B.E. Electronics & Telecommunication,
Wireless Networks (WN), Semester 8, December 2013.
Con. 8981–13.
LJ - 13868
(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) List out of components of sensor nodes. ---- (5 Marks)
(b) What is adaptive multirate coding? ---- (5 Marks)
(c) Explain the concept of hidden node and exposed node with respect to WLAN.---- (5 Marks)
(d) List out services provided by 3G Networks. ---- (5 Marks)
2. (a) Explain park, hold and sniff mode of operations in Bluetooth. Draw the complete flow diagram for network connection establishment in Bluetooth. --- (10 Marks)
(b) Compare WAP and imode protocol stack. ---- (10 Marks)
3. (a) Explain sensor Network protocol stack in detail. ----- (10 Marks)
(b) Explain the concept of High Speed Downlink packet access in detail.---- (10 Marks)
4. (a) Calculate the uplink cell load factor and number of voice user for a WCDMA system using the following data. What is the pole capacity of the cell? ----- (10 Marks)
- Information rate (Ri) : 12.2 kbps
- Chip ratr (Rc) : 3.84 Mcps
- Required Eb/Nt : 4 dB
- Required interference margin : 3 dB
- Interference factor due to other cells : 0.5
- Channel activity factor : 0.65
5. (a) Explain link budget analysis and requirements of wireless networks. ---- (10 Marks)
(b) Explain UMTS network architecture. List important features of the UMTS interface. Support your answer with neat block diagram.---- (10 Marks)
6. Write short note on : ---- (20 Marks)
(a) Zigbee Protocol
(b) Wimax
7. (a) Explain LR – WPAN device architecture with suitable diagram . ---- (10 Marks)
(b) State and explain commonly used wireless LAN topologies with diagram. ---- (10 Marks)
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