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:
Jan. 27, 2009
Filed:
Dec. 20, 2002
Peter Giese, Kinburn, CA;
Wang-hsin Peng, Ottawa, CA;
Donald Ellis, Ottawa, CA;
Nortel Networks Limited, St. Laurent, Quebec, CA;
Abstract
A system and method for clock synchronization in a network having one or more asynchronous data links is provided. A clock signal is propagated through, at the physical layer, a sequence of network devices linking a source network device to a destination network device of the network. Each asynchronous data link between the source network device and the destination network device is adapted to receive an incoming clock signal from the previous network device and then provide a clock signal synchronized to the received clock signal to the next network device of the sequence. At the same time, each network device of an asynchronous segment of the network can continue to transmit packets of data asynchronously. By locking the link-based frequency on a per link bases, the receiver clocks located at the edge of a network can be tied directly to a primary source located in the core network.