重庆邮电大学学报（自然科学版）2019，Vol.31Issue(1)：57-64,8.DOI:10.3979/j.issn.1673-825X.2019.01.008
基于功率-距离的LTE-R切换算法优化研究
Research on optimization of LTE-R handover algorithm based on power distance
摘要
Abstract
The traditional long term evolution-railway (LTE-R) handover algorithm for selection of handover can not adapt well to the high speed train movement, and the handover hysteresis is likely to result in more handover failures, impairing the train operation control and the wireless communication experience of passengers. On the other hand, when trains pass through a community at high speed, the requirements for handover are more stringent, and the problem of simplifying the signaling flow and achieving rapid handover needs to be solved urgently. Thus, a handover optimization scheme based on power and distance is proposed to reduce inaccurate handover and achieve fast handover. Not only the influence of speeds on handover parameters is taken into full consideration, but the distance and power are also taken into account in the optimizational algorithm. Only when the train reaches a certain trigger position can the trigger judgment be made, and the switch is carried out when the power condition is satisfied. The proposed algorithm avoids early error triggering of the train and discards the time to trigger (TTT), so the rapid handover can be achieved within one measurement cycle. The simulation results show that the suggested scheme can better ensure the handover success rate in high speed environment.关键词
长期演进的铁路移动通信系统(LTE-R)/高速移动/快速切换/切换成功率Key words
LTE-R/high speed movement/fast handover/handover success rate分类
信息技术与安全科学引用本文复制引用
陈永刚,杜涛,王攀琦,戴乾军..基于功率-距离的LTE-R切换算法优化研究[J].重庆邮电大学学报（自然科学版）,2019,31(1):57-64,8.基金项目
国家自然科学基金地区科学基金 (61763023) （61763023）
