Network Capacity Model and Constraint Analysis of Dynamic Space-Based TT&C Network

Space-based TT&C network is a satellite network with dynamic topology. How to make space-based TT&C network run more efficiently is challenging. In order to reveal the internal relationship between satellite nodes and between satellite and ground user nodes in space-based TT&C network and give a general law, the network capacity of space-based TT&C network is studied in this paper. Firstly, according to the characteristics of nodes and links in space-based TT&C network, a network capacity model for time-varying space network is proposed. The model describes and constrains the network capacity model from four aspects: path availability, transmission rate, path planning strategy and path reliability. Then, the change trend of network capacity of space-based TT&C network is analyzed. Through simulation analysis, the possibility of optimizing the control networking strategy of space-based TT&C network is pointed out.