Queue length based ABR flow control system

Details Queue length based ABR flow control system Queue length based ABR flow control system

1997-03-19

1999-11-23

Olms, Douglas W.

Multiplex communications

Data flow congestion prevention or control

370230, 370234, H04J 116, H04J 314

Patent

active

059912669

ABSTRACT:
In an ATM network, a traffic management system is provided to allow simple nd effective implementation of rate-based available bit rate, or ABR, flow control at ATM switches, with the subject system using an innovative queue length based approach to calculate the cell rate that a source system can use to send cells. In one embodiment, the cell rate is calculated as an exponential function of the cell queue length at a switch, and the rate value is carried back to a source system via resource management, or RM, cells. The exponential rate calculation function provides a large stability region for a network for better flow control performance than other systems, with the subject system being easy to implement in ATM switches.

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