WO2012088717A1 - 业务切换方法、装置及系统 - Google Patents

业务切换方法、装置及系统 Download PDF

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Publication number
WO2012088717A1
WO2012088717A1 PCT/CN2010/080635 CN2010080635W WO2012088717A1 WO 2012088717 A1 WO2012088717 A1 WO 2012088717A1 CN 2010080635 W CN2010080635 W CN 2010080635W WO 2012088717 A1 WO2012088717 A1 WO 2012088717A1
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WO
WIPO (PCT)
Prior art keywords
terminal
capability
scudif
domain network
network entity
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Application number
PCT/CN2010/080635
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English (en)
French (fr)
Inventor
祝宁
郑波
夏木强
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华为技术有限公司
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.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2010/080635 priority Critical patent/WO2012088717A1/zh
Priority to CN2010800052237A priority patent/CN102714828A/zh
Publication of WO2012088717A1 publication Critical patent/WO2012088717A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0011Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0022Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
    • H04W36/00224Control 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]
    • H04W36/00226Control 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]

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a service switching method, apparatus, and system. Background technique
  • IP Multimedia Subsystem is a subsystem supporting IP multimedia services. It is a core network of telecom next-generation core network and independent of access technology. Based on the Session Initiation Protocol (SIP), IMS uses SIP call control mechanisms to create, manage, and terminate various types of multimedia services.
  • SIP Session Initiation Protocol
  • vSRVCC Video Single Radio Voice Call Continuity
  • 3GPP 3rd Generation Partnership Project
  • PS Packet Switched
  • CS Circuit Switching
  • vSRVCC is a kind of business continuity, and it is necessary to consider simultaneous switching of video plus voice.
  • the vSRVCC switch performs voice call handover first, performs remote leg update, and establishes a CS voice call bearer; then the terminal initiates a new SETUP message, and establishes a new multimedia call bearer with the network, and the CS voice call is Suspend (hold); the intermediate node completes the conversion of CS signaling to SIP signaling, sends the SIP invite message, and then performs the standard codec negotiation process, the application server performs the remote leg update, and completes the voice call switching to the multimedia call. .
  • the embodiment of the invention provides a service switching method, device and system, which solve the problem that the delay is long and the user experience is relatively poor in the prior art switching process.
  • An embodiment of the present invention provides a service switching method, including:
  • the PS domain network entity receives a message carrying the service change of the terminal and the unrestricted digital information to fall back to the SCUD IF capability;
  • the PS domain network entity sends a message carrying the SCUDIF capability of the terminal to the circuit switched CS domain network side, so that the CS domain network side selects a handover procedure according to the SCUDIF capability of the terminal when performing a single wireless video call continuity handover vSRVCC .
  • An embodiment of the present invention provides a terminal, including a first processing module and a first sending module, where the first processing module is configured to add a service change of the terminal and an SCUDIF capability of the unrestricted digital information to the packet switched PS domain.
  • the first processing module is configured to add a service change of the terminal and an SCUDIF capability of the unrestricted digital information to the packet switched PS domain.
  • the first sending module is configured to send a message carrying the SCUDIF capability of the terminal to the circuit switched CS domain network side by using a PS domain network entity, so that the CS domain network side performs a single wireless video call.
  • the handover procedure is selected according to the SCUDIF capability of the terminal.
  • the embodiment of the invention further provides a PS domain network entity, including a second receiving module and a second sending module:
  • the second receiving module is configured to receive a message that carries a service change of the terminal and a capability of the unrestricted digital information to fall back to the SCUDIF;
  • the second sending module is configured to send the SCUDIF capability message of the mobile terminal to the circuit switched CS domain network side, so that the CS domain network side performs SCUDIF capability according to the terminal when performing single wireless video call continuity switching. Select the switching process.
  • the embodiment of the present invention further provides a mobile switching center server MSC Server, which includes a third receiving module and a third processing module:
  • the third receiving module is configured to receive, by the packet PS domain network entity, a message carrying a service change of the terminal and an unrestricted digital information falling back SCUDIF capability;
  • the third processing module is configured to select a handover procedure according to the SCUDIF capability of the terminal when performing a single wireless video call continuity handover.
  • the embodiment of the present invention further provides a service switching system, including a terminal and a PS domain network entity: the terminal is configured to send a message carrying the service change of the terminal and the capability of the unrestricted digital information to fall back to the SCUDIF;
  • the PS domain network entity is configured to receive a message carrying the SCUDIF capability of the terminal, and send a message carrying the SCUDIF capability of the terminal to the circuit switched CS domain network side, so that the CS domain network
  • the network side selects a handover procedure according to the SCUDIF capability of the terminal when performing a single wireless video call continuity handover.
  • the terminal transmits the SCUDIF capability of the terminal to the CS domain network side through the PS domain network entity, and the CS domain network side can subsequently select the handover process according to the SCUDIF capability of the terminal when performing single wireless video call continuity switching. Therefore, the problem that the delay in the prior art switching process is relatively long and the user experience is relatively poor is solved.
  • Embodiment 1 is a flowchart of Embodiment 1 of a service switching method according to the present invention
  • Embodiment 2 is a flowchart of Embodiment 2 of a service switching method according to the present invention
  • Embodiment 3 is a flowchart of Embodiment 3 of a service switching method according to the present invention.
  • Embodiment 4 is a flowchart of Embodiment 4 of a service switching method according to the present invention.
  • FIG. 5 is a flowchart of Embodiment 5 of a service switching method according to the present invention.
  • Embodiment 6 is a flowchart of Embodiment 6 of a service switching method according to the present invention.
  • Figure ⁇ is a schematic structural diagram of a terminal embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of an embodiment of a PS domain network entity according to the present invention.
  • 9 is a schematic structural diagram of an embodiment of an MSC Server according to the present invention.
  • FIG. 10 is a schematic structural diagram of an embodiment of a service switching system according to the present invention.
  • the terminal and the network side negotiate the SCUDIF capabilities of both parties through SETUP messages.
  • the terminal There is no process for the terminal to send SETUP in the vSRVCC mechanism, and the SCUDIF capability is the capability of the mobile phone hardware.
  • the SCUDIF capability may change after the user replaces the mobile phone, and there is no way for the network side of the existing vSRVCC mechanism to understand the SCUDIF capability of the terminal.
  • the terminal transmits the SCUDIF capability of the terminal to the CS domain network side through the PS domain network entity, and the CS domain network side can subsequently select the handover process according to the SCUDIF capability of the terminal when performing single wireless video call continuity switching. Therefore, the problem that the delay in the prior art switching process is relatively long and the user experience is relatively poor is solved.
  • the SCUDIF capability can include the following parameters:
  • the RI parameter indicates whether the service change and fallback are supported (suppor t of serv i ce change and fa ll back); BCl indicates the carrying capacity of multimedia (usually referred to as voice plus video);
  • multimedia described hereinafter generally refers to voice plus video unless otherwise specified.
