TCP CAE: an improved congestion control using comparative ACK-based estimator |
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Authors: | Kim Jaehyun Choo Hyunseung Kim Dongsoo S |
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Affiliation: | 1.Communications Technology Solution Development Group, Samsung Data System (SDS), Seoul, Korea ;2.School of Information and Communication Engineering, Sungkyunkwan University, Suwon, Korea ;3.Electrical and Computer Engineering, Indiana U. Purdue U. Indianapolis, Indianapolis, IN, 46202, USA ; |
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Abstract: | TCP receivers deliver ACK packets to senders for reliable end-to-end transfer. However, due to network congestion in the backward
direction, ACK packets may not be successfully transferred, which causes the degradation of TCP performance. To overcome this
problem, this paper proposes a reverse congestion warning mechanism and a congestion handling mechanism in heterogeneous networks
with heavy background traffic in the backward direction. In the proposed scheme, senders detect the reverse direction congestion
and execute an exponential backoff algorithm in advance instead of waiting for RTO expiration. According to the simulation
results using the NS-2 network simulator, the proposed scheme shows a performance elevation of 20% than Reno, 150% than New
Reno, and 450% than Westwood, respectively, under heterogeneous networks and that the error rate of the radio link is 1% when
the backward network is congested. |
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Keywords: | |
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