Patent 7369553 was granted and assigned to Juniper Networks on May, 2008 by the United States Patent and Trademark Office.
A unicast/multicast system has an internal cell generating section that generates an internal cell to include its output index information based on user data, and an output port conversion table that stores the relation of output index information and output port number for the internal cell in the form of one-to-one for the unicast and one-to-multiple for the multicast.