SPPU Computer Engineering (Semester 5)
Data Communication and Wireless Sensor Networks
December 2016
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

Solve any one question.Q1(a,b) Q2(a,b)
1(a) We have four sourcee, each creating 250 characters per second. If the interleaved unit is a character and each synchronizing bit is added to each frame find
i) The data rate of each frame
ii) The duration of each character in each source
iii) The frame rate
iv) The duration of each frame
v)The number of bits in each frame
vi) The data rate of the link
6 M
1(b) Explain RFID Based Data Communication
4 M

2(a) Write key Definitions of following components od Sensor Networks
i) Sensor
ii) Sensor Node
iii) Routing
iv) Data Centric routing
v) Collaborative processing
vi) Localization and tracking
6 M
2(b) Explain the Scrambling technique in encoding. What are different types of scrambling techniques?
4 M

Solve any one question.Q3(a,b) Q4(a,b)
3(a) Explain ALOHA,
SLOTTED ALOHA and CSMA/CD, Comment on the efficiency of each random access technique.
6 M
3(b) Write short note on:
i) Bluetooth architecture
ii) Virtual private networks.
4 M

4(a) Explain stop and wait ARQ, Gp back-n ARQ and selective repeat ARQ. Comment on the performance of each.
6 M
4(b) Explain in detail Delta modulation. Draw block diagram of delta modulator and demodulator. What are its advantages on PCM.
4 M

Solve any one question.Q5(a,b) Q6(a,b)
5(a) Define the following related to WSN and explain in brief
i) Unit code identifier
ii) Match address
iii) Resource identifier
iv) Network identifier
8 M
5(b) With the help of detail flow schematic diagram explain
i) Slotted CSMA-CA protocol
ii) CSMA-CD protocol
8 M

6(a) Explain the concept of low duty cycle protocol with wakeup period Also explain how it differs from Sparse Topology and Energy Management (STEM) Protocol.
8 M
6(b) Explain the following with respect to WSN
i) Forward Error Correction(FEC)
ii) Block Coded FEC
iii) Convolutional codes
iv) Interleaving
8 M

Solve any one question.Q7(a,b,c) Q8(a,b,c)
7(a) Explain the concept of range based localization in WSN. Explain "Range based" localization with distance measurement giving example.
8 M
7(b) Explain following terminologies related to attribute based routing in WSN
i) Direct diffusion
ii) Rumor Routing
iii) Geographical hash tables
6 M
7(c) Enlist different routing challenges in WSN and Enlist the design issues in WSN?
4 M

8(a) Explain in brief:
ii) Tunneling protocol
8 M
8(b) What are different types of routing strategies/ protocols
6 M
8(c) Write short note on:
4 M

Solve any one question.Q9(a,b) Q10(a,b)
9(a) Write short note on: i) Tiny OS
ii) Magnet OS
8 M
9(b) What do you mean by Content Delivery Network (CDN)? What are different service provided by CDN?
8 M

10(a) Explain with the help suitble architectural diagram of Nano-RK OS
8 M
10(b) Write short notes on:
i) Task driven Sensing
ii) Lite OS
8 M

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