WO2012037839A1 - 一种机器类型通信终端的接入控制方法及系统 - Google Patents

一种机器类型通信终端的接入控制方法及系统 Download PDF

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Publication number
WO2012037839A1
WO2012037839A1 PCT/CN2011/077552 CN2011077552W WO2012037839A1 WO 2012037839 A1 WO2012037839 A1 WO 2012037839A1 CN 2011077552 W CN2011077552 W CN 2011077552W WO 2012037839 A1 WO2012037839 A1 WO 2012037839A1
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WIPO (PCT)
Prior art keywords
network element
core network
mtc terminal
time period
period information
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Application number
PCT/CN2011/077552
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English (en)
French (fr)
Inventor
李兰兰
戴谦
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中兴通讯股份有限公司
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Publication of WO2012037839A1 publication Critical patent/WO2012037839A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to an access control method and system for a machine type communication terminal.
  • M2M Machine to Machine
  • MTC Machine Type Communication
  • ME MTC User Equipment
  • PLMN Public Land Mobile Network
  • FIG. 1 shows the MTC network structure in the Long Term Evolution (LTE) architecture.
  • the MTC UE is a terminal device that communicates with the MTC server through the carrier network.
  • the MTC contractor is a service for the MTC terminal. Entity, MTC contractor includes multiple MTC users.
  • the MTC user is connected to the PLMN network through the MTC server, and the MTC server provides services for the MTC user.
  • the MTC terminal needs to communicate with the network only for a certain preset time period, and the MTC terminal having such a feature is referred to as an MTC terminal having a "time control" feature.
  • an MTC terminal in a power meter reading system transmits data to the network side only during a predetermined fixed period of time of each month.
  • the MTC network architecture proposes a group concept for the MTC terminal, that is, groups the MTC terminals according to common features or regions. If the terminal in the MTC packet has a time characteristic, the same allowed access period can be signed for the MTC packet, which The terminals in the MTC packet have the same allowed access time period.
  • the time period information is determined by the contracting process, and is stored as the subscription data in the home subscriber server of the home network to which the terminal belongs (Home Subscriber Server). , HSS).
  • the time period information of the contract includes two types: time zone information that allows access and time zone information that is prohibited from accessing.
  • the network side allows the MTC terminal to access the network, and the MTC terminal can perform normal services.
  • the network side performs access control on the MTC terminal, and does not allow the MTC terminal to access the network.
  • the requirement for the time period for prohibiting access is because the MTC server needs to be maintained for a certain period of time. The normal service cannot be performed, so the network side does not allow the MTC terminal to access during this time.
  • the network side can modify the allowed access time period information according to requirements.
  • the load level of the network side changes during different time periods, or there is a time difference in different areas, and the core network element
  • the Mobility Management Entity MME
  • MME Mobility Management Entity
  • the core network element MME can obtain the subscription information of the MTC terminal from the HSS.
  • the time period information in the subscription information may be used as an access control parameter of the MTC terminal having the "time control" feature, and the MTC terminal having the "time control" feature sends an access request to the core network outside the permitted access time period of the subscription.
  • the core network element will reject the access request of the MTC terminal.
  • the time period information of the subscription may be stored in a Universal Integrated Circuit Card (UICC) and stored in the MTC terminal.
  • UICC Universal Integrated Circuit Card
  • the core network element of the visited network can modify the allowed access time period information of the MTC terminal according to the time difference of the local and home network locations or the network load condition, and can be separated by a separate MTC terminal or MTC packet. to modify.
  • An object of the present invention is to provide an access control method and system for a machine type communication terminal, and a core network element and a machine type communication terminal, to solve the problem that the MTC terminal roams into the visited network in the prior art. It is not possible to determine when an access request is initiated to access the visited network.
  • the access control method of a machine type communication terminal of the present invention includes: when a machine type communication (MTC) terminal roams to a visited network, the core network element of the visited network refers to the visited network.
  • the allowed access time period information local to the core network element is notified to the MTC terminal.
  • the method further includes: after the MTC terminal learns the allowed access time period information of the network element of the core network of the visited network, and when it needs to access the visited network, according to the allowed access time period information, Access request.
  • the allowed access time period information of the core network element of the visited network is a time period obtained by modifying, by the core network element of the visited network, the allowed access time period information subscribed by the MTC terminal.
  • the information or the core network element of the visited network is configured to allow access time period information locally configured on the core network element of the visited network for one, multiple or one type of MTC terminal.
  • the step of the network access network element of the visited network notifying the MTC terminal of the access network time zone of the network element of the visited network to the MTC terminal includes: the MTC terminal is in a connected state, and the After the manner of roaming to the visited network, the core network element of the visited network sends a relocation request response message to the core network element of the home network of the MTC terminal after receiving the relocation request message, carrying the visit
  • the allowed access time period information of the core network element of the network is notified to the MTC terminal by the local access network time zone information of the network element of the visited network by using the relocation request response message.
  • the step of notifying, by the relocation request response message, the allowed access time period information of the core network element of the visited network to the MTC terminal includes: receiving, by the core network element of the home network After the relocation request response message, if The MTC terminal can successfully switch to the visited network, and initiate a handover command process to the base station to which the MTC terminal belongs, and notify the local access network time zone information of the visited network core in the handover command.
  • the base station sends a radio resource control connection reconfiguration message to the MTC terminal, and carries the allowed access time period information locally of the visited network.
  • the step of notifying the local allowed access time period information to the MTC terminal by using the relocation request response message includes: receiving, by the core network element of the home network, the relocation request response message After the MTC terminal fails to successfully cut into the visited network, the handover preparation failure process is initiated to the base station, and the allowed access time period information locally of the visited network is notified to the The base station, the base station notifies the MTC terminal of the allowed access time period information locally of the core network element of the visited network by using a system message or a paging message.
  • the step of the network element of the visited network notifying the MTC terminal of the local network element of the visited network to the MTC terminal includes: the core network element of the visited network
  • the allowed access time period information localized by the core network element of the visited network is notified to the base station managed by the core network element of the visited network; and the base station managed by the core network element of the visited network will visit the visited network
  • the allowed access time period information locally of the core network element is notified to the MTC terminal by using a system message.
  • the step of the core network element of the visited network notifying the base station network element of the visited network to the base station managed by the core network element of the visited network includes: The core network element of the visited network uses the S1 interface to establish a request response message, a configuration update request response message, or an overload start message, and notifies the core access network time zone of the visited network to the core.
  • the base station managed by the network element includes: The core network element of the visited network uses the S1 interface to establish a request response message, a configuration update request response message, or an overload start message, and notifies the core access network time zone of the visited network to the core.
  • the step that the core network element of the visited network notifies the MTC terminal of the allowed access time period information of the core network element of the visited network includes: the MTC terminal is in an idle state, When the cell reselection roams to the visited network, sending an access request message to the core network element of the visited network; After the core network element of the visited network receives the access request message, if the
  • the non-access stratum (NAS) message is used to notify the MTC terminal of the allowed access time period information of the core network element of the visited network; if the MTC terminal is not allowed to access, Then, in the attach request rejection message, the allowed access time period information locally of the core network element of the visited network is notified to the MTC terminal.
  • the NAS message is an attach request accept message, a periodic tracking domain update message, or a new NAS message.
  • an access control system for a machine type communication terminal of the present invention includes: a core network element and a machine type communication (MTC) terminal, wherein: the core network element is set to: in the MTC When the terminal roams to the core network element, the local network network element allows the access time period information to be notified to the MTC terminal; the MTC terminal is configured to: obtain the local permission of the core network element After accessing the time period information, when the network element of the core network needs to be accessed, the access request is initiated according to the allowed access time period information.
  • MTC machine type communication
  • the core network element is configured to notify the MTC terminal of the allowed access time period information of the core network element in the following manner: when the MTC terminal is in a connected state, by switching After the method of roaming to the core network element, the core network element sends a relocation request response message to the core network element of the home network of the MTC terminal after receiving the relocation request message, and carries the core network.
  • the local access allowed time period information is notified to the MTC terminal by the relocation request response message, or the local access time of the core network element is allowed.
  • the segment information is notified to the base station managed by the core network element, so that the base station managed by the core network element notifies the allowed access time period information of the core network element to the MTC terminal by using a system message. .
  • the MTC terminal is further configured to: when in an idle state, when the cell reselection roams to the core network element, send an access request message to the core network element;
  • the core network element is configured to notify the MTC terminal of the allowed access time period information locally of the core network element in the following manner: after receiving the access request message, if the MTC is allowed If the terminal accesses, the allowed access time period information of the core network element is notified to the MTC terminal by using a non-access stratum (NAS) message; if the MTC terminal is not allowed to access, the attach request is In the reject message, the allowed access time period information local to the core network element is notified to the MTC terminal.
  • NAS non-access stratum
  • a core network element of the present invention is configured to: when the core network element is a core network element of the visited network, when the machine type communication (MTC) terminal roams to the visited network, The allowed access time period information local to the core network element of the visited network is notified to the MTC terminal.
  • the core network element is configured to notify the MTC terminal of the allowed access time period information of the core network element of the visited network in the following manner: the MTC terminal is in the connection After the roaming to the visited network, the core network element of the visited network sends a relocation request response message to the core network element of the home network of the MTC terminal after receiving the relocation request message.
