WO2016095097A1 - Csfb用户设备快速返回的方法、装置和系统 - Google Patents

Csfb用户设备快速返回的方法、装置和系统 Download PDF

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Publication number
WO2016095097A1
WO2016095097A1 PCT/CN2014/093913 CN2014093913W WO2016095097A1 WO 2016095097 A1 WO2016095097 A1 WO 2016095097A1 CN 2014093913 W CN2014093913 W CN 2014093913W WO 2016095097 A1 WO2016095097 A1 WO 2016095097A1
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Prior art keywords
release
service
message
trigger
rrc connection
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PCT/CN2014/093913
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English (en)
French (fr)
Inventor
杨兵
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP14908132.5A priority Critical patent/EP3200551A4/en
Priority to PCT/CN2014/093913 priority patent/WO2016095097A1/zh
Priority to CN201480081126.4A priority patent/CN106576379A/zh
Publication of WO2016095097A1 publication Critical patent/WO2016095097A1/zh
Priority to ZA2017/02941A priority patent/ZA201702941B/en
Priority to US15/623,986 priority patent/US10412638B2/en

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    • 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
    • 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]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H04W76/34—Selective release of ongoing connections

Definitions

  • the present invention relates to a mobile communication system, and more particularly to a method, apparatus and system for rapidly returning a circuit domain exchange drop user equipment.
  • CSFB circuit switched fallback
  • GSM Global System for Mobile Communications
  • UMTS Universal Mobile Telecommunications System
  • PS packet switched
  • Step 1 the UE sends a disconnect message to the Mobile Switching Center (MSC);
  • MSC Mobile Switching Center
  • Step 2 The MSC sends a release message to the UE.
  • Step 3 The UE sends a release complete message to the MSC.
  • Step 4 The MSC sends an Iu release command to the Radio Network Controller (RNC).
  • RNC Radio Network Controller
  • Step 5 The RNC sends a radio link reconfiguration prepare message to the base station.
  • Step 6 The base station sends a radio link reconfiguration ready (radio link reconfiguration ready) Information to the RNC;
  • Step 7 the RNC sends a radio bearer release (radio bearer release) message to the UE;
  • Step 8 the base station sends a radio link reconfiguration commit (radio link reconfiguration commit) message to the RNC;
  • Step 9 the UE sends a radio bearer release complete (radio bearer release complete) message to the RNC;
  • Step 10 the RNC sends an Iu interface release complete message to the MSC;
  • Step 11 The PS inactivity timer expires, and the PS release is initiated.
  • the duration of the inactivity timer may be used to limit the time when the UE is in the PS inactive state.
  • Step 12 The RNC sends a radio resource control (RRC) release release (RRC connection release), where the RRC connection release message carries the target frequency information;
  • RRC radio resource control
  • Step 13 The UE quickly returns to the LTE network according to the target frequency information.
  • Step 14 Release the PS service resources of the Iu and Iub ports.
  • the UE needs to complete the CS service release, the PS service release process, and the RRC connection release before returning to the LTE network.
  • the delay of the CSFB user equipment returning to the LTE is delayed due to the complicated and long-term release process. Too long, the user feels worse.
  • the embodiment of the invention provides a method, a device and a system for quickly returning a CSFB user equipment, which are used to reduce the delay of the CSFB user equipment and improve the user experience.
  • a first aspect of the present invention provides a method for fast return of a CSFB user equipment, including: receiving a trigger message sent by a mobile switching center MSC, where the trigger message is used to trigger a circuit-switched CS service for releasing a CSFB user equipment UE, The UE simultaneously runs the CS service and the packet-switched PS service, and sends an RRC connection release message to the UE according to the trigger message, to trigger the UE to release the radio bearer of the CS service according to the RRC connection release message, The radio bearer of the PS service and the RRC connection, and quickly return to the Long Term Evolution LTE network.
  • the method further includes: releasing the CS domain resource of the Iu interface occupied by the UE according to the trigger message.
  • the method further includes: The trigger message sends a PS domain release request message to the GPRS service support node SGSN, and receives an Iu interface release command sent by the SGSN to release the Iu interface PS domain resource occupied by the UE.
  • the method further includes: triggering, by the eNB to release the Iub interface CS and/or occupied by the UE, according to the Iu interface release command sent by the SGSN. Or PS domain resources.
  • the trigger message is an Iu interface release command.
  • a second aspect of the present invention provides a device for fast return of a CSFB user equipment, comprising: a receiver, configured to receive a trigger message sent by a mobile switching center MSC, where the trigger message is used to trigger release of a CS service of a CSFB user equipment UE
  • the UE is configured to simultaneously send the CS service and the PS service
  • the processor is configured to generate an RRC connection release message according to the trigger message received by the receiver, where the transmitter is configured to send the RRC connection release message generated by the processor to The UE, in order to trigger the UE to release the radio bearer of the CS service, the radio bearer of the PS service, and the RRC connection according to the RRC connection release message, and quickly return to the long term evolution LTE network.
