WO2016090847A1 - 智能寻呼方法和系统、服务网关、移动管理实体 - Google Patents

智能寻呼方法和系统、服务网关、移动管理实体 Download PDF

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Publication number
WO2016090847A1
WO2016090847A1 PCT/CN2015/079090 CN2015079090W WO2016090847A1 WO 2016090847 A1 WO2016090847 A1 WO 2016090847A1 CN 2015079090 W CN2015079090 W CN 2015079090W WO 2016090847 A1 WO2016090847 A1 WO 2016090847A1
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Prior art keywords
base station
identifier
mobility management
management entity
terminal
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PCT/CN2015/079090
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English (en)
French (fr)
Inventor
汪钱纯
詹徐周
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中兴通讯股份有限公司
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Publication of WO2016090847A1 publication Critical patent/WO2016090847A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like

Definitions

  • the present invention relates to the field of packet domain evolution domain in a mobile communication system, and in particular, to an intelligent paging method and system, a service gateway, and a mobility management entity.
  • E-RAN Evolved RAN, Evolved Radio Access Network
  • the network element included in the E-RAN is an eNodeB (Evolved NodeB), which provides radio resources for access of the terminal;
  • HSS Home Subscriber Server: used to permanently store user subscription data
  • MME Mobility Management Entity
  • the entity is a control plane function entity, a server that temporarily stores user data, and is responsible for managing and storing UE contexts (such as UE/user identity, mobility management state, user security parameters, etc.). Assigning a temporary identifier to the user, when the UE is camped on the tracking area or the network is responsible for authenticating the user; processing all non-access stratum messages between the MME and the UE; triggering paging in the SAE;
  • Serving GW (Gateway, Service Gateway): This gateway is a user plane entity that is responsible for user plane data routing processing and terminates downlink data of UEs in idle state. Manage and store the SAE bearer context of the UE, such as IP bearer service parameters and network internal routing information. It is the anchor point of the internal user plane of the 3GPP system. A user can only have one Serving GW at a time;
  • PDN GW Packet Data Network Gateway
  • the functional entity generates Qos (Quality of Service) rules for controlling user data transmission based on service information, user subscription information, and operator configuration information. And billing rules.
  • the functional entity can also control the establishment and release of bearers in the access network.
  • the user is attached to the packet-domain evolving network, and the MME is restarted.
  • the Serving GW receives the downlink service (including data or signaling).
  • the Serving GW sends the downlink data arrival message to the restarted MME and carries the IMSI (International Mobile). Subscriber Identity, the MME sends a paging message to the radio access network element to page the user according to the IMSI, and the user reattaches to the network. Since the MME does not have any information previously accessed by the user, the MME needs to page the user through the entire network, resulting in a large invalid paging range, waste of radio resources, and prolonged paging, which affects the use experience of the terminal user.
  • IMSI International Mobile
  • the embodiments of the present invention provide a smart paging method and system, a service gateway, and a mobility management entity, which can at least solve the above problems in the prior art.
  • an embodiment of the present invention provides a smart paging method, including the following steps:
  • the serving gateway receives the identifier of the base station that the terminal newly accesses, and records the identifier of the base station, where the identifier of the base station includes: an identifier of the base station that the terminal newly accesses;
  • the serving gateway sends the base station identity to the mobility management entity for the mobility management entity to The base station identifier sends a paging message to the corresponding base station.
  • the base station identifier further includes: an identifier of the base station that the terminal accesses before.
  • the step of the serving gateway sending the base station identifier to the mobility management entity includes:
  • the serving gateway sends the base station identifier to the mobility management entity by using a downlink data arrival message.
  • the method further includes :
  • the serving gateway receives a paging trigger message sent by the packet data network gateway.
  • the paging trigger message includes: downlink data of the terminal, a downlink bearer setup message of the terminal, or a downlink bearer update message of the terminal.
  • the embodiment of the present invention further provides another intelligent paging method, including the following steps:
  • the mobility management entity sends the identifier of the base station newly accessed by the terminal to the serving gateway;
  • the mobility management entity When the mobility management entity is restarted, or the link between the mobility management entity and the serving gateway is interrupted, the mobility management entity receives a base station identifier sent by the serving gateway, where the base station identifier includes: The identity of the base station to which the terminal newly accesses;
  • the mobility management entity sends a paging message to the corresponding base station according to the base station identifier.
  • the base station identifier further includes an identifier of a base station that the terminal accesses before.
  • the step of the mobility management entity sending the identifier of the base station newly accessed by the terminal to the serving gateway includes:
  • the mobility management entity sends the identifier of the base station newly accessed by the terminal to the serving gateway by modifying the bearer request message.
  • the embodiment of the present invention further provides another intelligent paging method, including the following steps:
  • the mobility management entity sends the identifier of the base station newly accessed by the terminal to the serving gateway;
  • the serving gateway receives the identifier of the base station newly accessed by the terminal, and records the identifier of the base station, where the identifier of the base station includes: an identifier of the base station newly accessed by the terminal;
  • the serving gateway sends the base station identifier to the mobility management entity;
  • the mobility management entity sends a paging message to the corresponding base station according to the base station identifier.
  • the base station identifier further includes: an identifier of the base station that the terminal accesses before.
  • the embodiment of the present invention further provides a service gateway, including: a recording module and a sending module;
  • the recording module is configured to: when the base station accessed by the terminal changes, receive an identifier of the base station newly accessed by the terminal, and record the identifier of the base station, where the identifier of the base station includes: an identifier of the base station newly accessed by the terminal ;
  • the sending module configured to send the base station identifier to the mobility management entity for the mobile when the mobility management entity restarts, or the link between the mobility management entity and the serving gateway is interrupted
  • the management entity sends a paging message to the corresponding base station according to the base station identifier.
  • the embodiment of the present invention further provides a mobility management entity, including: a sending module, a receiving module, and a paging module;
  • the sending module is configured to: when the base station accessed by the terminal changes, send the identifier of the base station newly accessed by the terminal to the serving gateway;
  • the receiving module is configured to: when the mobility management entity is restarted, or the link between the mobility management entity and the serving gateway is interrupted, receive a base station identifier sent by the serving gateway, where the base station identifier includes: The identifier of the base station newly accessed by the terminal;
  • the paging module is configured to send a paging message to the corresponding base station according to the base station identifier.
  • the present invention also provides an intelligent paging system including Mobile management entity and service gateway as described above.
