Abstract

In order to take advantage of the widely-deployed existing SDH network for transporting the traffic of multi-media applications such as voice, data and video, ITU-T have standardized new technologies including GFP (Generic Framing Procedure), LCAS (Link Capacity Adjustment Scheme) and RPR (Resilient Packet Ring), which will be implemented on this network. GFP is the basis for mapping different types of traffic such as Ethernet, SAN - Storage Area Network (ESCON, FICON, Fiber Channel), DVB ASI...etc into SDH virtual containers. In the scope of the paper, we study the mentioned technologies, especially ITU-T G.7041 standard for GFP which specifies types of header, error correction algorithms, frame delineation algorithm for mapping and unmapping GFP frames. Based on this standard, we have used VHDL to figure out a complete GFP core with MAP and UNMAP sub-cores. The core is tested on Xilinx ModelSim5.6. Then these VHDL modules are compiled by ISE 6.3 3i to be implemented on FPGA hardwares of Xilinx Company.