  • the processor is further configured to: release, according to the trigger message, an Iu interface CS domain resource that is occupied by the UE.
  • the processor is further configured to send an RRC connection to the device according to the trigger message
  • the PS domain release request message is sent to the GPRS service support node SGSN according to the trigger message.
  • the receiver is further configured to receive an Iu interface release command sent by the SGSN, and release the Iu occupied by the UE. Port PS domain resources.
  • the processor is further configured to: trigger the base station according to the Iu interface release command sent by the SGSN received by the receiver The Iub interface CS and/or PS domain resources occupied by the UE are released.
  • the trigger message is an Iu interface release command.
  • a third aspect of the present invention provides a system for fast return of a CSFB user equipment, including: a radio network controller RNC, a CSFB user equipment UE, and a mobile switching center MSC, wherein the UE simultaneously runs a CS service and a PS service;
  • the trigger message is used to send a trigger message to the RNC, and the trigger message is used to trigger the release of the CS service of the UE.
  • the RNC is configured to receive a trigger message sent by the MSC, and send an RRC connection release according to the trigger message.
  • the UE is configured to receive an RRC connection release message sent by the RNC, and release a radio bearer of the CS service, a radio bearer of the PS service, and an RRC connection according to the RRC connection release message. And quickly return to the LTE network.
  • the system further includes a GPRS service support node SGSN, where the RNC is further configured to send the PS domain after receiving the trigger message sent by the MSC And releasing the request message to the SGSN, where the SGSN is configured to receive a PS domain release request message sent by the RNC, and release the Iu interface PS domain resource occupied by the UE.
  • a GPRS service support node SGSN where the RNC is further configured to send the PS domain after receiving the trigger message sent by the MSC And releasing the request message to the SGSN, where the SGSN is configured to receive a PS domain release request message sent by the RNC, and release the Iu interface PS domain resource occupied by the UE.
  • the RNC is further configured to: trigger the base station to release the Iub occupied by the UE according to the Iu interface release command sent by the SGSN Port CS and / or PS domain resources.
  • the RNC is further configured to: release, according to the trigger message sent by the MSC, the occupied by the UE Iu port CS domain resource.
  • the RRC connection release message is sent to the UE to trigger the UE to release the CS service, the PS service, and the RRC connection according to the RRC connection release message. , streamlining the release process, thereby reducing the release of CS services And the time required for the PS service, thereby reducing the delay of the CSFB user equipment returning to the LTE network and improving the user experience.
  • FIG. 1 is a flow chart of a method for quickly returning a CSFB user equipment in the prior art
  • FIG. 2 is a flowchart of a method for quickly returning a CSFB user equipment according to an embodiment of the present invention
  • FIG. 3 is a flowchart of a method for quickly returning another CSFB user equipment according to an embodiment of the present invention
  • FIG. 4 is a schematic structural diagram of an apparatus for quickly returning a CSFB user equipment according to an embodiment of the present invention
  • FIG. 5 is a schematic structural diagram of a system for quickly returning a CSFB user equipment according to an embodiment of the present invention
  • FIG. 6 is a schematic structural diagram of a system for quickly returning a CSFB user equipment according to an embodiment of the present invention.
  • the base station control device may be a base station controller (BSC) in the GSM or CDMA system, or may be an RNC in the WCDMA, which is not limited in the embodiment of the present invention.
  • BSC base station controller
  • RNC RNC
  • the execution body of the method may be the above base station control device.
  • 201 Receive a trigger message sent by the MSC, where the trigger message is used to trigger release of the CS service of the CSFB user equipment, where the UE simultaneously runs the CS service and the PS service.
  • the trigger message may be an Iu release command.
  • the CSFB user equipment refers to a user equipment that is dropped from the LTE network to the 2G or 3G network through the CSFB technology.
  • RRC connection release RRC connection release
  • Bearer and RRC connection and quickly return to the LTE network.
  • the RRC connection release message is used to trigger the UE to release the radio bearer of the CS service, the radio bearer of the PS service and the RRC connection, and quickly return to the LTE network; the message may carry a first release cause value, The first release cause value is used to indicate that the release triggered by the message is not an abnormal release; or the message may carry a second release cause value, the second release cause value is not only used to indicate that the release triggered by the message is a normal release, It is further configured to instruct the UE to automatically initiate a PS connection after returning to the LTE network, and continue the PS service that was previously interrupted.
  • the second release cause value is a Directed Signalling Connection Re-establishment.
  • the RRC connection release message carries the target frequency information (Target Frequency Info), so that the CSFB UE returns to the LTE network according to the message.
  • step 202 after receiving the trigger message of the MSC, only one RRC connection release message is sent to the UE, which not only omits the release process of the CS domain radio bearer in steps 5-9 in the prior art, but also omits The PS domain radio bearer release procedure of step 11 greatly reduces the time taken for the CSFB user equipment to return to the LTE network.
  • the RRC connection release message is sent to the UE, to trigger the UE to release the CS service, the PS service, and the RRC connection according to the RRC connection release message, which is simplified.