  • An embodiment of the present invention provides an intelligent paging method and system, a service gateway, and a mobility management entity.
  • the intelligent paging method provided by the present invention includes: when a base station accessed by a terminal changes, the serving gateway receives the An identifier of the base station newly accessed by the terminal, and recording the identifier of the base station, where the identifier of the base station includes: an identifier of the base station newly accessed by the terminal; when the mobility management entity restarts, or between the mobility management entity and the service gateway When the link is interrupted, the serving gateway sends the base station identifier to the mobility management entity, so that the mobility management entity sends a paging message to the corresponding base station according to the base station identifier; the method of the present invention may enable After the restart, the MME pages the user under the last visited base station, and does not need to poke the user on the whole network.
  • the intelligent paging method of the present invention can reduce the paging range, reduce the paging load, and reduce the paging load.
  • the waste of radio resources reduces the paging delay of the MME restart and downlink service recovery, which improves the user experience.
  • FIG. 2 is a schematic flowchart of a smart paging method according to Embodiment 1 of the present invention
  • FIG. 3 is a schematic flowchart of a smart paging method according to Embodiment 2 of the present invention.
  • FIG. 4 is a schematic flowchart of a smart paging method according to Embodiment 3 of the present invention.
  • FIG. 5 is a schematic flowchart of a method for intelligent paging in a paging process triggered by MME restart and downlink data according to Embodiment 3 of the present invention
  • FIG. 6 is a schematic flowchart of a method for intelligent paging in a paging process triggered by a MME restart and a downlink bearer setup message according to Embodiment 3 of the present invention
  • FIG. 7 is a schematic flowchart of a method for intelligent paging in a paging process triggered by an MME restarting and a downlink bearer update message according to Embodiment 3 of the present invention
  • FIG. 8 is a schematic structural diagram of a service gateway according to Embodiment 4 of the present invention.
  • FIG. 9 is a schematic structural diagram of a mobility management entity according to Embodiment 4 of the present invention.
  • FIG. 10 is a schematic structural diagram of an intelligent paging system according to Embodiment 4 of the present invention.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • this embodiment provides an intelligent paging.
  • the method is applied to the service gateway side, as shown in FIG. 2, and includes the following steps:
  • Step 201 When the base station accessed by the terminal changes, the serving gateway receives the identifier of the base station newly accessed by the terminal, and records the identifier of the base station, where the identifier of the base station includes: an identifier of the base station newly accessed by the terminal.
  • the change of the base station to which the terminal accesses in this step refers to: the base station currently accessed by the terminal is different from the previously accessed base station, and the entity that detects the change of the base station accessed by the terminal in this step may be a mobility management entity, or may be Other network elements.
  • the step further records the identifier of the base station that the terminal accesses before, and the base station identifier may include: the identifier of the new access terminal and the previously accessed base station.
  • the serving gateway may record the identifier of the base station that is accessed by the terminal in the form of a list.
  • the identifier of the base station may include: an identifier of the base station newly accessed by the terminal, and a list of base station identifiers previously accessed.
  • Step 202 When the mobility management entity restarts, or the link between the mobility management entity and the serving gateway is interrupted, the serving gateway sends the base station identifier to the mobility management entity for the mobile The management entity sends a paging message to the corresponding base station according to the base station identifier.
  • the main body that detects the restart of the mobility management entity or the link interruption in this step may be: a service gateway or other network element.
  • the base station identifier includes the identifier of the base station newly accessed by the terminal
  • the mobile management entity is paging the user under the base station of the last terminal access; when the base station identifier includes the port: the new access of the terminal and the identity of the previously accessed base station, the mobile management entity is available for the last time and before The user is paged under the base station (e.g., last time).
  • the serving gateway may send the identifier of the newly accessed base station to the MME, and the MME may be the last base station accessed by the terminal. Paging the user; preferably, the serving gateway may also send the identity of the new access and the previously accessed base station to the MME, and the MME may page the user before the terminal access and the newly accessed base station. The MME can page the user under the last terminal access and the previously accessed base station, thereby avoiding the MM needing to perform network-wide paging.
  • the serving gateway in the step sends the base station identifier to the mobility management entity by using a downlink data arrival message. That is, the base station identifier is carried by the downlink data arrival message.
  • the method in this embodiment may be configured to enable the user to page the user under the corresponding base station according to the identifier of the base station when the MME is restarted, and does not require the entire network to page the user.
  • the smart paging method in this embodiment may not be reduced.
  • the paging success rate the paging range is reduced, the paging load is reduced, the radio resource waste is reduced, the paging delay of the MME restart and the downlink service recovery is reduced, and the user experience is improved.
  • the method further includes: The serving gateway receives a paging trigger message sent by the packet data network gateway.
  • the method only sends the base station identifier to the MME after the paging trigger message is received, so that the MME can page the user.
  • the paging trigger message in the method in this embodiment may include: downlink data of the terminal, a downlink bearer setup message of the terminal, or a downlink bearer update message of the terminal.
  • the method of the embodiment can be applied in an SAE architecture.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • This embodiment provides an intelligent paging method, which is applied to the mobile management entity side, as shown in FIG. 3, and includes the following steps:
  • Step 301 When the base station accessed by the terminal changes, the mobility management entity sends the identifier of the base station newly accessed by the terminal to the serving gateway.
  • the mobility management entity may detect whether the base station accessed by the terminal changes.
  • the mobility management entity may acquire the identifier of the newly accessed base station when detecting the change of the base station accessed by the terminal, and then send the identifier to the serving gateway for the service gateway to record.
  • Step 302 When the mobility management entity restarts, or the link between the mobility management entity and the serving gateway is interrupted, the mobility management entity receives a base station identifier sent by the serving gateway, where the base station identifier includes: The identifier of the base station to which the terminal newly accesses.
  • the serving gateway may detect whether the MME restarts or whether the link between the MME and the serving gateway is interrupted. After detecting the MME restart or the link interruption, the MME receives the base station identifier sent by the service network, and then pages the user under the corresponding base station according to the base station identifier.
  • the identifier of the base station in the step may further include: an identifier of the base station that the terminal accesses before; and the identifier of the base station that the MME receives the base station includes: an identifier of the base station that is accessed by the terminal and newly accessed.
  • Step 303 The mobility management entity sends a paging message to the corresponding base station according to the base station identifier.
  • the method in this embodiment introduces the process on the opposite side of the method of the first embodiment.
