On the Age of Information With Packet Deadlines

On the Age of Information With Packet Deadlines
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DOI:
10.1109/tit.2018.2818739
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发表时间:
2018-09-01
影响因子:
2.5
通讯作者:
Ephremides, Anthony
Ephremides, Anthony
中科院分区:
计算机科学2区
文献类型:
--
作者:
Kam, Clement;Kompella, Sastry;Ephremides, Anthony

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我们研究信息的年龄,这是在远程监视器上观察到的不断更新的信息的新鲜度的度量。信息度量的年龄已被研究了各种不同的嵌入式系统,在本文中,我们引入了一个数据包的最后期限作为一种控制机制,研究它的影响的平均年龄的信息为M/M/1/2嵌入式系统。我们分析了系统的情况下,一个固定的最后期限和一个随机指数的最后期限,并得出封闭形式的平均年龄的表达式。我们还推导出一个封闭形式的表达式为随机指数的情况下的最佳平均期限。我们的数值结果显示了年龄性能的关系,M/M/1/1和M/M/1/2系统,我们证明了使用截止期可以优于M/M/1/1和M/M/1/2没有截止期。
We study the age of information, which is a measure of the freshness of a continually updated piece of information as observed at a remote monitor. The age of information metric has been studied for a variety of different queueing systems, and in this paper, we introduce a packet deadline as a control mechanism to study its impact on the average age of information for an M/M/1/2 queueing system. We analyze the system for the cases of a fixed deadline and a random exponential deadline and derive closed-form expressions for the average age. We also derive a closed-form expression for the optimal average deadline for the random exponential case. Our numerical results show the relationship of the age performance to that of the M/M/1/1 and M/M/1/2 systems, and we demonstrate that using a deadline can outperform both the M/M/1/1 and M/M/1/2 without deadline.