Real-time Transmission Over Internet

• Main Author: Gao, Qi
• Format: Others
• Language: English
• Published: Linköpings universitet, Institutionen för systemteknik 2004
• Subjects: Technology; Quality of Service; Overprovisioning; Realtime; UDP; IP telephony; Videoconference; CBR; VBR; Poisson; Pareto; TEKNIKVETENSKAP; TECHNOLOGY
• Online Access: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2169

With the Internet expansion, real-time transmission over Internet is becoming a new promising application. Successful real-time communication over IP networks requires reasonably reliable, low delay, low loss date transport. Since Internet is a non-synchronous packet switching network, high load and lack of guarantees on data delivery make real-time communication such as Voice and Video over IP a challenging application to become realistic on the Internet. This thesis work is composed of two parts within real-time voice and video communication: network simulation and measurement on the real Internet. In the network simulation, I investigate the requirement for the network"overprovisioning"in order to reach certain quality-of-service. In the experiments on the real Internet, I simulate real-time transmission with UDP packets along two different traffic routes and analyze the quality-of- service I get in each case. The overall contribution of this work is: To create scenarios to understand the concept of overprovisioning and how it affects the quality-of-service. To develop a mechanism to measure the quality-of-service for real-time traffic provided by the current best-effort network.