scispace - formally typeset
T

Takafumi Chujo

Researcher at Fujitsu

Publications -  40
Citations -  1071

Takafumi Chujo is an academic researcher from Fujitsu. The author has contributed to research in topics: Node (networking) & Network packet. The author has an hindex of 17, co-authored 40 publications receiving 1071 citations.

Papers
More filters
Patent

Distributed control of telecommunication network for setting up an alternative communication path

TL;DR: In this paper, a method for restoring a communication failure in a network comprises the steps of providing a predetermined order for selection to the links included in the network, searching an alternative communication path, and transmitting the first path setup message to a second node also included in a path and connected to the first node by a second link, for effecting a setup of connection therein.
Proceedings ArticleDOI

A distributed restoration algorithm for multiple-link and node failures of transport networks

TL;DR: A distributed restoration algorithm based on message flooding is described, an extension of a previously proposed algorithm for single-link failure that restores the network from multiple-link and node failures, using multidestination flooding and path route monitoring.
Patent

Method for searching for alternate path in communication network

TL;DR: In this article, the authors propose a method for identifying at most N nodes contained in each path affected by the occurrence of a failure, where each path is connected to a sender node which detects the failure, information is transferred to the sender node via the N nodes, and the sender nodes serves as a start point of each alternate path which is to be established.
Patent

Method and apparatus for evaluating QOS in ATM multiplexing apparatus in which priority control is performed and for controlling call admissions and optimizing priority control on the basis of the evaluation

TL;DR: In this paper, a probability transition matrix S t is formulated that expresses a multiplexing process which includes nested threshold priority control and classified priority control, and a state equation using the matrix is solved by substituting therein upper and lower bounds of a probability distribution of a cell arrival count a t in an average time series, to calculate the probability distribution in a buffer, from the thus calculated cell length probability distribution, the QOS is evaluated on a priority class basis.
Patent

Method and device for generating access-control lists

TL;DR: In this article, a method of generating access-control lists executable by a system and derived from access control rules supplied for insuring security of an operation system is presented, which includes the steps of inputting access-manager-type-group information, access-target-type group information, and organizational-structure information.