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Mobile Communication – An overview
Lesson 09
Mobile System Networks
© Oxford University Press 2007. All rights reserved.
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Mobile System Networks
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Cellular networks
WLAN networks
Ad Hoc Networks
© Oxford University Press 2007. All rights reserved.
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Cellular Networks
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A cell is the coverage area of a base
station, connected to other stations via
wire or fibre or wirelessly through
switching centres
The coverage area defines a cell and its
boundaries.
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Cellular Networks
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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 station
only.
© Oxford University Press 2007. All rights reserved.
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Cellular Network
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WLAN Network and Mobile IP
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For connectivity between the Internet,
two LANs, mobile devices, and
computers
Mobile device connects to an access
point, called a hot spot
The access point, in turn, connects to a
host LAN which links up to the Internet
through a router
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Communication between mobile devices using
a WLAN network through hot-spots
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Mobile IP
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An open standard based on the IP
(internet protocol)
Mobile IP network provides the mobile IP
service using home agents and foreign
agents.
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Ad hoc Networks
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The nodes, mobile nodes, and sensor
nodes communicate among themselves
using 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 mobile
environment
© Oxford University Press 2007. All rights reserved.
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Communication of mobile nodes and Sensor
nodes using a base station as a gateway
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Summary
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Mobile Computing Systems Networks
Cellular networks
WLANs
Mobile IP network
Access points
Ad hoc
Sensor networks
© Oxford University Press 2007. All rights reserved.
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End of Lesson 09
Mobile System Networks
© Oxford University Press 2007. All rights reserved.
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