公开(公告)号：US06393280B1

公开(公告)日：2002-05-21

申请号：US09515423

申请日：2000-02-29

申请人： Hun Lee ,  Yunn-Ghee Kim ,  Sung-Gyu Choi ,  Sang-Jin Hur ,  Su-Man Eo

发明人： Hun Lee ,  Yunn-Ghee Kim ,  Sung-Gyu Choi ,  Sang-Jin Hur ,  Su-Man Eo

IPC分类号： H04B700

CPC分类号： H04W88/02 ,  H04L1/004 ,  H04W52/04 ,  H04W52/50 ,  H04W52/52 ,  H04W52/54 ,  H04W84/14

摘要： A modulator-demodulator (modem) used in radio interface unit (RIU) is modeled as master and slave, respectively, so as to allow a rapid handling of service, a stabilized system, and an efficient utilization of wireless systems. The RIU in wireless local loop network system, in which the RIU has a subscriber interface module for interface with subscriber terminal and data, a high frequency processing module for transmitting/receiving radio data to/from a radio port via an antenna, and a modem for converting and interfacing data between the subscriber interface module and the high frequency module, includes: a modem unit having a master modem which performs an automatic frequency control function for a direct control of a high frequency, power control function, and automatic gain control function, and is provided with a pilot channel, power control channel, and signaling channel only when the master modem operates as a primary one, and a plurality of slave modems which have pilot, power control and signaling channels and receive power control and signaling channels only when the slave modems operate as a primary one, and which receive only the power control and signaling channels when they operate as a secondary one; and a control module for controlling transmitting/receiving state of the modem unit and state of the subscriber interface module.

摘要翻译： 在无线电接口单元（RIU）中使用的调制解调器（调制解调器）分别被建模为主机和从机，以便允许快速处理业务，稳定的系统以及无线系统的有效利用。 无线本地环路系统中的RIU，其中RIU具有用于与用户终端和数据接口的用户接口模块，用于经由天线向/从无线端口发送/接收无线电数据的高频处理模块和调制解调器 用于在用户接口模块和高频模块之间转换和接口数据包括：具有主调制解调器的调制解调器单元，其执行用于直接控制高频，功率控制功能和自动增益控制功能的自动频率控制功能 并且仅在主调制解调器作为主要调制解调器操作时被提供有导频信道，功率控制信道和信令信道，以及具有导频，功率控制和信令信道并且仅接收功率控制和信令信道的多个从调制解调器 当从调制解调器作为主调制解调器工作时，并且当它们作为二进制操作时仅接收功率控制和信令信道 一个 以及用于控制调制解调器单元的发送/接收状态和用户接口模块的状态的控制模块。