提高带宽利用率和降低延时的动态带宽分配算法  

A Dynamic Bandwidth Allocation Algorithm of Improving Bandwidth Utilization and Reducing Packet Delay

作　　者：胡君香[1] 李兴明[1] 

机构地区：[1]电子科技大学通信与信息工程,成都611731

出　　处：《现代传输》2009年第3期68-72,共5页Modern Transmission

摘　　要：EPON(Ethernet Passive Optical Network)由于它的低成本和高带宽,一直被人们认为是下一代接入网的解决方案。而动态带宽分配算法(DBA)一直是人们研究的热点,本论文回顾了最近几年已提出的DBA算法,并提出一种新的提高带宽利用率和降低延时的DBA算法。OLT依据接收到的REPORT帧判断ONU缓存队列的大小,如果队列小于最大传输窗口则先授权。在仿真中可以看到采取此算法可以降低延时并提高了带宽利用率。EPON （Ethcrnct Passive Optical Network） is viewed by many as an attractive solution to the next gencration access network because of its low cost and high bandwidth. And dynamic bandwidth allocation algorithm （DBA） has been all area of intense research in recent years. In this paper most of the proposed DBAs are reviewed, and we propose a new DBA for improving bandwidth utilization and packet delay. OLT sent GATEs according to the REPORT which says the size of ONU queue. If the size of ONU queue is less than the maximum transmission window the ONU was authorized priority. In the simulation, we can scc this algorithm can reduce packet delay and improve bandwidth utilization.

关 键 词：EPON DBA 信道利用率 延时 

分 类 号：TN929.1[电子电信—通信与信息系统]