A simple method of ATM ABR congestion control

We present a method to avoid congestion of ABR (available bit rate) traffic in ATM (asynchronous transfer mode) networks using the end-to-end delay experienced by resource management (RM) cells. When the forward RM cells leave the source, the source records the departure time and when they return to the source after traversing the network from source to destination and back, the source records the arrival time. The difference of these two is the round trip time (RTT). The RTT is used to control the cell admission rate by the source. In contrast to other work, this method does not need any measurement inside the network. We have studied the performance of the controller via simulations on OPNET.