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Which among the following is a constraint observed in hardware constrained MAC protocol for cognitive radio networks?(a) Hidden terminal problem(b) Synchronization among xG users(c) Synchronization between xG user and primary user(d) Shadowing uncertaintyI had been asked this question by my college professor while I was bunking the class.My enquiry is from Next Generation Wireless Network in division Next Generation Wireless Network of Cognitive Radio

Answer»

The correct answer is (a) Hidden terminal problem

Explanation: SENSING in a limited geographic area with a fixed bandwidth limit on secondary users is a challenge for HARDWARE constrained MAC protocol.Thus hidden terminal problem is observed in the hardware constrained MAC protocol. The demand for SYNCHRONIZATION among xG users is a problem of concern for cognitive MAC protocol.



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