ABSTRACT

The IEEE 802.15.4/Zigbee protocol stack has been considered as a promising technology for Wireless Sensor Networks (WSN). IEEE 802.15.4 Low-Rate Wireless Personal Area Network (WPAN) standard specifies the lower protocol layers—the physical layer (PHY), and the media access control (MAC) portion of the data link layer (DLL) and Network layer(NWK) Wireless sensor network provide the low rate, wireless interconnection of ultra low cost sensor/actuator devices to enable the cyber world to sense and affect the real physical environment. The IEEE 802.15.4/Zigbee protocol stack provide selectable levels of security using AES-128 mechanism for privacy, sender authentication, message integrity. It uses fully handshake protocol for transfer reliability. In business applications where WSN are applied, failures in essential parts of the sensor network must be efficiently detected and automatically recovered. ZigBee is targeted at radio-frequency (RF) applications that require a low data rate, long battery life, and secure networking.This paper will analyze the adaptability features of IEEE802.15.4[3] at Physical, MAC and Network layer and various mode of operation at MAC layer.