Disconnection Tolerance in Soft Real-Time Mobile Databases

摘要

Many current applications widely use wireless technologies where mobile hosts communicate with fixed base stations thanks to wireless communications. These applications have often real-time constraints. The main problem is then to efficiently manage transactions despite the network disconnections. In this paper, we study the problem of insuring computing continuity of query real-time transactions in spite of the disconnection problems. To this purpose, we develop a protocol, called DT-protocol, where are taken into account the frequent disconnections of the wireless network. We show, through simulations results, that DT-protocol brings a value added in the management of query transactions in wireless environment.