WO2012129853A1 - 一种检测机器类型通信终端移动性状态的方法和系统 - Google Patents

一种检测机器类型通信终端移动性状态的方法和系统 Download PDF

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Publication number
WO2012129853A1
WO2012129853A1 PCT/CN2011/076081 CN2011076081W WO2012129853A1 WO 2012129853 A1 WO2012129853 A1 WO 2012129853A1 CN 2011076081 W CN2011076081 W CN 2011076081W WO 2012129853 A1 WO2012129853 A1 WO 2012129853A1
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Prior art keywords
mtc terminal
mme
state detection
mtc
terminal
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PCT/CN2011/076081
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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 WO2012129853A1 publication Critical patent/WO2012129853A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • H04W64/006—Locating users or terminals or network equipment for network management purposes, e.g. mobility management with additional information processing, e.g. for direction or speed determination

Definitions

  • the present invention relates to a management technique for a machine type communication terminal, and more particularly to a method and system for detecting a mobility state of a machine type communication terminal.
  • Machine type communication (MTC) service refers to a technology that does not require human control during the implementation of the service, and all communication is performed autonomously by the machine.
  • the MTC service is usually applied in the technical fields of logistics monitoring, security monitoring, telemedicine detection, remote meter reading, and the like.
  • the service data is obtained by sensing the state or operation of the terminal by using a sensor or the like, and then the data is reported to the mobile communication network through the communication module, and is accessed to the public data network through the mobile communication network, and the data is used by the mobile operator or
  • the MTC operator's application server is managed and can be viewed by MTC users or MTC managers.
  • a terminal that obtains service data through a sensor is generally referred to as an MTC terminal.
  • the cellular wireless communication system includes a core network 11 (Core Network, CN), an access network 12 (Radio Access Network, RAN), and a terminal 13.
  • the core network 11 is responsible for non-access layer transactions, such as: terminal location update, etc., and is an anchor point of the user plane.
  • the access network 12 includes a plurality of base stations 14 or base stations and their control nodes.
  • the access network 12 is responsible for access layer transactions, for example, management of radio resources, and physical or logical connections may exist between the base stations 14 according to actual conditions.
  • the terminal 13 (User Equipment, UE) refers to various terminals that can be connected to the base station 14, such as a mobile phone or a notebook computer.
  • the application mode of the MTC terminal is different from that of the ordinary terminal.
  • the MTC terminal may be placed in a fixed place or moved only in a certain range, for example. : Remote meters, vending machines, etc. In these cases, the MTC user needs the network to monitor the location characteristics of these MTC terminals. If the terminal is suddenly moved or moved out of a limited range, it indicates that the terminal may be faulty or stolen. Take measures.
  • the network needs to store the location information as subscription data in the Home Subscriber Server (HSS) when the MTC user signs up for the network.
  • HSS Home Subscriber Server
  • the HSS is an entity in a telecommunication network that is responsible for storing identity information, authentication information, and authorization information of a user or a terminal.
  • the HSS can be used to store the user's identity information and the binding information of the user and the terminal, or only the identity information of the user.
  • the gateway saves the binding information of the user and the terminal, or the HSS directly saves the identity information of the terminal.
  • the HSS is further responsible for the user's subscription database, as well as performing user authentication and authorization.
  • only the location monitoring event is proposed in the HSS, but there is no corresponding functional unit in the network system to implement the judgment and monitoring of the mobility state of the MTC terminal. Summary of the invention
  • the main object of the present invention is to provide a method and system for detecting the mobility state of an MTC terminal, which can determine and monitor the mobility state of the MTC terminal through a Mobility Management Entity (MME).
  • MME Mobility Management Entity
  • the present invention provides a method for detecting a mobility state of an MTC terminal, the method comprising:
  • the MME saves the mobility state detection parameter of the MTC terminal
  • the MME When the MME performs attachment, or performs tracking area update, or the low mobility characteristic is activated, the MME starts timing and counts the cell switching or tracking area update of the MTC terminal. If the preset time limit is reached, the counting does not reach the gate. If the limit is reached, the counting and counting operations are restarted. If the counting reaches the threshold within the preset state detecting time limit, the MME is directed to the MTC terminal. The motion status is alarmed.
  • the mobility state detection parameter of the MTC terminal includes: a state detection time limit and a state detection count threshold parameter preset for the MTC terminal; or a state detection time limit and a state detection count threshold parameter preset for the MTC terminal, and The specified range of movement of the MTC terminal.
  • the method further includes:
  • the MME determines whether it is still within the specified range according to the mobility state detection parameter of the MTC terminal. If yes, the counting operation is not performed, otherwise the counting operation is performed.
  • the MME saves the mobility state detection parameter of the MTC terminal, including: the mobility state detection parameter of the MTC terminal is preset and saved as the MME local parameter; or the mobility state detection of the MTC terminal is obtained from the home subscriber server (HSS) Parameters and save.
  • HSS home subscriber server
  • the timing starts including:
  • the timing starts; or the MTC user applies to the operator to activate the low mobility feature of the MTC terminal, the operator first modifies the HSS subscription data, and the MTC user's MTC The timing is started after the low mobility feature in the terminal subscription information is set to the active state.
  • the MME performs an alarm for the motion status of the MTC terminal, including: the MME locally saves the alarm information, and/or the MME sends the alarm information to the MTC server, and/or the HSS, and/or the gateway.
  • the present invention also provides a system for detecting a mobility state of an MTC terminal, where the system includes: an MME and an MTC terminal, where The MME is configured to save a mobility state detection parameter of the MTC terminal, start timing, and perform cell handover or tracking area update of the MTC terminal when the MTC terminal performs attach, or performs tracking area update, or the low mobility characteristic is activated. If the preset operation time limit is reached and the count does not reach the threshold value, the timing and counting operations are restarted. If the count reaches the threshold within the preset state detection time limit, the motion state of the MTC terminal is alarmed. .
  • the mobility state detection parameter of the MTC terminal includes: a state detection time limit and a state detection count threshold parameter preset for the MTC terminal; or a state detection time limit and a state detection count threshold parameter preset for the MTC terminal, and The specified range of movement of the MTC terminal.
  • the MME is further configured to: after the cell handover or the tracking area is updated, determine whether the location is still within the specified range according to the mobility state detection parameter of the MTC terminal, and if yes, do not perform the counting operation; otherwise, perform the counting operation.
  • the system further includes an HSS, where the HSS is configured to provide a mobility state detection parameter of the MTC terminal for the MME.
  • the MME saves the mobility state detection parameter of the MTC terminal; when the MME performs attachment, or performs tracking area update, or the low mobility characteristic is activated, the MME performs activation, Start timing and count the cell switching or tracking area update of the MTC terminal. If the preset time limit is reached and the count does not reach the threshold, the timing and counting operations are restarted. If the counting is reached within the preset state detection time limit. For the threshold, the MME alerts the motion state of the MTC terminal.
  • the MME can implement the judgment and monitoring of the mobility state of the MTC terminal, and further provide an alarm, so that the security of the MTC terminal is improved, and the architecture of the existing network can be compatible, and the cost is not required to be performed.
  • the transformation of the system architecture has high practicability.
