An energy-efficient power control algorithm in femtocell networks

Abstract

The efficient usage of radio resources is a major challenge in a two tier cellular network-comprised of a central macrocell underlaid with shorter range femtocell hotspots. Power optimization technique is important for radio resource management, since the deployment of femtocells may cause serious cross-tier interference and then limit overall capacity with universal frequency reuse. This paper derives an energyefficient power control scheme for an interference-limited twotier femtocell network in the analytical setting of a game theoretic framework. In the context, we present a non-cooperative power control game for a two-tier spectrum-sharing femtocell network. Specifically, in order to guarantee cellular user's Signal-toInterference-Pius-Noise Ratio(SINR) target, an algorithm is proposed that reduces transmission powers of the strongest femtocell interferers. According to the simulation results, the proposed scheme can significantly improve energy efficiency of cellular network.

Autonomous Distributed Power Control in Multi-Channel Cognitive Femtocell Network: Feasibility and Convergence

“…At the initial stage, the feasibility and convergence test was performed on the DPC method or often referred to Power Balancing Algorithm (PBA) as outlined in equation (6). The feasibility of a system can be affected by a range of users, number of users and the SINR target.…”

“…Designing an efficient power control scheme will be very challenging especially in femtocell, mainly because of the nature of the autonomous network [4]. Power control schemes are studied mainly to minimize interference and ensure the fulfillment of quality of service (QoS) [5], to maximize the capacity and to reduce the energy consumption [6], to realize the green wireless communication and to overcome the trade-off QoS with efficiency energy better [7] and more effectively to overcome the noise [8] [9].…”

Capacity conservation ratio: a novel interference constraint for spectrum sharing

“…On one hand, the application scope of the spectrum sharing is extended. This underlay type has been attracted to apply to the cellular networks as the heterogeneous networks (HetNet) or the Device‐to‐Device (D2D) communication . The HetNet and the D2D communication are the spectrum sharing between the cellular network and short range communication in the overlapped coverages.…”

Modelling and performance analysis of different access schemes in two-tier wireless networks

“…The incorporation of femtocells to a cellular network is emerging as a potential solution to achieve these two goals [3]. In this scenario, user terminals meet with the dilemma of choosing an adequate access scheme [4], [5].…”