Joint Optimization of Packet Length and Transmission Energy in Amplify-and-Forward Relay Networks

In this paper, we investigate the joint optimization of packet length and transmission energy for minimizing the total energy consumption per transferred payload bit in amplify-and-forward relay networks. Analytical expression of the total energy consumption per transferred payload bit is derived. The relay transmission is optimized to minimize the total energy consumption with respect to the packet length and the transmission energy. By simulation, we compare the relay transmission with the direct transmission in terms of the total energy consumption per transferred payload bit. Our results provide several insights into the choice of transmission strategies (relay transmission or direct transmission) given some network parameters.