Wide Band Wireless Multi-Media Communication System And Cell Planing Method

摘要

The present invention relates to a broadband wireless multimedia communication system that provides a high-speed broadband multimedia service to subscribers suitable for wireless Internet, WLL, leased line services by integrating and interworking with an ATM-based wired network. The broadband wireless multimedia communication system according to the present invention comprises an Internet gateway for providing an ATM-LAN service to a subscriber device and an ATM switch connected to the Internet gateway for analyzing data of an ATM cell structure. Multiplexing and demultiplexing ATM data for multiplexing the digital data stream, managing the entire network and each subscriber data, ATM communication with the central station, and performing routing operation by analyzing the data transmitted from the central station And a plurality of upstream and downstream stream adjusters configured to modulate a signal output from the Mac processor and to adjust a channel frequency of the modulated signal, or to adjust a channel frequency provided from the subscriber device. , Output from the central station Demultiplexes and modulates a plurality of ATM traffic signals and outputs them respectively, or a plurality of head ends for demodulating and multiplexing input radio frequency signals and transmitting them to the central station, respectively, and an optical signal output from the head end. A plurality of base stations converting the signal and amplifying at a predetermined amplification ratio to the called party or transmitting the intermediate frequency signal transmitted by the subscriber to the optical signal and transmitting the optical signal to the headend, respectively, Or a subscriber station (CPE) which connects to the terminal device or converts the data transmitted by the terminal device into an ATM cell structure and transmits the data to the base station.