一种前向共享信道下多业务的分层混合调度策略  

Layered hybrid scheduling scheme for multi-class services in foreward shared channel

作　　者：罗兴国[1] 赵海波[1] 唐晓梅[1] 

机构地区：[1]解放军信息工程大学信息工程学院,郑州450002

出　　处：《计算机工程与应用》2007年第22期126-128,共3页Computer Engineering and Applications

基　　金：国家高技术研究发展计划(863)(the National High-Tech Research and Development Plan of China under Grant No.MII-C3G-863-317-03-01-02-20)。

摘　　要：前向采用共享信道方式的系统在承载多种业务时,单一的调度算法很难满足所有业务的QoS需求。在介绍了前向共享信道分组调度的模型后;论文依据不同类别业务的传输需求,提出一种两层的混合调度策略,该策略按业务类别对分组进行分类缓存,并按比例将传输时隙分配到各个数据类,而各数据类采用先到先服务、保证带宽的或是比例公平的调度来实现按用户的分组发送;最后,通过仿真实验对该策略的有效性进行了验证。In order to fulfill the appropriate transmission of multi-class services packets in a foreward shared channel,this paper proposes a two-layer hybrid scheduling scheme on the base of analysis of the QoS attributes of four traffic types proposed by 3GPP/3GPP2.In the first layer this scheme classifies the packets into three types：stringent real-time,real-time and unreal-time, and assigns them transmission slot in turn;in the second layer three distinct schedulers buffer and transmit users＇ packet separately,these are First Come First Service,bandwidth guaranteed and proportional fair scheduling algorithm.Simulation results validate the performance of the proposed scheduling algorithm.

关 键 词：调度算法 前向共享信道 多业务 服务质量 

分 类 号：TN929.5[电子电信—通信与信息系统]