This paper describes RoF techniques and RoF system,basing on the basic principles to introduce the application of RoF communication system in the high-speed rail system＇s covering program.Although RoF is effective in reducing the switching frequency,but it can not guarantee that switched request is successed to access every time,this paper proposes a dynamic channel reservation handoff algorithm,which is described in detail,and analyzes a mathematical model of the algorithm,the algorithm can make the handoff blocking rate controled in the following standard indicators,in order to ensure the communication quality of server.%在阐述RoF技术和RoF系统基本原理的基础上,介绍RoF系统在高速铁路通信系统中覆盖方案的应用.RoF系统在高速铁路通信系统覆盖方案中虽能有效减少切换次数,但不能保证每次切换请求的成功接入.针对这一问题,文章提出并详细介绍了动态信道预留切换算法,分析了该算法的数学模型,结果表明,该算法可以使越区切换阻塞率控制在标准指标以下,从而保证通信服务质量.
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