WO2011038613A1 - 一种带有彩铃的振铃状态会话的切换系统及方法 - Google Patents

一种带有彩铃的振铃状态会话的切换系统及方法 Download PDF

Info

Publication number
WO2011038613A1
WO2011038613A1 PCT/CN2010/075359 CN2010075359W WO2011038613A1 WO 2011038613 A1 WO2011038613 A1 WO 2011038613A1 CN 2010075359 W CN2010075359 W CN 2010075359W WO 2011038613 A1 WO2011038613 A1 WO 2011038613A1
Authority
WO
WIPO (PCT)
Prior art keywords
session
crbt
scc
media
handover request
Prior art date
Application number
PCT/CN2010/075359
Other languages
English (en)
French (fr)
Inventor
李世涛
李振东
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to EP10819842.5A priority Critical patent/EP2485530B1/en
Priority to US13/498,400 priority patent/US8412283B2/en
Priority to CA2775984A priority patent/CA2775984C/en
Publication of WO2011038613A1 publication Critical patent/WO2011038613A1/zh

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/1016—IP multimedia subsystem [IMS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/1063—Application servers providing network services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/02—Calling substations, e.g. by ringing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
    • H04W36/00224—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies between packet switched [PS] and circuit switched [CS] network technologies, e.g. circuit switched fallback [CSFB]
    • H04W36/00226—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies between packet switched [PS] and circuit switched [CS] network technologies, e.g. circuit switched fallback [CSFB] wherein the core network technologies comprise IP multimedia system [IMS], e.g. single radio voice call continuity [SRVCC]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M7/00—Arrangements for interconnection between switching centres
    • H04M7/12—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal
    • H04M7/1205—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal where the types of switching equipement comprises PSTN/ISDN equipment and switching equipment of networks other than PSTN/ISDN, e.g. Internet Protocol networks
    • H04M7/1225—Details of core network interconnection arrangements
    • H04M7/123—Details of core network interconnection arrangements where the packet-switched network is an Internet Protocol Multimedia System-type network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies

