无线传感器网络节能优化组网方法

An Energy Efficient Network Deployment for WSNs

对无线传感器网络进行有效的组网设计和部署是决定其生存寿命、降低网络成本的首要和关键步骤,对此,在引入非线性电池能耗模型评估节点能耗的基础上,结合网络非均匀部署策略、时分多址技术以及节能优化的正交频移键控数据调制技术,提出了一种基于节点轮流工作机制的新颖组网方法.仿真结果表明,该组网方法不仅可以减少网络部署所需的节点数,降低部署成本,同时还可提高能量利用效率,延长网络的工作寿命.

In wireless sensor networks （WSNs） , the effective network organization and nodes deployment are essential to the network lifetime and the budget. A new network deployment with node alternate oper- ation scheme is put forward to prolong the network lifetime and decrease the number of nodes. An accu- rate analytical non-linear battery model is presented for evaluating the energy consumption of nodes. Time division multiple address is applied for data transmission and reception between the nodes. Optical fre- quency shift keying is introduced, and the constellation size is optimized for node energy efficiency. Fur- thermore, non-uniform deployment with varied number of nodes in different layer is considered for net- work energy balance. Simulation shows that the proposed method requires less number of nodes for the network deployment and achieves longer network lifetime at meantime.