基于跨层网络演算模型的无线网络移动性能分析

Mobility Analysis in Wireless Networks Based on a Cross-layer Network Calculus Model

为了研究终端移动对无线网络服务质量(QoS)的影响,该文建立了跨层网络演算模型来计算通信终端处于不同移动速度下无线网络的延时积压性能参数。该模型的建立结合了跨层分析思想和网络演算理论,将无线网络中网络层、链路层及物理层等层次的特性映射为一系列网络演算模块的串联。基于构造的模型应用网络演算能够方便地推导出终端处于不同移动速度下无线网络的服务曲线,进而计算出网络的延时积压性能。仿真结果表明,构造的跨层网络演算模型可以准确地分析终端在不同移动速度下无线网络的延时积压性能。

In order to study the effect of terminal moving on QoS in wireless networks,a cross-layer network calculus model is established to calculate the delay and backlog performance parameters when communication terminals are under different moving speeds.This model combines the idea of cross-layer analysis and network calculus theory,which mapping the different characteristic of network layer,link layer and physical layer into a series of network calculus components.Based on the cross-layer network calculus model,the corresponding service curve can be derived conveniently when moving terminals are under different moving speeds using network calculus theory,in addition,the backlog and delay performance parameters can be calculated.Simulation results veried that the established cross-layer network calculus model can analysis the backlog and delay performance in wireless networks under different terminal moving speeds.