A main hub, an auxiliary hub, a sensor node and a communication method for communicating in a wireless body area network (WBAN) including at least one auxiliary hub. In particular, at least one auxiliary hub including a control function for the wireless body area network is used to improve the communication reliability to the WBAN system by continuously providing operation to the WBAN system in the absence of the main hub, a main hub that communicates in a wireless body area network (WBAN) that includes at least one auxiliary hub capable of reducing information loss and communication performance degradation by enabling continuous communication with a sensor node that can not be secured A hub, a sensor node, and a communication method thereof.
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