WO2014041718A1 - Mobile communication terminal, communication control method, and non-transitory computer-readable medium storing communication control program - Google Patents

Mobile communication terminal, communication control method, and non-transitory computer-readable medium storing communication control program Download PDF

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Publication number
WO2014041718A1
WO2014041718A1 PCT/JP2013/002215 JP2013002215W WO2014041718A1 WO 2014041718 A1 WO2014041718 A1 WO 2014041718A1 JP 2013002215 W JP2013002215 W JP 2013002215W WO 2014041718 A1 WO2014041718 A1 WO 2014041718A1
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Prior art keywords
signaling connection
information
mobile communication
extension
communication network
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PCT/JP2013/002215
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French (fr)
Japanese (ja)
Inventor
敦司 清水
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日本電気株式会社
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Publication of WO2014041718A1 publication Critical patent/WO2014041718A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections

Definitions

  • the present invention relates to a mobile communication terminal, a communication control method, and a non-transitory computer-readable medium in which a communication control program is stored, and more particularly to a technique for extending a signaling connection.
  • 3GPP (3rd Generation Partnership Project) has been studying and creating mobile communication system specifications. In connection with this, the technique regarding 3GPP is also examined (for example, patent document 1).
  • this is a case where the mobile station side supports 3GPP® Release 8, and the base station side supports 3GPP® Release 5 or earlier.
  • the mobile station requests an extension (Follow-on) of the signaling connection by location registration (Attach) request)
  • the base station to notify the mobile device whether or not the signaling connection can be extended (Attach accept).
  • Attach accept the mobile device cannot recognize whether or not the signaling connection can be extended on the base station side, and the signaling connection processing state does not match with the base station side.
  • An object of the present invention is to provide a mobile communication terminal, a communication control method, and a communication control program capable of suppressing implementation of useless signaling in order to solve the above-described problems.
  • a mobile communication terminal is a mobile communication terminal that establishes a signaling connection in a mobile communication network and communicates with another terminal, and stores device specifying information for specifying the mobile communication network side device. And when the signaling connection is extended, the extension request information requesting extension of the signaling connection is transmitted to the mobile communication network side device to which the signaling connection is connected, and A connection extension processing unit that executes a signaling connection extension process; and when the mobile communication network side device determines that the signaling connection requested to be extended by the extension request information is not extended, the movement of the connection destination of the signaling connection An information control unit that stores device specifying information for specifying a communication network side device in the storage unit, and the connection extension processing unit moves the connection destination of the signaling connection when the signaling connection is extended. When it is determined that the communication network side device matches the mobile communication network side device specified by the device specifying information stored in the storage unit, execution of the extension process of the signaling connection in the own terminal is suppressed. Is.
  • a communication control method is a communication control method for establishing a signaling connection and communicating with another terminal in a mobile communication network, and extending the signaling connection when the signaling connection is extended. Is transmitted to the mobile communication network side device to which the signaling connection is connected, and a connection extension processing step for executing the extension processing of the signaling connection, and the extension request on the mobile communication network side An information control step of storing, in a storage unit, device specifying information for specifying the mobile communication network side device to which the signaling connection is connected when it is determined that the signaling connection requested to be extended by information has not been extended.
  • connection extension processing step when extending the signaling connection, the mobile communication network side device to which the signaling connection is connected and the mobile communication network specified by the device specifying information stored in the storage unit When it is determined that the side device matches, execution of the extension process of the signaling connection is suppressed.
  • a communication control program is a communication control program for establishing a signaling connection in a mobile communication network and communicating with another terminal, and extending the signaling connection when extending the signaling connection. Is transmitted to the mobile communication network side apparatus to which the signaling connection is connected, and the extension request information is executed on the mobile communication network side. If the signaling connection requested to be extended is determined not to be extended, information control processing for storing device specifying information for specifying the mobile communication network side device to which the signaling connection is connected in the storage unit is transferred. In the connection extension process, when the signaling connection is extended, it is specified by the mobile communication network side device to which the signaling connection is connected and the device specifying information stored in the storage unit. When it is determined that the mobile communication network side device matches, execution of the signaling connection extension processing is suppressed.
  • 5 is a flowchart showing an operation of the mobile communication system (an operation of a mobile station and a base station side apparatus in which a signaling connection has been successfully extended in the past) according to the embodiment of the present invention.
  • 5 is a flowchart showing an operation of the mobile communication system (an operation of a mobile station and a base station side apparatus that has failed to extend a signaling connection in the past) according to the embodiment of the present invention.
  • 6 is a flowchart showing an operation when the embodiment of the present invention is not applied (operation between a mobile device and a base station side device in which extension of a signaling connection has failed in the past).
  • It is a block diagram which shows the mobile communication terminal used as the outline
  • FIG. 1 is a block diagram showing a configuration of a mobile communication system 1 according to an embodiment of the present invention.
  • the mobile communication system 1 includes a mobile device 10 and a base station 20.
  • the mobile device 10 and the base station 20 perform wireless communication according to 3GPP specifications.
  • the mobile device 10 establishes a wireless connection (signaling connection) in the mobile communication network including the base station 20 via the base station 20 in accordance with the 3GPP specification, and transmits packets to and from other mobile devices and information processing devices. Replace.
  • the information processing apparatus is, for example, a personal computer or a server.
  • the mobile device 10 is, for example, a mobile phone.
  • the mobile phone includes a so-called smartphone.
  • the mobile device 10 is also called UE (User (Equipment).
  • the base station 20 includes a mobile station 10, a radio network controller (RNC: Radio Network Controller), a packet switch (SGSN: Serving GPRS Support Node, or MME: Mobility Management Entity) connected to the base station 20 and the like. Relay data sent and received between them.
  • the base station 20 is eNB (evolved (Node B), for example.
  • FIG. 2 is a flowchart showing processing of the mobile communication system 1 according to the embodiment of the present invention.
  • the mobile device 10 requests the base station 20 side (the mobile communication network side beyond the base station 20) to establish a signaling connection, and the description starts from the state where the signaling connection is established (S1).
  • the mobile device 10 requests the base station 20 side apparatus (for example, SGSN or MME) to which the signaling connection is connected to extend the signaling connection (S2).
  • the base station 20 side apparatus accepts the request for extension of the signaling connection from the mobile device 10 (S3).
  • the mobile device 10 specifies base station information for identifying the connection destination base station 20 side device of the signaling connection that is currently the extension target, and specifies the base station 20 side device of the connection destination of the signaling connection that failed to be extended in the past. By performing the matching process with the base station information, whether or not the base station 20 side device to which the current signaling connection to be extended is the same as the base station 20 side device that has failed to extend the signaling connection in the past. (S4).
  • the base station information of the current signaling connection to be extended is acquired in response to the signaling connection extension request (S2) from the base station 20, and the base station information of the signaling connection that has failed to be extended in the past is:
  • S2 signaling connection extension request
  • S2 signaling connection extension request
  • base station information of the signaling connection that has failed to be extended in the past is:
  • the mobile device 10 When it is determined that the base station 20 side device to which the current signaling connection to be extended is the same as the base station 20 side device that failed to extend the signaling connection in the past (S4: same base station), the mobile device 10 inhibits the signaling connection extension process (S5).
  • the base station 20 side device is a device that fails to extend the signaling connection (device that does not support extension of the signaling connection). Therefore, the base station 20 side device releases the signaling connection (S6).
  • the mobile device 10 After release of the signaling connection by the base station 20 side device (S6), or determination is made that the base station 20 side device to which the current signaling connection is connected is different from the base station 20 side device that failed to extend the signaling connection in the past In the case (S4: different base station side device), the mobile device 10 connects a signaling connection (S7). Specifically, the mobile device 10 performs a new signaling connection connection process after the release of the signaling connection by the base station 20 side device (S6) (S7).
  • connection processing of the signaling connection to be extended is performed (S7).
  • the base station information for identifying the base station 20 side device that is the connection destination (extension request destination) of the signaling connection is recorded.
  • the base station side 20 device to which the signaling connection extension is requested is a device that fails to extend the signaling connection. According to this, it becomes possible to grasp in advance the base station side 20 device that does not have a signaling connection extension function, and to suppress useless signaling (signaling connection extension processing).
  • this embodiment will be described in more detail.
  • FIG. 3 is a block diagram showing the configuration of the mobile device 10 according to the embodiment of the present invention.
  • the mobile device 10 includes a control unit 11, a storage unit 12, and a communication unit 13.
  • the control unit 11 comprehensively controls the entire mobile device 10. Specifically, the control unit 11 is realized by the CPU of the mobile device 10 executing a program that causes a CPU (Central Processing Unit) to execute processing for overall control of the mobile device 10.
  • a CPU Central Processing Unit
  • the storage unit 12 stores various data used by the control unit 11 and programs executed by the control unit 11. For example, the storage unit 12 stores the base station information described above as one of the various data.
  • the storage unit 12 includes one or more arbitrary storage devices that can store these data, programs, and the like.
  • the storage device is, for example, a memory and a hard disk.
  • the communication unit 13 transmits various data output from the control unit 11 to the base station 20.
  • the communication unit 13 receives various data transmitted from the base station 20 side and outputs the data to the control unit 11.
  • the communication unit 13 is a communication device that transmits and receives data while converting the data into a format that can be processed by the mobile device 10 and the mobile communication network.
  • FIG. 4 is a flowchart showing signaling connection extension result storage processing of the mobile device 10 according to the embodiment of the present invention.
  • the control unit 11 of the mobile device 10 When requesting extension of the signaling connection to the base station 20 side, the control unit 11 of the mobile device 10 generates location registration information (Attach request (Follow-on)) requesting extension of the signaling connection, and the communication unit 13 to the base station 20 side (S10).
  • the location registration information is an “Attach request” message in the 3GPP specification.
  • “Follow-on” in the location registration information (Attach request (Follow-on)) is “Follow-on” in order to request the extension of the signaling connection in the IE (Information) Element) information in the “Attach request” message.
  • -on ⁇ ⁇ request ”bit is set to On.
  • the base station 20 In response to the reception of the location registration information, the base station 20 generates location registration acceptance information (Attach accept) for notifying acceptance of the location registration request, and transmits the location registration acceptance information to the mobile device 10.
  • S10 correspond
  • the control unit 11 of the mobile device 10 receives the location registration acceptance information (Attach accept (spare0)) transmitted from the base station 20 side via the communication unit 13.
  • the location registration acceptance information is an “Attach accept” message in the 3GPP specification.
  • “spare0” in the location registration acceptance information (Attach accept (spare0)) is set when the base station 20 side cannot return whether or not the signaling connection can be extended in the IE information in the “Attach accept” message. Indicates that information is set. That is, here, a case has been described in which the base station 20 side is compatible with a release (for example, a release before 3GPP Release 5) in which it is not possible to reply whether or not the signaling connection can be extended.
  • the control unit 11 of the mobile device 10 acquires base station information from the received location registration acceptance information (Attach accept (spare0)) (S11).
  • the base station information may be any information as long as it is information that can identify the base station 20 side device among the IE information included in the “Attach accept” message.
  • IE information indicating a PLMN (Public Land Mobile Mobile Network) used in a signaling connection IE information indicating a cell used in the signaling connection, and a frequency used in the signaling connection
  • At least one piece of IE information may be used out of the IE information indicating the above.
  • IE information used as base station information is not limited to the example given here.
  • the control unit 11 generates disconnection presence / absence information indicating whether or not the signaling connection is disconnected according to the disconnection result of the signaling connection from the base station 20 side (S12). Stores the generated disconnection presence / absence information in the storage unit 12 in association with the acquired base station information (S13). That is, although the signaling connection destination base station 20 side apparatus is requested to extend the signaling connection, the signaling connection is not extended but is disconnected from the base station 20 side apparatus. In the case (when extension of the signaling connection fails), the control unit 11 generates disconnection presence / absence information indicating that the signaling connection has been disconnected.
  • the control unit 11 transmits the location registration information (Attach ⁇ ⁇ request (Follow-on)) requesting extension of the signaling connection
  • the signaling connection is disconnected before a predetermined time elapses.
  • a disconnection presence / absence information indicating that the signaling connection has been disconnected is generated, and if the signaling connection has not been disconnected until a predetermined time has elapsed, it indicates that the signaling connection has not been disconnected.
  • the cutting presence / absence information may be generated. Note that this predetermined time is generally set to an arbitrary time with a sufficient expectation of the time until the signaling connection is considered to be disconnected when the signaling connection is not extended. Good.
