and the identifier information of the peer device.
- the SCC AS receives the fourth call request sent by the I/S CSCF, and sends a fourth call response corresponding to the fourth call request to the I/S CSCF.
- the I/S CSCF receives the fourth call response sent by the SCC AS, and sends a fifth call request to the peer device according to the identifier information of the peer device, where the fifth call request carries the first user plane resource information.
- the VoLTE call flow can also be optimized, and the optimized signaling and media plane path is as shown in FIG. 8; then, in step 404, the first ATCF is further
- the second user plane resource information may be sent to the peer device, but the second user plane resource information may be sent to the peer device.
- the specific process may be:
- the first ATCF sends the address of the second ATGW to the peer device according to the identifier information of the peer device, and the peer device receives the address of the second ATGW sent by the first ATCF, and the address of the second ATGW As the host address of the calling user equipment.
- the user equipment uses the address of the second ATGW as the host address of the peer device, the user plane path is shortened, and the data transmission delay is reduced.
- the first anchoring device in the VoLTE call flow connects the second anchoring device into the call signaling plane and the media plane path, so that when the SRVCC handover occurs, only the user equipment is switched to the second anchoring device.
- an embodiment of the present invention provides an SRVCC handover method in an S8HR roaming architecture, where the method is a method for a user equipment to be called by a peer device in an S8HR roaming architecture, and the method is applied to a first ATCF and a second ATCF. Between, the method includes:
- Step 501 The first ATCF of the home network where the user equipment is located receives the first call request sent by the peer device, allocates first user plane resource information for the VoLTE call, and sends a second call request to the second ATCF.
- the second call request carries the first user plane resource information.
- the first ATCF receives the first call request from the peer device, and the first call request is used to request to establish a VoLTE call, where the first call request carries the identifier information of the peer device and Identification information of the called user equipment.
- the first ATCF receives the first call request sent by the peer device, and obtains the identifier information of the user equipment and the identifier information of the peer device from the first call request, and allocates the first user plane resource for the VoLTE call.
- the first user plane resource information may be the address information of the first ATGW in the home network, the first ATCF acquires the identifier information of the second ATCF, and sends the second call request to the second ATCF according to the identifier information of the second ATCF.
- the second call request may carry the identifier information of the user equipment and the identifier information of the peer device, in addition to the first user plane resource information.
- Step 502 The second ATCF receives the second call request sent by the first ATCF, and allocates second user plane resource information for the VoLTE call, and sends a second call response to the first ATCF, where the second call response carries the second user plane. Resource information.
- the second ATCF receives the second call request sent by the first ATCF, and obtains the first user plane resource information, the identifier information of the user equipment, and the identifier information of the peer device from the second call request, and allocates the VoLTE call.
- the second user plane resource information, the second user plane resource information may be the address information of the second ATGW in the roaming network, and send a second call response to the first ATCF, where the second call response carries the second user plane resource information, The identification information of the user equipment and the identification information of the peer device.
- the first user plane resource information and the second user plane resource information are used to establish a user plane path for the VoLTE call between the first ATCF and the second ATCF, and correspondingly, the second ATCF is based on the first user plane
- the source information and the second user plane resource information establish a user plane path for the VoLTE call, and the user plane path is used to transmit media data of the VoLTE call.
- the first user plane resource information may be the address of the first ATGW
- the second user plane resource information may be the address of the second ATGW
- the second ATCF is configured according to the first user plane resource information and the second user plane resource information.
- the second ATCF sends a first setup request to the second ATGW according to the address of the second ATGW, where the first setup request carries the address of the first ATGW, the identifier information of the user equipment, and the identifier information of the peer device, to request the first
- the second ATGW establishes a user plane path for the VoLTE call.
- the second ATGW receives the first setup request sent by the second ATCF, and establishes a user plane path with the first ATGW according to the address of the first ATGW, where the user plane path is used by the user equipment to talk with the peer device.
- Step 503 The first ATCF receives the second call response sent by the second ATCF, and establishes a user plane path for the VoLTE call according to the first user plane resource information and the second user plane resource information.
- the first ATCF receives the second call response sent by the second ATCF, and obtains the second user plane resource information, the identifier information of the user equipment, and the identifier information of the peer device from the second call response, and according to the first user.
- the face resource information and the second user plane resource information establish a user plane path for the VoLTE call.
- the first ATCF sends a second setup request to the first ATGW according to the address of the first ATGW, where the second setup request carries the address of the second ATGW, the identifier information of the user equipment, and the identifier information of the peer device to request
- the first ATGW establishes a user plane path for the VoLTE call.
- the first ATGW receives the second setup request sent by the first ATCF, and establishes a user plane path with the second ATGW according to the address of the second ATGW, where the user plane path is used by the user equipment to talk with the peer device.
- Step 504 The first ATCF sends a third call request to the user equipment according to the identifier information of the user equipment, where the third call request carries the first user plane resource.
- the first ATCF sends an address of the first ATGW to the user equipment according to the identifier information of the user equipment, where the user equipment receives the address of the first ATGW sent by the first ATCF, and uses the address of the first ATGW as a call. Host address of the peer device.
- step 504 the data transmission delay is reduced in order to shorten the user plane path, and the VoLTE call flow may also be optimized, and the first ATCF may not send the first to the user equipment.
- a user plane resource, but the second user plane resource is sent to the user equipment, and the specific process may be:
- the first ATCF sends the address of the second ATGW to the user equipment according to the identifier information of the user equipment, the user equipment receives the address of the second ATGW sent by the first ATCF, and uses the address of the second ATGW as a call. Host address of the peer device.
- the user equipment uses the address of the second ATGW as the host address of the peer device, the user plane path is shortened, and the data transmission delay is reduced.
- the first anchoring device in the VoLTE call flow connects the second anchoring device into the call signaling plane and the media plane path, so that when the SRVCC handover occurs, only the user equipment is switched to the second anchoring device.
- the access leg and the media plane, the second anchoring device and the remote user's remote leg and media plane do not change, which can shorten the signaling and media plane switching distance of the SRVCC switching process, thereby greatly shortening the interruption delay To improve the user experience.
- an embodiment of the present invention provides an SRVCC handover method in an S8HR roaming architecture, where the method is a method for SRVCC handover of a user equipment, where the method is applied to an MSC, a first ATCF, and a second in a roaming network. Between ATCF, the method includes:
- Step 601 The MSC receives the SRVCC handover request sent by the MME, where the SRVCC handover request carries the session transition identifier generated by the second ATCF, and sends a session transition request to the second ATCF according to the session transition identifier.
- the MME sends an SRVCC handover request to the MSC, where the SRVCC handover request carries the second ATCF in the user equipment.
- the session conversion identifier generated during the IMS registration process.
- the MSC receives the SRVCC handover request sent by the MME, and obtains the session transition identifier generated by the second ATCF from the SRVCC handover request, addresses the second ATCF according to the session transition identifier, and sends a session transition request to the second ATCF, where the session transition is performed.
- the request carries the session conversion identifier and the session identifier of the current session of the user equipment and the address information of the corresponding media plane MGW.
- the session identifier is used to identify the user device and associate with the current session of the user device.
- the MSC and the second ATCF are in the same network and the distance between the MSC and the second ATCF is relatively short, the path that the MSC sends the session transition request to the second ATCF is short, and the SRVCC handover delay is shortened.
- Step 602 The second ATCF receives the session conversion request sent by the MSC, and updates the current session to the local user equipment media plane path from the PS access leg to the CS according to the session transition identifier and the session identifier and the address information of the MGW.
- the access leg, the media plane path of the current session to the peer user equipment remains unchanged.
- the second ATCF updates the media plane path of the current session to the local user equipment from the PS access leg to the CS access leg according to the session transition identifier and the session identifier and the address information of the MGW, by using the following step (1) to (3) Implementation, including:
- the second ATCF determines, according to the session transition identifier, that the user equipment is to perform an SRVCC handover method
- the second ATCF determines the current session of the user equipment according to the session identifier.
- the second ATCF updates the media plane path information of the current session to the local user equipment from the PS access leg to the CS access leg.
- the specific process can be:
- the second ATCF sends a configuration request to the second ATGW, where the configuration request carries the session identifier and the address information of the MGW; the second ATGW receives the configuration request sent by the second ATCF, determines the current session of the user equipment according to the session identifier, and according to the session identifier, The MGW address information updates the media plane path information of the second ATGW of the current session to the local user equipment from the PS access back to the CS access back.
- the second ATGW sends a configuration response to the second ATCF, where the configuration response is used to indicate that the second ATGW has successfully switched the current media plane of the user equipment.
- Step 603 The second ATCF sends a first access transition update request to the first ATCF.
- Step 604 The first ATCF receives the first access transition update request sent by the second ATCF, and sends a second access transition update request to the AS or the S-CSCF according to the first access transition update request.
- a first access transition update request and a second access transition update request for establishing a new session between the second ATCF and the AS or between the second ATCF and the S-CSCF and causing the AS or S-CSCF to associate the new one Session and remote session.
- Step 605 The AS or the S-CSCF receives the second access transition update request sent by the first ATCF. Establish a new session and associate the new session with the remote session.
- the AS or the S-CSCF sends a second access transition update response to the first ATCF, where the second access update response is used to indicate that the AS or the S-CSCF has successfully switched the current session of the user equipment.
- the first ATCF sends a first access transition update response to the second ATCF, where the first access transition update response is used to indicate that the AS or the S-CSCF has successfully switched the current session of the user equipment.
- the signaling plane and the media plane of the VoLTE session are anchored to the second anchoring device in the roaming network, so that the second anchoring device is close to the MSC in the roaming network, and the SRVCC switching is implemented.
- the local user and the second anchoring device in the roaming network quickly complete the session switching and the media plane renegotiation process, and the peer user equipment and the first anchoring device do not participate in the media plane renegotiation process, thereby Shorten the media plane interruption delay during the switching process.
- An embodiment of the present invention provides an application scenario of an SRVCC switching method in an S8HR roaming architecture.
- a second anchoring device is not added to the roaming network (such as the second ATCF/
- the second ATGW is used as an anchor point for the signaling and media planes before and after the SRVCC handover, but directly anchors the signaling and media planes to the MSC in the roaming network, and the MSC is responsible for controlling the MSC of the SRVCC handover by the user equipment.
- the address information of the MSC may not be configured in advance in the first anchoring device (the first ATCF/first ATGW) in the home network.
- the first anchoring device when the user equipment initiates the IMS registration process in the roaming network, the first anchoring device generates a session transition identifier, where the session transition identifier is a session unique identifier of the global unique identifier, even in the roaming situation.
- the MSC in the roaming network can also be used to address the first anchoring device.
- the subscription data After the MME in the roaming network obtains the subscription data of the user equipment from the HSS, the subscription data includes the session conversion identifier, selects an MSC that can perform the SRVCC function with the Sv interface, and converts the session identifier. Forwarding to the MSC, the MSC is addressed to the first anchoring device according to the session transition identifier, and the first anchoring device is consecutively advanced, so that the first anchoring device before the user equipment initiates the VoLTE call procedure (for example, during the IMS registration process)
- the address information of the SRVCC MSC can be known in advance, so that the signaling and user plane information can be sent to the MSC when the subsequent user equipment initiates the VoLTE call, thereby realizing the local anchoring function.
- the MSC in the roaming network will be routed into the signaling path and the user plane path of the call, as shown in Figure 12, so that the MSC will become an anchor point in the roaming network.
- the MSC When the user equipment triggers the SRVCC handover procedure by moving out of the LTE coverage area and entering the 2G/3G network coverage area, the MSC only needs to trigger the target network to prepare the CS radio side resource, and complete the user equipment to the MSC access leg to switch from the PS domain to the CS domain. Domain, there is no need to change the MSC to the distal leg of the distal end, see Figure 11.
- the change of the far-end leg in the case of international roaming is avoided, thereby greatly reducing the SRVCC handover delay, so that the session interruption delay is not too high and the user is obviously perceived, thereby improving the user experience.
- FIG. 13 is a structural block diagram of an SRVCC switching apparatus in an S8HR roaming architecture according to an embodiment of the present invention.
- the apparatus is applied to a first anchoring device in a roaming network corresponding to a user equipment, and the S8HR roaming architecture is used.
- the lower SRVCC switching device may vary considerably depending on configuration or performance, and may include one or more third receiver 901 and third transmitter 902.
- a third receiver 901 configured to receive a first call request, where the first call request is used to request to establish a long-term evolution-based voice VoLTE call, and allocate first user plane resource information for the VoLTE call;
- a third transmitter 902 configured to send a second call request to the mobile switching center MSC in the roaming network where the user equipment is currently located, where the second call request carries the first user plane resource information;
- the third receiver 901 is further configured to receive a second call response sent by the MSC, where the second call response carries the second user plane resource information allocated by the MSC for the VoLTE call, and the first user plane resource information and the second user plane resource information are used. Establishing a user plane path for the VoLTE call between the MSC and the first anchoring device, where the user plane path is used to transmit media data of the VoLTE call;
- the third receiver 901 is further configured to: when the VoLTE call has a single wireless voice call continuity SRVCC handover, receive a session conversion request sent by the MSC, where the session conversion request is after the MSC sends the SRVCC handover request sent by the mobility management network element MME. Sent to the first anchoring device;
- the third transmitter 902 is further configured to send an access conversion update request to the application server AS or the serving call session control function S-CSCF according to the session conversion request, where the access conversion update request is used in the MSC and the AS or the S-CSCF Establish a new session and associate the AS or S-CSCF with the new session and the remote session.
- the SRVCC switching device in the S8HR roaming architecture includes a third processor 903 in addition to the third receiver 901 and the third transmitter 902, and the device may further include other components.
- a third memory 904 one or more third storage media 907 storing a third application 905 or third data 906 (eg, one or one in a Shanghai amount storage device) may also be included.
- the third memory 904 and the third storage medium 907 may be short-term storage or persistent storage.
- the program stored on the third storage medium 907 may include one or more modules (not shown), each of which may include a series of instruction operations in the SRVCC switching device under the S8HR roaming architecture.
- the third processor 902 can be configured to communicate with the third storage medium 907 to perform a series of instruction operations in the third storage medium 907 on the SRVCC switched device under the S8HR roaming architecture.
- the SRVCC switching device in the S8HR roaming architecture may further include one or more third power sources 908, one or more third wired or wireless network interfaces 909, one or more third input/output interfaces 910, and one Or more than one third keyboard 911, and/or one or more third operating systems 912, such as Windows ServerTM, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM, and the like.
- the third receiver 901, the third transmitter 902, and the third processor 903 included in the apparatus for SRVCC handover in the S8HR roaming architecture in the present invention may further have the following functions:
- the third receiver 901 is further configured to receive a first registration request sent by the user equipment;
- the third processor 903 is configured to determine, according to the first registration request, that the user equipment is an S8HR roaming user equipment;
- the third processor 903 is further configured to generate, according to the first registration request, a session transition identifier for the SRVCC handover, where the session transition identifier is a global unique identifier;
- the third transmitter 902 is further configured to send a second registration request to the query/service call session control function device I/S-CSCF, where the second registration request carries a session conversion identifier, and the second registration request is used to request registration for the user equipment.
- the I/S-CSCF is configured to enable the I/S-CSCF to send the session transition identifier to the MSC, so that the MSC sends the address information of the MSC to the first anchor device according to the session transition identifier.
- the S8HR roaming user equipment is a user equipment that roams into the roaming network, and needs to adopt a home routing HR communication mechanism based on the S8 interface to perform VoLTE.
- the session transition identifier is used to identify the first anchor device, so that the MSC can locate the first anchor device according to the session transition identifier during the SRVCC handover process.
- the third processor 903 is further configured to obtain location information of the user equipment, and subscription information of the user equipment, and determine, according to the location information and the subscription information, that the user equipment is an S8HR roaming user equipment.
- the first anchoring device comprises a first access switch forwarding control function device ATCF.
- the MSC in the roaming network is used as the signaling and media plane anchor.
- the MSC does not need to change the media path to the remote end, so that the signaling of the SRVCC handover process can be shortened.
- the media side switches distances, which greatly shortens the interruption delay and improves the user experience.
- FIG. 14 is a structural block diagram of an SRVCC switching apparatus in an S8HR roaming architecture according to an embodiment of the present invention.
- the apparatus is applied in a mobile switching center MSC in a roaming network corresponding to a user equipment, and is in an S8HR roaming architecture.
- the SRVCC switching device may vary considerably depending on configuration or performance, and may include one or more fourth receivers 1001 and fourth transmitters 1002.
- the fourth receiver 1001 is configured to receive a second call request sent by the first anchor device in the home network corresponding to the user equipment, where the second call request is used to request to establish a long-term evolution-based voice VoLTE call, and the second call Requesting to carry the first user plane resource information allocated by the first anchoring device for the VoLTE call;
- the fourth transmitter 1002 is configured to allocate second user plane resource information for the VoLTE call, and send a second call response to the first anchor device, where the second call response carries the second user plane resource information, and the first user plane resource information And the second user plane resource information is used to establish a user plane path for the VoLTE call between the first anchoring device and the MSC, where the user plane path is used to transmit the media data of the VoLTE call;
- the fourth transmitter 1002 is further configured to send a session conversion request to the first anchoring device according to the SRVCC switching request, where the session conversion request is used to request the first anchoring device to send the connection to the application server AS or the serving call session control function S-CSCF.
- the incoming conversion update request is used to establish a new session between the MSC and the AS or S-CSCF and associate the AS or S-CSCF with the new session and the remote session.
- the SRVCC switching device in the S8HR roaming architecture may include other components in addition to the fourth receiver 101 and the fourth transmitter 102 described above.
- a fourth memory 1003, one or more fourth storage media 1006 storing the fourth application 1004 or the fourth data 1005 (eg, one or one in a Shanghai amount storage device) may also be included.
- the fourth memory 1003 and the fourth storage medium 1006 may be short-term storage or persistent storage.
- the program may include one or more modules (not shown), each of which may include a series of instruction operations in the SRVCC switching device under the S8HR roaming architecture.
- the fourth processor 102 can be configured to communicate with the fourth storage medium 1006 to perform a series of instruction operations in the fourth storage medium 1006 on the SRVCC switched device under the S8HR roaming architecture.
- the apparatus for SRVCC switching in the S8HR roaming architecture may further include one or more fourth power sources 1007, one or more fourth wired or wireless network interfaces 1008, one or more fourth input/output interfaces 1009, one Or one or more fourth keyboards 1010, and/or one or more fourth operating systems 1011, such as Windows ServerTM, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM, and the like.
- the fourth receiver 1001 and the fourth transmitter 1002 included in the apparatus for SRVCC handover in the S8HR roaming architecture in the present invention may also have the following functions:
- the fourth receiver 1001 is further configured to receive a third registration request of the user equipment sent by the MME, where the third registration request carries the session conversion identifier generated by the first anchoring device;
- the fourth transmitter 1002 is further configured to send a fourth registration request to the first anchoring device according to the session transition identifier, where the fourth registration request carries the address information of the MSC.
- the MSC in the roaming network is used as the signaling and media plane anchor.
- the MSC does not need to change the media path to the remote end, so that the signaling of the SRVCC handover process can be shortened.
