高速铁路场景移动通信系统切换研究综述

Mobile Communications Handover Schemes in High-Speed Railway Scenario

高铁的高速、全封闭特性给移动通信系统的越区切换性能带来了极大挑战,直接影响用户体验。阐述了移动通信系统中越区切换的概念,并指出高速铁路场景下越区切换面临的问题。回顾了国内外为解决这些问题所进行的相关研究及最新进展,包括网络架构优化和切换流程中测量、参数设置、执行策略、数据传输环节的优化,并指出群切换机制是未来值得关注的研究方向。

The fast and fully-enclosed high-speed train brings a big challenge to the performance of handover in mobile communication systems,thus resulting in a direct influence on user experience. Firstly,the concept of handover in mobile communication system is discussed,and the confronted problems by handover in high-speed railway scenario are also presented. Then,the latest developments on how to solve the problem both at home and abroad are reviewed,including the optimization of network architecture and the optimization of measurement,parameter setting,executive stratagy,data transfer in handover process. And finally this paper proposes that group handover scheme is a future research direction deserving of public attention.