Wireless Communication And Mobile Programming - Jun 2015

Computer Engineering (Semester 7)

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) What are the different tiers in three-tier architecture of mobile computing? Describe the functions of these tiers.(7 marks) 1 (b) Briefly describe the following networks with example and application.
1. Wired network.
2. Wireless network.
3. Ad hoc network.(7 marks) 2 (a) What are the essential functional differences between 1^stgeneration, 2^nd generation and 3^rd generation of networks?(7 marks) 2 (b) Describe protocol stack of Bluetooth.(7 marks) 2 (c) What is Mobile IP? Explain tunnelling in the context of Mobile IP.(7 marks) 3 (a) Draw and explain System architecture of GSM.(7 marks) 3 (b) Describe different GSM addresses and identifiers.(7 marks) 3 (c) What is handover/handoff? How handoff is different from roaming?(7 marks) 3 (d) Explain and differentiate between SM MT and SM MO.(7 marks) 4 (a) What is the difference between GSM and GPRS? How is data routing done in GPRS?(7 marks) 4 (b) Explain how mobile transport layer is different from TCP/IP transport layer.(7 marks) 4 (c) Explain Direct sequence spread spectrum with example.(7 marks) 4 (d) List types of wireless LAN. Differentiate between Ad hoc verses infrastructure Mode.(7 marks) 5 (a) Discuss 3G versus WiFi.(7 marks) 5 (b) Explain Session Initiation protocol.(7 marks) 5 (c) What is Mobile VoIP? Explain.(7 marks) 5 (d) Explain security frameworks for mobile environment.(7 marks)