Question

Which among the following is not a cross-layer design challenge associated with the lower layer of the protocol stack?

a.

Topology configuration

b.

Interference mitigation

c.

Cooperative sensing

d.

Energy consumption

Posted under Cognitive Radio

Answer: (a).Topology configuration Explanation:Spectrum sensing is capable of detecting interference only at the transmitters. Interference measurements should be shared to identify the amount of interference at other users and receivers. This is carried out by cooperative sensing. However cooperative sensing generates large communication overhead that leads to reduced performance in terms of channel capacity and energy consumption.

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Q. Which among the following is not a cross-layer design challenge associated with the lower layer of the protocol stack?

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