Abstract:
PURPOSE: An apparatus and a method for using an idle skirt in an HDR(High Data Rate) mobile system is provided to improve data transmission efficiency by using an idle skirt in transmitting data and control signals in the case of an idle slot at the downlink of an HDR system. CONSTITUTION: Data bits, transmitted through a CCCH(Common Control CHannel), are encoded at an encoder(101). The encoded data are inputted to an interleaver(102). The data processed and outputted from the interleaver(102) are spread into 32 Walsh codes at a Walsh cover processor(104) through a DEMUX(103). The DEMUX(103) receives 31 bits for encoding and converts the 31 bits into 31 parallel channels for spreading. The 31 parallel channels are spread by 31 among the 32 Walsh codes, except Walsh code #0 allocated to a pilot. The spread data respectively are added at a chip level adder(105) by the chip, and then repeated 4 times at a repeater(106) together with an MAC(Media Access Control) channel.
Abstract:
본 발명에 따른 이동국이 기지국에게 요구하는 복수의 순방향 데이터 전송율들중 선택된 하나를 나타내는 데이터율 제어정보를 상기 기지국으로 전송하는 이동통신시스템의 통신방법이, 상기 기지국이, 복수의 타임슬롯들내에 상기 데이터율제어 정보를 반복하는 상기 슬롯들의 개수를 나타내는 데이터율 제어정보 길이(DRC_Length)를 지정하여 상기 이동국으로 전송하는 과정과, 상기 이동국이, 상기 기지국으로부터 수신된 상기 데이터율제어 정보 길이마다 하나의 타임슬롯에 상기 데이터율제어 정보를 단속적으로 기지국으로 전송하는 과정을 포함한다.
Abstract:
PURPOSE: An apparatus for controlling a continuous outer power control loop is provided to control the outer power control loop regardless of data, by tabling frame error rates for signal-to-noise(SN) ratios, and by referring to the tabled frame error rates to decide whether frames have errors when the data is not transmitted in a discontinuous transmission mode of a code division multiple access(CDMA) communication system. CONSTITUTION: An apparatus for controlling a continuous outer power control loop comprises a cyclic redundancy check(CRC) error detector(925), a frame detector(924), a signal-to-noise ratio calculator(919), a data detector(927), and a frame error detector(929). If a frame is received, the CRC error detector checks an error of the frame to output a checked result. The frame detector measures energy of the frame to output the frame. The signal-to-noise ratio calculator calculates signal-to-noise ratios to output the ratios. The data detector receives the checked result and the frame energy to generate an existing frame flag message. The flag message presents whether a frame exists or not. If a frame received by the flag message exists, the frame error detector outputs the checked result to the outer power control loop. If the frame does not exist, the frame error detector estimates a frame error by the signal-to-noise ratios.
Abstract:
PURPOSE: A channel communication device and method in telecommunication system using transmission antenna diversity is provided to effectively use limited code without other code for a common channel, to reduce power consumption and to enhance the capacitance of a mobile station. CONSTITUTION: A channel communication device in telecommunication system using transmission antenna diversity comprises at least two antennas(A,B), a common channel transmitter and a dedicated channel transmitter. The common channel transmitter alternately switches forward common channel data in first and second periods through the antennas to transmit them. The dedicated channel transmitter transmits forward dedicated channel data to an antenna selected from the two antennas by an antenna switching indication from a mobile station.
Abstract:
부호분할다중접속 통신시스템의 섹터들이 핸드오프 영역에 위치된 핸드오프 단말기의 순방향 링크 데이터를 서비스하는 방법이, 핸드오프 단말기로부터 데이터 서비스를 요구받은 서비스섹터가 핸드오프 단말기의 활성집합에 속한 섹터들을 아이들 섹터로 등록하는 과정과, 서비스섹터가 핸드오프 단말기에 데이터 트래픽을 서비스하며 아이들 섹터로 등록된 섹터들은 데이터 트래픽 서비스를 중단하는 아이들 슬롯 상태로 천이과정으로 이루어진다.
