AM-RLC机制的数据帧有序延时分析  

Analysis of in-sequence frame delay for the AM-RLC scheme

作　　者：江俊锋[1] 曹志刚[1] 郭子华[2] 

机构地区：[1]清华大学电子工程系,北京100084 [2]联想研究院,北京100085

出　　处：《清华大学学报（自然科学版）》2007年第10期1627-1630,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目(60472027)

摘　　要：为了避免已有的确认模式无线链路控制(AM-RLC)机制研究中不可实现的每隔一个传输间隔报告传送状态的假设,该文采用迭代的方法分析了AM-RLC机制的数据帧有序延时。先求解数据帧的传送状态及概率,然后求解相应的延时概率。分析结果表明:数据帧的有序延时与信道误帧率近似成线性增长关系,并且随着确认帧间隔增大而增大。分析结果还给出了改进AM-RLC协议的启示,即通过缩短数据帧单程延时或者动态调整确认帧间隔可以提高AM-RLC协议的性能。An iterative method was used to analyze the in-sequence frame delivery delay of the acknowledged mode-radio link control （AM-RLC） scheme without the impractical assumption of knowing the status report in each transmission time interval as in previous studies. The method first determines the frame transmission status and the probability of that status, and then determines the corresponding delay probability. Analysis results show that the frame delivery delay is linearly proportional to the frame error rate and increases with the acknowledgement interval. The analysis results also suggest how to enhance the AM-RLC scheme, i.e. by shortening the one-way delay of each frame and by dynamically changing the acknowledgement interval.

关 键 词：无线数据通信 链路控制 确认间隔 有序延时 

分 类 号：TN919.72[电子电信—通信与信息系统]