An Efficient Retransmission Scheme for Wireless Home Networks

This paper proposes an efficient retransmission (EFR) scheme for multi-rate wireless home networks. In EFR, immediate data transmission is provided for infrastructure WLAN without major modification of IEEE 802.11 standard. Furthermore, in order to consider a more realistic wireless home networks, the EFR scheme is enhanced to accommodate the asymmetric traffic model. We propose an analytical model and a simulation model to investigate the performance of EFR and Enhanced EFR. Our study indicates that in terms of average MAC delay, average queuing delay, completion rate, average collision times and goodput, EFR and Enhanced EFR outperform standard IEEE 802.11 carrier sense multiple access/collision avoidance mechanism.