A real-time MAC protocol for wireless: Virtual TDMA for Sensor (VTS)
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AuthorEgea López, Estebán
Knowledge AreaIngeniería Telemática
Bibliographic CitationEGEA LÓPEZ, E., VALES ALONSO, J., SANTOS MARTÍNEZ, A, GARCÍA HARO, J., PAVÓN MARIÑO, P., BUENO DELGADO, V. A real-time MAC protocol for wireles: Virtual TDMA for Sensors (VTS). Lecture Notes in Computer Science, vol.3984: 382-396, 2006
Wireless Sensor Network(WSN)are designed for data gathering and processing, with particular requirements and constraints: low hardware complexity, low energy consumption,special trafic pattern suport, scalabity, and in some case, real time operation. In this paper we present the Virtual TDMA foe Sensor (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 timeslots equal to the actual number of nodes in range. Thus, VTS archives and optimal throughput performance compared to TDMA protocols with fixed size of frame. The TDMA frame is set up and maintained by a distributed procedure, which allows sensor to asynchronously join and leave the frame. A mayor advantage of VTS is that it guarantees a bounded latency, which allows soft real-time applications. An expression for the upper latency bound is also provided in this paper.VTS performance is evaluated by simulation. Results ...
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