Definitions

  • the present invention relates to the field of communications, and more particularly to a switching system and method for ringing state sessions with color ring tones.
  • PS Packet Switch
  • UTRAN UTRAN-HSPA
  • CS Circuit Switch
  • FIG. 1 shows a handover mode approved by the standards organization.
  • a call is being made between UE1 101 and UE2, which is a PS bearer based on IMS (IP Multimedia Core Network Subsystem). Anchored to the SCC AS (Service Centralization and Continuity Application Server).
  • the UE1 101 moves to a better area of the CS network coverage.
  • the UE1 101 sends the received signal test report to the MME (Mobility Management Entity, mobility management entity) through the original PS network.
  • MME Mobility Management Entity, mobility management entity
  • the handover request is sent to an MSC (Mobile Switching Centre) 103 that can cover the UE1, and the MSC 103 sends the handover request to the IMS network.
  • MSC Mobile Switching Centre
  • the SCC AS updates the session with the UE2 after receiving the handover request.
  • the MSC returns a response to the handover completion of the MME, and the MME returns a handover completion response to the UE1.
  • UE1 receives the handover completion response, it disconnects from the PS network and establishes a connection with the CS network through the MSC 103.
  • the calling and called users are not aware of the handover.
  • FIG. 2 is a flow chart of an existing ringing state session switching, including the following steps:
  • the UE1 sends a call request to the IMS network through an I-CSCF (Interrogating Call Session Control Function) or an S-CSCF (Serving Call Session Control Function) of the calling network, requesting Talk to UE2;
  • I-CSCF Interrogating Call Session Control Function
  • S-CSCF Serving Call Session Control Function
  • the I-CSCF or the S-CSCF of the calling network forwards the call request to the SCC AS according to the registration capability of the UE1.
  • the SCC AS anchors the call request to prepare for the subsequent handover
  • the SCC AS returns the call request to the I-CSCF or the S-CSCF of the calling network;
  • the I-CSCF or the S-CSCF of the calling network routes the call request to the S-CSCF of the called network according to the number of the called user.
  • the S-CSCF of the called network routes the call request to the called user UE2;
  • the UE2 After receiving the call request, the UE2 sends a 180 ringing to the calling user UE1, indicating that the called UE2 has received the request, responds to the path along the request from the back to the front, and passes through the S-CSCF of the called network.
  • UE1 receives the test of the CS network due to the change of the location. 4 The UE indicates that the CS network signal is better, and the session of the PS needs to be switched to the CS network.
  • the access layer network element (such as the MME) notifies the MSC that the MSC or the MSC initiates a handover request to the IMS network through the MGCF (Media Gateway Control Function), and the request message passes through the calling network.
  • MME Media Gateway Control Function
  • I-CSCF or S-CSCF I-CSCF or S-CSCF
  • the I-CSCF or the S-CSCF of the calling network sends a handover request to the SCC AS.
  • the SCC AS After receiving the handover request, the SCC AS finds a call that is being performed by the UE1 according to the content of the request, and sends an update request, and the I-CSCF or the S-CSCF of the calling network reaches the S-CSCF of the called network. Mainly updating the media type and sending address of the calling UE1;
  • the S-CSCF of the called network updates the call being made with the UE1. 213. After the UE2 is updated, send a response to the update completion to the S-CSCF of the called network.
  • the S-CSCF of the called network returns the update completion response to the SCC AS through the I-CSCF or S-CSCF of the calling network;
  • the SCC AS After receiving the response of the called update, the SCC AS sends a response to the handover completion to the I-CSCF or the S-CSCF of the calling network.
  • the I-CSCF or the S-CSCF of the calling network sends a response to the completion of the handover to the MSC, or sends the response to the MSC through the MGCF.
  • the switch is basically completed. However, this switch does not take into account the situation where the call has a ring back tone, especially if the forking (forked) mode is used to provide the CRBT service.
  • FIG. 3 is a simplified flowchart of a conventional CRBT service, including the following steps:
  • the UE1 initiates a call request, and carries the media resource information of the UE1, and passes through the IMS network element.
  • the IMS network element routes the call request to a CRBT service provider (CAT AS, Customized Alerting Tone Application Server).
  • CAT AS Customized Alerting Tone Application Server
  • the CAT AS routes the call request to the called UE2 through the IMS network element;
  • the CAT AS uses the dialog 2 to send a response message of the call request to the UE1, and carries the color ring media information, and the message passes through the IMS network element;
  • the IMS network element forwards the response message sent by the CAT AS to the calling UE1, so that the UE1 negotiates with the CAT AS to provide the media resource of the CRBT service.
  • the UE2 sends a response message of the call request to the UE1 by using the conversation 1, and carries the media resource information used by the UE2 for the normal call.
  • the message arrives at the UE1 through the IMS network element, the CAT AS, and the IMS network element, so that the UE1 negotiates with the UE2.
  • Media resources for normal calls are not limited to the IMS network element, the CAT AS, and the IMS network element.
  • the UE1 negotiates the call media resource information (referred to as normal media resource information and uses the dialog 1) with the UE 2, and also negotiates the CRBT media resource information with the CAT AS (using the conversation 2). .
  • the SCC AS receives the handover request, only the media resource information with the UE2 is updated, and the CRBT media resource information is no longer updated.
  • the calling user may have such an experience.
  • the caller hears the ring tone that the called party plays, and the caller's position changes, and the PS network needs to be connected to the CS network.
  • the CRBT media is not updated, the ringtone heard by the calling party will suddenly be disconnected, and the normal ringtone will not be played. At this time, the calling party may think that the call failed and the call is dropped.
  • the technical problem to be solved by the present invention is to provide a switching system and method for a ringing state session with a color ring tone, which can complete the update of normal media resources when the session in the ringing state is switched from the PS network to the CS network.
  • the update of the CRBT media is also completed, which ensures that the experience of the calling subscriber to the CRBT service will not change.
  • the present invention provides a method for switching a ringing state session with a color ring tone.
  • the handover process includes:
  • the handover request After the service centralized and continuous application server (SCC AS) receives the handover request, if it is determined that the session to be switched is a ringing session, and the forked presence ringtone dialog and the normal media negotiation session occur, the handover is performed.
  • the SCC AS assists in completing the handover of the normal media negotiation session and the switching of the CRBT session.
  • the step of the SCC AS associating the handover request with the CRBT session and the normal media negotiation session includes:
  • the SCC AS associates the normal media negotiation session with the CRBT session, and after receiving the handover request, performs the handover request with the normal media negotiation session and the CRBT session. Associated; or
  • the SCC AS After receiving the handover request, the SCC AS associates the handover request, the normal media negotiation session, and the CRBT session.
  • the step of the SCC AS assisting to complete the handover of the normal media negotiation session and the switching of the CRBT session includes: After receiving the handover request from the mobile switching center (MSC), the SCC AS first sends an update request for the CRBT media session to the CRBT service providing server (CAT AS), carrying circuit switched (CS) media resource information, the CAT AS After receiving the update request of the CRBT media session, the CRBT media session is negotiated and updated, and then an update response is returned to the SCC AS, and the CRBT media resource information is carried, and the SCC AS receiving the update response passes the service call session control function. (S-CSCF) returning a handover request response to the MSC, carrying the CRBT media resource information;
  • S-CSCF service call session control function
  • the SCC AS After the called user replies to the response, the SCC AS completes the switch to the normal media negotiation session in a three-way control manner.
  • the step of the SCC AS assisting to complete the handover of the normal media negotiation session and the switching of the CRBT session includes:
  • the SCC AS After receiving the handover request sent by the mobile switching center (MSC), the SCC AS sends an update request of the normal media negotiation session, carrying circuit switching (CS) media resource information, and the update request is sent by the CRBT service providing server (CAT AS) Forwarding to the called user, and returning a handover request response to the MSC through the Serving Call Session Control Function (S-CSCF), after receiving the update completion response, carrying the information of the CRBT media session; after receiving the handover request response, the MSC receives the handover request response Sending an invitation message to the S-CSCF, where the information of the CRBT media session is carried, the S-CSCF forwards the received invitation message to the SCC AS, and the SCC AS forwards the invitation message to the CAT AS, and the CAT AS completes the CRBT media.
  • S-CSCF Serving Call Session Control Function
  • the negotiation update of the dialog and then returning the update completion response of the CRBT media session to the SCC AS, carrying the CRBT media resource information on the CAT AS, and the SCC AS forwards the update completion response of the CRBT media session to the MSC via the S-CSCF.
  • the method includes: the SCC AS associates a normal media negotiation session with the same session identifier, calling user information, or calling number with the CRBT session; the step includes: the SCC AS will have a normal media negotiation session and a CRBT session with the same calling number. And switch request to associate.
  • the present invention also provides a method for switching a ringing state session with a color ring tone.
  • the handover process includes: After the service centralized and continuous application server (SCC AS) receives the handover request, if it is determined that the session to be switched is a ringing session, and only the CRBT conversation exists in the session, the switching of the CRBT conversation is initiated first;
  • SCC AS service centralized and continuous application server
  • the SCC AS After receiving the off-hook response of the called user, the SCC AS completes the handover of the normal media negotiation session when it is determined that the normal media negotiation session included in the call is associated with the previous CRBT conversation.
  • the principle that the SCC AS determines that the normal media negotiation session is associated with the CRBT conversation is that the two conversations have the same session identifier, calling party information or calling number.
  • the SCC AS completes the handover of the normal media negotiation session by using a three-party control manner.
  • the present invention also provides a switching system for a ringing state session with a color ring tone, including a service concentration and continuity application server (SCC AS);
  • SCC AS service concentration and continuity application server
  • the SCC AS is configured to: after receiving the handover request, if it is determined that the session to be switched is to associate the handover request with a CRBT session and a normal media negotiation session; and assist in completing the handover of the normal media negotiation session and the ringback Switching of sessions.
  • the SCC AS is set to:
  • the normal media negotiation session is associated with the CRBT session
  • the handover request is associated with the normal media negotiation session and the CRBT session after receiving the handover request
  • the SCC AS After the SCC AS receives the handover request, it associates the handover request, the normal media negotiation session, and the ring back tone session.
  • the system further comprises a mobile switching center (MSC), a service call session control function (S-CSCF), and a CRBT service providing server (CAT AS);
  • MSC mobile switching center
  • S-CSCF service call session control function
  • CAT AS CRBT service providing server
  • the process of the SCC AS assisting in completing the handover of the normal media negotiation session and the switching of the CRBT session includes:
  • the SCC AS After receiving the handover request sent by the MSC, the SCC AS sends an update request of the normal media negotiation session, where the circuit exchange (CS) media resource information is carried, and the normal media negotiation session is updated.
  • the request is forwarded to the called user by the CAT AS; and after receiving the update completion response replied by the called user, the S-CSCF returns a handover request response to the MSC, where the information of the CRBT media session is carried; after receiving the handover request response, the MSC receives the handover request response.
  • the CAT AS completes the negotiation update of the CRBT media conversation after receiving the invitation message, and returns an update completion response of the CRBT media conversation to the SCC AS, carrying the CRBT on the CAT AS Media resource information, the SCC AS forwards the update completion response of the CRBT media session to the MSC via the S-CSCF.
  • the system further comprises a mobile switching center (MSC), a service call session control function (S-CSCF), and a CRBT service providing server (CAT AS);
  • MSC mobile switching center
  • S-CSCF service call session control function
  • CAT AS CRBT service providing server
  • the process of the SCC AS assisting in completing the handover of the normal media negotiation session and the switching of the CRBT session includes:
  • the SCC AS After receiving the handover request sent by the MSC, the SCC AS first sends an update request for the CRBT media session to the CAT AS, and carries circuit switching (CS) media resource information, and the CAT AS receives the update request of the CRBT media session.
  • CS circuit switching
  • the SCC AS After receiving the handover request sent by the MSC, the SCC AS first sends an update request for the CRBT media session to the CAT AS, and carries circuit switching (CS) media resource information, and the CAT AS receives the update request of the CRBT media session.
  • CS circuit switching
  • the SCC AS associates a normal media negotiation session with the same session identifier, calling user information or calling number with the CRBT session;
  • the SCC AS associates a normal media negotiation session, a ring back tone session, and a handover request with the same calling number.
  • the present invention also provides a switching system for a ringing state session with a color ring tone, including a Service Concentration and Continuous Application Server (SCC AS);
  • SCC AS Service Concentration and Continuous Application Server
  • the SCC AS is configured to: after receiving the handover request, if it is determined that the session to be switched is a ringing session, and only the CRBT conversation exists in the session, the switching of the CRBT conversation is initiated; After the called user's off-hook response, when it is determined that the normal media negotiation dialog included therein is associated with the previous CRBT conversation, the switching to the normal media negotiation session is completed.
  • the principle that the SCC AS determines that the normal media negotiation session is associated with the CRBT conversation is that the two conversations have the same session identifier, calling party information or calling number.
  • the SCC AS After the SCC AS receives the off-hook response of the called user, the SCC AS completes the handover of the normal media negotiation session by using a three-party control manner.
  • the present invention provides a switching system and method for a ringing state session with a color ring tone.
  • a call is played using a forking mode to play a ring back tone media
  • a handover occurs from the PS network to the CS network.
  • the update of the call request dialog is completed and the update of the CRBT media session is completed, the service experience of the caller to the CRBT media does not change, and the normal call request is not affected, and the existing IMS architecture is not required. Make changes, simple and easy.
  • the present invention can be applied to SRVCC, as well as PS to CS switching in a normal SC.
  • Figure 1 is a diagram of an existing switching architecture
  • FIG. 3 is a simplified flowchart of a conventional CRBT service provided
  • FIG. 4 is a flowchart of switching a ringing state session with a color ring tone according to Embodiment 1 of the present invention
  • FIG. 5 is a flowchart of switching a ringing state session with a color ring back tone according to Embodiment 2 of the present invention
  • FIG. 7 is a flowchart of a method for switching a ringing state session with a color ring back tone according to the present invention.
  • the present invention provides a handover system for a ringing state session with a color ring tone, including an MSC, a CAT AS, an SCC AS, an S-CSCF, and a called user;
  • the SCC AS is configured to associate the handover request with the CRBT session and the normal media negotiation session after receiving the handover request; and assist in completing the handover of the CRBT session.
  • the SCC AS associates the normal media negotiation session with the CRBT session, and then associates the handover request with the normal media negotiation session and the CRBT session after receiving the handover request; or the SCC AS receives After the handover request, the handover request, the normal media negotiation session, and the ring back tone session are associated.
