VBR背景业务下的ABR拥塞特性

Congestion Characteristics of ABR Service inthe Presence of VBR Background Traffic

ＡＢＲ业务的拥塞控制方案是当前ＡＴＭ研究方面的热点．本文首先分析了存在ＶＢＲ背景业务时，ＡＢＲ拥塞控制方案的动态特性，然后将此分析模型用于研究明确速率反馈交换机的排队性能，并研究了ＴＣＰｏｖｅｒＡＢＲ的拥塞特性．

Recently,the congestion control for ABR(Available Bit Rate)service is studied extensively.This paper analyzes the performance of the ABR congestion mechanism in the presence of VBR (Variable Bit Rate) traffic,then applies the analysis model obtained to the analysis of the queuing performance of ER switches.Finally,this paper studies the characteristics of congestion when TCP is over ABR service in ATM networks.