A Resource Scheduling Algorithm Based on User Grouping for LTE-Advanced System with Carrier Aggregation
首发时间:2009-08-19
Abstract:This paper focuses on the resource scheduling of LTE-Advanced system with carrier aggregation. With different fading characters, the aggregated carriers have different coverage between each other. Consequently, the carrier aggregation leads to the fact that the number of carriers which users can be scheduled on is various. The allocation fairness can not be achieved with the original proportional fair (PF) scheduling algorithm, since the PF assumes that all users can be scheduled on the entire spectrum resources. Thus, a PF scheduling algorithm based on user grouping (UG-PF) is proposed. The users are partitioned into some specific groups according to the number of carriers that they can be scheduled on. Furthermore, a modified scheduling policy is obtained based on the average channel access probability of different user groups. Simulation results demonstrate that the UG-PF algorithm can accomplish better fairness among users with a little throughput degradation compared with the original PF algorithm.
keywords: LTE-Advanced carrier aggregation proportional fair user grouping
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一种支持载波聚合的LTE-Advanced系统中基于用户分群的资源调度算法
摘要:本文主要解决引入载波聚合技术以后LTE-Advanced系统中的资源调度问题。聚合的载波具有不同的衰落特性,这使得它们的覆盖范围也各不相同。因此,载波聚合技术使得不同的用户可调度到不同数目的载波上。然而,现有的比例公平调度算法是在所有用户都可共享全部频率资源这一前提条件下,才能获得较好的分配公平性。本文提出了一种基于用户分群的比例公平调度(UG-PF)算法,根据每个用户可调度的载波数将系统中的用户分为不同的用户群,并基于对不同用户群的平均信道接入概率的分析结果,得到了一个改进的资源调度策略。仿真结果表明,相比现有的比例公平调度算法,UG-PF算法可获得较好的分配公平性,且仅引起较小的吞吐量下降。
关键词: LTE-Advanced 载波聚合 比例公平 用户分群
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No.3455948860412506****
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一种支持载波聚合的LTE-Advanced系统中基于用户分群的资源调度算法
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