Performance Analysis of IEEE 802.15.4/Zigbee Standard Under Real Time Constraints
Lamia Chaari Fourati, Lotfi Kamoun · International journal of Computer Networks & Communications · 2011
In recent years, very interesting researches are concentrated to develop several protocols for Wireless sensor networks (WSN) and to explore WSN in various scenarios.The standardization of the IEEE 802.15.4 protocol as a flexible communication solution for low-rate wireless sensor networks leads to the widespread deployment of this technology in many potential applications with different requirements especially in industrial automation.The IEEE 802.15.4 specifies physical and media access control layers that could be optimized to ensure low-power consumption and to guarantee real-time constraints by using its guaranteed time slot (GTS) mechanism and enabling Beacon mode.Our focus in this paper is on real-time capabilities and reliability.We analyzed and compared the performance of the IEEE 802.15.4 standard using OMNET++ Simulator.Among the objectives of our study is to outline which degree the standard accomplish real time requirements.Different application scenarios were been evaluated.The analysis gives a full understanding of the behavior of the IEEE 802.15.4 access mechanism concerning data delivery delay, goodput, throughput and packet errors rate metrics.We have focused on single sink scenarios and we have analyzed some network performance according to nodes number.Our simulation results pave the way for an efficient dimensioning and deploying of an IEEE 802.15.4 cluster.