WO2016150046A1 - 一种降低掉话率的方法、装置及系统 - Google Patents

一种降低掉话率的方法、装置及系统 Download PDF

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WO2016150046A1
WO2016150046A1 PCT/CN2015/084514 CN2015084514W WO2016150046A1 WO 2016150046 A1 WO2016150046 A1 WO 2016150046A1 CN 2015084514 W CN2015084514 W CN 2015084514W WO 2016150046 A1 WO2016150046 A1 WO 2016150046A1
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enb
indication message
erab
specific identifier
release request
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PCT/CN2015/084514
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English (en)
French (fr)
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黄雪英
彭云鹃
苏小明
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中兴通讯股份有限公司
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Publication of WO2016150046A1 publication Critical patent/WO2016150046A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

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  • This document relates to, but is not limited to, the field of mobile communication systems, and particularly relates to, but is not limited to, reducing the call drop rate of user equipment (UE, User Equipment) in the field of voice over LTE (VoLTE) in a Long Term Evolution (LTE) system.
  • UE User Equipment
  • VoIP voice over LTE
  • LTE Long Term Evolution
  • the evolved Node B eNB, evolved Node B
  • UE CONTEXT RELEASE REQUEST UE CONTEXT RELEASE REQUEST
  • MME Mobility Management Entity
  • the GBR Guard Bit Rate
  • the embodiments of the present invention provide a method, a device, and a system for reducing the call drop rate, so as to solve the technical problem of how to effectively reduce the call drop rate of the UE in the LTE system and improve the user experience.
  • the method for reducing the call drop rate of the UE includes: receiving a UE context release request or an evolved radio access bearer (ERAB: Evolved Radio Access Bearer) release indication message sent by the eNB; when the UE context release request message or the ERAB When the release indication message carries a specific identifier, the GBR bearer is reserved; wherein the specific identifier is used to indicate that the GBR bearer is reserved.
  • EMB evolved radio access bearer
  • the specific identifier may be Intra-RAT Redirection, or GBR preserve.
  • the receiving, by the receiving eNB, the UE context release request or the ERAB release indication message may include:
  • the eNB receives an ERAB release indication message sent based on the policy decision.
  • the foregoing reserved GBR bearer is used to recover voice services of the UE.
  • the apparatus for reducing the dropped rate of the user equipment UE includes: a receiving module and a detection processing module; wherein: the receiving module is configured to receive a UE context release request or an ERAB release indication message sent by the eNB; and the detection processing module And setting, to detect that the UE context release request message or the ERAB release indication message carries a specific identifier, retaining the GBR bearer; the specific identifier is used to indicate that the GBR bearer is reserved.
  • the specific identifier may be Intra-RAT Redirection, or GBR preserve.
  • the receiving, by the receiving eNB, the UE context release request or the ERAB release indication message may include:
  • the ERAB release indication message that the eNB needs to send based on the policy decision is received.
  • the foregoing reserved GBR bearer is used to recover voice services of the UE.
  • the system for reducing the call drop rate of the user equipment UE includes: an eNB, an MME;
  • the eNB is configured to send, to the MME, a UE identifier release request or an ERAB release indication message carrying a specific identifier, where the specific identifier is used to indicate a reserved guaranteed bit rate GBR bearer;
  • the MME is configured to receive the UE context release request or the ERAB release indication message, and when the specific identifier is detected, retain the GBR bearer; and the reserved GBR bearer is used to recover the voice service of the UE.
  • the specific identifier includes: inter-system redirection Intra-RAT Redirection, or Ensure that the bit rate remains GBR preserve.
  • An embodiment of the present invention provides a computer storage medium, where the computer storage medium stores computer executable instructions, and the computer executable instructions are used to execute the foregoing method.
  • the eNB carries the specific identifier indication when the UE context release or the ERAB bearer release is initiated according to the coverage or the policy-based scenario, such as the Intra-RAT Redirection, the serving cell abnormality, and the transmission abnormality.
  • the MME reserves the GBR bearer of the UE.
  • the MME restores the original GBR bearer, so that the voice service of the UE can be quickly restored, which can reduce the VoLTE call drop rate and significantly improve the user's Voice business experience.
  • FIG. 1 is a flow chart showing the basic steps of a method for reducing dropped call rate according to an embodiment of the present invention
  • FIG. 3 is a flow chart of Embodiment 2 of the present invention.
