Algorithm 2: User Selection Algorithm GetS($B^U$,$B^D$,B)

1:Input:${\mathcal{N}}_1,{\mathcal{N}}_2$ 2:for$n\in {\mathcal{N}}_1$do 3:  if $t_{dn,C}+t_{n,C}^U+t_n^{\mathrm{P}}+t_{d,C}\le T_{round,}$ and $E_{n,C}^{\mathrm{M}}+E_n^{\mathrm{P}}\le {\gamma }_{nE}$ then 4:    ${\mathcal{S}}_1\leftarrow n$ 5:  end if 6:end for 7:for$n\in {\mathcal{N}}_2$do 8:  if $t_{n,C}^D+t_{n,C}^U+t_n^{\mathrm{P}}\le T_{round,}$ and $E_{n,C}^{\mathrm{M}}+E_n^{\mathrm{P}}\le {\gamma }_{nE}$ then 9:   ${\mathcal{S}}_2\leftarrow n$ 10:  end if 11:end for