WO2011106995A1 - S1接口切换过程中承载接纳处理方法及移动性管理实体 - Google Patents

S1接口切换过程中承载接纳处理方法及移动性管理实体 Download PDF

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Publication number
WO2011106995A1
WO2011106995A1 PCT/CN2011/000348 CN2011000348W WO2011106995A1 WO 2011106995 A1 WO2011106995 A1 WO 2011106995A1 CN 2011000348 W CN2011000348 W CN 2011000348W WO 2011106995 A1 WO2011106995 A1 WO 2011106995A1
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Prior art keywords
mme
target
handover
source
enb
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PCT/CN2011/000348
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English (en)
French (fr)
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张娟
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电信科学技术研究院
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Publication of WO2011106995A1 publication Critical patent/WO2011106995A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0011Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0016Hand-off preparation specially adapted for end-to-end data sessions

Definitions

  • the present invention relates to a wireless communication technology, and in particular, to a bearer acceptance processing method and a mobility management entity device in an S1 interface switching process. Background technique
  • the existing protocol stipulates that if the default bearer of a PDN (Packet Data Network) connection is not accepted by the target eNB (Evolved Base Station), and the UE (User Equipment, User Equipment) has multiple activated PDN connections.
  • the MME Mobility Management Entity
  • the MME Mobility Management Entity
  • the X2 interface switching preparation process does not require the participation of the core network, and the base station cannot know which one of the UE-activated bearers is the default bearer. Therefore, the path switching can be waited only after the UE switches to the target cell.
  • the MME determines whether all default bearers are accepted by the target eNB, that is, whether all default (default) bearers are successfully established in the target cell, and then it is possible to decide whether to perform the subsequent detach process.
  • the technical problem to be solved by the present invention is to provide a bearer receiving processing method and a mobility management entity device in an S1 interface switching process.
  • a method for processing acceptance in an S1 interface switching process which includes the following steps:
  • the MME determines that the S1 interface switching preparation process is in progress
  • the MME determines the admission status of the UE by default in the target cell.
  • the MME determines the UE's default bearer in the target cell, including:
  • the source MME receives the forward rotation switching response message returned from the target MME;
  • the source MME determines that the UE defaults to the admission condition of the target cell.
  • the method further comprises:
  • the source MME When all of the default bearers are not successfully accepted by the target eNB, the source MME returns a handover failure message to the source eNB.
  • the method further comprises:
  • the source MME informs the target MME and the target eNB to clear all resources reserved for the UE.
  • the MME determines the admission of the UE by default to the target cell, including:
  • the target MME receives the handover request acknowledgement message returned from the target eNB;
  • the target MME determines the UE's default occupancy in the target cell.
  • the method further comprises:
  • the target MME When all the default bearers are not successfully accepted by the target eNB, the target MME returns a forward switching response message indicating the rejection to the source MMfi, and the message is used to trigger the source MME to return a handover failure message to the source eNB.
  • the method further comprises: The target MME informs the target eNB to clear all resources reserved for the UE.
  • the embodiment of the present invention provides a mobility management entity device, including:
  • a process determining module configured to determine that the S1 interface switching preparation process is in progress
  • the admission determining module is configured to determine, after the handover preparation process is completed, the UE's default bearer in the target cell.
  • the admission determining module is further configured to: when the MME is the source MME in the S1 interface handover process, after receiving the forward rotation switching response message returned from the target MME, when the forward rotation switching response message indicates that the handover preparation is successfully executed Determine the UE's default acceptance of the target cell.
  • the method further comprises:
  • the first returning module is configured to return a handover failure message to the source eNB when all the default bearers are not successfully accepted by the target eNB.
  • the method further comprises:
  • the first notification module is configured to notify the target MME and the target eNB to clear all resources reserved for the UE.
  • the admission determining module is further configured to determine, after receiving the handover request acknowledgement message returned from the target eNB, that the MME is the target MME in the S1 interface handover process, determining that the UE defaults to the admission status of the target cell.
  • the method further comprises:
  • a second returning module configured to: when all the default bearers are not successfully accepted by the target eNB, return a forward switching response message indicating that the source MME returns to the source MME, where the message is used to trigger the source MME to return the handover to the source eNB. Failure message.
  • the method further comprises:
  • a second notification module configured to notify the target eNB to clear all resources reserved for the UE.
  • the method further comprises:
  • the MME After the MME determines that the S1 interface switching preparation process is being performed, the MME starts to determine the UE when receiving the handover preparation response of the target side.
