Mobile handhelds like Smart Phones are usually permanent attendants in everyday life. They offer per se flexible means of communication in our society, whereby many services are complementing the conventional voice telephony. The data throughput and the accessibility of the mobile Internet through Cellular Networks and Public Hotspots is steadily increasing. Ubiquitous mobility has a high significance today, both for business processes and consumer applications. The processing of dynamic environmental parameters like the device's geodetic position enables in this context a variety of user-aware services.
Furthermore, a deployment of services across temporal and spatial bounderies allows a flexible interaction with arbitrary data by incorporating multiple networks.
This master's thesis initially supplies a technical roadmap to get aware of the peculiarities of mobile platforms, wireless network infrastructures and positioning techniques. The aim is an efficient utilization of Operator- as well as Internet- and Device-based services on resource-limited mobile devices. Furthermore, foreseeable technological enhancements for realizing Pervasive Computing in future setups are discussed. Subsequently, technical issues regarding application architecture and implementation are outlined based on a working prototype. The prototype realizes a Mobile Blogging Application. This application represents a distributed Java-based software system including mobile and static components. Blogs are created on handhelds and consist of a Photo, a Message as well as information about Location and Time of the blog creation. Additional information like Elevation Levels, logical Location Information, and covered Distances can be obtained easily.
These geotagged blogs are available for a subsequent manipulation and exploration in a mobile context. A Blogging Service gives the mobile user the opportunity to transfer these user-centric blogs to an Application Server. The blogs are thereby accessable through a web-based cartographic Interface. The access to the created and posted blogs is under full control of the content owner. The annotations within a virtual map through blog-related Waypoints enable an expressive representation of distinct activities. The application scenarios are thus mainly in the tourism sector, but also in the research sector in cases where a location-based Documentation of artifacts seems to be useful. Many Frameworks and Tools are available for the mobile application developing process to extend the standard functionality of platforms. In the prototype implementation, a deployment of such a framework increases the usability and improves the code maintainability as well as the debugging process.