WO2013185669A1 - 一种实现语音业务回落的方法及装置 - Google Patents

一种实现语音业务回落的方法及装置 Download PDF

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Publication number
WO2013185669A1
WO2013185669A1 PCT/CN2013/079316 CN2013079316W WO2013185669A1 WO 2013185669 A1 WO2013185669 A1 WO 2013185669A1 CN 2013079316 W CN2013079316 W CN 2013079316W WO 2013185669 A1 WO2013185669 A1 WO 2013185669A1
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WIPO (PCT)
Prior art keywords
network
user equipment
target
ixrtt
cell
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PCT/CN2013/079316
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English (en)
French (fr)
Inventor
张�荣
孙伟
Original Assignee
中兴通讯股份有限公司
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Priority to JP2015518835A priority Critical patent/JP6023320B2/ja
Priority to EP13805145.3A priority patent/EP2858414B1/en
Publication of WO2013185669A1 publication Critical patent/WO2013185669A1/zh

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Classifications

    • 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
    • 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
    • H04W36/14—Reselecting a network or an air interface
    • H04W36/142—Reselecting a network or an air interface over the same radio air interface technology
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • H04W76/16—Involving different core network technologies, e.g. a packet-switched [PS] bearer in combination with a circuit-switched [CS] bearer

Definitions

  • the present invention relates to the field of mobile communication technologies, and in particular, to a method and apparatus for implementing voice service fallback.
  • the LTE (Long Term Evolved, Long Term Evolution) network does not support voice services in some cases (for example, the LTE network does not support VoIMS). Therefore, when the UE (User Equipment) needs to initiate voice services, the LTE network will The UE falls back to the lxRTT ( lx Radio Telecommunication Technology, lx wireless communication) network, which is called the Enhanced Circuit Switched Fallback (eCSFB) process. If the UE has PS (Packet Switched) service at the same time, the eNodeB (Evolved Node B) switches the UE's PS service to the HRPD (High Speed Packet Data) network according to the policy. This process is called eCSFB concurrent PS handover process.
  • PS Packet Switched
  • HRPD High Speed Packet Data
  • the eCSFB process may fail due to the failure of the lxRTT network or MME processing.
  • the eNodeB sends a downlink direct transmission message to the UE in the related technical process, and the eNodeB does not perform any processing on the failure.
  • the eCSFB concurrent PS handover to the HRPD process fails due to an error in the HRPD network or the lxRTT network or MME processing. In this failure, the eNodeB also does not handle any such failure.
  • the processing of the eNodeB in the related art is that the failure is not processed much, and only the transparent transmission failure indication is given to the UE.
  • the drawback of this processing is that the UE initiates the CS call duration extension. If the PS service exists at the same time, the PS service interruption time is extended, the data deep groove is obvious, and the user experience is reduced.
  • the embodiment of the invention provides a method and a device for implementing a fallback of a voice service, which enables the user to still perform CS and PS services when the network side fails to process during the voice service fallback process.
  • a method for implementing a fallback of a voice service according to an embodiment of the present invention includes:
  • the evolved Node B sends an indication message to the user equipment to indicate that the user equipment is redirected to the target cell when the processing failure occurs on the network side.
  • the sending the indication message to the user equipment, indicating that the user equipment is redirected to the target cell includes:
  • the eNodeB In the process of the user equipment falling back from the evolved terrestrial radio access network (E-UTRAN) to the lx wireless communication (IxRTT) network, when the network side fails to process, the eNodeB sends a radio resource control (RRC) connection to the user equipment. The message is released, and the redirection information of the target IxRTT network cell is carried in the RRC connection release message, indicating that the user equipment is redirected to the target IxRTT network cell.
  • RRC radio resource control
  • the sending the indication message to the user equipment, indicating that the user equipment is redirected to the target cell includes:
  • the eNodeB In the process of the user equipment falling back from the E-UTRAN to the IxRTT network and the concurrent packet switching domain (PS) handover, when the processing fails on the network side, the eNodeB sends an RRC connection release message to the user equipment, in the RRC.
  • the connection release message carries redirection information of the target IxRTT network cell and redirection information of the target high speed packet data (HRPD) network cell, instructing the user equipment to redirect the voice service to the target IxRTT network cell, and redirect the PS service to the target HRPD Network cell.
  • HRPD high speed packet data
  • the sending the indication message to the user equipment, indicating that the user equipment is redirected to the target cell includes:
  • the processing fails on the network side when the user equipment falls back from the E-UTRAN to the IxRTT network.
  • the eNodeB sends a Mobility From EUTRA Command to the user equipment.
  • the message carries the redirection information of the target IxRTT network cell and the information of the HRPD network in the Mobility From EUTRA Command message, instructing the user equipment to redirect the voice service to the target IxRTT network cell, and continue to perform the PS service in the current HRPD network.
  • the sending the indication message to the user equipment, indicating that the user equipment is redirected to the target cell includes: The processing fails on the network side when the user equipment falls back from the E-UTRAN to the IxRTT network.
  • the eNodeB sends a Mobility From EUTRA Command message to the user equipment.
  • the From EUTRA Command message carries the redirection information of the target HRPD network cell and the information of the IxRTT network, instructs the user equipment to redirect the PS service to the target HRPD network cell, and continues to perform voice service in the current IxRTT network.
  • An apparatus for implementing a fallback of a voice service includes: a determining unit and a failure processing unit, where:
  • the determining unit is configured to: determine whether a processing failure occurs on the network side in the process of enhancing the voice service fallback (eCSFB);
  • the failure processing unit is configured to: when the processing failure occurs on the network side, send an indication message to the user equipment, indicating that the user equipment is redirected to the target cell.
  • the failure processing unit is configured to: when the user equipment falls back from the evolved terrestrial radio access network (E-UTRAN) to the lx wireless communication (IxRTT) network, when the network side fails to process, Sending a radio resource control (RRC) connection release message to the user equipment, and carrying the redirection information of the target IxRTT network cell in the RRC connection release message, indicating that the user equipment is redirected to the target IxRTT network cell.
  • E-UTRAN evolved terrestrial radio access network
  • IxRTT lx wireless communication
  • RRC radio resource control
  • the failure processing unit is configured to: when the user equipment fails to process in the process of falling back from the E-UTRAN to the IxRTT network and the concurrent packet switched domain (PS) handover, Sending an RRC connection release message to the user equipment, and carrying the redirection information of the target IxRTT network cell and the redirection information of the target high speed packet data (HRPD) network cell in the RRC connection release message, instructing the user equipment to redirect the voice service to the target IxRTT
  • the network cell redirects the PS traffic to the target HRPD network cell.
