GMR-1卫星通信系统中基于判决的切换算法

发布时间：2018-07-31 18:18

【摘要】：在卫星移动通信系统中,卫星和用户都处于运动中,当用户穿越波束边界时需要进行切换。切换是卫星移动通信系统中重要的组成部分,切换算法的好坏直接影响移动通信质量。在无线资源受限的卫星移动通信系统中,不必要的切换会造成系统资源浪费。地面和卫星移动通信存在差异,地面移动通信系统中的越区切换算法在卫星移动通信网络中不再适用。针对现有波束切换算法在切换判决时没有考虑当前链路质量,提出一种基于判决的卫星波束切换算法。该算法根据当前链路质量动态地调整切换迟滞值参数的变化,并为不同速度的用户设置不同的切换触发时间。仿真结果表明,与现有的卫星点波束切换算法相比,所提算法能够合理地触发必须切换,避免不必要的切换,从而降低网络的乒乓切换和切换失败率。
[Abstract]:In the satellite mobile communication system, both the satellite and the user are in motion. Handoff is an important part of satellite mobile communication system. The quality of mobile communication is directly affected by the handoff algorithm. In satellite mobile communication systems with limited wireless resources, unnecessary switching will cause waste of system resources. There are differences between ground and satellite mobile communications, and the handoff algorithm in terrestrial mobile communication systems is no longer applicable in satellite mobile communication networks. In view of the fact that the current link quality is not taken into account in the existing beam-switching algorithms, a decision based satellite beam-switching algorithm is proposed. The algorithm dynamically adjusts the parameters of handoff hysteresis according to the current link quality and sets different switching trigger times for users with different speeds. The simulation results show that compared with the existing satellite spot beam switching algorithms, the proposed algorithm can reasonably trigger the necessary handoff and avoid unnecessary handoff, thus reducing the ping-pong handoff and handoff failure rate of the network.
【作者单位】：重庆邮电大学移动通信技术重庆市重点实验室;
【基金】：国家科技重大专项课题(2013ZX03006005) 国家高技术研究发展计划资助项目(863计划)(2015AA01C303) 长江学者和创新团队发展计划资助(IRT1299)~~
【分类号】：TN927.23

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