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학술지 ER-TCP (Exponential Recovery-TCP): High-Performance TCP for Satellite Networks
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박만규, 신민수, 오덕길, 안도섭, 김병철, 이재용
IEICE Transactions on Communications, v.E95-B no.5, pp.1679-1688
일본, 전자정보통신학회 (IEICE)
12PR2900, 채널 적응형 실감위성방송 전송기술 개발, 오덕길
A transmission control protocol (TCP) using an additive increase multiplicative decrease (AIMD) algorithm for congestion control plays a leading role in advanced Internet services. However, the AIMD method shows only low link utilization in lossy networks with long delay such as satellite networks. This is because the cwnd dynamics of TCP are reduced by long propagation delay, and TCP uses an inadequate congestion control algorithm, which does not distinguish packet loss from wireless errors from that due to congestion of the wireless networks. To overcome these problems, we propose an exponential recovery (ER) TCP that uses the exponential recovery function for rapidly occupying available bandwidth during a congestion avoidance period, and an adaptive congestion window decrease scheme using timestamp base available bandwidth estimation (TABE) to cope with wireless channel errors. We simulate the proposed ER-TCP under various test scenarios using the ns-2 network simulator to verify its performance enhancement. Simulation results show that the proposal is a more suitable TCP than the several TCP variants under long delay and heavy loss probability environments of satellite networks. Copyright © 2012 The Institute of Electronics, Information and Communication Engineers.
And performance evaluation, Congestion control, Satellite networks, TCP variant
KSP 제안 키워드
Additive increase multiplicative(AIMD), Additive increase multiplicative decrease (AIMD) algorithm, Advanced Internet services, Available bandwidth estimation, Congestion Avoidance, Congestion Window, Congestion control algorithm, High performance, Information and communication, Long propagation delay, Loss probability