-
7/26/2019 MobileCompChap01L09 Cellular WLAN AdHocNW
1/12
Oxford University Press 2007. All rights reserved. 1
Mobile Communication An overview
Lesson 09
Mobile System Networks
-
7/26/2019 MobileCompChap01L09 Cellular WLAN AdHocNW
2/12
Oxford University Press 2007. All rights reserved. 2
Mobile System Networks
Cellular networks
WLAN networks
Ad Hoc Networks
-
7/26/2019 MobileCompChap01L09 Cellular WLAN AdHocNW
3/12
Oxford University Press 2007. All rights reserved. 3
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.
-
7/26/2019 MobileCompChap01L09 Cellular WLAN AdHocNW
4/12
Oxford University Press 2007. All rights reserved. 4
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.
-
7/26/2019 MobileCompChap01L09 Cellular WLAN AdHocNW
5/12
Oxford University Press 2007. All rights reserved. 5
Cellular Network
-
7/26/2019 MobileCompChap01L09 Cellular WLAN AdHocNW
6/12
Oxford University Press 2007. All rights reserved. 6
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
-
7/26/2019 MobileCompChap01L09 Cellular WLAN AdHocNW
7/12
Oxford University Press 2007. All rights reserved. 7
Communication between mobile devices using
a WLAN network through hot-spots
-
7/26/2019 MobileCompChap01L09 Cellular WLAN AdHocNW
8/12
Oxford University Press 2007. All rights reserved. 8
Mobile IP
An open standard based on the IP
(internet protocol)
Mobile IP network provides the mobile IP
service using home agents and foreignagents.
-
7/26/2019 MobileCompChap01L09 Cellular WLAN AdHocNW
9/12
Oxford University Press 2007. All rights reserved. 9
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
-
7/26/2019 MobileCompChap01L09 Cellular WLAN AdHocNW
10/12
Oxford University Press 2007. All rights reserved. 10
Communication of mobile nodes and Sensor
nodes using a base station as a gateway
-
7/26/2019 MobileCompChap01L09 Cellular WLAN AdHocNW
11/12
Oxford University Press 2007. All rights reserved. 11
Summary
Mobile Computing Systems Networks
Cellular networks
WLANs
Mobile IP network Access points
Ad hoc Sensor networks
-
7/26/2019 MobileCompChap01L09 Cellular WLAN AdHocNW
12/12
Oxford University Press 2007. All rights reserved. 12
End of Lesson 09
Mobile System Networks