  • the release process reduces the time required to release the CS service and the PS service, thereby reducing the delay of the CSFB user equipment returning to the LTE network and improving the user experience.
  • the method further includes:
  • the PS domain release request may specifically be an Iu release request.
  • the PS domain release request and the Iu interface release command may carry identifier information to indicate a specific operation object, for example, the identifier information of the UE and/or the resource occupied by the UE.
  • the identification information will not be described later.
  • the method further includes: triggering the base station to release the Iub interface CS and/or the PS domain resource occupied by the UE according to the Iu interface release command sent by the SGSN.
  • step 203 and step 202 are not constrained, that is, step 203 is performed before step 202, or step 203 is after step 202, or step 203 and step 202 are performed simultaneously without limitation.
  • the method further includes:
  • the method further includes: triggering, by the base station, to release the Iub interface CS domain resource occupied by the UE according to the trigger message. For example, it can be triggered by step 5 - step 10 in the method shown in FIG. 1 The base station releases the CS domain resource of the Iu port.
  • both the Iu port and the Iub port belong to the prior art.
  • the Iu port refers to the interface between the MSC or the SGSN and the base station control device
  • the Iub port refers to the interface between the base station control device and the base station.
  • the executive body of the method may be a base station control device.
  • the UE sends a disconnect message to the MSC.
  • the MSC sends a release message to the UE.
  • the UE sends a release complete message to the MSC.
  • the MSC sends an Iu release command message to the RNC.
  • the RNC sends an Iu release request message to the SGSN.
  • the RNC sends an RRC connection release message to the UE.
  • steps 305 and 306 may be interchanged, and is not limited herein.
  • the UE releases the air interface resources of the PS domain and the CS domain, and quickly returns to the LTE network.
  • the method for quickly returning the UE to the LTE network in step 307 can be implemented by referring to the method specified in the 3gpp protocol, and details are not described herein again.
  • the SGSN sends an Iu release command message to the RNC according to the received Iu release request message.
  • the RNC releases the PS domain resource of the Iu interface according to the Iu release command message received from the SGSN.
  • the PS domain resource of the Iu interface may be a PS radio access bearer.
  • the RNC sends an Iu release complete message to the SGSN.
  • the RNC sends a radio link deletion request message to the base station.
  • the base station may be a NodeB.
  • the base station sends a radio link deletion response (radio link deletion response) message to the RNC.
  • the RNC releases the CS domain resource of the Iu interface according to the Iu release command message received from the MSC.
  • the RNC sends an Iu release complete message to the MSC.
  • step 301 is applied to the scenario in which the local UE is actively released. If the peer UE is actively released, step 301 may be omitted.
  • an embodiment of the present invention provides a device for quickly returning a CSFB user equipment, and the device may be used to perform the method provided in the embodiment shown in FIG. RNC steps.
  • the apparatus includes a receiver 401, a processor 402, and a transmitter 403.
  • the receiver 401 is configured to receive a trigger message sent by the MSC, where the trigger message is used to trigger release of the CS service of the CSFB user equipment, where the UE simultaneously runs the CS service and the PS service;
  • the processor 402 is configured to generate an RRC connection release message according to the trigger message received by the receiver 401.
  • the transmitter 403 is configured to send an RRC connection release message generated by the processor 402 to the UE, to trigger the UE to release the radio bearer of the CS service, the radio bearer of the PS service according to the RRC connection release message, and
  • the RRC connects and quickly returns to the Long Term Evolution LTE network.
  • the processor 402 is specifically configured to: release the CS domain resource of the Iu interface occupied by the UE according to the trigger message received by the receiver 401.
  • the trigger message may specifically be an Iu interface release command.
  • the processor 402 is further configured to: after the sending the RRC connection is released to the UE according to the trigger message, send a PS domain release request message to the SGSN according to the trigger message;
  • the receiver 401 is further configured to receive an Iu interface release command sent by the SGSN, and release the Iu interface PS domain resource occupied by the UE.
  • processor 402 is further configured to:
  • the triggering base station releases the occupied by the UE according to the Iu interface release command sent by the SGSN.
  • the device provided by the foregoing embodiment sends an RRC connection release message to the UE after receiving the trigger message for releasing the CS service sent by the core network, to trigger the UE to release the CS service, the PS service, and the RRC connection according to the RRC connection release message, which is simplified.
  • the release process reduces the time required to release the CS service and the PS service, thereby reducing the delay of the CSFB user equipment returning to the LTE network and improving the user experience.
  • the embodiment of the present invention provides a system for quickly returning a CSFB user equipment, including an RNC 501, a CSFB user equipment 502, and an MSC 503.
  • the CSFB user equipment 502 simultaneously runs a CS service and a PS service.
  • the MSC 503 is configured to send a trigger message to the RNC 501, where the trigger message is used to trigger release of the CS service of the CSFB user equipment 501.