  • control unit 11 determines whether or not the signaling connection has been disconnected depending on whether or not release request information (RRC connection release) requesting release of the signaling connection is transmitted from the base station 20 side to the mobile device 10. To do. More specifically, the location registration acceptance information is an “RRC connection release” message in the 3GPP specifications. S11 to S13 correspond to S3 in FIG.
  • base station information and disconnection presence / absence information stored in the storage unit 12 is shown with reference to FIG.
  • base station information for specifying a base station 20 side device, and disconnection presence / absence information indicating whether or not a signaling connection is disconnected after a request for extending a signaling connection with the base station 20 side device as a connection destination And are stored in the storage unit 12.
  • the base station 20 side device that is the connection destination of the signaling connection responds to the request for extension of the past signaling connection.
  • the signaling connection is normally extended without being disconnected.
  • the base station 20 side device to which the signaling connection is connected responds to a request for extension of the past signaling connection. It indicates that the signaling connection has been disconnected.
  • the connection destination of the signaling connection has a function to extend the signaling connection in response to a request for extension of the signaling connection, and uses a cell ID “2” cell and a PLMN ID “YYY” PLMN.
  • the base station 20 side device that is the connection destination of the signaling connection does not have a function of extending the signaling connection in response to a request for extending the signaling connection.
  • the mobile station 10 when the mobile station 10 wants to extend the signaling connection by referring to the base station information and the disconnection presence / absence information stored in the storage unit 12, the mobile station 10 side sets the signaling connection. Whether the extension process may be performed or the signaling connection from the base station 20 side is disconnected, so it is determined whether the connection process of a new signaling connection should be performed after waiting for the disconnection of the signaling connection It becomes possible.
  • FIG. 6 is a flowchart showing the signaling connection extension process execution determination process of the mobile device 10 according to the embodiment of the present invention.
  • the control unit 11 of the mobile device 10 acquires base station information from the received location registration acceptance information (Attach accept (spare0)) (S20).
  • S20 corresponds to S3 in FIG. 2 and S11 in FIG.
  • the control unit 11 acquires the base station information acquired in the past and the disconnection presence / absence information associated with the base station information from the storage unit 12 (S21).
  • the control unit 11 compares the base station information acquired in step S20 with the base station information stored in the storage unit 12, thereby disconnecting the base station information acquired in step S20 and the signaling connection. It is determined whether or not the disconnection presence / absence information indicating the base station information associated with the disconnection presence / absence information matches (S22). S21 and S22 correspond to S4 in FIG. For example, as shown in FIG. 5, when the base station information indicates a cell and a PLMN, both the cell and the PLMN are between the base station information acquired in step S20 and the base station information stored in the storage unit 12. If the base station information matches, the base station information is determined to match.
  • step S20 When the base station information acquired in step S20 matches the base station information associated with the disconnection presence / absence information indicating that the signaling connection is disconnected (S22: match), the control unit 11 extends the signaling connection. Implementation of signaling related to the processing is suppressed (S23). Note that S23 corresponds to S5 in FIG.
  • the base station 20 side device to which the signaling connection is connected determines whether the base station 20 side device to which the signaling connection is connected is based on the past performance of the signaling connection indicated by the base station information and disconnection presence / absence information stored in the storage unit 12. It becomes possible to determine whether or not the connection can be extended. As a result, when the base station 20 side apparatus that cannot perform the extension of the signaling connection is the connection destination of the signaling connection, the base station 20 side apparatus recognizes it and suppresses the signaling related to the extension process of the signaling connection. It becomes possible.
  • the base station information matches, If the similarity of the base station information is determined to be greater than or equal to a predetermined degree by using a probabilistic method, it may be determined that the base station information matches.
  • FIG. 7 is a flowchart showing the operation of the mobile communication system 1 according to the embodiment of the present invention (the throat operation between the mobile station 10 and the base station 20 side apparatus in which the signaling connection has been successfully extended in the past).
  • the control unit 11 of the mobile device 10 When extending a signaling connection established with the base station 20 side, the control unit 11 of the mobile device 10 sends location registration request information (Attach request (Follow-on)) via the communication unit 13 to the base station. It transmits to the 20 side (S100).
  • the base station 20 side transmits location registration acceptance information (Attach accept (spare0)) to the mobile device 10 in response to reception of location registration request information (Attach request (Follow-on)) from the mobile device 10 (S101). .
  • the control unit 11 of the mobile device 10 includes base station information acquired from the location registration acceptance information (Attach accept (spare0)) received from the base station 20 side via the communication unit 13 and the base station stored in the storage unit 12. Based on the information and disconnection presence / absence information, it is determined whether or not the base station 20 side device to which the signaling connection is connected (extension request destination) is a base station 20 side device that has failed to extend the signaling connection in the past. (S102). As described above, here, since the base station 20 side device is the base station 20 side device in which the signaling connection has been successfully extended in the past, the control unit 11 allows the base station 20 side device to It is determined that it is not the base station 20 side device that failed to extend.
  • release request information (RRC connection release) is not transmitted from the base station 20 side to the mobile device 10. Therefore, the control unit 11 of the mobile device 10 performs a signaling connection extension process. Specifically, the control unit 11 transmits connection request information (active PDP context request) at the time of extension of the signaling connection to the base station 20 side via the communication unit 13 in accordance with 3GPP specifications (S103). Specifically, the connection request information (active PDP context request) is an “active PDP context request” message in the 3GPP specifications.
  • the RRC connection release message is not transmitted from the base station 20 side, and the signaling connection is established between the mobile device 10 and the base station 20 side. Processing status will not be inconsistent. Therefore, the mobile device 10 transmits an active PDP context request message to the base station 20 side.
  • FIG. 8 is a flowchart showing the operation of the mobile communication system 1 according to the embodiment of the present invention (the throat operation between the mobile station 10 and the base station 20 side apparatus that has failed to extend the signaling connection in the past).
  • the control unit 11 of the mobile device 10 When extending a signaling connection established with the base station 20 side, the control unit 11 of the mobile device 10 sends location registration request information (Attach request (Follow-on)) via the communication unit 13 to the base station. It transmits to the 20 side (S200). In response to receiving location registration request information (Attachttarequest (Follow-on)) from the mobile device 10, the base station 20 transmits location registration acceptance information (Attach accept (spare0)) to the mobile device 10 (S201). .
  • location registration request information Attach request (Follow-on)
  • the base station 20 In response to receiving location registration request information (Attachttarequest (Follow-on) from the mobile device 10, the base station 20 transmits location registration acceptance information (Attach accept (spare0)) to the mobile device 10 (S201). .
  • the control unit 11 of the mobile device 10 includes base station information acquired from the location registration acceptance information (Attach accept (spare0)) received from the base station 20 side via the communication unit 13 and the base station stored in the storage unit 12. Based on the information and the disconnection presence / absence information, the base station 20 side device is a base station 20 side device that has failed to extend the signaling connection in the past. It is determined whether or not there is (S202). As described above, here, since the base station 20 side device is the base station 20 side device in which the extension of the signaling connection has failed in the past, the control unit 11 allows the base station 20 side device to It is determined that the base station 20 side apparatus has failed to be extended.
  • the control unit 11 suppresses the implementation of signaling related to the signaling connection extension process (S203). Specifically, the control unit 11 suppresses transmission of connection request information (active PDP context request) to the base station 20 when the signaling connection is extended.
  • the base station 20 side transmits release request information (RRC connection release) to the mobile device 10 in response to the expiration of the signaling connection period (S204).
  • the control unit 11 of the mobile device 10 After receiving the release request information (RRC ⁇ ⁇ connection release) from the base station 20 side, the control unit 11 of the mobile device 10 newly performs a signaling connection connection process. Specifically, the mobile device 10 transmits connection request information (active PDP context request) at the time of new connection of the signaling connection to the base station 20 side via the communication unit 13 in accordance with the 3GPP specification (S205).
  • the RRC connection release message is transmitted from the base station 20 side.
  • the signaling connection processing state becomes inconsistent between the mobile device 10 and the base station 20 side. Therefore, the mobile device 10 suppresses transmission of the active PDP context request message to the base station 20 side.
  • FIG. 9 is a flowchart showing an operation (an operation between the mobile station 10 and the base station 20 side apparatus in which the extension of the signaling connection has failed in the past) when the embodiment of the present invention is not applied.
  • the mobile device 10 When extending the signaling connection established with the base station 20 side, the mobile device 10 transmits location registration request information (Attach request (Follow-on)) to the base station 20 side (S300).
  • the base station 20 side transmits location registration acceptance information (Attach accept (spare0)) to the mobile device 10 in response to receiving location registration request information (Attach request (Follow-on)) from the mobile device 10 (S301). .
  • connection request information active PDP context request
  • the base station 20 side device that is the connection destination (extension request destination) of the signaling connection does not support the extension of the signaling connection.
  • Information (RRC connection release) is transmitted to the mobile device 10 (S303). That is, the expected operation differs between the base station 20 side (expecting disconnection of signaling connection) and the mobile station 10 side (expecting extension connection of signaling connection).
  • the mobile device 10 discards the connection request information (active PDP context request) being transmitted and disconnects the signaling connection according to the release request information (RRC connection release) from the base station 20 side. . Therefore, it becomes necessary for the mobile device 10 to newly execute a signaling connection connection process.
  • the mobile device 10 since it is possible to determine whether or not a signaling connection can be extended using past signaling connection extension results, the mobile device 10 is immediately disconnected. It is possible to avoid unnecessary signaling. In particular, in a country or region where old and new base station 20 side devices (for example, a base station 20 side device corresponding to 3GPP Release 8 and a base station 20 side device corresponding to 3GPP Release 5) are mixed, the mobile station 10 Unnecessary access from the (mobile phone) to the base station 20 can be reduced, and reduction of useless radio resources can be expected.
  • old and new base station 20 side devices for example, a base station 20 side device corresponding to 3GPP Release 8 and a base station 20 side device corresponding to 3GPP Release 5
  • the mobile station 10 Unnecessary access from the (mobile phone) to the base station 20 can be reduced, and reduction of useless radio resources can be expected.
  • FIG. 10 is a block diagram showing a mobile communication terminal as a schematic configuration of the mobile device 10 according to the embodiment of the present invention.
  • the mobile communication terminal 9 includes a storage unit 90, a connection extension processing unit 91, and an information control unit 92.
  • the mobile communication terminal 9 is a mobile communication terminal that establishes a signaling connection in a mobile communication network and communicates with other terminals. Other terminals correspond to other mobile devices and information processing devices of the mobile device 10.
  • the storage unit 90 stores device specifying information for specifying a mobile communication network side device.
  • the storage unit 90 corresponds to the storage unit 12.
  • the device specifying information corresponds to the base station information.
  • the connection extension processing unit 91 transmits extension request information for requesting extension of the signaling connection to the mobile communication network side device to which the signaling connection is connected, The extension process of the signaling connection is executed.
  • the information control unit 92 determines that the signaling connection requested to be extended by the extension request information is not extended in the mobile communication network side device, the information control unit 92 sets device specifying information for specifying the mobile communication network side device to which the signaling connection is connected. Store in the storage unit 90.
  • the connection extension processing unit 91 when extending a signaling connection, the mobile communication network side device to which the signaling connection is connected, the mobile communication network side device specified by the device specifying information stored in the storage unit 90, Are determined to match, the execution of the extension process of the signaling connection in the own terminal is suppressed.
  • the mobile communication network side device corresponds to the base station 20 side device.
  • the extension request information corresponds to the Attach request message.
  • the connection extension processing unit 91 and the information control unit 92 correspond to the control unit 11.
  • the base station information and the disconnection presence / absence information are associated with each other and stored in the storage unit 12, and the base station information acquired in response to the request for extending the signaling connection and the disconnection indicating that the signaling connection has been disconnected
  • the base station information associated with the presence / absence information is compared to detect the base station 20 side device that does not support extension of the signaling connection, the present invention is not limited to this.
  • only base station information specifying the base station 20 side device that has failed to extend the signaling connection in the past is stored in the storage unit 12, and the base station information acquired in response to the request for extension of the signaling connection and the storage unit When it is determined that the base station information stored in 12 matches, the signaling connection extension process in the mobile device 10 may be suppressed.
  • Non-transitory computer readable media include various types of tangible storage media (tangible storage medium). Examples of non-transitory computer-readable media include magnetic recording media (eg flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (eg magneto-optical discs), CD-ROMs (Read Only Memory), CD-Rs, CD-R / W, semiconductor memory (for example, mask ROM, PROM (Programmable ROM), EPROM (Erasable ROM), flash ROM, RAM (Random Access Memory)) are included.
