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首页> 外文会议>IEEE Annual International Symposium on Personal, Indoor, and Mobile Radio Communications >Holistic link quality estimation-based routing metric for RPL networks in smart grids
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Holistic link quality estimation-based routing metric for RPL networks in smart grids

机译：智能电网中RPL网络的全面链路质量估计基于路由度量

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Wireless Sensor Networks (WSNs) have been recognized as a promising communication technology for smart grid monitoring and control applications. Unfortunately, environmental conditions in smart grids are complex and harsh (electromagnetic interference, obstructions, fading, etc.), which turns radio links extremely unreliable. Routing protocols play a crucial role to overcome low-power link unreliability in smart grid environments. Especially, RPL (IPv6 Routing Protocol for Low Power and Lossy Networks) is an IETF standard that is supposed to meet the requirements of WSN-based smart grid communications. RPL routing metric relies on link quality estimation through ETX (Expected Transmission Count) assessment, to identify high quality links for data delivery. However, ETX is not sufficiently accurate as it assesses a particular link aspect, number of packet retransmissions over the link, and ignores other important aspects such as channel quality. Consequently, as confirmed by recent experimental studies, RPL can fail to identify routing paths with high quality links leading to high packet loss rates. In this paper, we propose an alternative routing metric for RPL based on holistic link quality estimation, where several link metrics are combined. Based on COOJA simulations, we demonstrate that our proposed routing metric improves RPL performance over traditional routing metrics, including the RPL default metric, mainly in terms of packet loss ratio, end-to-end delay, energy efficiency, and topology stability.
机译：无线传感器网络（WSN）已经被认为是有前途的通信技术的智能电网监视和控制应用。不幸的是，在智能电网环境条件复杂和苛刻（电磁干扰，阻碍，褪色等），果然极不可靠的无线链路。路由协议发挥克服智能电网环境下低功率链路的不可靠性至关重要的作用。特别是，RPL（IPv6路由协议的低功耗和有损网络）是应该满足基于WSN-智能电网通信的需求的IETF标准。 RPL路由度量依赖于链路质量估计通过ETX（期望传输计数）的评估，以确定数据传输高质量的链接。然而，ETX不够准确，因为它评估的特定链接方案，分组重发的数目在链路上，而忽略其他重要方面如信道质量。因此，通过最近的实验研究证实，RPL可能无法识别具有高质量的链接导致高丢包率的路由路径。在本文中，我们提出了一个替代基于整体链路质量估计，其中几个链接指标相结合的路由RPL度量。基于COOJA模拟，我们证明了我们提出的路由度量改善了传统路由指标，包括RPL缺省度量RPL性能，主要表现在丢包率，端到端的时延，能源效率和拓扑稳定性方面。

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