Abstract:
A sync node integrated gateway apparatus and a method for transferring data in the apparatus are provided to remove a bottleneck of data transfer through UART(Universal Asynchronous Receiver Transmitter) matching from the sync node to the gateway when data sensed from sensor nodes inside a sensor network are concentrated on a sync node. A transceiver(310) transmits and receives an RF(Radio Frequency) signal with a sensor network(305). The first matching unit(320) transmits and receives data through the transceiver and a serial peripheral device interface. The second matching unit(330) transceives data according to an IP(Internet Protocol). The first matching unit and the second matching unit transmit data of each other through each internal process.
Abstract:
A method and an apparatus for guiding traffic information is provided to secure traffic information without an additional facility by supplying the traffic information in real time through a visible and audible device such as a navigation system. A traffic information production unit(110) generates traffic information including vehicle speed information at each section. A transmission unit(120) transmits the traffic information to a vehicle in section where wireless communication is available and traffic information collection device. A receiving unit(130) collects the traffic information from the vehicle and the traffic information collection device.
Abstract:
An apparatus for connecting heterogeneous networks in a sensor network and a method thereof are provided to increase the energy efficiency and data transmission efficiency of the sensor network by making nodes of the sensor network operate nodes of an external network as if they communicate with nodes of a different PAN. A virtual PAN(Personal Area Network) address generator(300) assigns a virtual PAN address to an external network node. A PAN header generator(310) produces a PAN header including the virtual PAN address. An address mapping table(330) stores the actual address of the external network node which is mapped to the virtual PAN address. A virtual PAN address inquiring unit(340) is the actual address of the external network node within the address mapping table. An IP header generator(350) generates an IP header including the actual address of the external network node.
Abstract:
무선 센서 네트워크에서 IPv6를 적용하기 위한 코디네이터, 게이트웨이 및 방법이 개시된다. 무선 센서 네트워크에서 이용되는 쇼트 어드레스를 이용한 링크 로컬 어드레스 및 노드의 EUI를 이용한 글로벌 유니캐스트 어드레스의 듀얼 어드레싱을 통하여 무선 센서 네트워크의 이동성을 지원하고 외부 네트워크와의 통신을 가능하게 한다. 무선 센서 네트워크, IPv6
Abstract:
비컨 모드로 동작하는 무선 센서 네트워크에 있어서 비컨을 전송하기 위한 타임 슬롯을 할당하는 방법 및 장치에 관한 발명이 개시된다. 본 발명에 따른 타임 슬롯 할당 방법 및 장치는 네트워크에 할당된 총 타임 슬롯들을 N개의 블록들로 분할하고 특정 노드가 무선으로 직접 전송할 수 있는 노드들 중 독점적으로 타임 슬롯을 할당받은 노드를 부모 노드로 선택하며, 부모 노드를 중심으로 네트워크를 2 이상의 영역으로 나누고, N개의 블록들 중 부모 노드에 할당된 타임 슬롯이 속하는 블록과 인접한 블록들을 상기 영역들에 각각 할당하며, 나누어진 영역들 중 특정 노드가 속하는 영역에 할당된 블록에 속하는 타임 슬롯들 중에서 아직 할당되지 않은 타임 슬롯을 상기 특정 노드의 타임 슬롯으로 할당하는 것을 특징으로 한다. 무선 센서 네트워크, 타임 슬롯
Abstract:
본 발명은 원격으로 노드의 소프트웨어를 관리하기 위한 유비쿼터스 센서 네트워크 시스템 및 그 방법에 관한 것으로, 유비쿼터스 센서 네트워크(USN)에서 노드들에게 새로운 소프트웨어의 ROM 파일을 원격으로 제공하고 부가적으로 노드들의 전원을 그룹별로 관리함으로써, 노드들을 직접 수거하여 소프트웨어를 직접 다운로딩시키는 번거로움을 해소시키기 위한, 원격으로 노드의 소프트웨어를 관리하기 위한 유비쿼터스 센서 네트워크 시스템 및 그 방법을 제공하고자 한다. 이를 위하여, 본 발명은 유비쿼터스 센서 네트워크 시스템에서 노드의 소프트웨어 ROM(Read Only Memory) 파일 다운로딩 방법에 있어서, 각 노드가 다운로딩용 리셋(reset) 명령어를 수신함에 따라 자신의 플래시 메모리(Flash Memory)에 다운로딩을 위한 플래그(flag)를 설정하고 자신을 리셋시키는 단계; 상기 각 노드는 관리 노드로부터 소프트웨어의 ROM 파일을 다운로딩하는 단계; 및 상기 각 노드는 상기 자신의 플래시 메모리에 정상 상태로 동작하기 위한 플래그(flag)를 설정하고 자신을 리셋시키는 단계를 포함한다. USN 시스템, RF 다운로드, 관리 노드, 관리 서버, ROM 파일
Abstract:
A mixer for converting single signal into differential signal and a transceiver including the same are provided to improve LO(Local Oscillation) frequency removing property by using different local oscillation frequency in a transceiver. A LO differential signal generating part(21) converts an input LO signal into a differential signal. A first input is an LO differential signal. A second input is a first signal having a first frequency. A mixing part(22) differentially amplifies the LO differential signal and the first signal, and outputs a second signal of a second frequency by amplifying. The input LO signal has a frequency of LO or LO/2.
Abstract:
An MAC method based on TDMA, and a recording medium recording data for an MAC frame structure are provided to enable a sink node to allocate the slot of each sensor node on the basis of the TDMA in the whole frame structure, thereby configuring a ubiquitous sensor network considering low power and real-time characteristics. An MAC(Media Access Control) method based on TDMA(Time Division Multiple Access) comprises the following steps of: initializing a sensor node(S401); receiving a beacon from a sink node and processing the received beacon(S402); acquiring media access randomly in a requested slot section and requesting the sink node to allocate slots(S403); checking whether the slot request succeeds from next beacon information(S404); transmitting data in an allocated slot section if the slots are allocated(S405); and checking whether the transmission of the data succeeds(S406).
Abstract:
An apparatus for providing an interface environment according to user personalized information in a home automation system, and a method therefor are provided to authenticate a user, check the personalized information of the authenticated user, check setting information for a surrounding environment, and control the surrounding environment according to the setting information, thereby constructing a user-oriented service environment. An apparatus(300) for providing an interface environment according to user personalized information in a home automation system comprises a sensor information processing unit(301), a user authentication processing unit(302), a user personalized information processing unit(303), a surrounding environment information processing unit(304), and a program update processing unit(305). The sensor information processing unit processes user sensor information inputted by a user. The user authentication processing unit checks whether user sensor information processed by the sensor information processing unit is the authentication information of a pre-authenticated user. The user personalized information processing unit checks and processes personalized information for controlling the home automation system according to the preference of the user authenticated by the user authentication processing unit. The surrounding environment information processing unit checks and processes setting information about a surrounding environment which the home automation system supports in correspondence to the user personalized information checked by the user personalized information processing unit. The program update processing unit updates a driving program transferred from the outside.
Abstract:
An omni-directional planar antenna is provided to facilitate integration with an integrated circuit and implementation in a silicon semiconductor device. An omni-directional planar antenna includes a circular patch(102), a planar transmission line, a signal via, and a metal ground plane. The circular patch is located on any one of a plurality of dielectric substrates(101). The planar transmission line receives an external signal. The signal via connects the circular patch and the planar transmission line to feed the external signal received through the planar transmission line to the circular patch. The metal ground plane is located on the dielectric substrate and has a slot to pass the signal via.