  Integrated access and backhaul (IAB) networks have the potential to provide
high data rate in both access and backhaul networks by sharing the same
spectrum. Due to the dense deployment of small base stations (SBSs), IAB
networks connect SBSs to the core network in a wireless manner without the
deployment of high-cost optical fiber. As large spectrum is available in mmWave
bands and high data rate is achieved by using directional beamforming, the
access and backhaul links can be integrated in the same frequency band while
satisfying quality-of-service constraints. In this work, we optimize the
scheduling of access and backhaul links such that the minimum throughput of the
access links is maximized based on the revised simplex method. By considering a
probability based line-ofsight (LOS) and non-line-of-sight (NLOS) path loss
model and the antenna array gains, we compare the achievable minimum access
throughput of the IAB network with the network with only macro base stations,
and study the effect of the network topology and antenna parameters on the
achievable minimum throughput. Simulation results show that, for a broad range
of parameter settings, the implementation of IABs improves the access minimum
achievable throughput.
