Abstract:
A domain name apparatus and a method thereof in IP-based wireless sensor network using a new domain naming system are provided to obtain sensor information of a region desired through an internet by using a domain name indicating the kind of a sensor and a geographic location. A sensor node information receiver(110) receives the sensor node information. The sensor node information comprises the location information of a sensor node, the kind of sensing data and IP(Internet Protocol) of the sensor node. A specific local information searching unit(120) searches specific geographical information including an administrative area address corresponding to the location information. A domain name generator(130) produces the domain name of the sensor node and specific geographical information of sensing data. A domain name register(140) binds IP of the sensor node and registers the IP in a domain name server.
Abstract:
A wireless sensor network using the dynamic message transmitting method and a control method thereof are provided to improve the throughput per node and remove the necessity of an MAC(Media Access Control) layer by calculating/updating the message relay probability of each sensor node and dynamically determining a node for relaying a message based on the calculated result. A destination node broadcasts a beacon signal to nodes within a network. A transmission node sends a transmission request message to neighboring nodes to select a relay node for relaying a message, receives response messages from the neighboring nodes which determine a response based on the relay probability, and then selects the relay node based on the response messages. The relay node receives the beacon signal, measures the strength of the beacon signal, and then transmits a response message including information about the strength to the transmission node.
Abstract:
A multi-path routing method is provided a multi-path routing method for selecting appropriate multiple paths when information sensed from a source node is transmitted to a sink node in wireless sensor networks. The source node for transmitting the sensed information first transmits a Hello message to the sink node to identify the existence and position of the sink node. The sink node receives the Hello message and then re-transmits the Hello message with respect to all the received Hello messages. Respective middle nodes accumulate distances between the middle nodes while the Hello message is transmitted to the source node through a reverse path of the Hello message, and all the middle nodes maintain a real distance from the sink node. The source node receiving all the Hello messages can rout a plurality of appropriate paths through Hop-by-hop to the sink node by providing respective weights to an energy remaining amount, an appropriate transmission radius and a real distance from the sink node. Accordingly, priorities can be provided to lifetime of the source node, average energy consumption and the shortest path by adjusting the respective weights when routing the plurality of paths. In addition, appropriate paths can be routed considering the transmission success rate of a path, and a load balancing effect can be obtained using path cost.
Abstract:
A low-power routing method using the time synchronizing method and reservation technique in a wireless sensor network, and an apparatus for performing the same are provided to minimize the power consumption and termination delay of each node in a wireless sensor network environment based on the mesh topology. A low-power routing apparatus comprises a time synchronization and low-power routing execution part(401) which includes a synchronous packet generator(405), a synchronization performing unit(407) and a reservation packet generator(409). The synchronous packet generator produces a synchronization packet for the time synchronization of a network in a preset synchronization region. The synchronization performing unit performs the time synchronization of the network by using the synchronization packet. The reservation packet generator produces a reservation packet for the reservation transmission of data in the network in which the time synchronization is performed. A transceiver(403) transmits and receives the data, synchronization packet and reservation packet according to the control of an upper layer block.
Abstract:
본 발명은 스위칭 빔 형성 장치에 관한 것으로서, 다수의 지향성을 갖는 다수개의 안테나소자와, 다수개의 안테나소자로부터 수신된 신호를 다수개의 독립적인 빔으로 분리하여 출력시키는 스위칭 빔 형성 회로와; 빔 형성 회로를 통과한 신호 중 원하는 신호가 아닌 나머지 N-1개의 경로의 신호를 연결된 저항으로 연결시키는 다수의 스위치와; 스위칭 빔 형성회로에서 출력된 후 스위치와 저항으로 연결되지 않은 하나의 지향된 신호만을 수신하여 로컬오실레이터에서 출력된 신호와 혼합하는 다수의 주파수 변환기와, 하나의 지향된 신호만을 수신하여 복호화하는 복호부 및 기저대역부로 구성되므로, 신호의 격리도를 충분히 높일 수 있으며, 또한, 증폭기는 임피던스 정합 회로로써만 동작하면 되므로, 임피던스의 값이 최대한 유지되도록 하면서, 전력 소모를 줄일 수 있도록 하여 시스템의 효율 및 신호대잡음비가 개선되고, 신호의 격리도 특성이 향상된 효과가 있다. 스위칭, 빔, 버틀러 메트릭스, 안테나,
