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Age of Information of Multiple Sources with Queue Management
Linköping University, Department of Science and Technology, Communications and Transport Systems. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Behavioural Sciences and Learning. Linköping University, Faculty of Arts and Sciences.
Linköping University, Department of Science and Technology. Linköping University, Faculty of Science & Engineering.
Huawei Technology Co Ltd, Peoples R China.
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2015 (English)In: 2015 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC), IEEE , 2015, 5935-5940 p.Conference paper (Refereed)Text
Abstract [en]

We consider a system of multiple sources generating status update packets, which need to be sent by a single transmitter to a destination over a network. In the model we study, the packet generation time may vary at each source, and the packets go through the network with a random delay. Each update carries a time stamp of its generation, allowing the destination to calculate for each source the so called Age of Information, which measures the timeliness of each status update arriving. Considering that queuing delay can unnecessarily increase the age of a critical status update, we propose here a queue management technique, in which we maintain a queue with only the latest status packet of each source, overwriting any previously queued update from that source. This simple technique drastically limits the need for buffering and can be applied in systems where the history of source status is not relevant. We show that this scheme results in significantly less transmissions compared to the standard M/M/1 queue model. Furthermore, the proposed technique reduces the per source age of information, especially in settings not using queue management with high status update generation rates.

Place, publisher, year, edition, pages
IEEE , 2015. 5935-5940 p.
, IEEE International Conference on Communications, ISSN 1550-3607
National Category
Civil Engineering
URN: urn:nbn:se:liu:diva-127295DOI: 10.1109/ICC.2015.7249268ISI: 000371708106026ISBN: 978-1-4673-6432-4OAI: diva2:921294
IEEE International Conference on Communications (ICC)
Available from: 2016-04-20 Created: 2016-04-19 Last updated: 2016-04-20

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Pappas, NikolaosGunnarsson, JohanKratz, LudvigAngelakis, Vangelis
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Communications and Transport SystemsFaculty of Science & EngineeringDepartment of Behavioural Sciences and LearningFaculty of Arts and SciencesDepartment of Science and Technology
Civil Engineering

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