  • the failure processing unit is configured to: when the user equipment falls back from the E-UTRAN to the IxRTT network, the processing fails on the network side, and in the process of concurrent PS handover, when no processing failure occurs on the network side, Sending a Mobility From EUTRA Command message to the user equipment, and carrying the redirection information of the target IxRTT network cell and the information of the HRPD network in the Mobility From EUTRA Command message, instructing the user equipment to redirect the voice service to the target IxRTT network cell, And continue to carry out PS services in the current HRPD network.
  • the failure processing unit is configured to: when the user equipment falls back from the E-UTRAN to the IxRTT network, no processing failure occurs on the network side, and when the processing fails on the network side during the concurrent PS handover, Sending a Mobility From EUTRA Command message to the user equipment, and carrying the redirection information of the target HRPD network cell and the information of the IxRTT network in the Mobility From EUTRA Command message, instructing the user equipment to redirect the PS service to the target HRPD network cell, and continue at the current Voice service in the IxRTT network.
  • the embodiment of the present invention redirects the UE to the target cell of the IxRTT (eCSFB process) or the target cell of the IxRTT and the target cell of the HRPD network (eCSFB concurrent PS) in the scenario where the network side fails to process.
  • the handover process enables the UE to initiate voice services at the fastest speed, while the data service has a deeper ditch, which improves the user experience and optimizes the eCSFB or eCSFB concurrent PS handover process.
  • FIG. 1 is a flowchart of Embodiment 1 of a method for implementing a voice service fallback according to the present invention
  • FIG. 2 is a flowchart of Embodiment 2 of a method for implementing a voice service fallback according to the present invention
  • FIG. 4 is a flowchart of Embodiment 4 of a method for implementing voice service fallback according to the present invention
  • FIG. 5 is a structural diagram of an apparatus for implementing voice service fallback according to an embodiment of the present invention. Preferred embodiment of the invention
  • the UE when the network side fails to process, the UE is instructed to redirect to the target cell by sending an indication message to the UE, and is redirected to the target IxRTT network cell in the eCSFB process, and redirected to the target in the eCSFB concurrent PS handover process.
  • IxRTT network cell and/or target HRPD network cell when the network side fails to process, the UE is instructed to redirect to the target cell by sending an indication message to the UE, and is redirected to the target IxRTT network cell in the eCSFB process, and redirected to the target in the eCSFB concurrent PS handover process.
  • Example 1 As shown in FIG. 1 , a method for implementing a voice service fallback from an E-UTRAN to an IxRTT network according to the embodiment includes:
  • the UE reports a Measurement Report to the eNodeB;
  • This step is optional. If it is a blind eCSFB process, this step does not exist.
  • the eNodeB determines to send an eCSFB process of the E-UTRAN to the IxRTT network to the UE, and sends a Handover From EUTRA Preparation Request message to the UE.
  • the UE initiates a call according to the indication of the eNodeB, and sends an uplink handover direct transfer (UL Handover Preparation Transfer) message to the eNodeB.
  • UL Handover Preparation Transfer uplink handover direct transfer
  • the eNodeB transparently transmits the uplink handover direct transmission message of the UE, and sends an uplink SI CDMA2000 tunnel direct transmission (UPLINK SI CDMA2000 TUNNELING) message to the MME, and the eNodeB starts a timer to wait for the downlink SI CDMA2000 tunnel direct transmission (DL SI CDMA2000 TUNNELING) message of the MME. If the timing timeout has not received the downlink SI CDMA2000 tunnel direct transmission message of the MME, directly execute step 108;
  • the MME transparently transmits the uplink S1 CDMA2000 tunnel direct transmission message of the eNodeB, and sends the S102 direct transmission message to the IWS (Interworking Solution) node;
  • the IWS node fails to process, and the S102 direct transmission message includes processing failure information, and sends a S102 direct transmission message to the MME;
  • the MME transparently transmits the S102 direct transmission message, and sends the downlink SI CDMA2000 tunnel direct transmission message to the eNodeB, where the resource of the IxRTT network and the called ringing response are included;
  • the eNodeB sends the RRC (Radio Resource Control) connection release (RRC Connection Release) message, and the message carries the target. Redirection information of the IxRTT network cell, the UE is quickly redirected to the target IxRTT network cell;
  • RRC Radio Resource Control
  • the eNodeB redirects the UE to the target IxRTT network cell.
  • the UE accesses the target cell according to the redirection information, and starts to initiate a voice service.
  • Example 2 The UE accesses the target cell according to the redirection information, and starts to initiate a voice service.
  • Example 2 The UE accesses the target cell according to the redirection information, and starts to initiate a voice service.
  • the method for implementing voice service fallback when the eCSFB is switched from the E-UTRAN to the lxRTT network in the embodiment includes:
  • the UE reports a measurement report to the eNodeB in the measurement-based eCSFB process
  • This step is optional. If it is a blind eCSFB process, this step does not exist.
  • the eNodeB determines to send an ECSTB to the eCSFB concurrent PS handover procedure of the E-UTRAN to the lxRTT network, and sends a Handover From EUTRA Preparation Request message to the UE.
  • the UE sends a start message to the lxRTT network according to the indication of the eNodeB in the Handover From EUTRA Preparation Request message, and sends an uplink handover preparation (UL Handover Preparation Transfer) message to the eNodeB.
  • UL Handover Preparation Transfer uplink handover preparation
  • the UE sends a handover request to the HRPD network according to the indication of the eNodeB in the Handover From EUTRA Preparation Request message, and sends an uplink handover preparation (UL Handover Preparation Transfer) message to the eNodeB.
  • UL Handover Preparation Transfer uplink handover preparation
  • the eNodeB receives the uplink handover direct transmission message sent by the UE to the lxRTT network, and the eNodeB transparently transmits the message, and sends an uplink SI CDMA2000 tunnel direct transmission (UPLINK SI CDMA2000 TUNNELING) message to the MME, and the eNodeB starts a timer to wait for the downlink S1 CDMA2000 of the MME.
  • Tunnel direct transmission (DL SI CDMA 2000 TUNNELING) message;
  • the eNodeB receives the uplink handover direct transmission message sent by the UE to the HRPD network, and the eNodeB transparently transmits the message, and sends an uplink SI CDMA2000 tunnel direct transmission (UPLINK SI CDMA2000 TUNNELING) message to the MME, and the eNodeB starts a timer to wait for the downlink SI CDMA2000 of the MME.
  • Tunnel direct transmission (DL SI CDMA2000 TUNNELING) message;
  • the MME and the lxRTT network interact, the lxRTT network returns a failure message, and the downlink SI CDMA2000 tunnel direct transmission (DL SI CDMA2000 TUNNELING) message sent by the MME to the eNodeB carries a failure indication;
  • DL SI CDMA2000 TUNNELING downlink SI CDMA2000 tunnel direct transmission
  • the MME interacts with the HRPD network, the HRPD network returns a failure message, and the MME sends a downlink SI CDMA2000 tunnel direct transmission (DL SI CDMA2000 TUNNELING) message to The eNodeB carries a failure indication;
  • the eNodeB receives the two downlink SI CDMA2000 tunnel direct transmission (DL S1 CDMA2000 TUNNELING) messages of the MME, and learns that the HRPD network handover and the eCSFB to the IxRTT network fail, the eNodeB sends an RRC Connection Release message to the UE, and the message carries the target. Redirecting information of the HRPD network cell and the target IxRTT network cell, redirecting the CS service of the UE to the target IxRTT network cell, and redirecting the PS service of the UE to the target HRPD network cell, so that the UE can initiate the CS service faster.
  • the PS business is also the most continuous.
  • the eCSFB concurrency from the E-UTRAN to the IxRTT network in this embodiment is shown.
  • the method for implementing the voice service fallback includes:
  • the UE reports a Measurement Report to the eNodeB;
  • This step is optional. If it is a blind eCSFB process, this step does not exist.
  • the eNodeB decides to send the ECSTB to the ICSRT network to the eCSFB concurrent PS handover procedure, and sends a Handover From EUTRA Preparation Request message to the UE.
  • the UE sends a start message to the IxRTT network according to the eNodeB indication in the Handover From EUTRA Preparation Request message, and sends an uplink handover direct transfer (UL Handover Preparation Transfer) message to the eNodeB.
  • UL Handover Preparation Transfer uplink handover direct transfer
  • the UE initiates a handover request to the HRPD network according to the indication of the eNodeB in the Handover From EUTRA Preparation Request message, and sends an uplink handover preparation (UL Handover Preparation Transfer) message to the eNodeB.
  • UL Handover Preparation Transfer uplink handover preparation
  • the eNodeB receives the uplink handover direct transmission message sent by the UE to the IxRTT network, and the eNodeB transparently transmits the message, and sends an uplink SI CDMA2000 tunnel direct transmission (UPLINK SI CDMA2000 TUNNELING) message to the MME, and the eNodeB starts a timer to wait for the downlink SI CDMA2000 of the MME.
  • Tunnel direct messaging DL SI CDMA 2000 TUNNELING
  • the eNodeB receives the uplink handover direct transmission message sent by the UE to the HRPD network, and the eNodeB Transmitting the message, sending an uplink SI CDMA2000 tunnel direct transmission (UPLINK SI CDMA2000 TUNNELING) message to the MME, and the eNodeB starts a timer to wait for the MME's downlink S1 CDMA2000 tunnel direct transmission (DL SI CDMA2000 TUNNELING) message;
  • UPLINK SI CDMA2000 TUNNELING uplink SI CDMA2000 tunnel direct transmission
  • DL SI CDMA2000 TUNNELING downlink SI CDMA2000 tunnel direct transmission
  • the eNodeB does not receive the S1 CDMA2000 tunnel direct transmission (DL SI CDMA2000 TUNNELING) message sent by the MME of the lxRTT network in the timer;
  • the MME and the HRPD network interact, the HRPD network returns successfully, and the MME sends a downlink SI CDMA2000 tunnel direct transmission (DL SI CDMA2000 TUNNELING) message to the eNodeB to carry a success indication;
  • DL SI CDMA2000 TUNNELING downlink SI CDMA2000 tunnel direct transmission
  • the eNodeB receives the downlink S1 CDMA2000 tunnel direct transmission message of the MME about the HRPD network in the timer, but does not receive the S1 CDMA2000 tunnel direct transmission message of the MME about the lxRTT network, and the eNode sends a MobilityFromEUTRAComman (Handover Command) message to the UE, carrying
  • the information from the HRPD network includes the redirection information of the target lxRTT network cell in the redirection information, and redirects the CS service of the UE to the target lxRTT network cell, and the PS service of the UE continues in the HRPD network, so that the UE can be faster.
  • the CS business is initiated, and the PS business can continue.
  • the redirection information of the target lxRTT network cell is from the measurement report reported by the UE in step 301.
  • the method for implementing the voice service fallback when the eCSFB is switched from the E-UTRAN to the lxRTT network in the embodiment includes:
  • the UE reports a measurement report to the eNodeB in the measurement-based eCSFB process
  • This step is optional. If it is a blind eCSFB process, this step does not exist.
  • the eNodeB decides to send an ECSUT to the eCSFB concurrent PS handover procedure of the E-UTRAN to the 1XRTT network, and sends a Handover From EUTRA Preparation Request message to the UE.
  • the UE sends a start message to the lxRTT network according to the indication of the eNodeB in the Handover From EUTRA Preparation Request message, and sends an uplink switching direct transmission to the eNodeB.
  • Handover Preparation Transfer )
  • the UE sends a handover request to the HRPD network according to the indication of the eNodeB in the Handover From EUTRA Preparation Request message, and sends an uplink handover preparation (UL Handover Preparation Transfer) message to the eNodeB.
  • UL Handover Preparation Transfer uplink handover preparation
  • the eNodeB receives the uplink handover preparation message sent by the UE to the lxRTT network, and the eNodeB transparently transmits the message, and sends an uplink SI CDMA2000 tunnel direct transmission (UPLINK SI CDMA2000 TUNNELING) message to the MME, and the eNodeB starts a timer to wait for the downlink SI CDMA2000 tunnel of the MME.
  • Direct transmission (DL SI CDMA 2000 TUNNELING) message;
  • the eNodeB receives the uplink handover preparation message sent by the UE to the HRPD network, and the eNodeB transparently transmits the message, and sends an uplink S1 CDMA2000 tunnel direct transmission message (UPLINK S1 CDMA2000 TUNNELING) to the MME, and the eNodeB starts a timer to wait for the downlink SI of the MME.