  • magnetic recording media eg flexible disks, magnetic tapes, hard disk drives
  • magneto-optical recording media eg magneto-optical discs
  • CD-ROMs Read Only Memory
  • CD-Rs Compact Only Memory
  • CD-Rs Compact ROM
  • CD-R / W semiconductor memory
  • semiconductor memory for example, mask ROM, PROM (Programmable ROM), EPROM (Erasable ROM), flash ROM, RAM (Random Access Memory)
  • the program may also be supplied to the computer by various types of temporary computer-readable media.
  • Examples of transitory computer readable media include electrical signals, optical signals, and electromagnetic waves.
  • the temporary computer-readable medium can supply the program to the computer via a wired communication path such as an electric wire and an optical fiber, or a wireless communication path.

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
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Abstract

A mobile communication terminal (9) according to the present invention is provided with: a storage unit (90); a connection extension processing unit (91) that transmits extension request information requesting signaling connection extension to a mobile communication network-side device as a connection destination for a signaling connection, and that implements a signaling connection extension process; and an information control unit (92) that, when the signaling connection of which extension has been requested by the extension request information is not extended in the mobile communication network-side device, stores device identification information identifying the mobile communication network-side device as the connection destination for the signaling connection in the storage unit (90). The connection extension processing unit (91), when extending the signaling connection, restrains the implementation of the signaling connection extension process when the mobile communication network-side device as the connection destination for the signaling connection corresponds to the mobile communication network-side device identified by the device identification information stored in the storage unit (90).

Description

移動通信端末、通信制御方法、及び通信制御プログラムが格納された非一時的なコンピュータ可読媒体Mobile communication terminal, communication control method, and non-transitory computer-readable medium storing a communication control program
　本発明は、移動通信端末、通信制御方法、及び通信制御プログラムが格納された非一時的なコンピュータ可読媒体に関し、特に、シグナリングコネクションを延長する技術に関する。 The present invention relates to a mobile communication terminal, a communication control method, and a non-transitory computer-readable medium in which a communication control program is stored, and more particularly to a technique for extending a signaling connection.
　3GPP(3rd Generation Partnership Project)によって、移動通信システムの仕様の検討・作成が行われてきている。これに伴い、3GPPに関する技術も検討されてきている(例えば、特許文献１)。 3GPP (3rd Generation Partnership Project) has been studying and creating mobile communication system specifications. In connection with this, the technique regarding 3GPP is also examined (for example, patent document 1).
特表２００７－５２４３０２号公報Special table 2007-524302
　しかしながら、現状の3GPPの仕様では、移動機が位置登録によってパケット交換シグナリングコネクションの延長(Follow-on)を要求しているのに、基地局側がシグナリングコネクションの延長をさせない場合がある。その場合には、移動機と基地局側の双方が相反するシグナリングコネクション処理状態となり、不具合(シグナリングコネクションの切断)が発生する。シグナリングコネクションが切断された場合、移動機は、新たなシグナリングコネクションの接続をするため、無駄な無線リソースの消費が発生する。 However, in the current 3GPP specifications, there are cases where the base station side does not extend the signaling connection even though the mobile station requests extension (Follow-on) of the packet exchange signaling connection by location registration. In that case, both the mobile station and the base station side are in a conflicting signaling connection processing state, and a malfunction (disconnection of the signaling connection) occurs. When the signaling connection is disconnected, the mobile device connects a new signaling connection, and thus wasteful use of radio resources occurs.
　例えば、移動機側が3GPP Release8に対応しており、基地局側が3GPP Release5以前に対応している場合である。この場合、移動機が、位置登録(Attach request)によってシグナリングコネクションの延長(Follow-on)を要求したときに、基地局が、シグナリングコネクションの延長の可否を移動機に伝える方法が無い(Attach acceptにおいてFollow-onが定義されていない)。そのため、移動機は、基地局側でのシグナリングコネクションの延長可否を認識することができず、基地局側との間でシグナリングコネクション処理状態が不一致となってしまう。その結果、移動機がシグナリングコネクションの延長処理を実施しても、その途中でシグナリングコネクションが切断されてしまい、移動機が新規にシグナリングコネクションの接続処理を実施する必要が生じてしまうという課題がある。すなわち、無駄なシグナリング(シグナリングコネクションの延長処理)を実施することになってしまうという課題がある。 For example, this is a case where the mobile station side supports 3GPP® Release 8, and the base station side supports 3GPP® Release 5 or earlier. In this case, when the mobile station requests an extension (Follow-on) of the signaling connection by location registration (Attach) request), there is no method for the base station to notify the mobile device whether or not the signaling connection can be extended (Attach accept). Follow-on is not defined in). Therefore, the mobile device cannot recognize whether or not the signaling connection can be extended on the base station side, and the signaling connection processing state does not match with the base station side. As a result, even if the mobile station performs the signaling connection extension process, the signaling connection is disconnected in the middle of the process, and the mobile station needs to newly execute the signaling connection connection process. . That is, there is a problem in that useless signaling (signaling connection extension processing) is performed.
　本発明の目的は、上述したような課題を解決するために、無駄なシグナリングの実施を抑止することができる移動通信端末、通信制御方法、及び通信制御プログラムを提供することである。 An object of the present invention is to provide a mobile communication terminal, a communication control method, and a communication control program capable of suppressing implementation of useless signaling in order to solve the above-described problems.
　本発明の第１の態様にかかる移動通信端末は、移動通信ネットワークにおいてシグナリングコネクションを確立して他端末と通信する移動通信端末であって、前記移動通信ネットワーク側装置を特定する装置特定情報が格納される記憶部と、前記シグナリングコネクションを延長するときに、当該シグナリングコネクションの延長を要求する延長要求情報を、当該シグナリングコネクションの接続先の前記移動通信ネットワーク側装置に送信するとともに、自端末における当該シグナリングコネクションの延長処理を実行する接続延長処理部と、前記移動通信ネットワーク側装置において前記延長要求情報で延長を要求したシグナリングコネクションが延長されなかったと判定した場合、当該シグナリングコネクションの接続先の前記移動通信ネットワーク側装置を特定する装置特定情報を前記記憶部に格納する情報制御部と、を備え、前記接続延長処理部は、前記シグナリングコネクションを延長するときに、当該シグナリングコネクションの接続先の前記移動通信ネットワーク側装置と、前記記憶部に格納された装置特定情報によって特定される前記移動通信ネットワーク側装置と、が一致すると判定した場合、前記自端末における当該シグナリングコネクションの延長処理の実行を抑止するものである。 A mobile communication terminal according to a first aspect of the present invention is a mobile communication terminal that establishes a signaling connection in a mobile communication network and communicates with another terminal, and stores device specifying information for specifying the mobile communication network side device. And when the signaling connection is extended, the extension request information requesting extension of the signaling connection is transmitted to the mobile communication network side device to which the signaling connection is connected, and A connection extension processing unit that executes a signaling connection extension process; and when the mobile communication network side device determines that the signaling connection requested to be extended by the extension request information is not extended, the movement of the connection destination of the signaling connection An information control unit that stores device specifying information for specifying a communication network side device in the storage unit, and the connection extension processing unit moves the connection destination of the signaling connection when the signaling connection is extended. When it is determined that the communication network side device matches the mobile communication network side device specified by the device specifying information stored in the storage unit, execution of the extension process of the signaling connection in the own terminal is suppressed. Is.
　本発明の第２の態様にかかる通信制御方法は、移動通信ネットワークにおいてシグナリングコネクションを確立して他端末と通信する通信制御方法であって、前記シグナリングコネクションを延長するときに、当該シグナリングコネクションの延長を要求する延長要求情報を、当該シグナリングコネクションの接続先の前記移動通信ネットワーク側装置に送信するとともに、当該シグナリングコネクションの延長処理を実行する接続延長処理ステップと、前記移動通信ネットワーク側において前記延長要求情報で延長を要求したシグナリングコネクションが延長されなかったと判定した場合、当該シグナリングコネクションの接続先の前記移動通信ネットワーク側装置を特定する装置特定情報を記憶部に格納する情報制御ステップと、を備え、前記接続延長処理ステップでは、前記シグナリングコネクションを延長するときに、当該シグナリングコネクションの接続先の前記移動通信ネットワーク側装置と、前記記憶部に格納された装置特定情報によって特定される前記移動通信ネットワーク側装置と、が一致すると判定した場合、当該シグナリングコネクションの延長処理の実行を抑止するものである。 A communication control method according to a second aspect of the present invention is a communication control method for establishing a signaling connection and communicating with another terminal in a mobile communication network, and extending the signaling connection when the signaling connection is extended. Is transmitted to the mobile communication network side device to which the signaling connection is connected, and a connection extension processing step for executing the extension processing of the signaling connection, and the extension request on the mobile communication network side An information control step of storing, in a storage unit, device specifying information for specifying the mobile communication network side device to which the signaling connection is connected when it is determined that the signaling connection requested to be extended by information has not been extended. In the connection extension processing step, when extending the signaling connection, the mobile communication network side device to which the signaling connection is connected and the mobile communication network specified by the device specifying information stored in the storage unit When it is determined that the side device matches, execution of the extension process of the signaling connection is suppressed.
　本発明の第３の態様にかかる通信制御プログラムは、移動通信ネットワークにおいてシグナリングコネクションを確立して他端末と通信する通信制御プログラムであって、前記シグナリングコネクションを延長するときに、当該シグナリングコネクションの延長を要求する延長要求情報を、当該シグナリングコネクションの接続先の前記移動通信ネットワーク側装置に送信するとともに、当該シグナリングコネクションの延長処理を実行する接続延長処理と、前記移動通信ネットワーク側において前記延長要求情報で延長を要求したシグナリングコネクションが延長されなかったと判定した場合、当該シグナリングコネクションの接続先の前記移動通信ネットワーク側装置を特定する装置特定情報を記憶部に格納する情報制御処理と、を移動通信端末に実行させ、前記接続延長処理では、前記シグナリングコネクションを延長するときに、当該シグナリングコネクションの接続先の前記移動通信ネットワーク側装置と、前記記憶部に格納された装置特定情報によって特定される前記移動通信ネットワーク側装置と、が一致すると判定した場合、当該シグナリングコネクションの延長処理の実行を抑止するものである。 A communication control program according to a third aspect of the present invention is a communication control program for establishing a signaling connection in a mobile communication network and communicating with another terminal, and extending the signaling connection when extending the signaling connection. Is transmitted to the mobile communication network side apparatus to which the signaling connection is connected, and the extension request information is executed on the mobile communication network side. If the signaling connection requested to be extended is determined not to be extended, information control processing for storing device specifying information for specifying the mobile communication network side device to which the signaling connection is connected in the storage unit is transferred. In the connection extension process, when the signaling connection is extended, it is specified by the mobile communication network side device to which the signaling connection is connected and the device specifying information stored in the storage unit. When it is determined that the mobile communication network side device matches, execution of the signaling connection extension processing is suppressed.
　上述した本発明の各態様によれば、無駄なシグナリングの実施を抑止することができる移動通信端末、通信制御方法、及び通信制御プログラムを提供することができる。 According to each aspect of the present invention described above, it is possible to provide a mobile communication terminal, a communication control method, and a communication control program that can suppress implementation of useless signaling.
本発明の実施の形態にかかる移動通信システムの構成を示すブロック図である。It is a block diagram which shows the structure of the mobile communication system concerning embodiment of this invention. 本発明の実施の形態にかかる移動通信システムの処理を示すフローチャートである。It is a flowchart which shows the process of the mobile communication system concerning embodiment of this invention. 本発明の実施の形態にかかる移動機の構成を示すブロック図である。It is a block diagram which shows the structure of the mobile apparatus concerning embodiment of this invention. 本発明の実施の形態にかかる移動機のシグナリングコネクション延長結果記憶処理を示すフローチャートである。It is a flowchart which shows the signaling connection extension result storage process of the mobile apparatus concerning embodiment of this invention. 本発明の実施の形態にかかる記憶部に格納された基地局情報及び切断有無情報の一例を示す図である。It is a figure which shows an example of the base station information stored in the memory | storage part concerning embodiment of this invention, and cutting | disconnection presence information. 本発明の実施の形態にかかる移動機のシグナリングコネクション延長処理実施判定処理を示すフローチャートである。It is a flowchart which shows the signaling connection extension process execution determination process of the mobile apparatus concerning embodiment of this invention. 本発明の実施の形態にかかる移動通信システムの動作(移動機と、過去にシグナリングコネクションの延長が成功した基地局側装置とのど動作)を示すフローチャートである。5 is a flowchart showing an operation of the mobile communication system (an operation of a mobile station and a base station side apparatus in which a signaling connection has been successfully extended in the past) according to the embodiment of the present invention. 本発明の実施の形態にかかる移動通信システムの動作(移動機と、過去にシグナリングコネクションの延長が失敗した基地局側装置とのど動作)を示すフローチャートである。5 is a flowchart showing an operation of the mobile communication system (an operation of a mobile station and a base station side apparatus that has failed to extend a signaling connection in the past) according to the embodiment of the present invention. 本発明の実施の形態を適用しない場合における動作(移動機と、過去にシグナリングコネクションの延長が失敗する基地局側装置との動作)を示すフローチャートである。6 is a flowchart showing an operation when the embodiment of the present invention is not applied (operation between a mobile device and a base station side device in which extension of a signaling connection has failed in the past). 本発明の実施の形態にかかる移動機の概要構成となる移動通信端末を示すブロック図である。It is a block diagram which shows the mobile communication terminal used as the outline | summary structure of the mobile apparatus concerning embodiment of this invention.