  • BC2 indicates the carrying capacity of the voice
  • ENICM indicates whether Enhanced Network-initiated ICM is supported.
  • FIG. 1 is a schematic flowchart of a service switching method according to Embodiment 1 of the present invention. As shown in FIG. 1 , the service switching method in this embodiment may include the following steps:
  • Step 101 The PS domain network entity receives a message carrying the SCUDIF capability of the terminal.
  • the terminal supports SCUDIF, for example, whether the terminal supports the service change and fallback, or whether the terminal supports enhanced network-initiated I CM, which is the terminal access in the PS. a related ability.
  • the terminal makes an Attach request or a tracking area update (TAU) request in the PS access, it carries the "UE Core Network Capabi 1 ty", which includes the terminal network of "MS Network Capability". Capability parameter.
  • the embodiment of the present invention may adopt the SCUDIF capability of the terminal in the "MS Network Capability" parameter. That is, the RIS parameter indicating whether the support of the service change and the fal lback is supported in the "MS Network Capability" parameter may optionally carry the BC1 parameter indicating the bearer capability of the multimedia, or carry the indication voice.
  • Step 102 The PS domain network entity sends a message carrying the SCUDIF capability of the terminal to the CS domain network side, so that the CS domain network side selects a handover procedure according to the SCUD I F capability of the terminal when performing a single wireless video call continuity handover.
  • the PS domain network entity can transmit the SCUD I F capability of the terminal to the CS domain network side through the Sv interface.
  • the PS domain network entity may include a Mob i le Management Entity (MME) or a Serving GPRS Supper Node (SGSN).
  • MME Mob i le Management Entity
  • SGSN Serving GPRS Supper Node
  • the MME or the SGSN can transmit the SCUD I F capability of the terminal to the Mobi le Swi tching Center Server (MSC Server) on the network side of the CS domain through the S v interface.
  • MSC Server Mobi le Swi tching Center Server
  • Subsequent MSC Server can select different vSRVCC handover procedures according to different SCUDIF capabilities of the terminal.
  • the terminal transmits the SCUDIF capability of the terminal to the CS domain network side through the PS domain network entity, and the CS domain network side can select the handover process according to the SCUDIF capability of the terminal when performing the single wireless video call continuity switching.
  • FIG. 2 is a schematic flowchart of a service switching method according to Embodiment 2 of the present invention.
  • the process for the terminal to report the SCUD I F capability by attaching (A U a ch) is as follows:
  • Step 201 The terminal transmits the SCUDIF capability of the terminal to the eNodeB in the attach request message.
  • the terminal transmits the SCUDIF capability of the terminal to the CS domain network side through the PS domain network entity in the attach request message, and the CS domain network side can subsequently perform the single wireless video call continuity switch according to the SCUDIF capability of the terminal.
  • the handover process is selected, thereby solving the problem that the delay in the prior art handover process is relatively long and the user experience is relatively poor.
  • FIG. 3 is a schematic flowchart of a service switching method according to Embodiment 3 of the present invention.
  • the process for the terminal to report the SCUDIF capability by using the tracing area upda te (TAU) is as follows: Step 301: The terminal updates the request in the tracking area. Passing the SCUDIF capability of the terminal to the eNodeB in the message;
  • Step 302 The eNodeB passes the SCUDIF capability of the terminal to the tracking area update request message.
  • Step 303 The MME transmits the SCUDIF capability of the terminal to the MSC Server through an interface with the MSC Server, and the MSC Server may select a handover procedure according to the S CUD I F capability of the terminal when performing a single wireless video call continuity handover.
  • the terminal transmits the SCUDIF capability of the terminal to the CS domain network side through the PS domain network entity in the tracking area update request message, and the CS domain network side subsequently performs a single wireless video.
  • the handover process can be selected according to the SCUDIF capability of the terminal, thereby solving the problem that the delay in the prior art handover process is relatively long and the user experience is relatively poor.
  • FIG. 4 is a schematic flowchart of a service switching method according to Embodiment 4 of the present invention.
  • the service switching method in this embodiment may include steps in addition to steps 101 and 102 in Embodiment 1, and may include the following steps:
  • the PS domain network entity receives the SCUD I F capability of the CS domain network entity.
  • the MSC Server passes its SCUDIF capability to the interface between the E and E.
  • the PS domain network entity sends the SCUD I F capability of the CS domain network entity to the terminal.
  • the MME sends the SCUDIF capability of the MSC Server to the terminal.
  • the MME of the PS domain network entity may carry the SCUDIF capability of the MSC Server in the initial context setup request Ini t ia 1 Context Setup Reques t, that is, carry the indication in the Ini tial Context Setup Reques t whether to support the service change and fall back.
  • the RI parameter of the suppor t of servi ce change and fa lback may optionally carry a BC1 parameter indicating the bearer capability of the multimedia, or a BC2 parameter carrying the bearer capability indicating the voice, or carrying a network indicating whether the enhanced support is supported.
  • the EN I CM parameter of the Enhanced Network-initiated I CM is initiated.
  • the SCUDIF capability is exchanged between the terminal and the MSC Server through the PS domain network entity, and the CS domain network side can select the handover process according to the SCUDIF capability of the terminal when performing the single wireless video call continuity switching.
  • Delay ratio in prior art switching process Longer, less user experience.
  • the CS domain network side can select the appropriate handover procedure according to the SCUD I F capability of the terminal. If both the terminal and the MSC Server support SCUDIF, as shown in FIG. 5 .
  • FIG. 5 is a schematic flowchart of a service switching method according to Embodiment 5 of the present invention.
  • SRVCC Single Radio Voice Call Continuity
  • steps 501 to 505 the voice call can be made, but the video call is temporarily unavailable.
  • the subsequent terminal performs the H.245 negotiation between the terminal and the MSC Server by sending a MODIFY message, and after the H.245 negotiation is completed, the MSC Server instructs to update the far leg. See the steps below for details:
  • the multimedia call in the IMS domain is in progress, and the terminal UE accesses the PS network through an Evolved Universal Terrestrial Radio Access Network (E-UTRAN).
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • the E-UTRAN indicates to the MSC Server to perform a vSRVCC handover.
  • the two parties of the call make a voice call.
  • the terminal uses the SCUDIF mechanism to perform service change. Specifically, the terminal sends a MODIFY message to the MSC Server to modify the bearer capability from voice to multimedia, and subsequently performs H.245 negotiation on the multimedia bearer. 507. After completing the H.245 negotiation, the MSC Server indicates to the Service Centralization and Continuity Application Server (SCC AS).
  • SCC AS Service Centralization and Continuity Application Server
  • the SCC AS performs a process of updating the distal leg.
  • the SCC AS responds to the indication message of step 507.
  • the multimedia session is in progress.
