WO2012109823A1 - 一种机器类型通信设备的拥塞控制方法及系统 - Google Patents

一种机器类型通信设备的拥塞控制方法及系统 Download PDF

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Publication number
WO2012109823A1
WO2012109823A1 PCT/CN2011/073955 CN2011073955W WO2012109823A1 WO 2012109823 A1 WO2012109823 A1 WO 2012109823A1 CN 2011073955 W CN2011073955 W CN 2011073955W WO 2012109823 A1 WO2012109823 A1 WO 2012109823A1
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Prior art keywords
control signaling
terminal
rrc connection
overload control
base station
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PCT/CN2011/073955
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English (en)
French (fr)
Inventor
吴昊
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中兴通讯股份有限公司
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Publication of WO2012109823A1 publication Critical patent/WO2012109823A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/02Traffic management, e.g. flow control or congestion control
    • H04W28/0215Traffic management, e.g. flow control or congestion control based on user or device properties, e.g. MTC-capable devices
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/02Traffic management, e.g. flow control or congestion control
    • H04W28/0289Congestion control
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/02Access restriction performed under specific conditions
    • H04W48/06Access restriction performed under specific conditions based on traffic conditions

Definitions

  • the present invention relates to the field of terminal communications, and in particular, to a congestion control method and system for a Machine Type Communication (MTC) device.
  • MTC Machine Type Communication
  • the cellular wireless communication system is mainly composed of a core network (Core Network, abbreviated as CN), a radio access network (RAN), and a user equipment (User Equipment, UE for short).
  • the core network is responsible for non-access layer transactions, such as terminal location updates, and is the anchor point for the user plane.
  • the access network includes a base station, or a base station and a base station, and the access network is responsible for access layer transactions (for example, management of radio resources).
  • the base stations may have physical or logical connections according to actual conditions, such as the base station 1 in FIG.
  • the connection with the base station 2 and the connection between the base station 1 and the base station 3, and each base station can be connected to one or more core network nodes.
  • a terminal is a device that can communicate with a cellular wireless communication network, such as a mobile phone or a laptop.
  • the MTC service is a service in which machines are communicated between machines. In the MTC service, no human participation is required. All communication is performed by the machine.
  • the MTC service obtains data through a sensor or the like, and then reports the data to the mobile communication network through the communication module, and accesses the public data through the mobile communication network. Net, for example in logistics monitoring, security monitoring, telemedicine testing, remote meter reading and other applications.
  • This data is managed by a mobile operator or a specific server of a dedicated MTC operator and can be viewed by MTC users or MTC managers. In this process, the device that acquires the data required by the service is the MTC device.
  • the MTC service introduces some features that are different from the traditional mobile communication, such as the group management feature.
  • the MTC device of the same user may be divided into a group, and the network can uniformly configure parameters for the entire group.
  • the operator sets and activates the group management feature in the subscription information of the MTC device, and stores it in the Home Subscriber Server (HSS).
  • HSS is an entity in the telecommunication network that is responsible for storing identity information, authentication information, and authorization information of a user or a terminal device.
  • HSS It can be used to save the user's identity information and the binding information of the user and the terminal device, or only save the user's identity information (the gateway can save the binding information of the user and the terminal device), or directly save the identity information of the terminal device.
  • 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.
  • MME User Home Server
  • HSS User Home Server
  • the MME is an entity in the core network for managing user terminal control signaling, and is responsible for access control, including authentication control, identification (such as global unique temporary identification (GUTI) and tracking area identification list (TAI list)), user Identification and device identification verification, signaling plane encryption, consistency protection with evolved base stations (eNBs), security parameters between 2G/3G and Evolved Packet System (EPS), and quality of service (Quality of Service, referred to as QoS) parameter conversion, access permission control, decide whether to obtain the requested resources and reserve these resources, lawful interception, mobility management (to achieve tracking and recording of the current location of the UE), session management, for EPS Related operations of bearers, as well as network element selection.
