Optimization of Cognitive Radio Secondary Information Gathering Station Positioning and Operating Channel Selection for IoT Sensor Networks

Algorithm 1

: The proposed PSO-based resource allocation algorithm.

(1)	/ initialization/
(2)	Generate topology of primary systems;
(3)	Generate SIDs appearance probability matrix randomly;
(4)	Set the values of , , , , , , and ;
(5)	Determine the PSO parameters: , iteration number;
(6)	Set ;
(7)	Generate particle (SIGSs positions and channels) positions and velocities using Equations (13) and (14);
(8)	Obtain the SIGS position and matched channel;
(9)	Set ;
(10)	/ calculate every particles utility function/
(11)	while (iteration ≤ predetermined maximum iteration number)
(12)	{
(13)	for population size, to
(14)	{
(15)	for SIGS, to
(16)	{
(17)	Calculate the and based on particle positions;
(18)	Check the constraint using Equations (11) and (12);
(19)	if ()
(20)	{
(21)	Calculate the and using Equations (6) and (7);
(22)	Calculate Equations (8) and (9);
(23)	Obtain the value based Equation (10);
(24)	}
(25)	else
(26)	}
(27)	}
(28)	/ evaluate every particles and /
(29)	if ()
(30)	{
(31)	;
(32)	}
(33)	if ()
(34)	{
(35)	;
(36)	}
(37)	Update position and velocity of () based on Equations (13) and (14);
(38)	Check position constraint;
(39)	iterations ++
(40)	}