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Minimizing Age of Information in a Multihop Wireless Network

Ashok Krishnan, KS and Sharma, V (2020) Minimizing Age of Information in a Multihop Wireless Network. In: 2020 IEEE International Conference on Communications, ICC 2020, 7-11 June 2020, Dublin, Ireland.

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Official URL: https://dx.doi.org/10.1109/ICC40277.2020.9148762


We consider the problem of minimizing age in a multihop wireless network. There are multiple source-destination pairs, transmitting data through multiple wireless channels, over multiple hops. We propose a network control policy which consists of a distributed scheduling algorithm, utilizing channel state information and queue lengths at each link, in combination with a packet dropping rule. Dropping of older packets locally at queues is seen to reduce the average age of flows, even below what can be achieved by Last Come First Served (LCFS) scheduling. Dropping of older packets also allows us to use the network without congestion, irrespective of the rate at which updates are generated. Furthermore, exploiting system state information substantially improves performance. The proposed scheduling policy obtains average age values close to a theoretical lower bound as well. © 2020 IEEE.

Item Type: Conference Paper
Publication: IEEE International Conference on Communications
Publisher: Institute of Electrical and Electronics Engineers Inc.
Additional Information: The copyright of this article belongs to Institute of Electrical and Electronics Engineers Inc.
Keywords: Scheduling; Wireless networks, Distributed scheduling algorithms; Last-come first-served; Multihop wireless network; Multiple source; Multiple wireless channels; Network control; Scheduling policies; Transmitting data, Channel state information
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited: 01 Sep 2020 10:27
Last Modified: 01 Sep 2020 10:27
URI: http://eprints.iisc.ac.in/id/eprint/66436

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