7.2.1 Access-Network-Information AVP

32.2993GPPCharging managementDiameter charging applicationsRelease 17Telecommunication managementTS

The Access-Network-Information AVP (AVP code 1263) is of type OctetString and indicates one instance of the SIP P-header "P-Access-Network-Info". In SIP, as per RFC 7315 [404], the content of the "P-Access-Network-Info" header is known as the access-net-spec. When multiple access-net-spec values are transported in a single "P-Access-Network-Info" header in comma-separated format, then multiple Access-Network-Information AVPs are used with one access-net-spec value included in each AVP.

For access types and access classes associated to 3GPP accesses:

– For GERAN access, the cgi-3gpp field contains the CGI;

– For UTRAN access, the utran-cell-id-3gpp field contains the LAI and CI, and the utran-sai-3gpp field contains the SAI;

– For E-UTRAN access, the utran-cell-id-3gpp field contains the TAI and ECGI;

– For NR access, the utran-cell-id-3gpp field contains the TAI and NCI.

The SIP "P-Access-Network-Info" header specified in TS 24.229 [202] clause 7.2A.4 contains in particular:

For access types and access classes associated to trusted WLAN access: the i-wlan-node-id field contains the BSSID, and when available, the operator-specific-GI field contains the Geographical Identifier.

For access types and access classes associated to untrusted WLAN access, the i-wlan-node-id field contains the BSSID, and UE local IP address, ePDG IP Address, and TCP source port, UDP source port are contained in corresponding dedicated fields.