基于IEEE 802.11的无线多跳网络路径容量分析模型

Modeling path capacity in IEEE 802.11-based multi-hop networks

旨在建立一个适用于无线多跳路径性能研究的闭合分析模型。首先对导致多跳路径中流内竞争现象的干扰问题进行了详细分析并给出了定量计算方法,然后通过将多跳路径建模为排队网络,利用扩散近似法建立了路径性能分析模型,最后在网络稳定性约束条件下对多跳路径的容量问题进行了研究。利用该模型可以在无线多跳网络中分析网络传输的吞吐能力,同时有助于研究网络对QoS业务的支持能力。通过仿真实验结果与数值分析结果的对比,验证了分析模型的准确性。

A closed analytical model is developed for the performance analysis of wireless multi-hop path.The research first analyzed the interference within the multi-hop path which is the cause of the intra-flow contention problem and derived the model for its quantitative calculation,and then it modeled the multi-hop path as a queuing network and derived its analytical model for performance analysis based on diffusion approximation method.Finally it calculated the capacity of the multi-hop path under the constraint of network stability.This model can be used to explore the transmission capacity of the multi-hop wireless networks and to analyze its ability to support QoS applications.The accuracy of the proposed model is validated through comparing the numerical results and the simulation results.