Browsing by Author "Lin, Hsuan-Li"

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Cross Layer Adaptation with QoS Guarantees for Wireless Scalable Video Streaming
(2012-09-01)
Lin, Hsuan-Li
;
Wu, Tung-Yu
;
Huang, Ching-Yao
;
電機工程學系
;
Department of Electrical and Computer Engineering
In this paper, a cross-layer adaptation scheme is proposed for quality of service (QoS) provision in the scalable video streaming of high definition (HD) content. The cross-layer parameters, which contain the video rate, payload length of a packet, the mode of modulation and coding scheme (MCS), can be dynamically adapted to minimize distortion of a video streaming under the given delay bound. Based on the channel quality and rate-distortion parameters, the proposed scheme formulates the problem of parameter selection into an optimization problem. Simulation results show that our approach guarantees video quality under QoS constraints.
Payload Length Adaptation for Wireless Video Transmission in Multicarrier Systems
(2011)
Lin, Hsuan-Li
;
Wu, Tung-Yu
;
Huang, Ching-Yao
;
電機工程學系
;
Department of Electrical and Computer Engineering
We present an optimization architecture for a cross-layer design in wireless video transmission and investigate the multicarrier effect on wireless communication. To transmit video frames with delay bound and target frame error rate (FER) constraint, we formulate an optimization problem to minimize the required resource units for a single user by adjusting payload length, M-ary modulation, block size, and code rate. Instead of exhaustive approach, we propose a minimal required resource units (MRRU) algorithm with feedback of mean mutual information per bit (MMIB) to resolve this problem by binomial distribution function approximation. Finally, the performance comparison between MRRU algorithm and maximum throughput approach is given, and the effect on multicarrier system in a correlated Rayleigh fading channel is shown.