  • the allowed access time period information of the core network element of the visited network is notified, and the allowed access time period information of the core network element of the visited network is notified to the MTC by using the relocation request response message
  • the core network element of the visited network notifies the base station network element of the visited network to the base station managed by the core network element of the visited network, so that the visited
  • the base station managed by the core network element of the network notifies the local access time range information of the core network element of the visited network through the system message to the website Or an MTC terminal; or an access request message sent to a core network element of the visited network when the MTC terminal is in an idle state and roaming to the visited network by cell reselection; and a core network of the visited network
  • the network element After receiving the access request message, if the MTC terminal is allowed to access, the network element notifies the local access network time zone of the visited network by the non-access stratum (NAS) message To the MTC terminal, if the MTC terminal is not allowed to access, in the attach request
  • the core network element is configured to notify the MTC terminal of the allowed access time period information of the core network element of the visited network by using the relocation request response message in the following manner.
  • the core network element is the core network element of the home network
  • the core network element of the home network receives the relocation request response message, if
  • the MTC terminal can successfully switch to the visited network, and initiate a handover command process to the base station to which the MTC terminal belongs, and notify the local access network time zone information of the visited network core in the handover command.
  • the base station is configured to enable the base station to send a radio resource control connection reconfiguration message to the MTC terminal, and carry the allowed access time period information locally of the visited network; the core network element of the home network receives the relocation After requesting a reply message, if
  • the handover preparation failure process is initiated to the base station, and the allowed access time period information locally of the visited network is notified to the base station during the handover preparation failure, so that the The base station notifies the MTC terminal of the allowed access time period information locally of the core network element of the visited network by using a system message or a paging message.
  • the present invention notifies the local network access network segment to the MTC terminal by the core network element of the visited network when the MTC terminal roams to the visited network, so that the MTC terminal can
  • the access time period information is allowed to initiate an access request, which solves the problem that the MTC terminal cannot determine when to initiate an access request to access the visited network in the roaming network.
  • FIG. 1 is a schematic diagram of an LTE-based MTC network architecture in the prior art
  • FIG. 2 is a schematic diagram of a time configuration of an ME having a time control feature in the prior art
  • FIG. 3 is an access control of a machine type communication terminal according to the present invention
  • FIG. 4 is a flowchart of an implementation 2 of an access control method for a machine type communication terminal of the present invention
  • FIG. 5 is a flowchart of an implementation 3 of an access control method for a machine type communication terminal of the present invention.
  • the MTC terminal cannot obtain the modified access time period information in the visited network, and the MTC terminal still retains the allowed access time period information in the home network.
  • the MTC terminal cannot obtain the time period information of the visited network that allows the MTC terminal to access, and thus cannot know when the access request is initiated to access the visited network, which has great limitations.
  • the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.
  • Embodiment 1 When a connected MTC terminal (referred to as ME) roams to a visited network by means of handover, if the core network element (source core network element) of the home network and the core network element of the visited network (target core network) The allowed access time period of the network element has a coincident part, and the ME cuts into the visited network during the coincident time period, and the ME can successfully switch into the visited network.
  • the target core network element (for example, the target MME) may notify the ME of the local allowed access time period information by using the handover success response message during the handover success response.
  • FIG. 3 is a method for controlling access to an ME when the ME roams to the visited network by means of handover, and the method includes:
  • the ME is located in the home network, and obtains subscription information, where the subscription information includes the time period information of the subscription; the time period information of the subscription includes one of the allowed access period information of the ME and the time period information of the prohibited access or A variety.
  • the ME can obtain the time period information of the contract during the initial attachment to the network.
  • the ME updates the subscription information of the ME through the "update location flow process", and the contracted time period information is used as part of the subscription information. If the subscription is performed with the MTC packet as the granularity, the time period information of the MTC packet terminal subscription is the same, and the MTC packet terminal acquires the unified time period information of the MTC packet.
  • the ME initiates an attach request within the allowed access period of the subscription, and after accessing the home network, performs measurement according to the measurement configuration on the base station (source base station) of the home network during the mobile process, and reports the measurement result to the source.
  • Base station source base station
  • the source base station After receiving the measurement result reported by the ME, the source base station evaluates the measurement result according to a preset Radio Resource Management (RRM) algorithm, and determines whether the ME needs to switch to the target base station in the adjacent visited network. If the source base station determines that the ME needs to switch to the target base station in the visited network, the MME sends a handover request message to the MME of the home network, where the handover request message carries information such as the identifier of the ME and the identifier of the target cell; Switching process of the S1 interface. After receiving the handover request message sent by the source base station, the source MME in the home network sends a relocation request message to the target MME, where the relocation request message carries the identifier of the ME and the configuration of the ME in the source base station.
  • RRM Radio Resource Management
  • the target MME modifies the allowed access time period information of the ME subscription according to the local overload condition, and the modified allowed access time period information is saved locally in the target MME, as the local MME allows access. Entering time period information, the time period information is used as an access control parameter for the ME to access the network; the target MME may obtain the allowed access time period information of the ME subscription from the HSS according to the identifier of the ME through the interface with the HSS. .
  • the allowed access time period information of the target MME may be the time zone information obtained by modifying the allowed access time period information for the ME subscription, the local overload status, or the like, or may be the target MME in the visited network.
  • the allowed access time period information configured for one, multiple or one type of MTC terminal directly according to the local overload condition of the target MME.
  • the target MME may modify the allowed access time period information with a single ME or MTC packet as a granularity.
  • the modified access time period information locally obtained by the target MME may be overlapped with the permitted access time period information in the home network, or may not overlap. part. 306:
  • the target MME sends a relocation request response message to the source MME in the home network.
  • the ME If the handover time of the ME is within the allowed access time period of the visited network (ie, the allowed access time period information of the target MME), the ME The target MME can successfully switch to the target base station of the visited network, and the target MME carries the "request acceptance" cause value in the relocation request response message; if the ME handover time is not within the allowed access time period of the visited network, the ME cannot successfully switch.
  • the target MME carries the "relocation failure" cause value in the relocation request response message; the relocation request response message carries the allowed access time period information locally on the visited network; the target MME in the visited network is During the relocation request response, a relocation request response message is sent.
  • the allowed access time period information local to the target MME carried in the relocation request response message is used as one cell in the relocation request response message.
  • Step 307 After receiving the relocation request response message, the source MME checks the reason value carried in the message. If the value of the request is accepted, the ME considers that the ME can successfully switch to the target base station and initiate a handover command process to the source base station. In the process of the handover command, the local access time zone information of the visited network is notified to the ME; if the relocation request response message carries the "relocation failure" cause value, the ME is considered to be unable to successfully switch to the target base station, and the execution is performed.
  • Step 307a Visiting the allowed access time period information locally on the network as a new one of the cell contents in the handover command.
  • the source MME initiates a handover preparation failure process to the source base station, and sends a handover preparation failure message to the source base station in the handover preparation failure process, where the handover preparation failure message carries the allowed access time period information locally of the visited network, and the source base station passes the air.
  • the system message or the paging message of the interface notifies the ME of the allowed access time period information of the visited network; the system message may be a System Information Block (SIB) message in the prior art, such as an SIB2 message, or System messages added for MTC terminals, dedicated to The above time period information is transmitted to the ME.
  • SIB System Information Block
  • the ME may initiate an access request within the allowed access time period.
  • the source base station obtains the allowed access time period information locally visited by the source MME, and the source base station determines that the ME can switch to the target base station, and sends a radio resource control (RRC) to the ME.
  • RRC radio resource control
  • the connection reconfiguration message carries the information of the allowed access time period locally on the visited network.
  • Embodiment 2 The target MME in the visited network may notify the target base station of the local allowed access time period information for a certain ME or a certain type of ME, and the ME may sort the ME according to the service type, according to the group pair.
  • the ME classifies or classifies the MEs according to their priorities.
  • the target base station notifies the ME of the allowed access time period information through the system message.
  • the ME in the idle (IDLE) state enters the visited network through the cell reselection mode or the ME in the connected state enters the visited network through the switching mode
  • the ME obtains the local allowed access time period information through the broadcast message, and saves the obtained information. Time period information during which an attach request is initiated.
  • FIG. 4 is a method for controlling access to an ME when the ME roams to the visited network by means of cell reselection or handover, and the method includes:
  • the target MME configures and saves the allowed access time period information of the target MME as the access control parameter of the ME accessing the network; the allowed access time period information of the target MME may be for some obtained from the HSS. Or the access time period information of a certain type of ME subscription, the time period information obtained after modification according to the local overload condition and the system maintenance time, or the target MME in the visited network may directly be based on the local overload condition and system maintenance. Time, etc., allow access time period information for certain or certain types of MEs configured for one, multiple, or a class of MTC terminals.
  • the part of the allowed access time period information of the visited local network may overlap with the permitted access time period information of the subscription in the home network, or there may be no overlapping part.
  • the target MME notifies the target access time range information of the target MME to the target base station through the S1 interface process; the S1 interface process of the target MME notifying the local access time zone information of the target MME is various, including: One or more of the process, the configuration update process, and the overload start process.
  • the corresponding messages that can be used are the S1 interface setup request response message, the configuration update request response message, and the overload start message.
  • the allowed access time period information locally of the target MME is used as the content of one extended information unit in the above message, and the target MME is notified to the target base station by using the above three types of messages.
  • the target base station notifies the local allowed access time period information to the ME through a system message; the system message may be an SIB2 message, or a system message added for transmitting ME-specific information.
  • the time information is notified to the ME as a cell of the system message.
  • the ME initiates an access process within an allowed access time period of the local network, and can successfully access the network.
