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Age of Information (AoI) has gained importance as a Key Performance Indicator(KPI) for characterizing the freshness of information in information-updatesystems and time-critical applications. Recent theoretical research on thetopic has generated significant understanding of how various algorithms performin terms of this metric on various system models and networking scenarios. Inthis paper, by the help of the theoretical results, we analyzed the AoIbehavior on real-life networks, using our two test-beds, addressing IoTnetworks and regular computers. Excessive number of AoI measurements areprovided for variations of transport protocols such as TCP, UDP and web-socket,on wired and wireless links. Practical issues such as synchronization andselection of hardware along with transport protocol, and their effects on AoIare discussed. The results provide insight toward application and transportlayer mechanisms for optimizing AoI in real-life networks.

Towards AoI-aware Smart IoT Systems