Abstract:
PURPOSE: An apparatus for managing a controlling node, a method for the same, a growing environment sensor network system using the same are provided to reduce the overhead of a data frame by managing data for the controlling node at a separate server. CONSTITUTION: A data analyzing part(31) analyzes data collected from a sensor node. The data analyzing part selects a controlling node containing a controlling device to be controlled. A server accessing part(32) communicates with a managing server(50) saving and managing metadata. A metadata acquiring part(33) acquires the metadata related to the controlling device contained in the selected controlling node.
Abstract:
PURPOSE: An apparatus and a method for managing a slot are provided to manage a slot through the three times of command frame exchange and the primitive exchange of MLME(MAC sublayer management entity) and an upper layer. CONSTITUTION: A node 3 transmits a DSME-GTS(Deterministic And Synchronous Multi-Channel Extension Guaranteed Time Slot) request command for requesting the allocation of a slot to a node 1(S310). The DSME-GTS request command includes the number of a requested slot and information about a current DSME slot allocation bit-map sub block. DSME SAB(Slot Allocation Bitmap), sub block information has a bit-mapped form. The node 1 broadcasts assigned slot information and a DSME-GTS response command, which includes a destination address, to an adjacent node(S320). The assigned slot information includes the DSME SAB sub block information A node 3 broadcasts the slot information assigned to inform an allocation result to the adjacent node and the DSME-GTS notification command including the destination address to the adjacent node(S330).
Abstract:
PURPOSE: A constant amplitude decoding apparatus and method are provided to determine whether vertical direction decoding and horizontal direction decoding are repeatedly executed or not by restoring a constant amplitude multiplexed signal to a two dimension signal. CONSTITUTION: Inverse diffusion and inverse multiplexing module(110) receive data row of constant amplitude. The inverse diffusion and diverse multiplexing module inversely diffuses and multiply the data row of constant amplitude and restores to a two dimension signal. A decoding module(120) executes vertical direction decoding about the two dimension signal. A control module(130) determines whether the vertical direction decoding and horizontal direction decoding are repeatedly executed or not. A bit row information output module outputs a result which is decoded by the decoding module to a bit row.
Abstract:
본 발명은 무선 단말기를 이용하여 전자투표를 실시하는 전자투표 장치 및 전자투표 방법을 제공한다. 본 발명에 의한 전자투표 장치는 이동통신망을 통해 투표자의 무선 단말기로부터 전송받은 인증서를 기초로 투표자를 인증하는 투표자 신원확인부와, 상기 무선 단말기에 투표 내용의 암호화를 위한 암호키를 생성하여 전송하는 암호키 관리부와, 상기 무선 단말기에 선거 후보가 포함된 투표 정보를 전송하는 투표정보 제공부와, 및 상기 투표 정보를 기초로 상기 투표자가 투표한 결과 정보를 포함하는 암호화된 투표 내용에서 상기 투표자의 개인 식별정보가 삭제된 암호화된 투표 내용을 복호화하여 저장하는 투표결과 저장부를 포함한다. 상기 장치에 의해 간단하고 편리한 방법으로 투표에 참여할 수 있어 시간적, 공간적 제약을 적게 받으며 투표율을 높일 수 있고, 비밀성과 익명성이 보장된다. 전자투표, 무선 단말기, 무선공인인증서, 이동통신, 전자투표 장치
Abstract:
A system and a method for informing vehicle accidents using a telematics terminal are provided to prevent the vehicle accidents by informing messages related to the vehicle accidents to the telematics terminal directly. A network between vehicles is set through telematics terminals, which are mounted on vehicles, using Ad-hoc communication scheme(200). An impact is detected through a vehicle sensor which is mounted on vehicles, and the impact data is transmitted to the telematics terminals(201). The degree of accident is determined based on the impact data by the telematics terminals(202). The vehicles are controlled by the degree of the accident(202-1,202-2). An accident informing message is transmitted to the telematics terminals, which are connected through the network(203).
