The present invention relates to a MAC protocol in a wireless body area network capable of processing emergency data and a wireless network communication method using the same. More specifically, the present invention replaces a Contention Free Period (CFP) of a WBAN MAC protocol with a Mixed Period (MP) for processing the emergency data, and sets an inactive period as an Extended Period (EP) for additional allocation due to the emergency data processing and re-allocation of a pre-guarantee Guaranteed Time Slot (GTS). As described above, the present invention can efficiently process the emergency data and enables emergency data processing which can guarantee low delay and high reliability of the emergency data.
