Mitigating spectral excursions in passive optical networks
AssigneeCalix, Inc.
InventorsChristopher Thomas Bernard, Harold Ashton Roberts
Life of this patent
Estimating the term…
Abstract
Systems and techniques for mitigating spectral excursions in a passive optical network (PON) are described herein. A spectral excursion may be determined in the PON. The spectral excursion may indicate a laser transmission output on the PON at a wavelength that is outside a designated wavelength range. A duration may be identified for the spectral excursion. A first preamble offset may be generated using the duration of the spectral excursion. A round trip delay for the PON and a local time of day may be determined. The first preamble offset, the round trip delay, and the local time of day may be transmitted to an optical line terminal (OLT).
Claims26
A system for mitigating spectral excursions in a passive optical network (PON), the system comprising:
- at least one processor;
- and
- a memory including instructions that, when executed by the at least one processor, cause the at least one processor to perform operations to:
- determine a spectral excursion in the PON, wherein the spectral excursion indicates a laser transmission output on the PON at a wavelength that is outside a designated wavelength range;
- identify a duration of the spectral excursion;
- generate a first preamble offset using the duration of the spectral excursion;
- determine a round trip delay for the PON and a local time of day;
- and
- transmit the first preamble offset, the round trip delay, and the local time of day to an optical line terminal (OLT).
At least one non-transitory machine readable medium including instructions for mitigating spectral excursions in a passive optical network (PON) that, when executed by a machine, cause the machine to perform operations to:
- determine a spectral excursion in the PON, wherein the spectral excursion indicates a laser transmission output on the PON at a wavelength that is outside a designated wavelength range;
- identify a duration of the spectral excursion;
- generate a first preamble offset using the duration of the spectral excursion;
- determine a round trip delay for the PON and a local time of day;
- and
- transmit the first preamble offset, the round trip delay, and the local time of day to an optical line terminal (OLT).
A method for mitigating spectral excursions in a passive optical network (PON), the method comprising:
- determining a spectral excursion in the PON, wherein the spectral excursion indicates a laser transmission output on the PON at a wavelength that is outside a designated wavelength range;
- identifying a duration of the spectral excursion;
- generating a first preamble offset using the duration of the spectral excursion;
- determining a round trip delay for the PON and a local time of day;
- and
- transmitting the first preamble offset, the round trip delay, and the local time of day to an optical line terminal (OLT).
An optical line terminal (OLT) for mitigating spectral excursions in a passive optical network (PON), the OLT comprising:
- at least one processor;
- at least one transceiver;
- and
- a memory including instructions that, when executed by the at least one processor, cause the at least one processor to perform operations to:
- determine a spectral excursion in the PON, wherein the spectral excursion indicates a laser transmission output on the PON at a wavelength that is outside a designated wavelength range;
- identify a duration of the spectral excursion;
- generate a first preamble offset using the duration of the spectral excursion;
- determine a round trip delay for the PON and a local time of day;
- and
- transmit the first preamble offset, the round trip delay, and the local time of day to at least one other OLT.
An optical line terminal (OLT) for mitigating spectral excursions in a passive optical network (PON), the OLT comprising:
- at least one processor;
- at least one transceiver;
- at least one laser;
- and
- a memory including instructions that, when executed by the at least one processor, cause the at least one processor to perform operations to:
- receive a first preamble offset, a round trip delay, and a local time of day from another optical line terminal (OLT);
- synchronize an OLT time value with the local time of day;
- update a stored round trip delay value to match the received round trip delay;
- and
- modify a current preamble length using the received first preamble offset.
Dependencies are inferred from the claim text.