基于AOS协议信道复用机制的研究  

Research on virtual channel multiplexing based on AOS protocol

作　　者：马西飞 张志刚[1] 付宇卓[2] 刘婷[2] 

机构地区：[1]上海交通大学电子信息与电气工程学院,上海200240 [2]上海交通大学微电子学院,上海200240

出　　处：《信息技术》2014年第11期101-105,共5页Information Technology

摘　　要：虚拟信道复用机制影响了AOS协议实现效率,提出了一种新的动态自适应虚拟信道复用方法。该方法将包信道复用与虚拟信道复用综合考虑,对不同传输质量要求的虚拟信道采用不同的调度策略。在OPNET仿真平台上对整个协议和该算法进行了建模,在吞吐量、buffer使用深度、传输帧延时三个方面对仿真结果做了分析,并与时间片周期轮询和固定优先级调度算法做了比较,结果证明动态自适应调度算法能在保证平台网数据延时的前提下,最大化空间载荷数据的吞吐量,在延时方面能起到良好的均衡作用,满足不同类型数据的传输要求。Virtual channel multiplexing mechanism affecting efficiency of AOS protocol greatly, this paper proposed a novel adaptive dynamic multiplexing method. This method takes both packet channel multiplexing and virtual channel multiplexing into consideration and uses appropriate scheduling policies for different virtual channel with peculiar transmission quality requirement. Then model of the entire AOS protocol and scheduling algorithm on OPNET simulation platform is presented, and it selects the channel throughput,buffer using depth, latency as parameters, compares this method with fixed priority, time slice weighted polling scheduling algorithm. The results show that the adaptive dynamic scheduling algorithm can automatically adjust generation wait time based on output bandwidth to achieve a good balance between delay and MPDU multiplexing efficiency. Dynamic priority scheduling algorithm considers both the urgency,priority, and queue length of TF that can guarantee the real-time of the platform data and maximized the throughput of payload data. It plays a good role in a balanced the requirements of different types transmission data.

关 键 词：空间数据系统 AOS OPNET 虚拟信道复用 

分 类 号：TN911.7[电子电信—通信与信息系统]