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在网络仿真中,链路模型的精确性对仿真结果的真实性有着重要影响。基于在无线传感器网络实验中观察到的链路的核心特殊性质——不等向连通性,提出了一个真实的链路仿真模型RLINK.通过对不等向连通性的三个因素进行分析建模,即由遮蔽效应引起的路径衰减的差异、节点硬件的校准差异和天线的方向性差异,该模型实现了无线传感器网络链路的精确模拟。以链路不对称性的累积分布和算数平均值为指标,对比实验和仿真中获得的有关链路特性的统计数据,两者的一致性验证了RLINK的精确性。
In network simulation, the accuracy of the link model has an important impact on the authenticity of the simulation results. Based on the core special property of link observed in wireless sensor network experiments - the non-directional connectivity, a real link simulation model RLINK is proposed. By analyzing the three factors of the non-uniform connectivity , Which is the difference of path attenuation caused by the shadowing effect, the difference of the hardware calibration of the nodes and the directivity of the antenna, the model realizes the accurate simulation of the link of the wireless sensor network. Taking the cumulative distribution of the link asymmetry and the arithmetic average as an index, the statistics of the link characteristics obtained in the experiments and simulations are compared, and the consistency of the two verifies the accuracy of the RLINK.