Patent ID: 7272318
Filing Date: 2007-09-18
Classification: H04J,H04L

Abstract:
1. A passive optical network (PON) employing a multi-carrier CDMA, comprising: a plurality of optical network terminals (ONTs) configured to receive an Ethernet signal from an outer lower interface device, to transmit CDMA-based signals to an optical line terminal (OLT) using multiple carriers and to receive an Ethernet-based signal transmitted from the OLT; the OLT configured to transform each CDMA-based signal received from the respective ONT into a transformed Ethernet-based signal, to transmit the transformed Ethernet-based signal to a higher network, and to transmit the Ethernet-based signal to the ONTs; and an optical coupler configured to couple the CDMA-based signals transmitted from the plurality of ONTs, to transmit the coupled CDMA-based signals to the OLT, and to distribute the Ethernet-based signal transmitted from the OLT to the plurality of ONTs, wherein each ONT comprises a level transformer configured to transform a 100 Mbps Ethernet signal received from the outer lower interface device into a level-transformed signal with predetermined data level values; a first multiplexer being configured to branch the level-transformed signal into branched signal; and a first multiplier configured to multiply each one of the branched signals with a CDMA code assigned to one of the ONTs and to output multiplied, branched signals.