  • GUI global unique temporary identification
  • TAI list tracking area identification list
  • EPS Evolved Packet System
  • QoS Quality of Service
  • a large number of MTC devices may exist.
  • the core network may be congested due to the excessively large number of signalings initiated at the same time, thereby affecting the core network to process other
  • the service efficiency and quality of the terminals connected to the network for example, the signaling of a large number of new access devices affects the signaling processing speed of the accessed devices.
  • the technical problem to be solved by the present invention is to provide a congestion control method and system for a machine type communication device, which avoids network congestion that may be caused by a large number of MTC devices.
  • the present invention provides a congestion control method for a machine type communication device, including:
  • the mobility management unit sends an overload control signaling to the base station when overloaded;
  • the base station After receiving the overload control signaling, the base station rejects a request for establishing a radio resource control (RRC) connection of the terminal according to the overload control signaling.
  • RRC radio resource control
  • the overload control signaling includes a waiting time; the base station controls according to the overload
  • the signaling rejecting the terminal's request to establish an RRC connection includes: the base station sends a reject message to the terminal requesting to establish an RRC connection, and rejects the request of all terminals to establish an RRC connection.
  • the overload control signaling includes a waiting time and a terminal category that needs to be controlled; and the step of the base station denying the terminal to establish an RRC connection according to the overload control signaling includes: the base station establishing an RRC to the request The terminal connected and belonging to the terminal class indicated in the overload control signaling sends a reject message, rejecting the request for establishing an RRC connection of the terminal belonging to the terminal class.
  • the base station carries a delay time in the reject message, and is used to indicate a time interval between a time when the terminal initiates the next RRC connection request and a time when the RRC connection request is initiated.
  • the value of the delay time is equal to a value of the waiting time in the overload control signaling, or is determined by the base station based on the value of the waiting time.
  • the present invention further provides a congestion control system for a machine type communication device, comprising: a first device located in a mobility management unit (MME), and a second device located at a base station, where:
  • MME mobility management unit
  • the first device is configured to: send an overload control signaling to the base station when the MME is overloaded; the second device is configured to: after receiving the overload control signaling, reject the establishment of the terminal according to the overload control signaling Request for Radio Resource Control (RRC) connection.
  • RRC Radio Resource Control
  • the overload control signaling includes a waiting time; the second device is configured to reject, by using the following manner, a request for establishing an RRC connection of the terminal according to the overload control signaling: sending to a terminal requesting to establish an RRC connection The reject message rejects the request of all terminals to establish an RRC connection.
  • the overload control signaling includes a waiting time and a terminal category that needs to be controlled; and the second device is configured to: in response to the overload control signaling, reject the terminal to establish an RRC connection request according to the overload control signaling Transmitting a reject message to a terminal requesting to establish an RRC connection and belonging to the terminal class indicated in the overload control signaling, rejecting the request of the terminal of the terminal class to establish an RRC connection.
  • the second device is further configured to: set a delay time, and in the reject message The delay time is used to indicate a time interval between the time when the terminal initiates the next RRC connection request and the time when the RRC connection request is initiated.
  • the second device is configured to set the delay time in the following manner: setting a value of the delay time equal to a value of a waiting time in the overload control signaling; or based on the waiting The value of the time sets the value of the delay time.
  • the core network may be congested due to the excessively large number of signalings initiated at the same time, thereby avoiding affecting the core network to process other connected connections. Service efficiency and quality of terminals to the network.
  • 1 is a schematic diagram of the composition of a cellular wireless communication system
  • FIG. 2 is a flow chart of Embodiment 1 of the present invention. Preferred embodiment of the invention
  • the present invention implements congestion control by setting parameters of the core network and controlling terminal access through the access network.
  • Step 10 The mobility management unit (MME) sends an overload control signaling to the base station when the overload occurs, where the overload control signaling is used to instruct the base station to perform load control.
  • MME mobility management unit
  • the MME When the MME is overloaded, it means that the current load of the MME reaches or exceeds the set threshold.
  • the overload control signaling can include latency, or include latency and the type of terminal that needs to be controlled.