  • the RNC 501 is configured to receive a trigger message sent by the MSC 503, and send an RRC connection release message to the CSFB user equipment 502 according to the trigger message;
  • the CSFB user equipment 502 is configured to receive an RRC connection release message sent by the RNC 501, and release the radio bearer of the CS service, the radio bearer of the PS service, and the RRC connection according to the RRC connection release message, and quickly return to the LTE network. .
  • the trigger message may specifically be an Iu interface release command.
  • the RNC 501 can be used to perform the method provided by the embodiment shown in FIG. 2, and can also be used to perform the operation steps of the RNC in the embodiment shown in FIG. 3, and details are not described herein again.
  • the RNC 501 is further configured to release the CS domain resource of the Iu interface occupied by the UE according to the trigger message sent by the MSC 503.
  • the RNC 501 is further configured to trigger the base station to release the Iub interface CS domain resource occupied by the UE according to the trigger message sent by the MSC 503.
  • the foregoing system further includes an SGSN 504, which is specifically as follows:
  • the RNC 501 is further configured to: after receiving the trigger message sent by the MSC 503, send a PS domain release request message to the SGSN 504;
  • the SGSN 504 is configured to receive the PS domain release request message sent by the RNC 501, and release the Iu interface PS domain resource occupied by the CSFB user equipment 502.
  • the PS domain release request may specifically be an Iu release request.
  • the RNC 501 is further configured to trigger the base station to release the Iub interface CS and/or the PS domain resource occupied by the CSFB user equipment 502 according to the Iu interface release command sent by the SGSN 504.
  • the system provided by the foregoing embodiment sends an RRC connection release message to the UE after receiving the trigger message for releasing the CS service sent by the core network, to trigger the UE to release the CS service, the PS service, and the RRC connection according to the RRC connection release message, which is simplified.
  • the release process reduces the time required to release the CS service and the PS service, thereby reducing the delay of the CSFB user equipment returning to the LTE network and improving the user experience.