　まず、図１を参照して、本発明の実施の形態にかかる移動通信システム１の構成について説明する。図１は、本発明の実施の形態にかかる移動通信システム１の構成を示すブロック図である。 First, the configuration of the mobile communication system 1 according to the embodiment of the present invention will be described with reference to FIG. FIG. 1 is a block diagram showing a configuration of a mobile communication system 1 according to an embodiment of the present invention.
　移動通信システム１は、移動機１０及び基地局２０を有する。移動機１０と基地局２０とは、3GPPの仕様に従って無線通信を行う。 The mobile communication system 1 includes a mobile device 10 and a base station 20. The mobile device 10 and the base station 20 perform wireless communication according to 3GPP specifications.
　移動機１０は、3GPPの仕様に従って、基地局２０を介して、基地局２０を含む移動通信ネットワークにおいて無線接続(シグナリングコネクション)を確立し、他の移動機及び情報処理装置等との間でパケットを交換する。ここで、情報処理装置とは、例えば、パーソナルコンピュータ及びサーバ等である。移動機１０は、例えば、携帯電話機である。携帯電話機には、いわゆるスマートフォンも含まれる。移動機１０は、UE(User Equipment)とも呼ばれる。 The mobile device 10 establishes a wireless connection (signaling connection) in the mobile communication network including the base station 20 via the base station 20 in accordance with the 3GPP specification, and transmits packets to and from other mobile devices and information processing devices. Replace. Here, the information processing apparatus is, for example, a personal computer or a server. The mobile device 10 is, for example, a mobile phone. The mobile phone includes a so-called smartphone. The mobile device 10 is also called UE (User (Equipment).
　基地局２０は、移動機１０と、基地局２０の先に接続される無線ネットワーク制御装置(RNC：Radio Network Controller)、パケット交換機(SGSN：Serving GPRS Support Node又はMME：Mobility Management Entity)等との間で送受信されるデータを中継する。基地局２０は、例えば、eNB(evolved Node B)である。 The base station 20 includes a mobile station 10, a radio network controller (RNC: Radio Network Controller), a packet switch (SGSN: Serving GPRS Support Node, or MME: Mobility Management Entity) connected to the base station 20 and the like. Relay data sent and received between them. The base station 20 is eNB (evolved (Node B), for example.
　続いて、図２を参照して、本発明の実施の形態にかかる移動通信システム１の処理について説明する。図２は、本発明の実施の形態にかかる移動通信システム１の処理を示すフローチャートである。 Subsequently, processing of the mobile communication system 1 according to the embodiment of the present invention will be described with reference to FIG. FIG. 2 is a flowchart showing processing of the mobile communication system 1 according to the embodiment of the present invention.
　移動機１０は、基地局２０側(基地局２０から先の移動通信ネットワーク側)に対してシグナリングコネクションの接続を要求し、シグナリングコネクションが確立された状態(Ｓ１)から説明する。移動機１０は、シグナリングコネクションを延長する場合、そのシグナリングコネクションの接続先の基地局２０側装置(例えば、SGSN又はMME等)に対してシグナリングコネクションの延長を要求する(Ｓ２)。基地局２０側装置は、移動機１０からのシグナリングコネクションの延長要求を受諾する(Ｓ３)。 The mobile device 10 requests the base station 20 side (the mobile communication network side beyond the base station 20) to establish a signaling connection, and the description starts from the state where the signaling connection is established (S1). When extending the signaling connection, the mobile device 10 requests the base station 20 side apparatus (for example, SGSN or MME) to which the signaling connection is connected to extend the signaling connection (S2). The base station 20 side apparatus accepts the request for extension of the signaling connection from the mobile device 10 (S3).
　移動機１０は、現在、延長対象としているシグナリングコネクションの接続先の基地局２０側装置を特定する基地局情報と、過去に延長に失敗したシグナリングコネクションの接続先の基地局２０側装置を特定する基地局情報とのマッチング処理を行うことで、現在の延長対象のシグナリングコネクションの接続先の基地局２０側装置が、過去にシグナリングコネクションの延長に失敗した基地局２０側装置と同一であるか否か判定する(Ｓ４)。ここで、現在の延長対象のシグナリングコネクションの基地局情報は、基地局２０側からのシグナリングコネクションの延長要求(Ｓ２)に対する応答で取得し、過去に延長に失敗したシグナリングコネクションの基地局情報は、シグナリングコネクションの延長に失敗したときに、そのシグナリングコネクションの基地局情報を移動機１０に保持しておく。これにより、移動機１０が、現在の延長対象のシグナリングコネクションの基地局情報と、過去に延長に失敗したシグナリングコネクションの基地局情報とをマッチング可能とする。 The mobile device 10 specifies base station information for identifying the connection destination base station 20 side device of the signaling connection that is currently the extension target, and specifies the base station 20 side device of the connection destination of the signaling connection that failed to be extended in the past. By performing the matching process with the base station information, whether or not the base station 20 side device to which the current signaling connection to be extended is the same as the base station 20 side device that has failed to extend the signaling connection in the past. (S4). Here, the base station information of the current signaling connection to be extended is acquired in response to the signaling connection extension request (S2) from the base station 20, and the base station information of the signaling connection that has failed to be extended in the past is: When extension of the signaling connection fails, base station information of the signaling connection is held in the mobile device 10. As a result, the mobile device 10 can match the base station information of the current signaling connection to be extended with the base station information of the signaling connection that failed to be extended in the past.
　現在の延長対象のシグナリングコネクションの接続先の基地局２０側装置が、過去にシグナリングコネクションの延長に失敗した基地局２０側装置と同一であると判定した場合(Ｓ４：同一基地局)、移動機１０は、シグナリングコネクション延長処理を抑止する(Ｓ５)。また、この場合、基地局２０側装置は、シグナリングコネクションの延長に失敗する装置(シグナリングコネクションの延長に対応していない装置)となる。そのため、基地局２０側装置は、シグナリングコネクションを解放する(Ｓ６)。 When it is determined that the base station 20 side device to which the current signaling connection to be extended is the same as the base station 20 side device that failed to extend the signaling connection in the past (S4: same base station), the mobile device 10 inhibits the signaling connection extension process (S5). In this case, the base station 20 side device is a device that fails to extend the signaling connection (device that does not support extension of the signaling connection). Therefore, the base station 20 side device releases the signaling connection (S6).
　基地局２０側装置によるシグナリングコネクションの解放(Ｓ６)後、又は、現在のシグナリングコネクションの接続先の基地局２０側装置が、過去にシグナリングコネクションの延長に失敗した基地局２０側装置と異なると判定した場合(Ｓ４：異なる基地局側装置)、移動機１０は、シグナリングコネクションを接続する(Ｓ７)。具体的には、移動機１０は、基地局２０側装置によるシグナリングコネクションの解放(Ｓ６)後の場合、新たなシグナリングコネクションの接続処理を行う(Ｓ７)。現在のシグナリングコネクションの接続先の基地局２０側装置が、過去にシグナリングコネクションの延長に失敗した基地局２０側装置と異なると判定した場合(Ｓ４：異なる基地局側装置)、シグナリングコネクション延長処理として、延長対象のシグナリングコネクションの接続処理を行う(Ｓ７)。 After release of the signaling connection by the base station 20 side device (S6), or determination is made that the base station 20 side device to which the current signaling connection is connected is different from the base station 20 side device that failed to extend the signaling connection in the past In the case (S4: different base station side device), the mobile device 10 connects a signaling connection (S7). Specifically, the mobile device 10 performs a new signaling connection connection process after the release of the signaling connection by the base station 20 side device (S6) (S7). When it is determined that the base station 20 side device to which the current signaling connection is connected is different from the base station 20 side device that failed to extend the signaling connection in the past (S4: different base station side device), as signaling connection extension processing Then, connection processing of the signaling connection to be extended is performed (S7).
　このように、本実施の形態では、シグナリングコネクションの延長に失敗したときに、そのシグナリングコネクションの接続先(延長要求先)の基地局２０側装置を特定する基地局情報を記録しておき、後にシグナリングコネクションを延長するときに、そのシグナリングコネクションの延長要求先の基地局側２０装置がシグナリングコネクションの延長に失敗してしまう装置であるか否かを判定することを可能としている。これによれば、シグナリングコネクションの延長機能を有していない基地局側２０装置を、事前に把握して、無駄なシグナリング(シグナリングコネクションの延長処理)を抑止することが可能となる。以下、本実施の形態について、より詳細に説明していく。 As described above, in the present embodiment, when the extension of the signaling connection fails, the base station information for identifying the base station 20 side device that is the connection destination (extension request destination) of the signaling connection is recorded. When extending a signaling connection, it is possible to determine whether or not the base station side 20 device to which the signaling connection extension is requested is a device that fails to extend the signaling connection. According to this, it becomes possible to grasp in advance the base station side 20 device that does not have a signaling connection extension function, and to suppress useless signaling (signaling connection extension processing). Hereinafter, this embodiment will be described in more detail.
　続いて、図３を参照して、本発明の実施の形態にかかる移動機１０の構成について説明する。図３は、本発明の実施の形態にかかる移動機１０の構成を示すブロック図である。 Subsequently, the configuration of the mobile device 10 according to the embodiment of the present invention will be described with reference to FIG. FIG. 3 is a block diagram showing the configuration of the mobile device 10 according to the embodiment of the present invention.
　移動機１０は、制御部１１、記憶部１２、及び通信部１３を有する。 The mobile device 10 includes a control unit 11, a storage unit 12, and a communication unit 13.
　制御部１１は、移動機１０全体を統括的に制御する。具体的には、制御部１１は、移動機１０を統括的に制御する処理をCPU（Central Processing Unit）に実行させるプログラムを、移動機１０が有するCPUが実行することによって実現される。 The control unit 11 comprehensively controls the entire mobile device 10. Specifically, the control unit 11 is realized by the CPU of the mobile device 10 executing a program that causes a CPU (Central Processing Unit) to execute processing for overall control of the mobile device 10.
　記憶部１２は、制御部１１によって使用される各種データ、及び、制御部１１によって実行されるプログラム等が格納される。例えば、記憶部１２は、上記各種データの１つとして、上述した基地局情報が格納される。記憶部１２は、これらのデータ及びプログラム等を格納可能な、１つ以上の任意の記憶装置を含んで構成される。記憶装置は、例えば、メモリ及びハードディスク等である。 The storage unit 12 stores various data used by the control unit 11 and programs executed by the control unit 11. For example, the storage unit 12 stores the base station information described above as one of the various data. The storage unit 12 includes one or more arbitrary storage devices that can store these data, programs, and the like. The storage device is, for example, a memory and a hard disk.
　通信部１３は、制御部１１から出力された各種データを基地局２０に対して送信する。また、通信部１３は、基地局２０側から送信された各種データを受信して、制御部１１に出力する。すなわち、具体的には、通信部１３は、移動機１０内と、移動通信ネットワークとの間で、それぞれで処理し得る形式にデータを変換しつつ、データを送受信する通信デバイスである。 The communication unit 13 transmits various data output from the control unit 11 to the base station 20. In addition, the communication unit 13 receives various data transmitted from the base station 20 side and outputs the data to the control unit 11. Specifically, the communication unit 13 is a communication device that transmits and receives data while converting the data into a format that can be processed by the mobile device 10 and the mobile communication network.
