Satellite-Borne Distributed Location Management Scheme in Mega LEO Satellite Networks

Mega low earth orbit (LEO) satellites provide seamless global coverage, which pose a great challenge to location management (LM) due to the high-speed movement of satellites. In this letter, we design a distributed location management (SDLM) scheme with location management centers (LMCs) deployed onboard LEO satellites. We propose an enhanced binary bi-velocity particle swarm optimization (EBBV-PSO) algorithm to solve the LMC deployment problem. Additionally, we introduce a concept of dynamic tracking area (DTA) and derive its optimal radius explicitly. Simulation experiments demonstrate that the proposed SDLM scheme outperforms traditional LM schemes in terms of paging delay and LM overhead.