Author:
Chen Zi,Feng Bo,Yuan Long,Lin Xuemin,Wang Liping
Abstract
AbstractIn the real world, road networks with weight and label on edges can be applied in several application domains. The shortest path query with label restrictions has been receiving increasing attention recently. To efficiently answer such kind of queries, a novel index, namely Contraction Hierarchies with Label Restrictions (CHLR), is proposed in the literature. However, existing studies mainly focus on the static road networks and do not support the CHLR maintenance when the road networks are dynamically changed. Motivated by this, in this paper, we investigate the CHLR maintenance problem in dynamic road networks. We first devise a baseline approach to update CHLR by recomputing the potential affected shortcuts. However, many shortcuts recomputed in baseline do not change in fact, which leads to unnecessary overhead of the baseline. To overcome the drawbacks of baseline, we further propose a novel CHLR maintenance algorithm which can only travel little shortcuts through an update propagate chain with accuracy guarantee. Moreover, an optimization strategy is presented to further improve the efficiency of index maintenance. Considering the frequency of edge changes, we also propose a batch index maintenance algorithm to handle batch edge changes which can process a large number of edge changes at once. Furthermore, a parallel method is proposed to further accelerate calculations. Extensive and comprehensive experiments are conducted on real road networks. The experimental results demonstrate the efficiency and effectiveness of our proposed algorithms.
Publisher
Springer Science and Business Media LLC
Subject
Computer Science Applications,Artificial Intelligence,Information Systems,Software
Reference40 articles.
1. Abraham I, Delling D, Goldberg AV, Werneck RFF (2011) A hub-based labeling algorithm for shortest paths in road networks. In: Proceedings of SEA vol 6630, pp 230–241
2. Akiba T, Iwata Y, and Yoshida Y (2013) Fast exact shortest-path distance queries on large networks by pruned landmark labeling. In: SIGMOD 349–360
3. Anirban S, Wang J, Islam MS, Kayesh H, Li J, Huang ML (2022) Compression techniques for 2-hop labeling for shortest distance queries. WWW 25(1):151–174
4. Buchhold V, Sanders P, Wagner D (2019) Real-time traffic assignment using engineered customizable contraction hierarchies. ACM J. Exp. Algorithmics 24(1):2.4:1-2.4:28
5. Chen Y, Perera L, Thompson RG (2018) An advanced method to provide best route information in city logistics with toll roads. In: ATRF
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