This paper investigates performance of multi-hop underwater acoustic sensor networks when they deploy routing algorithms combining with cooperative communication. Taking into account energy efficiency, the routing schemes are discriminated by different policies of selecting next hop nodes as well as relay nodes of one-hop cooperative communications such that the transmission energy of routing paths is minimized. In order to take full advantage of broadcast nature in wireless communication, we propose to use a node exploited as a joint relay for two-hop cooperative communication. Simulation results show that under specific conditions of acoustic channel, the network employing the proposed scheme achieves higher energy efficiency and balance of energy consumption among nodes while guaranteeing the desired data rate.
Submission date: 2017.10.12