TY - GEN
T1 - Wayfinding in complex buildings using visible light communication
AU - Vieira, M.
AU - Vieira, M. A.
AU - Louro, Paula
AU - Fantoni, Alessandro
AU - Vieira, Pedro
N1 - Funding Information:
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FEEA%2F00066%2F2019/PT#
FLAD, Fundação Luso-Americana para o Desenvolvimento. The projects: IPL/2018/II&D_CTS/UNINOVA_ISEL and: IPL/IDI&CA/2019/Bid-VLC/ISEL.
PY - 2020
Y1 - 2020
N2 - This paper investigates the applicability of an intuitive wayfinding system in complex buildings using Visible Light Communication (VLC). Typical scenarios include: finding places, like a particular shop or office, guiding users across different floors, and through elevators and stairs. Data from the sender is encoded, modulated and converted into light signals emitted by the transmitters. Tetra-chromatic white sources are used providing a different data channel for each chip. At the receiver side, the modulated light signal, containing the ID and the 3D geographical position of the transmitter and wayfinding information, is received by a SiC photodetector with light filtering and demultiplexing properties. Since lighting and wireless data communication is combined, each luminaire for downlink transmission becomes a single cell, in which the optical access point (AP) is located in the ceiling and the mobile users are scattered across the overlap discs of each cell, underneath. The light signals emitted by the LEDs are interpreted directly by the receivers of the positioned users. Bidirectional communication is tested. The effect of the location of the Aps is evaluated and a 3D model for the cellular network is analyzed. In order to convert the floorplan to a 3D geometry, a tandem of layers in a orthogonal topology is tested, and a 3D localization design, demonstrated by a prototype implementation, is presented. Uplink transmission is implemented, and the 3D best route to navigate through venue is calculated. Buddy wayfinding services are also considered. The results showed that the dynamic VLC navigation system enables to determine the position of a mobile target inside the network, to infer the travel direction along the time, to interact with received information and to optimize the route towards a static or dynamic destination.
AB - This paper investigates the applicability of an intuitive wayfinding system in complex buildings using Visible Light Communication (VLC). Typical scenarios include: finding places, like a particular shop or office, guiding users across different floors, and through elevators and stairs. Data from the sender is encoded, modulated and converted into light signals emitted by the transmitters. Tetra-chromatic white sources are used providing a different data channel for each chip. At the receiver side, the modulated light signal, containing the ID and the 3D geographical position of the transmitter and wayfinding information, is received by a SiC photodetector with light filtering and demultiplexing properties. Since lighting and wireless data communication is combined, each luminaire for downlink transmission becomes a single cell, in which the optical access point (AP) is located in the ceiling and the mobile users are scattered across the overlap discs of each cell, underneath. The light signals emitted by the LEDs are interpreted directly by the receivers of the positioned users. Bidirectional communication is tested. The effect of the location of the Aps is evaluated and a 3D model for the cellular network is analyzed. In order to convert the floorplan to a 3D geometry, a tandem of layers in a orthogonal topology is tested, and a 3D localization design, demonstrated by a prototype implementation, is presented. Uplink transmission is implemented, and the 3D best route to navigate through venue is calculated. Buddy wayfinding services are also considered. The results showed that the dynamic VLC navigation system enables to determine the position of a mobile target inside the network, to infer the travel direction along the time, to interact with received information and to optimize the route towards a static or dynamic destination.
KW - Bidirectional Communication
KW - Indoor multi-level environments
KW - Indoor navigation
KW - Multiplexing/demultiplexing techniques
KW - Optical sensors
KW - Transmitter/receiver
KW - Visible Light Communication
KW - Wayfinding
UR - http://www.scopus.com/inward/record.url?scp=85097645676&partnerID=8YFLogxK
U2 - 10.1117/12.2543059
DO - 10.1117/12.2543059
M3 - Conference contribution
AN - SCOPUS:85097645676
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Physics and Simulation of Optoelectronic Devices XXVIII
A2 - Witzigmann, Bernd
A2 - Osinski, Marek
A2 - Arakawa, Yasuhiko
PB - SPIE-International Society for Optical Engineering
T2 - Physics and Simulation of Optoelectronic Devices XXVIII 2020
Y2 - 3 February 2020 through 6 February 2020
ER -