TCP - IP White Papers
Worst-Case Performance Limitation of TCP Sack and a Feasible Solution
Overview In the present implementation of Transmission Control Protocol (TCP) selective acknowledgment (SACK), every SACK block needs 8 bytes to carry information about the received packets, back to the sender. Since TCP Options field has a fixed length, there is a limit on the number of SACK block that can be carried by the acknowledgment packets. Under some error conditions, this limitation can force the TCP sender to retransmit packets that have already been received successfully by the receiver. This paper puts forward a proposal to modify the present SACK implementation, in order to prevent these unwanted retransmissions. The paper shows that the proposed implementation of SACK mechanism increases the throughput of SACK enabled TCP connections.
| Publisher | Institute of Electrical and Electronics Engineers | File Format | |
|---|---|---|---|
| Date Published | November 2002 | ||
| Format | White Papers | ||
| Topics | |||
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