Projecte ofert
Títol: Improving the Implementation of the Passive-TDOA on COTS Wi-Fi devices
Per assignar-vos el projecte us heu de dirigir al director/a perquè us l'assigni.
Director/a: ZOLA, ENRICA VALERIA
Departament: ENTEL
Títol: Improving the Implementation of the Passive-TDOA on COTS Wi-Fi devices
Data inici oferta: 13-12-2024 Data finalització oferta: 13-07-2025
Estudis d'assignació del projecte:
MU MASTEAM 2015
| Tipus: Individual | |
| Lloc de realització: EETAC | |
| Segon director/a (UPC): MARTIN ESCALONA, ISRAEL | |
| Paraules clau: | |
| Implementation, assembler, passive-TDOA localization algorithm | |
| Descripció del contingut i pla d'activitats: | |
| Nowadays, indoor positioning is a still an open issue. The main reason, though not the only one, is that location indoors require accurate measurements, i.e. positioning errors of 1 to 2 meters in average. There are technologies, such as those based in ultra wideband (UWB) that are able to provide positions with only centimeters of uncertainty. However, those technologies require custom network and user equipment to work, which often make them costly and hard to deploy.
Lots of efforts have been addressed to use communication networks for location purposes. However, the problem then is that positioning errors rise (noticeably) over the 2 meters. In the recent past, a new location technique for Wi-Fi networks have been presented: passive TDOA. This technique uses the concept of 2-way TOA to compute the time of flight of Wi-Fi signals, but in a passive way (i.e. without injecting location traffic). This technique has been assessed under simulation, reporting good performance. Then it has been implemented in the top of the Wi-Fi Linux protocol stack (i.e. in the SoftMAC module). Although the results are good enough for indoor positioning under dark areas, they are far from what it's expected from simulation results. This is due to the latency generated on traversing the Wi-Fi protocol stack. This project tries to overcome that limitation. A proof of concept has been recently done by developing a preliminary implementation that allows a COTS Wi-Fi device to overhear RTS-CTS frames exchanged in the IEEE 802.11 network and gather their timestamps. Objectives: The first objective of this project is to improve the current implementation of the TDOA, so to enable the passive TDOA by overhearing the fine time measurements exchanged by IEEE 802.11mc devices with the Access Points. The second objective is to provide a set of tools to control and retrieve the measurements captured by the firmware, so that they can be used by any third piece of software interested in. Finally an assessment of the quality of the reported measurements will be done. |
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| Orientació a l'estudiant: | |
| The firmware is written in assembler, so good programming skills in that language will be appreciated.
Knowledge on the Wi-Fi 802.11 protocols. |
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| Requereix activitats hardware: No | |
| Requereix activitats software: Sí Sistema operatiu: Disc (Gb): | |
| Horari d'atenció a estudiants per a l'assignació de projecte: Send me an email (enrica.zola@upc.edu) |
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