A wireless sensor networks MAC protocol for real-time applications

被引：21

作者：

Egea-Lopez, E. ^{[1
]}

Vales-Alonso, J. ^{[1
]}

Martinez-Sala, A. S. ^{[1
]}

Garcia-Haro, J. ^{[1
]}

Pavon-Marino, P. ^{[1
]}

Bueno Delgado, M. V. ^{[1
]}

机构：

[1] Polytech Univ Cartagena, Dept Informat Technol & Commun, Cartagena, Spain

来源：

PERSONAL AND UBIQUITOUS COMPUTING | 2008年 / 12卷 / 02期

关键词：

wireless sensor networks; MAC protocols; real-time applications;

D O I：

10.1007/s00779-006-0111-6

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

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.

引用

页码：111 / 122

页数：12

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