Convergence of Communication and Broadcast Networks in Physical Layer

Convergence of cellular networks and broadcast networks is a long-term research task, because various digital mobile and digital broadcast radio technologies have been developed and specifically been optimized respectively. This paper describes the physical layer convergence of communications and broadcast networks. First, a physical layer downlink frame structure, which contains broadcast sub frame and communication sub frame, is proposed in order to process communication and broadcast services data simultaneously. Then a combined mode of broadcast networks with a big base station and communication networks with many small base stations is presented, and a downlink frame transmission method is proposed. Finally, we simulate the proposed physical layer downlink convergence framework. The simulation results show that the proposed system has close performance with IEEE 802.16e-PUSC system in terms of peak-to-average power ratio, bit error rate and mean square error.