Nec Corporation

Takuo Akimoto

Yasuhiro Watanabe

Osamu Kurokawa

Takayuki Kido

Yusuke Miyagawa

Hiroaki Akiyama

Yuki Nakanishi

Naoki Yoshida

Shunsuke Yokouchi

Takeshi B Nishimura

Kazuki Eguchi

Tomoya Kogure

Daisuke Nakamura

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 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 communication system of the present invention is a communication system connected to a public communication network including emergency organization communication apparatus (), the communication system includes femto base station () wirelessly connected to wireless terminal (), wherein femto base station () includes a first communication controller that attaches first location information, which is information for identifying a location of femto base station () or for identifying a location of an assembly of a plurality of base stations including femto base station (), to a SIP message in order to notify the first location information to emergency organization communication apparatus () when there is a call from wireless terminal (), and transmits the SIP message to another apparatus.

Communication system, femto base station, call session control server, home subscriber server, communication method, and program

Provided is a broadcast control apparatus that realizes broadcasting to a predetermined distribution area, as in an existing public mobile communication network in a communication system using a femto cell base station. The broadcast control apparatus includes a database, in which location information of the femto cell base station existing in a predetermined distribution area section is associated with the distribution area section. The broadcast control apparatus also includes update means for updating the association in the database based on the location information of the femto cell base station received by reception means.

Broadcast distribution control device, call status control device, femto cell base station, communication system, method and programme

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 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.

Femtocell communication system, apparatus, control method, and program

A Femto Access Point includes determination means for determining whether or not called side user equipment is accommodated in the Femto Access Point; and communication control means for, if the determination means has determined that the called side user equipment is accommodated in the Femto Access Point, sending out a Ring Back Tone to calling side user equipment.

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Tokyo, Japan

Takuo Akimoto