A communication apparatus using a super frame to construct a dynamic protocol and a message exchanging method of a sensor node and a hub device to construct a dynamic protocol

PURPOSE: A message exchange method of a hub device and a sensor node is provided to synchronize the protocol of the sensor nodes with the hub device including different protocols. CONSTITUTION: A super frame (100) comprises a beacon period (110), an access period (130), and a multiple access control (MAC) period (150). The beacon period transmits a beacon message including information related to a MAC protocol used in the MAC period corresponding to each sensor node or information related to an access period protocol used in the access period to the sensor node. The access period allows the sensor node to access a hub device according to the access period protocol. The MAC period transmits or receives data according to each sensor node or the MAC protocol corresponding to each sensor node.