Cross-layer optimization for UWB-based ad hoc networks

Authors:
Yi Shi;Y. Thomas Hou;Hanif D. Sherali;Sastry Kompella
Affiliations:
The Bradley Department of Electrical and Computer Engineering, Virginia Tech, Blacksburg, VA;The Bradley Department of Electrical and Computer Engineering, Virginia Tech, Blacksburg, VA;The Grado Department of Industrial and Systems Engineering, Virginia Tech, Blacksburg, VA;Naval Research Laboratory, Washington, DC
Venue:
MILCOM'06 Proceedings of the 2006 IEEE conference on Military communications
Year:
2006

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Abstract

In this paper, we consider a UWB-based ad hoc network and study how to maximize data rate utility for a group of communication sessions. We formulate the data rate utility problem into a nonlinear programming (NLP) problem through a cross-layer approach by taking into consideration of scheduling and power control at link layer and routing at network layer. The main contribution of this paper is the development of a solution procedure based on branch-and-bound framework. We employ a powerful optimization technique called reformulation linearization technique (RLT) to obtain a linear relaxation, which is a key component required in the branch-and-bound framework. Numerical results demonstrate the importance of cross-layer approach and offer some important insights.