基于风能传感器网络中的传输功率控制

Energy Level Based Transmission Power Control Scheme for Energy Harvesting WSNs

传感器网络利用风力发电、超级电容储能,通过分析电源的充电、漏电和节点的能量消耗情况,提出一种新的基于能量等级的传输功率控制策略,EL-TPC。在EL-TPC中,传输功率被分为3种模式,通过调整节点的工作模式,形成分层的网络架构,优先使用储能较多、充电快速和存在漏电的节点,最大限度延长网络的工作时长。结果表明,EL-TPC可以显著延长整个网络的工作寿命。

A sensor network system which uses wind power as energy harvesting resource and ultra-capacitor as energy storage. By analyzing the power recharging, leakage and energy consumption rate, a novel energy level based transmission power control scheme （EL-TPC） is produced. In EL-TPC scheme, the transmission power is classified into three levels which correspond to specified communication requirements. By adapting the nodes＇ operation pattern, hierarchical network architecture can be formed, which prioritizes the use of high energy level, fast charging and leaking nodes to save the energy of uncharged nodes. The scheme is implemen- ted in a building surface mounted, wind power collected wireless sensor network system called BSWPWSN, which aims to monitoring the usage pattern of air conditioners and the outdoor temperature. The results show that EL-TPC scheme can significantly extend the entire network lifetime.