SpaceWire Bus And RMAP Protocol Network Performance Research And Implement

Since the standardization of Space Wire in 2003, the technical achievements based on the standard protocols have also appeared in many international space missions. These technology applications has been realized from the part of the implementation early to achieve all-round development, low-level realization to the high-level development, making the Space Wire become suitable to the needs of modern space data network. It becomes a serial, high-speed, to the point, full duplex data bus network. The Space Wire based protocol and RMAP high-level protocol is discussed on the basis of SpaceWire network performance evaluation mechanism, it is concluded that the adaptive group routing mechanism to build the theoretical basis of the excellent performance of Space Wire network, to design and implement the rmap user terminal IP core and corresponding Space Wire router unit IP core.First, according to the requirements of the satellite data bus management system, the sequence and response mechanism of the RMAP commands are designed to meet the requirements of the Space Wire high level protocol RMAP. RMAP user terminal IP core can excute the verification or verification, acknowledge or non acknowledge optional four write operation and a read operation and a read overwrite operation; operation object includes a storage unit, register, FIFO and mail; and the classification defines the bus system implementation process of the erro r types as well as the processing method.Secondly, the adaptive group routing mechanism of Space Wire protocol is analyzed and discussed, a method for Space Wire complex network is introduced, and the performance evaluation mechanism of Space Wire complex network is proposed. Space Wire adaptive group routing is a mechanism to ensure the smooth and redundant access of Space Wire routing units when complex networks are built. In this paper, it discussed the classification of the complex topology network structure based on the dual routing structure, and then evaluated the performance of the complex network. This method can also be used to calculate the optimal performance of the network topology, which provides a theoretical basis for the use of adaptive Space Wire group to build complex networks.Then, based on the performance evaluation method of Space Wire routing network, the architecture of the infrastructure of complex network router is designed, and the IP core of the Space Wire routing unit is realized. According to the requirements of the current satellite electronic system, in the SpaceWire routing unit, set up 8 standard ports, 3 dedicated ports and 1 host specific ports. Including large capacity data channel, broadcast time code control module and support diverse routing and addressing the routing table, the SpaceWire router unit IP core can be used to construct the SpaceWire adaptive group complex network, for network dynamic extension.Finally, the above research results are simulated and verified. Data modeling of Space Wire routing performance evaluation mechanism, through the Monte Carlo simulation method that the effectiveness of the mechanism; build a test platform, the complete test case set for simulation of designed rmap user terminal IP core and Space Wire router can realize the rmap protocol specification operation functions. And the Space Wire routing performance evaluation mechanism is used to select the parameters ratio, to build a better performance of the Space Wire high performance data bus platform.