高速客运通信系统中的动态资源预留  

Dynamic Resource Reservation in High-Speed Transportation Communication System

作　　者：柴蓉[1] 唐伦[1] 肖敏[1] 陈前斌[1] 

机构地区：[1]重庆邮电大学,重庆400065

出　　处：《电信科学》2009年第10期48-51,共4页Telecommunications Science

基　　金：重庆市科委自然基金资助项目(No.8477);重庆市新世纪优秀人才支持计划基金资助项目(No.NCET-06-0778);国家科技重大专项基金资助项目(No.2008ZX03003-005);重庆市自然科学基金资助项目(No.2009BB2083)

摘　　要：针对高速客运系统中用户频繁切换产生的大量资源开销,引入了组移动性概念,通过设置列车中继站,实现了车内用户的单用户切换方式。同时,针对大量用户同时切换至目标基站导致的基站拥塞,提出了基于基站协作的动态资源预留方案。即当前基站根据列车运行状态信息提前获知切换目标基站,并通告其资源需求,使其为车内用户预留资源。仿真结果表明列车业务量对系统性能产生了严重影响,采用动态资源预留方案,可以有效地提高列车用户的通信性能。To solve the performance deterioration problem of cellular system under high mobility, the application of a train relay station which performs single-user handoff scheme is proposed. Moreover, a dynamic resource reservation scheme based on base station cooperation is presented. Current base station obtains the information of destination base station based on train state information and notifies it to reserve resource for train users. Simulation results show that train communication load affects system performance seriously and performance can be improved significantly through dynamic resource reservation.

关 键 词：蜂窝通信 中继站 基站协作 资源预留 

分 类 号：TN914[电子电信—通信与信息系统] TP393.4[电子电信—信息与通信工程]