le and the ISRP rule simultaneously, it first evaluates the IARP rule to determine how to route an IP stream. If the IP stream does not match any IARP rules, the mobile evaluates the active ISRP rules to determine how to route the IP stream. 10.1.1.5. WLANSP The WLANSP is a set of rules that determine how the mobile selects a Wi-Fi access network. Figure 10.7 describes the structure of the managed objects (MO) for the WLANSP. Wi-Fi Integration to the 4G Mobile Network Policy RulePriority SelectionCriteria PreferredSSIDList HESSID / SSID / BSSID SPExclusionList RequiredProtoPortTuple MaximumBSSLoadValue MinBackhaulThreshold PreferredRoamingPartnerList HomeNetworkIndication CriteriaPriority PrioritizedAccess AccessTechnology / AccessId / SecondaryAccessId / AccessNetworkPriority ValidityArea 3GPP_Location PLMN / TAC / LAC / GERAN_CI/UTRAN_CI/EUTRA_CI 3GPP2_Location SID / NID / Base_ID Sector ID / Netmask WIMAX Location NAP ID / BS ID WLAN Location HESSID / SSID / BSSID ValidityAreaRef AnchorLatitude Roaming Geo Location Circular AnchorLongitude Radius TimeOfDay TimeStart / TimeStop / DateStart / DateStop / DateOfWeek TimeOfDayRef UpdatePolicy Figure 10.7. WLANSP policy Each WLANSP rule includes the following information: - the conditions indicating when the rule is valid. The conditions of validity can include time, geolocation and location of the network, such as the location area; - the selection criteria that must be fulfilled by the Wi-Fi access network to be eligible, such as cell load or transmission network throughput. 10.1.1.6. Wi-Fi access network preferences Network preferences include information that helps the mobile to select a Wi-Fi access network. The network preferences indicate whether the network prefers the mobile to establish a PDN connection using the S2a architecture. In the case of a PDN connection using the S2b architecture, the network preferences indicate the identity of the evolved packet data gateway (ePDG). Network Discovery and Selection The EHSP (Equivalent Home Service Providers) inf