ormation contains a list of service providers that are equivalent to the mobile home network. Each service provider is identified with a domain name. The PSPL (Preferred Service Provider List) information contains a preferred list of service providers. HomeNetworkPreference EquivalentHomeSP ServiceProvider PSPLt ServiceProvider/Priority S2aConnectivityPreference 3GPP_RPLMN_Preferred RANMobilitySetUsed PLMN/WLAN Emergency_ePDG_Identifier IPAddr AddressType Address Emergency_ePDG_Identifier IPAddr AddressType Address UpdatePolicy ePDGSelectionInformation PLMN / PLMN_Priority / FQDN Format Figure 10.8. Wi-Fi access network preferences 10.1.2. RAN assistance The evolved node B station (eNB) can provide mobile support information. This information includes the following parameters: - the thresholds for access to the LTE interface; - the thresholds for the Wi-Fi interface; - the offload preference indication (OPI). The thresholds for the LTE interface define the high and low values of the radio parameters, for example, the average value of the preference signal received power (RSRP). The thresholds for the Wi-Fi interface define the high and low values of the access parameters, such as the received signal strength indication (RSSI) of the beacon, the transmission network throughput and the load of the radio channel. 192 Wi-Fi Integration to the 4G Mobile Network The OPI is a one-dimensional bitmap that can be used by mobiles to determine when they should move certain traffic to Wi-Fi access or LTE access. The meaning of each bit is operator specific. The thresholds and parameters can affect the validity of ANDSF rules and thus make these rules subject to the conditions defined by the eNB entity. The thresholds and parameters can be used by the following ANDSF rules: - the ISRP rules, including IFOM rules, MAPCON rules and NSWO rules; - the IARP rules, including rules related to the access point (APN) rules and NSWO. The selection of the Wi-Fi interface and the routing behavior for the mobile must be controlled either b