一种基于OFDMA的组播单播联合自适应调度算法  

A Multicast and Unicast Traffic Integrated Adaptive Scheduling Algorithm in OFDMA Systems

作　　者：杜恩宽[1] 胡国荣[1] 

机构地区：[1]中国传媒大学广芯数字系统集成研究所,北京100024

出　　处：《电子学报》2010年第12期2944-2948,共5页Acta Electronica Sinica

基　　金：国家863高技术研究发展计划(No.2007AA01Z230)

摘　　要：面向未来的大型多媒体组播应用环境,在IEEE 802.16业务分类的基础上,提出了名为VARTUL的业务分类及制约关系,在此基础上,研制了基于OFDMA的VARTUL节能调度算法,力求终端休眠时间最长,切换次数最少.算法中组播和单播共存,在制约前提下支持大量级用户的自由订阅,从而支持广播电视业务与数据业务的融合与运营.实验仿真表明,VARTUL算法能自适应上下行流量变化和各业务流量分布,支持各种业务组合,确保用户体验,并节约终端能量.For the applications＇ needs of the future large-scale multimedia multicast system, consulting the service class of IEEE 802.16,proposal a novel service class with some restrict rules, then develop an energy efficient scheduling algorithm called VARTUL based on OFDMA,make best efforts to help mobile station prolong the time in sleep mode and reduce the limes of mode switch. In this algorithrn, tmicast traffic coexist with multicast traffic, tollowing the restrict rules and then users can subscribe the services freely, so VARTUL can support the system which merge broadcast services and data services into one platform to provide video, audio, data and other programs. Numerical results show that VARTUL is adaptive to meet the instance of uplink and downlink traffic ratio variety and random distributing of service traffic,and it can save energy significantly and guarantee the service combinations and service experience of every user.

关 键 词：节能算法 VARTUL业务分类 联合调度 

分 类 号：TN929.5[电子电信—通信与信息系统]