Wireless Network - May 2016

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) What is HSDPA explain(5 marks) 1(b) Explain sensor node components with suitable diagram(5 marks) 1(c) Explain E-UTRAN with suitable diagram(5 marks) 1(d) What is RFID. Discuss the different components of RFID and explain how communication takes place among the components.(5 marks) 2(a) Using the following data for a GSM 1800 network calculate (1) average busy hour traffic per subscriber. (2) Traffic capacity per BTS (3) required member of base stations per zone (4) The hexagonal cell radius for the zone.
Subscriber usage per month = 150 minutes
Days per month = 24
Busy hour per day = 06
Allocated spectrum = 4.8 Mhz
Frequency raise plan = 4/12
RF channel with = 200 Khz (fail rate)
Present number of subscribers in the zone = 50,000
Subscriber growth = 5% per year
Area of the zone = 5000 km²
Initial installation based on a four year year design
capacity of a base station (transceiver) (BTS) = 30 Erlangs
traffic capacity of a GSM cell at 2% Gos (using Erlang B table = 8.2 Erlangs.(10 marks) 2(b) List out the factors affecting size of the cellular network and the frequency planning. Discuss these factors indetail.(10 marks) 3(a) Explain Bluetooth security features and security levels with proper diagrams.(10 marks) 3(b) Explain zigbee network components and network topologies.(10 marks) 4(a) Why TCP and UDP protocols are unsuitable for implementation in WSN. List out transpot protocols designed for WSN explain it in detail.(10 marks) 4(b) What is the key feature of SMAC explain it in detail justify its use in sensor network.(10 marks) 5(a) Why network management design is critical issue in WSN? Give reasins.(10 marks) 5(b) What is localozation of WSN nodes. Explain with examples centralized 7 distributed schemes in localization algorithms.(10 marks)

Write short notes

6(a) Middleware Architecture of WSN(10 marks) 6(b) IEEE 802.16 protocol Architecture.(10 marks)