Transmission Control Method for Tcp Bi-Directional Transmission In Asymmetric Bandwidth Pre-Allocated Subscriber Network And Apparatus Therefor
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United States of America Patent
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Issued Date -
Apr 17, 2008
app pub date -
Mar 10, 2006
filing date -
Mar 10, 2005
priority date (Note) -
Abandoned
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Abstract
A transmission control apparatus for improving PCT bi-directional transmission performance in an end node or gateway node of an asymmetric bandwidth pre-allocated subscriber network. The transmission control apparatus includes a TCP classification module for acquiring a TCP ACK packet to be transmitted over an uplink during bi-directional transmission; a band-width estimation/prediction module for estimating bandwidth of a downlink corresponding to the uplink at a time when the ACK packet is acquired, predicting following bandwidth of the downlink according to the estimated bandwidth, and calculating a optimal window size of the downlink such that the predicted bandwidth maintains residual bandwidth enough to allow transmission of an ACK packet over the downlink link compared with the maximum bandwidth allocated to the downlink; and a controller for inserting the calculated optimal window size as a reception window size included in the ACK packet and delivering the ACK packet to a destination node.
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