Modeling and simulation of an ABR flow control algorithm using a virtual source/virtual destination switch

摘要

The Available Bit Rate(ABR)service class of Asynchronous Transfer Mode networks uses a feed- back control mechanism to adapt to varying link capacities. The Virtual Source/Virtual Destination (VS/VD)technique offers the possibility to segment the otherwise end-to-end ABR control loop into separate loops. The improve feedback delay and the control of ABR traffic inside closed segments provide a better performance for ABR connections. This article will present the use of classical linear control theory to model and develop an ABR VS/VD flow control algorithm.