The application model based on Petri net in location-based service

Just in a few decades, the rapidly developed wireless networks and the intelligent information systems popularity had so dramatically changed our daily lives. From the view of the ubiquitous computing, which context and ambient awareness [5]respected omnipresent computing allow users to receive the location corresponded and suitable information at any time in anywhere through portable computing device[6], combined with varieties of mature wireless communication technology, that also provide a novel Edutainment model for users. In this thesis, we try to establish a diverse and high scalability of the ubiquitous navigation and learning environment, comply nowadays ubiquitous services with Petri net, that enrich human-computer interaction, and makes ours leisure activities more diversify and adaptive.[4][7] From researchers' studies we found that the task-based navigation mode hint one's self-challenge, via the internal interaction model of the task that aspired users' imagination, curiosity and joy, as well as through immediate reward feedback mechanism, competitive and adventure elements, which also passionate users are willing to concentrate their effort tasks. Thus, by introducing the task elements will be much benefit in leisure and learning navigation field.