中文摘要：

能耗问题是无线传感器网络研究中的热点。本文运用网络演算理论的到达曲线和离开曲线刻画无线传感器网络中流量的到达过程和离开过程，建立传感器能耗模型，给出模型约束条件，并分析模型中信噪比的作用。通过引入离开曲线和最佳离开曲线，得出离开速率与信噪比的关系。在此基础上研究和计算在特定状态下传感器网络最佳能耗，推导出最佳能耗公式。通过仿真验证了最佳能耗情况下速度与距离关系等相应结论。

英文摘要：

Energy consumption is a hot topic in wireless sensor networks. This paper describes the arrival process and departure process of traffic for wireless sensor networks based on network calculus and constructs energy consumption mode, gives constraint of model and analyzes the effect of SNR in the model. By introducing depart curve and optimal depart curve, the paper obtains the relationship of depart rate and SNR. Based on this, it studies and calculates the optimal energy consumption of the sensor network in a particular state, deduces the optimum energy consumption formula. Optimal energy efficiency condition is verified by the sim- ulation depart rate and distance relationship etc. corresponding conclusions.