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:
Mar. 01, 2005
Filed:
Jan. 27, 2003
Jane Marie Simmons, Eatontown, NJ (US);
Jane Marie Simmons, Eatontown, NJ (US);
AT&T Corp., New York, NY (US);
Abstract
The present invention is a telecommunications network having a hierarchical architecture which reduces the amount of equipment and processing required to recover from network failures. In an exemplary embodiment, the nodes of the network are divided into high level nodes and low level nodes. High granularity traffic is collected, routed and manipulated at high level nodes, but generally passes through low level nodes, which generally lack the capability for routing and manipulating such high granularity traffic. Equipment savings results from low level nodes lacking the capability to manipulate traffic other than traffic relevant to those nodes or nearby nodes. Each high level node pair is connected by at least three node disjoint paths of low level nodes and links. Less protection capacity is needed, as each node disjoint path is expected to handle only a portion of rerouted traffic in the event of a network equipment failure. Recovery is decentralized, and is thus faster, requires less equipment, and is less susceptible to the failure of a centralized controller than with networks using centralized recovery processing.