WO2012174943A1 - 一种确定终端状态的方法、装置和系统 - Google Patents

一种确定终端状态的方法、装置和系统 Download PDF

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Publication number
WO2012174943A1
WO2012174943A1 PCT/CN2012/074663 CN2012074663W WO2012174943A1 WO 2012174943 A1 WO2012174943 A1 WO 2012174943A1 CN 2012074663 W CN2012074663 W CN 2012074663W WO 2012174943 A1 WO2012174943 A1 WO 2012174943A1
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WO
WIPO (PCT)
Prior art keywords
terminal
network side
sending
timer
state
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PCT/CN2012/074663
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English (en)
French (fr)
Inventor
王坚
吴传喜
吴昊
尚国强
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中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to US14/125,716 priority Critical patent/US9706520B2/en
Priority to EP12802251.4A priority patent/EP2713666B1/en
Publication of WO2012174943A1 publication Critical patent/WO2012174943A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W68/00User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H04W68/02Arrangements for increasing efficiency of notification or paging channel
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W60/00Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H04W60/02Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration by periodical registration
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/70Services for machine-to-machine communication [M2M] or machine type communication [MTC]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W68/00User notification, e.g. alerting and paging, for incoming communication, change of service or the like

Definitions

  • the present invention relates to the field of mobile communications, and in particular, to a method, apparatus and system for determining a state of a terminal. Background technique
  • Machine Type Communication is a communication type of machine-to-machine (M2M) machine communication through 3GPP mobile communication networks.
  • Machine-to-machine services include monitoring systems, driving route records, physical access control, and automobiles. / Driving safety, etc., the industry involved is very wide, and the number of MTC terminals generated will be very large. The signaling interaction between such a large number of MTC terminals and the network will bring potential congestion to the signaling network.
  • the prior art uses system broadcast messages to block signaling access to MTC terminals; or uses dedicated messages to block signaling access by MTC terminals.
  • the mobile communication network can control the load of the network to avoid congestion.
  • the blocking of the broadcast message will use the access class barring (ACB) and the extended access barring (EAB).
  • the terminal that satisfies the ACB/EAB blocking condition will initiate a back-off time correlation. The timer, during which the terminal is unable to initiate signaling access.
  • the non-access node such as a mobility management entity (MME)
  • MME mobility management entity
  • the back-off time indicates that the terminal does not initiate a signaling request within the back-off time
  • the access layer node such as an evolved Node B (eNB)
  • eNB evolved Node B
  • the wait time indicates that the MTC can initiate signaling access again after the wait time.
  • the technical problem to be solved by the embodiments of the present invention is to provide a method, device, and system for determining the state of a terminal, to prevent the network side from erroneously thinking that the terminal is in an offline state.
  • an embodiment of the present invention provides a method for determining a state of a terminal, including:
  • the network side When the network side does not receive the location update initiated by the terminal, the network side sends a paging message to the terminal, and triggers the terminal to initiate an interaction process with the network side. Determining the status of the terminal.
  • the sending a paging message to the terminal, triggering the terminal to initiate an interaction process with the network side including: sending a paging message carrying a tracking area update (TAU) indication to the terminal, triggering the terminal to the current
  • TAU tracking area update
  • the sending a paging message to the terminal, triggering the terminal to initiate an interaction process with the network side including: sending a paging message to the terminal, and triggering the terminal to send a service request message to the currently-owned network management entity;
  • the method further includes: after receiving the service request message, the network management entity feeds back a service rejection message to the terminal.
  • the sending a paging message to the terminal, triggering the terminal to initiate an interaction process with the network side including: sending a paging message to the terminal, triggering the terminal to send a service request to the currently-located first network management entity.
  • the message after receiving the service request message, the first network management entity returns a rejection message of the load balancing to the terminal, and triggers the terminal to initiate a TAU process to the second network management entity.
  • the determining the status of the terminal includes:
  • An embodiment of the present invention further provides a method for determining a state of a terminal, including:
  • the terminal initiates a location update to the network management entity to which the terminal belongs, so that the network side determines that the terminal is in an online state.
  • the limited time includes a backoff time or a waiting time
  • the terminal includes a machine type communication (MTC) terminal or a non-MTC terminal.
  • MTC machine type communication
  • An embodiment of the present invention further provides a method for determining a state of a terminal, including:
  • the network side extends the access timer corresponding to the terminal, and the extended accessibility timer time is greater than or equal to the maximum value of the terminal limit time;
  • the terminal If the terminal triggers a location update failure before its periodic timer expires, the terminal re-initiates a location update procedure to the network side when the limited time timer expires, so that the network side determines that the terminal is in the online status.
  • the limited time includes a backoff time or a waiting time
  • the terminal includes a machine type communication (MTC) terminal or a non-MTC terminal.