  • the target MME in the visited network may notify the ME of the allowed access time period information of the target MME through Non-Access Stratum (NAS) signaling. If the ME in the IDLE state enters the area managed by the target MME of the visited network by means of cell reselection (after roaming to the visited network), the ME does not know the allowed access time period information locally of the target MME.
  • the ME initiates an attach request to the core network. If the attach request is initiated within the allowed access time period of the local network, the core network allows the ME to access, and the ME can successfully access the network, and the core network element is in the access process.
  • NAS Non-Access Stratum
  • the local access time period information is notified to the ME through an allow access response message (eg, attach accept) in the NAS message, or the local allowed access time period information is notified to the ME through a periodic update process; If the time when the ME initiates the attach request is not within the local allowed access time period, the core network element does not allow the ME to access, and the ME access is unsuccessful. The core network element sends a reject message to the ME in the NAS message through the access procedure, and refuses to attach. The local notification of the allowed access time period information is notified to the ME.
  • FIG. 5 is a method for controlling access to an ME when the ME roams to the visited network by means of cell reselection in the embodiment, and the method includes:
  • the target MME configures and saves the allowed access time period information of the target MME as the access control parameter of the ME accessing the network; the allowed access time period information of the target MME may be for some obtained from the HSS. Or the access time period information of a certain type of ME subscription, the time period information obtained after modification according to the local overload condition and the system maintenance time, or the target MME in the visited network may directly be based on the local overload condition and system maintenance. Time, etc., allow access time period information for certain or certain types of MEs configured for one, multiple, or a class of MTC terminals.
  • the allowed access time period information of the visited local network may overlap with the permitted access time period information of the subscription in the home network, or there may be no overlapping parts.
  • the ME in the IDLE state enters the coverage area of the base station in the visited network by using a cell reselection process
  • the access control process is performed on the core network, and the base station does not perform access control on the ME.
  • the ME initiates an attach procedure in the visited network according to the service requirement, and the ME sends an attach request message to the core network element in the visited network.
  • the core network element allows the ME to access the core network, and the local access permission of the visited network is accessed through the NAS process.
  • the time information is notified to the ME; the NAS process may be an attach request response process, a Tracking Area Update (TAU) process, or a NAS process added for the MTC architecture.
  • the message corresponding to the above process may be an attach request accept message, a periodic TAU message, or a NAS message added for transmitting MTC-specific information.
  • the core network element MME notifies the ME of the allowed access time period information to the ME, and the time period information is transmitted as one cell in the NAS message. It should be noted that if the local access time is not allowed in the attach request accept message The segment information is notified to the ME, and then the core network element MME can use the other NAS procedures described above to separately notify the ME of the allowed access time period information.
  • 504a If the ME does not initiate an attach request within the allowed access time period of the visited network, the MME in the visited network does not allow the ME to access the network, and notifies the local allowed access time period information in the attach request rejection message. To the ME.
  • the embodiment further provides an access control system for a machine type communication terminal, the system comprising: a core network element and a machine type communication (MTC) terminal, wherein: the core network element is set to: in the MTC When the terminal roams to the core network element, the local network network element allows the access time period information to be notified to the MTC terminal; the MTC terminal is configured to: obtain the local permission of the core network element After accessing the time period information, when the network element of the core network needs to be accessed, the access request is initiated according to the allowed access time period information.
  • MTC machine type communication
  • the core network element is configured to notify the MTC terminal of the allowed access time period information of the core network element in the following manner: when the MTC terminal is in a connected state, After roaming to the core network element, the core network element sends a relocation request response message to the core network element of the home network of the MTC terminal after receiving the relocation request message, Notifying the access time period information of the local network element of the core network, and notifying the local permitted access time period information to the MTC terminal by using the relocation request response message; or allowing local permission of the core network element
  • the access time period information is notified to the base station managed by the core network element, so that the base station managed by the core network element notifies the local access time range information of the core network element through the system message to the Said MTC terminal.
  • the MTC terminal is further configured to: when in an idle state, when the cell reselection roams to the core network element, send an access request message to the core network element;
  • the network element is configured to notify the MTC terminal of the allowed access time period information of the core network element in the following manner: after receiving the access request message, if allowed If the MTC terminal accesses, the allowed access time period information of the core network element is notified to the MTC terminal by using a non-access stratum (NAS) message; if the MTC terminal is not allowed to access, And notifying, in the attach request rejection message, the allowed access time period information local to the core network element to the MTC terminal.
  • NAS non-access stratum
  • the embodiment also provides a core network element, which is configured to: when the core network element is a core network element of the visited network, when the machine type communication (MTC) terminal roams to the visited network, The allowed access time period information locally reported by the core network element of the visited network is notified to the MTC terminal.
  • the allowed access time period information of the core network element of the visited network is the allowed access time period information that the core network element of the visited network subscribes to the MTC terminal.
  • the core network element is configured to notify the MTC terminal of the allowed access time period information of the core network element of the visited network in the following manner: the MTC After the terminal is in the connected state, the core network element of the visited network sends a relocation to the core network element of the home network of the MTC terminal after receiving the relocation request message.
  • the MTC terminal or the core network element of the visited network notifies the allowed access time period information of the core network element of the visited network to the base station managed by the core network element of the visited network, so that The base station managed by the core network element of the visited network passes the allowed access time period information of the core network element of the visited network through the system message Or an access request message sent to a core network element of the visited network when the MTC terminal is in an idle state and roaming to the visited network by cell reselection; and the visited network After the core network element receives the access request message, if the MTC terminal is allowed to access, Notifying, by the non-access stratum (NAS) message, the allowed access time period information of the core network element of the visited network to the MTC terminal; if the MTC terminal is not allowed to access, the attach request reject message And not
  • the core network element of the visited network establishes a request response message, a configuration update request response message, or an overload start message by using the S1 interface, and localizes the core network element of the visited network.
  • the access time period information is allowed to be notified to the base station managed by the core network element.
  • the core network element is configured to notify the local access network time zone of the visited network by the relocation request response message as follows:
  • the MTC terminal when the core network element is the core network element of the home network, after the core network element of the home network receives the relocation request response message, if the MTC terminal can successfully enter the network
  • the handover command procedure is initiated to the base station to which the MTC terminal belongs, and the allowed access time period information of the core network element of the visited network is notified to the base station during the handover command, so that the The base station sends a radio resource control connection reconfiguration message to the MTC terminal, and carries the allowed access time period information locally of the visited network; after receiving the relocation request response message, the core network element of the home network receives the relocation request response message If the MTC terminal fails to successfully cut into the visited network, the handover preparation failure process is initiated to the base station, and the handover preparation failure process is performed.
  • the embodiment also provides an MTC terminal, which is configured to: when the MTC terminal roams to the visited network, receive the core network element of the visited network notified by the core network element of the visited network to the MTC terminal Local access time period information.
  • the MTC terminal of the embodiment is further configured to: after learning the allowed access time period information of the core network element of the visited network, when the access network needs to be accessed, the information is initiated according to the allowed access time period information. Access request.
  • the MTC terminal is configured to receive the allowed access time period of the core network element of the visited network notified by the core network element of the visited network to the MTC terminal.
  • Information The MTC terminal is in a connected state, and when receiving the roaming to the visited network, the core network element receiving the visited network notifies the MTC terminal of the core of the visited network by using a relocation request response message.
  • the access time period information of the network element is locally located; wherein the charging is a request response message, and the core network element of the visited network receives the relocation request message, and sends the relocation request message to the core network of the home network of the MTC terminal.
  • the relocation request response message sent by the network element where the relocation request response message carries the allowed access time period information locally of the core network element of the visited network.
  • the MTC terminal is configured to receive the core network element of the visited network notified by the core network element of the visited network to the MTC terminal by using a relocation request response message.
  • Allowing access time period information receiving, by the base station to which the MTC terminal belongs, a radio resource control connection reconfiguration message carrying the allowed access time period information locally of the visited network to the MTC terminal, where the visited network local
  • the allowed access time period information is that after the base station receives the relocation request response message from the core network element of the home network, if the MTC terminal can successfully cut into the visited network, the base station initiates the call to the base station.
  • Allowed access time period information wherein the allowed access time period information local to the visited network is that the base station is in the home network
  • the MTC terminal receives the relocation request response message, if the MTC terminal cannot successfully cut into the visited network, and initiates a handover preparation failure to the base station, the core network from the home network Yuan obtained.
  • the MTC terminal is configured to receive the allowed access time period of the core network element of the visited network notified by the core network element of the visited network to the MTC terminal.
  • the base station managed by the core network element that receives the visited network receives the allowed access time period information of the core network element of the visited network sent by the core network element of the visited network, and then passes the system message.
  • the allowed access time period information local to the core network element of the visited network notified to the MTC terminal is configured to receive the allowed access time period of the core network element of the visited network notified by the core network element of the visited network to the MTC terminal.
  • the MTC terminal is in an idle state, and when the cell reselection roams to the visited network, an access request message is sent to the core network element of the visited network; and the core network element receiving the visited network receives After the access request message, if the MTC terminal is allowed to access, the allowed access time period information of the core network element of the visited network notified by the non-access stratum (NAS) message to the MTC terminal And receiving, after receiving the access request message, the core network element of the visited network, if the MTC terminal is not allowed to access, the core of the visited network notified by the attach request rejection message to the MTC terminal; The allowed access time period information of the local network element.
  • the NAS message is an attach request accept message, a periodic tracking domain update message, or a new NAS message.
  • the core network element of the visited network notifies the local access time period information to the MTC terminal, so that the MTC terminal can be connected according to the local permission when needed.
