document: Modeling and simulation of an ABR flow control algorithm using a virtual source/virtual destination switch The available bit rate -LRB- ABR -RRB- service class of asynchronous transfer mode networks uses a feedback control mechanism to adapt to varying link capacities . The virtual source/virtual destination -LRB- VS/VD -RRB- technique offers the possibility of segmenting the otherwise end-to-end ABR control loop into separate loops . The improved feedback delay and control of ABR traffic inside closed segments provide a better performance for ABR connections . This article presents the use of classical linear control theory to model and develop an ABR VS/VD flow control algorithm . Discrete event simulations are used to analyze the behavior of the algorithm with respect to transient behavior and correctness of the control model . Linear control theory offers the means to derive correct choices of parameters and to assess performance issues , such as stability of the system , during the design phase . The performance goals are high link utilization , fair bandwidth distribution , and robust operation in various environments , which are verified by discrete event simulations . The major contribution of this work is the use of analytic methods -LRB- linear control theory -RRB- to model and design an ABR flow control algorithm tailored for the special layout of a VS/VD switch , and the use of simulation techniques to verify the result
doc_bio_tags: B O O O O B I I I O O O O O O O O O O O O O O O O O O O O O O B I I O O O O B I O O O O O O O O O O O O O O O O O O B I O O O O O O B I O O O O O O B I O O O O O O O O O O O O O O B I I I O O O O O O O O O O O B I I O O O O O O O O O O O O B I O O O O B I O O O O O O O O O O O O O O O O B I O O O B O O O O O O O O O O O O O B I I O B I I O O B I O O O O O O O O B I I O O O O O O O O O O O O O O O O O O O O O O O B I I I O O O O O O O O O O O O O O O O O O O O
extractive_keyphrases: modeling abr flow control algorithm feedback control mechanism link capacities control loop feedback delay closed segments classical linear control theory discrete event simulations transient behavior control model performance issues stability high link utilization fair bandwidth distribution robust operation
abstractive_keyphrases: virtual source/virtual destination switch atm networks available bit rate service class traffic control