  • CDMA2000 tunnel direct transmission DL SI CDMA2000 TUNNELING
  • the eNodeB receives a downlink SI CDMA2000 tunnel direct transmission (DL SI CDMA2000 TUNNELING) message sent by the MME of the lxRTT network, where the message indicates that the eCSFB to the lxRTT network succeeds;
  • DL SI CDMA2000 TUNNELING downlink SI CDMA2000 tunnel direct transmission
  • the MME and the HRPD network interact, the HRPD network returns a failure message, and the MME sends a downlink SI CDMA2000 tunnel direct transmission (DL SI CDMA2000 TUNNELING) to the eNodeB carrying a failure indication; or the eNodeB does not receive the downlink S1 CDMA2000 tunnel sent by the MME in the timer.
  • Direct messaging DL SI CDMA2000 TUNNELING ) ;
  • the eNode sends a Mobility From EUTRA Command message to the UE, where the message carries the information of the lxRTT network, and the redirection information includes the redirection information of the target HRPD network cell, and redirects the PS service of the UE to the target HPRD network cell.
  • the UE's CS service continues on the lxRTT network, enabling the UE to initiate the CS service faster, and the PS service can continue.
  • the redirection information of the target HRPD network cell is from the same coverage HRPD network cell information that is measured by the UE in step 101 or included in the background.
  • the embodiment further provides an apparatus for implementing a fallback of a voice service, including: A judgment unit and a failure processing unit, wherein:
  • the determining unit is configured to determine, in the process of enhancing the voice service fallback (eCSFB), whether the processing failure occurs on the network side;
  • the failure processing unit is configured to send an indication message to the user equipment to indicate that the user equipment is redirected to the target cell when the processing failure occurs on the network side.
  • the failure processing unit is configured to send the radio resource control to the user equipment when the user equipment fails to process from the evolved terrestrial radio access network (E-UTRAN) to the lx wireless communication (IxRTT) network.
  • the (RRC) connection release message carries the redirection information of the target IxRTT network cell in the RRC connection release message, indicating that the user equipment is redirected to the target IxRTT network cell.
  • the failure processing unit is configured to send an RRC connection release to the user equipment when the processing fails on the network side in the process of the user equipment falling back from the E-UTRAN to the IxRTT network and the concurrent packet switched domain (PS) handover.
  • the message carries the redirection information of the target IxRTT network cell and the redirection information of the target high-speed packet data (HRPD) network cell in the RRC connection release message, instructing the user equipment to redirect the voice service to the target IxRTT network cell, and the PS service is heavy. Directed to the target HRPD network cell.
  • the failure processing unit is configured to perform processing failure on the network side when the user equipment falls back from the E-UTRAN to the IxRTT network, and sends Mobility From EUTRA to the user equipment when no processing failure occurs on the network side during the concurrent PS handover.
  • the Command (Handover Command) message carries the redirection information of the target IxRTT network cell and the information of the HRPD network in the Mobility From EUTRA Command message, instructing the user equipment to redirect the voice service to the target IxRTT network cell, and continue in the current HRPD network. In the PS business.