  • the default bearer is the admission of the target cell. Since the MME can use the response message to determine which of the UE's bearers are default bearers and which are dedicated bearers during the handover preparation process, the MME can determine whether all the default bearers are accepted during the handover preparation process. Some subsequent processing can be done.
  • the source base station can perform some processing such as selecting other target cells for the UE. Therefore, the problem that the network de-attach affects the continuity of the service due to the failure of the default bearer reception after the UE switches to the target cell is avoided.
  • FIG. 1 is a schematic diagram of a process of switching an X2 interface according to an embodiment of the present invention
  • FIG. 2 is a schematic flowchart of a successful S1 handover preparation process in an embodiment of the present invention
  • FIG. 3 is a schematic flowchart of a process of failing an S1 handover preparation process according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of an implementation process of a bearer acceptance processing method in an S1 interface switching process according to an embodiment of the present invention
  • FIG. 5 is a schematic structural diagram of a mobility management entity device according to an embodiment of the present invention. detailed description
  • Figure 1 is a schematic diagram of the X2 interface switching process.
  • the handover request message sent to the target eNB includes the bearer information of the UE.
  • the target eNB reserves resources for the UE, and returns the result of the bearer admission to the source eNB in the handover request response.
  • the target eNB sends a path request message to the MME after the UE switches to the target cell.
  • the MME can determine, according to the IE (Information Element) in the path request message, the bearer successfully received by the UE at the target eNB and the bearer that is not successfully accepted.
  • Figure 2 is a schematic diagram of the process of successfully completing the SI handover preparation process. As shown in the figure, when the S1 interface cutting preparation process is successful.
  • the source eNB selects the target cell and sends a handover request message to the source MME (source MME). If the MME receives the change, the source MME sends a forward forwarding request message to the target MME (target MME), and transmits the context information of the UE to the target MME, where the bearer of the UE is on the source eNB side. Contextual information.
  • FIG. 3 is a schematic diagram of the process of the S1 handover preparation process failure, as shown in the figure, in the process of handover preparation failure. After receiving the handover request sent by the target MME, the target eNB will accept the UE's bearer and reserve resources for the successfully accepted bearer.
  • the target eNB will return a handover failure message to the target MME, and the target MME displays the rejection in the forward rotation response sent to the source MME, and the source MME receives the handover to the source eNB after receiving the handover. Failure message. Therefore, according to the current protocol, as long as the target eNB accepts at least one bearer, the target eNB does not return a handover failure message and returns a handover request response message, and carries all the successfully accepted and unsuccessfully accepted bearer lists therein. Since e NB cannot distinguish between the default bearing and the dedicated bearing, there may be a scenario where a dedicated contract is successfully accepted and the default bearing is rejected.
  • the X2 interface switching preparation process does not require the participation of the core network, and the base station does not know which one of the UE-activated bearers is the default bearer. Therefore, after the UE switches to the target cell, the MME determines whether the path is switched during the path switching process. All default bearers are not successfully established in the target cell to determine whether to perform the subsequent detach process.
  • the core network participates in the handover preparation process, and the handover preparation response message returned by the target eNB to the target MME includes the bearer successfully received by the target base station and the bearer failed to be accepted.
  • the information is also included in the forward switching response returned by the target MME to the source MME.
  • Both the source MME and the target MME know which of the UE's bearers are the default bearers and which are the dedicated bearers. Therefore, during the handover preparation process, the MME can determine whether all the default bearers are accepted and perform corresponding processing, so as to prevent the UE from failing to establish the default bearer after switching to the target cell.
  • the UE enters the de-attach state, which affects the continuity of the service.
  • the MME does not know the handover procedure between the base stations, and the base station cannot distinguish which bearer is the default bearer, so if a certain PDN connection
  • the MME does not know the handover procedure between the base stations, and the base station cannot distinguish which bearer is the default bearer, so if a certain PDN connection
  • the MME will delete all the dedicated bearers of the PDN connection. If all the default bearers are not successfully established on the target side, the MME attaches the UE.
  • the source MME and the target MME can know the bearer admission status of the UE at the target base station. If the target base station does not successfully accept any of the default bearers, the MME may notify the source eNB of the ready state of the handover, and prevent the source eNB from being detached due to the failure of all the default bearers to be established after the UE is switched to the target side.
  • a bearer acceptance processing method and a mobility management entity device in an S1 interface switching process are proposed to solve this problem. Specific embodiments of the present invention will be described below with reference to the accompanying drawings.
  • FIG. 4 is a schematic diagram of a process for implementing the acceptance processing method in the S1 interface switching process, and the following steps may be included as shown in the figure:
  • Step 401 The MME determines that the S1 interface switching preparation process is being performed.
