混合ARQ机制的性能分析  

Analysis of the Performance of ARQ Schemes

作　　者：任艳颖[1] 张文军[1] 王彬[1] 

机构地区：[1]上海交通大学图像通信与信息处理研究所,上海200030

出　　处：《计算机工程与应用》2003年第32期13-14,72,共3页Computer Engineering and Applications

基　　金：国家863高技术研究发展计划项目(编号:2003AA103810)

摘　　要：高速无线数据服务的需求的增长,要求下一代无线网络显著提高其吞吐量。文章研究了自动重发请求(ARQ)机制,来满足这些新的要求。针对基于速率兼容纠错码的速率自适应I类混合ARQ机制和增量冗余重传II类混合ARQ机制,提出了一种系统框架,并对其在无线瑞利衰落信道上的性能进行了分析。数值结果表明,增量冗余重传(IRR)II类HARQ机制与速率自适应(RA)I类HARQ机制相比,有较高的吞吐量,而RAI类HARQ机制的延迟较小。The dramatic increase in demand for high speed wireless data services requires the next generation wireless networks to significantly improve the throughput.This paper investigates automatic repeat request(ARQ)schemes to meet these new challenges.An analytical framework is presented for the performance of rate-adaptive type-I and incremental redundancy retransmission type-II hybrid ARQ protocols based on rate compatible error correcting codes over fading channels.The numerical results show that incremental redundancy retransmission type-II hybrid ARQ schemes achieve notably better throughput than the rate-adaptive type-I hybrid ARQ scheme ,while the type-I hybrid ARQ scheme has smaller delay.

关 键 词：增量冗余重传 速率自适应 混合 ARQ 

分 类 号：TN915.2[电子电信—通信与信息系统]