Date Added: Mar 2012
In this paper, the authors propose a system for wireless video transmission with a wireless PHYsical layer (PHY) that supports cooperative forwarding of interfered/superimposed packets. Their system model considers multiple and independent unicast transmissions between network nodes while a number of them serve as relays of the interfered/superimposed signals. For this new PHY the average transmission rate that each node can achieve is estimated first. Next, they formulate a utility optimization framework for the video transmission problem and they show that it can be simplified due to the features of the new PHY. Simulation results reveal the system operating regions for which superimposing wireless packets is a better choice than a typical cooperative PHY.