  • FIG. 1 is a schematic structural diagram of a cellular wireless communication system
  • 2 is a schematic flowchart of a method for detecting a mobility state of an MTC terminal according to the present invention
  • FIG. 3 is a schematic structural diagram of a system for detecting a mobility state of an MTC terminal according to the present invention.
  • the basic idea of the present invention is: the mobility state detection parameter of the MTC terminal is saved by the MME; the MME starts timing and performs cell handover of the MTC terminal when the MTC terminal performs attachment, or performs tracking area update, or the low mobility characteristic is activated. Or the tracking area is updated to perform the counting operation. If the preset time limit is reached and the counting does not reach the threshold, the timing and counting operations are restarted. If the counting reaches the threshold within the preset state detection time limit, the MME is directed to the MTC terminal. The motion status is alarmed.
  • FIG. 2 is a schematic flowchart of a method for detecting a mobility state of an MTC terminal according to the present invention. As shown in FIG. 2, the method includes:
  • Step 201 The MME saves a mobility state detection parameter of the MTC terminal.
  • the mobility state detection parameter of the MTC terminal includes: a state detection time limit and a state detection count threshold parameter preset for the MTC terminal. Further, when monitoring the MTC terminal that is allowed to move within the specified range, the mobility state detection parameter further includes: a specified range that allows the MTC terminal to move. The specified range is defined by a cell identifier carried in the mobility state detection parameter.
  • the manner in which the MME saves the mobility state detection parameter of the MTC terminal includes: presetting and saving the mobility state detection parameter of the MTC terminal as the MME local parameter, or acquiring the mobility of the MTC terminal from the home subscriber server (HSS) Status detection parameters are saved.
  • the acquiring the mobility state detection parameter of the MTC terminal from the HSS includes: sending, by the MME, update location request information to the HSS, where the international mobile subscriber carrying the MTC terminal in the request information identifies the International Mobile Subscriber Identification Number , IMSI), the HSS queries its contract data according to the IMSI identifier, and the mobility status in the subscription data
  • the detection parameters are sent to ⁇ by updating the location response message.
  • Step 202 When the MTC terminal performs attaching, or performs tracking area update, or the low mobility characteristic is activated, start timing and perform a counting operation on the cell switching or tracking area update of the MTC terminal. If the preset time limit is reached, the counting is performed. If the threshold is not reached, the timer and the counting operation are restarted. If the threshold is reached within the preset state detection time limit, step 203 is performed.
  • the cell handover includes: inter-base station handover or inter-base handover. .
  • starting timing includes: starting timing after receiving the attach request signaling of the MTC terminal, or the tracking area update request signaling
  • the time may be started after the transmission of the attach and receive signaling or the tracking area update and the receiving of the signaling; further, the MTC user may apply to the operator to activate the low mobility feature of the MTC terminal, and the operator first modifies the HSS subscription data, and The low mobility characteristic of the MTC terminal subscription information of the MTC user is set to an active state, and then the HSS sends the insertion data signaling to the ⁇ , and starts the timing after the low mobility characteristic of the MTC terminal is the activated state.
  • the counting operation is performed on the cell switching or the tracking area update of the MTC terminal, specifically: starting the timer and starting the counter at the same time, if the setting startup value is 0, after the MTC terminal performs the cell switching or the tracking area update, The counter is incremented by one. If the count reaches the threshold within the preset state detection time limit, step 203 is performed; another implementation manner may set the startup value to the state detection count threshold, and perform cell handover or tracking area update at the MTC terminal. Thereafter, the counter is decremented by one, and if the counter value is reduced to 0 within the preset state detection time limit, step 203 is performed. In practical applications, it is possible to implement a counting operation by adding a timer as a state detection timer in ⁇ , and adding a counter as a state detection counter in ⁇ to implement the counting operation.
  • the source device in the process of counting, if the movement of the MTC terminal causes the execution management to switch, the source device also needs to send the mobility state detection parameter of the MTC terminal, and the current timing and counting parameters together. Continue timing and counting operations for new ones. Further, in the process of monitoring the MTC terminal that is allowed to move within the specified range, after the cell handover or the tracking area update, the MME determines, according to the mobility state detection parameter of the MTC terminal, whether it is still within the specified range, and if so, No counting operation is performed, otherwise the counting operation is performed.
  • Step 203 The MME performs an alarm for the motion state of the MTC terminal.
  • the manner of the alarm includes: the MME locally saves the alarm information, and/or the MME sends the alarm information to the MTC server, and/or the HSS, and/or the gateway.
  • the alarm information is used to indicate the motion state of the MTC terminal, that is, the mobility state does not match the subscription status.
  • FIG. 3 is a schematic structural diagram of a system for detecting a mobility state of an MTC terminal according to the present invention. As shown in FIG. 3, the system includes: an MME 31 and an MTC terminal 32, where
  • the MME 31 is configured to save the mobility state detection parameter of the MTC terminal 32, start timing and switch the cell of the MTC terminal 32 when the MTC terminal 32 performs the attach, or performs the tracking area update, or the low mobility characteristic is activated.
  • the tracking area is updated to perform the counting operation. If the preset time limit is reached and the counting does not reach the threshold, the counting and counting operations are restarted. If the counting reaches the threshold within the preset state detecting time limit, the MTC terminal 32 is The motion status is alarmed.
  • the mobility state detection parameter of the MTC terminal 32 includes: a state detection time limit and a state detection count threshold parameter preset for the MTC terminal 32. Further, when monitoring the MTC terminal 32 that is allowed to move within the specified range, the mobility state detection parameter further includes: a specified range that allows the MTC terminal 32 to move. The specified range is defined by the identifier of the carried cell in the mobility state detection parameter.
  • the manner in which the MME 31 saves the mobility state detection parameter of the MTC terminal 32 includes: the mobility state detection parameter of the MTC terminal 32 is preset and saved as the local parameter of the MME 31, or the mobility state detection parameter of the MTC terminal is acquired from the HSS 33. And save.
  • the MME 31 acquires the mobility state detection parameter of the MTC terminal from the HSS 33 in the system The HSS 33 is further included, and the HSS 33 is configured to provide the MME 31 with mobility state detection parameters of the MTC terminal.
  • the acquiring, by the MME 31, the mobility state detection parameter of the MTC terminal includes: sending, by the MME 31, the update location request information to the HSS 33, carrying the IMSI identifier of the MTC terminal 32 in the request information, and the HSS 33 querying the subscription data according to the IMSI identifier. And transmitting the mobility state detection parameter in the subscription data to the MME 31 by updating the location response message.
  • the cell handover includes: inter-base station handover or MME 31 handover.
  • the start timer starts timing, including: receiving the attach request signaling of the MTC terminal 32 or the tracking area update request at the MME 31. After the signaling is started, the timer starts to be started; the MME 31 may start to start the timer after sending the attachment acceptance signaling or the tracking area update acceptance signaling; and further, the MTC user may apply to the operator to activate the low mobility of the MTC terminal 32.
  • the operator first modifies the HSS33 subscription data, sets the low mobility characteristic of the MTC terminal 32 subscription information of the MTC user to the active state, and then the HSS 33 sends the insertion data signaling to the MME 31, and the low mobility characteristic of the MTC terminal 32 is adopted.