  • MTC machine type communication
  • An embodiment of the present invention further provides an apparatus for determining a state of a terminal, including a determining module, a sending module, and a state determining module, where:
  • the determining module is configured to determine whether the location update initiated by the terminal is received when the accessibility timer corresponding to the terminal expires;
  • the sending module is configured to send a paging message to the terminal when the determining module determines that the location update initiated by the terminal is not received when the access timer corresponding to the terminal expires, triggering the terminal to initiate Interaction process with the network side;
  • the state determination module is configured to determine a state of the terminal.
  • the sending module is configured to send a paging message to the terminal in the following manner, triggering the terminal to initiate an interaction process with the network side: sending, to the terminal, a paging message carrying a tracking area update (TAU) indication Initiating the terminal to initiate a TAU process to the currently-owned network management entity; or
  • TAU tracking area update
  • the sending module is configured to send a paging message to the terminal in the following manner, triggering the terminal to initiate an interaction process with the network side: sending a paging message to the terminal, triggering the terminal to the current home network
  • the management entity sends a service request message; the sending module is further configured to: after receiving the service request message sent by the terminal, feed back the service rejection message to the terminal; or
  • the sending module is configured to send a paging message to the terminal in the following manner, triggering the terminal to initiate an interaction process with the network side: sending a paging message to the terminal, triggering the terminal to the current belonging a network management entity sends a service request message; the sending module is further configured to: after receiving the service request message sent by the terminal, feed back to the terminal a reason for the load balancing rejection message, triggering the terminal to initiate the sending to the second network management entity. TAU process.
  • the determining module is configured to determine the state of the terminal in the following manner: after the end of the interaction process initiated by the terminal and the network side, determining that the terminal is in an online state, restarting the accessibility of the terminal Timer.
  • the embodiment of the invention further provides a device for determining the state of the terminal, which is located at the terminal, and includes a timer judging module and a sending module, where:
  • the timer determining module is configured to determine whether a periodic timer of the terminal expires within a time limit of the terminal;
  • the sending module is configured to: when the timer determining module determines that the periodic timer of the terminal expires within a time limit of the terminal, initiate a location update to the network management entity to which the terminal belongs, so that the network The side determines that the terminal is in an online state.
  • An embodiment of the present invention further provides a system for determining a state of a terminal, including an extension module and a sending module, where:
  • the extension module is located on the network side, and is configured to extend a reachability timer corresponding to the terminal, and the time length of the accessibility timer is greater than or equal to a maximum value of the terminal limit time;
  • the sending module is located on the terminal side, and is configured to determine that the terminal triggers a location update failure before the periodic timer expires, and then initiates a location update process to the network side when the limited time timer expires, so as to enable the The network side determines that the terminal is in an online state.
  • the network side can know the state of the MTC terminal in time, and does not mistakenly think that the terminal is offline (not available), and deletes the mobility context of the terminal.
  • FIG. 1 is a flowchart of a first embodiment of the present invention
  • FIG. 3 is a flow chart of a third embodiment of the present invention.
  • FIG. 5 is a flowchart of a solution according to Embodiment 5 of the present invention. Preferred embodiment of the invention
  • the MTC terminal does not initiate the TAU process, and the consequence is that the MME is
  • the reachable timer of the MTC terminal expires (the accessibility timer is synchronized with the periodic timer on the MTC terminal)
  • the core network does not receive the TAU process initiated by the MTC terminal, The core network will consider that the MTC terminal is offline, and the mobility context of the MTC terminal will be deleted.
  • the network side When the network side does not receive the location update initiated by the terminal, the network side sends a paging message to the terminal, triggering the terminal to initiate an interaction process with the network side, and determining the status of the terminal.
  • the sending a paging message to the terminal triggers the terminal to initiate an interaction process with the network side, including any one of the following methods:
  • Mode 1 Sending a paging message carrying a tracking area update (TAU) indication to the terminal, triggering the terminal to initiate a TAU procedure to the currently home network management entity.
  • TAU tracking area update
  • the triggering terminal sends a service request message to the currently-owned network management entity; after receiving the service request message, the network management entity feeds back the service rejection message to the terminal. See Example 2 for details.
  • the triggering terminal sends a service request message to the currently-located first network management entity, and after receiving the service request message, the first network management entity feeds back to the terminal a reason for the load balancing rejection message, triggering the terminal to initiate The TAU process of the entity is managed to the second network. See Example 3 for details.
  • the device for implementing the method includes a determining module, a sending module, and a state determining module, where: the determining module is configured to determine whether a location update initiated by the terminal is received when the accessibility timer corresponding to the terminal expires;
  • the sending module is configured to: when the determining module determines that the location update initiated by the terminal is not received, the sending module sends a paging message to the terminal, triggering the terminal to initiate interaction with the network side. Process;
  • the status determination module is configured to determine the status of the terminal.
