一种周期性无线传感器网络的跨层优化模型

Cross layer optimization based periodic wireless sensor network model

基于跨层优化协议,提出了一种跨层优化模型。首先基于跨层优化协议的能量效率树与调度器,根据不同目标建立了三个目标成本函数;然后,为能量效率树与调度器设计了一系列合理的限制条件,并设计了网络数据传输延迟的上、下界来提高最优解的求解速度;最终,利用求解软件获得网络生命期的最优解,同时降低了网络数据传输的延迟。仿真试验结果证明,与原跨层优化协议相比,本算法提高了网络生命期、吞吐量,并降低了传感网络中数据传输的延迟。

Based on the cross layer optimization protocol, a new model is proposed. Firstly, based on the energy efficient tree and the schedule program of the protocol, three target cost functions are setup according to the different targets. Then, a series of reasonable constraint are designed for the energy efficient tree and the schedule program, and the constrain conditions for upper bound and lower bound to increase the speed. Lastly, with the solution software, the optimal lifetime is computed and the delay of the data transfer is reduced. Experiments result prove that, compared with the protocol, the proposed model improves the network lifetime and throughput, and reduces the data transfer delay.