WO2016061986A1 - 能力信息获取方法、装置及系统 - Google Patents

能力信息获取方法、装置及系统 Download PDF

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Publication number
WO2016061986A1
WO2016061986A1 PCT/CN2015/074330 CN2015074330W WO2016061986A1 WO 2016061986 A1 WO2016061986 A1 WO 2016061986A1 CN 2015074330 W CN2015074330 W CN 2015074330W WO 2016061986 A1 WO2016061986 A1 WO 2016061986A1
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handover
capability information
base station
target base
completed
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PCT/CN2015/074330
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English (en)
French (fr)
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靳虓
周臣云
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中兴通讯股份有限公司
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Publication of WO2016061986A1 publication Critical patent/WO2016061986A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
    • H04W8/24—Transfer of terminal data

Definitions

  • the present invention relates to the field of communications, and in particular to a method, device, and system for acquiring capability information.
  • Evolved UTRAN Universal Mobile Telecommunications System Terrestrial Radio Access Network
  • EPS Evolved Packet System
  • NodeB evolved NodeB
  • eNodeB eNodeB
  • 1 is a flow chart of handover signaling of a Mobility Management Entity (MME) in a Long Term Evolution (LTE) system according to the related art.
  • MME Mobility Management Entity
  • LTE Long Term Evolution
  • Inter-eNB handover based on X2 interface 1.
  • the MME has not changed during this handover.
  • the service gateway (Serving Gateway, S-GW for short) may be divided into an X2 handover (S-GW unchanged) procedure and an X2 handover S-GW redirect handover procedure.
  • the handover preparation phase determines whether the bearers need to be forwarded by the source.
  • the E-UTRAN can initiate an S1-based handover.
  • the MME can be redirected, and the S-GW can also be redirected.
  • the source MME selects the target MME, and the target MME decides whether the S-GW is redirected.
  • the source eNB determines which bearers need to be forwarded (DL FORWARDING).
  • the packet forwarding may be directly forwarded to the target MME through the source eNB in a direct manner, or may be forwarded indirectly through the source or target S-GW. If the source eNB determines that the X2 connection is available, the direct mode is adopted; if not, the indirect forwarding mode is adopted.
  • the protocol stipulates that the information about the capabilities of the user equipment (User Equipment, also referred to as the UE, also referred to as the terminal) cannot be transmitted between the nodes of the core network (Core Network). Therefore, after the handover of the UE occurs, the UE The MME corresponding to the handover target cell is capability information that does not save the UE. After the UE switches to the target cell, the IDLE state may be released because the User Inactive timer expires. Then, if the UE wants to initiate random access, in the process of accessing, the core network does not have the The capability information of the UE, so the air interface initiates a UE capability query process to acquire UE capability information. This process leads to an increase in UE access delay.
  • the UE User Equipment
  • the embodiments of the present invention provide a method, an apparatus, and a system for acquiring capability information, so as to at least solve the problem that the access delay after the inter-eNB handover based on the S1 interface in the related art is long.
  • a method for acquiring capability information including: determining, by the target base station that the handover occurs, whether the handover type of the handover is a cross-core CN handover; if yes, the target after the handover is completed
  • the base station acquires capability information of the handover terminal UE, and sends the capability information of the UE to the CN.
  • the acquiring, by the target base station, the capability information of the handover UE after the handover is completed includes: after the handover is completed, the target base station saves the capability information of the UE carried in the handover request.
  • the method further includes: in the case that the UE initiates random access in the cell to which the UE is handed over, the context is established in the context.
  • the capability information of the UE is carried in the request.
  • the method before the UE initiates random access in the cell to which the handover is performed, the method further includes: the UE changing from the connected state to the idle IDLE state in the handover to the cell.
  • a capability information acquisition method including: a core network CN receives capability information of a handover terminal UE sent from a target base station where handover occurs, wherein the target base station determines the current handover Whether the handover type is a cross-CN handover, if yes, acquiring the capability information of the UE after the handover is completed; the CN is established in the context when the UE initiates random access in the cell to which the handover is initiated. The capability information of the UE is carried in the request.
  • a capability information acquiring apparatus includes: a determining module, configured to determine whether the handover type of the current handover is a cross-core network CN handover; The module is configured to: when the determination result of the determining module is yes, after the handover is completed, the target base station acquires capability information of the handover terminal UE, and sends the capability information of the UE to the core network.