  • Step 402 After the handover preparation process is completed, the MME determines that the UE defaults to the admission of the target cell.
  • the MME determines that the UE defaults to the acceptance of the target cell. Specifically, this determination may be performed by the source MME or by the target MME. The following description will be respectively made.
  • the MME determines that the UE defaults the acceptance of the target cell in the target cell, and may include:
  • the source MME receives the forward rotation switching response message returned from the target MME;
  • the source MME determines the UE's default bearer in the target cell.
  • the forward switching response message includes the bearer successfully received by the target eNB and the bearer that is not successfully accepted.
  • the source MME knows which one of the bearers established by the UE is the default bearer, and which one is the dedicated bearer. Therefore, for the bearer list successfully received in the forward switching response message, it can be known that the default bearer is in the receiving state of the S-target eNB.
  • it may further include:
  • the source MME When all the default bearers are not successfully accepted by the target eNB, the source MME returns a handover failure message to the source eNB.
  • it may further include:
  • the source MME informs the target MME and the target eNB to clear all resources reserved for the UE.
  • the source MME when the source MME receives the forward switching response message returned from the target MME, and the message indicates that the handover preparation is successfully executed, the source MME further determines the specific information of the accepted bearer. If all of the default bearers are not successfully accepted by the target eNB, the source MME returns a handover failure message to the source eNB. In addition, the source MME will also notify the target MME and the target eNB to clear all resources reserved for the UE.
  • the MME determines, by the MME, the admission of the UE to the target cell by default, which may include:
  • the target MME receives the handover request acknowledgement message returned from the target eNB;
  • the target MME determines the admission status of the UE by default in the target cell.
  • the handover request acknowledgement message returned by the target eNB may include a bearer successfully received by the target eNB and a bearer that is not successfully accepted.
  • the forward relocation request message sent by the source MME to the target MME may include the bearer context information of the UE on the source side. Therefore, the target MME also knows which one of the bearers established by the UE is the default bearer, and which one It is a special contractor.
  • it may further include:
  • the target MME When all the default bearers are not successfully accepted by the target eNB, the target MME returns a forward switching response message indicating the rejection to the source MM, and the message is used to trigger the source MME to return a handover failure message to the source eNB.
  • it may further include:
  • the target MME informs the target eNB to clear all resources reserved for the UE.
  • the target MME further determines the bearer information included in the message, if all the default bearers are not If the target eNB successfully accepts, the target MME returns a forwarded switching response message to the source MME indicating the rejection, and notifies the target eNB to clear all resources reserved for the UE. After receiving the forward switching response message indicated by the target MME, the source MME returns a handover failure message to the source eNB.
  • Deleting all the dedicated bearers of the PDN connection according to the UE's default bearer in the target cell, or detaching the UE is because the default bearer is found to be unsuccessful in the target cell during the handover preparation phase.
  • the problem is to suspend the handover, so the source base station can perform some processing such as selecting other target cells for the UE, thereby avoiding the network de-attachment affecting the service due to the failure of the default bearer reception after the UE switches to the target cell.
  • the problem of continuity is to suspend the handover, so the source base station can perform some processing such as selecting other target cells for the UE, thereby avoiding the network de-attachment affecting the service due to the failure of the default bearer reception after the UE switches to the target cell.
  • the mobility management entity device is further provided in the embodiment of the present invention.
  • the principle of solving the problem is similar to the processing method of the bearer receiving in the S1 interface switching process, so the implementation of the device can be seen. The implementation of the method, the repetition will not be repeated.
  • the MME may include: a process determining module 501, configured to determine that the S1 interface switching preparation process is in progress;
  • the admission determination module 502 is configured to determine that the UE defaults to the admission status of the target cell.
  • the admission determining module may be further configured to: when receiving the forward switching response message returned from the target MME, when the MME is the source MME in the S1 interface switching process, when the forward rotation switching response message indicates that the handover preparation is successfully executed Determine the UE's default acceptance of the target cell.
  • the MME may further include:
  • the first returning module 503 is configured to return a handover failure message to the source eNB when all the default bearers are not successfully accepted by the target eNB.
  • the MME may further include:
  • the first notification module 504 is configured to notify the target MME and the target eNB to clear all resources reserved for the UE.
  • the admission determining module may be further configured to determine, after receiving the handover request acknowledgement message returned from the target eNB, that the MME is the target MME in the S1 interface handover process, determining, by the UE, the UE's default state of acceptance in the target cell.