  • the foregoing program may be stored in a computer readable storage medium, and when executed, the program includes The steps of the foregoing method embodiments; 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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Abstract

本发明公开了一种CSFB用户设备快速返回的方法，包括：接收移动交换中心MSC发送的触发消息，所述触发消息用于触发释放CSFB用户设备UE的电路交换CS业务，所述UE同时运行CS业务和分组交换PS业务；根据所述触发消息，发送无线链路控制RRC连接释放消息给所述UE，以触发所述UE根据所述RRC连接释放消息释放所述CS业务的无线承载、所述PS业务的无线承载以及RRC连接，并快速返回到长期演进LTE网络。采用本发明实施例，能够减小CSFB用户设备返回LTE网络的时延，提升用户感受。

Description

CSFB用户设备快速返回的方法、装置和系统 技术领域
本发明涉及移动通信系统，尤其涉及一种电路域交换回落用户设备快速返回的方法、装置和系统。
背景技术
在不支持长期演进(Long Term Evolution，LTE)网络语音业务(Voice over LTE，VoLTE)功能的网络中，为了解决语音业务的需求，现有3gpp中采用了电路域交换回落(circuit switched fallback，CSFB)技术，CSFB可以使得用户设备(user equipment，UE)回落到全球移动通信系统(Global System for Mobile Communications,GSM)或者通用移动通讯系统(Universal Mobile Telecommunications System,UMTS)网络。针对CSFB回落到UMTS网络的情况，当电路域交换(circuit switched，CS)业务进行过程中有可能会并发分组交换(packet switched,PS)业务，并且当CS业务呼叫结束时PS业务还没有结束。在现有技术中，采用图1所示的方法来实现CSFB用户设备的快速返回。
步骤1、UE发送拆链(disconnect)消息给移动交换中心(Mobile Switching Center，MSC)；
步骤2、MSC发送释放(release)消息给UE；
步骤3、UE发送释放完成(release complete)消息给MSC；
步骤4、MSC发送Iu口释放命令(Iu release command)给无线网络控制器(Radio Network Controller，RNC)；
步骤5、RNC发送无线链路重配准备(radio link reconfiguration prepare)消息给基站；
步骤6、基站发送无线链路重配就绪(radio link reconfiguration ready)消 息给RNC；
步骤7、RNC发送无线承载释放(radio bearer release)消息给UE；
步骤8、基站发送无线链路重配确认(radio link reconfiguration commit)消息给RNC；
步骤9、UE发送无线承载释放完成(radio bearer release complete)消息给RNC；
步骤10、RNC发送Iu口释放完成消息给MSC；
步骤11、PS非激活定时器超时，发起PS释放；其中，非激活定时器的时长可以用于限制UE处于PS非激活状态的时间。
步骤12、RNC发送无线资源控制(radio resource control，RRC)连接释放(RRC connection release)，其中，RRC连接释放消息中携带有目标频率信息；
步骤13、UE根据该目标频率信息快速返回到LTE网络；
步骤14、释放Iu和Iub口的PS业务资源。
由图1可以看出，UE在重新返回到LTE网络之前需要完成CS业务释放、PS业务释放流程，以及RRC连接释放，由于整个释放流程复杂、耗费时间长，导致CSFB用户设备返回LTE的时延过长，用户感受变差。
发明内容
本发明实施例提供了一种CSFB用户设备快速返回的方法、装置和系统，用于减小CSFB用户设备返回的时延，提升用户感受。
本发明的第一方面提供了一种CSFB用户设备快速返回的方法，包括：接收移动交换中心MSC发送的触发消息，所述触发消息用于触发释放CSFB用户设备UE的电路交换CS业务，所述UE同时运行CS业务和分组交换PS业务；根据所述触发消息，发送RRC连接释放消息给所述UE，以触发所述UE根据所述RRC连接释放消息释放所述CS业务的无线承载、所述PS业务的无线承载以及RRC连接，并快速返回到长期演进LTE网络。
结合第一方面，在第一方面的第一种实现方式中，还包括：根据所述触发消息，释放所述UE占用的Iu口CS域资源。
结合第一方面或第一方面的第一种实现方式，在第一方面的第二种实现方式中，在所述根据所述触发消息，发送RRC连接释放给所述UE之后，还包括：根据所述触发消息，发送PS域释放请求消息给GPRS业务支撑结点SGSN；接收所述SGSN发送的Iu口释放命令，释放所述UE占用的Iu口PS域资源。
结合第一方面的第二种实现方式，在第一方面的第三种实现方式中，还包括：根据所述SGSN发送的Iu口释放命令，触发基站释放所述UE占用的Iub口CS和/或PS域资源。
结合第一方面或第一方面的上述任一种实现方式，在第一方面的第四种实现方式中，所述触发消息为Iu口释放命令。
本发明的第二方面提供了一种CSFB用户设备快速返回的装置，包括：接收器，用于接收移动交换中心MSC发送的触发消息，所述触发消息用于触发释放CSFB用户设备UE的CS业务，所述UE同时运行CS业务和PS业务；处理器，用于根据所述接收器接收的触发消息，生成RRC连接释放消息；发送器，用于发送所述处理器生成的RRC连接释放消息给所述UE，以触发所述UE根据所述RRC连接释放消息释放所述CS业务的无线承载、所述PS业务的无线承载以及RRC连接，并快速返回到长期演进LTE网络。
结合第二方面，在第二方面的第一种实现方式中，所述处理器还用于：根据所述触发消息，释放所述UE占用的Iu口CS域资源。
