Research On Aerospace Internet Application Framework And Key Technologies For Access

With the development of science and technology and the formulation of the "Internet +" action plan,the aviation industry has been continuously promoted with the combination of mobile Internet,big data,cloud computing,and Internet of Things.Therefore,the demand for air cabin passengers on the aircraft has become more and more intense,which has forced China and related enterprises to vigorously research and develop stable access to the cabin Internet.At present,most of China's domestic airlines provide cabin LAN,which can only meet the passengers to open a designated website or entertainment system in the cabin.The development of the aviation cabin Internet wants to realize that passengers can not only access the designated entertainment systems and pages provided by airlines through the on-board wireless network,but also realize the same as the ground Internet.Therefore,this paper takes the application status and framework of the aviation cabin Internet as the research entry point,deeply studies the key access technology of the cabin Internet,proposes the technical optimization scheme,analyzes from the mathematical model and algorithm,and builds the feasibility of the simulation environment to verify the proposed scheme.The main research contents of this article are as follows:1)Research on the application framework of aviation cabin Internet.Through the basic theory of the status quo of aviation cabin Internet applications,from the overall framework of the aviation Internet to the strategic deployment of airlines' commercial business,the construction of mobile base stations in aircraft cabins,the use of 802.11 protocols in aircraft cabins,and the application of WAP website structures in cabins.Other aspects have been explored.2)Research on key technologies for air cabin Internet access.Based on the research of two existing aviation Internet access technologies,ATG(air-to-ground base station)and satellite-based access technologies,the working principle mechanism,advantages and disadvantages,and future challenges are analyzed.3)Design an optimization plan for the key access technology of the aviation cabin Internet.The technology life cycle method is used to find out the problems that restrict the development of key technologies.The optimization schemes for ATG and satellite technology are proposed respectively.The mathematical models and algorithms are designed,and the feasibility of the optimization scheme proposed by the simulation test scenario is built.The innovations and research results of this paper are as follows:1)For the ATG and satellite access technologies,combined with the technology life cycle method to find out the problems existing in the prior art,and propose the optimization of key technologies.The feasibility of the proposed scheme is verified by the combination of mathematical model and algorithm analysis design and simulation test.2)The simulation test of the proposed key technology optimization scheme for aviation internet access is realized.Optimize the Doppler shift frequency offset compensation of ATG technology by adding Doppler Rake technology to improve the system performance of time diversity combination of delayed signals receiving the same signal,and improve the access of ATG technology to wireless networks by adopting MIMO-OFDM coding technology to improve Channel capacity;frequency offset compensation generated by satellite technology by open loop detection combined with PLL pilot tracking.