  Recently, the wireless community has initiated research on the sixth
generation (6G) cellular network for the next decade. The 6G visions are still
under development but are converging toward ubiquitous, sustainable, and
automated digital society. A network-in-a-box (NIB) is a portable and
fully-fledged networking solution that has many potentials to stimulate 6G
visions, especially for ubiquitous and resilient network connectivity. In this
article, we highlight how NIB features suit 6G use cases and requirements and
how it can be used for 6G communications. In addition, we discuss the
challenges of the potential enabling technologies of 6G that can reinforce the
NIB performance.
