Worst Case Age of Information in Wireless Sensor Networks: A Multi-Access Channel

Freshness of status update packets is essential for enabling a wide range of applications in wireless sensor networks (WSNs). Accordingly, we consider a WSN where sensors communicate status updates to a destination by contending for the channel access based on a carrier sense multiple access (CSMA) method. We analyze the worst case average age of information (AoI) and average peak AoI from the view of one sensor in a system where all the other sensors have a saturated queue. Numerical results illustrate the importance of optimizing the contention window size and the packet arrival rate to maximize the information freshness.

• Publication year

  2020

• Venue

  IEEE Wireless Communications Letters

• Publication date

  2020-03-01

• Fields of study

  Computer Science, Engineering

• Identifiers
  DOI 10.1109/LWC.2019.2953628
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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