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Content for  TS 24.501  Word version:  18.0.1

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9.11.3.29  LADN indicationp. 773

The purpose of the LADN indication information element is to request the network for LADN information for specific LADN DNN(s) or to indicate a request for LADN information.
The LADN indication information element is coded as shown in Figure 9.11.3.29.1 and Table 9.11.3.29.1.
The LADN indication is a type 6 information element with a minimum length of 3 octets and a maximum length of 811 octets.
The LADN indication information element can contain a minimum of 0 and a maximum of 8 different LADN DNN values.
Reproduction of 3GPP TS 24.501, Fig. 9.11.3.29.1: LADN indication information element
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Value part of the LADN indication information element (octet 4 to h):
The value part of the LADN indication information element consists of zero or more LADN DNN values. If the LADN indication information element conveys more than 8 LADN DNN values in this information element, the network shall consider the first 8 LADN DNN values and ignore the remaining octets of the information element.
LADN DNN value:
LADN DNN value is coded as the length and value part of DNN information element as specified in subclause 9.11.2.1B starting with the second octet.
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9.11.3.30  LADN informationp. 774

The purpose of the LADN information information element is to provide the UE with the LADN service area for each available LADN in the current registration area or to delete the LADN information at the UE.
The LADN information information element is coded as shown in Figure 9.11.3.30.1, Figure 9.11.3.30.2 and Table 9.11.3.30.1.
The LADN information is a type 6 information element with a minimum length of 3 octets and a maximum length of 1715 octets.
The LADN information information element can contain a minimum of 0 and a maximum of 8 different LADNs each including a DNN and a 5GS tracking area identity list.
Reproduction of 3GPP TS 24.501, Fig. 9.11.3.30.1: LADN information information element
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Reproduction of 3GPP TS 24.501, Fig. 9.11.3.30.2: LADN
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Value part of the LADN information information element (octet 4 to octet h)
The value part of the LADN information information element consists of one or several LADNs. Each LADN (e.g. octet 4 to octet a) consists one DNN value and one 5GS tracking area identity list. The length of each LADN is determined by the length of DNN value 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 subclause 9.11.2.1B starting with the third 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 subclause 9.11.3.9 starting with the second octet.
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9.11.3.31  MICO indicationp. 775

The purpose of the MICO indication information element is to indicate the use of MICO mode or the re-negotiation of MICO mode.
The MICO indication information element is coded as shown in Figure 9.11.3.31.1 and Table 9.11.3.31.1.
The MICO indication is a type 1 information element.
Reproduction of 3GPP TS 24.501, Fig. 9.11.3.31.1: MICO indication
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Registration Area Allocation Indication (RAAI) (octet 1, bit 1)
In the network to UE direction:
0all PLMN registration area not allocated
1all PLMN registration area allocated
In the UE to network direction bit 1 is spare. The UE shall set this bit to zero.
Strictly Periodic Registration Timer Indication (SPRTI) (octet 1, bit 2)
In the network to UE and the UE to network direction:
0strictly periodic registration timer not supported
1strictly periodic registration timer supported
Bits 3 and 4 are spare and shall be coded as zero.
NOTE:
In the network to UE direction in the CONFIGURATION UPDATE COMMAND message, bits 1 and 2 shall be coded as zero.
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9.11.3.31A  MA PDU session information |R16|p. 776

The purpose of the MA PDU session information information element is to convey the MA-related information for the PDU session.
The MA PDU session information information element is coded as shown in Figure 9.11.3.31A.1 and Table 9.11.3.31A.1.
The MA PDU session information is a type 1 information element.
Reproduction of 3GPP TS 24.501, Fig. 9.11.3.31A.1: MA PDU session information information element
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MA PDU session information value (octet 1, bit 1 to bit 4)
Bits
4 3 2 1
0 0 0 0No additional information
0 0 0 1MA PDU session network upgrade is allowed
All other values are spare.
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9.11.3.31B  Mapped NSSAI |R16|p. 776

The purpose of the Mapped NSSAI information element is to transfer S-NSSAI(s) applicable in the HPLMN to the visited PLMN.
The Mapped NSSAI information element is coded as shown in Figure 9.11.3.31B.1, Figure 9.11.3.31B.2 and Table 9.11.3.31B.1.
The Mapped NSSAI is a type 4 information element with a minimum length of 4 octets and a maximum length of 42 octets.
Reproduction of 3GPP TS 24.501, Fig. 9.11.3.31B.1: Mapped NSSAI information element
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Reproduction of 3GPP TS 24.501, Fig. 9.11.3.31B.2: Mapped S-NSSAI content
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Value part of the Mapped NSSAI information element (octet 3 to v)
The value part of the Mapped NSSAI information element consists of one or more mapped S-NSSAI contents. Mapped S-NSSAI content:
Length of S-NSSAI contents (octet 3)
Mapped HPLMN Slice/service type (SST) (octet 4)
This field contains the 8 bit SST value of an S-NSSAI in the S-NSSAI(s) of the HPLMN to which the SST value is mapped. The coding of the SST value part is defined in TS 23.003.
Mapped HPLMN Slice differentiator (SD) (octet 5 to octet 7)
This field contains a 24-bit SD value of an S-NSSAI in the S-NSSAI(s) of the HPLMN to which the SD value is mapped. The coding of the SD value part is defined in TS 23.003.
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9.11.3.31C  Mobile station classmark 2 |R16|p. 777

9.11.3.32  NAS key set identifierp. 777

The NAS key set identifier is allocated by the network.
The NAS key set identifier information element is coded as shown in Figure 9.11.3.32.1 and Table 9.11.3.32.1.
The NAS key set identifier is a type 1 information element.
Reproduction of 3GPP TS 24.501, Fig. 9.11.3.32.1: NAS key set identifier information element
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Type of security context flag (TSC) (octet 1)
Bit
4
0native security context (for KSIAMF)
0mapped security context (for KSIASME)
TSC does not apply for NAS key set identifier value "111".
NAS key set identifier (octet 1)
Bits
3 2 1
0 0 0 -through possible values for the NAS key set identifier
1 1 0
1 1 1no key is available (UE to network);
reserved (network to UE)
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