pdsn 150 are the point of coupling between wlan 160 and wireless network 100 according to one example ms 112 is operating in cdma2000 network 100 in cell site 121 cell sites 161 and 162 overlap cell site 121 both wireless lan 160 and cdma2000 network 100 are coupled to pdsn 150 ms 112 is currently communicating with bs 101 pdsn 150 monitors the rf link for bsc of bs 101 and the output of wlan 160 if wlan 160 is lightly loaded and cdma2000 network 100 is becoming heavily loaded pdsn 150 sends a notification message to bs 101 to trigger a handoff to wlan 160 wlan 160 operates in a different frequency band than wireless network 100 hence the handoff will be hard handoff the handoff can be performed even if ms 112 determines that the rf link to bs 101 to be of good signal strength this the present invention discloses a forced hard handoff scheme fig2 depicts message flow diagram 200 which illustrates selected control messages in exemplary cdma2000 wireless network according to an exemplary embodiment of the present invention in fig2 it is assumed that pcf unit 190 functionality is integrated into the base station controller bsc portion of bs 101 the present invention may be implemented by adding new throughput request data field to a10 registration request message 205 which is transmitted from bsc pcf 101 190 to pdsn 150 the present invention also adds a new throughput response data field to a11 registration reply message 210 which is transmitted from pdsn 150 to bsc pcf 101 190 finally the present invention adds new signal parameter information related to the access points of wlan 160 to the universal handoff direction message 215 transmitted from bsc pdf 101 190 to.