GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER- VII (New) EXAMINATION — WINTER 2019
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Subject Code: 2170710
Subject Name: Mobile Computing and Wireless Communication
Time: 10:30 AM TO 01:00 PM
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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Q.1 (a) Explain the purpose of Home Location Register (HLR). List the information which is stored in Home Location Register (HLR). [03]
(b) Compare Guided and Unguided media with its applications. [04]
(c) What is wave propagation? Discuss various modes of propagation with example. [07]
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Q.2 (a) Explain the terms with respect to OSI Model : Frame , Packet & Segment [03]
(b) Identify the use of Mobile IP. How does Mobile IP work? [04]
(c) Explain Addresses and Identifiers used in GSM with Example. [07]
OR
(c) Illustrate different scenarios of Roaming and Handoff in GSM with proper Examples. [07]
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Q.3 (a) What is the Nyquist Theorem and Why Does it Matter? [03]
(b) Explain Hidden Station and Exposed Station Problem in wireless network. Propose the solution for the problem. [04]
(c) Describe Cell Splitting and Cell Sectoring with its limitations in detail. [07]
OR
(c) Why Multiplexing is needed in wireless communication and What is the use of Guard band in telecommunication networks? [07]
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Q.4 (a) Draw and Explain IEEE 802.11 protocol architecture. [03]
(b) How Error Control is implemented using Automatic Repeat Request (ARQ) mechanism? [04]
(c) Explain Voice and Data Routing in GPRS with proper diagram. [07]
OR
(c) Differentiate Amplitude, Frequency and Phase Shift Keying in Digital Modulation with proper diagram. [07]
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Q.5 (a) Explain each layer of Bluetooth Protocol Stack. [03]
(b) Compare Paging and Location update in GSM. [04]
(c) Define FHSS. Discuss advantages and applications of FHSS. [07]
OR
(a) State the applications of Bluetooth and differentiate between Piconet and Scatternet with neat diagram. [03]
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(b) Draw and explain MAC frame Format in WLAN. [04]
(c) We have a channel with a 1-MHz bandwidth. The SNR value for this channel is 63. What are the appropriate Bit rate and Signal level using Shannon’s and Nyquist’s Formula? [07]
OR
(a) Describe Android application Architecture. [03]
(b) Enlist and Explain services provided by IEEE 802.11. [04]
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(c) A typical voice channel has SNR as 30dB and Bandwidth as 2.7KHz. Calculate the approximate maximum information capacity of the channel? [07]
OR
(a) Enlist & Explain common layouts available in android. [03]
Date: 28/11/2019
Total Marks: 70
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This download link is referred from the post: GTU BE/B.Tech 2019 Winter Question Papers || Gujarat Technological University
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