Distortion-Aware Concurrent Multipath Transfer for Mobile Video Streaming in Heterogeneous Wireless Networks - 2015
The large proliferation of wireless infrastructures with complementary characteristics prompts the bandwidth aggregation for Concurrent Multipath Transfer (CMT) over heterogeneous access networks. Stream Management Transmission Protocol (SCTP) is the quality transport-layer resolution to enable CMT in multihomed communication environments. But, delivering high-quality streaming video with the existing CMT solutions still remains problematic due to the stringent quality of service (QoS) necessities and path asymmetry in heterogeneous wireless networks. In this paper, we tend to advance the cutting-edge by introducing video distortion into the choice method of multipath data transfer. The proposed distortion-aware concurrent multipath transfer (CMT-DA) solution includes three phases: one) per-path standing estimation and congestion control; 2) quality-optimal video flow rate allocation; 3) delay and loss controlled information retransmission. The term `flow rate allocation' indicates dynamically choosing applicable access networks and assigning the transmission rates. We tend to analytically formulate the information distribution over multiple communication ways to attenuate the top-to-finish video distortion and derive the solution primarily based on the utility maximization theory. The performance of the proposed CMT-DA is evaluated through intensive semi-physical emulations in Exata involving H.264 video streaming. Experimental results show that CMT-DA outperforms the reference schemes in terms of video peak signal-to-noise ratio (PSNR), goodput, and inter-packet delay.
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