Method and apparatus for measuring flow capacity of and determining the optimal window size of a communications network
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United States of America Patent
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-
Mar 13, 2001
Grant Date -
N/A
app pub date -
Oct 29, 1997
filing date -
Oct 29, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The idle capacity of a packet network channel is dynamically estimated by transmitting only a single window of test packets at whatever window size is presently in use on the channel and by measuring the time intervals between acknowledgments (the inter-acknowledgment time) of adjacent packets. This value is used, for example, to dynamically allocate the idle bandwidth to applications. Preferably, an average value for the inter-acknowledgment time interval is calculated from all of the acknowledgment intervals associated with the window of packets. The idle capacity of the channel is then calculated from the formula C=1/I.sub.Avg, where C is the idle capacity in packets per second and I.sub.Avg is the average acknowledgment time between packets. Additionally, the same parameters that are collected to calculate the idle capacity are used to calculate the optimal window size, also on a dynamic basis.
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