摘要
随着高速铁路的不断发展和列车速度的不断提高,高铁场景下车地通信的可靠性和高效性引起广泛关注。列车速度的提升导致更加频繁的越区切换,使系统的可靠性得不到保障,因此列车速度的提升对高铁通信网络的安全性和可靠性产生严重影响。本文提出1种将LTE-A(Long Term Evolution-Advanced)网络应用到高速铁路场景并基于协同多点传输/接收CoMP(Coordinated Multi-Point transmission/reception)技术的切换优化方案模型,方案参考协作集加入模型。对系统切换成功率等进行性能分析,并与传统切换方案进行性能对比。分析表明:本文基于CoMP的切换方案可有效提升高移动性下网络的切换成功概率,明显改善系统的可靠性和效率。
Along with unceasing development of high-speed railways and continual raising of train speeds worldwide, the reliability and efficiency of ground-to-train communication in circumstances of high-speed railways attract wide public attention. Upgrading of train speeds brings about frequent handover so that system reliability cannot be guaranteed. Therefore upgrading of train speeds makes a tremendous impact on the safety and reliability of high-speed railway communication networks. In this paper, the handover optimizing scheme model was established by applying the LTE-A （Long Term Evolution-Advanced） network in high-speed railway communication and on the basis of the CoMP （Coordinated Multi-Point transmission/reception） technology. The model of coordination set was taken into account. The handover performance was analyzed and compared with the traditional handoff scheme. The results show that the CoMP-based handover scheme heightens the handover success probability effectively in high mobility, so the reliability and efficiency of ground-to-train communication networks are improved obviously.
出处
《铁道学报》
EI
CAS
CSCD
北大核心
2013年第4期57-65,共9页
Journal of the China Railway Society
基金
国家自然科学基金(61071108
61032002)
中央高校基本科研业务费专项资金(SWJTU09ZT14)
关键词
高移动性
LTE-A
切换
COMP
切换成功率
中断率
high-speed railway
LTE-A
handover
CoMP
handover success probability
outage probability
