Relative Age of Information: Maintaining Freshness while Considering the Most Recently Generated Information

08/01/2018

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by   George Kesidis, et al.

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A queueing system handling a sequence of message arrivals is considered where each message obsoletes all previous messages. The objective is to assess the freshness of the latest message/information that has been successfully transmitted, i.e., "age of information" (AoI). We study a variation of traditional AoI, the "Relative AoI", here defined so as to account for the presence of newly arrived messages/information to the queue to be transmitted. Both unbuffered and buffered systems are considered.