The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 11, 2020
Filed:
Aug. 05, 2015
Hohai University, Nanjing, Jiangsu, CN;
Jun Feng, Jiangsu, CN;
Zhixian Tang, Jiangsu, CN;
Zhonghua Zhu, Jiangsu, CN;
Xianyue Zha, Jiangsu, CN;
Bingshuai Du, Jiangsu, CN;
Xiao Xu, Jiangsu, CN;
Chao Wang, Jiangsu, CN;
Yuelong Zhu, Jiangsu, CN;
Shijin Li, Jiangsu, CN;
Dingsheng Wan, Jiangsu, CN;
Hohai University, Nanjing, Jiangsu, CN;
Abstract
A traffic data stream aggregate query method and system includes the steps of acquiring spatial-temporal information of a mobile object to generate a traffic data stream, dividing data space into cells, grouping adjacent cells with similar frequency into few buckets, calculating Kalman gains of the buckets based on frequencies of the buckets, and indexing the buckets using a binary partition tree to form a BPT index of the current timestamp, and serializing the BPT after the end of the current timestamp to form a historical index; and performing aggregate query, wherein an optimum estimation value of the bucket frequency is utilized to replace for calculating when the frequency of the bucket changes a lot. The system includes: an information collection module, a data processing module, an index processing module, an application service module and an index storage module.