Research on Low-Overhead User Location Management in Low Earth Orbit Satellite Network
To reduce the signalling overhead of location management caused by the dual mobility of satellite beam cells and users in low earth orbitsatellite networks,a user location management scheme based on an earth-fixed tracking area listis designed.By utilizing the Markov chain to analyze the user location management states and by introducing stochastic geometry theory to estimate the number of paging satellites,a closed-form solution for the signalling overhead of location management in low earth orbit satellite networks is derived.Simulation results show that the proposed location management scheme reduces the overall signalling overhead by 93%compared tothe mobile tracking area-basedlocation management method,by 78%compared tomovement threshold-based location management method,respectively,withan estimation errorfor signalling overhead below 1%.
location managementtracking area listlow earth orbit satellite network
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