Abstract: A mobile communication method in a mobile communication system according to the present invention in which when MME #1 is restarted in a first state in which a PDN connection #1 including one or more EPS bearers #1 is set among a UE, an S-GW #1, and a P-GW #1, the first state transitions to a second state in which the PDN connection #1 is released between the UE and the S-GW #1 and the connection is maintained only between the S-GW #1 and the P-GW #1, the mobile communication method including the step of not transmitting, by the MME #1, “Paging” whose destination is the UE upon receiving “DDN” including IMSI of the UE after detecting that re-attach processing for the mobile station has been executed in the second state.

Abstract: A mobile communication method in a mobile communication system according to the present invention in which when MME#1 is restarted in a first state in which a PDN connection #1 including one or more EPS bearers #1 is set among a UE, an S-GW#1, and a P-GW#1, the first state transitions to a second state in which the PDN connection #1 is released between the UE and the S-GW#1 and the connection is maintained only between the S-GW#1 and the P-GW#1, the mobile communication method including the step of not transmitting, by the MME#1, “Paging” whose destination is the UE upon receiving “DDN” including IMSI of the UE after detecting that re-attach processing for the mobile station has been executed in the second state.

Abstract: A mobile communication method in a mobile communication system according to the present invention in which when MME#1 is restarted in a first state in which a PDN connection #1 including one or more EPS bearers #1 is set among a UE, an S-GW#1, and a P-GW#1, the first state transitions to a second state in which the PDN connection #1 is released between the UE and the S-GW#1 and the connection is maintained only between the S-GW#1 and the P-GW#1, the mobile communication method including the step of not transmitting, by the MME#1, “Paging” whose destination is the UE upon receiving “DDN” including IMSI of the UE after detecting that re-attach processing for the mobile station has been executed in the second state.

Abstract: Provided are a billing system, a billing apparatus, and a billing method capable of billing for device-to-device direct communication (D2D communication) performed using a radio access network such as LIE. A terminal 400A sends a billing apparatus 200 billing-related information to be used to bill for direct communication. The billing apparatus 200 acquires the billing-related information from the radio communication terminal and generates billing information on the direct communication based on the billing-related information acquired.

Abstract: A mobile communication method according to the present invention includes the steps of: sending “INVITE” from a UE#1 to a P-CSCF/VATF in a visited network of the UE#1; sending “INVITE” from the P-CSCF/VATF to an IMS; and allocating, by the P-CSCF/VATF, an MGW#1 to the path for voice communications.

Abstract: A mobile communication method according to the present invention includes the steps of: sending “INVITE” from a UE#1 to a P-CSCF/VATF in a visited network of the UE#1; sending “INVITE” from the P-CSCF/VATF to an IMS; and allocating, by the P-CSCF/VATF, an MGW#1 to the path for voice communications.

Abstract: In a mobile communication system capable of switching between a first communication state and a second communication state, in a case of a first communication state, a VoIP media signal is exchanged between a mobile station UE #1 and a mobile station UE #2 via an LTE radio access system and a node S-GW, a VoIP control signal is exchanged via the LTE radio access system, the node S-GW, and IMS, and in a case of a second communication state, a circuit-switched signal is exchanged between the mobile station UE #1 and an enhanced MSC/MGW via a 2G/3G radio access system, the VoIP media signal is exchanged between the enhanced MSC/MGW and the mobile station UE #2 via the node S-GW, and the VoIP control signal is exchanged between the enhanced MSC/MGW and the mobile station UE #2 via the node S-GW and the IMS.

Abstract: A paging method of the present invention is a paging method for paging a UE (10) in an idle state when a P-GW (20) receives a packet for the UE (10) and includes the steps of: in a S-GW (30), setting reception type information of the packet received by the P-GW (20) in “Downlink Data Notification” and sending the “Downlink Data Notification” to an MME (40) and an SGSN (60), and in the MME (40) and SGSN (60), determining whether or not to page the UE (10) based on the reception type information included in the “Downlink Data Notification” from the S-GW (30).

Abstract: A mobile communication system and method that includes a radio access system employing a first communication scheme supporting packet-switched communication and a radio access system employing a second communication scheme supporting both circuit-switched communication and the packet-switched communication. The mobile communication system is configured to switch between a first communication state and a second communication state realizing single radio voice call continuity (SRVCC). The first communication state is when a first mobile station visits the radio access system employing the first communication scheme, and performs voice communication with a second mobile station and packet communication by using packet-switched system.

Abstract: In a mobile communication system including a mobile station, an access apparatus for performing connection control between the mobile station and an access network, and an access network switching apparatus for switching access networks to communicate with the mobile station, the mobile station establishes a first path to communicate with the access apparatus, when the mobile station enters a coverage area of the access apparatus. The access apparatus establishes a second path to communicate with the access network switching apparatus when the first path is established. The access network switching apparatus switches the access networks when a predetermined condition is satisfied.

Abstract: Provided are a radio communication terminal, a communication control apparatus, and a communication control method capable of enhancing the possibility of providing a communication application through inter-terminal direct communication (D2D communication) even in a case where a call request cannot be accepted due to congestion on the network side. In a terminal 400A, a call restriction reception unit 420 receives a call restriction containing configuration information on a communication environment necessary for direct communication. During restriction of initiation of communication to the radio access network, a radio communication unit 440 executes direct communication with another radio communication terminal based on the configuration information if a direct communication determination unit 430 determines that a communication application is executable through direct communication.