  • J, MME can further include:
  • the second returning module 505 is configured to: when all the default bearers are not successfully accepted by the target eNB, return a forward switching response message indicating the rejection to the source MME, where the message is used to trigger the source MME to return to the source eNB. Switch failure message.
  • the MME may further include:
  • the second notification module 506 is configured to notify the target eNB to clear all resources reserved for the UE.
  • the MME may further include:
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the present invention is directed to a method, apparatus (system), and computer program according to an embodiment of the present invention.
  • the flow chart and/or block diagram of the product is described. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG.
  • These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device, which enables a series of operational steps to be performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in a block or blocks of a flow or a flow and/or a block diagram of a flowchart.

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Description

S 1接口切换过程中承栽接纳处理方法及移动性管理实体 本申请要求在 2010年 3月 3日提交中国专利局、申请号为 201010117734.x、发明名称为" S1 接口切换过程中承栽接纳处理方法及移动性管理实体设备"的中国专利申谛的优先权, 其全部 内容通过引用结合在本申请中。 技术领域
本发明涉及无线通信技术, 特别涉及一种 S 1接口切换过程中承栽接纳处 理方法及移动性管理实体设备。 背景技术
现有协议中规定, 如果某一 PDN ( Packet Data Network, 分组数据网)连 接的缺省承载没有被目标 eNB (演进基站)接纳, 并且 UE ( User Equipment, 用户设备 )有多个激活的 PDN连接时, MME ( Mobility Management Entity, 移动性管理实体)认为这一 PDN连接的所有承栽都失败并发起 PDN连接去 激活过程,去激活整个 PDN连接。如果所有缺省承栽都没有被目标 eNB接纳, MME将去附着 UE。
现有技术中, X2接口切换准备过程不需要核心网的参与, 同时基站也不 能够获知 UE激活的承栽哪一个是缺省承栽, 因此只能等到 UE切换到目标小 区后, 在路径倒换过程中由 MME判断所有缺省承栽是否被目标 eNB接纳, 即所有缺省(default )承载是否在目标小区成功建立, 然后才可能决定是否执 行后续的去附着过程。
现有技术的不足在于: 由于只有在切换到目标小区后才可以判断出是否 所有缺省承载被接纳的情况, 也才能够作出相应的去附着处理, 这也导致了 UE在切换到目标小区后会出现由于缺省承载建立失败而导致 UE进入到去附 着状态, 这也必然影响了业务的连续性。 发明内容
本发明所解决的技术问题在于提供了一种 S 1接口切换过程中承栽接纳处 理方法及移动性管理实体设备。
本发明实施例中提供了一种 S1接口切换过程中承栽接纳处理方法, 包括 如下步骤:
MME确定正在处于 S1接口切换准备过程;
在切换准备过程完成后, MME确定 UE缺省承载在目标小区的接纳情况。 较佳地,在 MME为 S1接口切换过程中的源 MME时, MME确定 UE缺 省承载在目标小区的接纳情况, 包括:
