Lolita

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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

!

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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