具有马尔可夫时变传输速率的用户调度

Fabio Cecchi, P. Jacko
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引用次数: 22

摘要

我们解决了开发具有无线连接到基站的用户的性能良好且可实现的调度程序的问题。这类实际系统的主要特点是用户信道的质量条件是时变的,由于不同的调制和编码方案,这些时变的质量条件转化为时变的传输速率。我们假设这种现象遵循马尔可夫定律,并且大多数讨论都致力于每个用户的三个质量条件的情况,为此我们描述了最优索引策略,并表明阈值策略(给予具有更高传输速率的用户更高优先级)不一定是最优的。对于任意数量质量条件的一般情况,我们设计了一个调度程序,并提出了它的两个实用的近似,并说明了所提出的基于索引的调度程序和现有的替代方案在各种模拟场景中的性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Scheduling of users with markovian time-varying transmission rates
We address the problem of developing a well-performing and implementable scheduler of users with wireless connection to the base station. The main feature of such real-life systems is that the quality conditions of the user channels are time-varying, which turn into the time-varying transmission rate due to different modulation and coding schemes. We assume that this phenomenon follows a Markovian law and most of the discussion is dedicated to the case of three quality conditions of each user, for which we characterize an optimal index policy and show that threshold policies (of giving higher priority to users with higher transmission rate) are not necessarily optimal. For the general case of arbitrary number of quality conditions we design a scheduler and propose its two practical approximations, and illustrate the performance of the proposed index-based schedulers and existing alternatives in a variety of simulation scenarios.
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