Age of Information in Multi-hop Networks with Priorities

Olga Vikhorova, Federico Chiariotti, Beatriz Soret, Giuseppe Araniti, Antonella Molinaro, Petar Popovski

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

8 Citations (Scopus)


Age of Information is a new metric used in real-time status update tracking applications. It measures at the destination the time elapsed since the generation of the last received packet. In this paper, we consider the co-existence of critical and noncritical status updates in a two-hop system, for which the network assigns different scheduling priorities. Specifically, the high priority is reserved to the packets that traverse the two nodes, as they experience worse latency performance. We obtain the distribution of the age and its natural upper bound termed peak age. We provide tight upper and lower bounds for priority updates and the exact expressions for the non-critical flow of packets with a general service distribution. The results give fundamental insights for the design of age-sensitive multi-hop systems.

Original languageEnglish
Title of host publicationGLOBECOM 2020 - 2020 IEEE Global Communications Conference
Number of pages6
Publication date2020
Article number9348175
ISBN (Print)978-1-7281-8299-5
ISBN (Electronic)978-1-7281-8298-8
Publication statusPublished - 2020
EventGLOBECOM 2020 - 2020 IEEE Global Communications Conference - Taipei, Taiwan, Province of China
Duration: 7 Dec 202011 Dec 2020


ConferenceGLOBECOM 2020 - 2020 IEEE Global Communications Conference
Country/TerritoryTaiwan, Province of China
SeriesIEEE Global Communications Conference (GLOBECOM)


  • AoI
  • IoT
  • Peak AoI
  • multi-hop networks
  • priority


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