TY - GEN
T1 - A survey of transport layer protocols suited for real-time data delivery over Diffserv-capable networks
AU - Noda, Y.
AU - Sakai, T.
AU - Shigeno, H.
AU - Okada, K.
AU - Matsushita, Y.
N1 - Publisher Copyright:
© 2002 IEEE.
PY - 2002
Y1 - 2002
N2 - As the Internet evolves toward the global multiservice network of the future, a key consideration is the support for services with guaranteed quality of service (QoS). The current Internet has a number of barriers to QoS support for real-time data delivery. The proposed differentiated services (Diffserv) framework is seen as the key technology to achieve this. This paper examines standard transport layer protocols, i.e. UDP and TCP, suited for real-time data delivery over Diffserv-capable networks where bandwidth guarantees are provided. We designed a streaming video application that buffers a portion of data on the receiver before starting the playback and operates in a streaming mode. Streaming media applications currently used in the Internet adopt UDP because of the general belief that TCP's reliable delivery mechanisms, such as congestion control and retransmission, are unsuitable for time-sensitive delivery. However, TCP shows the better simulation results than UDP when packets are lost over Diffserv networks. In our simulation, TCP can adapt its sending rate to the guaranteed bandwidth and the buffer on the receiver allows TCP to retransmit lost packets before the playback. As for TCP, the employment of SACK option that can recover lost packets efficiently contributes to a better performance.
AB - As the Internet evolves toward the global multiservice network of the future, a key consideration is the support for services with guaranteed quality of service (QoS). The current Internet has a number of barriers to QoS support for real-time data delivery. The proposed differentiated services (Diffserv) framework is seen as the key technology to achieve this. This paper examines standard transport layer protocols, i.e. UDP and TCP, suited for real-time data delivery over Diffserv-capable networks where bandwidth guarantees are provided. We designed a streaming video application that buffers a portion of data on the receiver before starting the playback and operates in a streaming mode. Streaming media applications currently used in the Internet adopt UDP because of the general belief that TCP's reliable delivery mechanisms, such as congestion control and retransmission, are unsuitable for time-sensitive delivery. However, TCP shows the better simulation results than UDP when packets are lost over Diffserv networks. In our simulation, TCP can adapt its sending rate to the guaranteed bandwidth and the buffer on the receiver allows TCP to retransmit lost packets before the playback. As for TCP, the employment of SACK option that can recover lost packets efficiently contributes to a better performance.
UR - http://www.scopus.com/inward/record.url?scp=84994234216&partnerID=8YFLogxK
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U2 - 10.1109/ICDCSW.2002.1030786
DO - 10.1109/ICDCSW.2002.1030786
M3 - Conference contribution
AN - SCOPUS:84994234216
T3 - Proceedings - International Conference on Distributed Computing Systems
SP - 305
EP - 310
BT - Proceedings - 22nd International Conference on Distributed Computing Systems Workshops, ICDCSW 2002
A2 - Wagner, Roland
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 22nd International Conference on Distributed Computing Systems Workshops, ICDCSW 2002
Y2 - 2 July 2002 through 5 July 2002
ER -