Wireless Pers Commun DOI 10.1007/s11277-009-9896-8 Adaptive Beam-Centric Admission Control for WCDMA Multicell/Multiservice Scenarios with Non-Uniform Traffic P. K. Gkonis · T. E. Athanaileas · G. V. Tsoulos · G. E. Athanasiadou · D. I. Kaklamani © Springer Science+Business Media, LLC. 2009 Abstract The goal of the study presented in this paper is the accurate performance evaluation of adaptive beam-centric admission control (AC) for wideband code-division multiple access (WCDMA) multicell networks with non-uniform traffic requirements. Each NodeB employs antenna arrays (AAs), used either to form fixed grids of beams (FGoBs), or to steer and shape multiple beams towards directions of increased traffic, in an adaptive man- ner. The adaptive beam-centric AC maximizes the cell throughput in a multirate/multicell environment by grouping as many users as possible under a common beam formed by the AA, taking into account their spatial distribution and overall interference. Due to the increased complexity of the Monte Carlo (MC) simulations, a novel grid-enabled problem solving environment has been developed in order to reduce execution times considerably and make feasible full scale extensive simulations of complex operational scenarios (up to 4 tiers of cells, multiple beams per cell, non-uniform traffic distributions with different spatial char- acteristics). Results show that the network with the adaptive beam-centric AC can achieve significantly higher throughput per beam in multirate/multicell environments with hotspots. In particular, it is shown that the throughput per beam gain depends exponentially on the P. K. Gkonis (B ) · T. E. Athanaileas · D. I. Kaklamani School of Electrical and Computer Engineering, National Technical University of Athens, Heroon Polytechniou 9, 15773 Athens, Greece e-mail: pgkonis@esd.ntua.gr T. E. Athanaileas e-mail: thathan@esd.ntua.gr D. I. Kaklamani e-mail: dkaklam@mail.ntua.gr G. V. Tsoulos · G. E. Athanasiadou Department of Telecommunications Science & Technology, Wireless & Mobile Communications Lab, University of Peloponnese, Tripolis 22100, Greece G. V. Tsoulos e-mail: gtsoulos@uop.gr G. E. Athanasiadou e-mail: gathanas@uop.gr 123