Optimization Algorithm for SVC Multicast with Light-Weight Feedback
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概要
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Scalable video coding with different modulation and coding schemes (MCSs) applied to different video layers is very appropriate for wireless multicast services because it can provide different video quality to different users according to their channel conditions, and a promising solution to handle packet losses induced by fading wireless channels is the use of layered hybrid FEC/ARQ scheme according to light-weight feedback messages from users about how many packets they have received. It is important to choose an appropriate MCS for each layer, decide how many parity packets in one layer should be transmitted, and determine the resources allocated to multiple video sessions to apply scalable video coding to wireless multicast streaming. We prove that such resource allocation problem is NP-hard and propose an approximate optimal algorithm with a polynomial run time. The algorithm can get the optimal transmission configuration to maximize the expected utility for all users where the utility can be a generic non-negative, non-decreasing function of the received rate. The results from simulations revealed that our algorithm offer significant improvements to video quality over a nave algorithm, an optimal algorithm without feedback from users, and an algorithm with feedback from designated users, especially in scenarios with multiple video sessions and limited radio resources.
著者
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Ji Yusheng
National Center For Science Information Systems
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Gu Yu
National Institute Of Informatics
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ZHOU Hao
School of Computer Science and Technology, University of Science and Technology of China
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ZHOU Hao
School of Computer Science, University of Science and Technology of China and State Key Laboratory of Networking and Switching Technology of Beijing and Province Key Laboratory of Software in Computing and Communication
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ZHAO Baohua
School of Computer Science and Technology, University of Science and Technology of China
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ZHAO Baohua
School of Computer Science, University of Science and Technology of China and State Key Laboratory of Networking and Switching Technology of Beijing and Province Key Laboratory of Software in Computing and Communication
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