On the performance of asynchronous TCP connections to Wireless Sensor Network over WiFi

With Internet of Things (IoT) vision, computing systems get the ubiquity of real world. Wireless Sensor Network (WSN) technology plays a critical role for the construction of this paradigm. Reliable communication between WSN nodes and outside Internet entities will be needed for remote management of Internet Objects. On the other hand, low bandwith, high delay and packet error rates of the underlying wireless medium can make the realization of such TCP connections highly inefficient. In this study, we investigate the performance of asynchronous TCP connections from multiple WiFi clients to a sensor node on WSN. We model the traffic over WSN gateway as M/M/1 queue and present the results of comprehensive simulation tests for performance of TCP connections in terms of throughput and end-to-end delay. The results reveal that the gateway can achieve reasonable Round Trip Times up to 80 simultaneous connections to WSN when WiFi Packet Error Rate is less than 0.2.