  • the timer is started after the activation state is started.
  • the start timing and counting operation of the cell switching or tracking area update of the MTC terminal 32 are specifically as follows: starting the timer and starting the counter at the same time, if the setting start value is 0, performing cell switching or tracking area update at the MTC terminal 32. Thereafter, the counter is incremented by one. If the count reaches the threshold within the preset state detection time limit, the MME 31 alerts the motion state of the MTC terminal 32; another implementation may set the startup value to the state detection count threshold. After the MTC terminal 32 performs the cell handover or the tracking area update, the counter is decremented by 1. If the counter value is reduced to 0 within the preset state detection time limit, the MME 31 issues an alarm for the motion state of the MTC terminal 32.
  • a timing operation can be implemented by adding a timer as a state detection timer in the MME 31, and a counter is added as a state detection counter in the MME 31 to implement a counting operation. Further, in the process of counting, if the movement of the MTC terminal 32 causes the MME 31 that performs management to switch, the source MME 31 needs to detect the mobility state detection parameter of the MTC terminal 32, and the current timing and counting parameters. Together with the new MME 31, the timing and counting operations are continued.
  • the MME 31 determines, according to the mobility state detection parameter of the MTC terminal 32, whether it is still within the specified range, if , the counting operation is not performed, otherwise the counting operation is performed.
  • the manner of the alarm includes: the MME 31 locally saves the alarm information, and/or the MME 31 sends the alarm information to the MTC server, and/or the HSS 33, and/or the gateway.
  • the alarm information is used to indicate the motion state of the MTC terminal 32, that is, the mobility state does not match the subscription status.
  • the mobility state detection parameter of the MTC terminal is saved as the subscription information in the HSS, and the timer and the counter are started after the MME sends the attachment acceptance signaling:
  • Step 1 The MTC terminal sends an attach request or a tracking area update request to the MME.
  • Step 2 After receiving the attach request or the tracking area update request of the terminal, the MME checks whether the subscription data of the MTC terminal is saved locally, and if not, sends the update location request information to the HSS, where the information includes the identifier IMSI of the terminal. Indicates that the subscription data of the terminal needs to be requested;
  • Step 3 After receiving the update location request information sent by the MME, the HSS queries the subscription data according to the identifier IMSI of the terminal in the message, and if the subscription data of the terminal is included, the update is performed. The location response message is sent to the MME;
  • the transmitted subscription data includes a low mobility detection status parameter of the terminal subscription. This includes the status detection time limit and the status detection count threshold parameter.
  • Step 4 After receiving the terminal subscription data sent by the HSS, the MME constructs the terminal context information locally according to the received subscription data, and saves the state detection time limit and the state detection count gate. Limit parameter
  • Step 5 After completing the authentication of the terminal, the MME sends an attach accept signaling or a tracking area update accepting signaling to the MTC terminal, and starts a state detecting timer and a state detecting counter.
  • the initial value of the status detection counter is set to zero.
  • Step 6 the MTC terminal moves to a new cell during the mobile process, sends a measurement report to the base station, and requests to perform the handover;
  • Step 7 After receiving the handover request of the MTC terminal, the base station selects, as the target cell, the cell with the best signal quality for the MTC terminal according to the measurement report.
  • Step 8 After the handover is successful, if the target cell is still connected to the same MME as the source cell, the MME adds 1 to the state detection counter value. If the target cell is connected to the MME different from the source cell, the MME will The context information of the MTC terminal is sent to the target MME of the new 'J, the area;
  • the context information of the MTC terminal should include the value of the remaining time of the state detection timer, and the current value of the state detection counter.
  • the context information of the MTC terminal may also include an initial value of the state detection timer and a state detection count threshold.
  • Step 9 the target MME locally starts the state detection timer and the state detection counter, and continues to count according to the current value of the state detection timer sent by the source MME, and increases the state detection counter value by 1 according to the current value of the state detection counter;
  • Step 10 If the value of the state detection counter reaches the state detection threshold, the MME sends an alarm event report to the MTC server.
  • the alarm event report indicates that the motion state of the terminal does not match the subscription status.
  • the mobility state detection parameter of the MTC terminal is saved in the MME as the subscription information, and the timer and the counter are started after the MME receives the attachment request:
  • Step 1 The MTC terminal sends an attach request or a location update request to the MME.
  • Step 2 After receiving the attach request or location update request of the terminal, the MME is the MTC. a terminal startup state detection timer and a state detection counter;
  • the state detection timer is set to a locally saved state detection threshold
  • the state detection counter is set to a locally saved state detection count threshold
  • Step 3 The MTC terminal moves to the new cell during the mobile process, and reads the tracking area identifier in the system message of the new cell, and compares the locally saved tracking area identifier to find that the two do not match, the terminal sends a tracking area update request to New MME;
  • Step 4 After receiving the tracking area update request of the terminal, the new MME obtains the context information of the MTC terminal from the source MME where the terminal is located.
  • the context information of the MTC terminal should include the value of the remaining time of the state detection timer, and the current value of the state detection counter.
  • Step 5 After the tracking area is successfully updated, the new MME continues to run the state detection timer, and the state detection counter value is decreased by 1;
  • Step 6 If the value of the status detection counter reaches 0, the MME sends an alarm event report to the MTC server.
  • the alarm event report indicates that the motion state of the terminal does not match the subscription status.
  • the mobility state detection parameter of the MTC terminal is saved in the MME as subscription information, and the timer and the counter are started when the low mobility feature is activated:
  • Step 1 The MTC user applies to the operator for the low mobility feature of the activated MTC terminal. Specifically, in practical applications, if the low mobility feature is used, the operator can provide a lower usage rate.
  • Step 2 The operator modifies the HSS subscription data, and sets the low mobility feature in the MTC terminal subscription information of the MTC user to an active state.
  • Step 3 The HSS sends the insert data signaling to the MME, and sets the low mobility characteristic of the MTC terminal in the MME to an active state.
  • Step 4 After receiving the signaling of the HSS, the MME determines the startup state of the MTC terminal. Timer and status detection counters. The status detection timer is set to the initial value saved locally, and the status detection counter is set to 0;
  • Step 5 The MTC terminal moves to the new cell during the mobile process, and reads the tracking area identifier in the system message of the new cell, and compares the locally saved tracking area identifier to find that the two do not match, and the MTC terminal sends the tracking area update request.
  • the MTC terminal moves to the new cell during the mobile process, and reads the tracking area identifier in the system message of the new cell, and compares the locally saved tracking area identifier to find that the two do not match, and the MTC terminal sends the tracking area update request.
  • Step 6 After receiving the tracking area update request of the terminal, the new MME obtains the context information of the MTC terminal from the source MME where the MTC terminal is located first;
  • the context information of the MTC terminal should include the value of the remaining time of the state detection timer, and the current value of the state detection counter.
  • Step 7 After the tracking area is successfully updated, the new MME continues to run the state detection timer, and adds the state detection counter value to 1;
  • Step 8 If the value of the status detection counter reaches the status detection threshold, the MME sends an alarm event report to the MTC server.
