  In this paper, we present a quality of service (QoS)-aware priority-based
spectrum management scheme to guarantee the minimum required bit rate of
vertical sector players (VSPs) in the 5G and beyond generation, including the
6th generation (6G). VSPs are considered as spectrum leasers to optimize the
overall spectrum efficiency of the network from the perspective of the mobile
network operator (MNO) as the spectrum licensee and auctioneer. We exploit a
modified Vickrey-Clarke-Groves (VCG) auction mechanism to allocate the spectrum
to them where the QoS and the truthfulness of bidders are considered as two
important parameters for prioritization of VSPs. The simulation is done with
the help of deep deterministic policy gradient (DDPG) as a deep reinforcement
learning (DRL)-based algorithm. Simulation results demonstrate that deploying
the DDPG algorithm results in significant advantages. In particular, the
efficiency of the proposed spectrum management scheme is about %85 compared to
the %35 efficiency in traditional auction methods.
