Title of the Paper: Mobile Computing Month & Year of Examination: November - 2012 Subject Code: PSAEE Semester: III Year: Second Year
Time: Three hoursMaximum: 75 marks
PART – (10 * 1 = 10) Answer any TEN questions. All questions carry equal marks. Each answer should not exceed 50 words.
1. What is the function of the network layer? 2. What is phase shift keying? 3. What is meant by pseudo-noise sequence? 4. Expand SDMA and FDMA. 5. What is the function of base station subsystem? 6. What is intra-cell handover? 7. What are the different types of orbits? 8. What is roaming? 9. What is HIPERLAN? 10. What is a mobile node? 11. Define encapsulation. 12. What is slow start?
PART B – (5 * 5 = 25) Answer any FIVE questions. All questions carry equal marks. Each answer should not exceed 200 words.
13. Write a short note on mobile and wireless devices. 14. What are the advantages and disadvantages of cellular systems? 15. Explain mobile services. 16. Explain the algorithms specified to provide security in GSM. 17. What are the disadvantages of WLANs? 18. Explain registration in mobile network layer. 19. Explain congestion control.
PART – (4* 10 = 40) Answer any FOUR questions. All questions carry equal marks. Each answer should not exceed 500 words.
20. Discuss about any two multiplexing techniques. 21. Explain frequency hopping spread spectrum. 22. Write a detailed note on UMTS. 23. Describe the protocol architectures of HTPERLAN. 24. Explain the dynamic host configuration protocol. 25. Explain snooping TCP in detail.
University of Madras Chepauk, Chennai-600 005.
Master of 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 hoursMaximum: 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.