  • the smart paging method in this embodiment can enable the MME to page the user under the corresponding base station according to the identifier of the base station, for example, the paging of the base station accessed by the last terminal. Or the paging of the base station that has been accessed in the last time and before; the MME is configured to avoid the paging success rate of the MME.
  • the intelligent paging method of this embodiment can be used without reducing the paging success rate.
  • the paging range is reduced, the paging load is reduced, the radio resource waste is reduced, the paging delay of the MME restart and the downlink service recovery is reduced, and the user body is improved. Test.
  • the mobility management entity sends the identifier of the base station that the terminal newly accesses to the serving gateway by modifying the bearer request message, that is, by modifying the bearer request message, carrying the identifier of the base station newly accessed by the terminal, Then send it to the service gateway.
  • the method of the embodiment can be applied in an SAE architecture.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • the embodiment provides a smart paging method, which is applied to the service gateway side and the mobile management entity side. As shown in FIG. 4, the method includes the following steps:
  • Step 401 When it is detected that the base station accessed by the terminal changes, the mobility management entity sends the identifier of the base station newly accessed by the terminal to the serving gateway.
  • Step 402 The serving gateway receives the identifier of the base station newly accessed by the terminal, and records the identifier of the base station, where the identifier of the base station includes: an identifier of the base station newly accessed by the terminal.
  • Step 403 When the mobility management entity restarts, or the link between the mobility management entity and the serving gateway is interrupted, the serving gateway sends the base station identifier to the mobility management entity.
  • Step 404 The mobility management entity sends a paging message to the corresponding base station according to the base station identifier.
  • the MME when the MME restarts or the link between the MME and the serving gateway is interrupted, the MME can page the user under the latest access base station, thereby avoiding the entire network paging user; Compared with the technology, the paging range can be reduced, the paging load can be reduced, the radio resource waste can be reduced, the paging delay of the MME restart and the downlink service recovery can be reduced, and the user experience can be improved.
  • the identifier of the base station in this embodiment may include: an identifier of the new access terminal and the previously accessed base station; at this time, using the smart paging method of the present invention, restarting at the MME or the MME and the service
  • the MME can page the users under the latest access and the previously accessed base stations, thereby avoiding the entire network paging users; compared with the prior art, the paging success can be reduced.
  • the rate the paging range is reduced, the paging load is reduced, the radio resource waste is reduced, the paging delay of the MME restart and the downlink service recovery is reduced, the user experience is improved, and the paging success rate is ensured.
  • the smart paging method of the embodiment further needs to trigger the MME paging process after receiving the paging trigger message by the serving gateway; specifically, the mobile management entity restarts or links are detected in the method in this embodiment.
  • the method further includes: the serving gateway receiving a paging trigger message sent by the packet data network gateway.
  • the paging trigger message includes: downlink data of the terminal, a downlink bearer setup message of the terminal, or a downlink bearer update message of the terminal.
  • the new eNodeB identifier is the identifier of the newly accessed eNodeB
  • the UE accesses the eNodeB identifier list before the terminal recorded in the form of a list.
  • the smart paging method in this embodiment includes the following steps:
  • Step 501 The user initiates an attach message or a tracking area update message to the network.
  • Step 502 The mobility management entity detects an eNodeB change.
  • Step 503 The mobility management entity sends a modify bearer request message to the serving gateway, where the message includes a new eNodeB identifier.
  • Step 504 The serving gateway records the new eNodeB identifier, and the optional UE accesses the eNodeB identifier list before;
  • This step includes two cases. One is that the serving gateway only records the new eNodeB identifier, and the other is that the serving gateway records the new eNodeB identifier and the UE accesses the eNodeB identifier list before.
  • Step 505 The serving gateway sends a modify bearer response message to the mobility management entity.
  • Step 506 performing other process processing of attaching or tracking area update
  • Step 507 the serving gateway detects that the mobility management entity restarts or the link is interrupted; in this step, the link interruption is a link terminal between the MME and the serving gateway;
  • Step 508 The serving gateway receives the downlink data of the user from the packet data network gateway.
  • Step 509 The serving gateway sends a downlink data arrival message to the mobility management entity, where the message includes an eNodeB identifier and/or an eNodeB identifier list.
  • Step 510 The mobility management entity sends a downlink data arrival response message to the serving gateway.
  • Step 511 The mobility management entity sends a paging message to the corresponding eNodeB according to the eNodeB identifier and/or the eNodeB identifier list.
  • Step 512 The base station sends a paging message to the user.
  • step 513 the user reattaches to the network.
  • the smart paging method in this embodiment includes the following steps:
  • Step 601 The user initiates an attach message or a tracking area update message to the network.
  • Step 602 The mobility management entity detects an eNodeB change.
  • Step 603 The mobility management entity sends a modify bearer request message to the serving gateway, where the message includes a new eNodeB identifier.
  • Step 604 the serving gateway records the new eNodeB identifier, and the optional UE accesses the eNodeB identifier list before;
  • Step 605 The serving gateway sends a modify bearer response message to the mobility management entity.
  • Step 606 performing other process processing of attaching or tracking area update
  • Step 607 the serving gateway detects that the mobility management entity restarts or the link is interrupted; in this step, the link interruption is a link terminal between the MME and the serving gateway;
  • Step 608 the serving gateway receives the bearer establishment request of the user from the packet data network gateway. interest;
  • Step 609 The serving gateway sends a downlink data arrival message to the mobility management entity, where the message includes an eNodeB identifier and/or an eNodeB identifier list.
  • Step 610 The mobility management entity sends a downlink data arrival response message to the serving gateway.
  • Step 611 The mobility management entity sends a paging message to the corresponding eNodeB according to the eNodeB identifier and/or the eNodeB identifier list.
  • Step 612 The base station sends a paging message to the user.
  • step 613 the user reattaches to the network.
  • the smart paging method in this embodiment includes the following steps:
  • Step 701 The user initiates an attach message or a tracking area update message to the network.
  • Step 702 The mobility management entity detects an eNodeB change.
  • Step 703 The mobility management entity sends a modify bearer request message to the serving gateway, where the message includes a new eNodeB identifier.
  • Step 704 The serving gateway records the new eNodeB identifier, and the optional UE accesses the eNodeB identifier list before;
  • Step 705 The serving gateway sends a modify bearer response message to the mobility management entity.
  • Step 706 performing other process processing of attaching or tracking area update
  • Step 707 the serving gateway detects that the mobility management entity restarts or the link is interrupted; in this step, the link interruption is a link terminal between the MME and the serving gateway;
  • Step 708 The serving gateway receives the bearer update request message of the user from the packet data network gateway.
