Abstract:
PURPOSE: A variable FFT device is provided to use FFT hardware engine, thereby supporting multiple size and multi-output. CONSTITUTION: A 4N point radix-2 butterfly(400) computes butterfly about an output of 2N point radix -2 butterfly unit. An output order assigning unit(500) is inputted an output computed from 4N point radix -2 butterfly. The output order assigning unit arranges an output order. A multiplexer(700) selects one among a N point rotation factor, 2N point rotation factor and 4N point rotation factor according to a output point size.
Abstract:
본 발명은 이동통신시스템의 상향링크 고속 레인징 처리 장치 및 그 방법에 관한 것이다. 본 발명에 따르면, 상향링크 고속 레인징 처리 장치가 FFT 사이즈의 1/2 포인터 떨어진 위치에 같은 값을 가지는 두 쌍의 레인징 코드를 송신한다. 상향링크 고속 레인징 처리 장치는 수신한 두 쌍의 레인징 코드를 이용하여 상관값을 구한다. 그리고 상관값을 이용하여 시간지연에 해당하는 복수지수 항을 제거하기 위한 복수지수 회전인자 탐색 순서를 결정한다. 따라서, 시간 오차에 해당하는 복수지수 회전인자의 반주기 대칭성을 이용하여 종래의 복수지수 회전인자 탐색 방법에 비해 각 단말기의 시간 오차를 탐색하는 데 걸리는 시간을 줄일 수 있다. 상향링크 고속 레인징, 시간지연, 복수지수 회전인자
Abstract:
A method and an apparatus for an uplink fast ranging in a mobile communication system are provided to decrease a detection time of a time delay error in respective terminals by using a half periodic symmetry of the time delay error in a base station. An uplink fast ranging apparatus includes a range code generator(110), a ranging code duplicating unit(120), and an IFFT(Inverse Fast Fourier Transform) unit(130). The range code generator generates a ranging code. The ranging code duplicating portion duplicates the ranging code, so that different pointer units are allocated to the ranging codes. The IFFT unit performs an IFFT on the generated ranging code and the duplicated ranging code and outputs a ranging code pair.
Abstract:
본 발명은, 다수의 가입자가 가입자에 따른 요구에 맞도록 고속 데이터 전송이 가능한 무선인터넷시스템의 MAC계층 구성장치를 제공한다. 본 발명의 하나의 특징에 따른 MAC계층 구성장치는 무선 인터넷 시스템에서 상위 계층과 물리계층 사이의 MAC 계층을 구성하는 장치이다. MAC계층 구성장치는 빠른응답기능, 블록반복기능블록, 시간조정기능블록 및 관리기능블록을 포함한다. 빠른응답기능블록은 상위 계층과 인터페이스되고, 상위 계층으로부터 전달된 제어 메시지에 기초하여 프레임 데이터를 물리계층에서 필요한 정보로 변환시켜 준다. 반복기능블록은 프레임 데이터에 대한 오류 정정 코드의 삽입 및 확인을 수행하며, 송수신된 프레임 데이터에 대해 암호화 및 복호화를 수행한다. 시간조정기능블록은 물리계층과 인터페이스되고, 물리계층과 동기를 맞추어 물리계층이 요구하는 시점에 프레임 데이터와 제어 메시지를 전송한다. 관리기능블록은 상위 계층과 인터페이스되며, 빠른응답기능블록, 반복기능블록 및 시간조정기능블록의 상태를 관찰하고 이상 상태에 대한 정보를 취합하여 상위 계층에 전달한다. MAC, 무선인터넷, 상향링크, 하향링크
Abstract:
A device and a method for fast Fourier transform are provided to offer a simple binary reverse output order and reduce complexity while minimizing the number of hardware elements by having a structure formed with only the adders without any multiplier, as a mixed radix 4-2 butterfly structure is used. The first radix-4 butterfly operation module(110) generates the first output data according to the simple binary reverse output order by performing the radix-4 butterfly operation after decomposing input and output data according to an index decomposition method. The first radix-2 butterfly operation module(120) generates the second output data according to the simple binary reverse output order by performing the radix-2 butterfly operation with the first output data according to the index decomposition method.
