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Abstract
Cooperative transmission has been proposed as a novel transmission strategy that takes advantage of broadcast nature of wireless networks, forms virtual MIMO system, and provides diversity gains. In this paper, wireless video transmission protocols are proposed, in which the spectrum resources are first allocated for the source side to broadcast video packets to the relay and destination, and then for the relay side to transmit side information generated from the received packets. The proposed protocols are optimized to minimize the end-to-end expected distortion via choosing bandwidth/power allocation, configuration of side information, subject to bandwidth and power constraints. For multiuser cases, most of current resource allocation approaches cannot be naturally extended and applied to the networks with relay nodes for video transmission. This paper extends the share auction approach into the cooperative video communication scenarios and provides a near-optimal solution for resource allocation. Experimental results have demonstrated that the proposed approach has significant advantage of up to 4 dB gain in single user case and 1.3 dB gain in multiuser case over the reference systems in terms of peak-to-signal-noise ratio. In addition, it reduces the formidable computational complexity of the optimal solution to linear complexity with performance degradation of less than 0.3 dB.
Highlights
Over the past few decades, wireless communications and networking have experienced unprecedented growth
We propose a wireless video transmission protocol that leverages the benefits of both cooperative transmission and the idea of Distributed Source Coding (DSC)
We propose a quasishare auction-based approach, which explores the concept of share auction into this new domain. (In general the share auction concept cannot be naturally extended to video communications, due to the complexity to express the cooperative video end-to-end distortion and to obtain the close form update function.) Experimental results have demonstrated that the proposed approach has significant advantage of up to 1.3 dB gain over the reference system
Summary
Over the past few decades, wireless communications and networking have experienced unprecedented growth. (In general the share auction concept cannot be naturally extended to video communications, due to the complexity to express the cooperative video end-to-end distortion and to obtain the close form update function.) Experimental results have demonstrated that the proposed approach has significant advantage of up to 1.3 dB gain over the reference system. It reduces the formidable computational complexity of the optimal solution to linear complexity with performance degradation of less than 0.3 dB.
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