54210-mt----wireless Communication And Networks

NR

Code No: 54210/MT

M.Tech. – II Semester Regular Examinations, September, 2008 WIRELESS COMMUNICATION AND NETWORKS (Common to Embedded Systems/ Digital Systems & Computer Electronics/ Digital Electronics & Communication Systems/ Wireless & Mobile Communication) Time: 3hours

Max. Marks:60 Answer any FIVE questions All questions carry equal marks ---

1.a) b)

Explain the concept of frequency reuse. What are different types of interferences that effect efficiency of performance in wireless communications?

2.a) b)

What is capture effect in packet radio. Explain. Explain various methodologies to improve capacity of cellular systems.

3.a) b)

Distinguish between circuit switching and packet switching. What does the X.25 provide in the area of error control/detection.

4.

Explain about various aspects involved in ATM signaling system No.7(SS7).

5.a) b)

What are various WML scripts? Explain. Explain in detail about wireless data gram protocol.

6.a) b)

Explain basic features of IEEE 8O2 protocol architecture. What are the special features of Narrow Bank Microwave LANs.

7.

What is the role of blue tooth in wireless communications.

8.

Write short notes are the following: i) Data oriented CDPD Network. ii) GPRS and higher data rates. x-x-x