  • the normal media negotiation session of the session identification, calling party information or calling number is performed with the CRBT session to associate a normal media negotiation session, a ring back tone session and a handover request with the same calling number.
  • the SCC AS assists in completing the handover of the normal media negotiation session and the switching of the CRBT session includes:
  • the SCC AS sends an update request of the normal media negotiation session after receiving the handover request sent by the MSC, where the CS media resource information is carried, and the update request of the normal media negotiation session is forwarded to the called user via the CAT AS;
  • the S-CSCF After the update of the user response is completed, the S-CSCF returns a handover request response to the MSC, which carries the information of the CRBT media session.
  • the MSC After receiving the handover request response, the MSC sends an invitation message, where the information of the CRBT media conversation is carried.
  • the CAT AS After the S-CSCF and the SCC AS are forwarded to the CAT AS, the CAT AS completes the negotiation update of the CRBT media session after receiving the invitation message, and returns an update completion response of the CRBT media session to the SCC AS, where the CRBT media resource information on the CAT AS is carried.
  • the SCC AS forwards the update completion response of the CRBT media session to the MSC via the S-CSCF;
  • the SCC AS After receiving the handover request sent by the MSC, the SCC AS first sends an update request for the CRBT media session to the CAT AS, and carries the CS media resource information, and the CAT AS receives the update request of the CRBT media session and then performs the CRBT media session. After the update is performed, the update response is returned to the SCC AS, and the CRBT media resource information is carried. The SCC AS that receives the update response returns a handover request response to the MSC through the S-CSCF, and carries the CRBT media resource information. After the called user replies with the response, The SCC AS completes the switch to the normal media negotiation session in a three-way control manner.
  • the present invention also provides a method for switching a ringing state session with a color ring tone.
  • the SCC AS associates the handover request with the CRBT session and the normal media negotiation session after receiving the handover request. And the SCC AS assists in completing the switch to the normal media negotiation dialog And switching to the CRBT session.
  • FIG. 4 is a flow chart of switching a ringing state session with a color ring tone according to Embodiment 1 of the present invention.
  • the SCC AS initiates an update to the CRBT media session, so that the handover of the PS network to the CS network is implemented without affecting the user service experience.
  • the normal call is negotiated with the conversation 1
  • the ringtone media uses the dialogue 2 to negotiate; as shown in Figure 4, the process includes:
  • the calling UE1 initiates a call request, carrying the media resource information of the UE1, and the message passes through the S-CSCF;
  • the S-CSCF forwards the call request to the SCC AS.
  • the SCC AS anchors the call request.
  • the SCC AS sends a call request to the S-CSCF;
  • the S-CSCF routes the call request to the called user network, and forwards the call to the CAT AS by the S-CSCF of the called user network.
  • the CAT AS sends a call request to the called user UE2 through the S-CSCF of the called network;
  • the CAT AS receives the call request, and finds that the calling party supports the CRBT service, and uses the conversation 2 to reply the call response message to the calling party, and carries the CRBT media resource information;
  • the SCC AS sends a response dialog sent by the CAT AS through the I/S-CSCF of the calling network.
  • the information of 2 is anchored on the SCC AS, and the call response message is forwarded to the calling UE1;
  • the called UE2 After receiving the call request, the called UE2 sends a call response, and carries the media resource information of the UE2 user's normal call (referred to as the normal media negotiation dialog of UE2, and uses the dialogue 1);
  • the SCC AS forwards the call response message sent by the UE2 to the calling UE1;
  • the MSC sends a handover request to the IMS network, and carries the media resource information of the MSC (because it is used to connect with the CS media, referred to as CS media resource information); 416.
  • the S-CSCF forwards the handover request to the SCC AS.
  • the SCC AS receives the foregoing handover request, finds that the calling user is in a ringing state session with the color ring tone, associates the handover request with the established conversation 1 and the conversation 2, and then initiates the conversation 2 to the CAT AS.
  • An update request of the dialog which carries the CS media resource information in step 415;
  • Associating the handover request with the conversation 1 and the conversation 2 may be to associate the handover request having the same calling number with the conversation 1 and the conversation 2.
  • the SCC AS may also associate the two conversations after the establishment of the conversation 1 and the conversation 2, for example, may be associated according to Call-ID (call ID), From Tag (from the label) or the calling number; After the handover request, the handover request is associated with the two associated conversations according to the calling number.
  • Call-ID call ID
  • From Tag from the label
  • the handover request is associated with the two associated conversations according to the calling number.
  • the CAT AS after receiving the dialog 2 (color ring media dialogue) update request, the CAT AS returns an update response to the SCC AS, where the color ring media resource information is carried, and the color ring media is updated.
  • the SCC AS After receiving the update response, the SCC AS returns a handover request response to the S-CSCF, where the CRBT media resource information is carried, and the handover request response is a response to the handover request in step 416.
  • the S-CSCF forwards the received handover request response to the MSC.
  • the CAT AS forwards a 200 OK response message, and the message passes through the SCC AS;
  • the SCC AS Since the previous SCC AS associates the conversation 1 (normal media negotiation conversation) with the conversation 2 (color ring media conversation), the SCC AS delays forwarding the 200 OK response to the calling UE1; the SCC AS initiates the conversation by means of three-party control.
  • the update request of the normal media negotiation dialog in this embodiment, the SCC AS sends an update request to the UE2, but the update request does not carry the media resource information, and the update request passes through the CAT AS;
  • the CAT AS forwards the received update request to the UE2 via the S-CSCF of the called network;
  • the UE2 returns an update response, where the media resource information of the UE2 for the call is carried.
  • the message passes through the CAT AS;
  • the CAT AS forwards the received update response, and the message passes through the SCC AS;
  • the SCC AS sends an update request to the UE1, where the media resource information in step 426 is carried, and the message passes through the S-CSCF of the calling network.
  • the S-CSCF of the calling network forwards the received update request to the MSC;
  • the MSC returns an update response to the UE2, where the CS media resource information of the MSC is carried, and the message passes through the S-CSCF;
  • the S-CSCF forwards the received update response, and the message passes through the SCC AS;
  • the SCC AS sends an acknowledgement message (ACK) to the UE2, where the CS media resource information in step 431 is carried, and the message passes through the CAT AS;
  • ACK acknowledgement message
  • the CAT AS forwards the received ACK to the UE2 through the S-CSCF of the called network;
  • the SCC AS returns a 200 OK response to the S-CSCF of the calling network.
  • This step may be performed after step 431, i.e., may be performed concurrently with step 432.
  • the S-CSCF forwards the received 200 OK response to the MSC;
  • Step 423 435 uses a three-way control method, and the implementation method is not only the one process, but also can use other processes to update the dialogues at both ends.
  • the specific process is not limited by the present invention, and should be used according to specific situations. The right process.
  • FIG. 5 is a flowchart of switching a ringing state session with a color ring tone according to Embodiment 2 of the present invention.
  • the AS notifies the MSC that the CRBT media session needs to be updated when the handover completes the response, and then the MSC initiates an update to the CRBT media session.
  • the process includes the following steps:
  • the calling UE1 initiates a call request.
  • the S-CSCF forwards the call request to the SCC AS.
  • the SCC AS anchors the call request.
  • the SCC AS sends a call request to the S-CSCF. 505.
  • the S-CSCF routes the call request to the called user network.
  • the called network receives the call request, forwards the request to the CAT AS, and the CAT AS sends the call request to the called user UE2 through the called network;
  • the CAT AS receives the call request, and finds that the calling party supports the CRBT service, and uses the conversation 2 to reply the call response message to the calling party, and carries the CRBT media resource information;
  • the SCC AS forwards the call response message to the calling party through the I/S-CSCF of the calling network.
  • the called UE2 uses the conversation 1 to respond to the call request;
  • the SCC AS anchors the response to the call request to the SCC AS, and forwards the response to the calling UE1;
  • the MSC sends a handover request to the IMS network, and carries the media resource information of the MSC (because it is used for connecting with the CS media, referred to as CS media resource information);
  • the S-CSCF forwards the handover request to the SCC AS;
  • the SCC AS receives the foregoing handover request, and finds that the calling user associates the handover request with the established conversation 1 and the conversation 2 when performing a ringing state session with the color ring tone; and then initiates a conversation with the called user.
  • 1 (normal media negotiation dialog) update request which carries the CS media resource information in step 515;
  • Associating the handover request with the conversation 1 and the conversation 2 may be to associate the handover request having the same calling number with the conversation 1 and the conversation 2.
  • the SCC AS may also associate the two conversations after the establishment of the conversation 1 and the conversation 2, for example, may be associated according to the Call-ID, From Tag or the calling number; when the handover request is received, the handover is requested.
  • the two conversations that have been associated are associated.
  • the UE2 performs a negotiation update on the conversation 1, and returns a dialog 1 update completion response, and carries the media resource information of the UE2.
  • the CAT AS forwards the received update completion response of the conversation 1 to the SCC AS;
  • the SCC AS receives the update completion response of the conversation 1, and inserts the color ring media conversation 2 into the And the update completion response of the information inserted into the CRBT media dialog 2 is sent to the S-CSCF through the handover request response message, and the information of the CRBT media conversation 2 may be the ID of the CRBT media conversation 2;
  • the S-CSCF forwards the received handover request response to the MSC;
  • the MSC sends a new invitation message to the S-CSCF according to the information of the CRBT media session 2 carried in the handover request response, where the information of the received CRBT media conversation 2, such as the ID of the CRBT media conversation 2, is carried.
  • the S-CSCF forwards the received invitation message to the SCC AS.
  • the SCC AS receives an invitation message including the information of the CRBT media session 2, and forwards the invitation message to the CAT AS, where the information of the received CRBT media conversation 2, such as the ID of the CRBT media conversation 2, is carried;
  • the CAT AS negotiates and updates the CRBT media conversation 2, returns an update completion response of the CRBT media conversation 2 to the SCC AS, and carries the CRBT media resource information on the CAT AS;
  • the SCC AS forwards the received update completion response of the CRBT media conversation 2 to the S-CSCF;
  • the S-CSCF forwards the received update completion response of the CRBT media session 2 to the MSC.
  • the update of Dialogue 1 (Normal Media Negotiation Dialogue) and Dialogue 2 (Ring Bell Media Dialogue) is completed.
  • FIG. 6 is a flowchart of switching a ringing state session with a color ring tone according to Embodiment 3 of the present invention.
  • a normal media negotiation session occurs in a 200 OK response, and before receiving the handover request, the SCC AS does I don't know that the called party has a forbell (fork), so only the update of the ringtone media conversation (conversation 2) is initiated.
  • the normal media negotiation dialogue (conversation 1) is known.
  • the normal media negotiation dialog is associated with the CRBT media session, and a handover update to the normal media negotiation session is initiated. As shown in FIG. 4, the process includes:
  • the calling UE1 initiates a call request, carrying the media resource information SDP (Session Description Protocol) request of the UE1, and the message passes through the S-CSCF;
  • SDP Session Description Protocol
  • the S-CSCF forwards the call request to the SCC AS.
  • the SCC AS anchors the call request
  • the SCC AS sends a call request to the S-CSCF; 605, the S-CSCF routes the call request to the called user network, and is forwarded by the S-CSCF of the called user network to the CAT AS;
  • the CAT AS sends the call request to the called user through the S-CSCF of the called network.
  • the called user UE-2 uses the conversation 1 to reply to the calling UE1 with a call request response, which does not include the media information of the UE2, that is, does not include the SDP information;
  • the CAT AS after receiving the response message of the UE2, the CAT AS replaces it with an early media response (conversation 2), and replies to the calling UE1 with a call response message carrying the color ring media resource information SDP response;
  • the SCC AS anchors the information of the early media response (Dialog 2) sent by the CAT AS to the SCC AS through the I/S-CSCF of the calling network, and forwards the call response message to the calling UE1;
  • the MSC sends a handover request to the IMS network, and carries the media resource information of the MSC (because it is used for connecting with the CS media, referred to as CS media resource information);
  • the S-CSCF forwards the handover request to the SCC AS.
  • the SCC AS finds that the calling user is in the ringing state session with the color ring tone, and only anchors the early media conversation 1 with the color ring tone, and the CAT AS initiates the update of the conversation 2 (the color ring media dialogue).
  • the request where the CS media resource information in step 612 is carried;
  • the CAT AS After receiving the dialog 2 (color ring media dialogue) update request, the CAT AS returns an update response to the SCC AS, where the color ring media resource information is carried, and the color ring media is updated.
  • the SCC AS After receiving the update response, the SCC AS returns a handover request response to the S-CSCF, where the CRBT media resource information is carried, and the handover request response is a response to the handover request in step 613.
  • the S-CSCF forwards the received handover request response to the MSC.
  • the called user responds, and sends a 200 OK response to the UE1, where the media information SDP response of the called user is carried, and the normal media negotiation session 1 is used;
  • the CAT AS ends the playback of the ring back tone
  • the CAT AS forwards a 200 OK response message, and the message passes through the SCC AS;
  • the SCC AS judges the conversation 1 (normal media negotiation dialogue) and the conversation 2 (color ring media pair In association with, the principle that the dialog 1 is associated with the dialog 2 may be that they have the same calling number and their Call-ID and From Tag are the same; the SCC AS delays forwarding the 200 OK response to the calling UE1.
  • the SCC AS may use the SDP information received in the 200 OK to initiate an update to the previous handover request.
  • the S-CSCF forwards the received update handover request to the MSC.
  • the MSC returns an update response to the received update handover request, where the SDP response of the CS media is carried.
  • the S-CSCF sends an update response to the SCC AS.
  • the SCC AS after receiving the update response, the SCC AS initiates a renegotiation request to the called user UE2, where the SDP information in the received update response is carried, and is sent to the UE2 as a new SDP request;
  • UE2 replies with 200 OK, which carries an SDP response of normal media;
  • the SCC AS sends an acknowledgement message (ACK) to UE2.
  • ACK acknowledgement message
  • 619 629 uses the three-way control method.
  • the implementation method is not only this one process, but also can use other processes to update the dialogues at both ends.
  • the specific process is not limited by the present invention, and it should be adapted according to the specific situation. Process.
  • the technical solution of the present invention does not need to modify the existing IMS architecture, and only needs to enhance the functions of some network elements to implement the PS network for the ongoing call with the ring back tone media. Switch to the CS network.
  • the present invention provides a switching system and method for a ringing state session with a color ring tone.
  • a call is played using a forking mode to play a color ring tone medium
  • the pair is completed.
  • the update of the normal media resources also completes the update of the CRBT media. Therefore, the service experience of the calling user to the CRBT media does not change, and the normal call request is not affected, and the existing IMS architecture does not need to be modified, which is simple and easy.
  • the present invention can be applied to SRVCC, as well as PS to CS switching in a normal SC.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

