Abstract: The authors analyze the cause of gray zone and its influence over network performance. A modeling method of gray zone based on NS2 simulation platformis proposed. Compared to traditional models, its simulation results are more close to real scene. This model reflects the gray zone problemin real Ad-Hoc network and provides a model support on NS2 simulation platform for link failure detection algorithm and routing selection algorithmof Ad-Hoc network.

Key words: Ad-Hoc network, AODV, gray zone, NS2 simulation, IEEE 802.11b

摘要： 针对灰色区域问题, 分析其产生的原因及其对网络性能的影响, 并提出一种灰色区域模型的建模方法。与传统的仿真研究采用的模型相比, 采用灰色区域模型构造的无线自组织网络, 其仿真结果更接近于实际场景。本模型可在一定程度上反映无线 自组织网络路由协议在现实组网环境中可能出现的灰色区域问题, 对路由协议的链路失效检测算法以及路由选择算法的改进提供NS2仿真平台模型的支持。

关键词: 无线自组织网络, AODV, 灰色区域, NS2仿真, IEEE802.11b