Algorithm 2 Cache-aware User Association and Resources Allocation Algorithm

Initialize$\left\{\lambda ,\beta \right\}$; repeat      Obtain the $\left\{d_m^{k*}\right\}$ based on Equation (14);      Update $\left\{\lambda ,\beta \right\}$ based on ellipsoid method or subgradient method;      $T=T+1$; until Convergence or $T\ge T_{max}$; Obtain $\left\{a_m^{k*}\right\}$ and $\left\{b_m^{k*}\right\}$ based on Equations (16) and (17), respectively.