  • Step 709 The serving gateway sends a downlink data arrival message to the mobility management entity, where the message includes an eNodeB identifier and/or an eNodeB identifier list.
  • Step 710 The mobility management entity sends a downlink data arrival response message to the serving gateway.
  • Step 711 The mobility management entity sends a paging message to the corresponding eNodeB according to the eNodeB identifier and/or the eNodeB identifier list.
  • Step 712 The base station sends a paging message to the user.
  • step 713 the user reattaches to the network.
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • This embodiment provides a service gateway, as shown in FIG. 8, including: a recording module and a sending module;
  • the recording module is configured to: when the base station accessed by the terminal changes, receive an identifier of the base station newly accessed by the terminal, and record the identifier of the base station, where the identifier of the base station includes: an identifier of the base station newly accessed by the terminal ;
  • the sending module configured to send the base station identifier to the mobility management entity for the mobile when the mobility management entity restarts, or the link between the mobility management entity and the serving gateway is interrupted
  • the management entity sends a paging message to the corresponding base station according to the base station identifier.
  • the serving gateway of this embodiment may enable the MME to page the user under the corresponding base station according to the identifier of the base station after the restart, and does not require the entire network to page the user. Compared with the prior art, the serving gateway of the embodiment may not lower the search. In the case of the call success rate, the paging range is reduced, the paging load is reduced, the radio resource waste is reduced, the paging delay of the MME restart and the downlink service recovery is reduced, and the user experience is improved.
  • the embodiment further provides a mobility management entity, as shown in FIG. 9, comprising: a sending module, a receiving module, and a paging module;
  • the sending module is configured to: when the base station accessed by the terminal changes, send the identifier of the base station newly accessed by the terminal to the serving gateway;
  • the receiving module is configured to receive, when the mobility management entity restarts, or the link between the mobility management entity and the serving gateway is interrupted, receive a base station identifier sent by the serving gateway,
  • the identifier of the base station includes: an identifier of a base station newly accessed by the terminal;
  • the paging module is configured to send a paging message to the corresponding base station according to the base station identifier.
  • the mobility management entity provided in this embodiment may enable the MME to page the user under the corresponding base station according to the identifier of the base station, and avoid the MME all-network paging user.
  • the smart paging method in this embodiment may not be reduced.
  • the paging success rate the paging range is reduced, the paging load is reduced, the radio resource waste is reduced, the paging delay of the MME restart and the downlink service recovery is reduced, and the user experience is improved.
