Implementation of Switching System for High Speed Data Transmission using VHDL

Abstract

Switching system is used for data transmission between two communicating Channels. This transmission can be done via trunks or it can be fully wireless, technically termed as Telephone Switching and Mobile switching, respectively. The implementation of the switching system using VHSIC hardware description language is more reliable and efficient than the previous switching system (1). It converts entire bulky switching unit which consists of routers, multiplexers, decoders, counters in to a single integrated circuit . Simulation results are presented for transfer of data from input subscriber to the output subscriber using sequential write / random read mode with the timing diagram(2). To verify the transfer of data from input subscriber to the output subscriber a 32 bit op-code is assumed in which each bit represents a specific function. In our Paper we have worked on Switching System for two different channels using VHDL, each channel have 16 users. They can communicate either intra channel or inter channel. We are also providing Caller ID facility. The incoming data through the inlets are written into the data memory and later read out to the appropriate outlets. The incoming and outgoing data are usually in serial form whereas the data are written into and read out of the memory in parallel form. That's why it is necessary to perform serial to parallel conversion and parallel to serial conversion at the inlets and outlets respectively. We have selected 32 bit op-code for communication among these channels because its ability to define all the functions. This 32 bit op-code is responsible for caller id and transmission and reception of particular data. I have implemented my work with the help of Xilinx ISE and Modelsim 10.2a.