Abstract: A non-line-of-sight radar apparatus includes a first radar receiver to convert a first frequency radar signal received through a non-line-of-sight into a digital signal and to output a first path signal; a first signal processor to receive a second path signal from a direct-line-of-sight detection apparatus detecting a direct-line-of-sight, to cancel a direct-line-of-sight signal irrelevant to the non-line-of-sight included in the first path signal using the second path signal, and to extract a non-line-of-sight signal; and a first signal detector to detect an object on a non-line-of-sight based on the non-line-of-sight signal.

Abstract: A low power wide area (LPWA) apparatus includes an LPWA module configured to perform first encrypted communications using a gateway and a session key, generate a secret key to perform a second encrypted communications with an application device, transmit the secret key encrypted using a public key to the application device, and transmit encrypted data based on the secret key to the application device and receive data from the application device.

Abstract: An apparatus for measuring a water temperature in a pipe in which water is carried includes: a temperature measuring sensor configured to be installed on an external surface of the pipe to measure an external surface temperature of the pipe; and a water temperature detector configured to receive the external surface temperature from the temperature measuring sensor, and to determine whether there is water-flow in the pipe based on the external surface temperature at a first measurement time and the external surface temperature at a second measurement time.

Abstract: A method to update firmware of a low power wide area (LPWA) module includes: transmitting, from a gateway, an over the air (OTA) request message including an OTA transmission time to the LPWA module; transmitting, from the gateway, OTA packets including a firmware source to the LPWA module at the OTA transmission time; and receiving, at the gateway, an OTA response message from the LPWA module confirming whether a reception of the plurality of OTA packets is completed.

Abstract: Provide is a radio network system including gateways and end terminals, which includes: a time slot distributing unit configured to distribute time slots by which each of the gateways perform a radio communication, wherein the time slot distributing unit is configured to distribute the time slots such that the closer a distance between each of the gateways, a time difference between beginning points of the time slots becomes longer.

Abstract: A gateway, an electronic information label system and a method for transmitting display information of an electronic information label are provided. The electronic information label system includes a plurality of electronic information labels comprising a segment-type electronic information label and an image-type electronic information label; a management server configured to create display information for the plurality of electronic information labels and transmit the display information to a gateway; and the gateway configured to determine transmission time of the display information based on a display type of an electronic information label to which to transmit the display information and transmit the display information to each of the plurality of electronic information label based on the determined transmission time.

Abstract: An electronic shelf label gateway may include a data storing unit storing original data, a signal processing unit generating an encoded data packet by encoding the original data, a controlling unit controlling transmission of the encoded data packet so as to sequentially perform a first multicast, a second multicast, and a unicast of the encoded data packet until all of a plurality of connected electronic shelf label devices successfully receive the encoded data packet, and a communicating unit wirelessly transmitting the encoded data packet according to controlling by the controlling unit.

Abstract: An electronic shelf label tag includes a communications unit configured to perform wireless communications; a control unit configured to receive and store reservation data before a reserved display time by requesting the reservation data including display information corresponding to the reserved display time through the communications unit and control displaying of corresponding display information included in the reservation data when a current time reaches the reserved display time; a memory unit configured to store the reservation data including the display information corresponding to the reserved display time; and a time management unit configured to provide current time information to the control unit. The control unit may further receive reservation change information on corresponding reservation data before the reserved display time ends and applies the reservation change information to the corresponding reservation data.

Abstract: A wireless communications apparatus may include: a channel monitoring unit monitoring a state of a communications channel according to a first communications standard and providing channel state information; a controlling unit deciding whether or not channel interference is present based on the channel state information; and an interference removing signal generating unit transmitting an interference removing signal to at least one of a plurality of channels adjacent to the communications channel when channel interference is present. Therefore, interference between heterogeneous communications networks may be decreased, such that wireless communications may be more stably performed.

Abstract: Disclosed herein are an audio wireless transmission system including: a video device broadcasting and transmitting audio signal through an industrial scientific medical (ISM) band frequency; and a wireless terminal sensing the ISM band frequency transmitted from the video device and demodulating the audio signal so as to listen to the audio signal, and an audio wireless transmission method using the same, in order for each individual to receive audio signal of a video device in a public place through a wireless terminal possessed by each individual and listen to the audio signal.