SPPU Computer Engineering (Semester 5)
Data Communication and Wireless Sensor Networks
December 2014
Total marks: --
Total time: --
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary

Answer any one question from Q1 and Q2
1 (a) Encode the following binary data stream into unipolar, polar (RZ, NRZ), Bipolar NRZ and Manchester codes for given Data stream : 11100101.
5 M
1 (b) A network of CSMA/CD has a bandwidth of 10 Mbps. If the maximum propagation time (including the delays in the devices and ignoring the time needed to send a jamming signal) is 25.6 μs, what is the minimum size of the frame ?
5 M

2 (a) What are different application of WSN ?
7 M
2 (b) Give definitions. 1) Baud rate 2) Bit rate 3) SNR.
3 M

Answer any one question from Q3 and Q4
3 (a) Explain what is meant by slope overload and granular noise distortion. Also explain how adaptive delta modulation improves system tolerance to slope overload.
7 M
3 (b) Write short note on Virtual LAN.
3 M

4 (a) Explain stop and wait ARQ, GO back-n ARQ and selective repeat ARQ. Comment on the performance of each.
6 M
4 (b) Explain WSN architecture in details.
4 M

Answer any one question from Q5 and Q6
5 (a) Write short notes on:
1) S-MAC
2) Sparse Topology and Energy Management (STEM)
10 M
5 (b) Explain in detail contention based protocols.
6 M

6 (a) With the help of detail flow schematic diagram explain slotted CSMA-CA protocol.
8 M
6 (b) What do you mean by LEACH protocol ? Explain organization of LEACH protocol
8 M

Answer any one question from Q7 and Q8
7 (a) What are different routing challenges and design issues in WSN?
8 M
7 (b) Explain in detail data dissemination and gathering.
8 M
7 (c) What is piconet ?
2 M

8 (a) Write short notes on:
1) Sensor Protocol for Information via Negotiations (SPIN).
2) Geographic and energy aware routing
10 M
8 (b) What are different types of routing strategies in WSN?
8 M

Answer any one question from Q9 and Q10
9 (a) Explain various parameters needed for determining distances to anchor nodes.
8 M
9 (b) Explain the impact of anchor placement.
8 M

10 (a) Write short note on:
1) Tiny OS
2) Magnet OS.
8 M
10 (b) Explain information based sensor tracking.
8 M

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