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Joint Device Positioning and Clock Synchronization in 5G Ultra-Dense Networks

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Joint Device Positioning and Clock Synchronization in 5G Ultra-Dense Networks. / Koivisto, Mike; Costa, Mario Jorge; Werner, Janis; Heiska, Kari; Talvitie, Jukka; Leppänen, Kari; Koivunen, Visa; Valkama, Mikko.

In: IEEE Transactions on Wireless Communications, Vol. 16, No. 5, 05.2017, p. 2866-2881.

Research output: Contribution to journalArticleScientificpeer-review

Harvard

Koivisto, M, Costa, MJ, Werner, J, Heiska, K, Talvitie, J, Leppänen, K, Koivunen, V & Valkama, M 2017, 'Joint Device Positioning and Clock Synchronization in 5G Ultra-Dense Networks', IEEE Transactions on Wireless Communications, vol. 16, no. 5, pp. 2866-2881. https://doi.org/10.1109/TWC.2017.2669963

APA

Koivisto, M., Costa, M. J., Werner, J., Heiska, K., Talvitie, J., Leppänen, K., ... Valkama, M. (2017). Joint Device Positioning and Clock Synchronization in 5G Ultra-Dense Networks. IEEE Transactions on Wireless Communications, 16(5), 2866-2881. https://doi.org/10.1109/TWC.2017.2669963

Vancouver

Koivisto M, Costa MJ, Werner J, Heiska K, Talvitie J, Leppänen K et al. Joint Device Positioning and Clock Synchronization in 5G Ultra-Dense Networks. IEEE Transactions on Wireless Communications. 2017 May;16(5):2866-2881. https://doi.org/10.1109/TWC.2017.2669963

Author

Koivisto, Mike ; Costa, Mario Jorge ; Werner, Janis ; Heiska, Kari ; Talvitie, Jukka ; Leppänen, Kari ; Koivunen, Visa ; Valkama, Mikko. / Joint Device Positioning and Clock Synchronization in 5G Ultra-Dense Networks. In: IEEE Transactions on Wireless Communications. 2017 ; Vol. 16, No. 5. pp. 2866-2881.

Bibtex - Download

@article{382149ce3bd94192be56cbfce0c822db,
title = "Joint Device Positioning and Clock Synchronization in 5G Ultra-Dense Networks",
abstract = "In this paper, we address the prospects and key enabling technologies for highly efficient and accurate device positioning and tracking in fifth generation (5G) radio access networks. Building on the premises of ultra-dense networks as well as on the adoption of multicarrier waveforms and antenna arrays in the access nodes (ANs), we first formulate extended Kalman filter (EKF)-based solutions for computationally efficient joint estimation and tracking of the time of arrival (ToA) and direction of arrival (DoA) of the user nodes (UNs) using uplink reference signals. Then, a second EKF stage is proposed in order to fuse the individual DoA and ToA estimates from one or several ANs into a UN position estimate. Since all the processing takes place at the network side, the computing complexity and energy consumption at the UN side are kept to a minimum. The cascaded EKFs proposed in this article also take into account the unavoidable relative clock offsets between UNs and ANs, such that reliable clock synchronization of the access-link is obtained as a valuable by-product. The proposed cascaded EKF scheme is then revised and extended to more general and challenging scenarios where not only the UNs have clock offsets against the network time, but also the ANs themselves are not mutually synchronized in time. Finally, comprehensive performance evaluations of the proposed solutions on a realistic 5G network setup, building on the METIS project based outdoor Madrid map model together with complete ray tracing based propagation modeling, are provided. The obtained results clearly demonstrate that by using the developed methods, sub-meter scale positioning and tracking accuracy of moving devices is indeed technically feasible in future 5G radio access networks operating at sub-6 GHz frequencies, despite the realistic assumptions related to clock offsets and potentially even under unsynchronized network elements.",
author = "Mike Koivisto and Costa, {Mario Jorge} and Janis Werner and Kari Heiska and Jukka Talvitie and Kari Lepp{\"a}nen and Visa Koivunen and Mikko Valkama",
year = "2017",
month = "5",
doi = "10.1109/TWC.2017.2669963",
language = "English",
volume = "16",
pages = "2866--2881",
journal = "IEEE Transactions on Wireless Communications",
issn = "1536-1276",
publisher = "Institute of Electrical and Electronics Engineers",
number = "5",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Joint Device Positioning and Clock Synchronization in 5G Ultra-Dense Networks

