A New Data Communication Protocol for Distributed Mobile Databases in Mobile Ad Hoc Networks

Three data communication methods can be provided in a MANET: data broadcast, data query, and peer-to-peer messaging. The formation of heterogeneous distributed mobile databases within a MANET that allows people to submit queries is becoming a reality. The goal of this paper is to integrate distributed mobile databases in MANETs and proposes a new data communication protocol that supports all three modes of data communication in the network region and allows mobile applications to view these separate non identical databases as one integrated database. This protocol adjusts node disconnection and reconnection through periodic synchronization. In this distributed database framework mobile servers comprise Data Directories (DDs) that gather and store the schemas of mobile databases running on detected mobile devices in the service cycle. DDs inform the requesting node whether a submitted query is answerable from participating mobile database nodes or not. Also this protocol allows mobile nodes of the architecture to exchange messages for the purpose of executing the submitted query against the distributed mobile database and then returning the results.