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 consumptionI got this question by my school teacher while I was bunking the class.My question is taken from Next Generation Wireless Network in chapter Next Generation Wireless Network of Cognitive Radio

Which among the following is not a cross-layer design challenge associ

1.	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 consumptionI got this question by my school teacher while I was bunking the class.My question is taken from Next Generation Wireless Network in chapter Next Generation Wireless Network of Cognitive Radio
Answer» Right option is (a) TOPOLOGY configuration The best 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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