作者
Ali Maatouk, Mohamad Assaad, Anthony Ephremides
发表日期
2019/7/7
研讨会论文
2019 IEEE International Symposium on Information Theory (ISIT)
页码范围
325-329
出版商
IEEE
简介
In this paper, we consider N information streams sharing a common service facility. The streams are supposed to have different priorities based on their sensitivity. A higher priority stream will always preempt the service of a lower priority packet. By leveraging the notion of Stochastic Hybrid Systems (SHS), we investigate the Age of Information (AoI) in the case where each stream has its own waiting room; when preempted by a higher priority stream, the packet is stored in the waiting room for future resume. Interestingly, it will be shown that a "no waiting room" scenario, and consequently discarding preempted packets, is better in terms of average AoI in some cases. The exact cases where this happen are discussed and numerical results that corroborate the theoretical findings and highlight this trade-off are provided.
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A Maatouk, M Assaad, A Ephremides - 2019 IEEE International Symposium on Information …, 2019