Age Minimization for Status Update Systems with Packet Based Transmissions over Fading Channels

Deli Qiao, M. Cenk Gursoy

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This work has been supported in part by the National Natural Science Foundation of China (61671205). In this paper, the minimization of the average age of information (AoI) in status update systems is studied, in which the update packets are transmitted with fixed rate subject to maximum retransmission rounds. It is assumed that a new status update packet is generated only either after the previous packet has been successfully received or the maximum number of retransmission rounds of the old packet has been reached. The AoI minimization problem is then formulated as a constrained Markov decision process (CMDP) problem. By resorting to the Lagrangian approach, the CMDP problem is transferred to an equivalent unconstrained Markov decision process (MDP) problem. An algorithm is proposed to derive the optimal power allocation policy. Numerical results on the proposed optimal power control policy show that the optimal power control can reduce the average AoI significantly in the low-power regime compared to the constant power policy.

Original languageEnglish (US)
Title of host publication2019 11th International Conference on Wireless Communications and Signal Processing, WCSP 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728135557
DOIs
StatePublished - Oct 2019
Event11th International Conference on Wireless Communications and Signal Processing, WCSP 2019 - Xi'an, China
Duration: Oct 23 2019Oct 25 2019

Publication series

Name2019 11th International Conference on Wireless Communications and Signal Processing, WCSP 2019

Conference

Conference11th International Conference on Wireless Communications and Signal Processing, WCSP 2019
CountryChina
CityXi'an
Period10/23/1910/25/19

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ASJC Scopus subject areas

  • Computer Networks and Communications
  • Hardware and Architecture
  • Signal Processing
  • Safety, Risk, Reliability and Quality
  • Artificial Intelligence

Cite this

Qiao, D., & Gursoy, M. C. (2019). Age Minimization for Status Update Systems with Packet Based Transmissions over Fading Channels. In 2019 11th International Conference on Wireless Communications and Signal Processing, WCSP 2019 [8928078] (2019 11th International Conference on Wireless Communications and Signal Processing, WCSP 2019). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/WCSP.2019.8928078