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Wireless Body Area Network (WBAN) concept is one of the most promising technologies for healthcare applications. In WBANs, sensor nodes are capable of sensing, gathering the human body signs and sending them to the HUB; the communication between nodes and HUB is called as intra-WBAN communications. Inter-WBAN communication manages all HUBs for communications of various WBANs. WBANs have inherently heterogeneous structures and limited energy sources, and also, installation/configuration network management processes are increasingly quite complex. New approaches are required to implement WBANs in order to overcome these challenges. We propose the Software Defined Networking (SDN) approach aims at constructing a flexible and manageable structure for inter-WBAN communications. Therefore, a new SDN-enabled WBAN architecture with HUBsFlow interface protocol is …