A wireless sensor networks MAC protocol for real-time applications.
Author
Egea López, Estebán; Vales Alonso, Javier; Martínez Sala, Alejandro Santos; García Haro, Juan; Pavón Mariño, Pablo; [et al.]Knowledge Area
Ingeniería TelemáticaSponsors
This work has been cofunded by the Economy, Industry and Innovation Council, with the SOLIDMOVIL project (2I04SU044), supported by Fundacion Seneca, from the Region of Murcia with the ARENA Project (00546/PI/04), with the ARPaq project (TEC2004-05622-C04-02/TCM) by the Spanish Research Council and the CSI-RHET project (TEC2005-08068-C04-01/TCM).Publication date
2008-01Publisher
Springer VerlagBibliographic Citation
EGEA LÓPEZ, E., VALES ALONSO, J., MARTÍNEZ SALA, A., GARCÍA HARO, J., PAVÓN MARIÑO, P., BUENO DELGADO, M.V., A wireless sensor networks MAC protocol for real-time applications. Personal and Ubiquitous Computing, vol.12 (2): 111-122, January 2008. ISSN 1617-4917Keywords
Wireless sensor networksMAC protocols
Real-time applications
Abstract
Wireless Sensor Networks (WSN) are designed for data gathering and processing, with particular requirements: low hardware complexity, low energy consumption, special traffic pattern support, scalability, and in some cases, real-time operation. In this paper we present the Virtual TDMA for Sensors (VTS) MAC protocol, which intends to support the previous features, focusing particularly on real-time operation. VTS adaptively creates a TDMA arrangement with a number of timeslots equal to the actual number of nodes in range. Thus, VTS achieves an optimal throughput performance compared to TDMA protocols with fixed size of frame. The frame is set up and maintained by a distributed procedure, which allows sensors to asynchronously join and leave the frame. In addition, duty cycle is increased or decreased in order to keep latency constant below a given deadline. Therefore, a major advantage of VTS is that it guarantees a bounded latency, which allows soft real-time applications.
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