  • the first sending module includes: a saving unit, configured to save the capability information of the UE carried in the handover request after the handover is completed.
  • another capability information acquiring apparatus which is located at the core network CN, and includes: a receiving module, configured to receive capability information of the handover terminal UE sent from the target base station where the handover occurs, where The target base station determines whether the handover type of the current handover is a cross-CN handover, and if yes, acquires capability information of the UE after the handover is completed; and the second sending module is configured to switch to the UE at the current handover to In the case that the cell initiates random access, the capability information of the UE is carried in the context establishment request.
  • the second sending module is configured to: the UE changes from the connected state to the idle IDLE state in the handover to the cell; and initiates random access in the cell to which the UE is switched to.
  • the capability information of the UE is carried in the context establishment request.
  • a capability information acquiring system including the foregoing capability information acquiring apparatus located at a target base station where handover occurs, and the foregoing capability information acquiring apparatus located in the core network CN.
  • the target base station that performs the handover determines whether the handover type of the handover is a cross-CN handover; if yes, the target base station acquires the capability information of the handover terminal UE after the handover is completed, and the UE is obtained.
  • the method for transmitting the capability information to the CN solves the problem that the access delay after the inter-eNB handover based on the S1 interface is longer in the related art, and reduces the access delay after the inter-eNB handover between the CNs. , improved user experience.
  • FIG. 1 is a flow chart of cross-MME handover signaling in an LTE system according to the related art
  • FIG. 2 is a flowchart of a method for acquiring capability information according to an embodiment of the present invention
  • FIG. 3 is a structural block diagram of a capability information acquiring apparatus according to an embodiment of the present invention.
  • FIG. 4 is a flowchart of another method for acquiring capability information according to an embodiment of the present invention.
  • FIG. 5 is a structural block diagram of another capability information acquiring apparatus according to an embodiment of the present invention.
  • FIG. 6 is a structural block diagram of a capability information acquisition system according to an embodiment of the present invention.
  • FIG. 7 is a flow chart of cross-MME handover signaling in an improved LTE system according to a preferred embodiment 1 of the present invention.
  • FIG. 8 is a flow chart of a common GERAN to LTE cross-CN handover signaling according to a preferred embodiment 2 of the present invention
  • FIG. 9 is a flow chart of an improved GERAN to LTE cross-CN handover signaling according to a preferred embodiment 2 of the present invention.
  • FIG. 10 is a flow chart of a common UTRAN to LTE cross-CN handover signaling according to a preferred embodiment 3 of the present invention
  • 11 is a flow chart of improved UTRAN to LTE cross-CN handover signaling in accordance with a preferred embodiment 3 of the present invention.
  • FIG. 2 is a flowchart of a method for acquiring capability information according to an embodiment of the present invention. As shown in FIG. 2, the method includes the following steps:
  • Step S202 the target base station that performs the handover determines whether the handover type of the current handover is a cross-CN handover;
  • Step S204 if yes, after the handover is completed, the target base station acquires capability information of the handover terminal UE, and sends the capability information of the UE to the CN.
  • the target base station that performs the handover obtains the capability information of the handover UE after the handover is completed, and sends the capability information to the core network, so that the core network is generated.
  • the capability information of the UE can be obtained even if the UE is switched over the CN, and the capability query process initiated by the core network to the UE when the UE initiates the access again is saved, and the inter-eNB handover between the CNs based on the S1 interface in the related art is solved.
  • the problem of long access delay is longer, which reduces the access delay after inter-eNB handover between CNs and improves the user experience.
  • the target base station may further save the capability information of the UE carried in the handover request.
  • the target base station sends the capability information of the UE to the CN
  • the CN may be carried in the context establishment request.
  • the capability information of the UE may be carried in the context establishment request.
  • the UE may change from a connected state to an idle (IDLE) state before the UE initiates random access again in the cell to which the handover is to be performed.
  • IDL idle
  • a capability information acquiring device is provided, which is located at the target base station where the handover occurs, and the device is configured to implement the foregoing embodiment and the preferred embodiment, and has been described. No longer.
  • the term "module” may implement a combination of software and/or hardware of a predetermined function.
