An Optimal Joint User Association and Power Allocation Algorithm for Secrecy Information Transmission in Heterogeneous Networks

Algorithm 1

Iterative algorithm based secrecy energy efficiency maximization.

(1)  Set the maximum number of iterations and the maximum tolerance

(2)  Set and the iterative index

(3)  repeat

(4)  For a given , solve power allocation subproblem to obtain the locally optimal power allocation strategy

(5)  if  

       then

(7)      Convergence = true

(8)     return  

(9)    else

(10)        

(11)   end if

(12)       until Convergence = true or