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Mid-Term frequency domain scheduler for resource allocation in wireless mobile communications systems

机译:用于无线移动通信系统中资源分配的中期频域调度程序

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This article approaches the dynamic resource allocation problem for the downlink of a wireless mobile communication system (WMCS). The article defines the architecture and functions of the global resource scheduler, as well as the quality index for scheduling, the signal to interference-plus-noise ratio (SINR). The proposed approach divides the scheduling task into two components: a distributed one, with local, short-term scope; and a centralized one, with global, medium-term scope. The optimization model considers a set of slack variables for guaranteeing feasibility. This allows the service provider to fully satisfy the users' service demands. The model type is mixed, non-linear, which demands large computational power for an exact solution. So an approximate strategy is used, in order to decouple the search space. The time limit imposed to reach a solution forces to define a reduced neighborhood structure. Thus, the obtained results are the best solution obtained in the allotted time interval, evaluating a suitable set of neighbors, and using an objective, effective criterion for searching. The solution offers high levels of full service satisfaction (greater than 97%), low levels of service denial (less than 2%), and efficient power usage (30% in average). (C) 2016 Elsevier B.V. All rights reserved.
机译:本文探讨了无线移动通信系统(WMCS)下行链路的动态资源分配问题。本文定义了全局资源调度程序的体系结构和功能,以及用于调度的质量指标,信噪比(SINR)。所提出的方法将调度任务分为两个部分:分布式的,具有本地短期范围;和一个集中的,具有全球性的中期范围。优化模型考虑了一组松弛变量以保证可行性。这使得服务提供商可以完全满足用户的服务需求。模型类型是混合的,非线性的,需要大量的计算能力才能获得精确的解决方案。因此,为了使搜索空间解耦,使用了近似策略。为了达到解决方案而施加的时间限制要求定义缩小的邻域结构。因此,获得的结果是在分配的时间间隔内获得的最佳解决方案,它评估一组合适的邻居,并使用客观有效的标准进行搜索。该解决方案可提供高水平的完全服务满意度(大于97%),低水平的服务拒绝(小于2%)和有效的功率使用(平均30%)。 (C)2016 Elsevier B.V.保留所有权利。

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