Device for control of data transfer in local area network

A wearable electronic communication device for a portable electronic communication device, the wearable device being adapted for Body Coupled Communication (BCC) and capacitance measurement in close proximity to a person's body and comprises:

• an antenna adapted for the BCC;
• a sensor adapted for detecting if a capacitance belongs to a predefined capacitance interval or range indicating that the wearable device is in close proximity to the head or other body part of the person or even in contact with the body or not, and processing circuitry in operational connection with the antenna and the sensor for control of the BCC and capacitance measurement, wherein
• the antenna and the capacitance sensor are one and the same entity adapted to be utilized as one common electrode for both the BCC and the body capacitance measurement of the wearable device, whereby the body capacitance measurement and the BCC are accomplished by means of processing circuitry comprising differing impedances when using the common electrode for body capacitance measurement and when using the common electrode for BCC.