Wireless Networks

, Volume 16, Issue 3, pp 863–873 | Cite as

Cross-layer enhanced time scheduling for multi-band OFDM UWB networks

Article

Abstract

Multi-band Orthogonal Frequency Division multiplexing based Ultra Wide-band (MB-OFDM UWB) technology is one of the strong alternatives for high data rate wireless personal area networks (WPANs) with low power consumption. The capacity of such systems is degraded by multi-path fading, shadowing, multi-user interference and noise. To improve system capacity under these adverse effects, in this paper, we devise cross-layer time scheduling methods, Proportional Time Scheduling with Modiano Algorithm (PTS-MA) and Proportional Time Scheduling with Channel State Information (PTS-CSI), in which scheduling and link adaptation are performed using instantaneous bit error probability (IBEP) estimates obtained through Modiano’s algorithm and our novel estimation technique, respectively. We evaluate the performance of the PTS schemes by using numerical experiments. Simulation results suggest PTS-CSI scheduler as the most promising candidate for practical MB-OFDM UWB WPANs with high capacity and fair throughput distribution.

Keywords

Opportunistic scheduling Link adaptation Multi-band OFDM Ultra-wide band Instantenous bit error estimation 

Notes

Acknowledgments

This work is supported by the Scientific and Technological Research Council of Turkey (TUBITAK) under grant No. 105E082.

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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  1. 1.Faculty of Engineering & Natural SciencesSabanci UniversityIstanbulTurkey

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