关键词: 无线传感器网络, 组网方法, 网络部署成本, 网络寿命

Abstract:

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 operation scheme is put forward to prolong the network lifetime and decrease the number of nodes. An accurate 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 frequency shift keying is introduced, and the constellation size is optimized for node energy efficiency. Furthermore, non-uniform deployment with varied number of nodes in different layer is considered for network energy balance. Simulation shows that the proposed method requires less number of nodes for the network deployment and achieves longer network lifetime at meantime.

Key words: wireless sensor networks, network deployment method, the cost of network deployment, network lifetime