R‐11‐based power control approach for overlaid femtocell networks

Abstract

SummaryShort range, low power, plug‐and‐play femtocell has carved a niche for itself because of its potential for higher rate indoor voice and data service, coverage enhancement over cell edges, high network capacity, and negligible greenhouse gas emission. The frequency reuse phenomenon in two‐tier cellular network subjects the cell‐edge macrouser to severe downlink interference from co‐channel deployed femtocells in the same province. Downlink power control approach is a recommended remedy to overcome such type of interferences. This paper proposes release‐11‐based maximum downlink power control (R‐11‐based MDPC) approach to protect macrouser's service from co‐channel interference. The feedback strategy incorporated in this paper is formulated by R‐11 of 3rd Generation Partnership Program for Long Term Evolution standard. Implementation of new R‐11‐based feedback strategy between femto‐base station and macro‐base station with MDPC approach ensures instantaneous power control with minimal feedback delay, higher signal‐to‐interference‐plus‐noise ratio (SINR), simple receiver module design, and better service availability. Simulation results of R‐11‐based MDPC approach clearly indicate reduced feedback delay, better power control with minimal interference, improved SINR, and negligible outage probability. Copyright © 2015 John Wiley & Sons, Ltd.