METHOD FOR ANALOG NETWORK CODING-BASED SATELLITE COMMUNICATION AND APPARATUS FOR SAME

摘要

Disclosed are a method for an analog network coding-based satellite communication and an apparatus for same. A method for satellite communication, according to one embodiment of the present invention, is a method for satellite communication of a satellite terminal and comprises the steps of: receiving transmission data from a feeder for directly transmitting transmission data to a satellite; receiving from the satellite a superpositioned signal of which the transmission data and reception data, which corresponds to the transmission data, are analog network-coded; and extracting from the superpositioned signal the reception data by using the superpositioned signal and the transmission data that is received; wherein in a step for receiving from the feeder, the transmission data is received from an all-direction antenna that is provided on the feeder or received from the feeder through a predetermined different network which is connected with a wire or wirelessly to the feeder, thereby enabling a many-to-many satellite communication using the analog network coding method and thus improving frequency efficiency. Also, a method for satellite communication using a data security signal, according to another embodiment of the present invention, comprises the steps of: receiving a security key from a security center within a satellite network and sharing the security key with the security center; receiving from the satellite a superpositioned signal, in which transmission data that is transmitted from a base station within the satellite network or a first satellite terminal by passing through an uplink and the security key that is transmitted from the security center by passing through an uplink are analog network-coded; and extracting reception data that corresponds to the transmission data from the superpositioned signal by using the security key that is shared, thereby enabling protection of secret information even during many-to-many communication by using network coding.