Private network deployment is gaining momentum in warehouses, retail, automation, health care, and many such use cases to guarantee mission-critical services with less latency. Guaranteeing the delay-sensitive application in Wi-Fi is always challenging due to the nature of unlicensed spectrum. As the device ecosystem keeps growing and expanding, all the current and future devices can support both Wi-Fi and Private Cellular Network (CBRS is the primary spectrum in the US for private network deployment). However, due to the existing infrastructure and huge investment in the dense Wi-Fi network, consumers prefer two deployment models. The first scenario is deploying the private network outdoors and using the existing Wi-Fi indoors. The second scenario is to use the existing Wi-Fi network as a backup for offloading the traffic indoors and parallely utilizes the private network deployment for less latency applications. Hence, we expect, in both scenarios, a roaming between two technologies \emph{i.e.,} Wi-Fi and Private Cellular Network. In this work, we would like to quantify the roaming performance or service interruption time when the device moves from Wi-Fi to Private Network (CBRS) and vice-versa.

翻译：专用网络部署在仓库、零售、自动化、医疗健康及众多类似应用场景中正加速推进，旨在以更低时延保障关键任务型服务。由于非授权频谱的固有特性，在Wi-Fi中保障时延敏感型应用始终面临挑战。随着设备生态系统持续发展扩张，当前及未来所有设备均可同时支持Wi-Fi与专用蜂窝网络（CBRS是美国专用网络部署的主要频谱）。然而，受现有基础设施及密集Wi-Fi网络巨额投资的影响，消费者更倾向于两种部署模式：第一种场景是在室外部署专用网络，并在室内沿用现有Wi-Fi；第二种场景是将现有Wi-Fi网络作为室内流量卸载的备用方案，同时利用专用网络部署满足低时延应用需求。因此，我们预期这两种场景下均存在Wi-Fi与专用蜂窝网络两种技术间的漫游需求。本研究旨在量化设备从Wi-Fi切换至专用网络（CBRS）及反向切换过程中的漫游性能或服务中断时间。