  • the time period information initiates an access request, which solves the problem that the MTC terminal cannot determine when to initiate an access request to access the visited network in the roaming network.

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Abstract

本发明公开了一种机器类型通信终端的接入控制方法，该方法包括：机器类型通信（MTC）终端在漫游到拜访网络时，该拜访网络的核心网网元将所述拜访网络的核心网网元本地的允许接入时间段信息通知给所述MTC终端。本发明还公开了一种机器类型通信终端的接入控制系统以及一种核心网网元。本发明解决了MTC终端在漫游网络中无法确定何时发起接入请求才能接入到拜访网络中的问题。

Description

一种机器类型通信终端的接入控制方法及系统
技术领域 本发明涉及通信技术领域， 尤其涉及一种机器类型通信终端的接入控制 方法及系统。
背景技术
机器对机器（Machine to Machine, M2M )是二十世纪九十年代提出的 概念， 是通信技术发展的重要驱动力量。 简单的说， M2M就是机器的互联 网， M2M的实现手段包括各种联网技术。 M2M技术的目标就是使所有机器 设备都具备联网和通信能力， 其核心理念就是网络一切 （ Network Everything ) 。 M2M的通信对象为机器对机器或者人对机器。 一个或多个机 器之间的数据通信定义为机器类型通信 （Machine Type Communication, MTC ) , 这种情况下较少需要人机互动。 参与 MTC 的机器， 定义为 MTC 终端 （MTC User Equipment, ME ) 。 MTC终端是 MTC用户的终端， 可通 过公众陆地移动电话网 （Public Land Mobile Network, PLMN )与其他 MTC 终端和 MTC服务器进行通信。 图 1是长期演进（Long Term Evolution, LTE ) 架构下的 MTC网络结构， 如图 1所示， MTC UE是通过运营商网络与 MTC 服务器通讯的终端设备， MTC签约者是一个为 MTC终端提供业务的实体， MTC签约者包括多个 MTC用户。 MTC用户通过 MTC服务器和 PLMN网络 相连， MTC服务器为 MTC用户提供服务。 在某些应用场景中， MTC终端仅在一定预设时间段内需要与网络进行通 信， 具有这样特征的 MTC终端称为具有 "时间控制"特征的 MTC终端。 比 如， 电力抄表系统中的 MTC终端， 仅仅在每个月的某个预设的固定时间段 内向网络侧发送数据。 MTC网络架构对 MTC终端提出了组（ Group )概念， 也就是对 MTC终端按照共同特征或者地域进行分组。如果 MTC分组中的终 端具有时间特征， 那么可以针对 MTC分组签约同样的允许接入时间段， 这 样 MTC分组中的终端具有相同的允许接入时间段。 如图 2所示， 在 MTC网络架构中， 针对具有 "时间控制" 特征的 MTC 终端， 时间段信息通过签约过程确定， 并且作为签约数据保存在终端所属的 归属网络的归属用户服务器（Home Subscriber Server, HSS ) 中。 签约的时 间段信息包括两种： 允许接入时间段信息和禁止接入的时间段信息。 在允许 接入时间段内， 网络侧允许 MTC终端接入到网络中， MTC终端能够进行正 常的业务。 在禁止接入的时间段内， 网络侧对 MTC终端进行接入控制， 不 允许 MTC终端接入到网络中，提出禁止接入的时间段的需求是因为 MTC服 务器需要在某个时间段进行维护， 不能进行正常的业务， 因此在这段时间内 网络侧不允许 MTC终端接入。 在现有技术中， 网络侧可以根据需求修改允许接入时间段信息， 比如， 网络侧的负荷程度在不同的时间段内是发生变化的， 或者在不同的地区会有 时差， 核心网网元移动性管理实体（Mobility Management Entity, MME )可 以根据负荷程度或者本地的一些特殊情况修改允许接入时间段信息。 但是， 禁止接入的时间段信息一经签约， 不允许进行修改， 即使是 MTC终端在漫 游过程中，在拜访网络中也要釆用归属网络中签约的禁止接入的时间段信息。 当 MTC终端通过初始附着流程接入网络时， 核心网网元 MME可以从 HSS上获取该 MTC终端的签约信息。 签约信息中的时间段信息可以作为具 有 "时间控制" 特征的 MTC终端的接入控制参数， 当具有 "时间控制" 特 征的 MTC终端在签约的允许接入时间段之外向核心网发送接入请求消息时， 那么核心网网元将拒绝 MTC终端的接入请求。 签约的时间段信息可以存储 在通用集成电路卡（ Universal Integrated Circuit Card, UICC )中保存在 MTC 终端中。 当 MTC终端漫游到拜访网络， 拜访网络的核心网网元可以根据本 地和归属网络所在地的时间差或网络负荷情况修改 MTC终端的允许接入时 间段信息， 可以以单独的 MTC终端或者 MTC分组为粒度进行修改。 但是， 本发明申请的发明人发现： 拜访网络的核心网网元修改 MTC终端的允许接 入时间段信息后， MTC终端将无法知道在何时发起接入请求才能接入到拜访 网络中。 发明内容 本发明的目的是提供一种机器类型通信终端的接入控制方法及系统， 以 及一种核心网网元和一种机器类型通信终端， 以解决现有技术中 MTC终端 漫游到拜访网络中时无法确定何时发起接入请求才能接入到拜访网络中的问 题。 为解决上述技术问题， 本发明的一种机器类型通信终端的接入控制方法 包括： 机器类型通信（MTC )终端在漫游到拜访网络时， 该拜访网络的核心网 网元将所述拜访网络的核心网网元本地的允许接入时间段信息通知给所述 MTC终端。 所述方法还包括： 所述 MTC终端获知所述拜访网络的核心网网元本地 的允许接入时间段信息后， 在需要接入到所述拜访网络时， 根据该允许接入 时间段信息发起接入请求。 上述方法中， 所述拜访网络的核心网网元本地的允许接入时间段信息为 所述拜访网络的核心网网元对所述 MTC终端签约的允许接入时间段信息进 行修改得到的时间段信息或所述拜访网络的核心网网元针对一个、 多个或一 类 MTC终端， 在拜访网络的核心网网元本地配置的允许接入时间段信息。 上述方法中 , 拜访网络的核心网网元将所述拜访网络的核心网网元本地 的允许接入时间段信息通知给所述 MTC终端的步骤包括： 所述 MTC终端处于连接状态， 通过切换的方式漫游到所述拜访网络时， 该拜访网络的核心网网元在接收到重定位请求消息后， 向所述 MTC终端的 归属网络的核心网网元发送重定位请求应答消息， 携带所述拜访网络的核心 网网元本地的允许接入时间段信息， 通过该重定位请求应答消息将所述拜访 网络的核心网网元本地的允许接入时间段信息通知给所述 MTC终端。 上述方法中， 通过该重定位请求应答消息将所述拜访网络的核心网网元 本地的允许接入时间段信息通知给所述 MTC终端的步骤包括： 所述归属网络的核心网网元接收到所述重定位请求应答消息后， 若所述 MTC终端能够成功切入所述拜访网络， 则向该 MTC终端所属的基站发起切 换命令过程， 在该切换命令过程中将所述拜访网络的核心网网元本地的允许 接入时间段信息通知给所述基站， 该基站向所述 MTC终端发送无线资源控 制连接重配消息， 携带所述拜访网络本地的允许接入时间段信息。 上述方法中， 通过该重定位请求应答消息将所述本地的允许接入时间段 信息通知给所述 MTC终端的步骤包括： 所述归属网络的核心网网元接收到所述重定位请求应答消息后， 若所述 MTC 终端无法成功切入所述拜访网络， 则向所述基站发起切换准备失败过 程， 在该切换准备失败过程中将所述拜访网络本地的允许接入时间段信息通 知给所述基站， 该基站通过系统消息或寻呼消息将所述拜访网络的核心网网 元本地的允许接入时间段信息通知到所述 MTC终端。 上述方法中 , 拜访网络的核心网网元将所述拜访网络的核心网网元本地 的允许接入时间段信息通知给所述 MTC终端的步骤包括： 所述拜访网络的核心网网元将所述拜访网络的核心网网元本地的允许接 入时间段信息通知到该拜访网络的核心网网元所管理的基站； 以及 所述拜访网络的核心网网元所管理的基站将所述拜访网络的核心网网元 本地的允许接入时间段信息通过系统消息通知到所述 MTC终端。 上述方法中， 所述拜访网络的核心网网元将所述拜访网络的核心网网元 本地的允许接入时间段信息通知到该拜访网络的核心网网元所管理的基站的 步骤包括： 所述拜访网络的核心网网元釆用 S1 接口建立请求应答消息、 配置更新 请求应答消息或过载开始消息， 将所述拜访网络的核心网网元本地的允许接 入时间段信息通知到所述核心网网元所管理的基站。 上述方法中， 所述拜访网络的核心网网元将所述拜访网络的核心网网元 本地的允许接入时间段信息通知给所述 MTC终端的步骤包括： 所述 MTC终端处于空闲状态， 通过小区重选漫游到所述拜访网络时， 向所述拜访网络的核心网网元发送接入请求消息； 所述拜访网络的核心网网元接收到所述接入请求消息后， 若允许所述