  • Step 20 After receiving the overload control signaling, the base station rejects the terminal according to the overload control signaling. A request to establish a Radio Resource Control (RRC) connection.
  • RRC Radio Resource Control
  • the base station After receiving the overload control signaling, the base station performs connection control on the subsequently received RRC connection setup request.
  • the step of the base station rejecting the terminal's request for establishing an RRC connection according to the overload control signaling includes: sending a reject message to the terminal requesting to establish an RRC connection. , reject all requests from the terminal to establish an RRC connection.
  • the base station may carry the delay time of the next time the terminal initiates the establishment of the RRC connection request in the reject message, and is used to indicate the time interval between the time when the terminal initiates the next RRC connection request and the time when the RRC connection request is initiated.
  • the step of the base station denying the terminal to establish an RRC connection according to the overload control signaling includes: establishing an RRC to the request
  • the connected terminal that belongs to the terminal class indicated in the overload control signaling sends a reject message, rejecting the request of the terminal of the terminal class to establish an RRC connection.
  • the base station may carry the delay time of the next time the terminal sends an RRC connection request in the reject message.
  • the value of the delay time carried by the base station in the reject message may be equal to the value of the waiting time in the overload control signaling, or may be determined by the base station based on the value of the waiting time. For example, the base station determines the delay time based on the waiting time.
  • the base station can set different delay times for different terminals.
  • a message is sent to the base station to notify the base station to cancel the connection control.
  • a congestion control system implementing the above method, comprising: a first device located at the MME, and a second device at the base station, where:
  • the first device is configured to send an overload control signaling to the base station when the MME is overloaded
  • the second device is configured to: after receiving the overload control signaling, reject the establishment of the terminal according to the overload control signaling Request for RRC connection.
  • the second device is configured according to the following manner The overload control signaling rejects the terminal's request to establish an RRC connection: the second device sends a reject message to the terminal requesting the establishment of the RRC connection, rejecting the request of all terminals to establish an RRC connection.
  • the second device rejects the terminal's request to establish an RRC connection according to the overload control signaling in the following manner: the second device establishes an RRC connection to the request The terminal belonging to the terminal class indicated in the overload control signaling sends a reject message, rejecting the request for establishing an RRC connection of the terminal of the terminal class.
  • the second device is further configured to set a delay time, and carry the delay time in the reject message, where the delay time is used to indicate a time and a time for the terminal to initiate a next RRC connection request.
  • the second device sets the delay time in the following manner: setting the value of the delay time to be equal to the value of the waiting time in the overload control signaling; or setting the delay based on the value of the waiting time The value of the time.
  • Step 20 Set a threshold value Th for determining the overload for the mobility management unit (MME); the threshold value may be a percentage, which is expressed as a percentage of the maximum processing capacity of the MME.
  • Step 21 When the current load of the MME reaches the set threshold Th, the MME sends an overload control signaling “OVERLOAD START” to the base station, where the signaling is used to indicate that the base station performs load control, where “OVERLOAD START” signaling includes : 1) terminal class that needs to be rejected; 2) waiting time;
  • the information in the signaling may be a waiting time for each category, as follows:
  • the signaling includes a category of the terminal that needs to be rejected, and the base station needs to reject the RRC connection establishment of the terminal of the category according to the indication in the signaling.
  • Step 22 After receiving the "OVERLOAD START" signaling, the base station sets a delay time, which is used to indicate the time when the rejected terminal sends an RRC connection request next time.
  • the base station can directly use the waiting time in the signaling as the set delay time, or the base station uses the waiting time in the signaling as a reference value, and according to the local policy (for example, the maximum load that the base station itself can handle, or the base station needs to guarantee Minimum throughput rate) Set the delay time.
  • the local policy for example, the maximum load that the base station itself can handle, or the base station needs to guarantee Minimum throughput rate
  • Step 23 When the terminal requests to establish an RRC connection, the base station reads the class indication carried by the terminal in the RRC connection setup request signaling, and if it matches the category indicated in the “OVERLOAD START” signaling, rejects the RRC connection establishment of the terminal. And including the delay time in the RRC connection reject signaling, if not, agreeing to the RRC connection establishment of the terminal;
  • the base station decides whether to reject the RRC connection establishment request of the terminal according to the "OVERLOAD START" signaling.
