Abstract:
임베디드 시스템에서 주 어플리케이션과 보조 어플리케이션의 메모리 요구량이 물리 메모리 크기보다 클 경우 일부 메모리를 스왑아웃 시켜줘야 한다. 하지만 대부분의 임베디드 시스템에는 스왑을 위한 디스크를 마련해두지 않고, 현재 소형 모바일 기기에서 사용되는 플래시메모리는 특성상 스왑에 어울리지 않다. 따라서 본 특허에서는 데이터를 압축하여 메모리 상에 저장함으로써 이와 같은 문제를 해결한다. 본 발명은 가상화가 적용된 임베디드 시스템에서의 주 가상 머싱의 메모리가 부족할 경우, 모자라는 가용 메모리를 확보하기 위하여 메모리 압축 스왑 도구를 이용하여 보조 가상머신의 메모리 중 일부를 신속히 압축하여 저장함으로써 빠른 응답성과 메모리 절약을 실현하고, 하드웨어 스왑 장치 설치가 곤란한 초소형 임베디드 기기에도 적용이 가능한 효과가 있으며, 스마트 폰 및 스마트 TV에서도 사용 가능하다.
Abstract:
PURPOSE: An operation control system for controlling real-time errors and a device thereof are provided to enable a second operation device to check errors of the output data of a first operation device and to display the output data of the second operation device, thereby rapidly outputting error-free data. CONSTITUTION: First and second operation devices (200,300) execute multiple operations for input data. The first and second operation devices select one of operation data, which is generated by the multiple operations, as first result data. The first operation device generates a first output message including the first result data. The second operation device checks the error of the first operation device by using the first output message. An output device (400) selectively outputs the first result data and the second result data according to errors. [Reference numerals] (100) Input device; (110,410) Communication unit; (120,420) Control unit; (200) First operation devices; (300) Second operation devices; (400) Output device
Abstract:
PURPOSE: Multiple sensor nodes scattering device and a wireless sensor network construction device including the same are provided to stably collect sensing signals by syntagmatically scattering sensor nodes to the ground. CONSTITUTION: A wireless sensor network construction device(100) includes a plurality of sensor nodes(110) and a sensor node scattering device(120) for scattering the plurality of the sensor nodes. The sensor node scattering device scatters the plurality of the sensor nodes to the ground by using an aircraft or a balloon. When the sensor nodes are arranged on the ground, the sensor nodes construct a wireless network with the sensor node scattering device. The sensor node scattering device syntagmatically scatters the plurality of the sensor nodes at a predetermined height.
Abstract:
PURPOSE: A security sensing apparatus and method are provided to minimize wrong alarm rate of target detection and to minimize power consumption of a sensor. CONSTITUTION: A plurality of sensors(100,101) detects an intruder in an area of a pre-sensing step, a sensing step, and a post sensing step. A plurality of amplifiers(110,111) amplifies a signal of the plurality of sensors. A switch(120) switches the signal entered from the plurality of amplifiers. A distributor(130) distributes the signal entered from the switch. A plurality of analog to digital converters changes the signal entered from the distributor into a digital signal. A main control processor(150) controls the switch and the distributor and performs a signal processing algorithm by receiving the digital signal entered from one among the plurality of analog to digital converters changes. A signal dedicated processor(160) receives the digital signal entered from another analog to digital converter and signal-processes it. [Reference numerals] (100) Sensor 1; (101) Sensor 2; (AA) Control signal; (BB) Main control processor; (CC) Sensor data; (DD) Switch; (EE) Distributor; (FF) Signal exclusive processor
Abstract:
PURPOSE: A system and a method for efficiently sensing an intruder are provided to maintain accuracy while minimizing power required for the maintenance of the system. CONSTITUTION: A sensor node(100) of an invasion detecting system comprises an intruder detecting sensor(110) and a position detecting sensor(120). The intruder detecting sensor senses an intruder within a constant distance. The position detecting sensor is driven when the intruder is detected and confirms the location of the intruder.