Energy Efficiency for Data Offloading in D2D Cooperative Caching Networks

Algorithm 1

The optimal caching policy algorithm.

1: Initializet:=1, Lagrangian variable , step size , error factor ; Calculate initial cache policy based on (14) and (15)

2: whiledo

3:  ifthen

4:  

5:  else

6:  

7:  end if

8:  Updating cache policy based on (14) and (15)

9:  ifthen

10:  

11: end if

12: Updating cache policy

13: Set

14: end while

15: The final is obtained.