High-Efficiency Device Positioning and Location-Aware Communications in Dense 5G Networks

Mike Koivisto, Aki Hakkarainen, Mário Costa, Petteri Kela, Kari Leppänen, Mikko Valkama

Research output: Contribution to journalArticleScientificpeer-review

108 Citations (Scopus)


In this article, the prospects and enabling technologies for high-efficiency device positioning and location-aware communications in emerging 5G networks are reviewed. We will first describe some key technical enablers and demonstrate by means of realistic ray-tracing and map based evaluations that positioning accuracies below one meter can be achieved by properly fusing direction and delay related measurements on the network side, even when tracking moving devices. We will then discuss the possibilities and opportunities that such high-efficiency positioning capabilities can offer, not only for location-based services in general, but also for the radio access network itself. In particular, we will demonstrate that geometric location-based beamforming schemes become technically feasible, which can offer substantially reduced reference symbol overhead compared to classic full channel state information (CSI)-based beamforming. At the same time, substantial power savings can be realized in future wideband 5G networks where acquiring full CSI calls for wideband reference signals while location estimation and tracking can, in turn, be accomplished with narrowband pilots.

Original languageEnglish
Article number7984759
Pages (from-to)188-195
Number of pages8
JournalIEEE Communications Magazine
Issue number8
Publication statusPublished - 18 Jul 2017
MoE publication typeA1 Journal article-refereed


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