流星余迹通信中混合自动请求重传机制的网络时延性能分析  

Analysis of delay performance of hybrid automatic repeat request in meteor burst communication

作　　者：夏冰 李琳琳 郑燕山 

机构地区：[1]火箭军工程大学信息工程系,西安710025

出　　处：《计算机应用》2016年第11期3039-3043,共5页journal of Computer Applications

基　　金：国家863计划项目(2012AA7010213)~~

摘　　要：针对流星余迹通信系统建模仿真过程中,由混合自动请求重传(HARQ)机制引起的网络时延问题,提出基于HARQ的传输时延估算模型。首先,结合流星余迹通信的网络结构和信道特征,通过分析HARQ的基本原理,建立了流星余迹通信中HARQ的网络时延模型;然后利用排队论的相关理论,引入HARQ的改进机制,提出了Ⅰ型HARQ和Ⅱ型HARQ的传输时延估算模型;最后,通过仿真实验对两种HARQ的传输时延性能进行了对比分析,在改变分组传输正确率和分组时间长度的条件下,Ⅱ型HARQ的传输时延均比Ⅰ型HARQ小。实验结果表明:流星余迹通信中Ⅱ型HARQ比Ⅰ型HARQ具有更好的网络时延性能。In modeling and simulation of meteor burst communication system, concerning the problem of network delay caused by Hybrid Automatic Repeat Request （HARQ）, an estimation model of transmission delay based on HARQ was proposed. Firstly, in consideration of the network structure and channel characters in meteor burst communication, a network delay model was constructed by analyzing the theory of HARQ. Then, based on queuing theories, the improvement mechanism of HARQ was introduced to establish an estimation model of transmission delay of Type- I HARQ and one of Type- II HARQ. Finally, the simulation was realized to compare and analyze the transmission delay performance of two kinds of HARQ. When packet transmission accuracy or packet transmission time changes independently, the transmission delay of Type- II HARQ is less than that of Type- I HARQ. The experimential results show that Type-II HARQ has advantages of network delay performance in meteor burst communication compared to Type- I HARQ.

关 键 词：流星余迹通信 网络结构 混合自动请求重传 时延模型 排队论 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]