- the media side switches distances, which greatly shortens the interruption delay and improves the user experience.
- the embodiment of the present invention provides an SRVCC handover method in an S8HR roaming architecture.
- an anchor device such as an ATCF/ATGW
- the anchor is not added to a roaming network as a signaling and media plane before and after SRVCC handover.
- the anchor but directly anchors the signaling and media planes to the MSC in the roaming network, which is the MSC that will be responsible for controlling the UE for SRVCC handover, and the address of the MSC may not be configured in advance in the home network.
- the ATCF/ATGW functional entity.
- the method is applied between a first ATCF in a home network and an MSC in a roaming network, and the method includes:
- Step 1101 The first ATCF receives the first registration request sent by the user equipment, and determines, according to the first registration request, that the user equipment is an S8HR roaming user equipment.
- the S8HR roaming user equipment is a user equipment that roams into the roaming network and needs to use the home routing HR communication mechanism based on the S8 interface to perform VoLTE.
- step 301 The step of determining, by the first ATCF, that the user equipment is the S8HR roaming user equipment according to the first registration request is the same as step 301, and details are not described herein again.
- Step 1102 The first ATCF generates a session transition identifier for the SRVCC handover according to the first registration request, where the session transition identifier is a global unique identifier.
- the session transition identifier is used to identify the first ATCF, so that the MSC in the roaming network can locate the first ATCF in the home network according to the session transition identifier during the SRVCC handover procedure.
- the session conversion identifier needs to be a globally unique number, that is, the session conversion identifier is a global STN-SR, and the global STN-SR may include a national identifier and an STN-SR.
- the national identifier may be a country code or a PLMN (Public Land Mobile Network) ID (identification).
- the MSC in the roaming network may be addressed to the first anchoring device according to the session transition identifier.
- the problem that the MSC in the existing roaming network cannot locate the first anchoring device by using the session identifier generated by the first anchoring device is solved.
- Step 1103 The first ATCF sends a second registration request to the I/S-CSCF in the home network, where the second registration request carries the session conversion identifier.
- the second registration request is used to request the user equipment to register with the I/S-CSCF, so that the I/S-CSCF sends the session transition identifier to the MSC in the roaming network, so that the MSC forwards the identifier according to the session
- the ATCF sends the address information of the MSC.
- Step 1104 The I/S-CSCF receives the second registration request sent by the first ATCF, and inserts the session conversion identifier into the MME in the roaming network.
- This step can be achieved by the following steps (1) to (4), including:
- the I/S-CSCF sends a fifth registration request to the SCC AS in the home network, and the fifth registration request carries the session conversion identifier.
- the SCC AS receives the fifth registration request sent by the I/S-CSCF, and sends a data update request to the HSS in the home network, where the data update request carries the session conversion identifier.
- the HSS receives the data update request sent by the SCC AS, and sends an insert subscription data request to the MME in the roaming network, where the insertion subscription data request carries the session conversion identifier.
- the data update request may carry the identification information of the user equipment in addition to the session conversion identifier, and correspondingly, the HSS receives the data update request sent by the SCC AS, and updates from the data request. Obtaining the session conversion identifier and the identifier information of the user equipment, and obtaining the subscription information of the user equipment according to the identifier information of the user equipment, and modifying the session conversion identifier in the subscription information of the user equipment to the session conversion identifier.
- the insertion subscription data request may further carry the identification information of the user equipment and the subscription information of the user equipment.
- the MME receives the insertion subscription data request sent by the HSS, and stores the session exchange identifier.
- the MME When receiving the request for inserting the subscription data sent by the HSS, the MME sends an insertion subscription data response corresponding to the insertion subscription data request to the HSS, and the insertion subscription data response is used to indicate that the MME has successfully received the subscription data sent by the HSS.
- the MME obtains the identification information of the user equipment from the insertion subscription data request, the session conversion identifier and the subscription information of the user equipment, and the identifier information of the user equipment, the session conversion identifier, and the subscription information of the user equipment.
- Step 1105 The MME sends a third registration request to the MSC, where the third registration request carries the session conversion identifier generated by the first ATCF.
- the MME After receiving the session transition identifier, the MME selects an MSC that has an Sv interface with itself, and then sends a third registration request to the MSC.
- Step 1106 The MSC receives the third registration request of the user equipment sent by the MME, and sends a fourth registration request to the first ATCF according to the session conversion identifier, where the fourth registration request carries the address information of the MSC.
- Step 1107 The first ATCF receives the fourth registration request sent by the MSC, and stores the address information of the MSC.
- the first anchoring device needs to determine that the user equipment is an S8HR user equipment, and generate a globally uniquely-identified session conversion identifier for the S8HR user equipment, and transmit the session conversion identifier to the MSC, and the MSC converts the identifier according to the session.
- the first anchoring device is contacted such that the first anchoring device obtains the address information of the MSC.
- an embodiment of the present invention provides an SRVCC handover method in an S8HR roaming architecture, where the method is a method for a user equipment to actively call a peer device in an S8HR roaming architecture, and the method is applied between a first ATCF and an MSC. , the method includes:
- Step 1201 The first ATCF receives the first call request sent by the user equipment, and is the VoLTE.
- the call allocates the first user plane resource information, and sends a second call request to the MSC, where the second call request carries the first user plane resource information.
- the user equipment When the user equipment initiates a VoLTE call procedure in the roaming network, the user equipment sends a first call request to the first ATCF, where the first call request is used to request to establish a VoLTE call, where the first call request carries the identifier of the user equipment. Information and identification information of the called peer device.
- the first ATCF receives the first call request sent by the user equipment, and obtains the identifier information of the user equipment and the identifier information of the peer device from the first call request, and allocates the first user plane resource information to the user equipment.
- the first user plane resource information may be the address information of the first ATGW in the home network, obtain the stored address information of the MSC, and send a second call request to the MSC according to the address information of the MSC, the second call.
- the request is used to request to establish a VoLTE call, and the second call request may carry the identifier information of the user equipment and the identifier information of the peer device, in addition to the first user plane resource information.
- Step 1202 The MSC receives the second call request sent by the first ATCF, and allocates second user plane resource information for the VoLTE call, and sends a second call response to the first ATCF, where the second call response carries the second user plane resource. information.
- the MSC receives the second call request sent by the first ATCF, and obtains the first user plane resource information, the identifier information of the user equipment, and the identifier information of the peer device from the second call request, and allocates the second user to the VoLTE.
- the second user plane resource information may be the address information of the MGW (Media Gateway) in the roaming network, and send a second call response to the first ATCF, where the second call response carries the second user plane resource.
- Information, identification information of the user equipment, and identification information of the peer device may be the address information of the MGW (Media Gateway) in the roaming network.
- the first user plane resource information and the second user plane resource information are used to establish a user plane path for the VoLTE call between the MSC and the first ATCF.
- the MSC establishes a user plane path for the VoLTE call according to the first user plane resource information and the second user plane resource information, where the user plane path is used to transmit the media data of the VoLTE call.
- the first user plane resource information may be the address information of the first ATGW
- the second user plane resource may be the MGW address information
- the MSC establishes the VoLTE call according to the first user plane resource information and the second user plane resource information.
- the steps of the user plane path can be:
- the MSC sends a first setup request to the MGW according to the address of the MGW, where the first setup request carries the address of the first ATGW, the identifier information of the user equipment, and the identifier information of the peer device, Ask the MGW to establish a user plane path for the VoLTE call.
- the MGW receives the first setup request sent by the second ATCF, and establishes a user plane path with the first ATGW according to the address of the first ATGW, where the user plane path is used by the user equipment to talk with the peer device.
- Step 1203 The first ATCF receives the second call response sent by the MSC, and establishes a user plane path for the VoLTE call according to the first user plane resource information and the second user plane resource information.
- This step is the same as step 403 and will not be described here.
- Step 1204 The first ATCF sends the first user plane resource information to the peer device according to the identifier information of the peer device.
- the first ATCF sends the address of the first ATGW to the peer device according to the identifier information of the peer device, and the peer device receives the address of the first ATGW sent by the first ATCF, and the address of the first ATGW
- the process of calling the host address of the user equipment refer to step 404 for the specific process.
- the VoLTE call flow can also be optimized, and the optimized signaling and media plane path is as shown in FIG. 17; then, in step 1204, the first ATCF is further The second user plane resource information may be sent to the peer device, but the second user plane resource information may be sent to the peer device.
- the specific process may be:
- the first ATCF sends the address of the MGW to the peer device according to the identifier information of the peer device, and the peer device receives the address of the MGW sent by the first ATCF, and uses the address of the MGW as a call to the user equipment. Host address.
- the user equipment uses the address of the MGW as the host address of the peer device, the user plane path is shortened, and the data transmission delay is reduced.
- an embodiment of the present invention provides an SRVCC handover method in an S8HR roaming architecture, where the method is a method for a user equipment to be called by a peer device in an S8HR roaming architecture, and the method is applied between a first ATCF and an MSC. , the method includes:
- Step 1301 The first ATCF of the home network where the user equipment is located receives the first call request sent by the peer device, allocates first user plane resource information for the VoLTE call, and sends a second call request to the MSC.
- the second call request carries the first user plane resource information.
- the first ATCF receives the first call request from the peer device, and the first call request is used to request to establish a VoLTE call, where the first call request carries the identifier information of the peer device and Identification information of the called user equipment.
- the first ATCF receives the first call request sent by the peer device, and obtains the identifier information of the user equipment and the identifier information of the peer device from the first call request, and allocates the first user plane resource for the VoLTE call.
- the first user plane resource information may be the address information of the first ATGW in the home network, the first ATCF obtains the stored address information of the MSC, and sends a second call request to the second ATCF according to the address information of the MSC.
- the second call request may carry the identifier information of the user equipment and the identifier information of the peer device, in addition to the first user plane resource information.
- Step 1302 The MSC receives the second call request sent by the first ATCF, and allocates second user plane resource information for the VoLTE call, and sends a second call response to the first ATCF, where the second call response carries the second user plane resource information.
- the MSC receives the second call request sent by the first ATCF, and obtains the first user plane resource information, the identifier information of the user equipment, and the identifier information of the peer device from the second call request, and allocates the second message to the VoLTE call.
- the user plane resource information, the second user plane resource information may be the address information of the MGW in the roaming network, and send a second call response to the first ATCF, where the second call response carries the second user plane resource information, and the user equipment Identification information and identification information of the peer device.
- the first user plane resource information and the second user plane resource information are used to establish a user plane path between the MSC and the first ATCF for the VoLTE call.
- the MSC is configured according to the first user plane resource information and the second user plane resource information. Establishing a user plane path for the VoLTE call, the user plane path for transmitting media data of the VoLTE call.
- the first user plane resource information may be the address of the first ATGW
- the second user plane resource information may be the address of the MGW
- the MSC establishes the VoLTE call according to the first user plane resource information and the second user plane resource information.
- the steps of the user plane path can be:
- the MSC sends a first setup request to the MGW according to the address of the MGW, where the first setup request carries the address of the first ATGW, the identifier information of the user equipment, and the identifier information of the peer device, to request the MGW to establish a user for the VoLTE call. Face path.
- the MGW receives the first setup request sent by the MSC, and establishes a user plane path with the first ATGW according to the address of the first ATGW, where the user plane path is used by the user equipment to talk with the peer device.
- Step 1303 The first ATCF receives the second call response sent by the MSC, and establishes a user plane path for the VoLTE call according to the first user plane resource information and the second user plane resource information.
- the user plane resource information, the identifier information of the user equipment, and the identifier information of the peer device and establish a user plane path for the VoLTE call according to the first user plane resource information and the second user plane resource information.
- the step of the first ATCF establishing a user plane path for the VoLTE call according to the first user plane resource information and the second user plane resource information may be:
- the first ATCF sends a second setup request to the first ATGW according to the address of the first ATGW, where the second setup request carries the address of the MGW, the identifier information of the user equipment, and the identifier information of the peer device to request the first
- the ATGW establishes a user plane path for the VoLTE call.
- the first ATGW receives the second setup request sent by the first ATCF, and establishes a user plane path with the MGW according to the address of the MGW, where the user plane path is used by the user equipment to talk with the peer device.
- Step 1304 The first ATCF sends a third call request to the user equipment according to the identifier information of the user equipment, where the third call request carries the first user plane resource.
- the first ATCF sends an address of the first ATGW to the user equipment according to the identifier information of the user equipment, where the user equipment receives the address of the first ATGW sent by the first ATCF, and uses the address of the first ATGW as a call. Host address of the peer device.
- the data transmission delay is reduced in order to shorten the user plane path, and the VoLTE call flow may be further optimized.
- the first ATCF may not send the first user plane resource to the user equipment, but Sending the second user plane resource to the user equipment, where the specific process may be:
- the first ATCF sends the address of the MGW to the user equipment according to the identifier information of the user equipment, the user equipment receives the address of the MGW sent by the first ATCF, and uses the address of the MGW as the host address of the opposite device. .
- the user equipment uses the address of the MGW as the host address of the peer device, the user plane path is shortened, and the data transmission delay is reduced.
- an embodiment of the present invention provides an SRVCC handover method in an S8HR roaming architecture, where the method is a method for a user equipment to generate an SRVCC handover, and the method is applied between an MSC in a roaming network and a first ATCF.
- the method includes:
- Step 1401 The MSC receives an SRVCC handover request sent by the MME, where the SRVCC handover request carries a session transition identifier generated by the first ATCF, and sends a session transition request to the first ATCF according to the session transition identifier.
- the SRVCC is triggered when the user equipment cannot continue the VoLTE session due to moving out of the LTE network coverage area.
- the MME sends an SRVCC handover request to the MSC, where the SRVCC handover request carries the session transition identifier generated by the first ATCF in the IMS registration process of the user equipment, and the session transition identifier is Globally unique identifier.
- the MSC receives the SRVCC handover request sent by the MME, and obtains the session transition identifier generated by the first ATCF from the SRVCC handover request, and addresses the first ATCF according to the session transition identifier, and sends a session conversion request to the first ATCF, where the session is converted.
- the request carries the session conversion identifier and the session identifier of the current session of the user equipment and the address information of the corresponding media plane MGW.
- the session identifier is used to identify the user device and associate with the current session of the user device.
- Step 1402 The first ATCF receives the session conversion request sent by the MSC, and sends an access conversion update request to the AS or the S-CSCF according to the session conversion request.
- the access switch update request carries the session switch identifier and the session identifier.
- the network switch path of the remote device is not required to be switched in the embodiment of the present invention. Therefore, the access switch update request may not be carried.
- the second user plane resource information that is, the session description information, does not change.
- the access transition update request is used to establish a new session between the MSC and the AS or S-CSCF and associate the AS or S-CSCF with the new session and the remote session.
- Step 1403 The AS or the S-CSCF receives the access transition update request sent by the first ATCF, establishes a new session between the MSC and the AS or the MSC and the S-CSCF, and associates the new session with the remote session.
- the AS or the S-CSCF sends an access transition update response to the first ATCF, where the access switch update response is used to indicate that the AS or the S-CSCF has successfully switched the current session of the user equipment.
- the first ATCF sends an SRVCC handover response to the MSC, where the SRVCC handover response is used to indicate that the AS or the S-CSCF has successfully switched the current session of the user equipment.
- the media path of the MSC to the remote user equipment in the roaming network does not change during the SRVCC process, and only the access path switching between the MSC and the near-end user equipment is completed. That is, only the user equipment needs to access the GERAN/UTRAN network from the LTE network, and the entire SRVCC process can be completed, and the access leg media plane path can be completed over the long path (especially in the case of international roaming) compared to the prior art.
- the conversion can greatly reduce the SRVCC switching terminal delay.
- the signaling and media planes of the VoLTE call are still anchored to the MSC in the roaming network, and the signaling plane path is unchanged.
- the change is that the media plane path of the VoLTE call does not pass the first An ATCF is established directly at the calling place and the called place.
- the MSC in the roaming network is used as the signaling and media plane anchor.
- the MSC does not need to change the media path to the remote end, so that the signaling of the SRVCC handover process can be shortened.
- the media side switches distances, which greatly shortens the interruption delay and improves the user experience.
- the SRVCC switching in the S8HR roaming architecture provided by the foregoing embodiment is based on the division of the foregoing functional modules, the actual application may be performed as needed.
- the above function assignment is performed by different functional modules, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above.
- the method for the SRVCC handover in the S8HR roaming architecture and the method for the SRVCC handover in the S8HR roaming architecture are provided in the same manner. For details, refer to the method embodiment, and details are not described herein.
- a person skilled in the art may understand that all or part of the steps of implementing the above embodiments may be completed by hardware, or may be instructed by a program to execute related hardware, and the program may be stored in a computer readable storage medium.
- the storage medium mentioned may be a read only memory, a magnetic disk or an optical disk or the like.
