一种跨层的OFDMA系统调度和资源分配算法  

A Cross-Layered Scheduling and Resource Allocation Algorithm in OFDMA Systems

作　　者：郝丹丹[1] 李永华[2] 张瀚峰[2] 邹仕洪[1] 程时端[1] 

机构地区：[1]北京邮电大学网络与交换技术国家重点实验室,北京100876 [2]北京邮电大学信息学院,北京100876

出　　处：《电子学报》2008年第10期1923-1930,共8页Acta Electronica Sinica

基　　金：国家973重点基础研究发展规划(No.2003CB314806;No.2006CB70134);国家自然科学基金(No.60603060;No.60472067;No.90604019)

摘　　要：针对OFDMA系统下行链路资源分配和调度问题,提出了一种基于跨层设计的时频二维分配算法(CLSA),在资源分配同时考虑用户物理信道状态信息以及MAC和数据链路层的用户速率要求、延时要求、分组差错率要求等QoS需求,以提高系统吞吐性能以及中断率性能做为算法的设计目标.通过大量的仿真实验验证算法的性能,并与现有的经典算法(OFDMA系统中的MPF算法和M-LWDF算法)性能进行了对比分析.仿真实验结果表明,CLSA算法在系统有效吞吐性能和中断率性能方面有较好表现.A cross-layered time-frequency scheduling and resource allocation algorithm, CLSA, is proposed for downlink in OFDMA systems. The CLSA aims at improving system throughput and outage. Besides, some other QoS melrics were considered too, such as physical channel state information as well as users＇requirements on throughput, delay and packet error rate （PER）. The performance of CLSA and related analysis were evaluated by amounts of simulations. Compared with the classic algorithms, the Modified Proportional Fair （MPF） algorithm and the Modified Largest Weighted Delay First （M-LWDF） algorithm,CLSA shows excellent performance in system effective throughput and outage of OFDMA system in simulations.

关 键 词：正交频分多址 资源分配 调度算法 跨层 性能 

分 类 号：TN929.5[电子电信—通信与信息系统]