Thanks to its ability to effectively counteract disturbance and interference, including the traffic generated by co-located Wi-Fi networks, Time Slotted Channel Hopping (TSCH) is currently gaining momentum in many application fields characterized by demanding reliability and determinism requirements. In particular, the ability of TSCH to change transmission frequency on every attempt sensibly mitigates packet losses and latencies, improving the overall behavior in a tangible way.

In this paper, the communication quality achieved by TSCH in a setup that includes real motes exposed to a realistic interfering traffic is evaluated experimentally. A theoretical model is also developed, based on quite simple assumptions about the effectiveness of time and frequency diversity, which satisfactorily matches the real behavior. The model permits to determine how much network parameters like, e.g., the retry limit, actually affect communication, and can be exploited to find proper settings for them. Finally, the ability of channel hopping to prevent narrowband interference from disrupting communication is assessed. As results show, this mechanism makes motes suffer from an equivalent interference that roughly corresponds to the mean interference evaluated over all physical channels.

由于其有效地抵抗干扰和干扰的能力，包括同位Wi-Fi网络产生的流量，时隙信道跳变（TSCH）当前在许多对可靠性和确定性有严格要求的应用领域中得到了发展。特别是，TSCH在每次尝试中更改传输频率的能力都可以合理地减轻数据包丢失和延迟，从而切实改善整体行为。

在本文中，通过实验评估了TSCH在包含暴露于现实干扰流量的真实微粒的设置中实现的通信质量。还基于关于时间和频率分集有效性的非常简单的假设，开发了理论模型，该模型令人满意地匹配了实际行为。该模型允许确定多少网络参数（例如，重试限制）实际上影响通信，并且可以利用该参数为它们找到合适的设置。最后，评估了信道跳变防止窄带干扰破坏通信的能力。结果表明，这种机制使节点遭受等效干扰，该干扰大致对应于所有物理信道上评估的平均干扰。