本发明提供了一种带有彩铃的振铃状态会话的切换系统及方法，当有彩铃的振铃状态会话发生切换时，所述的切换过程包括：SCC AS收到切换请求后，如果判断需要切换的会话是一个振铃状态的会话，且发生了分叉存在彩铃对话和正常媒体协商对话，将所述切换请求与彩铃会话以及正常媒体协商对话进行关联；所述SCC AS协助完成对正常媒体协商对话的切换以及对彩铃会话的切换。采用本发明，对于使用分叉模式来播放彩铃媒体的呼叫，当发生从PS网络到CS网络的切换时，既完成对正常媒体资源的更新，也完成对彩铃媒体的更新，因此主叫用户对彩铃媒体的业务体验不会改变，从而不影响正常的呼叫请求，且不需要对现有IMS架构做修改，简单易行。

Description

一种带有彩铃的振铃状态会话的切换系统及方法
技术领域
本发明涉及通信领域， 更具体地涉及一种带有彩铃的振铃状态会话的切 换系统及方法。
背景技术
现在的移动网络中， 大量基于 PS ( Packet Switch, 分组交换） 的网络 ( E-UTRAN, UTRAN-HSPA )被部署， 但其覆盖并不是全网络全地区的， 在 某些地方 PS网络的信号会很差， 这个时候就需要为用户提供 PS到传统 CS (Circuit Switch, 电路交换）（如 UTRAN, GERAN )的切换， 尤其是当用户正 在进行会话的时候。
图 1示出了一种被标准组织认可的切换方式， 首先 UE1 101与 UE2之间 正在进行一个通话， 该通话是基于 IMS ( IP Multimedia Core Network Subsystem, IP多媒体子系统 )的 PS承载， 其会话被锚定在 SCC AS ( Service Centralization and Continuity Application Server , 业务集中及连续性应用服务 器）上。 在通话进行的过程中， UE1 101移动到 CS网络覆盖更好的区域， 这 时 UE1 101将收到的信号测试报告，通过原来的 PS网络，发给 MME( Mobility Management Entity, 移动性管理实体） 102, 当 MME 102收到测试报告知道 要进行 PS到 CS切换的时候， 发送切换请求给可以覆盖 UE1 的一个 MSC ( Mobile Switching Centre,移动交换中心）103 , MSC 103将切换请求发到 IMS 网络， 由于会话是锚定在 SCC AS上， SCC AS收到切换请求后会更新与 UE2 的会话， 当会话更新完成后， MSC会给 MME回一个切换完成的响应， MME 将切换完成响应返回给 UE1 , 当 UE1收到切换完成响应后就断开与 PS网络 的连接， 并通过 MSC 103与 CS网络建立连接。 整个切换过程中， 主叫用户 和被叫用户对于切换是不可感知的。
对于一个正在进行的呼叫， 即主叫发送呼叫请求， 被叫处于振铃状态还 没有应答， 主叫这时可以听见被叫订制的彩铃或是普通的铃声。 对于这样的 呼叫， 如果满足切换的条件也可以进行切换。 图 2为现有振铃状态会话切换的流程图， 包括如下步骤：
201 , UE1 通过主叫网络的 I-CSCF ( Interrogating Call Session Control Function, 查询呼叫会话控制功能）或 S-CSCF ( Serving Call Session Control Function, 服务呼叫会话控制功能） 向 IMS 网络发送起呼请求， 要求与 UE2 对话；
202, 主叫网络的 I-CSCF或 S-CSCF收到起呼请求时， 根据 UE1的注册 能力， 将起呼请求转发到 SCC AS;
203 , SCC AS对这个起呼请求进行锚定， 为后面的切换做准备；
204, SCC AS再将起呼请求返回给主叫网络的 I-CSCF或 S-CSCF;
205, 主叫网络的 I-CSCF或 S-CSCF根据被叫用户的号码， 将起呼请求 路由到被叫网络的 S-CSCF;
206, 被叫网络的 S-CSCF将起呼请求路由到被叫用户 UE2;
207, UE2收到起呼请求以后， 向主叫用户 UE1发送 180响铃， 表明被 叫 UE2 已经收到请求， 响应沿着请求的路径从后到前， 经过被叫网络的 S-CSCF、 主叫网络的 I-CSCF或 S-CSCF、 SCC AS、 主叫网络的 I-CSCF或 S-CSCF, 最终到达 UE1 ;
208, 此时 UE1由于位置发生改变， 收到 CS网络的测试 4艮告表明 CS网 络信号更好， 需要将 PS的对话切换到 CS网络；
209,接入层网元（比如 MME )通知 MSC,由 MSC或者 MSC通过 MGCF (媒体网关控制功能 )向 IMS网络发起切换请求， 请求消息经过主叫网络的
I-CSCF或 S-CSCF;
210, 主叫网络的 I-CSCF或 S-CSCF将切换请求发送到 SCC AS;
211 , SCC AS收到切换请求后， 根据请求中的内容找到 UE1正在进行的 一个呼叫进行更新， 发送更新请求， 经过主叫网络的 I-CSCF或 S-CSCF到达 被叫网络的 S-CSCF, 主要更新主叫 UE1的媒体类型和发送地址；
212,被叫网络的 S-CSCF收到更新请求后，对正在与 UE1进行的呼叫进 行更新； 213 , UE2更新完以后向被叫网络的 S-CSCF发送更新完成的应答；
214, 被叫网络的 S-CSCF将更新完成的应答经过主叫网络的 I-CSCF或 S-CSCF返回给 SCC AS;
215, SCC AS收到被叫更新完成的应答以后， 向主叫网络的 I-CSCF或 S-CSCF发送切换完成的应答；
216, 主叫网络的 I-CSCF或 S-CSCF将切换完成的应答发送给 MSC, 或 通过 MGCF发送给 MSC。
此时切换基本就完成了。 但这个切换中没有考虑到呼叫有彩铃的情况， 尤其是釆用 forking (分叉）模式来提供彩铃业务的情况。
图 3为现有提供彩铃业务的简化流程图， 包括如下步骤：
301 , UE1发起一个起呼请求， 携带 UE1的媒体资源信息， 经过 IMS网 元；
302, IMS网元将呼叫请求路由到被叫网络的彩铃业务提供服务器 ( CAT AS , Customized Alerting Tone Application Server )上；
303 , CAT AS通过 IMS网元将呼叫请求路由到被叫 UE2;
304, CAT AS釆用对话 2向 UE1发送起呼请求的响应消息，携带彩铃媒 体信息， 消息途经 IMS网元；
305, IMS网元将 CAT AS发送的响应消息转发到主叫 UE1 , 使 UE1与 CAT AS协商好提供彩铃业务的媒体资源；
306, UE2釆用对话 1向 UE1发送起呼请求的响应消息， 携带 UE2用于 正常通话的媒体资源信息， 消息途经 IMS网元、 CAT AS、 IMS网元， 到达 UE1 , 使 UE1与 UE2协商好正常通话的媒体资源。
在上面的起呼流程可以看出， UE1在与 UE2协商通话媒体资源信息（称 为正常媒体资源信息， 釆用对话 1 ) 的同时， 还与 CAT AS协商彩铃媒体资 源信息 （釆用对话 2 ) 。
如果按图 2所示流程进行切换， 当 SCC AS收到切换请求以后， 只会更 新与 UE2的媒体资源信息， 而彩铃媒体资源信息就不再更新了， 对于一个正 在进行的起呼， 主叫用户可能会有这样的体验， 当电话接通的时候， 主叫听 到被叫为其播放的彩铃， 此时主叫位置发生改变， 需要进行 PS网络到 CS网 络的切换， 当切换完成以后， 由于没有更新彩铃媒体， 主叫听到的彩铃会突 然断掉， 而正常的铃声也不会播放， 此时主叫可能会以为呼叫失败而挂掉电 话。
发明内容
本发明要解决的技术问题是提供一种带有彩铃的振铃状态会话的切换系 统及方法， 可实现振铃状态的会话从 PS网络到 CS网络切换时， 既完成对正 常媒体资源的更新， 也完成对彩铃媒体的更新， 保证了主叫用户对彩铃业务 的体验不会改变。
为了解决上述问题， 本发明提供了一种带有彩铃的振铃状态会话的切换 方法， 当有彩铃的振铃状态会话发生切换时， 所述的切换过程包括：
业务集中及连续性应用服务器（SCC AS )收到切换请求后， 如果判断需 要切换的会话是一个振铃状态的会话， 且发生了分叉存在彩铃对话和正常媒 体协商对话， 则将所述切换请求与彩铃对话话以及正常媒体协商对话进行关 联； 以及
所述 SCC AS协助完成对正常媒体协商对话的切换以及对彩铃会话的切 换。
优选地， 所述 SCC AS将切换请求与彩铃会话以及正常媒体协商对话进 行关联的步骤包括：
当所述正常媒体协商对话与彩铃会话建立完成后， 所述 SCC AS将正常 媒体协商对话与彩铃会话进行关联， 当收到切换请求后再将所述切换请求与 正常媒体协商对话及彩铃会话进行关联； 或者
所述 SCC AS收到切换请求后将切换请求、 正常媒体协商对话以及彩铃 会话进行关联。
优选地， 所述 SCC AS协助完成对正常媒体协商对话的切换以及对彩铃 会话的切换的步骤包括： 当 SCC AS收到移动交换中心 （MSC )发来的切换请求后， 先向彩铃业 务提供服务器 ( CAT AS )发送彩铃媒体对话的更新请求，携带电路交换 ( CS ) 媒体资源信息， 所述 CAT AS收到所述彩铃媒体对话的更新请求后对所述彩 铃媒体对话进行协商更新， 之后向 SCC AS返回更新应答， 携带彩铃媒体资 源信息，收到所述更新应答的 SCC AS通过服务呼叫会话控制功能 ( S-CSCF ) 向 MSC返回切换请求应答， 携带所述彩铃媒体资源信息； 以及
当被叫用户回复应答响应之后， 所述 SCC AS釆用三方控制的方式完成 对正常媒体协商对话的切换。
优选地， 所述 SCC AS协助完成对正常媒体协商对话的切换以及对彩铃 会话的切换的步骤包括：
当所述 SCC AS收到移动交换中心 （MSC )发来的切换请求后， 发送正 常媒体协商对话的更新请求， 携带电路交换（CS )媒体资源信息， 该更新请 求经彩铃业务提供服务器（ CAT AS )转发至被叫用户， 并在收到更新完成应 答后通过服务呼叫会话控制功能（S-CSCF ) 向 MSC返回切换请求应答， 其 中携带彩铃媒体对话的信息； 所述 MSC收到切换请求应答后， 向 S-CSCF发 送邀请消息，其中携带所述彩铃媒体对话的信息， S-CSCF将接收的邀请消息 转发至 SCC AS, SCC AS将所述邀请消息转发至 CAT AS , CAT AS完成对 彩铃媒体对话的协商更新， 之后向 SCC AS返回彩铃媒体对话的更新完成应 答， 携带 CAT AS上的彩铃媒体资源信息， 所述 SCC AS将彩铃媒体对话的 更新完成应答经 S-CSCF转发至 MSC。
包括： SCC AS将具有相同的会话标识、主叫用户信息或主叫号码的正常媒体 协商对话与彩铃会话进行关联； 骤包括： SCC AS将具有相同的主叫号码的正常媒体协商对话、彩铃会话及切 换请求进行关联。
