Self-backhauling full-duplex access node with massive antenna arrays: Power allocation and achievable sum-rate

Abstract

This paper analyzes a self-backhauling inband full-duplex access node that has massive antenna arrays for transmission and reception. In particular, the optimal transmit powers for such a system are solved in a closed form, taking into account the self-interference as well as backhaul capacity requirements and incorporating the role of downlink-uplink traffic ratio in sum-rate maximization. Numerical results are also provided, where the obtained analytical expressions are evaluated with realistic system parameter values. All in all, the presented theory and the numerical results provide insights into the proposed system, indicating that a self-backhauling access node could greatly benefit from being capable of inband full-duplex communication.