  • Step 24 After receiving the RRC connection reject signaling, the terminal runs a delay timer locally, and the value is set to a delay time in the RRC connection reject signaling. During the running of the timer, the terminal does not initiate the RRC again. The connection is established. After the timer expires, the terminal initiates an RRC connection establishment again.
  • Step 30 Set a threshold value Th for determining the overload for the mobility management unit (MME).
  • Step 31 When the current load of the MME reaches the set threshold Th, the MME sends an overload control signaling “OVERLOAD START” to a base station, the signaling is used to instruct the base station to perform load control, where the "OVERLOAD START” signaling includes: a waiting time;
  • the OVERLOAD START signaling does not include the terminal class to be rejected, and the base station rejects the RRC connection establishment of all signaling.
  • Step 32 After receiving the "OVERLOAD START" signaling, the base station sets a delay time, which is used to indicate the time when the rejected terminal sends an RRC connection request next time:
  • Step 33 When the terminal requests to establish an RRC connection, the base station rejects the RRC connection establishment of all the terminals, and includes the delay time in the RRC connection reject signaling.
  • the base station rejects the RRC connection setup request of all terminals according to the "OVERLOAD START" signaling.
  • Step 34 After receiving the RRC connection reject signaling, the terminal runs a delay timer locally, and the value is set to a delay time in the RRC connection reject signaling. During the running of the timer, the terminal does not initiate the RRC again. The connection is established. After the timer expires, the terminal initiates an RRC connection establishment again.
