Approaches to the dynamic efficiency in wireless communications

The electromagnetic pollution and bandwidth problems in the wireless industry nowadays are considered crucial issues, but both have already been solved by using green communication, which reduces carbon dioxide (CO₂) emissions as well as energy consumption, and cognitive radio, which provides high bandwidth to mobile users. This paper proposes and analyzes a new efficiency for future wireless communication, called dynamic efficiency (m.b/s/W or m.b.Hz/s/Hz/W) metrics. The proposed efficiency is design tactic for “cognitive radio” and “green communication” consisting of the monitoring of transmission frequency, power and distance. The dynamic efficiency is either a convex or a concave function depending on the transmission frequency with respect to transmission power and distance. If the transmission frequency is between 82.37 MHz and 657.35 MHz, dynamic efficiency function is convex; otherwise it is concave.