Passive optical network system and wavelength assignment method

Details Passive optical network system and wavelength assignment method Passive optical network system and wavelength assignment method

2011-01-18

2011-01-18

Vanderpuye, Ken N (Department: 2613)

Optical communications

Multiplex

Broadcast and distribution system

C398S069000, C398S072000

Reexamination Certificate

active

07873277

ABSTRACT:
In a PON system with WDM, at the time of initial setting, each ONU negotiates with an OLT, and automatically acquires a wavelength which can be used by the ONU. One wavelength for negotiation of assigned wavelength is fixed as a default, and a newly connected ONU first uses the wavelength. The OLT200includes a plurality of light sources for downstream communication. The ONU300includes a wavelength variable filter selectively receiving one of wavelengths of downstream communication, and a wavelength variable light source selectively emitting light of one of plural wavelengths for upstream communication. The ONU300uses a transmission wavelength (for example, λu32) for negotiation and transmits a wavelength assignment request1000to the OLT200. The OLT200selects a wavelength λu1to be assigned from unused wavelengths, and transmits wavelength information to the ONU300. The OLT200and the ONU300communicates using the notified wavelengths.

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