Nec Corporation

Nec Commuication Systems Ltd.

Takayuki Kido

Yasuhiro Watanabe

Osamu Kurokawa

Hiroaki Akiyama

Yusuke Miyagawa

Takuo Akimoto

Kazuki Eguchi

Naoki Yoshida

Shunsuke Yokouchi

Yasuyuki Ueda

Yuki Nakanishi

Toru Shiiba

Tomiharu Hamaguchi

Takeshi B Nishimura

Koki Hayashi

Yuichiro Kameoka

Tomiharu Hamguchi

Yasuo Kanazawa

Akatsuki Minami

Tomoya Kogure

When a representative PS server receives a P-TMSI contained in a PDP context succession request signal from a UE according to a handover communication procedure prescribed in an applicable standard after the UE moves, if the PS server identified with the identification information contained in the received P-TMSI is not its own representative PS server, the representative PS server identifies the PS server identified with the identification information as a PS server that manages a femtocell base station to which the UE belonged before it moved and forwards the PDP context succession request signal to the identified PS server.

Communication system

AS-B () measures a telephone call time from a time point when a telephone call, which is audio-originated by UE (), starts. When a time obtained by subtracting the telephone call time from a time for which the UE () can telephone-call becomes a predetermined time, the AS-B () issues a multiplex instruction to FAP (). When having received the multiplex instruction, the FAP () multiplexes a sound, which is based on a sound source file stored in advance, with audio data to be transmitted to the UE (), and transmits the audio data, with which the sound has been multiplexed, to the UE ().

When a femto cell base station used for a communication system provided with a function of providing a predetermined supplementary service receives first information indicating supplementary service control from a radio terminal, the femto cell base station converts the received information to a SIP (Session Initiation Protocol) message including the first information and transmits the SIP message to a higher apparatus in the communication system.

Communication system and apparatus for providing supplementary service in femto cell

When a representative service control device receives a PDP context succession request signal according to a handover communication procedure prescribed in an applicable standard, the representative service control device transmits a P-TMSI contained in the PDP context succession request signal as an address request to a database device. When the representative service control device receives address information of a service control device from the database device, the representative service control device forwards the PDP context succession request signal received from the request transmission means to the received address.

When a voice call is made from or received by UE () that is present in both 3G femto area () and LTE area (), line switching for making a voice call or receiving a voice call is performed from MME () to P-CSCF () by using a predetermined protocol.

Communication system for LTE network

In order to enable a communication system introduced with a femtocell base station using an IMS network, to perform PS service similar to that of the existing 3G network, a service control apparatus (SGSN functional unit), based on the UE's message transmitted to the femtocell base station (FAP), acquires UE's subscriber information for PS (Packet Switching) service, from a HLR and registers the subscriber information in a VLR that is present on the IMS network. Then, service control apparatus performs PS service based on the subscriber information registered in the VLR.

Service control apparatus, relay apparatus, femtocell base station, communication system, control method and program

A femto cell base station includes a generating part that generates a SIP message including a terminal ID of a radio terminal and a check request for the terminal ID at a predetermined time, and a first transmitting part that transmits the SIP message generated by the generating part to a higher level apparatus in the communication system.

Communication system for checking for unauthorized use of a terminal

A femtocell base station (FAP) converts, when information concerning a SMS is received from UE (User Equipment), the received information concerning the SMS into a SIP (Session Initiation Protocol) message including the received information concerning the SMS and transmits the converted SIP message to the core network side. The femtocell base station converts, when a SIP message including information concerning the SMS is received from the core network side, the information concerning the SMS included in the received SIP message into a message that can be recognized by the UE and transmits the converted information concerning the SMS to the UE.

Femtocell base station, gateway system, MAP-GW apparatus, communication system, control method, and program

A communication system for solving a problem, in which secure communications security cannot be ensured in communications between a femtocell base station and UE, is provided. The communication system includes UE (User Equipment) and an HLR (Home Location Register) used in an IMS (IP Multimedia subsystem) network and a femtocell base station (Femto AP) that constructs a predetermined communication area. The femtocell base station exists between the UE and the HLR, acquires a concealment key corresponding to the UE from the HLR during authentication of the UE, and executes a concealment process to conceal the identity of the UE based on the concealment key.

Communication system, femtocell base station, authentication apparatus, communication method, and recording medium

When accepting an establishment request (Cx-LIR) for establishing an information communication path between a sending-side UE and a receiving-side UE, an HSS performs control so as to establish the information communication path between the sending-side UE and the receiving-side UE via an MGW and an existing 3G network if the receiving-side UE exists in an IMS network and is a communication interception target terminal.

Management apparatus, control apparatus, communication system, control method and program

The femto cell base station is a femto cell base station that connects a UE (User Equipment) to a core network side and includes storing means and control means. The storing means retains subscriber information of the UE visiting an area under control of the femto cell base station. The control means deletes the subscriber information of the UE, that is removed from the control of the femto cell base station, from the storing means.

Femto cell base station, communication control apparatus, communication system, control method and program

A communication system that includes at least UE and an HLR that are used in an IMS network further includes: a Femto-cell base station that makes up a predetermined communication area, and a control unit for controlling at least communication between the UE and the HLR. The Femto-cell base station and the control unit are present between the UE and the HLR. The Femto-cell base station includes a transmission unit for transmitting messages received from the UE to the control unit and for transmitting messages received from the control unit to the UE. The control unit converts messages received from the Femto-cell base station to messages that can be recognized by the HLR, and converts messages received from the HLR to messages that can be recognized by the UE.

Communication system, femto-cell base station, authentication device, communication method, and memory medium

A Femtocell base station has a determination means and a transmission means. The determination means, upon receiving a location update request message from UE (User Equipment), determines whether a first message that prompts the UE to again attempt a location update should be transmitted to the UE, whether a second message that prompts the UE to divert to another network should be transmitted to the UE, or whether a third message that notifies the UE that the location update request is accepted should be transmitted to the UE. The transmission means transmits to the UE either the first message, or the second message, or the third message in accordance with the determination of the determination means.

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Tokyo, Japan

Takayuki Kido