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:
Dec. 17, 2002
Filed:
Mar. 17, 1999
Gerald Richard Ash, West Long Branch, NJ (US);
Jiayu Chen, Morganville, NJ (US);
Saul Daniel Fishman, Edison, NJ (US);
Anurag S. Maunder, Scotch Plains, NJ (US);
AT&T Corp., New York, NY (US);
Abstract
An originating switch ( ) in a packet-based telecommunications network ( ) routes calls to a terminating switch using the combination of Success-to-the Top (STT) and Class-of-Service criterion. In routing a call to the terminating switch, the originating switch checks for available bandwidth for the class of service of the call on the direct path ( ) between switches. If the path has available bandwidth, the originating switch routes on the direct path. Otherwise, the originating switch searches for the most recently successful one of a plurality the via switches ( ) linking the originating and terminating switches to determine whether that via switch can successfully route the call to the terminating switch. If the most recently successful one of the via switches possesses available bandwidth to route the call in accordance with its class of service, the originating switch selects that via switch to route the call. Otherwise, if the most-recently successful via switch can not route the call, the originating switch searches for a next successful via switch. If none of the via switches can successfully route the call in accordance with its class of service, the originating switch will either attempt a route advance or crankback the call.