System and method for managing resources in a communication system

The present invention relates to a system and method for managing resources, which involve managing a plurality of frequency resources in a communication system including a plurality of systems having no right to use a first frequency band. The system comprises a coexistence manager (CM) which manages, when a frequency band usable by the plurality of systems is found in the first frequency band, the plurality of systems so as to enable the coexistence of the systems and frequency-sharing among the systems in the usable frequency band; a coexistence enabler (CE) which transceives information of the plurality of systems and information of the coexistence manager; and a coexistence discovery and information server which supports the control of the coexistence manager on the plurality of systems. The plurality of systems uses the usable frequency band by means of coexistence and frequency-sharing according to a reference model.