Patent ID: 8824894
Filing Date: 2014-09-02
Classification: H04J,H04Q

Abstract:
1. A communication system comprising: a plurality of optical network units, and an optical line terminal connected to the optical network units through optical fibers, wherein the optical line terminal measures communication distances to the optical network units, holds measurement results, adjusts a light intensity of a downstream communication signal to each of the optical network units on the basis of the measurement results, and notifies the optical network units of a transmission schedule of the downstream communication signal prior to transmission of the downstream communication signal, each of the optical network units receives only an optical signal of the subject optical network unit on the basis of the received transmission schedule, and discards or blocks optical signals addressed to other optical network units, and the optical line terminal has a function of transmitting arrival timing information in a given period, in transmitting a signal having the arrival timing information, about the light intensity of the downstream communication signal addressed to the respective optical network units to the respective optical network units in advance, prior to processing of transmitting the downstream communication signal to the respective optical network units.