Patent ID: 6181943
Filing Date: 2001-01-30
Classification: H04W

Abstract:
In a wireless communication system having a base station in communication with a mobile unit at a first frequency, a method for inter-frequency hand-off of a connected call to a new frequency, said method comprising the steps of:comparing, at said mobile unit, a received power at said first frequency to a received power threshold value;tuning said mobile unit to said new frequency to explore said new frequency for a potential hand-off opportunity when said received power at said first frequency is less than said received power threshold value wherein said connected call is continued at said first frequency if said received power at said first frequency is greater than said received power threshold value;comparing a summation of active pilot channels' fractional total power to a pilot power threshold value of said continued connected call, wherein said mobile unit continues said connected call at said first frequency when said summation of active pilot channels' fractional total power is greater than said pilot power threshold value; andtuning to said new frequency to explore said new frequency for a potential hand-off opportunity when said received power at said first frequency is less than said received power threshold value or said summation of active pilot channels' fractional total power is less than said pilot power threshold value.