低轨卫星网络中基于用户位置的位置管理策略  

Location Management Strategy Based on User Location in Low Orbit Satellite Network

作　　者：孙移星 杨波 唐伦[1] 陈前斌[1] SUN Yi-xing;YANG Bo;TANG Lun;CHEN Qian-bin(School of Communication and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;Macro Net Communication Co.,Ltd.,Chongqing 401147,China)

机构地区：[1]重庆邮电大学通信与信息工程学院,重庆400065 [2]东方红卫星移动通信有限公司,重庆401147

出　　处：《计算机仿真》2022年第12期49-58,341,共11页Computer Simulation

摘　　要：低轨卫星运动速度快,移动终端相对卫星驻留时间短,如何有效地管理终端的位置信息,减少位置更新开销和寻呼开销是位置管理的主要目的。提出一种基于用户位置信息的位置管理策略。首先提出一种基于用户自身地理位置信息的动态位置区划分方案,再提出一种寻呼卫星及点波束确定算法,并搭建位置管理系统级仿真平台,最后针对具有不同移动特性的终端设置不同的位置更新半径进行仿真。仿真结果表明,该策略通过对不同移动特性的终端用户设置合适的位置更新半径,可以有效地减小位置管理开销。The low-orbit satellites move fast, and the mobile terminals have a short residence time relative to the satellites. How to effectively manage the location information of the terminals and how to reduce the location update overhead and paging overhead are the main purpose of location management. This paper proposes a location management strategy based on the location information of users. Firstly, this paper put forward a dynamic location area division scheme based on the users’ own geographic location information. Then, a paging satellite and spot beam determination algorithm was proposed, and a location management system-level simulation platform was built. Finally, for terminals with different mobile characteristics, different position update radii were set for simulation. Simulation results show that this strategy can effectively reduce location management overhead by setting appropriate location update radii for end users with different mobile characteristics.

关 键 词：低轨卫星通信系统 位置管理策略 寻呼 开销 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]