  In this paper, we develop a resource allocation framework to optimize the
downlink transmission of a backhaul-aware multi-cell cognitive radio network
(CRN) which is enabled with multi-carrier non-orthogonal multiple access
(MC-NOMA). The considered CRN is composed of a single macro base station (MBS)
and multiple small BSs (SBSs) that are referred to as the primary and secondary
tiers, respectively. For the primary tier, we consider orthogonal frequency
division multiple access (OFDMA) scheme and also Quality of Service (QoS) to
evaluate the user satisfaction. On the other hand in secondary tier, MC-NOMA is
employed and the user satisfaction for web, video and audio as popular
multimedia services is evaluated by Quality-of-Experience (QoE). Furthermore,
each user in secondary tier can be served simultaneously by multiple SBSs over
a subcarrier via Joint Transmission (JT). In particular, we formulate a joint
optimization problem of power control and scheduling (i.e., user association
and subcarrier allocation) in secondary tier to maximize total achievable QoE
for the secondary users. An efficient resource allocation mechanism has been
developed to handle the non-linear form interference and to overcome the
non-convexity of QoE serving functions. The scheduling and power control policy
leverage on Augmented Lagrangian Method (ALM). Simulation results reveal that
proposed solution approach can control the interference and JT-NOMA improves
total perceived QoE compared to the existing schemes.