HDR, handoff, CDMA, idle sector, service sector, schedulor
Abstract:
A device and method for outer-loop power control in a discontinuous transmission mode in a CDMA mobile communication system. In an outer-loop power control method for a non-frame data transmission period of a dedicated control channel (DCCH) which transmits frame data discontinuously, the signal-to-noise ratio (SNR) of power control bits (PCBs) received at a mobile station from a base station is measured for the frame period, and it is determined whether the frame has errors based on the measured SNR. A closed-loop power control threshold is increased if a frame error exists and decreased if no frame errors exist.
Abstract:
PURPOSE: A spreading modulation method for reducing a peak to average power ratio in transmission power of a terminal, and an apparatus therefor are provided to flexibly control transmission power of a terminal and control a cell area by limiting a range of a peak to average power ratio in the transmission power, and improve auto-correlation and cross-correlation characteristics. CONSTITUTION: A complex signal comprised of in-phase data I-data and quardrature- phase data Q-data is inputted to a complex spreader as a first input signal. A PN(Pseudo Noise)_1 generator(4) generates PN_1 sequence to a π/2 DPSK(Differential Phase Shift Keying) generator(6). The π/2 DPSK generator(6) generates complex spreading sequences PN_I and PN_Q by using the generated PN_1 sequence, where a phase change between complex spreading sequences PN_I and PN_Q is π/2, thereby removing zero-crossing. The generated complex spreading sequences PN_I and PN_Q are inputted to the complex spreader as second input signals. The complex signal is complex-spreaded by using the P_1 sequence and is respreaded by P_2 sequence.
Abstract:
본 발명은 부호분할다중접속 이동통신시스템 송신기의 송신 스위칭 다이버시티 장치 및 방법에 관한 것으로, 특히 안테나의 최대 송신전력을 제한하여 송신 스위칭 다이버시티를 실행하는 장치 및 방법에 관한 것이다. 적어도 두 개 이상의 안테나와, 최대 전력 제한 값을 저장하고 상기 안테나를 통해 송신될 다수의 사용자 데이터의 안테나 패턴을 저장하고 있는 패턴 저장부를 구비하는 송신 스위칭 다이버시티에서 안테나의 최대 송신전력 제한 방법에 있어서, 새로운 사용자 데이터 발생 시 상기 안테나에 할당된 송신전력을 측정하고, 상기 안테나에 할당된 송신전력 중 상기 새로이 발생한 사용자 데이터의 송신전력을 합한 값이 상기 최대 송신 전력 제한 값을 넘지 않는 안테나로 상기 사용자 데이터를 할당함을 특징으로 한다.
Abstract:
PURPOSE: An apparatus and method for transmitting RPC(Reverse Power Control) channels in a mobile system supporting an HDR(High Data Rate) system is provided to solve a delay problem in applying RPC channels and to transmit two different RPC channels a slot. CONSTITUTION: An encoder(607) encodes and outputs data traffic channel data. A modulator(609) executes QPSK(Quadrature Phase Shift Keying) for the output of the encoder(607) and outputs I/Q signals. An interleaver(611) interleaves and outputs the output of the modulator(609). A puncture/repeat unit(613) punctures and repeats the output of the interleaver(611) according to a given pattern. A demultiplexer(615) demultiplexes and outputs the output of the puncture/repeat unit(613). An orthogonal spreader(617) multiplies the output of the demultiplexer(615) by a 16-long orthogonal code for orthogonal spreading. A repeater(623) repeats preamble data given times and outputs the data. A multiplier(625) executes orthogonal spreading by multiplying the output of the repeater(623) by a given orthogonal code and outputs a preamble signal. A multiplexer(619) executes time division multiplexing for the data traffic channel signal from the orthogonal spreader(617) and the preamble signal from the multiplier(625).