Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Mobile Communication – An overview Lesson 09 Mobile System Networks © Oxford University Press 2007. All rights reserved. 1 Mobile System Networks • • • Cellular networks WLAN networks Ad Hoc Networks © Oxford University Press 2007. All rights reserved. 2 Cellular Networks • • 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. © Oxford University Press 2007. All rights reserved. 3 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 station only. © Oxford University Press 2007. All rights reserved. 4 Cellular Network © Oxford University Press 2007. All rights reserved. 5 WLAN Network and Mobile IP • • • 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 © Oxford University Press 2007. All rights reserved. 6 Communication between mobile devices using a WLAN network through hot-spots © Oxford University Press 2007. All rights reserved. 7 Mobile IP • • An open standard based on the IP (internet protocol) Mobile IP network provides the mobile IP service using home agents and foreign agents. © Oxford University Press 2007. All rights reserved. 8 Ad hoc Networks • • • 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. 9 Communication of mobile nodes and Sensor nodes using a base station as a gateway © Oxford University Press 2007. All rights reserved. 10 Summary • • • • • • • Mobile Computing Systems Networks Cellular networks WLANs Mobile IP network Access points Ad hoc Sensor networks © Oxford University Press 2007. All rights reserved. 11 End of Lesson 09 Mobile System Networks © Oxford University Press 2007. All rights reserved. 12