IV B.Tech. I Semester Regular Examinations, November, 2011
MOBILE COMPUTING
(Common to Computer Science & Engineering, Information Technology and Electronics &
Computer Engineering)
Time: 3 Hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
*******
1. a) What are the limitations of mobile and wireless devices?
b) How is localization, location update, roaming etc., done in GSM and reflected in
the databases? What are typical roaming scenarios?
2. a) Explain the term interference in the space, time, frequency and code domain.
What are counter measures in SDMA, TDMA, FDMA and CDMA systems.
b) Which of the MAC schemes can give hard guarantees related to bandwidth and
access delay?
3. a) What could be quick ‘solutions’ and why don’t they work?
b) List the entities of mobile IP and describe data transfer from a mobile node to a
fixed node and vice-versa. Why and where is encapsulation needed?
4. a) Explain snooping TCP.
b) Describe slow start of congestion control. How can fast recovery take place in
the congestion avoidance phase?
5. a) Explain client-server computing with adaptation.
b) Why does a mobile device take QoS issues into account while computing?
List the object models for application adaptation for the QoS constraints.
6. a) Explain the reasons for communication asymmetry in mobile network. Give
examples of asymmetric communication architecture for data dissemination.
b) Explain index-based method of selective tuning and indexing techniques.
7. a) How does the symmetry of wireless links influence the routing algorithms proposed.
b) What are the differences between AODV and the standard distance vector algorithm?
Why are extensions needed?
8. a) Explain the MAC layer of Bluetooth.
b) Describe the wireless application environment (WAE) logical model.
MOBILE COMPUTING
(Common to Computer Science & Engineering, Information Technology and Electronics &
Computer Engineering)
Time: 3 Hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
*******
1. a) What are the limitations of mobile and wireless devices?
b) How is localization, location update, roaming etc., done in GSM and reflected in
the databases? What are typical roaming scenarios?
2. a) Explain the term interference in the space, time, frequency and code domain.
What are counter measures in SDMA, TDMA, FDMA and CDMA systems.
b) Which of the MAC schemes can give hard guarantees related to bandwidth and
access delay?
3. a) What could be quick ‘solutions’ and why don’t they work?
b) List the entities of mobile IP and describe data transfer from a mobile node to a
fixed node and vice-versa. Why and where is encapsulation needed?
4. a) Explain snooping TCP.
b) Describe slow start of congestion control. How can fast recovery take place in
the congestion avoidance phase?
5. a) Explain client-server computing with adaptation.
b) Why does a mobile device take QoS issues into account while computing?
List the object models for application adaptation for the QoS constraints.
6. a) Explain the reasons for communication asymmetry in mobile network. Give
examples of asymmetric communication architecture for data dissemination.
b) Explain index-based method of selective tuning and indexing techniques.
7. a) How does the symmetry of wireless links influence the routing algorithms proposed.
b) What are the differences between AODV and the standard distance vector algorithm?
Why are extensions needed?
8. a) Explain the MAC layer of Bluetooth.
b) Describe the wireless application environment (WAE) logical model.
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