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.
Abstract:
A multi-channel operating method in a wireless sensor network is provided to meet the demands that a network transmission performance is high and a data loss is prevented while satisfying requirements of a wireless sensor network operating with low power. A parallel degree is calculated to set a coordinator of each PAN(Personal Area Network). Channel information of each PAN is managed. A beacon frame including superframe schedule information of a main channel and a different channel is generated and transmitted to each node of a corresponding PAN. Data are received by using the superframe schedule information of the different channel(auxiliary channel) during a non-activation interval of the main channel. In managing the channel information, a start time and an end time of the different channel are managed as relative time information based on the schedule of the main channel.
Abstract:
A method for receiving broadcast data using a timer in a personal wireless communication network is provided to be utilized for an application such as a broadcast service of a ubiquitous and low power personal wireless network by minimizing power consumption. A reception node receives broadcast data from a transmission node in a standby state(501,502). The reception node performs decoding and error inspection on the received data(503) to check whether there is an error in the data(504). If the received data has an error, the reception node drives a 'NAK' timer(505). The reception node checks whether the 'NAK' timer has expired(506). If the 'NAK' timer has expired, the reception node transmits a 'NAK' signal to the transmission node(507). If the 'NAK' timer has not expired, the reception node checks whether the same data is received again(509). If the same data is received again from the transmission node, the reception node terminates the 'NAK' timer(510).
Abstract:
An integrated terminal using a DSRC(Dedicated Short Range Communication) scheme and a method for operating the same are provided to collect and distribute traffic image information necessary for drivers by using a high-speed DSRC scheme in receiving necessary traffic image information through an image information receiver. An integrated terminal using a DSRC scheme comprises a short range wireless signal processing part(120) and a central processor(111). The short range wireless signal processing part receives signals from a high-speed short range wireless base station or a low-speed short range wireless base station as the integrated terminal accesses a DSRC zone. The short range wireless signal processing part comprises a high-speed DSRC wireless signal processing part(122) and a low-speed DSRC wireless signal processing part(121). The high-speed DSRC wireless signal processing part processes the data transmitted from the high-speed short range wireless base station. The low-speed DSRC wireless signal processing part processes the data transmitted from the low-speed short range wireless base station. Based on the information contained in a signal received from the short range wireless signal processing part when the integrated terminal enters into the DSRC zone, the central processor controls the high-speed DSRC wireless signal processing part or the low-speed DSRC wireless signal processing part and executes a high-speed or low-speed DSRC service. After checking the communication state of a service which is being executed, the central processor changes the present service into the other, based on a check result.
Abstract:
A feeding apparatus of a satellite communication multi-band antenna having a waveguide structure is provided to efficiently use a limited satellite communication channel by performing a communication with a plurality of satellites using a different frequency band with only one antenna. A feeding apparatus of a satellite communication multi-band antenna having a waveguide structure includes a common port(101), a straight line port(102), a side port(103), a connector(104), a partition(105), a coupling slot(106), and an iris(107). The common port of a circular waveguide shape passes a vertical/horizontal polarized wave signal of a Ku-band, and cuts off a vertical/horizontal polarized signal of an X-band. The straight line port of a spherical waveguide shape passes a vertical polarized signal of the Ku-band, and cuts off the horizontal polarized signal of the Ku-band. The side port passes the horizontal polarized signal of the Ku-band, and cuts off the vertical polarized signal of the Ku-band. The connector connects the common port to the straight line port. The partition cuts off the horizontal polarized signal of the Ku-band to be applied to the straight line port. The coupling slot couples the horizontal polarized signal of the Ku-band of the side port. The iris matches impedance between the coupling slot and the side port.
Abstract:
본 발명은 유전체 도파관을 이용한 대역저지필터에 관한 것으로, 상면 접지면과 하면 접지면 및 비아를 포함하는 유전체 도파관을 이용한 대역저지필터에 있어서, 상기 상면 접지면(또는 하면 접지면) 상에 마련되며, 원하는 대역 저지 주파수에 공진하도록 비아와 기판 수를 이용해 일정 폭과 길이 및 높이를 갖도록 형성된 적어도 하나 이상의 캐비티; 및 상기 유전체 도파관과 상기 캐비티를 연결하기 위해, 상기 유전체 기판과 상기 캐비티 사이에 형성된 적어도 하나 이상의 개구부를 포함한다. 대역, 저지, 필터, 유전체, 도파관, 비아, 캐비티, 개구부, 어퍼쳐