Performance of video quality in dual-branch diversity based SR-ARQ over Rayleigh fading channel
Proceedings of the 7th International Conference on Advances in Mobile Computing and Multimedia
Fast local mobility management with multiple tunnel support in heterogeneous wireless networks
Proceedings of the 8th ACM international workshop on Mobility management and wireless access
Proceedings of the 5th International Conference on Ubiquitous Information Management and Communication
QoS analysis of video streaming service in live cellular networks
Computer Communications
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Universal Mobile Telecommunications System (UMTS) is athird-generation mobile communication system that supportswireless wideband multimedia communications. This paperinvestigates the performance of streaming MPEG-4 videoover UMTS dedicated channels with varying channel conditions.In order to evaluate the performance, simulation models for UMTSand MPEG-4 were developed. Simulation results show that UMTSRadio Control Link (RLC) protocol operating in the acknowledgedmode outperforms the unacknowledged mode. The latter modeprovides timely delivery but no error recovery. The acknowledgedmode can deliver acceptable video quality for RLC block error ratesup to 40% utilizing a pre-decoder buffer. We also discover thatRLC block size can affect the video quality with a larger RLC block size attaining better quality. However, the optimum RLC blocksize is dependent on the encoded video frame size and the channelbit rate. Therefore, the RLC block size can be tuned to a proper value given the encoded video frame size and channel bit rate.