基于网络编码和占空比的无线传感器网络节能方案

提出一种结合随机网络编码和占空比的无线传感器网络节能方案（RNC_DCES）. 该方案根据所接收数据标识信息决定节点处于工作状态或睡眠状态，以避免数据重复接收，并通过结合随机网络编码，增加相同传输次数下的数据信息量，从而实现节能. 通过理论计算分析了RNC_DCES方案所构建传输模型下的网络能耗最大值，并验证了多跳网络能耗的最优解. 实验结果表明，对比联合随机占空比网络编码（RDCNCode）算法和改进型自适应网络编码（AdapCode++）算法，RNC_DCES延长了网络生命周期4.02%和8.51%，提升了包投递率14.83%和4.65%，从而有效提升了数据包投递率和网络能量效率.

An Energy-saving Scheme for Wireless Sensor Networks based on Network Coding and Duty-Cycle

An energy-saving scheme for wireless sensor networks based on network coding and duty-cycle (NCDES) was proposed. The scheme determines the node's status based on the ID information which embedded in data information. When combining network coding and duty-cycle in wireless sensor networks, it will reduce transmission coding coefficients and retransmissions. The energy efficiency of the network increases as more volume of data will be transmitted to the sink with same number of transmissions. The optimal value of energy consumption for the multi-hop network was proved by analyzing the network topology and energy model. In contrast to RDCNCode and AdapCode++, the simulation shows that NCDES has a great improvement on data delivery ratio and energy efficiency, it extends the network lifetime about 4.02% and 8.51%, and improves the packet delivery rate about 14.83% and 4.65%.