Pervasive Computing
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computer science crazy
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#1
21-09-2008, 10:33 AM


Definition
Pervasive computing refers to embedding computers and communication in our environment. Pervasive computing provides an attractive vision for the future of computing. The idea behind the pervasive computing is to make the computing power disappear in the environment, but will always be there whenever needed or in other words it means availability and invisibility. These invisible computers won't have keyboards or screens, but will watch us, listen to us and interact with us. Pervasive computing makes the computer operate in the messy and unstructured world of real people and real objects. Distributed devices in this environment must have the ability to dynamically discover and integrate other devices.

The prime goal of this technology is to make human life more simple, safe and efficient by using the ambient intelligence of computers. Pervasive computing environments involve the interaction, coordination, and cooperation of numerous, casually accessible, and often invisible computing devices. These devices will connect via wired and wireless links to one another as well as to the global networking infrastructure to provide more relevant information and integrated services. Existing approaches to building distributed applications, including client/server computing, are ill suited to meet this challenge. They are targeted at smaller and less dynamic computing environments and lack sufficient facilities to manage changes in the network configurations.

Networked computing devices will proliferate in the user's landscape, being embedded in objects ranging from home appliances to clothing. Applications will have greater awareness of context, and thus will be able to provide more intelligent services that reduce the burden on users to direct and interact with applications. Many applications will resemble agents that carry out tasks on behalf of users by exploiting the rich sets of services available within computing environments.

Mobile computing and communication is one of the major parts of the pervasive computing system. Here data and computing resources are shared among the various devices. The coordination between these devices is maintained through communication, which may be wired or wireless. With the advent of Bluetooth and Ad hoc networking technologies the wireless communication has overtaken the wired counter part.The reduction in size and cost of processor chips made it possible to implement it in every field of life. Nowadays about 99% of processors made are for embedded devices compared to the PC applications. Voice and Gesture recognition along with steerable interface will make the interactions and use of these devices more user friendly. Efficient security and privacy policies along with power management can enhance the performance of such systems.

Current Embedded Technology
Embedded technology is the process of introducing computing power to various appliances. These devices are intended to perform certain specific jobs and processors giving the computing power are designed in an application oriented way.
Computers are hidden in numerous information appliances which we use in our day-to- day life. These devices find there application in every segment of life such as consumer electronics, avionics, biomedical engineering, manufacturing, process control, industrial, communication, defence etc?

Embedded systems, based on there functionality and performance requirement are basically categorized as:
i. Stand alone systems
ii. Real time systems
iii. Networked systems
iv. Mobile devicesz
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rohit khandelwal
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#2
06-02-2011, 02:33 PM

please give me the ppt and report of pervasive computing at rohitkhandelwal138@yahoo.co.in
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seminar addict
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11-02-2012, 12:56 PM

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seminar flower
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#4
01-06-2012, 03:25 PM

PERVASIVE COMPUTING


.pdf   PERVASIVE COMPUTING.pdf (Size: 1.79 MB / Downloads: 31)

Ubiquitous Computing

Ubiquitous, Invisible Computing (Mark Weiser [1]) : Computers disappear into the background.
Computers embedded in walls, in tabletops, and in every day objects
A person might interact with hundreds of computers at a time, each invisibly embedded in the environment and wirelessly communicating with each other.

The “Personal Motor”

Popular at turn of 20th Century
One motor and lots of “peripherals”: washing machine, woodworking tools, sewing machine, grain milling
System of belts and pulleys to distribute motive power
Similar to the PC situation today
Intel, Microsoft like it this way

Pervasive Computing

A computing environment that seamlessly and ubiquitously supports users in accomplishing their tasks and that renders the actual computing devices and technology largely invisible [5].
Environments created when computing power and network connectivity are embedded in virtually every device humans use. Anytime/anywhere, any device, any network, any data [4].
Computation is freely available everywhere, like batteries and power sockets. Anonymous devices, either handheld or embedded in the environment, will bring computation to us, no matter where we are or in what circumstances. These devices will personalize themselves in our presence by finding whatever information and software we need [18].

Pervasive Computing (2)

Device as portal / Application as task / Physical surroundings as computing Environment [2]
- A device is a portal into an application/data space.
- An application is a means by which a user perform a task,
not a piece of software to exploit a device‟s capability.
- The computing environment is the user‟s information-
enhanced physical surroundings, not a virtual space to
store and run software.

Discovery Protocols

“Spontaneous” discovery and configuration of network devices and services
Selection of specific types of service
Low (preferably no) human administrative requirements
Automatically adaptation to mobile and sporadic availability
Interoperability across manufactures and platforms
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