Abstract:
본 발명은 무선 통신 시스템에서 기준 신호를 송신하기 위한 장치 및 방법과 그 시스템에 관한 것으로, 특히 다중입력 다중출력(Multiple Input Multiple Output, MIMO) 방식을 사용하는 무선 통신 시스템에서 기준 신호를 송신하기 위한 장치 및 방법과 그 시스템에 관한 것이다. 본 발명의 일 실시 예에 따른 방법은, 다중입력 다중출력 방식을 사용하는 무선 통신 시스템의 송신 장치에서 기준신호 송신하기 위한 방법으로, 하나 이상의 안테나 소자로 구성된 둘 이상의 포트들 각각에 대하여 송신할 상기 기준신호의 전송 횟수를 각 포트에 포함된 안테나 소자의 수로 결정하는 단계; 상기 기준신호를 전송 횟수만큼 송신하기 위해 상기 전송 횟수만큼 순환적으로 서로 다른 송신 패턴들을 생성하는 단계; 및 상기 생성된 각 패턴들에 따라 상기 기준 신호를 적어도 하나의 상기 안테나 소자로 매핑하여 순차적으로 송신하는 단계;를 포함할 수 있다.
Abstract:
본 발명은 파장 분할 병렬 가시광 통신 시스템에서의 2차원 프레임 번호를 이용한 데이터 통신 방법에 있어서, 송신기에서 수행되는 각 과정은, 송신측의 전송하고자 하는 데이터를 복수개의 데이터 프레임으로 분할하고, 상기 분할된 각 프레임 내 해당 서브(sub) 프레임에 순차적으로 일련번호를 부여하는 과정과, 상기 가시광에 의해서 발생된 상이한 복수개의 파장에 파장 별 식별번호를 부여하는 과정과, 상기 부여된 프레임 내 일련번호 및 파장 별 식별번호를 이용하여 데이터 전송 시 각 프레임의 전송을 담당할 각 파장의 해당 식별번호와 프레임 내 서브 프레임 일련번호가 조합된 2차원 프레임 번호를 생성하여 이를 수신측으로 순차적으로 전송하는 과정을 포함함을 특징으로 한다. 가시광 통신, LCD, 데이터 프레임
Abstract:
PURPOSE: An apparatus for transmitting optical information and an apparatus for receiving optical information are provided to transmit relatively large amount of data directly, by using the optical information transmission apparatus as an alternative about an information symbol like a quick response (QR) code. CONSTITUTION: At least three light emitting diodes (21) of an optical information transmitting apparatus are installed with a predetermined interval and direction. A data transmission part (23) of the optical information transmitting apparatus transmits data, by controlling the three light emitting diodes (LED) on the basis of visible light communication (VLC) protocol. A first light emitting diode (21-1) generates and transmits a physical (PHY) header including an LED identifier, distance information and a group identifier. A second light emitting diode (21-2) and a third light emitting diode (21-3) generate and transmit a PHY header the LED identifier and the distance information. [Reference numerals] (21-1) Light emitting element 1; (21-2) Light emitting element 2; (21-3) Light emitting element 3; (23) Data transmitting unit
Abstract:
PURPOSE: A proxy communication system in body area environment is provided to wirelessly transmit and receive data between a coordinator and a sensor. CONSTITUTION: A control unit corresponds to a request data, and controls a first communication unit in order to transmit a proxy right. A communication unit(851) receives the proxy right. A control unit(852) generates a user identifier corresponding to the user. The control unit searches for one or more sensors used by a sensor. The control unit controls the communication unit in order to form a pairing and the detect sensor. [Reference numerals] (810,853,863) Storage unit; (820,852,862) Control unit; (841) First communication unit; (842) Second communication unit; (843) n-th communication unit; (865) Sensor unit; (S30,854,864) Display unit; (S40,851,861) Communication unit
Abstract:
PURPOSE: A position correction apparatus using visible light communication and a method thereof are provided to perform position correction by using visible light communication in order to provide the position of a terminal accurately. CONSTITUTION: A transceiver(220) receives a visible light signal including illumination position information from a lighting device. A position correction part(240) calculates corrected position of a position correction apparatus using the received visible light signal. A control part(210) extracts the illumination position information from the visible light signal when the visible light signal is received from the transceiver, and controls the position correction part to calculate the corrected position of the position correction apparatus according to the position correction request. [Reference numerals] (210) Control part; (220) Transceiver; (230) Sensor part; (240) Position correction part; (250) Memory part; (260) Display part
Abstract:
PURPOSE: A device for allocating resources in a visible ray communication system and a method thereof are provided to efficiently allocate resources to at least one visible ray communication terminal. CONSTITUTION: A controller(552) receives an initial access request from a visible ray communication terminal through a light source. The controller determines whether there are resources to be allocated to the visible ray communication terminal. When there are not resources to be allocated to the visible ray communication terminal, the controller collects allocated resources from a visible ray communication terminal which belongs to a light source service area. The controller transmits the information for the collected resources to the initially accessed visible ray communication terminal.
Abstract:
무선 충전 방법에 있어서, 적어도 하나 이상의 충전 가능한 전자기기를 탐색하는 단계; 상기 탐색된 적어도 하나 이상의 전자기기로부터 전력 서비스 정보를 수신하는 단계; 상기 수신된 전력 서비스 정보에 기초하여 충전 가능 여부를 판단하는 단계; 및 상기 전자기기로부터 전력을 공급받는 단계를 포함함을 특징으로 한다.
Abstract:
PURPOSE: A channel allocating method of visible light communication system and a device thereof are provided to supply a various services per user if a visible communication service is provided by using a neighboring plurality of light source. CONSTITUTION: A control unit(112) transmits an initial connection request including a available wavelength channel information to a base station through a light emitting element by using a basic time slot channel and a basic wave channel. The control unit receives channel allocation information through a photosensitive element from a base station. The control unit transceives data with a base station by using an allocated wave channel included in the channel allocation information to an allocation time slot included in the channel allocating information when transceiving data.
Abstract:
PURPOSE: An apparatus and a method for acquisitioning symbol synchronization in a non-coherent asynchronous receiver are provided to reduce the current consumption of an integral calculation by acquiring the symbol synchronization using few integrators. CONSTITUTION: A first integrator(505a) acquires a first energy value by integrating signal which is received at a first point of a modulation symbol column during one symbol period. A second integrator(505b) acquires a second energy value by integrating signal which is received at a second point of a modulation symbol column during one symbol period. A detector(207) acquires symbol synchronization considering the first energy value and the second energy value.
Abstract:
A data transmission device in a wireless visible light communication system and a method thereof are provided to distribute data rates according to SNRs(Signal to Noise Ratios) of each wavelength as controlling power ratios of each wavelength, thereby supporting maximum data rates. A pilot signal is transmitted to a receiver from a transmitter(601). The receiver transmits a pilot response signal to the transmitter(603). The transmitter controls a data rate according to the pilot response signal(605). The transmitter loads information about the data rate on a header, and transmits data(607). The receiver controls the data rate according to each channel by referring to the data rate information of header information. The pilot signal is transmitted to the receiver from the transmitter in order to find out state information of each channel.