An Enhanced OFDM Resource Allocation Algorithm in C-RAN Based 5G Public Safety Network

Algorithm 2

Generalized bender’s decomposition and FP-based RB allocation algorithm to solve problem (23).

) Relax problem (19) into problem (20)

() Initialization: , , , where is big enough.

() Repeat:

() By Algorithm 1, decompose the problem (20) into master problem (25) and slave problem (24).

() Work out (25) to obtain optimal solution , and compute the upper bound

() Let , by FP standard expressed by (31) to find the feasible integer solution , and then

() Work out (24) to obtain , and compute the lower bound

()

() Until

() Return as the approximate optimum solution to problem (19), and compute the value

   of the objective function by (24).