A CLIENT-DRIVEN SCALABLE CROSS-LAYER RETRANSMISSION SCHEME FOR 3G VIDEO STREAMING (FriAmPO1)

Author(s) : Liu Hao (Shanghai Jiao Tong University, China) Zhang Wenjun (Shanghai Jiao Tong University, China) Cai Jun (University of Calgary, Canada) Yu Songyu (Shanghai Jiao Tong University, China)

Abstract : The wireless channel is highly time-varying where packet losses often occur during the fading or lossy handovers. In order to avoid unaccepted quality degradation of video streaming over 3G cellular networks, we propose and analyze a novel client-driven scalable cross-layer (CSC) retransmission scheme. Considering the perceptual importance of different video partitions under the real-time and bandwidth constraints, the proposed scheme uses the radio link-layer retransmission with priority to adapt conventional packet losses in wireless channels; furthermore, it uses the adaptive transport-layer retransmission to provide end-to-end quality-of-service (QoS) guarantees over cellular networks. The simulation experiments show that the proposed scheme can effectively improve the perceptual quality of 3G video streaming as compared to the traditional deadline-based scheme without the prioritized link-layer retransmission.

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