Convergence of Technologies & Networking in Communication - May 2012

Information Technology (Semester 5)

TOTAL MARKS: 100
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any four from the remaining questions.
(3) Assume data wherever required.
(4) Figures to the right indicate full marks. 1(a) Discuss the different types of stations defined by HDLC. How a communication channel in HDLC that is used by a station can be configured.(5 marks) 1(b) Describe the characteristics of 3G system.(5 marks) 1(c ) Compare different multiplexing techniques. (5 marks) 1(d) Compare SDMA, FDMA, TDMA and CDMA. (5 marks) 2(a) Explain classification of signalling techniques. (10 marks) 2(b) Explain 3G UMTS network. (10 marks) 3(a) Explain traffic management in ATM. Also explain ATM traffic policing.(10 marks) 3(b) Classify different switching architectures. Discuss one of them(10 marks) 4(a) Describe in brief BPSK modulator and demodulator. Also calculate probability of error. (10 marks) 4(b) Explain Handoff Algorithm.(10 marks) 5(a) What are different types of traffic? Explain leaky bucket algorithm in brief.(10 marks) 5(b) Explain different traffic descriptors used in ATM. (10 marks) 6(a) Explain ISDN protocol stack in detail with neat sketches. (10 marks) 6(b) What do you mean by encryption? Explain symmetric and asymmetric key methods in detail (10 marks)

Write short notes on any two of the following:-

7(a) TMN(10 marks) 7(b) LLC Sublayer(10 marks) 7(c ) Spreading codes and scrambling process.(10 marks)