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Abstract
本发明公开了一种S8HR漫游架构下的SRVCC切换的方法和装置,属于无线通信技术领域。方法包括:第一锚定设备接收第一呼叫请求,并为VoLTE呼叫分配第一用户面资源信息;向第二锚定设备发送第二呼叫请求,接收第二锚定设备发送的第二呼叫响应,第二呼叫响应携带第二锚定设备为VoLTE呼叫分配的第二用户面资源信息;在VoLTE呼叫发生SRVCC切换时,接收第二锚定设备发送的第一接入转换更新请求,并根据第一接入转换更新请求向应用服务器AS或服务呼叫会话控制功能S-CSCF发送第二接入转换更新请求,第一接入转换更新请求和第二接入转换更新请求用于请求在第二锚定设备与AS或在第二锚定设备与S-CSCF之间建立一个新的会话并使得AS或S-CSCF关联新的会话与远端会话。
Description
本发明涉及无线通信领域,特别涉及一种S8HR漫游架构下的SRVCC切换方法和装置。
在目前的通信系统中,大部分网络运营商都希望采用S8HR(Home Routed over S8interface,经S8口的归属路由)漫游架构为漫游用户提供VoLTE(基于长期演进的语音)业务;在该S8HR漫游架构下,当正在进行VoLTE通话的漫游用户设备从LTE(Long Term Evolution,长期演进)覆盖区进入非LTE覆盖区或LTE弱覆盖区时,就会触发SRVCC(Single Radio Voice Call Continuity,单一无线语音通话连续性)切换。
现有技术提供了一种在S8HR漫游架构下的SRVCC切换方法,过程可以为:漫游地网络中的MSC(Mobile Switching Center,移动交换中心)根据归属地网络中的锚定设备生成的STN-SR(session transfer number for SRVCC,用于SRVCC的会话转换标识)定位归属地网络中的锚定设备ATCF(access transfer control function,接入转发控制功能),向该ATCF发送会话转换请求流程,该会话转换请求携带用户设备正在进行会话的会话标识;ATCF根据该会话标识,获取该用户设备与对端设备之间正在进行的会话,将ATGW(access transfer gateway,接入转发网关)中存储的该会话的PS(packet switched,分组交换)接入腿媒体路径信息转换为CS(circuit switched,电路交换)接入腿媒体路径信息,并与归属地网络中的SCC AS(service centralization and continuity application server,SCC应用服务器)之间建立一个新的会话,通过该新的会话和该CS接入腿媒体路径信息实现该用户设备和该对端设备之间的通信,从而实现SRVCC切换。
在实现本发明的过程中,发明人发现现有技术至少存在以下问题:
由于漫游地网络中的MCS和归属地网络中的锚定设备ATCF之间的距离较
远,导致该MCS向该ATCF发送会话转换请求的路径较长,从而导致会话的PS接入腿媒体路径信息转换为CS接入腿媒体路径信息需要消耗大量的时间,SRVCC切换时的媒体面中断延较大,进而导致差的用户体验。
发明内容
为了解决现有技术的问题,本发明提供了一种S8HR漫游架构下的SRVCC切换方法和装置。技术方案如下:
第一方面,本发明提供了一种S8HR漫游架构下的SRVCC切换方法,所述方法包括:
用户设备对应的归属地网络中的第一锚定设备接收第一呼叫请求,所述第一呼叫请求用于请求建立基于长期演进的语音VoLTE呼叫,并为所述VoLTE呼叫分配第一用户面资源信息;
所述第一锚定设备向所述用户设备当前所在的漫游地网络中的第二锚定设备发送第二呼叫请求,所述第二呼叫请求携带所述第一用户面资源信息;
所述第一锚定设备接收所述第二锚定设备发送的第二呼叫响应,所述第二呼叫响应携带所述第二锚定设备为所述VoLTE呼叫分配的第二用户面资源信息,所述第一用户面资源信息和所述第二用户面资源信息用于在所述第二锚定设备和所述第一锚定设备之间为所述VoLTE呼叫建立用户面路径,所述用户面路径用于传输所述VoLTE呼叫的媒体数据;
在所述VoLTE呼叫发生单一无线语音通话连续性SRVCC切换时,所述第一锚定设备接收所述第二锚定设备发送的第一接入转换更新请求,并根据所述第一接入转换更新请求向应用服务器AS或服务呼叫会话控制功能S-CSCF发送第二接入转换更新请求,所述第一接入转换更新请求和所述第二接入转换更新请求用于请求在所述第二锚定设备与所述AS或在所述第二锚定设备与所述S-CSCF之间建立一个新的会话并使得所述AS或所述S-CSCF关联所述新的会话与远端会话。
在本发明实施例中,在第一锚定设备和第二锚定设备之间为VoLTE呼叫建立用户面路径,当发生SRVCC切换时,第一锚定设备接收第二锚定设备发送的第一接入转换更新请求,并根据该第一接入转换更新请求向AS或S-CSCF发送第二接入转换更新请求,从而在第二锚定设备与AS之间或在第二锚定设备与
S-CSCF之间建立一个新的会话并使得AS或S-CSCF关联该新的会话与远端会话。由于在发生SRVCC切换时,仅切换用户设备至第二锚定设备的接入腿和媒体面,第二锚定设备与远端用户设备的远端腿和媒体面不发生改变,这样可以缩短SRVCC切换过程的信令和媒体面切换距离,从而大大缩短中断时延,提高用户体验。
在一个可能的设计中,所述用户设备对应的归属地网络中的第一锚定设备接收第一呼叫请求之前,还包括:
所述第一锚定设备接收所述用户设备发送的第一注册请求,并根据所述第一注册请求确定所述用户设备为S8HR漫游用户设备;
所述第一锚定设备获取所述第二锚定设备的标识信息,所述第二锚定设备用于S8HR漫游架构下的漫游用户的SRVCC切换,并根据所述第二锚定设备的标识信息,向所述第二锚定设备发送所述用户设备的第二注册请求,所述第二注册请求用于为所述用户设备请求注册于所述第二锚定设备;
所述第一锚定设备接收所述第二锚定设备发送的所述第二注册请求对应的第二注册响应,所述第二注册响应携带所述第二锚定设备生成的用于SRVCC切换的会话转换标识;
所述第一锚定设备向查询/服务呼叫会话控制功能设备I/S-CSCF发送第三注册请求,所述第三注册请求中携带所述会话转换标识,所述第三注册请求用于为所述用户设备请求注册于所述I/S-CSCF。
在本发明实施例中,第一锚定设备判断用户设备是S8HR漫游用户设备并判断用户设备当前所在的位置,根据用户设备当前所在的位置,选择用户设备当前所在的漫游地网络中的第二锚定设备,并将第二锚定设备串入注册路径,从而后续在发生SRVCC切换时,能够缩短中断时延,提高用户体验。
在另一个可能的设计中,所述S8HR漫游用户设备为漫游入所述漫游地网络,且需要采用基于S8接口的归属路由HR通信机制进行VoLTE的用户设备。
在另一个可能的设计中,所述第一锚定设备获取所述第二锚定设备的标识信息,包括:
所述第一锚定设备获取所述用户设备当前所在的位置信息;
所述第一锚定设备根据所述位置信息,获取所述第二锚定设备的标识信息。
在本发明实施例中,第一锚定设备中配置有位置信息和锚定设备的标识信
息的对应关系,根据用户设备当前所在的位置信息,可以获取该位置信息对应的第二锚定设备的标识信息。
在另一个可能的设计中,所述会话转换标识用于在所述漫游地网络中标识所述第二锚定设备,以便在SRVCC切换过程中所述漫游地网络中的移动交换中心MSC能根据所述会话转换标识定位所述第二锚定设备。
在本发明实施例中,第二锚定设备生成会话转换标识,后续在发生SRVCC切换时,由于第二锚定设备和MSC都处于归属地网络中,因此,MSC能够根据该会话转换标识寻址到第二锚定设备。
在另一个可能的设计中,所述第一锚定设备据所述第一注册请求,确定所述用户设备为S8HR漫游用户设备,包括:
所述第一锚定设备获取所述用户设备当前所在的位置信息,以及所述用户设备的签约信息;
所述第一锚定设备根据所述位置信息和所述签约信息,确定所述用户设备为S8HR漫游用户设备。
在本发明实施例中,第一锚定设备可以根据用户设备当前所在的位置信息和该用户设备的签约信息,确定该用户设备是S8HR漫游用户设备。
在另一个可能的设计中,所述第一锚定设备包括第一接入转换转发控制功能设备ATCF。
在本发明实施例中,第一锚定设备包括第一ATCF,因此,在发生SRVCC切换过程中,第一ATCF作为切换前后的信令锚点,保证接入转换前后会话的连续性。
第二方面,本发明提供了一种S8HR漫游架构下的SRVCC切换方法,所述方法包括:
用户设备当前所在的漫游地网络中的第二锚定设备接收所述用户设备的归属地网络的第一锚定设备发送的第二呼叫请求,所述第二呼叫请求用于请求建立基于长期演进的语音VoLTE呼叫,且所述第二呼叫请求携带所述第一锚定设备为所述VoLTE呼叫分配的第一用户面资源信息;
所述第二锚定设备为所述VoLTE呼叫分配第二用户面资源信息,并向所述第一锚定设备发送第二呼叫响应,所述第二呼叫响应携带所述第二用户面资源
信息,所述第一用户面资源信息和所述第二用户面资源信息用于在所述第一锚定设备和所述第二锚定设备之间为所述VoLTE呼叫建立用户面路径,所述用户面路径用于传输所述VoLTE呼叫的媒体数据;
在所述VoLTE呼叫发生单一无线语音通话连续性SRVCC切换时,所述第二锚定设备接收所述用户设备漫游地的移动交换中心MSC发送的所述VoLTE呼叫的SRVCC接入转换消息后,所述第二锚定设备向所述第一锚定设备发送第一接入转换更新请求,所述第一接入转换更新请求用于请求所述第一锚定设备向应用服务器AS或服务呼叫会话控制功能S-CSCF发送第二接入转换更新请求,所述第一接入转换更新请求和所述第二接入转换更新请求用于请求在所述第二锚定设备与所述AS或在所述第二锚定设备与所述S-CSCF之间建立一个新的会话并使得所述AS或所述S-CSCF关联所述新的会话与远端会话。
在本发明实施例中,在漫游地网络中增加第二锚定设备作为SRVCC切换前后信令和媒体面的锚点,从而在发生SRVCC切换时,MSC向第二锚定设备发送SRVCC接入转换消息,由于MSC和第二锚定设备都处于漫游地网络中,因此,MSC与第二锚定设备之间的距离较近,从而该MSC向第二锚定设备发送会话转换请求的路径较短,大大缩短中断时延,提高用户体验。
在一个可能的设计中,所述用户设备当前所在的漫游地网络中的第二锚定设备接收所述用户设备的归属地网络的第一锚定设备发送的第二呼叫请求之前,还包括:
所述第二锚定设备接收所述第一锚定设备发送的第二注册请求,所述第二锚定设备用于S8HR漫游架构下的漫游用户的SRVCC切换;
所述第二锚定设备根据所述第二注册请求,生成用于SRVCC切换的会话转换标识;
所述第二锚定设备向所述第一锚定设备发送所述第二注册请求对应的第二注册响应,所述第二注册响应携带所述会话转换标识,以使所述第一锚定设备向查询/服务呼叫会话控制功能设备I/S-CSCF发送第三注册请求,所述第三注册请求中携带所述会话转换标识,所述第三注册请求用于为所述用户设备请求注册于所述I/S-CSCF。
在本发明实施例中,第二锚定设备生成用于SRVCC切换的会话转换标识,并将第二锚定设备串入注册路径,从而后续在发生SRVCC切换时,能够缩短中
断时延,提高用户体验。
在另一个可能的设计中,所述会话转换标识用于在所述漫游地网络中标识所述第二锚定设备,以便在SRVCC切换过程中MSC能根据所述会话转换标识定位所述第二锚定设备。
在本发明实施例中,第二锚定设备生成会话转换标识,后续在发生SRVCC切换时,由于第二锚定设备和MSC都处于归属地网络中,因此,MSC能够根据该会话转换标识寻址到第二锚定设备。
在另一个可能的设计中,所述第二锚定设备包括第二接入转换转发控制功能设备ATCF。
在本发明实施例中,第二锚定设备包括第二ATCF,因此,在发生SRVCC切换过程中,第二ATCF作为切换前后的信令锚点,保证接入转换前后会话的连续性。
第三方面,本发明实施例提供了一种S8HR漫游架构下的SRVCC切换方法,所述方法包括:
用户设备对应的归属地网络中的第一锚定设备接收第一呼叫请求,所述第一呼叫请求用于请求建立基于长期演进的语音VoLTE呼叫,并为所述VoLTE呼叫分配第一用户面资源信息;
所述第一锚定设备向用户设备当前所在的漫游地网络中的移动交换中心MSC发送第二呼叫请求,所述第二呼叫请求携带所述第一用户面资源信息;
所述第一锚定设备接收所述MSC发送的第二呼叫响应,所述第二呼叫响应携带所述MSC为所述VoLTE呼叫分配的第二用户面资源信息,所述第一用户面资源信息和所述第二用户面资源信息用于在所述MSC和所述第一锚定设备之间为所述VoLTE呼叫建立用户面路径,所述用户面路径用于传输所述VoLTE呼叫的媒体数据;
在所述VoLTE呼叫发生单一无线语音通话连续性SRVCC切换时,所述第一锚定设备接收所述MSC发送的会话转换请求,所述会话转换请求是所述MSC在接收移动性管理网元MME发送的SRVCC切换请求之后向所述第一锚定设备发送的;
所述第一锚定设备根据所述会话转换请求,向应用服务器AS或服务呼叫会
话控制功能S-CSCF发送接入转换更新请求,所述接入转换更新请求用于在所述MSC与所述AS或所述S-CSCF之间建立一个新的会话并使得所述AS或所述S-CSCF关联所述新的会话与远端会话。
在本发明实施例中,将漫游地网络中的MSC作为信令和媒体面锚点,在发生SRVCC切换时,MSC不需要改变到远端的媒体路径,这样可以缩短SRVCC切换过程的信令和媒体面切换距离,从而大大缩短中断时延,提高用户体验。
在一个可能的设计中,所述用户设备对应的归属地网络中的第一锚定设备接收第一呼叫请求之前,还包括:
所述第一锚定设备接收所述用户设备发送的第一注册请求,并根据所述第一注册请求确定所述用户设备为S8HR漫游用户设备;
所述第一锚定设备根据所述第一注册请求,生成用于SRVCC切换的会话转换标识,所述会话转换标识是个全局性唯一标识;
所述第一锚定设备向查询/服务呼叫会话控制功能设备I/S-CSCF发送第二注册请求,所述第二注册请求中携带所述会话转换标识,所述第二注册请求用于为所述用户设备请求注册于所述I/S-CSCF,以使所述I/S-CSCF将所述会话转换标识发送给所述MSC,以使所述MSC根据所述会话转换标识向所述第一锚定设备发送所述MSC的地址信息。
在本发明实施例中,第一锚定设备需要判断用户设备是S8HR用户设备,对S8HR用户设备生成全局性唯一标识的会话转换标识,将该会话转换标识传输给MSC,MSC根据该会话转换标识联系第一锚定设备。
在另一个可能的设计中,所述S8HR漫游用户设备为漫游入所述漫游地网络,且需要采用基于S8接口的归属路由HR通信机制进行VoLTE的用户设备。
在另一个可能的设计中,所述会话转换标识用于标识所述第一锚定设备,以便在SRVCC切换过程中所述MSC能根据所述会话转换标识定位所述第一锚定设备。
在本发明实施例中,由于第一锚定设备生成的会话转换标识为全局性唯一标识的会话转换标识,因此,漫游地网络中的MSC可以根据该会话转换标识寻址到第一锚定设备,解决了现有的漫游地网络中的MSC无法通过第一锚定设备生成的会话标识定位第一锚定设备的问题。
在另一个可能的设计中,所述第一锚定设备据所述第一注册请求,确定所
述用户设备为S8HR漫游用户设备,包括:
所述第一锚定设备获取所述用户设备当前所在的位置信息,以及所述用户设备的签约信息;
所述第一锚定设备根据所述位置信息和所述签约信息,确定所述用户设备为S8HR漫游用户设备。
在本发明实施例中,第一锚定设备可以根据用户设备当前所在的位置信息和该用户设备的签约信息,确定该用户设备是S8HR漫游用户设备。
在另一个可能的设计中,所述第一锚定设备包括第一接入转换转发控制功能设备ATCF。
在本发明实施例中,第一锚定设备包括第一ATCF,因此,在发生SRVCC切换过程中,第一ATCF作为切换前后的信令锚点,保证接入转换前后会话的连续性。
第四方面,本发明提供了一种S8HR漫游架构下的SRVCC切换方法,所述方法包括:
用户设备当前所在的漫游地网络中的移动交换中心MSC接收所述用户设备对应的归属地网络中的第一锚定设备发送的第二呼叫请求,所述第二呼叫请求用于请求建立基于长期演进的语音VoLTE呼叫,且所述第二呼叫请求携带所述第一锚定设备为所述VoLTE呼叫分配的第一用户面资源信息;
所述MSC为所述VoLTE呼叫分配第二用户面资源信息,并向所述第一锚定设备发送第二呼叫响应,所述第二呼叫响应携带所述第二用户面资源信息,所述第一用户面资源信息和所述第二用户面资源信息用于在所述第一锚定设备和所述MSC之间为所述VoLTE呼叫建立用户面路径,所述用户面路径用于传输所述VoLTE呼叫的媒体数据;
在所述VoLTE呼叫发生单一无线语音通话连续性SRVCC切换时,所述MSC接收移动性管理网元MME发送的SRVCC切换请求,并根据所述SRVCC切换请求向所述第一锚定设备发送会话转换请求,所述会话转换请求用于请求所述第一锚定设备向应用服务器AS或服务呼叫会话控制功能S-CSCF发送接入转换更新请求,所述接入转换更新请求用于在所述MSC与所述AS或所述S-CSCF之间建立一个新的会话并使得所述AS或所述S-CSCF关联所述新的会话与远端
会话。
在本发明实施例中,将漫游地网络中的MSC作为信令和媒体面锚点,在发生SRVCC切换时,MSC不需要改变到远端的媒体路径,这样可以缩短SRVCC切换过程的信令和媒体面切换距离,从而大大缩短中断时延,提高用户体验。
在一个可能的设计中,所述用户设备当前所在的漫游地网络中的移动交换中心MSC接收所述用户设备对应的归属地网络中的第一锚定设备发送的第二呼叫请求之前,还包括:
所述MSC接收所述MME发送的所述用户设备的第三注册请求,所述第三注册请求中携带所述第一锚定设备生成的会话转换标识;
所述MSC根据所述会话转换标识向所述第一锚定设备发送第四注册请求,所述第四注册请求中携带所述MSC的地址信息。
在本发明实施例中,MSC作为信令和媒体面锚点,MSC在用户设备的IMS注册过程中提前连续第一锚定设备,从而后续VoLTE呼叫过程中第一锚定设备将信令和媒体面锚定至MSC上。
第五方面,本发明提供了一种S8HR漫游架构下的SRVCC切换装置,所述装置应用在用户设备对应的归属地网络中的第一锚定设备中,包括:
第一接收器,用于接收第一呼叫请求,所述第一呼叫请求用于请求建立基于长期演进的语音VoLTE呼叫,并为所述VoLTE呼叫分配第一用户面资源信息;
第一发射器,用于向所述用户设备当前所在的漫游地网络中的第二锚定设备发送第二呼叫请求,所述第二呼叫请求携带所述第一用户面资源信息;
