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Cognitive Radio
Cognitive Radio Exam
Quiz 1
Solution
Q.1.
What is a non-handoff?
a) xG user selects a channel from the unlicensed band
b) xG user selects a channel in the licensed spectrum band
c) xG user removes another user in the unlicensed band
d) xG user eliminates a primary user in the unlicensed band
Q.2.
What is reactive handoff?
a) xG user performs sensing and sensing is performed before the triggering event
b) xG user performs sensing and sensing is performed after triggering event
c) Primary user performs sensing and sensing is performed before the triggering event
d) Primary user performs sensing and sensing is performed after triggering event
Q.3.
Which among the following is a disadvantage of proactive handoff?
a) High latency
b) Increased number of handoffs
c) Prior planning
d) Unused saved channels
Q.4.
Which among the following is a challenge for spectrum mobility in the time domain?
a) QoS maintenance
b) Cooperative sensing
c) Interference temperature measurement
d) Reconfiguration
Q.5.
Which among the following should be adapted in spectrum mobility management?
a) Single-layer approach
b) Double layer approach
c) Cross-layer approach
d) Alternate layer approach
Q.6.
Which among the following method is suitable for delay-sensitive application?
a) Reactive handoff
b) Proactive handoff
c) Non-handoff
d) High handoff
Q.7.
Which among the following is influenced by spectrum switching time?
a) Transmit time
b) Access time
c) Recovery time
d) Sensing time
Q.8.
Why is inter-cell handoff required?
a) To support spectrum mobility in time domain
b) To support spectrum mobility in frequency domain
c) To support spectrum mobility in the phase domain
d) To support spectrum mobility in space domain
Q.9.
Which among the following is not a challenge of connection management?
a) Estimation of accurate latency
b) Reduction of delay
c) Reduction of loss
d) Maintenance of multiple handoffs
Q.10.
Which among the following is responsible for recovering the routing table in case of route break?
a) xG user
b) xG base-station
c) Primary base-station
d) Spectrum broker
Q.11.
Hybrid handoff is a combination of proactive handoff and reactive handoff.
a) True
b) False
Q.12.
Which among the following should replace the labels ‘A’ and ‘B’?
a) Spectrum management and connection management
b) Spectrum mobility and connection management
c) Connection management and spectrum handoff
d) Spectrum mobility and spectrum handoff
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