MULTICAST SYSTEM, MULTICAST TREE CONSTITUTION METHOD, AND COMPUTER PROGRAM

摘要

Disclosed is a multicast system for distributing data in a logical network comprising a plurality of nodes including a first node as constituent elements; wherein the first node comprises a first constitution unit for constituting a first multicast tree comprising nodes for receiving only data transmitted by a first distribution source; a second constitution unit for constituting a second multicast tree comprising nodes for receiving only data transmitted by a second distribution source; a third constitution unit for constituting a third multicast tree comprising nodes for receiving data transmitted by both the first and the second distribution sources; and an integration unit for connecting the first multicast tree to a first leaf of the third multicast tree and connecting the second multicast tree to a second leaf of the third multicast tree, thereby generating an integrated multicast tree.