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Titolo:
PERFORMANCE EVALUATION OF UDP TRAFFIC AFFECTED BY TCP FLOWS
Autore:
HORI Y; SAWASHIMA H; SUNAHARA H; OIE Y;
Indirizzi:
KYUSHU INST DESIGN FUKUOKA 8158540 JAPAN NARA PREFECTURAL INST IND TECHNOL NARA 6308031 JAPAN NARA INST SCI & TECHNOL NARA 6300101 JAPAN KYUSHU INST TECHNOL IIZUKA FUKUOKA 8200067 JAPAN
Titolo Testata:
IEICE transactions on communications
fascicolo: 8, volume: E81B, anno: 1998,
pagine: 1616 - 1623
SICI:
0916-8516(1998)E81B:8<1616:PEOUTA>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Keywords:
PACKET LOSS; UDP; TCP; WAN; REAL-TIME COMMUNICATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
10
Recensione:
Indirizzi per estratti:
Citazione:
Y. Hori et al., "PERFORMANCE EVALUATION OF UDP TRAFFIC AFFECTED BY TCP FLOWS", IEICE transactions on communications, E81B(8), 1998, pp. 1616-1623

Abstract

On wide area networks (WANs), UDP has likely been used for real-time applications, such as video and audio. UDP supplies minimized transmission delay by omitting the connection setup process, flow control, andretransmission. Meanwhile, more than 80 percent of the WAN resources are occupied by Transmission Control Protocol (TCP) traffic. As opposed to UDP's simplicity, TCP adopts a unique flow control mechanism withsliding windows. Hence, the quality of service (QoS) of real-time applications using UDP is affected by TCP traffic and its flow control mechanism whenever TCP and UDP share a bottleneck node. In this paper, the characteristics of UDP packet Loss are investigated through simulations of WANs conveying UDP and TCP traffic simultaneously. In particular, the effects of TCP flow control on the packet loss of real-time audio are examined to discover how real-time audio should be transmittedwith the minimum packet loss, while it is competing with TCP traffic for the bandwidth. The result obtained was that UDP packet loss occursmore often and successively when the congestion windows of TCP connections are synchronized. Especially in this case, the best performance of real-time audio applications can be obtained when they send-small sized packets without reducing their transmission rates.

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Documento generato il 29/09/20 alle ore 19:31:18