050 - Proof of concept of hybrid 5G-NR/GNSS Positioning with ad-hoc overlay

050 - Proof of concept of hybrid 5G-NR/GNSS Positioning with ad-hoc overlay

Status: On Going

Activity Code: NAVISP-EL1-050

Start date: 16/04/2021

Duration: 18 Months

The Hybrid Overlay Positioning with 5G and GNSS (HOP-5G) project targets the demonstration of a
5G local overlay testbed for enhanced user positioning, in combination with GNSS and sensor
technologies. Within this project, the HOP-5G consortium focuses on the exploitation of 5G
innovative positioning enablers and their hybridisation with GNSS and sensors. This is based on the
dedicated deployment of 5G base stations (BSs) fixed on ground and BSs boarded in Unmanned
Aerial Vehicles (UAVs), leading to the so-called 5G local overlay network. As a result, this activity
develops a first-of-a-kind testbed able to demonstrate proof-of-concepts use cases of hybrid 5G and
GNSS positioning.
GNSS has become the corner stone of worldwide positioning applications, and in particular for those
requiring high-accuracy. The outstanding performances in open sky and very competitive
performances in degraded environments of GNSS are widely acknowledged, but also the need to
complement GNSS by other technologies to address specific needs in challenging environments.
In this context, 5G appears to be among the most suitable candidates to complement the GNSS &
IMU technology-mix currently representing the state-of-the-art for robust and high-accuracy
applications. 5G technologies could provide high performance TDoA measurements under specific
assumptions, which include very good synchronisation among nodes (e.g. 5G nodes disciplined to
GNSS), and Line-of-Sight conditions between the node and the user equipment (UE). The latter
assumptions may be considered reasonable within dense, local positioning infrastructures, also
known in the 5G landscape as enhanced positioning service area. For this, 5G also features
interesting capabilities to support a cost-efficient deployment of local networks or private networks
dedicated to positioning (e.g. local overlay, either static or mobile, in which it is supported by nodes
on vehicles or on UAVs). For instance, with 5G, a Mobile Network Operator or smart city could invest
in local infrastructures to enhance GNSS in addressing specific needs where and when needed by
customers, for instance:
- enhanced coverage in terms of robustness, accuracy or availability, in e.g. smart cities aiming at
enhanced service in some places with high commercial potential, temporary coverage of special
events, or during public work in deep urban canyons to enhance machine control capabilities;
- enhanced secure positioning/waypointing or bootstrapping of the UE, thanks to distance bounding
and secure time transfer over 5G, e.g. along a road, where the overlay would act as a gantry to
control GNSS-enabled positioning.
In addition, with the potential advent of the so-called 5G non-terrestrial networks (e.g. UAVs, HAPS,
LEO satellites), one could also envisage to use such 5G signals in a wide area or even a global
coverage scenario. This landscape carries multiple opportunities to foster the use of GNSS as a key
enabler to 5G positioning capabilities, for which a proof-of-concept is required, this could be done
using an MIMO SDR as a starting point. 
The proposed activity has as its main objective a proof of concept of a hybrid positioning system
using GNSS with 5G TDoA/angular measurements in ad-hoc overlay, aiming to enhance local
GNSS capabilities. This will include several first-of-a-kind technical achievements, e.g:

  • GNSS-disciplined 5G signals and positioning nodes;
  • hybrid positioning algorithms involving GNSS, 5G-TDoA/Angular measurements and dead-reckoning;
  • bootstrapping of GNSS functions with 5G.

The tasks to be performed will include:

  • selection and consolidation of targeted use cases for proof-of-concept;
  • system  definition and preliminary design of a test-bed (which is to include: positioning nodes disciplined on GNSS, enablers for TDoA and Angular measurements, SDR for the UE, hybrid positioning algorithms and reference trajectory mechanism);
  • development of the breadboards for the user equipment (UE) and positioning nodes using SDR (the latter disciplined to GNSS signals), including the UE algorithms; 
  • validation and fine tuning of the algorithms and concept in non-real time;
  • implementation of the most suitable concepts for the UE’s SDR, if possible in real time, and validation with laboratory tests;
  • demonstration of performance through field trials.

The main results of the activity will provide:

  • breadboards constituent of the testbed  and associated data package; 
  • output data from field trials and benchmark with off-the-shelf GNSS solutions.

Prime contractor

Airbus Defence and Space GmbH

Name: Airbus Defence and Space GmbH

Country: Germany

Website: https://www.airbus.com



Name: Qascom

Country: Italy

Website: http://www.qascom.com/index.php

Ericsson AB (Ericsson Research)

Name: Ericsson AB (Ericsson Research)

Country: Sweden



Name: Eurecom

Country: France

Website: http://www.eurecom.fr

Exafore Oy

Name: Exafore Oy

Country: Finland

Website: https://www.exafore.com

Tampere University

Name: Tampere University

Country: Finland

Website: https://www.tuni.fi

Last Updated: 31/05/2021 13:12