China Mobile China Satellite Network Group ZTE This document proposes a dynamic routing mechanism for Low Earth Orbit(LEO) satellite networks based on geographic region coding. By decoupling IP addressing from physical location, the mechanism uses hierarchical geographic grid codes (inspired by Uber's H3 spatial index) as temporary IP addresses for satellites. Routing decisions are made based on the relative geographic position encoded in the destination address, rather than traditional prefix-based IP routing. Satellite ephemeris data is leveraged to pre-compute routing tables for discrete time slices, eliminating the need for real-time link- state flooding and enabling stable, predictable routing in highly dynamic satellite topologies.