Abstract:
A RS apparatus for transmitting broadcast information received from a BS(Base Station) to a UE periodically in an MMR(Multihop Mobile Relay) system, and a transmission method therefore are provided to schedule broadcast information so as for the broadcast information to be transmitted to terminals within the RS according to the time intervals of the broadcast information transmitted by an MMR-BS, thereby using radio resources between the MMR-BS and a RS efficiently. A RS(Relay Station) apparatus(200) comprises a receiving unit(201), a scheduling unit(202), and a transmitting unit(203). The receiving unit receives a message including broadcast information to be transmitted to a UE(User Equipment), and stores/updates the broadcast information in the received message. The scheduling unit determines broadcast information to be included into a downlink frame on the basis of predetermined time intervals for the each broadcast information in the stored or updated broadcast information. The transmitting unit transmits the determined broadcast information to the UE within the RS using the downlink frame.
Abstract:
OFDMA(Orthogonal Frequency Division Multiple Access)/TDD(Time Division Duplex) 통신 시스템에서, 각 사용자 단말로부터 부채널 상태 정보를 수집하고, 이 수집한 정보를 이용하여 각 사용자 단말의 부채널 상태 예측 파라미터 값을 계산한다. 그리고 계산된 부채널 상태 예측 파라미터 값을 이용하여 각 사용자 단말에게 할당된 부채널에 추가 전력을 할당할 것인지 추가 부채널을 할당할 것인지를 결정한다. 이와 같이 각 사용자 단말의 부채널 상태 정보를 이용함으로써 각 사용자 단말에게 효과적으로 추가 전력 및 추가 부채널을 할당할 수 있다. OFDMA/TDD, 부채널, 전력, 할당, 채널 상태, 파라미터, 전송 비트
Abstract:
An apparatus and a method for encrypting a mobile Internet system, and an apparatus and a method for decrypting the mobile Internet system are provided to improve encryption and decryption performance of the system by differently setting encryption and decryption modes according to a service of the mobile Internet system. An apparatus for encrypting a mobile Internet system includes an encryption input selection unit(110), first and second encryption units(120,130), and an encryption output selection unit(140). The encryption input selection unit(110) selectively outputs at least one plaintext inputted from the outside and an initial value corresponding to the number of each plaintext based on an encryption mode set by a sort of a service. The first and second encryption units(120,130) perform an encryption of each block by using the plaintext and the initial value which are selectively outputted from the encryption input selection unit(110). The encryption output selection unit(140) determines an output form of a ciphertext which is encrypted from the first and second encryption units(120,130) according to the encryption mode.
Abstract:
A low MAC(Medium Access Control) layer apparatus of a wireless internet system, and a data processing method using the same are provided to perform real time communication of large capacity data by performing a CRC(Cyclic Redundancy Code) generation work for encryption and data without time delay and transferring the generated CRC to a physical layer. A low MAC layer apparatus of a wireless internet system includes a physical layer interface(310), an upper MAC interface block(350), an uplink block(330), a downlink block(370), and memories(320,340,360,380). The physical layer interface(310) transceives a data signal and a control signal with a physical layer. The upper MAC interface block(350) transceives the data signal and the control signal with a MAC layer. The uplink block(330) performs a decoding work and a CRC checking work which are requested for uplink data. The downlink block(370) performs the CRC generation work and the encoding work which are requested for downlink data. The memories(320,340,360,380) store control information and data which are transferred between the physical layer interface block(330), the upper MAC interface block(350), the uplink block(330), and the downlink block(370).
Abstract:
무선 통신 시스템에서 기지국 내의 하위 계층인 MAC DSP(Media Access Control Digital Signal Processor)에서 방송 정보를 스케줄링하여 단말로 전송한다. 즉, MAC DSP에서는 상위 계층인 스케줄러로부터 기지국 초기화 시에 전송되는 명령 메시지에 포함되어 있는 방송 정보를 메시지별 DB에 저장하고, 저장된 방송 정보를 이용하여 현재 프레임에서 방송 정보의 전송 여부를 판단한 후, 단말로 방송 정보를 전송한다. 이렇게 함으로써, 일반적으로 스케줄링 기능을 수행하는 스케줄러의 CPU 처리량을 줄일 수 있는 효과를 기대할 수 있다. WiBro, 방송 정보, 기지국, 스케줄링, 하위 계층, 상위 계층
Abstract:
본 발명은 무선 통신 시스템의 AAL2(ATM Adaptation Layer2)타입 ATM셀의 QoS(Quality of Service)를 보장하기 위한 장치 및 방법에 관한 것으로, 제어부에서 정보 처리가 가능하다고 판단되고 타이머 내용 주소화 메모리에 저장 할 영역이 있을 경우 입력 선입선출메모리에서 정보를 받아들인다. 입력된 정보가 타이머 내용 주소화 메모리에 있는지 비교한다. 상기 제2 단계의 비교 결과, 입력된 정보가 타이머 내용 주소화 메모리에 있을 경우 해당 카운터를 초기화시킨다. 상기 제3 단계에서 해당 카운터를 초기화시킨 후 다시 동작시킨다. 상기 제4 단계에서 해당 카운터가 임계값에 도달했는지를 확인한다. 상기 제 5단계의 비교 결과, 상기 카운터의 임계값에 도달했을 경우, 상기 타이머 내용 주소화 메모리에 저장된 해당 정보를 출력한다. 이렇게 함으로써, 중앙처리장치의 부하를 줄이면서 AAL2 타입의 ATM 셀의 QoS보장을 할 수 있다.
Abstract:
PURPOSE: A controller for duplexing ethernet channel duplexing in duplex ethernet switch is provided to construct a further rapid and reliable duplexed system by a physical connection and disconnection of the Ethernet channel. CONSTITUTION: A controller for duplexing ethernet channel duplexing in duplex ethernet switch includes a first Ethernet switch board(A) and a second Ethernet switch board(B). The first Ethernet switch board(A) includes M numbers of media access control(MAC) engines for generating the Ethernet switch control state signals, an Ethernet switch controller(10A), M numbers of transformers(40A,41A,42A) connected to the M numbers of Ethernet ports, M numbers of analog switches(30A,31A,32A) connected between the M numbers of transformers(40A,41A,42A) and the physical devices(20A,21A,22A) and a first duplexed controller(50A). And, the second Ethernet switch board(B) is composed of the same structure and function of the first Ethernet switch board(A). The first duplexed controller(50A) and the second duplexed controller(50B) of the second Ethernet switch board(B) detect their operational status by the Ethernet switch control state signal and the process state signals of the CPU. And, the first duplexed controller(50A) and the second duplexed controller(50B) control the switch operations of the analog switches in response to their status.
Abstract:
An apparatus for wavelength assignment in wavelength multiplexing optical ring networks includes: a node section receiving a connection setup request, the node section comprising a plurality of nodes; and a wavelength assignment controller connected to the node section for, when the connection setup request occurs, determining paths available between the nodes using sparse wavelength conversion and limited wavelength conversion, calculating the total number of gaps for each node available, and assigning wavelengths to a path having the smallest total number of gaps. The present invention assigns wavelengths in consideration of both sparse wavelength conversion and limited wavelength conversion to minimize the call-blocking probability, and uses the wavelength in adjacent partitions to calculate the number of gaps for each wavelength and the total number of gaps.