Freedom to choose along-with freedom of mobility

Summary form only given. We present a handover pre-selection strategy, service advertisement and service selection. The handover strategy is used to accomplish seamless cross-network handovers, which supports WLAN and HMIP cells. Users are allowed to select the services from different service providers by the use of service selection algorithm with a call setup procedure. Finally, soft registrations take place to allow terminals to acquire candidate network capability information, service advertisements along with service selection algorithm and handover strategy.