  • the CS domain network side can select an appropriate handover procedure according to the SCUD IF capability of the terminal. If one of the terminal and the MSC Server does not support SCUDIF, or does not support SCUDIF, that is, at least one of the terminal and the MSC Server does not support SCUDIF, then As shown in Figure 6.
  • FIG. 6 is a schematic flowchart of a service switching method according to Embodiment 6 of the present invention. If the terminal only supports voice bearer capability, a normal voice SRVCC process is performed.
  • the switching process of the video and voice simultaneous handover is performed, that is, the multimedia bearer capability is switched to the destination CS network, and then the H.245 negotiation is performed between the terminal and the MSC Server to complete the multimedia session connection. See the steps below for details:
  • the multimedia call of the IMS domain is in progress, and the terminal UE accesses the PS network through the E-UTRAN.
  • the E-UTRAN indicates to the MSC Server to perform a vSRVCC handover.
  • the handover is not a voice bearer, but a multimedia (voice plus video) bearer.
  • the MSC Server After completing the H.245 negotiation, the MSC Server indicates to the SCC AS.
  • the SCC AS performs a process of updating the remote leg.
  • the SCC AS responds to the indication message of step 607.
  • the multimedia session is in progress.
  • FIG. 7 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
  • the terminal in this embodiment includes: a first processing module 11 and a first sending module 12.
  • the first processing module 11 is configured to add the SCUDIF capability of the terminal to the message sent to the PS domain network entity, where the terminal supports the SCUDIF, for example, whether the terminal supports the service change and fallback. Or whether the terminal supports Enhanced Network-initiated I CM is a related capability of the terminal to access the PS.
  • the terminal makes an Attach request or a tracking area update (TAU) request
  • the terminal carries the "UE Core Network Capability", which includes the "MS Network Capability" terminal network capability parameter.
  • the first processing module 11 may adopt the SCUDIF capability of the terminal in the "MS Network Capability" parameter. That is, the MSC parameter indicating the support of the service change and the fallback is carried in the "MS Network Capability" parameter, and optionally, the BC1 parameter indicating the bearer capability of the multimedia, or carrying the bearer indicating the voice may be carried. Capability of the BC2 parameter, or carrying a network indication indicating whether enhanced support is supported The EN I CM parameter of the Enhanced Network-ini ted ed I CM.
  • the first sending module 12 is configured to send the SCUDIF capable message of the carrying terminal to the CS domain network side through the PS domain network entity, so that the CS domain network side performs SCUDIF according to the terminal when performing single wireless video call continuity switching.
  • Ability selection switching process
  • the PS domain network entity may specifically include an MME or an SGSN.
  • the network entity on the CS domain network side may include an MSC Server.
  • the first processing module 11 of the terminal adds the SCUD IF capability of the terminal to the message sent to the PS domain network entity, and the first sending module 12 sends the SCUD IF capability message carrying the terminal through the PS domain network entity.
  • the CS domain network side is configured to enable the CS domain network side to select a suitable handover procedure according to the SCUDIF capability of the terminal when performing a single wireless video call continuity handover, thereby solving the long delay in the prior art handover process, and comparing the user experience. Poor question.
  • FIG. 8 is a schematic structural diagram of an embodiment of a PS domain network entity according to the present invention.
  • the PS domain network entity in this embodiment includes: a second receiving module 21 and a second sending module 22.
  • the second receiving module 21 is configured to receive a message carrying the SCUDIF capability of the terminal, where the terminal supports the SCUDIF, for example, whether the terminal supports the service change and the fallback (suppor t of servi ce change and fa lback), or whether the terminal supports Enhanced Network-initiated call modification (Enhanced Network-initiated I CM) is a related capability of the terminal to access the PS.
  • Enhanced Network-initiated I CM Enhanced Network-initiated call modification
  • the terminal When the terminal is attached in the PS access (At tach) When requesting or performing a tracking area update (TAU) request, it carries "UE Core Network Capability", which contains the terminal network capability parameter of "MS Network Capability".
  • the embodiment of the present invention may adopt the SCUDIF capability of the terminal in the "MS Network Capability" parameter.
  • the RI parameter indicating the support of the service change and the fallback is carried, and optionally, the BC1 parameter indicating the bearer capability of the multimedia, or carrying the bearer indicating the voice may be carried.
  • the BC2 parameter of the capability or carries an EN I CM parameter indicating whether Enhanced Network-initiated I CM is supported.
  • the second sending module 22 is configured to send a message carrying the SCUDIF capability of the terminal to the CS domain network side, so that the CS domain network side selects a handover procedure according to the SCUDIF capability of the terminal when performing single wireless video call continuity switching.
  • the second receiving module 21 is further configured to receive the SCUDIF capability of the CS domain network entity.
  • the second sending module 22 is further configured to: use the initial context to establish the SCUDIF capability of the CS domain entity in the Initial Context Setup Request. Send to the terminal.
  • the PS domain network entity may specifically include an MME or an SGSN.
  • the network entity on the CS domain network side may include an MSC Server.
  • the second receiving module 21 of the PS domain network entity receives the mobile terminal by using the second receiving module 21 of the PS domain network entity.
  • the message of the SCUD IF capability, the second sending module 22 sends a message carrying the SCUD IF capability of the terminal to the CS domain network side, so that the CS domain network side selects according to the SCUDIF capability of the terminal when performing single wireless video call continuity switching.
  • the switching process solves the problem that the delay in the prior art switching process is long and the user experience is relatively poor.
  • FIG. 9 is a schematic structural diagram of an embodiment of a mobile switching center server MSC Server according to the present invention.
  • the mobile switching center server MSC Server of this embodiment includes: a third receiving module 31 and a third processing module 32.
  • the third receiving module 31 is configured to receive, by using a packet PS domain network entity, a message carrying a service change of the terminal and an unrestricted digital information falling back SCUD I F capability;
  • the third processing module 32 is configured to select a handover procedure according to the SCUDIF capability of the terminal when performing a single wireless video call continuity handover.
  • the third processing module 32 is configured to select a handover process according to the SCUDIF capability of the terminal when performing a single wireless video call continuity handover, including:
  • both the terminal and the MSC Server support SCUDIF, a single wireless voice call continuity SRVCC process is first performed, and then the terminal sends a MODIFY message to the MSC Server to modify the bearer capability from voice to multimedia, and performs H. 245 on the multimedia bearer.
  • a single wireless voice call continuity SRVCC process is first performed, and then the terminal sends a MODIFY message to the MSC Server to modify the bearer capability from voice to multimedia, and performs H. 245 on the multimedia bearer.
  • the terminal and the MSC Server does not support the SCUDIF, if the terminal supports the multimedia bearer capability, the terminal is switched to the destination CS network according to the multimedia bearer capability, and then the H.245 negotiation is performed between the terminal and the MSC Server to complete the multimedia session connection.
