基于TD-SCDMA HSDPA系统的增强型HARQ仿真  

Simulation of Enhancement HARQ for TD-SCDMA HSDPA Systems

作　　者：张军[1] 钱锟[1] 王映民[1] 

机构地区：[1]信息工程大学信息工程学院,河南郑州450002

出　　处：《信息工程大学学报》2006年第4期373-376,共4页Journal of Information Engineering University

基　　金：国家自然科学基金资助项目(NSF60172029)

摘　　要：首先提出了一种基于TD-SCDMA HSDPA系统的增强型HARQ(E-HARQ)技术,其基本思想是当链路质量比预置门限低时放弃重传并且改变调制和编码。E-HARQ能够减少不必要的重传,使得媒质接入控制(MAC)更高效,因此系统性能将得到提高。此外,文章还对高比公平调度(APFS)算法作了仿真,目的是保证长期与短期的公平性以及最大化系统吞吐量,在满足用户服务质量(QoS)的条件下,这种改进的自适应技术能够提高系统的吞吐量。In this paper, an enhancement HARQ（E-HARQ） method for TD-SCDMA supporting HSDPA techniques is proposed firstly. The basic idea is to discard the retransmission and change the modulation and coding when the llnk quality is lower than a pre-determined threshold. E-HARQ reduces unnecessary retransmissions and makes Medium Access Control（MAC）more efficient; hence the system performance will be improved. Furthermore, an advanced Proportionally Fair Scheduling （APFS）algorithm is proposed, which aims at guaranteeing the long-term and short-term fairness as well as maximizing the system throughput. These advanced adaptive techniques can improve the system throughput under the constraint of user＇s quality of service（QoS）.

关 键 词：TD-SCDMA HSDPA 高比公平调度算法 混合自动重传请求 自适应调制编码 

分 类 号：TN929.5[电子电信—通信与信息系统]