Method for measuring the available bandwidths of a link and...

Details Method for measuring the available bandwidths of a link and... Method for measuring the available bandwidths of a link and...

2011-01-25

2011-01-25

Mills, Donald L (Department: 2462)

Multiplex communications

Data flow congestion prevention or control

Flow control of data transmission through a network

C370S252000

Reexamination Certificate

active

07876687

ABSTRACT:
The present invention provides a method for measuring the available bandwidth of a link and a method for measuring the available bandwidth of a network. By sending quartets in pair and measuring intervals of probe packets at the probe receiving end, the available bandwidth of any link in a network can be measured and the characteristics of load changes in a given link can be tracked and analyzed. Or, the available bandwidths of a network within given sources and destinations can be measured and the input/output bandwidth of the network or the changes in cross traffic can be found out. The present invention can be applied to trouble shooting in links and networks, capacity planning, QoS (Quality of Service) control or QoS service level agreement verification, load balancing, re-route and detection and mitigation of network attacks and in many other fields. It can also be used for measuring the available bandwidth of a path even if there is more than one link of the minimum capacity on the path or when the link of the minimum capacity is not the link of the minimum available bandwidth.

REFERENCES:
patent: 2005/0232227 (2005-10-01), Jorgenson et al.
Attila Pasztor and Darryl Veitch, Active Probing using Packet Quartets, 2002 ACM ISBN 1-58113-X/02/0011.

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