  Licensed Shared Access (LSA) is a spectrum sharing mechanism where bandwidth
is shared between a primary network, called incumbent, and a secondary mobile
network. In this work, we address dynamic spectrum management mechanisms for
LSA systems. We propose a fair spectrum management algorithm for distributing
incumbent's available spectrum among mobile networks. Then, we adapt the
proposed algorithm to take mobile network operator's regulatory compliance
aspect into account and penalize the misbehaving network operators in spectrum
allocation. We extend our results to the scenario where more than one incumbent
offer spectrum to the mobile operators in a service area and propose various
protocols, which ensure long term fair spectrum allocation within the
individual LSA networks. Finally, we numerically evaluate the performance of
the proposed spectrum allocation algorithms and compare them using various
performance metrics. For the single incumbent case, the numerical results show
that the spectrum allocation is fair when the mobile operators follow the
spectrum access regulations. We demonstrate the effect of our proposed penalty
functions on spectrum allocation when the operators do not comply with the
regulatory aspects. For the multi-incumbent scenario, the results show a
trade-off between efficient spectrum allocation and flexibility in spectrum
access for our proposed algorithms.