MTC终端接入， 则通过非接入层（ NAS )消息将所述拜访网络的核心网网元 本地的允许接入时间段信息通知给所述 MTC终端；若不允许所述 MTC终端 接入， 则在附着请求拒绝消息中， 将所述拜访网络的核心网网元本地的允许 接入时间段信息通知给所述 MTC终端。 上述方法中，所述 NAS消息为附着请求接受消息、周期性的跟踪域更新 消息或新增 NAS消息。 为解决上述技术问题， 本发明的一种机器类型通信终端的接入控制系统 包括： 核心网网元和机器类型通信（MTC )终端， 其中： 所述核心网网元设置为： 在所述 MTC终端漫游到该核心网网元时， 将 所述核心网网元本地的允许接入时间段信息通知给所述 MTC终端； 所述 MTC终端设置为： 在获知所述核心网网元本地的允许接入时间段 信息后， 在需要接入到所述核心网网元时， 根据该允许接入时间段信息发起 接入请求。 上述系统中， 所述核心网网元是设置为按如下方式将所述核心网网元本 地的允许接入时间段信息通知给所述 MTC终端： 在所述 MTC终端处于连接状态， 通过切换的方式漫游到所述核心网网 元时， 该核心网网元在接收到重定位请求消息后， 向所述 MTC终端的归属 网络的核心网网元发送重定位请求应答消息， 携带所述核心网网元本地的允 许接入时间段信息， 通过该重定位请求应答消息将所述本地的允许接入时间 段信息通知给所述 MTC终端； 或者 将所述核心网网元本地的允许接入时间段信息通知到该核心网网元所管 理的基站， 以使所述核心网网元所管理的基站将所述核心网网元本地的允许 接入时间段信息通过系统消息通知到所述 MTC终端。 上述系统中， 所述 MTC终端还设置为： 在处于空闲状态， 通过小区重选漫游到所述 核心网网元时， 向所述核心网网元发送接入请求消息； 所述核心网网元是设置为按如下方式将所述核心网网元本地的允许接入 时间段信息通知给所述 MTC终端： 在接收到所述接入请求消息后， 若允许 所述 MTC终端接入， 则通过非接入层 （NAS ) 消息将所述核心网网元本地 的允许接入时间段信息通知到所述 MTC终端；若不允许所述 MTC终端接入， 则在附着请求拒绝消息中将所述核心网网元本地的允许接入时间段信息通知 到所述 MTC终端。 为解决上述技术问题， 本发明的一种核心网网元设置为： 当所述核心网网元为拜访网络的核心网网元时， 机器类型通信（MTC ) 终端在漫游到拜访网络时， 将所述拜访网络的核心网网元本地的允许接入时 间段信息通知给所述 MTC终端。 上述核心网网元中， 所述核心网网元是设置为按如下方式将所述拜访网 络的核心网网元本地的允许接入时间段信息通知给所述 MTC终端： 所述 MTC终端处于连接状态， 通过切换的方式漫游到所述拜访网络时， 该拜访网络的核心网网元在接收到重定位请求消息后， 向所述 MTC终端的 归属网络的核心网网元发送重定位请求应答消息， 携带所述拜访网络的核心 网网元本地的允许接入时间段信息， 通过该重定位请求应答消息将所述拜访 网络的核心网网元本地的允许接入时间段信息通知给所述 MTC终端； 或者 所述拜访网络的核心网网元将所述拜访网络的核心网网元本地的允许接 入时间段信息通知到该拜访网络的核心网网元所管理的基站， 以使所述拜访 网络的核心网网元所管理的基站将所述拜访网络的核心网网元本地的允许接 入时间段信息通过系统消息通知到所述 MTC终端； 或者 接收所述 MTC终端处于空闲状态且通过小区重选漫游到所述拜访网络 时， 向所述拜访网络的核心网网元发送的接入请求消息； 以及所述拜访网络 的核心网网元接收到所述接入请求消息后， 若允许所述 MTC终端接入， 则 通过非接入层（NAS ) 消息将所述拜访网络的核心网网元本地的允许接入时 间段信息通知给所述 MTC终端； 若不允许所述 MTC终端接入， 则在附着请 求拒绝消息中， 将所述拜访网络的核心网网元本地的允许接入时间段信息通 知给所述 MTC终端。 上述核心网网元中， 所述核心网网元是设置为按如下方式通过该重定位 请求应答消息将所述拜访网络的核心网网元本地的允许接入时间段信息通知 给所述 MTC终端： 当所述核心网网元为归属网络的核心网网元时， 所述归属网络的核心网网元接收到所述重定位请求应答消息后， 若所述
MTC终端能够成功切入所述拜访网络， 则向该 MTC终端所属的基站发起切 换命令过程， 在该切换命令过程中将所述拜访网络的核心网网元本地的允许 接入时间段信息通知给所述基站， 以使该基站向所述 MTC终端发送无线资 源控制连接重配消息， 携带所述拜访网络本地的允许接入时间段信息； 所述归属网络的核心网网元接收到所述重定位请求应答消息后， 若所述
MTC 终端无法成功切入所述拜访网络， 则向所述基站发起切换准备失败过 程， 在该切换准备失败过程中将所述拜访网络本地的允许接入时间段信息通 知给所述基站， 以使该基站通过系统消息或寻呼消息将所述拜访网络的核心 网网元本地的允许接入时间段信息通知到所述 MTC终端。
综上所述， 本发明通过在 MTC终端漫游到拜访网络时， 由拜访网络的 核心网网元将本地的允许接入时间段信息通知给 MTC终端，使 MTC终端能 够在需要时， 根据本地的允许接入时间段信息发起接入请求， 解决了 MTC 终端在漫游网络中无法确定何时发起接入请求才能接入到拜访网络中的问 题。
附图概述 图 1是现有技术中基于 LTE的 MTC网络架构图； 图 2是现有技术中具有时间控制特征的 ME的时间配置的示意图； 图 3是本发明机器类型通信终端的接入控制方法实施 1的流程图； 图 4是本发明机器类型通信终端的接入控制方法实施 2的流程图； 以及 图 5是本发明机器类型通信终端的接入控制方法实施 3的流程图。 本发明的较佳实施方式 现有技术中 MTC终端无法获取到拜访网络中修改后的允许接入时间段 信息， MTC终端中保留的仍然是在归属网络中签约的允许接入时间段信息， 当 MTC终端无法获取到拜访网络的允许该 MTC终端接入的时间段信息，也 就无法获知在何时发起接入请求以接入到拜访网络中， 存在很大的局限性。 为使本发明的目的、 技术方案和优点更加清楚明白， 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 : 连接态的 MTC终端（简称 ME )通过切换的方式漫游到拜访网络时， 若 归属网络的核心网网元（源核心网网元）和拜访网络的核心网网元 (目标核 心网网元） 的允许接入时间段有重合的部分， 且 ME在重合的时间段内切入 拜访网络， 则 ME能够成功切换进入到拜访网络中。 目标核心网网元（如： 目标 MME )可以在切换成功应答过程中， 通过切换成功应答消息将本地的 允许接入时间段信息通知到 ME。 如果源核心网网元 (如： 源 MME )和目标 MME的允许接入时间段没有重合的部分， ME在归属网络签约的允许接入时 间段内不能成功切换到拜访网络中，目标 MME可以在切换失败应答过程中， 通过切换失败应答消息将本地的允许接入时间段信息通知给源 MME, 源 MME再通过归属网络的基站（源基站）将允许接入时间段信息通知 ME。 图 3是本实施例 ME通过切换的方式漫游到拜访网络时， 对 ME的接入 控制方法， 该方法包括：
301 : ME位于归属网络中， 获取签约信息， 签约信息中包含签约的时间 段信息； 签约的时间段信息包含该 ME的允许接入时间段信息和禁止接入的时间 段信息中的一种或多种。 ME可以在初始附着到网络的过程中获取签约的时间段信息。 ME在初始 附着到网络时，通过 "更新位置流过程"与 HSS交互获取该 ME的签约信息， 签约的时间段信息作为签约信息的一部分。 如果是以 MTC分组为粒度进行的签约，那么 MTC分组终端签约的时间 段信息一致， MTC分组终端获取到的是 MTC分组统一的时间段信息。
302: ME在签约的允许接入时间段内发起附着请求，接入到归属网络后， 在移动过程中根据归属网络的基站（源基站）上的测量配置执行测量， 且将 测量结果上报到源基站；
303: 源基站接收到 ME上报的测量结果后， 根据预置的无线资源管理 ( Radio Resource Management, RRM ) 算法对测量结果进行评价， 判断该 ME是否需要切换到相邻的拜访网络中的目标基站下， 如果源基站判断 ME 需要切换进入到拜访网络中的目标基站， 则向归属网络的 MME发送切换请 求消息， 切换请求消息中携带该 ME的标识和目标小区的标识等信息； 切换流程是基于 S1接口的切换流程。 304: 归属网络中的源 MME接收到源基站发送的切换请求消息后， 向目 标 MME发送重定位请求消息， 重定位请求消息中携带 ME的标识和该 ME 在源基站中的配置等信息；