  • FIG. 4 is a schematic diagram of an apparatus for reducing a UE call rate according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of a system for reducing UE call rate according to an embodiment of the present invention.
  • the eNB needs to release the ERAB or the UE context in the scenario of the inter-system redirection and the exception handling policy.
  • the VoIP will be dropped. Affect the user's voice service experience.
  • the present invention carries the specific identifier in the UE context release request message or the ERAB release indication message to allow the MME to reserve the GBR bearer, so that when the UE has a voice data packet to send or a voice data packet to be sent to the UE on the network side, Quickly restore voice services and reduce the occurrence of dropped calls on user equipment.
  • the method for reducing the dropped call rate in the embodiment of the present invention includes:
  • Step 101 The MME receives a UE context release request or an ERAB release indication message sent by the eNB.
  • Step 102 When the UE context release request message or the ERAB release indication message carries a specific identifier, the MME reserves the GBR bearer.
  • the specific identifier is used to indicate that the MME reserves the GBR bearer.
  • the specific identifier may be a specific cause value, such as Intra-RAT Redirection and GBR preserve.
  • the eNB sends a UE context release request or an ERAB release indication message, which may be a UE context release request message based on the coverage Intra-RAT Redirection, or may send an ERAB release indication message according to the policy decision.
  • step 101 may be specifically: the MME receives a UE context release request sent by the eNB based on the covered Intra-RAT Redirection; or receives an ERAB release indication message that the eNB needs to send based on the policy decision.
  • FIG. 2 is a flowchart of Embodiment 1 of the present invention.
  • the embodiment is mainly used to describe a specific method for reducing the VoLTE call drop rate when the Intra-RAT Redirection is covered.
  • the method for reducing the call drop rate in the first embodiment of the present invention includes:
  • Step 201 The UE initiates a VoLTE service.
  • Step 202 The MME and the eNB accept the VoLTE service, and the voice call is established.
  • Step 203 The eNB determines that the signal quality of the current serving cell of the UE is poor, and the signal quality of other frequency points in the LTE system is good, and then initiates an Intra-RAT Redirection, indicating that the UE re-accesses to a frequency point with good signal quality;
  • Step 204 The eNB sends a UE context release request message to the MME, where the message carries a specific identifier.
  • Step 205 The MME receives the UE context release request message, and if the message carries the specific identifier, the MME retains the GBR bearer, and sends a UE context release command to the eNB.
  • Step 206 The eNB returns a UE context release complete message to the MME.
  • Step 207 The eNB sends a radio resource control (RRC: Radio Resource Control) connection release message to the UE, and instructs the UE to access the specified LTE frequency point.
  • RRC Radio Resource Control
  • Step 208 The UE re-accesses in the specified LTE frequency point.
  • Step 209 The MME restores the original GBR bearer, so that the voice service of the UE can be quickly recovered.
  • Embodiment 3 is a flow chart of Embodiment 2 of the present invention. This embodiment mainly describes a specific method for reducing the VoLTE call drop rate when the policy-based bearer is released. As shown in FIG. 3, the method for reducing the call drop rate in the second embodiment of the present invention includes:
  • Step 301 The UE initiates a VoLTE service.
  • Step 302 The MME and the eNB accept the VoLTE service, and the voice call is established.
  • Step 303 The eNB determines that the current serving cell is abnormal, and initiates a voice bearer release.
  • Step 304 The eNB sends an RRC connection reconfiguration message to the UE to release the voice bearer.
  • Step 305 The UE returns an RRC connection reconfiguration complete message to the eNB, and the voice bearer is successfully released.
  • Step 306 The eNB sends an ERAB release indication message to the MME, where the message carries a specific identifier.
  • Step 307 The MME receives the ERAB release indication message, and if it detects that the specific identifier is carried, the GBR bearer is reserved.
  • Step 308 When the UE has a voice data packet to be sent, or the voice data packet is sent to the UE on the network side, the MME restores the original GBR bearer, so that the voice service of the UE can be quickly recovered.
  • the embodiment of the invention further provides a computer storage medium, wherein the computer storage medium stores computer executable instructions, and the computer executable instructions are used to execute the above method.
