Summary:
Improving the performance of D2D-enabled
cellular systems with QoS/power constraints usually requires
advanced techniques such as stochastic optimization, non-
linear programming, and integer optimization. As expected
, the solution of these approaches and their derived sub-optimal
heuristic can indeed improve the system performance with
QoS/power constraints. However, they do not seem to be
good candidate for time-stringent application with limited
computational capacity. Nonetheless, the authors of [65] and
[66] derived the closed-form of the optimal solution, that in
fact reduces the computational complexity. It should be noted that
their considered scenario only consist of a cellular user
and a D2D pair which is not practical in reality.