Title:
光双方向ラインスイッチ形リングデータ通信システムの方法および装置
Document Type and Number:
Japanese Patent JP4070246
Kind Code:
B2
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.
Inventors:
Esther, Gary, W.
Dempsey, Donald, Gee.
Dempsey, Donald, Gee.
Application Number:
JP54423898A
Publication Date:
April 02, 2008
Filing Date:
April 14, 1998
Export Citation:
Assignee:
Alcatel Network Systems, Inc.
International Classes:
H04B10/27; H04B10/03; H04B10/032; H04B10/077; H04B10/275; H04B10/291; H04J14/02; H04L12/437; H04Q3/52; H04Q11/00
Domestic Patent References:
| JP8237195A | ||||
| JP818592A |
Foreign References:
| EP0651528A1 | ||||
| WO1996032787A1 | ||||
| WO1997001897A1 |
Attorney, Agent or Firm:
Hideto Asamura
Hajime Asamura
Kuniaki Shimizu
Hayashi Zouzo
Hajime Asamura
Kuniaki Shimizu
Hayashi Zouzo