TY  - JOUR
T1  - Handover Optimization Method for Cross-Seam in LEO Satellite Based on Orbital Information
AU  - Chu, Heonwoo 
AU  - Moon, Taehan 
AU  - Kim, Tae-Yoon 
AU  - Jeong, Hanjin 
AU  - Song, Yongmin 
AU  - Kim, Jae-Hyun 
JO  - The Journal of Korean Institute of Communications and Information Sciences
PY  - 2025
DA  - 2025/1/1
DO  - 10.7840/kics.2025.50.10.1536
KW  - LEO Satellite Network
KW  - Handover
KW  - Walker-Star Constellation
AB  - In the cross-seam of a LEO (low Earth orbit) satellite network, when a handover occurs between satellites in adjacent orbits, the absence of inter-plane ISLs (inter-satellite links) can lead to increased handover interruption time and routing instability. In this paper, we propose a method to reduce handover interruption time and routing instability in LEO satellite network in cross-seam regions, where ISLs between adjacent orbits are unavailable. The proposed handover method calculates the central longitude of the cross-seam using satellite orbital information and conducts handovers based on this longitude, minimizing changes in the orbits of the previously connected and newly connected satellites during cross-seam handover. Simulation results show that the proposed handover method reduces handover interruption time in the cross-seam.