Asian Journal of Engineering, Sciences and Technology - Volume 4, Issue 2 2014
By Sanam Memon, Wanod Kumar
Keywords: delay, earthquake, queuing, utilization, WSN
In this paper performance analysis of WSN based earthquake monitoring system is carried out using queuing theory. Queuing Theory has been used as an analyzing tool for any communication system. The WSN nodes transmit their data packets (obtained from the ground motion as input) to the centralized node/server which subsequently forwards the incoming data packets to the main station using backhaul link. While evaluating the performance, in this study we have considered two scenarios. In first scenario, the modeling of wireless channel (present between nodes and centralized node) is not taken into account, whereas in second scenario the wireless channel is modeled as M/M/c queue. Here both M/M/1 and M/M/c queues are used to model the system. The performance analysis is carried out in terms of two Quality of Service (QoS) parameters namely mean system delay and utilization. The analytical results show that delay increases with the increase in the number of nodes in the system (i.e. the increase in the traffic intensity). Utilization of the system however is the linear function of the traffic intensity. While employing real time scenario, it is necessary that number of WSN nodes must be according to need so that mean system delay can be minimized and warning for the earthquake can be generated on time. Furthermore, data packets should not be increased at input, otherwise congestion (blockage) would occur. The results obtained via this research helps to improve the performance of WSN based earthquake monitoring system.