　続いて、図４を参照して、本発明の実施の形態にかかる移動機１０のシグナリングコネクション延長結果記憶処理について説明する。図４は、本発明の実施の形態にかかる移動機１０のシグナリングコネクション延長結果記憶処理を示すフローチャートである。 Subsequently, the signaling connection extension result storing process of the mobile device 10 according to the embodiment of the present invention will be described with reference to FIG. FIG. 4 is a flowchart showing signaling connection extension result storage processing of the mobile device 10 according to the embodiment of the present invention.
　移動機１０の制御部１１は、基地局２０側に対してシグナリングコネクションの延長を要求する場合、シグナリングコネクションの延長を要求する位置登録情報(Attach request(Follow-on))を生成し、通信部１３を介して基地局２０側に送信する(Ｓ１０)。具体的には、位置登録情報は、3GPP仕様における「Attach request」メッセージとなる。ここで、位置登録情報(Attach request(Follow-on))における「Follow-on」とは、「Attach request」メッセージ内のIE(Information Element)情報において、シグナリングコネクションの延長を要求するために「Follow-on request」ビットがOnにされていることを示している。基地局２０側は、この位置登録情報の受信に応じて、位置登録要求の受諾を通知する位置登録受諾情報(Attach accept)を生成し、移動機１０に送信する。なお、Ｓ１０は、図２のＳ１に対応する。 When requesting extension of the signaling connection to the base station 20 side, the control unit 11 of the mobile device 10 generates location registration information (Attach request (Follow-on)) requesting extension of the signaling connection, and the communication unit 13 to the base station 20 side (S10). Specifically, the location registration information is an “Attach request” message in the 3GPP specification. Here, “Follow-on” in the location registration information (Attach request (Follow-on)) is “Follow-on” in order to request the extension of the signaling connection in the IE (Information) Element) information in the “Attach request” message. -on こ と request ”bit is set to On. In response to the reception of the location registration information, the base station 20 generates location registration acceptance information (Attach accept) for notifying acceptance of the location registration request, and transmits the location registration acceptance information to the mobile device 10. Note that S10 corresponds to S1 in FIG.
　移動機１０の制御部１１は、基地局２０側から送信された位置登録受諾情報(Attach accept(spare0))を、通信部１３を介して受信する。具体的には、位置登録受諾情報は、3GPP仕様における「Attach accept」メッセージとなる。ここで、位置登録受諾情報(Attach accept(spare0))における「spare0」とは、「Attach accept」メッセージ内のIE情報において、基地局２０側がシグナリングコネクションの延長の可否を返答できない場合に設定される情報が設定されていることを示している。すなわち、ここでは、基地局２０側が、シグナリングコネクションの延長の可否を返答することができないリリース(例えば、3GPP Release5以前のリリース)に対応している場合について説明している。 The control unit 11 of the mobile device 10 receives the location registration acceptance information (Attach accept (spare0)) transmitted from the base station 20 side via the communication unit 13. Specifically, the location registration acceptance information is an “Attach accept” message in the 3GPP specification. Here, “spare0” in the location registration acceptance information (Attach accept (spare0)) is set when the base station 20 side cannot return whether or not the signaling connection can be extended in the IE information in the “Attach accept” message. Indicates that information is set. That is, here, a case has been described in which the base station 20 side is compatible with a release (for example, a release before 3GPP Release 5) in which it is not possible to reply whether or not the signaling connection can be extended.
　移動機１０の制御部１１は、受信した位置登録受諾情報(Attach accept(spare0))から基地局情報を取得する(Ｓ１１)。ここで、基地局情報は、「Attach accept」メッセージ内に含まれるIE情報のうち、基地局２０側装置を特定することができる情報であれば、どのような情報を用いてもよい。例えば、基地局情報として、シグナリングコネクションで利用されているPLMN(Public Land Mobile Network)を示すIE情報、シグナリングコネクションで利用されているセルを示すIE情報、及び、前記シグナリングコネクションで利用されている周波数を示すIE情報のうち、少なくとも１つのIE情報を利用するようにしてよい。また、基地局情報として利用するIE情報は、ここで挙げた例に限られない。 The control unit 11 of the mobile device 10 acquires base station information from the received location registration acceptance information (Attach accept (spare0)) (S11). Here, the base station information may be any information as long as it is information that can identify the base station 20 side device among the IE information included in the “Attach accept” message. For example, as base station information, IE information indicating a PLMN (Public Land Mobile Mobile Network) used in a signaling connection, IE information indicating a cell used in the signaling connection, and a frequency used in the signaling connection At least one piece of IE information may be used out of the IE information indicating the above. In addition, IE information used as base station information is not limited to the example given here.
　制御部１１は、基地局２０側からのシグナリングコネクションの切断結果に応じて、シグナリングコネクションの切断があったか否かを示す切断有無情報を生成する(Ｓ１２)。は、生成した切断有無情報を、取得した基地局情報と関連付けて、記憶部１２に格納する(Ｓ１３)。すなわち、シグナリングコネクションの接続先の基地局２０側装置に対して、そのシグナリングコネクションの延長を要求したにも関わらず、そのシグナリングコネクションが延長されずに、基地局２０側装置から切断されてしまった場合（シグナリングコネクションの延長に失敗した場合）、制御部１１は、シグナリングコネクションの切断があったことを示す切断有無情報を生成する。一方、シグナリングコネクションの接続先の基地局２０側装置に対して、そのシグナリングコネクションの延長を要求した結果、そのシグナリングコネクションが延長されて、基地局２０側から切断されなかった場合、制御部１１は、シグナリングコネクションの切断がないことを示す切断有無情報を生成する。 The control unit 11 generates disconnection presence / absence information indicating whether or not the signaling connection is disconnected according to the disconnection result of the signaling connection from the base station 20 side (S12). Stores the generated disconnection presence / absence information in the storage unit 12 in association with the acquired base station information (S13). That is, although the signaling connection destination base station 20 side apparatus is requested to extend the signaling connection, the signaling connection is not extended but is disconnected from the base station 20 side apparatus. In the case (when extension of the signaling connection fails), the control unit 11 generates disconnection presence / absence information indicating that the signaling connection has been disconnected. On the other hand, as a result of requesting extension of the signaling connection to the base station 20 side apparatus to which the signaling connection is made, if the signaling connection is extended and is not disconnected from the base station 20 side, the control unit 11 Then, disconnection presence / absence information indicating that there is no disconnection of the signaling connection is generated.
　例えば、制御部１１は、シグナリングコネクションの延長を要求する位置登録情報(Attach request(Follow-on))を送信したときから、所定の時間が経過する前に、そのシグナリングコネクションの切断があった場合に、シグナリングコネクションの切断があったことを示す切断有無情報を生成し、所定の時間が経過するまでに、そのシグナリングコネクションの切断がなかった場合には、シグナリングコネクションの切断がなかったことを示す切断有無情報を生成するようにすればよい。なお、この所定の時間は、一般的に、シグナリングコネクションが延長されなかった場合に、シグナリングコネクションが切断されると考えられるまでの時間を十分に見込んで、任意の時間を設定するようにすればよい。 For example, when the control unit 11 transmits the location registration information (Attach か ら request (Follow-on)) requesting extension of the signaling connection, the signaling connection is disconnected before a predetermined time elapses. Next, a disconnection presence / absence information indicating that the signaling connection has been disconnected is generated, and if the signaling connection has not been disconnected until a predetermined time has elapsed, it indicates that the signaling connection has not been disconnected. The cutting presence / absence information may be generated. Note that this predetermined time is generally set to an arbitrary time with a sufficient expectation of the time until the signaling connection is considered to be disconnected when the signaling connection is not extended. Good.
　ここで、制御部１１は、シグナリングコネクションの切断があったか否かは、基地局２０側からシグナリングコネクションの解放を要求する解放要求情報(RRC connection release)が移動機１０に送信されたか否かによって判定する。具体的には、位置登録受諾情報は、3GPP仕様における「RRC connection release」メッセージとなる。なお、Ｓ１１～Ｓ１３は、図２のＳ３に対応する。 Here, the control unit 11 determines whether or not the signaling connection has been disconnected depending on whether or not release request information (RRC connection release) requesting release of the signaling connection is transmitted from the base station 20 side to the mobile device 10. To do. More specifically, the location registration acceptance information is an “RRC connection release” message in the 3GPP specifications. S11 to S13 correspond to S3 in FIG.
　ここで、図５を参照して、記憶部１２に格納された基地局情報及び切断有無情報の一例を示す。図５に示すように、基地局２０側装置を特定する基地局情報と、その基地局２０側装置を接続先とするシグナリングコネクションの延長要求後における、シグナリングコネクションの切断の有無を示す切断有無情報とが関連付けられて記憶部１２に格納される。 Here, an example of base station information and disconnection presence / absence information stored in the storage unit 12 is shown with reference to FIG. As shown in FIG. 5, base station information for specifying a base station 20 side device, and disconnection presence / absence information indicating whether or not a signaling connection is disconnected after a request for extending a signaling connection with the base station 20 side device as a connection destination And are stored in the storage unit 12.
　図５では、Cell ID「1」のセルと、PLNM ID「XXX」のPLMNを利用した場合に、シグナリングコネクションの接続先となる基地局２０側装置は、過去のシグナリングコネクションの延長の要求に対して、シグナリングコネクションを切断せずに正常に延長していることを示している。また、Cell ID「2」のセルと、PLNM ID「YYY」のPLMNを利用した場合に、シグナリングコネクションの接続先となる基地局２０側装置は、過去のシグナリングコネクションの延長の要求に対して、シグナリングコネクションを切断してしまっていることを示している。 In FIG. 5, when the cell with cell ID “1” and the PLMN with PLNM ID “XXX” are used, the base station 20 side device that is the connection destination of the signaling connection responds to the request for extension of the past signaling connection. Thus, the signaling connection is normally extended without being disconnected. In addition, when the cell ID “2” cell and the PLNM ID “YYY” PLMN are used, the base station 20 side device to which the signaling connection is connected responds to a request for extension of the past signaling connection. It indicates that the signaling connection has been disconnected.
　すなわち、上記の例では、記憶部１２に格納された基地局情報及び切断有無情報によって、Cell ID「1」のセルと、PLNM ID「XXX」のPLMNを利用した場合に、シグナリングコネクションの接続先となる基地局２０側装置は、シグナリングコネクションの延長の要求に対して、シグナリングコネクションを延長する機能が備わっており、Cell ID「2」のセルと、PLNM ID「YYY」のPLMNを利用した場合に、シグナリングコネクションの接続先となる基地局２０側装置は、シグナリングコネクションの延長の要求に対して、シグナリングコネクションを延長する機能が備わっていないことが分かる。 That is, in the above example, when a cell with cell ID “1” and a PLMN with PLNM ID “XXX” are used by the base station information and disconnection presence / absence information stored in the storage unit 12, the connection destination of the signaling connection The base station 20 side device has a function to extend the signaling connection in response to a request for extension of the signaling connection, and uses a cell ID “2” cell and a PLMN ID “YYY” PLMN. In addition, it can be seen that the base station 20 side device that is the connection destination of the signaling connection does not have a function of extending the signaling connection in response to a request for extending the signaling connection.
　これにより、本実施の形態では、移動機１０は、記憶部１２に格納された基地局情報及び切断有無情報を参照することで、シグナリングコネクションを延長したい場合に、移動機１０側でシグナリングコネクションの延長処理を実施してもよいか、基地局２０側からのシグナリングコネクションが切断されてしまうため、そのシグナリングコネクションの切断を待ってから、新たなシグナリングコネクションの接続処理を実施すべきか、を判定することが可能となる。 Thereby, in this Embodiment, when the mobile station 10 wants to extend the signaling connection by referring to the base station information and the disconnection presence / absence information stored in the storage unit 12, the mobile station 10 side sets the signaling connection. Whether the extension process may be performed or the signaling connection from the base station 20 side is disconnected, so it is determined whether the connection process of a new signaling connection should be performed after waiting for the disconnection of the signaling connection It becomes possible.
　続いて、図６を参照して、本発明の実施の形態にかかる移動機１０のシグナリングコネクション延長処理実施判定処理について説明する。図６は、本発明の実施の形態にかかる移動機１０のシグナリングコネクション延長処理実施判定処理を示すフローチャートである。 Subsequently, the signaling connection extension process execution determination process of the mobile device 10 according to the embodiment of the present invention will be described with reference to FIG. FIG. 6 is a flowchart showing the signaling connection extension process execution determination process of the mobile device 10 according to the embodiment of the present invention.
