EFCI scheme with early congestion detection
First Claim
1. A method for detecting congestion in high speed network switches of a high speed network in order to optimize throughput, the method comprising:
- adapting low priority data traffic in response to a low frequency variation of high priority data traffic; and
eliminating low frequency, high magnitude low priority data traffic oscillations.
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Abstract
An adjustable bit rate (ABR) feedback control scheme is provided where the effects of multiloop delays and high priority traffic transmission are built into the control model. The data traffic is filtered by a low pass filter. Then, the low frequency bandwidth of the filtered traffic is measured and compared to a predetermined threshold. If the measured value exceeds the threshold, the ABR traffic flow is reduced. If the measured value is less than the threshold, the ABR traffic flow is increased. In addition, a General Prediction Control (GPC) method may be applied to the control model for optimal performance. An object of the invention is to minimize the unused link capacity subject to no congestion, where the ABR traffic is adapted to the low frequency variation of high priority traffic flow for high efficiency.
38 Citations
20 Claims
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1. A method for detecting congestion in high speed network switches of a high speed network in order to optimize throughput, the method comprising:
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adapting low priority data traffic in response to a low frequency variation of high priority data traffic; and
eliminating low frequency, high magnitude low priority data traffic oscillations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A computer readable medium storing a program for detecting congestion in high speed network switches to optimize throughput, the program comprising:
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an adaptation code segment that adapts low priority data traffic in response to a low frequency variation of high priority data traffic; and
an oscillating code segment that eliminates low frequency, high magnitude low priority data traffic oscillations. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification