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The Age of Information: Real-Time Status Updating by Multiple Sources

Yates, Roy D. ; Kaul, Sanjit K.

IEEE transactions on information theory, 2019-03, Vol.65 (3), p.1807-1827 [Periódico revisado por pares]

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Título:
The Age of Information: Real-Time Status Updating by Multiple Sources
Autor: Yates, Roy D. ; Kaul, Sanjit K.
Assuntos: Age of information ; Automobiles ; communication networks ; Hybrid systems ; Markov analysis ; Markov chains ; Measurement ; Monitoring ; Queueing analysis ; queueing systems ; Queues ; Queuing theory ; Sensors ; Servers ; stochastic hybrid systems ; Wireless communication
É parte de: IEEE transactions on information theory, 2019-03, Vol.65 (3), p.1807-1827
Descrição: We examine multiple independent sources providing status updates to a monitor through simple queues. We formulate an age of information (AoI) timeliness metric and derive a general result for the AoI that is applicable to a wide variety of multiple source service systems. For first-come first-served and two types of last-come first-served systems with Poisson arrivals and exponential service times, we find the region of feasible average status ages for multiple updating sources. We then use these results to characterize how a service facility can be shared among multiple updating sources. A new simplified technique for evaluating the AoI in finite-state continuous-time queuing systems is also derived. Based on stochastic hybrid systems, this method makes AoI evaluation to be comparable in complexity to finding the stationary distribution of a finite-state Markov chain.
Editor: New York: IEEE
Idioma: Inglês

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