Network coding-based retransmission schemes for 4G multicast/broadcast networks with shared feedback channel

In this work we design retransmission schemes for broadcast networks which use simple network coding techniques. In particular we consider a wireless system with a shared feedback channel, wherein the number of transmission errors can be estimated by polling or voice-vote mechanisms. As a result, the feedback bandwidth is independent of the users in the system. We then develop analytical models to characterize error correction and employ these results to design efficient retransmission algorithms. We compare their performance with two baseline schemes.