WO2011116603A1 - 对mtc设备进行分组管理的方法及系统 - Google Patents

对mtc设备进行分组管理的方法及系统 Download PDF

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Publication number
WO2011116603A1
WO2011116603A1 PCT/CN2010/078068 CN2010078068W WO2011116603A1 WO 2011116603 A1 WO2011116603 A1 WO 2011116603A1 CN 2010078068 W CN2010078068 W CN 2010078068W WO 2011116603 A1 WO2011116603 A1 WO 2011116603A1
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Prior art keywords
mtc
group
new
information
devices
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PCT/CN2010/078068
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English (en)
French (fr)
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吴昊
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中兴通讯股份有限公司
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Publication of WO2011116603A1 publication Critical patent/WO2011116603A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H04W4/08—User group management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/18—Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
    • H04W8/186—Processing of subscriber group data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information

Definitions

  • the present invention relates to a machine type communication (MTC) technology, and in particular, to a method and system for group management of an MTC device.
  • MTC machine type communication
  • FIG. 1 is a schematic structural diagram of a conventional cellular wireless communication system.
  • a cellular wireless communication system is mainly composed of a core network (CN, Core Network), an access network (RAN, Radio Access Network), and a terminal.
  • the core network is responsible for non-access stratum transactions, such as terminal location update, and the core network is an anchor point of the user plane;
  • the access network is responsible for access layer transactions, such as management of radio resources, and the access network includes a base station, or a base station.
  • the base station controller the base station may have a physical or logical connection according to the actual situation, such as the connection between the base station 1 and the base station 2, the base station 1 and the base station 3 in FIG. 1, and each base station may have more than one
  • the core network node is connected;
  • the terminal is a user equipment (UE, User Equipment), which refers to various devices that can communicate with the cellular wireless communication network, such as a mobile phone or a notebook computer.
  • UE user equipment
  • the MTC service refers to the communication between machines. In the MTC service, no human participation is required, and all communication is performed by the machine.
  • the MTC service obtains data through sensing devices such as sensors, and then reports the data to the mobile communication network through the communication module, and accesses the public data network through the mobile communication network, for example, in logistics monitoring, security monitoring, telemedicine detection, remote meter reading, etc. application.
  • This data is managed by a mobile operator or a specific MTC operator's specific MTC server and can be viewed by MTC users or MTC managers. In this process, the device that obtains the data required by the business is the MTC device.
  • the MTC service is different from the traditional mobile communication service.
  • MTC Mobility Management Entity
  • MME Mobility Management Entity
  • HSS Home Subscriber Server
  • the HSS is an entity in the telecommunication network for storing identity information, authentication information, authorization information, and the like of a user or a terminal device.
  • the HSS can be used to store the identity information of the user and the binding information of the user and the terminal device, or only the identity information of the user (the binding information of the user and the terminal device can be saved by the gateway), or the identity of the terminal device can be directly saved. information.
  • the HSS is also responsible for the user's subscription database, as well as the user's authentication and authorization.
  • the service platform can query user or terminal information from the HSS.
  • the MME is an entity for managing user terminal control signaling in the core network, and is responsible for access control, including: authentication control, identity (GUTI, TAI list) assignment, user identification and device identification verification, signaling plane encryption, and Consistency protection between evolved base stations (eNBs, evolved Node Bs), second generation (2G, Second Generation) / third generation (3G, 3rd-Generation) mobile communication technologies and Evolved Packet System (EPS) Inter-connection security parameters and quality of service (QoS) parameters, access permission control, decision whether to obtain the requested resources and reserve these resources, lawful interception, mobility management, such as tracking the current location of the UE And recording, session management, related operations on EPS bearers, network element selection, selection of Serving Gateway (S-GW) and Packet Data Network Gateway (P-GW), and target MME/S4 GPRS service support node when switching ( SGSN, Servicing GPRS Support Node), etc.
  • the mobility management of these MTC logistics monitoring devices has the same signaling and If this type of MTC device is still managed according to the existing grouping method, the network signaling load and management flow will be increased, resulting in network congestion.
  • the main object of the present invention is to provide a method and system for group management of an MTC device, which can reduce network signaling load and management flow, and avoid network congestion.
  • a method for group management of an MTC device comprising:
  • the merging the MTC devices with the common characteristics into the new MTC group includes: the MME merges the MTC devices with the common characteristics into one new MTC group, and allocates the new MTC group to the new MTC group.