  • the core network may be congested due to the excessively large number of signalings initiated at the same time, thereby avoiding affecting the core network to process other connected connections. Service efficiency and quality of terminals to the network.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

本发明公开了一种机器类型通信设备的拥塞控制方法及系统,避免大量MTC设备可能导致的网络拥塞。所述方法包括:MME在过载时向基站发送过载控制信令;基站接收到所述过载控制信令后,根据过载控制信令拒绝终端的建立RRC连接的请求。所述系统包括位于MME的第一装置,以及位于基站的第二装置,第一装置用于在MME过载时向基站发送过载控制信令;第二装置用于在接收到过载控制信令后,根据过载控制信令拒绝终端的建立RRC连接的请求。本发明方法可以避免当数量庞大的MTC设备都需要接入网络接收服务时,可能由于同时发起的信令数量过于庞大而导致的核心网拥塞,避免影响核心网处理其他已连接到网络的终端的服务效率和质量。

Description

一种机器类型通信设备的拥塞控制方法及系统
技术领域
本发明涉及终端通信领域, 具体涉及机器类型通信 (Machine Type Communication, 简称 MTC )设备的拥塞控制方法及系统。
背景技术
如图 1所示,蜂窝无线通讯系统主要由核心网(Core Network,简称 CN )、 接入网 ( Radio Access Network , 简称 RAN ) 和终端即用户设备 ( User Equipment, 简称 UE )组成。 核心网负责非接入层事务, 例如终端位置更新 等, 并且是用户面的锚点。 接入网包括基站, 或者基站以及基站控制, 接入 网负责接入层事务(例如无线资源的管理) , 基站之间可以根据实际情况存 在物理或者逻辑上的连接,如图 1中的基站 1和基站 2之间的连接以及基站 1 和基站 3之间的连接, 并且每个基站可以和一个或者一个以上的核心网节点 连接。 终端是指可以和蜂窝无线通讯网络通讯的各种设备, 比如移动电话或 者笔记本电脑等。
MTC业务即机器之间机器进行通信的业务。 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者专门的 MTC运营商的特定服务器进行管理, 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业务引入了一些与传统移动通信不同的特性, 例如组管理特性, 该 特性被激活时, 同一个用户的 MTC设备可能被划分为一个组, 网络可以对整 个组进行统一配置参数,这些参数应用于属于该组的所有 MTC设备,运营商 在该 MTC设备的签约信息中设置并激活组管理特性,存储在归属用户服务器 ( Home Subscriber Server, 简称 HSS ) 中。 HSS是电信网络中负责保存用户 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。
在 MTC设备附着到网络上时, 移动性管理实体(Mobility Management
Entity, 简称 MME )从用户归属服务器( HSS )中获得该 MTC设备的签约信 息, 并保存在本地。 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 (如全球唯一临时标识 (GUTI ) 以及跟踪 区标识列表(TAI list ) )指配, 用户标识和设备标识验证, 信令面加密, 与演 进型基站( eNB )之间的一致性保护, 2G/3G与演进分组系统( Evolved Packet System,简称 EPS )之间安全参数以及服务质量( Quality of Service,简称 QoS ) 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(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, 以及网元选择等。
由于引入 MTC技术后,可能存在大量的 MTC设备, 当数量庞大的 MTC 设备都需要接入网络接收服务时, 可能由于同时发起的信令数量过于庞大而 导致核心网拥塞, 从而影响核心网处理其他已连接到网络的终端的服务效率 和质量, 例如大量新接入设备的信令影响已接入设备的信令处理速度。 发明内容
本发明要解决的技术问题是提供一种机器类型通信设备的拥塞控制方法 及系统, 避免大量 MTC设备可能导致的网络拥塞。
