Abstract:
PURPOSE: A double modulation and demodulation high frequency wave transmitting and receiving device for commonly implementing RF is provided to allow a plurality of signals of different modulation and demodulation methods to be transmitted by the same RF. CONSTITUTION: A double modulation and demodulation high frequency wave transmitting and receiving device(100) for commonly implementing RF includes Gaussian frequency shift keying and quadrature phase shift keying base band signal control block(10), a radio frequency down stream conversion block(20), an RF local signal generation block(30), an RF upstream conversion block, a panel selection filter block(50), an intermediate filter down stream conversion block(60), an intermediate frequency local signal generation block(70), an intermediate frequency upstream conversion block(80), a bandpass filter(11), a switch(12), a plurality of switch drivers(13,14,15,16,17), a reception signal intensity detector(18) and a peak detector(19). In the double modulation and demodulation high frequency wave transmitting and receiving device(100), the digital signal inputted from the base band is converted into analog signal at the digital to analog converters. The high frequency components of in-phase and quadrature-phase signals outputted from the digital to analog converters are removed at the low pass filters and inputted to the I/Q modulators.
Abstract:
PURPOSE: A dual mode coding/decoding apparatus of a line code using a code detection and a method thereof are provided to increase the initializing speed by using a received code word on an operation determination of a dual mode system. CONSTITUTION: A management register(100) stores a control signal for selecting an operation of a MB810 coder(105) and a 8B/10B coder(110) and provides the stored selection control signal to the MB810 coder(105) and the 8B/10B coder(110). The MB810 coder(105) is operated by the selection control signal provided from the management register(100) and codes 32bit data of 4 lane transferred from an MAC(Media Access Control) to transfer it to the other decoding unit through a communication line. The 8B/10B coder(110) is operated by the selection control signal provided from the management register(100) and codes 32bit data of 4 lane transferred from an MAC(Media Access Control) to transfer it to the other decoding unit through a communication line. A coding-side 2:1 multiplexer(120) selects an output of the MB810 coder(105) and the 8B/10B coder(110) by the selection signal provided from the management register(100) to send the same.
Abstract:
PURPOSE: An interface device and method for high-speed physical layer transmission suitable for a wireless LAN(Local Area Network) is provided to quickly and efficiently perform an interface with a wireless physical layer by composing a multiple transmission and receipt queue classified according to a transmission rate and processing data through N addressing using a module with a circular buffer type. CONSTITUTION: A demultiplexer(611) classifies inputted data into a plurality of packets according to a transmission rate and inputs the classified data to each transmission circular buffer(613a-613c) according to the control of a transmission buffer controller by the transmission rate. A multiplexer(612) transmits the data stored in each transmission circular buffer(613a-613c) to a wireless physical layer(200) according to the control of the transmission buffer controller. The transmission buffer controller controls the demultiplexer(611) and the multiplexer(612). A demultiplexer(621) classifies the data inputted through the wireless physical layer(200) into a plurality of packets according to the transmission rate, and inputs the classified data to each receipt circular buffer(623a-633c) according to the control of a receipt buffer controller(620) by the transmission rate. A multiplexer(622) transmits the data stored in each receipt circular buffer(623a-633c) to an MAC(Medium Access Control) controller(300) according to the control of the receipt buffer controller(620). The receipt buffer controller(620) controls the demultiplexer(621) and the multiplexer(622).
Abstract:
PURPOSE: A network management method in an ATMARP(ATM(Asynchronous Transfer Mode) Address Resolution Protocol) server - client network using an SNMP(Simple Network Management Protocol) is provided to remotely manage various information on the ATMARP server - client by using the SNMP. CONSTITUTION: A system analyzes a protocol of a received message(101). If the received message is LIS(Logical IP(Internet Protocol Subnet)) information(103), the system retrieves an LIS table(104), and generates a corresponding SNMP(Simple Network Management Protocol) message for transmitting(120,121). If the message is client or server information(107), the system retrieves a kernel of an ATMARP(ATM(Asynchronous Transfer Mode) Address Resolution Protocol)(108), and generates a corresponding SNMP message for transmitting(120,121). If the message is virtual channel information(109), the system retrieves a virtual channel kernel(110), and generates a corresponding SNMP message for transmitting(120,121). If the message is perpetual virtual channel information(111), the system retrieves a perpetual virtual channel kernel(112), and generates a corresponding SNMP message for transmitting(120,121). If the message is interface information(114), the system retrieves the interface information(115), and generates a corresponding SNMP message for transmitting(120,121). If the message is ATM adaptation layer information(116), the system retrieves an ATM adaptation layer kernel(117), and generates a corresponding SNMP message for transmitting(120,121). If the message is interface management information(118), the system retrieves interface construction information(119), and generates a corresponding SNMP message for transmitting(120,121).