本发明还提供一种带有彩铃的振铃状态会话的切换方法， 当有彩铃的振 铃状态会话发生切换时， 所述的切换过程包括： 业务集中及连续性应用服务器（SCC AS )收到切换请求后， 如果判断需 要切换的会话是一个振铃状态的会话， 且该会话中只存在彩铃对话， 则先发 起对彩铃对话的切换； 以及
所述 SCC AS收到被叫用户的摘机应答后， 当判断其中包含的正常媒体 协商对话与之前的彩铃对话相关联时， 完成对正常媒体协商对话的切换。
优选地， 所述 SCC AS判断正常媒体协商对话与彩铃对话相关联的原则 是， 两个对话具有相同的会话标识、 主叫用户信息或主叫号码。 优选地， 当 所述 SCC AS收到被叫用户的摘机应答后， 所述 SCC AS釆用三方控制的方 式完成对正常媒体协商对话的切换。
本发明还提供一种带有彩铃的振铃状态会话的切换系统， 包括业务集中 及连续性应用服务器（SCC AS ) ； 其中，
所述 SCC AS设置为： 在收到切换请求后， 如果判断需要切换的会话是 将所述切换请求与彩铃会话以及正常媒体协商对话进行关联； 以及协助完成 对正常媒体协商对话的切换以及对彩铃会话的切换。
优选地， 为将切换请求与彩铃会话以及正常媒体协商对话进行关联， 所 述 SCC AS设置为：
当所述正常媒体协商对话与彩铃会话建立完成后， 将正常媒体协商对话 与彩铃会话进行关联， 当收到切换请求后再将所述切换请求与正常媒体协商 对话及彩铃会话进行关联； 或者
在 SCC AS收到切换请求后将切换请求、 正常媒体协商对话以及彩铃会 话进行关联。
优选地， 所述系统还包括移动交换中心（MSC ) 、 服务呼叫会话控制功 能 ( S-CSCF )及彩铃业务提供服务器 ( CAT AS ) ；
所述 SCC AS协助完成对正常媒体协商对话的切换以及对彩铃会话的切 换的过程包括：
SCC AS 收到 MSC发来的切换请求后发送正常媒体协商对话的更新请 求， 其中携带电路交换（CS )媒体资源信息， 所述正常媒体协商对话的更新 请求经 CAT AS转发至被叫用户； 以及收到被叫用户回复的更新完成应答后 通过 S-CSCF向 MSC返回切换请求应答， 其中携带彩铃媒体对话的信息； MSC收到所述切换请求应答后发送邀请消息， 其中携带所述彩铃媒体对话的 信息， 该邀请消息经8-〇8〇？以及8(^：八8转发至〇 1 8 , 所述 CAT AS收 到邀请消息后完成对彩铃媒体对话的协商更新， 并向 SCC AS返回彩铃媒体 对话的更新完成应答， 携带 CAT AS上的彩铃媒体资源信息， 所述 SCC AS 将彩铃媒体对话的更新完成应答经 S-CSCF转发至 MSC。
优选地， 所述系统还包括移动交换中心（MSC ) 、 服务呼叫会话控制功 能 ( S-CSCF )及彩铃业务提供服务器 ( CAT AS ) ；
所述 SCC AS协助完成对正常媒体协商对话的切换以及对彩铃会话的切 换的过程包括：
当 SCC AS收到 MSC发来的切换请求后，先向 CAT AS发送彩铃媒体对 话的更新请求， 携带电路交换（CS )媒体资源信息， 所述 CAT AS收到所述 彩铃媒体对话的更新请求后对所述彩铃媒体对话进行协商更新， 之后向 SCC AS返回更新应答， 携带彩铃媒体资源信息， 收到所述更新应答的 SCC AS通 过 S-CSCF向 MSC返回切换请求应答， 携带所述彩铃媒体资源信息； 当被叫 用户回复应答响应之后， SCC AS釆用三方控制的方式完成对正常媒体协商对 话的切换。
优选地， 所述 SCC AS将具有相同的会话标识、 主叫用户信息或主叫号 码的正常媒体协商对话与彩铃会话进行关联；
所述 SCC AS将具有相同的主叫号码的正常媒体协商对话、 彩铃会话及 切换请求进行关联。
本发明还一种带有彩铃的振铃状态会话的切换系统， 包括业务集中及连 续性应用服务器（SCC AS ) ； 其中，
所述 SCC AS设置为： 在收到切换请求后， 如果判断需要切换的会话是 一个振铃状态的会话， 且该会话中只存在彩铃对话， 则先发起对彩铃对话的 切换； 以及在收到被叫用户的摘机应答后， 当判断其中包含的正常媒体协商 对话与之前的彩铃对话相关联时， 完成对正常媒体协商对话的切换。 优选地， 所述 SCC AS判断正常媒体协商对话与彩铃对话相关联的原则 是， 两个对话具有相同的会话标识、 主叫用户信息或主叫号码。
优选地， 当所述 SCC AS收到被叫用户的摘机应答后， 所述 SCC AS釆 用三方控制的方式完成对正常媒体协商对话的切换。
综上所述， 本发明提供了一种带有彩铃的振铃状态会话的切换系统及方 法， 对于使用 forking (分叉）模式来播放彩铃媒体的呼叫， 当发生从 PS网络 到 CS 网络的切换时， 既完成对呼叫请求对话的更新， 也完成对彩铃媒体对 话的更新， 因此主叫用户对彩铃媒体的业务体验不会改变， 从而不影响正常 的呼叫请求， 且不需要对现有 IMS架构做修改， 简单易行。
本发明可以应用于 SRVCC, 以及普通 SC中 PS向 CS的切换。 附图概述
图 1为现有切换架构图；
图 2为现有振铃状态会话切换流程图；
图 3为现有提供彩铃业务的简化流程图；
图 4为本发明实施例一的对有彩铃的振铃状态会话进行切换的流程图； 图 5为本发明实施例二的对有彩铃的振铃状态会话进行切换的流程图； 图 6为本发明实施例三的对有彩铃的振铃状态会话进行切换的流程图； 图 7为本发明的对有彩铃的振铃状态会话进行切换的方法的流程图。 本发明的较佳实施方式
下面结合附图和具体实施方式对本发明做进一步详细的说明。
本发明提供一种带有彩铃的振铃状态会话的切换系统， 包括 MSC、 CAT AS、 SCC AS、 S-CSCF及被叫用户；
SCC AS设置为在收到切换请求后将切换请求与彩铃会话以及正常媒体 协商对话进行关联； 以及协助完成对彩铃会话的切换。 正常媒体协商对话与彩铃会话建立完成后， SCC AS将正常媒体协商对话与彩 铃会话进行关联， 当收到切换请求后再将切换请求与正常媒体协商对话及彩 铃会话进行关联； 或者 SCC AS收到切换请求后将切换请求、 正常媒体协商 对话以及彩铃会话进行关联。 的会话标识、 主叫用户信息或主叫号码的正常媒体协商对话与彩铃会话进行 以是将具有相同的主叫号码的正常媒体协商对话、 彩铃会话及切换请求进行 关联。
SCC AS 协助完成对正常媒体协商对话的切换以及对彩铃会话的切换包 括：
( a ) SCC AS收到 MSC发来的切换请求后发送正常媒体协商对话的更 新请求，其中携带 CS媒体资源信息，正常媒体协商对话的更新请求经 CAT AS 转发至被叫用户； 以及收到被叫用户回复的更新完成应答后通过 S-CSCF 向 MSC返回切换请求应答， 其中携带彩铃媒体对话的信息； MSC 收到切换请 求应答后发送邀请消息， 其中携带彩铃媒体对话的信息， 该邀请消息经 S-CSCF以及 SCC AS转发至 CAT AS, CAT AS收到邀请消息后完成对彩铃 媒体对话的协商更新， 并向 SCC AS返回彩铃媒体对话的更新完成应答， 其 中携带 CAT AS上的彩铃媒体资源信息， SCC AS将彩铃媒体对话的更新完成 应答经 S-CSCF转发至 MSC;
( b ) 当 SCC AS收到 MSC发来的切换请求后， 先向 CAT AS发送彩铃 媒体对话的更新请求， 携带 CS媒体资源信息， CAT AS收到彩铃媒体对话的 更新请求后对彩铃媒体对话进行协商更新， 之后向 SCC AS返回更新应答， 携带彩铃媒体资源信息， 收到更新应答的 SCC AS通过 S-CSCF向 MSC返回 切换请求应答，携带彩铃媒体资源信息； 当被叫用户回复应答响应之后， SCC AS釆用三方控制的方式完成对正常媒体协商对话的切换。
本发明还提供一种带有彩铃的振铃状态会话的切换方法， 当振铃状态的 会话发生切换时， SCC AS收到切换请求后，将切换请求与彩铃会话以及正常 媒体协商对话进行关联； 并且 SCC AS协助完成对正常媒体协商对话的切换 以及对彩铃会话的切换。
以下结合附图通过几个实施例详细说明本发明方法。
实施例一
图 4 为本发明实施例一的对带有彩铃的振铃状态会话进行切换的流程 图。 当收到切换请求时， SCC AS发起对彩铃媒体对话的更新， 从而在不影响 用户业务体验的情况下， 实现 PS网络到 CS网络的切换， 本实施例中正常呼 叫釆用对话 1进行协商， 彩铃媒体釆用对话 2进行协商； 如图 4所示， 该流 程包括：
401 , 主叫 UE1发起一个起呼请求， 携带 UE1的媒体资源信息， 消息途 经 S-CSCF;
402, S-CSCF将起呼请求转发到 SCC AS;
403 , SCC AS对起呼请求进行锚定；
404, SCC AS再将起呼请求发送给 S-CSCF;
405 , S-CSCF 将起呼请求路由到被叫用户网络， 由被叫用户网络的 S-CSCF转发给 CAT AS;
406 , CAT AS 再通过被叫网络的 S-CSCF将起呼请求发送给被叫用户 UE2;
407 , CAT AS收到起呼请求， 且发现主叫支持彩铃业务时， 使用对话 2 向主叫回复起呼响应消息 , 携带彩铃媒体资源信息；
408-410, SCC AS通过主叫网络的 I/S-CSCF将 CAT AS发送的应答对话
2的信息锚定在 SCC AS上， 并将起呼响应消息转发到主叫 UE1 ;
411 , 被叫 UE2收到起呼请求后， 发送起呼响应， 携带 UE2用户正常通 话的媒体资源信息 （称为 UE2的正常媒体协商对话， 釆用对话 1 ) ；
412-414, SCC AS将 UE2发送的起呼响应消息转发到主叫 UE1 ;
415 , 主叫用户位置发生改变， 并且满足切换条件， MSC向 IMS网络发 送切换请求， 携带 MSC的媒体资源信息（由于其用于与 CS媒体相连， 称为 CS媒体资源信息） ； 416, S-CSCF将切换请求转发到 SCC AS;
417 , SCC AS收到上述切换请求， 发现主叫用户在进行有彩铃的振铃状 态会话，将该切换请求与上述建立的对话 1和对话 2进行关联；然后向 CAT AS 发起对话 2 (彩铃媒体对话）的更新请求， 其中携带步骤 415中的 CS媒体资 源信息；
将切换请求与对话 1及对话 2关联可以是将具有相同主叫号码的切换请 求与对话 1及对话 2进行关联。
SCC AS还可以是在对话 1与对话 2建立完成后就将这两个对话关联，例 如， 可以根据 Call-ID (呼叫 ID ) 、 From Tag (来自标签）或主叫号码进行关 联； 当收到切换请求后再根据主叫号码将切换请求与已关联的两个对话进行 关联。
418, CAT AS收到对话 2 (彩铃媒体对话） 更新请求以后， 向 SCC AS 返回更新应答， 其中携带彩铃媒体资源信息， 完成彩铃媒体的更新。
419, SCC AS收到更新应答后， 向 S-CSCF返回切换请求应答， 其中携 带彩铃媒体资源信息， 该切换请求应答是对步骤 416中的切换请求的应答；
420, S-CSCF将接收的切换请求应答转发至 MSC。
此时完成了彩铃媒体对话从 PS网络到 CS网络的切换。