  • the embodiment further provides an intelligent paging system, including the service gateway and the mobility management entity as described above; the working process of the system includes:
  • the mobility management entity sends the identifier of the base station newly accessed by the terminal to the serving gateway;
  • the serving gateway receives the identifier of the base station newly accessed by the terminal, and records the identifier of the base station, where the identifier of the base station includes: an identifier of the base station newly accessed by the terminal;
  • the serving gateway sends the base station identifier to the mobility management entity;
  • the mobility management entity sends a paging message to the corresponding base station according to the base station identifier.
  • the disclosed apparatus and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner such as: multiple units or components may be combined, or Can be integrated into another A system, or some features can be ignored or not executed.
  • the coupling, or direct coupling, or communication connection of the components shown or discussed may be indirect coupling or communication connection through some interfaces, devices or units, and may be electrical, mechanical or other forms. of.
  • the units described above as separate components may or may not be physically separated, and the components displayed as the unit may or may not be physical units, that is, may be located in one place or distributed to multiple network units; Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing module, or each unit may be separately used as one unit, or two or more units may be integrated into one unit; the above integration
  • the unit can be implemented in the form of hardware or in the form of hardware plus software functional units.
  • the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed.
  • the foregoing storage device includes the following steps: the foregoing storage medium includes: a mobile storage device, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.
  • ROM read-only memory
  • RAM random access memory
  • magnetic disk or an optical disk.
  • optical disk A medium that can store program code.

Abstract

本发明公开了一种智能寻呼方法和系统、服务网关、移动管理实体。本发明的智能寻呼方法包括：当终端接入的基站发生改变时，服务网关接收所述终端新接入的基站的标识，并记录基站标识，所述基站标识包括：所述终端新接入的基站的标识；当移动管理实体重启、或者所述移动管理实体与所述服务网关之间的链路中断时，所述服务网关将所述基站标识发送给所述移动管理实体，以供所述移动管理实体根据所述基站标识向对应的基站发送寻呼消息。

Description

智能寻呼方法和系统、服务网关、移动管理实体 技术领域
本发明涉及移动通讯系统中分组域演进域技术领域，尤其涉及一种智能寻呼方法和系统、服务网关、移动管理实体。
背景技术
3GPP(3rd Generation Partnership Project，第三代合作伙伴计划)的下一代移动无线网络的项目SAE(System Architecture Evolution，系统架构演进)，SAE的架构如图1所示，其中包含了如下网元：
E-RAN(Evolved RAN，演进的无线接入网)：可以提供更高的上下行速率，更低的传输延迟和更加可靠的无线传输。E-RAN中包含的网元是eNodeB(Evolved NodeB，演进基站)，为终端的接入提供无线资源；
HSS(Home Subscriber Server，归属用户服务器)：用于永久存储用户签约数据；
MME(Mobility Management Entity，移动管理实体)：该实体为控制面功能实体，临时存储用户数据的服务器，负责管理和存储UE上下文(比如UE/用户标识，移动性管理状态，用户安全参数等)，为用户分配临时标识，当UE驻扎在该跟踪区域或者该网络是负责对该用户进行鉴权；处理MME和UE之间的所有非接入层消息；触发在SAE的寻呼；
Serving GW(Gateway，服务网关)：该网关是一个用户面实体，负责用户面数据路由处理，终结处于空闲状态的UE的下行数据。管理和存储UE的SAE承载(bearer)上下文，比如IP承载业务参数和网络内部路由信息等。是3GPP系统内部用户面的锚点，一个用户在一个时刻只能有一个Serving GW；
PDN GW(分组数据网网关)：负责UE接入PDN的网关，分配用户IP地 址，同时是3GPP和非3GPP接入系统的移动性锚点。用户在同一时刻能够接入多个PDN GW；
PCRF(Policy and Charging Rule Functionality，策略和合计费规则功能实体)：该功能实体主要根据业务信息和用户签约信息以及运营商的配置信息产生控制用户数据传递的Qos(Quality of Service，服务质量)规则以及计费规则。该功能实体也可以控制接入网中承载的建立和释放。
