Links assignment scheme based on potential edges importance in dual‐layer wavelength routing optical satellite networks

Summary

With the development of the massive satellite constellation and the on‐orbit laser‐based communication equipment, wavelength routing optical satellite networks (WROSN) becomes a potential solution for on‐orbit, high‐capacity, and high‐speed communication. Since the inter‐satellite links (ISLs) are time‐varying, one of the fundamental considerations in the construction of the WROSN is assigning limited laser communication terminals for each satellite to establish ISLs with the visible satellites. Therefore, we propose a links assignment scheme (LAS) based on the potential edges importance matrix (PEIM) algorithm to construct a temporarily stable topology for a dual‐layer WROSN (DWROSN). The simulation results showed that the LAS based on the PEIM algorithm diminishes the long‐hops route path, reduces the average node‐to‐node distance, and saves the wavelength demand of the DWROSN. The node pair connectivity and wavelength demand in the DWROSN is a trade‐off problem. The research in this paper also brings a novel method for optimizing the route paths and reducing the wavelength demand of wavelength routing optical satellite networks, that is through designing the topology with a links assignment algorithm.