　移動機１０が、基地局２０側から送信された位置登録受諾情報(Attach accept(spare0))を受信した状況から説明する。移動機１０の制御部１１は、受信した位置登録受諾情報(Attach accept(spare0))から基地局情報を取得する(Ｓ２０)。なお、Ｓ２０は、図２のＳ３及び図４のＳ１１に対応する。また、制御部１１は、過去に取得した基地局情報と、その基地局情報と関連付けられた切断有無情報とを記憶部１２から取得する(Ｓ２１)。 A description will be given from the situation where the mobile device 10 has received the location registration acceptance information (Attach accept (spare0)) transmitted from the base station 20 side. The control unit 11 of the mobile device 10 acquires base station information from the received location registration acceptance information (Attach accept (spare0)) (S20). S20 corresponds to S3 in FIG. 2 and S11 in FIG. Further, the control unit 11 acquires the base station information acquired in the past and the disconnection presence / absence information associated with the base station information from the storage unit 12 (S21).
　制御部１１は、ステップＳ２０で取得した基地局情報と、記憶部１２に格納された基地局情報とを比較することで、ステップＳ２０で取得した基地局情報と、シグナリングコネクションの切断があったことを示す切断有無情報と関連付けられた基地局情報とが一致するか否かを判定する(Ｓ２２)。なお、Ｓ２１、Ｓ２２は、図２のＳ４に対応する。例えば、図５に示すように、基地局情報がセルとPLMNを示す場合、セルとPLMNの双方が、ステップＳ２０で取得した基地局情報と、記憶部１２に格納された基地局情報との間で一致する場合に、基地局情報が一致すると判定する。 The control unit 11 compares the base station information acquired in step S20 with the base station information stored in the storage unit 12, thereby disconnecting the base station information acquired in step S20 and the signaling connection. It is determined whether or not the disconnection presence / absence information indicating the base station information associated with the disconnection presence / absence information matches (S22). S21 and S22 correspond to S4 in FIG. For example, as shown in FIG. 5, when the base station information indicates a cell and a PLMN, both the cell and the PLMN are between the base station information acquired in step S20 and the base station information stored in the storage unit 12. If the base station information matches, the base station information is determined to match.
　制御部１１は、ステップＳ２０で取得した基地局情報と、シグナリングコネクションの切断があったことを示す切断有無情報と関連付けられた基地局情報とが一致する場合(Ｓ２２：一致)、シグナリングコネクションの延長処理に係るシグナリングの実施を抑止する(Ｓ２３)。なお、Ｓ２３は、図２のＳ５に対応する。 When the base station information acquired in step S20 matches the base station information associated with the disconnection presence / absence information indicating that the signaling connection is disconnected (S22: match), the control unit 11 extends the signaling connection. Implementation of signaling related to the processing is suppressed (S23). Note that S23 corresponds to S5 in FIG.
　このように、本実施の形態では、記憶部１２に格納された基地局情報及び切断有無情報が示す、過去のシグナリングコネクションの延長実績によって、シグナリングコネクションの接続先の基地局２０側装置が、シグナリングコネクションの延長を行うことができる否かを判定することが可能となる。これによって、シグナリングコネクションの延長を行うことができない基地局２０側装置が、そのシグナリングコネクションの接続先となっている場合に、それを認識してシグナリングコネクションの延長処理に係るシグナリングの実施を抑止することが可能となる。そのため、移動機１０にてシグナリングコネクションの延長処理を実施しているときに、基地局２０側においてシグナリングコネクションが延長されずに、シグナリングコネクションの切断が行われるという、シグナリングコネクションの処理状態の不一致が発生してしまうことを防止し、無駄なシグナリングの発生を減少させることができる。 As described above, in the present embodiment, the base station 20 side device to which the signaling connection is connected determines whether the base station 20 side device to which the signaling connection is connected is based on the past performance of the signaling connection indicated by the base station information and disconnection presence / absence information stored in the storage unit 12. It becomes possible to determine whether or not the connection can be extended. As a result, when the base station 20 side apparatus that cannot perform the extension of the signaling connection is the connection destination of the signaling connection, the base station 20 side apparatus recognizes it and suppresses the signaling related to the extension process of the signaling connection. It becomes possible. Therefore, when the mobile station 10 is executing the extension process of the signaling connection, there is a mismatch in the processing state of the signaling connection that the signaling connection is disconnected without extending the signaling connection on the base station 20 side. Occurrence can be prevented and generation of useless signaling can be reduced.
　なお、基地局情報の一致を確認するマッチングでは、上述したように全項目(上記の例では、セルとPLMN)が完全一致した場合に、基地局情報が一致すると判断するようにしてもよく、確率的手法を用いることで基地局情報の類似度が所定の度合い以上と判断される場合に、基地局情報が一致すると判断するようにしてもよい。 In the matching for confirming the match of the base station information, as described above, if all items (in the above example, the cell and the PLMN) are completely matched, it may be determined that the base station information matches, If the similarity of the base station information is determined to be greater than or equal to a predetermined degree by using a probabilistic method, it may be determined that the base station information matches.
　続いて、図７を参照して、本発明の実施の形態にかかる移動通信システム１の動作(移動機１０と、過去にシグナリングコネクションの延長が成功した基地局２０側装置との動作)について説明する。図７は、本発明の実施の形態にかかる移動通信システム１の動作(移動機１０と、過去にシグナリングコネクションの延長が成功した基地局２０側装置とのど動作)を示すフローチャートである。 Next, with reference to FIG. 7, the operation of the mobile communication system 1 according to the embodiment of the present invention (the operation of the mobile station 10 and the base station 20 side apparatus in which the signaling connection has been successfully extended in the past) will be described. To do. FIG. 7 is a flowchart showing the operation of the mobile communication system 1 according to the embodiment of the present invention (the throat operation between the mobile station 10 and the base station 20 side apparatus in which the signaling connection has been successfully extended in the past).
　移動機１０の制御部１１は、基地局２０側との間に確立されたシグナリングコネクションを延長する場合、位置登録要求情報(Attach request(Follow-on))を、通信部１３を介して基地局２０側に送信する(Ｓ１００)。基地局２０側は、移動機１０から位置登録要求情報(Attach request(Follow-on))の受信に応じて、位置登録受諾情報(Attach accept(spare0))を移動機１０に送信する(Ｓ１０１)。 When extending a signaling connection established with the base station 20 side, the control unit 11 of the mobile device 10 sends location registration request information (Attach request (Follow-on)) via the communication unit 13 to the base station. It transmits to the 20 side (S100). The base station 20 side transmits location registration acceptance information (Attach accept (spare0)) to the mobile device 10 in response to reception of location registration request information (Attach request (Follow-on)) from the mobile device 10 (S101). .
　移動機１０の制御部１１は、基地局２０側から通信部１３を介して受信した位置登録受諾情報(Attach accept(spare0))から取得した基地局情報と、記憶部１２に格納された基地局情報及び切断有無情報とに基づいて、シグナリングコネクションの接続先(延長要求先)の基地局２０側装置が、過去にシグナリングコネクションの延長に失敗した基地局２０側装置であるか否かを判定する(Ｓ１０２)。上述したように、ここでは、基地局２０側装置が、過去にシグナリングコネクションの延長が成功した基地局２０側装置であるため、制御部１１は、基地局２０側装置が、過去にシグナリングコネクションの延長に失敗した基地局２０側装置でないと判断する。 The control unit 11 of the mobile device 10 includes base station information acquired from the location registration acceptance information (Attach accept (spare0)) received from the base station 20 side via the communication unit 13 and the base station stored in the storage unit 12. Based on the information and disconnection presence / absence information, it is determined whether or not the base station 20 side device to which the signaling connection is connected (extension request destination) is a base station 20 side device that has failed to extend the signaling connection in the past. (S102). As described above, here, since the base station 20 side device is the base station 20 side device in which the signaling connection has been successfully extended in the past, the control unit 11 allows the base station 20 side device to It is determined that it is not the base station 20 side device that failed to extend.
　すなわち、基地局２０側からは、移動機１０に対して解放要求情報(RRC connection release)は送信されないことになる。そのため、移動機１０の制御部１１は、シグナリングコネクション延長処理を実施する。具体的には、制御部１１は、3GPPの仕様に従って、シグナリングコネクションの延長時における接続要求情報(active PDP context request)を、通信部１３を介して基地局２０側に送信する(Ｓ１０３)。具体的には、接続要求情報(active PDP context request)は、3GPP仕様における「active PDP context request」メッセージとなる。 That is, release request information (RRC connection release) is not transmitted from the base station 20 side to the mobile device 10. Therefore, the control unit 11 of the mobile device 10 performs a signaling connection extension process. Specifically, the control unit 11 transmits connection request information (active PDP context request) at the time of extension of the signaling connection to the base station 20 side via the communication unit 13 in accordance with 3GPP specifications (S103). Specifically, the connection request information (active PDP context request) is an “active PDP context request” message in the 3GPP specifications.
　このように、過去にシグナリングコネクションの延長が成功した基地局２０側装置である場合、基地局２０側からRRC connection releaseメッセージは送信されず、移動機１０と基地局２０側との間でシグナリングコネクション処理状態が不一致となることはない。そのため、移動機１０は、active PDP context requestメッセージを基地局２０側に送信する。 As described above, in the case of the base station 20 side apparatus in which the signaling connection has been successfully extended in the past, the RRC connection release message is not transmitted from the base station 20 side, and the signaling connection is established between the mobile device 10 and the base station 20 side. Processing status will not be inconsistent. Therefore, the mobile device 10 transmits an active PDP context request message to the base station 20 side.
　続いて、図８を参照して、本発明の実施の形態にかかる移動通信システム１の動作(移動機１０と、過去にシグナリングコネクションの延長が失敗した基地局２０側装置との動作)について説明する。図８は、本発明の実施の形態にかかる移動通信システム１の動作(移動機１０と、過去にシグナリングコネクションの延長が失敗した基地局２０側装置とのど動作)を示すフローチャートである。 Next, with reference to FIG. 8, the operation of the mobile communication system 1 according to the embodiment of the present invention (the operation of the mobile station 10 and the base station 20 side apparatus that has failed to extend the signaling connection in the past) will be described. To do. FIG. 8 is a flowchart showing the operation of the mobile communication system 1 according to the embodiment of the present invention (the throat operation between the mobile station 10 and the base station 20 side apparatus that has failed to extend the signaling connection in the past).
　移動機１０の制御部１１は、基地局２０側との間に確立されたシグナリングコネクションを延長する場合、位置登録要求情報(Attach request(Follow-on))を、通信部１３を介して基地局２０側に送信する(Ｓ２００)。基地局２０側は、移動機１０から位置登録要求情報(Attach request(Follow-on))の受信に応じて、位置登録受諾情報(Attach accept(spare0))を移動機１０に送信する(Ｓ２０１)。 When extending a signaling connection established with the base station 20 side, the control unit 11 of the mobile device 10 sends location registration request information (Attach request (Follow-on)) via the communication unit 13 to the base station. It transmits to the 20 side (S200). In response to receiving location registration request information (Attachttarequest (Follow-on)) from the mobile device 10, the base station 20 transmits location registration acceptance information (Attach accept (spare0)) to the mobile device 10 (S201). .
　移動機１０の制御部１１は、基地局２０側から通信部１３を介して受信した位置登録受諾情報(Attach accept(spare0))から取得した基地局情報と、記憶部１２に格納された基地局情報及び切断有無情報とに基づいて、基地局２０側装置が、シグナリングコネクションの接続先(延長要求先)の基地局２０側装置が、過去にシグナリングコネクションの延長に失敗した基地局２０側装置であるか否かを判定する(Ｓ２０２)。上述したように、ここでは、基地局２０側装置が、過去にシグナリングコネクションの延長が失敗した基地局２０側装置であるため、制御部１１は、基地局２０側装置が、過去にシグナリングコネクションの延長に失敗した基地局２０側装置であると判断する。 The control unit 11 of the mobile device 10 includes base station information acquired from the location registration acceptance information (Attach accept (spare0)) received from the base station 20 side via the communication unit 13 and the base station stored in the storage unit 12. Based on the information and the disconnection presence / absence information, the base station 20 side device is a base station 20 side device that has failed to extend the signaling connection in the past. It is determined whether or not there is (S202). As described above, here, since the base station 20 side device is the base station 20 side device in which the extension of the signaling connection has failed in the past, the control unit 11 allows the base station 20 side device to It is determined that the base station 20 side apparatus has failed to be extended.
