A method for handing off a call between networks includes monitoring a
quality of a first link between a mobile station and a wireless local
area network (WLAN) when the mobile station is actively connected with
the WLAN on a call and monitoring a quality of a second link between the
mobile station and a cellular network when the mobile station is actively
connected with the WLAN on the call. The method also includes handing off
the call from the WLAN to the cellular network when the quality of the
first link is less than a handoff trigger threshold for a drop count
duration and when the quality of the second link is greater than a
minimum cellular link quality threshold.