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Old May 28th, 2014, 10:25 AM
Default IETE ALCCS Mobile Computing previous years question papers

Can you please give me the IETE ALCCS Mobile Computing previous years question papers?
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Old May 28th, 2014, 05:16 PM
Sashwat's Avatar
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Default Re: IETE ALCCS Mobile Computing previous years question papers

As you want to get the IETE ALCCS Mobile Computing previous years question papers so here is the information of the same for you:

Q.1 a. Explain the principle of frequency reuse in the context of cellular network.
b. Explain the meaning of IP4 datagram format fields.
c. Briefly define the different performance metrics that may be used to make the
hand-off decision.
d. Discuss the process of subscriber authentication used in GSM to ensure security.
e. Why does TCP not work properly in wireless network? Give two reasons.
f. Differentiate between location dependent and location independent services.
g. Write four characteristics of good human-computer interface. (74)

Q.2 a. Differentiate among FDMA, TDMA and CDMA. (6)
b. Explain the different approaches used for increasing capacity of the mobile
networks. (6)
c. What is co-channel interference? Given the minimum distance between two cochannels
D=81 meters, and Radius of a cell R =3 meters, find the reuse factor of
the network. (6)

Q.3 a. Explain the concept of Bluetooth. How does it differ from wireless LAN? (6)
b. What is the purpose of HLR, VLR, AuC and EIR databases in GSM network?
Explain. (6)
c. Explain how tunneling works in general and especially for mobile IP using IP-in
IP, minimal and generic routing encapsulation, respectively. (6)

Q.4 a. What are the transmission impairments that affect wireless signals? Explain. (6)
b. Compute the distance between two antennas for Line-of-Sight transmission if one
of the antenna is 100 meter high and the other is at ground level. (6)

Q.1 a. Mention any four challenges of mobile computing.
b. Explain the working of RFID and RFID tags.
c. Mention various components of information security.
d. Explain how sectoring and microcell zone concept improve coverage and capacity
in cellular systems.
e. Compare FDMA and TDMA schemes.
f. Explain mobile application and services.
g. Give the classification of mobile data bases. (74)

Q.2 a. Explain how cell splitting improves coverage and capacity in cellular systems. (6)
b. How does Frequency reuse help channel allocation of cellular systems? (6)

c. A cellular service provider decides to use a digital TDMA scheme which can
tolerate a signal-to-interference ratio of 15 dB in the worst case. Find the optimal
value of N for
(i) omnidirectional antennas,
(ii) 120° sectoring, and
(iii) 60° sectoring.
(Assume a pathloss exponent of n = 4 and consider trunking efficiency.) (6)

Q.3 a. Explain RFID tags based on frequency, application area and power level. (6)
b. Compare Mobile IP and Cellular IP. (6)
c. Explain the features of Wireless Broadband WiMAX. (6)

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