　すなわち、基地局２０側においてシグナリングコネクションの延長は行われず、基地局２０側から、移動機１０に対して解放要求情報(RRC connection release)が送信されることになる。そのため、制御部１１は、シグナリングコネクション延長処理にかかるシグナリングの実施を抑止する(Ｓ２０３)。具体的には、制御部１１は、シグナリングコネクションの延長時における接続要求情報(active PDP context request)の基地局２０側への送信を抑止する。 That is, the signaling connection is not extended on the base station 20 side, and release request information (RRC connection release) is transmitted from the base station 20 side to the mobile device 10. Therefore, the control unit 11 suppresses the implementation of signaling related to the signaling connection extension process (S203). Specifically, the control unit 11 suppresses transmission of connection request information (active PDP context request) to the base station 20 when the signaling connection is extended.
　基地局２０側は、シグナリングコネクションの期間満了に応じて、解放要求情報(RRC connection release)を移動機１０に送信する(Ｓ２０４)。移動機１０の制御部１１は、基地局２０側からの解放要求情報(RRC connection release)の受信後に、新規にシグナリングコネクションの接続処理を実施する。具体的には、移動機１０は、3GPPの仕様に従って、シグナリングコネクションの新規接続時における接続要求情報(active PDP context request)を、通信部１３を介して基地局２０側に送信する(Ｓ２０５)。 The base station 20 side transmits release request information (RRC connection release) to the mobile device 10 in response to the expiration of the signaling connection period (S204). After receiving the release request information (RRC 新 規 connection release) from the base station 20 side, the control unit 11 of the mobile device 10 newly performs a signaling connection connection process. Specifically, the mobile device 10 transmits connection request information (active PDP context request) at the time of new connection of the signaling connection to the base station 20 side via the communication unit 13 in accordance with the 3GPP specification (S205).
　このように、過去にシグナリングコネクションの延長が失敗した基地局２０側装置である場合、基地局２０側からRRC connection releaseメッセージが送信されるため、移動機１０側においてシグナリングコネクションの延長処理を実施すると、移動機１０と基地局２０側との間でシグナリングコネクション処理状態が不一致となってしまう。そのため、移動機１０は、active PDP context requestメッセージの基地局２０側への送信を抑止する。 In this way, in the case of the base station 20 side device that has failed to extend the signaling connection in the past, the RRC connection release message is transmitted from the base station 20 side. The signaling connection processing state becomes inconsistent between the mobile device 10 and the base station 20 side. Therefore, the mobile device 10 suppresses transmission of the active PDP context request message to the base station 20 side.
　続いて、図９を参照して、本発明の実施の形態を適用しない場合における動作(移動機１０と、過去にシグナリングコネクションの延長が失敗する基地局２０側装置との動作)について説明する。図９は、本発明の実施の形態を適用しない場合における動作(移動機１０と、過去にシグナリングコネクションの延長が失敗する基地局２０側装置との動作)を示すフローチャートである。 Next, with reference to FIG. 9, an operation when the embodiment of the present invention is not applied (operation between the mobile station 10 and the base station 20 side apparatus in which extension of the signaling connection has failed in the past) will be described. FIG. 9 is a flowchart showing an operation (an operation between the mobile station 10 and the base station 20 side apparatus in which the extension of the signaling connection has failed in the past) when the embodiment of the present invention is not applied.
　移動機１０は、基地局２０側との間に確立されたシグナリングコネクションを延長する場合、位置登録要求情報(Attach request(Follow-on))を基地局２０側に送信する(Ｓ３００)。基地局２０側は、移動機１０から位置登録要求情報(Attach request(Follow-on))の受信に応じて、位置登録受諾情報(Attach accept(spare0))を移動機１０に送信する(Ｓ３０１)。 When extending the signaling connection established with the base station 20 side, the mobile device 10 transmits location registration request information (Attach request (Follow-on)) to the base station 20 side (S300). The base station 20 side transmits location registration acceptance information (Attach accept (spare0)) to the mobile device 10 in response to receiving location registration request information (Attach request (Follow-on)) from the mobile device 10 (S301). .
　しかしながら、上述したように、この例では、移動機１０からは、基地局２０側装置がシグナリングコネクションの延長に対応しているか否かが不明である。そのため、移動機１０は、シグナリングコネクション延長処理を実施する。具体的には、移動機１０は、3GPPの仕様に従って、シグナリングコネクションの延長時における接続要求情報(active PDP context request)を基地局２０側に送信する(Ｓ３０２)。 However, as described above, in this example, it is unclear from the mobile device 10 whether the base station 20 side device supports extension of the signaling connection. Therefore, the mobile device 10 performs a signaling connection extension process. Specifically, the mobile device 10 transmits connection request information (active PDP context request) at the time of extension of the signaling connection to the base station 20 side according to the 3GPP specification (S302).
　ここで、上述したように、この例では、シグナリングコネクションの接続先(延長要求先)の基地局２０側装置が、シグナリングコネクションの延長に対応していないため、基地局２０側装置は、解放要求情報(RRC connection release)を移動機１０に送信する(Ｓ３０３)。すなわち、基地局２０側と(シグナリングコネクションの切断を期待)と、移動機１０側(シグナリングコネクションの延長接続を期待)との間で期待する動作が異なってしまう。これにより、移動機１０は、基地局２０側からの解放要求情報(RRC connection release)に応じて、送信中の接続要求情報(active PDP context request)を破棄して、シグナリングコネクションを切断してしまう。そのため、移動機１０は、改めて、新規にシグナリングコネクションの接続処理を実施する必要が生じてしまう。 Here, as described above, in this example, the base station 20 side device that is the connection destination (extension request destination) of the signaling connection does not support the extension of the signaling connection. Information (RRC connection release) is transmitted to the mobile device 10 (S303). That is, the expected operation differs between the base station 20 side (expecting disconnection of signaling connection) and the mobile station 10 side (expecting extension connection of signaling connection). As a result, the mobile device 10 discards the connection request information (active PDP context request) being transmitted and disconnects the signaling connection according to the release request information (RRC connection release) from the base station 20 side. . Therefore, it becomes necessary for the mobile device 10 to newly execute a signaling connection connection process.
　以上に説明したように、本実施の形態によれば、過去のシグナリングコネクションの延長実績を用いて、シグナリングコネクションの延長の可否を判定することができるため、移動機１０から、直ぐに切断されてしまう無駄なシグナリングを行わないようにすることができる。特に、新旧の基地局２０側装置(例えば、3GPP Release 8に対応する基地局２０側装置と、3GPP Release 5に対応する基地局２０側装置)が混在している国や地域において、移動機１０(携帯電話)から基地局２０への不要なアクセスを減らすことができ、無駄な無線リソースの削減が期待できる。 As described above, according to the present embodiment, since it is possible to determine whether or not a signaling connection can be extended using past signaling connection extension results, the mobile device 10 is immediately disconnected. It is possible to avoid unnecessary signaling. In particular, in a country or region where old and new base station 20 side devices (for example, a base station 20 side device corresponding to 3GPP Release 8 and a base station 20 side device corresponding to 3GPP Release 5) are mixed, the mobile station 10 Unnecessary access from the (mobile phone) to the base station 20 can be reduced, and reduction of useless radio resources can be expected.
　ここで、図１０を参照して、本発明の実施の形態にかかる移動機１０の概要構成について説明する。図１０は、本発明の実施の形態にかかる移動機１０の概要構成となる移動通信端末を示すブロック図である。 Here, with reference to FIG. 10, a schematic configuration of the mobile device 10 according to the embodiment of the present invention will be described. FIG. 10 is a block diagram showing a mobile communication terminal as a schematic configuration of the mobile device 10 according to the embodiment of the present invention.
　移動通信端末９は、記憶部９０、接続延長処理部９１、及び情報制御部９２を有する。移動通信端末９は、移動通信ネットワークにおいてシグナリングコネクションを確立して他端末と通信する移動通信端末である。他端末は、移動機１０の他の移動機及び情報処理装置に対応する。 The mobile communication terminal 9 includes a storage unit 90, a connection extension processing unit 91, and an information control unit 92. The mobile communication terminal 9 is a mobile communication terminal that establishes a signaling connection in a mobile communication network and communicates with other terminals. Other terminals correspond to other mobile devices and information processing devices of the mobile device 10.
　記憶部９０は、移動通信ネットワーク側装置を特定する装置特定情報が格納される。記憶部９０は、記憶部１２に対応する。装置特定情報は、基地局情報に対応する。 The storage unit 90 stores device specifying information for specifying a mobile communication network side device. The storage unit 90 corresponds to the storage unit 12. The device specifying information corresponds to the base station information.
　接続延長処理部９１は、シグナリングコネクションを延長するときに、そのシグナリングコネクションの延長を要求する延長要求情報を、そのシグナリングコネクションの接続先の移動通信ネットワーク側装置に送信するとともに、自端末における、そのシグナリングコネクションの延長処理を実行する。 When extending the signaling connection, the connection extension processing unit 91 transmits extension request information for requesting extension of the signaling connection to the mobile communication network side device to which the signaling connection is connected, The extension process of the signaling connection is executed.
　情報制御部９２は、移動通信ネットワーク側装置において延長要求情報で延長を要求したシグナリングコネクションが延長されなかったと判定した場合、そのシグナリングコネクションの接続先の移動通信ネットワーク側装置を特定する装置特定情報を記憶部９０に格納する。 When the information control unit 92 determines that the signaling connection requested to be extended by the extension request information is not extended in the mobile communication network side device, the information control unit 92 sets device specifying information for specifying the mobile communication network side device to which the signaling connection is connected. Store in the storage unit 90.
　接続延長処理部９１は、シグナリングコネクションを延長するときに、そのシグナリングコネクションの接続先の移動通信ネットワーク側装置と、記憶部９０に格納された装置特定情報によって特定される移動通信ネットワーク側装置と、が一致すると判定した場合、自端末における、そのシグナリングコネクションの延長処理の実行を抑止する。移動通信ネットワーク側装置は、基地局２０側装置に対応する。延長要求情報は、Attach requestメッセージに対応する。接続延長処理部９１及び情報制御部９２は、制御部１１に対応する。 The connection extension processing unit 91, when extending a signaling connection, the mobile communication network side device to which the signaling connection is connected, the mobile communication network side device specified by the device specifying information stored in the storage unit 90, Are determined to match, the execution of the extension process of the signaling connection in the own terminal is suppressed. The mobile communication network side device corresponds to the base station 20 side device. The extension request information corresponds to the Attach request message. The connection extension processing unit 91 and the information control unit 92 correspond to the control unit 11.
　なお、本発明は上記実施の形態に限られたものではなく、趣旨を逸脱しない範囲で適宜変更することが可能である。例えば、以下のように変形することも可能である。 Note that the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit of the present invention. For example, the following modifications are possible.
　上記実施の形態では、基地局情報と切断有無情報とを関連付けて記憶部１２に格納し、シグナリングコネクションの延長要求に対する応答で取得した基地局情報と、シグナリングコネクションの切断があったことを示す切断有無情報と関連付けられた基地局情報とを比較することで、シグナリングコネクションの延長に対応していない基地局２０側装置を検出するようにしていたが、これに限られない。例えば、過去にシグナリングコネクションの延長に失敗した基地局２０側装置を特定する基地局情報のみを記憶部１２に格納するようにし、シグナリングコネクションの延長要求に対する応答で取得した基地局情報と、記憶部１２に格納された基地局情報とが一致すると判定した場合に、移動機１０におけるシグナリングコネクションの延長処理を抑止するようにしてもよい。 In the above embodiment, the base station information and the disconnection presence / absence information are associated with each other and stored in the storage unit 12, and the base station information acquired in response to the request for extending the signaling connection and the disconnection indicating that the signaling connection has been disconnected Although the base station information associated with the presence / absence information is compared to detect the base station 20 side device that does not support extension of the signaling connection, the present invention is not limited to this. For example, only base station information specifying the base station 20 side device that has failed to extend the signaling connection in the past is stored in the storage unit 12, and the base station information acquired in response to the request for extension of the signaling connection and the storage unit When it is determined that the base station information stored in 12 matches, the signaling connection extension process in the mobile device 10 may be suppressed.
