Lifetime maximization for amplify-and-forward cooperative networks
IEEE Transactions on Wireless Communications - Part 2
Cooperative diversity in wireless networks: Efficient protocols and outage behavior
IEEE Transactions on Information Theory
Cooperative communication in wireless networks
IEEE Communications Magazine
Lifetime maximization via cooperative nodes and relay deployment in wireless networks
IEEE Journal on Selected Areas in Communications
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Hybrid relay systems using an amplify and forward (AF) protocol and a decode and forward (DF) protocol together are introduced in cooperative networks. For this hybrid system with a power constraint, we propose an adaptive relay selection algorithm to extend the network lifetime while avoiding the degradation of the received signal to noise ratio (SNR) at the destination. In the adaptive relay selection algorithm, two relays are selected among many as the channel state information (CSI) and the residual power of each relay are considered. One is chosen to operate in the AF protocol, and the other is in the DF protocol. Simulation results show that the proposed algorithm achieves better performance than those of conventional methods.