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Hybrid Backscatter and Relaying Scheme for 6G Greencom IoT Networks with SWIPT
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  • Sumit Gautam ,
  • Shree Krishna Sharma ,
  • Dinh-Hieu Tran ,
  • Symeon Chatzinotas ,
  • Bjorn Ottersten
Sumit Gautam
Interdisciplinary Centre for Security, Interdisciplinary Centre for Security

Corresponding Author:[email protected]

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Shree Krishna Sharma
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Dinh-Hieu Tran
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Symeon Chatzinotas
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Bjorn Ottersten
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Abstract

In order to support the massive number of resource-constrained Internet of Things (IoT) devices and machine-type devices, it is crucial to design future beyond 5G/6G wireless networks in an energy-efficient manner. To this end, this letter proposes a novel two-hop hybrid backscatter-and-relaying scheme to facilitate simultaneous wireless information and power transfer (SWIPT) considering both the Time-Switching (TS) and Power-Splitting (PS) receiver architectures, while dynamically modelling the involved dual-hop time-period (TP) metric. An optimization problem is formulated for the joint optimization of throughput, harvested energy, and transmit power of a SWIPT-enabled system with the proposed hybrid scheme, and is solved using a nonlinear optimizer. Our numerical results in terms of weighted utility function show the superior performance of proposed hybrid scheme over backscatter-only and relay-only schemes, while also depicting their individual performance benefits over the corresponding benchmark SWIPT systems designed with the fixed-TP.