用户附着到分组域演进网络，MME重启，Serving GW收到下行业务(包括数据或信令)，按照目前3GPP标准实现，Serving GW发送下行数据到达消息给重启恢复的MME，携带IMSI(Internat ional Mobile Subscriber Identity，国际移动用户识别码)，MME则根据IMSI向无线接入网元发送寻呼消息寻呼用户，用户再重新附着到网络。由于MME没有用户之前接入的任何信息，MME需全网寻呼用户，导致无效寻呼范围大，无线资源浪费，寻呼时延长，影响终端用户的使用感受。
发明内容
有鉴于此，本发明实施例提供了一种智能寻呼方法和系统、服务网关、移动管理实体，能够至少解决现有技术中存在的上述问题。
为解决上述技术问题，本发明实施例提供一种智能寻呼方法，包括如下步骤：
当终端接入的基站发生改变时，服务网关接收所述终端新接入的基站的标识，并记录基站标识，所述基站标识包括：所述终端新接入的基站的标识；
当移动管理实体重启、或者所述移动管理实体与所述服务网关之间的链路中断时，所述服务网关将所述基站标识发送给所述移动管理实体，以供所述移动管理实体根据所述基站标识向对应的基站发送寻呼消息。
优选地，所述基站标识还包括：终端之前接入的基站的标识。
优选地，所述服务网关将基站标识发送给所述移动管理实体的步骤包括：
所述服务网关通过下行数据到达消息将基站标识发送给所述移动管理实体。
优选地，当移动管理实体重启、或者所述移动管理实体与所述服务网关之间的链路中断时，在所述服务网关将基站标识发送给所述移动管理实体之前，所述方法还包括：
所述服务网关接收分组数据网网关发送的寻呼触发消息。
优选地，所述寻呼触发消息包括：所述终端的下行数据、所述终端的下行承载建立消息或者所述终端的下行承载更新消息。
同样为了解决上述技术问题，本发明实施例还提供了另一种智能寻呼方法，包括如下步骤：
当终端接入的基站发生改变时，移动管理实体将所述终端新接入的基站的标识发送给服务网关；
当所述移动管理实体重启、或者所述移动管理实体与所述服务网关之间的链路中断时，所述移动管理实体接收所述服务网关发送的基站标识，所述基站标识包括：所述终端新接入的基站的标识；
所述移动管理实体根据所述基站标识向对应的基站发送寻呼消息。
优选地，所述基站标识还包括终端之前接入的基站的标识。
优选地，所述移动管理实体将所述终端新接入的基站的标识发送给服务网关的步骤包括：
所述移动管理实体通过修改承载请求消息将所述终端新接入的基站的标识发送给服务网关。
同样为了解决上述技术问题，本发明实施例还提供了另一种智能寻呼方法，包括如下步骤：
当终端接入的基站发生改变时，所述移动管理实体将所述终端新接入的基站的标识发送给服务网关；
所述服务网关接收所述终端新接入的基站的标识，并记录基站标识，所述基站标识包括：所述终端新接入的基站的标识；
当移动管理实体重启、或者所述移动管理实体与所述服务网关之间的链路中断时，所述服务网关将基站标识发送给所述移动管理实体；
所述移动管理实体根据所述基站标识向对应的基站发送寻呼消息。
优选地，所述基站标识还包括：终端之前接入的基站的标识。
同样为了解决上述技术问题，本发明实施例还提供了一种服务网关，包括：记录模块和发送模块；
所述记录模块，用于当终端接入的基站发生改变时，接收所述终端新接入的基站的标识，并记录基站标识，所述基站标识包括：所述终端新接入的基站的标识；
所述发送模块，用于当移动管理实体重启、或者所述移动管理实体与所述服务网关之间的链路中断时，将所述基站标识发送给所述移动管理实体，以供所述移动管理实体根据所述基站标识向对应的基站发送寻呼消息。
同样为了解决上述技术问题，本发明实施例还提供了一种移动管理实体，包括：发送模块、接收模块和寻呼模块；
所述发送模块，用于当终端接入的基站发生改变时，将所述终端新接入的基站的标识发送给服务网关；
所述接收模块，用于当所述移动管理实体重启、或者所述移动管理实体与所述服务网关之间的链路中断时，接收所述服务网关发送的基站标识，所述基站标识包括：所述终端新接入的基站的标识；
所述寻呼模块，用于根据所述基站标识向对应的基站发送寻呼消息。
同样为了解决上述技术问题，本发明还提供了一种智能寻呼系统包括 如上所述的移动管理实体和服务网关。
本发明的有益效果是：
本发明实施例提供了一种智能寻呼方法和系统、服务网关、移动管理实体，具体地，本发明提供的智能寻呼方法包括：当终端接入的基站发生改变时，服务网关接收所述终端新接入的基站的标识，并记录基站标识，所述基站标识包括：所述终端新接入的基站的标识；当移动管理实体重启、或者所述移动管理实体与所述服务网关之间的链路中断时，所述服务网关将所述基站标识发送给所述移动管理实体，以供所述移动管理实体根据所述基站标识向对应的基站发送寻呼消息；本发明的方法可以使得MME在重启之后在最近一次接入的基站下寻呼用户，不需要全网寻呼用户，与现有技术相比，本发明的智能寻呼方法可以缩小寻呼范围，降低寻呼负荷，减少无线资源浪费，减少了MME重启，下行业务恢复的寻呼时延，提升了用户体验。
附图说明
图1为现有技术中SAE的架构示意图；
图2为本发明实施例一提供的一种智能寻呼方法的流程示意图；
图3为本发明实施例二提供的一种智能寻呼方法的流程示意图；
图4为本发明实施例三提供的一种智能寻呼方法的流程示意图；
图5为本发明实施例三提供的一种在MME重启，下行数据触发的寻呼过程中智能寻呼方法的流程示意图；
图6为本发明实施例三提供的一种在MME重启，下行承载建立消息触发的寻呼过程中智能寻呼方法的流程示意图；
图7为本发明实施例三提供的一种在MME重启，下行承载更新消息触发的寻呼过程中智能寻呼方法的流程示意图；
图8为本发明实施例四提供的一种服务网关的结构示意图；
图9为本发明实施例四提供的一种移动管理实体的结构示意图；
图10为本发明实施例四提供的一种智能寻呼系统的结构示意图。
具体实施方式
下面通过具体实施方式结合附图对本发明作进一步详细说明。
实施例一：
考虑到现有技术中MME重启后MME需全网寻呼用户导致的无效寻呼范围大、无线资源浪费、寻呼时延长和用户体验差的技术问题，本实施例提供了一种智能寻呼方法，应用于服务网关侧，如图2所示，包括如下步骤：
步骤201：当终端接入的基站发生改变时，服务网关接收所述终端新接入的基站的标识，并记录基站标识，所述基站标识包括：所述终端新接入的基站的标识。
本步骤中终端接入的基站发生改变指的是：终端当前接入的基站与之前接入的基站不同，本步骤中检测终端接入的基站发生改变的主体可以为移动管理实体，也可以为其他网元。
优先地，本步骤还可以记录所述终端之前接入的基站的标识，此时所述基站标识可以包括：终端新接入和之前接入的基站的标识。
本步骤中服务网关可以以列表的形式记录终端之前接入的基站的标识，此时基站标识可以包括：终端新接入的基站的标识、和之前接入的基站标识列表。
步骤202：当移动管理实体重启、或者所述移动管理实体与所述服务网关之间的链路中断时，所述服务网关将所述基站标识发送给所述移动管理实体，以供所述移动管理实体根据所述基站标识向对应的基站发送寻呼消息。
本步骤中检测所述移动管理实体重启或者链路中断的主体可以为：服务网关或者其他网元。本步骤中当基站标识包括终端新接入的基站的标识 时，可供移动管理实体在最近一次终端接入的基站下寻呼用户；当基站标识包括口：终端新接入和之前接入的基站的标识时，可供移动管理实体在最近一次和之前(例如上一次)接入的基站下寻呼用户。
本步骤在MME重启或者MME与服务网关之间的链路中断时，服务网关(Serving GW)可以将终端新接入的基站的标识发送给MME，此时MME可以在最近一次终端接入的基站下寻呼用户；优选地，服务网关还可以将新接入和之前接入的基站的标识发送给MME，此时MME可以在终端之前接入和新接入的基站下寻呼用户，此时MME可以在最近一次终端接入和之前接入的基站下寻呼用户，避免了MM需要进行全网寻呼。
优先地，本步骤中所述服务网关通过下行数据到达消息将基站标识发送给所述移动管理实体。即，通过下行数据到达消息携带基站标识。
本实施例的方法可以使得在MME重启时根据基站标识在对应的基站下寻呼用户，不需要全网寻呼用户，与现有技术相比，本实施例的智能寻呼方法可以在不降低寻呼成功率的情况下，减小寻呼范围，降低寻呼负荷，减少无线资源浪费，减少了MME重启，下行业务恢复的寻呼时延，提升了用户体验。
