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. 14, 2004
Filed:
Oct. 31, 2000
Patrick Goldsack, Bristol, GB;
Jeremy Peter William Brown, Edinburgh, GB;
Brian Warren Woodroffe, Edinburgh, GB;
Simon Love, Edinburgh, GB;
James W. Davis, Sunnyvale, CA (US);
Agilent Technologies, Inc., Palo Alto, CA (US);
Abstract
Data cells traversing an Asynchronous Transfer Mode (ATM) network ( ) are passively monitored by probes at two spaced points ( ). A filtering characteristic is applied to select cells comparatively infrequently, and timestamps or sequence numbers (or both) for the cells selected at each point are forwarded to a correlator ( ). The correlator identifies similarities in the temporal patterns of intervals between timestamps received from each probe, and uses these similarities to identify and correlate timestamps relating to occurrence of the same cell at the two monitored points. The correlated timestamps are used to determine parameters indicative of the performance of the network, such as one-way delay, variation in that delay, and rate of cell loss.