Transmit power minimisation for full-duplex two-way relaying systems with asymmetric packet-rates and quality-of-service requirements

This study solves the transmit power minimisation problem subject to a target quality-of-service constraint of a full-duplex (FD) two-way decode-and-forward relaying system with asymmetric packet-rates, where the two-way relaying system can operate in two different styles, i.e. half-duplex sources w...

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Bibliographic Details
Published in:IET communications Vol. 14; no. 13; pp. 2098 - 2109
Main Authors: Qian, Chong, Ji, Xiaodong, Cao, Zhanghua, Li, Wenhua
Format: Journal Article
Language:English
Published: The Institution of Engineering and Technology 11.08.2020
Subjects:
asymmetric packet‐rates
decode and forward communication
FDS‐FDR style
FDS‐FDR‐PNC style
FDS‐FDR‐PSC style
full‐duplex relaying styles
full‐duplex sources
full‐duplex two‐way decode‐and‐forward relaying system
half‐duplex sources
HDS‐FDR
individual transmit power
network coding
optimum power control techniques
physical‐layer network coding
physical‐layer superposition coding
power control
quality of service
quality‐of‐service requirements
relay networks (telecommunication)
relay node
Research Article
target quality‐of‐service constraint
telecommunication control
transmit power minimisation problem subject
FDS-FDR-PNC style
network coding
physical-layer network coding
optimum power control techniques
telecommunication control
individual transmit power
full-duplex sources
quality of service
FDS-FDR-PSC style
full-duplex relaying styles
full-duplex two-way decode-and-forward relaying system
decode and forward communication
HDS-FDR
FDS-FDR style
physical-layer superposition coding
relay node
quality-of-service requirements
half-duplex sources
transmit power minimisation problem subject
target quality-of-service constraint
power control
asymmetric packet-rates
relay networks (telecommunication)
ISSN:1751-8628, 1751-8636
Online Access:Get full text
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Summary:This study solves the transmit power minimisation problem subject to a target quality-of-service constraint of a full-duplex (FD) two-way decode-and-forward relaying system with asymmetric packet-rates, where the two-way relaying system can operate in two different styles, i.e. half-duplex sources with full-duplex relaying (HDS-FDR) and full-duplex sources with full-duplex relaying (FDS-FDR) styles. For the FDS-FDR style, the relay node can use two strategies to handle the received signals from the sources, namely, physical-layer network coding (PNC) and physical-layer superposition coding (PSC), both of which are referred to as FDS-FDR-PNC and FDS-FDR-PSC styles, respectively. By transforming the transmit power minimisation problem into a two-stage problem, optimum power control (OPC) techniques are developed for the HDS-FDR, FDS-FDR-PNC and FDS-FDR-PSC styles, respectively, giving closed-form solutions for individual transmit power at the relay and the sources. Computer simulations are conducted and the results validate the proposed OPC techniques. It is shown that the FDS-FDR-PNC style performs best in terms of energy saving when the two sources' packet-rates are moderately asymmetric or symmetric. For the case that the packet-rates are strongly asymmetric, the FDS-FDR-PSC style can save more energy than the other two styles.
ISSN:1751-8628
1751-8636
DOI:10.1049/iet-com.2019.0644