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Erschienen in:
2010 | OriginalPaper | Buchkapitel
Moving Objects Updating
verfasst von : Jidong Chen, Xiaofeng Meng
Erschienen in: Moving Objects Management
Verlag: Springer Berlin Heidelberg
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In moving objects applications, large numbers of locations can be sampled by sensors or GPS periodically, then sent from moving clients to the server and stored in a database. Therefore, continuously maintaining in a database the current locations of moving objects by using a tracking technique becomes very important. The key issue is minimizing the number of updates, while providing precise locations for query results. In this chapter, we will introduce some underlying location update methods. Then, we describe two location update strategies in detail, which can improve the performance. One is the proactive location update strategy, which predicts the movement of moving objects to lower the update frequency; the other is the group location update strategy, which groups the objects to minimize the total number of objects reporting their locations.