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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.
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