Pusan National University

Young-Hwan Yoo

Sungryul Kim

Joonyoung Lim

Youngjin Shin

Jin-Hwan Kim

A system and method for detecting and notifying access to a dangerous area in a workplace using image processing and location tracking technology are disclosed. The system includes a server configured to partition a workplace into grating sections to assign coordinates, set a dangerous object or a dangerous area, and broadcast a notification message including coordinates of the dangerous object and information on the dangerous area, and smart glasses configured to display a grating of an adjacent dangerous area or an adjacent dangerous object in an augmented reality mode by using the coordinates of the dangerous object or the information on the dangerous area that are received.

System and method for detecting and notifying access to dangerous areas in workplace using image processing and location tracking technology

A Long Range (LoRa) communication system with an improved data rate and method thereof are provided. When a packet to be transmitted is received, a transmission device determines a transmission scheme. When the determined transmission scheme is an enhanced transmission scheme, the transmission device transmits a preamble signal indicating that a packet is to be transmitted using the enhanced transmission scheme, converts n-th data of the packet to an up-chirp signal, converts (n+1)-th data of the packet to a down-chirp signal, generates a transmission signal by adding the n-th data converted to the up-chirp signal and the (n+1)-th data converted to the down-chirp signal, and transmits the transmission signal to a reception device.

Long range (LoRa) communication system and method with improved data rate

Provided are an adaptive data rate control method and an adaptive data rate control system. The adaptive data rate control method may include collecting a data rate used by each of terminals connected to a network through a gateway; counting the number of terminals for each section of the data rate; comparing the counted number of terminals for each section to the optimal number of terminals that are allocated to a corresponding section based on an overall network throughput; determining a terminal included in a mismatch section as a result of the comparing as a target terminal of which the data rate is to be controlled; and transmitting a command packet for controlling the data rate to the target terminal through the gateway.

Adaptive data rate control method and adaptive data rate control system

Provided are an active radio frequency identification (RFID) system for port logistics and a communication method in the RFID system in which the forms of commands and response messages in the current standard are not changed in order to maintain compatibility with the current standard and to support multi-hop communication and some fields that are not generally used are used so as to enable communication between a tag in a shadow area and a reader by multi-hop communication using other surrounding tags.

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Busan, South Korea

Young-Hwan Yoo