Using multi-level graphs for timetable information in railway systems

被引:0
|
作者
Schulz, F
Wagner, D
Zaroliagis, C
机构
[1] Univ Konstanz, Dept Comp & Informat Sci, D-78457 Constance, Germany
[2] Univ Patras, Inst Comp Technol, Patras, Greece
[3] Univ Patras, Dept Comp Engn & Informat, Patras, Greece
来源
ALGORITHM ENGINEERING AND EXPERIMENTS | 2002年 / 2409卷
关键词
D O I
暂无
中图分类号
TP301 [理论、方法];
学科分类号
081202 ;
摘要
In many fields of application, shortest path finding problems in very large graphs arise. Scenarios where large numbers of on-line queries for shortest paths have to be processed in real-time appear for example in traffic information systems. In such systems, the techniques considered to speed up the shortest path computation axe usually based on precomputed information. One approach proposed often in this context is a space reduction, where precomputed shortest paths are replaced by single edges with weight equal to the length of the corresponding shortest path. In this paper, we give a first systematic experimental study of such a space reduction approach. We introduce the concept of multi-level graph decomposition. For one specific application scenario from the field of timetable information in public transport, we perform a detailed analysis and experimental evaluation of shortest path computations based on multi-level graph decomposition.
引用
收藏
页码:43 / 59
页数:17
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