Patent · US Active

System and method for implementing fast layer 2 protection in passive optical networks

US7756018B2 · kind B2 · utility

1Cited by

4References

16Claims

0Family size

Assignee

Alcatel Lucent · FR

Inventors

Ljubisa Tancevski · Dallas, US
An Ge · Plano, US
Jessy Rouyer · Dallas, US
Nicolas Le Sauze · Les Ulis, FR

Key dates

Filing date	Nov 3, 2005
Grant date	Jul 13, 2010
Priority date	—
Expiry date	Dec 20, 2027

Classification

Technology area (CPC H)Electricity
CPC primaryH04Q2011/0081
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

System and method for providing fast protection in a passive optical network (“PON”) including two central hubs and a plurality of network nodes, wherein the network nodes are connected to a first of the central hubs by a first optical path and to a second of the central hubs by a second optical path. The method comprises setting the first and second central hubs to master mode and slave mode, respectively, such that only the first central hub transmits traffic to and from the network nodes; detecting a failure in the first optical path; exchanging status information between the first and second central hubs; and if no failure has occurred in the second optical path, setting the first and second central hubs to slave mode and master mode, respectively, such that only the second central hub transmits traffic to and from the network nodes.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.