MOBILE COMPUTING (MC) MAY 2012 COMPUTER SCIENCE SEMESTER 7
Con. 3933-12. (REVISED COURSE) GN-6296(3 Hours) [Total Marks: -100]
N.B : (1) Question No.1 is compulsory.
(2) Attempt any four questions out of remaining six questions.
1. (a) List the entities of mobile IP and describe data transfer from a mobile node to a fixed node and
vice versa. [5 Marks]
(b) What advantages does the use of IPV6 offer for mobility? [5 Marks]
(c) How much of the original GSM network does GPRS need? Which elements of the network
perform the data transfer? [5 Marks]
(d) What is Hidden and Exposed terminal problem? Discuss solutions to these
problems. [5 Marks]
2. (a) Explain how the power management is done in IEEE 802.11 infrastructure based and adhoc
networks. [10 Marks]
(b) Draw and explain architecture of GPRS network. [10 Marks]
3. (a) Expalin IP-in-IP, minimal and generic encapsulation. Also discuss their merits and demerits.
[10 Marks]
(b) Eplain snooping TCP and mobile TCP with their merits and demerits. [10 Marks]
4. (a) Why is routing in multi-hop adhoc networks complicated? What are the special
challenges? [10 Marks]
(b) What characteristics do the different orbits have? What are their pros and cons? [10 Marks]
5. (a) Explain Bluetooth protocol stack with neat diagram. [10 Marks]
(b) What are the functions of Authentication and Encryption in GSM? [10 Marks]
6. (a) Explain WATM reference model with several access scenarios. [10 Marks]
(b) What are the main benefits of Spread Spectrum system? Explain direct sequences spread
spectrum in detail. How can DSSS systems benefits from multipath propagation. [10 Marks]
7. Write short notes on any four of the following : - [20 Marks]
(a) Mobile agents
(b) UMTS architecture and its domain
(c) WML
(d) CDMA
(e)HIPERLAN
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