源 MME接收从目标 MME返回的前转倒换响应消息;
在前转倒换响应消息指示为切换准备成功执行时,源 MME确定 UE缺省 承载在目标小区的接纳情况。
较佳地, 进一步包括:
在所有的缺省承栽都没有被目标 eNB成功接纳时, 源 MME向源 eNB返 回切换失败消息。
较佳地, 进一步包括:
源 MME通知目标 MME和目标 eNB清除所有为 UE预留的资源。 、 较佳地, 在 MME为 S1接口切换过程中的目标 MME时, MME确定 UE 缺省承载在目标小区的接纳情况, 包括:
目标 MME接收到从目标 eNB返回的切换请求确认消息;
目标 MME确定 UE缺省承栽在目标小区的接纳情况。
较佳地, 进一步包括:
在所有的缺省承栽都没有被目标 eNB成功接纳时,目标 MME向源 MMfi 返回指示为拒绝的前转倒换响应消息, 所述消息用以触发源 MME向源 eNB 返回切换失败消息。
较佳地, 进一步包括: 目标 MME通知目标 eNB清除所有为 UE预留的资源。
本发明实施例中提供了一种移动性管理实体设备, 包括:
过程确定模块, 用于确定正在处于 S1接口切换准备过程;
接纳确定模块, 用于在切换准备过程完成后,确定 UE缺省承载在目标小 区的接纳情况。
较佳地, 接纳确定模块进一步用于在 MME 为 S1 接口切换过程中的源 MME时, 在接收从目标 MME返回的前转倒换响应消息后, 在前转倒换响应 消息指示为切换准备成功执行时, 确定 UE缺省承栽在目标小区的接纳情况。
较佳地, 进一步包括:
第一返回模块, 用于在所有的缺省承栽都没有被目标 eNB成功接纳时, 向源 eNB返回切换失败消息。
较佳地, 进一步包括:
第一通知模块, 用于通知目标 MME和目标 eNB清除所有为 UE预留的 资源。
较佳地, 接纳确定模块进一步用于在 MME为 S1接口切换过程中的目标 MME时,在接收到从目标 eNB返回的切换请求确认消息后,确定 UE缺省承 载在目标小区的接納情况。
较佳地, 进一步包括:
第二返回模块, 用于在所有的缺省承栽都没有被目标 eNB成功接纳时, 向源 MME返回指示为拒绝的前转倒换响应消息, 所述消息用以触发源 MME 向源 eNB返回切换失败消息。
较佳地, 进一步包括:
第二通知模块, 用于通知目标 eNB清除所有为 UE预留的资源。
较佳地, 进一步包括:
本发明有益效果如下:
在本发明实施例提供的技术方案中, 在 MME确定正在处于 S1接口切换 准备过程后, MME在接收到目标侧的切换准备响应时, MME便开始确定 UE 缺省承载在目标小区的接纳情况。由于利用了 MME在切换准备过程中能够通 过响应消息确定 UE的承栽中哪些是缺省承栽哪些是专用承载,因此在切换准 备过程中 MME 就可以判断出是否所有缺省承栽被接纳从而可以作出后续一 些相应的处理。
进一步的, 由于在切换准备阶段就能发现所有缺省承栽在目标小区都没 有接纳成功这一问题, 并可以中止这一切换, 所以源基站可以进行一些如为 UE选择其他的目标小区等处理, 从而避免了当 UE切换到目标小区后由于缺 省承栽的接纳失败而被网络去附着影响业务的连续性的问题。 附图说明
图 1为本发明实施例中 X2接口切换流程示意图;
图 2为本发明实施例中 S1切换准备过程成功的流程示意图;
图 3为本发明实施例中 S1切换准备过程失败的流程示意图;
图 4为本发明实施例中 S1接口切换过程中承栽接纳处理方法实施流程示 意图;
图 5为本发明实施例中移动性管理实体设备结构示意图。 具体实施方式
发明人在发明过程中注意到:
图 1为 X2接口切换流程示意图, 如图所示, 在 X2接口切换流程中, 切 换准备过程只有 source eNB (源演进基站)与 target eNB (目标演进基站)的 参与, 与 MME无关, source eNB在发送给 target eNB的切换请求消息中包含 UE的承载信息, target eNB收到这条消息后为 UE预留资源, 并将承载接纳 的结果在切换请求响应中回复给 source eNB。 当 UE切换到目标小区后目标 eNB向 MME发送路径请求消息。 MME根据路径请求消息中的 IE( Information Element, 信息单元)可以判断出 UE在目标 eNB成功接纳的承栽和没有成功 接纳的承载。 图 2 为 SI切换准备过程成功的流程示意图, 如图所示, 在 S1接口切操 准备过程成功时。 source eNB选择了目标小区后向 source MME (源 MME ) 发送切换请求消息。 如果 MME发生了改变, source MME收到这条消息后会 向 target MME (目标 MME )发送前转倒换请求消息, 并将 UE的上下文信息 传递给目标 MME,其中就包含 UE在源 eNB侧的承载上下文信息。 目标 eNB 收到这条消息后为 UE预留资源,并将承栽接纳状态包含在切换请求确认消息 中报告给目标 MME。 