Resource Allocation in Wireless Powered Communication Networks With Non-Orthogonal Multiple Access

In this letter, we propose a non-orthogonal multiple access (NOMA) scheme for the uplink of wireless powered communication networks (WPCNs). In order to tackle the doubly near-far effect in WPCNs, the decoding order of the compound information signal received at the base station (BS) is set to be an...

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Bibliographic Details
Published in:IEEE wireless communications letters 2016-12, Vol.5 (6), p.684-687
Main Authors: Chingoska, Hristina, Hadzi-Velkov, Zoran, Nikoloska, Ivana, Zlatanov, Nikola
Format: Article
Language:English
Subjects:
Communication networks
Communications networks
Decoding
Energy harvesting
Fading channels
NOMA
non-orthogonal multiple access
Nonorthogonal multiple access
Resource allocation
Resource management
Time Division Multiple Access
Uplink
Wireless communication
Wireless communications
Wireless networks
Wireless power transmission
wireless powered communication networks
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Summary:In this letter, we propose a non-orthogonal multiple access (NOMA) scheme for the uplink of wireless powered communication networks (WPCNs). In order to tackle the doubly near-far effect in WPCNs, the decoding order of the compound information signal received at the base station (BS) is set to be an inverse of the distances between the energy harvesting users (EHU) and the BS. For the proposed scheme, we derive jointly optimal allocations of the BS transmit power and the durations of the energy harvesting and information transmission phases, such that the rate region is maximized. Compared to NOMA schemes with fixed BS transmit power, the proposed scheme achieves notably higher rates, while maintaining high level of system fairness. Compared to time-division multiple access schemes, our scheme leads to significant rate enhancement of cell-edge EHUs, thus improving system fairness.
ISSN:2162-2337
2162-2345
DOI:10.1109/LWC.2016.2615616