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US 2019/0097720 A1Published application
Virtual optical network service with guaranteed availability
AssigneeFujitsu Limited
InventorsInwoong Kim, Xi Wang, Martin Bouda, Olga Vassilieva, Qiong Zhang, Paparao Palacharla, Tadashi Ikeuchi
Life of this patent
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Abstract
A method for VON service with guaranteed availability may use probability density functions (PDF) of Q-factor to determine availability of physical links assigned to a virtual link in the VON. Then, a VON mapping may be performed based on the determined availabilities, among other factors.
Claims22
A method, comprising:
- identifying an optical path that is used to represent a virtual link in a virtual optical network (VON), including identifying potential physical nodes and potential physical links for the optical path;
- determining a minimum availability associated with the virtual link;
- identifying a plurality of wavelength configurations for the optical path, the wavelength configurations comprising a modulation format, a forward error correction (FEC) ratio, a baud rate, and a launch optical power of an optical signal transmitted over the optical path;
- determining a probability density function (PDF) for an optical signal-to-noise ratio (OSNR) for the optical path;
- based on the PDF for the OSNR, respectively determining a PDF for a Q-factor for each of the wavelength configurations;
- from the PDFs for the Q-factor, respectively determining a calculated availability for each of the wavelength configurations using an integral of the PDF over the Q-factor;
- selecting a first wavelength configuration from the wavelength configurations using the calculated availability;
- and
- sending instructions to a transmitter and a receiver for the optical path to implement the wavelength configuration for the optical signal.
6 more elements
A network management system, comprising:
- a processor enabled to access a memory media storing instructions executable by the processor for:
- identifying an optical path that is used to represent a virtual link in a virtual optical network (VON), including identifying potential physical nodes and potential physical links for the optical path;
- determining a minimum availability associated with the virtual link;
- identifying a plurality of wavelength configurations for the optical path, the wavelength configurations comprising a modulation format, a forward error correction (FEC) ratio, a baud rate, and a launch optical power of an optical signal transmitted over the optical path;
- determining a probability density function (PDF) for an optical signal-to-noise ratio (OSNR) for the optical path;
- based on the PDF for the OSNR, respectively determining a PDF for a Q-factor for each of the wavelength configurations;
- from the PDFs for the Q-factor, respectively determining a calculated availability for each of the wavelength configurations using an integral of the PDF over the Q-factor;
- selecting a first wavelength configuration from the wavelength configurations using the calculated availability;
- and
- sending instructions to a transmitter and a receiver for the optical path to implement the wavelength configuration for the optical signal.
7 more elements
An optical network comprising:
- a network management system, further comprising a processor enabled to access a memory media storing instructions executable by the processor for:
- identifying an optical path that is used to represent a virtual link in a virtual optical network (VON), including identifying potential physical nodes and potential physical links in the optical network for the optical path;
- determining a minimum availability associated with the virtual link;
- identifying a plurality of wavelength configurations for the optical path, the wavelength configurations comprising a modulation format, a forward error correction (FEC) ratio, a baud rate, and a launch optical power of an optical signal transmitted over the optical path;
- determining a probability density function (PDF) for an optical signal-to-noise ratio (OSNR) for the optical path;
- based on the PDF for the OSNR, respectively determining a PDF for a Q-factor for each of the wavelength configurations;
- from the PDFs for the Q-factor, respectively determining a calculated availability for each of the wavelength configurations using an integral of the PDF over the Q-factor;
- selecting a first wavelength configuration from the wavelength configurations the calculated availability;
- and
- sending instructions to a transmitter and a receiver for the optical path to implement the wavelength configuration for the optical signal.
7 more elements
Dependencies are inferred from the claim text.