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Cyberguide : A mobile context-aware tour guide

Cyberguide : A mobile context-aware tour guide. G. D. Abowd ,C. G. Atkeson, J. Hong, S. Long, R. Kooper and Mike Pinkerton, in Wireless Networks -- presented by Yu-Chee Tseng --. Introduction. mobile application should be contextural-aware be aware of user’s current position

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Cyberguide : A mobile context-aware tour guide

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  1. Cyberguide : A mobile context-aware tour guide G. D. Abowd ,C. G. Atkeson, J. Hong, S. Long, R. Kooper and Mike Pinkerton, in Wireless Networks -- presented by Yu-Chee Tseng --

  2. Introduction • mobile application should be contextural-aware • be aware of user’s current position • be aware of user’s current orientation • history • Cyberguide project at GIT: • to explore context-aware mobile applications for future computing environments • to develop an intelligent handheld tour guide

  3. Introduction (cont.) • Short-term goal : • fast prototyping a context-aware tourguide based on PDA and pen-based PC • Long-term goal: • know where tourist is, and what she is looking for • predict and answer question she may pose • provide interaction with other people and environment

  4. Future Mobile Context-Aware Tourguides • should be handheld • has a screen, with pen/finger input interface • storage (e.g., CD drive) • communication device (e.g., to access Web) • audio I/O: speech generation and speech recognition • video I/O: display information and for videotaping • can receive information anywhere • Wearable computing

  5. Future Mobile Context-Aware Tourguides (cont.) • positioning system: • outdoor: GPS (global positioning system) • indoor: infrared beacon • object of interest should be marked (say, with active beacons) • provide route planning and travel direction • multi-lingual dictionary • as a travel agent: to make reservation and to find shortest path

  6. Future Mobile Context-Aware Tourguides (cont.) • a heads up display • to provide “X-ray” vision of an architecture • electronic tour diary: • videotaping • user commentary on a map • recording the trace of tour on a map • group interaction: • to exchange touring experience • to steer a demo • to vote for some group decision

  7. Architecture of Cyberguide • Cartographer: • map component • has knowledge of physical surroundings • Librarian: • information component • provide access to information about sights that a tourist might encounter • Navigator: • to chart the position of the tourist • Messenger: • wireless communication component

  8. The Indoor Cyberguide • Apple MessagePad 100 with Newton 1.3 • Map component • a map of entire GVU (GIT’s Graphic, Visualization, & Usability) Center • Fig. 1 (left) • automatic scrolling • zoom in, zoom out • stars: to show user’s position and demonstration stations

  9. The Indoor Cyberguide (cont.) • Information component • information about each demo site at the GVU center • Fig. 1 (right) • select star icon to reveal its name and the information therein • can search for specific information pages

  10. The Indoor Cyberguide (cont.) • Communication component • Appletalk connection a Unix Appletalk Gateway • support TCP/IP packets • HTML • send/receive emails • Fig. 2 (for users to complete a questionnaire)

  11. The Indoor Cyberguide (cont.) • Positioning component: to sense the user’s current position • GPS:signals are too weak or not available in indoors • RF : too expensive • infrared IR: low-cost and convenient • IR is selected for indoor usage: (Fig. 3) • a array of TV remote control (hanging from ceiling ) • each sends out unique beacons (cell ID) periodically through IR 40kHz • IR receiver • controlled by Motorola 68332 • Keeping track of last recorded cell location provides a good guess to predicate user’s orientation

  12. Extending to Outdoor Cyberguide • out-door positioning: • replace IR module with a Trimble GPS unit • Fig 4.: Georgia Tech campus • map: • pixel: easier to obtain • vector-based map: more difficult to implement • arbitrary scaling and rotation • platforms • pen-based PC • Windows CE 1.0

  13. Fig. 5: map interface • history: visited places are checked • can generate a summary of today’s visited cites

  14. Fig. 6: information browser • serve as an electronic tour guide

  15. Fig. 7: communication device (through IR) to connect to their departmental network, and then to Internet

  16. wireless communication for email: Fig. 8

  17. broadcasting from the backbone network: Fig. 9

  18. Extending to Outdoor Cyberguide (cont.) • Increase interaction with environment • visitor can keep record of her experiences • user-modifiable database • CyBARguide: Fig. 10 • multiple maps at varying levels of details • automatically choose the map with the highest details

  19. Future work • modifiable information database • inclusion of digital camera • increased communications • higher speed (say, through wireless modem) • web-based browsing • Improved context awareness • where is other tourists, knowing user’s reaction ... • use of computer vision • multimedia support

  20. Conclusions • prototyping of a context-aware mobile application for tourguide • help to clarify some signification research issues in mobile computing

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