Abstract:
본 발명은 (a) 연결할 센서 노드의 리스트에 포함된 센서 노드 중 임의의 센서 노드와 상기 임의의 센서 노드로부터 가장 가까운 거리에 위치하는 다른 센서 노드를 선택하는 단계와, (b) 상기 임의의 센서노드와 상기 다른 센서 노드의 위치 정보를 이용하여 임의의 릴레이 노드의 위치를 계산하는 단계 및 (c) 상기 임의의 센서 노드와 다른 센서 노드를 연결할 센서 노드들의 리스트로부터 삭제하고, 상기 임의의 릴레이 노드를 배치된 릴레이 노드들의 리스트에 추가하는 단계를 포함하는 릴레이 노드 배치방법과 이를 수행하는 릴레이 노드 배치장치 및 상기 릴레이 노드 배치방법을 수행하는 프로그램을 기록한 컴퓨터로 읽을 수 있는 기록매체에 관한 것이다.
Abstract:
PURPOSE: A method and a device for arranging relay nodes, and a computer recordable medium thereof are provided to efficiently and rapidly calculate an arrangement location of a relay node. CONSTITUTION: A memory(230) stores location information of a sensor node included in a list of sensor nodes to be connected and a relay node included in a list of arranged relay nodes. A control unit(220) performs a relay node arrangement method using information stored in the memory. A data receiving unit(240) receives information related to the sensor nodes included in the list of the sensor nodes which will be connected.
Abstract:
수직 빔 폭을 조정하여 복수의 방사 패턴을 제공하는 안테나 및 안테나 구성 방법이 제공된다. 안테나는, 복수의 방사 패턴을 제공하는 집중 회로 소자부, 및 제어데이터에 기초하여 복수의 방사 패턴들 중 어느 하나를 선택적으로 제공하는 스위칭부를 포함할 수 있다.
Abstract:
본 명세서는 내장형 운영체제 기반의 고장 감지 시스템에 있어서, 데이터를 복사하며, 상기 복사된 데이터 각각을 전송하기 위한 데이터 분배 모듈; 데이터의 수신, 연산 및 출력에 대한 동작을 수행하며, 각 동작의 성공을 알리는 제 1 메시지를 전송하는 프라이머리 컴퓨터; 상기 프라이머리 컴퓨터와 동일한 동작을 수행하며, 상기 프라이머리 컴퓨터에서 전송되는 상기 제 1 메시지에 기초하여, 상기 프라이머리 컴퓨터의 고장 여부를 감지하기 위한 적어도 하나의 쉐도우 컴퓨터; 및 상기 프라이머리 컴퓨터 및 상기 쉐도우 컴퓨터로부터 출력되는 데이터를 수신하며, 상기 수신된 데이터 중 어느 하나를 외부로 전송하기 위한 데이터 스위칭 모듈을 포함하여 이루어진다.
Abstract:
PURPOSE: A system and method for monitoring a road slope collision are provided to take prior measures before a section is collided by predicting possibilities of a road slope collision based on underground information of the road slope. CONSTITUTION: A method for monitoring a road slope collision is as follows. Underground information of a road slope is measured. Whether the measured underground information is exceeded a critical value of the underground information based on possibilities of a road slope collision or not is confirmed. If the measured underground information is exceeded the critical value, an inclination of the road slope is measured by driving a sensor. If the measured inclination of the road slope is exceeded a critical inclination value, the road slope is decided to be collided.
Abstract:
PURPOSE: A virtualization embedded system and a method thereof are provided to implement fast response and memory saving, and to be applicable to a micro embedded device at which a hardware swapping device is hard to be installed, by quickly compressing and storing a part of the memory of an auxiliary virtual machine with a memory compression and swapping tool in order to secure insufficient available memory when the memory of a main virtual machine in a virtualization-applied embedded system is insufficient. CONSTITUTION: A memory compression and swapping method in a virtualization embedded system includes the following steps: a memory shortage occurrence step(a) where a memory shortage occurs in a main virtual machine; a memory delivery step(b) where memory is delivered to the main virtual machine because the memory of an auxiliary virtual machine needs to be reduced and the memory of the main virtual machine needs to be increased due to the memory shortage occurrence in the main virtual machine; a memory securing step(c) where the auxiliary virtual machine secures memory in case available memory is insufficient during the process of memory reduction in the auxiliary virtual machine; a step(d) of swapping out a part of memory data in case the memory is still insufficient after the memory securing of the auxiliary virtual machine; a memory data compression step(e) where the swapped memory data is transmitted to the main virtual machine and compressed by a memory compression and swapping tool; and a storage and mapping step(f) where the compressed data is stored in the memory of the main virtual machine, and the address of stored location and the address of the swapping device are mapped. [Reference numerals] (a) Memory shortage occurs in a main virtual machine; (AA) Start; (b) Deliver memory from an auxiliary virtual machine to the main virtual machine; (BB) End; (c) Secure the memory of the auxiliary virtual machine; (d) Swap out a part of memory data of the auxiliary virtual machine; (e) Compress the swapped memory data by a memory compression and swapping tool; (f) Store the compressed memory data and map a storage address and a swapping device address
Abstract:
Disclosed is a sensor node deployment method for a sensor network. According to embodiments of the present invention, the convenience of use and the utilization of a sensor network system are improved by determining the optimum position of a sensor node by automatically analyzing a system feature element, a human element, and an environmental element affecting a sensor node deployment. The present invention is applied in an unmanned monitoring boundary field about a main facility or a weak monitoring area, which is difficult for a human to approach, by improving the technical reliability of a wireless sensor network by arranging a sensor node in a position with the maximum coverage in a cell. [Reference numerals] (140) Additionally arrange a sensor node; (AA) Start; (BB,DD,EE) No; (CC,FF,GG) Yes; (HH) End; (S10) Collect information about the number(Ns) of the sensor nodes and area; (S100) Calculate a maximum value(Cmax) of a sensor coverage; (S110) C_max > Threshold(T_c)?; (S120) Confirm the position of the sensor node at an x-position; (S130) Position control area ends?; (S20) Calculate a sensor detecting distance by applying a weight; (S30) Basic cell quantity(Nc) TKSCNF; (S50) Control the size of cells; (S60) Grid-arrange the sensor node according to the controlled cell; (S70) Grid-arrange the sensor node according to a basic cell gap; (S80) Set a position control area of the sensor node in the cell; (S90) Calculate the sensor coverage while moving the sensor node in the position control area