  • the sending module is configured to send a paging message to the terminal in the following manner, triggering the terminal to initiate an interaction process with the network side: sending, to the terminal, a paging message carrying a tracking area update (TAU) indication, Triggering the terminal to initiate a TAU process to the currently home network management entity; or
  • TAU tracking area update
  • the sending module is configured to send a paging message to the terminal in the following manner, triggering the terminal to initiate an interaction process with the network side: sending a paging message to the terminal, triggering the terminal to manage the current home network
  • the entity sends a service request message; the sending module is further configured to: after receiving the service request message sent by the terminal, feed back the service rejection message to the terminal; or
  • the sending module is configured to send a paging message to the terminal in the following manner, triggering the The terminal initiates an interaction process with the network side: sending a paging message to the terminal, triggering the terminal to send a service request message to the currently-located first network management entity; the sending module is further configured to receive the service sent by the terminal After the message is requested, the terminal rejects the reject message of the load balancing, and triggers the terminal to initiate a TAU process to the second network management entity.
  • the terminal initiates a location update to the network management entity to which the terminal belongs, so that the network side determines that the terminal is in the online state. See Example 4 for details.
  • the device for implementing the method is located at the terminal, and includes a timer judging module and a sending module, where: the timer judging module is configured to determine whether the periodic timer of the terminal expires within a limited time of the terminal;
  • the sending module is configured to: when the timer determining module determines that the periodic timer of the terminal expires within the limited time of the terminal, initiate a location update to the network management entity to which the terminal belongs, so that the network side determines that the terminal is online. status.
  • the network side extends the access timer corresponding to the terminal, and the extended time is greater than or equal to the maximum value of the terminal limit time;
  • the terminal fails to trigger the location update before the periodic timer of the terminal expires (the periodic timer of the terminal does not remain unchanged with the accessibility timer), the terminal expires in the limited time timer.
  • the location update process is initiated again to the network side, so that the network side determines that the terminal is in an online state. See Example 5 for details.
  • a system implementing the method includes an extension module and a transmission module, wherein:
  • the extension module is located on the network side, and is set to extend the access timer corresponding to the terminal, and is extended.
  • the later time is greater than or equal to the maximum value of the terminal limit time
  • the sending module is located on the terminal side, and is configured to determine that the terminal triggers the location update failure before the periodic timer expires, and then initiates a location update process to the network side when the limited time timer expires, so that the network side determines The terminal is online.
  • Step 101 The MME finds that the reachability timer of the MTC terminal expires, but has not received the Tracking Area Update (TAU) initiated by the MTC terminal, and performs step 102;
  • Step 102 The MME sends the carried TAU Indicating paging message (post with TAU) to the MTC terminal;
  • Step 103 After receiving the paging message with the TAU, the MTC terminal initiates a tracking area update, and performs a tracking area update (TAU) process with the MME and the HSS (Home subscriber server).
  • TAU tracking area update
  • Step 104 The tracking area is updated successfully, and the MTC terminal restarts the periodic timer.
  • Step 105 The tracking area is updated successfully, and the MME restarts the accessibility timer.
  • the core network learns that the MTC terminal is still online, and does not delete the mobility context of the MTC terminal.
  • Step 201 The MME finds that the access timer of the MTC terminal expires, but the tracking area update initiated by the MTC terminal has not been received, and step 202 is performed;
  • Step 202 The MME sends a paging message to the MTC terminal.
  • Step 203 After receiving the paging message, the MTC terminal sends a service request (Service Request). Message to the MME;
  • the service request message sent by the MTC terminal is an empty service request message, and the MTC terminal establishes a signaling link with the MME through the service request message.
  • Step 204 The MME sends a Service Reject message to the MTC terminal.
  • Step 205 The MTC terminal restarts the periodic timer.
  • Step 206 The MME restarts the accessibility timer.
  • the MME sends a paging message to the MTC terminal, so that the MTC terminal can actively send a service request to the MME, so that the core network learns that the MTC terminal is still online, and does not delete the mobility of the MTC terminal. Context.
  • Step 301 MME1 finds that the access timer of the MTC terminal expires, but the tracking area update initiated by the MTC terminal has not been received, and step 302 is performed;
  • Step 302 The MME1 sends a paging message to the MTC terminal.
  • Step 303 After receiving the paging message, the MTC terminal sends a service request to the MME.
  • Step 304 The MME1 sends a Service Reject with load balance TAU require message to the MTC terminal.
  • the MME1 can switch the MTC terminal to other MMEs through the above paging message.
  • Step 305 The MTC terminal initiates a tracking area update, and performs a TAU process with the MME2 and the HSS.
  • Step 306 The MTC terminal restarts the periodic timer.
  • Step 307 MME2 restarts the accessibility timer.
  • the MME1 sends a paging message to the MTC terminal, and the MTC terminal sends a service request to the MME1 to send a location update request to the MME2, so that the core network (the MME2 in this embodiment) knows that the MTC terminal is still online. Status, the mobility context of the MTC terminal will not be deleted.
  • Step 401 The backoff time of the MTC terminal entering the signaling
  • Step 402 During the backoff time, the periodic timer of the MTC terminal expires, and the MTC terminal initiates a TAU process, and performs a TAU process with the MME and the HSS.
  • Step 403 The MTC terminal restarts the periodic timer.
  • Step 404 The MME restarts the accessibility timer.
  • the MTC terminal can initiate the TAU process within the limited time, so that the core network knows in time that the MTC terminal is still online, and thus does not delete the mobility context of the MTC terminal.