  • the apparatus for reducing the dropped call rate provided by the example includes a receiving module and a detecting processing module.
  • the receiving module is configured to receive the UE context release request or the ERAB release indication sent by the eNB.
  • the detection processing module is configured to reserve the GBR bearer when the UE context release request message is detected or the ERAB release indication message carries the specific identifier.
  • the specific identifier includes: Intra-RAT Redirection, GBR preserve; and the reserved GBR bearer is used to recover the voice service of the UE;
  • the UE context release request or the ERAB release indication message sent by the receiving eNB includes:
  • the ERAB release indication message that the eNB needs to send based on the policy decision is received.
  • the device for reducing the dropped call rate in the embodiment of the present invention, and the receiving module and the detecting and processing module of the device may be implemented by using a processor of the MME, or may be implemented by a specific logic circuit, or may be implemented by a combination of software or software and hardware.
  • the processor may be a Central Processing Unit (CPU), a Micro Processor Unit (MPU), a Digital Signal Processor (DSP), or a Field Programmable Gate Array. (FPGA, Field-Programmable Gate Array), etc.
  • the embodiment of the present invention further provides a system for reducing a call drop rate of a user equipment UE, including: an evolved Node B eNB, and a mobility management entity MME;
  • the eNB is configured to send, to the MME, a radio access bearer ERAB release indication message carrying a specific identifier UE context release request or an evolvement; the specific identifier is used to indicate a reserved guaranteed bit rate GBR bearer;
  • the MME is configured to receive the UE context release request or the ERAB release indication message, and when the specific identifier is detected, retain the GBR bearer; and the reserved GBR bearer is used to recover the voice service of the UE.
  • all or part of the steps of the above embodiments may also be implemented by using an integrated circuit. These steps may be separately fabricated into individual integrated circuit modules, or multiple modules or steps may be fabricated into a single integrated circuit module. achieve.
  • the devices/function modules/functional units in the above embodiments may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices.
  • each device/function module/functional unit in the above embodiment When each device/function module/functional unit in the above embodiment is implemented in the form of a software function module and sold or used as a stand-alone product, it can be stored in a computer readable storage medium.
  • the above mentioned computer readable storage medium may be a read only memory, a magnetic disk or an optical disk or the like.
  • the MME can restore the original GBR bearer, so that the voice service of the UE can be quickly recovered, and the VoLTE call drop can be reduced. Rate, significantly improve the user's voice business experience.

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Abstract

一种长期演进系统中的语音业务领域降低用户设备掉话率的方法、装置及系统；其中，该方法包括：接收eNB发送的UE上下文释放请求或者ERAB释放指示消息；当所述UE上下文释放请求消息或者ERAB释放指示消息中携带有特定标识时保留GBR承载；所述特定标识用于指示保留GBR承载。上述技术方案可以有效降低VoLTE业务中UE的掉话率，提升用户体验。

Description

一种降低掉话率的方法、装置及系统 技术领域
本文涉及但不限于移动通信系统领域，尤其涉及但不限于在长期演进(LTE，Long Term Evolution)系统中的语音业务(VoLTE，Voice over LTE)领域降低用户设备(UE，User Equipment)掉话率的方法、装置和系统。
背景技术
为了保证语音业务的连续性，在LTE系统中，如果演进型节点B(eNB，evolved Node B)向移动性管理实体(MME，Mobility Management Entity)发起上下文释放请求(UE CONTEXT RELEASE REQUEST)时，MME一般不保留保证比特速率(GBR，Guranteed Bit Rate)承载，这就会造成用户设备(UE，User Equipment)在LTE或其他系统中重新接入后，不能快速恢复语音承载，容易导致UE掉话，影响用户的语音业务体验。
发明内容
以下是对本文详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。(The following is a brief summary of subject matter that is described in greater detail herein.This summary is not intended to be limiting as to the scope of the claims.)