为解决上述技术问题, 本发明提供了一种机器类型通信设备的拥塞控制 方法, 包括:
移动性管理单元(MME )在过载时向基站发送过载控制信令;
所述基站接收到所述过载控制信令后 , 根据所述过载控制信令拒绝终端 的建立无线资源控制 (RRC )连接的请求。
可选地, 所述过载控制信令包括等待时间; 所述基站根据所述过载控制 信令拒绝终端的建立 RRC连接的请求的步骤包括:所述基站向请求建立 RRC 连接的终端发送拒绝消息, 拒绝所有终端的建立 RRC连接的请求。
可选地, 所述过载控制信令包括等待时间和需要进行控制的终端类别; 所述基站根据所述过载控制信令拒绝终端的建立 RRC连接的请求的步骤包 括:所述基站向请求建立 RRC连接的且属于所述过载控制信令中指示的终端 类别的终端发送拒绝消息,拒绝属于所述终端类别的终端的建立 RRC连接的 请求。
可选地, 所述基站在所述拒绝消息中携带延时时间, 用于指示所述终端 发起下一次 RRC连接请求的时间与本次发起 RRC连接请求的时间的时间间 隔。
可选地, 所述延时时间的值等于所述过载控制信令中的等待时间的值, 或由所述基站基于所述等待时间的值决定。
为解决上述技术问题, 本发明还提供了一种机器类型通信设备的拥塞控 制系统, 包括: 位于移动性管理单元(MME )的第一装置, 以及位于基站的 第二装置, 其中:
所述第一装置设置为: 在 MME过载时向基站发送过载控制信令; 所述第二装置设置为: 在接收到所述过载控制信令后, 根据所述过载控 制信令拒绝终端的建立无线资源控制 (RRC )连接的请求。
可选地, 所述过载控制信令包括等待时间; 所述第二装置是设置为釆用 以下方式根据所述过载控制信令拒绝终端的建立 RRC连接的请求:向请求建 立 RRC连接的终端发送拒绝消息, 拒绝所有终端的建立 RRC连接的请求。
可选地, 所述过载控制信令包括等待时间和需要进行控制的终端类别; 所述第二装置是设置为釆用以下方式才艮据所述过载控制信令拒绝终端的建立 RRC连接的请求: 向请求建立 RRC连接的且属于所述过载控制信令中指示 的终端类别的终端发送拒绝消息,拒绝所述终端类别的终端的建立 RRC连接 的请求。
可选地, 所述第二装置还设置为: 设置延时时间, 并在所述拒绝消息中 携带所述延时时间 ,所述延时时间用于指示所述终端发起下一次 RRC连接请 求的时间与本次发起 RRC连接请求的时间的时间间隔。
可选地, 所述第二装置是设置为釆用以下方式设置所述延时时间: 设置 所述延时时间的值等于所述过载控制信令中的等待时间的值; 或者基于所述 等待时间的值设置所述延时时间的值。
釆用本发明所述方法,可以避免当数量庞大的 MTC设备都需要接入网络 接收服务时, 可能由于同时发起的信令数量过于庞大而导致的核心网拥塞, 避免影响核心网处理其他已连接到网络的终端的服务效率和质量。 附图概述
图 1为蜂窝无线通讯系统的组成示意图;
图 2为本发明实施例 1流程图。 本发明的较佳实施方式
为解决上述技术问题, 本发明由核心网设置参数并通过接入网来控制终 端接入来实现拥塞控制。
下文中将结合附图对本发明的实施例进行详细说明。 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任意组合。
实施例 1
如图 2所示, 包括:
步骤 10, 移动性管理单元(MME )在过载时向基站发送过载控制信令, 该过载控制信令用于指示基站进行负载控制;
MME过载时是指 MME当前的负载达到或超过设定门限。
过载控制信令中可以包含等待时间, 或者包含等待时间和需要进行控制 的终端类别。
步骤 20, 基站接收到过载控制信令后, 根据该过载控制信令拒绝终端的 建立无线资源控制 ( Radio Resource Control, 简称 RRC )连接的请求。
基站只在接收到过载控制信令后,对之后接收到的 RRC连接建立请求进 行连接控制。
如果过载控制信令中仅包含等待时间, 则表示所有终端均需要等待, 此 时,基站根据过载控制信令拒绝终端的建立 RRC连接的请求的步骤包括: 向 请求建立 RRC连接的终端发送拒绝消息, 拒绝所有终端的建立 RRC连接的 请求。优选地,基站可以在拒绝消息中携带终端下次发送建立 RRC连接请求 的延时时间,用于指示终端发起下一次 RRC连接请求的时间与本次发起 RRC 连接请求的时间的时间间隔。
