In smart cities, the Internet-of-Thing (IoT) provides an enabling communication infrastructure to support tremendous amount of data exchange. Most IoT applications, e.g., wireless local area network, Bluetooth and so forth, utilize the channel-hopping scheme to suppress the transmission security threats. In this paper, to reduce the mutual interference and external jamming attacks, multiple novel channel-hopping patterns, i.e., traditional no-hit-zone (NHZ) hopping pattern and generalized NHZ hopping pattern, are introduced to suit to IoT networks. Particularly the design of probabilistic hopping pattern is first proposed, which has the various usage probabilities with regard to various channels. The properties of these hopping patterns are investigated by the step-to-step examples. Then, the error-rate performance of the multi-node IoT systems adopting these hopping patterns in the presence of jamming attacks is comprehensively analyzed. The extensive simulations show that the traditional/generalized NHZ hopping patterns are in favor of combating the mutual interference but with the limited capability of reducing jamming attacks, while the probabilistic hopping pattern possesses the opposite feature, that is, it has the predominant merit in suppressing jamming attacks. Thus, the novel channel-hopping pattern-based IoT could provide the secure transmission for communication applications in smart cities. Note that, as the physical-layer security technique, the channel-hopping patterns investigated in this paper are convenient to integrate with the security policies implemented in upper layers (e.g., encryption, authentication and so forth).

在智慧城市中，物联网 (IoT) 提供了支持大量数据交换的通信基础设施。大多数物联网应用，例如无线局域网、蓝牙等，都利用跳频方案来抑制传输安全威胁。在本文中，为了减少相互干扰和外部干扰攻击，引入了多种新颖的信道跳频模式，即传统的非命中区（NHZ）跳频模式和广义的NHZ跳频模式，以适应物联网网络。特别是首先提出了概率跳频模式的设计，它对于不同的信道具有不同的使用概率。这些跳跃模式的特性通过逐步示例进行研究。然后，综合分析了在存在干扰攻击的情况下采用这些跳频模式的多节点物联网系统的误码率性能。大量仿真表明，传统/广义NHZ跳频模式有利于对抗相互干扰，但减少干扰攻击的能力有限，而概率跳频模式则具有相反的特点，即在抑制干扰方面具有优势。干扰攻击。因此，新型基于信道跳频模式的物联网可以为智慧城市中的通信应用提供安全传输。请注意，作为物理层安全技术，本文研究的信道跳频模式可以方便地与上层实施的安全策略（例如，加密、