本发明实施例提供一种降低掉话率的方法、装置及系统，以解决如何有效地降低LTE系统中UE的掉话率，提升用户体验的技术问题。
本发明实施例提供的降低UE掉话率的方法包括：接收eNB发送的UE上下文释放请求或者演进的无线接入承载(ERAB：Evolved Radio Access Bearer)释放指示消息；当UE上下文释放请求消息或者ERAB释放指示消息中携带有特定标识时，保留GBR承载；其中，特定标识用于指示保留GBR承载。
可选的，上述特定标识可以是Intra-RAT Redirection，或者GBR preserve。
可选的，上述接收eNB发送的UE上下文释放请求或者ERAB释放指示消息，可以包括：
接收eNB基于覆盖的Intra-RAT Redirection发送的UE上下文释放请求；或者
接收eNB基于策略判决发送的ERAB释放指示消息。
可选的，上述保留GBR承载，用于恢复所述UE的语音业务。
本发明实施例提供的降低用户设备UE掉话率的装置包括：接收模块和检测处理模块；其中：接收模块，设置为接收eNB发送的UE上下文释放请求或者ERAB释放指示消息；所述检测处理模块，设置为检测到UE上下文释放请求消息或者ERAB释放指示消息中携带有特定标识时，保留GBR承载；所述特定标识用于指示保留GBR承载。
可选的，上述特定标识可以是Intra-RAT Redirection，或者GBR preserve。
可选的，上述接收eNB发送的UE上下文释放请求或者ERAB释放指示消息，可以包括：
接收eNB基于覆盖的Intra-RAT Redirection发送的UE上下文释放请求；或者
接收eNB基于策略判决的需要发送的ERAB释放指示消息。
可选的，上述保留GBR承载，用于恢复所述UE的语音业务。
本发明实施例提供的降低用户设备UE掉话率的系统包括：eNB，MME；
eNB设置为向MME发送携带有特定标识UE上下文释放请求或者ERAB释放指示消息；所述特定标识用于指示保留保证比特速率GBR承载；
MME设置为接收所述UE上下文释放请求或者ERAB释放指示消息，并在检测到所述特定标识时，保留GBR承载；所述保留GBR承载，用于恢复所述UE的语音业务。
可选的，所述特定标识包括：系统间重定向Intra-RAT Redirection，或者 保证比特速率保持GBR preserve。
本发明实施例提供了一种计算机存储介质，所述计算机存储介质中存储有计算机可执行指令，所述计算机可执行指令用于执行上述的方法。
采用本发明实施例提供的方法、装置或系统，eNB在基于覆盖或基于策略场景下(如Intra-RAT Redirection、服务小区异常、传输异常)发起UE上下文释放或者ERAB承载释放时通过携带特定标识指示MME保留UE的GBR承载。当UE有语音数据包要发送，或者网络侧有语音数据包要给UE发送时，MME恢复原有的GBR承载，使得UE的语音业务可以快速恢复，可以降低VoLTE掉话率，显著提升用户的语音业务体验。
在阅读并理解了附图和详细描述后，可以明白其他方面。(Other aspects will be appreciated upon reading and understanding the attached figures and detailed description)
附图概述
图1是本发明实施例降低掉话率方法的基本步骤流程图；
图2是本发明实施例一的流程图
图3是本发明实施例二的流程图；
图4是本发明实施例降低掉UE话率的装置的示意图；
图5是本发明实施例降低掉UE话率的系统的示意图。
本发明的较佳实施方式
LTE系统中，eNB在系统间重定向(Intra-RAT Redirection)、异常处理策略等场景下，通常需要将ERAB或者UE上下文释放，此时，如果MME不保留GBR承载，就会导致语音掉话，影响用户的语音业务体验。本发明实 施例通过在UE上下文释放请求消息或者ERAB释放指示消息中携带特定标识以让MME保留GBR承载，这样在UE有语音数据包要发送或者在网络侧有语音数据包要发送给UE时，就可以快速恢复语音业务，降低了用户设备掉话的发生。
下面结合附图和具体实施例对本发明实施例的技术方案进行详细阐述。
图1是本发明实施例降低掉话率方法的基本步骤流程图，如图1所示，本发明实施例降低掉话率的方法，包括：
步骤101：MME接收eNB发送的UE上下文释放请求或者ERAB释放指示消息；
步骤102：当UE上下文释放请求消息或者ERAB释放指示消息中携带有特定标识时，MME保留GBR承载。
