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一种基于道路网络的移动目标数据库模型.pdf

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1000-9825/2003/14(09)1600 ©2003 Journal of Software 软件学报 Vol.14, No.9 ∗ 一种基于道路网络的移动目标数据库模型 + 于秀兰 , 陈滢, 丁晓诚, 刘东 ( 国际商业机器中国有限公司研究中心,北京 100085) A Moving Object Database Model Based on Road Network + YU Xiu-Lan , CHEN Ying, DING Xiao-Cheng, LIU Dong (Research Laboratory, International Business Machines China Company Limited, Beijing 100085, China) + Corresponding author: Phn: 86- 10ext 512, Fax: 86-10 E-mail: yuxl@ /research Received 2002-08-06; Accepted 2003-03-04 Yu XL, Chen Y, Ding XC, Liu D. A moving object database model based on road network. Journal of Software, 2003,14(9):1600~1607. /1000-9825/14/1600.htm Abstract: An important feature that differentiates moving object database (MOD) from other databases is that MOD can support queries for locations recorded not only at the sample time, but also at time between samples and even at time in the future. The most important issue in MOD research is to build models of moving objects’ mobility and their locations update. The advance in mobile Internet and location-based services requires appropriate models be built for popular dumb terminals, such as cell phones, which can only be located by auxiliary facilities like GSM/CDMA networks. Considering that users of such kind dumb devices often move on the road network, a novel model for these moving objects to calculate their velocities in the past and future and to update their locations with varied sample time based on road network is presented in this paper. Compared with traditional velocity models, the proposed model can reduce the location prediction errors effecti