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http://dx.doi.org/10.7840/kics.2015.40.8.1542

Regulating Delayed ACK Timeout to Construct High Speed Transmission  

Lee, Joon Yeop (School of Electrical Engineering, Korea University)
Lee, Woonghee (School of Electrical Engineering, Korea University)
Kim, Hwangnam (School of Electrical Engineering, Korea University)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.40, no.8, 2015 , pp. 1542-1550 More about this Journal
Abstract
Delayed ACK is an algorithm implemented to decrease the number of ACK transmissions by delaying an ACK transmission and by waiting for additional ACK instead of transmitting the ACK immediately. By using Delayed ACK in TCP, the congestion of network and the overhead of handling ACKs can be reduced. Waiting time of Delayed ACK is defined as the Delayed ACK timeout, and it is fixed in Window OS basically. However, the fixed value of Delayed ACK timeout is not suitable for dynamic network circumstance, and it may cause unnecessary delay. This paper proposes a regulating Delayed ACK timeout algorithm to reduce the aforementioned unnecessary delay caused by the lengthy default value of the Delayed ACK timeout. We confirm that TCP transmission performance in dynamic network circumstance can be improved using the proposed algorithm.
Keywords
Data transmission; TCP; Delayed ACK; CWND; ATO;
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