Abstract
Several MAC protocols for ad-hoc networks have been proposed in the literature for topologies with a large number of nodes. In particular, the MAC protocols based on 802.11 cannot guarantee the delays needed by real-time traffic, as they are mainly based on the CSMA/CA random access scheme, which inserts significant random inter-frame delay components, strongly dependent on network load. Other MAC protocols assign dynamically a dedicated channel to each connected node. In this way, it is possible to guarantee a strictly controlled delay for real-time traffic at the expense of a greater bandwidth waste. The goal of this paper is to evaluate the performance of a MAC protocol of this latter family. Our analysis is focused on scenarios with fast moving users, while in the literature most of the proposed MACs, also for mobile ad-hoc networks, are studied in the case of stationary users. Our study shows that the system performance strongly depends on the users’ speed and provides an accurate analysis of the performance degradation registered as speed grows.
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ACKNOWLEDGMENTS
This work is partially supported by the Italian FIRB (Fondo per gli Investimenti della Ricerca di Base) project MAIS (Multichannel Adaptive Information Systems).
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Caizzone, G., Giacomazzi, P., Musumeci, L. et al. Performance Analysis of a Flexible MAC Protocol for Real-Time Services in Vehicular Ad-Hoc Networks. Int J Wireless Inf Networks 12, 147–157 (2005). https://doi.org/10.1007/s10776-005-0002-1
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DOI: https://doi.org/10.1007/s10776-005-0002-1