协作多跳水声网络能量最小路径研究

Minimum energy routing for cooperative multihop underwater acoustic networks

研究在给定接收信噪比条件下协作多跳水声网络能量最小路径问题.考虑一个二维协作多跳网络模型,源节点和目的节点通过任意分布的中继节点及其附近的协作节点进行数据通信.建立了该网络的能量模型,并通过最优频率-距离关系的近似表达简化能量模型;在此基础上分析了可变发送功率模式下的能量最小路径,对节点间距和协作节点数量进行联合优化,从理论上证明了当各中继节点选取相同数量的协作节点,且中继节点按直线等距路径分布时网络总能耗最小,并给出了直线等距网络最优节点间距和最优协作节点数量的求解方法.仿真结果验证了该理论的正确性.

The optimal routing paths that minimize the total energy consumption for a given target signal-to-noise ratio（SNR） for cooperative multihop underwater acoustic networks are considered.A two dimensional cooperative multihop network is considered,where a pair of source and destination terminals communicate with each other by routing their data through intermediate relay terminals and their nearby cooperative nodes,with the relay arbitrarily spaced between the source-destination pair.A network energy model is established and simplified by an empirical closed-form expression of the optimal frequency-distance relationship.The energy efficient routing paths for variable transmission power schemes are investigated,with joint optimization of the internode distance and the number of cooperative nodes.It is theoretically proved that the total energy consumption of the network is minimized only if all the hop distances as well as the number of cooperative nodes are equal for a linear multihop network.In the case of equispaced relays,the analytical results on the optimal number of hops and the optimal distance that minimize the total energy consumption are also provided.Simulation results verify the correctness of this theory.