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Content for  TS 24.501  Word version:  19.0.0

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9.11.3.4 5GS mobile identity  9.11.3.5 5GS network feature support  9.11.3.6 5GS registration result  9.11.3.7 5GS registration type 
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9.11.3.4  5GS mobile identity  p. 874

The purpose of the 5GS mobile identity information element is to provide either the SUCI, the 5G-GUTI, the IMEI, the IMEISV, the 5G-S-TMSI, the MAC address or the EUI-64.
The 5GS mobile identity information element is coded as shown in Figure 9.11.3.4.1, Figure 9.11.3.4.2, Figure 9.11.3.4.3, Figure 9.11.3.4.4, Figure 9.11.3.4.5, Figure 9.11.3.4.6, Figure 9.11.3.4.7 and Figure 9.11.3.4.8, and Table 9.11.3.4.1.
The 5GS mobile identity is a type 6 information element with a minimum length of 4.
Reproduction of 3GPP TS 24.501, Fig. 9.11.3.4.1: 5GS mobile identity information element for type of identity
Figure 9.11.3.4.1: 5GS mobile identity information element for type of identity "5G-GUTI"
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Reproduction of 3GPP TS 24.501, Fig. 9.11.3.4.2: 5GS mobile identity information element for type of identity
Figure 9.11.3.4.2: 5GS mobile identity information element for type of identity "IMEI" or "IMEISV"
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Reproduction of 3GPP TS 24.501, Fig. 9.11.3.4.3: 5GS mobile identity information element for type of identity
Figure 9.11.3.4.3: 5GS mobile identity information element for type of identity "SUCI" and SUPI format "IMSI"
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Reproduction of 3GPP TS 24.501, Fig. 9.11.3.4.3a: Scheme output for type of identity
Figure 9.11.3.4.3a: Scheme output for type of identity "SUCI", SUPI format "IMSI" and Protection scheme Id "Null scheme"
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Reproduction of 3GPP TS 24.501, Fig. 9.11.3.4.4: 5GS mobile identity information element for type of identity
Figure 9.11.3.4.4: 5GS mobile identity information element for type of identity "SUCI" and SUPI format "Network specific identifier", "GCI" or "GLI"
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Reproduction of 3GPP TS 24.501, Fig. 9.11.3.4.5: 5GS mobile identity information element for type of identity
Figure 9.11.3.4.5: 5GS mobile identity information element for type of identity "5G-S-TMSI"
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Reproduction of 3GPP TS 24.501, Fig. 9.11.3.4.6: 5GS mobile identity information element for type of identity
Figure 9.11.3.4.6: 5GS mobile identity information element for type of identity "No identity"
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Reproduction of 3GPP TS 24.501, Fig. 9.11.3.4.7: 5GS mobile identity information element for type of identity
Figure 9.11.3.4.7: 5GS mobile identity information element for type of identity "MAC address"
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Reproduction of 3GPP TS 24.501, Fig. 9.11.3.4.8: 5GS mobile identity information element for type of identity
Figure 9.11.3.4.8: 5GS mobile identity information element for type of identity "EUI-64"
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Type of identity (octet 4)
Bits
3 2 1
0 0 0No identity (see NOTE 1)
0 0 1SUCI
0 1 05G-GUTI
0 1 1IMEI
1 0 05G-S-TMSI
1 0 1IMEISV
1 1 0MAC address
1 1 1EUI-64
All other values are reserved.
Odd/even indication (octet 4)
Bit
4
0even number of identity digits
1odd number of identity digits
For the 5G-GUTI, then bits 5 to 8 of octet 4 are coded as "1111", octet 5 through 7 contain the MCC and MNC values as specified below, octet 8 through 10 contain the AMF Region ID, the AMF Set ID and the AMF Pointer values and octet 11 through 14 contain the 5G-TMSI as defined in TS 23.003.
MCC, Mobile country code (octet 5, octet 6 bits 1 to 4)
The MCC field is coded as in ITU-T Recommendation E.212 [42], Annex A.
