||This presentation proposes a new finite-source retrial queueing model to
consider spectrum renting in mobile cellular networks, in which service
providers may rent each other’s unutilized frequency bands.
We present a novel way to take into account the renting fee, which can
be used to fine-tune the operation of the spectrum renting procedure.
Numerical results show that, at high loads, it is still desirable to
initiate a spectrum renting request, even if no discount is offered by
the frequency bands' owners.