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arXiv 1004.0422cs.NI
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阴影效应对多跳Ad Hoc网络路由协议的影响

Shadowing Effects on Routing Protocol of Multihop Ad Hoc Networks

Anwar Hossain, Mohammed Tarique, Rumana Islam

摘要:

双射线地面反射模型已被广泛用作研究adhoc网络性能的传播模型。但双射线模型太简单,无法代表真实世界的网络。本文采用了一种更符合实际的模型,即阴影传播模型。在阴影传播模型下,移动节点可以以低于所需阈值水平的信号水平接收分组。这种低信号电平影响网络的路由协议以及媒体访问控制协议。本文提出了一个分析模型来研究阴影效应对网络性能的影响。仿真结果验证了该模型的正确性。仿真结果表明,与简单的双射线模型相比,阴影传播模型的网络性能变得很差。本文还提出了两种解决方案,以克服阴影的影响。一种解决方案是物理层解决方案,另一种是媒体访问控制(MAC)层解决方案。仿真结果表明,这两种方法都能有效地降低阴影效应,提高网络性能。

英文摘要:

Two-ray ground reflection model has been widely used as the propagation model to investigate the performance of an ad hoc network. But two-ray model is too simple to represent a real world network. A more realistic model namely shadowing propagation model has been used in this investigation. Under shadowing propagation model, a mobile node may receive a packet at a signal level that is below a required threshold level. This low signal level affects the routing protocol as well as the medium access control protocol of a network. An analytical model has been presented in this paper to investigate the shadowing effects on the network performance. The analytical model has been verified via simulation results. Simulation results show that the performance of a network becomes very poor if shadowing propagation model is used in compare to the simple two-ray model. Two solutions have also been proposed in this paper to overcome the effects of shadowing. One solution is a physical layer solution and the other one is a Medium Access Control (MAC) layer solution. Simulation results show that these two solutions reduce the shadowing effect and improve network performance.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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