  • the alarm event report indicates that the motion state of the terminal does not match the subscription status.
  • the MTC terminal is allowed to move within the specified range, and the mobility state detection parameter of the MTC terminal is saved as the subscription information in the HSS:
  • Step 1 The MTC terminal sends an attach request or a tracking area update request to the MME.
  • Step 2 After receiving the attach request or the tracking area update request of the MTC terminal, the MME checks whether there is subscription data of the terminal locally, and if not, sends the update location request information to the HSS, where the information includes the identifier IMSI of the terminal. Indicates that the subscription data of the MTC terminal needs to be requested;
  • Step 3 After receiving the update location request information sent by the MME, the HSS queries the subscription data according to the identifier IMSI of the terminal in the message, and if the subscription data of the MTC terminal is included, the HSS sends the location response message to the MME.
  • the low mobility detection flag including the MTC terminal subscription is included.
  • State parameters This includes the status detection time limit and the status detection count threshold parameter.
  • Step 4 After receiving the terminal subscription data sent by the HSS, the MME constructs the terminal context information locally according to the received subscription data, and saves the state detection time limit and the state detection count threshold parameter.
  • Step 5 After completing the authentication of the terminal, the MME sends an attach accept signaling or a tracking area update accepting signaling to the MTC terminal, and starts a state detecting timer and a state detecting counter.
  • the initial value of the status detection counter is set to zero.
  • Step 6 the MTC terminal moves to a new cell during the mobile process, sends a measurement report to the base station, and requests to perform the handover;
  • Step 7 After receiving the handover request of the MTC terminal, the base station selects, as the target cell, the cell with the best signal quality for the MTC terminal according to the measurement report.
  • Step 8 After the handover of the MTC terminal is successfully performed, the MME detects whether the MTC terminal is within the allowed specified range. If the MTC terminal is within the allowed specified range, the MME does not perform counting. If the MTC terminal moves outside the allowed specified range, The status detection counter is incremented by 1;
  • the MTC terminal moves outside the allowed specified range, including moving from the allowed moving range, moving back to the allowed moving range, or moving from the allowed moving range to the allowed moving range, or within the allowed specified range. Move between outside cells.
  • Step 9 If the value of the status detection counter reaches the status detection threshold, the MME sends an alarm event report to the MTC server.
  • the alarm event report indicates that the motion state of the terminal does not match the subscription status.
  • the MTC terminal is allowed to move within the specified range, and the mobility state detection parameter of the MTC terminal is saved in the HSS as the subscription information, and the mobility is determined by the tracking area update: Step 1: The MTC terminal sends an attach request or a tracking area update request. To the MME;
  • Step 2 After receiving the attach request or the tracking area update request of the terminal, the MME checks whether there is subscription data of the terminal locally, and if not, sends the update location request information to the HSS.
  • the information includes the identifier IMSI of the terminal, indicating that the subscription data of the terminal needs to be requested;
  • Step 3 After receiving the update location request information sent by the MME, the HSS queries the subscription data according to the identifier IMSI of the MTC terminal in the message, if The subscription data including the MTC terminal is sent to the MME by updating the location response message;
  • the transmitted subscription data includes a low mobility detection status parameter of the terminal subscription. This includes the status detection time limit and the status detection count threshold parameter.
  • Step 4 After receiving the terminal subscription data sent by the HSS, the MME constructs the terminal context information locally according to the received subscription data, and saves the state detection time limit and the state detection count threshold parameter.
  • Step 5 After completing the authentication of the terminal, the MME sends an attach accept signaling or a tracking area update accepting signaling to the MTC terminal, and starts a state detecting timer and a state detecting counter.
  • the initial value of the state detection counter is set to a state detection threshold.
  • Step 6 The MTC terminal moves to the new cell during the mobile process, and reads the tracking area identifier in the system message of the new cell, and compares the locally saved tracking area identifier to find that the two do not match, and the MTC terminal sends the tracking area update request.
  • the MTC terminal moves to the new cell during the mobile process, and reads the tracking area identifier in the system message of the new cell, and compares the locally saved tracking area identifier to find that the two do not match, and the MTC terminal sends the tracking area update request.
  • Step 7 After receiving the tracking area update request of the terminal, the new MME obtains the context information of the MTC terminal from the source MME where the MTC terminal is located first;
  • the context information of the MTC terminal should include the value of the remaining time of the state detection timer, the current value of the state detection counter, and the location information of the specified range that the terminal is allowed to move.
  • Step 8 After the tracking area is successfully updated, the new MME continues to run the state detection timer.
  • the MME detects whether the terminal is within the allowed specified range. If the terminal is within the allowed specified range, no counting is performed. If the terminal moves outside the allowed specified range, the state detecting counter is decremented by one;
  • the terminal moves outside the allowed specified range, including moving from the allowed moving range, moving back to the allowed moving range, or moving from the allowed moving range to the allowed moving range. In addition, or move between cells outside the allowed range.
  • Step 9 If the value of the status detection counter reaches 0, the MME sends an alarm event report to the MTC server.
  • the alarm event report indicates that the motion state of the terminal does not match the subscription status.

