LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

M.Sc. DEGREE EXAMINATION – COMPUTER SC.

SECOND SEMESTER – APRIL 2012

CS 2812 – MOBILE COMPUTING

 

 

Date : 19-04-2012             Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

PART-A

Answer ALL questions:                                                                                                                 10*2=20

 

1. What is Frequency division duplex?
2. Mention the logical frame hierarchy in GSM
3. List out different physical layers supported by IEEE 802.11
4. Give the four different network types of BRAN
5. Define Encapsulation.
6. Give an example for triangular routing?
7. What is slow start in TCP?
8. Write any two advantages of fast retransmit
9. List out the features offered by WTP (wireless transaction protocol) to the higher layers
10. Draw the primitive which is used to send a datagram in WDP.

 

PART-B

Answer ALL questions.                                                                                                                    5*8=40

 

11. (a) Name the main elements of GSM system architecture and describe their functions

OR

(b) Describe Digital audio broadcasting.

 

12. (a) Compare two different transmission technology used in WLANs.

OR

(b) Explain the handover scenario of HiperLAN2 in detail.

 

13. (a) Discuss the methods of router discovery in Mobile IP.

OR

(b)Describe Hierarchical mobile IPV6 with diagram.

 

14. (a) Compare snooping TCP with Mobile TCP with example network scenarios.

OR

(b) Explain the following

(i) Congestion control

(ii) Congestion window

(iii) Congestion threshold

 

15. (a) Explain in detail about the architecture of WAP (wireless application protocol)

OR

(b) What is Wireless session protocol/browsing? Discuss its session establishment,           suspension and resume.

 

 

PART-C

Answer any TWO:                                                                                                                        2*20=40

 

16. (a) Explain the countermeasures for interference in SDMA,TDMA,FDMA and CDMA

systems.

 

(b)What characteristic do the different orbits have? What are their pros and cons?

 

17. (a)Write and explain mandatory basic access mechanism for IEEE 802.11.

 

(b) Explain how tunnelling works in mobile IP using IP-in-IP, minimal, and generic routing

encapsulation. Discuss the advantage and disadvantages of these three methods.

 

18. (a) How does I-TCP isolate problems on wireless link? What are the main drawbacks of this      solution?

 

(b) Distinguish the service offered by wireless transaction protocol class0,class1 and class2.

 

Go To Main page

 

 

 

 

 

LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

M.Sc. DEGREE EXAMINATION – COMPUTER SC.

SECOND SEMESTER – NOVEMBER 2012

CS 2812 – MOBILE COMPUTING

 

 

Date : 06/11/2012            Dept. No.                                        Max. : 100 Marks

Time : 1:00 – 4:00

 

PART-A

 

Answer ALL questions:                                                                                                          10*2=20

 

1. Define Burst.
2. Give the uses of GSM –rail ?
3. List out three priorities of medium access.
4. Define Pico-net and Scatter- net.
5. What is an agent solicitation?
6. Name the messages required to optimize the mobile IP.
7. What is slow start in TCP?
8. Define firewalls.
9. List out the different type of classes of transaction services

10.Draw the primitives which is used to send a data gram in WDP?

 

 

PART-B

 

Answer ALL questions:                                                                                                    5*8=40

 

 

11 a) Compare the MAC schemes SDMA, TDMA, FDMA and CDMA.

(OR)

1. b) Explain the scheme Classical Aloha and slotted Aloha.

 

12 a) Describe about the system architecture of DECT

(OR)

802. b) Explain about MAC management of IEEE 802.11.

 

13 a Describe about cellular IP With its advantages.

(OR)

6. b) Describe about Hierarchical mobile IP V6.

 

14a)  What is Snooping? Discuss the approach of snooping in TCP.

(OR)

1. b) Write about the mechanisms of Transportation control protocol.

 

 

15a)  Discuss about WSP/B –establishment, suspension, resume and termination.

(OR)

1. b) Discuss about Wireless transaction protocols.

 

 

 

 

PART-C

 

Answer any TWO:                                                                                                                        2*20=40

 

16 a). What is GSM ? Explain their services.

 

1. b) Explain about the networking of Blue tooth.

 

17 a) Explain the access mechanism BFWMAC-DCF using CSMA/CA.

 

1.  b) Discuss about Indirect TCP.

 

18a) Explain in detail about architecture of wireless application protocol

 

1. b) Discuss about the security service offered by the WTLS.

 

 

Go To Main page