Projecte ofert
Títol: Quantifying Wi-Fi RTT User Scalability in Access Points Using NS-3
Per assignar-vos el projecte us heu de dirigir al director/a perquè us l'assigni.
Director/a: ZOLA, ENRICA VALERIA
Departament: ENTEL
Títol: Quantifying Wi-Fi RTT User Scalability in Access Points Using NS-3
Data inici oferta: 13-10-2025 Data finalització oferta: 13-05-2026
Estudis d'assignació del projecte:
GR ENG SIS TELECOMUN- GR ENG TELEMÀTICA
| Tipus: Individual | |
| Lloc de realització: EETAC | |
| Segon director/a (UPC): MARTIN ESCALONA, ISRAEL | |
| Paraules clau: | |
| IEEE 802.11mc, indoor positioning, Wi-Fi RTT, network simulation, ns-3, python | |
| Descripció del contingut i pla d'activitats: | |
| Few years ago, Google included IEEE 802.11mc technology in Android O.S. This amendment was addressed to provide positioning capabilities to the Wi-Fi network so that indoor positioning, where GPS is known not to work properly, becomes possible. According to the IEEE 802.11 FTM standard (aka Wi-Fi RTT), the process for a device (initiating station, STA) to obtain its distance from another device (responding station, typically an Access Point, AP) is as follows:
i) STA starts the ranging measurement by sending an FTM Request frame to the AP. ii) After sending and Acknowledgment Frame, the AP can start sending the first FTM Frame and collecting the timestamps. iii) Each FTM Frame is acknowledged back by the STA. iv) Another FTM Frame is needed at the end of the process to deliver the timestamps collected by the AP, so that the STA can compute the Round Trip Time (RTT). According to the standard, the STA should be able to obtain an RTT estimate within about 30ms. Provided that Wi-Fi users, both location users and common users, share the same physical medium, the number of simultaneous users in the network is limited. In these conditions, and under the assumption that a STA may require an RTT every second, many authors in the literature consider that each AP can serve approximately 30-33 STAs per second. This threshold represents a scalability constraint imposed by the same Wi-Fi RTT ranging approach. Recently, the FTM-ns3 has been released, an extension for the widely used ns3 network simulator to support the 802.11 FTM protocol. The simulator paves the way for further investigation of the saturation limit under more realistic conditions (e.g., when collisions occur). The main goal of this project is to evaluate the maximum number of Wi-Fi RTT location users that are allowed in the network. To this end, the network simulator ns-3 will be used to simulate the scenario in which an increasing number of STAs starts the Wi-Fi RTT process: the higher this number, the higher the probability of collision, thus the higher the number of retransmissions, too. Objectives: 1) Update the FTM-ns3 extension to the last ns-3 version, if required 2) Understand how the ns3 simulator works 3) Define the scenario in which the performance analysis of saturation is performed 4) Develop new modules in the ns3 simulator, if necessary to deploy the scenario used in the analysis 5) Performance analysis of the results obtained from simulation 6) Proper representation of the results obtained (plots, tables, statistics, etc.) 7) Write a research paper to present the results in an international conference |
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| Orientació a l'estudiant: | |
| Good knowledge on Wi-Fi 802.11 protocols. Good knowledge of Python and C++. | |
| 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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