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:
Nov. 06, 2007
Filed:
Nov. 29, 2002
Saravut Charcranoon, Richardson, TX (US);
Saravut Charcranoon, Richardson, TX (US);
Alcatel Lucent, Paris, FR;
Abstract
An architecture for measurement of per-hop, one-way delay includes a input observation circuit () at the input interface of a node () and a output observation circuit () at the output interface () of a node (). The input observation circuit () copies and time stamps the headers of incoming packets, and filters packets according to an aggregate definition. Similarly, the output observation circuit () copies and time stamps the headers of outgoing packets, and filters packets according to the aggregate definition. The incoming and outgoing traces are correlated to calculate a delay measurement. A packet loss measurement uses input observation circuits (and) at the input interfaces () of upstream and downstream nodes (and) and an output observation circuitat the output interface () of the upstream node. The observation circuits (and) determine the number of lost packets across a node and between nodes, according to an aggregate definition.