Patent ID: 6895006
Filing Date: 2005-05-17
Classification: H04L

Abstract:
1. A unicast/multicast system, comprising: an internal cell generating section that generates an internal cell based on user data; an internal cell receiving section that outputs the internal cell to a timing generating section and outputs a header field of the internal cell to an index search section; an output port conversion table that stores the relation of output index information and output port number in the form of one-to-one for the unicast and one-to-multiple for the multicast; said index search section that extracts output index information from the header field to be sent from said internal cell receiving section, refers to said output port conversion table for an output port number corresponding to the output index information extracted, and outputs the output port number obtained from said output port conversion table to a destination-based distribution section; said destination-based distribution section that controls a gate section based on the output port number input from said index search section; a timing generating section that delays the internal cell input from said internal cell receiving section and then outputs it said gate section; said gate section that distributes the internal cell input from said timing generating section to said gate section according to the control of said destination-based distribution section; a plurality of buffers that each store the internal cell distributed from said gate section and, when receiving the internal cell distributed from said gate section, sends switching request signal to a switching request adjusting section; said switching request adjusting section that adjusts the switching request signal input from said buffers between said buffers and determines a route in a crosspoint switch; and said crosspoint switch that outputs the internal cell stored in said buffers through the route determined by said switching request adjusting section.