ACCESS VIA WAP:
Customer calls originating from mobile device, it crosses WAP gateway-dial in hardware and finally reaches the application server. Three Servlet are implemented such as Registration, Login and Shop. The Controllers are Registration controller, 2 Login controllers, one is PC specific and another one is device specific. The whole process is very similar to MVC pattern.
ACCESS FROM PDAs:
The same order processing is done from PDAs which will follow the same MVC pattern and secure pervasive infrastructure. The device specific capabilities of PDAs demand special attention to the layout and design of web pages, or the tool and formats used by client application. Three implementation are layered. Necessary support will be given for accessing from PDAs.
Pervasive computing refers to the ubiquitous presence of computing in both mobile and embedded environments, with the ability to access and update information anywhere, anyplace and anytime. This idea has been around for a long time, but only now is pervasive computing truly taking root.