结合第二方面或第二方面的第一种实现方式，在第二方面的第二种实现方式中，所述处理器，还用于在所述根据所述触发消息，发送RRC连接释放给所述UE之后，根据所述触发消息，发送PS域释放请求消息给GPRS业务支撑结点SGSN；所述接收器，还用于接收所述SGSN发送的Iu口释放命令，释放所述UE占用的Iu口PS域资源。
结合第二方面的第二种实现方式，在第二方面的第三种实现方式中，所述处理器还用于：根据所述接收器接收的所述SGSN发送的Iu口释放命令，触发基站释放所述UE占用的Iub口CS和/或PS域资源。
结合第二方面或第二方面的上述任一种实现方式，在第二方面的第四种实现方式中，所述触发消息为Iu口释放命令。
本发明第三方面提供了一种CSFB用户设备快速返回的系统，包括：无线网络控制器RNC、CSFB用户设备UE和移动交换中心MSC，所述UE同时运行CS业务和PS业务；所述MSC，用于发送触发消息给所述RNC，所述触发消息用于触发释放所述UE的CS业务；所述RNC，用于接收所述MSC发送的触发消息，并根据所述触发消息发送RRC连接释放消息给所述UE；所述UE，用于接收所述RNC发送的RRC连接释放消息，并根据所述RRC连接释放消息释放所述CS业务的无线承载、所述PS业务的无线承载以及RRC连接，并快速返回到LTE网络。
结合第三方面，在第三方面的第一种实现方式中，所述系统还包括GPRS业务支撑结点SGSN；所述RNC，还用于在所述接收MSC发送的触发消息后，发送PS域释放请求消息给所述SGSN；所述SGSN，用于接收所述RNC发送的PS域释放请求消息，释放所述UE占用的Iu口PS域资源。
结合第三方面的第一种实现方式，在第三方面的第二种实现方式中，所述RNC还用于：根据所述SGSN发送的Iu口释放命令，触发基站释放所述UE占用的Iub口CS和/或PS域资源。
结合第三方面或第三方面的上述任一种实现方式，在第三方面的第三种实现方式中，所述RNC还用于：根据所述MSC发送的触发消息，释放所述UE占用的Iu口CS域资源。
基于上述本发明实施例提供的方法，在接收核心网发送的释放CS业务的触发消息后发送RRC连接释放消息给UE，以触发UE根据所述RRC连接释放消息释放CS业务、PS业务以及RRC连接，简化了释放流程，从而缩减了释放CS业务 和PS业务所需的时间，从而减小了CSFB用户设备返回LTE网络的时延，提升用户感受。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图进行简单地介绍，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为现有技术中一种CSFB用户设备快速返回的方法流程图；
图2为本发明实施例中一种CSFB用户设备快速返回的方法流程图；
图3为本发明实施例中另一种CSFB用户设备快速返回的方法流程图；
图4为本发明实施例中一种CSFB用户设备快速返回的装置结构示意图；
图5为本发明实施例中一种CSFB用户设备快速返回的系统结构示意图；
图6为本发明实施例中又一种CSFB用户设备快速返回的系统结构示意图。
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。
本文中结合基站和/或基站控制设备来描述各种方面。
基站控制设备，可以是GSM或CDMA系统中的基站控制器(Base Station Controller，BSC)，也可以是WCDMA中的RNC，本发明实施例中并不限定。
以下描述中，为了说明而不是为了限定，提出了诸如特定系统结构、接口、技术之类的具体细节，以便透彻理解本发明。然而，本领域的技术人员 应当清楚，在没有这些具体细节的其它实施例中也可以实现本发明。在其它情况中，省略对众所周知的装置、电路以及方法的详细说明，以免不必要的细节妨碍本发明的描述。
本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。
如图2所示，本发明实施例提供的一种电路域交换回落用户设备快速返回的方法，具体如下所述。该方法的执行主体可以是上述基站控制设备。
201、接收MSC发送的触发消息，所述触发消息用于触发释放CSFB用户设备的CS业务，所述UE同时运行CS业务和PS业务。
其中，上述触发消息具体可以是Iu口释放命令(Iu release command)；上述CSFB用户设备指的是通过CSFB技术从LTE网络回落到2G或3G网络的用户设备。
202、根据所述触发消息，发送RRC连接释放(RRC connection release)消息给所述UE，以触发所述UE根据所述RRC连接释放消息释放所述CS业务的无线承载、所述PS业务的无线承载以及RRC连接，并快速返回到LTE网络。
其中，RRC connection release消息用于触发UE释放所述CS业务的无线承载，所述PS业务的无线承载以及RRC连接，并快速返回到LTE网络；该消息具体可以携带有第一释放原因值，该第一释放原因值用于指示该消息触发的释放不属于异常释放；或者，该消息可以携带有第二释放原因值，该第二释放原因值不但用于指示该消息触发的释放为正常释放，还用于指示UE在返回LTE网络后自动发起PS连接，继续之前被中断的PS业务，例如，该第二释放原因值为直接信令连接重建立(Directed Signalling Connection Re-establishment)。此外，该RRC连接释放消息中携带有目标频率信息(Target Frequency Info)，以便CSFB UE根据该消息返回到LTE网络。
需要说明的是，在步骤202中，在接收到MSC的触发消息之后仅发送一条RRC连接释放消息给UE，不但省略了现有技术中步骤5-9的CS域无线承载的释放流程，还省略了步骤11的PS域无线承载释放流程，因而大大降低了CSFB用户设备返回LTE网络的耗费时长。
上述实施例提供的方法中，在接收核心网发送的释放CS业务的触发消息后发送RRC连接释放消息给UE，以触发UE根据所述RRC连接释放消息释放CS业务、PS业务以及RRC连接，简化了释放流程，从而缩减了释放CS业务和PS业务所需的时间，从而减小了CSFB用户设备返回LTE网络的时延，提升用户感受。
