COMMUNICATION SYSTEM, CONTROL APPARATUS, COMMUNICATION CONTROL METHOD, TRANSFER CONTROL METHOD, AND TRANSFER CONTROL PROGRAM

摘要

A communication system, in which a plurality of communication terminals communicate with one another via a network, comprises: a control apparatus (4) that controls packet transfers using the network; and a proxy server (3) that receives a multicast packet transmitted from a communication terminal and transmits a unicast packet to each of the communication terminals belonging to a group corresponding to the multicast packet. The control apparatus (4) controls the packet transfers, which use the network, such that the multicast packets transmitted by the communication terminals are transferred to the proxy server (3).