Method and device for determining a position of a communication apparatus

A computer readable medium comprising a non-transitory readable medium storing a computer program, which on a program-controlled device performs a method for determining a position of a first apparatus, the method comprising:

• transmitting a first signal from a second apparatus to the first apparatus;
• transmitting a second signal from the first apparatus to the second apparatus as a response to the first signal received by the first apparatus;
• measuring a signal strength of the second signal received by the second apparatus;
• measuring a transfer time from a first time of transmission of the first signal to a second time of receipt of the second signal;
• and
• calculating the position of the first apparatus as being a first possible position of the first apparatus as determined as a function of the measured signal strength of the received second signal when the first possible position as determined as a function of the measured signal strength is the same as a second possible position of the first apparatus as determined separately as a function of the measured transfer time of the received second signal.

A device for determining a position of a first apparatus, comprising:

• a transmit means configured to transmit a first signal to the first apparatus, the first signal being suitable to initiate transmission of a second signal from the first apparatus receiving the first signal;
• a receive means configured to receive the second signal sent by the first apparatus;
• a first measuring means configured to measure the signal strength of the received second signal;
• a second measuring means configured to measure a transfer time from a first time of transmission of the first signals to a second time of receipt of the second signal;
• and
• a calculating means configured to calculate the position of the first apparatus as being a first possible position of the first apparatus as determined as a function of the measured signal strength of the received second signal when the first possible position as determined as a function of the measured signal strength is the same as a second possible position of the first apparatus as determined separately as a function of the measured transfer time of the received second signal.