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With the rapid advancement of aerospace technology and satellite internet, high-speed and high-bandwidth satellite communication systems have gradually become an essential component of the next-generation mobile communication infrastructure.The trend in the development of satellite internet has propelled the commercialization process of satellite networks, with low earth orbit satellites playing a significant role in constructing satellite internet.The efficient and reliable network management of large-scale low earth orbit satellite networks, along with the integration of space and ground routing, has gradually emerged as a cutting-edge issue in the development of integrated aerospace networks.In recent years, as satellite networks have expanded in scale, numerous network management methods have been proposed.Firstly, begined by examining the development status of large-scale satellite constellations both domestically and internationally, surveying the existing network architecture and protocol systems of various satellite networks.Subsequently, based on the current development status of large-scale satellite networks, the challenges and key technologies involved in satellite management were analyzed.Finally, built upon the network integration of space and ground, existing solutions were extensively researched and analyzed.

The void phenomenon behind the tunnel lining has become the main cause of tunnel disease, easily triggering tunnel lining structure damage, shedding, water seepage, and other diseases that seriously threaten the normal operation of the tunnel. The void area behind the lining seriously reduces the seismic capacity of the tunnel. In this paper, the mechanical parameters of the surrounding rock are calculated by optimizing the inversion of the improved system identification sensitivity analysis method, and the numerical model of the tunnel’s dynamic response is optimized using the improved inversion results to study the repair effect and seismic capacity of the Longmenshan tunnel using polymer grouting to repair the void area behind the lining under the action of a seismic load. The results show that the displacement and stress at the top of the tunnel secondary lining void area are significantly reduced and close to normal after the repair of polymer grouting; however, the stress and displacement at the top of the secondary lining are significantly different under the action of seismic waves at the same peak at different site conditions, which indicates that the dynamic response of this tunnel model has obvious sensitivity to the seismic wave spectrum.