所述第一接收器,还用于接收所述第二锚定设备发送的第二呼叫响应,所述第二呼叫响应携带所述第二锚定设备为所述VoLTE呼叫分配的第二用户面资源信息,所述第一用户面资源信息和所述第二用户面资源信息用于在所述第二锚定设备和所述第一锚定设备之间为所述VoLTE呼叫建立用户面路径,所述用户面路径用于传输所述VoLTE呼叫的媒体数据;
所述第一接收器,还用于在所述VoLTE呼叫发生单一无线语音通话连续性SRVCC切换时,接收所述第二锚定设备发送的第一接入转换更新请求;
所述第一发射器,还用于根据所述第一接入转换更新请求向应用服务器AS或服务呼叫会话控制功能S-CSCF发送第二接入转换更新请求,所述第一接入转
换更新请求和所述第二接入转换更新请求用于请求在所述第二锚定设备与所述AS或在所述第二锚定设备与所述S-CSCF之间建立一个新的会话并使得所述AS或所述S-CSCF关联所述新的会话与远端会话。
在一个可能的设计中,所述装置还包括:第一处理器;
所述第一接收器,还用于接收所述用户设备发送的第一注册请求;
所述第一处理器,用于根据所述第一注册请求确定所述用户设备为S8HR漫游用户设备;
所述第一处理器,还用于获取所述第二锚定设备的标识信息,所述第二锚定设备用于S8HR漫游架构下的漫游用户的SRVCC切换;
所述第一发射器,还用于根据所述第二锚定设备的标识信息,向所述第二锚定设备发送所述用户设备的第二注册请求,所述第二注册请求用于为所述用户设备请求注册于所述第二锚定设备;
所述第一接收器,还用于接收所述第二锚定设备发送的所述第二注册请求对应的第二注册响应,所述第二注册响应携带所述第二锚定设备生成的用于SRVCC切换的会话转换标识;
所述第一发射器,还用于向查询/服务呼叫会话控制功能设备I/S-CSCF发送第三注册请求,所述第三注册请求中携带所述会话转换标识,所述第三注册请求用于为所述用户设备请求注册于所述I/S-CSCF。
在另一个可能的设计中,所述S8HR漫游用户设备为漫游入所述漫游地网络,且需要采用基于S8接口的归属路由HR通信机制进行VoLTE的用户设备。
在另一个可能的设计中,所述第一处理器,还用于获取所述用户设备当前所在的位置信息;所根据所述位置信息,获取所述第二锚定设备的标识信息。
在另一个可能的设计中,所述会话转换标识用于在所述漫游地网络中标识所述第二锚定设备,以便在SRVCC切换过程中所述漫游地网络中的移动交换中心MSC能根据所述会话转换标识定位所述第二锚定设备。
在另一个可能的设计中,所述第一处理器,还用于获取所述用户设备当前所在的位置信息,以及所述用户设备的签约信息;根据所述位置信息和所述签约信息,确定所述用户设备为S8HR漫游用户设备。
在另一个可能的设计中,所述第一锚定设备包括第一接入转换转发控制功能设备ATCF。
第六方面,本发明提供了一种S8HR漫游架构下的SRVCC切换装置,所述装置应用在用户设备当前所在的漫游地网络中的第二锚定设备中,包括:
第二接收器,用于接收所述用户设备的归属地网络的第一锚定设备发送的第二呼叫请求,所述第二呼叫请求用于请求建立基于长期演进的语音VoLTE呼叫,且所述第二呼叫请求携带所述第一锚定设备为所述VoLTE呼叫分配的第一用户面资源信息;
第二发射器,用于为所述VoLTE呼叫分配第二用户面资源信息,并向所述第一锚定设备发送第二呼叫响应,所述第二呼叫响应携带所述第二用户面资源信息,所述第一用户面资源信息和所述第二用户面资源信息用于在所述第二锚定设备和所述第一锚定设备之间为所述VoLTE呼叫建立用户面路径,所述用户面路径用于传输所述VoLTE呼叫的媒体数据;
所述第二发射器,还用于在所述VoLTE呼叫发生单一无线语音通话连续性SRVCC切换时,接收所述用户设备漫游地的移动交换中心MSC发送的所述VoLTE呼叫的SRVCC接入转换消息后,向所述第一锚定设备发送第一接入转换更新请求,所述第一接入转换更新请求用于请求所述第一锚定设备向应用服务器AS或服务呼叫会话控制功能S-CSCF发送第二接入转换更新请求,所述第一接入转换更新请求和所述第二接入转换更新请求用于请求在所述第二锚定设备与所述AS或在所述第二锚定设备与所述S-CSCF之间建立一个新的会话并使得所述AS或所述S-CSCF关联所述新的会话与远端会话。
在一个可能的设计中,所述装置还包括:第二处理器;
所述第二接收器,还用于接收所述第一锚定设备发送的第二注册请求,所述第二锚定设备用于S8HR漫游架构下的漫游用户的SRVCC切换;
所述第二处理器,用于根据所述第二注册请求,生成用于SRVCC切换的会话转换标识;
所述第二发射器,还用于向所述第一锚定设备发送所述第二注册请求对应的第二注册响应,所述第二注册响应携带所述会话转换标识,以使所述第一锚定设备向查询/服务呼叫会话控制功能设备I/S-CSCF发送第三注册请求,所述第三注册请求中携带所述会话转换标识,所述第三注册请求用于为所述用户设备请求注册于所述I/S-CSCF。
在另一个可能的设计中,所述会话转换标识用于在所述漫游地网络中标识所述第二锚定设备,以便在SRVCC切换过程中MSC能根据所述会话转换标识定位所述第二锚定设备。
在另一个可能的设计中,所述第二锚定设备包括第二接入转换转发控制功能设备ATCF。
第七方面,本发明提供了一种S8HR漫游架构下的SRVCC切换装置,,所述装置应用在用户设备对应的归属地网络中的第一锚定设备中,包括:
第三接收器,用于接收第一呼叫请求,所述第一呼叫请求用于请求建立基于长期演进的语音VoLTE呼叫,并为所述VoLTE呼叫分配第一用户面资源信息;
第三发射器,用于向用户设备当前所在的漫游地网络中的移动交换中心MSC发送第二呼叫请求,所述第二呼叫请求携带所述第一用户面资源信息;
所述第三接收器,还用于接收所述MSC发送的第二呼叫响应,所述第二呼叫响应携带所述MSC为所述VoLTE呼叫分配的第二用户面资源信息,所述第一用户面资源信息和所述第二用户面资源信息用于在所述MSC和所述第一锚定设备之间为所述VoLTE呼叫建立用户面路径,所述用户面路径用于传输所述VoLTE呼叫的媒体数据;
所述第三接收器,还用于在所述VoLTE呼叫发生单一无线语音通话连续性SRVCC切换时,接收所述MSC发送的会话转换请求,所述会话转换请求是所述MSC在接收移动性管理网元MME发送的SRVCC切换请求之后向所述第一锚定设备发送的;
所述第三发射器,还用于根据所述会话转换请求,向应用服务器AS或服务呼叫会话控制功能S-CSCF发送接入转换更新请求,所述接入转换更新请求用于在所述MSC与所述AS或所述S-CSCF之间建立一个新的会话并使得所述AS或所述S-CSCF关联所述新的会话与远端会话。
在一个可能的设计中,所述装置还包括:第三处理器;
所述第三接收器,还用于接收所述用户设备发送的第一注册请求;
所述第三处理器,用于根据所述第一注册请求确定所述用户设备为S8HR漫游用户设备;
所述第三处理器,还用于根据所述第一注册请求,生成用于SRVCC切换的
会话转换标识,所述会话转换标识是个全局性唯一标识;
所述第三发射器,还用于向查询/服务呼叫会话控制功能设备I/S-CSCF发送第二注册请求,所述第二注册请求中携带所述会话转换标识,所述第二注册请求用于为所述用户设备请求注册于所述I/S-CSCF,以使所述I/S-CSCF将所述会话转换标识发送给所述MSC,以使所述MSC根据所述会话转换标识向所述第一锚定设备发送所述MSC的地址信息。
在另一个可能的设计中,所述S8HR漫游用户设备为漫游入所述漫游地网络,且需要采用基于S8接口的归属路由HR通信机制进行VoLTE的用户设备。
在另一个可能的设计中,所述会话转换标识用于标识所述第一锚定设备,以便在SRVCC切换过程中所述MSC能根据所述会话转换标识定位所述第一锚定设备。
在另一个可能的设计中,所述第三处理器,还用于获取所述用户设备当前所在的位置信息,以及所述用户设备的签约信息;根据所述位置信息和所述签约信息,确定所述用户设备为S8HR漫游用户设备。
在另一个可能的设计中,所述第一锚定设备包括第一接入转换转发控制功能设备ATCF。
第八方面,本发明提供了一种S8HR漫游架构下的SRVCC切换装置,所述装置应用在用户设备当前所在的漫游地网络中的移动交换中心MSC中,包括:
第四接收器,用于接收所述用户设备对应的归属地网络中的第一锚定设备发送的第二呼叫请求,所述第二呼叫请求用于请求建立基于长期演进的语音VoLTE呼叫,且所述第二呼叫请求携带所述第一锚定设备为所述VoLTE呼叫分配的第一用户面资源信息;
第四发射器,用于为所述VoLTE呼叫分配第二用户面资源信息,并向所述第一锚定设备发送第二呼叫响应,所述第二呼叫响应携带所述第二用户面资源信息,所述第一用户面资源信息和所述第二用户面资源信息用于在所述第一锚定设备和所述MSC之间为所述VoLTE呼叫建立用户面路径,所述用户面路径用于传输所述VoLTE呼叫的媒体数据;
所述第四接收器,还用于在所述VoLTE呼叫发生单一无线语音通话连续性SRVCC切换时,接收移动性管理网元MME发送的SRVCC切换请求;
所述第四发射器,还用于根据所述SRVCC切换请求向所述第一锚定设备发送会话转换请求,所述会话转换请求用于请求所述第一锚定设备向应用服务器AS或服务呼叫会话控制功能S-CSCF发送接入转换更新请求,所述接入转换更新请求用于在所述MSC与所述AS或所述S-CSCF之间建立一个新的会话并使得所述AS或所述S-CSCF关联所述新的会话与远端会话。
在一个可能的设计中,所述第四接收器,还用于接收所述MME发送的所述用户设备的第三注册请求,所述第三注册请求中携带所述第一锚定设备生成的会话转换标识;
所述第四发射器,还用于根据所述会话转换标识向所述第一锚定设备发送第四注册请求,所述第四注册请求中携带所述MSC的地址信息。
在本发明实施例中,在第一锚定设备和第二锚定设备之间为VoLTE呼叫建立用户面路径,当发生SRVCC切换时,第一锚定设备接收第二锚定设备发送的第一接入转换更新请求,并根据该第一接入转换更新请求向AS或S-CSCF发送第二接入转换更新请求,从而在第二锚定设备与AS之间或在第二锚定设备与S-CSCF之间建立一个新的会话并使得AS或S-CSCF关联该新的会话与远端会话。由于在发生SRVCC切换时,仅切换用户设备至第二锚定设备的接入腿和媒体面,第二锚定设备与远端用户设备的远端腿和媒体面不发生改变,这样可以缩短SRVCC切换过程的信令和媒体面切换距离,从而大大缩短中断时延,提高用户体验。
图1是本发明实施例1提供的一种S8HR漫游架构下的SRVCC切换的应用场景图;
图2是本发明实施例1提供的一种第二锚定设备将被串入VoLTE呼叫的信令路径和用户面路径的示意图;
图3是本发明实施例1提供的一种S8HR漫游架构下的SRVCC切换的示意图;
图4是本发明实施例1提供的一种S8HR漫游架构下的SRVCC切换的装置结构示意图;
图5是本发明实施例1提供的另一种S8HR漫游架构下的SRVCC切换的装
置结构示意图;
图6是本发明实施例1提供的一种S8HR漫游架构下用户设备注册于第二ATCF的方法流程图;
图7是本发明实施例1提供的一种S8HR漫游架构下用户设备主动呼叫对端设备的方法流程图;
图8是本发明实施例1提供的一种S8HR漫游架构下的信令和媒体面路径的示意图;
图9是本发明实施例1提供的一种S8HR漫游架构下用户设备被对端设备呼叫的方法流程图;
图10是本发明实施例1提供的一种S8HR漫游架构下的SRVCC切换的方法流程图;
图11是本发明实施例2提供的一种S8HR漫游架构下的SRVCC切换的应用场景图;
图12是本发明实施例2提供的一种MSC将被串入VoLTE呼叫的信令路径和用户面路径的示意图;
图13是本发明实施例2提供的一种S8HR漫游架构下的SRVCC切换的装置结构示意图;
图14是本发明实施例2提供的另一种S8HR漫游架构下的SRVCC切换的装置结构示意图;
图15是本发明实施例2提供的一种S8HR漫游架构下用户设备注册于MSC的方法流程图;
图16是本发明实施例2提供的一种S8HR漫游架构下用户设备主动呼叫对端设备的方法流程图;
图17是本发明实施例2提供的一种S8HR漫游架构下的信令和媒体面路径的示意图;
图18是本发明实施例2提供的一种S8HR漫游架构下用户设备被对端设备呼叫的方法流程图;
图19是本发明实施例2提供的一种S8HR漫游架构下的SRVCC切换的方法流程图;
图20是本发明实施例2提供的一种S8HR漫游架构下的信令和媒体面路径
的示意图。
为使本发明的目的、技术方案和优点更加清楚,下面将结合附图对本发明实施方式作进一步地详细描述。
实施例1
本发明实施例提供了一种S8HR漫游架构下的SRVCC切换方法的应用场景,参见图1,用户设备从归属地网络漫游(HPLMN)至漫游地网络(VPLMN),归属地网络和漫游地网络之间漫游协议协商采用S8HR架构为用户设备提供VolTE业务;并且,用户设备在使用VoLTE业务的过程中有可能触发SRVCC流程。
在本发明实施例中为了减少SRVCC切换的切换时延,可以在漫游地网络中增加锚定设备,为了便于与归属地网络中的锚定设备进行区分,将用户设备的归属地网络中的锚定设备称为第一锚定设备,将用户设备当前所在的漫游地网络中的锚定设备称为第二锚定设备。
第二锚定设备的地址信息可以配置在第一锚定设备中,并且,由于该用户设备可能漫游至不同的漫游地网络中,因此,第一锚定设备中可能配置着多个第二锚定设备的地址信息。
第一锚定设备包括第一ATCF和第一ATGW,第二锚定设备包括第二ATCF和第二ATGW,第一ATCF和第一ATGW可以独立部署,也可以合并部署,同样,第二ATCF和第二ATGW可以独立部署,也可以合并部署。
当用户设备在漫游地网络中发起IMS注册过程时,归属地网络中的IMS网络设备将注册信令发给用户设备当前所在的漫游地网络中的第二锚定设备,从而将其串入IMS注册路径,由第二锚定设备生成SRVCC切换过程中必不可少的会话转换标识,该会话转换标识被发往归属地网络并经由HSS传至漫游地网络服务该用户设备的MME,该会话转换标识将在SRVCC过程中由MME传至归属地网络中的MSC,用于MSC向IMS核心网设备发起session transfer(会话转换)流程。
当用户设备发起VoLTE呼叫流程时(包括该用户设备作为主叫或作为被
叫),第二锚定设备将被串入VoLTE呼叫的信令路径和用户面路径,示意图如图2,第二锚定设备将成为漫游地网络中的一个锚定。
当用户设备因移动出LTE覆盖区域进入2G(2rd Generation,第二代移动通信技术)/3G(3rd Generation,第三代移动通信技术)网络覆盖区而触发SRVCC切换流程时,归属地网络中的MSC根据第二锚定设备生成的会话转换标识寻址到第二锚定设备,从而触发会话切换流程,用户设备至IMS核心网的接入腿将从原来的PS域切换至新的CS域,如图3所示。但第二锚定设备至远端用户设备的远端腿不会改变,因MSC和第二锚定设备同处于漫游地网络中,距离较近,因此可以减少SRVCC切换时延,从而使得会话终端时延不至于太高而使用户明显感知,提高了用户体验。
参见图4,图4是本发明实施例提供的一种S8HR漫游架构下的SRVCC切换装置结构框图,该装置应用在用户设备对应的归属地网络中的第一锚定设备中,并且S8HR漫游架构下的SRVCC切换装置可因配置或性能不同而产生比较大的差异,可以包括一个或一个以上第一接收器101和第一发射器102。
第一接收器101,用于接收第一呼叫请求,第一呼叫请求用于请求建立基于长期演进的语音VoLTE呼叫,并为VoLTE呼叫分配第一用户面资源信息;
第一发射器102,用于向用户设备当前所在的漫游地网络中的第二锚定设备发送第二呼叫请求,第二呼叫请求携带第一用户面资源信息;
第一接收器101,还用于接收第二锚定设备发送的第二呼叫响应,第二呼叫响应携带第二锚定设备为VoLTE呼叫分配的第二用户面资源信息,第一用户面资源信息和第二用户面资源信息用于在第二锚定设备和第一锚定设备之间为VoLTE呼叫建立用户面路径,用户面路径用于传输VoLTE呼叫的媒体数据;
第一接收器101,还用于在VoLTE呼叫发生单一无线语音通话连续性SRVCC切换时,接收第二锚定设备发送的第一接入转换更新请求;
第一发射器102,还用于根据第一接入转换更新请求向应用服务器AS或服务呼叫会话控制功能S-CSCF发送第二接入转换更新请求,第一接入转换更新请求和第二接入转换更新请求用于请求在第二锚定设备与AS或在第二锚定设备与S-CSCF之间建立一个新的会话并使得AS或S-CSCF关联新的会话与远端会话。
可选的,S8HR漫游架构下的SRVCC切换装置除了包括上述第一接收器101和第一发射器102外,还包括:第一处理器103;该装置还可以包括其他部件。例如,还可以包括第一存储器104,一个或一个以上存储第一应用程序105或第一数据106的第一存储介质107(例如一个或一个以上海量存储设备)。其中,第一存储器104和第一存储介质107可以是短暂存储或持久存储。存储在第一存储介质107的程序可以包括一个或一个以上模块(图示没标出),每个模块可以包括S8HR漫游架构下的SRVCC切换的装置中的一系列指令操作。更进一步地,第一处理器102可以设置为与第一存储介质107通信,在S8HR漫游架构下的SRVCC切换的装置上执行第一存储介质107中的一系列指令操作。
可选的,S8HR漫游架构下的SRVCC切换的装置还可以包括一个或一个以上第一电源108,一个或一个以上第一有线或无线网络接口109,一个或一个以上第一输入输出接口110,一个或一个以上第一键盘111,和/或,一个或一个以上第一操作系统112,例如Windows ServerTM,Mac OS XTM,UnixTM,LinuxTM,FreeBSDTM等等。
在本发明中S8HR漫游架构下的SRVCC切换的装置包括的第一接收器101、第一发射器102和第一处理器103还可以具有以下功能:
第一接收器101,还用于接收用户设备发送的第一注册请求;
第一处理器103,用于根据第一注册请求确定用户设备为S8HR漫游用户设备;
第一处理器103,还用于获取第二锚定设备的标识信息,第二锚定设备用于S8HR漫游架构下的漫游用户的SRVCC切换;
第一发射器102,还用于根据第二锚定设备的标识信息,向第二锚定设备发送用户设备的第二注册请求,第二注册请求用于为用户设备请求注册于第二锚定设备;
第一接收器101,还用于接收第二锚定设备发送的第二注册请求对应的第二注册响应,第二注册响应携带第二锚定设备生成的用于SRVCC切换的会话转换标识;
第一发射器102,还用于向查询/服务呼叫会话控制功能设备I/S-CSCF发送第三注册请求,第三注册请求中携带会话转换标识,第三注册请求用于为用户设备请求注册于I/S-CSCF。
可选的,S8HR漫游用户设备为漫游入漫游地网络,且需要采用基于S8接口的归属路由HR通信机制进行VoLTE的用户设备。
在另一个可能的设计中,第一处理器,还用于获取用户设备当前所在的位置信息;所根据位置信息,获取第二锚定设备的标识信息。
