| 摘要 |
<p>The present invention refers to a method for monitoring an optical gate (9) of a packet add/drop structure (1, 101, 201, 310, 401, 501) of an optical packet switching node (100) of a wavelength division multiplexing optical network, the packet add/drop structure (1, 101, 201, 310, 401, 501) comprising:
- a switching structure (6) comprising a demultiplexer (7) linked to an input (601) of the switching structure (6), a multiplexer (11) linked to an output (602) of the switching structure (6) and a plurality of optical gates (9) set in parallel between the demultiplexer (7) and the multiplexer (11), an optical gate (9) being configured to filter out, in a blocking state, or to let pass, in a passing state, a packet received by the optical gate (9), wherein the output of the switching structure (6) is also transmitted to a fast tunable receiver (5) which is configured for:
- being tuned to a wavelength corresponding to a channel for which an associated optical gate (9) is monitored,
- measuring the optical power level of that said wavelength at the output (602) of the switching structure (6),
- comparing the measured optical power level with at least one predetermined threshold according to the state of the monitored optical gate (9).</p> |
