MC November 2009 Set3

V B.Tech I Semester Regular Examinations, November 2009
MOBILE COMPUTING
(Common to Computer Science &Engineering, Information Technology,
Electronics &Computer Engineering)
Time: 3 hours Max Marks: 80
Answers any Five Questions
All Questions carry equal marks
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1. (a) Explain the architecture of mobile computing. [8]
(b) Explain the following. [8]
(i) Handover in GSM (ii) Security services in GSM.
2. (a) What is CDMA? Explain in detail. [8]
(b) Explain the following problems of wireless transmission.
(i) Exposed Terminal (ii) Hidden Terminal (iii) Near and far Terminal [8]
3. (a) What is IP packet delivery? Explain it. [8]
(b) What is the main purpose of registration of a mobile node? Explain in detail. [8]
4. (a) Write the differences between TCP and UDP. [6]
(b) Explain Indirect-TCP. What are its advantages and disadvantages? [10]
5. (a) Explain the following cache invalidation mechanisms. [8]
(i) Stateful Asynchronous (ii) Stateless synchronous
(b) List and explain the context types in context-aware computing. [8]
6. (a) Explain push based data delivery mechanisms in detail. [8]
(b) Explain the following selective tuning techniques: [8]
(i) Directory method. (ii) Hash based method.
7. (a) Explain routing complications in mobile Ad-hoc networks. [8]
(b) Describe the working of mobile Ad-hoc networks. [8]
8. (a) Explain the MAC layer of Bluetooth. [8]
(b) Explain about the wireless application environment. [8]