2021/01/05 by Timofei Istomin, Elia Leoni, Istomin, Timofei +9
Computer Science · #Bluetooth and Wireless Communication Technologies #FOS: Computer and information sciences #Networking and Internet Architecture (cs.NI) #Opportunistic and Delay-Tolerant Networks #Wireless Networks and Protocols
paper · pdf · doi:10.48550/arxiv.2101.01514
openalex publication_date 2021/01/05 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Determining when two individuals are within close distance is key to contain a pandemic, e.g., to alert individuals in real-time and trace their social contacts. Common approaches rely on either Bluetooth Low Energy (BLE) or ultra-wideband (UWB) radios, that nonetheless strike opposite tradeoffs for energy efficiency vs. accuracy of distance estimates. Janus reconciles these dimensions with a dual-radio protocol enabling efficient and accurate social contact detection. Measurements show that Janus achieves weeks to months of autonomous operation, depending on the configuration. Several large-scale campaigns in real-world contexts confirm its reliability and practical usefulness in enabling insightful analysis of contact data.