  With the proliferated low-Earth-orbit (LEO) satellites in
mega-constellations, the future Internet will be able to reach any place on
Earth, providing high-quality services to everyone. However, high-quality
operations in terms of timeliness and resilience are lacking in the current
solutions. This paper proposes a multi-layer networking approach called
"Cross-Layer Descent (CLD)". Based on the proposed system model, principles,
and measures, CLD can support foundational services such as telecommand (TC)
transmissions for various network operation missions for LEO satellites
compliant with the Consultative Committee for Space Data Systems (CCSDS)
standards. The CLD approach enhances timing and resilience requirements using
advanced communication payloads. From the simulation-based analysis, the
proposed scheme outperforms other classical ones in resilience and latency for
typical TC missions. The future work and conclusive remarks are discussed at
the end.
