Method for exchanging messages between objects in coexistence management system

The present invention relates to a method for exchanging messages required for engagement between objects in a coexistence management system for managing a plurality of frequency-sharing devices. More specifically, the method for exchanging messages in the coexistence management system comprising a coexistence enabler (CE), a coexistence manager (CM), and a coexistence discovery and information server (CDIS) comprises the steps of: the CM generating a reconfiguration request message and transmitting same to the CE; and waiting for a reconfiguration response message from the CE, wherein the reconfiguration request message may comprise at least one of an operating channel list of a WSO serviced by the CE, a transmitting power limit numeral, a channel sharing indication flag, a sending schedule, and channel category information.