title: An MBS-assisted femtocell transmit power control scheme with mobile user QoS guarantee in 2-tier heterogeneous femtocell networks.
abstract: This study investigates how to adjust the transmit power of femto base station (FBS) to mitigate interference problems between the FBSs and mobile users (MUs) in the 2-tier heterogeneous femtocell networks. A common baseline of deploying the FBS to increase the indoor access bandwidth requires that the FBS operation will not affect outdoor MUs operation with their quality-of-service (QoS) requirements. To tackle this technical problem, an FBS transmit power adjustment (FTPA) algorithm is proposed to adjust the FBS transmit power (FTP) to avoid unwanted cochannel interference (CCI) with the neighboring MUs in downlink transmission. FTPA reduces the FTP to serve its femto users (FUs) according to the QoS requirements of the nearest neighboring MUs to the FBS so that the MU QoS requirement is guaranteed. Simulation results demonstrate that FTPA can achieve a low MU outage probability as well as serve FUs without violating the MU QoS requirements. Simulation results also reveal that FTPA has better performance on voice and video services which are the major trend of future multimedia communication in the NGN.
authors.affiliation: Department of Computer Science and Information Engineering, School of Electrical and Computer Engineering, College of Engineering, Chang Gung University, Kweishan, Taoyuan 33302, Taiwan.
authors.forename: Jenhui
authors.initials: J
authors.lastname: Chen
authors.affiliation: Department of Communication Engineering, National Central University, Chung-Li 32001, Taiwan.
authors.forename: Chih-Cheng
authors.initials: CC
authors.lastname: Yang
authors.affiliation: Department of Communication Engineering, National Central University, Chung-Li 32001, Taiwan.
authors.forename: Shiann-Tsong
authors.initials: ST
authors.lastname: Sheu
mesh_terms: D000465:Algorithms; D040421:Cell Phone / Q000295:instrumentation*; D011211:Electric Power Supplies; D004581:Electronics / Q000379:methods*; D008962:Models, Theoretical; D012815:Signal Processing, Computer-Assisted; D059015:Wireless Technology / Q000295:instrumentation*