摘要
为了探讨现有GSM-R铁路移动通信系统越区切换的信息中断问题,对基于OFDM-SFCN(orthogonal fre-quency division multiplexing-single frequency cell network)的铁路移动通信同步单频蜂窝网(OFDM-SFCNR)系统越区性能进行了深入的实验研究.实验表明,与GSM-R相比,OFDM-SFCNR不仅可以减少列车的通信数据中断次数,而且能有效降低通信的掉话概率,增强铁路通信的可靠性.显示了OFDM-SFCNR在通信掉话率和阻塞率等越区性能方面具有一定优势.
To discuss the problem of train＇s information interrupt when handovers occur in railway mobile communication system-GSM-R nowadays,a research is carried out on the performance of handovers in the railway mobile synchronous communication net with single frequency cell（OFDM-SFCNR） which is based on OFDM-SFCN（orthogonal frequency division multiplexing-single frequency cell network）.Experiment suggests that,compared with GSM-R,OFDM-SFCNR can not only reduce the times of train＇s communication data interrupt,but also effectively reduce the dropping probability in the communication process,so it can enhance the reliability of the railway communication.It is indicated that OFDM-SFCNR has great advantage in the performance of communication handover by lowering the dropping probability and the blocking probability.
出处
《应用科技》
CAS
2011年第2期27-31,共5页
Applied Science and Technology
关键词
铁路通信
正交频分复用
单频蜂窝网
越区切换
railway communication
orthogonal frequency division multiplexing（OFDM）
single frequency cell network（SFCN）
handovers
