QoS aware schedulers for multi-users on OFDMA downlink: Optimal and heuristic. - Matheus C. Nogueira; Marcelo Caggiani Luizelli; Samuel Marini; Cristiano C. Both; Juergen Rochol; Armando Ordóñez 001; Oscar Maurício Caicedo Rendón (LATINCOM, 2016)