Figure: Sensing energy efficiency and multihop RF energy transfer experiments at IIT Delhi

Figure: Field studies on pollution measurements and mapping at IIT Hyderabad

The aim of the project was to create a long-lived pollution monitoring wireless sensor network by integrating wake-up radios and energy harvesting technology, so that nodes can be woken up by directed queries over large distances. The collaborative research partners in the project: IIT Delhi (IITD), IIT Hyderabad (IITH), Northeastern University, USA (NU), and University of Rochester, USA (UR).
A few novel methods, namely multi-hop RF energy transfer, simplified and energy-efficient range-based and ID-based wakeup schemes, and pollution map creation based on real field pollution data, have been proposed and experimentally demonstrated. The key tasks performed:

1. Energy harvesting circuit development, integrate wakeup radio and energy harvesting modules (NU, UR)
2. Intra-node energy models; proof-of-concept of novel multi-hop RF energy transfer (IITD)
3. Adaptation of MAC and routing protocols; integration of NU’s harvester circuit, fine-tuning multihop RF energy transfer and wake-up (IITD, NU, UR)
4. Path planning for data MULEs; (UR, IITD, NU)
5. Data modeling and device calibration, localization of pollution causing entity (IITH, IITD)
6. Localization of pollution causing entity (IITH, NU)
7. Integrated testbed experiments, field deployment sensing/data-collection, integration of specialized circuits (IITH, IITD, UR, NU)