论文标题
信息新鲜度和数据包下降率相互作用
Information Freshness and Packet Drop Rate Interplay in a Two-User Multi-Access Channel
论文作者
论文摘要
在这项工作中，我们结合了及时提供信息的两个概念，以研究其相互作用。也就是说，由于目的地的延迟限制和信息新鲜度，截止日期约束的数据包交付。更具体地说，我们考虑一个带有随机访问的两用户多访问设置，其中用户1是一个无线设备，具有队列，并且具有外部爆发流量，该设备是截止日期限制的外部爆发流量，而用户2则监视传感器并将状态更新传输到目的地。对于这种简单但有意义的设置，我们为用户1的吞吐量和掉落概率提供了分析表达式，以及用户2的平均信息年龄（AOI）监视传感器的分析表达式。关系表明，用户2的平均AOI与用户1的下降速率之间存在权衡取舍：平均AOI越低，降低率越高，反之亦然。模拟证实了我们理论结果的有效性。
In this work, we combine the two notions of timely delivery of information in order to study their interplay; namely, deadline-constrained packet delivery due to latency constraints and freshness of information at the destination. More specifically, we consider a two-user multiple access setup with random access, in which user 1 is a wireless device with a queue and has external bursty traffic which is deadline-constrained, while user 2 monitors a sensor and transmits status updates to the destination. For this simple, yet meaningful setup, we provide analytical expressions for the throughput and drop probability of user 1, and an analytical expression for the average Age of Information (AoI) of user 2 monitoring the sensor. The relations reveal that there is a trade-off between the average AoI of user 2 and the drop rate of user 1: the lower the average AoI, the higher the drop rate, and vice versa. Simulations corroborate the validity of our theoretical results.
