Software-defined radio implementation of age-of-information-oriented random access
Refereed conference paper presented and published in conference proceedings

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AbstractMore and more emerging Internet of Things (IoT) applications involve status updates, where various IoT devices monitor certain physical processes and report their latest statuses to the relevant information fusion nodes. A new performance measure, termed the age of information (AoI), has recently been proposed to quantify the information freshness in time-critical IoT applications. Due to a large number of devices in future IoT networks, the decentralized channel access protocols (e.g. random access) are preferable thanks to their low network overhead. Built on the AoI concept, some recent efforts have developed several AoI-oriented ALOHA-like random access protocols for boosting the network-wide information freshness. However, all relevant works focused on theoretical designs and analysis. The development and implementation of a working prototype to evaluate and further improve these random access protocols in practice have been largely overlooked. Motivated as such, we build a software-defined radio (SDR) prototype for testing and comparing the performance of recently proposed AoI-oriented random access protocols. To this end, we implement a time-slotted wireless system by devising a simple yet effective over-the-air time synchronization scheme, in which beacons that serve as reference timing packets are broadcast by an access point (AP) from time to time. For a complete working prototype, we also design the frame structures of various packets exchanged within the system. Finally, we design a set of experiments, implement them on our prototype and test the considered algorithms in an office environment.
Acceptance Date15/07/2020
All Author(s) ListZixiao Han, Jiaxin Liang, Yifan Gu, He Chen
Name of ConferenceIECON 2020 The 46th Annual Conference of the IEEE Industrial Electronics Society
Start Date of Conference18/10/2020
End Date of Conference21/10/2020
Place of ConferenceSingapore
Country/Region of ConferenceSingapore
Proceedings TitleIECON 2020 The 46th Annual Conference of the IEEE Industrial Electronics Society
Pages4374 - 4379
LanguagesEnglish-United States

Last updated on 2022-10-01 at 23:30