The communication system using near-field coupling and method of the same

The present invention relates to a communication system and method using a Chapter Near Field, more particularly biological medium having a conductivity that is, the predetermined data signals over the field Near Field used the human body as a communication line, and formed around the body carrier sense multiple communication methods (CSMA / CD) to transmit / by having a plurality of peripheral devices having a communication device for receiving the vicinity of the human body, correct the directional problem of the antenna that can occur when using the wireless box and addition it can be reduced in size and, there is an effect that can increase the efficiency of communication in accordance with the use of the most appropriate frequency for the human body communication without collision of signals transmitted / received between the plurality of peripheral devices. Human body communication, biological medium, carrier sense multiple communication methods (CSMA / CD), a communication device, transmitter, receiver, signal collision detecting unit, interface unit