Abstract:
The present invention can generate a communications link between direct communications terminals without a base station and synchronize reference time in the base station or a GSP signal by using a method of transmitting a frame of the direct communications terminal which comprises periodically repeating and transmitting a search frame, a link ID frame, a ranging frame, a data frame, a main synchronization channel, and an auxiliary synchronization channel.
Abstract:
In a wireless communications system, a transmission station transmits or receives data to or from reception stations by using a carrier sense multiple access with collision detection (CSMA/CA) method. The transmission station notifies the time to make the reception stations transmit a response signal for a data frame at the same time when a ready to send (RTS) frame is transmitted to the reception stations. The reception stations transmit the response signal for the data frame to the transmission station at the same time.
Abstract:
A transmission power control device of a wireless access device determines a transmission power value of a wireless access device using a transmission power value of an adjacent wireless access device after extracting the transmission power value of the wireless access device when detecting a control signal of the adjacent wireless access device and transmits a control signal with the determined transmission power value. The transmission power control device of the wireless access device makes balance with a transmission power value with the adjacent wireless access device by controlling the transmission power value of the wireless access device using the transmission power value of the adjacent wireless access device until a control signal of the adjacent access device is detected. [Reference numerals] (810) Receiving unit;(820) Error judging unit;(830) Transmitting electricity extracting unit;(840) Transmitting electricity determining unit;(850) Transmitting unit
Abstract:
본 발명은 무선 통신 단말기의 동작 방법에 관한 것이다. 본 발명의 무선 통신 단말기의 동작 방법은 사용자 인터페이스를 통해 이벤트를 검출하는 단계, 이벤트 검출에 응답하여 무선 통신 채널을 통해 위치 정보를 검출하는 단계, 그리고 검출된 이벤트의 정보 및 검출된 위치 정보를 사용자 인터페이스로 출력하는 단계로 구성된다.
Abstract:
PURPOSE: Ship safety navigation equipment and method are provided to promote a safe navigation by providing a real-time control image to all ships periodically or depending on needs. CONSTITUTION: A ship terminal device(100) is installed. A ship control center terminal device(300) is equipped in a ship control center. A ship terminal device receives a control image and transmits a real-time navigation image to the ship control center terminal device. The ship control center terminal device displays a real-time navigation image through an image display unit and transmits a control image and navigation information to a ship terminal device.
Abstract:
PURPOSE: A tail biting convolution encoding device and a method thereof are provided to execute a tail biting convolution encoding by reflecting a result that an initial preset bit is encoded on the result that information bit sequence is encoded. CONSTITUTION: A buffer(100) stores a bit sequence as much as the initial L bit of the n-number of information bit sequence. An encoder(200) executes an encoding process when data is inputted to the buffer. The encoder stores the convolution-coded encoded bit sequence to a storage part(300) by convolution-encoding the n-number of information bit sequence consisting of inputted data block. The encoder encodes to the final bit of the data block. The encoder successively convolution-encodes the initial L bit saved in the buffer from the first bit. The encoder outputs the bit sequence which is tail biting convolution-encoded by arranging the convolution-encoded bit in the location of firstly encoded bit sequence among encoded bit sequence.
Abstract:
A method and a device for decoding a turbo code are provided to give a weighted value to a systematic bit by comparing a received error data with a LLR(Log Likelihood Ratio) value of the systematic bit of a retransmission data. A transceiving part(110) exchanges a data with a transmitter which transmits the data. The transceiving part exchanges an encoded data by using a turbo code as a channel code. A decoding part(120) decodes the received data by using a turbo decoder. An error checking part(130) checks an error of the data. A memory(140) stores the data. A LLR calculation part(150) calculates a LLR value of a systematic bit of the data. A comparing part(160) compares the LLR value of the systematic bit of the data. A data generating part(170) generates a coupling data.
Abstract:
A method for managing information in a radio communication system is provided to search data information by using burst location information, thereby improving data transmission efficiency. System control information and data information are received from an RLC(Remote Link Control) layer(110) through a logical channel(150). The information is transmitted to a physical layer(130) after the received system control information and data information are mapped on a transmission channel(160). The data information is converted into a burst type of the physical layer. A radio frame recording the system control information and the converted data information is generated.
Abstract:
본 발명은 모듈러(modulo) 3 연산 장치 및 방법에 관한 것으로, 보다 상세하게는 최소의 논리회로로부터 4*M 비트(bit) 이진 정수 N에 대한 모듈러 3 연산을 수행할 수 있는 연산 방법에 관한 것이다. 종래의 모듈러 연산 장치는 두 개의 카운터를 모두 해당 정수만큼 카운트 해야 하므로 입력된 정수 N이 클수록 많은 연산 시간을 소요하게 되는 단점이 있다. 이에 본 발명에서는, 두 번의 AND 연산에 따른 논리회로의 추가로 효율적으로 임의의 정수 N에 대한 모듈러 3의 연산을 수행하여 보다 신속한 모듈러 결과값을 산출할 수 있는 모듈러 3 연산 기술을 마련하고자 한다. 모듈러 3, 속도정합, 3GPP
Abstract:
A mobile communication network structure is provided to perform interfacing between a BS(Base Station) and a BSC(Base Station Controller) using the Internet, thereby minimizing installation cost in establishing more BSs for high-speed data transmission. A mobile communication network structure comprises a mobile terminal(200), a BS(202), an adaptor(204), the Internet(206), a BSC interface(208), and a BSC(210). The BS performs data transceiving with plural mobile terminals within a unit cell are. The BSC is connected to plural BSs to control the operation of the each BS. The adaptor is connected to the BS to convert information transmitted through a Iub interface from the BS into Ethernet packets and transmit converted Ethernet packets through the Internet, convert the Ethernet packets received through the Internet suitable for the Iub interface and provide the converted Ethernet packets to the BS. The BSC interface converts is connected to the adaptor through the Internet to convert the received Ethernet packets suitably for the Iub interface and transmit the converted Ethernet packets to the BSC, convert information transmitted through the Iub interface from the BSC into Ethernet packets and provide the converted Ethernet packets to the BS.