  • the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
  • FIG. 3 is a structural block diagram of a capability information acquiring apparatus according to an embodiment of the present invention. As shown in FIG. 3, the apparatus includes a determining module 32 and a first sending module 34. The following describes each module in detail:
  • the determining module 32 is configured to determine whether the switching type of the current switching is a cross-CN switching; the first sending module 34 is connected to the determining module 32, and is configured to switch when the determining result of the determining module 32 is YES. After the completion, the target base station acquires capability information of the handover terminal UE, and sends the capability information of the UE to the CN.
  • the first sending module 34 may include: a saving unit, configured to save the capability information of the UE carried in the handover request after the handover is completed.
  • FIG. 4 is a flowchart of another method for acquiring capability information according to an embodiment of the present invention. As shown in FIG. 4, the method includes the following steps:
  • Step S402 the CN receives the capability information of the handover UE sent from the target base station where the handover occurs, wherein the target base station determines whether the handover type of the current handover is a cross-CN handover, and if yes, acquires the handover after the handover is completed.
  • UE capability information
  • Step S404 The CN carries the capability information of the UE in a context setup request if the UE initiates random access in the cell to which the handover is to be performed.
  • the core network obtains the capability information of the UE that has undergone the cross-CN handover, and the capability information of the UE can be carried in the context setup request when the UE initiates the random access again, thereby saving the UE.
  • the capability query process initiated by the core network to the UE when the access is initiated again solves the problem that the access delay after the inter-eNB handover based on the S1 interface is longer in the related art, and the inter-eNB handover between the CNs is reduced. The subsequent access delay improves the user experience.
  • FIG. 5 is another capability information acquisition device according to an embodiment of the present invention.
  • the device includes a receiving module 52 and a second transmitting module 54, and each module is described in detail below:
  • the receiving module 52 is configured to receive capability information of the handover terminal (UE) sent from the target base station where the handover occurs, wherein the target base station determines whether the handover type of the handover is a cross-CN handover, and if yes, the handover After the completion, the capability information of the UE is obtained; the second sending module 54 is connected to the receiving module 52, and is configured to carry in the context establishment request if the UE initiates random access in the cell to which the handover is initiated. The capability information of the UE.
  • UE handover terminal
  • the second sending module 54 may be configured to: the UE changes from a connected state to an idle (IDLE) state in the switched cell, and initiates a random in the cell to which the UE is handed over at the current handover.
  • IDLE idle
  • the capability information of the UE is carried in the context establishment request.
  • FIG. 6 is a structural block diagram of a capability information acquisition system according to an embodiment of the present invention. As shown in FIG. 6, the system includes the location shown in FIG.
  • the capability information acquiring means 30 of the target base station to be switched further includes the capability information acquiring means 50 located at the CN as shown in FIG.
  • a method and apparatus for reducing UE access delay after cross-CN handover in an LTE (Long Term Evolution) mobile communication system are provided, which is configured to reduce handover scenarios across the CN.
  • the delay of random access is initiated again after cutting into the LTE cell.
  • the handover target base station that determines the handover determines the current handover type, and determines whether the current handover is a cross-CN handover. If the handover is a cross-CN handover, the UE capability information carried in the handover request is saved and sent to the core network after the handover is completed. After the core network receives the UE capability information, it is saved. The UE then changes from CONNECT to IDLE (if the UserInactive function is released) under the cell. When the cell initiates a random access (such as a service request), the core network carries the UE capability information in the context setup request, and the UE does not need to initiate the UE capability query process again, thereby reducing access. The signaling interaction of the Uu interface between the eNB and the UE in the process reduces the delay of the access.
  • the eNB does not need to send the UE capability information to the MME after the handover is completed.
  • the method and apparatus for reducing UE access delay after cross-CN handover provided by the preferred embodiment are described in detail below.
  • the processing may be divided into the following two steps:
  • Step 1 The target eNB of the handover determines that the handover belongs to a handover across the CN.
  • Step 2 After the handover is completed, the UE capability information is sent to the MME by using a UE CAPABILITY INFO INDICATION message.
  • the UE dynamically sends the UE capability information to the core network (CN), which omits the step of the UE capability query when the UE initiates random access in the cell, and reduces the random access. Delay.
  • CN core network
  • FIG. 7 is a flowchart of the cross-MME handover signaling in the improved LTE system according to the preferred embodiment 1 of the present invention, which is based on the flow of FIG. The figure is improved.
