Bandwidth and power joint control method based on downlink non-orthogonal multiple access system

The invention discloses a bandwidth and power joint control method based on a downlink non-orthogonal multiple access system. The method comprises the steps that (1) a base station sends data through a non-orthogonal multiple access technology and provides data traffic service for mobile users; (2), system characteristics are analyzed to carry out equivalent conversion on a problem; (3), it is proved that the converted problem is a feasibility detection problem, so efficient solution can be carried out; and (4), feasible and efficient algorithm solution is designed according to finally converted problem characteristics, and an algorithm output result is substituted back to a top layer problem and an optimum bandwidth and power distribution value is solved. According to the feasible and efficient optimization method provided by the invention, data demands of the mobile users are ensured, and the system total resource consumption is minimized, a system resource utilization rate is improved, and the system resou