Integer and combinatorial optimization
Integer and combinatorial optimization
Computers and Intractability: A Guide to the Theory of NP-Completeness
Computers and Intractability: A Guide to the Theory of NP-Completeness
A Scheduling Framework for UWB & Cellular Networks
BROADNETS '04 Proceedings of the First International Conference on Broadband Networks
Design challenges for energy-constrained ad hoc wireless networks
IEEE Wireless Communications
Ultra-wideband radio technology: potential and challenges ahead
IEEE Communications Magazine
Ultra-wideband for multiple access communications
IEEE Communications Magazine
Guest editorial ultra-wideband radio in multiaccess wireless communications
IEEE Journal on Selected Areas in Communications
Radio resource sharing for ad hoc networking with UWB
IEEE Journal on Selected Areas in Communications
Modeling and optimization of UWB communication networks through a flexible cost function
IEEE Journal on Selected Areas in Communications
Optimal power control, scheduling, and routing in UWB networks
IEEE Journal on Selected Areas in Communications
Challenge: ultra-low-power energy-harvesting active networked tags (EnHANTs)
Proceedings of the 15th annual international conference on Mobile computing and networking
Cross-layer QoS-aware communication for ultra wide band wireless multimedia sensor networks
IEEE Journal on Selected Areas in Communications
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Ultra-wideband (UWB) has great potential for wireless communications in emerging applications such as sensor networks. This paper considers UWB-based sensor networks and studies the following problem: given a set of source sensor nodes in the network each generating a certain data rate, is it possible to relay all these rates successfully to the base-station? We follow a cross-layer optimization approach, with joint consideration of link layer scheduling, power control, and network layer routing. The optimization problem is formulated as a non-linear programming problem. For small-sized networks, we develop a powerful approximation solution procedure to this problem based on the branch-and-bound approach and the novel Reformulation-Linearization Technique (RLT). For large-sized networks, we propose an efficient heuristic algorithm by partitioning the sensor network into a core centered around the base-station and an edge that is outside the core. We also provide a closed-form analysis for the maximum rate that a base-station can receive. Simulation results exhibit the efficacy of our proposed optimization solution procedure and demonstrate the importance of the cross-layer approach to UWB-based sensor networks.