BAC3303  MOBILE COMPUTING.

UNIVERSITY EXAMINATIONS: 2018/2019
EXAMINATION FOR THE DEGREE OF BACHELOR OF APPLIED
COMPUTING
BAC3303 MOBILE COMPUTING
FULL TIME/PART TIME
DATE: APRIL, 2019 TIME: 2 HOURS
INSTRUCTIONS: Answer Question One & ANY OTHER TWO questions.

QUESTION ONE
a) Mention FOUR challenges of mobile computing [4 Marks]
b) Compare the working of FDMA and TDMA schemes [4 Marks]
c) How does Frequency reuse help channel allocation of cellular systems?
[6 Marks]
d) Explain SIX features of Wireless Broadband WiMAX. [6 Marks]
e) Briefly discuss the functions of base station and mobile switching center in a cellular
architecture. [10 Marks]
QUESTION TWO
a) What is location management in mobile computing? Mention various phases of location
management. [8 Marks]
b) Define the following terms
i. Session Mobility [1 Mark]
ii. Service Mobility [1 Mark]
iii. Network mobility [1 Mark]
c) List and explain FIVE features of Mobile Transaction Processing [5 Marks]
d) What is roaming? How helpful is it in mobile computing [4 Marks]
QUESTION THREE
a) Outline THREE characteristics of MANET in mobile computing [3 Marks]
b) What are the functionalities and application areas of MANET? [6 Marks]
c) Briefly discuss SIX design issues of MANET [6 Marks]
d) Describe the TWO major classification of MAC protocols [2 Marks]
e) Outline THREE characteristics of MAC protocols [3 Marks]
QUESTION FOUR
a) Explain the three-way handshake in the adaptation of TCP window. Use diagram where
necessary [10 Marks]
b) The switching system that is present in GSM network is responsible for performing call
processing. Outline the elements of the switching system and elaborate on their functions
[10 Marks]
QUESTION FIVE
a) What is sensor networks? [1 Mark]
b) State and explain SEVEN MAC Protocol Performance Metrics [7 Marks]
c) Describe in detail the following occurrence in mobile computing. Use diagram where
necessary.
i. Exposed Nodes [4 Marks]
ii. Hidden Node/Terminal Problem [4 Marks]
iii. Capture [4 Marks]

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