Abstract:
PURPOSE: A system for analyzing a function of a CODEC ASIC and a method thereof are provided to simply determine the function operating capacity and the precision of the operation of an MPEG-4 CODEC in which an MPEG-4 simulator is realized. CONSTITUTION: A system for analyzing a function of a CODEC(Coder-Decoder) ASIC(Applicable Specific Integrated Circuit) includes an ASIC function analyzing element(B) for carrying out encoding, decoding, CODEC of non real time and real time CODEC operations according to input function operating mode information, and transmitting test images and bit stream data for the function operation modes, a simulation element(A) for providing the function operation mode information to the ASIC function analyzing element and comparing function analysis result values provided from the ASIC function analyzing element with self-produced result values for analyzing the function of a corresponding mode of the ASIC function analyzing element, and a transmitting/receiving matching element(C) for setting a matching path with the simulation element for transmitting or receiving data with the ASIC function analyzing element.
Abstract:
PURPOSE: A paging system in mobile communication is provided to install a registration list where identifiers are registered, and to update the registration list whenever receiving calls are generated in mobile terminals or the mobile terminals move between cells, thereby saving paging frequency and paging channels. CONSTITUTION: An HLR(310) and VLRs(321,322) search an area where a receiving mobile terminal(200) is located, according to a call request of a transmitting terminal station(100), and transmit a call. MSCs(331,332) receive the call from the HLR(310) and the VLRs(321,322), and transmit paging request signals. Base stations(351-356) receive the paging request signals from the MSCs(331,332), and determine whether to page by retrieving a registration list, then determine to maintain or delete information of the corresponding receiving mobile terminal(200).
Abstract:
PURPOSE: A system for analyzing a function of a CODEC ASIC and a method thereof are provided to simply determine the function operating capacity and the precision of the operation of an MPEG-4 CODEC in which an MPEG-4 simulator is realized. CONSTITUTION: A system for analyzing a function of a CODEC(Coder-Decoder) ASIC(Applicable Specific Integrated Circuit) includes an ASIC function analyzing element(B) for carrying out encoding, decoding, CODEC of non real time and real time CODEC operations according to input function operating mode information, and transmitting test images and bit stream data for the function operation modes, a simulation element(A) for providing the function operation mode information to the ASIC function analyzing element and comparing function analysis result values provided from the ASIC function analyzing element with self-produced result values for analyzing the function of a corresponding mode of the ASIC function analyzing element, and a transmitting/receiving matching element(C) for setting a matching path with the simulation element for transmitting or receiving data with the ASIC function analyzing element.
Abstract:
PURPOSE: A synchronous video terminal apparatus using a video coder for an ISDN(Integrated Services Digital Network) and data flowing control method thereof is provided to prevent the loss and delay of a transmitting and receiving compression data by generating a network synchronous clock signal from a synchronous signal of an advanced mobile communication(IMT-2000) network to provide the generated network synchronous clock signal continuously and adjusting a data quantity of a buffer according to a transmission bit rate. CONSTITUTION: An ISDN video coder(7) supports a multiplexing and demultiplexing to a compressed an audio/video data according to a standard and performs a compression and decompression to the audio/video data. A transmitting FIFO(8) stores the audio/video compression data outputted from the ISDN video coder(7). A receiving FIFO(9) stores a received audio/video compression data and provides the stored audio/video compression data to the ISDN video coder(7) when being requested by the ISDN video coder(7). A synchronous signal generating circuit(11) generates a network synchronous signal of the ISDN video coder(7) using a transmitting and receiving frame synchronous signal and a reference clock. A CPU(10) provides a transmitting and receiving timing interrupt signal using the transmitting and receiving frame synchronous signal, reads data from the transmitting FIFO(8) when generating the transmitting and receiving timing interrupt to compose the read data as a wireless transmission frame and transmit the wireless transmission frame, and decomposes a received wireless receiving frame to store a decomposed data.
Abstract:
본 발명은 무선 비동기 전송모드(ATM) 전송 기술의 구현 및 기능 검정을 위한 시스템으로, 무선 ATM 전송 장치(Wireless ATM Cell Control System)의 무선 패킷 동기 수신 장치 및 방법에 관한 것이다. 무선 ATM 전송 기술은 음성, 영상, 데이터 등 다양한 형태의 정보를 무선 구간으로 전송하기 위해 낮은 에러 율과 높은 전송 효율을 갖는 기존의 ATM 유선 망과 접목하여 무선 전송하고자 하는 기술이다. 유선 망에서의 ATM 셀 들은 고속으로 전송되므로 무선 상에서 이들을 처리하기 위해서는 고속의 무선 송수신 처리 기술이 필요하다. 무선 ATM 전송 장치가 ATM 셀을 낮은 무선 전송 에러 율을 가지고 목적지까지 전송하기 위해서는 무선 구간에서만의 데이터의 변형이 필요하다. 따라서, 무선 ATM 전송 장치는 ATM 셀에 목적지의 주소(Address), 낮은 전송 에러 율을 가지기 위한 헤더(Header)와 트레일러(Trailer) 등을 삽입하는 MAC 기능을 가지고 있다. 본 발명에서는 수신되는 무선 패킷을 보다 고속으로 처리하기 위해 무선 수신 패킷의 헤더(Header)부분을 하드웨어 동기 장치로서 검출하여 수신한 다음, 트레일러(Trailer)부분을 소프트웨어로 검정하는 무선 패킷 동기 수신 장치를 구현하였다. 무선 패킷 동기 수신 장치의 구현에 의해 무선 수신 패킷 변환 장치에서 패킷을 수신하기 위해 순차적으로 데이터를 검색하는 시간을 절약한다.
Abstract:
PURPOSE: A measurement method using a multi antenna measuring system is provided to reduce time for measuring a channel and to increase the accuracy of a visible region determination by classifying the measured data into visible region data and invisible region data. CONSTITUTION: A measurement method using a multi antenna measuring system is comprised of the following steps: a step of measuring a K-factor parameter(KF) and a delay dispersion parameter(DS) by using wireless space data which is measured by the multi antenna measuring system; a step of calculating the estimated K-factor parameter and the delay dispersion parameter; and a step of determining the calculated result as the visible region data if the result is equal or greater than the predetermined reference value or as the invisible region data if the result is less than the predetermined reference value. [Reference numerals] (AA) Start; (BB) K-factor parameter; (CC) Region spread parameter; (DD) No; (EE) Yes; (FF) Visible region data determination; (GG) Invisible region data determination; (HH) Stop
Abstract:
PURPOSE: A wireless relay channel measuring device is provided to measure a wireless relay channel about a wireless link between a base station, relay and a terminal. CONSTITUTION: According to a user input, a control unit(110) establishes one operating mode among a base station mode, a relay mode or a terminal mode. According to the fixed operating mode, the control unit performs transceiving control of a signal for wireless relay channel measurement.