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首页> 外文会议>IEEE 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：智能电网中基于整体链路质量估计的RPL网络路由度量

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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）已被公认为是用于智能电网监视和控制应用程序的有前途的通信技术。不幸的是，智能电网中的环境条件复杂且苛刻（电磁干扰，障碍物，衰落等），这使无线电链路极为不可靠。路由协议在克服智能电网环境中的低功耗链路不可靠性方面发挥着至关重要的作用。特别是RPL（低功耗有损网络的IPv6路由协议）是一种IETF标准，被认为可以满足基于WSN的智能电网通信的要求。 RPL路由度量标准依赖于通过ETX（预期传输计数）评估的链路质量估计，以识别用于数据传输的高质量链路。但是，ETX不够准确，因为它评估特定的链路方面，链路上的数据包重传次数，并忽略其他重要方面，例如信道质量。因此，正如最近的实验研究所证实的那样，RPL可能无法识别具有高质量链路的路由路径，从而导致高丢包率。在本文中，我们提出了一种基于整体链路质量估计的RPL替代路由度量，其中将多个链路度量结合在一起。基于COOJA仿真，我们证明了我们提出的路由度量比传统的路由度量（包括RPL默认度量）提高了RPL性能，主要是在丢包率，端到端延迟，能效和拓扑稳定性方面。

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