Abstract:
A map contents service device and a service method thereof based on location and direction information capable of supplying map contents are provided to supply an efficient service by using the contents location and direction are together stored. A contents management unit(121) manages a map contents management server. The contents management unit searches the contents or the digital map with reference to the index stored in an index storage unit(122). The contents management unit stores in the index storage unit by working map contents or digital map. The index storage unit stores the index about the contents whether the paper is stored in map contents storing units of the contents storage server.
Abstract:
An image monitoring camera and a method using collaboration between cameras are provided to perform an image monitoring function through collaboration between the cameras even when a server is down. When a monitoring standby command or event is received(S400), an image monitoring camera is converted into a monitoring standby state that performs an image monitoring function(S402). If a monitoring situation occurs, an event is generated(S404). The event is transmitted to another image monitoring camera(S406). If the image monitoring camera is converted into the monitoring situation state, data of a taken image is stored in a camera image storage unit of the image monitoring camera.
Abstract:
A video recording system and a method thereof capable of installation and execution of a software module for increasing the effectiveness of monitoring are provided to perform various digital video surveillance functions without the change of the digital video recording system and perform the upgrade of the software module. A software module storing unit(14) stores a plurality of software modules having a software module storage. A software module selecting unit(13) selects a software module transmitted with each image monitoring camera. A software module transmitting unit(12) transmits the software module selected in the software module selecting unit than in each image monitoring camera. A software module execution result output unit outputs the software module execution result transmitted from each image monitoring camera.
Abstract:
A system and a method for tracking a location of a mobile body are provided to efficiently process information of a wireless sensor network managing each base station in middleware managing a plurality of base stations, thereby increasing accuracy of tracking a location of the mobile body. A wireless sensor network(210) senses connection of a mobile node and generates and transmits a connection generating message to a base station. The base station(230) collects location information and connection information from sensor nodes and transmits the information to middleware. The middleware collects and filters the location information and connection information of the sensor nodes and provides the information by a mobile body tracking application. The mobile body tracking application tracks a location of a mobile node by using location information of the mobile node received through middleware.
Abstract:
A method and an apparatus for estimating a channel in a wireless communication system are provided to correct the distortion of a size and a phase by estimating the channel by a mid-amble and performing the channel equalization when the predetermined symbol passes through the cannel. An initial channel estimating value is generated by using the preamble extracted from a receiving signal(S102). Whether a mid-amble is between data symbols continuously in a preamble is determined(S104). If the mid-amble exists, a first channel estimating value is obtained by using the mid-amble(S105). A second channel estimating value is obtained by using the first channel estimating value and the initial channel estimating value(S106). The distortion is corrected by performing the channel equalization by the second channel estimating value(S107).
Abstract:
A method for transceiving beacons between wireless nodes is provided to enable nodes which receive the beacons to discover neighboring nodes by using the beacons and update information of the neighboring nodes by making all nodes periodically transmit beacons. Each wireless node sets up their beacon transmission time and determines the set beacon transmission time(S202). If the beacon transmission time comes, each wireless node determines whether a channel is in an idle state. If the channel is in an idle state, each wireless node performs the back-off operation and transmits beacons(S204). Each wireless node resets the next beacon transmission time immediately after transmitting the beacons(S205).
Abstract:
본 발명은 교통안전서비스 제공방법 및 교통안전시스템에 관한 것이다. 본 발명에서 노변장치는 교차로의 진입로들에 설치된 도로고정센서들을 통해 실시간으로 도로상태정보를 수신하고, 수신한 도로상태정보를 이용하여 각 진입로별 최소안전거리를 주기적으로 추정한다. 이후, 서비스 대상인 차량이 진입로로 진입함에 따라 차량 내 설치된 센서들을 통해 수집한 차량상태정보를 전송하면, 노변장치는 수신된 차량상태정보와 해당 진입로의 최소안전거리, 교차로 지리정보 등을 이용하여 교통안전지수를 산출한다. 그리고, 산출된 교통안전지수를 이용하여 해당 차량의 교차로 진입 추정 시간 등의 교통안전정보를 생성하여 해당 차량으로 전달한다. 교차로, 센서 망, 진입로, 최소안전거리, 교통안전
Abstract:
본 발명은 실내 무선 측위 장치 및 방법에 관한 것으로, 무선통신용 액세스 포인트로부터 송출된 제1신호를 수신하여 상기 수신된 제1신호의 세기를 측정하는 신호수신부, 상기 신호수신부에서 측정된 제1신호의 세기와 현재 위치한 실내 공간에 대한 시뮬레이션을 통하여 예측된 제2신호 세기가 기록된 테이블을 비교하여 현재 위치를 추정하는 위치추정부로 구성되며, 빠르고 정확한 Fingerprint용 Database를 제작하고, 이 Database 기반으로 단말 및 서버에서 단말의 위치 정보를 계산할 수 있다. 실내 무선 측위, 액세스 포인트, Fingerprint용 Database
Abstract:
An indoor wireless positioning method and an indoor wireless positioning apparatus are provided to estimate the current position of a user by using wireless communication schemes, such as WLAN(Wireless Local Area Network), Bluetooth, and UWB(Ultra-Wide Band). An indoor wireless positioning apparatus includes a signal receiver(510) and a position estimator(520). The signal receiver receives a first signal, which is transmitted from a wireless communication AP(Access Point), and measures the amplitude of the first signal. The position estimator compares the amplitude of the first signal with the amplitude of a second signal, which is estimated by using a simulation on the current indoor space, and estimates the current position based on the comparison result. The amplitude of the second signal is recorded on a table.
Abstract translation:提供室内无线定位方法和室内无线定位装置,通过使用WLAN(Wireless Local Area Network,无线局域网),蓝牙和UWB(超宽带)等无线通信方式来估计用户的当前位置。 室内无线定位装置包括信号接收器(510)和位置估计器(520)。 信号接收器接收从无线通信AP(接入点)发送的第一信号,并测量第一信号的振幅。 位置估计器将第一信号的振幅与通过使用当前室内空间的模拟估计的第二信号的振幅进行比较,并且基于比较结果来估计当前位置。 第二信号的幅度被记录在一个表上。
Abstract:
An information providing system using a sensor node with a lightweight web server, and a method therefor are provided to enable a user to search the local contents of the sensor node by a medium of a sink node connected to sensor nodes distributed to a wide area through a wireless network and enable the sensor node to perform a distribution server function by searching between sink nodes connected to each other, thereby searching and downloading desired contents in a short time. An information providing system using a sensor node comprises the sensor node(100), a central server(400), a user terminal(300), and a sink node(200). The sensor node has a lightweight web server in an internal sensor module, makes information contents into a web document, and transmits the web document. The web server detects the information contents in realtime through an allocated IP(Internet Protocol) address. The central server divides, synthesizes, and stores contents received from the sensor node by detection item. The user terminal requests the central server to provide information to the user terminal and receives the information. The sink node is connected to the sensor node through a wireless network, has the lightweight web server in the inside, and transmits the contents for the contents search request of the user terminal.