  • the embodiment of the present invention uses the third receiving module 31 to receive, by the packet PS domain network entity, a message carrying the service change of the terminal and the capability of the unrestricted digital information to fall back to the SCUDIF; the third processing module 32 performs the switching of the continuity of the single wireless video call according to the third receiving module 32.
  • the SCUDIF capability selection switching process of the terminal solves the problem that the delay in the prior art handover process is relatively long and the user experience is relatively poor.
  • FIG. 10 is a schematic structural diagram of an embodiment of a service switching system according to the present invention.
  • the service switching system in this embodiment includes: a terminal 1 and a PS domain network entity 2.
  • the terminal 1 is configured to send a message carrying the SCUDIF capability of the terminal;
  • the PS domain network entity 2 is configured to receive a message carrying the SCUDIF capability of the terminal, and send a message carrying the SCUDIF capability of the terminal to the CS domain network side, so that
  • the CS domain network side selects a handover procedure according to the SCUDIF capability of the terminal when performing a single wireless video call continuity handover.
  • the PS network entity is further configured to receive the SCUDIF capability of the CS domain network entity, and then send the SCUDIF capability of the CS domain network entity in the Initiation context to the terminal by using an initial context setup request in the Ini tia Context Se tup Reques t.
  • the CS domain network side includes a mobile switching center server MSC Server, and the CS domain network side selects a handover procedure according to the SCUDIF capability of the terminal when performing a single wireless video call continuity handover, including:
  • a single wireless voice call continuity SRVCC procedure is first performed, and then the terminal sends a MODIFY message to the MSC Server to carry the capability. Modifyed by voice into multimedia, H. 245 negotiation on the multimedia bearer; or
  • the terminal and the MSC Server does not support the SCUDIF, if the terminal supports the multimedia bearer capability, the UE is switched to the destination CS network according to the multimedia bearer capability, and then the H.245 negotiation is performed between the terminal and the MSC Server to complete the multimedia session connection.
  • the terminal transmits the SCUDIF capability to the CS domain network side through the PS domain network entity, and the CS domain network side can select the handover process according to the SCUDIF capability of the terminal when performing the single wireless video call continuity switching.
  • the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed.
  • the steps of the foregoing method embodiments are included; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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Description

业务切换方法、 装置及系统
技术领域
本发明涉及通信技术领域, 尤其涉及一种业务切换方法、 装置及系统。 背景技术
IP多媒体子系统(IP Multimedia Subsystem, IMS)是支持 IP多媒体业务 的子系统, 是电信下一代核心网, 与接入技术无关的核心网。 IMS基于会话初 始化协议 ( Session Initiation Protocol, SIP ), 使用 SIP呼叫控制机制来 创建、 管理和终结各种类型的多媒体业务。
单一无线视频呼叫连续性 ( video Single Radio Voice Call Continuity, vSRVCC )是第三代合作伙伴计划 ( 3rd Generation Partnership Project , 3GPP )研究的单一无线视频呼叫连续性可行性的项目,是将 IMS视频通话从分 组交换 ( Packet Switched, PS)接入切换到电路交换 (Circuit Switching, CS)接入的一种切换技术。