  • the group information of the new MTC group is associated with the group information of the group to which each MTC device belongs, and is stored locally in the MME.
  • the method further includes: associating the group information of the group to which the new MTC device belongs with the group information of the new MTC group for the new MTC device having the common characteristics of the MTC devices in the new MTC group , making the new MTC device a member of the group of the new MTC group.
  • the method further includes: deleting, for the MTC device in the new MTC group, the group information of the group to which the MTC device belongs, from the new MTC group, if the common feature of the new group is no longer available.
  • the common characteristics are: MTC devices belonging to different MTC groups have the same MTC characteristics; or
  • MTC devices belonging to different MTC groups are in the same location; or,
  • MTC devices belonging to different MTC groups have the same mobility.
  • the MTC characteristic is a time control characteristic or a time tolerance characteristic.
  • the present invention also provides a system for group management of an MTC device, including at least an MME and an HSS, where
  • the MME is configured to acquire group information of a group to which the different MTC devices belong from the HSS, and merge the MTC devices having the common characteristics in the characteristics of the group information into the new MTC group;
  • the HSS is used to store group information of groups to which different MTC devices belong and provide them to the MME.
  • the MME is further configured to associate group information of a group to which the MTC device belongs and group information of the new MTC group when detecting an MTC device having a common characteristic of the MTC device in the new MTC group. .
  • the MME is further configured to: when detecting an MTC device that does not have the common feature of the new MTC group in the new MTC group, cancel group information of the group to which the MTC device belongs and the new MTC group. The association of the group information.
  • the method of the present invention includes acquiring group information of a group to which the MTC device belongs, and merging the MTC devices having the common characteristics among the characteristics of the group information into the new MTC group.
  • MTC devices with common characteristics are formed into a new MTC group, and such MTC devices with common characteristics are managed, so that network signaling load and management flow can be alleviated, thereby avoiding network congestion.
  • FIG. 1 is a schematic structural diagram of a conventional cellular wireless communication system
  • FIG. 2 is a flowchart of a method for group management of an MTC device according to the present invention
  • FIG. 3 is a schematic structural diagram of a system for group management of an MTC device according to the present invention
  • FIG. 4 is a flowchart of an embodiment of group management for an MTC device according to the present invention. detailed description
  • Step 200 Obtain group information of a group to which the MTC device belongs.
  • the MME obtains group information of a group to which the different MTC devices belong from the HSS, where the group information includes a group identifier, and/or a group member identifier, and/or a group property.
  • Step 201 Merge the MTC devices having the common characteristics in the characteristics of the group information into the new MTC group.
  • MTC devices having common characteristics may belong to different groups or may belong to the same group.
  • the MME merges the MTC devices with the common characteristics into a new MTC group, and at the same time, assigns a new MTC group identifier, and associates the group information of the new MTC group with the group information of each group to which the MTC device belongs.
  • the new MTC group in this step may be a temporary MTC group or a formal MTC group. If the new MTC group is a temporary MTC group, the new group identifier is a temporary group identifier, and the temporary MTC group.
  • the group information of the group is associated with the group information of the group to which the MTC device belongs, and is only stored locally in the MME.
  • the MME determines that it is unnecessary to perform unified mobility management on the MTC device in the newly created MTC group, for example, the goods are delivered to the destination. After that, the MME can delete the temporary group by itself; if the new MTC group is a formal MTC group, then the relevant information needs to be recorded in the HSS as the existing MTC group, and its operation is consistent with the existing MTC group, and here no longer Narration.
  • MTC devices belonging to different MTC groups have the same MTC characteristics.
  • MTC devices have time control characteristics, that is, MTC devices transmit and receive data at preset fixed times; or, they all have time tolerance characteristics, that is, allow MTC devices to Delay the transmission and reception of data when the network load is large;
  • MTC devices belonging to different MTC groups have the same mobility, such as initiating mobility management requests at the same location and at the same time.
  • the common features described above are merely illustrative and are not intended to limit the scope of the common features.
  • the method of the present invention may further include: for the new MTC device having the common characteristics of the MTC devices in the established temporary MTC group, associating the group information of the group to which the new MTC device belongs with the group information of the temporary MTC group, Making the new MTC device a member of the temporary MTC group;
  • the method of the present invention may further include: if the MTC device in the temporary MTC group no longer has the common characteristics of the temporary group, for example, the MME detects that the MTC device initiates an offline application, or the associated tracking area is not associated with the temporary group.
