Design And Implementation Of The New Space Station Network Ethernet Switches

Given the broad application of the space industry and expanded of the manned spaceflight based on space station, the existing spaceflight communicateon network system displays limits in speed, Qos or expansibility. Thus, a new kind of Aircraft Data Network is designed for large-scale space equipment communication applications.Traditional Ethernet, as present main stream transmission technology,has met most LANs requirements because of the abundant foundation and the long-term technique accumulation. The Ethernet technology can not only be applied on commercial, but also be applied on industry and national defense through being improved properly. For example, AFDX-Avionics Full Duplex Ethernet based on IEEE802.3Ethernet technology has been appliedon the aviation industry domain. So far the Ethernet technology has notbeen adopted in aerospace application and it must have a bright further.This thesis expands upon the previous research and focuses on a novel architecture for space internet oriented gigabit ethernet switching. It presents the project of Space Station Network, the switching fabric of Ethernet switch, reliability design and the system tests. This thesis aims to achieve the following objectives:Firstly, the existing switch fabrics are compared. For specific application, it proposed a novel switching fabric named CICQ_P, which suppors the priority switching. Then, to reduce radiation effects such as single event effect on the impact of data exchange network, improve data flow’s reliability in the switch and the transmit table, and improve the reliability of data exchange, the CRC and TMR are implemented and simulation via ModelSim. Finally, under the requirement of spacestation chips, the prototype Gigabit swith system is designed which can work in the specific application environment based on specifically chips (A3PE1500). In the end, the functional test is simulated to analyze the system prefonnance.To perform the data communication in transfer space equipment, the novel switching fabric named CICQ_P is designed which can deal with instruction frame in time, satisfy its priority, and decide the data frame priority. The CRC and TMR are first implemented in data exchange. The test is designed as well. The Gigabit Ethernet switch is developed which can achieve exchange frame throughput100%, drop-out0, and line speed communication. The research in this thesis reveals a novel theory and method for designing the advance Gigabit Ethernet switching in space equipment communication applications.