Multi-level Rate-based Flow Control for ABR Tra c
نویسندگان
چکیده
The rate control mechanism for Available Bit Rate ABR tra c as de ned by the ATM Forum does not distinguish between di erent types of ABR connections However since ABR tra c may result from a heterogeneous set of applications there is an apparent need for a ow control scheme that can distinguish between and give di erential treatment to di erent classes of ABR connections In this study a multi level ow control scheme for ABR tra c is proposed that performs ow control of ABR tra c simultaneously at three levels At the rst level the scheme determines the total available ABR bandwidth at a link At the second level the ABR bandwidth is distributed to di erent ABR tra c classes At the third level the scheme determines the bandwidth available to connections in same tra c class It is shown that the multi level ow control method completely decouples the explicit rate calculation of distinct tra c classes while achieving a high network utilization Extensive simulations demonstrate that the multi level ow control quickly adapts to load changes in the network
منابع مشابه
Switch Source End System Forward RM Cell Backward RM Cell Data Cell Switch Destination End System
The Available Bit Rate ABR service that is being standardized by the ATM Forum dynamically deter mines the maximum transmission rate the explicit rate of a connection A drawback of the dynamic control scheme for calculating the explicit rates is that it tries to allocate the same bandwidth to all ABR connections regardless of the application type of the connection In this study a multi level ex...
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