305: 目标 MME接收到重定位请求消息后， 根据本地的过载状况修改 ME签约的允许接入时间段信息， 修改后的允许接入时间段信息保存在目标 MME本地， 作为目标 MME本地的允许接入时间段信息， 将该时间段信息 作为该 ME接入到网络的接入控制参数； 目标 MME可以通过与 HSS的接口， 根据 ME的标识从 HSS中获取该 ME签约的允许接入时间段信息。 目标 MME本地的允许接入时间段信息可以如上所述是针对 ME签约的 允许接入时间段信息，根据本地的过载状况等进行修改后得到的时间段信息， 也可以是拜访网络中的目标 MME直接根据目标 MME本地的过载状况， 针 对一个、 多个或一类 MTC终端配置的允许接入时间段信息。 目标 MME可以以单个 ME或 MTC分组为粒度修改允许接入时间段信 息。 在拜访网络中， 目标 MME修改允许接入时间段信息后， 修改得到目标 MME本地的允许接入时间段信息与归属网络中签约的允许接入时间段信息 可能有重合的部分， 也可能没有重合的部分。 306: 目标 MME向归属网络中的源 MME发送重定位请求应答消息， 如 果 ME的切换时刻在拜访网络本地的允许接入时间段（即目标 MME本地的 允许接入时间段信息） 内， 则 ME可以成功切换到拜访网络的目标基站中， 目标 MME在重定位请求应答消息中携带 "请求接受" 原因值； 如果 ME的 切换时刻不在拜访网络本地的允许接入时间段内， 则 ME不能成功切换到目 标基站中， 目标 MME在重定位请求应答消息中携带 "重定位失败"原因值； 重定位请求应答消息中均要携带拜访网络本地的允许接入时间段信息； 拜访网络中的目标 MME在重定位请求应答过程中， 发送重定位请求应 答消息。 重定位请求应答消息中携带的目标 MME本地的允许接入时间段信 息作为重定位请求应答消息中的一个信元。 目前重定位请求应答消息中有留 作私有扩展的字段域， 可以将时间段信息作为私有扩展字段域内容。
307:源 MME接收到重定位请求应答消息后，检查该消息携带的原因值， 如果检查出 "请求接受" 原因值， 则认为该 ME可以成功切换入目标基站， 向源基站发起切换命令过程， 在切换命令过程中将拜访网络本地的允许接入 时间段信息通知到 ME; 如果重定位请求应答消息中携带的是 "重定位失败" 原因值， 则认为该 ME不能成功切换入目标基站， 执行步骤 307a; 拜访网络本地的允许接入时间段信息作为切换命令中新增的一个信元内 容。
307a: 源 MME向源基站发起切换准备失败过程， 在切换准备失败过程 中向源基站发送切换准备失败消息， 在切换准备失败消息中携带拜访网络本 地的允许接入时间段信息， 源基站通过空中接口的系统消息或者寻呼消息将 拜访网络本地的允许接入时间段信息通知到 ME; 系统消息可以是现有技术中的系统信息块（System Information Block, SIB ) 消息， 比如 SIB2消息， 或者是为 MTC终端新增的系统消息， 专用于 向 ME传送上述时间段信息。
ME获取到拜访网络本地的允许接入时间段信息后， 可以在允许接入时 间段内发起接入请求。
308: 源基站在源 MME发起的切换命令过程中， 获取到拜访网络本地的 允许接入时间段信息， 源基站判断 ME可以切换进入目标基站， 向 ME发送 无线资源控制 （Radio Resource Control, RRC )连接重配消息， 携带拜访网 络本地的允许接入时间段信息。
实施例 2: 拜访网络中的目标 MME可以将针对某个 ME或某类 ME的本地的允许 接入时间段信息通知到目标基站， 某类 ME可以是按照业务类型对 ME进行 分类、 按照 group对 ME进行分类或者按照优先级对 ME进行分类。 目标基 站通过系统消息将本地的允许接入时间段信息通知到 ME。处于空闲（IDLE ) 态的 ME通过小区重选的方式进入拜访网络或处于连接态的 ME通过切换的 方式进入拜访网络时， ME通过广播消息获取到本地的允许接入时间段信息， 保存获取到的时间段信息， 在该时间段内发起附着请求。 图 4是本实施例 ME通过小区重选或切换的方式漫游到拜访网络时， 对 ME的接入控制方法， 该方法包括：
401 : 目标 MME配置并保存目标 MME本地的允许接入时间段信息， 作 为 ME接入到网络的接入控制参数； 目标 MME本地的允许接入时间段信息可以是针对从 HSS中获取的某些 或某类 ME签约的允许接入时间段信息， 根据本地的过载状况和系统维护时 间等进行修改后得到的时间段信息， 也可以是拜访网络中的目标 MME直接 根据本地的过载状况和系统维护时间等， 针对一个、 多个或一类 MTC终端 配置的针对某些或某类 ME的允许接入时间段信息。 拜访网络本地的允许接入时间段信息与归属网络中签约的允许接入时间 段信息可能有重合的部分， 也可能没有重合的部分。 402: 目标 MME将目标 MME本地的允许接入时间段信息通过 S1接口 流程通知到目标基站； 目标 MME通知目标 MME本地的允许接入时间段信息的 S1接口流程有 多种， 包括： S1接口建立过程、 配置更新过程和过载开始过程中的一种或多 种。 在上述过程中， 可以釆用的对应消息是 S1 接口建立请求应答消息、 配 置更新请求应答消息和过载开始消息。 目标 MME本地的允许接入时间段信 息作为上述消息中的一个扩展信息单元的内容， 通过上述三种消息由目标 MME通知到目标基站。
403： 目标基站将本地的允许接入时间段信息通过系统消息通知到 ME; 系统消息可以是 SIB2消息， 或者为传送 ME专用的信息而新增的系统 消息。 时间信息作为系统消息的信元通知到 ME。
404: 进入到拜访网络中的 ME, 读取拜访网络中目标基站发送的系统消 息的内容， 通过系统消息获取到本地的允许接入时间段信息；
405： ME在拜访网络本地的允许接入时间段内发起接入过程， 即可成功 接入到网络。
实施例 3: 拜访网络中的目标 MME可以通过非接入层（ Non Access Stratum , NAS ) 信令将目标 MME本地的允许接入时间段信息通知到 ME。如果是 IDLE态的 ME通过小区重选（漫游到拜访网络后 )的方式进入到拜访网络的目标 MME 管理的区域， 那么 ME不知道目标 MME本地的允许接入时间段信息。 ME 向核心网发起附着请求， 如果是在拜访网络本地的允许接入时间段内发起的 附着请求， 那么核心网允许 ME接入， ME可以成功接入到网络， 核心网网 元在接入过程中通过 NAS消息中的允许接入应答消息 （如： attach accept ) 将本地的允许接入时间段信息通知到 ME, 或者通过周期性的更新过程将本 地的允许接入时间段信息通知到 ME; 如果 ME发起附着请求的时间不在本 地的允许接入时间段内， 核心网网元不允许 ME接入， ME接入不成功。 核 心网网元通过接入过程给 ME发送 NAS消息中的拒绝附着消息，在拒绝附着 消息中将本地的允许接入时间段信息通知到 ME。 图 5是本实施方式 ME通过小区重选的方式漫游到拜访网络时， 对 ME 的接入控制方法， 该方法包括：
501 : 目标 MME配置并保存目标 MME本地的允许接入时间段信息 , 作 为 ME接入到网络的接入控制参数； 目标 MME本地的允许接入时间段信息可以是针对从 HSS中获取的某些 或某类 ME签约的允许接入时间段信息， 根据本地的过载状况和系统维护时 间等进行修改后得到的时间段信息， 也可以是拜访网络中的目标 MME直接 根据本地的过载状况和系统维护时间等， 针对一个、 多个或一类 MTC终端 配置的针对某些或某类 ME的允许接入时间段信息。 拜访网络本地的允许接入时间段信息与归属网络中签约的允许接入时间 段信息可能有重合的部分， 也可能没有重合的部分。
502: IDLE态的 ME通过小区重选过程进入到拜访网络中的基站覆盖区 域；
本实施例中，接入控制过程在核心网执行，基站不对该 ME做接入控制。
503: 根据业务需求， ME在拜访网络中发起附着过程， ME向拜访网络 中的核心网网元发送附着请求消息；
504:如果是在拜访网络中的核心网网元本地的允许接入时间段内发起附 着请求，那么该核心网网元允许 ME接入到核心网，通过 NAS过程将拜访网 络本地的允许接入的时间信息通知到 ME; 所述 NAS过程可以是附着请求应答过程、 周期性跟踪域更新（Tracking Area Update, TAU )过程或者是为 MTC架构新增的 NAS过程。 与上述过程 对应的消息可以是附着请求接受消息、 周期性的 TAU 消息或者是为传送 MTC专用信息新增的 NAS消息。 在所述信令中， 核心网网元 MME将本地 的允许接入时间段信息通知到 ME,该时间段信息作为 NAS消息中的一个信 元传送。 需要说明的是， 如果在附着请求接受消息中没有将本地的允许接入时间 段信息通知到 ME , 那么核心网网元 MME可以釆用上述的其他 NAS过程 , 单独将本地的允许接入时间段信息通知到 ME。
504a:如果 ME没有在拜访网络本地的允许接入时间段内发起附着请求， 那么拜访网络中的 MME不允许 ME接入到网络， 在附着请求拒绝消息中将 本地的允许接入时间段信息通知到 ME。
