A Novel Cross-layer Design Scheme for Distributed Cooperative Communication Networks
Yue Dian-wu · Dianzi xuebao · 2009
This paper proposes a novel cross-layer design scheme,named selective-node-based retransmission scheme(SN-RT).It efficiently combines cooperative diversity at the physical layer and automatic repeat request(ARQ) at the data link layer.At the stage of retransmission,the source together with an optimal relay,which is selected based on the instantaneous signal-to-noise ratio of relay-to-destination link,transmit signals to the destination node by following Alamouti-based space-time coding.The explicit expressions of throughput with MPSK modulation over Rayleigh fading channels are derived.The simulation results show that compared to the fixed-node-based retransmission scheme(FN-RT),SN-RT scheme can notably improve system throughput.