  • the failure processing unit is configured to not process failure on the network side in the process of the user equipment falling back from the E-UTRAN to the IxRTT network.
  • the Mobility From EUTRA is sent to the user equipment.
  • the Command message carries the redirection information of the target HRPD network cell and the information of the IxRTT network in the Mobility From EUTRA Command message, instructing the user equipment to redirect the PS service to the target HRPD network cell, and continue to perform voice service in the current IxRTT network.
  • a program to instruct the associated hardware such as a read only memory, a magnetic disk, or an optical disk.
  • each module/unit in the foregoing embodiment may be implemented in the form of hardware, or may be implemented in the form of a software function module.
  • the invention is not limited to any specific form of combination of hardware and software.
  • the embodiment of the invention enables the UE to initiate the voice service at the fastest speed, and at the same time, the data service is deep and the time is shortened, the user experience is improved, and the eCSFB or eCSFB concurrent PS handover process is optimized.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

本发明实施例公开了一种实现语音业务回落的方法及装置，包括：在eCSFB的过程中，eNodeB在获知网络侧发生处理失败时，向用户设备发送指示消息，指示用户设备重定向到目标小区。本发明在网络侧处理失败的场景下，通过重定向方式将UE重定向到1xRTT的目标小区（eCSFB流程）或1xRTT的目标小区和HRPD网络的目标小区（eCSFB并发PS切换流程），使UE能以最快速度发起语音业务，同时数据业务深沟时长缩小，提高用户体验，优化了eCSFB或eCSFB并发PS切换流程。

Description

一种实现语音业务回落的方法及装置 技术领域
本发明涉及移动通讯技术领域， 尤其涉及一种实现语音业务回落的方法 及装置。
背景技术
LTE ( Long Term Evolved, 长期演进） 网络在某些情况下 （如 LTE网络 不支持 VoIMS ) , 不支持语音业务， 因此， UE ( User Equipment, 用户设备） 在需要发起语音业务时， LTE网络会将 UE回落到支持语音业务的 lxRTT( lx Radio Telecommunication Technology, lx无线通讯） 网络， 称之为 eCSFB ( Enhanced Circuit Switched Fallback, 增强语音业务回落）过程。 如果此时 UE同时存在 PS (分组交换）业务， eNodeB (演进的节点 B )根据策略会将 UE的 PS业务同时切换到 HRPD(高速分组数据 )网络,这个过程称为 eCSFB 并发 PS切换过程。
在 eCSFB过程中，由于 lxRTT网络或 MME处理失败，可能会导致 eCSFB 过程失败， 此时相关技术处理中 eNodeB发送下行直传消息到 UE, eNodeB 对这种失败不做任何处理。
在 eCSFB并发 PS切换过程中， 由于 HRPD网络或 lxRTT网络或 MME 处理错误， 导致 eCSFB并发 PS切换到 HRPD流程处理失败， 在这种失败情 况下 , eNodeB同样对这种失败不 #丈任何处理。
综合来讲， 相关技术中 eNodeB 的处理是对失败不多处理， 仅仅透传失 败指示给 UE 。这样处理的缺陷是 UE发起 CS呼叫时长延长，如果同时存在 PS业务， 那么 PS业务中断时间延长， 数据深沟明显， 用户体验感降低。
发明内容
本发明实施例提供一种实现语音业务回落的方法及装置， 能够在语音业 务回落过程中网络侧发生处理失败时， 使用户仍能进行 CS及 PS业务。 本发明实施例的一种实现语音业务回落的方法， 包括：
在增强语音业务回落 (eCSFB)的过程中， 演进的节点 B(eNodeB)在获知网 络侧发生处理失败时， 向用户设备发送指示消息， 指示用户设备重定向到目 标小区。
较佳地， 向用户设备发送指示消息， 指示用户设备重定向到目标小区， 包括：
在用户设备从演进的陆地无线接入网（E-UTRAN)回落到 lx 无线通讯 (IxRTT)网络的过程中， 网络侧发生处理失败时， 所述 eNodeB向用户设备发 送无线资源控制 (RRC)连接释放消息， 在 RRC 连接释放消息中携带目标 IxRTT网络小区的重定向信息，指示用户设备重定向到目标 IxRTT网络小区。
较佳地， 向用户设备发送指示消息， 指示用户设备重定向到目标小区， 包括：
在用户设备从 E-UTRAN回落到 IxRTT网络的过程中以及并发的分组交 换域 (PS)切换的过程中， 网络侧均发生处理失败时， 所述 eNodeB向用户设备 发送 RRC连接释放消息， 在 RRC连接释放消息中携带目标 IxRTT网络小区 的重定向信息和目标高速分组数据 (HRPD)网络小区的重定向信息， 指示用户 设备将语音业务重定向到目标 IxRTT 网络小区， 将 PS 业务重定向到目标 HRPD网络小区。
较佳地， 向用户设备发送指示消息， 指示用户设备重定向到目标小区， 包括：
在用户设备从 E-UTRAN回落到 IxRTT网络的过程中网络侧发生处理失 败， 并发的 PS切换的过程中网络侧未发生处理失败时， 所述 eNodeB向用户 设备发送 Mobility From EUTRA Command (切换命令 )消息，在 Mobility From EUTRA Command消息中携带目标 IxRTT网络小区的重定向信息和 HRPD网 络的信息， 指示用户设备将语音业务重定向到目标 IxRTT网络小区， 并继续 在当前的 HRPD网络中进行 PS业务。
较佳地， 向用户设备发送指示消息， 指示用户设备重定向到目标小区， 包括： 在用户设备从 E-UTRAN回落到 IxRTT网络的过程中网络侧未发生处理 失败， 并发的 PS切换的过程中网络侧发生处理失败时， 所述 eNodeB向用户 设备发送 Mobility From EUTRA Command消息， 在 Mobility From EUTRA Command消息中携带目标 HRPD网络小区的重定向信息和 IxRTT网络的信 息， 指示用户设备将 PS业务重定向到目标 HRPD网络小区， 并继续在当前 的 IxRTT网络中进行语音业务。
