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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI 600 034
M.Sc. DEGREE EXAMINATION COMPUTER SCIENCE
THIRD SEMESTER NOVEMBER 2017
CS 3822 WIRELESS AND COMMUNICATION NETWORKS
Date: 04-11-2017 Dept. No. Max. 100 Marks
Time: 09:00-12:00
PART-A
Answer All the Questions. 10 X 2=20
1. Define frequency reuse factor?
2. Mention the different types of adhoc wireless network topology?
3. What is CDMA?
4. Write the goal of i-mode technology.
5. Classify the mobile data networks.
6. What are the new elements added to the GSM architecture to support GPRS?
7. What is the difference between an ESS and a BSS in the IEEE802.11?
8. Write the difference between parked node and standby node.
9. Define Encapsulation.
10. List the different messages used for optimization.
PART- B
Answer All the Questions 5 X 8=40
11 Compare Adhoc and infrastructure Topologies in wireless networks.
OR
Explain Handoff decision time algorithms.
12 Discuss the reference architecture of GSM with neat diagram.
OR
Explain the purpose of pilot channels in CDMA with a neat diagram.
13 Discuss the services offered by CDPD and the interfaces used in CDPD.
OR
What is WAP? Explain how internet based applications are adapted to the cellular
system using WAP
14 Explain MAC management of IEEE 802.11.
OR
Discuss Bluetooth architecture with neat diagram.
15 Discuss the entities and terminologies used in mobile IP.
OR
Elaborate the concept and working of snooping TCP with a neat diagram.
PART-C
Answer any TWO Questions. 2 X20=40
16 Discuss the following Cellular concepts
Cellular hierarchy
2
Discuss the following concepts in GSM.
Physical burst
Frame hierarchy
.
17 Write short notes on
i. SMS
ii. GPRS
Elaborate the different frame structures of physical layers of IEEE 802.11
18 Discuss the following in Mobile IP.
Packet delivery
Agent discovery
Discuss different access methods of MAC layer in IEEE 80211.