Wireless Network - Dec 2013

Electronics & Telecomm. (Semester 8)

TOTAL MARKS: 80
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Assume data if required.
(4) Figures to the right indicate full marks. 1(a) List out of components of sensor nodes.(5 marks) 1(b) What is adaptive multirate coding.(5 marks) 1(c) Explain the concept of hidden node and exposed with respect to WLAN.(5 marks) 1(d) List out services provided by 3G Networks.(5 marks) 2(a) Explain park,hold and sniff mode of operation in bluetooth.Draw the complete flow diagram for network connection establishment in bluetooth.(10 marks) 2(b) Compare WAP and imod protocol stack.(10 marks) 3(a) Explain sensor Network protocol stack in detail.(10 marks) 3(b) Explain the concept of high spreed 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/
Information rate (Ri):12.2kbps.
Chip rate(Rc):3.84 meps
Required Eb/Nt:4dB
Required interference margin:3dB.
Interference factor due to other cells:0.5
Channel activity factor:0.65(10 marks) 4(b) Explain transmit diversity present in forward link of CDMA 2000(10 marks) 5(a) Explain link budget analysis and required of wireless networks.(10 marks) 5(b) Explain UMTS networks architecture.list important features of the UMTS interface.Support your answer with neat block diagram.(10 marks) 6(a) Write short Notes on:
Zigbee protocol.(10 marks) 6(b) Wimax(10 marks) 7(a) Explain L-R-WPAN devices architecture with suitable diagram.(10 marks) 7(b) State and explain commonly used wireless LAN topologies with diagram.(10 marks)