  • the improved process is shown in Figure 7.
  • the target side base station has sent a Handover Nofity message to the core network (see step 13 in the figure).
  • Step 1 The target base station (Target eNB) judges that this time is a cross-CN handover.
  • Step 2 After the handover is completed, the content in the handover request container is decoded, and the carried UE capability information is sent to the core network through the UE CAPABILITY INFO INDICATION message (as shown in the figure).
  • the preferred embodiment is described by taking a GSM/EDGE radio access network (GERAN) to a long term evolution (LTE) cross-CN handover as an example, and FIG. 8 is according to the present invention.
  • GERAN GSM/EDGE radio access network
  • LTE long term evolution
  • FIG. 8 is according to the present invention.
  • FIG. 9 is a flow chart of the improved GERAN to LTE cross-CN handover signaling according to the preferred embodiment 2 of the present invention.
  • the target side base station has sent a Handover Nofity message to the core network (see step 6 in the figure).
  • Step 1 The target base station (Target eNB) judges that this time is a cross-CN handover.
  • Step 2 After the handover is completed, the content in the handover request container is decoded, and the carried UE capability information is sent to the core network through the UE CAPABILITY INFO INDICATION message (as shown in the figure).
  • FIG. 10 is a general UTRAN to LTE cross-CN handover signaling flowchart according to a preferred embodiment 3 of the present invention
  • FIG. 11 is a preferred implementation according to the present invention.
  • Step 1 The target base station (Target eNB) judges that this time is a cross-CN handover.
  • Step 2 After the handover is completed, the content in the handover request container is decoded, and the carried UE capability information is sent to the core network through the UE CAPABILITY INFO INDICATION message (as shown in the figure).
  • a software is provided that is configured to perform the technical solutions described in the above embodiments and preferred embodiments.
  • a storage medium in which the above software is stored, including but not limited to an optical disk, a floppy disk, a hard disk, an erasable memory, and the like.
  • modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • a method, an apparatus, and a system for acquiring capability information provided by the embodiments of the present invention have the following beneficial effects: solving the long access delay after inter-eNB handover based on the S1 interface in the related art.
  • the problem is that the access delay after inter-eNB handover across the CN is reduced, and the user experience is improved.

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Abstract

本发明公开了一种能力信息获取方法、装置及系统，其中，该方法包括：发生切换的目标基站判断本次切换的切换类型是否为跨CN切换；如果是，则在切换完成后所述目标基站获取切换终端UE的能力信息，并将所述UE的能力信息发送给CN。通过本发明，解决了相关技术中基于S1接口的跨CN的eNB间切换后的接入时延较长的问题，减小了跨CN的eNB间切换后的接入时延，提升了用户体验。

Description

能力信息获取方法、装置及系统 技术领域
本发明涉及通信领域，具体而言，涉及一种能力信息获取方法、装置及系统。
背景技术
在相关协议中，从演进分组系统(Evolved Packet System，简称为EPS)的角度描述了演进的通用移动通讯系统陆地无线接入网(Evolved UTRAN(Universal Mobile Telecommunications System Terrestrial Radio Access Network))内的演进的基站(NodeB)(Evolved NodeB，简称为eNodeB，eNB)的切换过程。图1是根据相关技术的长期演进(LTE)系统内跨移动性管理实体(Mobility Management Entity，简称为MME)切换信令流程图，如图1所示，E-UTRAN内的eNB间切换过程又分为以下两类：
一、基于X2接口的eNB间切换：
此切换过程中MME未改变。又可以根据服务网关(Serving Gateway，简称为S-GW)是否重定向分为X2切换(S-GW未改变)流程、X2切换S-GW重定向切换流程。切换准备阶段源eNB决定哪些承载需要进行分组转发。
二、基于S1接口的eNB间切换：
基于X2接口的切换不可用时，E-UTRAN可以发起基于S1的切换。此过程中MME可以重定向、S-GW也可能重定向。当UE已经移动离开为其服务的MME时，MME需要重定向，源MME选择目标MME，目标MME决定S-GW是否重定向。
源eNB决定哪些承载需要进行分组转发(DL FORWARDING)。分组转发可以采用直接方式通过源eNB直接转发到目标MME，也可以间接地通过源或者目标S-GW转发。源eNB判断X2连接可用，则采用直接方式；若不可用则采用间接转发方式。
协议规定跨核心网(Core Network，简称为CN)节点之间是不能传递用户设备(User Equipment，简称为UE，也称终端)能力相关的信息的，所以UE在发生跨CN的切换之后，在切换目标小区所对应的MME是没有保存UE的能力信息。当UE切换到目标小区之后，可能因为用户激活定时器(User Inactive)定时器超时释放进去空闲(IDLE)态。之后如果UE要发起随机接入，此时接入的过程中，核心网由于没有该 UE的能力信息，所以空口会发起UE能力查询过程获取UE能力信息。这一过程会导致UE接入时延的增加。
针对相关技术中基于S1接口的跨CN的eNB间切换后的接入时延较长的问题，目前尚未提出有效的解决方案。
发明内容
本发明实施例提供了一种能力信息获取方法、装置及系统，以至少解决相关技术中基于S1接口的跨CN的eNB间切换后的接入时延较长的问题。
根据本发明的一个实施例，提供了一种能力信息获取方法，包括：发生切换的目标基站判断本次切换的切换类型是否为跨核心网CN切换；如果是，则在切换完成后所述目标基站获取切换终端UE的能力信息，并将所述UE的能力信息发送给CN。
本实施例中，在切换完成后所述目标基站获取切换UE的能力信息包括：在切换完成后，所述目标基站将切换请求中携带的所述UE的能力信息保存。
本实施例中，在所述目标基站将所述UE的能力信息发送给CN之后，还包括：所述CN在所述UE在此次切换至的小区发起随机接入的情况下，在上下文建立请求中携带所述UE的能力信息。
本实施例中，在所述UE在此次切换至的小区发起随机接入之前，还包括：所述UE在所述切换至的小区从连接态变为空闲IDLE态。
