B.E./B.Tech. DEGREE EXAMINATION. MAY/JUNE 2013 080230039 - MOBILE COMPUTING

Question paper code: 31157

B.E./B.Tech. DEGREE EXAMINATION. MAY/JUNE 2013

sixth semester

Computer Science and Engineering

080230039 - MOBILE COMPUTING

(Regulation 2008)

Time: Three hours Maximum: 100marks

Answer ALL questions.

PART A - (10 x 2 = 20 marks)

1. Define Multi-path propagation.

2. Differneciate between classical aloha alotted aloha in TDMA

3. Give types of handover scenario in GSM.

4. Which type of different services does GSM offer?

5. What are the transmission technologies used to set up WLANs?

6. Define piconet in Bluetooth.

7. What are the advantages and disadvantages of Cellular IP?

8. Write short note on Flat ad-hoc Routing.

9. What are the primary goals of WAP?

10.Define fast retransmit.

PARTB - (5 X 16 = 80 marks)

11. (a) What is spread spectrum? Explain in detail Direct Sequence Spread Spectrum (DSSS) and Frequency Hopping Spread Spectrum (FHSS) with neat sketch. (16)

Or

(b) Discuss in detail how to avoid hidden terminals problem and exposed terminals problem in Multiple Access with Collision Avoidance (MACA). (16)

12. (a) Explain about the following in GPRS Architecture with neat sketch.

(i) GPRS Architecture reference Model. (8)

(ii) GPRS Tansmission Plan Protocol Reference Model. (8)

Or

(b) Explain in detail Digital Video Broadcasting (DVB) with neat diagram.

(16)

13. (a) Describe the following in MAC Management IEEE 802.11 with neat diagram.

(i) Power Management in infrastructure network and ad-hoc network.(10)

(ii) Roaming (6)

Or 

(b) Write about the following in HIPERLAN:

(i) Phases of the HIPERLAN1 EY-NPMA access scheme (8)

(ii) HIPERLAN2 protocols stack with neat diagram. (8)

14. (a) (i) Explain in detail tunneling and encapsulation mechanism in Mobile IP. (8)

(ii) Discuss about Dynamic Host Configuration Protocol (DHCP). (8)

Or

(b) Explain the following Routing Techniques

(i) Dynamic Source Routing (DSR) (8)

(ii) Destination Sequence Distance Vector (DSDV) Routing. (8)

15. (a) Explain in detail the following classical TCP Improvement Mechanism with advantages and disadvantages.

(i)Indirect TCP (8)

(ii)Snooping TCP. (8)

Or

(b) Discuss in detail about WAP2.0 architecture with neat protocol framework.(16)