Abstract:
본 발명은 무선 ATM LAN 시스템에서의 매체접근제어 처리장치에 관한 것으로서, 기지국에서 이동 단말로 전송되는 데이터에 대한 처리를 수행하는 제 1 전송부와, 이동 단말에서 기지국으로 전송되는 데이터에 대한 처리를 수행하는 제 2 전송부와, 상기 제 1 전송부를 통해 전송되는 데이터에 대하여 MPDU데이터 및 일정 형식의 제어 프레임을 생성하고, 상기 제 2 전송부를 통해 전송되는 데이터에 대하여 전송 오류를 검색하여 해당 처리를 수행하도록 제어하는 채널 할당/스케쥴링 처리부로 구성되며, 상기 제 1 전송부를 통해 이동 단말로 전송되는 제어 프레임은 프레임 헤더 영역과, MPDU 전송 영역과, 제어/관리 프레임 전송 영역을 포함하여 기지국에서 이동 단말로 전송되는 데이터에 대한 정보를 저장하는 하향 전송 구간과, MPDU 전송영역과, 제어/관리 프레임 전송 영역을 포함하여 이동 단말에서 기지국으로 전송되는 데이터에 대한 정보를 저장하는 상향 전송 구간으로 구성되는 것을 특징으로 하여, 아직 연구단계인 무선 ATM LAN 시스템을 조기에 상용화할 수 있는 기반을 제공할 수 있으며 관련된 하드웨어의 구현시 활용할 수 있다는 효과가 있다.
Abstract:
본 발명은 ATM 크로스컨넥터의 스위치 구성시에 소요되는 스위칭 소자 수의 반으로도 내부 교환 기능이 필요없도록 하는 단순 2 단 스위칭소자 연결구조를 갖는 ATM 크로스컨넥터에 관한 것으로, 이와같은 본 발명은 SNI로 통신망과 접속하는 망측 정합부와, UNI로 가입자측과 접속하는 가입자 정합부와 가입자 측끼리의 내부 교환 기능이 필요없는 크로스컨넥트 기능을 수행하는 스위치부와, 전체 시스템의 연결등을 제어하는 시스템 제어부와, 외부의 망관리 시스템과의 접속을 담당하는 망관리 인터페이스부와, 시스템 전체의 전원과 망 동기 클럭을 공급하는 전원 및 망동기부로 구성된다.
Abstract:
The system for transmitting-receiving the voice and the graphic information comprises a means (20) for inputting the graphic information; a means for displaying the received graphic information; a means for printing the received graphic information; a graphic codec and controller outputting the telewriting data which the system controller of ISDN telephone can recognize to the displaying means or the printing means; an input/output interface (24) for telewriting. The problems such as the degradation of voice mail generating at the existing telephone network can be solved by using this system.
Abstract:
PURPOSE: A mobile device adopting mobile cloud platform is provided to have a double structure which is configured with a mobile cloud manager group and a mobile terminal group and to enable those groups to respectively form a cloud network. CONSTITUTION: A mobile cloud platform layer(23) visualizes the resources provided from a mobile terminal apparatus, and a mobile cloud application layer(21) provides a user with a service requested by the user through a virtual mobile terminal user interface. A mobile cloud service layer(22) provides the requested service regardless of the variation of the mobile terminal environment constantly. The requested service is provided from the mobile terminal device and/or plural other mobile terminal devices.