低轨卫星网络中基于用户分组与主动资源预留的切换技术研究OA

With the continuous expansion of low-orbit satellite constellations and the increasing complexity of user service demands,the frequency of handovers and the efficiency of resource scheduling in satellite networks have become key factors constraining system performance.This paper addresses the high-frequency handover scenarios in large-scale low-orbit satellite networks and proposes a handover process and resource scheduling mechanism oriented toward user groups.Firstly,by introducing an Adaptive Time-window Group Management mechanism(ATGM),the scale of user groups is dynamically adjusted to enhance handover efficiency.Secondly,a Latency-Bound Resource Allocation Mechanism(LBRAM)is designed to optimize on-board resource utilization.Finally,through system modeling and simulation validation,the proposed mechanisms outperform traditional schemes in multiple aspects,including inter-satellite signaling overhead,handover success rate,and latency.Specifically,they can reduce inter-satellite handover signaling overhead by up to 31.3%,consistently maintain the handover success rate above 99%,and lower the average handover delay by approximately 8.8 milliseconds,demonstrating strong potential for engineering applications.