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Gujarat Technological UniversitySummer 2025 Examination

GTU 2170710 Mobile Computing and Wireless Communication Summer 2025 Paper Solution & PDF

B.E. · Computer Engineering · Semester 7 · Subject Code: 2170710
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Total Marks70 MarksExternal theory exam
Passing Marks23 Marks33% minimum cutoff
Exam Duration2.5 Hours2:30 PM – 5:00 PM
Paper Structure5 QuestionsWith internal OR choices
Jump toQ1Q2Q3Q4Q5

Question 1

14 MarksMedium
(a)
Explain data rate and bandwidth?
3 Marks
(b)
Enlist and Explain the different modulation techniques in the signal theory.
4 Marks
(c)

Explain the Nyquist Theorem. Find the relationship among the following terms: Channel Capacity (C), Bandwidth (B) and Signal-to-Noise Ratio (SNR).

7 Marks

Question 2

14 MarksMedium
(a)

What is noise? Discuss briefly types of noise and its effect on transmission signal.

3 Marks
(b)

Consider parabolic reflective antenna with a diameter of 4 m, operating at 16 GHz, what is the effective area and antenna gain? (Hint: c= 3x10 8 )

4 Marks
(c)

A TDMA/FDD based GSM system uses 25 MHz for the forward link, which is broken in to radio channels of 200 KHz. If 8 speech channels are supported on a single radio channel and if no guard band is assumed, find the no of simultaneous users that can be accommodated in GSM.

7 Marks
OR OPTION
(c)
What are HLR and VLR? Describe its functions in call routing and roaming.
7 Marks

Question 3

14 MarksMedium
(a)
Define IMSI, IMEI and MS-ISDN and write their use.
3 Marks
(b)
Explain OSI model with function of each layer.
4 Marks
(c)

What is the bandwidth efficiency for FSK, ASK, PSK and QPSK for a bit error rate of 10-7 on a channel with an SNR of 12 dB?

7 Marks
OR OPTION
(a)
Explain frequency reuse in cellular systems with a proper diagram.
3 Marks
(b)

Demonstrate the functioning of a convolutional encoder for (2,1,3) and also implement its state diagram.

4 Marks
(c)

What is the circuit switching? Explain the communication phases of circuit switching. Differentiate between Datagram and Virtual circuit operation?

7 Marks

Question 4

14 MarksMedium
(a)
Explain ATM Service categories.
3 Marks
(b)
What is the need for ARQ? Explain Sliding Window Protocol with example.
4 Marks
(c)
What is Mobile IP? Explain discovery, registration and tunneling in Mobile IP.
7 Marks
OR OPTION
(a)
Write a note on piconet and scatternet.
3 Marks
(b)
For Message M = 1010001101 and Pattern P = 110101, find CRC.
4 Marks
(c)
Write a short note on selective repeat ARQ.
7 Marks

Question 5

14 MarksMedium
(a)
What is fading? Differentiate between:
afast and slow fading
bflat and selective fading
3 Marks
(b)
Name different states of android activity life cycle.
4 Marks
(c)

Define the Frequency Hopping in Spread Spectrum? Write a note on TDMA, FDMA and CDMA.

7 Marks
OR OPTION
(a)
What is Handover? Explain types of it in brief.
3 Marks
(b)
Explain Android EditText and TextView control with an example.
4 Marks
(c)
Draw and explain the Bluetooth Protocol Architecture.
7 Marks
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About this Examination Paper & Attribution

Official Gujarat Technological University (GTU) examination paper and step-by-step solutions for Mobile Computing and Wireless Communication (Summer 2025, B.E. · Computer Engineering, Sem 7). Features complete 70-mark regular & remedial examination pattern, official marking distribution across all 5 questions, and direct 1-click official PDF download.

Transcribed for student exam preparation from Gujarat Technological University official examination archives. Questions, syllabus guidelines, and curriculum marking schemes remain the intellectual property of Gujarat Technological University.

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