如果过载信令中包括等待时间和对应的终端类别, 则表示仅该种类别的 终端需要等待, 此时,基站根据过载控制信令拒绝终端的建立 RRC连接的请 求的步骤包括:向请求建立 RRC连接的且属于过载控制信令中指示的终端类 别的终端发送拒绝消息, 拒绝该种终端类别的终端的建立 RRC连接的请求。 优选地,基站可以在拒绝消息中携带终端下次发送建立 RRC连接请求的延时 时间。
上述基站在拒绝消息中携带的延时时间的值可以等于过载控制信令中的 等待时间的值, 也可以由基站基于该等待时间的值自行决定, 例如基站基于 该等待时间决定延时时间的方式可以是, 延时时间=等待时间 /2。 基站可以为 不同的终端设置不同的延时时间。
当 MME恢复正常, 即处于正常负荷状态后, 向基站发送消息, 用以通 知基站取消连接控制。
实现上述方法的拥塞控制系统, 包括: 位于 MME的第一装置, 以及位 于基站的第二装置, 其中:
所述第一装置, 用于在 MME过载时向基站发送过载控制信令; 所述第二装置, 用于在接收到所述过载控制信令后, 根据所述过载控制 信令拒绝终端的建立 RRC连接的请求。
如果上述过载控制信令包括等待时间; 则该第二装置釆用以下方式根据 所述过载控制信令拒绝终端的建立 RRC连接的请求: 第二装置向请求建立 RRC连接的终端发送拒绝消息, 拒绝所有终端的建立 RRC连接的请求。
如果上述过载控制信令包括等待时间和需要进行控制的终端类别; 则该 第二装置釆用以下方式根据所述过载控制信令拒绝终端的建立 RRC连接的 请求:第二装置向请求建立 RRC连接的且属于所述过载控制信令中指示的终 端类别的终端发送拒绝消息,拒绝该种终端类别的终端的建立 RRC连接的请 求。
优选地, 该第二装置还用于设置延时时间, 并在所述拒绝消息中携带所 述延时时间,所述延时时间用于指示所述终端发起下一次 RRC连接请求的时 间与本次发起 RRC连接请求的时间的时间间隔。所述第二装置釆用以下方式 设置所述延时时间: 设置所述延时时间的值等于所述过载控制信令中的等待 时间的值; 或者基于所述等待时间的值设置所述延时时间的值。
实施例 2
步骤 20, 为移动性管理单元(MME )设置一个判断过载的门限值 Th; 该门限值可以为百分比, 表示为 MME最大处理能力的百分比。
步骤 21 , 当 MME当前的负载达到设定的门限值 Th时, MME发送过载 控制信令 "OVERLOAD START" 给基站, 该信令用于指示基站执行负载控 制, 其中 "OVERLOAD START" 信令包括: 1 )需要拒绝的终端类别; 2 ) 等待时间;
如果有多个类别需要被拒绝, 则该信令中的信息可以是每个类别对应一 个等待时间, 如下结构:
类别 1 : 等待时间 1 ;
类别 2: 等待时间 2;
类别 3: 等赛时间 3;
也可以是所有类别对应同一个等待时间, 如下结构: 类别 1 , 类别 2, 类别 3 , ... ...: 等待时间。
在本实施例中, 信令中包含需要拒绝的终端类别, 基站需要根据信令中 的指示, 拒绝该类别的终端的 RRC连接建立。
步骤 22, 基站接收到 "OVERLOAD START" 信令后, 基站设置延时时 间, 用于指示被拒绝的终端下次发送建立 RRC连接请求的时间;
基站可以直接将信令中的等待时间作为设置的延时时间, 或者基站将信 令中的等待时间作为参考值, 并根据本地策略(例如基站自身运行所能处理 的最大负载, 或基站需要保证的最小吞吐率)设置延时时间。
步骤 23 , 当终端请求建立 RRC连接时, 基站读取终端在 RRC连接建立 请求信令中携带的类别指示, 如果与 "OVERLOAD START" 信令中指示的 类别相符, 则拒绝该终端的 RRC连接建立, 并在 RRC连接拒绝信令中包含 延时时间, 如果不相符, 则同意该终端的 RRC连接建立;
在本实施例中, 基站根据 "OVERLOAD START" 信令决定是否拒绝终 端的 RRC连接建立请求。
步骤 24, 终端在接收到 RRC连接拒绝信令后, 在本地运行一个延时定 时器, 其值设定为 RRC连接拒绝信令中的延时时间, 在定时器运行期间, 终 端不再次发起 RRC连接建立, 待定时器到时后, 终端再次发起 RRC连接建 立。
实施例 3
步骤 30, 为移动性管理单元(MME )设置一个判断过载的门限值 Th; 步骤 31 , 当 MME当前的负载达到设定的门限值 Th时, MME发送过载 控制信令 "OVERLOAD START" 给基站, 该信令用于指示基站执行负载控 制, 其中 "OVERLOAD START" 信令包括: 等待时间;
在本实施例中, OVERLOAD START信令中不包含需要拒绝的终端类别, 基站则拒绝所有信令的 RRC连接建立。
