Wireless Network (WN) Paper Solution – Dec 16 EXTC

Wireless Network (WN) Paper Solution

University: Mumbai University

Branch: Electronics and Telecommunication Engineering

Semester: 8

Q1. 05 Marks Each

A. List out Quality of service [QOS] attributes in UMTS.

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B. Explain ‘Hidden Node’ and ‘exposed node’ problems in wireless LANs.

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C. How is power control implemented in CDMA?

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D. Draw and explain with a neat diagram, the components of Senser nodes.

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Q2. 10 Marks Each

A. Calculate the downlink cell load factor and numbers of voice users per cell for a WCDMA system using the following data. What is the pole capacity of the cell?
1) Information Rate (Ri) = 12.2kbps
2) Chip rate (Rc) = 3.84 Mcps
3) Eb/Nt=4db
4) Average interference factors due to other cells = 0.5
5) Orthogonality factor =0.65
6) Interference margin=3db.

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B. What is Localization in wireless sensor networks? Explain with examples centralized and distributed schemes in Localization algorithms.

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Q3. 10 Marks Each

A. Give a detailed radio Access Network overview. Explain in detail the functions of Node B and RNC and also draw UTRAN logical architecture.

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B. Explain the ZigBee technology. Discuss different Network Topologies that are supported in Zigbee.

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Q4. 10 Marks Each

A. Explain Link budget analysis of requirements of wireless networks.

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B. Explain Various Bluetooth connection establishment states. Draw a complete flow Diagram.

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Q5. 10 Marks Each

A. Give technical requirements of IEEE 802.15.3a Physical layer w.r.t. data rates, power consumption, power management modes, scalability and interference, etc.

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B. Why Network management design issue is critical issue in wireless sensor network? Give Reason.

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Q6. 10 Marks for Both

A. Write short notes on Wimax

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B. Write short notes on Rake Receivers

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