UNIT-1
WIRELESS
COMMUNICATION FUNDAMENTALS
PART
– A (2 MARKS)
1.
What
are the 3 fundamental propagation behaviors depending on their frequency?
2.
What
is multipath propagation?
3.
What
is guard space?
4.
What
is the 3 different basic schemes analog modulation?
5.
What
is the use of Phase Lock Loop (PLL)?
6.
What
is hopping sequence?
7.
What
is dwell time?
8.
What
are the advantages of cellular systems?
9.
What
is browsing channel allocation and fixed channel allocation?
10. What are the disadvantages of cellular
systems?
11. What is digital sense multiple access?
12. What is Network and Switching
subsystem?
13. What is authentication centre?
14. What is called burst and normal burst?
15. What are the basic groups of logical
channels?
16. Define traffic multi frame and control
multi frame?
17. What is OVSF?
18. Specify the steps perform during the
search for a cell after power on?
19. Explain about transparent mode?
20. What are the basic classes of
handovers?
21. When are tuning frequency and
frequency considered?
22. How can you utilize mobile antennas
efficiently?
23. Compare various modulation techniques.
24. Define the relation between the data
rate and bandwidth. What has harmonics to do with bandwidth?
PART
– B
1.
Discuss
briefly the multiplexing techniques. (16)
2.
Explain
about the signal propagation. (16)
3.
Discuss
about the cellular system. (16)
4.
List
the difference between SDMA /TDMA /FDMA/CDMA. (16)
5.
What
is spread spectrum with its types. (16)
6.
Explain
about the TDMA. (16)
7.
Why
CDMA is needed and explain it with an example? (16)
8.
Why
do MAC scheme in wired network fail in wireless networks and how does the multiple access with collision
avoidance (MACA) scheme work? (16)
9.
Define
modulation and explain the method for analog modulation techniques in details.
(16)
10. Discuss briefly the code division
multiplexing techniques. (16)
11. Discuss briefly the advanced phase
shift keying. (16)
12. a) Explain about cellular wireless
network. (08)
b) Explain about wireless
transmission. (08)
13. Consider three users and Barker code
of six bits each for the users
transmitting the signals, introduce noise and near / far problem
while transmitting and reconstruct the
data in the receiving side providing the
proper counter measures for the complications. (16)
14. a) Table the frequency bands used for
wireless applications with their ranges,
propagation models and applications. (08)
b) Represent diagrammatically the
protocol machines for multiple access with collision avoidance. (08)
UNIT-
2
TELECOMMUNICATION
NETWORKS
PART
– A (2 MARKS)
1.
Specify
the security services offered by GSM.
2.
What
is the frequency range of uplink and downlink in GSM network?
3.
What
are the two basic groups of logical channels in GSM?
4.
What
are the control channel groups in GSM?
5.
List
out the numbers needed to locate an MS and to address the MS.
6.
What
are the four possible handover scenarios in GSM?
7.
What
is meant by GGSN?
8.
What
is meant by SGSN?
9.
What
is meant by BSSGP?
10. Define the protocol architecture of
DECT.
11. Specify the standards offered by
TETRA.
12. How many ITU standardized groups of 3G
radio access technologies are there in
IMT-2000?
13. What are the steps perform during the
search for a cell after power on?
14. What are the two basic classes of
handover?
15. What are the two basic transport
mechanisms used by DAB?
16. What are the two transport modes
defined for MSC?
17. Define the terms: Earth Station and Uplink.
18. Define Elevation Angle.
19. What are the factors limited the
number of sub channels provided within
the satellite channel?
20. Differentiate Broadcast from
Multicast.
21. Detail the features of MSAT.
22. How can an efficient routing be made
in satellite systems?
23. What do you understand by co channel
interference and adjacent?
24. Describe the services provided by GSM
network.
PART
– B
1.
Explain
GSM architecture. (16)
2.
Explain
Satellite networks in detail. (16)
3.
Write
short notes on DAB. (16)
4.
Write
short notes on DVB. (16)
5.
Explain
DECT. (16)
6.
Explain
in details the functioning of GPRS. (16)
7.
Compare
GEO, MEO and LEO (16)
8.
Sketch
the data network in your campus. How many hosts are there and how large is the
user population? What is the speed of the access link to the Internet? How so
you gain access to the Internet? How
much does home access to the Internet costs? (16)
9.
a)
Consider a mobile user who is migrating from a place to another place provide him a seamless service by satellite
system, also sketch the architecture. (08)
b) Discuss the importance of DECT
Protocol Layers. (08)
UNIT-3
WIRELESS
LAN
PART
– A (2 MARKS)
1.
What
are the advantages of WLANS?
2.
Mention
some of the disadvantages of WLANS.
3.
Mention
the design goals of WLANS.
4.
What
is the difference between infrastructure and ad-hoc networks?
5.
Mention
the features of infrared transmission.
6.
What
are the disadvantages of infrared transmission?