MNC, Mobile network code (octet 6 bits 5 to 8, octet 7)
The coding of this field is the responsibility of each administration but BCD coding shall be used. The MNC shall consist of 2 or 3 digits. If a network operator decides to use only two digits in the MNC, bits 5 to 8 of octet 6 shall be coded as "1111".
The MCC and MNC digits are coded as octets 6 to 8 of the Temporary mobile group identity IE in Figure 10.5.154 of TS 24.008.
AMF Region ID (octet 8)
This field contains the binary encoding of the AMF Region ID. Bit 8 of octet 7 is the most significant bit and bit 1 of octet 7 is the least significant bit.
AMF Set ID (octet 9, octet 10 bits 7 to 8)
This field contains the binary encoding of the AMF Set ID. Bit 8 of octet 9 is the most significant bit and bit 7 of octet 10 is the least significant bit.
AMF Pointer (octet 10 bits 1 to 6)
This field contains the binary encoding of the AMF Pointer. Bit 6 of octet 9 is the most significant bit and bit 1 of octet 9 is the least significant bit.
5G-TMSI (octet 11 to 14)
Bit 8 of octet 11 is the most significant bit and bit 1 of octet 14 is the least significant bit.
Identity digit (octet 4 bits 5 to 8, octet 5 etc.)
For the IMEI, Identity digit field is coded using BCD coding. If the number of identity digits is even then bits 5 to 8 of the last octet shall be filled with an end mark coded as "1111". The format of the IMEI is described in TS 23.003.
For the IMEISV, Identity digit field is coded using BCD coding. Bits 5 to 8 of the last octet shall be filled with an end mark coded as "1111". The format of the IMEISV is described in TS 23.003.
For the SUCI, bit 8 of octet 4 is spare and shall be coded as zero. Bits 5-7 of octet 4 contain the SUPI format and are coded as shown below.
SUPI format (octet 4, bits 5-7)
Bits
7 6 5
0 0 0IMSI
0 0 1Network specific identifier
0 1 0GCI
0 1 1GLI
All other values are interpreted as IMSI by this version of the protocol.
For the SUCI with SUPI format "IMSI", octets 5 through 7 contain the MCC and MNC values as specified below. For subsequent fields, bit 8 of octet 8 is the most significant bit and bit 1 of the last octet the least significant bit. The required fields for the SUCI are as defined in TS 23.003.
MCC, Mobile country code (octet 5, octet 6 bits 1 to 4)
The MCC field is coded as in ITU-T Recommendation E.212 [42], Annex A.
MNC, Mobile network code (octet 6 bits 5 to 8, octet 7)
The coding of this field is the responsibility of each administration but BCD coding shall be used. The MNC shall consist of 2 or 3 digits. If a network operator decides to use only two digits in the MNC, bits 5 to 8 of octet 6 shall be coded as "1111".
The MCC and MNC digits are coded as octets 6 to 8 of the Temporary mobile group identity IE in Figure 10.5.154 of TS 24.008.
Routing indicator (octets 8-9)
Routing Indicator shall consist of 1 to 4 digits. The coding of this field is the responsibility of home network operator but BCD coding shall be used. If a network operator decides to assign less than 4 digits to Routing Indicator, the remaining digits shall be coded as "1111" to fill the 4 digits coding of Routing Indicator (see NOTE 2). If no Routing Indicator is configured in the USIM or the ME, the UE shall code bits 1 to 4 of octet 8 of the Routing Indicator as "0000" and the remaining digits as "1111".
Protection scheme identifier (octet 10 bits 1 to 4)
Bits
4 3 2 1
0 0 0 0Null scheme
0 0 0 1ECIES scheme profile A
0 0 1 0ECIES scheme profile B
0 0 1 1 -
1 0 1 1		Reserved
1 1 0 0 -
1 1 1 1		Operator-specific protection scheme
Bits 5-8 of octet 10 are spare and shall be coded as zero.
