Performance comparison of GTS mechanism enabled IEEE 802.15.4 based Wireless Sensor Networks using LAR and DYMO protocol

Wireless Sensor Networks (WSNs) are an emerging field of engineering with various applications. The motivation is due to the low power and small size sensor nodes used in the network. It has started to emerge as the next generation wireless standard for Low-Rate Wireless Personal Area Networks (LRWPAN). The IEEE 802.15.4 standard is adopted as a communication protocol for LR-WPAN which supports low data rate, less power consumption and short transmission distance. IEEE 802.15.4 is the basis for the Zigbee enabled WSNs. IEEE and ZigBee alliance have joined hands to develop a complete specification of protocol stack for 802.15.4. The Guaranteed Time Slot (GTS) mechanism provided by IEEE 802.15.4 standard allocates specific time slots to all nodes in the network and makes communication more consistent. This consistency makes the network to enhance their performance. In this paper, the performance analysis of GTS mechanism enabled IEEE 802.15.4 based wireless sensor networks using various routing protocols is done by using QualNet. Performance metrics such as packet delivery ratio, delay and packets dropped of IEEE 802.15.4 based wireless sensor networks are analysed using Location Aided Routing (LAR) protocol. Then the performance metrics are then compared with that of DYnamic MANET On-Demand (DYMO) routing protocol.