Abstract:
A node apparatus for beacon scheduling on ad-hoc network and a method therefore and data transmitting method thereof are provided to change the node of the beacon modes dynamically in which the power source is limited according to the power state and reduce the overhead reconstructing a sensor network. A power monitor(310) checks a residual amount of power. A beacon change reporting unit(320) reports a schedule on change of the beacon transfer interval to the other node in case that a residual amount of power is below standard value. A beacon change part(330) increases the transfer interval of the beacon. A beacon transmission part(340) transmits beacon at increased beacon transfer interval. The node apparatus is a full function device.
Abstract:
A method for preventing data collision in a tree routing-based beacon mode ZigBee system is provided to reduce a data transmission time delay and power consumption caused by re-transmission. Child nodes, which have received a beacon from a parent node and have been synchronized, generate a data packet to be transmitted(S710). The child nodes determine whether to transmit the generated data packet to the parent node or to their child nodes(S720). If the generated data packet is to be transmitted to their child nodes, the data packet is transmitted by an indirect transmission method of an existing CSMA-CA(S740). After a certain guard time lapses, the child nodes perform channel detection and data transmission(S750).
Abstract:
A position-based routing method by using a cell in a wireless sensor network is provided to minimize the energy and to determine a path until a destination node easily by reducing the periodical communication for the position information confirmation. In a next-hop position calculation process, the virtual ONI(Optimal Next-hop Information) among the paths until the destination node is calculated. In a communication area division process(302), the communication area is divided into fixed cell sizes by using the calculated virtual ONI position. In a packet broadcasting process(303), a packet including the virtual ONI position and the cell sizes is broadcasted to the surrounding node in the communication area. In a next-hop node decision process(305), the firstly transmitted surrounding node is determined as the next-hop node after receiving a response message in regard to the broadcasted packet from the surrounding node. In the next-hop position calculation process, the position joined by the virtual segment for connecting the distance until the destination node and a virtual circle corresponding to one's own communication area is calculated and the calculating result is determined as the next hop position.
Abstract:
A method for determining a super-frame for beacon scheduling is provided to allow routers to be smoothly connected to a network by allocating a longer super-frame to routers having a low routing depth, and minimize a data loss and a data transmission time. A coordinator transmits a beacon including information about its super-frame to the first router(801). The first router determines a transmission time and length of its super-frame based on the information about the super-frame of the parent router(namely, the coordinator) received from the parent router(802). The first router checks whether there is a child router that wants to be connected thereto(803). If there is a child router that wants to be connected thereto, the first router transmits the information about the super-frame of its parent router and information about its super-frame to the child router(the third router)(804). The third router determines a transmission time and length of its super-frame based on the information about the super-frames received from the first router and the parent router of the first router(805). The third router checks whether or not there is a child router that wants to be connected thereto(806).
Abstract:
텔레매틱스 단말기를 위한 통합 동기화 엔진 및 통합 동기화 방법이 개시된다. 본 발명은 텔레매틱스 단말기 내부의 동기화 대상이 되는 적어도 하나의 애플리케이션으로부터 애플리케이션이 관리하는 내부 데이터 및 동기화를 위해 공통으로 설정할 사항들이 기록된 동기화 속성 정보를 입력받고, 내부 데이터에 생긴 변경 사항을 기록한 로그 정보를 생성하는 동기화 관리부; 동기화 속성 정보를 분석하여 동기화를 요청하는 애플리케이션에 적용할 통신 방법 및 데이터의 저장 위치를 설정하는 동기화 속성 분석부; 및 로그 정보에서 내부 데이터의 변경 사항을 확인하여 동기화 대상 데이터 지정에 참조하는 로그 정보 분석부;를 포함한다. 본 발명에 따르면, 텔레매틱스 애플리케이션 개발자들은 동기화 엔진에서 제공되는 공통 기능을 활용할 수 있고, 동기화 대상 데이터의 불필요한 로드를 줄이며, 불필요한 데이터 교환을 방지하여 효율적인 동기화를 제공할 수 있다. 텔레매틱스, 동기화, TSP, 텔레매틱스 서비스 사업자
Abstract:
A wireless sensor network and an adaptive method for security management thereof are provided to enable a sensor node to evaluate and monitor the reliability management of adjacent sensor nodes without a waste of insufficient resources. A wireless sensor network includes a BS(Base Station) and plural sensor nodes for relaying information to the BS. The plural sensor nodes includes first second, and third sensor nodes which are arranged adjacently each other. The first sensor node includes a wireless transmission unit(170), a reliability evaluation unit(140), and a security response unit. The wireless transmission unit transmits a message to the BS. The reliability evaluation unit determines the reliability value of the third sensor node. The security response unit compares the reliability value of the third sensor node with a reliability threshold value. The reliability evaluation unit determines the reliability value based on the personal reference of the first sensor node for the third sensor node and the personal reference of the second sensor node for the third sensor node.
