Supporting High Data Rate Sensing Applications in Internet of Things (IoT)

Wireless sensor networks are main enabling resource for realization of Internet of Things (IoT) to access the physical world information. A number of dynamic IoT applications with dense sensor deployments generate continuous and high rate data streams. Such a sensor network pose congestion and data loss challenges due to contention near the sink and therefore needs transport layer services. In this work, we have proposed integrated congestion control scheme with reliability module at transport layer for high data rate sensor networks used in IoT environments. The proposed modules of the protocol are mainly implemented at the resourceful sink/gateway node and perform end-to-end reliable data delivery alongside proactive congestion avoidance for data collection in high data rate IoT applications. The proposed modules have been evaluated through extensive ns-2 simulations and protocol results are compared with three other well-known transport layer protocols i.e., NewReno, Westwood and ELFN. Comparative analysis of simulation results reveals that proposed protocol outperform its competitors on all selected performance measures. The end-to-end delay performance of proposed protocol is about 3 times better and its normalized control load (NCL) is less than 0.005 in comparison to 1 NCL by other sensor networks enhanced variants. Moreover, it effectively sends data packets generated by the sensing nodes with 99.85% packet delivery ratio (PDR) whereas competing protocols have 95% PDR in comparison.