REG. No.

ST.ANNE’S COLLEGE OF ENGINEERING AND TECHNOLOGY

CONTINUOUS INTERNAL ASSESMENT - I

EC1016 – WIRELESS NETWORKS

Department: ECE Semester : VI

Date: 25.02.2013 Time: 3Hours Max Marks: 100

Answer ALL Questions

PART –A (10 X 2 = 20 Marks)

1. Name five design consideration in selecting a modulation scheme for a wireless networks.

2. Why is PPM used with IR communication instead of PAM?

3. Define: a. persistent, b. non persistent, c. 1-persistent, d. p-persistent?

4. Difference between ALOHA and slotted ALOHA.

5. What are the popular access schemes for data networks? Classify them.

6. Compare single hop and multihop networks topologies.

7. Name the 5 different cell types in the cellular hierarchy and compare them.

8. Why is hexagonal cell shape preferred over square or triangular cell shape to represent the cellular

architecture?

9. Define channel borrowing technique and give its types.

10. Explain the terms FCA, DCA, HCA.

PART –B (5 X 16 = 80 Marks)

11. a. Explain the concept of cellular topology and cell fundamentals with examples. (16)

(Or)

b. Explain the concept of cellular topology and cell fundamentals with examples. (16)

12. a.Explain in detail about security in wireless networks. (16)

(Or)

b. Explain the concept of cellular topology and cell fundamentals with examples. (16)

13. a.With necessary diagram explain the different type of Random Access Methods of Mobile Services. (16)

(Or)

b. Explain the concept of cellular topology and cell fundamentals with examples. (16)

14. a. i) what is UWB pulse transmission? Describe the salient features. (8)

ii) Explain about short distance range in wireless networks. (8)

(Or)

b. Explain the concept of cellular topology and cell fundamentals with examples. (16)

15. a.What are the considerations needed in the design of wireless modems? Substantiate. (16)

(Or)

b. Explain the concept of cellular topology and cell fundamentals with examples. (16)

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