Generalized Multiway Relay Network: Proposition and Effective Rate Analysis

Main Article Content

Marcio Henrique Doniak
Richard Demo Souza
Bartolomeu F. Uchôa Filho


A multiway relay network (mRN), which is widely employed in the literature, is extended to represent a larger number of practical scenarios, such as a vehicular ad hoc network (VANET). For the proposed system, generalized multiway relay network (g-mRN), three transmission strategies are presented and analyzed in terms of effective rate, for different numbers of users. Assuming that the average signal-to-noise ratio (SNR) is known to the transmitters, the maximum effective rate is obtained through the optimal choice of the message rates. We also derive the effective rate for fixed message rates. Numerical results show that the best strategy under the optimal message rates is the one in which all users transmit simultaneously in the multiple access phase. But when considering  fixed message rates, the  best transmission strategy depends upon the SNR. These results are important in that they can be used as guidelines for selecting the right strategy and  message rates depending on the situation.

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How to Cite
Doniak, M. H., Souza, R. D., & Uchôa Filho, B. F. (2018). Generalized Multiway Relay Network: Proposition and Effective Rate Analysis. Journal of Communication and Information Systems, 33(1).
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Author Biographies

Marcio Henrique Doniak, Area of Telecommunications, Campus São José, Federal Institute of Santa Catarina, São José - SC, 88103310, Brazil

Marcio Henrique Doniak was born in Florianópolis - SC, Brazil, in 1979. After enjoying the RWTHAachen University, in Germany, for a one-year internship in September 2001, he got the B.Sc. and M.Sc. degrees from Federal University of Santa Catarina (UFSC), Florianópolis, in 2003 and 2006. From 2003 to 2004, he worked at the P&D of the Certi Foundation with image processing. Later, from 2004 to 2008 worked with signal processing for cordless phone development and PBX at Intelbras' P&D, and since 2009 he is professor of the  Telecommunications Area at Federal Institute of Santa Catarina (IFSC). As a doctoral student of Electrical Engineering at UFSC, his research interests involves wireless communication and signal processing.

Richard Demo Souza, Department of Electrical Engineering, Federal University of Santa Catarina

Richard Demo Souza was born in Florianópolis-SC, Brazil. He received the B.Sc. and the D.Sc. degrees in Electrical Engineering from the Federal University of Santa Catarina (UFSC), Brazil, in 1999 and 2003, respectively. In 2003 he was a Visiting Researcher in the Department of Electrical and Computer Engineering at the University of Delaware, USA. From 2004 to 2016 he was with the Federal University of Technology Paraná (UTFPR), Brazil. Since 2017 he has been with the Federal University of Santa Catarina (UFSC), Brazil, where he is an Associate Professor. His research interests are in the areas of wireless communications and signal processing. He is a Senior Member of the IEEE and of the Brazilian Telecommunications Society (SBrT), and has served as Editor-in-Chief of the SBrT Journal of Communication and Information Systems; and Associate Editor for the IEEE Communications Letters, the EURASIP Journal on Wireless Communications and Networking, and the IEEE Transactions on Vehicular Technology. He is a co-recipient of the 2014 IEEE/IFIP Wireless Days Conference Best Paper Award, the supervisor of the awarded Best PhD Thesis in Electrical Engineering in Brazil in 2014, and a co-recipient of the 2016 Research Award from the Cuban Academy of Sciences.

Bartolomeu F. Uchôa Filho, Department of Electrical Engineering, Federal University of Santa Catarina

\textbf{Bartolomeu F. Uch\^oa-Filho} (S'94 - M'96 - SM'12) was born in Recife, Brazil, in 1965. He received the B.S.E.E. degree from the Federal University of Pernambuco (UFPE), Recife, Brazil, in 1989; the M.S.E.E. degree from the State University of Campinas (UNICAMP), Campinas, Brazil, in 1992; and the Ph.D. degree in electrical engineering from the University of Notre Dame, Notre Dame, Indiana, U.S.A., in 1996.

During 1997-1999, he held a Postdoctoral position at the State University of Campinas. From August 1999 to January 2000 he was a Visiting Researcher in the Department of Electrical Engineering, Federal University of Santa Catarina, Florian\'opolis, Brazil. Since February 2000 he has been with the same Department, where he is a Full Professor. From March 2009 to February 2010, he was a Post-Doctoral Fellow at the University of Sydney, Australia. From April to June 2017, he had a joint appointment as Senior Research Fellow in the \textit{Laboratoire des Signaux et Syst\`emes} (L2S), \textit{Centrale-Sup\'elec}, and in the \textit{Laboratoire de Traitement du Signal et Architectures \'Electroniques} (LAETITIA), \textit{Conservatoire National des Arts et M\'etiers} (CNAM), both in France. His research interests are in the area of coding and information theory, with applications to digital communications systems.

Dr. Uch\^oa-Filho is an IEEE Senior Member, a Senior Member of the Brazilian Telecommunications Society (SBrT), a member of Eta Kappa Nu, the IEEE Information Theory Society, the IEEE Communications Society, and the ARC Communications Research Network (ACoRN, Australia). For the 2003-2004 period, he served as the Editor-in-Chief for the Journal of the Brazilian Telecommunications Society. During 2011-2014, he was an Associate Editor of Information and Coding Theory for the Journal of Communication and Information Systems (JCIS). Since 2016 he has been an Associate Editor of Physical Communication (Elsevier) and Digital Signal Processing (Elsevier). He was the Technical Program Committee Co-Chair of the 27th Brazilian Telecommunications Symposium (SBrT'09), the Track-Chair of the Information Theory and Coding Track of the 2014 IEEE/SBrT International Telecommunications Symposium (ITS'14), and has also served as TPC member of several national and international symposia. He is a Productivity Researcher (Level 1C) of the CNPq (the Brazilian National Council for Scientific and Technological Development, Ministry of Science and Technology).