AU - Koivisto, Mike

AU - Costa, Mario Jorge

AU - Werner, Janis

AU - Heiska, Kari

AU - Talvitie, Jukka

AU - Leppänen, Kari

AU - Koivunen, Visa

AU - Valkama, Mikko

PY - 2017/5

Y1 - 2017/5

N2 - In this paper, we address the prospects and key enabling technologies for highly efficient and accurate device positioning and tracking in fifth generation (5G) radio access networks. Building on the premises of ultra-dense networks as well as on the adoption of multicarrier waveforms and antenna arrays in the access nodes (ANs), we first formulate extended Kalman filter (EKF)-based solutions for computationally efficient joint estimation and tracking of the time of arrival (ToA) and direction of arrival (DoA) of the user nodes (UNs) using uplink reference signals. Then, a second EKF stage is proposed in order to fuse the individual DoA and ToA estimates from one or several ANs into a UN position estimate. Since all the processing takes place at the network side, the computing complexity and energy consumption at the UN side are kept to a minimum. The cascaded EKFs proposed in this article also take into account the unavoidable relative clock offsets between UNs and ANs, such that reliable clock synchronization of the access-link is obtained as a valuable by-product. The proposed cascaded EKF scheme is then revised and extended to more general and challenging scenarios where not only the UNs have clock offsets against the network time, but also the ANs themselves are not mutually synchronized in time. Finally, comprehensive performance evaluations of the proposed solutions on a realistic 5G network setup, building on the METIS project based outdoor Madrid map model together with complete ray tracing based propagation modeling, are provided. The obtained results clearly demonstrate that by using the developed methods, sub-meter scale positioning and tracking accuracy of moving devices is indeed technically feasible in future 5G radio access networks operating at sub-6 GHz frequencies, despite the realistic assumptions related to clock offsets and potentially even under unsynchronized network elements.

AB - In this paper, we address the prospects and key enabling technologies for highly efficient and accurate device positioning and tracking in fifth generation (5G) radio access networks. Building on the premises of ultra-dense networks as well as on the adoption of multicarrier waveforms and antenna arrays in the access nodes (ANs), we first formulate extended Kalman filter (EKF)-based solutions for computationally efficient joint estimation and tracking of the time of arrival (ToA) and direction of arrival (DoA) of the user nodes (UNs) using uplink reference signals. Then, a second EKF stage is proposed in order to fuse the individual DoA and ToA estimates from one or several ANs into a UN position estimate. Since all the processing takes place at the network side, the computing complexity and energy consumption at the UN side are kept to a minimum. The cascaded EKFs proposed in this article also take into account the unavoidable relative clock offsets between UNs and ANs, such that reliable clock synchronization of the access-link is obtained as a valuable by-product. The proposed cascaded EKF scheme is then revised and extended to more general and challenging scenarios where not only the UNs have clock offsets against the network time, but also the ANs themselves are not mutually synchronized in time. Finally, comprehensive performance evaluations of the proposed solutions on a realistic 5G network setup, building on the METIS project based outdoor Madrid map model together with complete ray tracing based propagation modeling, are provided. The obtained results clearly demonstrate that by using the developed methods, sub-meter scale positioning and tracking accuracy of moving devices is indeed technically feasible in future 5G radio access networks operating at sub-6 GHz frequencies, despite the realistic assumptions related to clock offsets and potentially even under unsynchronized network elements.

U2 - 10.1109/TWC.2017.2669963

DO - 10.1109/TWC.2017.2669963

M3 - Article

VL - 16

SP - 2866

EP - 2881

JO - IEEE Transactions on Wireless Communications

JF - IEEE Transactions on Wireless Communications

SN - 1536-1276

IS - 5

ER -