Question Paper: Wireless Network : Question Paper May 2015 - Electronics & Telecomm. (Semester 8) | Mumbai University (MU)
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## Wireless Network - May 2015

### 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) Compare WAP and internet protocol stacks.(5 marks) 1 (b) Compare CSMA-CD and CSMA-CS protocols.(5 marks) 1 (c) Give definitions of scatter net, MAC address, parked units, sniff and hold mode.(5 marks) 1 (d) Draw and explain neat diagram of components of sensor nodes.(5 marks) 2 (a) Describe in detail LR-WPAN device architecture with suitable diagam.(10 marks) 2 (b) Draw the spectrum of ultra wide band signal compared to Wi-Fi 802.11 a signal, also explain radio frequency identification in detail.(10 marks) 3 (a) Give the detailed radio Access Network Overview. Explain in detail functions of Node B and RNC also draw UTRAN logical architecture.(10 marks) 3 (b) What is adaptive multirate (AMR) coded? Comment on Quality of service in UMTS with respect to Qos attributes.(10 marks) 4 (a) Calculate the uplink cell load factor and number of voice users for a WCDMA system using the following data. What is the pole capacity of the cell?

 -Information rate (Ri) =12.2 kbps -Chip rate (Rc) =3.84 mcps -Required Eb/N =4 dB -Required interference margin =3 dB -Interference factor due to other cells =0.5 -Channel activity factor =0.65
(10 marks) 4 (b) Explain link budget analysis and requirements of wireless networks.(10 marks) 5 (a) Explain imode protocol stacks. Also discuss programming model of WAP in detail.(10 marks) 5 (b) Explain various in bluetooth connection establishment. Draw a complete flow diagram.(10 marks) 6 (a) Explain transmit and receive DSSS PPDU with frame structure in detail.(10 marks) 6 (b) Explain reverse link features of CDMA 2000.(10 marks)

### Write short notes on:

7 (a) HSDPA(5 marks) 7 (b) Rake Receives(5 marks) 7 (c) 802.11 standard of wireless LAN(5 marks) 7 (d) WiMax(5 marks)