Abstract:
본 발명은 버스트 모드 직교주파수 분할 다중화(OFDM)/시분할 다중화(TDD) 이동통신 시스템에서 부채널 그룹에 대한 변조 및 코딩 방식(MCS)에 대한 정보 송신 및 수신 방법 및 그 장치 관한 것이다. 본 발명에서 MCS 레벨 정보를 송신하는 방법은, 버스트에 대응하는 부채널 그룹에 대응하는 채널 정보를 수신하는 단계; 상기 채널정보에 대응하는 MCS 정보를 결정하여 MCS 레벨 코딩부가 상기 부채널 그룹에 대한 상기 MCS 정보를 기설정된 복수의 코드 중 하나와 매핑시키는 단계; 상기 MCS 레벨 코딩부 내의 월시-아다마르(WH) 코드 생성부가 상기 매핑된 MCS 레벨 코드와 대응하는 상기 부채널 그룹 내의 부채널에 대한 WH 코드를 생성하는 단계; 상기 생성된 WH 코드를 이용하여 부채널 그룹의 미리 알려진 패턴 데이터(Known pattern)를 가공하는 단계; 및 e) 상기 부채널 그룹에 속하는 부채널에 상기 가공된 패턴 데이터 신호를 매핑한 후, 하나의 프리앰블 심볼에 포함시켜 송신하는 단계를 포함한다. 따라서, 적응형 변조/코드 방식에 대한 정보를 전달하기 위해 하나의 프리앰블을 이용함으로써 별도의 제어 채널을 절감할 수 있다. 변조/코드 방식, MCS, 적응형 변조, 프리앰블, OFDM, TDD
Abstract:
PURPOSE: A base station device of an advanced mobile communication system is provided to supply a multimedia service having high transmission speed from a low voice speed in the advanced mobile communication system, and to supply a global roaming service, thereby giving a multimedia communication service without restrictions. CONSTITUTION: An RFS(Radio Frequency Subsystem)(210) performs upward/downward converting functions of RF/IF signals of a base station device. A BBS(Base Band Subsystem)(220) performs a base band modulation/demodulation signal process for a signal transmitted from the RFS(210) and a signal transmitted from a BIS(Base station Interconnection Subsystem)(230). The BIS(230) interfaces with a call processing, operation and maintenance, and an RNC(300) of the base station device. The BIS(230) performs a receiving space diversity function having two independent paths, a transmission space diversity function having two independent paths, and a function of remotely controlling, reporting, and controlling with a port for monitoring an RF signal.
Abstract:
PURPOSE: A scheduling method for processing traffic of multi calls in a wireless communication base station channel card is provided to select one of 8 time segments, and to distribute load of traffic processing, then to efficiently treat traffic processing of the multi calls, thereby efficiently managing the traffic processing as satisfying a 3GPP standard. CONSTITUTION: A scheduling system checks whether an active call exists in an FP DL(Frame Protocol Down Link) database(501). If so, the system brings a frame offset, a chip offset, and a value of a TTI(Transmission Timing Interval) from the call(502). If the chip offset is bigger than one time segment(503), the system sets a frame position to '1'(504). If the chip offset is smaller than one time segment, the system sets the frame position to '0'(505). The system compares a value of a current CEP(Channel Element Processor) is the same as '0'(506). If so, the system decides whether another value is the same as a current time segment value(507). If so, the system processes traffic data with an exclusive channel of the call, and transmits the data to an MDSP(Modulation Digital Signal Processor)(508).
Abstract:
PURPOSE: A base station device of an advanced mobile communication system is provided to supply a multimedia service having high transmission speed from a low voice speed in the advanced mobile communication system, and to supply a global roaming service, thereby giving a multimedia communication service without restrictions. CONSTITUTION: An RFS(Radio Frequency Subsystem)(210) performs upward/downward converting functions of RF/IF signals of a base station device. A BBS(Base Band Subsystem)(220) performs a base band modulation/demodulation signal process for a signal transmitted from the RFS(210) and a signal transmitted from a BIS(Base station Interconnection Subsystem)(230). The BIS(230) interfaces with a call processing, operation and maintenance, and an RNC(300) of the base station device. The BIS(230) performs a receiving space diversity function having two independent paths, a transmission space diversity function having two independent paths, and a function of remotely controlling, reporting, and controlling with a port for monitoring an RF signal.
Abstract:
PURPOSE: A method for managing a buffer for transport channel synchronization in a wireless communication system is provided to effective manage data coming within a process-available time window while processing traffic data. CONSTITUTION: It is checked how many buffers are turned on(401). It is checked whether the number of buffers is greater than 0(402). If the number of buffers is greater than 0, it is checked whether one buffer data with a flag ON comes within a window time(403). If one buffer data has come within the window time, the data is transferred to an MDSP(Modulator Digital Signal Processor) and the flog of the corresponding buffer is turned off(404). If one buffer data has not come within the window time, it is checked whether it has come later than a predetermined window time(405). If one buffer data has come later than the predetermined window time, the data is discarded and a flag is turned off(406). If one buffer data has come ahead of the predetermined window time, the data is stored in a corresponding buffer and a flag is maintained in an ON state(407). It is checked whether a value obtained by reducing one buffer is greater than 0(408). It is checked whether there exist data(409). If there is data, it is checked whether the data has come within the pre-set window time(410). If the data has come within the window time, the data is transferred to the MDSP(411). If the data has not come within the window time, a TA(Timing Adjustment) message is transferred to a traffic processor(412). It is checked whether certain data comes later than the pre-set window time(413). If the data has come later than the pre-set window time, the data is discarded(414). If the data has come ahead of the window time, the data is stored in an empty buffer and a flag is maintained to be ON(415).