可选的,会话转换标识用于在漫游地网络中标识第二锚定设备,以便在SRVCC切换过程中漫游地网络中的移动交换中心MSC能根据会话转换标识定位第二锚定设备。
可选的,第一处理器103,还用于获取用户设备当前所在的位置信息,以及用户设备的签约信息;根据位置信息和签约信息,确定用户设备为S8HR漫游用户设备。
可选的,第一锚定设备包括第一接入转换转发控制功能设备ATCF。
在本发明实施例中,在第一锚定设备和第二锚定设备之间为VoLTE呼叫建立用户面路径,当发生SRVCC切换时,第一锚定设备接收第二锚定设备发送的第一接入转换更新请求,并根据该第一接入转换更新请求向AS或S-CSCF发送第二接入转换更新请求,从而在第二锚定设备与AS之间或在第二锚定设备与S-CSCF之间建立一个新的会话并使得AS或S-CSCF关联该新的会话与远端会话。由于在发生SRVCC切换时,仅切换用户设备至第二锚定设备的接入腿和媒体面,第二锚定设备与远端用户设备的远端腿和媒体面不发生改变,这样可以缩短SRVCC切换过程的信令和媒体面切换距离,从而大大缩短中断时延,提高用户体验。
参见图5,图5是本发明实施例提供的一种S8HR漫游架构下的SRVCC切换装置结构框图,该装置应用在用户设备对应的漫游地网络中的第二锚定设备中,并且S8HR漫游架构下的SRVCC切换装置可因配置或性能不同而产生比较大的差异,可以包括一个或一个以上第二接收器201和第二发射器202。
第二接收器201,用于接收用户设备的归属地网络的第一锚定设备发送的第二呼叫请求,第二呼叫请求用于请求建立基于长期演进的语音VoLTE呼叫,且第二呼叫请求携带第一锚定设备为VoLTE呼叫分配的第一用户面资源信息;
第二发射器202,用于为VoLTE呼叫分配第二用户面资源信息,并向第一锚定设备发送第二呼叫响应,第二呼叫响应携带第二用户面资源信息,第一用
户面资源信息和第二用户面资源信息用于在第二锚定设备和第一锚定设备之间为VoLTE呼叫建立用户面路径,用户面路径用于传输VoLTE呼叫的媒体数据;
第二发射器202,还用于在VoLTE呼叫发生单一无线语音通话连续性SRVCC切换时,接收用户设备漫游地的移动交换中心MSC发送的VoLTE呼叫的SRVCC接入转换消息后,向第一锚定设备发送第一接入转换更新请求,第一接入转换更新请求用于请求第一锚定设备向应用服务器AS或服务呼叫会话控制功能S-CSCF发送第二接入转换更新请求,第一接入转换更新请求和第二接入转换更新请求用于请求在第二锚定设备与AS或在第二锚定设备与S-CSCF之间建立一个新的会话并使得AS或S-CSCF关联新的会话与远端会话。
可选的,S8HR漫游架构下的SRVCC切换装置除了包括上述第二接收器201和第二发射器202外,还包括:第二处理器203;该装置还可以包括其他部件。例如,还可以包括第二存储器204,一个或一个以上存储第二应用程序205或第二数据206的第二存储介质207(例如一个或一个以上海量存储设备)。其中,第二存储器204和第二存储介质207可以是短暂存储或持久存储。存储在第二存储介质207的程序可以包括一个或一个以上模块(图示没标出),每个模块可以包括S8HR漫游架构下的SRVCC切换的装置中的一系列指令操作。更进一步地,第二处理器202可以设置为与第二存储介质207通信,在S8HR漫游架构下的SRVCC切换的装置上执行第二存储介质207中的一系列指令操作。
可选的,S8HR漫游架构下的SRVCC切换的装置还可以包括一个或一个以上第二电源208,一个或一个以上第二有线或无线网络接口209,一个或一个以上第二输入输出接口210,一个或一个以上第二键盘211,和/或,一个或一个以上第二操作系统212,例如Windows ServerTM,Mac OS XTM,UnixTM,LinuxTM,FreeBSDTM等等。
在本发明中S8HR漫游架构下的SRVCC切换的装置包括的第二接收器201、第二发射器202和第二处理器203还可以具有以下功能:
第二接收器201,还用于接收第一锚定设备发送的第二注册请求,第二锚定设备用于S8HR漫游架构下的漫游用户的SRVCC切换;
第二处理器203,用于根据第二注册请求,生成用于SRVCC切换的会话转换标识;
第二发射器202,还用于向第一锚定设备发送第二注册请求对应的第二注册
响应,第二注册响应携带会话转换标识,以使第一锚定设备向查询/服务呼叫会话控制功能设备I/S-CSCF发送第三注册请求,第三注册请求中携带会话转换标识,第三注册请求用于为用户设备请求注册于I/S-CSCF。
可选的,会话转换标识用于在漫游地网络中标识第二锚定设备,以便在SRVCC切换过程中MSC能根据会话转换标识定位第二锚定设备。
可选的,第二锚定设备包括第二接入转换转发控制功能设备ATCF。
在本发明实施例中,在漫游地网络中增加第二锚定设备作为SRVCC切换前后信令和媒体面的锚点,从而在发生SRVCC切换时,MSC向第二锚定设备发送SRVCC接入转换消息,由于MSC和第二锚定设备都处于漫游地网络中,因此,MSC与第二锚定设备之间的距离较近,从而该MSC向第二锚定设备发送会话转换请求的路径较短,大大缩短中断时延,提高用户体验。
本发明实施例提供了一种S8HR漫游架构下的SRVCC切换方法,在本发明实施例中,以在漫游地网络中部署ATCF和ATWG作为信令和媒体面锚点,也即第二锚定设备包括ATCF和ATGW,为了便于与归属地网络中的第一锚定设备包括的ATCF和ATGW进行区分,将第一锚定设备包括的ATCF和ATGW分别称为第一ATCF和第一ATGW,将第二锚定设备包括的ATCF和ATGW分别称为第二ATCF和第二ATGW。
第一ATCF和第一ATGW可以独立部署,也可以合并部署,同样,第二ATCF和第二ATGW可以独立部署,也可以合并部署。在本发明实施例中,以将第一ATCF和第一ATGW独立部署,第二ATCF和第二ATGW独立部署为例进行说明。
参见图6,本发明实施例提供了一种S8HR漫游架构下的SRVCC切换方法,该方法是S8HR漫游架构下用户设备注册于第二ATCF的方法流程,该方法应用在第一ATCF和第二ATCF之间,该方法包括:
步骤301:第一ATCF接收用户设备发送的第一注册请求,并根据第一注册请求确定该用户设备为S8HR漫游用户设备。
S8HR漫游用户设备为漫游入漫游地网络,且需要采用基于S8接口的归属路由HR通信机制进行VoLTE的用户设备。
当用户设备从归属地网络漫游至漫游地网络中并且EPS(Evolved Packet
System,演进分组系统)附着后,若用户设备想要使用VoLTE业务时,用户设备必须先完成用户设备至归属地网络中的IMS(IP Multimedia Subsystem,IP多媒体子系统)核心网的注册流程,此时,用户设备向归属地网络中的第一ATCF发送第一注册请求,第一注册请求用于请求注册于第一ATCF。
用户设备经漫游地EPS网络中对应的IMS APN(access point name,接入点名称)的PDN(Packet Data Network,分组数据网)连接的默认承载,向归属地网络中的第一ATCF发送第一注册请求,EPS网络为用户设备至IMS核心网的一个接入网。第一ATCF接收用户设备发送的第一注册请求,并通过以下步骤(1)和(2)确定该用户设备是否为S8HR漫游用户设备,如果该用户设备为S8HR漫游用户设备时,执行步骤302。
(1)第一ATCF获取用户设备当前所在的位置信息,以及该用户设备的签约信息;
根据现有技术,当用户设备漫游到漫游地网络并注册时,用户设备的归属地网络中的HSS(Home Subscriber Server,归属用户服务器)和/或P-CSCF(Proxy-call Session Control Function,代理-呼叫会话控制功能)可以获知用户设备当前所在的位置信息;并且,HSS和/或P-CSCF绑定该用户设备的标识信息和该位置信息的对应关系。则本步骤可以通过以下步骤(1-1)和(1-2)实现,包括:
(1-1):第一ATCF从HSS或P-CSCF中获取用户设备当前所在的位置信息。
具体地,第一ATCF根据该用户设备的标识信息,从HSS中的标识信息和位置信息的对应关系中获取该用户设备当前所在的位置信息;或者,
第一ATCF根据该用户设备的标识信息,从P-CSCF中的标识信息和位置信息的对应关系中获取该用户设备当前所在的位置信息。
标识信息可以为用户设备的电话号码或IMSI(International Mobile Subscriber Identity,国际移动用户识别码)等。位置信息可以包括地理位置信息(如经度和纬度等)或网络位置信息(如服务网络标识,小区标识,跟踪区标识TAI(tracking area identity,跟踪区标识)等)。
第一注册请求中至少携带该用户设备的标识信息,还可以携带该用户设备当前所在的位置信息;当第一注册请求中携带该用户设备当前所在的位置信息
时,第一ATCF直接从第一注册请求中获取该位置信息。
(1-2):第一ATCF获取该用户设备的签约信息。
归属地网络中的HSS中存储有用户设备的标识信息和签约信息的对应关系;在本步骤中,第一ATCF根据该用户设备的标识信息,从HSS中的标识信息和签约信息的对应关系中获取该用户设备的签约信息,该签约信息包括包含直接用于指示用户在某VPLMN需要使用S8HR架构进行VOLTE的指示信息,或者包含与某VPLMN之间的漫游协议,该漫游协议规定使用S8HR漫游架构。
(2):第一ATCF根据该位置信息和该签约信息,确定用户设备是否为S8HR漫游用户设备。
第一ATCF根据该位置信息获知用户设备当前的漫游地网络(VPLMN(Visted Public Land Mobile Network,拜访公共陆地移动网)),然后通过以下步骤(A)至(C)确定该用户设备是否是S8HR漫游用户设备:
A:第一ATCF通过签约信息中包括的用于指示用户设备在所述VPLMN中为S8HR漫游用户设备的指示信息,确定用户设备为S8HR漫游用户设备。
本发明实施例中,所述用户设备的签约数据中可能含有特定的用于指示所述用户设备在所述VPLMN中是否为S8HR漫游用户设备的指示信息,第一ATCF可依据该指示信息判断用户设备是否为S8HR漫游用户设备。
B:第一ATCF可通过用户设备的签约信息中针对所述VPLMN并未包含拜访地址允许指示信息,确定所述用户设备在所述VPLMN中为S8HR漫游用户设备。
通常而言,若用户设备的签约数据中含有指示信息说明拜访地网络地址允许(VPLMN Address Allowed,VAA),则该用户设备一般采用本地疏导(Local Breakout,LBO)通过本地拜访网络接入PDN,和本发明对应的是IMS APN PDN。因此,在本发明实施例中,第一ATCF可以采用判断签约信息中不含VAA指示信息来判断用户设备是S8HR漫游用户。
C:第一ATCF通过VPLMN和归属地公用陆地移动网络(Home Public Land Mobile Network,HPLMN)之间签订的S8HR漫游协议,确定用户设备为S8HR漫游用户设备。
本发明实施例中第一ATCF可以判断用户设备的HPLMN和VPLMN之间的相关漫游协议中,是否要求使用S8HR通信机制为所述用户设备提供VoLTE
业务,若要求使用S8HR通信机制为所述用户设备提供VoLTE业务,则判断所述用户设备是S8HR漫游用户。
步骤302:第一ATCF获取用户设备当前所在的位置信息,并根据该位置信息,获取用户设备当前所在的漫游地网络中的第二ATCF的标识信息。
第二ATCF的标识信息可以为第二ATCF的设备标识或者第二ATCF的地址信息等。
第一ATCF确定该用户设备是S8HR漫游用户设备时,第一ATCF可以通过以下方式获取漫游地网络中的第二ATCF的标识信息,并请求将该用户设备的媒体面和信令面锚定到该漫游地网络中的锚定设备(第二ATCF)上。
第一ATCF中存储全球网络中每个网络的位置范围和网络标识的对应关系,以及网络标识和锚定设备的标识信息的对应关系;相应的,本步骤可以为:
第一ATCF获取该用户设备当前所在的位置信息,根据该位置信息和每个网络的位置范围和网络标识的对应关系获取该用户设备当前所在的漫游地网络的网络标识,根据该漫游地网络的网络标识,从网络标识和锚定设备的标识信息的对应关系中获取该用户设备当前所在的漫游地网络中的第二ATCF的标识信息。
网络标识可以为网络编号或者网络地址信息等。第二ATCF用于S8HR漫游架构下的漫游用户的SRVCC切换。
进一步地,第一ATCF绑定该用户设备的标识信息和该第二ATCF的标识信息的对应关系,以便于后续可以直接根据该用户设备的标识信息,从用户设备的标识信息和锚定设备的标识信息的对应关系中获取该用户设备对应的第二ATCF的标识信息。
需要说明的是,第一ATCF获取该用户设备当前所在的位置信息的步骤和步骤301中的步骤(1)相同,在此不再赘述。
步骤303:第一ATCF根据第二ATCF的标识信息,向第二ATCF发送用户设备的第二注册请求,第二注册请求用于为用户设备请求注册于第二ATCF。
第二注册请求携带该用户设备的标识信息;第二注册请求用于为用户设备请求注册于第二ATCF,从而实现将第二ATCF/ATGW串入用户设备的注册信令路径。
步骤304:第二ATCF接收第一ATCF发送的第二注册请求,并根据第二注
册请求,生成用户设备当前会话的会话转换标识,向第一ATCF发送第二注册响应,该第二注册响应携带该会话转换标识。
该会话转换标识用于在漫游地网络中标识第二ATCF。该会话标识可以为STN-SR(Session Transfer Number for SRVCC,用于SRVCC的会话转换号码),该STN-SR用于在SRVCC过程中MSC能根据该会话标识寻址第二ATCF。
该第二注册响应除了携带该会话转换标识之外,还可以携带该用户的用户标识。
步骤305:第一ATCF接收第二ATCF发送第二注册响应,并向归属地网络中的I/S-CSCF(Interrogating/serving-call session control function,查询/服务呼叫会话控制)发送第三注册请求,第三注册请求携带该会话转换标识。
第三注册请求用于为用户设备请求注册于I/S-CSCF,后续通过以下步骤306-309,该会话转换标识被传送至归属地网络中的HSS,替换掉原HSS中签约的会话转换标识后,并随同其他签约数据一起被插入漫游地网络中的MME(mobility management entity,移动性管理实体)中。在SRVCC切换时,MME将该会话转换标识转发给MSC,MSC根据该会话转换标识向第二ATCF触发SRVCC接入转换请求。
步骤306:I/S CSCF接收第一ATCF发送的第三注册请求,并向归属地网络中的SCC AS发送第四注册请求,该第四注册请求携带该该会话转换标识。
该第四注册请求中除了携带该会话转换标识以外,还可以携带该用户设备的标识信息。
I/S CSCF接收第一ATCF发送的第三注册请求时,向第一ATCF发送第三注册请求对应的第三注册响应,该第三注册响应用于指示I/S CSCF已成功接收第一ATCF发送的第三注册请求。
步骤307:SCC AS接收I/S CSCF发送的第四注册请求,并向归属地网络中的HSS发送数据更新请求,该数据更新请求携带该该会话转换标识。
具体地,SCC AS接收I/S CSCF发送的第四注册请求,从该第四注册请求中获取该会话转换标识;向HSS发送sh-pull,HSS接收SCC AS发送的sh-pull,并向SCC AS发送sh-pull-resp,该sh-pull-resp携带用户设备SRVCC capability;SCC AS接收HSS发送的sh-pull-resp,并向HSS发送数据更新请求,该数据更新请求携带该会话转换标识,该数据更新请求还可以携带该用户设备的标识信
息。
进一步地,SCC AS向I/S CSCF发送第四注册请求对应的第四注册响应,第四注册响应用于指示SCC AS已成功接收I/S CSCF发送的第四注册请求。
步骤308:HSS接收SCC AS发送的数据更新请求,并向漫游地网络中的MME发送插入签约数据请求,该插入签约数据请求携带该会话转换标识。
HSS接收SCC AS发送的数据更新请求时,向SCC AS发送数据更新请求对应的数据更新响应,数据更新响应用于指示HSS已成功接收SCC AS发送的数据更新请求。
HSS接收SCC AS发送的数据更新请求,并从该数据更新请求中获取该会话转换标识和该用户设备的标识信息,根据该用户设备的标识信息,获取该用户设备的签约信息,将该用户设备的签约信息中的会话转换标识修改为该会话转换标识。
该插入签约数据请求中还可以携带该用户设备的标识信息和该用户设备的签约信息。
步骤309:MME接收HSS发送的插入签约数据请求,并存储该会话交换标识。
MME接收HSS发送的插入签约数据请求时,向HSS发送插入签约数据请求对应的插入签约数据响应,插入签约数据响应用于指示MME已成功接收HSS发送的签约数据。
该MME从该插入签约数据请求中获取该用户设备的标识信息,该会话转换标识和该用户设备的签约信息,存储该用户设备的标识信息,该会话转换标识和该用户设备的签约信息。
需要说明的是,步骤301-步骤309为用户设备的注册流程,当用户设备漫游至漫游地网络中时,只需要执行一次步骤301-步骤309;后续当用户需要进行呼叫流程时,执行步骤401-404或者501-504。
在本发明实施例中,第一锚定设备判断用户设备是S8HR漫游用户设备并判断用户设备当前所在的位置,根据用户设备当前所在的位置,选择用户设备当前所在的漫游地网络中的第二锚定设备,并将第二锚定设备串入注册路径,从而后续在发生SRVCC切换时,能够缩短中断时延,提高用户体验。
参见图7,本发明实施例提供了一种S8HR漫游架构下的SRVCC切换方法,该方法是S8HR漫游架构下用户设备主动呼叫对端设备的方法流程,该方法应用在第一ATCF和第二ATCF之间,该方法包括:
步骤401:第一ATCF接收该用户设备发送的第一呼叫请求,并为该VoLTE呼叫分配第一用户面资源信息,并向第二ATCF发送第二呼叫请求,该第二呼叫请求携带第一用户面资源信息。
当该用户设备在漫游地网络中发起VoLTE呼叫流程时,用户设备向第一ATCF发送第一呼叫请求,该第一呼叫请求用于请求建立VoLTE呼叫,该第一呼叫请求携带该用户设备的标识信息和被叫的对端设备的标识信息。
第一ATCF接收该用户设备发送的第一呼叫请求,并从该第一呼叫请求中获取该用户设备的标识信息和该对端设备的标识信息,并为该用户设备分配第一用户面资源信息,该第一用户面资源信息可以为归属地网络中的第一ATGW的地址信息,获取第二ATCF的标识信息,根据第二ATCF的标识信息向第二ATCF发送第二呼叫请求,该第二呼叫请求用于请求建立VoLTE呼叫,且该第二呼叫请求除了携带该第一用户面资源信息以外,还可以携带该用户设备的标识信息和该对端设备的标识信息。