根据本发明的另一实施例，提供了一种能力信息获取方法，包括：核心网CN接收从发生切换的目标基站发来的切换终端UE的能力信息，其中，所述目标基站判断本次切换的切换类型是否为跨CN切换，如果是，则在切换完成后获取所述UE的能力信息；所述CN在所述UE在此次切换至的小区发起随机接入的情况下，在上下文建立请求中携带所述UE的能力信息。
根据本发明的再一实施例，提供了一种能力信息获取装置，位于发生切换的目标基站，包括：判断模块，设置为判断本次切换的切换类型是否为跨核心网CN切换；第一发送模块，设置为在所述判断模块的判断结果为是的情况下，在切换完成后所述目标基站获取切换终端UE的能力信息，并将所述UE的能力信息发送给核心网。
本实施例中，所述第一发送模块包括：保存单元，设置为在切换完成后，将切换请求中携带的所述UE的能力信息保存。
根据本发明的再一实施例，还提供了另一种能力信息获取装置，位于核心网CN，包括：接收模块，设置为接收从发生切换的目标基站发来的切换终端UE的能力信息，其中，所述目标基站判断本次切换的切换类型是否为跨CN切换，如果是，则在切换完成后获取所述UE的能力信息；第二发送模块，设置为在所述UE在此次切换至的小区发起随机接入的情况下，在上下文建立请求中携带所述UE的能力信息。
本实施例中，所述第二发送模块设置为：所述UE在所述切换至的小区从连接态变为空闲IDLE态；在所述UE在此次切换至的小区发起随机接入的情况下，在上下文建立请求中携带所述UE的能力信息。
根据本发明的还一实施例，提供了一种能力信息获取系统，包括上述的位于发生切换的目标基站的能力信息获取装置，以及上述的位于核心网CN的能力信息获取装置。
通过本发明实施例，采用发生切换的目标基站判断本次切换的切换类型是否为跨CN切换；如果是，则在切换完成后所述目标基站获取切换终端UE的能力信息，并将所述UE的能力信息发送给CN的方式，解决了相关技术中基于S1接口的跨CN的eNB间切换后的接入时延较长的问题，减小了跨CN的eNB间切换后的接入时延，提升了用户体验。
附图说明
此处所说明的附图用来提供对本发明的进一步理解，构成本申请的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1是根据相关技术的LTE系统内跨MME切换信令流程图；
图2是根据本发明实施例的一种能力信息获取方法的流程图；
图3是根据本发明实施例的一种能力信息获取装置的结构框图；
图4是根据本发明实施例的另一种能力信息获取方法的流程图；
图5是根据本发明实施例的另一种能力信息获取装置的结构框图；
图6是根据本发明实施例的能力信息获取系统的结构框图；
图7是根据本发明优选实施例1的改进后的LTE系统内跨MME切换信令流程图；
图8是根据本发明优选实施例2的通常的GERAN到LTE的跨CN切换信令流程图；
图9是根据本发明优选实施例2的改进的GERAN到LTE的跨CN切换信令流程图；
图10是根据本发明优选实施例3的通常的UTRAN到LTE的跨CN切换信令流程图；
图11是根据本发明优选实施例3的改进的UTRAN到LTE的跨CN切换信令流程图。
具体实施方式
下文中将参考附图并结合实施例来详细说明本发明。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组合。
在本实施例中，提供了一种能力信息获取方法，图2是根据本发明实施例的一种能力信息获取方法的流程图，如图2所示，该方法包括如下步骤：
步骤S202，发生切换的目标基站判断本次切换的切换类型是否为跨CN切换；
步骤S204，如果是，则在切换完成后所述目标基站获取切换终端UE的能力信息，并将所述UE的能力信息发送给CN。
本实施例通过上述步骤，发生切换的目标基站在发现本次切换为跨CN切换的情况下，在切换完成后获取切换UE的能力信息，并将该能力信息发送给核心网，从而使得核心网能够在跨CN切换的情况下也能够获取到UE的能力信息，节省了UE再次发起接入时核心网对UE发起的能力查询过程，解决了相关技术中基于S1接口的跨CN的eNB间切换后的接入时延较长的问题，减小了跨CN的eNB间切换后的接入时延，提升了用户体验。
本实施例中，在切换完成后所述目标基站获取切换UE的能力信息的过程中，所述目标基站还可以将切换请求中携带的所述UE的能力信息保存。
本实施例中，在所述目标基站将所述UE的能力信息发送给CN之后，如果所述UE在此次切换至的小区再次发起随机接入，则所述CN可以在上下文建立请求中携带所述UE的能力信息。
其中，在所述UE在此次切换至的小区再次发起随机接入之前，所述UE在所述切换至的小区可以是从连接态变为空闲(IDLE)态。
对应于上述一种能力信息获取方法，在本实施例中还提供了一种能力信息获取装置，位于发生切换的目标基站，该装置设置为实现上述实施例及优选实施方式，已经进行过说明的不再赘述。如以下所使用的，术语“模块”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置较佳地以软件来实现，但是硬件，或者软件和硬件的组合的实现也是可能并被构想的。
图3是根据本发明实施例的一种能力信息获取装置的结构框图，如图3所示，该装置包括判断模块32和第一发送模块34，下面对各个模块进行详细说明：