  • the group information of the group to which the MTC device belongs is deleted from the temporary MTC group, that is, the group information of the group to which the MTC device belongs is associated with the group information of the temporary group.
  • the MTC devices with common characteristics are formed into a new MTC group, and the MTC devices with common characteristics are managed, the network signaling load and the management process are alleviated, thereby avoiding network congestion.
  • FIG. 3 is a schematic structural diagram of a system for group management of an MTC device according to the present invention, as shown in FIG. 3, including at least an MME and an HSS;
  • the MME is configured to acquire group information of a group to which the different MTC devices belong from the HSS, and merge the MTC devices having the common characteristics in the characteristics of the group information into the new MTC group;
  • the HSS is used to store group information of groups to which different MTC devices belong and provide them to the MME.
  • the MME in the system is further configured to associate the group information of the group to which the MTC device belongs and the group information of the new MTC group when detecting the MTC device having the common characteristics of the MTC device in the new MTC group.
  • the MME in the system is further configured to cancel the group information of the group to which the MTC device belongs and the group of the new MTC group when detecting the MTC device that exists in the new MTC group and no longer has the common feature of the new MTC group.
  • the association of information The method of the present invention will be described in detail below with reference to the embodiments.
  • FIG. 4 is a flowchart of an embodiment of group management of an MTC device according to the present invention.
  • MTC users need to monitor goods carried in a container, and in order to comply with the requirements of the network operator, avoid a large number of devices.
  • the network congestion caused by the network is signed with the network operator to manage the mobility of the respective MTC devices.
  • the network operator saves the MTC device subscription information specified by the MTC users in the HSS, and records the network in the HSS.
  • the specific recording mode may be: indexing the identifier of a single MTC device, and adding the group identifier and/or group characteristics to which the MTC device belongs in the corresponding information. As shown in Figure 4, the following steps are specifically included:
  • Step 400 After the MTC device is powered on, send an attach request to the network.
  • Step 401 After receiving the attach request of the MTC device, the MME obtains the information of the MTC device from the HSS, including the security certificate, the quality of service parameter, the MTC subscription data, and the like, and performs authentication on the MTC device according to the information. Then, the connection accepting request signaling is sent to the MTC device.
  • Steps 402 to 403 The MME determines, according to the tracking area of the MTC device and the moment when the mobility management process occurs, whether the MTC device of different groups initiates the handover request or the tracking area update request at the same location and time. For different groups of MTC devices that initiate a handover request or tracking area update request at the same location and time, a new group is created and the new group is assigned a temporary group identity.
  • the MME can know the location of the MTC device in the accuracy of the tracking area.
  • the MTC device performs tracking area update or handover during the mobile process, and needs to send signaling to the MME, and the MME controls its mobility management process.
  • the temporary group identification means that the group information is not recorded in the contract information in the HSS. Recorded, only stored in the MME. Then, the MTC groups that need to be combined are associated with the temporary group identifier, that is, the corresponding individual MTC groups and their corresponding group information can be retrieved by the temporary group identifier.
  • Step 404 When the MTC device in the new temporary group initiates the handover or the tracking area update request, the MME includes the information included in the temporary group according to the information associated with the temporary group identifier. All MTC devices interact with the target MME through a single MME control signaling, such as a single handover request signaling, handover response signaling, and MTC device context forwarding signaling. This reduces network signaling overhead and avoids network congestion caused by a large number of MTC groups.
  • a single MME control signaling such as a single handover request signaling, handover response signaling, and MTC device context forwarding signaling. This reduces network signaling overhead and avoids network congestion caused by a large number of MTC groups.
  • the MME creates a new group, it further includes step 405: if it is detected that a new MTC device meets the common characteristics of the temporary group, associate the MTC device identifier with the temporary group identifier to become a group member of the temporary group. If the MME detects that an MTC device initiates an offline application in the temporary group, or if the belonging tracking area is not within the tracking area list associated with the temporary group, the MTC device identifier and related information are deleted from the temporary group.

