Directional antenna-based single channel full duplex

Single-channel full-duplex (SCFD) radio has recently gained significant attention. It can not only double link throughput, but also provide the capability to solve a few challenging problems in half-duplex wireless systems, including hidden terminals, loss of throughput due to congestion, and large...

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Bibliographic Details
Published in:IET communications 2015-11, Vol.9 (16), p.1999-2006
Main Authors: Zhou, Zhengjuan, Zhang, Xing
Format: Article
Language:English
Subjects:
access protocols
Antennas
Channels
differential‐localisation MAC
directive antennas
DL‐MAC
full‐duplex communication
half‐duplex wireless systems
Links
MAC protocol
Mathematical models
medium access control protocol
MIMO communication
multiple‐input multiple‐output
Networks
numerical analysis
omnidirectional antenna
omnidirectional antennas
Prototypes
Radio
radiocommunication
receive antennas
receiving antennas
SCFD radio
single channel full duplex
transmit antennas
transmitting antennas
wireless network
Wireless networks
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Summary:Single-channel full-duplex (SCFD) radio has recently gained significant attention. It can not only double link throughput, but also provide the capability to solve a few challenging problems in half-duplex wireless systems, including hidden terminals, loss of throughput due to congestion, and large end-to-end delays. Recent works on SCFD have achieved full-duplex communication and claimed to have solved the aforementioned problems. However, when applied to a wireless network consisting of more than three nodes, they fail to solve these problems. One can conclude through analysis that, SCFD with omni-directional antenna as both transmit and receive antennas is inherently incapable of solving these problems. In this study, the authors propose a directional antenna-based solution of SCFD architecture, including a new SCFD radio prototype and a new medium access control (MAC) protocol [differential localization MAC (DL-MAC)] for wireless networks. Experiments on real nodes verify the authors' solution and their radio prototype achieves up to 93% link through put gain over half-duplex system. Numerical simulations show that the network capacity of their solution can be increased by nearly 200%, compared to a half-duplex system in a large-scale wire less network.
ISSN:1751-8628
1751-8636
1751-8636
DOI:10.1049/iet-com.2014.1153