Flow control in network devices

Details Flow control in network devices Flow control in network devices

2007-08-21

2007-08-21

Pham, Chi (Department: 2616)

Multiplex communications

Data flow congestion prevention or control

Control of data admission to the network

C370S235000, C370S253000, C370S356000, C370S395430, C370S413000, C370S468000

Reexamination Certificate

active

10325324

ABSTRACT:
Methods and apparatus are provided for controlling flow rates of a plurality of data packet flows into a queue4corresponding to a resource3of a network device1. The flows comprise a set7of non-responsive flows, and a set8of other flows which may comprise responsive flows and/or flows whose responsiveness is unknown. The flow rates are managed in accordance with a queue management scheme such that adjustments are made to each flow rate in dependence on excess bandwidth in the resource, the amounts of the adjustments being dependent on one or more adjustment parameters for each flow. An error signal is generated based on the deviation from a desired allocation ratio of the ratio of the total flow rates into the queue4for the sets of flows7, 8. At least one adjustment parameter for at least one flow is then varied in dependence on the error signal in such a manner as to reduce the aforementioned deviation. A closed-loop control scheme thus operates in conjunction with the underlying queue management scheme to promote fair bandwidth allocation even in the presence of a mix of responsive and non-responsive flows.

REFERENCES:
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