This slide is related to mobile computing and wireless communication for PG courses.

1. Mobile Computing and
Wireless Communication
(COSC6141)
Dr. Shahnawaz Husain
Ph.D(CS&E), M.Tech (CS&E), B.E (CS&E)
shahnawaz.husain@gmail.com

2. Chapter-1
Introduction to wireless networking

3. Mobile Computing
• Mobile Computing is a technology that allows transmission of
data, voice and video via a computer or any other wireless
enabled device without having to be connected to a fixed
physical link.
The main concept involves −
• Mobile communication- refers to the infrastructure put in place to
ensure that seamless and reliable communication goes on.
• Mobile hardware- includes mobile devices or device components that receive or
access the service of mobility.
• Mobile software- Mobile software is the actual program that runs on the mobile
hardware. It deals with the characteristics and requirements of mobile applications.

4. *Mobile Devices: It doesn't mean devices are mobile but they
support mobility. It is possible with the help of unguided
communication medium (radio waves).

5. The electronics
boom
Figure 1.1 The growth of mobile telephony as compared with other popular inventions of the 20th century.

13. Figure 1.6 Timing diagram illustrating how a call to a mobile user initiated by a landline subscriber is established.

14. Figure 1.7 Timing diagram illustrating how a call initiated by a mobile is established.

17. Figure 2.1 Growth of cellular telephone subscribers throughout the world.

18. Figure 2.2 Worldwide subscriber base as a function of cellular technology in late 2001.

20. Figure 2.3 Various upgrade paths for 2G technologies.

22. Figure 2.4 Example of the emerging applications and markets for broadband services. (Courtesy of Harris Corporation, ©1999, all rights
reserved.)

24. Figure 2.7 A wireless Competitive Local Exchange Carrier (CLEC) using Asynchronous Transfer Mode (ATM) distribution.

25. Figure 2.8 Measured received power levels over a 605 m 38 GHz fixed wireless link in clear sky, rain, and hail [from [Xu00], ©IEEE].

26. Figure 2.10 Overview of the IEEE 802.11 Wireless LAN standard.

27. Figure 2.14 Schematic of an experiment to determine how received interference impacts end user performance on a WLAN network [Hen01]
demonstrated that a CAD prediction and measurement environment can be used to accurately and rapidly predict true end user throughput in a
multi-node network using blind prediction. Such capabilities will be vital as user densities increase in WLAN networks within buildings or
campuses.

28. Figure 2.15 A typical neighborhood where high speed license free WLAN service from the street might be contemplated [Dur98b].

29. Figure 2.16 Measured values of path loss using a street-mounted lamp-post transmitter at 5.8 GHz, for various types of customer premise
antenna [from [Dur98], ©IEEE].

30. © 2002 Pearson
Education, Inc.Figure 2.17 Example of a Personal Area Network (PAN) as provided by the Bluetooth standard.