Patent ID: 9008512
Filing Date: 2015-04-14
Classification: H04B,H04J,H04L

Abstract:
1. An Optical Network Unit (ONU), comprising: An interface for receiving a pilot signal and downstream information signals; Wherein the pilot signal is received at a pilot frequency slot and the downstream information signals are received at a downstream information frequency slot; Wherein the ONU is allocated with a spectral slice that comprises the pilot frequency slot, the downstream information frequency slot, a guard frequency slot and an upstream information frequency slot; Wherein at least one other spectral slice is allocated for exchanging information with at least one other group of ONUs; At least one splitting circuit for splitting the downstream information signals and the pilot signal to portions of downstream information signals and pilot signals; A detection circuit for detecting downstream information, in response to at least a first portion of downstream information signals; a modulator for modulating upstream information signals by (i) a portion of the pilot signal, and (ii) a second portion of the downstream information signals to provide (a) upstream information signals that are within the upstream information frequency slot, and (b) upstream secondary signals that are outside the pilot frequency slot, the downstream information frequency slot and the upstream information frequency slot; and a transmitter circuit for upstream transmitting the upstream information signals and the upstream secondary signals.