A multi-solution based radio system is provided. A radio system adaptively selects a solution to be used in a communication method based on a quality of service (QoS). The radio system estimates a QoS, such as by using information about at least one of a channel state, a signal state, a performance using a current solution, a complexity using a current solution, and a power consumption of a terminal with respect to a current solution. When the estimated QoS does not satisfy a predetermined condition, the radio system changes a current solution to an alternative solution or changes a parameter value applied to the current solution using feedback information.