目标 MME将确认消息通过源 MME传递给源 eNB。 ; 图 3为 S1切换准备过程失败的流程示意图, 如图所示, 在切换准备失败 的流程中。 当目标 eNB收到从目标 MME发送的切换请求后, 将对 UE的承 栽进行接纳判决, 并为成功接納的承栽预留资源。 根据协议描述, 如果所有 承载都接纳失败, 目标 eNB将返回切换失败消息到目标 MME, 目标 MME 在发送给源 MME的前转倒换响应中显示为拒绝, 源 MME收到后向源. eNB 发送切换失败消息。 因此, 根据当前协议, 只要目标 eNB接纳了至少一条承 栽, 目标 eNB就不会返回切换失败消息而会返回切换请求响应消息, 并在其 中携带所有成功接纳和非成功接纳的承栽列表。 由于 eNB无法区分缺省承栽 和专用承栽, 因此可能会出现某一专用承栽被成功接纳, 而缺省承栽被拒绝 接纳的场景。
X2接口切换准备过程不需要核心网的参与, 而基站又不知道 UE激活的 承栽中哪一个是缺省承载, 因此只能等到 UE切换到目标小区后, 由 MME在 路径倒换过程中判断是否所有缺省承栽没有在目标小区成功建立, 从而才能 确定是否执行后续的去附着过程。
而在 S1接口切换中,核心网参与切换准备过程,并且在目标 eNB返回给 目标 MME 的切换准备响应消息中会包含在目标基站接纳成功的承载和接纳 失败的承载。 目标 MME返回给源 MME的前转倒换响应中也包含这些信息。 无论源 MME还是目标 MME都知道 UE的承栽中哪些是缺省承载哪些是专用 承载。因此在切换准备过程中 MME就可以判断出是否所有缺省承载被接纳从 而作出相应的处理,避免 UE在切换到目标小区后由于缺省承栽建立失败而导 致 UE进入到去附着状态, 影响了业务的连续性。
也即, 对于 X2接口切换而言, 由于切换准备过程只在 eNB之间执行, MME不知道基站间的切换过程, 而基站无法区分哪一个承栽是缺省承栽, 因 此如果某一 PDN连接的 default承栽在目标侧没有接纳成功时,需要等到 M E 收到目标 eNB发送的路径切换请求后才能知道, MME将删除这一 PDN连接 的所有专用承栽。 若所有的 default承栽在目标侧都没有成功建立, MME特 去附着这一 UE。 而对于 SI接口切换而言, 由于切换准备过程的消息需要在 MME之间传递, 因此源 MME和目标 MME能够知道 UE在目标基站的承载 接纳状况。 若目标基站没有成功接纳任何一个 default承栽时, MME可以及 时通知源 eNB切换准备的状态, 避免源 eNB将 UE切换到目标侧后由于所有. default承栽建立失败而被去附着。本发明实施例中将提出一种 S1接口切换过 程中承栽接纳处理方法及移动性管理实体设备用以解决这一问题。 下面结合 附图对本发明的具体实施方式进行说明。
图 4为 S1接口切换过程中承栽接纳处理方法实施流程示意图,如图所示 可以包括如下步骤:
步骤 401、 MME确定正在处于 S1接口切换准备过程;
步骤 402、 在切换准备过程完成后, MME确定 UE缺省承栽在目标小区 的接纳情况。
实施中, 在执行 S1接口切换准备过程中, MME收到了目标侧的切换准 备响应后就判断 UE缺省承栽在目标小区的接纳情况。具体的,这一判断可以 由源 MME执行, 也可以由目标 MME执行。 下面分别进行说明。
一、 由源 MME执行的情况。
在 MME为 S1接口切换过程中的源 MME时, MME确定 UE缺省承栽在 目标小区的接纳情况, 可以包括:
源 MME接收从目标 MME返回的前转倒换响应消息;
在前转倒换响应消息指示为切换准备成功执行时,源 MME确定 UE缺省 承载在目标小区的接纳情况。 这里, 前转倒换响应消息中会包含目标 eNB成功接纳的承栽和没有成功 接纳的承栽, 源 MME会知道 UE建立的承栽中哪一条是 default承栽, 哪一 条是专用承栽。 因此, 对于前转倒换响应消息中成功接纳的承栽列表可以知 道 default承载在 S标 eNB的接纳状态。
实施中, 还可以进一步包括:
在所有的缺省承载都没有被目标 eNB成功接纳时, 源 MME向源 eNB返 回切换失败消息。
实施中, 还可以进一步包括:
源 MME通知目标 MME和目标 eNB清除所有为 UE预留的资源。
具体的, 在由源 MME执行过程中, 当源 MME收到了从目标 MME返回 的前转倒换响应消息, 并且这一消息指示为切换准备成功执行时, 源 MME 要进一步判断接纳承载的具体信息, 如果所有的缺省承载都没有被目标 eNB 成功接纳, 则源 MME向源 eNB返回切换失败消息。 另外, 源 MME还将通 知目标 MME和目标 eNB清除所有为 UE预留的资源。
二、 由目标 MME执行的情况。
在 MME为 S1接口切换过程中的目标 MME时, MME确定 UE缺省承栽 在目标小区的接纳情况, 可以包括:
目标 MME接收到从目标 eNB返回的切换请求确认消息;