其中，特定标识用于指示MME保留GBR承载，在具体实现时特定标识可以是特定的原因值，如Intra-RAT Redirection、GBR preserve(GBR保持)。
eNB发送UE上下文释放请求或者ERAB释放指示消息，可以是基于覆盖的Intra-RAT Redirection发送UE上下文释放请求消息，也可以是基于策略判决的需要发送ERAB释放指示消息。相应的，步骤101具体可以是：MME接收eNB基于覆盖的Intra-RAT Redirection发送的UE上下文释放请求；或者接收eNB基于策略判决的需要发送的ERAB释放指示消息。
图2是本发明实施例一的流程图，该实施例主要用于说明基于覆盖的Intra-RAT Redirection时，降低VoLTE掉话率的具体方法。如图2所示，本发明实施例一降低掉话率的方法包括：
步骤201：UE发起VoLTE业务；
步骤202：MME和eNB接纳VoLTE业务，语音通话建立；
步骤203：eNB判断UE当前服务小区信号质量差，而LTE系统中其他频点信号质量很好，则发起Intra-RAT Redirection，指示UE到信号质量好的频点中重新接入；
步骤204：eNB向MME发送UE上下文释放请求消息，该消息中携带特定标识；
步骤205：MME接收UE上下文释放请求消息，检测到该消息中携带有特定标识，则保留GBR承载，并给eNB下发UE上下文释放指令；
步骤206：eNB给MME回复UE上下文释放完成消息；
步骤207：eNB给UE下发无线资源控制(RRC：Radio Resource Control)连接释放消息，并指示UE到指定LTE频点中接入；
步骤208：UE重新在指定的LTE频点中接入；
步骤209：MME恢复原有的GBR承载，使得UE的语音业务可以快速恢复。
图3是本发明实施例二的流程图。本实施例主要说明了基于策略的承载释放时，降低VoLTE掉话率的具体方法。如图3所示，本发明实施例二中降低掉话率的方法包括：
步骤301：UE发起VoLTE业务；
步骤302：MME和eNB接纳VoLTE业务，语音通话建立；
步骤303：eNB判断当前服务小区出现异常，则发起语音承载释放；
步骤304：eNB给UE下发RRC连接重配消息，释放语音承载；
步骤305：UE给eNB回复RRC连接重配完成消息，语音承载释放成功；
步骤306：eNB向MME发起ERAB释放指示消息，该消息中携带特定标识；
步骤307：MME接收ERAB释放指示消息，检测到携带有特定标识，则保留GBR承载；
步骤308：当UE有语音数据包要发送，或者网络侧有语音数据包要给UE发送时，MME恢复原有的GBR承载，使得UE的语音业务可以快速恢复。
本发明实施例还提供了一种计算机存储介质，所述计算机存储介质中存储有计算机可执行指令，所述计算机可执行指令用于执行上述的方法。
图4是本发明实施例降低掉话率的装置的示意图。如图4所示，本实施 例提供的降低掉话率的装置包括接收模块和检测处理模块。其中，接收模块设置为接收eNB发送的UE上下文释放请求或者ERAB释放指示；检测处理模块设置为检测到UE上下文释放请求消息或者ERAB释放指示消息中携带有特定标识时保留GBR承载。
其中，特定标识包括：Intra-RAT Redirection、GBR preserve；保留GBR承载，用于恢复所述UE的语音业务；
上述接收eNB发送的UE上下文释放请求或者ERAB释放指示消息，包括：
接收eNB基于覆盖的Intra-RAT Redirection发送的UE上下文释放请求；或者
接收eNB基于策略判决的需要发送的ERAB释放指示消息。
本发明实施例降低掉话率的装置，以及该装置的接收模块、检测处理模块可以通过MME的处理器来实现，也可以通过具体的逻辑电路实现，也可以通过软件或软硬件结合的方式实现。在实际应用中，所述处理器可以为中央处理器(CPU，Central Processing Unit)、微处理器(MPU，Micro Processor Unit)、数字信号处理器(DSP，Digital Signal Processor)或现场可编程门阵列(FPGA，Field－Programmable Gate Array)等。
如图5所示，本发明实施例还提供一种降低用户设备UE掉话率的系统，包括：演进型节点B eNB，移动性管理实体MME；
所述eNB设置为向MME发送携带有特定标识UE上下文释放请求或者演进的无线接入承载ERAB释放指示消息；所述特定标识用于指示保留保证比特速率GBR承载；
所述MME设置为接收所述UE上下文释放请求或者ERAB释放指示消息，并在检测到所述特定标识时，保留GBR承载；所述保留GBR承载，用于恢复所述UE的语音业务。
