PALBS: Preference-Aware Location-based Services

Abstract

This paper presents PALBS, a preferenceaware location-based services system. PALBS provides scalable personalized location-based services to users based on their preferences. Unlike existing location-based service systems that answer queries based solely on proximity in distance, PALBS considers user preferences in determining the answer to location-based queries. To this end, PALBS does not aim to define new location-based queries; instead, it aims to redefine the answer of existing locationbased queries. In this system, user requests the available service via mobile devices and the system return the optimal answers related to user preferences. Within the framework of PALBS, based on simple tree matching, a tree matching method is proposed by analyzing the structure and content of query tree to efficient match and extract user preferences query. And also, the proposed system use a label order rooted tree data structure to efficiently match user preference query based on the user preferences.