1.a. Explain the authentication process in GSM.

1.b Discuss the need for 3G cellular networks.

1.c If there are 50 channels in a cell to handle all the calls and the average call holding time is 100s/call, how many calls per hour can be handled in this cell with a blocking probability of 2%? For number of channels = 50 and Pb= 2% Traffic intensity in Erlangs is 40.3

1.d Explain the Forward and Reverse channel structure in CDMA.

2.a Explain GSM frame and time slot structure.

2.b Explain GSM signaling and protocol architecture.

3.a Explain CDMA reverse channel processing.

3.b Discuss mobility and resource management in CDMA.

4.a Explain 4G-LTE architecture with a neat block diagram in detail.

4.b Explain cell splitting. If the radius of each new microcell is half that of the original cell, show that i) Traffic load increases four times. ii) Transmit power must be reduced by 12dB to maintain the S/N requirement with a path loss exponent of 4.

5.a Explain UMTS network architecture in detail with interfaces.

5.b Compare the characteristics of WCDMA and CDMA 2000.

5.c Explain GPRS network architecture.

6.a Trunking and GoS

6.b Mobile IP

6.c MANET

6.d Interfaces used in GSM systems