Patent ID: 7113665
Filing Date: 2006-09-26
Classification: H04Q

Abstract:
1. An optical router which is disposed on an optical node basis, selects optical paths for optical signals that are transmitted through such optical transmission lines as optical fibers, and outputs said optical signals through said optical paths, whereby an optical communications network is formed, said optical router comprising: optical delay means for delaying a plurality of said optical signals containing routing information attached to the header parts thereof by an optical signal delay time; an optical switch provided with a plurality of input ports whereto a plurality of optical outputs of said optical delay means are input and with a plurality of output ports wherefrom said optical signals are output; an optical-electrical converter for converting a plurality of said optical signals to electrical signals; memory wherein path control information and delay time information are stored; and a controller for generating an electrical routing control signal whereby to change the optical paths of said optical signals by finding said path control information according to said routing information extracted from the output of said optical-electrical converter and for delaying said electrical routing control signal by an electrical signal delay time determined according to said delay time information before outputting said electrical routing control signal to said optical switch.