Location management in pervasive systems (original) (raw)
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A Java-Based Programming Language Support of Location Management in Pervasive Systems
2008
In this paper, we present an effort towards incorporating programming language support for pervasive systems development activities through extending on an already existing and stable programming language, namely Java. Pervasive systems research indicated the need for five main cornerstone features in support for conducting efficient pervasive systems development activities, namely programming language support for context, location, actors, sensors, and events. Herewith this article, we illustrate how we utilized the extensible markup language (XML), along with the Jini Javaspace technology, access rights definition, as well as supporting libraries to incorporate the representation and management of location in pervasive systems development activities. Beyond presenting the details of this approach, we demonstrate an actual example showing how location topology can be defined, along with their associated fine-grain access rights, how such topology can be stored and retrieved from Javaspaces, how the Javaspaces themselves can be managed, and how to query for location information taking into consideration the enforcement of defined rules for access rights to various locations.part of summary.
Location Centered Application for Advanced Pervasive Computing Strategies
IAEME PUBLICATION, 2015
Now days there are several mobile phones are introduced with Global Positioning System(GPS) outstanding to growing location knowledge, the background position alert application is well thoughtout to be the innovative one in cellular mobile phones. However enhancement gets across original face. The cellular data network provide broadband speed and constrained piece of equipment source such as battery existence, but it restore bandwidth as a most important restrictive feature for mobile phone application. Developing location-aware structural design requires smart customers for lowlatency synchronized applications and well-organized administration of piece of equipment material goods, at the same time as server-side cleverness to investigate long-ago consumer performance. This manuscript swells earlier work on place-aware architectures and current place-Aware Information method customer (LAISYC), a complete place-aware structure supporting clever synchronized mobile phones applications.
Positioning support in pervasive environments
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In order to implement reactive and proactive functionalities in a pervasive environment, contextual data must be processed. One of the most important features of the context is the position of the users and the devices. In this paper, we describe a method to determine the position of a WiFi enabled device. The prediction is based on the signal strength of the available access points. The prediction model is built from a database containing the signal strength measured in some known locations. The result is the name of the room/office where the device is localised. We also present a usage scenario, in which the user/device position is used to start proactive actions in our pervasive service environment called PerSE.
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Continuous location-dependent queries are key elements for the development of location-based and contextaware services. While most works on location-dependent query processing have been mainly oriented towards outdoor environments, this paper develops an approach for the continuous processing of location-dependent queries over indoor moving objects. A prototype for handling those queries has been developed as an extension for the open source DBMS PostgreSQL. Several algorithms for the continuous processing of path searches and range queries applied to both static and moving objects are performed on top of a hierarchical and context-dependent data model. Experimental results have been conducted to report our findings.
Location service in mobile computing environments
1996
With the advent of mobile computing devices and cheap location sensing systems, location information has become an important resource both for mobile and 'desktop users'. In this paper, we describe some key concepts a scaleable ubiquitous location service should be based on. Firstly, we show how such a service can accommodate multiple location sensing systems. Secondly, we discuss hierarchy-based access control policies as a flexible and powerful mechanisms to protect users' privacy. Thirdly, we address some issues concerning the visualisation of location information.
Information Management for Location Aware Applications
2001
Within the scope of the research project NEXUS that is being worked on at the University of Stuttgart in cooperation between the Institute for Photogrammetry, the Institute of Parallel and Distributed High-Performance Systems and the Institute of Communication Networks and Computer Engineering, a generic platform supporting location aware applications with mobile users will be developed. In order to facilitate the
2012
Context and context-awareness are crucial concepts in pervasive computing. Among the many and diverse types of contextual information, information about location is generally seen as one of the most important. There is a great deal of situations the users happen to be in throughout a pervasive environment. This fact imposes restrictions on the use of the available resources and the surroundings as well as requires taking into account the users‟ personal preferences and requested customisations.
Experiencing location aware systems: a case study
In this paper, we identify practical and technical issues that we experienced during designing and experimenting a location aware system. Our system was designed using the Spot location aware system and the Event Heap server under the TeamSpace framework. We conducted a series of test runs of the application with developers, using wireless mobile devices such as the HP IPAQ 5500. From our experience, it shows that currently the Spot system is not viable enough for designing an imminent location aware application. Finally, this paper concludes with general remarks about how our findings and recommendations can be taken into account for the improvement of the Spot system and consequently for similar location-aware systems.
Data Management Issues and Technologies for Location-Aware Computing
2003
Modern applications pose high quality requirements with respect to the type of processing needed and the expected system performance. A modern research direction is location-aware computing, which aims at providing services to users taking into consideration the location of the user in space. In order for location-aware computing to be feasible, several data management issues must be addressed. Geographical data