期刊
IEEE TRANSACTIONS ON COMMUNICATIONS
卷 69, 期 5, 页码 3176-3191出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TCOMM.2021.3053038
关键词
Age of information; peak age of information; edge computing; queuing networks
资金
- Danish Council for Independent Research [8022-00284B SEMIOTIC]
- European Union's Horizon 2020 research and innovation program as part of the IntellIoT project [957218]
Age of Information (AoI) is a critical metric for Internet of Things (IoT) applications, where fresh updates from sensors are essential. The development of edge computing solutions has reduced communication delays but processing time at the edge node must be considered. Reliable system design in terms of freshness requires understanding the full distribution of the Peak AoI (PAoI).
Age of Information (AoI) is a critical metric for several Internet of Things (IoT) applications, where sensors keep track of the environment by sending updates that need to be as fresh as possible. The development of edge computing solutions has moved the monitoring process closer to the sensor, reducing the communication delays, but the processing time of the edge node needs to be taken into account. Furthermore, a reliable system design in terms of freshness requires the knowledge of the full distribution of the Peak AoI (PAoI), from which the probability of occurrence of rare, but extremely damaging events can be obtained. In this work, we model the communication and computation delay of such a system as two First Come First Serve (FCFS) queues in tandem, analytically deriving the full distribution of the PAoI for the M/M/1 - M/D/1 and the M/M/1 - M/M/1 tandems, which can represent a wide variety of realistic scenarios.
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