Design And Implementation Of Flow State Management System Based On FPGA

With the rapid development of network technology,the integration of Internet and satellite networks has become the development direction of future network communications.However,due to the differences in communication protocols and traffic rates between different network types,new challenges raise in the flow state control of multi-channel integrated networks.Therefore,how to design a scientific flow state control system to realize the coordinated state management and scheduling of traffic in a multi-channel network has become a hot issue of current research.The research in this article is aimed at such a research background,and designed a multi-channel flow state management system based on FPGA,acting on LVDS and optical fiber Ethernet.This design is mainly divided into two parts: the system hardware circuit design part and the system hardware logic design part.The hardware circuit design of the system is based on Kintex 7 series FPGA chips.The hardware circuit design and implement the following functional modules include FPGA modules,low-voltage differential signal modules,physical layer modules,SFP+ interface circuit of optical module,power modules,clock module and reset module.In addition,PCB layout is also studied and designed.The system hardware logic design part also uses the FPGA chip as the core and performs hardware logic programming based on the functions to be implemented by each external interface.This part can be divided into the following flow control modules based on the overall architecture design of the flow state control: Gigabit Ethernet interface module,10 Gigabit Ethernet interface module,Gigabit Ethernet protocol module,10 Gigabit Ethernet protocol module,differential transceiver module,data conversion module,and data buffer module,so as to achieve different network data flow control management requirements under multi-protocol.After system board-level circuit debugging and logic verification,the system has achieved packet format conversion of multi-channel low-voltage differential signals and optical fiber data.The system has also achieved flow state control during transmission.It has the advantages of low cost,high integration,and high stability.