The Network Modeling And Algorithm Analysis Based On Space Wire Network Layer

With the continuous development of space science and technology,the number and kinds of devices in the system are increasing rapidly, the ability of network self-adaptive,transmit efficiency and fault tolerant in on-board space-craft systems also will also need to be improve. SpaceWire bus protocol is such a protocol that high-speed, high efficiency, good resistance to harsh of a spacecraft onboard equipment system and received the attention of many re-search institutions. This paper studies on the SpaceWire bus protocol on the basis of full, explores and analyzes the link-state routing algorithm and group adaptive which the router adopted in network layer, designed the module of link-state routing algorithm and group adaptive, and achieve the purpose of improving the ability of network self-adaptive,transmit efficiency and fault tolerant in on-board spacecraft systems.Paper first introduced the SpaceWire bus protocol, depth discussd the content of network layer, proposed the thought of link-state routing selected module based on SpaceWire high-speed bus Wormhole router, completed the design of this module,this design is divided into four major functional mod-ules:find and test module, creat LSA module, transmit LSA module and routing table module, realized the whole process from the router start to ac-cording to link-state routing algorithm generating routing table.and then,this design adopted Xilinx ISE 9.2i as develop environment, using a simple net-work model veriied this design. The verification results show that by using link-state routing algorithm can increase the self adaptive ability of router.At the same time, this paper detailed descripte the principle of SpaceWire group adaptive technology, preliminary designed the group adaptive mod-el,verified the advantages of the group adaptive in aspects of increasing the efficiency of data transmitting and improving the falt tolerance of SpaceWire network.