B.E. Electronics & Telecommunication, Wireless Networks (WN), Semester 8, May 2011.

B.E. Electronics & Telecommunication,

Wireless Networks (WN), Semester 8, May 2011.

(REVISED COURSE)

(3 Hours)

[Total Mark: 100]

N.B. (1) Question No 1 is compulsory.

(2) Attempt any four questions out of remaining six questions.

(3) Draw neat sketches wherever required.

(4) Assume suitable data if required.

1. (a) What is frequency reused in GSM? Explain. ----- (5 Marks)

(b) Explain the concept of hidden exposed terminal in WLAN. --- (5 Marks)

(c) Explain the security aspect of Bluetooth. ----- (5 Marks)

(d) Explain various WLAN topologies. ---- (5 Marks)

2. (a) Explain forward link features of CDMA 2000 and also explain basic services provided by upper layers of CDMA 2000. ---- (10 Marks)

(b) Draw the block diagram and explain GSM architecture in detail indicating all the interfaces. ---- (10 Marks)

3. (a) Explain Link budget analysis and requirements of Wireless network. ---- (10 Marks)

(b) Draw network connection establishment flow in Bluetooth and explain Park, Hold and Sniff mode in detail. ---- (10 Marks)

4. (a) Draw and explain WAP architecture in detail. ----- (10 Marks)

(b) Explain the following: ---- (10 Marks)

(i) Bluetooth protocol stack.

(ii) Bluetooth application.

5. (a) Explain logical channel hierarchy in GSM. ---- (6 Marks)

(b) Explain security aspect of GSM. ----- (6 Marks)

(c) Explain in detail Wireless sensor network. ----- (8 Marks)

6. (a) Give the advantages, disadvantages and applications of WAP. -----(10 Marks)

(b) Explain the following: ---- (10 Marks)

(i) ZigBee technology.

(ii) WIMAX

7. Compare and Contrast the following: ---- (20 Marks)

(a) GSM and CDMA

(b) IS- 95 and CDMA 2000

(c) CDMA 2000 and WCDMA