The Design And Implementation Of High-speed And Multi-protocol Interface On The Satellite Onboard Switch

Since ancient times,people have never stopped tramsmitting information.After the birth of the Internet,information transmission through the Internet have gradually become the mainstream.But with the continuous development,the traditional Internet model has been unable to meet the needs of high-speed development,and the Satellite Internet is born.Satellite Internet can provide both access function and relay function,As one of the core technologies of Satellite Internet,onboard switch needs to be compatible with all data communication scenarios.Ser Des chip with high speed and large capacity is needed for satellite to ground link and satellite to satellite link;The data communication between the devices connected to the onboard switch needs to use the Space Wire protocol with higher stability;the data communication inside the onboard switch needs to use the Aurora protocol developed by Xilinx;finally,the onboard switch needs to be configurable,so CPU interface is needed.In this paper,the implementation scheme of the onboard switch based on FPGA in the satellite internet system is studied,with the emphasis on the specific design of the onboard switch interface,including the Ser Des interface based on TLK2711 chip of TI company,the Space Wire interface based on the Space Wire protocol,the Aurora interface based on the Aurora protocol of Xilinx company and the CPU interface based on the three wire serial port.And in order to meet the requirement of higher rate in the future,the specific implementation scheme of 100 G optical port is also studied.Finally,the simulation test and board level test platform are built to test and verify the onboard switch interface module.The innovation of this paper is that,firstly,a variety of protocol interfaces are designed and implemented on the onboard switch,including Ser Des interface,Space Wire interface,Aurora interface between chips,CPU interface,etc;Secondly,the interface rate and exchange capacity of the onboard switch are greatly improved;Thirdly,a variety of test platforms are built to verify the satellite switch.