Design And Implementation Of EPON ONU Based On FPGA

With the development of the information technology, we accept much more informationin our daily life than before. Broadcasting television network, computer network andtelecommunications network are integrating into each other. To share network resource, thethree_network fusion has become an inevitable trend of network development.Broadcastingtelevision network in present can only afford basic broadcasting and television programmesand it’s difficult to afford high bandwidth multimedia business.So it’s an urgent thing toupgrade broadcasting television network. The bandwidth of core network has been increasedrapidly because of SDH technology, but the access network has the limited transmittabilitydue to the physical medium.So in order to upgrade the whole network, the most importantthing is improving the access network. So far fiber is the best transmit medium.Compared toother physical medium,the medium of fiber support higher bandwidth,better transmit qualityand anti-interference ability. So fiber access network has become the solution of accessnetwork alteration. Broadcasting television operators home and abroad are pushing thesolution of EPON&EoC. The EPoC access technology proposed by IEEE is complying withthis standard.Based on Startix IV FPGA of Altera, this project implements the digital hardwaredesign of EPON ONU using the QuartusII and modelsim tools. The design realizes theuplink and downlink data access,multi-point MAC control protocol in FPGA according tothe standard of IEEE802.3ah, which can simplify the design of PCB and reduce cost. Inaddition, it also realizes the optional FEC encoding and decoding function.The design of10G EPON ONU is realized in EP4SGX230KF40C3chip of Alteraand debugging with standard OLT equipment. Downlink and uplink data rate and packetloss ratio can both satisfy the requirements.