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A Hybrid Spatio-Temporal Data Indexing Method for Trajectory Databases
In recent years, there has been tremendous growth in the field of indoor and outdoor positioning sensors continuously producing huge volumes of trajectory data that has been used in many fields such as location-based services or location intelligence. Trajectory data is massively increased and seman...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2014
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4168421/ https://www.ncbi.nlm.nih.gov/pubmed/25051028 http://dx.doi.org/10.3390/s140712990 |
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author | Ke, Shengnan Gong, Jun Li, Songnian Zhu, Qing Liu, Xintao Zhang, Yeting |
author_facet | Ke, Shengnan Gong, Jun Li, Songnian Zhu, Qing Liu, Xintao Zhang, Yeting |
author_sort | Ke, Shengnan |
collection | PubMed |
description | In recent years, there has been tremendous growth in the field of indoor and outdoor positioning sensors continuously producing huge volumes of trajectory data that has been used in many fields such as location-based services or location intelligence. Trajectory data is massively increased and semantically complicated, which poses a great challenge on spatio-temporal data indexing. This paper proposes a spatio-temporal data indexing method, named HBSTR-tree, which is a hybrid index structure comprising spatio-temporal R-tree, B*-tree and Hash table. To improve the index generation efficiency, rather than directly inserting trajectory points, we group consecutive trajectory points as nodes according to their spatio-temporal semantics and then insert them into spatio-temporal R-tree as leaf nodes. Hash table is used to manage the latest leaf nodes to reduce the frequency of insertion. A new spatio-temporal interval criterion and a new node-choosing sub-algorithm are also proposed to optimize spatio-temporal R-tree structures. In addition, a B*-tree sub-index of leaf nodes is built to query the trajectories of targeted objects efficiently. Furthermore, a database storage scheme based on a NoSQL-type DBMS is also proposed for the purpose of cloud storage. Experimental results prove that HBSTR-tree outperforms TB*-tree in some aspects such as generation efficiency, query performance and query type. |
format | Online Article Text |
id | pubmed-4168421 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2014 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-41684212014-09-19 A Hybrid Spatio-Temporal Data Indexing Method for Trajectory Databases Ke, Shengnan Gong, Jun Li, Songnian Zhu, Qing Liu, Xintao Zhang, Yeting Sensors (Basel) Article In recent years, there has been tremendous growth in the field of indoor and outdoor positioning sensors continuously producing huge volumes of trajectory data that has been used in many fields such as location-based services or location intelligence. Trajectory data is massively increased and semantically complicated, which poses a great challenge on spatio-temporal data indexing. This paper proposes a spatio-temporal data indexing method, named HBSTR-tree, which is a hybrid index structure comprising spatio-temporal R-tree, B*-tree and Hash table. To improve the index generation efficiency, rather than directly inserting trajectory points, we group consecutive trajectory points as nodes according to their spatio-temporal semantics and then insert them into spatio-temporal R-tree as leaf nodes. Hash table is used to manage the latest leaf nodes to reduce the frequency of insertion. A new spatio-temporal interval criterion and a new node-choosing sub-algorithm are also proposed to optimize spatio-temporal R-tree structures. In addition, a B*-tree sub-index of leaf nodes is built to query the trajectories of targeted objects efficiently. Furthermore, a database storage scheme based on a NoSQL-type DBMS is also proposed for the purpose of cloud storage. Experimental results prove that HBSTR-tree outperforms TB*-tree in some aspects such as generation efficiency, query performance and query type. MDPI 2014-07-21 /pmc/articles/PMC4168421/ /pubmed/25051028 http://dx.doi.org/10.3390/s140712990 Text en © 2014 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/). |
spellingShingle | Article Ke, Shengnan Gong, Jun Li, Songnian Zhu, Qing Liu, Xintao Zhang, Yeting A Hybrid Spatio-Temporal Data Indexing Method for Trajectory Databases |
title | A Hybrid Spatio-Temporal Data Indexing Method for Trajectory Databases |
title_full | A Hybrid Spatio-Temporal Data Indexing Method for Trajectory Databases |
title_fullStr | A Hybrid Spatio-Temporal Data Indexing Method for Trajectory Databases |
title_full_unstemmed | A Hybrid Spatio-Temporal Data Indexing Method for Trajectory Databases |
title_short | A Hybrid Spatio-Temporal Data Indexing Method for Trajectory Databases |
title_sort | hybrid spatio-temporal data indexing method for trajectory databases |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4168421/ https://www.ncbi.nlm.nih.gov/pubmed/25051028 http://dx.doi.org/10.3390/s140712990 |
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