In traditional automatic retransmission request (ARQ) based wireless broadcasting (WBC) systems, one lost packet is retransmitted per slot to guarantee the correct reception of each packet, which leads to low spectrum efficiency. In this paper, we propose an Ave-Max-Min Network Coding (NC) based WBC protocol. Specifically, to reduce the overall number of retransmissions, lost packets of different user equipments (UEs) are combined by performing Ave-Max-Min NC at the base station. Then, NC combined packets are broadcasted to all the UEs. At each UE, lost packets can be recovered by using the proposed joint network recursive systematic convolution (RSC) decoder (JNRD). Theoretical analyses and simulation results show that the proposed Ave-Max-Min NC based WBC protocol outperforms traditional NC based WBC protocol on the average number of transmissions performance.
['Hui Tian', 'Kui Xu', 'Xiaoming Chen', 'Wei Xie', 'Wenfeng Ma', 'Youyun Xu']
Ave-Max-Min Network Coding for Wireless Data Broadcasting