HANDOVER FROM 3GPP TO UNTRUSTED NON-3GPP ACCESS BASED ON MEASURED COMMUNICATION PATH CHARCTERISTICS

摘要

The invention relates to a mobile terminal (101, 105) and a method of determining whether to perform handover of the mobile terminal in a wireless communications network from a radio access network (102), e.g. E-UTRAN, to an untrusted wireless local area network (103), e.g. WLAN. The method of determining whether to perform handover of a mobile terminal (101) in a wireless communications network from a radio access network (102) to a wireless local area network (103) comprises measuring (S101) a physical property of a communication path established between the mobile terminal (101) and a packet core network gateway node ePDG (105) via the wireless local area network (103), determining (S102) whether the measured physical property complies with at least one communication path quality criterion; and if so performing (S103) handover of the mobile terminal (101) from the radio access network (102) to the wireless local area network (103). Additionally, after having performed selection of a packet core network gateway node ePDG (105), authentication with the selected packet core network gateway node ePDG (105) may be performed and the measuring activity may be carried out before, during or after said authentication.