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Description

对 MTC设备进行分组管理的方法及系统 技术领域
本发明涉及机器类型通信 ( MTC, Machine Type Communication )技术， 尤其涉及一种对 MTC设备进行分组管理的方法及系统。 背景技术
图 1为现有蜂窝无线通信系统的架构示意图， 如图 1所示， 蜂窝无线 通信系统主要由核心网（CN, Core Network )、接入网（RAN, Radio Access Network )和终端组成。 其中， 核心网负责非接入层事务， 比如终端位置更 新等， 核心网是用户面的锚点； 接入网负责接入层事务， 比如无线资源的 管理等， 接入网包括基站， 或者基站以及基站控制器， 基站之间可以根据 实际情况存在物理或逻辑上的连接， 如图 1中的基站 1和基站 2,基站 1和 基站 3之间的连接， 并且每个基站可以和一个以上的核心网节点连接； 终 端即是用户设备（UE, User Equipment ), 是指可以和蜂窝无线通信网络通 信的各种设备， 比如移动电话或笔记本电脑等。
MTC业务是指机器之间进行通信的业务， 在 MTC业务中不需要人的 参与， 所有的通信由机器自主完成。 MTC业务通过传感器等感知设备获得 数据， 然后通过通信模块将数据上报给移动通信网络， 并通过移动通信网 络接入到公共数据网， 例如在物流监控、 安全监测、 远程医疗检测、 远程 抄表等应用。 该数据由移动运营商或专门的 MTC运营商的特定 MTC服务 器进行管理， 可供 MTC用户或 MTC管理者查看。 在这个过程中， 获取业 务所需要的数据的设备即为 MTC设备。
MTC业务与传统移动通信业务有所不同， 对于一个 MTC用户， 可能 拥有多个 MTC设备， 比如在远程抄表业务中， 可能数千个作为 MTC设备 的远程电表都属于某电力公司这个 MTC用户，为了方便对这些属于同一个 MTC用户的远程电表进行管理， 对更多的远程电表进行了分组， 以减少控 制信令、 以及方便管理和计费。 目前， 为了方便对组进行管理， 属于同一 个 MTC用户的 MTC设备被划分到同一个组， 并且相关组信息在归属用户 服务器（ HSS, Home Subscriber Server )中保存。 在 MTC业务执行过程中， 由移动性管理实体（MME, Mobility Management Entity )从 HSS 中获取 MTC设备的分组信息， 并根据分组信息对 MTC设备进行管理。
这里， HSS 是电信网络中用于保存用户或终端设备的身份信息、 认证 信息和授权信息等的实体。 根据不同情况， HSS 可用于保存用户的身份信 息及用户和终端设备的绑定信息， 或只保存用户的身份信息 （可由网关保 存用户和终端设备的绑定信息）， 或直接保存终端设备的身份信息。 HSS还 负责用户的签约数据库、 以及执行用户的身份验证和授权等。 业务平台可 从 HSS查询用户或终端信息。 MME是核心网中用于管理用户终端控制信 令的实体， 负责接入控制， 包括： 鉴权控制、 标识（GUTI, TAI list )指配、 用户标识和设备标识验证、 信令面加密、 与演进基站（eNB, evolved Node B )之间的一致性保护、 第二代（2G, Second Generation ) /第三代（3G, 3rd-Generation )移动通信技术与演进分组系统（ EPS , Evolved Packet System ) 之间安全参数以及服务质量（QoS, Quality of Service )参数的转换、 接入 许可控制、 决定是否可以获得请求的资源并预留这些资源、 合法监听、 移 动性管理如实现对 UE当前位置的跟踪和记录、 会话管理、 对 EPS承载的 相关操作、 网元选择、 对服务网关（S-GW )和分组数据网络网关（P-GW ) 的选择、 以及切换时目标 MME/S4 GPRS服务支持节点 （ SGSN, Servicing GPRS Support Node ) 的选择等。
在有些场景下， 例如在一辆移动的集装箱上有多个 MTC用户的 MTC 物流监控设备，这些 MTC物流监控设备的移动性管理具备相同的信令和过 程， 如果还是按照现有分组方法对这种类型的 MTC设备进行管理的话， 将 会增加网络信令负荷和管理流程， 从而导致网络拥塞。 发明内容
