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arXiv · 1904.11481

Age of Information in Multicast Networks with Multiple Update Streams

Baturalp Buyukates·Alkan Soysal·Sennur Ulukus
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Abstract

We consider the age of information in a multicast network where there is a single source node that sends time-sensitive updates to $n$ receiver nodes. Each status update is one of two kinds: type I or type II. To study the age of information experienced by the receiver nodes for both types of updates, we consider two cases: update streams are generated by the source node at-will and update streams arrive exogenously to the source node. We show that using an earliest $k_1$ and $k_2$ transmission scheme for type I and type II updates, respectively, the age of information of both update streams at the receiver nodes can be made a constant independent of $n$. In particular, the source node transmits each type I update packet to the earliest $k_1$ and each type II update packet to the earliest $k_2$ of $n$ receiver nodes. We determine the optimum $k_1$ and $k_2$ stopping thresholds for arbitrary shifted exponential link delays to individually and jointly minimize the average age of both update streams and characterize the pareto optimal curve for the two ages.

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Baturalp Buyukates, Alkan Soysal, Sennur Ulukus. 2019-04-25. Age of Information in Multicast Networks with Multiple Update Streams. https://arxiv.org/abs/1904.11481

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