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Paper Abstract and Keywords
Presentation 2015-08-06 11:00
Safe-Region Generation Method for Vicinity Queries in Road Network Distance
Yutaka Ohsawa, Htoo Htoo (Saitama Univ.) DE2015-15
Abstract (in Japanese) (See Japanese page) 
(in English) This paper proposes a fast safe-region generation method for several
kinds of vicinity queries including distance range queries, set k
nearest neighbor (NN) queries, and ordered kNN queries. When a user
is driving a car on a road network, he/she wants to know objects
located in a vicinity of the car. However, the result is changing
according to the movement of the car, and therefore, the up-to-date
result is always expected, and requested to the server. On the other
hand, frequent requests for updating results to the server cause heavy
loadings. To cope with this problem efficiently, the idea of
safe-region has been proposed. This paper proposes a fast generation
method of the safe-region applicable to several types of vicinity
queries. Through experimental evaluations, the proposed algorithm
achieves less than a tenth processing time comparing to existing
Keyword (in Japanese) (See Japanese page) 
(in English) continuous queries / moving objects / trip planning queries / route search / road network / / /  
Reference Info. IEICE Tech. Rep., vol. 115, no. 177, DE2015-15, pp. 61-66, Aug. 2015.
Paper # DE2015-15 
Date of Issue 2015-07-29 (DE) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF DE2015-15

Conference Information
Conference Date 2015-08-05 - 2015-08-06 
Place (in Japanese) (See Japanese page) 
Place (in English) Todaiji Culture Center 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Management, Information Retrieval, Knowledge Discovery, etc. 
Paper Information
Registration To DE 
Conference Code 2015-08-DE-DBS-IFAT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Safe-Region Generation Method for Vicinity Queries in Road Network Distance 
Sub Title (in English)  
Keyword(1) continuous queries  
Keyword(2) moving objects  
Keyword(3) trip planning queries  
Keyword(4) route search  
Keyword(5) road network  
1st Author's Name Yutaka Ohsawa  
1st Author's Affiliation Saitama University (Saitama Univ.)
2nd Author's Name Htoo Htoo  
2nd Author's Affiliation Saitama University (Saitama Univ.)
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Speaker Author-1 
Date Time 2015-08-06 11:00:00 
Presentation Time 30 minutes 
Registration for DE 
Paper # DE2015-15 
Volume (vol) vol.115 
Number (no) no.177 
Page pp.61-66 
Date of Issue 2015-07-29 (DE) 

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