Mobile Communication & Computing - May 2015

Computer Engineering (Semester 6)

TOTAL MARKS: 80
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Assume data if required.
(4) Figures to the right indicate full marks. 1 (a) Draw and Explain Electromagnetic Spectrum for communication.(5 marks) 1 (b) Explain Hidden station and exposed station problems in WLAN.(5 marks) 1 (c) Explain various types of handoffs in GSM network.(5 marks) 1 (d) Explain GSM Frame Hierarchy.(5 marks) 2 (a) Explain synchronization in 802.11 MAC management layer for both infrastructure as well Adhoc WLANs.(10 marks) 2 (b) Explain GPRS architecture in detail. Compare it with GSM architecture.(10 marks) 3 (a) Compare HIPERLAN-1, HIPERLAN-2 and 802.11 W-LAN.(10 marks) 3 (b) Explain the functioning of I-TCP and SNOOP-TCP, giving advantages and disadvantages of both.(10 marks) 4 (a) Why is Mobile IP packet required to be forwarded through a tunnel. Explain minimal techniques of encapsulation of Mobile IP packet.(10 marks) 4 (b) Explain functioning of Bluetooth Baseband layer.(10 marks) 5 (a) Explain UMTS architecture. Explain UTRA-FDD and TDD modes.(10 marks) 5 (b) Explain how Mobile Terminated Call works detailing the role of HLR and VLR.(10 marks)

Short Notes on any 2

6 (a) Wireless Local Loop.(10 marks) 6 (b) Privacy and Authentication in GSM.(10 marks) 6 (c) Android framework.(10 marks)