ATM SWITCH MATCHING DEVICE OF WIRELESS NETWORK CONTROL STATION IN IMT-2000 ASYNCHRONOUS SYSTEM

摘要

PURPOSE: An ATM switch matching device of a wireless network control station in an IMT-2000 asynchronous system is provided to realize an extended area service by connecting sub-systems and forming a communication path. CONSTITUTION: A UTOPIA switch transmitter(212) receives an ATM cell from a core network and distributes it to a wireless network control station connecting/controlling unit(211). A UTOPIA switch receiver(217) receives an ATM cell for a call request transmitted from a base station and performs a multiplexing function. A usage control and OAM(Operation, Administration and Maintenance) processor(213) controls an amount of transmission data according to a transmittable amount and maintains a normal transmission state. A routing and multicasting processor(214) transfers an input cell to non-specific plural channels or to every output terminal for a broadcast and video service. An ATM switch mating unit(215) transmits and receives data by the unit of nibble by using an LVDS(Low Voltage Differential Signal). An ATM switch unit(2) performs an 16x16 switching function at the rate of 155Mbps and has a processing rate of 2.5Gbps. A controller(218) controls initialization of an ATM switch mating unit(1). An ATM UTOPIA mating unit(220) enables the UTOPIA switch transmitter(212) and the UTOPIA switch receiver(217) to perform a multiplexing or demultiplexing operation and has a transfer rate of 155Mbps. A memory unit(219) includes a flash ROM used for booting the controller(218), an SDRAM used for executing a program, and an SRAM used for channel mapping, a connection table and a buffer descriptor. An Ethernet mating unit(221) sets a communication path to the inside or the outside. A serial communication mating unit(222) executes a debugging operation.