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Description

一种检测机器类型通信终端移动性状态的方法和系统 技术领域
本发明涉及机器类型通信终端的管理技术， 特别是指一种检测机器类 型通信终端移动性状态的方法和系统。 背景技术
机器类型通信（Machine type communication, MTC )业务是指在业务 实现过程中不需要人为的控制， 所有的通信由机器自主完成的一种技术。 所述 MTC业务通常应用在物流监控、 安全监测、 远程医疗检测、 远程抄表 等技术领域中。在 MTC业务中通过传感器等感知终端的状态或操作来获得 业务数据， 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，该数据由移动运营商或者专门的 MTC运营商的 应用服务器进行管理， 可供 MTC用户或 MTC管理者查看。 其中， 通过传 感器获得业务数据的终端通常被称为 MTC终端。
由于 MTC业务需要应用在蜂窝无线通讯系统中， 因此简单介绍一下蜂 窝无线通讯系统。 图 1为蜂窝无线通讯系统的结构示意图， 如图 1所示， 蜂窝无线通讯系统中包括：核心网 11( Core Network, CN )、接入网 12( Radio Access Network, RAN )和终端 13。 核心网 11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 12包括多个基站 14, 或基 站及其控制节点， 接入网 12负责接入层事务， 例如： 无线资源的管理， 基 站 14之间可以根据实际情况存在物理或者逻辑上的连接， 每个基站还可以 和一个或者一个以上的核心网节点连接。 终端 13 即用户终端 （User Equipment, UE )是指可以和基站 14连接的各种终端， 例如： 移动电话或 者笔记本电脑等。 在蜂窝无线通讯系统中引入 MTC业务后， 由于 MTC终端与普通的终 端的应用方式不同， 例如： MTC终端可能会放置在某个固定场所不动， 又 或者仅在某个范围的区域移动， 例如： 远程电表、 自动售卖机等。 在这些 情况下， MTC的用户就需要网络能对这些 MTC终端的位置特性进行监控， 如果终端突然被移动， 或者运动出了限定的范围， 就表明该终端可能出现 故障或者是被盗窃，需要及时釆取措施。对这样的监控需求，网络需要 MTC 用户在签约入网时， 将位置信息作为签约数据保存在归属用户服务器 ( Home Subscriber Server, HSS )中。 HSS是电信网络中负责保存用户或终 端的身份信息、 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的绑定信息， 或只保存用户的身份信 息， 由网关保存用户和终端的绑定信息，或 HSS直接保存终端的身份信息。 HSS还进一步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。 在目前的现有技术中， 仅提出在 HSS中签约位置监控事件， 但网络系统中 并没有对应的功能单元来实现对 MTC终端的移动性状态进行判断和监控。 发明内容
有鉴于此，本发明的主要目的在于提供一种检测 MTC终端移动性状态 的方法和系统， 能够通过移动性管理实体 ( Mobility Management Entity, MME ) 实现对 MTC终端的移动性状态进行判断和监控。
为达到上述目的， 本发明的技术方案是这样实现的：
本发明提供了一种检测 MTC终端移动性状态的方法， 所述方法包括：
MME保存 MTC终端的移动性状态检测参数；
MME在 MTC终端执行附着、 或执行跟踪区更新、 或低移动性特性被 激活时， 开始计时并对 MTC终端的小区切换或跟踪区更新进行计数操作， 如果到达预设时限， 计数并未达到门限值， 则重新开始计时和计数操作， 如果在预设的状态检测时限内计数达到门限值， 则 MME针对 MTC终端的 运动状态进行告警。
其中， 所述 MTC终端的移动性状态检测参数， 包括： 针对 MTC终端 预设的状态检测时限和状态检测计数门限参数；或针对 MTC终端预设的状 态检测时限和状态检测计数门限参数，以及允许所述 MTC终端移动的指定 范围。
其中， 所述小区切换或跟踪区更新之后， 还包括：
MME根据 MTC终端的移动性状态检测参数判断是否仍位于指定范围 内， 如果是， 则不进行计数操作， 否则进行计数操作。
其中， 所述 MME保存 MTC终端的移动性状态检测参数， 包括： MTC 终端的移动性状态检测参数作为 MME本地参数预先设置并保 存； 或从归属用户服务器（HSS )获取 MTC终端的移动性状态检测参数并 保存。
其中， 所述在 MTC终端执行附着、 或执行跟踪区更新、 或低移动性特 性被激活时， 开始计时， 包括：
在 MME接收到 MTC终端的附着请求信令、 或跟踪区更新请求信令后 开始计时； 或
在 MME发送附着接受信令、 或跟踪区更新接受信令后开始计时； 或 在 MTC用户向运营商申请激活 MTC终端的低移动性特性， 运营商首 先修改 HSS签约数据，将该 MTC用户的 MTC终端签约信息中低移动性特 性设置为激活状态后开始计时。
其中， 所述 MME针对 MTC终端的运动状态进行告警， 包括： MME 本地保存告警信息、和 /或 MME将告警信息发送给 MTC服务器、和 /或 HSS、 和 /或网关。
本发明还提供了一种检测 MTC 终端移动性状态的系统， 所述系统包 括： MME和 MTC终端， 其中， 所述 MME, 用于保存 MTC终端的移动性状态检测参数， 在 MTC终 端执行附着、 或执行跟踪区更新、 或低移动性特性被激活时， 开始计时并 对 MTC终端的小区切换或跟踪区更新进行计数操作， 如果到达预设时限， 计数并未达到门限值， 则重新开始计时和计数操作， 如果在预设的状态检 测时限内计数达到门限值， 则针对 MTC终端的运动状态进行告警。
其中， 所述 MTC终端的移动性状态检测参数， 包括： 针对 MTC终端 预设的状态检测时限和状态检测计数门限参数；或针对 MTC终端预设的状 态检测时限和状态检测计数门限参数，以及允许所述 MTC终端移动的指定 范围。
其中，所述 MME还用于 ,所述小区切换或跟踪区更新之后 ,根据 MTC 终端的移动性状态检测参数判断是否仍位于指定范围内， 如果是， 则不进 行计数操作， 否则进行计数操作。
其中， 所述系统中还包括 HSS, 所述 HSS用于， 为 MME提供 MTC 终端的移动性状态检测参数。
本发明所提供的检测 MTC终端移动性状态的方法和系统， 由 MME保 存 MTC终端的移动性状态检测参数； MME在 MTC终端执行附着、 或执 行跟踪区更新、 或低移动性特性被激活时， 开始计时并对 MTC终端的小区 切换或跟踪区更新进行计数操作， 如果到达预设时限， 计数并未达到门限 值， 则重新开始计时和计数操作， 如果在预设的状态检测时限内计数达到 门限值， 则 MME针对 MTC终端的运动状态进行告警。 通过上述方法能够 通过 MME实现对 MTC终端的移动性状态进行判断和监控， 并进一步提供 告警，使 MTC终端的安全性得到了提高，同时还可以兼容现有网络的架构， 不需要花费高成本进行系统架构的改造， 具有较高的实用性。 附图说明