有鉴于此，本发明的主要目的在于提供一种对 MTC设备进行分组管理 的方法及系统， 能够降低网络信令负荷和管理流程， 避免网络拥塞的发生。
为达到上述目的， 本发明的技术方案是这样实现的：
一种对 MTC设备进行分组管理的方法， 该方法包括：
获取 MTC设备所属组的组信息；
将组信息的特性中具有共同特性的 MTC设备合并到新 MTC组中。 上述方案中， 所述将具有共同特性的 MTC设备合并到新 MTC组中， 包括： MME将具有共同特性的 MTC设备合并到一个新的 MTC组中， 同 时为所述新 MTC组分配新 MTC组标识， 并分别将所述新 MTC组的组信 息与各 MTC设备所属组的组信息关联后存储在 MME本地。
上述方案中， 该方法进一步包括： 对于具有所述新 MTC组中的 MTC 设备的共同特性的新的 MTC设备， 将该新的 MTC设备所属组的组信息与 所述新 MTC组的组信息关联， 使该新的 MTC设备成为所述新 MTC组的 组成员。
上述方案中，该方法进一步包括： 对于所述新 MTC组中的 MTC设备， 如果不再具有该新组的共同特性，则将该 MTC设备所属组的组信息从所述 新 MTC组中删除。
上述方案中， 所述具有共同特性为： 属于不同 MTC组的 MTC设备具 有相同的 MTC特性； 或者，
属于不同 MTC组的 MTC设备处于相同的位置； 或者，
属于不同 MTC组的 MTC设备具备相同的移动性。
上述方案中， 所述 MTC特性为时间控制特性， 或时间容忍特性。 本发明还提供了一种对 MTC 设备进行分组管理的系统， 至少包括 MME和 HSS, 其中，
MME, 用于从 HSS获取不同 MTC设备所属组的组信息， 并将组信息 的特性中具有共同特性的 MTC设备合并到新 MTC组中；
HSS, 用于存储不同 MTC设备所属组的组信息， 并提供给 MME。 上述方案中， 所述 MME, 还用于在检测到具有所述新 MTC 组中的 MTC设备的共同特性的 MTC设备时，关联该 MTC设备所属组的组信息与 所述新 MTC组的组信息。
上述方案中， 所述 MME, 还用于在检测到所述新 MTC组中的不具有 该新 MTC组的共同特性的 MTC设备时， 取消该 MTC设备所属组的组信 息与所述新 MTC组的组信息的关联。
从上述本发明提供的技术方案可以看出，本发明方法包括获取 MTC设 备所属组的组信息，将组信息的特性中具有共同特性的 MTC设备合并到新 MTC组中。通过本发明方法，将具有共同特性的 MTC设备组成新 MTC组， 并对这种具有共同特性的 MTC设备进行管理， 如此， 能减轻网络信令负荷 和管理流程， 进而能避免网络拥塞的发生。 附图说明
图 1为现有蜂窝无线通信系统的架构示意图；
图 2为本发明对 MTC设备进行分组管理的方法的流程图；
图 3为本发明对 MTC设备进行分组管理的系统组成结构示意图； 图 4为本发明对 MTC设备进行分组管理的实施例的流程图。 具体实施方式
图 2为本发明对 MTC设备进行分组管理的方法的流程图，如图 2所示， 包括以下步骤： 步骤 200: 获取 MTC设备所属组的组信息。
本步骤中， MME从 HSS获得不同 MTC设备所属组的组信息， 其中， 所 述组信息包括组标识、 和 /或组成员标识、 和 /或组特性。
步骤 201： 将组信息的特性中具有共同特性的 MTC设备合并到新 MTC 组中。
这里， 具有共同特性的 MTC设备可以属于不同的组， 也可以属于同一 组。
本步骤中， MME将具有共同特性的 MTC设备合并到一个新 MTC组 中， 同时， 分配一个新 MTC组标识， 并分别将该新 MTC组的组信息与各 MTC设备所属组的组信息关联后存储在 MME本地。 需要说明的是， 本步 骤中的新 MTC组可以是一个临时的 MTC组， 也可以是一个正式的 MTC 组， 如果新 MTC 组是临时 MTC 组， 则新组标识为临时组标识， 该临时 MTC组的组信息与各 MTC设备所属组的组信息关联后仅存储在 MME本 地， 这样， MME判断不需要再对新建的 MTC组中的 MTC设备进行统一 移动性管理时， 比如货物运送到达目的地后， MME可以自行删除这个临时 组； 如果新 MTC组是一个正式的 MTC组， 那么， 需要与现有的 MTC组 一样在 HSS记录相关信息， 对其操作与现有 MTC组一致， 这里不再赘述。
