TCP Congestion Control with ACK-Pacing for Vertical Handover(Network)
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概要
- 論文の詳細を見る
In this paper, we discuss TCP performance in a wireless overlay network where wireless LANs and cellular networks are integrated. In the overlay network, vertical handover, where a mobile node changes its access link during a session, is one of the most important technologies. When a vertical handover occurs, throughput performance of a TCP flow is degraded due to not only packet losses during the handover, but drastic change of its bandwidth-delay product. In this paper, we propose an ACK-pacing mechanism for TCP congestion control to improve the performance degradation. The proposed system is receiver-driven, so no modification is required to the mechanism of TCP sender. In the proposed system, a TCP receiver adjusts a transmission rate of ACKs according to the relationship between bandwidth-delay products before and after a handover. Since the ACK-clocking mechanism of TCP adjusts the transmission rate of TCP segments, the TCP receiver can seamlessly adjust its congestion window size to the new bandwidth-delay product. Computer simulation results show that the proposed system can improve the TCP performance during the vertical handover.
- 社団法人電子情報通信学会の論文
- 2007-04-01
著者
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Matsuda T
Department Of Information Systems Engineering Toyama Prefectural University
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Matsuda Toshihiro
Department Of Information Systems Engineering Toyama Prefectural University
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MATSUDA Takahiro
Graduate School of Engineering, Osaka University
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Matsushita Yosuke
Graduate School Of Science And Engineering University Of Toyama
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Yamamoto Miki
Kansai Univ. Suita‐shi Jpn
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Yamamoto Miki
Department Of Electrical Engineering And Computer Science Kansai University
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Yamamoto Miki
Faculty Of Engineering Science Kansai University
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Matsushita Yosuke
Graduate School Of Engineering Osaka University
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Yamamoto Miki
Faculty Of Engineering Kansai University
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Matsuda Takahiro
Osaka Univ. Suita‐shi Jpn
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Matsuda Takahiro
Graduate School Of Engineering Osaka University
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