US 8,804,525 B2 · Method and device for network traffic control

Abstract

A method and a device for network traffic control comprising the following steps: detecting actual downlink traffic of a network device; calculating an error e between the actual downlink traffic and predetermined downlink traffic; performing a calculation on the error to obtain PID output according to a PID control formula; calculating scaling of upstream traffic according to the calculated PID output and the downlink traffic; and regulating an upstream traffic threshold according to the scaling. The upstream traffic is increased or reduced in accordance with the actual downlink traffic be means of the correlated regulation and dynamic control of the upstream traffic and the downlink traffic of the network device. As such, traffic control is realized in those applications (e.g. UDP traffic such as P2P streaming media) which themselves lack the traffic control mechanism, and it is possible to make the best of network bandwidth as well.

Claims8

Dependent claims

A method for network traffic control at a network device, comprising the following steps:

detecting actual downlink traffic of the network device;
calculating, at a difference calculator, an error e between the actual downlink traffic and predetermined downlink traffic;
performing a calculation on the error to obtain PID output according to a PID (Proportion Integration Differentiation) control formula;
calculating scaling of upstream traffic according to the calculated PID output and the downlink traffic;
and
regulating an upstream traffic threshold according to the scaling;
wherein the PID control formula is a discrete one:
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wherein t=kT, T is a discrete sampling period, k is a natural number, kp is a proportional coefficient, ki is an integration time constant and kd is a differential time constant.

79 more elements

A device for network traffic control, wherein comprising:

a traffic detector, which is operable to detect actual downlink traffic of a network device;
a difference calculator, which is operable to calculate an error e between the actual downlink traffic and predetermined downlink traffic;
a PID controller, which is operable to perform a calculation on the error to obtain PID output according to a PID control formula;
a scaling calculator, which is operable to calculate scaling of upstream traffic according to the calculated PID output and the downlink traffic;
and
an upstream traffic regulator, which is operable to regulate an upstream traffic threshold according to the scaling;
wherein the PID control formula used by the PID controller is a discrete one:
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wherein t=kT T is a discrete sampling period, k is a natural number, kp is a proportional coefficient, ki is an integration time constant and kd is a differential time constant.

79 more elements

Dependencies are inferred from the claim text.

Method and device for network traffic control

Life of this patent

Method and device for network traffic control

Life of this patent

Abstract

Claims8