Design of Transmission Manager in Heterogeneous WSNs

The current generation of sensor networks are designed to be application-specific, thus are exposed only to a limited set of users. The emerging concept of IoT is expected to house multiple applications with diverse delay requirements. A transmission manager provides an optimal transmission time for transmitting the buffered measurements. In the literature, solutions have been proposed optimizing mainly for single sensing infrastructures. In this work, we first propose an optimal transmission manager that supports multiple applications in a single-hop wireless sensor networks. Then, we extend our solution into a distributed transmission manager to operate in multi-hop WSNs. Both transmission managers work in tandem, and determine the transmission time for every buffered measurement. We implement both solutions in ns3 and compare with other state of the art solutions. Our case studies show that our proposed solution reduces energy consumption by 75 percent compared to the state of the art approaches while having on average 12 percent less expired measurements.