  • Step 501 The MME extends the accessibility timer of the MTC terminal in the limited time (backoff time or waiting time), and the extended time is greater than or equal to the maximum value of the MTC terminal limiting time;
  • Step 502 The TAU process is not triggered when the periodic timer of the MTC terminal expires, and the TAU initiation failure is recorded (for example, by a counter);
  • Step 503 The MTC terminal expires the timer, and the MTC terminal determines that there is a TAU failure record, and then re-initiates the TAU process, and performs a TAU process with the MME and the HSS.
  • Step 504 The MTC terminal restarts the periodic timer.
  • Step 505 The MME restarts the accessibility timer.
  • the time for determining the state of the terminal is delayed, so that the network side acquires the correct state of the MTC terminal, and avoids accidentally deleting the mobility context of the MTC terminal.
  • the above embodiments are also applicable to non-MTC terminals that are in the ACB backoff time and receive the RRC Connection Release message waiting time.
  • the above embodiment only uses the network management entity as the MME as an example.
  • MME Mobile Switching Center
  • SGSN Serving GPRS Support
  • Node Node
  • the network side can know the state of the MTC terminal in time, and does not mistakenly believe that the terminal is offline (not available), and deletes the mobility context of the terminal.

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Abstract

一种确定终端状态的方法、装置和系统,避免网络侧错误地认为终端处于离线状态。所述方法包括:判断在终端对应的可及性定时器到期时没有接收到所述终端发起的位置更新,则向所述终端发送寻呼消息,触发所述终端发起与网络侧的交互流程,确定所述终端的状态。所述装置包括判断模块、发送模块以及状态确定模块。采用该方法、装置和系统,网络侧可以及时获知MTC终端的状态,不会错误地认为终端处于离线状态,而删除终端的移动性上下文。

Description

一种确定终端状态的方法、 装置和系统
技术领域
本发明涉及移动通信领域, 具体涉及一种确定终端状态的方法、 装置和 系统。 背景技术
机器类通信 (Machine Type Communication, MTC)是机器到机器(M2M, machine to machine )业务通过 3GPP移动通信网络进行的通信类型, 机器到 机器的业务包括监控系统, 行车路线记录, 物理访问控制, 汽车 /驾驶安全等 等, 涉及的行业范围很广, 产生的 MTC终端的数量将非常巨大, 如此大量的 MTC终端与网络之间的信令交互将给信令网络带来潜在拥塞的威胁。
