M.Sc Computer Science (Nov-2011) Madras University-Mobile Computing

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M.Sc Computer Science (Nov-2011) Madras University, M.Sc (CS) , Second Year, Semester- III, Mobile Computing, PSAEE Question paper


Course: M.Sc M.Sc Computer Science       University/board: Madras University



University Name: Madras University
Name of the Degree: M.Sc (Computer Science)
Title of the Paper: Mobile Computing - (Elective-II)
Month & Year of Examination: November - 2011
Subject Code: PSAEE
Semester: III
Year: Second Year

Time: Three hours
Maximum: 75 marks

PART A

(10 * 1 = 10 marks)

Answer any TEN questions.
All questions carry equal marks.
Each answer should not exceed 50 words.

1. What is line-of-sight?

2. Define reflection.

3. What is the need of Frequency reuse?

4. Write down the advantages of GEO.

5. What is the use of Guard space?

6. Define
(a) Uplink
(b) Downlink

7. Draw the main components of UMTS reference architecture.

8. Write down the main difference between hard handover and soft handover.

9. What is NIT?

10.Define Foreign Agent.

11.List out the functions of Ad-hoc Networks.

12.What is License free operation?


PART B

(5 * 5 = 25 marks)

Answer any FIVE questions.
All question carry equal marks.
Each answer should not exceed 200 words.

13. Discuss on the motivation for a specialized MAC.

14. Explain the advantages and disadvantages of MEO and LEO.

15. Give the architecture of an infrastructure-based IEEE 802.11 and explain it.

16. Write about the functions and necessity of the Registration in mobile networks.

17. Discuss on Reverse Tunneling.

18. What is congestion control? Explain.

19. Write short notes on Transaction oriented TCP.


PART C 

(4 * 10 = 40 marks)

Answer any FOUR questions.
All question carry equal marks.
Each answer should not exceed 500 words.


20. What is multiplexing? Explain the different types of multiplexing with neat diagram.

21. Explain the transmission of data in wireless network based on CDMA Technique.

22. Draw the functional architecture of a GSM system and explain.

23. Explain the IP packet delivery to and from the mobile node.

24. Discuss on Routing in Mobile Ad-hoc networks.

25. Describe:
(a) Mobile node
(b) Fast recovery in TCP.