Mobile Communication Question Paper - May 2017 - Electronics and Telecom Engineering (Semester 8) - Savitribai Phule Pune University (SPPU)

Mobile Communication - May 2017

SPPU Electronics and Telecom Engineering (Semester 8)

Total marks: --
Total time: --
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary

Solve any one question from Q.1(a,b) &Q.2(a,b)

1(a) Explain the assumptions in
i) Pure chance traffic
ii) Statistical equilibrium.
5 marks

1(b) Explain different channel assignment strategies in mobile celluar system. 5 marks

2(a) With a neat diagram explain the term progressive grading in detail. 5 marks

2(b) Why is handoff necessary in mobile cellular systems? Explain Mobile Assisted handoff. 5 marks

Solve any one question from Q.3(a,b) &Q.4(a,b)

3(a) Explain the concept of time slot interchange (TSI) in time division switching. 5 marks

3(b) During busy hour, 1200 calls were offered to a group of trunks and six were lost. The average call duration was 3 minutes. Find
i) Traffic offered
ii) Traffic carried
iii) Traffic lost
iv) Grade of service
v) Total duration of periods of congestion.
5 marks

4(a) What is Microcell zone concept? How is it used to improve capacity. 5 marks

4(b) Write short notes on:
i) PCM signaling.
ii) Inter-register signaling.
5 marks

Solve any one question from Q.5(a,b) &Q.6(a,b)

5(a) State and explain different types of channels used in AMPS. 5 marks

5(b) With a proper flow diagram explain.
i) Mobile station registration in GSM network.
ii) Mobile call setup and Termination.
5 marks

6(a) Write a short note on basic radio transmission parameters of the GSM system. 5 marks

6(b) Draw a neat diagram of GSM Architecture and explain the function 5 marks

Solve any one question from Q.7(a,b) &Q.8(a,b)

7(a) State and explain data services in GSM. 5 marks

7(b) With the suitable diagram, explain the frame structure of
i) Mobile terminated SMS messages.
ii) Mobile originated SMS messages.
5 marks

8(a) Write a short note on Radio Link Protocol (RLP). 5 marks

8(b) With a neat diagram explain operation of GMSK modulator. 5 marks

Solve any one question from Q.9(a,b) &Q.10(a,b)

9(a) Explain the basic types pseudo random sequence used in spread spectrum CDMA system. 5 marks

9(b) Compare between technical parameters of WCDMA & IS-95. 5 marks

10(a) Draw the block diagram of Rake receiver & explain its operation. 5 marks

10(b) Draw and explain the basic receiver structure for DS-CDMA. 5 marks

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