The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 02, 1995
Filed:
Feb. 17, 1994
Takafumi Chujo, Kawasaki, JP;
Hiroaki Komine, Kawasaki, JP;
Keiji Miyazaki, Kawasaki, JP;
Takao Ogura, Kawasaki, JP;
Tetsuo Soejima, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
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 plurality of VPI conversion tables for converting VPIs of the cell input under normal communicating conditions and that of the cell input in the event of a failure and outputting the cell with the VPI converted. The prepared VPI conversion tables are reorganized for each node and the reorganized VPI conversion tables are distributed to all nodes. Then, an alternate route monitoring and switching virtual path is set up in each alternate route and a monitoring cell is periodically transmitted along the alternate route. When a failure occurs, the VPI conversion table is switched over according to the pattern of the failure and the input VPI is converted in accordance with the switched VPI conversion table, and thereby, an alternate virtual path is set up in the relevant alternate route.