第一ATCF获取第二ATCF的标识信息的步骤可以为:
第一ATCF获取该用户设备当前所在的位置信息,并根据该位置信息,获取用户设备当前所在的漫游地网络中的第二ATCF的标识信息。或者,
在注册流程时,第一ATCF中存储用户设备的标识信息和锚定设备的标识信息的对应关系,则第一ATCF根据该用户设备的标识信息,从用户设备的标识信息和锚定设备的标识信息的对应关系获取该用户设备对应的第二ATCF的标识信息。
步骤402:第二ATCF接收第一ATCF发送的第二呼叫请求,并为该VoLTE呼叫分配第二用户面资源信息,向第一ATCF发送第二呼叫响应,该第二呼叫响应携带第二用户面资源信息。
第二ATCF接收第一ATCF发送的第二呼叫请求,并从第二呼叫请求中获取第一用户面资源信息、该用户设备的标识信息和该对端设备的标识信息,并为该VoLTE分配第二用户面资源信息,第二用户面资源信息可以为漫游地网络中的第二ATGW的地址信息,向第一ATCF发送第二呼叫响应,该第二呼叫响应
携带第二用户面资源信息、该用户设备的标识信息和该对端设备的标识信息。
第一用户面资源信息和第二用户面资源信息用于在第一ATCF和第二ATCF之间为该VoLTE呼叫建立用户面路径。相应的,第二ATCF根据第一用户面资源信息和第二用户面资源信息,为该VoLTE呼叫建立用户面路径,该用户面路径用于传输该VoLTE呼叫的媒体数据。
其中,第一用户面资源信息可以为第一ATGW的地址信息,第二用户面资源可以为第二ATGW地址信息,则第二ATCF根据第一用户面资源信息和第二用户面资源信息,为该VoLTE呼叫建立用户面路径的步骤可以为:
第二ATCF根据第二ATGW的地址,向第二ATGW发送第一建立请求,第一建立请求携带该第一ATGW的地址、该用户设备的标识信息和该对端设备的标识信息,以请求第二ATGW为VoLTE呼叫建立用户面路径。第二ATGW接收第二ATCF发送的第一建立请求,并根据第一ATGW的地址,与第一ATGW建立用户面路径,该用户面路径用于该用户设备与该对端设备进行通话。
步骤403:第一ATCF接收第二ATCF发送的第二呼叫响应,并根据第一用户面资源信息和第二用户面资源信息为该VoLTE呼叫建立用户面路径。
第一ATCF接收第二ATCF发送的第二呼叫响应,从该第二呼叫响应中获取该第二用户面资源信息、该用户设备的标识信息和该对端设备的标识信息,并根据第一用户面资源信息和第二用户面资源信息为该VoLTE呼叫建立用户面路径。
其中,第一ATCF根据第一用户面资源信息和第二用户面资源信息为该VoLTE呼叫建立用户面路径的步骤可以为:
第一ATCF根据第一ATGW的地址,向第一ATGW发送第二建立请求,该第二建立请求携带该第二ATGW的地址、该用户设备的标识信息和该对端设备的标识信息,以请求第一ATGW为该VoLTE呼叫建立用户面路径。第一ATGW接收第一ATCF发送的第二建立请求,并根据第二ATGW的地址,与第二ATGW建立用户面路径,该用户面路径用于该用户设备与该对端设备进行通话。
步骤404:第一ATCF根据该对端设备的标识信息,向该对端设备发送该第一用户面资源信息。
第一ATCF根据该对端设备的标识信息,向该对端设备发送该第一ATGW的地址,该对端设备接收第一ATCF发送的该第一ATGW的地址,并将该第一
ATGW的地址作为呼叫该用户设备的主机地址。
本步骤可以通过以下步骤(1)至(4)实现,包括:
(1):第一ATCF向归属地网络中的I/S CSCF发送第三呼叫请求,该第三呼叫请求携带该第一用户面资源信息。
该第三呼叫请求还可以携带该用户设备的标识信息和该对端设备的标识信息。
(2):I/S CSCF接收第一ATCF发送的第三呼叫请求,并向归属地网络中的SCC AS发送第四呼叫请求,该第四呼叫请求携带该第一用户面资源信息。
该第四呼叫请求还可以携带该用户设备的标识信息和该对端设备的标识信息。
(3):SCC AS接收I/S CSCF发送的第四呼叫请求,并向I/S CSCF发送第四呼叫请求对应的第四呼叫响应。
(4):I/S CSCF接收SCC AS发送的第四呼叫响应,并根据该对端设备的标识信息,向对端设备发送第五呼叫请求,该第五呼叫请求携带该第一用户面资源信息。
该对端设备接收I/S CSCF发送的第五呼叫请求,并从该第五呼叫请求中获取该第一用户面资源信息,将该第一用户面资源信息中的第一ATGW的地址作为呼叫该用户设备的主机地址。
需要说明的是,为缩短用户面路径减少数据传输时延,对VoLTE呼叫流程还可以加以优化,优化后的信令和媒体面路径如图8所示;则在步骤404中,第一ATCF还可以不向该对端设备发送该第一用户面资源信息,而是向该对端设备发送该第二用户面资源信息,具体过程可以为:
第一ATCF根据该对端设备的标识信息,向该对端设备发送该第二ATGW的地址,该对端设备接收第一ATCF发送的该第二ATGW的地址,并将该第二ATGW的地址作为呼叫该用户设备的主机地址。
由于该用户设备将该第二ATGW的地址作为呼叫该对端设备的主机地址,从而缩短了用户面路径,减少了数据传输时延。
在本发明实施例中,VoLTE呼叫流程中第一锚定设备将第二锚定设备串入呼叫信令面和媒体面路径,从而在发生SRVCC切换时,仅切换用户设备至第二锚定设备的接入腿和媒体面,第二锚定设备与远端用户设备的远端腿和媒体面
不发生改变,这样可以缩短SRVCC切换过程的信令和媒体面切换距离,从而大大缩短中断时延,提高用户体验。
参见图9,本发明实施例提供了一种S8HR漫游架构下的SRVCC切换方法,该方法是S8HR漫游架构下用户设备被对端设备呼叫的方法流程,该方法应用在第一ATCF和第二ATCF之间,该方法包括:
步骤501:该用户设备所在的归属地网络的第一ATCF接收该对端设备发送的第一呼叫请求,并为该VoLTE呼叫分配第一用户面资源信息,并向第二ATCF发送第二呼叫请求,该第二呼叫请求携带第一用户面资源信息。
当该对端设备发起VoLTE呼叫流程时,第一ATCF接收了对端设备发送第一呼叫请求,第一呼叫请求用于请求建立VoLTE呼叫,该第一呼叫请求携带该对端设备的标识信息和被叫的用户设备的标识信息。
第一ATCF接收该对端设备发送的第一呼叫请求,并从该第一呼叫请求中获取该用户设备的标识信息和该对端设备的标识信息,并为该VoLTE呼叫分配第一用户面资源信息,该第一用户面资源信息可以为归属地网络中的第一ATGW的地址信息,第一ATCF获取第二ATCF的标识信息,根据第二ATCF的标识信息向第二ATCF发送第二呼叫请求,该第二呼叫请求除了携带该第一用户面资源信息以外,还可以携带该用户设备的标识信息和该对端设备的标识信息。
步骤502:第二ATCF接收第一ATCF发送的第二呼叫请求,并为该VoLTE呼叫分配第二用户面资源信息,向第一ATCF发送第二呼叫响应,该第二呼叫响应携带第二用户面资源信息。
第二ATCF接收第一ATCF发送的第二呼叫请求,并从第二呼叫请求中获取第一用户面资源信息、该用户设备的标识信息和该对端设备的标识信息,并为该VoLTE呼叫分配第二用户面资源信息,第二用户面资源信息可以为漫游地网络中的第二ATGW的地址信息,向第一ATCF发送第二呼叫响应,该第二呼叫响应携带第二用户面资源信息、该用户设备的标识信息和该对端设备的标识信息。
第一用户面资源信息和第二用户面资源信息用于在第一ATCF和第二ATCF之间为该VoLTE呼叫建立用户面路径,相应的,第二ATCF根据第一用户面资
源信息和第二用户面资源信息,为该VoLTE呼叫建立用户面路径,该用户面路径用于传输该VoLTE呼叫的媒体数据。
其中,第一用户面资源信息可以为第一ATGW的地址,第二用户面资源信息可以为第二ATGW的地址,则第二ATCF根据第一用户面资源信息和第二用户面资源信息,为该VoLTE呼叫建立用户面路径的步骤可以为:
第二ATCF根据第二ATGW的地址,向第二ATGW发送第一建立请求,第一建立请求携带该第一ATGW的地址、该用户设备的标识信息和该对端设备的标识信息,以请求第二ATGW为该VoLTE呼叫建立用户面路径。第二ATGW接收第二ATCF发送的第一建立请求,并根据第一ATGW的地址,与第一ATGW建立用户面路径,该用户面路径用于该用户设备与该对端设备进行通话。
步骤503:第一ATCF接收第二ATCF发送的第二呼叫响应,并根据第一用户面资源信息和第二用户面资源信息为该VoLTE呼叫建立用户面路径。
第一ATCF接收第二ATCF发送的第二呼叫响应,从该第二呼叫响应中获取该第二用户面资源信息、该用户设备的标识信息和该对端设备的标识信息,并根据第一用户面资源信息和第二用户面资源信息为该VoLTE呼叫建立用户面路径。
其中,第一ATCF根据第一用户面资源信息和第二用户面资源信息为该VoLTE呼叫建立用户面路径的步骤可以为:
第一ATCF根据第一ATGW的地址,向第一ATGW发送第二建立请求,该第二建立请求携带该第二ATGW的地址、该用户设备的标识信息和该对端设备的标识信息,以请求第一ATGW为该VoLTE呼叫建立用户面路径。第一ATGW接收第一ATCF发送的第二建立请求,并根据第二ATGW的地址,与第二ATGW建立用户面路径,该用户面路径用于该用户设备与该对端设备进行通话。
步骤504:第一ATCF根据该用户设备的标识信息,向该用户设备发送第三呼叫请求,该第三呼叫请求中携带该第一用户面资源。
第一ATCF根据该用户设备的标识信息,向该用户设备发送该第一ATGW的地址,该用户设备接收第一ATCF发送的该第一ATGW的地址,并将该第一ATGW的地址作为呼叫该对端设备的主机地址。
需要说明的是,在步骤504中,为缩短用户面路径减少数据传输时延,对VoLTE呼叫流程还可以加以优化,第一ATCF还可以不向该用户设备发送该第
一用户面资源,而是向该用户设备发送该第二用户面资源,具体过程可以为:
第一ATCF根据该用户设备的标识信息,向该用户设备发送该第二ATGW的地址,该用户设备接收第一ATCF发送的该第二ATGW的地址,并将该第二ATGW的地址作为呼叫该对端设备的主机地址。
由于该用户设备将该第二ATGW的地址作为呼叫该对端设备的主机地址,从而缩短了用户面路径,减少了数据传输时延。
在本发明实施例中,VoLTE呼叫流程中第一锚定设备将第二锚定设备串入呼叫信令面和媒体面路径,从而在发生SRVCC切换时,仅切换用户设备至第二锚定设备的接入腿和媒体面,第二锚定设备与远端用户设备的远端腿和媒体面不发生改变,这样可以缩短SRVCC切换过程的信令和媒体面切换距离,从而大大缩短中断时延,提高用户体验。
参见图10,本发明实施例提供了一种S8HR漫游架构下的SRVCC切换方法,该方法是用户设备发生SRVCC切换的方法流程,该方法应用在漫游地网络中的MSC、第一ATCF和第二ATCF之间,该方法包括:
步骤601:MSC接收MME发送的SRVCC切换请求,该SRVCC切换请求携带第二ATCF生成的会话转换标识,并根据该会话转换标识,向第二ATCF发送会话转换请求。
当用户设备因移出LTE网络覆盖区无法继续VoLTE会话而触发SRVCC切换流程时,也即在该VoLTE呼叫发生SRVCC切换时,MME向MSC发送SRVCC切换请求,该SRVCC切换请求携带第二ATCF在用户设备的IMS注册过程中生成的会话转换标识。
MSC接收MME发送的SRVCC切换请求,并从该SRVCC切换请求中获取第二ATCF生成的会话转换标识,根据该会话转换标识寻址到第二ATCF,向第二ATCF发送会话转换请求,该会话转换请求携带该会话转换标识和用户设备当前会话的会话标识以及对应媒体面MGW的地址信息。
会话标识用于标识用户设备,并和该用户设备当前的会话进行关联。
由于MSC和第二ATCF处于同一个网络中且MSC和第二ATCF之间的距离较近,因此,MSC向该第二ATCF发送会话转换请求的路径较短,缩短了SRVCC切换时延。
步骤602:第二ATCF接收MSC发送的会话转换请求,并根据该会话转换标识和该会话标识以及MGW的地址信息,将该当前会话至本端用户设备媒体面路径从PS接入腿更新为CS接入腿,当前会话至对端用户设备的媒体面路径保持不变。
第二ATCF根据该会话转换标识和该会话标识以及MGW的地址信息,将该当前会话至本端用户设备的媒体面路径从PS接入腿更新为CS接入腿可以通过以下步骤(1)至(3)实现,包括:
(1):第二ATCF根据该会话转换标识,确定该用户设备要进行SRVCC切换方法;
(2):第二ATCF根据该会话标识,确定该用户设备的当前会话。
(3):第二ATCF将当前会话至本端用户设备的媒体面路径信息从PS接入腿更新为CS接入腿。
具体过程可以为:
第二ATCF向第二ATGW发送配置请求,该配置请求携带该会话标识和MGW的地址信息;第二ATGW接收第二ATCF发送的配置请求,根据该会话标识确定该用户设备的当前会话,并根据MGW地址信息将该当前会话的第二ATGW至本端用户设备的媒体面路径信息从PS接入退更新为CS接入退。
第二ATGW向第二ATCF发送配置响应,该配置响应用于指示第二ATGW已成功对用户设备的当前媒体面进行切换。
进一步地,第二ATCF接收第二ATGW发送的配置响应,并向MSC发送会话转换响应,该会话转换响应中携带第二ATGW的地址信息,MSC将该第二ATGW的地址信息发送给对应的MGW,以便在MGW和第二ATGW之间建立媒体面路径。
步骤603:第二ATCF向第一ATCF发送第一接入转换更新请求。
步骤604:第一ATCF接收第二ATCF发送的第一接入转换更新请求,并根据第一接入转换更新请求向AS或S-CSCF发送第二接入转换更新请求。
第一接入转换更新请求和第二接入转换更新请求用于在第二ATCF与AS或在第二ATCF与S-CSCF之间建立一个新的会话并使得AS或S-CSCF关联该新的会话与远端会话。
步骤605:AS或S-CSCF接收第一ATCF发送的第二接入转换更新请求,
建立一个新的会话,并关联该新的会话与远端会话。
进一步地,AS或S-CSCF向第一ATCF发送第二接入转换更新响应,第二接入更新响应用于指示AS或S-CSCF已成功对用户设备的当前会话进行切换。
进一步地,第一ATCF向第二ATCF发送第一接入转换更新响应,第一接入转换更新响应用于指示AS或S-CSCF已成功对用户设备的当前会话进行切换。
在本发明实施例中,将VoLTE会话的信令面和媒体面锚点到漫游地网络中的第二锚定设备上,从而使得第二锚定设备靠近漫游地网络中的MSC,实现SRVCC切换过程中本端用户与漫游地网络中的第二锚定设备之间快速完成会话切换以及媒体面重协商过程,且对端用户设备和第一锚定设备等不参与媒体面重协商过程,从而缩短了切换过程中媒体面中断时延。
实施例2
本发明实施例提供了一种S8HR漫游架构下的SRVCC切换方法的应用场景,参见图11,在应用本场景中,并未在漫游地网络中新增第二锚定设备(如第二ATCF/第二ATGW)作为SRVCC切换前后信令和媒体面的锚点,而是直接将信令和媒体面锚定到漫游地网络中的MSC上,该MSC将要负责控制用户设备进行SRVCC切换的MSC,并且,该MSC的地址信息可以不提前配置在归属地网络中的第一锚定设备中(第一ATCF/第一ATGW)。
在本发明实施例中,当用户设备在漫游地网络中发起IMS注册过程时,第一锚定设备生成会话转换标识,该会话转换标识是一个全局唯一性标识的会话转换标识,即使在漫游情况下也可以被漫游地网络中的MSC用来寻址第一锚定设备。
在注册过程中,漫游地网络中的MME从HSS获取用户设备的签约数据后,该签约数据包括该会话转换标识,选择一个与自身存在Sv接口的能执行SRVCC功能的MSC,并将会话转换标识转发给MSC,MSC根据该会话转换标识寻址到第一锚定设备,并提前连续第一锚定设备,以使第一锚定设备在用户设备发起VoLTE呼叫流程之前(例如在IMS注册过程中)就可以提前获知SRVCC MSC的地址信息,从而方便后续用户设备发起VoLTE呼叫时能将信令和用户面信息发送给MSC,实现本地锚定的作用。
当用户设备发起VoLTE呼叫流程时(包括用户设备作为主叫或作为被叫),
漫游地网络中的MSC将被串入呼叫的信令路径和用户面路径,如图12,从而MSC将会成为漫游地网络中的一个锚点。
当用户设备因移出LTE覆盖区进入2G/3G网络覆盖区而触发SRVCC切换流程时,MSC只需要触发目标网络准备CS无线侧资源,并完成用户设备至MSC的接入腿从PS域切换为CS域,无需更改MSC至远端的远端腿,见图11。本SRVCC过程中,因避免了国际漫游情况下的远端腿的更改,从而大大减少了SRVCC切换时延,从而使得会话中断时延不至于太高而使用户明显感知,提高了用户体验。
参见图13,图13是本发明实施例提供的一种S8HR漫游架构下的SRVCC切换装置结构框图,该装置应用在用户设备对应的漫游地网络中的第一锚定设备中,并且S8HR漫游架构下的SRVCC切换装置可因配置或性能不同而产生比较大的差异,可以包括一个或一个以上第三接收器901和第三发射器902。
第三接收器901,用于接收第一呼叫请求,第一呼叫请求用于请求建立基于长期演进的语音VoLTE呼叫,并为VoLTE呼叫分配第一用户面资源信息;
第三发射器902,用于向用户设备当前所在的漫游地网络中的移动交换中心MSC发送第二呼叫请求,第二呼叫请求携带第一用户面资源信息;
第三接收器901,还用于接收MSC发送的第二呼叫响应,第二呼叫响应携带MSC为VoLTE呼叫分配的第二用户面资源信息,第一用户面资源信息和第二用户面资源信息用于在MSC和第一锚定设备之间为VoLTE呼叫建立用户面路径,用户面路径用于传输VoLTE呼叫的媒体数据;
第三接收器901,还用于在VoLTE呼叫发生单一无线语音通话连续性SRVCC切换时,接收MSC发送的会话转换请求,会话转换请求是MSC在接收移动性管理网元MME发送的SRVCC切换请求之后向第一锚定设备发送的;
第三发射器902,还用于根据会话转换请求,向应用服务器AS或服务呼叫会话控制功能S-CSCF发送接入转换更新请求,接入转换更新请求用于在MSC与AS或S-CSCF之间建立一个新的会话并使得AS或S-CSCF关联新的会话与远端会话。
可选的,S8HR漫游架构下的SRVCC切换装置除了包括上述第三接收器901和第三发射器902外,还包括:第三处理器903;该装置还可以包括其他部件。
例如,还可以包括第三存储器904,一个或一个以上存储第三应用程序905或第三数据906的第三存储介质907(例如一个或一个以上海量存储设备)。其中,第三存储器904和第三存储介质907可以是短暂存储或持久存储。存储在第三存储介质907的程序可以包括一个或一个以上模块(图示没标出),每个模块可以包括S8HR漫游架构下的SRVCC切换的装置中的一系列指令操作。更进一步地,第三处理器902可以设置为与第三存储介质907通信,在S8HR漫游架构下的SRVCC切换的装置上执行第三存储介质907中的一系列指令操作。
