Hitachi, Ltd.

Mitsubishi Gas Chemical Company, Inc.

Pi R&d Co., Ltd.

Kao Corporation

Masashi Yano

Naruhito Nakahara

Masahiro Takatori

Seishi Hanaoka

Hitomi Nakamura

Susumu Matsui

Tetsuhiko Hirata

Nodoka Mimura

Norihisa Matsumoto

Takehiro Morishige

Mitsuru Nozaki

Eiji Nagata

Toshiaki Suzuki

Hiroki Ikeda

Kazuma Yumoto

Yoshinori Inagawa

Shin Koike

Mika Mizutani

Shiro Tanabe

Tsutomu Nishide

Junji Yamamoto

Yoshinobu Nakajima

Shoji Fukuzawa

Shigemi Tsuchiya

Mariko Yamada

Ryouji Yamaoka

Yoshio Kawaseki

Daisuke Ishii

Yasuo Tanaka

Koji Watanabe

Toshiro Suzuki

Yasuhiko Sasaki

Morio Gaku

Daisuke Matsubara

Katsuhiko Tsunehara

Satoshi Yoshizawa

Koji Wakayama

Yosuke Takahashi

Hideya Yoshiuchi

Michitaka Okuno

Akihiro Nomoto

Yoshihiro Shimizu

Akira Date

Lan Jun Wang

Toru Ishikawa

Zhisheng Niu

Takumi Oishi

Hiroaki Nakazawa

Hui Deng

Tsutomu Hirao

Yoshinobu Yamamoto

Tsutomu Uchida

Yuichiro Katsu

Yuta Muto

Takabumi Omori

Masaya Hayashi

Noriyuki Sugiura

Tetsuo Yamaoka, Legal Representative

Atsushi Teshima

Hideo Munehiro

Yasuo Kikuchi

Jousuke Matsuki

Norikatsu Akiyama

Makoto Arai

Takabumi Oomori

The problem of the invention is to provide a resin composite electrolytic copper foil having further improved heat resistance and improved plate adhesion strength when plated after desmear treatment in the work process of an additive method. The solution is to form a roughened surface having a plurality of minute projections, a surface roughness (Rz) within a range of 1.0 pm to 3.0 pm and a lightness value of not more than 30 on one surface of an electrolytic copper foil (A), and form a layer of a resin composition (B) containing a block copolymerized polyimide resin (a) having a structure that imide oligomers of a first structural unit and a second structural unit are bonded alternately and repeatedly on the roughened surface.

Resin composite electrolytic copper foil, copper clad laminate and printed wiring board

A communication system comprising computers and a management computer, wherein the computers include a communication control unit configured to control a communication using a session of a terminal. The communication control unit manages a database storing in a plurality of pieces of session information. The management computer includes property management information for managing a property of each of the plurality of pieces of session information. The session information migration control unit is configured to: detect a migration trigger of the plurality of pieces of session information stored in a first database; select the plurality of pieces of session information from the plurality of pieces of session information stored in the first database based on the property management information; determine a migration order for the selected plurality of pieces of session information based on the property of the each of the selected plurality of pieces of session information.

Communication system, management computer, and session information migration method

Appropriate bandwidths are allocated to base stations in response to variations in the arrangement of mobile terminals and according to the type of mobile terminals. Mobile gateways disposed between a plurality of base stations connecting a plurality of mobile terminals and a service network include a base station information acquiring unit that acquires communication capacities of the base stations; a mobile terminal information acquiring unit that acquires a communication capacity of each type of the mobile terminals; a communication bandwidth estimating unit that estimates the communication bandwidths of the base stations on the basis of the acquired communication capacities of the base stations and the acquired communication capacities of mobile terminals; and a communication bandwidth control unit that controls communication bandwidths corresponding to the base stations on the basis of the estimated communication bandwidth.

Mobile gateway, control method for the same, and radio access network equipped with the same

After a first base station connects to a first mobile terminal, a first GW (gateway) receives a request for connection between the first mobile terminal and a second GW and identifiers of the second GW and the first mobile terminal and transmits identifiers of the first mobile terminal and the first GW to the second GW. The second GW transmits an MPLS allocation flag to the first GW. The first GW transmits an MPLS allocation signal including an identifier of the first mobile terminal to the second GW via a second NW (network) apparatus. The first base station receives an identifier of the first GW and the MPLS allocation flag from the first GW via a management server and transmits the MPLS allocation signal including the identifier of the first mobile terminal to the first GW via a first NW apparatus.

Network system including radio network using MPLS

In a wireless communication system including a plurality of base station controllers different in wireless communication method, each of which accommodates a plurality of base stations, a home agent apparatus connected to the base station controllers, and a monitoring apparatus connected to each of the base stations and the base station controllers, the monitoring apparatus acquires communication quality information of each wireless terminal from each of the base stations, and selects a wireless base station having a wireless communication path suitable for the wireless terminal from among wireless base stations different in communication method to which the wireless terminal is connected.

