A wireless hybrid contention/TDMA-based MAC for real-time mobile application

Authors:
Marcelo M. Sobral;Leandro B. Becker
Affiliations:
Federal University of Santa Catarina, Florianopolis, SC, Brazil;Federal University of Santa Catarina, Florianopolis, SC, Brazil
Venue:
Proceedings of the 2008 ACM symposium on Applied computing
Year:
2008

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Abstract

Wireless communication has been successfully used in a variety of mobile applications, including those with real-time requirements. In such systems, timing guarantees are normally obtained by using a TDMA-based Medium Access Control (MAC) protocol, relying in a coordinator node in charge of time-slots allocation. However, certain applications cannot make use of such coordinator because it simply does not exist, normally due to restrictions in the operation environment. To solve this problem we present in this paper a MAC protocol that operates without a central coordinator, with minimum global information, and with no previous assignments of roles to nodes nor resource reservations. Our proposed Hybrid Contention/TDMA-based (HCT) MAC is specially designed to work with ad-hoc wireless networks organized in clusters, providing timely bounded communications both inside and outside the clusters. This paper presents a detailed description of the resource reservation procedure of HCT, including an analytical analysis of its expected performance.