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Support QoS multicast congestion control strategy and its application in a heterogeneous network research

Author: ChenZuo
Tutor: ZhouJianZhong
School: Huazhong University of Science and Technology
Course: System Analysis and Integration
Keywords: Multicast Congestion Control Quality of service Heterogeneous networks
CLC: TP393.07
Type: Master's thesis
Year: 2005
Downloads: 134
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Abstract


With the level of hardware and network technology improved, multicast applications has been developing rapidly. Network video conferencing, network audio / video broadcast, the stock market release, multimedia distance education, tele-consultation and so deep into every corner of people's daily life. Multicast Congestion Control Internet has also become an active area of ??research, as the effective protection of multicast applications, congestion control mechanism can not only improve the multicast stream on the network transmission quality, but also with other types of data streams to ensure equitable use of limited bandwidth . In the continuous development of information technology today, multicast and congestion control applications will undoubtedly have very good prospects. The topics to digital video compression technology, network technology and streaming media technology, video streaming and real-time control, focusing on designing a support RSVP (Resource ReSerVation Protocol) protocols and QoS (Quality of Service) initiative group policy control broadcast system model, and for the existing congestion control algorithms slow response to network conditions, resulting in throughput adjustment strategy suited to volatile real-time streaming and other issues, focusing on the real-time streaming congestion control and adjust the strategy of research, proposed Delay-based congestion judgment and penalty function upgrade with adjustment algorithm to achieve a real-time video streaming multicast and QoS guarantees active classification. The model system consists of video servers, the routing nodes and clients constituted by resource reservation protocol RSVP consultations and during transmission using RTP / RTCP packet carrying control information with ICMP Echo Request packet to extract QoS parameters, its analysis to determine the appropriate policy for the transport level using real-time control, to protect the network QoS, improve system speed of response on network conditions, reducing the transmission rate volatility, better way to solve the network congestion and instability data effective transmission as well as with other data streams fair bandwidth issue. This paper first introduces the multicast technology and its congestion control mechanism, combined with the subject objectives cut into the model system; described in detail on the next multicast congestion control and adjust the strategy of research, testing and simulation model of the system in heterogeneous networks Application; finally a detailed description of the control strategy in the system model specific design ideas and its implementation process, and the model system of the test results were analyzed. Thesis focused on the research and congestion control algorithm in the actual application of the model system. The final paper, the structural performance of the system and transmission control strategy made a summary and evaluation, and discuss the direction of future research work on heterogeneous networks, real-time video transmission development prospect.

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