图 1为蜂窝无线通讯系统的结构示意图； 图 2为本发明一种检测 MTC终端移动性状态的方法流程示意图； 图 3为本发明一种检测 MTC终端移动性状态的系统结构示意图。 具体实施方式
本发明的基本思想是：由 MME保存 MTC终端的移动性状态检测参数； MME在 MTC终端执行附着、 或执行跟踪区更新、 或低移动性特性被激活 时， 开始计时并对 MTC终端的小区切换或跟踪区更新进行计数操作， 如果 到达预设时限， 计数并未达到门限值， 则重新开始计时和计数操作， 如果 在预设的状态检测时限内计数达到门限值， 则 MME针对 MTC终端的运动 状态进行告警。
下面结合附图和具体实施例对本发明的技术方案进一步详细阐述。 图 2为本发明一种检测 MTC终端移动性状态的方法流程示意图，如图 2所示， 所述方法包括：
步骤 201 , MME保存 MTC终端的移动性状态检测参数；
具体的， 所述 MTC终端的移动性状态检测参数， 包括： 针对 MTC终 端预设的状态检测时限和状态检测计数门限参数。 进一步的， 在针对允许 在指定范围内移动的 MTC终端进行监控时，所述移动性状态检测参数中还 包括： 允许 MTC终端移动的指定范围。 其中， 所述指定范围通过所述移动 性状态检测参数中携带的小区标识进行限定。
进一步的， 所述 MME保存 MTC终端的移动性状态检测参数的方式包 括： MTC终端的移动性状态检测参数作为 MME本地参数预先设置并保存， 或从归属用户服务器 ( HSS )获取 MTC终端的移动性状态检测参数并保存。 其中， 所述从 HSS获取 MTC终端的移动性状态检测参数， 包括： MME向 HSS发送更新位置请求信息，在所述请求信息中携带 MTC终端的国际移动 用户识另 ll码 ( International Mobile Subscriber Identification Number, IMSI ) 标识， HSS根据 IMSI标识， 查询其签约数据， 将签约数据中的移动性状态 检测参数 , 通过更新位置响应消息发送给 ΜΜΕ。
步骤 202, ΜΜΕ在 MTC终端执行附着、 或执行跟踪区更新、 或低移 动性特性被激活时，开始计时并对 MTC终端的小区切换或跟踪区更新进行 计数操作， 如果到达预设时限， 计数并未达到门限值， 则重新开始计时和 计数操作，如果在预设的状态检测时限内计数达到门限值，则执行步骤 203; 具体的，所述小区切换包括：基站间切换或 ΜΜΕ间切换。所述在 MTC 终端执行附着、 或执行跟踪区更新、 或低移动性特性被激活时， 开始计时， 包括： 在 ΜΜΕ接收到 MTC终端的附着请求信令、 或跟踪区更新请求信令 后开始计时；还可以是 ΜΜΕ发送附着接受信令、或跟踪区更新接受信令后 开始计时； 进一步还可以由 MTC用户向运营商申请激活 MTC终端的低移 动性特性， 运营商首先修改 HSS签约数据， 将该 MTC用户的 MTC终端签 约信息中低移动性特性设置为激活状态， 然后 HSS 发送插入数据信令给 ΜΜΕ, 将 MTC终端的低移动性特性为激活状态后开始计时。
所述开始计时并对 MTC终端的小区切换或跟踪区更新进行计数操作， 具体为： 启动定时器的同时启动计数器， 如果设置启动值为 0时， 在 MTC 终端进行小区切换或跟踪区更新之后， 计数器加 1 , 如果在预设的状态检测 时限内计数达到门限值， 则执行步骤 203; 另一种实现方式可以将启动值设 置为状态检测计数门限， 在 MTC终端进行小区切换或跟踪区更新之后， 计 数器减 1 ,如果在预设的状态检测时限内计数器数值减为 0,则执行步骤 203。 在实际应用中，可以通过在 ΜΜΕ中添加定时器作为状态检测定时器实现计 时操作， 在 ΜΜΕ中添加计数器作为状态检测计数器来实现计数操作。
进一步的， ΜΜΕ在所述计数的过程中， 如果 MTC终端的移动使执行 管理的 ΜΜΕ发生切换时 , 源 ΜΜΕ还需要将 MTC终端的移动性状态检测 参数 , 以及当前的计时和计数参数 ,一起发送给新的 ΜΜΕ继续进行计时和 计数操作。 进一步的， 对允许在指定范围内移动的 MTC终端进行监控的过程中， 在小区切换或跟踪区更新之后， MME根据 MTC终端的移动性状态检测参 数判断是否仍位于指定范围内， 如果是， 则不进行计数操作， 否则进行计 数操作。
步骤 203 , MME针对 MTC终端的运动状态进行告警。
具体的， 所述告警的方式包括： MME本地保存告警信息、 和 /或 MME 将告警信息发送给 MTC服务器、 和 /或 HSS、 和 /或网关。 其中所述告警信 息用于指示 MTC终端运动状态， 即移动性状态与签约状态不符。
图 3为本发明一种检测 MTC终端移动性状态的系统结构示意图，如图 3所示， 所述系统包括： MME31和 MTC终端 32, 其中，
所述 MME31 ,用于保存 MTC终端 32的移动性状态检测参数，在 MTC 终端 32执行附着、 或执行跟踪区更新、 或低移动性特性被激活时， 开始计 时并对 MTC终端 32的小区切换或跟踪区更新进行计数操作， 如果到达预 设时限， 计数并未达到门限值， 则重新开始计时和计数操作， 如果在预设 的状态检测时限内计数达到门限值， 则针对 MTC终端 32的运动状态进行 告警。
具体的， 所述 MTC终端 32的移动性状态检测参数， 包括： 针对 MTC 终端 32预设的状态检测时限和状态检测计数门限参数。 进一步的， 在针对 允许在指定范围内移动的 MTC终端 32进行监控时， 所述移动性状态检测 参数中还包括： 允许 MTC终端 32移动的指定范围。 其中， 所述指定范围 通过所述移动性状态检测参数中携带小区的标识进行限定。
进一步的， 所述 MME31保存 MTC终端 32的移动性状态检测参数的 方式包括： MTC终端 32的移动性状态检测参数作为 MME31本地参数预先 设置并保存、 或从 HSS33获取 MTC终端的移动性状态检测参数并保存。 当 MME31从 HSS33获取 MTC终端的移动性状态检测参数时，所述系统中 还包括 HSS33 , 所述 HSS33用于， 为 MME31提供 MTC终端的移动性状 态检测参数。
其中， 所述从 HSS33获取 MTC终端的移动性状态检测参数， 包括： MME31向 HSS33发送更新位置请求信息，在所述请求信息中携带 MTC终 端 32的 IMSI标识， HSS33根据 IMSI标识， 查询其签约数据， 将签约数据 中的移动性状态检测参数， 通过更新位置响应消息发送给 MME31。
所述小区切换包括： 基站间切换或 MME31间切换。 所述在 MTC终端 32执行附着、 或执行跟踪区更新、 或低移动性特性被激活时， 启动定时器 开始计时， 包括： 在 MME31接收到 MTC终端 32的附着请求信令、 或跟 踪区更新请求信令后启动定时器开始计时；还可以是 MME31发送附着接受 信令、或跟踪区更新接受信令后启动定时器开始计时；进一步还可以由 MTC 用户向运营商申请激活 MTC 终端 32 的低移动性特性， 运营商首先修改 HSS33签约数据， 将该 MTC用户的 MTC终端 32签约信息中低移动性特 性设置为激活状态， 然后 HSS33发送插入数据信令给 MME31 , 将 MTC终 端 32的低移动性特性为激活状态后启动定时器开始计时。
