Hyundai Curitel, Inc.

Chang-Hwan Ji

An apparatus for and a method of allocating D-channel to minimum channel when performing a basic rate interface (BRI) in WLL, in which D-channel is allocated to the minimum channel when connection is made to V5.2 of WLL exchanger and BRI, while satisfying WLL standards, and system maintenance and extension can be easily achieved by having a modular mounting board, the apparatus includes a first and a second analog/digital (A/D) signal converting units for converting an analog signal input from a radio frequency unit (RFU) into a digital signal and transmitting the converted signal to RFU, and converting the received digital data to analog data and transmitting the converted signal to RFU; a first and a second modem units for code-dividing data inputted from the first and second A/D signal converting units; a channel handler/HDLC controller for searching D-channel from data outputted from the first and second units and combining D-channel to a single channel of 64 Kbps; a CPU for framing data received from the channel handler/HDLC controller for use of IPC communication and performing control over a block; a memory for temporarily storing variables or data, being connected to the CPU; an IPC interface unit connected between the CPU and a main processor so as to perform IPC communications; and a mux/demux unit for multiplexing data of 64 Kbps outputted from the first and second modem units to data of 2,048 bps.

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Pusan-shi, South Korea

Chang-Hwan Ji