本实施例方法中，当移动管理实体重启、或者所述移动管理实体与所述服务网关之间的链路中断时，在所述服务网关将基站标识发送给所述移动管理实体之前还包括：所述服务网关接收分组数据网网关发送的寻呼触发消息。
本实施例方法仅仅在接收到寻呼触发消息之后，才将基站标识发送给MME以供MME寻呼用户。
优先地，本实施例方法中所述寻呼触发消息可以包括：所述终端的下行数据、所述终端的下行承载建立消息或者所述终端的下行承载更新消息。
优先地，本实施例方法可以应用在SAE架构中。
实施例二：
本实施例提供了一种智能寻呼方法，应用于移动管理实体侧，如图3所示，包括如下步骤：
步骤301：当终端接入的基站发生改变时，移动管理实体将所述终端新接入的基站的标识发送给服务网关。
本步骤中可以由移动管理实体检测终端接入的基站是否发生改变。
本步骤中移动管理实体可以在检测到终端接入的基站发生改变时，获取新接入的基站的标识，然后发送给服务网关，以供服务网关记录。
步骤302：当移动管理实体重启、或者所述移动管理实体与所述服务网关之间的链路中断时，所述移动管理实体接收所述服务网关发送的基站标识，所述基站标识包括：所述终端新接入的基站的标识。
本步骤中可以由服务网关检测MME是否重启或者MME与服务网关之间的链路是否中断。在检测到MME重启或链路中断后，MME接收到服务网发送的基站标识，然后根据基站标识在对应的基站下寻呼用户。
优先地，本步骤中的基站标识还可以包括：终端之前接入的基站的标识；此时MME接收到基站标识包括：终端之前接入和新接入的基站的标识。
步骤303：所述移动管理实体根据所述基站标识向对应的基站发送寻呼消息。
本实施例方法介绍的是为实施例一方法相对侧的过程，本实施例的智能寻呼方法可以使得MME根据基站标识在对应基站下寻呼用户，例如最近一次终端接入的基站下寻呼，或者在最近一次和之前接入的基站下寻呼；避免了MME全网寻呼用户，与现有技术相比，本实施例的智能寻呼方法可以在不降低寻呼成功率的情况下，减小寻呼范围，降低寻呼负荷，减少无线资源浪费，减少了MME重启，下行业务恢复的寻呼时延，提升了用户体 验。
优先地，本实施例方法中所述移动管理实体通过修改承载请求消息将所述终端新接入的基站的标识发送给服务网关，即通过修改承载请求消息携带终端新接入的基站的标识，然后发送给服务网关。
优先地，本实施例方法可以应用在SAE架构中。
实施例三：
本实施例提供了一种智能寻呼方法，应用于服务网关侧和移动管理实体侧，如图4所示，包括如下步骤：
步骤401：当检测到终端接入的基站发生改变时，移动管理实体将所述终端新接入的基站的标识发送给服务网关。
步骤402：所述服务网关接收所述终端新接入的基站的标识，并记录基站标识，所述基站标识包括：所述终端新接入的基站的标识。
步骤403：当移动管理实体重启、或者所述移动管理实体与所述服务网关之间的链路中断时，所述服务网关将所述基站标识发送给所述移动管理实体。
步骤404：所述移动管理实体根据所述基站标识向对应的基站发送寻呼消息。
采用本发明的智能寻呼方法，在MME重启或者MME与服务网关之间的链路中断时，MME可以在最新一次接入的基站下寻呼用户，避免了全网寻呼用户；与现有技术相比，可以在不降低寻呼成功率的情况下，缩小寻呼范围，降低寻呼负荷，减少无线资源浪费，减少了MME重启，下行业务恢复的寻呼时延，提升了用户感受。
优先地，本实施例中基站标识可以包括：终端新接入和之前接入的基站的标识；此时，采用本发明的智能寻呼方法，在MME重启或者MME与服 务网关之间的链路中断时，MME可以在最新一次接入和之前接入的基站下寻呼用户，避免了全网寻呼用户；与现有技术相比，可以在不降低寻呼成功率的情况下，缩小寻呼范围，降低寻呼负荷，减少无线资源浪费，减少了MME重启，下行业务恢复的寻呼时延，提升了用户感受；且保证了寻呼成功率。
优先地，本实施例智能寻呼方法还需要服务网关接收到寻呼触发消息之后，才可以触发MME寻呼流程；具体地，本实施例方法中在检测到所述移动管理实体重启或者链路中断之后，所述服务网关将基站标识发送给所述移动管理实体之前还包括：所述服务网关接收分组数据网网关发送的寻呼触发消息。
优先地，所述寻呼触发消息包括：所述终端的下行数据、所述终端的下行承载建立消息或者所述终端的下行承载更新消息。
下面介绍在不同应用场景中本实施智能寻呼方法包括的具体过程，以下场景中新的eNodeB标识为终端新接入的eNodeB的标识，UE之前接入eNodeB标识列表为以列表形式记录的终端之前接入的eNodeB的标识。
如图5所示，在MME重启，下行数据触发的寻呼过程，本实施例智能寻呼方法包括如下步骤：
步骤501，用户发起附着消息或跟踪区更新消息至网络；
步骤502，移动管理实体检测到eNodeB改变；
步骤503，移动管理实体向服务网关发送修改承载请求消息，消息中包括新的eNodeB标识；
步骤504，服务网关记录新的eNodeB标识，及可选的UE之前接入eNodeB标识列表；
本步骤包括两种情况，一种是服务网关仅记录新的eNodeB标识，另一种是服务网关记录新的eNodeB标识和UE之前接入eNodeB标识列表。
步骤505，服务网关向移动管理实体发送修改承载响应消息；
步骤506，进行附着或跟踪区更新的其他流程处理；
步骤507，服务网关检测到移动管理实体重启或链路中断；本步骤中链路中断为MME与服务网关之间的链路终端；
步骤508，服务网关从分组数据网网关收到该用户的下行数据；
步骤509，服务网关向移动管理实体发送下行数据到达消息，消息中包括eNodeB标识和/或eNodeB标识列表；
步骤510，移动管理实体向服务网关发送下行数据到达应答消息；
步骤511，移动管理实体根据eNodeB标识和/或eNodeB标识列表向对应的eNodeB发送寻呼消息；
步骤512，基站向用户发送寻呼消息；
步骤513，用户重新附着至网络。
如图6所示，在MME重启，下行承载建立消息触发的寻呼过程，本实施例智能寻呼方法包括如下步骤：
步骤601，用户发起附着消息或跟踪区更新消息至网络；
步骤602，移动管理实体检测到eNodeB改变；
步骤603，移动管理实体向服务网关发送修改承载请求消息，消息中包括新的eNodeB标识；
步骤604，服务网关记录新的eNodeB标识，及可选的UE之前接入eNodeB标识列表；
步骤605，服务网关向移动管理实体发送修改承载响应消息；
步骤606，进行附着或跟踪区更新的其他流程处理；
步骤607，服务网关检测到移动管理实体重启或链路中断；本步骤中链路中断为MME与服务网关之间的链路终端；
步骤608，服务网关从分组数据网网关收到该用户的承载建立请求消 息；
步骤609，服务网关向移动管理实体发送下行数据到达消息，消息中包括eNodeB标识和/或eNodeB标识列表；
步骤610，移动管理实体向服务网关发送下行数据到达应答消息；
步骤611，移动管理实体根据eNodeB标识和/或eNodeB标识列表向对应的eNodeB发送寻呼消息；
步骤612，基站向用户发送寻呼消息；
步骤613，用户重新附着至网络。
如图7所示，本在MME重启，下行承载更新消息触发的寻呼过程中，本实施例智能寻呼方法包括如下步骤：
步骤701，用户发起附着消息或跟踪区更新消息至网络；
步骤702，移动管理实体检测到eNodeB改变；
步骤703，移动管理实体向服务网关发送修改承载请求消息，消息中包括新的eNodeB标识；
步骤704，服务网关记录新的eNodeB标识，及可选的UE之前接入eNodeB标识列表；
步骤705，服务网关向移动管理实体发送修改承载响应消息；
步骤706，进行附着或跟踪区更新的其他流程处理；
步骤707，服务网关检测到移动管理实体重启或链路中断；本步骤中链路中断为MME与服务网关之间的链路终端；
步骤708，服务网关从分组数据网网关收到该用户的承载更新请求消息；
步骤709，服务网关向移动管理实体发送下行数据到达消息，消息中包括eNodeB标识和/或eNodeB标识列表；
步骤710，移动管理实体向服务网关发送下行数据到达应答消息；
步骤711，移动管理实体根据eNodeB标识和/或eNodeB标识列表向对应的eNodeB发送寻呼消息；
