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.

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Keywords Asymptotically self-similar process, downlink, heavy-tail distribution, heterogeneous cellular DS-CDMA networks, interference
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Journal IEEE Transactions on Wireless Communications
Navaie, K. (Keivan), & Valaee, S. (Shahrokh). (2006). On the Downlink Interference in Heterogeneous Wireless DS-CDMA Networks. IEEE Transactions on Wireless Communications, 5(2), 384–393. doi:10.1109/TWC.2006.1611062