Driven by the high sensing resolution provided by advanced nano technologies, Electromagnetic-based Wireless Nano Sensor Networks (EM-WNSNs) operating in the terahertz (THz) band is becoming an integral part of the Internet of Things (IoT). Data acquisition for EM-WNSNs face two challenges: the dynamic IoT backhaul bandwidth and THz channel conditions that jointly impact resource utilization efficiency. Specifically, the mismatch between the demands of the EM-WNSNs and the available bandwidth of the backhaul link reduces the bandwidth efficiency of IoT backhaul or the energy efficiency of EM-WNSNs. To address the new constraints that emerge from the EM-WNSN, an On-demand Efficient (OE) polling is proposed for the backhaul tier of EM-WNSNs which is composed of nano sinks that aggregate and transport data from nano sensors to the IoT gateway. The OE polling adjusts the packet aggregation process of nano sinks according to the up-to-date network conditions and we show that it achieves both high bandwidth efficiency for IoT backhaul and high energy efficiency for EM-WNSNs. To the best of our knowledge, OE polling is the first data acquisition scheme that connects EM-WNSNs with IoT by taking into consideration the dynamic IoT backhaul bandwidth and THz channel conditions.
['Hang Yu', 'Bryan Ng', 'Winston Khoon Guan Seah']
On-demand efficient polling for nanonetworks under dynamic IoT backhaul network conditions