决策信息时代
Age of Information Upon Decisions
摘要：
我们考虑一个M/M/1更新和决定系统，泊松分布的决定是根据收到的更新。我们建议表征的新鲜度，在决策时代与年龄决定（AuD）收到的更新。在先到先得的策略（FCFS）下，得到封闭形式的平均AuD。我们证明了系统的平均AuD是由到达率和服务率决定的，并且与判决率无关。因此，仅仅提高决策率并不能提高决策的及时性。然而，同时提高到达率和服务率可以有效地降低平均AuD。
英文摘要：
We consider an M/M/1 update-and-decide system where Poisson distributed decisions are made based on the received updates. We propose to characterize the freshness of the received updates at decision epochs with Age upon Decisions (AuD). Under the first-come-first-served policy (FCFS), the closed form average AuD is derived. We show that the average AuD of the system is determined by the arrival rate and the service rate, and is independent of the decision rate. Thus, merely increasing the decision rate does not improve the timeliness of decisions. Nevertheless, increasing the arrival rate and the service rate simultaneously can decrease the average AuD efficiently.
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