vSRVCC是业务连续性的一种, 要考虑视频加语音的同时切换。 现有技术 中 vSRVCC切换先进行语音呼叫切换,执行远端腿的更新,从而建立了 CS语音 呼叫承载; 然后终端发起新的 SETUP消息, 和网络之间建立新的多媒体呼叫承 载, CS语音呼叫被挂起(hold); 中间节点完成 CS信令到 SIP信令的转化, 发送 SIP的 invite消息, 然后执行标准的 codec协商过程, 应用服务器进行 远端腿的更新, 完成了语音呼叫切换到多媒体呼叫。 发明人发现现有技术存在如下问题: 语音呼叫切换完成后, 建立的 CS语 音呼叫承载立即被挂起(hold),然后终端和网络之间重新开始通过 SETUP消息 建立新的多媒体呼叫承载, 所以最初的 CS语音呼叫承载一直没有被使用, 直 到被新建立的呼叫替代。 因此该方案是完全重新协商的方案,切换过程中时延 比较长, 用户体验比较差。
发明内容
本发明实施例提供一种业务切换方法、 装置及系统, 以解决现有技术切 换过程中时延比较长, 用户体验比较差的问题。
本发明实施例提供一种业务切换方法, 包括:
分组交换 PS域网络实体接收携带终端的业务改变和不受限数字信息回落 SCUD IF能力的消息;
PS域网络实体将携带所述终端的 SCUDIF能力的消息发送给电路交换 CS 域网络侧,以使 CS域网络侧在进行单一无线视频呼叫连续性切换 vSRVCC时根 据所述终端的 SCUDIF能力选择切换流程。
本发明实施例提供一种终端, 包括第一处理模块和第一发送模块: 所述第一处理模块用于将终端的业务改变和不受限数字信息回落 SCUDIF 能力添加到发送给分组交换 P S域网络实体的消息中;
所述第一发送模块用于将携带所述终端的 SCUDIF能力的消息通过 PS域网 络实体发送给电路交换 CS域网络侧,以使 CS域网络侧在进行单一无线视频呼 叫连续性切换时根据所述终端的 SCUDIF能力选择切换流程。
本发明实施例还提供一种 PS域网络实体, 包括第二接收模块和第二发送 模块:
所述第二接收模块用于接收携带终端的业务改变和不受限数字信息回落 SCUDIF能力的消息;
所述第二发送模块用于将所述携带终端的 SCUDIF能力的消息发送给电路 交换 CS域网络侧,以使 CS域网络侧在进行单一无线视频呼叫连续性切换时根 据所述终端的 SCUDIF能力选择切换流程。
本发明实施例还提供一种移动交换中心服务器 MSC Server , 包括第三接 收模块和第三处理模块:
所述第三接收模块用于通过分组 PS域网络实体接收携带终端的业务改变 和不受限数字信息回落 SCUDIF能力的消息;
所述第三处理模块用于在进行单一无线视频呼叫连续性切换时根据所述 终端的 SCUDIF能力选择切换流程。
本发明实施例还提供一种业务切换系统, 包括终端和 PS域网络实体: 所述终端用于发送携带所述终端的业务改变和不受限数字信息回落 SCUDIF能力的消息;
所述 PS域网络实体用于接收携带所述终端的 SCUDIF能力的消息,并将携 带所述终端的 SCUDIF能力的消息发送给电路交换 CS域网络侧, 以使 CS域网 络侧在进行单一无线视频呼叫连续性切换时根据所述终端的 SCUDIF能力选择 切换流程。
本发明实施例采用终端通过 PS域网络实体络将终端自身的 SCUDIF能力传 递给 CS域网络侧, CS域网络侧后续在进行单一无线视频呼叫连续性切换时可 以根据该终端的 SCUDIF能力选择切换流程, 从而解决了现有技术切换过程中 时延比较长, 用户体验比较差的问题。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施 例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地, 下面描述 中的附图是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创 造性劳动性的前提下, 还可以根据这些附图获得其他的附图。
图 1为本发明业务切换方法实施例一的流程图;
图 2为本发明业务切换方法实施例二的流程图;
图 3为本发明业务切换方法实施例三的流程图;
图 4为本发明业务切换方法实施例四的流程图;
图 5为本发明业务切换方法实施例五的流程图;
图 6为本发明业务切换方法实施例六的流程图;
图 Ί为本发明终端实施例的结构示意图;
图 8为本发明 PS域网络实体实施例的结构示意图; 图 9为本发明 MSC Server实施例的结构示意图;
图 10为本发明业务切换系统实施例的结构示意图。
具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清 楚、 完整地描述, 显然, 所描述的实施例仅是本发明一部分实施例, 而不是全 部的实施例。基于本发明中的实施例, 本领域普通技术人员在没有做出创造性 劳动前提下所获得的所有其他实施例, 都属于本发明保护的范围。
按照业务改变和不受限数字信息回落( Servi ce Change and UDI Fa l l back , SCUDIF )的已有机制,终端与网络侧之间通过 SETUP消息来协商双方的 SCUDIF 能力。 vSRVCC机制中并没有终端发送 SETUP的过程, 而 SCUDIF能力是手机硬 件的能力, 用户更换手机后 SCUDIF能力可能改变, 而在现有 vSRVCC机制下网 络侧没有途径了解终端的 SCUDIF能力。
本发明实施例采用终端通过 PS域网络实体络将终端自身的 SCUDIF能力传 递给 CS域网络侧, CS域网络侧后续在进行单一无线视频呼叫连续性切换时可 以根据该终端的 SCUDIF能力选择切换流程, 从而解决了现有技术切换过程中 时延比较长, 用户体验比较差的问题。
SCUDIF能力可以包括如下参数:
RI 参数指示是否支持业务改变和回落 (suppor t of serv i ce change and fa l l back); BCl指示多媒体(通常指语音加视频) 的承载能力;
另外, 下文中所述的多媒体, 除非特别指明, 通常都是指语音加视频。
BC2指示语音的承载能力;
ENICM 指示是否支持增强的 网络发起呼叫 中修改 (Enhanced Network-initiated ICM)。
图 1为本发明实施例一提供的一种业务切换方法的流程示意图, 如图 1所 示, 本实施例业务切换方法可以包括以下步骤:
步骤 101、 PS域网络实体接收携带终端的 SCUDIF能力的消息;
其中终端是否支持 SCUDIF,比如说终端是否支持业务改变和回落(support of service change and fallback) , 或者终端是否支持增强的网络发起呼叫 中修改(Enhanced Network-initiated I CM) , 是终端在 PS接入的一种相关能 力。 当终端在 PS接入进行附着(Attach)请求或者进行跟踪区更新( tracking area update, TAU)请求时, 会携带 "UE Core Network Capabi 1 i ty" , 其中 包含了 "MS Network Capability" 这个终端网络能力参数。 本发明实施例可 以采用在 "MS Network Capability"参数中携带终端的 SCUDIF能力。 即在 "MS Network Capability" 参数中携带指示是否支持业务改变和回落(support of service change and fal lback)的 RI参数, 可选的还可以携带指示多媒体的承 载能力的 BC1参数,或者携带指示语音的承载能力的 BC2参数,或者携带指示是 否支持增强的网洛发起呼叫中修改(Enhanced Network-initiated I CM)的 EN I CM参数。
步骤 102、 PS域网络实体将携带终端的 SCUDIF能力的消息发送给 CS域网络 侧, 以使 CS域网络侧在进行单一无线视频呼叫连续性切换时根据该终端的 SCUD I F能力选择切换流程。
具体的, PS域网络实体获得终端的 SCUDIF能力后, 可以通过 Sv接口将终端 的 SCUD I F能力传递给 CS域网络侧。