可选的,S8HR漫游架构下的SRVCC切换的装置还可以包括一个或一个以上第三电源908,一个或一个以上第三有线或无线网络接口909,一个或一个以上第三输入输出接口910,一个或一个以上第三键盘911,和/或,一个或一个以上第三操作系统912,例如Windows ServerTM,Mac OS XTM,UnixTM,LinuxTM,FreeBSDTM等等。
在本发明中S8HR漫游架构下的SRVCC切换的装置包括的第三接收器901、第三发射器902和第三处理器903还可以具有以下功能:
第三接收器901,还用于接收用户设备发送的第一注册请求;
第三处理器903,用于根据第一注册请求确定用户设备为S8HR漫游用户设备;
第三处理器903,还用于根据第一注册请求,生成用于SRVCC切换的会话转换标识,会话转换标识是个全局性唯一标识;
第三发射器902,还用于向查询/服务呼叫会话控制功能设备I/S-CSCF发送第二注册请求,第二注册请求中携带会话转换标识,第二注册请求用于为用户设备请求注册于I/S-CSCF,以使I/S-CSCF将会话转换标识发送给MSC,以使MSC根据会话转换标识向第一锚定设备发送MSC的地址信息。
可选的,S8HR漫游用户设备为漫游入漫游地网络,且需要采用基于S8接口的归属路由HR通信机制进行VoLTE的用户设备。
可选的,会话转换标识用于标识第一锚定设备,以便在SRVCC切换过程中MSC能根据会话转换标识定位第一锚定设备。
可选的,第三处理器903,还用于获取用户设备当前所在的位置信息,以及用户设备的签约信息;根据位置信息和签约信息,确定用户设备为S8HR漫游用户设备。
可选的,第一锚定设备包括第一接入转换转发控制功能设备ATCF。
在本发明实施例中,将漫游地网络中的MSC作为信令和媒体面锚点,在发生SRVCC切换时,MSC不需要改变到远端的媒体路径,这样可以缩短SRVCC切换过程的信令和媒体面切换距离,从而大大缩短中断时延,提高用户体验。
参见图14,图14是本发明实施例提供的一种S8HR漫游架构下的SRVCC切换装置结构框图,该装置应用在用户设备对应的漫游地网络中的移动交换中心MSC中,并且S8HR漫游架构下的SRVCC切换装置可因配置或性能不同而产生比较大的差异,可以包括一个或一个以上第四接收器1001和第四发射器1002。
第四接收器1001,用于接收用户设备对应的归属地网络中的第一锚定设备发送的第二呼叫请求,第二呼叫请求用于请求建立基于长期演进的语音VoLTE呼叫,且第二呼叫请求携带第一锚定设备为VoLTE呼叫分配的第一用户面资源信息;
第四发射器1002,用于为VoLTE呼叫分配第二用户面资源信息,并向第一锚定设备发送第二呼叫响应,第二呼叫响应携带第二用户面资源信息,第一用户面资源信息和第二用户面资源信息用于在第一锚定设备和MSC之间为VoLTE呼叫建立用户面路径,用户面路径用于传输VoLTE呼叫的媒体数据;
第四接收器1001,还用于在VoLTE呼叫发生单一无线语音通话连续性SRVCC切换时,接收移动性管理网元MME发送的SRVCC切换请求;
第四发射器1002,还用于根据SRVCC切换请求向第一锚定设备发送会话转换请求,会话转换请求用于请求第一锚定设备向应用服务器AS或服务呼叫会话控制功能S-CSCF发送接入转换更新请求,接入转换更新请求用于在MSC与AS或S-CSCF之间建立一个新的会话并使得AS或S-CSCF关联新的会话与远端会话。
可选的,S8HR漫游架构下的SRVCC切换装置除了包括上述第四接收器101和第四发射器102外,该装置还可以包括其他部件。例如,还可以包括第四存储器1003,一个或一个以上存储第四应用程序1004或第四数据1005的第四存储介质1006(例如一个或一个以上海量存储设备)。其中,第四存储器1003和第四存储介质1006可以是短暂存储或持久存储。存储在第四存储介质1006的
程序可以包括一个或一个以上模块(图示没标出),每个模块可以包括S8HR漫游架构下的SRVCC切换的装置中的一系列指令操作。更进一步地,第四处理器102可以设置为与第四存储介质1006通信,在S8HR漫游架构下的SRVCC切换的装置上执行第四存储介质1006中的一系列指令操作。
可选的,S8HR漫游架构下的SRVCC切换的装置还可以包括一个或一个以上第四电源1007,一个或一个以上第四有线或无线网络接口1008,一个或一个以上第四输入输出接口1009,一个或一个以上第四键盘1010,和/或,一个或一个以上第四操作系统1011,例如Windows ServerTM,Mac OS XTM,UnixTM,LinuxTM,FreeBSDTM等等。
在本发明中S8HR漫游架构下的SRVCC切换的装置包括的第四接收器1001、第四发射器1002还可以具有以下功能:
第四接收器1001,还用于接收MME发送的用户设备的第三注册请求,第三注册请求中携带第一锚定设备生成的会话转换标识;
第四发射器1002,还用于根据会话转换标识向第一锚定设备发送第四注册请求,第四注册请求中携带MSC的地址信息。
在本发明实施例中,将漫游地网络中的MSC作为信令和媒体面锚点,在发生SRVCC切换时,MSC不需要改变到远端的媒体路径,这样可以缩短SRVCC切换过程的信令和媒体面切换距离,从而大大缩短中断时延,提高用户体验。
本发明实施例提供了一种S8HR漫游架构下的SRVCC切换方法,在本发明实施例中并未在漫游地网络中新增锚定设备(如ATCF/ATGW)作为SRVCC切换前后信令和媒体面的锚点,而是直接将信令和媒体面锚定到漫游地网络中的MSC上,该MSC是将要负责控制UE进行SRVCC切换的MSC,并且,MSC的地址可以不提前配置在归属地网络中的ATCF/ATGW功能实体中。
参见图15,该方法应用在归属地网络中的第一ATCF和漫游地网络中的MSC之间,该方法包括:
步骤1101:第一ATCF接收用户设备发送的第一注册请求,并根据第一注册请求确定用户设备为S8HR漫游用户设备。
S8HR漫游用户设备为漫游入漫游地网络,且需要采用基于S8接口的归属路由HR通信机制进行VoLTE的用户设备。
其中,第一ATCF根据第一注册请求确定用户设备为S8HR漫游用户设备的步骤同步骤301相同,在此不再赘述。
步骤1102:第一ATCF根据第一注册请求,生成用于SRVCC切换的会话转换标识,该会话转换标识是个全局性唯一标识。
该会话转换标识用于标识第一ATCF,以便在SRVCC切换过程中漫游地网络中的MSC能根据该会话转换标识定位归属地网络中的第一ATCF。
由于MSC和第一ATCF位于不同的网络,因此,该会话转换标识需要是全球唯一的号码,也即该会话转换标识是global STN-SR,该global STN-SR可以包括国家标识和STN-SR,国家标识可以为国家码或PLMN(Public Land Mobile Network,公共陆地移动网络)ID(identification,标识)等。
在本发明实施例中,由于第一锚定设备生成的会话转换标识为全局性唯一标识的会话转换标识,因此,漫游地网络中的MSC可以根据该会话转换标识寻址到第一锚定设备,解决了现有的漫游地网络中的MSC无法通过第一锚定设备生成的会话标识定位第一锚定设备的问题。
步骤1103:第一ATCF向归属地网络中的I/S-CSCF发送第二注册请求,第二注册请求中携带该会话转换标识。
第二注册请求用于为用户设备请求注册于I/S-CSCF,以使I/S-CSCF将该会话转换标识发送给漫游地网络中的MSC,以使MSC根据该会话转换标识向第一ATCF发送该MSC的地址信息。
步骤1104:I/S-CSCF接收第一ATCF发送的第二注册请求,并将该会话转换标识插入漫游地网络中的MME。
本步骤可以通过以下步骤(1)至(4)实现,包括:
(1):I/S-CSCF向归属地网络中的SCC AS发送第五注册请求,该第五注册请求携带该会话转换标识。
(2):SCC AS接收I/S-CSCF发送的第五注册请求,并向归属地网络中的HSS发送数据更新请求,该数据更新请求携带该会话转换标识。
(3):HSS接收SCC AS发送的数据更新请求,并向漫游地网络中的MME发送插入签约数据请求,该插入签约数据请求携带该会话转换标识。
该数据更新请求中除了携带该会话转换标识,还可以携带该用户设备的标识信息,相应的,HSS接收SCC AS发送的数据更新请求,并从该数据更新请
求中获取该会话转换标识和该用户设备的标识信息,根据该用户设备的标识信息,获取该用户设备的签约信息,将该用户设备的签约信息中的会话转换标识修改为该会话转换标识。
该插入签约数据请求中还可以携带该用户设备的标识信息和该用户设备的签约信息。
(4):MME接收HSS发送的插入签约数据请求,并存储该会话交换标识。
MME接收HSS发送的插入签约数据请求时,向HSS发送插入签约数据请求对应的插入签约数据响应,插入签约数据响应用于指示MME已成功接收HSS发送的签约数据。
该MME从该插入签约数据请求中获取该用户设备的标识信息,该会话转换标识和该用户设备的签约信息,存储该用户设备的标识信息,该会话转换标识和该用户设备的签约信息。
步骤1105:MME向MSC发送第三注册请求,该第三注册请求携带第一ATCF生成的该会话转换标识。
MME接收到该会话转换标识之后,选择一个与自身含有Sv接口的MSC,然后向该MSC发送第三注册请求。
步骤1106:MSC接收MME发送的该用户设备的第三注册请求,根据该会话转换标识向第一ATCF发送第四注册请求,该第四注册请求中携带该MSC的地址信息。
步骤1107:第一ATCF接收MSC发送的第四注册请求,并存储该MSC的地址信息。
在本发明实施例中,第一锚定设备需要判断用户设备是S8HR用户设备,对S8HR用户设备生成全局性唯一标识的会话转换标识,将该会话转换标识传输给MSC,MSC根据该会话转换标识联系第一锚定设备,从而使得第一锚定设备获取该MSC的地址信息。
参见图16,本发明实施例提供了一种S8HR漫游架构下的SRVCC切换方法,该方法是S8HR漫游架构下用户设备主动呼叫对端设备的方法流程,该方法应用在第一ATCF和MSC之间,该方法包括:
步骤1201:第一ATCF接收该用户设备发送的第一呼叫请求,并为该VoLTE
呼叫分配第一用户面资源信息,并向该MSC发送第二呼叫请求,该第二呼叫请求携带第一用户面资源信息。
当该用户设备在漫游地网络中发起VoLTE呼叫流程时,用户设备向第一ATCF发送第一呼叫请求,该第一呼叫请求用于请求建立VoLTE呼叫,该第一呼叫请求携带该用户设备的标识信息和被叫的对端设备的标识信息。
第一ATCF接收该用户设备发送的第一呼叫请求,并从该第一呼叫请求中获取该用户设备的标识信息和该对端设备的标识信息,并为该用户设备分配第一用户面资源信息,该第一用户面资源信息可以为归属地网络中的第一ATGW的地址信息,获取已存储的MSC的地址信息,根据该MSC的地址信息,向MSC发送第二呼叫请求,该第二呼叫请求用于请求建立VoLTE呼叫,且该第二呼叫请求除了携带该第一用户面资源信息以外,还可以携带该用户设备的标识信息和该对端设备的标识信息。
步骤1202:MSC接收第一ATCF发送的第二呼叫请求,并为该VoLTE呼叫分配第二用户面资源信息,并向第一ATCF发送第二呼叫响应,该第二呼叫响应携带第二用户面资源信息。
MSC接收第一ATCF发送的第二呼叫请求,并从第二呼叫请求中获取第一用户面资源信息、该用户设备的标识信息和该对端设备的标识信息,并为该VoLTE分配第二用户面资源信息,第二用户面资源信息可以为漫游地网络中的MGW(Media Gateway,媒体网关)的地址信息,向第一ATCF发送第二呼叫响应,该第二呼叫响应携带第二用户面资源信息、该用户设备的标识信息和该对端设备的标识信息。
第一用户面资源信息和第二用户面资源信息用于在MSC和第一ATCF之间为该VoLTE呼叫建立用户面路径。相应的,MSC根据第一用户面资源信息和第二用户面资源信息,为该VoLTE呼叫建立用户面路径,该用户面路径用于传输该VoLTE呼叫的媒体数据。
其中,第一用户面资源信息可以为第一ATGW的地址信息,第二用户面资源可以为MGW地址信息,则MSC根据第一用户面资源信息和第二用户面资源信息,为该VoLTE呼叫建立用户面路径的步骤可以为:
MSC根据MGW的地址,向MGW发送第一建立请求,第一建立请求携带该第一ATGW的地址、该用户设备的标识信息和该对端设备的标识信息,以请
求MGW为VoLTE呼叫建立用户面路径。MGW接收第二ATCF发送的第一建立请求,并根据第一ATGW的地址,与第一ATGW建立用户面路径,该用户面路径用于该用户设备与该对端设备进行通话。
步骤1203:第一ATCF接收MSC发送的第二呼叫响应,并根据第一用户面资源信息和第二用户面资源信息为该VoLTE呼叫建立用户面路径。
本步骤和步骤403相同,在此不再赘述。
步骤1204:第一ATCF根据该对端设备的标识信息,向该对端设备发送该第一用户面资源信息。
第一ATCF根据该对端设备的标识信息,向该对端设备发送该第一ATGW的地址,该对端设备接收第一ATCF发送的该第一ATGW的地址,并将该第一ATGW的地址作为呼叫该用户设备的主机地址,具体过程可以参见步骤404。
需要说明的是,为缩短用户面路径减少数据传输时延,对VoLTE呼叫流程还可以加以优化,优化后的信令和媒体面路径如图17所示;则在步骤1204中,第一ATCF还可以不向该对端设备发送该第一用户面资源信息,而是向该对端设备发送该第二用户面资源信息,具体过程可以为:
第一ATCF根据该对端设备的标识信息,向该对端设备发送该MGW的地址,该对端设备接收第一ATCF发送的该MGW的地址,并将该MGW的地址作为呼叫该用户设备的主机地址。
由于该用户设备将该MGW的地址作为呼叫该对端设备的主机地址,从而缩短了用户面路径,减少了数据传输时延。
参见图18,本发明实施例提供了一种S8HR漫游架构下的SRVCC切换方法,该方法是S8HR漫游架构下用户设备被对端设备呼叫的方法流程,该方法应用在第一ATCF和MSC之间,该方法包括:
步骤1301:该用户设备所在的归属地网络的第一ATCF接收该对端设备发送的第一呼叫请求,并为该VoLTE呼叫分配第一用户面资源信息,并向MSC发送第二呼叫请求,该第二呼叫请求携带第一用户面资源信息。
当该对端设备发起VoLTE呼叫流程时,第一ATCF接收了对端设备发送第一呼叫请求,第一呼叫请求用于请求建立VoLTE呼叫,该第一呼叫请求携带该对端设备的标识信息和被叫的用户设备的标识信息。
第一ATCF接收该对端设备发送的第一呼叫请求,并从该第一呼叫请求中获取该用户设备的标识信息和该对端设备的标识信息,并为该VoLTE呼叫分配第一用户面资源信息,该第一用户面资源信息可以为归属地网络中的第一ATGW的地址信息,第一ATCF获取已存储的MSC的地址信息,根据MSC的地址信息向第二ATCF发送第二呼叫请求,该第二呼叫请求除了携带该第一用户面资源信息以外,还可以携带该用户设备的标识信息和该对端设备的标识信息。
步骤1302:MSC接收第一ATCF发送的第二呼叫请求,并为该VoLTE呼叫分配第二用户面资源信息,向第一ATCF发送第二呼叫响应,该第二呼叫响应携带第二用户面资源信息。
MSC接收第一ATCF发送的第二呼叫请求,并从第二呼叫请求中获取第一用户面资源信息、该用户设备的标识信息和该对端设备的标识信息,并为该VoLTE呼叫分配第二用户面资源信息,第二用户面资源信息可以为漫游地网络中的MGW的地址信息,向第一ATCF发送第二呼叫响应,该第二呼叫响应携带第二用户面资源信息、该用户设备的标识信息和该对端设备的标识信息。
第一用户面资源信息和第二用户面资源信息用于在MSC和第一ATCF之间为该VoLTE呼叫建立用户面路径,相应的,MSC根据第一用户面资源信息和第二用户面资源信息,为该VoLTE呼叫建立用户面路径,该用户面路径用于传输该VoLTE呼叫的媒体数据。
其中,第一用户面资源信息可以为第一ATGW的地址,第二用户面资源信息可以为MGW的地址,则MSC根据第一用户面资源信息和第二用户面资源信息,为该VoLTE呼叫建立用户面路径的步骤可以为:
MSC根据MGW的地址,向MGW发送第一建立请求,第一建立请求携带该第一ATGW的地址、该用户设备的标识信息和该对端设备的标识信息,以请求MGW为该VoLTE呼叫建立用户面路径。MGW接收MSC发送的第一建立请求,并根据第一ATGW的地址,与第一ATGW建立用户面路径,该用户面路径用于该用户设备与该对端设备进行通话。
步骤1303:第一ATCF接收MSC发送的第二呼叫响应,并根据第一用户面资源信息和第二用户面资源信息为该VoLTE呼叫建立用户面路径。
第一ATCF接收MSC发送的第二呼叫响应,从该第二呼叫响应中获取该第
二用户面资源信息、该用户设备的标识信息和该对端设备的标识信息,并根据第一用户面资源信息和第二用户面资源信息为该VoLTE呼叫建立用户面路径。
其中,第一ATCF根据第一用户面资源信息和第二用户面资源信息为该VoLTE呼叫建立用户面路径的步骤可以为:
第一ATCF根据第一ATGW的地址,向第一ATGW发送第二建立请求,该第二建立请求携带该MGW的地址、该用户设备的标识信息和该对端设备的标识信息,以请求第一ATGW为该VoLTE呼叫建立用户面路径。第一ATGW接收第一ATCF发送的第二建立请求,并根据MGW的地址,与MGW建立用户面路径,该用户面路径用于该用户设备与该对端设备进行通话。
步骤1304:第一ATCF根据该用户设备的标识信息,向该用户设备发送第三呼叫请求,该第三呼叫请求中携带该第一用户面资源。
第一ATCF根据该用户设备的标识信息,向该用户设备发送该第一ATGW的地址,该用户设备接收第一ATCF发送的该第一ATGW的地址,并将该第一ATGW的地址作为呼叫该对端设备的主机地址。
需要说明的是,在步骤1304中,为缩短用户面路径减少数据传输时延,对VoLTE呼叫流程还可以加以优化,第一ATCF还可以不向该用户设备发送该第一用户面资源,而是向该用户设备发送该第二用户面资源,具体过程可以为:
第一ATCF根据该用户设备的标识信息,向该用户设备发送该MGW的地址,该用户设备接收第一ATCF发送的该MGW的地址,并将该MGW的地址作为呼叫该对端设备的主机地址。
由于该用户设备将该MGW的地址作为呼叫该对端设备的主机地址,从而缩短了用户面路径,减少了数据传输时延。
参见图19,本发明实施例提供了一种S8HR漫游架构下的SRVCC切换方法,该方法是用户设备发生SRVCC切换的方法流程,该方法应用在漫游地网络中的MSC和第一ATCF之间,该方法包括:
步骤1401:MSC接收MME发送的SRVCC切换请求,该SRVCC切换请求携带第一ATCF生成的会话转换标识,并根据该会话转换标识,向第一ATCF发送会话转换请求。
当用户设备因移出LTE网络覆盖区无法继续VoLTE会话而触发SRVCC切
