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TS 24.312CT1
Access Network Discovery and Selection Function (ANDSF)
Management Object (MO)

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Rapporteur:  Mr. Sedlacek, Ivo

This TS defines management objects that can be used by the Access Network Discovery and Selection Function (ANDSF) and the UE.
The ANDSF MO is used to manage Inter-System Mobility Policy (ISMP), Inter-System Routing Policy (ISRP), Inter-APN Routing Policy (IARP), RuleSelectionInformation and WLAN Selection Policy (WLANSP) as well as access network discovery information stored in a UE supporting provisioning of such information from an ANDSF. In addition, the ANDSF MO is also used to manage the HomeNetworkPreference policy stored in a UE supporting provisioning of Preferred Service Provider List (PSPL) and S2a Connectivity Preference information from an ANDSF.
The ANDSF may initiate the provision of information from the ANDSF to the UE as specified in TS 24.302.
If the UE wishes to provide the user location information to the ANDSF when sending the Package 1 (see OMA-TS-DM_Protocol-V1_2]), the UE shall include in the Package 1 a Generic Alert message (along with other commands) where the "Type" element is set to "urn:oma:at:ext-3gpp-andsf:1.0:ue_location", the "Data" element is set to the information contained in the UE_Location node subtree (see subclause 5.6) encoded as XML formatted as specified by OMA-TS-DM_TNDS-V1_2 and the "LocURI" element (inside the "Source" element) is set to the address of the ANDSF Management Object as specified by OMA-TS-DM_Protocol-V1_2.
If the UE wishes to provide the UE profile information to the ANDSF while sending Package 1 (see OMA-TSDM_Protocol-V1_2), the UE shall include in Package 1 a Generic Alert message (along with other commands) where the "Type" element is set to "urn:oma:at:ext-3gpp-andsf:1.0:ue_profile", the "Data" element is set to the information contained in the UE_Profile node subtree (see subclause 5.7A) encoded as XML formatted as specified by OMA-TS-DM_TNDS-V1_2 and the "LocURI" element (inside the "Source" element) is set to the address of the ANDSF Management Object as specified by OMA-TS-DM_Protocol-V1_2.
The UE may initiate the provision of all available information from the ANDSF, using a client-initiated session Alert message of code "Generic Alert" (see OMA-TS-DM_Protocol-V1_2). When requesting all available information from ANDSF, the "Type" element of the OMA DM generic alert message shall be set to "urn:oma:at:ext-3gppandsf:1.0:provision", the "LocURI" element (inside the "Source" element) shall be set to the address of the ANDSF Management Object as specified by OMA-TS-DM_Protocol-V1_2 and the "Data" element is not included
When the UE is requesting partial ANDSF information, i.e. ISMP, Discovery information or ISRP as defined in subclauses 4.1.2, 4.1.3 and 4.1.5 respectively, the ANDSF server should provide the requested ANDSF information to the UE. Additionally, the ANDSF server may provide other than the requested ANDSF information during the same ANDSF session.
ISMP prioritizes access networks when the UE is not capable to connect to the EPC through multiple accesses. ISRP indicates how to distribute traffic among available accesses when the UE is capable to connect to the EPC through multiple accesses (i.e. the UE is configured for IFOM, MAPCON, non-seamless WLAN offload or any combination of these capabilities). IARP indicates which traffic should be routed across different PDN connections and which traffic should be non-seamlessly offloaded to WLAN. DiscoveryInformation provides further information for the UE to access the access network defined in the ISMP or in the ISRP. WLANSP provides information for the UE to select and reselect a WLAN. RuleSelectionInformation indicates whether to prioritise ISMP, ISRP and WLANSP provided by HPLMN or by VPLMN when the UE is roaming and ANDSF rules are available from both HPLMN and VPLMN. The PSPL in HomeNetworkPreference is used by the UE to determine the selected service provider in order to construct NAI (see RFC 4282) to perform 3GPP-based access authentication over the selected WLAN as specified in TS 23.402. HomeNetworkPreference policy also contains S2a Connectivity Preference which is used to indicate whether or not the home operator prefers the UE to establish PDN connections over WLAN by using the applicable S2a procedures specified in TS 23.402.
The MO defines validity areas, position of the UE and availability of access networks in terms of geographical coordinates. The way such coordinates are retrieved is implementation dependant (e.g. GPS receiver).
The UE is not required to switch on all UE's supported radios for deducing its location for ANDSF purposes or for evaluating the validity area condition of a policy or discovery information.
The Management Object Identifier is: urn:oma:mo:ext-3gpp-andsf:1.0.
The OMA DM Access Control List (ACL) property mechanism as standardized (see Enabler Release Definition OMAERELD-DM-V1_2) may be used to grant or deny access rights to OMA DM servers in order to modify nodes and leaf objects of the ANDSF MO.
The UE shall ignore any node which is a child of the ANDSF MO root node and is not supported by the UE. The ANDSF server shall ignore any node which is a child of the ANDSF MO root node and is not supported by the ANDSF server.
The UE shall support receiving OMA DM commands with bodies encoded as XML formatted as described in OMATS-DM_TNDS-V1_2.
Validity criteria container of the ANDSF MO enables reducing redundancies in ANDSF MO.