本发明实施例的一种实现语音业务回落的装置， 包括： 判断单元和失败 处理单元， 其中：
所述判断单元， 设置为： 在增强语音业务回落 (eCSFB)的过程中， 判断网 络侧是否发生处理失败；
所述失败处理单元， 设置为： 在网络侧发生处理失败时， 向用户设备发 送指示消息， 指示用户设备重定向到目标小区。
较佳地， 所述失败处理单元， 是设置为： 在用户设备从演进的陆地无线 接入网 (E-UTRAN)回落到 lx无线通讯 (IxRTT)网络的过程中， 网络侧发生处 理失败时， 向用户设备发送无线资源控制 (RRC)连接释放消息， 在 RRC连接 释放消息中携带目标 IxRTT网络小区的重定向信息， 指示用户设备重定向到 目标 IxRTT网络小区。
较佳地， 所述失败处理单元， 是设置为： 在用户设备从 E-UTRAN回落 到 IxRTT网络的过程中以及并发的分组交换域 (PS)切换的过程中， 网络侧均 发生处理失败时， 向用户设备发送 RRC连接释放消息， 在 RRC连接释放消 息中携带目标 IxRTT 网络小区的重定向信息和目标高速分组数据 (HRPD)网 络小区的重定向信息， 指示用户设备将语音业务重定向到目标 IxRTT网络小 区， 将 PS业务重定向到目标 HRPD网络小区。
较佳地， 所述失败处理单元， 是设置为： 在用户设备从 E-UTRAN回落 到 IxRTT网络的过程中网络侧发生处理失败， 在并发的 PS切换的过程中网 络侧未发生处理失败时，向用户设备发送 Mobility From EUTRA Command(切 换命令 )消息， 在 Mobility From EUTRA Command消息中携带目标 IxRTT网 络小区的重定向信息和 HRPD网络的信息， 指示用户设备将语音业务重定向 到目标 IxRTT网络小区， 并继续在当前的 HRPD网络中进行 PS业务。 较佳地， 所述失败处理单元， 是设置为： 在用户设备从 E-UTRAN回落 到 IxRTT网络的过程中网络侧未发生处理失败， 在并发的 PS切换的过程中 网络侧发生处理失败时 , 向用户设备发送 Mobility From EUTRA Command消 息， 在 Mobility From EUTRA Command消息中携带目标 HRPD网络小区的重 定向信息和 IxRTT网络的信息，指示用户设备将 PS业务重定向到目标 HRPD 网络小区， 并继续在当前的 IxRTT网络中进行语音业务。
综上所述， 本发明实施例在网络侧处理失败的场景下， 通过重定向方式 将 UE重定向到 IxRTT的目标小区 （ eCSFB流程 )或 IxRTT的目标小区和 HRPD网络的目标小区（ eCSFB并发 PS切换流程）， 使 UE能以最快速度发 起语音业务， 同时数据业务深沟时长缩小， 提高用户体验， 优化了 eCSFB或 eCSFB并发 PS切换流程。 附图概述
图 1为本发明的实现语音业务回落的方法的实施例 1的流程图； 图 2为本发明的实现语音业务回落的方法的实施例 2的流程图； 图 3为本发明的实现语音业务回落的方法的实施例 3的流程图； 图 4为本发明的实现语音业务回落的方法的实施例 4的流程图； 图 5为本发明实施例的实现语音业务回落的装置的架构图。 本发明的较佳实施方式
本实施方式在网络侧处理失败时， 通过向 UE发送指示消息， 指示 UE 重定向到目标小区， 在 eCSFB流程中， 重定向到目标 IxRTT网络小区， 在 eCSFB并发 PS切换流程中， 重定向到目标 IxRTT网络小区和 /或目标 HRPD 网络小区。
下文中将结合附图对本发明的实施例进行详细说明。 需要说明的是， 在 不冲突的情况下， 本申请中的实施例及实施例中的特征可以相互任意组合。
实施例 1 : 如图 1所示， 为本实施方式从 E-UTRAN到 IxRTT网络时， 实现语音业 务回落的方法， 包括：
101 : 在基于测量的 eCSFB 过程中， UE 向 eNodeB 上报测量报告 ( Measurement Report ) ；
此步骤为可选步骤， 如果是盲 eCSFB过程， 则此步骤不存在。
102: eNodeB决策对 UE发起 E-UTRAN到 IxRTT网络的 eCSFB流程， 向 UE发送切换准备 ( Handover From EUTRA Preparation Request ) 消息；
103: UE根据 eNodeB的指示发起起呼，向 eNodeB发送上行切换直传（ UL Handover Preparation Transfer ) 消息；
104: eNodeB透传 UE的上行切换直传消息， 发送上行 SI CDMA2000 隧道直传（ UPLINK SI CDMA2000 TUNNELING )消息到 MME, eNodeB启 动定时器等待 MME 的下行 SI CDMA2000 隧道直传（DL SI CDMA2000 TUNNELING )消息；如果定时超时还没有接收到 MME的下行 SI CDMA2000 隧道直传消息， 直接执行步骤 108;
105: MME透传 eNodeB的上行 S 1 CDMA2000隧道直传消息，发送 S 102 直传消息到 IWS ( Interworking solution, 交互解决）节点；
106: IWS节点处理失败， 在 S102直传消息中包含处理失败信息， 发送 S102直传消息到 MME;
107: MME透传 S102直传消息， 发送下行 SI CDMA2000隧道直传消息 到 eNodeB , 包含 IxRTT网络的资源及被叫振铃响应；
108: eNodeB通过下行 SI CDMA2000隧道直传消息或者定时器超时消 息得知 eCSFB失败， 为了使 UE尽快发起语音业务， eNodeB发送 RRC (无 线资源控制）连接释放（ RRC Connection Release )消息，消息中携带目标 IxRTT 网络小区的重定向信息， 将 UE快速重定向到目标 IxRTT网络小区；
在上述步骤 104 107步中任何一步存在失败时， eNodeB均将 UE重定向 到目标 IxRTT网络小区。
109: UE根据重定向信息， 在目标小区接入， 开始发起语音业务。 实施例 2:
如图 2所示， 为本实施方式从 E-UTRAN到 lxRTT网络的 eCSFB并发 PS切换时， 实现语音业务回落的方法， 包括：
201： 在基于测量的 eCSFB 过程， UE 向 eNodeB 上报测量报告 (Measurement Report);
此步骤为可选步骤， 如果是盲 eCSFB过程， 则此步骤不存在。
202: eNodeB决策对 UE发起 E-UTRAN到 lxRTT网络的 eCSFB并发 PS 切换流程， 向 UE发送切换准备 ( Handover From EUTRA Preparation Request ) 消息；
203: UE根据 Handover From EUTRA Preparation Request消息中 eNodeB 的指示， 向 lxRTT 网络发起起呼消息， 向 eNodeB发送上行切换直传（UL Handover Preparation Transfer ) 消息；
204: UE根据 Handover From EUTRA Preparation Request消息中 eNodeB 的指示， 向 HRPD 网络发起切换请求， 向 eNodeB发送上行切换直传（UL Handover Preparation Transfer ) 消息；
205: eNodeB接收到 UE发往 lxRTT网络的上行切换直传消息， eNodeB 透传该消息， 发送上行 SI CDMA2000 隧道直传（UPLINK SI CDMA2000 TUNNELING ) 消息到 MME , eNodeB 启动定时器等待 MME 的下行 S1 CDMA2000隧道直传（ DL SI CDMA 2000 TUNNELING ) 消息；
206： eNodeB接收到 UE发往 HRPD网络的上行切换直传消息， eNodeB 透传该消息， 发送上行 SI CDMA2000 隧道直传（UPLINK SI CDMA2000 TUNNELING ) 消息到 MME , eNodeB 启动定时器等待 MME 的下行 SI CDMA2000隧道直传（ DL SI CDMA2000 TUNNELING ) 消息；
