Exam Details
| Subject | wireless communications and networks | |
| Paper | ||
| Exam / Course | b.tech | |
| Department | ||
| Organization | Vardhaman College Of Engineering | |
| Position | ||
| Exam Date | June, 2017 | |
| City, State | telangana, hyderabad |
Question Paper
Hall Ticket No:
Question Paper Code B3407
(AUTONOMOUS) M. Tech II Semester End Semester Regular Examinations, June 2017
(Regulations: VCE-R15) WIRELESS COMMUNICATIONS AND NETWORKS
(Digital Electronics and Communication Systems) Date: 07 June, 2017 FN
Time: 3 hours
Max Marks: 70
Answer any FIVE Questions
Each Question carries equal marks
1.
Describe the cellular concept in mobile communication and illustrate with necessary expressions how the frequency reuse helps in increasing its capacity.
7M
If a signal to interference ratio of 15dB is required for satisfactory forward channel performance of a cellular system, what is the frequency reuse factor and cluster size that should be used for maximum capacity if the path loss exponent is:
i. n=4
ii. n=3
Assume that there are six co-channel cells in the first tier and all of them are at the same distance from the mobile. Use suitable approximations.
7M
2.
Describe the different multiple access techniques used to share the available bandwidth in a wireless communication system with relevant figures.
9M
If a frame uses a frame structure where each frame consists of 8 time slots and each time slot contains 156.25 bits and data is transmitted at 270.833kbps in the channel, find:
i. The time duration of a bit
ii. The time duration of a slot
iii. The time duration of a frame
iv. How long must a user occupying a single time slot must wait between two simultaneous transmissions
5M
3.
Differentiate between the wireless and fixed telephone networks. Illustrate the functionality of the local landline telephone network with a neat figure.
8M
Illustrate the features of X.25 protocol with a neat figure of hierarchy of X.25 in OSI model.
6M
4.
Illustrate the features, functionality and implementation of CCS network architecture with a neat figure.
7M
Examine the various services of SS7 and its advantages over conventional signaling.
7M
5.
Draw a neat figure of mobile IP example network and explain the different entities and terminologies within it to understand the mobile IP.
8M
Illustrate the features, functionality and frame formats of wireless session protocol.
6M
6.
Illustrate the features, functionality and configuration of infrared LAN.
5M
Explain the various services and architecture of IEEE 802.11 with a neat figure.
9M
7.
Examine the Bluetooth base band formats and its fields with a neat figure. Also explain the different logical channels of Bluetooth to carry different types of payload traffic.
7M
Illustrate the link manager specifications of Bluetooth.
7M
8.
Illustrate the features, functionality and services of GPRS.
7M
Examine the functionality and services of mobile application protocol with relevant figure.
7M
Question Paper Code B3407
(AUTONOMOUS) M. Tech II Semester End Semester Regular Examinations, June 2017
(Regulations: VCE-R15) WIRELESS COMMUNICATIONS AND NETWORKS
(Digital Electronics and Communication Systems) Date: 07 June, 2017 FN
Time: 3 hours
Max Marks: 70
Answer any FIVE Questions
Each Question carries equal marks
1.
Describe the cellular concept in mobile communication and illustrate with necessary expressions how the frequency reuse helps in increasing its capacity.
7M
If a signal to interference ratio of 15dB is required for satisfactory forward channel performance of a cellular system, what is the frequency reuse factor and cluster size that should be used for maximum capacity if the path loss exponent is:
i. n=4
ii. n=3
Assume that there are six co-channel cells in the first tier and all of them are at the same distance from the mobile. Use suitable approximations.
7M
2.
Describe the different multiple access techniques used to share the available bandwidth in a wireless communication system with relevant figures.
9M
If a frame uses a frame structure where each frame consists of 8 time slots and each time slot contains 156.25 bits and data is transmitted at 270.833kbps in the channel, find:
i. The time duration of a bit
ii. The time duration of a slot
iii. The time duration of a frame
iv. How long must a user occupying a single time slot must wait between two simultaneous transmissions
5M
3.
Differentiate between the wireless and fixed telephone networks. Illustrate the functionality of the local landline telephone network with a neat figure.
8M
Illustrate the features of X.25 protocol with a neat figure of hierarchy of X.25 in OSI model.
6M
4.
Illustrate the features, functionality and implementation of CCS network architecture with a neat figure.
7M
Examine the various services of SS7 and its advantages over conventional signaling.
7M
5.
Draw a neat figure of mobile IP example network and explain the different entities and terminologies within it to understand the mobile IP.
8M
Illustrate the features, functionality and frame formats of wireless session protocol.
6M
6.
Illustrate the features, functionality and configuration of infrared LAN.
5M
Explain the various services and architecture of IEEE 802.11 with a neat figure.
9M
7.
Examine the Bluetooth base band formats and its fields with a neat figure. Also explain the different logical channels of Bluetooth to carry different types of payload traffic.
7M
Illustrate the link manager specifications of Bluetooth.
7M
8.
Illustrate the features, functionality and services of GPRS.
7M
Examine the functionality and services of mobile application protocol with relevant figure.
7M
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