其中， 所述共同特性可以如下：
(1) 属于不同 MTC组的 MTC设备具有相同的 MTC特性， 比如 MTC 设备都具有时间控制特性，即 MTC设备在预设的固定时间收发数据；或者， 都具有时间容忍特性， 即允许 MTC设备在网络负荷较大时延迟其数据发送 和接收等；
(2) 属于不同 MTC组的 MTC设备处于相同的位置；
(3) 属于不同 MTC组的 MTC设备具备相同的移动性， 比如在相同位 置、 相同时间发起移动性管理请求等。 这里， 上面描述的共同特性仅是举例说明， 并不用于限定共同特性的 范围。
本发明方法还可以进一步包括： 对于新的、 具有建立的临时 MTC组中 的 MTC设备的共同特性的 MTC设备， 将该新的 MTC设备所属组的组信 息与该临时 MTC组的组信息关联， 使该新的 MTC设备成为临时 MTC组 的组成员；
本发明方法还可以进一步包括： 对于临时 MTC组中的 MTC设备 , 如 果不再具有该临时组的共同特性， 比如， MME检测到有 MTC设备发起离 线申请， 或者， 所属跟踪区不在与临时组关联的跟踪区列表范围内等等， 那么， 将该 MTC设备所属组的组信息从该临时 MTC组中删除， 即： 取消 该 MTC设备所属组的组信息与该临时组的组信息关联。
通过本发明方法， 将具有共同特性的 MTC设备组成新 MTC组， 并对 这种具有共同特性的 MTC设备进行管理， 减轻了网络信令负荷和管理流 程， 从而避免了网络拥塞的发生。
图 3为本发明对 MTC设备进行分组管理的系统组成结构示意图，如图 3所示 , 至少包括 MME和 HSS; 其中 ,
MME, 用于从 HSS获取不同 MTC设备所属组的组信息， 并将组信息 的特性中具有共同特性的 MTC设备合并到新 MTC组中；
HSS, 用于存储不同 MTC设备所属组的组信息， 并提供给 MME。 本系统中的 MME, 还用于在检测到具有新 MTC组中的 MTC设备的 共同特性的 MTC设备时， 关联该 MTC设备所属组的组信息与该新 MTC 组的组信息。
本系统中的 MME , 还用于在检测到新 MTC组中存在的、 不再具有该 新 MTC组的共同特性的 MTC设备时， 取消该 MTC设备所属组的组信息 与该新 MTC组的组信息的关联。 下面结合实施例对本发明方法进行详细描述。
图 4为本发明对 MTC设备进行分组管理的实施例的流程图，本实施例 中， 假设 MTC用户们需要对集装箱中运载的货物进行监控， 为了符合网络 运营商的要求， 避免大量设备的信令导致的网络拥塞现象， 与网络运营商 签订组管理方式来对各自的 MTC设备进行移动性管理； 并且， 网络运营商 将 MTC用户们指定的 MTC设备签约信息保存在 HSS中， HSS中记录网络 运营商分配的组标识、 每个组包含的组成员的标识、 该组对应的特性。 具 体记录方式可以是： 以单个 MTC设备的标识为索引， 在其后对应的信息中 添加该 MTC设备所属的组标识， 和 /或组特性。 如图 4所示， 具体包括以 下步骤：
步骤 400: MTC设备在开机以后， 向网络发送附着请求。
步骤 401 : 在接收到 MTC设备的附着请求后， MME向 HSS获得该 MTC设备的信息， 包括安全证书、 服务质量参数、 MTC签约数据等， 并根 据这些信息对 MTC设备进行认证， 若通过认证， 则发送接受附着请求信令 给 MTC设备。
步骤 402~ 403: MME根据 MTC设备所属跟踪区和移动性管理过程发生 的时刻， 判断是否有不同组的 MTC设备在相同的位置和时刻发起切换请求 或跟踪区更新请求。 对于在相同的位置和时刻发起切换请求或跟踪区更新 请求的不同组的 MTC设备， 创建一个新组， 并给新组分配临时组标识。
本步骤中， 在 MTC设备附着到网络以后， MME能在跟踪区的精度上 知道 MTC设备的位置。 MTC设备在移动过程中执行跟踪区更新或切换， 都需要发送信令到 MME, 由 MME控制其移动性管理过程。
