Abstract:
Near-zero-power backscatter communication (BackCom) based on ambient stray electromagnetic waves has become a promising technique for building passive Internet of Things ...Show MoreMetadata
Abstract:
Near-zero-power backscatter communication (BackCom) based on ambient stray electromagnetic waves has become a promising technique for building passive Internet of Things (IoT). Nevertheless, BackCom is confined by both spectrum and energy availability, making it challenging to guarantee signal quality and transmission stability in unpredictable wireless environments, especially in multi-hop wireless networks. In this article, we propose a novel hybrid reflect-decode-forward (HRDF) relaying with metasurface-enhanced backscatter communication (Meta-BackCom) devices to achieve efficient forwarding in a scalable passive IoT network. Several HRDF relaying cases are then explored to enhance the robustness and capacity of Meta-BackCom networks. Furthermore, an online robust co-relay (RCoR) scheme is designed for multi-hop networks with HRDF relays, which is an online routing policy with adaptive forwarding mode and relay link decision, accounting for dynamic network environment. Numerical results reveal that the proposed RCoR with HRDF relaying strategy can significantly improve the spectrum efficiency, energy efficiency, and outage performance for multi-hop Meta-BackCom networks.
Published in: IEEE Network ( Volume: 38, Issue: 3, May 2024)