大规模WiFi-based无线网络的模拟：跨学科的挑战和应用
Simulations of Large-scale WiFi-based Wireless Networks: Interdisciplinary Challenges and Applications
摘要：
无线保真（WiFi）是迄今为止发展最快的无线技术。除了提供无线连接到互联网，WiFi技术还使移动设备能够直接相互连接，形成高度动态的无线自组织网络。这种分布式网络可以用于在没有固定基础设施的情况下执行协作通信任务，例如广告数据路由和信息传播。此外，由无线联网的便携式设备组成的adhoc网格正在成为网格计算中的一个新范例。在本文中，我们审查的高保真度模拟的计算和算法的挑战，如基于WiFi的无线通信和计算网络，包括可扩展的拓扑结构维护，移动建模，并行化和同步。我们探讨这些网络的模拟和相互作用的多粒子系统，如分子动力学（MD）模拟模拟之间的相似性和差异。我们将展示如何从我们的MD模拟，我们已经适应了细胞链表算法可以用来大大提高计算性能的无线网络模拟器中存在的流动性，并说明一个例子，从我们的仿真研究蠕虫攻击移动无线自组织网络。
英文摘要：
Wireless Fidelity (WiFi) is the fastest growing wireless technology to date. In addition to providing wire-free connectivity to the Internet WiFi technology also enables mobile devices to connect directly to each other and form highly dynamic wireless adhoc networks. Such distributed networks can be used to perform cooperative communication tasks such ad data routing and information dissemination in the absence of a fixed infrastructure. Furthermore, adhoc grids composed of wirelessly networked portable devices are emerging as a new paradigm in grid computing. In this paper we review computational and algorithmic challenges of high-fidelity simulations of such WiFi-based wireless communication and computing networks, including scalable topology maintenance, mobility modelling, parallelisation and synchronisation. We explore similarities and differences between the simulations of these networks and simulations of interacting many-particle systems, such as molecular dynamics (MD) simulations. We show how the cell linked-list algorithm which we have adapted from our MD simulations can be used to greatly improve the computational performance of wireless network simulators in the presence of mobility, and illustrate with an example from our simulation studies of worm attacks on mobile wireless adhoc networks.
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