207: MME和 lxRTT网络交互， lxRTT网络返回失败消息， MME发送 的下行 SI CDMA2000隧道直传（DL SI CDMA2000 TUNNELING ) 消息到 eNodeB携带失败指示；
208: MME和 HRPD网络交互， HRPD网络返回失败消息， MME发送 下行 SI CDMA2000 隧道直传（DL SI CDMA2000 TUNNELING ) 消息到 eNodeB携带失败指示；
209: eNodeB接收到 MME的两条下行 SI CDMA2000隧道直传（ DL S1 CDMA2000 TUNNELING )消息， 得知到 HRPD网络切换和到 IxRTT网络的 eCSFB失败， eNodeB发送 RRC Connection Release消息给 UE , 消息中携带 目标 HRPD网络小区和目标 IxRTT网络小区的重定向信息， 将 UE的 CS业 务重定向到目标 IxRTT网络小区 ,同时将 UE的 PS业务重定向到目标 HRPD 网络小区， 使得 UE能更快的发起 CS业务， 同时 PS业务也最大程度连续。
实施例 3:
如图 3所示， 为本实施方式从 E-UTRAN到 IxRTT网络的 eCSFB并发
PS切换时， 实现语音业务回落的方法， 包括：
301 : 在基于测量的 eCSFB 过程中， UE 向 eNodeB 上报测量报告 ( Measurement Report ) ；
此步骤为可选步骤， 如果是盲 eCSFB过程， 则此步骤不存在。
302: eNodeB决策对 UE发起 E-UTRAN到 IxRTT网络的 eCSFB并发 PS 切换流程， 向 UE发送切换准备 ( Handover From EUTRA Preparation Request ) 消息；
303: UE根据 Handover From EUTRA Preparation Request消息中 eNodeB 指示， 向 IxRTT 网络发起起呼消息， 向 eNodeB 发送上行切换直传 （ UL Handover Preparation Transfer ) 消息；
304: UE根据 Handover From EUTRA Preparation Request消息中 eNodeB 的指示， 向 HRPD 网络发起切换请求， 向 eNodeB发送上行切换直传（UL Handover Preparation Transfer ) 消息；
305: eNodeB接收到 UE发往 IxRTT网络的上行切换直传消息， eNodeB 透传该消息， 发送上行 SI CDMA2000 隧道直传（UPLINK SI CDMA2000 TUNNELING ) 消息到 MME, eNodeB 启动定时器等待 MME 的下行 SI CDMA2000隧道直传消息 （ DL SI CDMA 2000 TUNNELING ) 消息；
306： eNodeB接收到 UE发往 HRPD网络的上行切换直传消息， eNodeB 透传该消息， 发送上行 SI CDMA2000 隧道直传（UPLINK SI CDMA2000 TUNNELING ) 消息到 MME, eNodeB 启动定时器等待 MME 的下行 S1 CDMA2000隧道直传（ DL SI CDMA2000 TUNNELING ) 消息；
307: eNodeB 在定时器内没有接收到 lxRTT 网络的 MME发送的 S1 CDMA2000隧道直传（ DL SI CDMA2000 TUNNELING ) 消息；
308: MME和 HRPD网络交互， HRPD网络返回成功， MME发送下行 SI CDMA2000隧道直传（DL SI CDMA2000 TUNNELING ) 消息到 eNodeB 携带成功指示；
309 : eNodeB 在定时器内接收到 MME 关于 HRPD 网络的下行 S1 CDMA2000 隧道直传消息， 但没有收到 MME 关于 lxRTT 网络的 S1 CDMA2000隧道直传消息， eNode发送 MobilityFromEUTRAComman (切换 命令） 消息给 UE, 携带来自 HRPD 网络的信息， 同时在重定向信息中包含 目标 lxRTT网络小区的重定向信息， 将 UE的 CS业务重定向到目标 lxRTT 网络小区， 同时 UE的 PS业务在 HRPD网络继续， 使得 UE能更快的发起 CS业务， 同时 PS业务也能继续。
目标 lxRTT网络小区的重定向信息来自步骤 301中 UE上报的测量报告。
实施例 4:
如图 4所示， 为本实施方式从 E-UTRAN到 lxRTT网络的 eCSFB并发 PS切换时， 实现语音业务回落的方法， 包括：
401： 在基于测量的 eCSFB 过程， UE 向 eNodeB 上报测量报告 (Measurement Report);
此步骤为可选步骤， 如果是盲 eCSFB过程， 则此步骤不存在。
402: eNodeB决策对 UE发起 E-UTRAN到 1XRTT网络的 eCSFB并发 PS 切换流程， 向 UE发送切换准备 ( Handover From EUTRA Preparation Request ) 消息；
403： UE根据 Handover From EUTRA Preparation Request消息中 eNodeB 的指示， 向 lxRTT 网络发起起呼消息， 向 eNodeB发送上行切换直传（UL Handover Preparation Transfer ) 消息；
404: UE根据 Handover From EUTRA Preparation Request消息中 eNodeB 的指示， 向 HRPD 网络发起切换请求， 向 eNodeB发送上行切换直传（UL Handover Preparation Transfer ) 消息；
405： eNodeB接收到 UE发往 lxRTT网络的上行切换准备消息， eNodeB 透传该消息， 发送上行 SI CDMA2000 隧道直传（UPLINK SI CDMA2000 TUNNELING ) 消息到 MME, eNodeB 启动定时器等待 MME 的下行 SI CDMA2000隧道直传（ DL SI CDMA 2000 TUNNELING ) 消息；
406: eNodeB接收到 UE发往 HRPD网络的上行切换准备消息， eNodeB 透传该消息，发送上行 S 1 CDMA2000隧道直传消息（ UPLINK S 1 CDMA2000 TUNNELING )到 MME, eNodeB启动定时器等待 MME的下行 SI CDMA2000 隧道直传（ DL SI CDMA2000 TUNNELING ) 消息；
407: eNodeB接收到关于 lxRTT网络的 MME发送的下行 SI CDMA2000 隧道直传（DL SI CDMA2000 TUNNELING ) 消息， 该消息指示 eCSFB到 lxRTT网络成功；
408: MME和 HRPD网络交互， HRPD网络返回失败消息， MME发送 下行 SI CDMA2000隧道直传（ DL SI CDMA2000 TUNNELING )到 eNodeB 携带失败指示； 或 eNodeB 在定时器内没有接收到 MME发送的下行 S1 CDMA2000隧道直传消息 （ DL SI CDMA2000 TUNNELING ) ；
409: eNode发送 Mobility From EUTRA Command消息给 UE, 消息中携 带 lxRTT网络的信息， 同时在重定向信息中包含目标 HRPD网络小区的重定 向信息， 将 UE的 PS业务重定向到目标 HPRD网络小区， 同时 UE的 CS业 务在 lxRTT网络继续， 使得 UE能更快的发起 CS业务， 同时 PS业务也能继 续。
目标 HRPD网络小区的重定向信息来自步骤 101中 UE上报的测量包括 或后台配置的同覆盖 HRPD网络小区信息。
如图 5所示， 本实施方式还提供了一种实现语音业务回落的装置， 包括: 判断单元和失败处理单元， 其中：
判断单元，设置为在增强语音业务回落 (eCSFB)的过程中， 判断网络侧是 否发生处理失败；
失败处理单元， 设置为在网络侧发生处理失败时， 向用户设备发送指示 消息， 指示用户设备重定向到目标小区。
