26-03-2012, 04:49 PM
UBIQUITOUS COMPUTING
Ubiquitous computing.ppt (Size: 349 KB / Downloads: 124)
Is also known as pervasive computing.
Refers to use of computers in everyday life.
New Type of relationship between peoples and computer
Includes PDAs, smart phones and other devices.
Will become a larger part of our social lives.
System Architecture for Ubiquitous Computing
Increase in hardware and network infrastructure.
Major focus on Users & there tasks.
Lack of applications in existing systems.
Architecture needs to :
be simple
integrate support for mobile computations and persistent storage.
be easy to encapsulate.
Dependable pervasive systems
Dependability is the ability of a system to avoid failures
Three basic concepts – failure, error and fault
Failure is judged by some other system
Failure is a recursive notion
Error is liable to lead to failure but it may or may not
Security and trust issues in ubiquitous environments
Security implies protecting corporate resources against threats and attacks.
Security goals includes:
Access control
Data confidentiality and integrity
Availability of services
Accountability of actions
Various solutions that are used includes:
Firewalls
Virtual private network
Terms Related to Ubiquitous Computing
Wearable Computing:
Always on and always accessible.
Should be worn like a piece of clothing.
Could be a communications device or a recorder.