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Computer Science > Information Theory

arXiv:1904.03477 (cs)
[Submitted on 6 Apr 2019]

Title:Broadcast Age of Information in CSMA/CA Based Wireless Networks

Authors:Mei Wang, Yunquan Dong
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Abstract:We consider a wireless sensor network in which all the nodes wish to spread their updates over the network using CSMA/CA protocol. We investigate the age of information of the spreading process from a transmitter perspective, which is referred to as the \textit{broadcast age of information (BAoI)}. To be specific, BAoI is the age of the latest update successfully broadcasted to the one-hop neighbors of a node, and thus is suitable to measure the rapidity of the update spreading process. We establish an equivalent transmission model of the network by deriving the transmission probability and the collision probability of nodes. With this equivalent model, we then present the average BAoI of the network explicitly. Our results present the scaling laws of average BAoI with respect to node density and frame length, and are further illustrated through numerical results. As is shown, the average BAoI is increasing with node density and is convex in frame length, i.e., would be large when frame length is very small or very large.
Comments: 6 pages, 6 figures. To appear in IEEE IWCMC 2019
Subjects: Information Theory (cs.IT)
Cite as: arXiv:1904.03477 [cs.IT]
  (or arXiv:1904.03477v1 [cs.IT] for this version)
  https://doi.org/10.48550/arXiv.1904.03477

Submission history

From: Yunquan Dong [view email]
[v1] Sat, 6 Apr 2019 15:47:09 UTC (688 KB)
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