Information Technology Engineering Sem 6 Wireless Networks00071079 Question Paper PDF 2026 - Mumbai University | munotes

Questions asked in this paper

1. Q1 Answer any three questions out of any remaining five questions Figures in right indicate marks Diagrams to be drawn neatly & should be legible
2. Q1 a) The channel data rate is 270.833kbps in GSM standard that is 40% of theoretical maximum data rate that can be supported in a 200kHz channel bandwidth. Calculate the corresponding 4 marks
   • b) Write in brief about WLAN technology and discuss about Hidden exposed terminal problem in 4
   • c) Explain frequency reuse concept with neat diagram and state the mechanism to calculate frequency
   • d)Write about the GSM logical channel hierarchy in detail. 4
   • e) Discuss about UMTS 3G security with neat flow diagram. 4
3. Q2 a) Write in detail the working of Reverse link CDMA system In an IS-95 system calculate the processing gain in dB if the baseband data rate is 9.6kbps, 4.8kbps, 2.4kbps & 1.2 kbps in rate set 1. If the error correction codes increase the data rate to 19.2kbps, recalculate the processing gain. Comment on the results obtained. [10]
4. Q2 b) Explain with neat diagram about DSSS technique in detail with types of spread spectrum. 10 marks
5. Q3 a) Explain the working of WEP protocol in detail with neat diagram. 10 marks
6. Q3 b) Write in detail about the need of internet firewalls for trusted system in wireless networks. 10 marks
7. Q4 a) Draw and explain the GPRS architecture in detail with neat diagram. 10 marks
8. Q4 b) Discuss and compare between MANET & VANET architecture with its applications. 10 marks
9. Q5 a) Amobile communication system is allocated RF spectrum of 25 MHz and uses RF channel bandwidth of 25 kHz so that a total numberof 1000 voice channels can be supported in the system
   • i) If the cell service divide into 20 cells with a frequency reuse factor of A, calculate the system
   • ii) The cell size is reduced to the extent that the service area is now covered with 100 cells Compute the system capacity while keeping the frequency reuse factor as 4. [10]
10. Q5 b) Explain in detail the working of forward link CDMA system with neat diagram. 10 marks
11. Q6 Write in detail on any four of the following: 20 marks
    • a)UMTS Architecture
    • b) wireless architecture
    • c) Bluetooth architecture
    • d) of GSM architecture
    • e) WPAN 802.15.1 standard

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