发明名称 |
Optical communication network and method for optically detecting a fault |
摘要 |
An optical communication network for quickly detecting faults and rerouting data using the optical signals in their light form, superimposes a monitoring signal on an optical data signal. The optical data signal and the monitoring signal are superimposed by, for example, wavelength-multiplexing or polarization-multiplexing. A receiving node receives the superimposed signal and splits it back into the optical data signal and the monitoring signal. A processor in the receiving node analyzes the monitoring signal to determine whether a fault exists in the transmission path. Similarly, the processor can analyze the data signal to determine whether a fault exists in a previous node or repeater. Once a fault is detected, the signal can be quickly rerouted (detoured) around the faulty section (node). <IMAGE> |
申请公布号 |
EP0779718(A2) |
申请公布日期 |
1997.06.18 |
申请号 |
EP19960119561 |
申请日期 |
1996.12.05 |
申请人 |
NEC CORPORATION |
发明人 |
SHIRAGAKI, TATSUYA;HENMI, NAOYA |
分类号 |
H04J14/00;H04B10/032;H04B10/038;H04B10/07;H04B10/077;H04B10/079;H04B10/27;H04B10/291;H04J14/02;H04Q3/52;H04Q11/00 |
主分类号 |
H04J14/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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