  Full-duplex is a promising technology and great system performance
enhancement can be achieved especially when we apply it to base stations. In
this paper, we consider a Multi-User OFDMA network consisting of one
Full-duplex base station, several uplink users, and a number of downlink users.
A joint subcarrier, downlink user and uplink user mapping and power allocation
optimization problem is investigated. In detail, we first decompose the
3-dimensional mapping problem into three 2-dimensional sub-problems and solve
them by iteratively using classical Hungarian Method. Then, based on the dual
method, we sequentially solve the power allocation and 3-dimensional mapping
problem at each dual point. And the optimal solution to the dual problem is
derived by using sub-gradient method. Unlike existing methods that only solve
one sub-problem but with a high computation complexity, we tackle both of them
and successfully reducing computation complexity from exponential to polynomial
order. Numerical simulations are conducted to verify the proposed system.