判断模块32，设置为判断本次切换的切换类型是否为跨CN切换；第一发送模块34，与判断模块32相连，设置为在所述判断模块32的判断结果为是的情况下，在切换完成后所述目标基站获取切换终端UE的能力信息，并将所述UE的能力信息发送给CN。
本实施例中，所述第一发送模块34可以包括：保存单元，设置为在切换完成后，将切换请求中携带的所述UE的能力信息保存。
在本实施例中，还提供了另一种能力信息获取方法，图4是根据本发明实施例的另一种能力信息获取方法的流程图，如图4所示，该方法包括如下步骤：
步骤S402，CN接收从发生切换的目标基站发来的切换UE的能力信息，其中，所述目标基站判断本次切换的切换类型是否为跨CN切换，如果是，则在切换完成后获取所述UE的能力信息；
步骤S404，所述CN在所述UE在此次切换至的小区发起随机接入的情况下，在上下文建立请求中携带所述UE的能力信息。
本实施例通过上述步骤，核心网获取到发生跨CN切换的UE的能力信息，并在UE再次发起随机接入的情况下，能够在上下文建立请求中携带该UE的能力信息，从而节省了UE再次发起接入时核心网对UE发起的能力查询过程，解决了相关技术中基于S1接口的跨CN的eNB间切换后的接入时延较长的问题，减小了跨CN的eNB间切换后的接入时延，提升了用户体验。
对应于上述另一种能力信息获取方法，在本实施例中还提供了另一种能力信息获取装置，位于核心网(CN)，图5是根据本发明实施例的另一种能力信息获取装置的 结构框图，如图5所示，该装置包括接收模块52和第二发送模块54，下面对各个模块进行详细说明：
接收模块52，设置为接收从发生切换的目标基站发来的切换终端(UE)的能力信息，其中，所述目标基站判断本次切换的切换类型是否为跨CN切换，如果是，则在切换完成后获取所述UE的能力信息；第二发送模块54，与接收模块52相连，设置为在所述UE在此次切换至的小区发起随机接入的情况下，在上下文建立请求中携带所述UE的能力信息。
本实施例中，所述第二发送模块54可以设置为：所述UE在所述切换至的小区从连接态变为空闲(IDLE)态；在所述UE在此次切换至的小区发起随机接入的情况下，在上下文建立请求中携带所述UE的能力信息。
在本实施例中，还提供了一种能力信息获取系统，图6是根据本发明实施例的能力信息获取系统的结构框图，如图6所示，该系统包括如图3所示的位于发生切换的目标基站的能力信息获取装置30，还包括如图5所示的位于CN的能力信息获取装置50。
下面结合优选实施例进行说明，以下优选实施例结合了上述实施例及其优选实施方式。
在以下优选实施例中，提供了一种LTE(Long Term Evolution，长期演进)移动通信系统中的，跨CN切换后减小UE接入时延的方法和装置，设置为降低在跨CN切换场景下，切入到LTE小区之后再次发起随机接入的时延。
本优选实施例提供的跨CN切换后减小UE接入时延的方法和装置，包括如下主要内容：
发生切换的切换目标基站判断本次切换类型，判断本次切换是否是跨CN切换，如果是跨CN切换，则在切换完成之后，将切换请求中携带的UE能力信息保存并发送给核心网。核心网收到UE能力信息后保存完毕。之后UE在该小区下从CONNECT变为IDLE(如UserInactive功能释放)。后续再次在该小区发起随机接入时(如UE发起服务请求(Service Request))，核心网在上下文建立请求中即会携带UE能力信息，无需空口再次发起UE能力查询过程，从而减少了接入过程中eNB与UE之间Uu口的信令交互，降低了接入的时延。
如果发生切换的目标基站判断本次切换并未跨CN，则在切换完成之后，eNB无需发送UE能力信息给MME。
下面详细说明本优选实施例提供的跨CN切换后减小UE接入时延的方法和装置，其处理可以分为以下两个步骤：
步骤一、切换的目标(Target)eNB判决本次切换属于跨CN的切换。
步骤二、切换完成后，将UE能力信息通过终端能力信息指示(UE CAPABILITY INFO INDICATION)消息发送给MME。
上述方案在跨CN场景的切换完成后，通过给核心网(CN)主动发送UE能力信息，省去了后续UE在该小区发起随机接入时UE能力查询这一步骤，降低了随机接入的时延。
下面结合附图具体说明实施步骤。
实施例1
本优选实施例以LTE系统内的跨CN的切换为例进行说明，图7是根据本发明优选实施例1的改进后的LTE系统内跨MME切换信令流程图，该图基于图1的流程图进行改进，改进后流程如图7所示，目标侧基站已经发送切换通知(Handover Nofity)消息给核心网(参见图中步骤13)。
第一步：目标基站(Target eNB)判断本次为跨CN切换。
第二步：切换完成后，解码切换请求容器(Container)中的内容，将携带的UE能力信息通过UE CAPABILITY INFO INDICATION消息发送给核心网(如图所示)。
实施例2：
本优选实施例以GSM/EDGE无线接入网络(GSM EDGE Radio Access Network，简称为GERAN)到长期演进(Long Term Evolution，简称为LTE)的跨CN切换为例进行说明，图8是根据本发明优选实施例2的通常的GERAN到LTE的跨CN切换信令流程图，图9是根据本发明优选实施例2的改进的GERAN到LTE的跨CN切换信令流程图，改进后流程如图9所示，目标侧基站已经发送切换通知(Handover Nofity)消息给核心网(参见图中步骤6)。