本实施例还提供了一种机器类型通信终端的接入控制系统，该系统包括： 核心网网元和机器类型通信（MTC )终端， 其中： 所述核心网网元设置为： 在所述 MTC终端漫游到该核心网网元时， 将 所述核心网网元本地的允许接入时间段信息通知给所述 MTC终端； 所述 MTC终端设置为： 在获知所述核心网网元本地的允许接入时间段 信息后， 在需要接入到所述核心网网元时， 根据该允许接入时间段信息发起 接入请求。 本实施例的系统中， 所述核心网网元是设置为按如下方式将所述核心网 网元本地的允许接入时间段信息通知给所述 MTC终端： 在所述 MTC终端处于连接状态， 通过切换的方式漫游到所述核心网网 元时， 该核心网网元在接收到重定位请求消息后， 向所述 MTC终端的归属 网络的核心网网元发送重定位请求应答消息， 携带所述核心网网元本地的允 许接入时间段信息， 通过该重定位请求应答消息将所述本地的允许接入时间 段信息通知给所述 MTC终端； 或者 将所述核心网网元本地的允许接入时间段信息通知到该核心网网元所管 理的基站， 以使所述核心网网元所管理的基站将所述核心网网元本地的允许 接入时间段信息通过系统消息通知到所述 MTC终端。 本实施例的系统中， 所述 MTC终端还设置为： 在处于空闲状态， 通过 小区重选漫游到所述核心网网元时， 向所述核心网网元发送接入请求消息； 所述核心网网元是设置为按如下方式将所述核心网网元本地的允许接入 时间段信息通知给所述 MTC终端： 在接收到所述接入请求消息后， 若允许 所述 MTC终端接入， 则通过非接入层 （NAS ) 消息将所述核心网网元本地 的允许接入时间段信息通知到所述 MTC终端；若不允许所述 MTC终端接入， 则在附着请求拒绝消息中将所述核心网网元本地的允许接入时间段信息通知 到所述 MTC终端。
本实施例还提供了一种核心网网元， 其设置为： 当所述核心网网元为拜访网络的核心网网元时， 机器类型通信（MTC ) 终端在漫游到拜访网络时， 将所述拜访网络的核心网网元本地的允许接入时 间段信息通知给所述 MTC终端。 本实施例的核心网网元中， 所述拜访网络的核心网网元本地的允许接入 时间段信息为所述拜访网络的核心网网元对所述 MTC终端签约的允许接入 时间段信息进行修改得到的时间段信息或所述拜访网络的核心网网元针对一 个、 多个或一类 MTC终端， 在拜访网络的核心网网元本地配置的允许接入 时间段信息。 本实施例的核心网网元中， 所述核心网网元是设置为按如下方式将所述 拜访网络的核心网网元本地的允许接入时间段信息通知给所述 MTC终端： 所述 MTC终端处于连接状态， 通过切换的方式漫游到所述拜访网络时， 该拜访网络的核心网网元在接收到重定位请求消息后， 向所述 MTC终端的 归属网络的核心网网元发送重定位请求应答消息， 携带所述拜访网络的核心 网网元本地的允许接入时间段信息， 通过该重定位请求应答消息将所述拜访 网络的核心网网元本地的允许接入时间段信息通知给所述 MTC终端； 或者 所述拜访网络的核心网网元将所述拜访网络的核心网网元本地的允许接 入时间段信息通知到该拜访网络的核心网网元所管理的基站， 以使所述拜访 网络的核心网网元所管理的基站将所述拜访网络的核心网网元本地的允许接 入时间段信息通过系统消息通知到所述 MTC终端； 或者 接收所述 MTC终端处于空闲状态并通过小区重选漫游到所述拜访网络 时， 向所述拜访网络的核心网网元发送的接入请求消息； 以及所述拜访网络 的核心网网元接收到所述接入请求消息后， 若允许所述 MTC终端接入， 则 通过非接入层（NAS ) 消息将所述拜访网络的核心网网元本地的允许接入时 间段信息通知给所述 MTC终端； 若不允许所述 MTC终端接入， 则在附着请 求拒绝消息中， 将所述拜访网络的核心网网元本地的允许接入时间段信息通 知给所述 MTC终端。 本实施例的核心网网元中， 所述拜访网络的核心网网元釆用 S1 接口建 立请求应答消息、 配置更新请求应答消息或过载开始消息， 将所述拜访网络 的核心网网元本地的允许接入时间段信息通知到所述核心网网元所管理的基 站。 本实施例的核心网网元中， 所述核心网网元是设置为按如下方式通过该 重定位请求应答消息将所述拜访网络的核心网网元本地的允许接入时间段信 息通知给所述 MTC终端： 当所述核心网网元为归属网络的核心网网元时， 所述归属网络的核心网网元接收到所述重定位请求应答消息后， 若所述 MTC终端能够成功切入所述拜访网络， 则向该 MTC终端所属的基站发起切 换命令过程， 在该切换命令过程中将所述拜访网络的核心网网元本地的允许 接入时间段信息通知给所述基站， 以使该基站向所述 MTC终端发送无线资 源控制连接重配消息， 携带所述拜访网络本地的允许接入时间段信息； 所述归属网络的核心网网元接收到所述重定位请求应答消息后， 若所述 MTC 终端无法成功切入所述拜访网络， 则向所述基站发起切换准备失败过 程， 在该切换准备失败过程中将所述拜访网络本地的允许接入时间段信息通 知给所述基站， 以使该基站通过系统消息或寻呼消息将所述拜访网络的核心 网网元本地的允许接入时间段信息通知到所述 MTC终端。 本实施例还提供了一种 MTC终端， 其设置为： 当 MTC终端在漫游到拜访网络时， 接收该拜访网络的核心网网元向所 述 MTC终端通知的所述拜访网络的核心网网元本地的允许接入时间段信息。 本实施例的 MTC终端还设置为： 获知所述拜访网络的核心网网元本地 的允许接入时间段信息后， 在需要接入到所述拜访网络时， 根据该允许接入 时间段信息发起接入请求。 本实施例的 MTC终端中，所述 MTC终端是设置为按如下方式接收该拜 访网络的核心网网元向所述 MTC终端通知的所述拜访网络的核心网网元本 地的允许接入时间段信息： 所述 MTC终端处于连接状态， 通过切换的方式漫游到所述拜访网络时， 接收该拜访网络的核心网网元通过重定位请求应答消息向所述 MTC终端通 知的所述拜访网络的核心网网元本地的允许接入时间段信息； 其中， 所述充 电为请求应答消息为该拜访网络的核心网网元在接收到重定位请求消息后， 向所述 MTC终端的归属网络的核心网网元发送的重定位请求应答消息， 所 述重定位请求应答消息携带所述拜访网络的核心网网元本地的允许接入时间 段信息。 本实施例的 MTC终端中，所述 MTC终端是设置为按如下方式接收该拜 访网络的核心网网元通过重定位请求应答消息向所述 MTC终端通知的所述 拜访网络的核心网网元本地的允许接入时间段信息： 接收该 MTC终端所属的基站向所述 MTC终端发送携带所述拜访网络本 地的允许接入时间段信息的无线资源控制连接重配消息， 其中， 所述拜访网 络本地的允许接入时间段信息是所述基站在所述归属网络的核心网网元接收 到所述重定位请求应答消息后， 若所述 MTC终端能够成功切入所述拜访网 络，向该基站发起的切换命令过程中，从所述归属网络的核心网网元获得的； 或者 接收该 MTC终端所属的基站通过系统消息或寻呼消息向所述 MTC终端 通知的所述拜访网络的核心网网元本地的允许接入时间段信息， 其中， 所述 拜访网络本地的允许接入时间段信息是所述基站在所述归属网络的核心网网 元接收到所述重定位请求应答消息后， 若所述 MTC终端无法成功切入所述 拜访网络， 向所述基站发起切换准备失败过程中， 从所述归属网络的核心网 网元获得的。 本实施例的 MTC终端中，所述 MTC终端是设置为按如下方式接收该拜 访网络的核心网网元向所述 MTC终端通知的所述拜访网络的核心网网元本 地的允许接入时间段信息： 接收所述拜访网络的核心网网元所管理的基站在接收到所述拜访网络的 核心网网元发送的所述拜访网络的核心网网元本地的允许接入时间段信息 后， 通过系统消息向所述 MTC终端通知的所述拜访网络的核心网网元本地 的允许接入时间段信息。 本实施例的 MTC终端中，所述 MTC终端是设置为按如下方式接收该拜 访网络的核心网网元向所述 MTC终端通知的所述拜访网络的核心网网元本 地的允许接入时间段信息： 所述 MTC终端处于空闲状态， 通过小区重选漫游到所述拜访网络时， 向所述拜访网络的核心网网元发送接入请求消息； 接收所述拜访网络的核心网网元接收到所述接入请求消息后， 若允许所 述 MTC终端接入， 向所述 MTC终端通过非接入层（ NAS )消息通知的所述 拜访网络的核心网网元本地的允许接入时间段信息； 或者 接收所述拜访网络的核心网网元接收到所述接入请求消息后， 若不允许 所述 MTC终端接入，通过附着请求拒绝消息向所述 MTC终端通知的所述拜 访网络的核心网网元本地的允许接入时间段信息。 本实施例的 MTC终端中： 所述 NAS消息为附着请求接受消息、 周期性 的跟踪域更新消息或新增 NAS消息。
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， 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， 本发明还可有多种实施方式， 在不背离本发明精神及其实质的情 凡在本发明的精神和原则之内所作的任何修改、 等同替换、 改进， 均应包含 在本发明的保护范围之内。 工业实用性 本发明通过在 MTC终端漫游到拜访网络时， 由拜访网络的核心网网元 将本地的允许接入时间段信息通知给 MTC终端，使 MTC终端能够在需要时， 根据本地的允许接入时间段信息发起接入请求， 解决了 MTC终端在漫游网 络中无法确定何时发起接入请求才能接入到拜访网络中的问题。

