Question Paper: Mobile Computing Question Paper - May 2015 - Computer Engineering (Semester 7) - Mumbai University (MU)
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Mobile Computing - May 2015

MU Computer Engineering (Semester 7)

Total marks: --
Total time: --
INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary

1 (a) Explain packet flow in mobile IP, if two mobile modes communicating and both are in foreign networks. What additional routes do packets takes if reverse tunneling is required? 10 marks

1 (b) Explain three cell and seven cell clustering for mobile wireless network used in cellular system. 10 marks

1 (c) What are the additional functions in wireless ATM with respect to fixed ATM. Explain in brief. 10 marks

2 (a) Consider a mobile user who is migrating from a place to another place, provide him seamless service by satellite system, also sketch the architecture. 10 marks

2 (b) Name the main difference Adhoc Network and other networks what advantages do other network offers? Explain in detail with suitable example. 10 marks

3 (a) Explain handoff management techniques used in cellular system. 10 marks

3 (b) What are the major difference between WAP 2.0 and WAP 1.x? What influenced the WAP 2.0 development? 10 marks

4 (a) What limits the number of simultaneous users in a TDM/FDM system compared to a CDM system? What happens to the transimission quality of connections if the load gets higher on the cell? 10 marks

4 (b) Name basic applications of satellite communication and describe the tends. 10 marks

5 (a) Why is routing in multihop adhoc networks complicated, what are the special challenges? 10 marks

5 (b) What are mobile agents? Discuss their primary advantages over other approaches. 10 marks

6 (a) Part from dropping packets due to a handover or higher bit error rates, the occurrence of lengthy and / or frequent disconnection is also a problem in mobile network. Explain, how Mobile TCP protocol overcomes this problem. Also list main advantages and disadvantages of this solution. 10 marks

6 (b) Distinguish between HSCSD and GPRS? How is GPRS made possible over GSM? Explain? 10 marks

Write short notes on (any two):

7 (a) Wireless Telephony applications. 10 marks

7 (b) M-Commerce. 10 marks

7 (c) Wireless Broadband. 10 marks

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