Cross-layer optimization of multipoint message broadcast in MANETs

Authors:
Jimmy Jessen Nielsen;Jesper Grønbæk;Thibault Renier;Hans-Peter Schwefel;Thomas Toftegaard
Affiliations:
Department of Electronic Systems, Aalborg University;Department of Electronic Systems, Aalborg University;Department of Electronic Systems, Aalborg University;Department of Electronic Systems, Aalborg University and Forschungszentrum Telekommunikation Wien, Vienna, Austria;Tieto IP Solutions, Viby J, Denmark
Venue:
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
Year:
2009

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Abstract

Multipoint-to-multipoint message broadcast is a demanding application scenario in ad-hoc networks. Adaptive management of wireless resources is necessary to support such applications in a safety critical context. In this work we study adaptation of transmission rate and power to varying densities of ad-hoc nodes. Our approach is to construct a cross-layer model building on existing models for physical and link layers. To enable optimization in relation to metrics of end-to-end delay and message reception probability a model of flooding broadcast is proposed as a part of the cross-layer model. In a simulation study we show that adaptation of transmission power and rate can be necessary to achieve delay requirements and maximize message reception probability. Compared to simulation our cross-layer model based optimization approach generates slightly more conservative parameter settings. It is further shown how correlated losses have a significant impact on the robustness of the broadcast technique.