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Which among the following method is suitable for delay-sensitive application?

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Which among the following method is suitable for delay-sensitive application?

(a) Reactive handoff

(b) Proactive handoff

(c) Non-handoff

(d) High handoff

I had been asked this question during an online interview.

The above asked question is from Next Generation Wireless Network topic in section Next Generation Wireless Network of Cognitive Radio

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The correct option is (b) Proactive handoff

The explanation is: In the proactive handoff, the xG user continues to sense during transmission, and the handoff is carried out prior to the triggering event. In reactive handoff, the xG user begins to sense for other bands only after the triggering event. Proactive handoff is suitable for delay-sensitive application.

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