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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 significant impacts on the credibility of the simulation results.Based on the core feature of links obtained from the recent empirical studies,a realistic link model,named RLINK,was proposed for a more credible simulation of wireless sensor networks （WSNs）.RLINK captured the essential non-isotropic feature of the wireless links in WSNs by modeling three main causes： variance of path loss due to shadowing effect,difference in hardware calibration and radio directionality.The accuracy of RLINK model was verified by the high agreement of the statistical results obtained from simulations with those obtained from experiments,in terms of cumulative distribution of link asymmetry and arithmetic average of link asymmetry.