更具体的, PS域网络实体可以包括移动管理实体 (Mob i le Management Ent i ty, MME )或者 GPRS业务支撑节点( Serving GPRS Suppor t Node , SGSN )。 MME或 SGSN获得终端的 SCUD I F能力后, 可以通过 S v接口将终端的 SCUD I F能力传 递给 CS域网络侧的移动交换中心服务器 ( Mobi le Swi tching Center Server , MSC Server ) 。 后续 MSC Server可以才艮据终端的不同 SCUDIF能力选择不同的 vSRVCC切换流程。
本发明实施例采用终端通过 PS域网络实体将终端自身 SCUDIF能力传递给 CS域网络侧, CS域网络侧后续在进行单一无线视频呼叫连续性切换时可以根 据该终端的 SCUDIF能力选择切换流程,从而解决了现有技术切换过程中时延比 较长, 用户体验比较差的问题。
图 2为本发明实施例二提供的一种业务切换方法的流程示意图, 终端通过 附着(A U a ch)请求上报 SCUD I F能力的流程如下:
步骤 201、 终端在附着请求消息中将终端的 SCUDIF能力传递给 eNodeB; 步骤 202、 eNodeB在附着请求消息中将终端的 SCUDIF能力传递给 MME; 步骤 203、丽 E通过与 MSC Server之间的接口将终端的 SCUDIF相关能力传递 给 MSC Server , MSC Server后续在进行单一无线视频呼叫连续性切换时可以根 据该终端的 SCUD I F能力选择切换流程。
本发明实施例采用终端在附着请求消息中通过 PS域网络实体将终端自身 SCUDIF能力传递给 CS域网络侧, CS域网络侧后续在进行单一无线视频呼叫连 续性切换时可以根据该终端的 SCUDIF能力选择切换流程,从而解决了现有技术 切换过程中时延比较长, 用户体验比较差的问题。
图 3为本发明实施例三提供的一种业务切换方法的流程示意图, 终端通过 跟踪区更新 ( t racking area upda te , TAU )请求上报 SCUDIF能力的流程如下: 步骤 301、 终端在跟踪区更新请求消息中将终端的 S C U D I F能力传递给 eNodeB;
步骤 302、 eNodeB在跟踪区更新请求消息中将终端的 SCUDIF能力传递给
MME;
步骤 303、 MME通过与 MSC Server之间的接口将终端的 SCUDIF能力传递给 MSC Server , MSC Server后续在进行单一无线视频呼叫连续性切换时可以根据 该终端的 S CUD I F能力选择切换流程。
本发明实施例采用终端在跟踪区更新请求消息中通过 PS域网络实体将终 端自身 SCUDIF能力传递给 CS域网络侧, CS域网络侧后续在进行单一无线视频 呼叫连续性切换时可以根据该终端的 SCUDIF能力选择切换流程,从而解决了现 有技术切换过程中时延比较长, 用户体验比较差的问题。
图 4为本发明实施例四提供的一种业务切换方法的流程示意图, 如图 4所 示,本实施例业务切换方法除了包括实施例一中的步骤 101和 102外,还可以包 括步骤:
403、 PS域网络实体接收 CS域网络实体的 SCUD I F能力;
具体地, MSC Server将自身的 SCUDIF能力通过与丽 E之间的接口传递给
MME。
404、 PS域网络实体将 CS域网络实体的 SCUD I F能力发送给终端。
具体地, MME将 MSC Server的 SCUDIF能力发送给终端。
更具体地, PS域网络实体的丽 E可以在初始上下文建立请求 Ini t ia 1 Context Setup Reques t中携带 MSC Server的 SCUDIF能力,即在 Ini t i a l Context Setup Reques t中携带指示是否支持业务改变和回落(suppor t of servi ce change and fa l lback)的 RI参数, 可选的还可以携带指示多媒体的承载能力的 BC1参数, 或者携带指示语音的承载能力的 BC2参数,或者携带指示是否支持增 强的网络发起呼叫中修改(Enhanced Network-ini t ia ted I CM)的 EN I CM参数。
本发明实施例采用终端和 MSC Server之间通过 PS域网络实体进行 SCUDIF 能力的交换, CS域网络侧后续在进行单一无线视频呼叫连续性切换时可以根 据该终端的 SCUDIF能力选择切换流程,从而解决了现有技术切换过程中时延比 较长, 用户体验比较差的问题。
CS域网络侧可以根据终端的 SCUD I F能力选择合适的切换流程,如果终端和 MSC Server都支持 SCUDIF, 则如图 5所示。
图 5为本发明实施例五提供的一种业务切换方法的流程示意图。 先进行单 一无线语音呼叫连续性(Single Radio Voice Call Continuity, SRVCC )过程, 如下图中的步骤 501到 505。 SRVCC过程完成后, 语音通话可以进行, 但是视频 通话暂时不通。后续终端通过发送 MODIFY消息进行^载能力改变, 然后在终端 和 MSC Server之间进行 H.245协商, H.245协商完成后, MSC Server指示更新远 端腿。 具体参见下面的步骤:
501、 IMS域的多媒体呼叫进行中, 终端 UE通过演进的通用陆基无线接入网 ( Evolved Universal Terrestrial Radio Access Network, E-UTRAN )接入 PS网络。
502、 E- UTRAN向 MSC Server指示进行 vSRVCC切换。
503、 标准的语音 SRVCC过程。 具体过程不再详述。
504、 更新远端腿。
505、 通话双方进行语音通话。
506、 终端利用 SCUDIF机制进行业务改变, 具体来说, 终端向 MSC Server 发送 MODIFY消息将承载能力由语音修改成多媒体,后续,在多媒体承载上进行 H.245协商。 507、 完成了 H.245协商后 MSC Server向业务集中和连续应用服务器 ( Service Centralization and Continuity Application Server , SCC AS) 指示。
508、 SCC AS进行更新远端腿的过程。
509、 SCC AS对步骤 507的指示消息进行应答。
510、 多媒体会话进行中。
CS域网络侧可以根据终端的 SCUD I F能力选择合适的切换流程,如果终端和 MSC Server其中之一不支持 SCUDIF,或者都不支持 SCUDIF,也就是说终端和 MSC Server至少之一不支持 SCUDIF, 则如图 6所示。
图 6为本发明实施例六提供的一种业务切换方法的流程示意图, 如果终端 只支持语音承载能力, 则进行正常的语音 SRVCC过程。
如果终端支持多媒体承载能力, 则进行视频加语音同时切换的切换过程, 即按照多媒体承载能力切换到目的 CS网络, 后续在终端与 MSC Server之间进行 H.245协商, 完成多媒体会话连接。 具体参见下面的步骤:
601、 IMS域的多媒体呼叫进行中, 终端 UE通过 E-UTRAN接入 PS网络。
602、 E- UTRAN向 MSC Server指示进行 vSRVCC切换。
603、 SRVCC过程, 切换的不是语音承载, 而是多媒体(语音加视频)承载。
604、 更新远端腿。
605、 虽然建立了多媒体承载, 但是因为 H.245协商还没有完成, 所以语音 和视频都不通。
606、 终端和 MSC Server之间进行 H.245协商。
607、 完成了 H.245协商后 MSC Server向 SCC AS指示。
608、 SCC AS进行更新远端腿的过程。
609、 SCC AS对步骤 607的指示消息进行应答。
610、 多媒体会话进行中。
