Submitted by: Submitted by taree
Views: 188
Words: 1289
Pages: 6
Category: Science and Technology
Date Submitted: 05/30/2012 07:39 AM
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Mobile Computing
Mobile Computing
• Migration is important for survival. • Mobility originated from the desire to move either toward resources or away from scarcity. • Mobile computing about both physical and logical computing entities that move. • Physical entities are computers that change locations • Logical entities are instances of a running user application or a mobile agent. • Mobile agents can migrate any where over internet. • But active applications can only move to a local cluster of computers.
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Department of C S E
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R. K. Ghosh
CSE 100, April, 2005
1 of 19
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Mobile Computing
Buzzwords
• Mobile, ubiquitous, nomadic, untethered, pervasive and any time, any where, any person computing are used by researchers to refer to computing that uses small portable devices and wireless communication n/w. • Nomadic computing refer to limited migration. – Migration is within a building at a pedestrian speed. – Interleaved pattern of user relocation and indoor connections • In the same vein, users carrying laptop with DIAL-UP modems are engaged in nomadic computing.
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Department of C S E
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R. K. Ghosh
CSE 100, April, 2005
2 of 19
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Mobile Computing
Buzzwords
• Mobile computing requires – wireless n/w to support outdoor mobility and handoff from one n/w to the next at a pedestrian or vehicular speed. • Traveler in car using laptop connected with a GSM phone – engaged in mobile computing. • Ubiquitous computing or pervasive computing refers to access to computer network all the time at any location by any person. • Ubiquitous computing can not be realized unless mobile computing matures.
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Department of C S E
!
R. K. Ghosh
CSE 100, April, 2005
3 of 19
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Mobile Computing
Relationships: Nomadic–Mobile
Laptops, PDAs, other hand held device No n/w Fixed n/w Fixed Wireless wireless n/w (A) n/w wireless n/w (B)
Nomadic computing
Mobile computing
Ubiquitous computing
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