Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.22/4045
Título: A comprehensive simulation study of slotted CSMA/CA for IEEE 802.15.4 wireless sensor networks
Autor: Koubâa, Anis
Alves, Mário
Tovar, Eduardo
Data: 2006
Editora: IEEE
Relatório da Série N.º: Factory Communication Systems;
Resumo: In this paper, we analyze the performance limits of the slotted CSMA/CA mechanism of IEEE 802.15.4 in the beacon-enabled mode for broadcast transmissions in WSNs. The motivation for evaluating the beacon-enabled mode is due to its flexibility for WSN applications as compared to the non-beacon enabled mode. Our analysis is based on an accurate simulation model of the slotted CSMA/CA mechanism on top of a realistic physical layer, with respect to the IEEE 802.15.4 standard specification. The performance of the slotted CSMA/CA is evaluated and analyzed for different network settings to understand the impact of the protocol attributes (superframe order, beacon order and backoff exponent) on the network performance, namely in terms of throughput (S), average delay (D) and probability of success (Ps). We introduce the concept of utility (U) as a combination of two or more metrics, to determine the best offered load range for an optimal behavior of the network. We show that the optimal network performance using slotted CSMA/CA occurs in the range of 35% to 60% with respect to an utility function proportional to the network throughput (S) divided by the average delay (D).
Peer review: yes
URI: http://hdl.handle.net/10400.22/4045
ISBN: 1-4244-0379-0
Versão do Editor: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=1704149
Aparece nas colecções:ISEP – CISTER – Comunicações em eventos científicos

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