换流程时,也即在该VoLTE呼叫发生SRVCC切换时,MME向MSC发送SRVCC切换请求,该SRVCC切换请求携带第一ATCF在用户设备的IMS注册过程中生成的会话转换标识,该会话转换标识是个全局性唯一标识。
MSC接收MME发送的SRVCC切换请求,并从该SRVCC切换请求中获取第一ATCF生成的会话转换标识,根据该会话转换标识寻址到第一ATCF,向第一ATCF发送会话转换请求,该会话转换请求携带该会话转换标识和用户设备当前会话的会话标识以及对应媒体面MGW的地址信息。
会话标识用于标识用户设备,并和该用户设备当前的会话进行关联。
步骤1402:第一ATCF接收MSC发送的会话转换请求,并根据该会话转换请求,向AS或S-CSCF发送接入转换更新请求。
该接入转换更新请求携带该会话转换标识和该会话标识,由于在本发明实施例中无需切换MGW至远端用户设备的远端媒体面路径,因此,该接入转换更新请求中可以不携带第二用户面资源信息,也即会话描述信息不改变。
该接入转换更新请求用于在MSC与AS或S-CSCF之间建立一个新的会话并使得AS或S-CSCF关联新的会话与远端会话。
步骤1403:AS或S-CSCF接收第一ATCF发送的接入转换更新请求,在MSC与AS或MSC与S-CSCF之间建立一个新的会话,并关联该新的会话与远端会话。
AS或S-CSCF向第一ATCF发送接入转换更新响应,该接入转换更新响应用于指示AS或S-CSCF已成功对用户设备的当前会话进行切换。
第一ATCF向MSC发送SRVCC切换响应,该SRVCC切换响应用于指示AS或S-CSCF已成功对用户设备的当前会话进行切换。
在将MSC作为媒体面锚定时,实现了SRVCC过程中漫游地网络中的MSC至远端用户设备的媒体面路径并不发生改变,只需要完成MSC至近端用户设备的接入路径切换,也即只需要用户设备从LTE网络接入GERAN/UTRAN网络,就可以完成整个SRVCC流程,相比于现有技术的需要跨越长路径(尤其是在国际漫游情况下)才能完成接入腿媒体面路径转换,从而可以大大缩小SRVCC切换终端时延。
需要说明的是,如图20,VoLTE呼叫的信令和媒体面依然锚定在漫游地网络中的MSC,且信令面路径不变,变化的是VoLTE呼叫的媒体面路径不经过第
一ATCF,直接建立在主叫拜访地和被叫拜访地。
在本发明实施例中,将漫游地网络中的MSC作为信令和媒体面锚点,在发生SRVCC切换时,MSC不需要改变到远端的媒体路径,这样可以缩短SRVCC切换过程的信令和媒体面切换距离,从而大大缩短中断时延,提高用户体验。
需要说明的是:上述实施例提供的S8HR漫游架构下的SRVCC切换的装置在S8HR漫游架构下的SRVCC切换时,仅以上述各功能模块的划分进行举例说明,实际应用中,可以根据需要而将上述功能分配由不同的功能模块完成,即将装置的内部结构划分成不同的功能模块,以完成以上描述的全部或者部分功能。另外,上述实施例提供的S8HR漫游架构下的SRVCC切换的装置与S8HR漫游架构下的SRVCC切换的方法实施例属于同一构思,其具体实现过程详见方法实施例,这里不再赘述。
本领域普通技术人员可以理解实现上述实施例的全部或部分步骤可以通过硬件来完成,也可以通过程序来指令相关的硬件完成,所述的程序可以存储于一种计算机可读存储介质中,上述提到的存储介质可以是只读存储器,磁盘或光盘等。
以上所述仅为本发明的较佳实施例,并不用以限制本发明,凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。
Claims (22)
- 一种S8HR漫游架构下的SRVCC切换方法,其特征在于,所述方法包括:用户设备对应的归属地网络中的第一锚定设备接收第一呼叫请求,所述第一呼叫请求用于请求建立基于长期演进的语音VoLTE呼叫,并为所述VoLTE呼叫分配第一用户面资源信息;所述第一锚定设备向所述用户设备当前所在的漫游地网络中的第二锚定设备发送第二呼叫请求,所述第二呼叫请求携带所述第一用户面资源信息;所述第一锚定设备接收所述第二锚定设备发送的第二呼叫响应,所述第二呼叫响应携带所述第二锚定设备为所述VoLTE呼叫分配的第二用户面资源信息,所述第一用户面资源信息和所述第二用户面资源信息用于在所述第二锚定设备和所述第一锚定设备之间为所述VoLTE呼叫建立用户面路径,所述用户面路径用于传输所述VoLTE呼叫的媒体数据;在所述VoLTE呼叫发生单一无线语音通话连续性SRVCC切换时,所述第一锚定设备接收所述第二锚定设备发送的第一接入转换更新请求,并根据所述第一接入转换更新请求向应用服务器AS或服务呼叫会话控制功能S-CSCF发送第二接入转换更新请求,所述第一接入转换更新请求和所述第二接入转换更新请求用于请求在所述第二锚定设备与所述AS或在所述第二锚定设备与所述S-CSCF之间建立一个新的会话并使得所述AS或所述S-CSCF关联所述新的会话与远端会话。
- 根据权利要求1所述的方法,其特征在于,所述用户设备对应的归属地网络中的第一锚定设备接收第一呼叫请求之前,还包括:所述第一锚定设备接收所述用户设备发送的第一注册请求,并根据所述第一注册请求确定所述用户设备为S8HR漫游用户设备;所述第一锚定设备获取所述第二锚定设备的标识信息,所述第二锚定设备用于S8HR漫游架构下的漫游用户的SRVCC切换,并根据所述第二锚定设备的标识信息,向所述第二锚定设备发送所述用户设备的第二注册请求,所述第二注册请求用于为所述用户设备请求注册于所述第二锚定设备;所述第一锚定设备接收所述第二锚定设备发送的所述第二注册请求对应的第二注册响应,所述第二注册响应携带所述第二锚定设备生成的用于SRVCC切换的会话转换标识;所述第一锚定设备向查询/服务呼叫会话控制功能设备I/S-CSCF发送第三注册请求,所述第三注册请求中携带所述会话转换标识,所述第三注册请求用于为所述用户设备请求注册于所述I/S-CSCF。
- 根据权利要求1所述的方法,其特征在于,所述S8HR漫游用户设备为漫游入所述漫游地网络,且需要采用基于S8接口的归属路由HR通信机制进行VoLTE的用户设备。
- 根据权利要求2或3所述的方法,其特征在于,所述第一锚定设备获取所述第二锚定设备的标识信息,包括:所述第一锚定设备获取所述用户设备当前所在的位置信息;所述第一锚定设备根据所述位置信息,获取所述第二锚定设备的标识信息。
- 根据权利要求2所述的方法,其特征在于,所述会话转换标识用于在所述漫游地网络中标识所述第二锚定设备,以便在SRVCC切换过程中所述漫游地网络中的移动交换中心MSC能根据所述会话转换标识定位所述第二锚定设备。
- 根据权利要求2或3所述的方法,其特征在于,所述第一锚定设备据所述第一注册请求,确定所述用户设备为S8HR漫游用户设备,包括:所述第一锚定设备获取所述用户设备当前所在的位置信息,以及所述用户设备的签约信息;所述第一锚定设备根据所述位置信息和所述签约信息,确定所述用户设备为S8HR漫游用户设备。
- 根据权利要求1至6任一所述的方法,其特征在于,所述第一锚定设备包括第一接入转换转发控制功能设备ATCF。
- 一种S8HR漫游架构下的SRVCC切换方法,其特征在于,所述方法包括:用户设备当前所在的漫游地网络中的第二锚定设备接收所述用户设备的归属地网络的第一锚定设备发送的第二呼叫请求,所述第二呼叫请求用于请求建立基于长期演进的语音VoLTE呼叫,且所述第二呼叫请求携带所述第一锚定设备为所述VoLTE呼叫分配的第一用户面资源信息;所述第二锚定设备为所述VoLTE呼叫分配第二用户面资源信息,并向所述第一锚定设备发送第二呼叫响应,所述第二呼叫响应携带所述第二用户面资源信息,所述第一用户面资源信息和所述第二用户面资源信息用于在所述第一锚定设备和所述第二锚定设备之间为所述VoLTE呼叫建立用户面路径,所述用户面路径用于传输所述VoLTE呼叫的媒体数据;在所述VoLTE呼叫发生单一无线语音通话连续性SRVCC切换时,所述第二锚定设备接收所述用户设备漫游地的移动交换中心MSC发送的所述VoLTE呼叫的SRVCC接入转换消息后,所述第二锚定设备向所述第一锚定设备发送第一接入转换更新请求,所述第一接入转换更新请求用于请求所述第一锚定设备向应用服务器AS或服务呼叫会话控制功能S-CSCF发送第二接入转换更新请求,所述第一接入转换更新请求和所述第二接入转换更新请求用于请求在所述第二锚定设备与所述AS或在所述第二锚定设备与所述S-CSCF之间建立一个新的会话并使得所述AS或所述S-CSCF关联所述新的会话与远端会话。
- 根据权利要求8所述的方法,其特征在于,所述用户设备当前所在的漫游地网络中的第二锚定设备接收所述用户设备的归属地网络的第一锚定设备发送的第二呼叫请求之前,还包括:所述第二锚定设备接收所述第一锚定设备发送的第二注册请求,所述第二锚定设备用于S8HR漫游架构下的漫游用户的SRVCC切换;所述第二锚定设备根据所述第二注册请求,生成用于SRVCC切换的会话转换标识;所述第二锚定设备向所述第一锚定设备发送所述第二注册请求对应的第二注册响应,所述第二注册响应携带所述会话转换标识,以使所述第一锚定设备向查询/服务呼叫会话控制功能设备I/S-CSCF发送第三注册请求,所述第三注册 请求中携带所述会话转换标识,所述第三注册请求用于为所述用户设备请求注册于所述I/S-CSCF。
- 根据权利要求8或9所述的方法,其特征在于,所述会话转换标识用于在所述漫游地网络中标识所述第二锚定设备,以便在SRVCC切换过程中MSC能根据所述会话转换标识定位所述第二锚定设备。
- 根据权利要求8至10任一所述的方法,其特征在于,所述第二锚定设备包括第二接入转换转发控制功能设备ATCF。
- 一种S8HR漫游架构下的SRVCC切换装置,其特征在于,所述装置应用在用户设备对应的归属地网络中的第一锚定设备中,包括:第一接收器,用于接收第一呼叫请求,所述第一呼叫请求用于请求建立基于长期演进的语音VoLTE呼叫,并为所述VoLTE呼叫分配第一用户面资源信息;第一发射器,用于向所述用户设备当前所在的漫游地网络中的第二锚定设备发送第二呼叫请求,所述第二呼叫请求携带所述第一用户面资源信息;所述第一接收器,还用于接收所述第二锚定设备发送的第二呼叫响应,所述第二呼叫响应携带所述第二锚定设备为所述VoLTE呼叫分配的第二用户面资源信息,所述第一用户面资源信息和所述第二用户面资源信息用于在所述第二锚定设备和所述第一锚定设备之间为所述VoLTE呼叫建立用户面路径,所述用户面路径用于传输所述VoLTE呼叫的媒体数据;所述第一接收器,还用于在所述VoLTE呼叫发生单一无线语音通话连续性SRVCC切换时,接收所述第二锚定设备发送的第一接入转换更新请求;所述第一发射器,还用于根据所述第一接入转换更新请求向应用服务器AS或服务呼叫会话控制功能S-CSCF发送第二接入转换更新请求,所述第一接入转换更新请求和所述第二接入转换更新请求用于请求在所述第二锚定设备与所述AS或在所述第二锚定设备与所述S-CSCF之间建立一个新的会话并使得所述AS或所述S-CSCF关联所述新的会话与远端会话。
- 根据权利要求12所述的装置,其特征在于,所述装置还包括:第一处 理器;所述第一接收器,还用于接收所述用户设备发送的第一注册请求;所述第一处理器,用于根据所述第一注册请求确定所述用户设备为S8HR漫游用户设备;所述第一处理器,还用于获取所述第二锚定设备的标识信息,所述第二锚定设备用于S8HR漫游架构下的漫游用户的SRVCC切换;所述第一发射器,还用于根据所述第二锚定设备的标识信息,向所述第二锚定设备发送所述用户设备的第二注册请求,所述第二注册请求用于为所述用户设备请求注册于所述第二锚定设备;所述第一接收器,还用于接收所述第二锚定设备发送的所述第二注册请求对应的第二注册响应,所述第二注册响应携带所述第二锚定设备生成的用于SRVCC切换的会话转换标识;所述第一发射器,还用于向查询/服务呼叫会话控制功能设备I/S-CSCF发送第三注册请求,所述第三注册请求中携带所述会话转换标识,所述第三注册请求用于为所述用户设备请求注册于所述I/S-CSCF。
- 根据权利要求12所述的装置,其特征在于,所述S8HR漫游用户设备为漫游入所述漫游地网络,且需要采用基于S8接口的归属路由HR通信机制进行VoLTE的用户设备。
- 根据权利要求13或14所述的装置,其特征在于,所述第一处理器,还用于获取所述用户设备当前所在的位置信息;所根据所述位置信息,获取所述第二锚定设备的标识信息。
- 根据权利要求13所述的装置,其特征在于,所述会话转换标识用于在所述漫游地网络中标识所述第二锚定设备,以便在SRVCC切换过程中所述漫游地网络中的移动交换中心MSC能根据所述会话转换标识定位所述第二锚定设备。
- 根据权利要求13或14所述的装置,其特征在于,所述第一处理器,还用于获取所述用户设备当前所在的位置信息,以及所述用户设备的签约信息;根据所述位置信息和所述签约信息,确定所述用户设备为S8HR漫游用户设备。
- 根据权利要求12至17任一所述的装置,其特征在于,所述第一锚定设备包括第一接入转换转发控制功能设备ATCF。
- 一种S8HR漫游架构下的SRVCC切换装置,其特征在于,所述装置应用在用户设备当前所在的漫游地网络中的第二锚定设备中,包括:第二接收器,用于接收所述用户设备的归属地网络的第一锚定设备发送的第二呼叫请求,所述第二呼叫请求用于请求建立基于长期演进的语音VoLTE呼叫,且所述第二呼叫请求携带所述第一锚定设备为所述VoLTE呼叫分配的第一用户面资源信息;第二发射器,用于为所述VoLTE呼叫分配第二用户面资源信息,并向所述第一锚定设备发送第二呼叫响应,所述第二呼叫响应携带所述第二用户面资源信息,所述第一用户面资源信息和所述第二用户面资源信息用于在所述第二锚定设备和所述第一锚定设备之间为所述VoLTE呼叫建立用户面路径,所述用户面路径用于传输所述VoLTE呼叫的媒体数据;所述第二发射器,还用于在所述VoLTE呼叫发生单一无线语音通话连续性SRVCC切换时,接收所述用户设备漫游地的移动交换中心MSC发送的所述VoLTE呼叫的SRVCC接入转换消息后,向所述第一锚定设备发送第一接入转换更新请求,所述第一接入转换更新请求用于请求所述第一锚定设备向应用服务器AS或服务呼叫会话控制功能S-CSCF发送第二接入转换更新请求,所述第一接入转换更新请求和所述第二接入转换更新请求用于请求在所述第二锚定设备与所述AS或在所述第二锚定设备与所述S-CSCF之间建立一个新的会话并使得所述AS或所述S-CSCF关联所述新的会话与远端会话。
- 根据权利要求19所述的装置,其特征在于,所述装置还包括:第二处理器;所述第二接收器,还用于接收所述第一锚定设备发送的第二注册请求,所 述第二锚定设备用于S8HR漫游架构下的漫游用户的SRVCC切换;所述第二处理器,用于根据所述第二注册请求,生成用于SRVCC切换的会话转换标识;所述第二发射器,还用于向所述第一锚定设备发送所述第二注册请求对应的第二注册响应,所述第二注册响应携带所述会话转换标识,以使所述第一锚定设备向查询/服务呼叫会话控制功能设备I/S-CSCF发送第三注册请求,所述第三注册请求中携带所述会话转换标识,所述第三注册请求用于为所述用户设备请求注册于所述I/S-CSCF。
- 根据权利要求19或20所述的装置,其特征在于,所述会话转换标识用于在所述漫游地网络中标识所述第二锚定设备,以便在SRVCC切换过程中MSC能根据所述会话转换标识定位所述第二锚定设备。
- 根据权利要求19至21任一所述的装置,其特征在于,所述第二锚定设备包括第二接入转换转发控制功能设备ATCF。
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101924751A (zh) * | 2009-05-22 | 2010-12-22 | 中兴通讯股份有限公司 | 一种单模业务连续性实现方法及单模业务连续性系统 |
US20120044838A1 (en) * | 2009-05-05 | 2012-02-23 | Huawei Device Co.,Ltd. | Session transfer method, device and system |
CN102577510A (zh) * | 2011-12-28 | 2012-07-11 | 华为技术有限公司 | 保持呼叫连续的方法和设备 |
US20120220300A1 (en) * | 2009-11-11 | 2012-08-30 | Zte Corporation | Method and system for realizing session handover |
CN104205886A (zh) * | 2013-12-03 | 2014-12-10 | 华为技术有限公司 | 保持呼叫连续性的方法及设备 |
WO2015070420A1 (en) * | 2013-11-14 | 2015-05-21 | Qualcomm Incorporated | Dual radio voice call continuity |
-
2016
- 2016-06-02 WO PCT/CN2016/084569 patent/WO2017206150A1/zh active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120044838A1 (en) * | 2009-05-05 | 2012-02-23 | Huawei Device Co.,Ltd. | Session transfer method, device and system |
CN101924751A (zh) * | 2009-05-22 | 2010-12-22 | 中兴通讯股份有限公司 | 一种单模业务连续性实现方法及单模业务连续性系统 |
US20120220300A1 (en) * | 2009-11-11 | 2012-08-30 | Zte Corporation | Method and system for realizing session handover |
CN102577510A (zh) * | 2011-12-28 | 2012-07-11 | 华为技术有限公司 | 保持呼叫连续的方法和设备 |
WO2015070420A1 (en) * | 2013-11-14 | 2015-05-21 | Qualcomm Incorporated | Dual radio voice call continuity |
CN104205886A (zh) * | 2013-12-03 | 2014-12-10 | 华为技术有限公司 | 保持呼叫连续性的方法及设备 |
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