步骤712，基站向用户发送寻呼消息；
步骤713，用户重新附着至网络。
实施例四：
本实施例提供了一种服务网关，如图8所示，包括：记录模块和发送模块；
所述记录模块，用于当终端接入的基站发生改变时，接收所述终端新接入的基站的标识，并记录基站标识，所述基站标识包括：所述终端新接入的基站的标识；
所述发送模块，用于当移动管理实体重启、或者所述移动管理实体与所述服务网关之间的链路中断时，将所述基站标识发送给所述移动管理实体，以供所述移动管理实体根据所述基站标识向对应的基站发送寻呼消息。
本实施例的服务网关可以使得MME在重启之后根据基站标识在对应的基站下寻呼用户，不需要全网寻呼用户，与现有技术相比，本实施例的服务网关可以在不降低寻呼成功率的情况下，减小寻呼范围，降低寻呼负荷，减少无线资源浪费，减少了MME重启，下行业务恢复的寻呼时延，提升了用户体验。
本实施例还提供了一种移动管理实体，如图9所示，包括：发送模块、接收模块和寻呼模块；
所述发送模块，用于当终端接入的基站发生改变时，将所述终端新接入的基站的标识发送给服务网关；
所述接收模块，用于当所述移动管理实体重启、或者所述移动管理实体与所述服务网关之间的链路中断时，接收所述服务网关发送的基站标识， 所述基站标识包括：所述终端新接入的基站的标识；
所述寻呼模块，用于根据所述基站标识向对应的基站发送寻呼消息。
本实施例提供的移动管理实体可以使得MME根据基站标识在对应基站下寻呼用户，避免了MME全网寻呼用户，与现有技术相比，本实施例的智能寻呼方法可以在不降低寻呼成功率的情况下，减小寻呼范围，降低寻呼负荷，减少无线资源浪费，减少了MME重启，下行业务恢复的寻呼时延，提升了用户体验。
如图10所示，本实施例还提供了一种智能寻呼系统，包括如上所述的服务网关和移动管理实体；该系统工作过程包括：
当终端接入的基站发生改变时，所述移动管理实体将所述终端新接入的基站的标识发送给服务网关；
所述服务网关接收所述终端新接入的基站的标识，并记录基站标识，所述基站标识包括：所述终端新接入的基站的标识；
当所述移动管理实体重启、或者移动管理实体与服务网关之间的链路中断时，所述服务网关将所述基站标识发送给所述移动管理实体；
所述移动管理实体根据所述基站标识向对应的基站发送寻呼消息。
以上内容是结合具体的实施方式对本发明所作的进一步详细说明，不能认定本发明的具体实施只局限于这些说明。对于本发明所属技术领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干简单推演或替换，都应当视为属于本发明的保护范围。
在本申请所提供的几个实施例中，应该理解到，所揭露的设备和方法，可以通过其它的方式实现。以上所描述的设备实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，如：多个单元或组件可以结合，或可以集成到另 一个系统，或一些特征可以忽略，或不执行。另外，所显示或讨论的各组成部分相互之间的耦合、或直接耦合、或通信连接可以是通过一些接口，设备或单元的间接耦合或通信连接，可以是电性的、机械的或其它形式的。
上述作为分离部件说明的单元可以是、或也可以不是物理上分开的，作为单元显示的部件可以是、或也可以不是物理单元，即可以位于一个地方，也可以分布到多个网络单元上；可以根据实际的需要选择其中的部分或全部单元来实现本实施例方案的目的。
另外，在本发明各实施例中的各功能单元可以全部集成在一个处理模块中，也可以是各单元分别单独作为一个单元，也可以两个或两个以上单元集成在一个单元中；上述集成的单元既可以采用硬件的形式实现，也可以采用硬件加软件功能单元的形式实现。
本领域普通技术人员可以理解：实现上述方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成，前述的程序可以存储于一计算机可读取存储介质中，该程序在执行时，执行包括上述方法实施例的步骤；而前述的存储介质包括：移动存储设备、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以所述权利要求的保护范围为准。

Claims (13)

  1. 一种智能寻呼方法，所述方法包括：
    当终端接入的基站发生改变时，服务网关接收所述终端新接入的基站的标识，并记录基站标识，所述基站标识包括：所述终端新接入的基站的标识；
    当移动管理实体重启、或者所述移动管理实体与所述服务网关之间的链路中断时，所述服务网关将所述基站标识发送给所述移动管理实体，以供所述移动管理实体根据所述基站标识向对应的基站发送寻呼消息。
  2. 如权利要求1所述的智能寻呼方法，其中，所述基站标识还包括：终端之前接入的基站的标识。
  3. 如权利要求1或2所述的方法，其中，所述服务网关将基站标识发送给所述移动管理实体的步骤包括：
    所述服务网关通过下行数据到达消息将基站标识发送给所述移动管理实体。
  4. 如权利要求3所述的方法，其中，当移动管理实体重启、或者所述移动管理实体与所述服务网关之间的链路中断时，在所述服务网关将基站标识发送给所述移动管理实体之前，所述方法还包括：
    所述服务网关接收分组数据网网关发送的寻呼触发消息。
  5. 如权利要求4所述的方法，其中，所述寻呼触发消息包括：
    所述终端的下行数据、所述终端的下行承载建立消息或者所述终端的下行承载更新消息。
  6. 一种智能寻呼方法，所述方法包括：
    当终端接入的基站发生改变时，移动管理实体将所述终端新接入的基站的标识发送给服务网关；
    当所述移动管理实体重启、或者所述移动管理实体与所述服务网关之 间的链路中断时，所述移动管理实体接收所述服务网关发送的基站标识，所述基站标识包括：所述终端新接入的基站的标识；
    所述移动管理实体根据所述基站标识向对应的基站发送寻呼消息。
  7. 如权利要求6所述的智能寻呼方法，其中，所述基站标识还包括终端之前接入的基站的标识。
  8. 如权利要求6或7所述的智能寻呼方法，其中，所述移动管理实体将所述终端新接入的基站的标识发送给服务网关包括：
    所述移动管理实体通过修改承载请求消息将所述终端新接入的基站的标识发送给服务网关。
  9. 一种智能寻呼方法，所述方法包括：
    当终端接入的基站发生改变时，所述移动管理实体将所述终端新接入的基站的标识发送给服务网关；
    所述服务网关接收所述终端新接入的基站的标识，并记录基站标识，所述基站标识包括：所述终端新接入的基站的标识；
    当移动管理实体重启、或者所述移动管理实体与所述服务网关之间的链路中断时，所述服务网关将基站标识发送给所述移动管理实体；
    所述移动管理实体根据所述基站标识向对应的基站发送寻呼消息。
  10. 如权利要求9所述的智能寻呼方法，其中，所述基站标识还包括：终端之前接入的基站的标识。
  11. 一种服务网关，包括：记录模块和发送模块；
    所述记录模块，配置为当终端接入的基站发生改变时，接收所述终端新接入的基站的标识，并记录基站标识，所述基站标识包括：所述终端新接入的基站的标识；
    所述发送模块，配置为当移动管理实体重启、或者所述移动管理实体与所述服务网关之间的链路中断时，将所述基站标识发送给所述移动管理 实体，以供所述移动管理实体根据所述基站标识向对应的基站发送寻呼消息。
  12. 一种移动管理实体，包括：发送模块、接收模块和寻呼模块；
    所述发送模块，配置为当终端接入的基站发生改变时，将所述终端新接入的基站的标识发送给服务网关；
    所述接收模块，配置为当所述移动管理实体重启、或者所述移动管理实体与所述服务网关之间的链路中断时，接收所述服务网关发送的基站标识，所述基站标识包括：所述终端新接入的基站的标识；
    所述寻呼模块，配置为根据所述基站标识向对应的基站发送寻呼消息。
  13. 一种智能寻呼系统，包括：如权利要求11所述的服务网关和如权利要求12所述的移动管理实体。
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