Data in Your Space (DAYS)

We define the space as ``persistent data storage", which conforms to essential database characteristics such as consistency, recoverability, and security. From the user point of view it allows information access, information modifications, and information storage without spatial and temporal constraints. Thus, a user can access necessary information, deposit important information for future use, communicate with other users, etc, without any restriction. In this paper we present our approach for using the space as persistent data storage. Figure 1 illustrates our vision of information space. Every component, static or mobile, is connected with another component and any component can establish communication with other components anytime and can access, deposit, and manipulate desired data concurrently along with other activities. This can serve as global yellow pages and navigational system. Our objective is to provide necessary data and its modification capability to static (bank, lighthouse, etc.) as well as to mobile (human, airplane, ship, etc.) users through broadcast. Broadcast approach has been in use for sometime, however, its full potential has yet to be utilized. We argue that DAYS significantly enhances the scope of broadcast technology without creating mismatch with traditional approaches. We call our system DAYS. We visualize DAYS space through wired and wireless channels. The wireless connectivity manages the front-end (user level) data processing activities and the wired channels manage background activities such as database updates, recovery, concurrency control, etc.