In the past decade, positioning system-enabled devices such as smartphones have become
most prevalent. This functionality brings the increasing popularity of location-based services …

In this paper, we study the problem of continuous monitoring of reverse k nearest neighbors
queries in Euclidean space as well as in spatial networks. Existing techniques are sensitive …

In this paper, we propose an efficient hierarchical index, G*-tree, to optimize spatial queries
on road networks. Most existing graph indexes can only support one kind of query, and thus …

With the development of GPS-enabled mobile devices, more and more pieces of information
on the web are geotagged. Spatial keyword queries, which consider both spatial locations …

Modern navigation systems do not only provide shortest paths but also some alternative
paths to provide more options to the users. This paper is the first to study the problem of …

Route planning over dynamic road networks is an increasingly fundamental problem of
modern transportation systems for human society, especially in the field of Intelligent Supply …

Given a set of objects and a query q, a point p is called the reverse k nearest neighbor (R k
NN) of q if q is one of the k closest objects of p. In this paper, we introduce the concept of …

In this paper, we introduce MobIoT, a service-oriented middleware that enables large-scale
mobile participatory sensing. Scalability is achieved by limiting the participation of redundant …

Abstract Location-Based Services (LBSs) are attracting great interest nowadays, mainly due
to the economic value they can provide. So, different applications are being developed for …

This article addresses the MaxRS (Maximizing Range Sum) monitoring problem. Given a set
of weighted spatial stream objects, this problem is to monitor a location of a user-specified …