现有技术釆用系统广播消息来进行对 MTC终端的信令访问进行阻拦;或 者釆用专用消息来对 MTC终端的信令访问进行阻拦。 通过这些拥塞控制措 施, 移动通信网络能够对网络的负荷进行控制, 避免拥塞的发生。 广播消息 的阻拦将釆用接入类阻拦 (ACB, access class barring)/扩展接入阻拦(EAB, extended access barring ) , 满足 ACB/EAB 阻拦条件的终端将启动一个退避 (back-off)时间相关的定时器, 在该定时器运行期间, 终端无法发起信令访问。 釆用专用消息对 MTC终端的信令访问进行阻拦时,非接入节点如移动性管理 实体 (MME, mobility management entity)通过在 MTC终端的非接入层信令请 求的响应中带入退避 (back-off)时间来指示终端在该退避时间内不发起信令请 求, 或者接入层节点如演进节点 B ( eNB, evolved Node B )通过在 MTC终端 的无线资源控制连接请求的响应消息中带入等待时间 (wait time)指示 MTC在 wait time之后才能再次发起信令访问。
在实际应用过程中, 常常出现核心网认为某个 MTC终端处于离线状态, 但实际上该 MTC终端并未离线的现象。 发明内容 本发明实施例要解决的技术问题是提供一种确定终端状态的方法、 装置 和系统, 避免网络侧错误地认为终端处于离线状态。
为解决上述技术问题, 本发明实施例提供了一种确定终端状态的方法, 包括:
网络侧判断在终端对应的可及性定时器到期时没有接收到所述终端发起 的位置更新, 则向所述终端发送寻呼消息, 触发所述终端发起与所述网络侧 的交互流程, 确定所述终端的状态。
可选的,
所述向所述终端发送寻呼消息,触发所述终端发起与网络侧的交互流程, 包括: 向所述终端发送携带有跟踪区更新 (TAU )指示的寻呼消息, 触发所 述终端向当前归属的网络管理实体发起 TAU过程。
可选的,
所述向所述终端发送寻呼消息,触发所述终端发起与网络侧的交互流程, 包括: 向所述终端发送寻呼消息, 触发所述终端向当前归属的网络管理实体 发送业务请求消息;
所述方法还包括: 所述网络管理实体在收到所述业务请求消息后, 向所 述终端反馈业务拒绝消息。
可选的,
所述向所述终端发送寻呼消息,触发所述终端发起与网络侧的交互流程, 包括: 向所述终端发送寻呼消息, 触发所述终端向当前归属的第一网络管理 实体发送业务请求消息,所述第一网络管理实体在收到所述业务请求消息后, 向所述终端反馈原因为负载均衡的拒绝消息, 触发所述终端发起向第二网络 管理实体的 TAU过程。
可选的,
所述确定所述终端的状态, 包括:
在所述终端发起的与所述网络侧的交互流程结束后, 所述网络侧确定所 述终端处于在线状态, 重启所述终端对应的可及性定时器。 本发明实施例还提供一种确定终端状态的方法, 其包括:
在终端的限制时间内, 当终端的周期性定时器到期时, 所述终端向其归 属的网络管理实体发起位置更新, 以使网络侧确定所述终端处于在线状态。
可选的,
所述限制时间包括退避时间或等待时间;
所述终端包括机器类通信(MTC )终端或非 MTC终端。
本发明实施例还提供一种确定终端状态的方法, 其包括:
网络侧延长终端对应的可及性定时器, 延长后的可及性定时器时间大于 等于所述终端限制时间的最大值;
所述终端如果在其周期性定时器到期之前触发位置更新失败, 则所述终 端在限制时间定时器到期时重新向网络侧发起位置更新过程, 以使所述网络 侧确定所述终端处于在线状态。
可选的,
所述限制时间包括退避时间或等待时间;
所述终端包括机器类通信(MTC )终端或非 MTC终端。
本发明实施例还提供一种确定终端状态的装置, 包括判断模块、 发送模 块以及状态确定模块, 其中:
所述判断模块设置为判断在终端对应的可及性定时器到期时是否接收到 所述终端发起的位置更新;
所述发送模块设置为在所述判断模块判断在终端对应的可及性定时器到 期时没有接收到所述终端发起的位置更新时, 向所述终端发送寻呼消息, 触 发所述终端发起与网络侧的交互流程;
所述状态确定模块设置为确定所述终端的状态。
可选的,
所述发送模块是设置为釆用以下方式向所述终端发送寻呼消息, 触发所 述终端发起与网络侧的交互流程: 向所述终端发送携带有跟踪区更新(TAU ) 指示的寻呼消息, 触发所述终端向当前归属的网络管理实体发起 TAU过程; 或者
所述发送模块是设置为釆用以下方式向所述终端发送寻呼消息, 触发所 述终端发起与网络侧的交互流程: 向所述终端发送寻呼消息, 触发所述终端 向当前归属的网络管理实体发送业务请求消息; 所述发送模块还用于在收到 终端发送的业务请求消息后, 向终端反馈业务拒绝消息; 或者
所述发送模块是设置为釆用以下方式向所述终端发送寻呼消息, 触发所 述终端发起与网络侧的交互流程: 向所述终端发送寻呼消息, 触发所述终端 向当前归属的第一网络管理实体发送业务请求消息; 所述发送模块还用于在 收到终端发送的业务请求消息后, 向终端反馈原因为负载均衡的拒绝消息, 触发所述终端发起向第二网络管理实体的 TAU过程。
可选的,
所述确定模块是设置为釆用以下方式确定所述终端的状态: 在所述终端 发起的与网络侧的交互流程结束后, 确定所述终端处于在线状态, 重启所述 终端对应的可及性定时器。
本发明实施例还提供一种确定终端状态的装置, 位于终端, 包括定时器 判断模块和发送模块, 其中:
所述定时器判断模块设置为判断在所述终端的限制时间内, 所述终端的 周期性定时器是否到期;
所述发送模块设置为在所述定时器判断模块判断在所述终端的限制时间 内所述终端的周期性定时器到期时, 向所述终端归属的网络管理实体发起位 置更新, 以使网络侧确定所述终端处于在线状态。
本发明实施例还提供一种确定终端状态的系统, 包括延长模块和发送模 块, 其中:
