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Database Systems: Lecture 13 - Emerging Research Directions in DBs/ISs provides about Mobile Databases, Multimedia Databases, Geographic Information Systems, Bioinformatics, XML, Data Mining, Data Warehousing, Introduction to ASIS Lab. | Emerging Research Directions in DBs/ISs Outline Mobile Databases Multimedia Databases Geographic Information Systems Bioinformatics XML Data Mining Data Warehousing Introduction to ASIS Lab Mobile Databases Recent advances in portable and wireless technology led to mobile computing, a new dimension in data communication and processing. Portable computing devices coupled with wireless communications allow clients to access data from virtually anywhere and at any time. There are a number of hardware and software problems that must be resolved before the capabilities of mobile computing can be fully utilized. Some of the software problems – which may involve data management, transaction management, and database recovery – have their origins in distributed database systems. Mobile Databases(2) In mobile computing, the problems are more difficult, mainly: The limited and intermittent connectivity afforded by wireless communications. The limited life of the power . | Emerging Research Directions in DBs/ISs Outline Mobile Databases Multimedia Databases Geographic Information Systems Bioinformatics XML Data Mining Data Warehousing Introduction to ASIS Lab Mobile Databases Recent advances in portable and wireless technology led to mobile computing, a new dimension in data communication and processing. Portable computing devices coupled with wireless communications allow clients to access data from virtually anywhere and at any time. There are a number of hardware and software problems that must be resolved before the capabilities of mobile computing can be fully utilized. Some of the software problems – which may involve data management, transaction management, and database recovery – have their origins in distributed database systems. Mobile Databases(2) In mobile computing, the problems are more difficult, mainly: The limited and intermittent connectivity afforded by wireless communications. The limited life of the power supply(battery). The changing topology of the network. In addition, mobile computing introduces new architectural possibilities and challenges. Intermittent: khong lien tuc, gia’n doan Mobile Computing Architecture Fixed hosts: Perform the transaction and data management functions with the help of database servers Mobile units: Portable computers, move around a geographical region that is a collection of mobile cells Mobile Computing Architecture(2) It is distributed architecture where a number of computers, generally referred to as Fixed Hosts and Base Stations are interconnected through a high-speed wired network. Fixed hosts are general purpose computers configured to manage mobile units. Base stations function as gateways to the fixed network for the Mobile Units. Data Management Issues From a data management standpoint, mobile computing may be considered a variation of distributed computing. Mobile databases can be distributed under two possible scenarios: The entire