Abstract: A mobile communication method according to the present invention includes the steps of: sending “INVITE” from a UE#1 to a P-CSCF/VATF in a visited network of the UE#1; sending “INVITE” from the P-CSCF/VATF to an IMS; and allocating, by the P-CSCF/VATF, an MGW#1 to the path for voice communications.

Abstract: Provided are a communication system capable of causing a communication application to speedily find out whether D2D communication is possible or not. The phonebook server 300 includes a phonebook data acquisition unit 310 configured to acquire first phonebook data containing an identifier of a terminal 400B, a terminal location acquisition unit 320 configured to acquire a location of the terminal 400B contained in the first phonebook data acquired by the phonebook data acquisition unit 310, a phonebook data generation unit 330 configured to generate second phonebook data containing an identifier of a candidate terminal capable of direct communication, based on the location of the terminal 400B acquired by the terminal location acquisition unit 320, and a transmission unit 340 configured to send a terminal 400A the second phonebook data generated by the phonebook data generation unit 330.

Abstract: A mobile communication method in a mobile communication system according to the present invention in which when MME#1 is restarted in a first state in which a PDN connection #1 including one or more EPS bearers #1 is set among a UE, an S-GW#1, and a P-GW#1, the first state transitions to a second state in which the PDN connection #1 is released between the UE and the S-GW#1 and the connection is maintained only between the S-GW#1 and the P-GW#1, the mobile communication method including the step of not transmitting, by the MME#1, “Paging” whose destination is the UE upon receiving “DDN” including IMSI of the UE after detecting that re-attach processing for the mobile station has been executed in the second state.

Abstract: A mobile communication method according to the present invention includes the steps of: starting, by a UE, re-attach processing for MME#2, upon receiving “Paging”; transmitting, by MME#1, “DDN Ack” including “EPS Bearer ID#1” included in “DDN” and “Cause=Re-Attach Success” (information indicating that re-attach processing is successful), to S-GW#1 specified by S-GW address #1 included in the “DDN”; and releasing, by S-GW#1, a PDN connection #1 between S-GW#1 and P-GW#1, upon receiving the “DDN Ack”, the PDN connection #1 corresponding to the “EPS Bearer ID#1” included in the “DDN Ack”.

Abstract: Provided are a radio communication terminal capable of causing a communication application to speedily find out whether D2D communication is possible by using a radio access network such as LTE. A terminal 400A includes a terminal finding unit 405 configured to find a candidate terminal capable of executing direct communication with the terminal 400A, a phonebook processing unit 420 configured to obtain direct-communication phonebook data containing an identifier of the candidate terminal found by the terminal finding unit 405, based on regular phonebook data containing an identifier of another radio communication terminal and being associated with the terminal 400A, and a direct communication execution unit 430 configured to execute direct communication with a counterpart terminal (e.g., a terminal 400B) indicated in a communication request from a communication application 410A, 410C, when the counterpart terminal is contained in the direct-communication phonebook data as the candidate terminal.

Abstract: A mobile communication method according to the present invention includes the steps of: transmitting an “Extended Service Request” from a mobile station UE in Idle mode to a mobility management node MME via a radio base station eNodeB; transmitting an “Initial UE Context Setup Request” from the mobile station UE to the radio base station eNodeB, the “Initial UE Context Setup Request containing priority call information; and preferentially allocating resources to the E-RAB for the mobile station UE by the radio base station eNodeB based on the priority call information contained in the received “Initial UE Context Setup Request.

Abstract: Provided are a radio communication system, a communication control apparatus, and a communication control method allowing radio communication terminals to call each other in a case where device-to-device direct communication (D2D communication) is provided using a radio access network such as LTE. A terminal 400A sends a communication control apparatus a paging signal containing a direct communication request requesting for direct communication with a terminal 400B. The communication control apparatus 200 sends the terminal 400B a paging signal containing information indicating that the terminal 400A is requesting direct communication and configuration information on a communication environment necessary for direct communication.

Abstract: A mobile communication method according to the present invention includes a step of establishing, by a session control node S/P-CSCF, a prioritized-call bearer between a gateway device P-GW and a mobile station UE when an Invite signal including prioritized-call information is received; a step of transmitting, by the session control node S/P-CSCF, the Invite signal including the prioritized-call information to the gateway device P-GW after the prioritized-call bearer is established; and a step of transmitting, by the gateway device P-GW, the Invite signal including the prioritized-call information to the mobile station UE.

Abstract: A mobile communication method according to the present invention includes the steps of: starting, by a UE, re-attach processing for MME#2, upon receiving “Paging”; transmitting, by MME#1, “DDN Ack” including the IMSI of the UE, which is included in the “DDN”, and “Cause=Re-Attach Success”, to S-GW#1 specified by S-GW address #1 included in the “DDN”; and releasing, by S-GW#1, a PDN connection #1 between S-GW#1 and P-GW#1, upon receiving the “DDN Ack”, the PDN connection #1 corresponding to the IMSI of the UE included in the “DDN Ack”.