Presentation 2005-07-14
Performance Evaluation of a QoS Mechanism in TCP Overlay Networks
Hideyuki SHIMONISHI, Tutomu MURASE,
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Abstract(in English) We propose "TCP overlay network" to attain high quality communications without modifying the underlying IP networks. TCP overlay network is based on relay TCP sessions having intended behaviors, i.e., a user TCP session is terminated in the network and it is relayed by specialized TCP sessions providing specific services. In this paper, we evaluate an overlay QoS mechanism, which relays low-priority sessions by using low priority TCP(TCP Westwood Low-Priority) to differentiate transmission quality of user sessions. The simulation results show that, by applying TCPW-LP for low-priority TCP transfers, transmission delay of RTP packets are almost halved and losses of RTP packets are suppressed. In addition, by choosing different kinds of TCPs, including TCPW-LP and regular TCP, and tuning its control parameters, TCP sessions are appropriately differentiated based on the application's requirement.
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Keyword(in English) TCP / QoS / Overlay network / Low-priority / TCP-Westwood
Paper # IN2005-29
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Committee IN
Conference Date 2005/7/7(1days)
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Language JPN
Title (in Japanese) (See Japanese page)
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Title (in English) Performance Evaluation of a QoS Mechanism in TCP Overlay Networks
Sub Title (in English)
Keyword(1) TCP
Keyword(2) QoS
Keyword(3) Overlay network
Keyword(4) Low-priority
Keyword(5) TCP-Westwood
1st Author's Name Hideyuki SHIMONISHI
1st Author's Affiliation System Platforms Laboratories, NEC Cooperation()
2nd Author's Name Tutomu MURASE
2nd Author's Affiliation System Platforms Laboratories, NEC Cooperation
Date 2005-07-14
Paper # IN2005-29
Volume (vol) vol.105
Number (no) 178
Page pp.pp.-
#Pages 5
Date of Issue