目标 MME确定 UE缺省承载在目标小区的接纳情况。
这里, 目标 eNB返回的切换请求确认消息中会包含目标 eNB成功接纳的 承载和没有成功接纳的承载。而在之前源 MME发送给目标 MME的前转请求 ( forward relocation request ) 消息中会包含 UE在源侧的承载上下文信息, 因 此目标 MME也知道 UE建立的承栽中哪条是 default承载,哪条是专用承栽。
实施中, 还可以进一步包括:
在所有的缺省承载都没有被目标 eNB成功接纳时,目标 MME向源 MM£ 返回指示为拒绝的前转倒换响应消息, 所述消息用以触发源 MME向源 eNB 返回切换失败消息。 实施中, 还可以进一步包括:
目标 MME通知目标 eNB清除所有为 UE预留的资源。
具体的, 在由目标 MME执行过程中, 当目标 MME收到了从目标 eNB 返回的切换请求确认消息后,目标 MME进一步判断消息中包含的承载接纳的 信息, 如果所有的缺省承栽都没有被目标 eNB成功接纳, 则目标 MME向源 MME返回前转倒换响应消息中指示为拒绝, 并通知目标 eNB清除所有为 UE 预留的资源。源 MME收到目标 MME返回指示为拒绝的前转倒换响应消息后 向源 eNB返回切换失败消息。
根据 UE缺省承栽在目标小区的接纳情况删除 PDN连接的所有专用承栽, 或去附着 UE的目的在于,由于在切换准备阶段就发现所有缺省承栽在目标小 区都没有接纳成功这一问题, 并中止这一切换, 所以源基站可以进行一些如 为 UE选择其他的目标小区等处理,从而避免了当 UE切换到目标小区后由于 缺省承栽的接纳失败而被网络去附着影响业务的连续性的问题。
基于同一发明构思, 本发明实施例中还提供了一种移动性管理实体设备, 由于该设备解决问题的原理与一种 S1 接口切换过程中承栽接纳处理方法相 似, 因此该设备的实施可以参见方法的实施, 重复之处不再赘述。
图 5为移动性管理实体设备结构示意图, 如图所示, MME中可以包括: 过程确定模块 501, 用于确定正在处于 S1接口切换准备过程;
接纳确定模块 502, 用于确定 UE缺省承栽在目标小区的接纳情况。
一、 在 MME为源 MME时的实施。
实施中, 接纳确定模块可以进一步用于在 MME为 S1接口切换过程中的 源 MME时,在接收从目标 MME返回的前转倒换响应消息后,在前转倒换响 应消息指示为切换准备成功执行时, 确定 UE缺省承栽在目标小区的接纳情 况。
则, MME中还可以进一步包括:
第一返回模块 503, 用于在所有的缺省承栽都没有被目标 eNB成功接纳 时, 向源 eNB返回切换失败消息。 MME中还可以进一步包括:
第一通知模块 504,用于通知目标 MME和目标 eNB清除所有为 UE预留 的资源。
二、 在 MME为目标 MME时的实施。
实施中, 接納确定模块可以进一步用于在 MME为 S1接口切换过程中的 目标 MME时, 在接收到从目标 eNB返回的切换请求确认消息后, 确定 UE 缺省承栽在目标小区的接纳情况。
贝 |J, MME中还可以进一步包括:
第二返回模块 505, 用于在所有的缺省承栽都没有被目标 eNB成功接纳 时, 向源 MME返回指示为拒绝的前转倒换响应消息, 所述消息用以触发源 MME向源 eNB返回切换失败消息。
MME中还可以进一步包括:
第二通知模块 506, 用于通知目标 eNB清除所有为 UE预留的资源。 实施中, MME中还可以进一步包括:
为了描述的方便, 以上所述装置的各部分以功能分为各种模块或单元分 别描述。 当然, 在实施本发明时可以把各模块或单元的功能在同一个或多个 软件或硬件中实现。
可见, 在本发明提供的技术方案中, 在切换准备阶段就可以发现所有缺 省承载在目标小区都没有接纳成功这一问题, 并中止这一切换, 源基站可以 为 UE选择其他的目标小区,避免了当 UE切换到目标小区后由于缺省承栽的 接纳失败而被网络去附着。
本领域内的技术人员应明白, 本发明的实施例可提供为方法、 系统、 或 计算机程序产品。 因此, 本发明可采用完全硬件实施例、 完全软件实施例、 或结合软件和硬件方面的实施例的形式。 而且, 本发明可采用在一个或多个 其中包含有计算机可用程序代码的计算机可用存储介质 (包括但不限于磁盘 存储器、 CD-ROM、 光学存储器等)上实施的计算机程序产品的形式。
