Wireless multicast for cloud radio access network with heterogeneous backhaul

Cooperative communication in which multiple base-stations (BSs) jointly transmit to mobile users is a major advantage of the cloud radio-access network (C-RAN) architecture. This paper considers the use of wireless multicast for sharing user messages at multiple BSs in the C-RAN backhaul for cooperation purpose. To combat fading and path-loss in the wireless channels to the different BSs, this paper proposes the optimal provisioning of secondary backhaul to smooth out the channel disparity. The paper analyzes the problem structure and proposes an efficient algorithm for the optimization of secondary backhaul rate provisioning.