Transmit power aware cross-layer optimization for LTE uplink video streaming

Abstract

The rapid developments of advanced wireless communication technologies and mobile devices are boosting the uplink multimedia applications. In this paper, a transmit power aware cross-layer optimization scheme is proposed to achieve a good trade-off between the transmit power and the perceived video quality for Long Term Evolution uplink video streaming. Specifically, the video coding quantization parameter and encoding mode at the application layer, and the uplink transmit power as well as modulation and coding scheme at the physical layer are jointly adjusted in the cross-layer optimization. To further improve the perceptual video experience for the end user with limited transmission resources, unequal quality control is performed by enhancing the video quality of region of interest. Additionally, the structural similarity is adopted as the video quality measurement metric to make the optimized video properly preserve the structural information during the cross-layer optimization process. Experimental results show that significant performance improvements in terms of the transmit power reduction and the perceptual video quality are achieved for the proposed transmit power aware cross-layer optimization scheme.