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A novel predictive link state indicator for ad-hoc networks

机译:Ad-hoc网络的新型预测性链接状态指示器

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Mobile Ad-hoc Networks (MANET) and more specifically their vehicular variant (VANET) have to deal with fast changing channel conditions, specifically in urban areas. Routing protocols that have to build end to end paths over such volatile links typically react to link failure. In this paper we present a novel PHY layer based link state indicator which aims to predict such failure. The proposed link state indicator is related to the IEEE 802.11 standard and relies on the OFDM decoding process. PhySimWifi is a detailed and accurate implementation of the OFDM-based IEEE 802.11 standard that provide access to all the steps of a packet reception and incorporates realistic channel models. When using it in the ns-3 simulator, the received packets decoding errors / success gives us the material to compute our predictive estimator. This new link state indicator is entirely based on the PHY level. The efficiency of the proposed indicator is validated by reference to PHY and NET packet reception ratio of the monitored link. The efficiency of the proposed new indicator is validated by comparing it with an Signal to Noise Ratio based predictive link state estimator.
机译:移动自组织网络(MANET),尤其是其车载变体(VANET)必须应对快速变化的信道状况,尤其是在城市地区。必须在此类易失性链路上建立端到端路径的路由协议通常会对链路故障做出反应。在本文中,我们提出了一种新颖的基于PHY层的链路状态指示器,旨在预测这种故障。所提出的链路状态指示符与IEEE 802.11标准有关,并且依赖于OFDM解码过程。 PhySimWifi是基于OFDM的IEEE 802.11标准的详细而准确的实现,该标准提供对数据包接收所有步骤的访问,并结合了实际的信道模型。在ns-3仿真器中使用它时,收到的数据包解码错误/成功为我们提供了计算预测估计器的素材。这个新的链路状态指示符完全基于PHY级别。通过参考被监视链路的PHY和NET数据包接收比率来验证所提出指标的效率。通过将其与基于信噪比的预测链路状态估计器进行比较,可以验证所提出的新指标的效率。

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