Long term fair scheduling in a cognitive wireless network with spectrum underlay
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
REX: a randomized exclusive region based scheduling scheme for mmWave WPANs withdirectional antenna
IEEE Transactions on Wireless Communications
Practical scheduling algorithms for concurrent transmissions in rate-adaptive wireless networks
INFOCOM'10 Proceedings of the 29th conference on Information communications
Overhearing-aware joint routing and rate selection in multi-hop multi-rate UWB-based WPANs
INFOCOM'10 Proceedings of the 29th conference on Information communications
Cross-layer design for efficient resource utilization in wimedia UWB-based WPANs
ACM Transactions on Modeling and Computer Simulation (TOMACS)
IEEE Transactions on Wireless Communications
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With the capability of supporting very high data rate services in a short range, ultra-wideband (UWB) technology is appealing to multimedia applications in future wireless personal area networks (WPANs) and broadband home networks. However, the WPAN medium access control (MAC) protocol in IEEE 802.15.3 standard was originally designed for narrowband communication networks, without considering any specific features of UWB. In this paper, we explore the unique characteristics of UWB communications from which a sufficient condition for scheduling concurrent transmissions in UWB networks is derived: concurrent transmissions can improve the network throughput if all senders are outside the exclusive regions of other flows. We also study the optimal exclusive region size for a UWB network where devices are densely and uniformly located. Since the optimal scheduling problem for peer-to-peer concurrent transmissions in a WPAN is NP-hard, the induced computation load for solving the problem may not be affordable to the network coordinator, commonly a normal UWB device with limited computational power. We propose two simple heuristic scheduling algorithms with polynomial time complexity. Extensive simulations with random network topology demonstrate that, by exploiting the unique characteristics of UWB communications and allowing concurrent transmissions appropriately, the proposed exclusive-region based scheduling algorithms can significantly increase the network throughput.