Age of Information of Parallel Server Systems with Energy Harvesting

Motivated by current communication networks in which users can choose different transmission channels to operate and also by the recent growth of renewable energy sources, we study the average Age of Information of a status update system that is formed by two parallel homogeneous servers and such th...

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Autor principal:	Josu Doncel
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	parallel servers energy harvesting Age of Information Science Q Astrophysics QB460-466 Physics QC1-999
Acceso en línea:	https://doaj.org/article/5ca62478d8bc48f7ad3f27cfbae3dd6b
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id	oai:doaj.org-article:5ca62478d8bc48f7ad3f27cfbae3dd6b
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spelling	oai:doaj.org-article:5ca62478d8bc48f7ad3f27cfbae3dd6b2021-11-25T17:30:55ZAge of Information of Parallel Server Systems with Energy Harvesting10.3390/e231115491099-4300https://doaj.org/article/5ca62478d8bc48f7ad3f27cfbae3dd6b2021-11-01T00:00:00Zhttps://www.mdpi.com/1099-4300/23/11/1549https://doaj.org/toc/1099-4300Motivated by current communication networks in which users can choose different transmission channels to operate and also by the recent growth of renewable energy sources, we study the average Age of Information of a status update system that is formed by two parallel homogeneous servers and such that there is an energy source that feeds the system following a random process. An update, after getting service, is delivered to the monitor if there is energy in a battery. However, if the battery is empty, the status update is lost. We allow preemption of updates in service and we assume Poisson generation times of status updates and exponential service times. We show that the average Age of Information can be characterized by solving a system with eight linear equations. Then, we show that, when the arrival rate to both servers is large, the average Age of Information is one divided by the sum of the service rates of the servers. We also perform a numerical analysis to compare the performance of our model with that of a single server with energy harvesting and to study in detail the aforementioned convergence result.Josu DoncelMDPI AGarticleparallel serversenergy harvestingAge of InformationScienceQAstrophysicsQB460-466PhysicsQC1-999ENEntropy, Vol 23, Iss 1549, p 1549 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	parallel servers energy harvesting Age of Information Science Q Astrophysics QB460-466 Physics QC1-999
spellingShingle	parallel servers energy harvesting Age of Information Science Q Astrophysics QB460-466 Physics QC1-999 Josu Doncel Age of Information of Parallel Server Systems with Energy Harvesting
description	Motivated by current communication networks in which users can choose different transmission channels to operate and also by the recent growth of renewable energy sources, we study the average Age of Information of a status update system that is formed by two parallel homogeneous servers and such that there is an energy source that feeds the system following a random process. An update, after getting service, is delivered to the monitor if there is energy in a battery. However, if the battery is empty, the status update is lost. We allow preemption of updates in service and we assume Poisson generation times of status updates and exponential service times. We show that the average Age of Information can be characterized by solving a system with eight linear equations. Then, we show that, when the arrival rate to both servers is large, the average Age of Information is one divided by the sum of the service rates of the servers. We also perform a numerical analysis to compare the performance of our model with that of a single server with energy harvesting and to study in detail the aforementioned convergence result.
format	article
author	Josu Doncel
author_facet	Josu Doncel
author_sort	Josu Doncel
title	Age of Information of Parallel Server Systems with Energy Harvesting
title_short	Age of Information of Parallel Server Systems with Energy Harvesting
title_full	Age of Information of Parallel Server Systems with Energy Harvesting
title_fullStr	Age of Information of Parallel Server Systems with Energy Harvesting
title_full_unstemmed	Age of Information of Parallel Server Systems with Energy Harvesting
title_sort	age of information of parallel server systems with energy harvesting
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/5ca62478d8bc48f7ad3f27cfbae3dd6b
work_keys_str_mv	AT josudoncel ageofinformationofparallelserversystemswithenergyharvesting
_version_	1718412224917143552

Age of Information of Parallel Server Systems with Energy Harvesting

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