Abstract: A calling device for calling and communicating with a driver of a vehicle with a low power by using a Low Power Wide Area Network (LPWAN) such as a LoRa communication network and a calling method thereof are disclosed. The calling device according to the invention may be installed in a vehicle and transmit/receive data to/from a management server through the LPWAN. The calling device transmits a calling message to a driver terminal by recognizing a user's tapping, touching, etc., and when the driver confirms the calling message, display to the caller that the driver confirms the calling message. In addition, the calling device also allows the caller to call the driver directly by displaying the driver phone number if the driver does not confirm the calling message in time.

Abstract: The present invention relates to distributing and relaying a signal from two or more femtocells to several antennas by using a UTP line. That is, the present invention relates to a dual-band UTP femto distribution/relay device for combining two or more femtocells into a single signal, transmitting the signal through a UTP cable and wirelessly transmitting and receiving the signal remotely with a terminal.

Abstract: The present invention relates to fine-tuning a time delay of a relay device that distributes and relays a signal from a femto base station to several antennas by using an unshielded twisted pair cable (UTP). That is, by measuring a UTP time delay between a signal distribution device, which is a component of a UTP femto distribution and relay device, and a plurality of remote signal transmission and reception devices, respectively, a cable time delay between devices is corrected so that the plurality of remote signal transmission and reception devices may relay femtocell signals at the same time.

Abstract: The present invention relates to fine-tuning a time delay of a relay device that distributes and relays a signal from a femto base station to several antennas by using an unshielded twisted pair cable (UTP). That is, by measuring a UTP time delay between a signal distribution device, which is a component of a UTP femto distribution and relay device, and a plurality of remote signal transmission and reception devices, respectively, a cable time delay between devices is corrected so that the plurality of remote signal transmission and reception devices may relay femtocell signals at the same time.

Abstract: The present invention relates to distributing and relaying a signal from two or more femtocells to several antennas by using a UTP line. That is, the present invention relates to a dual-band UTP femto distribution/relay device for combining two or more femtocells into a single signal, transmitting the signal through a UTP cable and wirelessly transmitting and receiving the signal remotely with a terminal.