Method of initializing optical communication links
AssigneeNortel Networks Limited
InventorsJames Harley, Kim B. Roberts
Life of this patent
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Abstract
A method of initializing an optical communication link between nodes. Optical transmitters adapted to pre-compensate link impairments based upon an optical compensation parameters are utilized to establish an optical communications link. Pre-compensation parameter values are selected at a node for generating an optical signal. The value is selected until confirmation from the remote node is received that the optical signal transmission has been successful. The successful pre-compensation parameter value is then used to generate the optical signal for the communications link.
Claims12
A method of initializing an optical communications link between first and second nodes, the method comprising steps of:
- selecting a candidate value of a predetermined compensation parameter by any one of:
- incremental selection across a predetermined range of candidate values;
- random selection from a predetermined set of candidate values;
- and
- an interleaving binary search algorithm of predetermined candidate values;
- supplying the selected candidate value to a transmitter of the first node, the transmitter using the candidate value to generate a pre-compensated optical signal;
- transmitting the pre-compensated optical signal to the second node;
- receiving an operating value at the first node, the operating value being indicative that the second node has successfully received the pre-compensated optical signal;
- and
- supplying the received operating value to the transmitter of the first node, the transmitter subsequently using the operating value to generate the pre-compensated optical signal.
A system for initializing an optical communications link between first and second nodes, the system comprising:
- a processor of the first node operative to:
- select a candidate value of a predetermined compensation parameter, and supply the selected candidate value to a transmitter of the first node, the transmitter generating a pre-compensated optical signal based on the candidate value and transmitting the pre-compensated optical signal to the second node via the optical communications link;
- and
- receive an operating value of the compensation parameter, the operating value being indicative that the second node has successfully received the pre-compensated optical signal;
- and
- supply the received operating value to the transmitter, the transmitter subsequently using the operating value to generate the pre-compensated optical signal;
- wherein the candidate value is selected by any one of:
- incremental selection across a predetermined range of candidate values;
- random selection from a predetermined set of candidate values;
- and
- an interleaving binary search algorithm of predetermined candidate values.
Dependencies are inferred from the claim text.