无线传感器网络节点能量平衡优化方法

在无线传感器网络中，传感器节点中有限的能量供给限制了每个节点无线传输的距离。多跳传输通过将数据包转发给中继节点的方式可将数据包发送至远端接收器。在用于数据汇聚的无线传感器网络中，离数据汇聚站较近的无线传感器节点通常要转发比其他节点更多的数据包，从而消耗更多的能量。文章将整个网络的生命定义为直到第一个无线传感器节点能量耗尽从而失效的时间。提出一种基于无线传感器网络的能量平衡优化方案，该方案所采用的能量模型是基于对ChipconCC2420无线传感器射频收发器的测量数据推导得出的。根据这个方案，通过优化网络中数据流转发的分布来平衡节点的能量消耗。从而延长整个网络的使用生命。

Node Energy-balancing Optimization Method in Wireless Sensor Network

In wireless sensor networks （WSNs）, energy limitation of the battery in a sensor node restricts its transmission distance. Fortunately, multi-hop transmission enables the sensor node to send its packets to the remote destination by forwarding the packets to other intermediate nodes hop by hop. In the WSN used for data aggregation, nodes which are adjacent to the data sink typically forward larger amount of traffic and deplete their battery faster than the other nodes. Defining the lifetime of a WSN as the time that first out-of-energy node is tbund since the WSN starts, this paper propose an energy balanced optimization scheme for two-dimensional WSNs based on tile realistic energy model derived from measured data on Chipcon CC2420. According to the scheme, the optimal traffic flow distribution can balance the energy consumptions of nodes, and then the lifetime of WSN is extended.