Claims

权 利 要 求 书
1、 一种机器类型通信终端的接入控制方法， 该方法包括： 机器类型通信（MTC )终端在漫游到拜访网络时， 该拜访网络的核心网 网元将所述拜访网络的核心网网元本地的允许接入时间段信息通知给所述 MTC终端。
2、 如权利要求 1所述的方法， 所述方法还包括： 所述 MTC终端获知所 述拜访网络的核心网网元本地的允许接入时间段信息后， 在需要接入到所述 拜访网络时， 根据该允许接入时间段信息发起接入请求。
3、如权利要求 1或 2所述的方法， 其中： 所述拜访网络的核心网网元本 地的允许接入时间段信息为所述拜访网络的核心网网元对所述 MTC终端签 约的允许接入时间段信息进行修改得到的时间段信息或所述拜访网络的核心 网网元针对一个、 多个或一类 MTC终端， 在拜访网络的核心网网元本地配 置的允许接入时间段信息。
4、如权利要求 1所述的方法， 其中，拜访网络的核心网网元将所述拜访 网络的核心网网元本地的允许接入时间段信息通知给所述 MTC终端的步骤 包括： 所述 MTC终端处于连接状态， 通过切换的方式漫游到所述拜访网络时， 该拜访网络的核心网网元在接收到重定位请求消息后， 向所述 MTC终端的 归属网络的核心网网元发送重定位请求应答消息， 携带所述拜访网络的核心 网网元本地的允许接入时间段信息， 通过该重定位请求应答消息将所述拜访 网络的核心网网元本地的允许接入时间段信息通知给所述 MTC终端。
5、如权利要求 4所述的方法， 其中， 通过该重定位请求应答消息将所述 拜访网络的核心网网元本地的允许接入时间段信息通知给所述 MTC终端的 步骤包括： 所述归属网络的核心网网元接收到所述重定位请求应答消息后， 若所述 MTC终端能够成功切入所述拜访网络， 则向该 MTC终端所属的基站发起切 换命令过程， 在该切换命令过程中将所述拜访网络的核心网网元本地的允许 接入时间段信息通知给所述基站， 该基站向所述 MTC终端发送无线资源控 制连接重配消息， 携带所述拜访网络本地的允许接入时间段信息。
6、如权利要求 4所述的方法， 其中， 通过该重定位请求应答消息将所述 本地的允许接入时间段信息通知给所述 MTC终端的步骤包括： 所述归属网络的核心网网元接收到所述重定位请求应答消息后， 若所述 MTC 终端无法成功切入所述拜访网络， 则向所述基站发起切换准备失败过 程， 在该切换准备失败过程中将所述拜访网络本地的允许接入时间段信息通 知给所述基站， 该基站通过系统消息或寻呼消息将所述拜访网络的核心网网 元本地的允许接入时间段信息通知到所述 MTC终端。
7、如权利要求 1所述的方法， 其中，拜访网络的核心网网元将所述拜访 网络的核心网网元本地的允许接入时间段信息通知给所述 MTC终端的步骤 包括： 所述拜访网络的核心网网元将所述拜访网络的核心网网元本地的允许接 入时间段信息通知到该拜访网络的核心网网元所管理的基站； 以及 所述拜访网络的核心网网元所管理的基站将所述拜访网络的核心网网元 本地的允许接入时间段信息通过系统消息通知到所述 MTC终端。
8、如权利要求 7所述的方法， 其中， 所述拜访网络的核心网网元将所述 拜访网络的核心网网元本地的允许接入时间段信息通知到该拜访网络的核心 网网元所管理的基站的步骤包括： 所述拜访网络的核心网网元釆用 S1 接口建立请求应答消息、 配置更新 请求应答消息或过载开始消息， 将所述拜访网络的核心网网元本地的允许接 入时间段信息通知到所述核心网网元所管理的基站。
9、如权利要求 1所述的方法， 其中， 所述拜访网络的核心网网元将所述 拜访网络的核心网网元本地的允许接入时间段信息通知给所述 MTC终端的 步骤包括： 所述 MTC终端处于空闲状态， 通过小区重选漫游到所述拜访网络时， 向所述拜访网络的核心网网元发送接入请求消息； 所述拜访网络的核心网网元接收到所述接入请求消息后， 若允许所述
MTC终端接入， 则通过非接入层（ NAS )消息将所述拜访网络的核心网网元 本地的允许接入时间段信息通知给所述 MTC终端；若不允许所述 MTC终端 接入， 则在附着请求拒绝消息中， 将所述拜访网络的核心网网元本地的允许 接入时间段信息通知给所述 MTC终端。
10、如权利要求 9所述的方法， 其中： 所述 NAS消息为附着请求接受消 息、 周期性的跟踪域更新消息或新增 NAS消息。
11、 一种机器类型通信终端的接入控制系统， 该系统包括： 核心网网元 和机器类型通信（MTC )终端， 其中： 所述核心网网元设置为： 在所述 MTC终端漫游到该核心网网元时， 将 所述核心网网元本地的允许接入时间段信息通知给所述 MTC终端； 所述 MTC终端设置为： 在获知所述核心网网元本地的允许接入时间段 信息后， 在需要接入到所述核心网网元时， 根据该允许接入时间段信息发起 接入请求。
12、如权利要求 11所述的系统， 其中， 所述核心网网元是设置为按如下 方式将所述核心网网元本地的允许接入时间段信息通知给所述 MTC终端： 在所述 MTC终端处于连接状态， 通过切换的方式漫游到所述核心网网 元时， 该核心网网元在接收到重定位请求消息后， 向所述 MTC终端的归属 网络的核心网网元发送重定位请求应答消息， 携带所述核心网网元本地的允 许接入时间段信息， 通过该重定位请求应答消息将所述本地的允许接入时间 段信息通知给所述 MTC终端； 或者 将所述核心网网元本地的允许接入时间段信息通知到该核心网网元所管 理的基站， 以使所述核心网网元所管理的基站将所述核心网网元本地的允许 接入时间段信息通过系统消息通知到所述 MTC终端。
13、 如权利要求 11所述的系统， 其中： 所述 MTC终端还设置为： 在处于空闲状态， 通过小区重选漫游到所述 核心网网元时， 向所述核心网网元发送接入请求消息； 所述核心网网元是设置为按如下方式将所述核心网网元本地的允许接入 时间段信息通知给所述 MTC终端： 在接收到所述接入请求消息后， 若允许 所述 MTC终端接入， 则通过非接入层 （NAS ) 消息将所述核心网网元本地 的允许接入时间段信息通知到所述 MTC终端；若不允许所述 MTC终端接入， 则在附着请求拒绝消息中将所述核心网网元本地的允许接入时间段信息通知 到所述 MTC终端。
14、 一种核心网网元， 其设置为： 当所述核心网网元为拜访网络的核心网网元时， 机器类型通信（MTC ) 终端在漫游到拜访网络时， 将所述拜访网络的核心网网元本地的允许接入时 间段信息通知给所述 MTC终端。
15、如权利要求 14所述的核心网网元， 其中， 所述核心网网元是设置为 按如下方式将所述拜访网络的核心网网元本地的允许接入时间段信息通知给 所述 MTC终端： 所述 MTC终端处于连接状态， 通过切换的方式漫游到所述拜访网络时， 该拜访网络的核心网网元在接收到重定位请求消息后， 向所述 MTC终端的 归属网络的核心网网元发送重定位请求应答消息， 携带所述拜访网络的核心 网网元本地的允许接入时间段信息， 通过该重定位请求应答消息将所述拜访 网络的核心网网元本地的允许接入时间段信息通知给所述 MTC终端； 或者 所述拜访网络的核心网网元将所述拜访网络的核心网网元本地的允许接 入时间段信息通知到该拜访网络的核心网网元所管理的基站， 以使所述拜访 网络的核心网网元所管理的基站将所述拜访网络的核心网网元本地的允许接 入时间段信息通过系统消息通知到所述 MTC终端； 或者 接收所述 MTC终端处于空闲状态且通过小区重选漫游到所述拜访网络 时， 向所述拜访网络的核心网网元发送的接入请求消息； 以及所述拜访网络 的核心网网元接收到所述接入请求消息后， 若允许所述 MTC终端接入， 则 通过非接入层（NAS ) 消息将所述拜访网络的核心网网元本地的允许接入时 间段信息通知给所述 MTC终端； 若不允许所述 MTC终端接入， 则在附着请 求拒绝消息中， 将所述拜访网络的核心网网元本地的允许接入时间段信息通 知给所述 MTC终端。
16、如权利要求 14所述的核心网网元， 其中， 所述核心网网元是设置为 按如下方式通过该重定位请求应答消息将所述拜访网络的核心网网元本地的 允许接入时间段信息通知给所述 MTC终端： 当所述核心网网元为归属网络的核心网网元时， 所述归属网络的核心网网元接收到所述重定位请求应答消息后， 若所述 MTC终端能够成功切入所述拜访网络， 则向该 MTC终端所属的基站发起切 换命令过程， 在该切换命令过程中将所述拜访网络的核心网网元本地的允许 接入时间段信息通知给所述基站， 以使该基站向所述 MTC终端发送无线资 源控制连接重配消息， 携带所述拜访网络本地的允许接入时间段信息； 所述归属网络的核心网网元接收到所述重定位请求应答消息后， 若所述 MTC 终端无法成功切入所述拜访网络， 则向所述基站发起切换准备失败过 程， 在该切换准备失败过程中将所述拜访网络本地的允许接入时间段信息通 知给所述基站， 以使该基站通过系统消息或寻呼消息将所述拜访网络的核心 网网元本地的允许接入时间段信息通知到所述 MTC终端。
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