1
Takafumi Chujo, Hiroaki Komine, Keiji Miyazaki, Takao Ogura, Tetsuo Soejima: Method for searching for alternate path in communication network. Fujitsu, Staas & Halsey, June 8, 1993: US05218601 (85 worldwide citation)

A method includes the steps of a failure which occurs in a node or link, and b) identifying at most N (N is an integer equal to or greater than 2) nodes contained in each path affected by the occurrence of the failure. Each path is connected to a sender node which detects the failure, information is ...


2
Hiroaki Komine, Takafumi Chujo, Keiji Miyazaki, Takao Ogura, Tetsuo Soejima: Communication system using establishing network route. Fujitsu, Greer Burns & Crain, February 18, 1997: US05604868 (63 worldwide citation)

A communication system using a network route establishing technique for a network having a plurality of nodes connected through links, in which a route search message is delivered simultaneously in a plurality of directions from a sender node through a network route to a destination node, and a conf ...


3
Yasuyuki Sato, Keiji Miyazaki, Kohei Iseda, Takafumi Chujo: Searching system for determining alternative routes during failure in a network of links and nodes. Fujitsu, April 30, 1996: US05513345 (49 worldwide citation)

A system for searching for alternative routes in a network at the time of a failure in a node or link which executes a stage for initiation of failure restoration processing which starts up failure restoration processing in accordance with various types of messages when a failure occurs at a link or ...


4
Hiroaki Komine, Takafumi Chujo, Tetsuo Soejima, Keiji Miyazaki, Takao Ogura: Route switching system in communications network. Fujitsu, Staas & Halsey, December 7, 1993: US05268897 (43 worldwide citation)

A route switching system in a communications network constituted of a transmitter and a receiver connected by a plurality of routes for switching a first route along which communication is being held by transmission of cells to a second route causing no blocking. The route switching system comprises ...


5
Norihiko Shinomiya, Keiji Miyazaki, Yasuki Fujii: Protecting route design method in a communication network. Fujitsu, Katten Muchin Rosenman, March 6, 2007: US07188280 (38 worldwide citation)

A protecting route design method is disclosed for a communication network including a plurality of nodes having preset information on a protecting route to switch over in parallel from a working route thereto when link or node failure occurs, according to a failure notification message including fai ...


6
Takafumi Chujo, Hiroaki Komine, Keiji Miyazaki, Takao Ogura, Tetsuo Soejima: Method for structuring communications network based on asynchronous transfer mode. Fujitsu, Staas & Halsey, May 2, 1995: US05412376 (30 worldwide citation)

A method for structuring a communications network based on an asynchronous transfer mode in which communications are held with the use of cells transferred between a node on the upstream side and a node on the downstream side. The method for structuring the network includes a step for preparing a pl ...


7
Yasuyuki Sato, Keiji Miyazaki, Yasuki Fujii, Mitsuhiro Azuma, Takafumi Chujo: Path switching system and method. Fujitsu, Helfgott & Karas P C, July 14, 1998: US05781528 (26 worldwide citation)

A path switching system and method for a multiple-node ATM network, in which a plurality of paths can be simultaneously switched preserving proper correspondence thereof. A key choosing unit provided in a node chooses first and second sorting keys out of the virtual paths between the nodes, based on ...


8
Akira Nagata, Akira Chugo, Keiji Miyazaki, Hitoshi Ueno, Kiyoshi Sugita, Takashi Onodera, Masahiko Ohashi: Virtual LAN creation device. Fujitsu, Katten Muchin Rosenman, November 10, 2009: US07616589 (17 worldwide citation)

A spanning tree creation unit creates a plurality of spanning trees based on the network topology, and registers the spanning trees to a spanning tree information table. A spanning tree selection unit selects a spanning tree wherein communication resources will be used most effectively, out of the p ...


9
Keiji Miyazaki, Yasuki Fujii, Shinya Kano, Akira Nagata: Method and apparatus for allocating label to path in ring network. Fujitsu, Katten Muchin Rosenman, March 16, 2010: US07680136 (6 worldwide citation)

A transmission device, which carries out a route control of a frame based on a label included in the frame in a ring network, includes: a generating unit that generates a message for collecting information on first/second labels allocatable to working/standby routes; a transmitting unit that transmi ...


10
Norihiko Shinomiya, Akira Chugo, Keiji Miyazaki, Masatake Miyabe: Network design device. Fujitsu, Katten Muchin Rosenman, July 7, 2009: US07558284 (5 worldwide citation)

A network design device includes: a division section for dividing a network having a plurality of channels and branch nodes into a plurality of linear partial networks using a predetermined terminating node or each branch node as the terminating nodes by allocating a device terminating one or more c ...