Abstract:
본 발명은 홈 오토메이션 시스템에서 사용자 개인화 정보에 대응된 홈 오토메이션 주변환경 정보를 이용하여 사용자에게 개인화된 인터페이스 환경을 제공하기 위한 장치 및 그 방법에 관한 것으로, 사용자에 의해 입력되는 사용자 센서정보를 처리하기 위한 센서정보 처리수단; 상기 센서정보 처리수단에 의해 처리된 사용자 센서정보가 기 인증된 사용자의 인증정보인지를 확인하기 위한 사용자 인증 처리수단; 사용자 인증 처리수단에 의해 인증된 사용자의 선호에 따라 홈 오토메이션 시스템을 제어하는 개인화된 정보를 확인하여 처리하기 위한 사용자 개인화 정보 처리수단; 및 사용자에 의해 기 설정된 홈 오토메이션 시스템의 선호 제품 목록을 사용자에게 제공하고, 상기 사용자 개인화 정보 처리수단에 의해 확인된 사용자 개인화 정보에 대응되는 홈 오토메이션 시스템이 지원하는 주변환경에 대한 설정정보를 확인하여 처리하기 위한 주변환경 정보 처리수단을 포함한다. 홈 오토메이션 시스템, 지그비, 사용자 개인화 정보, 주변환경 정보, 사용자 인터페이스 환경
Abstract:
본 발명은 유전체 도파관 대 전송선의 밀리미터파 천이 장치에 관한 것으로, 유전체 도파관과 전송선과 슬롯을 이용한 밀리미터파 천이 구조를 구현하여 저손실로 신호를 천이시킬 수 있는, 유전체 도파관 대 전송선의 밀리미터파 천이 장치를 제공하고자 한다. 이를 위하여, 본 발명은 밀리미터파 천이 장치에 있어서, 최상위 유전체기판 상부에 신호 천이 방향을 따라 입력단과 출력단에 각각 배치되어 신호를 천이시키기 위한 전송선; 최하위 유전체기판의 상하부 접지면과 상기 신호 천이 방향을 따라 배치된 비아열에 의해 형성되어 신호 천이 경로가 되는 유전체 도파관; 및 각 유전체기판의 상부 접지면의 신호 천이 경로 상에 각각 배치되며, 상기 전송선 및 상기 유전체 도파관을 결합시켜, 입력단 전송선으로부터 입력된 신호를 상기 유전체 도파관을 경유하여 출력단 전송선으로 천이시키기 위한 슬롯을 포함한다. 밀리미터파, 천이 구조, 유전체 도파관, 전송선, 슬롯, 매칭패드, 중간 비아, 비아벽
Abstract:
A method for transmitting sensing information in a wireless sensor network having a pair of nodes is provided to determine the fault of a sensor node and a pair node using only sensing information collected by the sensor node and the pair node, which are installed in the same target area to sense information, thereby having no need of additional cost to be economical and efficient. A method for transmitting sensing information in a wireless sensor network comprises the following steps of: setting sensor nodes(301,302) installed in the same target area into a pair of nodes which transceive sensing information each other; allowing one of the sensor nodes set as the pair of nodes to transmit first sensing information(c1), which the sensor nodes sense, to the other sensor node in the pair of nodes; allowing the sensor nodes set as the pair of nodes to transmit the first sensing information and second sensing information(c2) received from the other sensor node in the pair of nodes to a parent node(306); and allowing the parent node to transmit the first and second sensing information to a sink node(308).
Abstract:
A fire alarming and route providing server and a method thereof using a wireless sensor network are provided to offer guide services about an escape route or rescue route to a wire/wireless user terminal by utilizing routing information of the wireless sensor network. A fire alarming and route providing server(130) using a wireless sensor network is composed of a gateway interlocking unit(31) connected to a gateway to collect sensor data related to a fire, from a wireless sensor/control node and routing information of the wireless sensor/control node; a sensor network management unit(32) storing/managing the sensor data and routing information collected through the gateway interlocking unit; a fire monitoring service unit(33) judging whether a fire breaks out or not by analyzing the sensor data read from the sensor network management unit; a fire alarm/fire extinguishing service unit(34) controlling the wireless sensor/control node to alarm or extinguish a fire if the fire monitoring service unit determines that a fire breaks out; and an escape route/rescue route service unit(35) searching an escape route or a rescue route closest to the present position of a user by using the stored sensor data and the routing information if a fire breaks out and transmitting the searched escape route or rescue route to a user terminal.
Abstract:
A method and a system for guiding a visitor using the sensor network are provided to guide the visitor from a starting position to a destination position or from the destination position to the starting position through a visitor terminal by using the sensor network constructed in a building. An entry approver requests entry of a visitor to a terminal(70) of a person to visit according to destination information received from the visitor. A course setting part sets a course for guiding the visitor terminal(10) to the destination position by using the destination information of the visitor according to an approval of the terminal of a person to visit. A location searcher searches and provides a current position of the visitor terminal by using a visitor terminal ID obtained through the sensor network and location information of a sensor node(20) communicating with the visitor terminal. A location checker checks whether the present location of the visitor searched from the location searcher is out of a predetermined range. A door controller enables the visitor terminal to open/close a door installed at the destination position.