Abstract:
A method and an apparatus for predicting wired/wireless network traffics through probabilistic traffic characteristic estimation are provided to model characteristics of dynamically-changed traffics, and extract probabilistic characteristics of the traffic from limited sampling data, thereby probabilistically predicting effects of traffics, applied to a specific flow or a specific link, on service quality of the other flow or link for providing services within a network. A frame of a flow flowed into a variation band traffic within a preset time in wired/wireless networks is sampled(S601,S602). A probability distribution function for a continuous function corresponding to a histogram of continuous frame duration extracted through the sampling, continuous frame duration configured from frame pause period data and continuous frame appearance period is calculated(S609). Through the flow frame sampling increase, the probability distribution function of the continuous frame duration and the continuous frame appearance period is modified. Based on the modified probability distribution function, the traffic is predicted.
Abstract:
A telematics device for updating road surface information and a method thereof are provided to update the road surface information by connecting to a road management server, and enable a driver to avoid obstacles by using the road surface information and road information. A controller(201) recognizes obstacles on a road by using road surface information received from a sensor(220) attached to a vehicle and road information received from a road management server. The road information includes previous road surface information. A transceiver(211) transmits recognized road obstacle information to the road management server. A vehicle controller(205) decelerates, stops, or turns the vehicle according to a command of the controller to avoid the obstacle on the road by considering a type and a size of the recognized obstacle. The road management server updates the road surface information based on the road obstacle information received from the telematics device. The sensor is at least one of a camera or an ultrasonic sensor.
Abstract:
A method for improving TCP(Transmission Control Protocol) performance by congestion window limit is provided to provide an efficient service and a stable multimedia service by maintaining a congestion window at such a size as not to generate packet accumulation and preventing an unnecessary loss for checking an available bandwidth to thus obtain optimum performance and stable characteristics regardless of a buffer size. When a network connection is established(101), it is checked whether a service is a fixed bandwidth service(102). When the service is a fixed bandwidth service, a maximum congestion window is preferentially and quickly set by using an available bandwidth prediction method(103). A minimum round trip delay is calculated(104) and an effective optimum congestion window is calculated by using the calculated minimum round grip delay value(105). The calculated optimum congestion window is applied to control a TCP congestion window(106). When an available band increases while the congestion window is being applied(107), the maximum congestion window is updated by obtaining an additional band(108).
Abstract:
본 발명은 대규모 지형 모델과 같이 방대한 규모의 데이터를 갖는 모델을 실시간 3차원적으로 컴퓨터 시스템에 표현하기 위한 장치 및 방법에 관한 것이다. 본 발명에 따른 다단계 해상도를 갖는 3차원 이미지 표현 장치는, 하위 계층(m+1 레벨)의 삼각형 패치는 k*k(k는 상위 계층의 가로 및 세로 그리드 수)개의 상위 계층(m 레벨)의 삼각형 패치들을 포함하고, 각 계층은 서로 다른 해상도를 갖는 다단계 해상도의 계층적 메쉬(mesh)를 구성하며, 대상 이미지에 대한 높이 정보를 정규적으로 샘플링하여 상기 계층적 메쉬에 포함된 삼각형 패치들의 각 꼭지점에 할당하는 패치 구성부; 가상 카메라의 시점에 따라서 각각의 삼각형 패치에 대한 해상도를 결정하는 해상도 결정부; 및 상기 계층적 메쉬에 포함된 삼각형 패치들 중 인접한 삼각형 패치 간에 해상도가 다른 경우, 상기 인접한 삼각형 패치를 서로 틈새 없이 연결하는 패치 연결부를 포함하는 것을 특징으로 한다. DEM, PM, ROAM, MESH, GIS, 가상현실, 지형 모델, 컴퓨터 그래픽스
Abstract:
보조 저장 장치가 없는 환경에서 실시간 패치 장치 및 그 방법이 개시된다. 패치 서버는 최신 버전의 실행 모듈들에 대한 정보를 나타내는 패치 테이블 및 패치 데이터를 포함하고, 콘솔은 패치 서버로부터 수신한 패치 테이블을 기초로 소정의 기록 매체로부터 읽은 실행 모듈의 패치 여부를 파악하고, 패치가 필요한 경우 패치 데이터를 패치 서버로부터 수신하여 소정의 기록 매체로부터 읽은 실행 모듈을 최신 버전으로 업데이트한다. 이로써, 프로그램을 최신 버전으로 실시간 패치할 수 있다. 실시간 패치, 실행 모듈, 패치 서버, 패치 데이터, 최신 버전