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On the downlink interference in heterogeneous wireless DS-CDMA networks

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<mark>Journal publication date</mark>02/2006
<mark>Journal</mark>IEEE Transactions on Wireless Communications
Issue number2
Volume5
Number of pages10
Pages (from-to)384-393
Publication statusPublished
Original languageEnglish

Abstract

In this paper, we show that the total downlink interference in heterogeneous wireless DS-CDMA networks follows an asymptotically self-similar (as-s) process. The as-s model is valid for the interference under certain conditions on channel variations and traffic characteristics that cover a range of practical situations. We derive these conditions and generalize earlier results, obtained for data-centric cellular networks, to heterogeneous cellular networks. Simulation results for actual cases confirm analytical results, and show that non-uniform spatial distribution of users and their soft-hand-off status do not affect the nature of this self-similar process. Furthermore, we discuss the impact of the analysis developed in this paper in designing appropriate mechanisms for controlling radio resources in such networks.