Abstract:
An apparatus and a method for supporting an adaptive vehicle are provided to enhance user convenience by using a human modeling scheme based on personal characteristics. An apparatus for supporting an adaptive vehicle includes a statistical database(110), a personal characteristic setting unit(120), and an interface supply unit(130). The statistical database stores and manages a driving operation, an average observation degree of a driver required for vehicle internal state and external environment variations, an interface manipulating degree required for manipulating a vehicle interface, and a similarity degree for representing similarity of vehicle interface functions. The personal characteristic setting unit resets a personal observation degree based on the average observation degree according to at least one of the driving operation, the vehicle internal state, and external environment variations. The interface supply unit determines whether a summation value of the personal observation degree and the interface manipulating degree excesses a safety observation degree value.
Abstract:
본 발명은 차량의 센서 정보의 처리기술에 관한 것으로, 특히 텔레매틱스 단말기와 이씨유의 통신연결을 위한 통신방법 및 차량의 센서 정보 처리방법 및 장치에 관한 것으로, 센서 정보는 차량 이씨유에서 처리되어 통신게이트웨이를 통해 텔레매틱스 단말기에 전달되고 전달된 센서정보는 텔레매틱스 단말기의 소프트웨어 모듈에서 관리된다. 본 발명은 차량 센서정보의 처리를 위한 통신방법과 텔레매틱스 단말기내 센서정보를 전달받아 처리하는 소프트웨어 모듈로 구성된다. 센서정보 처리를 위한 통신방법은 각종 센서들로부터 정보를 받아서 처리하는 차량 이씨유와 텔래매틱스 단말기의 사이에서 통신게이트웨이가 각각 캔통신과 시리얼 통신에 의한 통신 처리를 수행한다. 텔레매틱스 단말기는 캔통신을 위한 별도의 통신모듈 없이 캔통신과 시리얼통신을 연결하는 통신게이트웨이를 통해 이씨유로부터 센서정보를 전달받는다. 텔레매틱스 단말기의 센서정보를 처리하는 소프트웨어 모듈은 전달받은 센서정보에 대한 처리와 관리를 담당한다. 센서정보의 종류로는 장애정보와 성능정보가 존재한다. 본 발명은 통신게이트웨이를 이용하여 차량의 센서정보를 처리하는 이씨유와 텔레매틱스 단말기간 연결이 별도의 통신모듈 없이 연결되며, 차량 센서정보의 분류와 관리 테이블을 통해 차량의 이상유무에 대한 상태변화를 체계적으로 관리할 수 있다.
Abstract:
An integrated synchronization engine for a telematics terminal and a synchronization method are provided to implement synchronization through a synchronization engine without directly implementing a complicate synchronization process at each application. A synchronization management unit(220) receives internal data managed by an application which is subjected to synchronization within a telematics terminal from the application and synchronization attribute information storing matters to be commonly set for synchronization, and generates log information including a changed matter occurring in the internal data. A synchronization attribute analyzing unit(230) analyzes the synchronization attribute information and sets a communication method to be applied for an application requested for synchronization and a data stored position. A log information analyzing unit(240) checks the changed matter of the internal data from the log information and refers to it for designating synchronization target data.
Abstract:
PURPOSE: A method for obtaining a PVC(Permanent Virtual Connection) path in a network is provided to control a complex PVC connection path setup as an intention of a network operator, if a different type of network shape information passes through an abstraction process only with basic shape information, thereby applicable to different networks. CONSTITUTION: A network confirms whether information on an originating UNI(User Network Interface) port and a receiving UNI port is valid(11), and extracts communication NNI(Network Node Interface) port information from a node where the originating UNI port is included(12). The network performs an abstraction process of the originating and receiving UNI ports(13), and extracts abstract, available/optical paths of an NNI port(14). The network confirms operation states of all ports on a connection setup path(15). If even one port cannot perform connection setup(15), the network restricts an abstracted target to the NNI port(16). If all the ports can perform the setup, the network outputs substantially connectable path information(17).