Title :
Cross-Layer Optimization for Video Communication Over AWGN Channel
Author :
An, Cheolhong ; Nguyen, Truong Q.
Author_Institution :
UCSD, La Jolla
Abstract :
In this paper, cross-layer optimization approach is applied from video coding to the physical layer through media access control (MAC) layer. We mainly focus on resource allocation of source code rate and channel code rate with optimal MAC frame length. Therefore, elaborate mathematical models are derived to represent end-to-end distortion of video streams and 802.1 la-like MAC and PHY with automatic repeat request (ARQ) and rate compatible punctured convolutional code (RCPC) over additive white Gaussian noise (AWGN) channel. These models are formulated as a convex optimization problem, and it is solved by the dual decomposition method. From a numerical example, significant reduction of overall distortion can be achieved.
Keywords :
AWGN channels; access protocols; automatic repeat request; combined source-channel coding; convolutional codes; video coding; video communication; video streaming; wireless LAN; 802.11a-like MAC; ARQ; AWGN channel; additive white Gaussian noise channel; automatic repeat request; channel code rate; convex optimization problem; cross-layer optimization; dual decomposition method; end-to-end distortion; media access control; optimal MAC frame length; rate compatible punctured convolutional code; resource allocation; source code; source code rate; video coding; video communication; video streams; AWGN channels; Additive white noise; Automatic repeat request; Convolutional codes; Mathematical model; Media Access Protocol; Physical layer; Resource management; Streaming media; Video coding;
Conference_Titel :
Global Telecommunications Conference, 2007. GLOBECOM '07. IEEE
Conference_Location :
Washington, DC
Print_ISBN :
978-1-4244-1042-2
Electronic_ISBN :
978-1-4244-1043-9
DOI :
10.1109/GLOCOM.2007.635
