The IP multicasting system and the mannered null backbone network which utilize

摘要

This invention constructs IP multiple cast network at Internet net node unit which has the regional node of ISP, namely Luther or the switch for member connection, discloses the IP multicasting system and the method of utilizing the satellite which transmits the multicasting packet which is transmitted from contents contributor side to local IP multiple cast network via the satellite. In Luther and member Luther 630,650 where this invention the backbone net 200 of ISP, satellite 400 by way of, transmits the contents which are offered from contents offer expedient 100a, 100b and the aforementioned contents offer expedient which offer the multimedia contents, the satellite net 300,500 which offers the contents with the multiple cast packet, is linked with the aforementioned backbone net, sets the aforementioned multiple cast packet with Luther or the switch as appropriate multicasting protocol, the Ethernet (registered trade mark) through from satellite data receiver 520, is connected Luther's port which the output port and the aforementioned satellite data receiver of static multicasting routing setting or satellite data receiver 520 is connectedAmong IP head contents of the multiple cast packet, ribasupasuhuowadeingu is done with the method of appointing IP of the subnetwork which is identical with source address, the local network 600 which transmits the aforementioned multiple cast packet to the member terminal 635,645 which is the terminal client is had.