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arXiv 1805.06752cs.NI
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信道状态未知的无线网络中最小年龄调度策略

Scheduling Policies for Age Minimization in Wireless Networks with Unknown Channel State

Rajat Talak, Igor Kadota, Sertac Karaman, Eytan Modiano

摘要:

信息年龄(AoI)是最近提出的一个度量标准,用于测量自上次接收到的信息更新生成以来所经过的时间。本文研究了在一般干扰约束和时变信道条件下网络的AoI最小化问题。我们研究的情况下,信道统计是已知的,但当前的信道状态是未知的。我们提出了两种调度策略,即基于虚拟队列的策略和基于年龄的策略。在基于虚拟队列的策略中,调度器调度具有虚拟队列长度的最大加权和的链路,而在基于年龄的策略中,调度器调度具有链路AoI的函数的最大加权和的链路。我们证明了基于虚拟队列的策略是峰值年龄最优的,添加剂常数,而基于年龄的策略是最多的因素4远离最佳年龄。数值结果表明,这两个建议的政策,事实上,非常接近最优。

英文摘要:

Age of information (AoI) is a recently proposed metric that measures the time elapsed since the generation of the last received information update. We consider the problem of AoI minimization for a network under general interference constraints, and time varying channel. We study the case where the channel statistics are known, but the current channel state is unknown. We propose two scheduling policies, namely, the virtual queue based policy and age-based policy. In the virtual queue based policy, the scheduler schedules links with maximum weighted sum of the virtual queue lengths, while in the age-based policy, the scheduler schedules links with maximum weighted sum of a function of link AoI. We prove that the virtual queue based policy is peak age optimal, up to an additive constant, while the age-based policy is at most factor 4 away from the optimal age. Numerical results suggest that both the proposed policies are, in fact, very close to the optimal.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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