Table 3 Location-based algorithm

1.

Initialization: Randomly distribute CUEs and D2D pairs in a cell and calculate their distances to the center of the BS. Determine the value of r ₀ between 0 and the radius of the cell

2.

Divide users into four groups according to r ₀, A_CUE, A_D2D, B_CUE, and B_D2D

3.

In area A or B, users randomly constitute clusters (the clustering in area B must satisfy the distance criterion), and each cluster consists of two CUE users and two D2D pairs

4.

For each RB

5.

       Randomly choose a cluster in the cell and determine whether it is in area A or B

6.

       Calculate the large-scale loss in this cluster

7.

              Case user to BS: 128.1 + 37.6 * log ₁₀(d[km])

8.

              Case user to user: 148 + 40 * log ₁₀(d[km])

9.

       Set the initial transmit power according to area A or B: P _C1, P _C2, P _D1, P _D2

10.

       Do

11.

            For each subcarrier (SC)

12.

                  Generate small-scale loss H: multiplex Gaussian with zero mean unit variance

13.

                  If cluster in area A

14.

                      Interference Alignment - Equations (20)-(26), (42)-(47)

15.

                  Else cluster in area B

16.

                      Multiplex Scheme - Equations (1)-(16)

17.

                  End if

18.

       End SC

19.

       Calculate SINR in this RB: Equations (27) to (30) for IA

20.

                                                           Equations (17) and (18)for Multiplex;

21.

       While SINR does not meet the target, Power Control, then jump 10

22.

End each RB

23.

Calculate sum throughput