所述延长模块, 位于网络侧, 设置为延长终端对应的可及性定时器, 延 长后可及性定时器的时间大于等于所述终端限制时间的最大值;
所述发送模块, 位于终端侧, 设置为判断所述终端在其周期性定时器到 期之前触发位置更新失败, 则在限制时间定时器到期时重新向网络侧发起位 置更新过程, 以使所述网络侧确定所述终端处于在线状态。 釆用本发明实施例所述方法、 装置和系统, 网络侧可以及时获知 MTC 终端的状态, 不会错误地认为终端处于离线状态 (不可及) , 而删除终端的 移动性上下文。 附图概述
图 1为本发明实施例 1方案流程图;
图 2为本发明实施例 2方案流程图;
图 3为本发明实施例 3方案流程图;
图 4 为本发明实施例 4方案流程图;
图 5 为本发明实施例 5方案流程图。 本发明的较佳实施方式
退避时间和等待时间在本文中统称为限制时间。 对现有技术分析发现, 进入限制时间 MTC终端由于不能主动发起信令连接, 会造成 MTC终端暂时 与移动通信网失去联系。如果该限制时间的范围刚好覆盖了 MTC终端的周期 性定时器(periodical timer ) 的到达时间, 则当 MTC终端的周期性定时器到 达时, MTC终端不会发起 TAU过程, 造成的后果是 MME在针对该 MTC终 端的可及性定时器(reachable timer ) (该可及性定时器与 MTC终端上的周 期性定时器同步)到期时, 核心网不会收到 MTC终端发起的 TAU过程, 则 核心网将会认为该 MTC终端处于离线状态, 则会删除该 MTC终端的移动性 上下文。
确定终端状态的方法一:
网络侧判断在终端对应的可及性定时器到期时没有接收到终端发起的位 置更新, 则向终端发送寻呼消息, 触发终端发起与网络侧的交互流程, 确定 终端的状态。
上述向终端发送寻呼消息, 触发所述终端发起与网络侧的交互流程, 包 括以下任一种方式:
方式 1 向终端发送携带有跟踪区更新 (TAU )指示的寻呼消息, 触发终端向当 前归属的网络管理实体发起 TAU过程。 具体参见实施例 1。
方式 2
向终端发送寻呼消息, 触发终端向当前归属的网络管理实体发送业务请 求消息; 网络管理实体在收到该业务请求消息后, 向终端反馈业务拒绝消息。 具体参见实施例 2。
方式 3
向终端发送寻呼消息, 触发终端向当前归属的第一网络管理实体发送业 务请求消息, 第一网络管理实体在收到业务请求消息后, 向终端反馈原因为 负载均衡的拒绝消息, 触发终端发起向第二网络管理实体的 TAU过程。 具体 参见实施例 3。
实现该方法的装置包括判断模块、 发送模块以及状态确定模块, 其中: 该判断模块, 设置为判断在终端对应的可及性定时器到期时是否接收到 终端发起的位置更新;
该发送模块, 设置为在该判断模块判断在终端对应的可及性定时器到期 时没有接收到终端发起的位置更新时, 向该终端发送寻呼消息, 触发该终端 发起与网络侧的交互流程;
该状态确定模块, 设置为确定该终端的状态。
所述发送模块设置为釆用以下方式向所述终端发送寻呼消息, 触发所述 终端发起与网络侧的交互流程: 向所述终端发送携带有跟踪区更新 (TAU ) 指示的寻呼消息, 触发所述终端向当前归属的网络管理实体发起 TAU过程; 或者
所述发送模块设置为釆用以下方式向所述终端发送寻呼消息, 触发所述 终端发起与网络侧的交互流程: 向所述终端发送寻呼消息, 触发所述终端向 当前归属的网络管理实体发送业务请求消息; 所述发送模块还用于在收到终 端发送的业务请求消息后, 向终端反馈业务拒绝消息; 或者
所述发送模块设置为釆用以下方式向所述终端发送寻呼消息, 触发所述 终端发起与网络侧的交互流程: 向所述终端发送寻呼消息, 触发所述终端向 当前归属的第一网络管理实体发送业务请求消息; 所述发送模块还设置为在 收到终端发送的业务请求消息后, 向终端反馈原因为负载均衡的拒绝消息, 触发所述终端发起向第二网络管理实体的 TAU过程。
>确定终端状态的方法二:
在终端的限制时间内, 当终端的周期性定时器到期时, 该终端向其归属 的网络管理实体发起位置更新, 以使网络侧确定该终端处于在线状态。 具体 参见实施例 4。
实现该方法的装置位于终端, 包括定时器判断模块和发送模块, 其中: 该定时器判断模块, 设置为判断在该终端的限制时间内, 该终端的周期 性定时器是否到期;
该发送模块, 设置为在该定时器判断模块判断在终端的限制时间内终端 的周期性定时器到期时, 向该终端归属的网络管理实体发起位置更新, 以使 网络侧确定该终端处于在线状态。
确定终端状态的方法三:
网络侧延长终端对应的可及性定时器, 延长后的时间大于等于所述终端 限制时间的最大值;
该终端如果在终端的周期性定时器到期之前触发位置更新失败(终端的 周期性定时器并未随可及性定时器延长, 仍保持不变) , 则该终端在限制时 间定时器到期时重新向网络侧发起位置更新过程, 以使该网络侧确定所述终 端处于在线状态。 具体参见实施例 5。
实现该方法的系统包括延长模块和发送模块, 其中:
该延长模块, 位于网络侧, 设置为延长终端对应的可及性定时器, 延长 后的时间大于等于该终端限制时间的最大值;
该发送模块, 位于终端侧, 设置为判断该终端在其周期性定时器到期之 前触发位置更新失败, 则在限制时间定时器到期时重新向网络侧发起位置更 新过程, 以使网络侧确定该终端处于在线状态。
