GravCPA: Controller Placement Algorithm Based on Traffic Gravitation in SDN

Algorithm 2

Controller Placement Algorithm (gravCPA).

	Input:
	Output: dictionary structure:
	Initialize:
	Process
1	for in do
2
3  while and change do
4
5
6
7
8  end while
9   find the closest node to
10
11  for in \{ for in if \} do
12    if calOptFunc  < calOptFunc
13  end for
14
15 end for
16 return
	Function 2 calOptFunc   int:
17 calculate the value of equation (7)
18 return