图 7为本发明终端实施例的结构示意图,如图 7所示,本实施例的终端包括: 第一处理模块 11和第一发送模块 12。所述第一处理模块 11用于将终端的 SCUDIF 能力添加到发送给 PS域网络实体的消息中, 其中终端是否支持 SCUDIF, 比如说 终端是否支持业务改变和回落 (support of service change and fallback) , 或者终端是否支持增强的网络发起呼叫中修改(Enhanced Network-initiated I CM) , 是终端在 PS接入的一种相关能力。 当终端在 PS接入进行附着 (Attach) 请求或者进行跟踪区更新( tracking area update, TAU)请求时, 会携带 "UE Core Network Capability" , 其中包含了 "MS Network Capability" 这个终 端网络能力参数。 本发明实施例中第一处理模块 11可以采用在 "MS Network Capability" 参数中携带终端的 SCUDIF能力。 即在 "MS Network Capability" 参数中携带指示是否支持业务改变和回落(support of service change and fallback)的 RI参数, 可选的还可以携带指示多媒体的承载能力的 BC1参数,或 者携带指示语音的承载能力的 BC2参数, 或者携带指示是否支持增强的网络发 起呼叫中修改(Enhanced Network-ini t i a ted I CM)的 EN I CM参数。
所述第一发送模块 12用于将携带终端的 SCUDIF能力的消息通过 PS域网 络实体发送给 CS域网络侧,以使 CS域网络侧在进行单一无线视频呼叫连续性 切换时根据该终端的 SCUDIF能力选择切换流程。
其中 PS域网络实体具体可以包括 MME或者 SGSN。 CS域网络侧的网络实体 可以包括 MSC Server。
上述实施例中各个模块和单元的工作流程和工作原理参见上述各方法实 施例中的描述, 在此不再赘述。
本发明实施例采用终端的第一处理模块 11将终端的 SCUD I F能力添加到发 送给 P S域网络实体的消息中,第一发送模块 12将携带终端的 SCUD I F能力的消息 通过 PS域网络实体发送给 CS域网络侧,以使 CS域网络侧在进行单一无线视频呼 叫连续性切换时根据终端的 SCUDIF能力选择合适的切换流程,从而解决了现有 技术切换过程中时延比较长, 用户体验比较差的问题。
图 8为本发明 PS域网络实体实施例的结构示意图,如图 8所示, 本实施例的 PS域网络实体包括: 第二接收模块 21和第二发送模块 22。 所述第二接收模块 21 用于接收携带终端的 SCUDIF能力的消息, 其中终端是否支持 SCUDIF, 比如说终 端是否支持业务改变和回落 (suppor t of servi ce change and fa l lback) , 或 者终端是否支持增强的网络发起呼叫中修改(Enhanced Network-ini t ia ted I CM) , 是终端在 PS接入的一种相关能力。 当终端在 PS接入进行附着 (At tach ) 请求或者进行跟踪区更新( tracking area update, TAU)请求时, 会携带 "UE Core Network Capability" , 其中包含了 "MS Network Capability" 这个终 端网络能力参数。 本发明实施例可以采用在 "MS Network Capability" 参数 中携带终端的 SCUDIF能力。 即在 "MS Network Capability" 参数中携带指示 是否支持业务改变和回落 (support of service change and fallback)的 RI 参数, 可选的还可以携带指示多媒体的承载能力的 BC1参数, 或者携带指示语 音的承载能力的 BC2参数, 或者携带指示是否支持增强的网络发起呼叫中修改 (Enhanced Network-initiated I CM)的 EN I CM参数。
所述第二发送模块 22用于将携带终端的 SCUDIF能力的消息发送给 CS域 网络侧, 以使 CS域网络侧在进行单一无线视频呼叫连续性切换时根据该终端 的 SCUDIF能力选择切换流程。
所述第二接收模块 21还用于接收 CS域网络实体的 SCUDIF能力; 所述第 二发送模块 22 还用于通过初始上下文建立清求 Initial Context Setup Request中携带所述 CS域网络实体的 SCUDIF能力发送给所述终端。
其中 PS域网络实体具体可以包括 MME或者 SGSN。 CS域网络侧的网络实体 可以包括 MSC Server。
上述实施例中各个模块和单元的工作流程和工作原理参见上述各方法实 施例中的描述, 在此不再赘述。
本发明实施例采用 PS域网络实体的第二接收模块 21接收携带终端的 SCUD I F能力的消息,第二发送模块 22将携带终端的 SCUD I F能力的消息发送给 C S 域网络侧,以使 CS域网络侧在进行单一无线视频呼叫连续性切换时根据该终端 的 SCUDIF能力选择切换流程,从而解决了现有技术切换过程中时延比较长, 用 户体验比较差的问题。
图 9为本发明移动交换中心服务器 MSC Server实施例的结构示意图, 如图 9 所示, 本实施例的移动交换中心服务器 MSC Server包括: 第三接收模块 31和第 三处理模块 32。
所述第三接收模块 31用于通过分组 PS域网络实体接收携带终端的业务改 变和不受限数字信息回落 SCUD I F能力的消息;
所述第三处理模块 32用于在进行单一无线视频呼叫连续性切换时根据所 述终端的 SCUDIF能力选择切换流程。
该第三处理模块 32用于在进行单一无线视频呼叫连续性切换时根据所述 终端的 SCUDIF能力选择切换流程包括:
如果终端和 MSC Server都支持 SCUDIF , 则先进行单一无线语音呼叫连续 性 SRVCC过程, 然后所述终端向所述 MSC Server发送 MODIFY消息将承载能力 由语音修改成多媒体, 在多媒体承载上进行 H. 245协商; 或
如果终端和 MSC Server至少其中之一不支持 SCUDIF,如果终端支持多媒 体承载能力, 则按照多媒体承载能力切换到目的 CS 网络, 然后在终端与 MSC Server之间进行 H. 245协商, 完成多媒体会话连接。 上述实施例中各个模块和单元的工作流程和工作原理参见上述各方法实 施例中的描述, 在此不再赘述。
本发明实施例采用第三接收模块 31通过分组 PS域网络实体接收携带终端 的业务改变和不受限数字信息回落 SCUDIF能力的消息;第三处理模块 32在进行 单一无线视频呼叫连续性切换时根据所述终端的 SCUDIF能力选择切换流程,从 而解决了现有技术切换过程中时延比较长, 用户体验比较差的问题。
图 10为本发明业务切换系统一个实施例的结构示意图,如图 10所示, 本 实施例的业务切换系统包括: 终端 1和 PS域网络实体 2。 其中终端 1用于发 送携带所述终端的 SCUDIF能力的消息; PS域网络实体 2用于接收携带终端的 SCUDIF能力的消息, 并将携带终端的 SCUDIF能力的消息发送给 CS域网络侧, 以使 CS域网络侧在进行单一无线视频呼叫连续性切换时根据该终端的 SCUDIF 能力选择切换流程。 PS网络实体还用于接收 CS域网络实体的 SCUDIF能力, 然后通过初始上下文建立清求 Ini t ia l Context Se tup Reques t 中携带所述 CS域网络实体的 SCUDIF能力发送给所述终端。
CS域网络侧包括移动交换中心服务器 MSC Server , 所述 CS域网络侧在进 行单一无线视频呼叫连续性切换时根据所述终端的 SCUDIF能力选择切换流程 包括:
如果终端和 MSC Server都支持 SCUDIF , 则先进行单一无线语音呼叫连续 性 SRVCC过程, 然后所述终端向所述 MSC Server发送 MODIFY消息将承载能力 由语音修改成多媒体, 在多媒体承载上进行 H. 245协商; 或
如果终端和 MSC Server至少其中之一不支持 SCUDIF,如果终端支持多媒 体承载能力, 则按照多媒体承载能力切换到目的 CS 网络, 然后在终端与 MSC Server之间进行 H. 245协商, 完成多媒体会话连接。
