Mobile device for performing power line communication and operating method thereof

A mobile device comprising:

• a power line communication (PLC) module configured to communicate data with an external device via a power line, receive a first preamble signal from the external device during a preamble interval, and receive the data during a first data reception interval following the preamble interval;
• a frequency/duty detector configured to detect a frequency and a duty of the first preamble signal and provide a detected frequency and a detected duty for interpreting bits of data to be received, wherein a timing for determining a logical state of the data varies as a detected duty varies;
• and
• a control circuit configured to determine the data received from the external device using at least one of the detected frequency and the detected duty,
• wherein the PLC module is further configured to receive the data in a data period having a rate corresponding to the detected frequency,
• wherein the control circuit is further configured to determine a logical state of the data at a timing corresponding to the detected duty in every data period,
• wherein, as the duty of the first preamble signal varies, the timing of determining the logical state of the data varies within the every data period,
• wherein the PLC module is configured to receive a second preamble signal from the external device during a second preamble interval and receive a voltage signal during a second data reception interval following the second preamble interval, and
• wherein, based on the frequency/duty detector determining that the frequency and the duty of the first preamble signal are different from the frequency and the duty of the second preamble signal, the frequency/duty detector is configured to detect that a data reception frequency in the first data reception interval is different from a data reception frequency in the second data reception interval and to determine that a timing of a logical state of the data in a single data period in the first data reception interval is different from a logical state of the data in the second data reception interval.

An operating method of a mobile device communicating data with an external device via a power line, the operating method comprising:

• receiving a plurality of first preamble signals respectively transmitted in a plurality of intervals of a first preamble interval from the external device via the power line;
• detecting a frequency and a duty of the plurality of first preamble signals to provide a first detected frequency and a first detected duty for interpreting bits of data to be received, wherein a timing for determining a logical state of the data varies as a detected duty varies based on the received plurality of first preamble signals;
• receiving first data from the external device during a first data reception interval;
• and
• determining the first data according to a first data period corresponding to the first detected frequency and a timing corresponding to the first detected duty,
• wherein, as the duty of the plurality of first preamble signals varies, a timing of determining a logical state of the first data varies within a single data period;
• receiving a plurality of second preamble signals from the external device during a second preamble interval;
• and
• receiving a voltage signal during a second data reception interval following the second preamble interval,
• based on the frequency and duty of the first preamble signals being different from the frequency and the duty of the second preamble signals, determining that a data reception frequency in a first data reception interval is different from a data reception frequency in the second data reception interval, and determining that a timing of determining a logical state of the data in a single data period in the first data reception interval is different from a logical state of the data in the second data reception interval.