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Method and system for automatic topology discovery in wavelength division multiplexing (WDM) network

  • US 9,100,138 B2
  • Filed: 10/14/2013
  • Issued: 08/04/2015
  • Est. Priority Date: 10/14/2013
  • Status: Expired due to Fees
First Claim
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1. A method for automatic topology discovery implemented in a wavelength division multiplexing (WDM) network, wherein the WDM network contains a plurality of wavelength switching devices, the method comprising:

  • selecting an unassigned wavelength between a pair of wavelength switching devices of the plurality of wavelength switching devices;

    for a first port of a first wavelength switching device of the pair of wavelength switching devices,configuring a pass through state between the first port and a coupling port of the first wavelength switching device, wherein the coupling port coupled to a control node aggregating traffic of the first wavelength switching device;

    sending a first probing signal at the unassigned wavelength to the first wavelength switching device;

    detecting iteratively the first probing signal at the unassigned wavelength through each of a set of ports of a second wavelength switching device of the pair of wavelength switching devices during a first time period, wherein a pass through state is configured iteratively between each port of the set of ports of the second wavelength switching device and a coupling port of the second wavelength switching device; and

    recording a connection between the first port of the first wavelength switching device and a port of the second wavelength switching device when the first probing signal is detected at the unassigned wavelength at the port of the second wavelength switching device.

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