可选地，在本实施例的第一种实施场景下，在步骤201之后还包括：
203、根据所述触发消息，发送PS域释放请求消息给GPRS业务支撑结点(Serving GPRS Support Node，SGSN)。
其中，该PS域释放请求具体可以为Iu口释放请求(Iu release request)。
需要说明的是，本发明各实施例中PS域释放请求以及Iu口释放命令等消息中均可以携带有标识信息，以指示具体的操作对像，例如，UE的标识信息和/或UE占用资源的标识信息，后续不再赘述。
204、接收SGSN发送的Iu口释放命令，释放所述UE占用的Iu口PS域资源。
进一步地，还可以包括：根据所述SGSN发送的Iu口释放命令，触发基站释放所述UE占用的Iub口CS和/或PS域资源。
需要说明的是，步骤203和步骤202的执行先后顺序不做约束，即步骤203在步骤202之前，或步骤203在步骤202之后，或步骤203和步骤202同时执行都可以，不做限制。
可选地，在本实施例的第二种实施场景下，步骤201之后还包括:
206、根据所述触发消息，释放所述UE占用的Iu口CS域资源。
进一步地，还可以包括：根据所述触发消息，触发基站释放所述UE占用的Iub口CS域资源。例如，可以采用图1所示方法中的步骤5-步骤10来触发 基站释放Iu口CS域资源。
需要指出的是，上述两种实施场景可以结合使用，此处不再赘述。此外，Iu口和Iub口均属于现有技术，例如，Iu口指的是MSC或SGSN与基站控制设备之间的接口，Iub口指的是基站控制设备与基站之间的接口。
如图3所示，本发明实施例提供的另一种CSFB用户设备快速返回的方法，具体如下所述。该方法的执行主体可以是基站控制设备。
301、UE发送拆链(disconnect)消息给MSC。
302、MSC发送释放(release)消息给UE。
303、UE发送释放完成(release complete)消息给MSC。
304、MSC发送Iu release command消息给RNC。
305、RNC发送Iu release request消息给SGSN。
306、RNC发送RRC connection release消息给UE。
其中，步骤305和306的执行先后顺序可以互换，此处不予限制。
307、UE释放PS域和CS域的空口资源，并快速返回到LTE网络。
其中，步骤307中UE快速返回到LTE网络具体可以参照3gpp协议规定的方式来实现，此处不再赘述。
308、SGSN根据接收到的Iu release request消息，发送Iu release command消息给RNC。
309、RNC根据从SGSN接收到的Iu release command消息，释放Iu口的PS域资源。
例如，Iu口的PS域资源可以是PS无线接入承载。
310、RNC发送Iu release complete消息给SGSN。
311、RNC发送无线链路删除请求(radio link deletion request)消息给基站。
其中，该基站可以是NodeB。
312、基站发送无线链路删除响应(radio link deletion response)消息给RNC。
313、RNC根据从MSC接收的Iu release command消息，释放Iu口的CS域资源。
314、RNC发送Iu release complete消息给MSC。
需要说明的是，上述步骤301应用在本端UE主动释放的场景下，若对端UE进行主动释放，则步骤301可以省略。
如图4所示，本发明实施例提供了一种CSFB用户设备快速返回的装置，该装置可以用于执行图2所示实施例提供的方法，还可以用于执行图3所示实施例中RNC的操作步骤。该装置包括：接收器401、处理器402和发送器403。
接收器401，用于接收MSC发送的触发消息，所述触发消息用于触发释放CSFB用户设备的CS业务，所述UE同时运行CS业务和PS业务；
处理器402，用于根据接收器401接收的触发消息，生成RRC连接释放消息；
发送器403，用于发送处理器402生成的RRC连接释放消息给所述UE，以触发所述UE根据所述RRC连接释放消息释放所述CS业务的无线承载、所述PS业务的无线承载以及RRC连接，并快速返回到长期演进LTE网络。
其中，RRC连接释放消息可以参见图2所示实施例中的相关描述，不再赘述。
可选地，处理器402具体用于：根据接收器401接收的所述触发消息，释放所述UE占用的Iu口CS域资源。
其中，所述触发消息具体可以为Iu口释放命令。
可选地，处理器402还用于：在所述根据所述触发消息，发送RRC连接释放给所述UE之后，根据所述触发消息，发送PS域释放请求消息给SGSN；
接收器401，还用于接收所述SGSN发送的Iu口释放命令，释放所述UE占用的Iu口PS域资源。
进一步地，处理器402还用于：
根据所述SGSN发送的Iu口释放命令，触发基站释放所述UE占用的 Iub口CS和/或PS域资源。
上述实施例提供的装置，通过在接收核心网发送的释放CS业务的触发消息后发送RRC连接释放消息给UE，以触发UE根据所述RRC连接释放消息释放CS业务、PS业务以及RRC连接，简化了释放流程，从而缩减了释放CS业务和PS业务所需的时间，从而减小了CSFB用户设备返回LTE网络的时延，提升用户感受。
如图5所示，本发明实施例提供了一种CSFB用户设备快速返回的系统，包括RNC501、CSFB用户设备502和MSC503，其中，CSFB用户设备502同时运行CS业务和PS业务。
MSC503，用于发送触发消息给RNC501，所述触发消息用于触发释放CSFB用户设备501的CS业务；
RNC501，用于接收MSC503发送的触发消息，并根据所述触发消息发送RRC连接释放消息给CSFB用户设备502；
CSFB用户设备502，用于接收RNC501发送的RRC连接释放消息，并根据所述RRC连接释放消息释放所述CS业务的无线承载、所述PS业务的无线承载以及RRC连接，并快速返回到LTE网络。
其中，上述触发消息具体可以是Iu口释放命令。
