Essay --

Mobile Distributed Information System Fundamentals and Architecture of Mobile Distributed Information System Q1. What is a mobile distributed information system? Answer. In today's mobile society, access to relevant information and to context-specific services "anytime, anywhere" is becoming increasingly important. This is the environment for our research, development and consulting activities in selected current topics of Mobile Distributed Information Systems. Mobile users are often particularly interested in information about and services in their immediate vicinity, thus Mobile Distributed Information Systems must address location-dependent distribution of and access to services and information from mobile devices. The user's topological and geographical location becomes relevant for the semantics of communication, and such communication has to remain seamless even in foreign environments, with little or no need for manual reconfiguration. Frequently, in addition to his locat ion, the user's current situation determines his information and service requirements. With mobile devices becoming more and more powerful, mobile users themselves may offer information and services to peers in an improvised manner. As a result, the long-established distinction between clients and servers is blurred, which calls for an extension of the architecture prototype towards peer and/or alternating roles. (Reference from http://www.wkap.nl/prod/b/0-7923-9697-9) Recent years have witnessed a rapid proliferation of mobile information devices. Cellular phones have become not only a basic means of communication for many people, but have also developed from simple telephones suitable only for voice communications into computing devices capable of t... .../Preference Profiles (CC/PP) profile can be used to provide a description of mobile device. Different MSS are in different heterogeneous network and these MSS need to cooperate and communicate with each other for exchanging data. A standard interface is needed between MSS. Java technologies or a middleware like CORBA can be used to solve the heterogeneous problems. (Reference from www.idi.ntnu.no/emner/dif8914/essays/hien-essay2001.pdf ) References http://www.wkap.nl/prod/b/0-7923-9697-9 www.autospaces.com/people/fsommers/mobile_transactions.pdf www.idi.ntnu.no/emner/dif8914/essays/hien-essay2001.pdf George Coulouris, Jean Dollimore, Tim Kindberg Distributed Systems: Concepts and Design. M. Tamer Ozsu, Patrick Valduriez Principles of Distributed Database Systems Prentice Hall 1999. George H. Forman, John Zahorjan The Challenges of Mobile Computing.