Code: 9A04806

B.Tech IV Year II Semester (R09) Regular & Supplementary Examinations May/June 2014 WIRELESS COMMUNICATIONS & NETWORKS

(Common to ECE & ECC) Time: 3 hours Max. Marks: 70

Answer any FIVE questions All questions carry equal marks

***** 1 (a) Explain in detail about radio protocols. (b) Explain the features of FDMA.

2 (a) Discuss about the public switched telephone network. (b) Write about any one reading protocol in adhoc networking.

3 (a) Write notes on cellular digital packet data. (b) Explain the services offered by the SS7 network.

4 (a) What is tunneling? Explain it, with an example. (b) Explain about WML scripts with examples.

5 (a) With a neat sketch, explain the architecture of IEEE 802.11. (b) Explain the configuration of omnidirectional infrared LANS.

6 (a) List the international frequency allocations for Bluetooth. (b) Discuss about the security aspects in the Bluetooth.

7 (a) Explain the architecture of GPRS, with neat diagram. (b) Explain about short messaging services in GSM.

8 (a) What is WPAN? Explain in detail. (b) List the characteristics of MANETs.

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R09