Network-Coding-Based Broadcasting Retransmission Approach in Satellite Communications

Abstract

In satellite communications, it is often necessary to broadcast large data to terrestrial users. Because the satellite channel is a typical fading channel, packets can’t be correctly received. Therefore, retransmission is necessary. This paper proposes a network-coding-based broadcasting retransmission approach, whose key idea is to combine different lost packets with network coding to achieve minimum number of retransmission. Simulation results indicate that compared with existing approaches, network-coding-based broadcasting retransmission approach can effectively reduce average number of transmissions.