Title :
Scaling Laws of Energy Efficiency Related Metrics for Varying Cell Radii in Downlink Cellular Systems
Author :
Hansung Leem ; Hu Jin ; Dan Keun Sung
Author_Institution :
Dept. of Electr. Eng., KAIST, Daejeon, South Korea
Abstract :
Energy efficiency in wireless communication systems has recently attracted great interest. Small-sized cell topology is a key idea for energy saving. In this letter, we characterize the scaling laws of energy efficiency related metrics such as base station (BS) transmit power, capacity per user, and energy efficiency per user for varying cell radii in downlink cellular networks by investigating the asymptotic behaviors. The scaling laws of the BS transmit power per user, capacity per user, and energy efficiency per user follow Rγ-2, R-2, and R-γ, respectively, where R is the cell radius and γ denotes the path loss exponent.
Keywords :
cellular radio; energy conservation; telecommunication network topology; BS; base station power transmission; capacity per user; cell radii variation; downlink cellular system; energy efficiency related metric; energy saving; path loss exponent; scaling law characterization; small-sized cell topology; wireless communication system; Bandwidth; Computer architecture; Downlink; Interference; Measurement; Microprocessors; Topology; Energy efficiency; Poisson point process; cell size; user activity;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2013.020413.122692
