Uplink multi radio access method and system in hetergeneous networks

The embodiment of the present invention relates to an efficient uplink multiple access method and an apparatus in a multiple radio access system. The uplink multiple access method in the multiple radio access system includes the steps of: measuring the channel states of the component carriers; determining the transmission power and assigned frequency of the component carrier to transmit data among the component carriers through Lagrangian and Newton methods; deriving an optimum solution through the Lagrangian and Newton methods; and connecting a preset number of component carriers to simultaneously access the uplink.