Improvements in TCP Robustness for Asymmetric Bandwidth

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概要

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• The Transmission Control Protocol (TCP) proves degraded performance at the environment which has bandwidth asymmetry, since the uplink is filled with ACK packets. In order to solve the issue, we present a TCP option, Pulsed ACK. To apply this option, TCP brings down the number of ACKs and allows receivers to send ACKs at intervals. We consider d, the number of data packets acknowledged by an ACK to achieve these effects, and using this value, receivers adjust the interval of sending them. The senders also control the increment of cwnd at the recerpt of an ACK packet so that it increases by 1 every RTT. For evaluation we use computer simulations. The results show that TCP with the Pulsed ACK option gains 1.85 times higher throughput compared to TCP without the option.

• 2006-09-14

著者

• Shigeno Hiroshi

  Faculty Of Science And Technology Keio University

• TANAKA DAIGO

  Graduate School of Science and Technology, Keio University

• Tanaka Daigo

  Graduate School Of Science And Technology Keio University

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