Scalable flow control for multicast ABR services in ATM networks
Xi Zhang; Shin, K.G.; Saha, D.; Kandlur, D.D.
Networking, IEEE/ACM Transactions on
Volume 10, Issue 1, Feb 2002 Page(s):67 - 85
Digital Object Identifier 10.1109/90.986538
Summary:We propose a flow-control scheme for multicast ABR services in ATM
networks. At the heart of the proposed scheme is an optimal second-order
rate control algorithm, called the α-control, designed to deal
with the variation in RM-cell round-trip time (RTT) resulting from
dynamic drift of the bottleneck in a multicast tree. Applying
two-dimensional rate control, the proposed scheme makes the rate process
converge to the available bandwidth of the connection's most congested
link sensed by the traffic source. It also confines the buffer occupancy
to a target regime bounded by a finite buffer capacity as the system
enters the equilibrium state. It works well irrespective of the topology
of the multicast tree. Using the fluid analysis, we model the proposed
scheme and analyze the system dynamics for multicast ABR traffic. We
study the convergence properties and derive the optimal-control
conditions for the α-control. The analytical results show that the
scheme is stable and efficient in the sense that both the source rate
and bottleneck queue length rapidly converge to a small neighborhood of
the designated operating point. We present simulation results which
verify the analytical observations. The simulation experiments also
demonstrate the superiority of the proposed scheme to the other schemes
in dealing with RM-cell RTT and link-bandwidth variations, achieving
fairness in both buffer and bandwidth occupancies, and enhancing average
throughput
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