Age of Information in Wireless Networks: Spatiotemporal Analysis and Locally Adaptive Power Control

Meiyan Song, Howard H. Yang, Hangguan Shan, Jemin Lee, Tony Q.S. Quek

研究成果: Article同行評審

9 引文 斯高帕斯(Scopus)


The boom in Internet of Things has spawned many real-time applications, which have stringent requirements for the timeliness of information delivery. As a result, age of information (AoI) has emerged as a metric to evaluate information freshness at the destination and aroused widespread attention from both academia and industry. In this paper, we develop a theoretical framework to evaluate the statistics of AoI, including its average and violation probability, in wireless networks under different types of sources and updating patterns. The analyses account for the randomness that arises from both the spatial deployment and temporal queueing dynamics, and its accuracy is verified through simulations. Based on the analytical results, we design a locally adaptive power control policy to optimize the sum of average AoI of all nodes, which allows each node to assign transmit power according to its local observation. The proposed scheme has low implementation complexity. Numerical results show that the proposed power control policy can significantly improve information freshness. The scheme is well adapted to variants of network environment and heterogeneous source-destination distance. Further, we evaluate the effect of the retransmission mechanism and updating patterns on the AoI performance.

頁(從 - 到)3123-3136
期刊IEEE Transactions on Mobile Computing
出版狀態Published - 2023 6月 1

All Science Journal Classification (ASJC) codes

  • 軟體
  • 電腦網路與通信
  • 電氣與電子工程


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