DiffServ网络中基于流量负载的动态带宽分配

在DiffServ网络中,流量以聚集类的形式存在,聚集类中的流量负载是随时间不断地发生动态变化的.当不同聚集类中的流量负载与调度算法(如WFQ)为其分配的资源(如带宽)不成比例时,即使两个聚集类的优先级相同,它们中的数据包也会得到不公平的待遇.为此,DiffServ网络中面向公平的动态带宽分配引起了广泛的研究.本文中为了实现公平的带宽分配,提出了一种基于流量负载的动态带宽分配的方法,其中在动态计算各个聚集类应分得的新带宽时主要考虑了当前分得的带宽和聚集类的队列长度增量这两个因素.仿真实验结果说明了该方法的有效性.

Traffic Load- based Dynamic Bandwidth Allocation for Balancing the Packet Loss in DiffServ Network

Traffic load in the aggregate class of DiffServ network varies dynamically. However, when the traffic load proportion of dif- fereilt aggregate classes is not equal to the assigned weight proportion in the scheduling algorithm, such as the WFQ algorithm, the packets in different aggregate classes will receive unfair treatment, even though these classes have the same priority. Hence, research on fairness - oriented dynamic bandwidth allocation in DiffServ becomes very important. In this paper, in order to balance the packet loss for fair bandwidth allocation, we propose a traffic load -based dynamic bandwidth allocation approach, which especially considers both the current weight proportion and queue increment proportion for calculating the new weight proportion. Experiment shows the valid