基于DSPN的高速磁浮运控系统越区切换模型

曹源; 张玉琢; 马连川; 孙雅晴; 穆建成

基于DSPN的高速磁浮运控系统越区切换模型

1.
北京交通大学轨道交通运行控制系统国家工程研究中心, 北京 100044
2.
北京交通大学电子信息工程学院, 北京 100044
3.
上海自仪泰雷兹交通自动化系统有限公司, 上海 201206
4.
国家铁路局科技与法制司, 北京 100891

基金项目:

国家863计划项目 2012AA112001

国家自然科学基金项目 51305021

国家自然科学基金项目 U1334211

中国铁路总公司科技研究开发计划项目 2013X013-D

详细信息

作者简介:
曹源(1982-), 男, 河南开封人, 北京交通大学讲师, 工学博士, 从事列车运行控制系统研究

中图分类号: U283
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- 被引次数: 0
出版历程
- 收稿日期: 2013-12-08
- 刊出日期: 2014-04-25

Handoff model of operation control system of high-speed maglev based on DSPN

1.
National Engineering Research Center of Rail Transportation Operation and Control System, Beijing Jiaotong University, Beijing 100044, China
2.
School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing 100044, China
3.
Thales Saic Transportation System Limited Company, Shanghai 201206, China
4.
Department of Science-Technology and Law, National Railway Administration of the People's Republic of China, Beijing 100891, China

More Information

Author Bio:
CAO Yuan (1982-), male, lecturer, PhD, +86-10-51688537, ycao@bjtu.edu.cn

摘要

摘要: 考虑38GHz毫米波通信中断与信道占用因素, 依据磁浮运控系统越区切换流程建立了确定与随机Petri网(DSPN) 模型, 对单一移动终端(MT) 和冗余MT两种结构进行了比较, 研究了基站间距和列车运行速度对单一MT和冗余MT两种结构越区切换可靠性的影响。研究结果表明: 冗余MT越区切换性能明显优于单一MT, 后者的停车概率约为前者的3×10⁴倍; 越区切换成功率随列车运行速度的提高而降低, 随基站间距的减小而降低; 在极端情况下, 即列车以500km·h^-1运行, 且相邻基站间距为500m, 冗余MT和单一MT越区切换成功率只有98.50%和97.85%。研究结论为磁浮运控系统车地通信子系统的服务质量优化与移动小区设置提供了依据。
- 列车运行控制系统 /
- 越区切换 /
- 确定与随机Petri网 /
- 高速磁浮 /
- 车地通信 /
- 可靠性
Abstract: Considering the factors of the communication outage of 38GHz millimeter wave and channel occupancy, deterministic and stochastic Petri nets model (DSPN) was developed based on the handoff process of maglev operation control system.The structures of single mobile terminal (MT) and redundant MT were compared.The effects of base station interval and train running velocity on the handoff reliabilities of single MT and redundant MT were investigated.Investigation result indicates that the handoff performance of redundant MT is significantly higher than that of single MT, the parking probability of single MT is approximate 3×10⁴ times of that of redundant MT.The handoff success rate reduces with the increase of train running velocity and the decrease of base station interval.In the special case, in which the train running velocity is 500 km·h^-1 and the base station interval is 500 m, the handoff success rates of redundant MT and single MT are only 98.50% and 97.85% respectively. Research result provides basis for the QoS optimization of train-ground communication subsystem in maglev operation control system and mobile cell setting.
- train operation control system /
- handoff /
- DSPN /
- high-speed maglev /
- train-ground communication /
- reliability

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图 1 越区切换场景

Figure 1. Handoff scenarios

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图 2 DSPN中的元素

Figure 2. Elements of DSPN

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图 3 单一MT越区切换DSPN模型

Figure 3. Handoff DSPN model of single MT

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图 4 冗余MT越区切换DSPN模型

Figure 4. Handoff DSPN model of redundant MT

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图 5 越区切换成功率与基站间距的关系

Figure 5. Relationship between handoff success rate and base station interval

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图 6 越区切换成功率与列车运行速度的关系

Figure 6. Relationship between handoff success rate and train running velocity

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图 7 停车概率与基站间距的关系

Figure 7. Relationship between parking probability and base station interval

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表 1 库所与变迁的意义

Table 1. Significances of places and transitions

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表 2 指数变迁和确定变迁取值

Table 2. Values of exponential transitions and deterministic transitions

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表 3 瞬时变迁的哨函数

Table 3. Guard functions of immediate transitions

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