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Research on Multirate Multicast Congestion Control Algorithms

Author: DongLiNa
Tutor: TanLianSheng
School: Central China Normal University
Course: Applied Computer Technology
Keywords: Multi-rate multicast Congestion Control Layered Multicast Global video quality
CLC: TP393.02
Type: Master's thesis
Year: 2006
Downloads: 111
Quote: 0
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Abstract


In recent years , multimedia applications occupy an increasingly important position in the Internet . If multiple users at the same time to receive the same multimedia data , multicast is the most effective way of a single point - to - multipoint data transmission . The traditional multicast send all the receiving end of a single rate . However, due to the different needs of Internet inherent heterogeneity and receiving end , making the single - rate multicast no longer apply. Single rate either makes slow receiving end congestion occurs or not be able to receive in accordance with the rate received makes fast receiving end and waste of resources. Therefore the receiving end can be received at different rates according to their respective receiving power and network bandwidth that is multi-rate multicast becomes a hot issue , especially in video applications . The core problem of multi-rate multicast multi-rate multicast congestion control algorithm . In this paper, the multi-rate multicast congestion control algorithm for the study, first introduced a multi-rate multicast congestion control algorithm of the two evaluation criteria : fairness and scalability , followed by analysis and discussion of the three categories of existing multi-rate multicast congestion control algorithm , proposed a way to improve the global video quality multi-rate multicast congestion control algorithm . This algorithm is driven to a receiving end , the source side regulation algorithm, mainly the improvement of the target layer rate adjustment on the source end . Taking into account the diversity of multicast applications , global quality factor GQI , take into account not only the satisfaction of the receiving end and adding layers of stability , and also consider the network bandwidth multicast group . Then this factor to minimize optimization goal to construct a layer rate allocation optimization problem and a feasible solution to this problem algorithm , the final simulation when using this factor as a standard to measure the global video quality of the multicast group , able to guarantee the target to be optimized to meet the user's needs .

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