Abstract: A mobile communication terminal includes a location registration request unit 120 that makes a location registration request for a location registration in each of the mobile communication networks 200 and 300 to a 3.9G network 300, a location registration response receiving unit 130 that receives a location registration response representing a result of the location registration in the both mobile communication networks 200 and 300 in response to the request for the location registration, a location registration determination unit 140 that determines whether or not the location registration only in the 3.

Abstract: A mobile communication method according to the present invention includes the steps of: transmitting, to a mobile switching center MME/SGSN, a NAS connection establishment request for the specific communication, while an AS connection is established between the mobile station UE and a radio access network apparatus eNB/RNC; determining, at the mobile switching center MME/SGSN, to restrict establishment of the NAS connection for the specific communication, when the NAS connection establishment request signal is received and when a predetermined condition is satisfied; and restricting, at the mobile station UE, transmission of a first connection establishment request signal and transmission of the NAS connection establishment request signal, after reception of a rejection signal including a restriction time period for restricting establishment of the NAS connection for the specific communication until expiry of the restriction time period.

Abstract: A mobile communication method according to the present invention includes the steps of: transmitting, from an LTE-AS function to an EMM function, a reconnection request, when the LTE-AS function detects that an RRC connection is chanted to an idle state; and transmitting, at the EMM function, a service request, when the EMM function receives the reconnection request and detects that the LTE-AS function is in a coverage area.

Abstract: A mobile station (UE) according to the present invention includes: a storage unit (23) configured to store first RAT priority information; a receiving unit (13) configured to receive second RAT priority information and RAT indication information from a radio base station; a camp-on processing unit (12) configured to camp on a cell of a second RAT designated by the second RAT priority information, when a first RAT designated by the first RAT priority information is different from the second RAT, and when the first RAT coincides with a third RAT designated by the RAT indication information; and a display unit (31) configured to show that the mobile station (UE) is camping on the first RAT, when the first RAT is different from the second RAT, and when the first RAT coincides with the third RAT.

Abstract: In a mobile communication method, when a mobile station UE has moved from an area inside UTRAN to an area inside E-UTRAN, a connection process with “Default APN” is executed if no connection with the “Default APN” is established even if it is determined that no position registration process need to be executed for the E-UTRAN.

Abstract: A communication method according to the present invention includes: transmitting, at a radio base station device (b), broadcast information for notifying a first area and a second area; transmitting, from a first mobile terminal to a radio control device (c), a first location registration request signal for the first area included in the broadcast information, when the first area is not identical to a first area stored as a current location registration area; and transmitting, from a second mobile terminal to the radio control device (c), a second location registration request signal for the second area included in the broadcast information, when the second area is not included in a second area group stored as a current location registration area.

Abstract: A radio communication system includes an EPC 100, a 3G network 200 and a mobile station 10 connectable to an external network 300 via any one of the EPC 100 and the 3G network 200. The communication system includes: a handover function unit configured to control a handover from the EPC 100 to the 3G network 200. The number of EPS bearers allowed to be set up with the mobile station 10 and the EPC 100 is larger than the number of PDP contexts allowed to be set up with the mobile station 10 and the 3G network 200. The handover function unit controls the handover in accordance with the number of the EPS beaters already set up with the mobile station 10 and the EPC 100 and the number of the PDP contexts to be newly set up with the mobile station 10 and the 3G network 200.

Abstract: An object of the present invention is to avoid congestion, by restricting only processing which causes the congestion without affecting processing which essentially should not be restricted. In a mobile communication system according to the present invention, an exchange MSC/SGSN includes: a congestion factor detector configured to detect a congestion occurrence factor in the switching exchange MSC/SGSN, and a restriction indication transmitter configured to transmit, a restriction indication, to a radio network controller, based on the detected congestion occurrence factor, the restriction indication instructing a processing type that should be restricted in the switching exchange MSC/SGSN congestion occurrence factor. The radio network controller RNC is provided with a broadcast information transmitter configured to transmit broadcast information including the received restriction indication to a mobile station UE.

Abstract: A packet communication method of the present invention includes a step of: receiving, at a mobile station (UE), restriction information for accepting an incoming call and restricting an outgoing call; establishing, at the mobile station (UE), a control path with a packet exchange (SGSN) in response to incoming of paging for the mobile station (UE); sending, the packet exchange (SGSN), a message instructing to establish the data path via the control path; and establishing, at the mobile station (UE), the data path by calling to the packet exchange (SGSN), when the mobile station (UE) receives the message after the mobile station (UE) has received the restriction information.

Abstract: When a browser is started up by a user, a packet call establishment request unit of a cellular phone requests the start of processing for establishing a packet call, and a communication control unit executes a packet all establishment processing. A mobile communication network sends a packet call establishment response message to the cellular phone, then sends packet data. A packet date storage unit of the cellular phone stores the packet data in a memory when packet data is received before the packet call establishment response message. If the packet call establishment response message is received thereafter, the packet data storage unit reads the packet data from the memory, and deletes the packet data from the memory. The packet processing execution unit displays a screen corresponding to the packet data on the display. Thereby, instances when packet data is discarded is decreased.

Abstract: An object of the present invention is to avoid congestion, by restricting only processing which causes the congestion without affecting processing which essentially should not be restricted. In a mobile communication system according to the present invention, an exchange MSC/SGSN includes: a congestion factor detector configured to detect a congestion occurrence factor in the switching exchange MSC/SGSN, and a restriction indication transmitter configured to transmit, a restriction indication, to a radio network controller, based on the detected congestion occurrence factor, the restriction indication instructing a processing type that should be restricted in the switching exchange MSC/SGSN congestion occurrence factor. The radio network controller RNC is provided with a broadcast information transmitter configured to transmit broadcast information including the received restriction indication to a mobile station UE.

Abstract: An object of the present invention is to allow a cellular phone to establish a video-phone call even when there is an incoming video-phone call during the packet communications. The cellular phone system comprises a cellular phone and the Mobile Multimedia Switching Center (MMS). The MMS comprises a call type judgment section that judges, when a call request is made to the cellular phone, whether the call request is for a video-phone call; a communication status judgment section that judges whether the cellular phone is performing packet communications; and an adding section that adds call information to the effect that the call request is for a video-phone call to an incoming call signal in cases where the call request is for a video-phone call and packet communications are being performed.

Abstract: Provided are a mobile device and location registration method that, even when packet communications are being restricted and the location cannot be registered, the location can be registered rapidly when the access restriction is released.