"Patrick in Paris"
Text in englischImagine Patrick traveling in the center of Paris on the way to the airport armed with his JINI enabled Smart-Phone. He is on a tight schedule and his flight is due to leave in exactly 78 minutes.
His Smart Phone is is contact with the wideband CDMA mobile radio network and is connected with the HeyWow travel planning service on the internet, which has just booked his flight and has guided him to the subway to catch the Metro.. Patrick is also carrying a small satellite navigation receiver which uses the Galileo system to determine his position to within a few meters. HeyWow is also able to address this unit because it is connected to the phone by Bluetooth and is registered on the phone's JINI Lookup Service, which the HeyWow server is able to access. HeyWow tracks Patrick's location and uses its connection to the Paris map internet service to compute instructions and send them to Patrick's phone.
Patrick takes the steps down to the subway hall and his navigation receiver looses the satellites. It removes itself from the phone's lookup service or just waits for the service lease to expire. The phone tells Patrick to find platform 3C and take the next train, since the HeyWow service has found the correct platform and timetable from the Paris public transport internet site. Since there's no navigation service available, it can't tell Patrick exactly how to reach platform 3C, but at least knowing the platform is better than having no information at all!
He gets on the train and his Smart Phone is now in contact with the Metro's Bluetooth terminal which is installed in each carriage and provides internet access. HeyWow also finds the built-in positioning beacon which now provides navigation information and had entered itself on the "walking" lookup service in Patrick?s phone. A few minutes into the journey, the HeyWow server checks Patrick's position and calculates that due to the Metro's delay he will not make it to the airport in time! A recomputation of the best way to get from Patrick's location to the airport, identifies that a taxi is the only safe way. HeyWow tells Patrick to get off the Metro at the next stop, and walk to the surface. As soon as he reaches the exit, a Taxi's radio beacon registers itself with the phone's lookup service. HeyWow finds and invokes this taxi service and thus guides the taxi to the roadside where Patrick is waiting.
Later, when Patrick is safely on the plane, the pilot announces that the flight's arrival will be delayed by half an hour. Patrick opens his Smart-Phone, which now has no access to either a communication link or a navigation service. The applet running on Patrick's phone was smart enough to have downloaded information regarding the next segment of the trip, along with some timetable and route information. It used JINI's Smart Caching to do this. The applet, equipped with a simple route planner, asks Patrick to manually input the new ETA, and informs him that upon arrival he needs to take a rental car instead of the train to make up for lost time. It informs him that it will book and pay for a rental car as soon as a communication link is available at the airport.
Patrick gets in his rental car, and activates the built-in navigation system which immediately takes over the role of the smart phone as the current travel guide. It provides Patrick with accurate directions and routes him around a busy road construction site to his final destination. Later that day, HeyWow checks that his hotel, flight, and rental car use has been credited to his frequent traveler accounts.