需要说明的是，RNC501可以用于执行图2所示实施例提供的方法，还可以用于执行图3所示实施例中RNC的操作步骤，此处不再赘述。
可选地，RNC501还用于根据MSC503发送的触发消息，释放所述UE占用的Iu口CS域资源。
进一步地，RNC501还用于根据MSC503发送的触发消息，触发基站释放所述UE占用的Iub口CS域资源。
可选地，参见图6，上述系统还包括SGSN504，具体如下：
RNC501，还用于在接收MSC503发送的触发消息后，发送PS域释放请求消息给SGSN504；
SGSN504，用于接收RNC501发送的PS域释放请求消息，释放CSFB用户设备502占用的Iu口PS域资源。
其中，上述PS域释放请求具体可以为Iu口释放请求(Iu release request)。
进一步地，RNC501还用于根据所述SGSN504发送的Iu口释放命令，触发基站释放CSFB用户设备502占用的Iub口CS和/或PS域资源。
上述实施例提供的系统，通过在接收核心网发送的释放CS业务的触发消息后发送RRC连接释放消息给UE，以触发UE根据所述RRC连接释放消息释放CS业务、PS业务以及RRC连接，简化了释放流程，从而缩减了释放CS业务和PS业务所需的时间，从而减小了CSFB用户设备返回LTE网络的时延，提升用户感受。
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：ROM、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范围。

Claims (14)

  1. 一种CSFB用户设备快速返回的方法，其特征在于，包括：
    接收移动交换中心MSC发送的触发消息，所述触发消息用于触发释放CSFB用户设备UE的电路交换CS业务，所述UE同时运行CS业务和分组交换PS业务；
    根据所述触发消息，发送无线链路控制RRC连接释放消息给所述UE，以触发所述UE根据所述RRC连接释放消息释放所述CS业务的无线承载、所述PS业务的无线承载以及RRC连接，并快速返回到长期演进LTE网络。
  2. 根据权利要求1所述的方法，其特征在于，还包括：
    根据所述触发消息，释放所述UE占用的Iu口CS域资源。
  3. 根据权利要求1或2所述的方法，其特征在于，在所述根据所述触发消息，发送RRC连接释放给所述UE之后，还包括：
    根据所述触发消息，发送PS域释放请求消息给GPRS业务支撑结点SGSN；
    接收所述SGSN发送的Iu口释放命令，释放所述UE占用的Iu口PS域资源。
  4. 根据权利要求3所述的方法，其特征在于，还包括：
    根据所述SGSN发送的Iu口释放命令，触发基站释放所述UE占用的Iub口CS和/或PS域资源。
  5. 根据权利要求1-4中任一项所述的方法，其特征在于，所述触发消息为Iu口释放命令。
  6. 一种CSFB用户设备快速返回的装置，其特征在于，包括：
    接收器，用于接收移动交换中心MSC发送的触发消息，所述触发消息用于触发释放CSFB用户设备UE的CS业务，所述UE同时运行CS业务和PS业务；
    处理器，用于根据所述接收器接收的触发消息，生成RRC连接释放消息；
    发送器，用于发送所述处理器生成的所述RRC连接释放消息给所述UE， 以触发所述UE根据所述RRC连接释放消息释放所述CS业务的无线承载、所述PS业务的无线承载以及RRC连接，并快速返回到长期演进LTE网络。
  7. 根据权利要求6所述的装置，其特征在于，所述处理器还用于：
    根据所述触发消息，释放所述UE占用的Iu口CS域资源。
  8. 根据权利要求6或7所述的装置，其特征在于，
    所述处理器，还用于在所述根据所述触发消息，发送RRC连接释放给所述UE之后，根据所述触发消息，发送PS域释放请求消息给GPRS业务支撑结点SGSN；
    所述接收器，还用于接收所述SGSN发送的Iu口释放命令，释放所述UE占用的Iu口PS域资源。
  9. 根据权利要求8所述的装置，其特征在于，所述处理器还用于：
    根据所述接收器接收的所述SGSN发送的Iu口释放命令，触发基站释放所述UE占用的Iub口CS和/或PS域资源。
  10. 根据权利要求6-9中任一项所述的装置，其特征在于，所述触发消息为Iu口释放命令。
  11. 一种CSFB用户设备快速返回的系统，其特征在于，包括：无线网络控制器RNC、CSFB用户设备UE和移动交换中心MSC，所述UE同时运行CS业务和PS业务；
    所述MSC，用于发送触发消息给所述RNC，所述触发消息用于触发释放所述UE的CS业务；
    所述RNC，用于接收所述MSC发送的触发消息，并根据所述触发消息发送RRC连接释放消息给所述UE；
    所述UE，用于接收所述RNC发送的RRC连接释放消息，并根据所述RRC连接释放消息释放所述CS业务的无线承载、所述PS业务的无线承载以及RRC连接，并快速返回到LTE网络。
  12. 根据权利要求11所述的系统，其特征在于，所述系统还包括GPRS 业务支撑结点SGSN；
    所述RNC，还用于在所述接收MSC发送的触发消息后，发送PS域释放请求消息给所述SGSN；
    所述SGSN，用于接收所述RNC发送的PS域释放请求消息，释放所述UE占用的Iu口PS域资源。
  13. 根据权利要求12所述的系统，其特征在于，所述RNC还用于：
    根据所述SGSN发送的Iu口释放命令，触发基站释放所述UE占用的Iub口CS和/或PS域资源。
  14. 根据权利要求11-13中任一项所述的系统，其特征在于，所述RNC还用于：
    根据所述MSC发送的触发消息，释放所述UE占用的Iu口CS域资源。
PCT/CN2014/093913 2014-12-16 2014-12-16 Csfb用户设备快速返回的方法、装置和系统 WO2016095097A1 (zh)

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