MobileCompChap01L09 Cellular WLAN AdHocNW
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Transcript of MobileCompChap01L09 Cellular WLAN AdHocNW
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Oxford University Press 2007. All rights reserved. 1
Mobile Communication An overview
Lesson 09
Mobile System Networks
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Mobile System Networks
Cellular networks
WLAN networks
Ad Hoc Networks
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Cellular Networks
A cell is the coverage area of a base
station, connected to other stations viawire or fibre or wirelessly through
switching centres
The coverage area defines a cell and its
boundaries.
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Cellular Networks
Each cell base station functions as an
access point for the mobile service. Each mobile device connects to the base
station of the cell which covers the
current location of the device All the mobile devices within the range of
a given base station communicate with
each other through that base stationonly.
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Cellular Network
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WLAN Network and Mobile IP
For connectivity between the Internet,
two LANs, mobile devices, andcomputers
Mobile device connects to an accesspoint, called a hot spot
The access point, in turn, connects to a
host LAN which links up to the Internetthrough a router
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Communication between mobile devices using
a WLAN network through hot-spots
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Mobile IP
An open standard based on the IP
(internet protocol)
Mobile IP network provides the mobile IP
service using home agents and foreignagents.
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Ad hoc Networks
The nodes, mobile nodes, and sensor
nodes communicate among themselvesusing a base station
The base stations function as gateways The ad hoc networks deployed for
routing, target detection, service
discovery, and other needs in a mobileenvironment
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Communication of mobile nodes and Sensor
nodes using a base station as a gateway
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Summary
Mobile Computing Systems Networks
Cellular networks
WLANs
Mobile IP network Access points
Ad hoc Sensor networks
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End of Lesson 09
Mobile System Networks