Research Of AOS Multi-source Link-layer Send Simulation Systems Based On HLA-RTI

AOS has advantage including high flexibility and diversification etc. So it has become the research hotspot in the space link field. With the depth study of AOS theory, the corresponding system simulation technology is becoming important increasingly. In many simulation techniques, because HLA-RTI can achieve interoperability between different simulation systems, reusable, and the members of the "plug and play", that can well simulate AOS source types more, large data capacity, as well as multi-level data processing etc. Therefore, in this study, carried out the research of AOS multi-source link layer sending simulation system based on HLA-RTI, the main contents are as follows:Firstly, based on the analysis of the AOS agreement and data processing. AOS multi-source link layer send simulation were overall designed based on HLA-RTI. The simulation system can transmit five kind sources, including the 8-bit little source, 16-bit little source, text source, image source, and sound source. In the design, using the modular thinking, design four members of the simulation system, including master control member, multi-source package member, the virtual channel scheduling member and additional frame synchronization mark(ASM) add member, and complete the function in two computers. Design VC6.0 and RTI software configuration, and give the federal functional design and methods of communication interface design.Secondly, design and implement each member module function of the sender.The first step, design and implement the master control member module, its function is to control the start of the simulation system; The second step, design and implement the multi-source package member module, including packet channel multiplexing module and BPDU package module, five kind sources were packaged; The third step, design and implement the virtual channel scheduling member module, in the module, using static priority scheduling algorithm complete scheduling; The fourth step,design and implement the additional frame synchronization mark(ASM) add member module, in the module, using three different frame synchronization code as best ASM, to adapt the frame synchronization requirements of different communication environments.Then, on the basis of the above work, realized the interconnection between the various members of the module, and after commissioning and running, complete system simulation, simulation results response AOS data processing and related properties truly and accurately.