Mobile distributed real time database systems: A research challenges

Morden Electronics devices and electronic commerce applications characterized by high volume of transactions can´t survive without an online support of computer system and database technology. It gave birth to distributed real-time database systems, a new form of distributed database system, in which, transactions have deadlines or timing constraints. Again, the rapid growth in Mobile Computing Technology has provided a new platform for Distributed Real Time Database Systems (DRTDBS). DRTDBS are becoming ubiquitous and critical component in mobile environment today. More recently, it emerges as mobile real time database systems (MDRTDBS) in the world of lightweight intelligent devices like palmtops, cellular phones, car computers, smart cards etc. Processing of transaction with mobility as well as time constraints has opened up a new area of research with a number of design issues such as network connectivity, storage capacity, scheduling, data consistency, data replication & distribution, concurrency control & commit processing, reliability, security, economical aspect etc. In fact, this paper first discusses the performance issues that are important to MDRTDBS, and then surveys the research that has been done so far. In fact, this study provides a foundation for addressing performance issues important for the management of very large mobile real time data and pointer to other publications in journals and conference proceedings for further investigation of unanswered research questions.