慢瑞利衰落信道下一种变分组长度的自适应ARQ协议  

An adaptive ARQ protocol with packet length changing for slow Rayleigh fading channels

作　　者：高明生[1] 陆佶人[1] 方世良[1] 

机构地区：[1]东南大学无线电工程系,江苏南京210096

出　　处：《通信学报》2004年第9期49-55,共7页Journal on Communications

基　　金：国家"十五"预研基金(10106050303)

摘　　要：信道的慢瑞利衰落特性导致通信系统的性能——吞吐量的下降。本文基于选择重传(SRARQ)与返回-n(GBN ARQ)相结合的混合ARQ协议(SR+GBN ARQ),依据发送方连续收到的确认(ACK)/非确认(NACK)消息的次数,正确评估慢瑞利衰落信道的状况以改变分组长度的一种自适应ARQ协议。仿真结果表明对于慢瑞利衰落、长往返旅程延迟(T)信道,该协议能取得较优的吞吐性能。The property of slow Rayleigh fading channels results in the dropping of the performance-throughput of communication systems. In this paper, based on the combination ARQ protocol (SR+GBN ARQ) of the selective-repeat (SR ARQ) plus go-back-n (GBN ARQ), an adaptive ARQ protocol with packet length changing according to the slow Rayleigh fading condition estimated with the number of continuous postive acknowledgments (ACK) or negative acknowledgments (NACK) received by the transmitter is presented. Simulation results indicate that the proposed protocol can obtain higher throughput performance for slow Rayleigh fading and large round trip delay (T) channels.

关 键 词：ARQ 慢瑞利衰落 分组长度 吞吐量 

分 类 号：TN913.21[电子电信—通信与信息系统]