Open AccessDirectional antenna‐based single channel full duplex
Author(s) -
Zhou Zhengjuan,
Zhang Xing
Publication year - 2015
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2014.1153
Subject(s) - computer science , wireless , throughput , duplex (building) , computer network , wireless network , channel (broadcasting) , electronic engineering , telecommunications , engineering , dna , biology , genetics
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.