基于剩余能量的多源无线协作网络中继选择策略设计

在多源多中继协作无线传感网中,单纯基于链路质量的中继选择策略往往会使最佳中继的能量被快速消耗完,造成节点能量消耗的不公平和整个网络寿命的减少。因此,提出了一种基于剩余能量的中继选择策略,重新定义了一个理论有效转发信息包数与中继剩余能量的内积,并以最大化该内积数值作为中继最优的选择标准。仿真结果表明提出的策略能有效平衡网络中各中继节点的剩余能量,以损失平均吞吐量10%左右为代价,换来网络总吞吐量的提升和平均网络寿命延长一倍左右。

Relay Selection Strategy Design Based on Residual Energy for Multi-Source Wireless Cooperative Networks

In multi-source multi-relay wireless cooperative sensor networks, the relay selection strategy based solely on the link quality usually leads to rapid exhaustion of the optimal relay energy resulting in inequality of node energy consumption and reduction of the entire network lifetime. Therefore, a selection strategy based on relaying residual energy is proposed. This strategy defines the inner product of the number of theoretically effective forwarding packets and the relaying residual energy. The selection criterion is to maximize the inner product. According to the simulation results, the proposed strategy can effectively balance the remaining energy of each relay node in the network, improve the total network throughput and extend the average network lifetime by about once at the cost about 10% of the average throughput.