Improving Survivability of LEO Satellite Network with Guaranteed Based Approaches

Low Earth Orbit (LEO) satellite network is experiencing renewed interest due to its potential to revolutionize wide-area communications. However, it may suffer different failure modes than many traditional networks given its location in the complex space environment. In this paper, we address this problem by focusing on the survivability of LEO satellite network under link failures. Specifically, we investigate two kinds of guaranteed based approaches to solve this problem and combine them in a uniform framework using optimization method, e.g., linear programming: 1) protects against any combination of up to k concurrent link failures, for a configurable value k; 2) enables guarantees such as "user i is guaranteed b i network bandwidth at least β% of the time". Simulation on up-to-date mega-constellation show that our proposed framework can protect delay-sensitive traffic from suffering long delay or data loss. In addition, they can support more traffic demands for the specified level of availability (e.g., 90%) under link failures.