Radio Environment Map Construction: A Mini-Review

Radio Environment Map (REM) is a multi-domain radio information of a geographical location. In the contemporary period, the proliferation of wireless communication has played a significant role in driving the advancement of emerging technologies, including edge computing and the Internet of Things (IoT). Consequently, there exists a pressing necessity to optimize the utilization of the limited spectrum resources available. A technical paradigm embraced by Federal Communications Commission (FCC) to enhance spectrum efficiency is the Database-driven Dynamic Spectrum Sharing (DSS) where users with no prime right (secondary user) are allow to opportunistically use the licensed spectrum. The information contained in REM plays a vital role in DSS. This paper reviews the REM concept, the layers of information contained in the REM, REM construction techniques, related works in literature, the state-of-the-art methodology and REM applications.