Patent ID: 9225424
Filing Date: 2015-12-29
Classification: H04B,H04J,H04Q

Abstract:
1. An OLT communicable with a plurality of ONUs, comprising: a modulation-scheme variable burst-mode optical transmitter/receiver arranged to support a plurality of kinds of modulation schemes and connected to an optical fiber between the plurality of ONUs and the OLT; a PHY/MAC (Physical/Media Access Control) processor connected to the modulation-scheme variable burst-mode optical transmitter/receiver; an NNI (Network-Network Interface) processor connected to the PHY/MAC processor; an MPCP (Multi-Point Control Protocol) controller arranged to control the PHY/MAC processor; a modulation scheme controller arranged to control the modulation-scheme variable burst-mode optical transmitter/receiver; and an ONU modulation scheme management table arranged to store modulation schemes used by the plurality of ONUs, wherein the MPCP controller allocates bandwidths for uplink signals from the plurality of ONUs to the plurality of ONUs, respectively.