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arXiv 1507.01971cs.NIcs.ITmath.IT
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集中式无线接入网的计算感知和速率优化调度

Computationally Aware Sum-Rate Optimal Scheduling for Centralized Radio Access Networks

Peter Rost, Andreas Maeder, Matthew C. Valenti, Salvatore Talarico

摘要:

在集中式或云无线电接入网络中,一组若干无线电接入点的数字基带处理的某些部分在中央数据中心处执行。集中处理提高了计算资产的灵活性、可伸缩性和利用率。然而,性能关键取决于如何分配有限的数据处理资源以满足不同无线设备的需求。由于每个设备施加的处理负载取决于其分配的传输速率和信道质量,因此调度的速率分配方面应考虑可用的计算。在本文中,提出了两个计算感知的调度器,其目标是最大化系统的总速率,同时满足对所提供的计算负载的约束。第一调度器最优地分配资源,并且根据注水算法来实现。第二个调度器是次优的,但使用了一个更简单和直观的复杂性截止方法。这两个路由器的性能进行评估,使用LTE兼容的系统级模拟器。发现两个调度器都避免了由计算负载的溢出(即,计算中断),代价是和速率的轻微损失。

英文摘要:

In a centralized or cloud radio access network, certain portions of the digital baseband processing of a group of several radio access points are executed at a central data center. Centralizing the processing improves the flexibility, scalability, and utilization of computational assets. However, the performance depends critically on how the limited data processing resources are allocated to serve the needs of the different wireless devices. As the processing load imposed by each device depends on its allocated transmission rate and channel quality, the rate-allocation aspect of the scheduling should take into account the available computing. In this paper, two computationally aware schedulers are proposed that have the objective of maximizing the sum-rate of the system while satisfying a constraint on the offered computational load. The first scheduler optimally allocates resources and is implemented according to a water-filling algorithm. The second scheduler is suboptimal, but uses a simpler and intuitive complexity-cut-off approach. The performance of both schedulers is evaluated using an LTE-compliant system level simulator. It is found that both schedulers avoid outages that are caused by an overflow of computational load (i.e., computational outages) at the cost of a slight loss of sum-rate.

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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