Energy Efficiency Maximization for Multi-Cell Multi-Carrier NOMA Networks

. 2020 Nov 20;20(22):6642. doi: 10.3390/s20226642

Algorithm 1 User association matching scheme.

1:
Initialize the power for all users using (14)
2:
Initialize the associated users $A U$ , unassociated users $U U = {[|h_{m, i}|]}_{M \times N}$ , and $U B$ lists to record the associated users with the BSs, the unassociated users, and the preferable BS, respectively.
3:
while $U U \neq ϕ$ do
4:
for $i = 1 : N$ do
5:
if $i \in U U$ then
6:
Find the maximum value $|h_{m, i}|$ in $U U$ according to:
$|h_{m, i}| = arg max U U_{M \times N}$ (15)
7:
Assign the user to the BS m from the list $U B$ , and remove him/her from $U U$ .
8:
if all BSs have more than one user, calculate the EE $E E (π_{m}), m = 1, \dots, M$ for all possible $π_{m} = \{A U (m), \{i\}\}$ sets. then
9:
Select the set that has maximal EE:
$π = \underset{π_{m}}{arg max} E E (π_{m})$ (16)
10:
Update $A U$ by adding the new set $π$ . Update $U U$ by removing the elements of the set $π$ .
11:
Update $U B$ by removing the preference m of the unmatched user.
12:
end if
13:
end if
14:
end for
15:
end while