MOBILE DATABASE A mobile database is either a stationary database that can be connected to by a mobile computing device - such as smart phones or PDAs.

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Presentation transcript:

MOBILE DATABASE A mobile database is either a stationary database that can be connected to by a mobile computing device - such as smart phones or PDAs - over a mobile network, or a database which is actually carried by the mobile device. This could be a list of contacts, price information, distance travelled, or any other information. database mobile computingsmart phonesmobile network

MOBILE DATABASE Many applications require the ability to download information from an information repository and operate on this information even when out of range or disconnected. information repository

MOBILE DATABASE Mobile databases are highly concentrated in the retail and logistics industries. They are increasingly being used in aviation and transportation industry.

MOBILE DATABASE An example of this is a mobile workforce. In this scenario, a user would require access to update information from files in the home directories on a server or customer records from a database.home directories

HOME DIRECTORY A home directory is a file system directory on a multi-user operating system containing files for a given user of the system.file system directorymulti-useroperating systemfilesuser

HOME DIRECTORY The specifics of the home directory (such as its name and location) is defined by the operating system involved; for example, Windows systems between 2000 and 2003 keep home directories in a folder called Documents and Settings.Windows

CONSIDERATIONS Mobile users must be able to work without a network connection due to poor or even non-existent connections. A cache could maintained to hold recently accessed data and transactions so that they are not lost due to connection failure.cache

CONSIDERATIONS Users might not require access to truly live data, only recently modified data, and uploading of changing might be deferred until reconnected. Bandwidth must be conserved (a common requirement on wireless networks that charge per megabyte. Bandwidthwireless networksmegabyte

CONSIDERATIONS Mobile computing devices tend to have slower CPUs and limited battery life. Users with multiple devices (ie: smartphone and tablet) may need to synchronize their devices to a centralized data store. This may require application- specific automation features.

CONSIDERATIONS Users may change location geographically and on the network. Usually dealing with this, is left to the operating system, which is responsible for maintaining the wireless network connection.wireless network

MDS capabilities Can physically move around without affecting data availability Can reach to the place data is stored Can process special types of data efficiently Not subjected to connection restrictions Very high reachability Highly portable

MDS Limitations Limited wireless bandwidth Wireless communication speed Limited energy source (battery power) Less secured Vulnerable to physical activities Hard to make theft proof.

MDS Applications Insurance companies Emergencies services (Police, medical, etc.) Traffic control Taxi dispatch E-commerce