Question

What is holding time?

(a) The duration required to identify a spectrum hole

(b) The duration available after the arrival of the primary user to vacate the spectrum band

(c) The duration over which the xG user can use the licensed spectrum band

(d) The duration over which the xG user can use the unlicensed spectrum band

I had been asked this question in an interview for internship.

My question is taken from Next Generation Wireless Network topic in chapter Next Generation Wireless Network of Cognitive Radio

Answer 1

Correct choice is (c) The duration over which the xG user can use the licensed spectrum band

Easiest explanation: Holding time refers to the period over which the xG user can occupy the licensed spectrum band before the arrival of the primary user. High holding time ensures high quality. Statistical handoff patterns are used to construct xG networks with longer holding time.