Passive optical network system and ranging method

Details Passive optical network system and ranging method Passive optical network system and ranging method

2011-06-07

2011-06-07

Bello, Agustin (Department: 2613)

Optical communications

Multiplex

Hybrid

C398S072000, C398S071000, C398S070000

Reexamination Certificate

active

07957647

ABSTRACT:
In a WDM-PON system wherein a plurality of ONUs transfer signals by sharing wavelengths, one wavelength dedicated to a ranging procedure is set, and the ranging is performed with only the dedicated wavelength, so as to measure reciprocating delay times. At the other wavelengths, transmission signals from a plurality of ONUs are transferred in time division multiplexing based on the obtained reciprocating delay times. An OLT includes a burst receiver circuit for only the wavelength dedicated to the ranging, and subsequently to the ranging, the OLT adjusts transmission amplitudes and transmission phases for the ONUs, so as to equalize received amplitudes and received phases in the OLT. For this purpose, the OLT includes means for measuring the amplitudes and phases of received signals, as the burst receiver circuit, and it includes a table for managing the received amplitudes and received phases of the respective ONUs.

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