Abstract:
PURPOSE: A visible light wireless communication method using inverted signals and a device for the same are provided to be applied to communication between vehicles having high external noises and far communication distances using both lamps of a vehicle as two conductive wires in a differential signal mode. CONSTITUTION: A pulse width modulation (PWM) section determination unit (1320) determines the length of an additional PWM section based on brightness information corresponding to headlight, tail light, and brake light from a bright information providing unit (1390) corresponding to a central control unit of a vehicle. A left signal transmission unit (1330) and a right signal transmission unit (1340) generate a transmission signal which is generated by synthesizing a data signal and a PWM signal based on a received data signal and PWM section length information received from the PWM section determination unit. The generated transmission signal is transmitted from a left LED emitting unit (1360) and a right LED emitting unit (1370) according to a signal from a transmission timing determination unit (1350) in order to prevent a transmission timing error. [Reference numerals] (1310) Inverse data signal generation unit; (1320) PWM section determination unit; (1330) Left signal transmission unit; (1340) Right signal transmission unit; (1350) Transmission timing determination unit; (1360) Left LED emitting unit; (1370) Right LED emitting unit; (1380) Transmission data providing unit; (1390) Bright information providing unit; (AA) Data section length calculation unit; (BB) Data section brightness calculation unit; (CC) PWM section length calculation unit; (DD,FF) Data and PWM signal synthesizing unit; (EE,GG) Data and PWM signal transmission unit
Abstract:
PURPOSE: A packet processing apparatus for an MPLS(Multi-Protocol Label Switching)-TP(Transport Profile) network and method thereof are provided to respectively execute service packet processing processes by managing a service by using data link layer information. CONSTITUTION: A packet processing apparatus acquire LSP(Label Switched Path) condition information(203). The packet processing apparatus acquires forwarding information and header information(204). When the SLSP(Service LSP) lable information of the forwarding information is matched with the SLSP information stored in a hash table, the packet processing apparatus determines the created service type or a temporary type(206,208). The required bandwidth of the determined service type is over the preestablished threshold values, the packet processing apparatus transmits the reception packet through an MPLS-TP(Multiprotocol Label Switching-Transport Profile) label encapsulation and the header update of the reception packet.
Abstract:
PURPOSE: An illumination correction method and an apparatus using the same are provided to maintain quality of light by automatically compensating a changed amount of LED light according to time and a surrounding environment with respect to a reference value of initial LED light. CONSTITUTION: A lighting unit(13) comprises an RGB LED and a white LED. The white LED includes warm/cool white LEDs. A single illumination LED is formed with the RGB LED and the white LED. The lighting unit comprises a plurality of the illumination LEDs. An illumination sensor detects light emitted from the lighting unit. The illumination sensor is located on a diffusion plate for being corresponded to a direction of the light emitted from the lighting unit. The light emitted from the lighting unit is detected by the illumination sensor. The illumination sensor accurately measures the light using the diffusion plate.
Abstract:
PURPOSE: A transmission device using visible ray wireless communication and a method thereof are provided to express various colors without changing a voltage applied to red, green, and blue LED light sources. CONSTITUTION: A color generating unit receives a color index and a brightness index(S1110). The color generating unit determines a color which occupies the highest rate among red, green, and blue to express a corresponding color(S1120). The color generating unit determines a pattern index of a corresponding LED(Light Emitting Diode)(S1130). The color generating unit determines a pattern index of an LED which emits the other colors(S1140). If a pattern index value is valid, a pattern generating unit generates a light source driving signal(S1150,S1160).
Abstract:
PURPOSE: A data communication device using visible light wireless communication and a method thereof are provided to determine interval time of data transmission, thereby performing dimming without encoding/decoding of a transceiving device. CONSTITUTION: A light output setting unit(442) sets the width of a pulse outputted from a light output signal based on receiving device moving speed and dimming information. A message processing unit(444) encodes inputted message data. The message processing unit merges the encoded message data with a light output signal outputted from the light output setting unit. A control signal generating unit(448) sets the cycle of transmitting a light output signal from the message processing unit based on the receiving device moving speed to generate a light output control signal.
Abstract:
PURPOSE: A packet-optical integrated transporting apparatus is provided to integrate multiple transfer network structure into a single transfer network structure. CONSTITUTION: A packet transmitting unit(100) outputs multiplexed line traffic to a preset channel. An optical transmitting unit(200) multiplexes the single transfer network structure into a multichannel wavelength signal. The optical transmitting unit unites or divides the multiplexed multichannel wavelength signal to a node. A system control unit(300) transfers configuration element initialization information to the packet transmitting unit and the optical transmitting unit.
Abstract:
PURPOSE: A visual light wireless communication method and a device for the same are provided to minimize the brightness reduction of a visual light source or a light device which is generated by a code for a communication and a demodulation function. CONSTITUTION: A coding and modulating unit(120) code and modulates each bit of a code which will transmits the code by at least one between a first modulating signal and a second modulating signal. The first modulating signal is for enabling light during a unit time in continuous on state. A second modulating signal is for generating the off/on of light within the unit time or generating on/off modification. A visible light source driving unit(130) drives the light by using a first modulating signal or a second modulating signal. The visible light source driving unit performs visible light wireless communication through the light.
Abstract:
PURPOSE: A visible light wireless communication system by using multi carrier and a method thereof are provided to use multi carrier technique capable of higher order modulation, thereby overcoming the limit of the transmission speed on existing strength modulation method in a VLC(Visible Light Communications). CONSTITUTION: A modulator unit(110) performs the symbol-mapping of transmission data. The modulator unit modulates symbols into parallel data. The modulator unit performs IFFT(Inverse Fast Fourier Transform) of the modulated data. The modulator unit divides the IFFT result value into the real number data and imaginary number data. A DAC(Digital Analog Converter) unit(130) respectively converts the real number data and imaginary number data into analog signal. A transmitting unit(150) transmits the converted real number data and imaginary number data by the visible ray.
Abstract:
본 발명은 가변 비트율 음성 코덱의 제어 방법 및 그 장치를 개시한다. 본 발명에 따른 가변 비트율 음성 코덱 제어 방법은 신규 호 설정을 요청하는 단말들의 통화 능력을 추출하는 단계와, 교환 패킷을 통해 현재 설정된 기존 호들로부터 네트워크 파라미터를 추출하는 단계와, 상기 추출된 네트워크 파라미터를 기초로 상기 기존 호들의 음성 품질을 측정하는 단계와, 상기 측정된 음성 품질 및 상기 통화 능력을 바탕으로 신규 호 승인 여부를 결정하는 단계;를 포함할 수 있다. 따라서 네트워크의 전달 능력에 따라 가변 비트율 코덱의 전송률을 조정하여 단말 간 음성 서비스의 QoS를 보장할 수 있다. G.729.1, VoIP, 가변 비트율 음성 코덱, QoS, 음성 코덱 제어 장치
Abstract:
An Ethernet-based stand-alone type network security system is provided to enable a manager to easily manage a system by mounting a storage unit for storing a huge amount of log information for system monitoring. A control processing unit(200) controls an operation of an overall system and manages a state of the system. A network processing unit(300) performs a traffic management function by interworking with the control processing unit, and outputs switching/routing path information obtained by performing the traffic management function to a corresponding line interface or a monitor interface, or perform a reverse function. An Ethernet physical layer unit(400) includes a line interface connected with an external network and a monitor interface(741) connected with the control processing unit, restores a line interface signal or a monitor interface signal to a physical layer signal, and transfers the restored signal to the network processing unit, or performs a reverse function. A storage unit(500) receives log information for system monitoring from the control processing unit, and stores the same.