Wlan and wwan connection migration methods and apparatus

摘要: Intra-enterprise wireless handset (WH) calls between WHs operating in a local area network (WLAN) are established directly the via call connection that is maintained within LAN without being routed through cellular (CN). This eliminates cost of placing and maintaining CN for intra-enterprise calls, also enables use capabilities available enterprise telecomm equipment. Upon detection trigger condition, if when it more likely complete vertical handover (VHO) may be needed, replaced by one CN. Thereafter, VHO occur (if at all) upon radio condition.