A multi-hop routing protocol in tag-to-tag networks of passive tags

Murat, Furkan
With the evolution of technology, tag-to-tag communication between passive RFID tags using backscattering, which is accepted as a milestone in RFID technology, has emerged in recent years. Different from the conventional passive RFID systems, tags could communicate with each other with the existence of RF signals in the environment. With this development, passive RFID tags evolved into passive tags because the usage areas could not be limited to the identification or tracking of attached objects. On the other hand, the communication ranges of the passive tags were limited as a consequence of having no internal power sources, such as batteries. Therefore, multi-hop communication was required to connect two passive tags that were not in their communication ranges. In this study, we proposed a novel multi-hop routing protocol with our system design for tag-to-tag networks of passive tags. We created a sectoral circular area design and placed the central controller, which was the RF signal source of the network, at the center of the circular area. Afterward, we divided the circular area into sectors by considering the communication ranges of the central controller and passive tags. To validate and test our solution, we created a simulation environment where passive tags were distributed uniform randomly in the circular area. With the assistance of the central controller, sectors determined by the designed routing algorithms were excited, and multi-hop tag-to-tag communication was achieved. By taking into account the energy requirements of the backscatter communication, our proposed routing protocol has provided an energy-efficient tag-to-tag communication among the passive tags in a multi-hop fashion.


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Citation Formats
F. Murat, “A multi-hop routing protocol in tag-to-tag networks of passive tags,” M.S. - Master of Science, Middle East Technical University, 2023.