Wireless communication system and monitoring apparatus selectable optimum wireless communication method

In order to solve the problem in that information relating to a specific purpose can be saved in the internal memory of a mobile apparatus on which a permanent memory is mounted while information relating to other purpose cannot be saved in the internal memory of the apparatus, the purpose of each telephone call is distinguished by sending a non-telephone type notice before transferring the call and thus the user can determine whether the call should be saved or not.

Highly secured portable telephone system and information system

Disclosed is a mobile communication system preventing the transmission of acknowledgements at a burst leading to a decrease in throughput caused by detecting the retransmission and the congestion of packets at the protocol of a transport layer. In a mobile communication system including a mobile terminal and gateway equipment for relaying a packet between a communication partner and the mobile terminal, if the gateway equipment receives the acknowledgement from the mobile terminal, the gateway equipment waits the transmission of the received acknowledgement to the communication partner until the estimated transmission time passes from the time at which the gateway equipment receives the previous acknowledgement from the mobile terminal.

Mobile communication system and communication method

To control the communication quality on the terminal basis without making the base station more complicated, it is provided a communication system, comprising at least one computer and a gateway that is connected to the at least one computer through a first network. The gateway is connected to at least one terminal through a second network. The at least one terminal performs communications with the at least one computer via the gateway. The gateway estimates quality of the communications between the gateway and the at least one computer in the first network; and determines a priority for the communications between the gateway and the at least one terminal in the second network according to the estimated quality of the communications in the first network.

Communication system and gateway apparatus

A communication system which includes plural radio systems, and which connects to a terminal apparatus corresponding to the plural radio systems, comprising: access points for the each radio system; gateways; an authentication apparatus; and a home agent. The authentication apparatus being shared by the plural radio systems: assigns an IP address to the terminal apparatus in a radio system which is initially connected among the plural radio systems according to an IP address assignment request from the terminal; judges whether an IP address assignment request for a radio system to be subsequently connected is from the same terminal apparatus by using an unique identifier of the terminal; and assigns the IP address assigned in the initially connected radio system to the terminal apparatus in the radio system to be subsequently connected in a case where the assignment request is determined to be from the same terminal apparatus.

Communication system using multi-radio mode, monitor node apparatus, control node apparatus and base station apparatus

It is provided a mobile communication system comprising base stations, call control servers and access gateways. The call control servers cause a mobile terminal accommodated in one of the control server to transmit the location registration request so that the mobile terminal accommodates in another control server according to a processing amount of control signals. The base station selects a second call control server into which the one of the mobile terminals is to be newly accommodated. The one of the call control server switches to a power-saving state after the mobile terminal is accommodated into the another call control server.

Mobile communication system for low power consumption, call control server and access gateway

A base station accommodation server can appropriately set a location registration area according to an installation location of a femto base station. The base station accommodation server is coupled to a location management server accommodating at least one first base station coupled to a first communication network, and accommodates at least one second base station connected to a second communication network. The base station is configured to determine a location management group identifier of the second base station based on a location management group identifier of the first base station that is present at a location from which the second base station can receive the location management group identifier broadcast by the first base station.

Wireless communication system and base station accommodation server

A communication system comprising a home server, an access gateway, and a policy server, wherein the policy server transmits, to the first access gateway, a link creation request for associating a communication path of the first terminal and a communication path of the second terminal; and the access gateway sets a fifth communication path which connects the first communication path and the third communication path upon receiving the link creation request, records information on the set fifth communication path in the communication path management information, and transmits the data from the first terminal via the first communication path to the second terminal via the fifth communication path and the third communication path based on the communication path management information.

Communication system and access gateway apparatus

A session QoS control arrangement wherein for an occurrence of user session information indicating a change of user state and/or a change of session condition from a user communication terminal: said session information analysis means analyses the session state of the user terminal in real-time by referring to said session management database and said user preference database; and, said session QoS control means determines the QoS policy for the user session in real-time, based on the result of session analysis performed by said session information analysis means.

Session QoS control apparatus

To prevent a hung-up of communications due to changes in a radio wave condition resulting from frequent displacement of the terminals and changes in a number of the terminals, and to realize switching of the radio systems adapting to the radio condition. A radio communication system comprising: a base station for providing a plurality of radio systems, and terminals for communicating with the base station through the plurality of radio systems. The base station decides a priority of the radio system on which the each terminal will communicate thereafter and transmits paging signals of one of the plurality of radio systems which includes information on the decided priority to the each terminal.

Cognitive wireless communication system

A relay gateway apparatus (HandOver-Gateway (HO-GW) is provided between heterogeneous access networks (a WiMAX access network and a UMB access network). The HO-GW performs conversion of a movement control signal (an Inter-Access Gateway (AGW) handover control signal) and relay of communication data. When the relay is performed, user data from a correspondent node (CN) reaches a wireless terminal (mobile node (MN)) through a host agent (HA) of a core network, an access router ASN-GW, the HO-GW, and a base station eBS.

Growing community of inventors

Kawasaki, Japan

Masashi Yano