本发明是参照根据本发明实施例的方法、 设备(系统)、 和计算机程序产 品的流程图和 /或方框图来描述的。 应理解可由计算机程序指令实现流程图 和 /或方框图中的每一流程和 /或方框、 以及流程图和 /或方框图中的流程 和 /或方框的结合。 可提供这些计算机程序指令到通用计算机、 专用计算机、 嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器, 使得通 过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流 程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的 装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设 备以特定方式工作的计算机可读存储器中, 使得存储在该计算机可读存储器 中的指令产生包括指令装置的制造品, 该指令装置实现在流程图一个流程或 多个流程和 /或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上, ' 使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的 处理, 从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图 一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的步 骤。
尽管已描述了本发明的优选实施例, 但本领域内的技术人员一旦得知了 基本创造性概念, 则可对这些实施例作出另外的变更和修改。 所以, 所附权 利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。 发明的精神和范围。 这样, 倘若本发明的这些修改和变型属于本发明权利要 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。

Claims

权 利 要 求
1、 一种 S1接口切换过程中承栽接纳处理方法, 其特征在于, 包括如下 步骤:
移动性管理实体 MME确定正在处于 S1接口切换准备过程;
在切换准备过程完成后, MME确定用户设备 UE缺省承栽在目标小区的 接纳情况。
2、 如权利要求 1所述的方法, 其特征在于, 在 MME为 S1接口切换过 程中的源 MME时, MME确定 UE缺省承栽在目标小区的接纳情况, 包括: 源 MME接收从目标 MME返回的前转倒换响应消息;
在前转倒换响应消息指示为切换准备成功执行时,源 MME确定 UE缺省 承载在目标小区的接纳情况。
3、 如权利要求 2所述的方法, 其特征在于, 进一步包括:
在所有的缺省承栽都没有被目标演进基站 eNB成功接纳时, 源 MME向 源演进基站 eNB返回切换失败消息。
4、 如权利要求 2所述的方法, 其特征在于, 进一步包括:
源 MME通知目标 MME和目标 eNB清除所有为 UE预留的资源。
5、 如权利要求 1所述的方法, 其特征在于, 在 MME为 S1接口切换过 程中的目标 MME时, MME确定 UE缺省承栽在目标小区的接纳情况, 包括: 目标 MME接收到从目标 eNB返回的切换请求确认消息;
目标 MME确定 UE缺省承栽在目标小区的接纳情况。
6、 如权利要求 5所述的方法, 其特征在于, 进一步包括:
在所有的缺省承栽都没有被目标 eNB成功接纳时,目标 MME向源 MME 返回指示为拒绝的前转倒换响应消息, 所述消息用以触发源 MME向源 eNB 返回切换失败消息。
7、 如权利要求 5所述的方法, 其特征在于, 进一步包括:
目标 MME通知目标 eNB清除所有为 UE预留的资源。
8、 一种移动性管理实体设备, 其特征在于, 包括:
过程确定模块, 用于确定正在处于 S1接口切换准备过程;
接納确定模块, 用于在切换准备过程完成后,确定 UE缺省承载在目标小 区的接纳情况。
9、 如权利要求 8所述的设备, 其特征在于, 接纳确定模块进一步用于在 MME为 S1接口切换过程中的源 MME时, 在接收从目标 MME返回的前转 倒换响应消息后, 在前转倒换响应消息指示为切换准备成功执行时, 确定 UE 缺省承栽在目标小区的接纳情况。
10、 如权利要求 9所述的设备, 其特征在于, 进一步包括:
第一返回模块, 用于在所有的缺省承栽都没有被目标 eNB成功接纳时, 向源 eNB返回切换失败消息。
11、 如权利要求 9所述的设备, 其特征在于, 进一步包括:
第一通知模块, 用于通知目标 MME和目标 eNB清除所有为 UE预留的 资源。
12、 如权利要求 8所述的设备, 其特征在于, 接纳确定模块进一步用于 在 MME为 S1接口切换过程中的目标 MME时,在接收到从目标 eNB返回的 切换请求确认消息后, 确定 UE缺省承栽在目标小区的接纳情况。
13、 如权利要求 12所述的设备, 其特征在于, 进一步包括:
第二返回模块, 用于在所有的缺省承栽都没有被目标 eNB成功接纳时 向源 MME返回指示为拒绝的前转倒换响应消息, 所述消息用以触发源 MME 向源 eNB返回切换失败消息。
14、 如权利要求 12所述的设备, 其特征在于, 进一步包括:
第二通知模块, 用于通知目标 eNB清除所有为 UE预留的资源。
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