Mobile Communication & Computing - Dec 2013

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) What is Hidden and exposed terminal problem?Discuss solution to these problems.(5 marks) 1(b) Write short note on wireless local loop.(5 marks) 1(c) Compare IEEE 802.11 and HiperLAN2.(5 marks) 1(d) Which components are new in GPRS as compared to GSM? What is their purpose?(5 marks) 2(a) Draw and explain iGSM architecture and iGSM procedures.(10 marks) 2(b) Explain motivation of WATM also explain WATM generic reference model.(10 marks) 3(a) Why is routing in multi-hop adhoc network complicated?What are the special challenges?(10 marks) 3(b) Explain Bluetooth protocol stack with neat diagram.(10 marks) 4(a) Explain how the power management is done in IEEE 802.11 infrastructure based and adhoc networks.(10 marks) 4(b) Explain snooping TCP and Mobile TCP with their merits and demerits.(10 marks) 5(a) Explain protocol architecture of DECT.(10 marks) 5(b) Explain three Tier Architecture for mobile computing.(10 marks) 6(a) Explain the following with respect to mobile IP.
IP Packet delivery
Registration
Encapsulation(10 marks) 6(b) Describe the mobile satellite system(LEO and GEO).(10 marks)

Any four

7(a) Write short note on any four
WMI script(5 marks) 7(b) EPOC(5 marks) 7(c) Threats and security issues in mobile computing.(5 marks) 7(d) PCS Architecture(5 marks) 7(e) CDMA 2000(5 marks) 7(f) ZigBee(5 marks)