Concepts of Wireless Networking 2069

Attempt  all questions.

1. What are the advantage of Wireless Network? Discuss the development of 1G to 3G Wireless Network.

2.Consider a Transmitter which radiates a sinusoidial carrier frequency of 1850 MHz. For a vehicle moving 60mph, compute the received carrier frequency if the mobile is moving (a) directly towards the transmitter.(b)directly towards the transmitter and (c) in direction which is perpendicular to the direction of the transmitted signal.(2+2+2)

3. Draw the transmitter and Receiver of QPSK and derive the expression for transmitted signal and received signal.(6)

4. Determine the power spectral density (PSD) of BPSK signal. Compare the PSD of QPSK, MSK and BPSK.(4+2)

5. Prove the acual between the centers of two adjacent co channel cells D = √3N R (6)

Where N = Cluster size

            R = Radius of hexagonal cells.

6. Consider a cellular system with 416 radio channels available for handling traffic. Suppose 21 of their channel are designed to control channels. Let the average channel holding time of a call be 3 minutes, the blocking probability during busy hours be 2%, and the frequency reuse factor be 9.

a. Determine the number of calls per hour.

b.Determine the signal to channel interference ratio in dB.(3+3)

[At 2% blocking probability with 44 available channel, the traffic load is 34.683 Erlanas]

7. What is multiple Access? What are the type of multiple Access? Why CDMA is superior than TDMA.

8. Write the procedure for location update and call setup for the two-tier network architecture of IS-41.(6)

9. Write about Mobile IPV6 operation. Write its advantages(4+2)

10. Write short notes on(any two):

a) Transmission control protocol(TCP)

b) MSK and GMSK

c) Handoff design issues

d) Hata model for path loss