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Which among the following connection is established by xG base-station?

(a) Single hop for xG users

(b) Multi-hop for xG users

(c) Single hop for primary users

(d) Multi-hop for primary users

I have been asked this question during an interview.

This interesting question is from The xG Network Architecture topic in division Next Generation Wireless Network of Cognitive Radio

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Right choice is (a) Single hop for xG users

Easy explanation: xG base-station is capable of providing single hop connection for xG users accessing the licensed portion of the spectrum. It is similar to a primary base-station with fixed network infrastructure network components however it has additional xG capabilities.

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