What is ANDSP (Access Network Discovery and Selection Policy)?

The Access Network Discovery and Selection Policy are used to control UE behaviour related to access network discovery and selection over non-3GPP access networks. It consists of WLAN Selection policy (WLANSP) and Non-3GPP access network (N3AN) node configuration information. WLANSP is used to control UE behavior related to the selection and reselection of a WLAN. It is used by the UE for selecting non-3GPP accesses and for the selection of the N3IWF (Non-3GPP interworking function) in the PLMN.