Power Efficiency of the Hybrid Broadcast Unicast Network with Suitable Resource Allocation

International audienceThe demand on linear services like mobile TV has been growing during the last few years, creating challenges to the conventional methods of delivery such as broadcast networks and broadband mobile networks. In this paper, a hybrid approach with the coexistence of a broadcast transmitter and a unicast broadband transmitter is discussed, and the problem of the power consumption and power efficiency is interpreted. To achieve an efficient hybrid network in terms of power consumed to serve a user, the hybrid network is numerically optimized in terms of key design parameters like the broadcast radius and the base stations' density. The effect of user density is also studied highlighting the gain expected when using the hybrid approach. Results have shown that an optimal operation point could be found, and that the gain provided by the hybrid network depends on the density of the users