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End-to-end low available bandwidth measuring method

A measurement method, bandwidth technology, applied in digital transmission systems, electrical components, transmission systems, etc.

Inactive Publication Date: 2007-08-29
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

The disadvantage of Stab is also that it is not suitable for measurements in the case of low available bandwidth

Method used

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  • End-to-end low available bandwidth measuring method
  • End-to-end low available bandwidth measuring method
  • End-to-end low available bandwidth measuring method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0077] Select probe package

[0078] (1) Detection packet type

[0079] The detection packet can be constructed according to certain rules by utilizing Internet protocols such as ICMP, UDP, or TCP protocols. However, in order to prevent denial of service (DOS) attacks, some routers limit the rate of ICMP packets to delay the return of response packets, and the widespread use of firewalls also invalidates the measurement method based on ICMP packet detection. However, the detection packets based on the TCP protocol are difficult to meet the requirements of online measurement, so the detection packets of this algorithm are UDP packets.

[0080] (2) Detection packet size

[0081] In many cases, it is usually preferred to use the packet with the maximum length allowed by the channel for measurement, based on the fact that larger packets are more resistant to background "noise" interference, but this single selection strategy makes the measurement results inaccurate. When the aver...

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Abstract

Through mutual cooperation between sending end and receiving end together the disclosed method accomplishes measuring work. The sending end is in charge of sending measurement packets in multiple speeds, and the receiving end is in charge of receiving measurement packets, and making statistics and analysis for bandwidth condition. The method uses detection sequence quick self-congestion algorithm, pseudo fluctuation filtration algorithm, quick feedback algorithm of self-adaptive detecting threshold, and detected value self-adapted quick smoothing algorithm etc. Comparing with each type of usable tool for measuring bandwidth, the disclosed method not only realizes better measuring effect on high usable bandwidth, but also realizes more accurate, quick measurement on low usable bandwidth. Advantages are: consuming low resources of network bandwidth, small influence on route of network to be measured.

Description

1. Technical field [0001] The invention relates to a method for measuring available bandwidth. The method is accurate and reliable, and not only can reflect a good measurement effect when the available bandwidth is high, but also can realize more effective and fast measurement under the condition of low available bandwidth. The bandwidth resources are low, and the impact on the network under test is small, which belongs to the bandwidth measurement field of the Internet. 2. Background technology [0002] Bandwidth is one of the most important resources of an IP network. As an important measurement parameter for evaluating a network, bandwidth directly affects network performance. Accurate estimation and measurement of bandwidth is one of the problems that must be solved in network operation and maintenance, and related measurement algorithms have always been a research hotspot and difficult problem in the field of network measurement. The IETF IPPM (Internet Engineering Tas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/26H04L12/56H04L29/06H04L12/24
Inventor 江虹黄玉清梁靓李云尤晓建胡辉吴斌
Owner SOUTHWEAT UNIV OF SCI & TECH
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