Queue Size Trade Off with Modulation in 802.15.4 for Wireless Sensor Networks

In this paper we analyze the performance of 802.15.4 Wireless Sensor Network (WSN) and derive the queue size trade off for different modulation schemes like: Minimum Shift Keying (MSK), Quadrature Amplitude Modulation of 64 bits (QAM_64) and Binary Phase Shift Keying (BPSK) at the radio transmitter of different types of devices in IEEE 802.15.4 for WSN. It is concluded that if queue size at the PAN coordinator of 802.15.4 wireless sensor network is to be taken into consideration then QAM_64 is recommended. Also it has been concluded that if the queue size at the GTS or Non GTS end device is to be considered then BPSK should be preferred. Our results can be used for planning and deploying IEEE 802.15.4 based wireless sensor networks with specific performance demands. Overall it has been revealed that there is trade off for using various modulation schemes in WSN devices.