Power allocation for in-band full-duplex self-backhauling

Abstract

Ultra-dense cellular networks are emerging as one key characteristic of 5G wireless networks. In this context, frequency reuse is a fundamental technology enabler for efficient utilization of limited spectrum resources. In this paper, we investigate the in-band Full-Duplex (FD) self-backhauling architecture, in which Base Stations (BSs) operate on the same spectrum used by the users to access the network for backhauling purposes. In such a scenario, both cross-tier interference and self-interference due to the FD scheme at the BS should be taken into consideration. Apart from the frequency reuse, the network densification comes with the challenge of proper backhaul provisioning. In this paper, we propose a power allocation strategy for both the backhaul and access network such that the sum-rate is maximized and specifically tailored to tackle backhaul congestion.