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 1所示, 包括:
步骤 101 : MME发现 MTC终端的可及性定时器到期,但仍未收到该 MTC 终端发起的跟踪区更新(Tracking Area Update, 简称 TAU ) , 执行步骤 102; 步骤 102: MME发送携带有 TAU指示的寻呼消息 ( paging with TAU ) 给 MTC终端;
步骤 103: MTC终端收到该带有 TAU的寻呼消息后, 发起跟踪区更新, 与 MME和 HSS ( Home subscription Server, 归属用户服务器)进行跟踪区更 新 (TAU )过程;
步骤 104: 跟踪区更新成功, MTC终端重启周期性定时器;
步骤 105: 跟踪区更新成功, MME重启可及性定时器。
在本实施例中,如果跟踪区更新过程成功,则核心网(本实施例为 MME ) 获知该 MTC终端仍然处于在线状态,不会删除该 MTC终端的移动性上下文。
实施例 2
如图 2所示, 包括:
步骤 201 : MME发现 MTC终端的可及性定时器到期,但仍未收到该 MTC 终端发起的跟踪区更新, 执行步骤 202;
步骤 202: MME发送寻呼(paging ) 消息给 MTC终端;
步骤 203: MTC终端收到 paging消息后,发送业务请求( Service Request ) 消息给 MME;
此时 MTC终端发送的业务请求消息为空的业务请求消息, MTC终端通 过该业务请求消息与 MME建立信令链接。
步骤 204: MME向 MTC终端发送业务拒绝( Service Reject ) 消息; 步骤 205: MTC终端重启周期性定时器;
步骤 206: MME重启可及性定时器。
在本实施例中, MME通过主动向 MTC终端发送寻呼消息, 可使 MTC 终端主动向 MME发送业务请求,从而使核心网获知该 MTC终端仍然处于在 线状态, 不会删除该 MTC终端的移动性上下文。
实施例 3
如图 3所示, 包括:
步骤 301: MME1 发现 MTC终端的可及性定时器到期, 但仍未收到该 MTC终端发起的跟踪区更新, 执行步骤 302;
步骤 302: MME1发送寻呼消息给 MTC终端;
步骤 303: MTC终端收到寻呼消息后, 发送业务请求给 MME;
步骤 304: MME1向 MTC终端发送原因为负载均衡的拒绝消息( Service Reject with loadbalance TAU require ) ;
MMEl可通过上述寻呼消息使 MTC终端切换到其他 MME上。
步骤 305: MTC终端发起跟踪区更新,与 MME2和 HSS进行 TAU过程; 步骤 306: MTC终端重启周期性定时器;
步骤 307: MME2重启可及性定时器。
通过本实施例, MME1通过主动向 MTC终端发送寻呼消息, 使 MTC终 端向 MME1发送业务请求, 向 MME2发送位置更新请求,从而使核心网(本 实施例为 MME2 )获知该 MTC终端仍然处于在线状态, 不会删除该 MTC终 端的移动性上下文。 实施例 4
如图 4所示, 包括:
步骤 401 : MTC终端进入信令的退避时间;
步骤 402: 在退避时间内, MTC终端的周期性定时器到期, MTC终端发 起 TAU过程 , 与 MME和 HSS进行 TAU过程;
步骤 403: MTC终端重启周期性定时器;
步骤 404: MME重启可及性定时器。
在本实施例中, 规定 MTC终端可以在限制时间内发起 TAU过程, 使核 心网及时获知该 MTC终端仍然处于在线状态, 从而不会删除该 MTC终端的 移动性上下文。
实施例 5
如图 5所示, 包括:
步骤 501 : MME延长处于限制时间 (退避时间或等待时间 ) 内的 MTC 终端的可及性定时器, 延长后的时间大于等于该 MTC终端限制时间的最大 值;
步骤 502: MTC终端的周期性定时器到期时不触发 TAU过程, 并记录 TAU发起失败(例如通过计数器) ;
步骤 503: MTC终端的限制时间定时器到期, MTC终端判断有 TAU发 起失败的记录, 则重新发起 TAU过程, 与 MME和 HSS进行 TAU过程; 步骤 504: MTC终端重启周期性定时器;
步骤 505: MME重启可及性定时器。
在本实施例中, 通过延长 MME的可及性定时器, 延迟其判定终端状态 的时间, 从而使网络侧获取 MTC终端正确的状态, 避免误删该 MTC终端的 移动性上下文。 上述各实施例也适用于处于 ACB 的退避时间和收到 RRC Connection Release ( RRC连接释放) 消息处于等待时间的非 MTC终端。
上述实施例仅以网络管理实体为 MME为例进行说明, 在 2G和 3G网络 中, 还有其他相应的网络管理实体, 例如 2G中的 MSC (移动交换中心 ) , 3G中的 SGSN (服务 GPRS支持节点)等。
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 釆用本发明实施例所述方法、 装置和系统, 网络侧可以及时获知 MTC 终端的状态, 不会错误地认为终端处于离线状态 (不可及) , 而删除终端的 移动性上下文。

