What do you mean by foot print and dwell time?

12. What do you mean by foot print and dwell time?

The region over which the signal strength lies above this threshold value x dB is
known as the coverage area of a BS and it must be a circular region, considering the BS to be isotropic radiator. Such a circle, which gives this actual radio coverage, is called the foot print of a cell.

The time over which a call may be maintained within a cell without hand off is called the dwell time.