NDLI: Cross-layer modelling for efficient of non-realtime data traffic over downlink DS-CDMA heterogeneous networks

Content Provider	IEEE Xplore Digital Library
Author	Navaie, K. Valaee, S. Sousa, E.S.
Copyright Year	2005
Description	Author affiliation: Dept. of Syst. & Comput. Eng., Carleton Univ., Ottawa, Ont., Canada (Navaie, K.)
Abstract	In this paper, we develop a cross-layer model for downlink interference in heterogeneous DS-CDMA wireless cellular networks. In this model, interference is described as a function of application layer parameters (traffic characteristics) and physical layer variations (channel characteristics). We show that for a heterogeneous service DS-CDMA network, downlink interference is a second-order self-similar process and thus has long-range dependence. We then use the predictive structure of total downlink interference to maximize non-realtime data throughput. We use fractional Gaussian noise (fGn) to model the self-similarity of downlink interference. In the proposed method, the base-station uses an optimal linear predictor, based on the fGn model, to estimate the level of interference. The estimated interference is then used to allocate power to users. To maximize data throughput, we use time domain scheduling. The simulation studies confirm the self-similarity of downlink interference and validate the fGn model. The simulation results also show a substantial performance improvement using the proposed predictive-adaptive scheme and confirm that the interference model is still valid after applying the proposed method.
Starting Page	92
Ending Page	99
File Size	571115
Page Count	8
File Format	PDF
ISBN	0780391810
DOI	10.1109/WIMOB.2005.1512822
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-08-24
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Gaussian noise Land mobile radio cellular systems Telecommunication traffic Interference Traffic control Predictive models Downlink Throughput Physical layer Multiaccess communication
Content Type	Text
Resource Type	Article

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