Abstract: In a satellite communication system to perform routing with a communication channel via a satellite, when an earth station is to enter the satellite communication system, a control station notifies the earth station, using a control channel via the satellite, of the network address of the earth station managed by the control station. After that, the earth station can establish the communication channel via the satellite.

Abstract: One earth station transmits an address of a source to another earth station (or HUB station), and the other earth station (or HUB station) stores the address in an address management table in association with the one earth station that has transmitted the address of the source and reads, from destination packet data that is packet data including an address of a destination, the address of the destination, and the other earth station (or HUB station) transmits the destination packet data to the associated earth station with reference to the address management table.

Abstract: One earth station transmits an address of a source to another earth station (or HUB station), and the other earth station (or HUB station) stores the address in an address management table in association with the one earth station that has transmitted the address of the source and reads, from destination packet data that is packet data including an address of a destination, the address of the destination, and the other earth station (or HUB station) transmits the destination packet data to the associated earth station with reference to the address management table.

Abstract: Delivery destination designation information, pertaining to a multicast address to which per-multicast-address delivery is requested by a communication terminal connected to a receiving station, is transmitted from the receiving station to a transmitting station, the transmitting station generates a multicast delivery destination table, in which a multicast address to which the delivery is requested from the communication terminal is associated to the communication terminal, from the delivery destination designation information received from a plurality receiving stations, and the transmitting station refers to the multicast delivery destination table when performing multicast transmission via a satellite.

Abstract: In a satellite communication system to perform routing with a communication channel via a satellite, when an earth station is to enter the satellite communication system, a control station notifies the earth station, using a control channel via the satellite, of the network address of the earth station managed by the control station. After that, the earth station can establish the communication channel via the satellite.