Location based services in mobile environments have been recognized as a challenging problem that calls for new service models and dynamic strategies. The problem becomes even harder when not only the clients but also the data sources can move. We tackle the problem by providing a general service architecture that facilitates the employment of mobile codes. We then device a concise but effectiv...

Recent technological developments in the area of mobile devices in combination with the ubiquity of mobile connectivity have turned handheld devices into rich mobile web clients. On the other hand, we witness an increased number of web resources that are no longer only available in HTML but also in RDF format. In order to access relevant information in a mobile setting, we often want to query a...

Several applications use devices and capture systems to record trajectories of mobile objects. To exploit these raw trajectories, we need to enhance them with semantic information. Temporal, spatial and domain related information are fundamental sources used to upgrade trajectories. The objective of semantic trajectories is to help users validating and acquiring more knowledge about mobile obje...

The use of mobile applications is increasing rapidly. Particularly, mobile applications for decision support systems, such as mobile datawarehouses, are very attractive. However, mobile application imposes new requirements such as disconnection from the data sources. These requirements force the use of incremental update algorithms in order to update the mobile hosts. In this paper, we extend t...

Mobile IP protocols use a correspondent registration procedure between a Mobile Node (MN) and its Correspondent Nodes (CNs) to maintain a valid and up-to-date binding association between MN’s home address and its current care-ofaddress whenever a handover occurs. This procedure plays a key role in optimizing the routing path between the two parties by avoiding any kind of dog-leg routing across...

The demand of mobile technology is growing and mobile information services including the gathering of information and manipulating them are also becoming more critical in the world of mobile technology. These allow mobile users to download useful data, possibly from multiple sources. In this article, we introduce two basic mobile query processing, namely: (i) mobile device side processing (MDSP...

The demand of mobile technology is growing and mobile information services including the gathering of information and manipulating them are also becoming more critical in the world of mobile technology. These allow mobile users to download useful data, possibly from multiple sources. In this article, we introduce two basic mobile query processing, namely: (i) mobile device side processing (MDSP...

Mobile applications are growing fast due to pervasive usage of mobile devices. With inherently limited on-device resources, plenty of research has been conducted on job partitioning/outsourcing strategies to execute mobile computing tasks on external sources, such as public clouds or nearby computers. However, little is known about the performance difference to mobile users on these external co...