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WorksheetsWC Unit 1 Review Quiz
Total questions: 50
Worksheet time: 25mins
Why hexagonal shape is used for a cell?
Its beautiful
Larger area
more number of sides
Smaller area
What is the backbone of cellular network?
MS
BTS
BSC
MSC
The cellular concept offered (Select all suitable choices)
very high capacity
good image compression
solution to solve the problem of spectral congestion
AI based solution for water distribution
Select the different Channel Assignment Strategies (Select all suitable choices)
Fixed Channel Assignment Strategy
Fast Channel Assignment Strategy
Dynamic Channel Assignment Strategy
Domestic Channel Assignment Strategy
The process of transferring a mobile station from one base station to another is ____________
MSC
Roamer
Handoff
Forward channel
Paging system uses which mode of transmission?
Full duplex
Simplex
Half Duplex
Duplex
The network shown in the image is an example of ___
WLAN
PAN
VAN
WAN
Which is one of the disadvantages of 2G standards?
Short Messaging Service (SMS)
Digital modulation
Limited capacity
Limited Internet Browsing
2G CDMA standard, IS-95, was proposed by which company?
Nippon Telephone and Telegraph (NTT)
Qualcomm
Bellcore and Motorola
AT&T Bell Laboratories
Which of the following is not a standard of 3G?
UMTS
Cdma2000
TD-SCDMA
LTE
In a communications system, noise is most likely to affect the signal
at the transmitter
in the channel
in the information source
at the destination
Full duplex operation
requires two pairs of cables
can transfer data in both directions at once
requires modems at both ends of the circuit
all of the above
The carrier frequency is usually lower than the modulating frequency.
TRUE
FALSE
The electromagnetic spectrum is managed worldwide by the_____ organization.
FCC
ITU
NTC
NTIA
The regulatory body for electronic communications in the United States is the _____.
NTC
ITU
NTIA
FCC
The process of transmitting two or more baseband signals simultaneously over a common medium is called _____
Multiplexing
Demodulation
Modulation
Talking
Which of the following is not considered as one of the basic elements of communication system?
Transmitter
Receiver
Noise
Medium
Cellular concept replaces many low power transmitters to a single high power transmitter.
True
False
Why neighbouring stations are assigned different group of channels in cellular system?
To minimize interference
To minimize area
To maximize throughput
To maximize capacity of each cell
What is frequency reuse?
Process of selecting and allocating channels
Process of selection of mobile users
Process of selecting frequency of mobile equipment
Process of selection of number of cells
Actual radio coverage of a cell is called __________
Fingerprint
Footprint
Imprint
Matrix
Which type of antenna is used for center excited cells?
Dipole antenna
Grid antenna
Sectored antenna
Omnidirectional antenna
What is a cluster in a cellular system?
Group of frequencies
Group of cells
Group of subscribers
Group of mobile systems
Capacity of a cellular system is directly proportional to __________
Number of cells
Number of times a cluster is replicated
Number of Base stations
Number of users
The choice of channel assignment strategy does not impact the performance of the system.
True
False
What happen to a call in fixed channel strategy, if all the channels in a cell are occupied?
Queued
Cross talk
Blocked
Delayed
What is a borrowing strategy in fixed channel assignments?
Borrowing channels from neighbouring cell
Borrowing channels from neighbouring cluster
Borrowing channels from same cell
Borrowing channels from other base station in same cell
In dynamic channel assignment strategy, base station requests channel from ____________
MSC
Neighbouring cell
Neighbouring cluster
Neighbouring base station
RSSI stands for ________
Radio System Signal Indicator
Restricted Signal Strength Indicator
Radio Signal Strength Indication
Restricted System Software Indicator
What is the drawback of dynamic channel assignment?
Decrease channel utilization
Increase probability of blocked call
Cross talk
Increase storage and computational load on system
MAHO stands for ______
MSC assisted handoff
Mobile assisted handoff
Machine assisted handoff
Man assisted handoff
What is the condition for handoff?
A mobile moves into a different cell while in conversation
A mobile remains in the same cell while in conversation
A mobile moves to different cell when idle
A mobile remains in the same cell and is idle
The time over which a call can be maintained within a cell without handoff is called _________
Run time
Peak time
Dwell time
Cell time
Umbrella cell approach is possible by using _________
Antenna of same heights
Antenna of different heights
Different voice channels
Different control channels
Cell dragging is a problem occur due to __________
Pedestrian users
Stationary users
High speed mobile systems
Base stations having same frequency
Soft handoff is also known as _________
MAHO
Hand over
Break before make
Make before break
Interference on voice channels causes _______
Blocked calls
Cross talk
Queuing
Missed calls
Interference in control channel leads to ________
Cross talk
Queuing
Blocked calls
Voice traffic
What are co-channel cells?
Cells having different base stations
Cells using different frequency
Cells using adjacent frequency
Cells using same frequency
Co-channel reuse ratio is define by _________
Q=D*R
Q=D/R
Q=D^R
Q=1/R
What is breathing cell effect?
Fixed coverage region
Dynamic and time varying coverage region
Large coverage region
Very small coverage region
Adjacent channel interference can be minimized through _______
Changing frequency of base stations
Careful filtering and channel assignments
Increasing number of base stations
Increasing number of control channels
Which of the following techniques do not help in expanding the capacity of cellular system?
Sectoring
Scattering
Splitting
Microcell zone concept
________ uses directional antennas to control interference.
Sectoring
Cell splitting
Repeaters
Micro cell zone concept
_______ allows an orderly growth of cellular system.
Sectoring
Scattering
Cell splitting
Micro cell zone technique
Which of the following technology distributes the coverage of the cell and extends the cell boundary to hard-to-reach places?
Cell splitting
Scattering
Sectoring
Micro cell zone concept
Which of the following increases the number of base stations in order to increase capacity?
Cell splitting
Sectoring
Repeaters
Micro cell zone concept
Cell splitting increases the capacity of a cellular system since it increases the number of times ________ are reused.
Cells
Channels
Transmitters
Mobile stations
Sectoring increases SIR (Signal to Interference Ratio).
True
False
Repeaters has one drawback of reradiating ____________
Frequency
Channels
Power
Noise and interference
