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Rate limiting through dynamic autocorrection

A rate control, bit number technology, applied in the field of improving bit rate limitation, can solve the problems of large rounding error, low rate of token refilling, etc.

Inactive Publication Date: 2005-05-18
FOURSTICKS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If a small fraction of tokens are missed at a time, the cumulative effect over time may be a large rounding error, especially if tokens are refilled at a low rate

Method used

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  • Rate limiting through dynamic autocorrection
  • Rate limiting through dynamic autocorrection
  • Rate limiting through dynamic autocorrection

Examples

Experimental program
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Embodiment Construction

[0020] Referring to the Figures in detail, a Y-axis 113 representing the number of transmitted bits is shown. X-axis 114 represents time. In the system, time is quantified. The size of the quantum is chosen as the larger time length that will be used to transmit the largest packet allowed within the system or the kernel time resolution of the system. figure 1 Continuous time quanta 107, 108, 109 and 110 are shown. It also shows successive time quanta 111 and 112 separated by a time interval greater than one time quantum.

[0021] Line 106 represents the selected bit rate of the output link. This is also the bounded minimum number of bits the system is allowed to send in any quantum of time. For the first time quantum the number of bytes allowed to be transmitted 103 is the same as the minimum level, in the second time quantum the upper limit of the number of packets that can be sent remains unchanged. In this second time quantum, when the number of bits that have been tra...

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PUM

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Abstract

A packet-switching arrangement for effectuating rate control of the acceptance of packets that have occurred for transmission over an output channel, including: calculation of automatic correction factors allowing precise rate control, limiting traffic while also limiting underutilization.

Description

technical field [0001] The present invention relates to improved bit rate limitation in packet switched arrangements. Background technique [0002] Known is Token Bucket Filtering (TBF) which limits the channel bit rate. [0003] TBF has a conceptual bucket that is filled with tokens at a set rate until the bucket's upper limit is reached. For a channel to be able to send packets, it must acquire enough tokens to be able to send packets. These tokens are discarded once the packet has been sent. If the channel cannot get all the required tokens, it must wait to fill the bucket with more tokens before sending. [0004] There are two main problems with specific rate limiting situations. [0005] First, because buckets can hold a large number of tokens, TBF filtering allows traffic to burst above the rate at which the bucket is filled for a period of time before it stabilizes at the rate at which tokens are replenished. [0006] Another problem is that it may be imprecise s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L47/21
CPCH04L47/10H04L47/215
Inventor 埃米尔·蒂勒奇·肯特·拉姆
Owner FOURSTICKS