421 , 被叫用户应答， 向 UE1发送 200 OK;
422, 应答消息途经 CAT AS时， CAT AS结束彩铃的播放；
423 , CAT AS转发 200 OK应答消息， 消息途经 SCC AS;
424, 由于之前 SCC AS将对话 1 (正常媒体协商对话 )和对话 2 (彩铃 媒体对话 )进行了关联， SCC AS延迟向主叫 UE1转发 200 OK应答； SCC AS 釆用三方控制的方式发起对话 1 (正常媒体协商对话） 的更新请求， 本实施 例中 SCC AS向 UE2发送更新请求， 但该更新请求不携带媒体资源信息， 该 更新请求途经 CAT AS;
425 , CAT AS将接收的更新请求经被叫网络的 S-CSCF转发至 UE2;
426, UE2返回更新响应， 其中携带 UE2的用于通话的媒体资源信息， 消息途经 CAT AS;
427 , CAT AS将接收的更新响应转发， 消息途经 SCC AS;
428, SCC AS向 UE1发送更新请求， 其中携带步骤 426中的媒体资源信 息， 消息途经主叫网络的 S-CSCF;
429, 主叫网络的 S-CSCF将接收的更新请求转发至 MSC;
430, MSC向 UE2返回更新响应， 其中携带 MSC的 CS媒体资源信息， 消息途经 S-CSCF;
431 , S-CSCF将接收的更新响应转发， 消息途经 SCC AS;
432, SCC AS向 UE2发送确认消息 （ ACK ) , 其中携带步骤 431 中的 CS媒体资源信息， 消息途经 CAT AS;
433 , CAT AS将接收的 ACK经被叫网络的 S-CSCF转发至 UE2;
434, SCC AS向主叫网络的 S-CSCF返回 200OK应答；
该步骤可以是在步骤 431之后便执行， 即可以是与步骤 432同时执行。
435 , S-CSCF将接收的 200OK应答转发至 MSC;
此时主叫 UE1和被叫 UE2就完成了呼叫的切换， 并且可以通话了。 其中步骤 423 435釆用的是三方控制的方式， 其实现方法不只这一个流 程， 还可以釆用其他的流程来更新两端的对话， 具体使用哪个流程本发明不 作限制， 要根据具体的情况釆用合适的流程。
实施例二
图 5为本发明实施例二对有彩铃的振铃状态会话进行切换的流程图。 SCC
AS在返回切换完成应答时通知 MSC需要更新彩铃媒体对话， 之后 MSC发 起对彩铃媒体对话的更新， 该流程包括如下步骤：
501 , 主叫 UE1发起一个起呼请求；
502, S-CSCF将起呼请求转发到 SCC AS;
503 , SCC AS对起呼请求进行锚定；
504, SCC AS再将起呼请求发送给 S-CSCF; 505 , S-CSCF将起呼请求路由到被叫用户网络；
506, 被叫网络收到起呼请求， 将请求转发到 CAT AS , CAT AS再通过 被叫网络将起呼请求发送给被叫用户 UE2;
507 , CAT AS收到起呼请求， 且发现主叫支持彩铃业务时， 使用对话 2 向主叫回复起呼响应消息， 携带彩铃媒体资源信息；
508-510, SCC AS通过主叫网络的 I/S-CSCF将起呼响应消息转发到主叫
UE1 ;
511 , 被叫 UE2釆用对话 1 , 对起呼请求进行应答；
512-514, SCC AS将对起呼请求的应答锚定在 SCC AS上， 并将应答转 发到主叫 UE1 ;
515 , 主叫用户位置发生改变， 并且满足切换条件， MSC向 IMS网络发 送切换请求， 携带 MSC的媒体资源信息（由于其用于与 CS媒体相连， 称为 CS媒体资源信息） ；
516, S-CSCF将切换请求转发到 SCC AS;
517-518, SCC AS收到上述切换请求， 发现主叫用户在进行有彩铃的振 铃状态会话时， 将该切换请求与上述建立的对话 1和对话 2进行关联； 然后 向被叫用户发起对话 1 (正常媒体协商对话 )的更新请求， 其中携带步骤 515 中的 CS媒体资源信息；
将切换请求与对话 1及对话 2关联可以是将具有相同主叫号码的切换请 求与对话 1及对话 2进行关联。
SCC AS还可以是在对话 1与对话 2建立完成后就将这两个对话关联，例 如， 可以根据 Call-ID、 From Tag或主叫号码进行关联； 当收到切换请求后再 将切换请与已关联的两个对话进行关联。
519, UE2对对话 1进行协商更新， 返回对话 1更新完成应答， 携带 UE2 的媒体资源信息；
520, CAT AS将接收的对话 1的更新完成应答转发至 SCC AS;
521 , SCC AS收到对话 1的更新完成应答， 向其中插入彩铃媒体对话 2 的信息， 并将插入了彩铃媒体对话 2的信息的更新完成应答通过切换请求应 答消息发送给 S-CSCF,该彩铃媒体对话 2的信息可以是彩铃媒体对话 2的 ID;
522, S-CSCF将接收的切换请求应答转发至 MSC;
523 , MSC根据切换请求应答中携带的彩铃媒体对话 2的信息，向 S-CSCF 发送新的邀请消息， 其中携带接收的彩铃媒体对话 2的信息， 如彩铃媒体对 话 2的 ID;
524, S-CSCF将接收的邀请消息转发至 SCC AS;
525 , SCC AS收到包含彩铃媒体对话 2的信息的邀请消息， 将该邀请消 息转发至 CAT AS, 其中携带接收的彩铃媒体对话 2的信息， 如彩铃媒体对 话 2的 ID;
526, CAT AS对彩铃媒体对话 2进行协商更新， 向 SCC AS返回彩铃媒 体对话 2的更新完成应答， 携带 CAT AS上的彩铃媒体资源信息；
527 , SCC AS将接收的彩铃媒体对话 2的更新完成应答转发至 S-CSCF;
528, S-CSCF将接收的彩铃媒体对话 2的更新完成应答转发至 MSC。 此时对话 1 (正常媒体协商对话 )和对话 2 (彩铃媒体对话 )的更新都完 成了。
实施例三
图 6 为本发明实施例三的对带有彩铃的振铃状态会话进行切换的流程 图， 本实施例中， 正常媒体协商对话发生在 200 OK应答中， 在收到切换请求 前， SCC AS并不知道被叫发生了彩铃的 forking (分叉） ， 所以只发起对彩 铃媒体对话 (对话 2 )的更新， 当收到被叫的 200 OK后， 获知正常媒体协商 的对话 （对话 1 ) , 于是将该正常媒体协商对话与彩铃媒体对话进行关联， 并发起对正常媒体协商对话的切换更新， 如图 4所示， 该流程包括：
601 ,主叫 UE1发起一个起呼请求，携带 UE1的媒体资源信息 SDP( Session Description Protocol, 会话描述协议）请求， 消息途经 S-CSCF;
602, S-CSCF将起呼请求转发到 SCC AS;
603 , SCC AS对起呼请求进行锚定；
604, SCC AS再将起呼请求发送给 S-CSCF; 605 , S-CSCF 将起呼请求路由到被叫用户网络， 由被叫用户网络的 S-CSCF转发给 CAT AS;
606 , CAT AS 再通过被叫网络的 S-CSCF将起呼请求发送给被叫用户
UE2;
607 , 被叫用户 UE-2釆用对话 1向主叫 UE1回复起呼请求应答， 其中不 包含 UE2的媒体信息， 即不包含 SDP信息；
608, CAT AS收到 UE2的应答消息后，将其替换成早媒体应答（对话 2 ) , 向主叫 UE1回复起呼响应消息， 携带彩铃媒体资源信息 SDP应答；
609-611 , SCC AS通过主叫网络的 I/S-CSCF将 CAT AS发送的早媒体应 答（对话 2 ) 的信息锚定在 SCC AS上， 并将起呼响应消息转发到主叫 UE1 ;
612, 主叫用户位置发生改变， 并且满足切换条件， MSC向 IMS网络发 送切换请求， 携带 MSC的媒体资源信息（由于其用于与 CS媒体相连， 称为 CS媒体资源信息） ；
613 , S-CSCF将切换请求转发到 SCC AS;
614, SCC AS收到上述切换请求， 发现主叫用户在进行有彩铃的振铃状 态会话， 且只锚定了有彩铃的早媒体对话 1 , 则 CAT AS发起对话 2 (彩铃媒 体对话） 的更新请求， 其中携带步骤 612中的 CS媒体资源信息；
615 , CAT AS收到对话 2 (彩铃媒体对话） 更新请求以后， 向 SCC AS 返回更新应答， 其中携带彩铃媒体资源信息， 完成彩铃媒体的更新。
616, SCC AS收到更新应答后， 向 S-CSCF返回切换请求应答， 其中携 带彩铃媒体资源信息， 该切换请求应答是对步骤 613中的切换请求的应答；
617 , S-CSCF将接收的切换请求应答转发至 MSC。
此时完成了彩铃媒体对话从 PS网络到 CS网络的切换。
618, 被叫用户应答， 向 UE1发送 200 OK应答， 其中携带有被叫用户的 媒体信息 SDP应答， 并使用正常媒体协商对话 1 ;
应答消息途经 CAT AS时， CAT AS结束彩铃的播放；
619, CAT AS转发 200 OK应答消息， 消息途经 SCC AS;
620, SCC AS判断该对话 1 (正常媒体协商对话）和对话 2 (彩铃媒体对 话）相关联， 对话 1与对话 2关联的原则可以是， 它们具有相同的主叫号码， 且它们的 Call-ID和 From Tag都相同； SCC AS延迟向主叫 UE1转发 200 OK 应答。 釆用三方控制的方式发起对话 1 (正常媒体协商对话） 的更新请求， 具体地， SCC AS可釆用 200 OK中收到的 SDP信息，对之前的切换请求发起 更新
621 , S-CSCF将收到的更新切换请求转发给 MSC;
622, MSC对收到的更新切换请求回复更新应答， 其中携带 CS媒体的 SDP应答；
623 , S-CSCF将更新应答发送给 SCC AS;
624-625, SCC AS收到更新应答后， 向被叫用户 UE2发起重协商请求， 其中携带有收到的更新应答中的 SDP信息， 作为新的 SDP请求发送给 UE2;
626-627, UE2回复 200 OK, 其中携带正常媒体的 SDP应答；
628-629, SCC AS向 UE2发送确认消息（ ACK ) 。
其中 619 629釆用的是三方控制的方式， 其实现方法不只这一个流程， 还可以釆用其他的流程来更新两端的对话， 具体使用哪个流程本发明不作限 制， 要根据具体的情况釆用合适的流程。
综上所述， 釆用本发明的技术方案， 并不需要对现有 IMS架构做修改， 只需要对部分网元的功能进行增强， 就可以实现对正在进行的带彩铃媒体的 呼叫进行 PS网络到 CS网络的切换。
工业实用性
本发明提供了一种带有彩铃的振铃状态会话的切换系统及方法， 对于使 用 forking (分叉）模式来播放彩铃媒体的呼叫， 当发生从 PS网络到 CS网络 的切换时， 既完成对正常媒体资源的更新， 也完成对彩铃媒体的更新， 因此 主叫用户对彩铃媒体的业务体验不会改变， 从而不影响正常的呼叫请求， 且 不需要对现有 IMS架构做修改， 简单易行。 本发明可以应用于 SRVCC, 以 及普通 SC中 PS向 CS的切换。

Claims

权 利 要 求 书
1、 一种带有彩铃的振铃状态会话的切换方法，当有彩铃的振铃状态会话 发生切换时， 所述的切换过程包括：
业务集中及连续性应用服务器（SCC AS )收到切换请求后， 如果判断需 要切换的会话是一个振铃状态的会话， 且发生了分叉存在彩铃对话和正常媒 体协商对话，则将所述切换请求与彩铃会话以及正常媒体协商对话进行关联； 以及
所述 SCC AS协助完成对正常媒体协商对话的切换以及对彩铃会话的切 换。
2、 如权利要求 1所述的方法， 其中， 所述 SCC AS将切换请求与彩铃会 话以及正常媒体协商对话进行关联的步骤包括：
当所述正常媒体协商对话与彩铃会话建立完成后， 所述 SCC AS将正常 媒体协商对话与彩铃会话进行关联， 当收到切换请求后再将所述切换请求与 正常媒体协商对话及彩铃会话进行关联； 或者
所述 SCC AS收到切换请求后将切换请求、 正常媒体协商对话以及彩铃 会话进行关联。
3、 如权利要求 1所述的方法， 其中， 所述 SCC AS协助完成对正常媒体 协商对话的切换以及对彩铃会话的切换的步骤包括：
当 SCC AS收到移动交换中心 （MSC )发来的切换请求后， 先向彩铃业 务提供服务器 ( CAT AS )发送彩铃媒体对话的更新请求，携带电路交换 ( CS ) 媒体资源信息， 所述 CAT AS收到所述彩铃媒体对话的更新请求后对所述彩 铃媒体对话进行协商更新， 之后向 SCC AS返回更新应答， 携带彩铃媒体资 源信息，收到所述更新应答的 SCC AS通过服务呼叫会话控制功能 ( S-CSCF ) 向 MSC返回切换请求应答， 携带所述彩铃媒体资源信息； 以及
当被叫用户回复应答响应之后， 所述 SCC AS釆用三方控制的方式完成 对正常媒体协商对话的切换。
4、 如权利要求 1所述的方法， 其中， 所述 SCC AS协助完成对正常媒体 协商对话的切换以及对彩铃会话的切换的步骤包括： 当所述 SCC AS收到移动交换中心 （MSC )发来的切换请求后， 发送正 常媒体协商对话的更新请求， 携带电路交换（CS )媒体资源信息， 该更新请 求经彩铃业务提供服务器（ CAT AS )转发至被叫用户， 并在收到更新完成应 答后通过服务呼叫会话控制功能（S-CSCF ) 向 MSC返回切换请求应答， 其 中携带彩铃媒体对话的信息； 所述 MSC收到切换请求应答后， 向 S-CSCF发 送邀请消息， 其中携带所述彩铃媒体对话的信息， S-CSCF将接收的邀请消息 转发至 SCC AS, SCC AS将所述邀请消息转发至 CAT AS , CAT AS完成对 彩铃媒体对话的协商更新， 之后向 SCC AS返回彩铃媒体对话的更新完成应 答， 携带 CAT AS上的彩铃媒体资源信息， 所述 SCC AS将彩铃媒体对话的 更新完成应答经 S-CSCF转发至 MSC。
5、 如权利要求 2所述的方法， 其中，
AS将具有相同的会话标识、主叫用户信息或主叫号码的正常媒体协商对话与 彩铃会话进行关联；
所述 SCC AS将切换请求与正常媒体协商对话及彩铃会话进行关联的步 骤包括： SCC AS将具有相同的主叫号码的正常媒体协商对话、彩铃会话及切 换请求进行关联。
6、 一种带有彩铃的振铃状态会话的切换方法，当有彩铃的振铃状态会话 发生切换时， 所述的切换过程包括：
业务集中及连续性应用服务器 ( SCC AS )收到切换请求后， 如果判断需 要切换的会话是一个振铃状态的会话， 且该会话中只存在彩铃对话， 则先发 起对彩铃对话的切换； 以及
所述 SCC AS收到被叫用户的摘机应答后， 当判断其中包含的正常媒体 协商对话与之前的彩铃对话相关联时， 完成对正常媒体协商对话的切换。
7、 如权利要求 6所述的方法， 其中， 所述 SCC AS判断正常媒体协商对 话与彩铃对话相关联的原则是， 两个对话具有相同的会话标识、 主叫用户信 息或主叫号码。
8、 如权利要求 6所述的方法， 其中， 当所述 SCC AS收到被叫用户的摘 机应答后， 所述 SCC AS釆用三方控制的方式完成对正常媒体协商对话的切 换。
9、 一种带有彩铃的振铃状态会话的切换系统，包括业务集中及连续性应 用服务器（SCC AS ) ； 其中，
所述 SCC AS设置为： 在收到切换请求后， 如果判断需要切换的会话是 将所述切换请求与彩铃会话以及正常媒体协商对话进行关联； 以及协助完成 对正常媒体协商对话的切换以及对彩铃会话的切换。
10、 如权利要求 9所述的系统， 其中， 为将切换请求与彩铃会话以及正 常媒体协商对话进行关联， 所述 SCC AS设置为：
当所述正常媒体协商对话与彩铃会话建立完成后， 将正常媒体协商对话 与彩铃会话进行关联， 当收到切换请求后再将所述切换请求与正常媒体协商 对话及彩铃会话进行关联； 或者
在收到切换请求后将切换请求、 正常媒体协商对话以及彩铃会话进行关 联。
11、 如权利要求 9所述的系统， 其中，
所述系统还包括移动交换中心（ MSC )、服务呼叫会话控制功能（ S-CSCF ) 及彩铃业务提供服务器（ CAT AS ) ；
所述 SCC AS协助完成对正常媒体协商对话的切换以及对彩铃会话的切 换的过程包括：
SCC AS 收到 MSC发来的切换请求后发送正常媒体协商对话的更新请 求， 其中携带电路交换（CS )媒体资源信息， 所述正常媒体协商对话的更新 请求经 CAT AS转发至被叫用户； 以及收到被叫用户回复的更新完成应答后 通过 S-CSCF向 MSC返回切换请求应答， 其中携带彩铃媒体对话的信息； MSC收到所述切换请求应答后发送邀请消息， 其中携带所述彩铃媒体对话的 信息， 该邀请消息经 S-CSCF以及 SCC AS转发至 CAT AS , 所述 CAT AS收 到邀请消息后完成对彩铃媒体对话的协商更新， 并向 SCC AS返回彩铃媒体 对话的更新完成应答， 携带 CAT AS上的彩铃媒体资源信息， 所述 SCC AS 将彩铃媒体对话的更新完成应答经 S-CSCF转发至 MSC。
12、 如权利要求 9所述的系统， 其中，
所述系统还包括移动交换中心（ MSC )、服务呼叫会话控制功能（ S-CSCF ) 及彩铃业务提供服务器（ CAT AS ) ；
所述 SCC AS协助完成对正常媒体协商对话的切换以及对彩铃会话的切 换的过程包括：
当 SCC AS收到 MSC发来的切换请求后，先向 CAT AS发送彩铃媒体对 话的更新请求， 携带电路交换（CS )媒体资源信息， 所述 CAT AS收到所述 彩铃媒体对话的更新请求后对所述彩铃媒体对话进行协商更新， 之后向 SCC AS返回更新应答， 携带彩铃媒体资源信息， 收到所述更新应答的 SCC AS通 过 S-CSCF向 MSC返回切换请求应答， 携带所述彩铃媒体资源信息； 当被叫 用户回复应答响应之后， SCC AS釆用三方控制的方式完成对正常媒体协商对 话的切换。
13、 如权利要求 10所述的系统， 其中，
所述 SCC AS将具有相同的会话标识、 主叫用户信息或主叫号码的正常 媒体协商对话与彩铃会话进行关联；
所述 SCC AS将具有相同的主叫号码的正常媒体协商对话、 彩铃会话及 切换请求进行关联。
14、 一种带有彩铃的振铃状态会话的切换系统， 包括业务集中及连续性 应用服务器（SCC AS ) ； 其中，
所述 SCC AS设置为： 在收到切换请求后， 如果判断需要切换的会话是 一个振铃状态的会话， 且该会话中只存在彩铃对话， 则先发起对彩铃对话的 切换； 以及在收到被叫用户的摘机应答后， 当判断其中包含的正常媒体协商 对话与之前的彩铃对话相关联时， 完成对正常媒体协商对话的切换。
15、 如权利要求 14所述的系统， 其中， 所述 SCC AS判断正常媒体协商 对话与彩铃对话相关联的原则是， 两个对话具有相同的会话标识、 主叫用户 信息或主叫号码。
16、 如权利要求 14所述的系统， 其中， 当所述 SCC AS收到被叫用户的 摘机应答后， 所述 SCC AS釆用三方控制的方式完成对正常媒体协商对话的 切换。
PCT/CN2010/075359 2009-09-30 2010-07-21 一种带有彩铃的振铃状态会话的切换系统及方法 WO2011038613A1 (zh)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP10819842.5A EP2485530B1 (en) 2009-09-30 2010-07-21 System and method for switching ringing state session with customized alerting tone
US13/498,400 US8412283B2 (en) 2009-09-30 2010-07-21 System and method for switching ringing state session with customized alerting tone
CA2775984A CA2775984C (en) 2009-09-30 2010-07-21 System and method for switching ringing state session with customized alerting tone

