Research And Simulation Of The Aerospace Integrated Information Network Management

The AIIN(Aerospace Integrated Information Network) was the intelligent system that was composed of large amount of constellations of satellites and the ground supporting system. It would be the backbone of the battle information system in the future. The AIIN was a complex system which consists of multifarious equipments, and all the equipments had different controlling parameter and status information. It was a great challenge to manage the AIIN and the traditional TT&C and operation management was not suitable.The goal of this thesis was to research the architecture and the key technology of the AIINMS(Aerospace Integrated Information Network Management System). The AIIN is a kind of new concept satellite network, which is still in conceptual research and flying test period. The research of the network management of AIIN should be proceeding of the constructing of it. The methodology of this thesis was promoting the integrated simulating and prototyping architecture, which consist of a prototype of the management system of the AIIN and a ground space network emulating environment. The principal question was to prompt the function model and the information model of the AIINMS according the aerospace property and the managing criterion of the AIIN. Then, to test and verify the prototype of AIINMS, we developed a ground space emulating environment to act as the managing object of the AIINMS prototype. Upon the emulating environment, the function model and the managing workflow could be tested and verified. The software and arithmetic of the AIINMS and the onboard agents could be migrated to the network built in the future with lest cost. The main aspects of thesis included as follows:1,A hierarchical architecture of the managing domain based aerospace integrated information network management system(AIINMS) inherited from the architecture of the Intemet/SNMP and OSI network management standard was presented. In AIINMS we extended the definition of the function model and the information model, and introduced HSNMP as the management protocol according the aerospace property of the aerospace network. Based on the difmation of AIINMS, a prototype of the Aerospace Integrated Information Network Management System which was composed of the ground management center, the onboard local management station and the onboard agents was developed. The AIINMS could perform performance managing, configure managing, fault managing, resource managing and secure managing. Upon the emulation environment of the AIIN, the main functions of AIINMS prototype was tested, which include the automatic topology detecting, the performance monitoring and forecasting, the fault detecting and the partition of the managing domain.2,A framework of the network measurement and traffic forecasting was researched in this thesis. In the AIIN, the resource managing was significant to the space mission, so the management center should monitor the status of the network resource allocating and the load of the backbone nodes that were used to make forecasting. In the framework, the network status was measured and transmitted to the management center using SNMP packet data units. Then the real-time data, together with the historical data was processed as a time series, which was wavelet transformed with a trous algorithm. The transformed detail coefficients and final smoothed signal then were put into the neural networks to perform the m-steps short time prediction. The prediction framework was simulated in our constellation networks emulating environment and the analysis was described in the article.3,An emulating environment for network management of the space network was present in this paper. The emulating environment was developed with node-link model. The nodes of the satellite entities were controlled by the controlling network, which consist of sets of RTI/HLA based federates. These federates described the different aspect of the attributes of the satellites, such as orbit coordinate, routing table and the chain budget. In this article we described the architecture of the emulating environment and the software design of federates. The higher layer application such as network management system could run upon the emulating environment, and perform management as it was the real space networks. The environment was open that the on-board router and the simulator of satellite link which developed by third parties could be integrated.4,A framework of background traffic generating in the emulating of AIIN was developed in this thesis. The purpose of this article is to generate the background traffic in the simulation of the low earth orbit constellation networks. It is difficult to generate traffic based on measurement because that the low earth orbit satellites network was still under developed. The traffic was generated according the fractal shot-noise-driven Poisson process. The shape of the shots is determined by the protocol information and the network dynamics, such as the transport control protocol, the traffic control arithmetic, the RTT of the ISLs and the BER. The advantage of such method is that we could generate traffic by analytics model, and can use different shot shapes to model flows having different dynamics. Another advantage is that the shots could capture all moments of the traffic, not only its variance or autocorrelation. In this article we analysis the TCP protocol worked in satellites network, such as SCPS-VJ, to derive the shot shape of the single long-lived flow, then use fractal shot noise driven Poisson process to generate the aggregated traffic.