失败处理单元， 是设置为在用户设备从演进的陆地无线接入网 (E-UTRAN)回落到 lx无线通讯 (IxRTT)网络的过程中， 网络侧发生处理失败 时， 向用户设备发送无线资源控制 (RRC)连接释放消息， 在 RRC连接释放消 息中携带目标 IxRTT 网络小区的重定向信息， 指示用户设备重定向到目标 IxRTT网络小区。
失败处理单元， 是设置为在用户设备从 E-UTRAN回落到 IxRTT网络的 过程中以及并发的分组交换域 (PS)切换的过程中， 网络侧均发生处理失败时， 向用户设备发送 RRC连接释放消息，在 RRC连接释放消息中携带目标 IxRTT 网络小区的重定向信息和目标高速分组数据 (HRPD)网络小区的重定向信息， 指示用户设备将语音业务重定向到目标 IxRTT网络小区， 将 PS业务重定向 到目标 HRPD网络小区。
失败处理单元， 是设置为在用户设备从 E-UTRAN回落到 IxRTT网络的 过程中网络侧发生处理失败，在并发的 PS切换的过程中网络侧未发生处理失 败时， 向用户设备发送 Mobility From EUTRA Command (切换命令 ) 消息， 在 Mobility From EUTRA Command消息中携带目标 IxRTT网络小区的重定向 信息和 HRPD网络的信息，指示用户设备将语音业务重定向到目标 IxRTT网 络小区， 并继续在当前的 HRPD网络中进行 PS业务。
失败处理单元， 是设置为在用户设备从 E-UTRAN回落到 IxRTT网络的 过程中网络侧未发生处理失败，在并发的 PS切换的过程中网络侧发生处理失 败时，向用户设备发送 Mobility From EUTRA Command消息，在 Mobility From EUTRA Command消息中携带目标 HRPD网络小区的重定向信息和 IxRTT网 络的信息， 指示用户设备将 PS业务重定向到目标 HRPD网络小区， 并继续 在当前的 IxRTT网络中进行语音业务。 本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序 来指令相关硬件完成， 所述程序可以存储于计算机可读存储介质中， 如只读 存储器、 磁盘或光盘等。 可选地， 上述实施例的全部或部分步骤也可以使用 一个或多个集成电路来实现。 相应地， 上述实施例中的各模块 /单元可以釆用 硬件的形式实现， 也可以釆用软件功能模块的形式实现。 本发明不限制于任 何特定形式的硬件和软件的结合。
脱离本发明的精神和范围。 这样， 倘若对本发明实施例的这些修改和变型属 于本发明的权利要求及其等同技术的范围之内， 则本发明也意图包含这些改 动和变型在内。
工业实用性
本发明实施例使 UE能以最快速度发起语音业务， 同时数据业务深沟时 长缩小， 提高用户体验， 优化了 eCSFB或 eCSFB并发 PS切换流程。

Claims

权 利 要 求 书
1、 一种实现语音业务回落的方法， 包括：
在增强语音业务回落 (eCSFB)的过程中， 演进的节点 B(eNodeB)在获知网 络侧发生处理失败时， 向用户设备发送指示消息， 指示所述用户设备重定向 到目标小区。
2、 如权利要求 1所述的方法， 其中， 向用户设备发送指示消息， 指示 所述用户设备重定向到目标小区， 包括：
在所述用户设备从演进的陆地无线接入网 (E-UTRAN)回落到 lx无线通 讯 (IxRTT)网络的过程中， 所述网络侧发生处理失败时， 所述 eNodeB向所述 用户设备发送无线资源控制 (RRC)连接释放消息， 在所述 RRC连接释放消息 中携带目标 IxRTT网络小区的重定向信息， 指示所述用户设备重定向到所述 目标 IxRTT网络小区。
3、 如权利要求 1所述的方法， 其中， 向用户设备发送指示消息， 指示 所述用户设备重定向到目标小区， 包括：
在所述用户设备从 E-UTRAN回落到 IxRTT网络的过程中以及并发的分 组交换 (PS)切换的过程中， 所述网络侧均发生处理失败时， 所述 eNodeB向所 述用户设备发送 RRC连接释放消息， 在所述 RRC连接释放消息中携带目标 1 xRTT 网络小区的重定向信息和目标高速分组数据 (HRPD)网络小区的重定 向信息， 指示所述用户设备将语音业务重定向到所述目标 IxRTT网络小区， 将 PS业务重定向到所述目标 HRPD网络小区。
4、 如权利要求 1所述的方法， 其中， 向用户设备发送指示消息， 指示 所述用户设备重定向到目标小区， 包括：
在所述用户设备从 E-UTRAN回落到 IxRTT网络的过程中所述网络侧发 生处理失败， 并发的 PS切换的过程中所述网络侧未发生处理失败时， 所述 eNodeB 向用户设备发送 Mobility From EUTRA Command 消息， 在所述 Mobility From EUTRA Command消息中携带目标 IxRTT网络小区的重定向信 息和 HRPD 网络的信息， 指示所述用户设备将语音业务重定向到所述目标 IxRTT网络小区， 并继续在当前的 HRPD网络中进行 PS业务。
5、 如权利要求 1所述的方法， 其中， 向用户设备发送指示消息， 指示 所述用户设备重定向到目标小区， 包括：
在所述用户设备从 E-UTRAN回落到 IxRTT网络的过程中网络侧未发生 处理失败，并发的 PS切换的过程中所述网络侧发生处理失败时，所述 eNodeB 向用户设备发送 Mobility From EUTRA Command消息， 在所述 Mobility From EUTRA Command消息中携带目标 HRPD网络小区的重定向信息和 IxRTT网 络的信息， 指示所述用户设备将 PS业务重定向到所述目标 HRPD网络小区， 并继续在当前的 IxRTT网络中进行语音业务。
6、 一种实现语音业务回落的装置， 包括： 判断单元和失败处理单元， 其中：
所述判断单元， 设置为： 在增强语音业务回落 (eCSFB)的过程中， 判断网 络侧是否发生处理失败；
所述失败处理单元， 设置为： 在网络侧发生处理失败时， 向用户设备发 送指示消息， 指示用户设备重定向到目标小区。
7、 如权利要求 6所述的装置， 其中：
所述失败处理单元是设置为： 在所述用户设备从演进的陆地无线接入网 (E-UTRAN)回落到 lx无线通讯 (IxRTT)网络的过程中， 所述网络侧发生处理 失败时，向所述用户设备发送无线资源控制 (RRC)连接释放消息，在所述 RRC 连接释放消息中携带目标 IxRTT网络小区的重定向信息， 指示用户设备重定 向到所述目标 IxRTT网络小区。
8、 如权利要求 6所述的装置， 其中：
所述失败处理单元是设置为：在所述用户设备从 E-UTRAN回落到 IxRTT 网络的过程中以及并发的分组交换 (PS)切换的过程中， 所述网络侧均发生处 理失败时， 向所述用户设备发送 RRC连接释放消息， 在所述 RRC连接释放 消息中携带目标 IxRTT 网络小区的重定向信息和目标高速分组数据 (HRPD) 网络小区的重定向信息， 指示所述用户设备将语音业务重定向到所述目标 IxRTT网络小区， 将 PS业务重定向到所述目标 HRPD网络小区。
9、 如权利要求 6所述的装置， 其中： 所述失败处理单元是设置为：在所述用户设备从 E-UTRAN回落到 lxRTT 网络的过程中所述网络侧发生处理失败，在并发的 PS切换的过程中所述网络 侧未发生处理失败时，向用户设备发送 Mobility From EUTRA Command消息 , 在所述 Mobility From EUTRA Command消息中携带目标 lxRTT网络小区的重 定向信息和 HRPD网络的信息， 指示所述用户设备将语音业务重定向到所述 目标 lxRTT网络小区， 并继续在当前的 HRPD网络中进行 PS业务。
10、 如权利要求 6所述的装置， 其中：
所述失败处理单元是设置为：在所述用户设备从 E-UTRAN回落到 lxRTT 网络的过程中所述网络侧未发生处理失败，在并发的 PS切换的过程中所述网 络侧发生处理失败时 , 向所述用户设备发送 Mobility From EUTRA Command 消息， 在所述 Mobility From EUTRA Command消息中携带目标 HRPD网络小 区的重定向信息和 lxRTT网络的信息， 指示所述用户设备将 PS业务重定向 到所述目标 HRPD网络小区， 并继续在当前的 lxRTT网络中进行语音业务。
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