应当理解的是，对本领域普通技术人员来说，可以根据本发明的技术方 案的说明和具体实施方式做出各种可能的改变或替换，所有这些改变或替换都属于本发明的权利要求的保护范围。
本领域普通技术人员可以理解上述实施例的全部或部分步骤可以使用计算机程序流程来实现，所述计算机程序可以存储于一计算机可读存储介质中，所述计算机程序在相应的硬件平台上(如系统、设备、装置、器件等)执行，在执行时，包括方法实施例的步骤之一或其组合。
可选地，上述实施例的全部或部分步骤也可以使用集成电路来实现，这些步骤可以被分别制作成一个个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。
上述实施例中的各装置/功能模块/功能单元可以采用通用的计算装置来实现，它们可以集中在单个的计算装置上，也可以分布在多个计算装置所组成的网络上。
上述实施例中的各装置/功能模块/功能单元以软件功能模块的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。上述提到的计算机可读取存储介质可以是只读存储器，磁盘或光盘等。
工业实用性
上述技术方案中，当UE有语音数据包要发送，或者网络侧有语音数据包要给UE发送时，MME能够恢复原有的GBR承载，使得UE的语音业务可以快速恢复，可以降低VoLTE掉话率，显著提升用户的语音业务体验。

Claims (11)

  1. 一种降低用户设备UE掉话率的方法，包括：
    接收演进型节点eNB发送的UE上下文释放请求或者演进的无线接入承载ERAB释放指示消息；
    当所述UE上下文释放请求消息或者ERAB释放指示消息中携带有特定标识时，保留保证比特速率GBR承载；所述特定标识用于指示保留GBR承载。
  2. 根据权利要求1所述的方法，其中，
    所述特定标识包括：系统间重定向Intra-RAT Redirection，或者保证比特速率保持GBR preserve。
  3. 根据权利要求2所述的方法，其中，所述接收eNB发送的UE上下文释放请求或者ERAB释放指示消息，包括：
    接收eNB基于覆盖的Intra-RAT Redirection发送的UE上下文释放请求；或者，
    接收eNB基于策略判决发送的ERAB释放指示消息。
  4. 根据权利要求1至3任一项所述的方法，其中，
    所述保留GBR承载，用于恢复所述UE的语音业务。
  5. 一种降低用户设备UE掉话率的装置，包括：接收模块和检测处理模块；
    所述接收模块，设置为接收演进型节点eNB发送的UE上下文释放请求或者演进的无线接入承载ERAB释放指示消息；
    所述检测处理模块，设置为检测到UE上下文释放请求消息或者ERAB释放指示消息中携带有特定标识时，保留保证比特速率GBR承载；所述特定标识用于指示保留GBR承载。
  6. 根据权利要求5所述的装置，其中，
    所述特定标识包括：系统间重定向Intra-RAT Redirection，或者保证比特速率保持GBR preserve。
  7. 根据权利要求6所述的装置，其中，所述接收eNB发送的UE上下文释放请求或者ERAB释放指示消息，包括：
    接收eNB基于覆盖的Intra-RAT Redirection发送的UE上下文释放请求；或者
    接收eNB基于策略判决的需要发送的ERAB释放指示消息。
  8. 根据权利要求5至7任一项所述的装置，其中，
    所述保留GBR承载，用于恢复所述UE的语音业务。
  9. 一种降低用户设备UE掉话率的系统，包括：演进型节点eNB，移动性管理实体MME；
    所述eNB，设置为向MME发送携带有特定标识UE上下文释放请求或者演进的无线接入承载ERAB释放指示消息；所述特定标识用于指示保留保证比特速率GBR承载；
    所述MME，设置为接收所述UE上下文释放请求或者ERAB释放指示消息，并在检测到所述特定标识时，保留GBR承载；所述保留GBR承载，用于恢复所述UE的语音业务。
  10. 根据权利要求9所述的方法，其中，所述特定标识包括：系统间重定向Intra-RAT Redirection，或者保证比特速率保持GBR preserve。
  11. 一种计算机存储介质，所述计算机存储介质中存储有计算机可执行指令，所述计算机可执行指令用于执行权利要求1～4任一项所述的方法。
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