论文标题
多源系统信息的中断分析
Outage Analysis of Age-of-Information for Multi-Source Systems
论文作者
论文摘要
信息时代（AOI）是一种有效的性能指标，可衡量信息的新鲜度，并且在涉及状态更新的应用中很受欢迎。大多数现有作品都采用平均AOI作为指标，无法提供严格的性能保证。在这项工作中，在循环计划下的多源系统中分析了超过给定阈值的峰值AOI的中断概率。考虑了两个排队学科，即第一台官员（FCFS）队列和单个数据包队列。对于FCF，衍生出中断概率上的上限和下限，这是渐近地重合其真实缩放的。对于单数据包队列，得出了上限，其有效性通过仿真结果验证。该分析结合了这样一种普遍的信念，即单数据包排队的AOI性能比FCF更好。此外，它还揭示了这两个学科的渐近表现将在跨越时间大得多时具有相似的渐近性能。
Age of information (AoI) is an effective performance metric measuring the freshness of information and is popular for applications involving status update. Most of the existing works have adopted average AoI as the metric, which cannot provide strict performance guarantees. In this work, the outage probability of the peak AoI exceeding a given threshold is analyzed in a multi-source system under round robin scheduling. Two queueing disciplines are considered, namely the first-come-first-serve (FCFS) queue and the single packet queue. For FCFS, upper and lower bounds on the outage probability are derived which coincides asymptotically, characterizing its true scaling. For the single packet queue, an upper bound is derived whose effectiveness is validated by the simulation results. The analysis concretizes the common belief that single packet queueing has a better AoI performance than FCFS. Moreover, it also reveals that the two disciplines would have similar asymptotic performance when the inter-arrival time is much larger than the total transmission time.
