Multiplex communications – Fault recovery – Bypass an inoperative channel
Patent
1998-04-14
2000-12-19
Vu, Huy D.
Multiplex communications
Fault recovery
Bypass an inoperative channel
370227, H04L 1242
Patent
active
061635278
ABSTRACT:
An optical bi-directional line switched ring for performing adding and dropping of traffic into the traffic path and for performing ring and/or span protection switching. The optical bi-directional line switched ring include a plurality of nodes, each node having multiple input demultiplexer/output multiplexer sections, a command and control channel having multiple fibers, and up to N-1 slave circuits. Each multiple input demultiplexer/output multiplexer sections has an input demultiplexer to receive and demultiplex signals from a fiber and an output multiplexer to receive the demultiplexed wavelengths from internally and multiplex them into an outgoing signal. The command and control channel can be a standard bi-directional line switch that has one channel coupled to each fiber of the system. Each slave circuit comprising a plurality optical switching circuits coupled to the multiple input demultiplexer/output multiplexer sections such that the optical switching circuits are operable to carry up to N wavelengths of traffic. The command and control channel in conjunction with a SONET bi-directional line switched ring monitors the plurality of lines in the bi-directional line switched ring to control the operation of the optical add/drop multiplexer in response to the sensed signals on the plurality of lines. If a disruption of traffic occurs, the command and control channel will so indicate and will use the optical switching circuits that are slaved to it to re-route and protect traffic.
REFERENCES:
patent: 5717796 (1998-02-01), Clendening
patent: 5751454 (1998-05-01), MacDonald
patent: 5844889 (1998-12-01), Takatsu et al.
patent: 5903371 (1999-05-01), Arecco et al.
Multiwavelength Survivable Ring Network Architectures by A.F. Elrefaie for Bellcore of Red Bank, N.J. 07701, USA. Publication Date May 23, 1993.
Transport Network Involving a Reconfigurable WDM Network Layer--A European Demonstration by Sonny Johansson; Journal of Lightwave Technology. vol. 14, No. 6, Jun. 1996.
Dempsey Don G.
Ester Gary W.
Alcatel
Vu Huy D.
LandOfFree
Method and apparatus for an optical bi-directional line switched does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for an optical bi-directional line switched, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for an optical bi-directional line switched will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-276194