上述系统实施例各个模块和单元的工作流程和工作原理参见上述各方法 实施例中的描述, 在此不再赘述。
上述系统实施例中, 终端通过 PS域网络实体将自身 SCUDIF能力传递给 CS域网络侧, CS域网络侧后续在进行单一无线视频呼叫连续性切换时可以根 据该终端的 SCUDIF能力选择切换流程, 从而解决了现有技术切换过程中时延 比较长, 用户体验比较差的问题。
本领域普通技术人员可以理解:实现上述方法实施例的全部或部分步骤可 以通过程序指令相关的硬件来完成,前述的程序可以存储于一计算机可读取存 储介质中, 该程序在执行时, 执行包括上述方法实施例的步骤; 而前述的存储 介质包括: R0M、 RAM, 磁碟或者光盘等各种可以存储程序代码的介质。
最后应说明的是: 以上实施例仅用以说明本发明的技术方案, 而非对其限 制; 尽管参照前述实施例对本发明进行了详细的说明, 本领域的普通技术人员 应当理解: 其依然可以对前述各实施例所记载的技术方案进行修改,或者对其 中部分技术特征进行等同替换; 而这些修改或者替换, 并不使相应技术方案的 本质脱离本发明各实施例技术方案的精神和范围。

Claims

1、 一种业务切换方法, 其特征在于, 包括:
分组交换 PS域网络实体接收携带终端的业务改变和不受限数字信息回落 SCUD IF能力的消息;
PS域网络实体将携带所述终端的 SCUDIF能力的消息发送给电路交换 CS 域网络侧,以使 CS域网络侧在进行单一无线视频呼叫连续性切换 vSRVCC时根 据所述终端的 SCUDIF能力选择切换流程。
2、 根据权利要求 1所述的方法, 其特征在于, 当终端在 PS接入进行附着 Attach请求或者进行跟踪区更新 TAU请求时, 在终端网络能力 "MS Network Capability" 参数中携带所述终端的 SCUDIF能力。
3、 根据权利要求 1 或 2 所述的方法, 其特征在于, 所述终端的 SCUDIF 能力包括指示是否支持业务改变和回落 support of service change and fallback的 RI参数, 可选的还携带指示多媒体的承载能力的 BC1参数, 或者 携带指示语音的承载能力的 BC2参数,或者携带指示是否支持增强的网络发起 呼叫中修改(Enhanced Network-initiated ICM)的 ENICM参数。
4、 根据权利要求 1 或 2 所述的方法, 其特征在于, 所述方法还包括 PS 网络实体接收 CS域网络实体的 SCUDIF能力, 然后通过初始上下文建立请求 Initial Context Setup Request中携带所述 CS域网络实体的 SCUDIF能力发 送给所述终端。
5、 根据权利要求 1或 2所述的方法, 其特征在于, CS域网络侧包括移动 交换中心服务器 MSC Server , MSC Server在 vSRVCC时根据终端的 SCUDIF能 力选择切换流程包括:
如果终端和 MSC Server都支持 SCUDIF , 则先进行单一无线语音呼叫连续 性 SRVCC过程, 然后所述终端向所述 MSC Server发送 MODIFY消息将承载能力 由语音修改成多媒体, 在多媒体承载上进行 H. 245协商; 或
如果终端和 MSC Server至少其中之一不支持 SCUDIF,如果终端支持多媒 体承载能力, 则按照多媒体承载能力切换到目的 CS 网络, 然后在终端与 MSC Server之间进行 H. 245协商, 完成多媒体会话连接。
6、 一种终端, 其特征在于, 包括第一处理模块和第一发送模块: 所述第一处理模块用于将终端的业务改变和不受限数字信息回落 SCUDIF 能力添加到发送给分组交换 P S域网络实体的消息中;
所述第一发送模块用于将携带所述终端的 SCUDIF能力的消息通过 PS域网 络实体发送给电路交换 CS域网络侧,以使 CS域网络侧在进行单一无线视频呼 叫连续性切换时根据所述终端的 SCUDIF能力选择切换流程。
7、 如权利要求 6所述的终端, 其特征在于, 所述第一处理模块用于终端 在 PS接入进行附着 At tach请求或者进行跟踪区更新 TAU请求时,在终端网络 能力 "MS Network Capabi l i ty" 参数中携带所述终端的 SCUDIF能力。
8、 一种分组交换 PS域网络实体, 其特征在于, 包括: 第二接收模块和第 二发送模块: 所述第二接收模块用于接收携带终端的业务改变和不受限数字信息回落
SCUDIF能力的消息;
所述第二发送模块用于将所述携带终端的 SCUDIF能力的消息发送给电路 交换 CS域网络侧,以使 CS域网络侧在进行单一无线视频呼叫连续性切换时根 据所述终端的 SCUDIF能力选择切换流程。
9、 如权利要求 8所述的 PS网络实体, 其特征在于, 所述第二接收模块还 用于接收 CS域网络实体的 SCUDIF能力;所述第二发送模块还用于通过初始上 下文建立请求 Ini t ia l Context Setup Reques t中携带所述 CS域网络实体的 SCUDIF能力发送给所述终端。
10、 如权利要求 8所述 PS域网络实体, 其特征在于, 所述 PS域网络实体 包括移动管理实体 MME或者 GPRS业务支撑节点 SGSN。
11、 一种移动交换中心服务器 MSC Server , 其特征在于, 包括第三接收 模块和第三处理模块:
所述第三接收模块用于通过分组 PS域网络实体接收携带终端的业务改变 和不受限数字信息回落 SCUDIF能力的消息;
所述第三处理模块用于在进行单一无线视频呼叫连续性切换时根据所述 终端的 SCUDIF能力选择切换流程。
12、 如权利要求 11所述的 MSC Server , 其特征在于, 所述第三处理模块 用于在进行单一无线视频呼叫连续性切换时根据所述终端的 SCUDIF能力选择 切换流程包括:
如果终端和 MSC Server都支持 SCUDIF , 则先进行单一无线语音呼叫连续 性 SRVCC过程, 然后所述终端向所述 MSC Server发送 MODIFY消息将承载能力 由语音修改成多媒体, 在多媒体承载上进行 H. 245协商; 或
如果终端和 MSC Server至少其中之一不支持 SCUDIF,如果终端支持多媒 体承载能力, 则按照多媒体承载能力切换到目的 CS 网络, 然后在终端与 MSC Server之间进行 H. 245协商, 完成多媒体会话连接。
13、 一种业务切换系统, 其特征在于, 包括: 终端和分组交换 PS域网络 实体:
所述终端用于发送携带所述终端的业务改变和不受限数字信息回落 SCUDIF能力的消息;
所述 PS域网络实体用于接收携带所述终端的 SCUDIF能力的消息,并将携 带所述终端的 SCUDIF能力的消息发送给电路交换 CS域网络侧, 以使 CS域网 络侧在进行单一无线视频呼叫连续性切换时根据所述终端的 SCUDIF能力选择 切换流程。
14、 如权利要求 13所述的系统, 其特征在于, 所述 PS网络实体还用于接 收 CS 域网络实体的 SCUDIF 能力, 然后通过初始上下文建立请求 Ini t ia l Context Setup Reques t中携带所述 CS域网络实体的 SCUDIF能力发送给所述 终端。
15、 如权利要求 1 3或 14所述的系统, 其特征在于, CS域网络侧包括移 动交换中心服务器 MSC Server , 所述 MSC Server在进行单一无线视频呼叫连 续性切换时根据所述终端的 SCUDIF能力选择切换流程包括:
如果终端和 MSC Server都支持 SCUDIF , 则先进行单一无线语音呼叫连续 性 SRVCC过程, 然后所述终端向所述 MSC Server发送 MODIFY消息将承载能力 由语音修改成多媒体, 在多媒体承载上进行 H. 245协商; 或
如果终端和 MSC Server至少其中之一不支持 SCUDIF,如果终端支持多媒 体承载能力, 则按照多媒体承载能力切换到目的 CS 网络, 然后在终端与 MSC Server之间进行 H. 245协商, 完成多媒体会话连接。
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