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In future wireless networks, cooperating users may create virtual antenna arrays to profit from user cooperation diversity. Even then, fading can severely reduce the quality of real-time media streams. To improve streaming quality in cooperative networks, we propose, firstly, the asymmetric allocation of diversity branches. Secondly, we employ this method in our traffic-aware asymmetric cooperation diversity (TACD) scheme to prioritize important parts of the media streams. We demonstrate by outage analysis and simulation that this approach significantly increases the quality of real-time media streams without introducing additional delays.