Efficient 3D Positioning of UAVs and User Association Based on Hybrid PSO-K-Means Clustering Algorithm in Future Wireless Networks

Algorithm 2

Users association with UAVs.

	Input:
	Output:
	Initialize:  =
(1)	Step 1
(2)	for 1 to do
(3)	Create a list of UAVs that satisfy constraint
(4)	end for
(5)	Step 2
(6)	for 1 to do
(7)	ifthen
(8)	choose users having maximum data rate (i.e., max. )
(9)	end
(10)	else ifthen
(11)	choose users having minimum data rate (i.e., min. )
(12)	end
(13)	Counters Initialize:  = 0, for all j
(14)	while do
(15)	if and
(16)	Update  = 1, , , and
(17)	end if
(18)	end while
(19)	end for