步骤 32, 基站接收到 "OVERLOAD START" 信令后, 基站设置延时时 间, 用于指示被拒绝的终端下次发送建立 RRC连接请求的时间: 步骤 33 , 当终端请求建立 RRC连接时, 基站拒绝所有终端的 RRC连接 建立, 并在 RRC连接拒绝信令中包含延时时间
在本实施例中, 基站根据 "OVERLOAD START" 信令拒绝所有终端的 RRC连接建立请求。
步骤 34, 终端在接收到 RRC连接拒绝信令后, 在本地运行一个延时定 时器, 其值设定为 RRC连接拒绝信令中的延时时间, 在定时器运行期间, 终 端不再次发起 RRC连接建立, 待定时器到时后, 终端再次发起 RRC连接建 立。
本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序 来指令相关硬件完成, 所述程序可以存储于计算机可读存储介质中, 如只读 存储器、 磁盘或光盘等。 可选地, 上述实施例的全部或部分步骤也可以使用 一个或多个集成电路来实现。 相应地, 上述实施例中的各模块 /单元可以釆用 硬件的形式实现, 也可以釆用软件功能模块的形式实现。 本发明不限制于任 何特定形式的硬件和软件的结合。
当然, 本发明还可有其他多种实施例, 在不背离本发明精神及其实质的 但这些相应的改变和变形都应属于本发明所附的权利要求的保护范围。
工业实用性
釆用本发明所述方法,可以避免当数量庞大的 MTC设备都需要接入网络 接收服务时, 可能由于同时发起的信令数量过于庞大而导致的核心网拥塞, 避免影响核心网处理其他已连接到网络的终端的服务效率和质量。

Claims

权 利 要 求 书
1、 一种机器类型通信设备的拥塞控制方法, 包括:
移动性管理单元(MME )在过载时向基站发送过载控制信令; 所述基站接收到所述过载控制信令后 , 根据所述过载控制信令拒绝终端 的建立无线资源控制 (RRC )连接的请求。
2、 如权利要求 1所述的方法, 其中,
所述过载控制信令包括等待时间;
所述基站根据所述过载控制信令拒绝终端的建立 RRC连接的请求的步 骤包括:
所述基站向请求建立 RRC连接的终端发送拒绝消息,拒绝所有终端的建 立 RRC连接的请求。
3、 如权利要求 1所述的方法, 其中,
所述过载控制信令包括等待时间和需要进行控制的终端类别;
所述基站根据所述过载控制信令拒绝终端的建立 RRC连接的请求的步 骤包括:
所述基站向请求建立 RRC 连接的且属于所述过载控制信令中指示的终 端类别的终端发送拒绝消息,拒绝属于所述终端类别的终端的建立 RRC连接 的请求。
4、 如权利要求 2或 3所述的方法, 其中,
所述基站在所述拒绝消息中携带延时时间, 用于指示所述终端发起下一 次 RRC连接请求的时间与本次发起 RRC连接请求的时间的时间间隔。
5、 如权利要求 4所述的方法, 其中,
所述延时时间的值等于所述过载控制信令中的等待时间的值, 或由所述 基站基于所述等待时间的值决定。
6、 一种机器类型通信设备的拥塞控制系统, 包括: 位于移动性管理单元
( MME ) 的第一装置, 以及位于基站的第二装置, 其中: 所述第一装置设置为: 在 MME过载时向基站发送过载控制信令; 所述第二装置设置为: 在接收到所述过载控制信令后, 根据所述过载控 制信令拒绝终端的建立无线资源控制 (RRC )连接的请求。
7、 如权利要求 6所述的系统, 其中,
所述过载控制信令包括等待时间;
所述第二装置是设置为釆用以下方式根据所述过载控制信令拒绝终端的 建立 RRC连接的请求:
向请求建立 RRC连接的终端发送拒绝消息, 拒绝所有终端的建立 RRC 连接的请求。
8、 如权利要求 6所述的系统, 其中,
所述过载控制信令包括等待时间和需要进行控制的终端类别;
所述第二装置是设置为釆用以下方式根据所述过载控制信令拒绝终端的 建立 RRC连接的请求:
向请求建立 RRC 连接的且属于所述过载控制信令中指示的终端类别的 终端发送拒绝消息, 拒绝属于所述终端类别的终端的建立 RRC连接的请求。
9、 如权利要求 7或 8所述的系统, 其中,
所述第二装置还设置为: 设置延时时间, 并在所述拒绝消息中携带所述 延时时间,所述延时时间用于指示所述终端发起下一次 RRC连接请求的时间 与本次发起 RRC连接请求的时间的时间间隔。
10、 如权利要求 9所述的系统, 其中,
所述第二装置是设置为釆用以下方式设置所述延时时间: 设置所述延时 时间的值等于所述过载控制信令中的等待时间的值; 或者基于所述等待时间 的值设置所述延时时间的值。
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