发表机构
Middle East Technical University（中东技术大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文针对异构传输路由，提出联合采样、路由激活与抢占控制的平均成本脉冲控制模型，发现抢占可逆转路由偏好，使平均AoI最多降低96%。
AI 中文摘要
本文研究在长期目标下，对$N$条异构传输路由进行联合采样、路由激活和抢占控制，该目标将信息年龄（AoI）与采样和传输成本相结合。我们将该问题建模为平均成本脉冲控制模型，在混合状态空间上推导出向量形式的积分平均成本最优性方程，并建立状态上的结构约简。我们考虑双路由情形，并使用离散化策略迭代计算优化策略。令人惊讶的是，结果表明抢占可以逆转路由偏好：优化策略可能只使用平均延迟和延迟方差都较大的路由，而避开看似更优的路由。与不允许抢占的基线相比，所提出的策略将平均AoI最多降低96%。
英文摘要
This paper studies joint sampling, route activation, and preemption control over $N$ heterogeneous transmission routes under a long-run objective combining Age of Information (AoI) with sampling and transmission costs. We formulate the problem as an average-cost impulse-control model, derive a vector-form integral average-cost optimality equation over a hybrid state space, and establish structural reductions on the state. We consider a two-route case and compute optimized policies using discretized policy iteration. Surprisingly, the results show that preemption can reverse routing preferences: the optimized policy may exclusively use a route with both a larger mean delay and a larger delay variance while avoiding the seemingly superior route. Relative to baselines that do not allow preemption, the proposed policy reduces average AoI by up to $96\%$.
Comments6 pages, 3 figures