Claims

1、 一种确定终端状态的方法, 其包括:
网络侧判断在终端对应的可及性定时器到期时没有接收到所述终端发起 的位置更新, 则向所述终端发送寻呼消息, 触发所述终端发起与所述网络侧 的交互流程, 确定所述终端的状态。
2、 如权利要求 1所述的方法, 其中:
所述向所述终端发送寻呼消息,触发所述终端发起与网络侧的交互流程, 包括: 向所述终端发送携带有跟踪区更新 (TAU )指示的寻呼消息, 触发所 述终端向当前归属的网络管理实体发起 TAU过程。
3、 如权利要求 1所述的方法, 其中:
所述向所述终端发送寻呼消息,触发所述终端发起与网络侧的交互流程, 包括: 向所述终端发送寻呼消息, 触发所述终端向当前归属的网络管理实体 发送业务请求消息;
所述方法还包括: 所述网络管理实体在收到所述业务请求消息后, 向所 述终端反馈业务拒绝消息。
4、 如权利要求 1所述的方法, 其中:
所述向所述终端发送寻呼消息,触发所述终端发起与网络侧的交互流程, 包括: 向所述终端发送寻呼消息, 触发所述终端向当前归属的第一网络管理 实体发送业务请求消息,所述第一网络管理实体在收到所述业务请求消息后, 向所述终端反馈原因为负载均衡的拒绝消息, 触发所述终端发起向第二网络 管理实体的 TAU过程。
5、 如权利要求 1-4中任一权利要求所述的方法, 其中:
所述确定所述终端的状态, 包括:
在所述终端发起的与所述网络侧的交互流程结束后, 所述网络侧确定所 述终端处于在线状态, 重启所述终端对应的可及性定时器。
6、 一种确定终端状态的方法, 其包括:
在终端的限制时间内, 当终端的周期性定时器到期时, 所述终端向其归 属的网络管理实体发起位置更新, 以使网络侧确定所述终端处于在线状态。
7、 如权利要求 6所述的方法, 其中:
所述限制时间包括退避时间或等待时间;
所述终端包括机器类通信(MTC )终端或非 MTC终端。
8、 一种确定终端状态的方法, 其包括:
网络侧延长终端对应的可及性定时器, 延长后的可及性定时器时间大于 等于所述终端限制时间的最大值;
所述终端如果在其周期性定时器到期之前触发位置更新失败, 则所述终 端在限制时间定时器到期时重新向网络侧发起位置更新过程, 以使所述网络 侧确定所述终端处于在线状态。
9、 如权利要求 8所述的方法, 其中:
所述限制时间包括退避时间或等待时间;
所述终端包括机器类通信(MTC )终端或非 MTC终端。
10、 一种确定终端状态的装置, 包括判断模块、 发送模块以及状态确定 模块, 其中:
所述判断模块设置为判断在终端对应的可及性定时器到期时是否接收到 所述终端发起的位置更新;
所述发送模块设置为在所述判断模块判断在终端对应的可及性定时器到 期时没有接收到所述终端发起的位置更新时, 向所述终端发送寻呼消息, 触 发所述终端发起与网络侧的交互流程;
所述状态确定模块设置为确定所述终端的状态。
11、 如权利要求 10所述的装置, 其中:
所述发送模块是设置为釆用以下方式向所述终端发送寻呼消息, 触发所 述终端发起与网络侧的交互流程: 向所述终端发送携带有跟踪区更新(TAU ) 指示的寻呼消息, 触发所述终端向当前归属的网络管理实体发起 TAU过程; 或者
所述发送模块是设置为釆用以下方式向所述终端发送寻呼消息, 触发所 述终端发起与网络侧的交互流程: 向所述终端发送寻呼消息, 触发所述终端 向当前归属的网络管理实体发送业务请求消息; 所述发送模块还用于在收到 终端发送的业务请求消息后, 向终端反馈业务拒绝消息; 或者
所述发送模块是设置为釆用以下方式向所述终端发送寻呼消息, 触发所 述终端发起与网络侧的交互流程: 向所述终端发送寻呼消息, 触发所述终端 向当前归属的第一网络管理实体发送业务请求消息; 所述发送模块还用于在 收到终端发送的业务请求消息后, 向终端反馈原因为负载均衡的拒绝消息, 触发所述终端发起向第二网络管理实体的 TAU过程。
12、 如权利要求 10或 11所述的装置, 其中:
所述确定模块是设置为釆用以下方式确定所述终端的状态: 在所述终端 发起的与网络侧的交互流程结束后, 确定所述终端处于在线状态, 重启所述 终端对应的可及性定时器。
13、 一种确定终端状态的装置, 位于终端, 包括定时器判断模块和发送 模块, 其中:
所述定时器判断模块设置为判断在所述终端的限制时间内, 所述终端的 周期性定时器是否到期;
所述发送模块设置为在所述定时器判断模块判断在所述终端的限制时间 内所述终端的周期性定时器到期时, 向所述终端归属的网络管理实体发起位 置更新, 以使网络侧确定所述终端处于在线状态。
14、 一种确定终端状态的系统, 包括延长模块和发送模块, 其中: 所述延长模块, 位于网络侧, 设置为延长终端对应的可及性定时器, 延 长后可及性定时器的时间大于等于所述终端限制时间的最大值;
所述发送模块, 位于终端侧, 设置为判断所述终端在其周期性定时器到 期之前触发位置更新失败, 则在限制时间定时器到期时重新向网络侧发起位 置更新过程, 以使所述网络侧确定所述终端处于在线状态。
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