Patent ID: 8180223
Filing Date: 2012-05-15
Classification: H04J,H04Q

Abstract:
1. A system for extending reach in a passive optical network (PON), comprising: a transmitter at a first optical network unit (ONU) in the PON configured to transmit upstream traffic at a first wavelength in a first time period; a transmitter at a second ONU in the PON configured to transmit upstream traffic at a second wavelength in a second time period; a transmitter at a third ONU in the PON configured to transmit upstream traffic at the first wavelength in a third time period; a transmitter at a fourth ONU in the PON configured to transmit upstream traffic at the second wavelength in a fourth time period, wherein only the traffic in the first wavelength is transmitted in the first time period, only the traffic in the second wavelength is transmitted in the second time period, only the traffic in the first wavelength is transmitted in the third time period, and only the traffic in the second wavelength is transmitted in the fourth time period; wherein the first time period, the second time period, the third time period, and the fourth time period occur at different times and do not overlap in time; a multiplexer at a distribution node in the PON comprising a first input port and a second input port and configured to: receive the traffic in the first wavelength at the first input port; receive the traffic in the second wavelength at the second input port; and forward the traffic in the first wavelength and the traffic in the second wavelength to an optical line terminal (OLT); and a single receiver at the OLT configured to receive the traffic in the first wavelength and the traffic in the second wavelength.