Optimal Time Switching-Based Policies for Efficient Transmit Power in Wireless Energy Harvesting Small Cell Cognitive Relaying Networks

In this paper, we consider a half-duplex decode-and-forward small cell cognitive relay network, in which the source and the relay node are allocated with spectrum shared by the macro cell primary transmitter (MPT). In order to develop a practical design, we propose two time switching-based policies...

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Bibliographic Details
Published in:Wireless personal communications 2018-04, Vol.99 (4), p.1605-1624
Main Authors: Nguyen, Hoang-Sy, Nguyen, Thanh-Sang, Nguyen, Minh-Tung, Voznak, Miroslav
Format: Article
Language:English
Subjects:
Communications Engineering
Computer Communication Networks
Computer simulation
Data transmission
Energy harvesting
Energy policy
Energy transmission
Engineering
Networks
Optimization
Relay
Relaying
Signal,Image and Speech Processing
Switching theory
Wireless networks
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Summary:In this paper, we consider a half-duplex decode-and-forward small cell cognitive relay network, in which the source and the relay node are allocated with spectrum shared by the macro cell primary transmitter (MPT). In order to develop a practical design, we propose two time switching-based policies to optimize the maximum transmit power at source and relay so-called Optimal Time for Transmit Power at Source and Optimal Time for Transmit Power at Relay related to wireless energy harvesting for the considered network, thanks to the advantages of MPT. Additionally, we provide closed-form expressions for outage probability for the proposed policies. Furthermore, to achieve more genuine understandings of the successful data transmission of the small cells, we also consider the delay-constraint throughput, the rate-energy trade-off and the average energy efficiency by giving numerical and simulation results.
ISSN:0929-6212
1572-834X
DOI:10.1007/s11277-018-5296-2