Algorithm 1: Multi-User Time-Power Resource Allocation Algorithm

1. Initialization: $P_{PU1}$, $\gamma$, ${\lambda }_i{}^{(k)}(i=1,2,3)$, ${\Omega }_{\alpha }$, convergence tolerance$\Delta$; 2. while $\left|{\lambda }_i{}^{(k)}-{\lambda }_i{}^{(k-1)}\right|>\Delta (i=1,2,3)$ 3.    calculated ${\gamma }^{*}$, $P_{PU1}$ according to Equations (22) and (27); 4.    if $P_{PU1}>0$ and $P_{PU1}<P_{T\max }$ 5.     update ${\stackrel{⌢}{P}}_{PU1}$ 6.    end if 7.    calculated $\tau$ according to Equation (17); 8.    iteratively update ${\lambda }_i{}^{(k+1)}(i=1,2,3)$ according to Equation (29); 9. end while 10. obtained ${\Omega }_{\alpha }$ according to P5; 11. for $\alpha \in {\Omega }_{\alpha }$ 12.  calculated $\tau$ according to Equation (17); 13. end for