This item establishes a system for an in-band network, from which both wireless power transfer and data transmission are carried out simultaneously at a same frequency band. It provides technical solution for a remote and consistent power supply along with a stable network. For the purpose of this item, the system is designed based on the principles described in ISO/IEC 15149 (Magnetic Field Area Network) In this way, it is expected to achieve superiority in control of devices, while managing wireless power transfer to multiple devices in request. The focus is on the physical and media access control layer protocol; it will not discuss matters on the upper layer protocols. As together, the PHY and MAC layers should be able to carry out the following tasks: data transmission, signal control, wireless power transfer.