所述开始计时并对 MTC终端 32的小区切换或跟踪区更新进行计数操 作， 具体为： 启动定时器的同时启动计数器， 如果设置启动值为 0 时， 在 MTC终端 32进行小区切换或跟踪区更新之后， 计数器加 1 , 如果在预设的 状态检测时限内计数达到门限值， 则 MME31针对 MTC终端 32的运动状 态进行告警； 另一种实现方式可以将启动值设置为状态检测计数门限， 在 MTC终端 32进行小区切换或跟踪区更新之后， 计数器减 1 , 如果在预设的 状态检测时限内计数器数值减为 0,则 MME31针对 MTC终端 32的运动状 态进行告警。在实际应用中，可以通过在 MME31中添加定时器作为状态检 测定时器实现计时操作，在 MME31中添加计数器作为状态检测计数器来实 现计数操作。 进一步的 , MME31在所述计数的过程中 ,如果 MTC终端 32的移动使 执行管理的 MME31发生切换时， 源 MME31还需要将 MTC终端 32的移 动性状态检测参数， 以及当前的计时和计数参数， 一起发送给新的 MME31 继续进行计时和计数操作。
进一步的， 对允许在指定范围内移动的 MTC终端 32进行监控的过程 中，在小区切换或跟踪区更新之后， MME31根据 MTC终端 32的移动性状 态检测参数判断是否仍位于指定范围内， 如果是， 则不进行计数操作， 否 则进行计数操作。
所述告警的方式包括： MME31本地保存告警信息、和 /或 MME31将告 警信息发送给 MTC服务器、 和 /或 HSS33、 和 /或网关。 其中所述告警信息 用于指示 MTC终端 32运动状态， 即移动性状态与签约状态不符。
下面结合五个具体的实施例进行进一步的阐述：
实施例一中 MTC终端的移动性状态检测参数作为签约信息保存在 HSS 中， 定时器和计数器在 MME发送附着接受信令后启动：
步骤 1 , MTC终端发送附着请求或跟踪区更新请求到 MME;
步骤 2, MME接收到该终端的附着请求或跟踪区更新请求后， 检查本 地是否保存该 MTC终端的签约数据， 如果没有， 则发送更新位置请求信息 给 HSS,信息中包含该终端的标识 IMSI,表示需要请求该终端的签约数据； 步骤 3 , HSS在接收到 MME发送的更新位置请求信息后， 根据消息中 的终端的标识 IMSI, 查询其签约数据， 如果包含该终端的签约数据， 则通 过更新位置响应消息发送给 MME;
具体的， 在发送的签约数据中， 包含终端签约的低移动性检测状态参 数。 其中包括状态检测时限和状态检测计数门限参数。
步骤 4, MME在接收到 HSS发送的终端签约数据后，根据接收到的签 约数据在本地构造终端上下文信息， 保存状态检测时限和状态检测计数门 限参数；
步骤 5 , MME在完成对终端的认证后， 发送附着接受信令或跟踪区更 新接受信令给 MTC终端， 并启动状态检测定时器和状态检测计数器；
具体的， 状态检测计数器初始值设置为 0。
步骤 6, MTC终端在移动过程中运动到新的小区， 向基站发送测量报 告， 并请求执行切换；
步骤 7,基站在接收到 MTC终端的切换请求后，根据测量报告为 MTC 终端选择信号质量最好的小区作为目标小区；
步骤 8, MTC终端在切换成功后， 如果该目标小区仍与源小区连接到 相同的 MME, 则 MME将状态检测计数器值加 1 , 如果该目标小区连接到 与源小区不同的 MME , 则 MME将该 MTC终端的上下文信息发送给新 'J、 区的目标 MME;
具体的， MTC终端的上下文信息中应包括状态检测定时器剩余时间的 值， 状态检测计数器当前值。 除此以外， MTC终端的上下文信息还可以包 括状态检测定时器的初始值以及状态检测计数门限。
步骤 9, 目标 MME在本地启动状态检测定时器和状态检测计数器， 根 据源 MME发送的状态检测定时器的当前值继续计时，根据状态检测计数器 的当前值将状态检测计数器值加 1；
步骤 10,如果状态检测计数器的值达到状态检测门限， MME则发送告 警事件报告给 MTC服务器。
具体的， 告警事件^艮告指示该终端运动状态与签约状态不符。
实施例二中 MTC 终端的移动性状态检测参数作为签约信息保存在 MME中， 定时器和计数器在 MME接收到附着请求后启动：
步骤 1 , MTC终端发送附着请求或位置更新请求到 MME;
步骤 2 , MME接收到该终端的附着请求或位置更新请求后， 为该 MTC 终端启动状态检测定时器和状态检测计数器；
具体的， 状态检测定时器设置为本地保存的状态检测门限值， 状态检 测计数器设置为本地保存的状态检测计数门限。
步骤 3 , MTC终端在移动过程中运动到新的小区， 并读取新小区的系 统消息中的跟踪区标识， 并对比本地保存的跟踪区标识发现两者不符， 则 终端发送跟踪区更新请求给新 MME;
步骤 4, 新 MME在接收到终端的跟踪区更新请求后， 从终端先前所在 的源 MME获取 MTC终端的上下文信息；
具体的， MTC终端的上下文信息中应包括状态检测定时器剩余时间的 值， 状态检测计数器当前值。
步骤 5 , 在跟踪区更新成功后， 新 MME继续运行状态检测定时器， 将 状态检测计数器值减 1 ;
步骤 6, 如果状态检测计数器的值达到 0, MME则发送告警事件报告 给 MTC服务器。
具体的， 告警事件^艮告指示该终端运动状态与签约状态不符。
实施例三中 MTC 终端的移动性状态检测参数作为签约信息保存在 MME中， 定时器和计数器在低移动性特性激活时启动：
步骤 1 , MTC用户向运营商申请激活 MTC终端的低移动性特性； 具体的， 在实际应用中， 如果使用低移动性特性， 运营商能提供更低 的使用费率。
步骤 2, 运营商修改 HSS签约数据， 将该 MTC用户的 MTC终端签约 信息中的低移动性特性设置为激活状态；
步骤 3 , HSS发送插入数据信令给 MME, 将 MME中 MTC终端的低 移动性特性设置为激活状态；
步骤 4, MME接收到 HSS的信令后， 为该 MTC终端启动状态检测定 时器和状态检测计数器。 状态检测定时器设置为本地保存的初始值， 状态 检测计数器设置为 0;
步骤 5 , MTC终端在移动过程中运动到新的小区， 并读取新小区的系 统消息中的跟踪区标识， 并对比本地保存的跟踪区标识发现两者不符， 则 MTC终端发送跟踪区更新请求给新 MME;
步骤 6, 新 MME在接收到终端的跟踪区更新请求后， 从 MTC终端先 前所在的源 MME获取 MTC终端的上下文信息；
具体的， MTC终端的上下文信息中应包括状态检测定时器剩余时间的 值， 状态检测计数器当前值。
步骤 7 , 在跟踪区更新成功后， 新 MME继续运行状态检测定时器， 将状态检测计数器值加 1 ;
步骤 8, 如果状态检测计数器的值达到状态检测门限， MME则发送告 警事件报告给 MTC服务器。
具体的， 告警事件^艮告指示该终端运动状态与签约状态不符。
实施例四中 MTC终端允许在指定范围内移动， MTC终端的移动性状 态检测参数作为签约信息保存在 HSS中：
步骤 1 , MTC终端发送附着请求或跟踪区更新请求到 MME;
步骤 2, MME接收到该 MTC终端的附着请求或跟踪区更新请求后， 检查本地是否有该终端的签约数据， 如果没有， 则发送更新位置请求信息 给 HSS, 信息中包含该终端的标识 IMSI, 表明需要请求该 MTC终端的签 约数据；
步骤 3 , HSS在接收到 MME发送的更新位置请求信息后， 根据消息中 的终端的标识 IMSI, 查询其签约数据， 如果包含该 MTC终端的签约数据， 则通过更新位置响应消息发送给 MME;
具体的， 在发送的签约数据中， 包含 MTC终端签约的低移动性检测状 态参数。 其中包括状态检测时限和状态检测计数门限参数。