　また、上述した移動機１０において実行するプログラムは、様々なタイプの非一時的なコンピュータ可読媒体（non-transitory computer readable medium）を用いて格納され、移動機１０(コンピュータ)に供給することができる。非一時的なコンピュータ可読媒体は、様々なタイプの実体のある記録媒体（tangible storage medium）を含む。非一時的なコンピュータ可読媒体の例は、磁気記録媒体（例えばフレキシブルディスク、磁気テープ、ハードディスクドライブ）、光磁気記録媒体（例えば光磁気ディスク）、ＣＤ－ＲＯＭ（Read Only Memory）、ＣＤ－Ｒ、ＣＤ－Ｒ／Ｗ、半導体メモリ（例えば、マスクＲＯＭ、ＰＲＯＭ（Programmable ROM）、ＥＰＲＯＭ（Erasable PROM）、フラッシュＲＯＭ、ＲＡＭ（Random Access Memory））を含む。また、プログラムは、様々なタイプの一時的なコンピュータ可読媒体（transitory computer readable medium）によってコンピュータに供給されてもよい。一時的なコンピュータ可読媒体の例は、電気信号、光信号、及び電磁波を含む。一時的なコンピュータ可読媒体は、電線及び光ファイバ等の有線通信路、又は無線通信路を介して、プログラムをコンピュータに供給できる。 Further, the program executed in the mobile device 10 described above can be stored using various types of non-transitory computer-readable media, and supplied to the mobile device 10 (computer). . Non-transitory computer readable media include various types of tangible storage media (tangible storage medium). Examples of non-transitory computer-readable media include magnetic recording media (eg flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (eg magneto-optical discs), CD-ROMs (Read Only Memory), CD-Rs, CD-R / W, semiconductor memory (for example, mask ROM, PROM (Programmable ROM), EPROM (Erasable ROM), flash ROM, RAM (Random Access Memory)) are included. The program may also be supplied to the computer by various types of temporary computer-readable media. Examples of transitory computer readable media include electrical signals, optical signals, and electromagnetic waves. The temporary computer-readable medium can supply the program to the computer via a wired communication path such as an electric wire and an optical fiber, or a wireless communication path.
　以上、実施の形態を参照して本願発明を説明したが、本願発明は上記によって限定されるものではない。本願発明の構成や詳細には、発明のスコープ内で当業者が理解し得る様々な変更をすることができる。 The present invention has been described above with reference to the embodiment, but the present invention is not limited to the above. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the invention.
　この出願は、２０１２年９月１２日に出願された日本出願特願２０１２－２００３３４を基礎とする優先権を主張し、その開示の全てをここに取り込む。 This application claims priority based on Japanese Patent Application No. 2012-200334 filed on September 12, 2012, the entire disclosure of which is incorporated herein.
１　移動通信システム
９　移動通信端末
１０　移動機
１１　制御部
１２、９０　記憶部
１３　通信部
２０　基地局
９１　接続延長処理部
９２　情報制御部  DESCRIPTION OF SYMBOLS 1 Mobile communication system 9 Mobile communication terminal 10 Mobile device 11 Control part 12, 90 Storage part 13 Communication part 20 Base station 91 Connection extension process part 92 Information control part

Claims (9)

  1. 　移動通信ネットワークにおいてシグナリングコネクションを確立して他端末と通信する移動通信端末であって、
    　前記移動通信ネットワーク側装置を特定する装置特定情報が格納される記憶手段と、
    　前記シグナリングコネクションを延長するときに、当該シグナリングコネクションの延長を要求する延長要求情報を、当該シグナリングコネクションの接続先の前記移動通信ネットワーク側装置に送信するとともに、自端末における当該シグナリングコネクションの延長処理を実行する接続延長処理手段と、
    　前記移動通信ネットワーク側装置において前記延長要求情報で延長を要求したシグナリングコネクションが延長されなかったと判定した場合、当該シグナリングコネクションの接続先の前記移動通信ネットワーク側装置を特定する装置特定情報を前記記憶手段に格納する情報制御手段と、を備え、
    　前記接続延長処理手段は、前記シグナリングコネクションを延長するときに、当該シグナリングコネクションの接続先の前記移動通信ネットワーク側装置と、前記記憶手段に格納された装置特定情報によって特定される前記移動通信ネットワーク側装置と、が一致すると判定した場合、前記自端末における当該シグナリングコネクションの延長処理の実行を抑止する、
    　移動通信端末。     A mobile communication terminal that establishes a signaling connection in a mobile communication network and communicates with other terminals,
    Storage means for storing device specifying information for specifying the mobile communication network side device;
    When extending the signaling connection, extension request information for requesting extension of the signaling connection is transmitted to the mobile communication network side device to which the signaling connection is connected, and the extension process of the signaling connection in the own terminal is performed. Connection extension processing means to be executed;
    When it is determined in the mobile communication network side device that the signaling connection requested to be extended by the extension request information has not been extended, device specifying information for specifying the mobile communication network side device to which the signaling connection is connected is stored in the storage unit And an information control means for storing in
    The connection extension processing means, when extending the signaling connection, the mobile communication network side apparatus to which the signaling connection is connected and the mobile communication network side specified by the apparatus specifying information stored in the storage means When it is determined that the device matches, the execution of the extension process of the signaling connection in the own terminal is suppressed,
    Mobile communication terminal.
  2. 　前記移動通信端末は、さらに、前記延長要求情報の応答として、当該延長要求情報で延長を要求するシグナリングコネクションの接続先の前記移動通信ネットワーク側装置を特定する装置特定情報を含む延長要求応答情報を受信する応答受信手段を備え、
    　前記情報制御手段は、前記延長要求情報で延長を要求したシグナリングコネクションが延長されなかったと判定した場合、当該シグナリングコネクションの接続先の前記移動通信ネットワーク側装置を特定する装置特定情報として、当該延長要求情報の応答として受信した延長要求応答情報に含まれる装置特定情報を前記記憶手段に格納する、
    　請求項１に記載の移動通信端末。     The mobile communication terminal further includes, as a response to the extension request information, extension request response information including device specifying information for specifying the mobile communication network side device to which a signaling connection requesting extension is requested by the extension request information. A response receiving means for receiving,
    When the information control means determines that the signaling connection requested for extension in the extension request information has not been extended, the extension request is used as device specifying information for specifying the mobile communication network side device to which the signaling connection is connected. Storing device specifying information included in the extension request response information received as an information response in the storage means;
    The mobile communication terminal according to claim 1.
  3. 　前記移動通信端末は、3GPP(3rd Generation Partnership Project)の仕様に従って、前記シグナリングコネクションを確立して他端末と通信するものであって、
    　前記延長要求情報及び前記延長要求応答情報のそれぞれは、前記3GPPの仕様で規定されるメッセージであり、
    　前記情報制御手段及び前記接続延長処理手段のそれぞれは、前記延長要求応答情報としてのメッセージに含まれる、前記移動通信ネットワーク側装置の特定に利用可能なIE(Information Element)情報を、前記装置特定情報として利用する、
    　請求項２に記載の移動通信端末。     The mobile communication terminal communicates with other terminals by establishing the signaling connection according to the specifications of 3GPP (3rd Generation Partnership Project),
    Each of the extension request information and the extension request response information is a message defined in the 3GPP specification,
    Each of the information control unit and the connection extension processing unit includes IE (Information Element) information that can be used for specifying the mobile communication network side device included in the message as the extension request response information, and the device specifying information. To use as,
    The mobile communication terminal according to claim 2.
  4. 　前記延長要求情報は、Attach requestメッセージであり、
    　前記延長要求応答情報は、Attach acceptメッセージである、
    　請求項３に記載の移動通信端末。     The extension request information is an Attach request message,
    The extension request response information is an Attach accept message.
    The mobile communication terminal according to claim 3.
  5. 　前記情報制御手段は、前記延長要求情報を送信したにも関わらず、前記延長要求情報の送信から所定の時間内に、前記移動通信ネットワーク側装置からRRC connection releaseメッセージを受信した場合、当該延長要求情報で延長を要求したシグナリングコネクションが延長されなかったと判定する、
    　請求項３又は４に記載の移動通信端末。     When the information control means receives the RRC connection release message from the mobile communication network side device within a predetermined time from the transmission of the extension request information, despite the transmission of the extension request information, the extension request information It is determined that the signaling connection that requested extension by information was not extended.
    The mobile communication terminal according to claim 3 or 4.
  6. 　前記シグナリングコネクションの延長処理は、前記延長を要求するシグナリングコネクションについてのactive PDP context requestメッセージを前記移動通信ネットワーク側に送信する処理を含む、
    　請求項３乃至５のいずれか１項に記載の移動通信端末。     The extension process of the signaling connection includes a process of transmitting an active PDP context request message for the signaling connection requesting the extension to the mobile communication network side.
    The mobile communication terminal according to any one of claims 3 to 5.
  7. 　前記情報制御手段及び前記接続延長処理手段のそれぞれは、前記シグナリングコネクションで利用されているPLMN(Public Land Mobile Network)を示すIE情報、前記シグナリングコネクションで利用されているセルを示すIE情報、及び、前記シグナリングコネクションで利用されている周波数を示すIE情報のうち、少なくとも１つのIE情報を、前記装置特定情報として利用する、
    　請求項３に記載の移動通信端末。     Each of the information control means and the connection extension processing means is IE information indicating a PLMN (Public Land Mobile Network) used in the signaling connection, IE information indicating a cell used in the signaling connection, and Of the IE information indicating the frequency used in the signaling connection, at least one IE information is used as the device specifying information.
    The mobile communication terminal according to claim 3.
  8. 　移動通信ネットワークにおいてシグナリングコネクションを確立して他端末と通信する通信制御方法であって、
    　前記シグナリングコネクションを延長するときに、当該シグナリングコネクションの延長を要求する延長要求情報を、当該シグナリングコネクションの接続先の前記移動通信ネットワーク側装置に送信するとともに、当該シグナリングコネクションの延長処理を実行し、
    　前記移動通信ネットワーク側において前記延長要求情報で延長を要求したシグナリングコネクションが延長されなかったと判定した場合、当該シグナリングコネクションの接続先の前記移動通信ネットワーク側装置を特定する装置特定情報を記憶手段に格納するものであり、
    　前記シグナリングコネクションの延長処理の実行では、前記シグナリングコネクションを延長するときに、当該シグナリングコネクションの接続先の前記移動通信ネットワーク側装置と、前記記憶手段に格納された装置特定情報によって特定される前記移動通信ネットワーク側装置と、が一致すると判定した場合、当該シグナリングコネクションの延長処理の実行を抑止する、
    　通信制御方法。     A communication control method for establishing a signaling connection in a mobile communication network and communicating with other terminals,
    When extending the signaling connection, the extension request information for requesting extension of the signaling connection is transmitted to the mobile communication network side apparatus to which the signaling connection is connected, and the extension process of the signaling connection is executed.
    When it is determined that the signaling connection requested to be extended by the extension request information is not extended on the mobile communication network side, device specifying information for specifying the mobile communication network side device to which the signaling connection is connected is stored in the storage means Is what
    In the execution of the extension process of the signaling connection, when extending the signaling connection, the mobile communication network side apparatus to which the signaling connection is connected and the movement specified by the apparatus specifying information stored in the storage means When it is determined that the communication network side device matches, the execution of the signaling connection extension process is suppressed.
    Communication control method.
  9. 　移動通信ネットワークにおいてシグナリングコネクションを確立して他端末と通信する通信制御プログラムであって、
    　前記シグナリングコネクションを延長するときに、当該シグナリングコネクションの延長を要求する延長要求情報を、当該シグナリングコネクションの接続先の前記移動通信ネットワーク側装置に送信するとともに、当該シグナリングコネクションの延長処理を実行する接続延長処理と、
    　前記移動通信ネットワーク側において前記延長要求情報で延長を要求したシグナリングコネクションが延長されなかったと判定した場合、当該シグナリングコネクションの接続先の前記移動通信ネットワーク側装置を特定する装置特定情報を記憶手段に格納する情報制御処理と、を移動通信端末に実行させ、
    　前記接続延長処理では、前記シグナリングコネクションを延長するときに、当該シグナリングコネクションの接続先の前記移動通信ネットワーク側装置と、前記記憶手段に格納された装置特定情報によって特定される前記移動通信ネットワーク側装置と、が一致すると判定した場合、当該シグナリングコネクションの延長処理の実行を抑止する、
    　通信制御プログラムが格納された非一時的なコンピュータ可読媒体。     A communication control program for establishing a signaling connection in a mobile communication network and communicating with other terminals,
    A connection for transmitting extension request information for requesting extension of the signaling connection to the mobile communication network side device to which the signaling connection is connected and extending the signaling connection when extending the signaling connection Extension process,
    When it is determined that the signaling connection requested to be extended by the extension request information is not extended on the mobile communication network side, device specifying information for specifying the mobile communication network side device to which the signaling connection is connected is stored in the storage means Information control processing to be executed by the mobile communication terminal,
    In the connection extension process, when extending the signaling connection, the mobile communication network side device to which the signaling connection is connected and the mobile communication network side device specified by the device specifying information stored in the storage means And the execution of the extension processing of the signaling connection is suppressed,
    A non-transitory computer readable medium storing a communication control program.
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