Optical communications – Fault recovery – In a repeater system
Reexamination Certificate
2007-12-17
2011-10-25
Sedighian, M. R. (Department: 2613)
Optical communications
Fault recovery
In a repeater system
C398S005000, C398S007000
Reexamination Certificate
active
08045851
ABSTRACT:
Methods and apparatuses for automatic restoration detection and automatic restoration of optical communication system are disclosed. In the methods, a first station sends an automatic restoration detection message to a second station at the opposite side of a failed link; in response to receiving an automatic restoration request message, determines that the link has been repaired in two directions, and sends an automatic restoration confirmation message to the second station; or in response to receiving the automatic restoration detection message, determines that the link from the second station to the first station has been repaired, and sends the automatic restoration request message to the second station; in response to receiving the automatic restoration confirmation message, determines that the link has been repaired in two directions; and switching to normal working states. The safety problem that the laser leakage occurs in the failed link is solved.
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Chen Juan
Li Congqi
Lu Yiquan
Wang Hao
Huawei Technologies Co. Ltd.
Sedighian M. R.
Slater & Matsil L.L.P.
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