如果有属于不同组的 MTC设备符合要求，即在相同的位置和时刻发起 切换请求或跟踪区更新请求， 则创建一个新组， 给新组分配一个临时组标 识。 这里， 临时组标识的意思是指该组信息并不在 HSS中的签约信息中记 录， 仅仅存储在 MME中。 然后， 将需要组合在一起的 MTC组关联到该临 时组标识下， 即通过临时组标识可以检索到对应的各个 MTC组 , 以及其相 应的组信息。
进一步地， 在 MME创建临时 MTC组后， 还包括步骤 404: 当新的临 时组中的 MTC设备发起切换或跟踪区更新请求时 , MME根据临时组标识 所关联的信息， 将临时组所包含的所有 MTC设备通过单一的 MME控制信 令与目标 MME交互，例如单一的切换请求信令、切换响应信令、以及 MTC 设备上下文转发信令。 由此可以减少网络信令开销， 避免大量 MTC组导致 的网络拥塞。
进一步地， 如果在 MME创建新组后， 还包括步骤 405: 如果检测到有 新的 MTC设备符合临时组的共同特性时， 将其 MTC设备标识关联到临时 组标识下， 成为临时组的组成员； 如果 MME检测到临时组中有 MTC设备 发起离线申请时， 或者， 所属跟踪区不在与临时组关联的跟踪区列表范围 内， 则该 MTC设备标识及与之相关的信息从临时组中删除。
以上所述， 仅为本发明的较佳实施例而已， 并非用于限定本发明的保 护范围， 凡在本发明的精神和原则之内所作的任何修改、 等同替换和改进 等， 均应包含在本发明的保护范围之内。

Claims

权利要求书
1、 一种对机器类型通信（MTC )设备进行分组管理的方法， 其特征在 于， 该方法包括：
获取 MTC设备所属组的组信息；
将组信息的特性中具有共同特性的 MTC设备合并到新 MTC组中。
2、 根据权利要求 1所述的方法， 其特征在于， 所述将具有共同特性的 MTC设备合并到新 MTC组中 , 包括：
移动性管理实体（MME )将具有共同特性的 MTC设备合并到一个新 的 MTC组中， 同时为所述新 MTC组分配新 MTC组标识， 并分别将所述 新 MTC组的组信息与各 MTC设备所属组的组信息关联后存储在 MME本 地。
3、 根据权利要求 2所述的方法， 其特征在于， 该方法进一步包括： 对于具有所述新 MTC组中 MTC设备的共同特性的新的 MTC设备， 将所述新的 MTC设备所属组的组信息与所述新 MTC组的组信息关联， 使 所述新的 MTC设备成为所述新 MTC组的组成员。
4、 根据权利要求 2所述的方法， 其特征在于， 该方法进一步包括： 对于所述新 MTC组中的 MTC设备， 不再具有所述新 MTC组的共同 特性时， 则将所述 MTC设备所属组的组信息从所述新 MTC组中删除。
5、 根据权利要求 1至 4任一项所述的方法， 其特征在于， 所述具有共 同特性为：
属于不同 MTC组的 MTC设备具有相同的 MTC特性； 或者， 属于不同 MTC组的 MTC设备处于相同的位置； 或者，
属于不同 MTC组的 MTC设备具备相同的移动性。
6、 根据权利要求 5所述的方法， 其特征在于， 所述 MTC特性为时间 控制特性或时间容忍特性。
7、 一种对 MTC设备进行分组管理的系统， 其特征在于， 至少包括移 动性管理实体 MME和归属用户服务器 （HSS ) ， 其中，
MME, 用于从 HSS获取不同 MTC设备所属组的组信息， 并将组信息 的特性中具有共同特性的 MTC设备合并到新 MTC组中；
HSS, 用于存储不同 MTC设备所属组的组信息， 并提供给 MME。
8、 根据权利要求 7所述的系统， 其特征在于， 所述 MME, 还用于在 检测到具有所述新 MTC组中 MTC设备的共同特性的 MTC设备时， 关联 所述 MTC设备所属组的组信息与所述新 MTC组的组信息。
9、 根据权利要求 7所述的系统， 其特征在于， 所述 MME, 还用于在 检测到所述新 MTC组中的不具有所述新 MTC组的共同特性的 MTC设备 时，取消所述 MTC设备所属组的组信息与所述新 MTC组的组信息的关联。
10、 根据权利要求 7至 9任一项所述的系统， 其特征在于， 所述具有 共同特性为：
属于不同 MTC组的 MTC设备具有相同的 MTC特性； 或者， 属于不同 MTC组的 MTC设备处于相同的位置； 或者，
属于不同 MTC组的 MTC设备具备相同的移动性。
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