Dissertation > Industrial Technology > Radio electronics, telecommunications technology > Wireless communications

Study and Improvement of the Streaming Media in Wireless Network Transmission Quality

Author ChenRongZhen
Tutor ZhouZuRong
School Qingdao University of Science and Technology
Course Applied Computer Technology
Keywords streaming media TFRC lost event rate buffer
Type Master's thesis
Year 2011
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With the rapid development of streaming media technology and wireless transmission, Wireless streaming media transmission becomes one of the hot network applications. When the multimedia data brings rich and colorful services, it also brings challenges. In order to achieve real-time and reliability of multimedia data transmission in wireless network. A new and effective transmission control mechanism needed.On the one hand, the internet doesn’t provide service and quality assurance to real-time streaming media transmission, because it has requirement for QoS, lower delay jitter, largest permissible delay, throughput, etc. On the other hand, with wireless network has higher characteristics unstable link. TCP congestion control mechanism can’t adapt to wireless data transmission. TCP-Friendly congestion control mechanism (TFRC) has good properties in network, but it cannot effectively distinguish wireless link lost and congestion lost, so that the performance declined in wireless network.The paper gives two solutions. one is the improved lost event rate calculation method. There are two kinds of lost package in wireless network, link error lost and congestion lost. The link error is little impact to rate. So we give the calculating formula of event lost ration, after distinguish the type of lost using network parameters. The other is the buffer joining in the receiver, in order to deal with the real-time streaming media transmission to delay jitter’s sensitivity and the biggest delay licensing.The last, through the simulation, we conclude the improved scheme is effective.

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