Efficacy of coverage radius-based power control scheme for interference mitigation in femtocells

• Published in: Electronics letters Vol. 50; no. 8; pp. 639 - 641
• Main Authors: Kpojime, H.O, Safdar, G.A
• Format: Journal Article
• Language: English
• Published: Stevenage The Institution of Engineering and Technology 10.04.2014; Institution of Engineering and Technology; John Wiley & Sons, Inc
• Subjects: adaptive control; Adaptive control systems; adaptive power control scheme; Applied sciences; Cellular communication; Computer simulation; coverage radii variation; coverage radius based downlink power control scheme; downlink transmit power value adjustment; Effectiveness; Equipments and installations; Exact sciences and technology; FAP self‐update algorithm; femtocell user equipment; femtocells access point; femtocells deployment; femtocellular radio; FUE; Interference; interference mitigation; interference suppression; max‐min function; Mobile radiocommunication systems; mobility management (mobile radio); Neighbouring; Pilots; Power control; radio equipment; Radiocommunications; signal to interference plus noise ratio; SINR; system level simulation; Telecommunications; Telecommunications and information theory; Wireless communications; radio equipment; coverage radius based downlink power control scheme; interference suppression; femtocell user equipment; FAP self-update algorithm; adaptive control; mobility management (mobile radio); femtocells access point; femtocellular radio; femtocells deployment; max-min function; FUE; adaptive power control scheme; power control; signal to interference plus noise ratio; SINR; downlink transmit power value adjustment; interference mitigation; coverage radii variation; system level simulation; Interference suppression; Wireless LAN; Indoor installation; Cellular radio; Power control; Downlink; Updating; Wireless network; Signal to interference plus noise ratio; Adaptive control; Local network
• ISSN: 0013-5194; 1350-911X; 1350-911X
• DOI: 10.1049/el.2014.0557

A novel coverage radius-based downlink power control scheme to mitigate interference in densely deployed femtocells is presented. A femtocell access point (FAP) self-update algorithm is implemented, which determines the coverage radius of the femtocell with respect to its farthest served femtocell user equipment (FUE). Based on varying coverage radii, a max/min function is used to adjust the downlink transmit power value of a FAP. System-level simulations are performed to compare the performance of the presented scheme with the existing fixed coverage radius schemes. Even though the proposed scheme results in better cross-tier signal to interference plus noise ratio (SINR) values, due to a low co-tier SINR it is found that the efficacy of adaptive power control schemes based on the pilot power of a FAP is less significant if FUEs are located close to the neighbouring FAPs in densely deployed urban femtocells.