Advanced metering infrastructure (AMI) is the core component of the smart grid. As the wireless connection between smart meters in AMI is featured with high packet loss and low transmission rate, AMI is considered as a representative of the low power and lossy networks (LLNs). In such communication environment, the routing protocol in AMI network is essential to ensure the reliability and real-time of data transmission. The IPv6 routing protocol for low-power and lossy networks (RPL), proposed by IETF ROLL working group, is considered to be the best routing solution for the AMI communication environment. However, the performance of RPL can be seriously degraded due to jamming attack. In this paper, we analyze the performance degradation problem of RPL protocol under jamming attack. We propose a backup node selection mechanism based on the standard RPL protocol. The proposed mechanism chooses a predefined number of backup nodes that maximize the probability of successful transmission. We evaluation the proposed mechanism through MATLAB simulations, results show the proposed mechanism improves the performance of RPL under jamming attack prominently.

先进的计量基础架构（AMI）是智能电网的核心组件。由于AMI中智能电表之间的无线连接具有丢包率高和传输速率低的特点，因此AMI被视为低功耗和有损网络（LLN）的代表。在这种通信环境中，AMI网络中的路由协议对于确保数据传输的可靠性和实时性至关重要。IETF ROLL工作组提出的低功耗有损网络（RPL）的IPv6路由协议被认为是AMI通信环境的最佳路由解决方案。但是，由于干扰攻击，RPL的性能可能会严重下降。在本文中，我们分析了RPL协议在干扰攻击下的性能下降问题。我们提出了一种基于标准RPL协议的备份节点选择机制。提出的机制选择预定义数量的备用节点，以最大程度地提高成功传输的可能性。通过MATLAB仿真对所提出的机制进行了评估，结果表明所提出的机制在干扰攻击下显着提高了RPL的性能。