30-07-2012, 12:42 PM
MOBILE COMPUTING
MOBILE COMPUTING.ppt (Size: 1,013.5 KB / Downloads: 35)
About Mobile Computing
Special class of distributed systems
Deals with the mobility of hardware, data and software in computer application
Nodes can disengage from joint operations move freely in physical space and reconnect to possibly different segment of computer network.
Goal of Mobile Computing
To permit user and program to be more
and more effective in an Environment that is characterized by uncertain connectivity and Heterogeneity without changes to the manner in which they connect.
Mobile Computing Applications
Information about hotels ,restaurant and local data about a locality.
Information about roads and street in firefighter vehicles.
An employee can connect to his company server while mobile and do his work in this way productivity increases
ADAPTABILITY IN MOBILE COMPUTING
APPLICATION –TRANSPARENT ADAPTATION .
The system automatically handles changes in connectivity between hosts, and transparently decides when to propagate updates or invalidate and re-fetch stale data. Individual applications have no say in how to make use of available bandwidth etc.
LAISSEZ-FAIRE ADAPTATION
In such systems Application monitors the availability of resource and are solely responsible for coping with the consequences of mobility
Impact Of Wireless Communication
The New Networking Technologies Allow Spontaneous Connectivity Among Mobile Devices.
Mobile Devces Can Become Both Source And Consumer Of The Information .There Is No Longer Distinction Between Clients And Server Instead Devices Are Now Peer.
Devices Must Be Able To Cooperate With Others In Their Proximity In Order To Pursue Individual And Collective Tasks.
Conclusion
Mobile computing is the future vision of the world.
As information can be accessed from anywhere, and from any terminal the need of more effective evaluation, has appeared.
Query processor should have a flexible architecture to adapt device capabilities and heterogeneity.