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

© The Institution of Engineering and Technology
Received 25/02/2014, Published 04/04/2014

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.

Inspec keywords: interference suppression; adaptive control; power control; mobility management (mobile radio); radio equipment; femtocellular radio

Other keywords: SINR; interference mitigation; max-min function; coverage radius based downlink power control scheme; FAP self-update algorithm; system level simulation; femtocell user equipment; femtocells deployment; signal to interference plus noise ratio; adaptive power control scheme; downlink transmit power value adjustment; FUE; coverage radii variation; femtocells access point

Subjects: Mobile radio systems; Electromagnetic compatibility and interference; Control applications in radio and radar; Power and energy control; Self-adjusting control systems

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