d for PDN connections, for example, prohibiting the use of the Wi-Fi interface for certain types of access points (APN). The NSWO (Non-Seamless WLAN Offload) rules identify which IP packets should be offloaded by Wi-Fi access to the Internet network without crossing the EPC network. Because streams are not anchored in the EPC network, mobility for each IP stream is not assured between LTE and Wi-Fi accesses. It is possible to restrict or allow the offloading of traffic to specific Wi-Fi access networks. Figure 10.5 describes the structure of managed objects (MO) for NSWO rules. ForNonSeamlessOffload IPFlow App_ID OSApps OSAppId AddressType / StartSourceIPAddress/EndSourceIPAddress / ProtocolType StartSourcePortNumber/EndSourcePortNumber/ StartDestAddress/EndDestAddress / StartDestPortNumber /EndDestPortNumber QoS / DomainName / APN PLMN/TAC/LAC/ GERAN CI RoutingCriteria ValidityArea 3GPP_Location UTRAN_CI/EUTRA_CI SID/NID 3GPP2_Location Base_ID Sector ID Netmask WIMAX_Location NAP_ID/BS_ID WLAN Location HESSID / SSID / BSSID Geo_Location Circular AnchorLatitude AnchorLongitude ValidityAreaRef Radius TimeOfDay TimeStart / TimeStop / DateStart / DateStop / DateOfWeek TimeOfDayRef RANValidityCondition RANValidityConditionRef RoutingRule AccessTechnology / AccessId / SecondaryAccessId / AccessNetworkPriotity RulePriority Figure 10.5. NSWO rules Network Discovery and Selection 10.1.1.4. IARP The IARP (Inter-APN Routing Policy) rules determine which traffic should be routed across different PDN connections and which traffic should be offloaded by Wi-Fi access to the Internet network (Figure 10.6). ForInterAPNRouting see figure 10.3 ForNonSeamlessOffload see figure 10.5 Roaming UpdatePolicy Figure 10.6. IARP rules The rules for the access point (APN) identify a prioritized list of access point names that should be used by the mobile to route traffic that matches IP traffic filters. The rules for NSWO identify which traffic should be offloaded for Wi-Fi access to the Internet network. When the mobile has both the IARP ru