  To boost the capacity of the cellular system, the operators have started to
reuse the same licensed spectrum by deploying 4G LTE small cells (Femto Cells)
in the past. But in time, these small cell licensed spectrum is not sufficient
to satisfy future applications like augmented reality (AR)and virtual reality
(VR). Hence, cellular operators look for alternate unlicensed spectrum in Wi-Fi
5 GHz band, later 3GPP named as LTE Licensed Assisted Access (LAA). The recent
and current rollout of LAA deployments (in developed nations like the US)
provides an opportunity to understand coexistence profound ground truth. This
paper discusses a high-level overview of my past, present, and future research
works in the direction of small cell benefits. In the future, we shift the
focus onto the latest unlicensed band: 6 GHz, where the latest Wi-Fi version,
802.11ax, will coexist with the latest cellular technology, 5G New Radio(NR) in
unlicensed