步骤 4, MME在接收到 HSS发送的终端签约数据后，根据接收到的签 约数据在本地构造终端上下文信息， 保存状态检测时限和状态检测计数门 限参数；
步骤 5 , MME在完成对终端的认证后， 发送附着接受信令或跟踪区更 新接受信令给 MTC终端， 并启动状态检测定时器和状态检测计数器；
具体的， 状态检测计数器初始值设置为 0。
步骤 6, MTC终端在移动过程中运动到新的小区， 向基站发送测量报 告， 并请求执行切换；
步骤 7,基站在接收到 MTC终端的切换请求后，根据测量报告为 MTC 终端选择信号质量最好的小区作为目标小区；
步骤 8, MTC终端切换执行成功后， MME检测 MTC终端是否在允许 的指定范围内， 如果 MTC终端在允许的指定范围内， 则不进行计数， 如果 MTC终端在允许的指定范围外发生移动， 则状态检测计数器加 1 ;
具体的， MTC终端在允许的指定范围外发生移动， 包含从允许移动范 围外， 移动回允许的移动范围内， 或从允许移动范围内， 移动到允许的移 动范围外， 或在允许的指定范围外的小区之间移动。
步骤 9, 如果状态检测计数器的值达到状态检测门限， MME则发送告 警事件报告给 MTC服务器。
具体的， 告警事件^艮告指示该终端运动状态与签约状态不符。
实施例五中 MTC终端允许在指定范围内移动， MTC终端的移动性状 态检测参数作为签约信息保存在 HSS中， 通过跟踪区更新判断移动性： 步骤 1 , MTC终端发送附着请求或跟踪区更新请求到 MME;
步骤 2, MME接收到该终端的附着请求或跟踪区更新请求后， 检查本 地是否有该终端的签约数据， 如果没有， 则发送更新位置请求信息给 HSS, 信息中包含该终端的标识 IMSI, 表明需要请求该终端的签约数据； 步骤 3 , HSS在接收到 MME发送的更新位置请求信息后， 根据消息中 的 MTC终端的标识 IMSI, 查询其签约数据， 如果包含该 MTC终端的签约 数据， 则通过更新位置响应消息发送给 MME;
具体的， 在发送的签约数据中， 包含终端签约的低移动性检测状态参 数。 其中包括状态检测时限和状态检测计数门限参数。
步骤 4, MME在接收到 HSS发送的终端签约数据后，根据接收到的签 约数据在本地构造终端上下文信息， 保存状态检测时限和状态检测计数门 限参数；
步骤 5 , MME在完成对终端的认证后， 发送附着接受信令或跟踪区更 新接受信令给 MTC终端， 并启动状态检测定时器和状态检测计数器；
具体的， 状态检测计数器初始值设置为状态检测门限值。
步骤 6, MTC终端在移动过程中运动到新的小区， 并读取新小区的系 统消息中的跟踪区标识， 并对比本地保存的跟踪区标识发现两者不符， 则 MTC终端发送跟踪区更新请求给新 MME;
步骤 7 , 新 MME在接收到终端的跟踪区更新请求后， 从 MTC终端先 前所在的源 MME获取 MTC终端的上下文信息；
具体的， MTC终端的上下文信息中应包括状态检测定时器剩余时间的 值， 状态检测计数器当前值， 以及该终端允许移动的指定范围的位置信息。
步骤 8, 在跟踪区更新成功后， 新 MME继续运行状态检测定时器，
MME检测终端是否在允许的指定范围内， 如果终端在允许的指定范围内， 则不进行计数， 如果终端在允许的指定范围外发生移动， 则状态检测计数 器减 1；
具体的， 终端在允许的指定范围外发生移动， 包含从允许移动范围外， 移动回允许的移动范围内， 或从允许移动范围内， 移动到允许的移动范围 夕卜， 或在允许的指定范围外的小区之间移动。
步骤 9, 如果状态检测计数器的值达到 0, MME则发送告警事件报告 给 MTC服务器。
具体的， 告警事件^艮告指示该终端运动状态与签约状态不符。
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、 一种检测机器类型通信（MTC )终端移动性状态的方法， 其特征在 于， 所述方法包括：
移动性管理实体（MME )保存 MTC终端的移动性状态检测参数； MME在 MTC终端执行附着、 或执行跟踪区更新、 或低移动性特性被 激活时， 开始计时并对 MTC终端的小区切换或跟踪区更新进行计数操作， 如果到达预设时限， 计数并未达到门限值， 则重新开始计时和计数操作， 如果在预设的状态检测时限内计数达到门限值， 则 MME针对 MTC终端的 运动状态进行告警。
2、 根据权利要求 1所述的方法， 其特征在于， 所述 MTC终端的移动 性状态检测参数， 包括： 针对 MTC终端预设的状态检测时限和状态检测计 数门限参数；或针对 MTC终端预设的状态检测时限和状态检测计数门限参 数， 以及允许所述 MTC终端移动的指定范围。
3、 根据权利要求 2所述的方法， 其特征在于， 所述小区切换或跟踪区 更新之后， 所述方法还包括：
MME根据 MTC终端的移动性状态检测参数判断是否仍位于指定范围 内， 如果是， 则不进行计数操作， 否则进行计数操作。
4、 根据权利要求 1 或 2所述的方法， 其特征在于， 所述 MME保存 MTC终端的移动性状态检测参数， 包括：
MTC 终端的移动性状态检测参数作为 MME本地参数预先设置并保 存； 或从归属用户服务器（HSS )获取 MTC终端的移动性状态检测参数并 保存。
5、 根据权利要求 1或 2所述的方法， 其特征在于， 所述在 MTC终端 执行附着、 或执行跟踪区更新、 或低移动性特性被激活时， 开始计时， 包 括： 在 MME接收到 MTC终端的附着请求信令、 或跟踪区更新请求信令后 开始计时； 或
在 MME发送附着接受信令、 或跟踪区更新接受信令后开始计时； 或 在 MTC用户向运营商申请激活 MTC终端的低移动性特性， 运营商首 先修改 HSS签约数据，将该 MTC用户的 MTC终端签约信息中低移动性特 性设置为激活状态后开始计时。
6、 根据权利要求 1 或 2所述的方法， 其特征在于， 所述 MME针对 MTC 终端的运动状态进行告警， 包括： MME 本地保存告警信息、 和 /或 MME将告警信息发送给 MTC服务器、 和 /或 HSS、 和 /或网关。
7、 一种检测 MTC终端移动性状态的系统， 其特征在于， 所述系统包 括： MME和 MTC终端， 其中，
所述 MME, 用于保存 MTC终端的移动性状态检测参数， 在 MTC终 端执行附着、 或执行跟踪区更新、 或低移动性特性被激活时， 开始计时并 对 MTC终端的小区切换或跟踪区更新进行计数操作， 如果到达预设时限， 计数并未达到门限值， 则重新开始计时和计数操作， 如果在预设的状态检 测时限内计数达到门限值， 则针对 MTC终端的运动状态进行告警。
8、 根据权利要求 7所述的系统， 其特征在于， 所述 MTC终端的移动 性状态检测参数， 包括： 针对 MTC终端预设的状态检测时限和状态检测计 数门限参数；或针对 MTC终端预设的状态检测时限和状态检测计数门限参 数， 以及允许所述 MTC终端移动的指定范围。
9、 根据权利要求 8所述的系统， 其特征在于， 所述 MME还用于， 所 述小区切换或跟踪区更新之后，根据 MTC终端的移动性状态检测参数判断 是否仍位于指定范围内， 如果是， 则不进行计数操作， 否则进行计数操作。
10、 根据权利要求 7或 8所述的系统， 其特征在于， 所述系统中还包 括 HSS, 所述 HSS用于， 为 MME提供 MTC终端的移动性状态检测参数。
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