MOBILE COMPUTING MARCH 2012

SIXTH SEMESTER DIPLOMA EXAMINATION IN ENGINEERING/TECHNOLOGY-MARCH, 2012

PART-A

(Maximum marks:15)

v  Answer the following questions in one or two sentences:

1.Define mobile computing

2. What is SDMA

3.State the use of VLR

4.List different GSM standards

5.State the use of SUMR in satellite systems.

6.List different kinds of patterns of broadcast disks.

7.What is scatternet?

8.Define Bluetooth technology.

9.State the merit of using selective retransmission approach

10.What is reverse tunneling?

PART-B

(Maximum marks:60)

(Answer one full question from each unit)

Unit-1

v  (a)Write notes onLi)TCP (ii)UDP (6)

     (b)Explain cellular systems.Write the advantages and disadvantages of cell structure.(6)

OR

v  (a)Describe the simplified reference  model for mobile computing.(8)

(b)Compare TDMA and FDMA(4)

Unit-2

v  (a)Describe different handover methods in GSM.(6)

          (b)Write notes on(i) GPRS     (ii) HSCSD (6)

OR

v  (a)Describe  GSM system architecture(12)

          

UNIT-3

v  (a)Explain the different types of orbits in satellite systems.(12)

          

OR

v  (a)Describe DAB and its transport mechanism with diagrams.(12)

          

UNIT-4

v  (a)Explain L2CAP channels and packets(6)

(b)Describe the different usage models in Bluetooth(6)

         

OR

v  (a)Explain Bluetooth protocol architecture(12)

UNIT-5

v  (a)Writes notes on(i) Congestion control       (ii) slow chart (6)

     (b)Write the advantages and disadvantages of indirect TCP.(6)

          

OR

v  (a)Explain the different entities and terminologies in mobile IP(12)

         

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