7.
Mention
the features of radio transmission.
8.
What
are the disadvantages of radio transmission?
9.
Define
frequency hopping spread spectrum.
10. Define random back off time.
11. What is Traffic Indication Map?
12. What is Delivery Traffic Indication
Map?
13. What is Ad-hoc TIM?
14. What is meant by roaming?
15. Mention the features of HIPERLAN1.
16. What are the three phases of medium
access in EY-NPMA?
17. Mention the elements of Bluetooth core
protocols.
18. What is the purpose of sniff state?
19. What is the use of hold state?
20. What is the purpose of park state?
21. In what functionality Switches differ
from Routers.
PART
– B
1.
Explain
the architecture and features of IEEE 802.11 in details. (16)
2.
Explain
the MAC layer in IEEE802.11. (16)
3.
Explain
HIPERLAN in detail. (16)
4.
Write
short notes on Bluetooth. (16)
5.
Explain
the service offered by IEEE802.11 standard. (16)
6.
Explain
how power management is done in IEEE 802.11 infrastructure based and ad hoc
networks. (16)
7.
Discuss
how to increase the quality of service in an ad hoc network. (16)
8.
a)
Detail the time- bounded service on top of the standard DCF mechanism where ad
hoc networks cannot use the function. (08)
b) Discuss the PHY frame format of an
IEEE 802.11 using the spread spectrum technique which separates by code. (08)
9.
a)
The channel access control sublayer of HIPERLAN offers a connectionless data transfer service to the
higher MAC layer. Justify the above statement
with related references. (08)
b) Discuss the functionalities and
support provided by L2CAP. (08)
UNIT
- 4
MOBILE
NETWORK LAYER
PART
– A (2 MARKS)
1.
What
are the requirements of mobile IP?
2.
Mention
the different entities in a mobile IP.
3.
What
do you mean by mobility binding?
4.
Define
a tunnel.
5.
What
is encapsulation?
6.
What
is decapsulation?
7.
Define
an outer header
8.
Define
an inner header.
9.
What
is meant by generic routing encapsulation?
10. What is the use of network address
translation?
11. Define triangular routing.
12. What is meant by a binding cache?
13. Define binding request.
14. What is known as Binding update?
15. Explain binding acknowledgement.
16. Define binding warning.
17. Explain cellular IP.
18. What are the advantages of cellular
IP?
19. What is known as mobility anchor
point?
20. Explain destination sequence distance
vector routing.
21. What are the two things added to the
distance vector algorithm?
22. How the dynamic source routing does
divide the task of routing into two separate problems?
PART
– B
1.
a)
What are the requirements of a mobile IP? (08)
b) Describe Dynamic host configuration
protocol. (08)
2.
a)
Discuss the routing algorithm in ad-hoc network. (08)
b) What are the entities in mobile IP?
(08)
3.
a)
Discuss how optimization in achieved in mobile IP. (08)
b) Explain tunneling and encapsulation
in mobile IP. (08)
4.
Explain
how dynamic source routing protocols handles routing with an example. (16)
5.
Discuss
and detail the differences in topology reorganization in DSDV and DSR routing
protocols. (16)
6.
a)
What are the general problems of mobile IP regarding security and support of
quality of service? (08)
b) Name the inefficiencies of mobile
IP regarding data forwarding from a correspondent node to a mobile node. What
are optimizations and what additional problems do they cause? (08)
UNIT-
5
TRANSPORT
AND APPLICATION LAYERS
PART
– A (2 MARKS)
1.
What
is slow start?
2.
What
is the use of congestion threshold?
3.
What
led to the development of Indirect TCP?
4.
What
is the goal of M-TCP?
5.
What
do you mean by persistent mode?
6.
What
are the characteristics of 2.5G/3.5G wireless networks?
7.
What
are the configuration parameters to adapt TCP to wireless environments?
8.
State
the requirements of WAP.
9.
Name
the layers of WAP.
10. Name some ICMP messages.
11. What is WTP? What are its classes?
12. What is WSP?
13. Name some features of WSP adapted to
web browsing.
14. What is WML?
15. What are the features of WML?
16. What are the advantages of WML Script
over WML?
17. Name the libraries specified by WML
Script.
18. What are the classes of libraries?
19. Name the operations performed by PAP.
20. What are the components of WAP2.0?
21. How and why does I-TCP isolate
problems on the wireless link?
PART
– B
1.
Explain
in detail about traditional TCP in details. (16)
2.
Explain
classical TCP improvements and snooping TCP. (16)
3.
Explain
the function of the components of the WAP architecture. (16)
4.
Explain
the concept of wireless markup language. (16)
5.
Explain
wireless application protocols with its version WAP 2.0 in detail. (16)
6.
Describe
the operation of the window flow control mechanism. (16)
7.
What
are the major difference between WAP 2.0 and WAP 1.x? What influenced the WAP
2.0 development? (16)
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