Abstract:
PURPOSE: A camera sensor arranging method, a WSN(Wireless Sensor Network) system using the same, and recording medium for the same are provided to calculate an effective sensing area in consideration of the property of a camera sensor. CONSTITUTION: The top side, bottom side, and height of sensing areas(SA1,SA2) are calculated by using a control parameter and a sensor specification parameter supplied from a plurality of camera sensors(CS1,CS2). The width and length of a road are calculated. A plurality of the sensing areas covers all areas to monitor the road. A plurality of the camera sensors is arranged in order to match side lines and bottom lines.
Abstract:
무선 센서 네트워크의 이벤트 감지성능을 만족하는 효율적 카메라 센서 배치 방법, 이를 이용한 무선 센서 네트워크 시스템 및 이를 위한 기록 매체를 공개한다. 본 발명은 도로 감시용 무선 센서 네트워크에서 감시될 도로의 폭과 길이, 카메라 센서의 유효 시야각 및 통신 반경 등을 고려하여, 카메라 센서의 사다리꼴 형태의 유효 센싱 영역을 계산하고, 계산된 유효 센싱 영역을 기초로 하여 카메라 센서를 배치한다. 따라서 주어진 도로 환경에 맞추어 최소의 비용으로 완전한 이벤트 감지 성능을 보장할 수 있다.
Abstract:
PURPOSE: A method and apparatus for controlling a power line communication are provided to perform the power line communication without the interference of a feeding line in case of the on or off of a feeding segment for an electric vehicle on a road. CONSTITUTION: A feeding segment(110) is installed along a road direction. An inverter(120) supplies AC power to a feeding road. A common line(130) transmits AC power from the inverter along a road. A feeding line(140) transmits power from the common line to each feeding segment. A power line communication control device(200) performs a power line communication without the interference due to currents flowing in the common line or feeding line.
Abstract:
PURPOSE: A mobile terminal and a handover selection method for minimizing power consumption in heterogeneous network handover are provided to classify wireless interfaces in a state combination for inter-heterogeneous network handover and apply heterogeneous handover strategy according to each state combination thereby performing inter-heterogeneous network handover. CONSTITUTION: If A2 condition(210) is in (WiBro:Idle, HSDPA:Idle(Low-Power)) state or C1(400), C2(410) or C3 condition(420) is in (WiBro:Active, HSDPA:Idle(Low-Power)) state, a mobile terminal changes to (WiBro:Idle, HSDPA:Active) state. If A1 condition(200) or A2 condition is in the (WiBro:Idle, HSDPA:Idle(Low-Power)) state or B1 condition(300) is satisfied in (WiBro:Idle, HSDPA:Active) condition, the mobile terminal changes to the (WiBro:Active, HSDPA:Idle(Low-Power)) state.