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200910204403.7 2009-09-30
CN200910204403.7A CN102036319B (zh) 2009-09-30 2009-09-30 一种带有彩铃的振铃状态会话的切换系统及方法

Publications (1)

Publication Number Publication Date
WO2011038613A1 true WO2011038613A1 (zh) 2011-04-07

Family

ID=43825532

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2010/075359 WO2011038613A1 (zh) 2009-09-30 2010-07-21 一种带有彩铃的振铃状态会话的切换系统及方法

Country Status (5)

Country Link
US (1) US8412283B2 (zh)
EP (1) EP2485530B1 (zh)
CN (1) CN102036319B (zh)
CA (1) CA2775984C (zh)
WO (1) WO2011038613A1 (zh)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102056249B (zh) * 2009-10-28 2014-04-09 中兴通讯股份有限公司 一种带彩铃会话的起呼请求的切换系统及方法
PL2501107T3 (pl) * 2011-03-15 2014-08-29 Amadeus Sas Sposób oraz system do dostarczania sesji w różnorodnym środowisku
EP2500848A1 (en) 2011-03-15 2012-09-19 Amadeus S.A.S. Method and system for centralized reservation context management on multi-server reservation system
GB2500586B (en) * 2012-03-23 2014-05-07 Samsung Electronics Co Ltd Provision of a customised alerting notification
CN104836775B (zh) 2014-02-08 2019-02-01 中兴通讯股份有限公司 振铃态下的呼叫放音方法及装置
WO2022000161A1 (en) * 2020-06-29 2022-01-06 Orange Method for operating a device for handling a phone call

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101141794A (zh) * 2006-09-08 2008-03-12 华为技术有限公司 用户设备、语音呼叫连续性应用服务器及网络切换方法
WO2008155621A2 (en) * 2007-06-18 2008-12-24 Telefonaktiebolaget Lm Ericsson (Publ) A system and method for enhancing ims centralized services
CN101494842A (zh) * 2009-03-20 2009-07-29 深圳华为通信技术有限公司 一种2g与3g网络间彩铃互通的方法及通信装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007026133A1 (en) * 2005-08-31 2007-03-08 British Telecommunications Public Limited Company Personalised heterogeneous network handover alert scheme
CN100411391C (zh) * 2006-06-02 2008-08-13 中国移动通信集团公司 基于ip多媒体子系统实现个性化回铃音的系统及方法
GB0707387D0 (en) * 2007-04-17 2007-05-23 Lucent Technologies Inc Single radio VCC:LTE-VMSC anchor solution
CN101351032B (zh) * 2007-07-20 2010-08-04 华为技术有限公司 域切换方法及其服务器

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101141794A (zh) * 2006-09-08 2008-03-12 华为技术有限公司 用户设备、语音呼叫连续性应用服务器及网络切换方法
WO2008155621A2 (en) * 2007-06-18 2008-12-24 Telefonaktiebolaget Lm Ericsson (Publ) A system and method for enhancing ims centralized services
CN101494842A (zh) * 2009-03-20 2009-07-29 深圳华为通信技术有限公司 一种2g与3g网络间彩铃互通的方法及通信装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2485530A4 *

Also Published As

Publication number Publication date
EP2485530A4 (en) 2013-03-20
US20120184254A1 (en) 2012-07-19
CA2775984A1 (en) 2011-04-07
EP2485530A1 (en) 2012-08-08
US8412283B2 (en) 2013-04-02
CN102036319A (zh) 2011-04-27
EP2485530B1 (en) 2014-02-19
CA2775984C (en) 2016-01-05
CN102036319B (zh) 2013-11-06

Similar Documents

Publication Publication Date Title
EP1864462B1 (en) Method and apparatus for providing voice call continuity between circuit-switched subsystem and multimedia subsystem
US8180347B2 (en) Domain transferring method for single radio voice call continuity
US8155084B2 (en) User equipment, call continuity application server, and network handover method
RU2617438C2 (ru) Синхронизация состояний вызова сетевого компонента и мобильное устройство при переносе сеанса
US8600006B2 (en) Voice continuity among user terminals
JP6109928B2 (ja) Ｄｒｖｃｃ携帯端末のアクセス転送
WO2009049531A1 (fr) Procédé, dispositif de commande de passerelle réseau multimédia et serveur d'application pour mettre en œuvre l'intercommunication des tonalités de retour d'appel personnalisées
WO2009012665A1 (fr) Procédé pour assurer une continuité d'appel multimédia, équipement et système associés
WO2011038613A1 (zh) 一种带有彩铃的振铃状态会话的切换系统及方法
WO2011140893A1 (zh) 在ip多媒体子系统中管理媒体资源的方法和装置
WO2011050698A1 (zh) 一种带有彩铃的振铃状态会话的切换系统及方法
US9736190B2 (en) Communication system for service control
WO2009015536A1 (fr) Procédé permettant de faire suivre un état occupé décidé par l'utilisateur
WO2010025649A1 (zh) 多媒体铃音业务的呼叫和控制方法、装置及系统
WO2012129979A1 (zh) 振铃态域切换的方法、系统及装置
WO2011130954A1 (zh) 单待终端业务连续性实现方法和系统
WO2012171290A1 (zh) 询问转接实现方法、应用服务器、业务终端和系统
WO2011097966A1 (zh) 一种单模业务连续实现方法和系统
WO2008154780A1 (fr) Procédé pour implémenter un service de retenue d'appel d'un service centralisé de sous-système multimédia ip
WO2011017926A1 (zh) 实现电路域多会话切换到分组域时业务连续性方法及系统
WO2011035694A1 (zh) 来电提示方法及装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 10819842

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 13498400

Country of ref document: US

WWE Wipo information: entry into national phase

Ref document number: 2775984

Country of ref document: CA

Ref document number: 2010819842

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: DE