Method and apparatus for reducing TCP frame transmit latency
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United States of America Patent
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Mar 10, 2009
Grant Date -
Oct 20, 2005
app pub date -
Apr 19, 2004
filing date -
Apr 19, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
An alternate checksum option for transmitting TCP frame data is used that does not require computing a TCP checksum. Instead, an integrity check value is computed and placed in the ESP authentication portion near the end of the frame. Transmission of a portion of the TCP frame data may begin before all of the TCP frame data is received by a TCP checksum offload device because the integrity check value is inserted at the end of the frame. Furthermore, the integrity check value is computed using a static key or a dynamic key may be computed to cover a greater portion of the frame compared with ESP authentication specified by the IPsec standard.
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