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Random Access Protocols for Massive MIMO
Aalborg University, Denmark.
Linköping University, Department of Electrical Engineering, Communication Systems. Linköping University, Faculty of Science & Engineering.
Aalborg University, Denmark.
Aalborg University, Denmark.
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2017 (English)In: IEEE Communications Magazine, ISSN 0163-6804, E-ISSN 1558-1896, Vol. 55, no 5, 216-222 p.Article in journal (Refereed) Published
Abstract [en]

5G wireless networks are expected to support new services with stringent requirements on data rates, latency and reliability. One novel feature is the ability to serve a dense crowd of devices, calling for radically new ways of accessing the network. This is the case in machine-type communications, but also in urban environments and hotspots. In those use cases, the high number of devices and the relatively short channel coherence interval do not allow per-device allocation of orthogonal pilot sequences. This article addresses the need for random access by the devices to pilot sequences used for channel estimation, and shows that Massive MIMO is a main enabler to achieve fast access with high data rates, and delay-tolerant access with different data rate levels. Three pilot access protocols along with data transmission protocols are described, fulfilling different requirements of 5G services.

Place, publisher, year, edition, pages
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC , 2017. Vol. 55, no 5, 216-222 p.
National Category
Communication Systems
Identifiers
URN: urn:nbn:se:liu:diva-138264DOI: 10.1109/MCOM.2017.1600477CMISI: 000401428800031OAI: oai:DiVA.org:liu-138264DiVA: diva2:1109122
Note

Funding Agencies|Horizon project FANTASTIC-5G [ICT-671660]; EU FP7 project MAMMOET [ICT-619086]

Available from: 2017-06-13 Created: 2017-06-13 Last updated: 2017-06-13

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