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Relaying and Wireless Network Coding
Aalborg University.ORCID iD: 0000-0002-5478-5531
KTH, School of Electrical Engineering (EES), Signal Processing. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.ORCID iD: 0000-0002-3599-5584
University of Bremen.
University of Bremen.
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2016 (English)In: 5g Mobile and Wireless Communications Technology / [ed] Afif Osseiran, Jose F. Monserrat, Patrick Marsch, Cambridge University Press, 2016, 277-302 p.Chapter in book (Other academic)
Abstract [en]

Relaying and network coding are powerful techniques that improve the performance of a cellular network, for example by extending the network coverage, by increasing the system capacity or by enhancing the wireless link reliability. This chapter focuses on relaying and wireless network coding in 5G. After reviewing the history of relaying, the key envisioned scenarios for relaying in 5G are highlighted, namely the provisioning of wireless backhaul in Ultra-Dense Networks (UDNs), for nomadic cells or for data aggregation in the context of massive machine-type communications. While full-duplex technology is slowly gaining maturity, it is expected that due to complexity reasons most relaying scenarios in 5G will be based on half-duplex devices. Therefore, finding solutions to overcome the half-duplex limitation remains critical. The chapter describes the following three key innovations for efficient half-duplex relaying:

• By applying the principles of wireless network coding to distributed multi-way traffic, in-band relaying becomes a spectrally efficient solution for wireless backhaul in ultra-dense networks of small cells, despite conventional views.

• Non-orthogonal multiple access techniques, as required by physical-layer network coding, are essential for increased spectral efficiency when simultaneous multi-flows are exchanged through a same relay. Here, Interleave-Division Multiple-Access (IDMA) is put forward for its ability to support flexible rate requirements.

• Buffer-aided relaying is featured where different ways to exploit buffering are described for improved diversity and increased rates. This technique targets delay tolerant applications having high data rate requirements.

Place, publisher, year, edition, pages
Cambridge University Press, 2016. 277-302 p.
National Category
Communication Systems
Research subject
Electrical Engineering
URN: urn:nbn:se:kth:diva-197384DOI: 10.1017/CBO9781316417744.011ISBN: 9781316417744OAI: diva2:1052098
EU, FP7, Seventh Framework Programme, 317669

QC 20161208

Available from: 2016-12-05 Created: 2016-12-05 Last updated: 2016-12-08Bibliographically approved

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