第一步：目标基站(Target eNB)判断本次为跨CN切换。
第二步：切换完成后将，解码切换请求Container中的内容，将携带的UE能力信息通过UE CAPABILITY INFO INDICATION消息发送给核心网(如图所示)。
实施例3：
本优选实施例以UTRAN到LTE的跨CN切换为例进行说明，图10是根据本发明优选实施例3的通常的UTRAN到LTE的跨CN切换信令流程图，图11是根据本发明优选实施例3的改进的UTRAN到LTE的跨CN切换信令流程图，改进后流程如图11所示，目标侧站已经发送Handover Nofity消息给核心网(参见图中步骤6)。
第一步：目标基站(Target eNB)判断本次为跨CN切换。
第二步：切换完成后将，解码切换请求Container中的内容，将携带的UE能力信息通过UE CAPABILITY INFO INDICATION消息发送给核心网(如图所示)。
在另外一个实施例中，还提供了一种软件，该软件设置为执行上述实施例及优选实施例中描述的技术方案。
在另外一个实施例中，还提供了一种存储介质，该存储介质中存储有上述软件，该存储介质包括但不限于光盘、软盘、硬盘、可擦写存储器等。
显然，本领域的技术人员应该明白，上述的本发明的各模块或各步骤可以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，或者分布在多个计算装置所组成的网络上，可选地，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置中由计算装置来执行，并且在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤，或者将它们分别制作成各个集成电路模块，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。这样，本发明不限制于任何特定的硬件和软件结合。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。
工业实用性
如上所述，本发明实施例提供的一种能力信息获取方法、装置及系统，具有以下有益效果：解决了相关技术中基于S1接口的跨CN的eNB间切换后的接入时延较长的问题，减小了跨CN的eNB间切换后的接入时延，提升了用户体验。

Claims (10)

  1. 一种能力信息获取方法，包括：
    发生切换的目标基站判断本次切换的切换类型是否为跨核心网CN切换；
    如果是，则在切换完成后所述目标基站获取切换终端UE的能力信息，并将所述UE的能力信息发送给CN。
  2. 根据权利要求1所述的方法，其中，在切换完成后所述目标基站获取切换UE的能力信息包括：
    在切换完成后，所述目标基站将切换请求中携带的所述UE的能力信息保存。
  3. 根据权利要求1所述的方法，其中，在所述目标基站将所述UE的能力信息发送给CN之后，还包括：
    所述CN在所述UE在此次切换至的小区发起随机接入的情况下，在上下文建立请求中携带所述UE的能力信息。
  4. 根据权利要求3所述的方法，其中，在所述UE在此次切换至的小区发起随机接入之前，还包括：
    所述UE在所述切换至的小区从连接态变为空闲IDLE态。
  5. 一种能力信息获取方法，包括：
    核心网CN接收从发生切换的目标基站发来的切换终端UE的能力信息，其中，所述目标基站判断本次切换的切换类型是否为跨CN切换，如果是，则在切换完成后获取所述UE的能力信息；
    所述CN在所述UE在此次切换至的小区发起随机接入的情况下，在上下文建立请求中携带所述UE的能力信息。
  6. 一种能力信息获取装置，位于发生切换的目标基站，包括：
    判断模块，设置为判断本次切换的切换类型是否为跨核心网CN切换；
    第一发送模块，设置为在所述判断模块的判断结果为是的情况下，在切换完成后所述目标基站获取切换终端UE的能力信息，并将所述UE的能力信息发送给核心网。
  7. 根据权利要求6所述的装置，其中，所述第一发送模块包括：
    保存单元，设置为在切换完成后，将切换请求中携带的所述UE的能力信息保存。
  8. 一种能力信息获取装置，位于核心网CN，包括：
    接收模块，设置为接收从发生切换的目标基站发来的切换终端UE的能力信息，其中，所述目标基站判断本次切换的切换类型是否为跨CN切换，如果是，则在切换完成后获取所述UE的能力信息；
    第二发送模块，设置为在所述UE在此次切换至的小区发起随机接入的情况下，在上下文建立请求中携带所述UE的能力信息。
  9. 根据权利要求8所述的装置，其中，所述第二发送模块设置为：
    所述UE在所述切换至的小区从连接态变为空闲IDLE态；
    在所述UE在此次切换至的小区发起随机接入的情况下，在上下文建立请求中携带所述UE的能力信息。
  10. 一种能力信息获取系统，包括如权利要求6或7所述的位于发生切换的目标基站的能力信息获取装置，以及如权利要求8或9所述的位于核心网CN的能力信息获取装置。
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