Abstract:
Disclosed is a method for measuring and correcting delay time between a digital unit and multiple radio units. The method for measuring and correcting the delay time according to one embodiment of the present invention measures the delay time between the digital unit and the radio units and corrects the delay time. Thereby, a capacity is increased and performance is improved by equalizing time synchronization between the radio units for cooperative communication. [Reference numerals] (400) Measure delay time by using a clock counter corresponding to each RU; (410) Select a clock counter value with the maximum delay time as reference delay time value by comparing the clock counter values of each RU; (420) Calculate relative delay time value of each RU; (430) Store a data value to be transmitted to each RU from DU in proportion to the relative delay time and transmit the data value; (AA) Start; (BB) End
Abstract:
다중 입력 다중 출력 반복 수신기는, 송신기로부터 출력된 신호로부터 연판정 로그 우도 율 값을 검출한 후 검출한 연판정 로그 우도 율 값으로부터 경판정 값과 연판정 값을 추출하기 위해 디코딩한다. 경판정 값의 순환 중복 검사가 성공적으로 확인되었는지 판단한 후, 판단 결과에 따라 데이터 버스트의 순환 중복 검사 또는 연판정 값을 피드백하여 다중 입력 다중 출력 반복 수신기의 신호 복조 과정의 반복을 결정하거나, 버스트 단위의 신호를 조립하여 데이터에 대한 순환 중복 검사를 수행한다.
Abstract:
PURPOSE: A mesh node synchronization method in a wireless mesh system is provided to modulate a preamble of a neighbor node and broadcasting information. CONSTITUTION: An automatic gain controller transmits a network setup signal received from a neighbor node to a PHY(PHYsical Layer)(S531b). The PHY synchronizes time or frequency by using a preamble of the network setting signal(S532b). The PHY transmits the location information of a starting point of a super frame of the network setting signal to a DSP(Digital Signal Processor). The DSP synchronizes the clock of a mesh node through the location information. [Reference numerals] (AA) Automatic gain control unit; (BB) Power on; (DD) Network setting signal searching time; (EE) Location information transfer of network setting signal/super frame starting point; (S520,CC) Initial network setting mode request; (S531b) Network setting signal/PPA_en signal transfer; (S532b) Time/frequency synchronization network setting signal decoding; (S533b) Super frame starting point correction; (S540,FF) Normal network setting mode request; (S550b) Network entrance
Abstract:
PURPOSE: Even if MS(Mobile Station) receives a map IE(Information Element) which nibble is not arranged, a map analyzing device and a map analyzing method performs map analyzing method in a nibble unit, thereby securing the consumption time of a physical layer by a reduce of map analyzing time. CONSTITUTION: A delay unit(130) outputs lower three bits among four bits forming one nibble as delay bit by a delay. A combination unit(140) generates a plurality of nibble data comprising four bits by combination of delay bit of a current bit and the delay unit of a memory unit(120). A multiplexing unit(150) outputs one from a plurality of nibble data as nibble array map data. A map analyzing unit(160) analyzes the nibble array map data in a nibble unit.
Abstract:
An apparatus for processing a function of a MAC(Media Access Control) layer of an access point(AP) and a method for processing data thereof are provided to reduce time required in processing the function of the MAC layer in a portable internet system, by separately processing the function of the MAC layer in a scheduler and a DSP. In an apparatus for processing a function of a MAC layer of an access point(AP) of a portable internet system, a scheduler(210) schedules uplink and downlink, and generates an MAC PDU(MAC Protocol Data Unit) of downlink data to be transmitted to a terminal(100), and assembles an MAC PDU of uplink data transmitted from the terminal. A DSP(Digital Signal Processor)(220) processes the MAC PDU generated from the scheduler and then transmits the processed MAC PDU to the terminal, and processes the uplink MAC PDU transmitted from the terminal and then transfers the processed uplink MAC PDU to the scheduler.
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 device for interfacing an RNC(Radio Network Controller) of a base station in a wireless communication system is provided to supply a physical communication path between the base station and the RNC, and to transmit control information through an HDLC protocol communication path as a duplexing control channel, thereby supporting multimedia and subscriber roaming services. CONSTITUTION: A router interface module(321) performs a router interface within a base station transceiver(31). An AAL2/5 form conversion module(322) converts AAL2-type ATM traffic into AAL5-type ATM traffic while processing voice and image traffic, and converts the AAL5-type ATM traffic into the AAL2-type ATM traffic, and bypasses the AAL5-type ATM traffic. A line interface module(326) interfaces with an RNC(40). An HDLC module(323) transmits control information to a base station control processor when a failure is generated. A CPU module(324) checks and operates each module state of an RNC interface(32), and switches a channel. An SAR module(325) disassembles and assembles AAL5 frames. A clock module(327) inputs a network synchronous clock, transmits a reference clock to a CKGD(Clock Generation amp; Distribution) unit(33), receives the reference clock, and synchronizes links between the RNC(40) and a base station.
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:
본 발명에 따른 데이터 송신 장치는, 적어도 하나의 파일럿 심볼이 삽입된 복수의 부반송파 중에서 선택된 하나 이상의 부반송파를 포함하는 복수의 그룹에 대한 IFFT를 각각 수행하여 복수의 OFDM 심볼을 출력하는 복수의 IFFT부; 상기 복수의 OFDM 심볼의 PAPR을 각각 측정하는 PAPR 측정부; 및 상기 복수의 부반송파 중에서 상기 하나 이상의 부반송파를 선택하고, 상기 측정된 복수의 OFDM 심볼의 PAPR을 미리 설정된 설정값과 비교하고, 상기 비교 결과를 근거로 상기 복수의 OFDM 심볼의 출력 여부를 결정하는 부반송파 선택부;를 포함한다.