School of Specs 24.501v20.0.0

3GPP 24.501 v20.0.0 — the document's own text

9.11.3.96 Extended LADN information

Taught in 4. Inside TS 24.501, the document at the centre (CT1 — the group that writes what your phone says, overview).

The purpose of the Extended LADN information information element is to provide the UE with the LADN service area for each available LADN associated for an LADN DNN and an S-NSSAI in the current registration area or to delete the Extended LADN information at the UE.

The Extended LADN information information element is coded as shown in figure 9.11.3.96.1, figure 9.11.3.96.2 and table 9.11.3.96.1.

The Extended LADN information is a type 6 information element with a minimum length of 3 octets and a maximum length of 1787 octets.

The Extended LADN information information element can contain a minimum of 0 and a maximum of 8 different LADNs each including a DNN, an S-NSSAI and a 5GS tracking area identity list.

87654321
Extended LADN information IEIoctet 1
Length of Extended LADN information contentsoctet 2octet 3
LADN 1octet 4octet a
LADN 2octet a+1*octet b*
…octet b+1*octet g*
LADN noctet g+1*octet h*

Figure 9.11.3.96.1: Extended LADN information information element

87654321
Length of DNN valueoctet 4
DNN valueoctet 5octet m
S-NSSAIoctet m+1octet n
5GS tracking area identity listoctet n+1octet a

Figure 9.11.3.96.2: LADN

Table 9.11.3.96.1: Extended LADN information information element

Value part of the Extended LADN information information element (octet 4 to octet h)The value part of the Extended LADN information information element consists of one or several LADNs. Each LADN (e.g. octet 4 to octet a) consists of one DNN value, one S-NSSAI and one 5GS tracking area identity list. The length of each LADN is determined by the length of DNN value field, the length of S-NSSAI field and the length of 5GS tracking area identity list field.The UE shall store the complete list as received. If more than 8 LADNs are included in this information element, the UE shall store the first 8 LADNs and ignore the remaining octets of the information element.DNN value (octet 5 to octet m):DNN value field is coded as DNN value part of DNN information element as specified in clause 9.11.2.1B starting with the third octet.
S-NSSAI (octet m+1 to n) (see NOTE 1)S-NSSAI is coded as the length and value part of S-NSSAI information element as specified in clause 9.11.2.8 starting with the second octet.5GS tracking area identity list (octet m+1 to octet a):
5GS tracking area identity list field is coded as the length and the value part of the 5GS Tracking area identity list information element as specified in clause 9.11.3.9 starting with the second octet.
NOTE 1: The S-NSSAI included in the Extended LADN information information element shall be an S-NSSAI from, an allowed NSSAI or a partially allowed NSSAI provided to the UE.