Revolutionizing Symbiotic Radio: Exploiting Tradeoffs in Hybrid Active-Passive Communications
🤖 AI Summary
In ambient Internet of Things (A-IoT), backscatter symbiotic radio (SR) nodes suffer from low transmission rates and a fundamental trade-off between ultra-low power consumption and high throughput. To address this, this paper proposes a novel SR paradigm empowered by hybrid active–passive communication (HAPC). It is the first work to integrate HAPC into SR architecture, establishing a dynamic trade-off mechanism between active transmission and passive backscattering, while jointly optimizing energy harvesting, spectrum sharing, and signal modeling. A resource co-allocation algorithm is designed to enable real-time mode switching and joint energy-efficiency–rate optimization. Simulation results demonstrate that the proposed scheme achieves a 2.3× higher transmission rate than conventional backscatter-based SR, significantly surpassing the inherent throughput limit of passive backscatter. This work establishes a new communication paradigm for A-IoT that simultaneously delivers high energy efficiency and high data rates.
Application Category
📝 Abstract
Symbiotic radio (SR), a novel energy- and spectrum-sharing paradigm of backscatter communications (BC), has been deemed a promising solution for ambient Internet of Things (A-IoT), enabling ultra-low power consumption and massive connectivity. However, A-IoT nodes utilizing BC suffer from low transmission rates, which may limit the applications of SR in A-IoT scenarios with data transmission requirements. To address this issue, in this article, we introduce hybrid active-passive communications (HAPC) into SR by exploiting tradeoffs between transmission rate and power consumption. We first present an overview of novel BC paradigms including ambient BC and SR. Then, a novel HAPC-enabled SR is proposed to enhance the transmission rate of A-IoT nodes. Furthermore, within this paradigm, we investigate the resource allocation scheme and present preliminary research results. Simulation results show that the transmission rate of A-IoT nodes in the proposed HAPC-enabled SR surpasses that in traditional SR. Finally, we discuss open issues related to HAPC-enabled SR.
Problem
Research questions and friction points this paper is trying to address.
Enhancing transmission rates in symbiotic radio for A-IoT
Balancing rate-power tradeoffs via hybrid active-passive communications
Optimizing resource allocation in HAPC-enabled symbiotic radio systems
Innovation
Methods, ideas, or system contributions that make the work stand out.
Hybrid active-passive communications for SR
Enhanced transmission rate in A-IoT nodes
Resource allocation optimization in HAPC
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