Home network public key identifier (octet 11)
The Home network public key identifier (PKI) field is coded as defined in TS 23.003. Home network public key identifier shall be coded as "00000000" when Protection scheme identifier is set to "0000" (i.e. Null scheme).
Bits
8 7 6 5 4 3 2 1
0 0 0 0 0 0 0 0Home network PKI value 0
0 0 0 0 0 0 0 1 -Home network PKI value (1-254)
1 1 1 1 1 1 1 0
1 1 1 1 1 1 1 1Reserved
Scheme output (octets 12 to x)
The Scheme output field consists of a string of characters with a variable length or hexadecimal digits as specified in TS 23.003. If Protection scheme identifier is set to "0000" (i.e. Null scheme), then the Scheme output consists of the MSIN and is coded using BCD coding with each digit of the MSIN coded over 4 bits. If the MSIN includes an odd number of digits, bits 5 to 8 of octet x shall be coded as "1111". If Protection scheme identifier is not "0000" (i.e. ECIES scheme profile A, ECIES scheme profile B or Operator-specific protection scheme), then Scheme output is coded as hexadecimal digits.
For the SUCI with SUPI format set to "Network specific identifier", the SUCI NAI field contains an NAI constructed as specified in subclause 28.7.3 of TS 23.003 and encoded as UTF-8 string.
For the SUCI with SUPI format set to "GCI", the SUCI NAI field contains an NAI constructed as specified in subclause 28.15.5 of TS 23.003 and encoded as UTF-8 string.
For the SUCI with SUPI format set to "GLI", the SUCI NAI field contains an NAI constructed as specified in subclause 28.16.5 of TS 23.003 and encoded as UTF-8 string.
For the 5G-S-TMSI, bits 5 to 8 of octet 4 are coded as "1111". The coding of the 5G-S-TMSI is left open for each administration.
AMF Set ID (octet 5, octet 6 bits 7 to 8)
This field contains the binary encoding of the AMF Set ID. Bit 8 of octet 5 is the most significant bit and bit 7 of octet 6 is the least significant bit.
AMF Pointer (octet 6 bits 1 to 6)
This field contains the binary encoding of the AMF Pointer. Bit 6 of octet 6 is the most significant bit and bit 1 of octet 6 is the least significant bit.
5G-TMSI (octet 7 to 10)
Bit 8 of octet 7 is the most significant bit and bit 1 of octet 10 is the least significant bit.
For Type of identity "No identity", the length of mobile identity contents parameter shall be set to 1 and the bits 4-8 of octet 4 are spare and shall be coded as zero.
MAC address usage restriction indication (MAURI) (octet 4 bit 4)
Bit
4
0No restrictions
1MAC address is not usable as an equipment identifier
MAC address (octets 5 to 10)
This field contains the MAC address as defined in subclause 8 of IEEE Std 802 [43].
Bit 8 of octet 5 is the most significant bit and bit 1 of octet 10 is the least significant bit.
EUI-64 (octets 5 to 12)
This field contains an EUI-64 as defined in [48].
Bit 8 of octet 5 is the most significant bit and bit 1 of octet 12 is the least significant bit.
NOTE 1:
This can be used when the requested identity is not available at the UE during the identification procedure.
NOTE 2:
For a 3-digit Routing Indicator, e.g "567", bits 1 to 4 of octet 8 are coded as "0101", bits 5 to 8 of octet 8 are coded as "0110", bits 1 to 4 of octet 9 are coded as "0111", bits 5 to 8 of octet 9 are coded as "1111".
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9.11.3.5  5GS network feature support  p. 880

The purpose of the 5GS network feature support information element is to indicate whether certain features are supported by the network.
The 5GS network feature support information element is coded as shown in Figure 9.11.3.5.1 and Table 9.11.3.5.1.
The 5GS network feature support is a type 4 information element with a minimum length of 3 octets and a maximum length of 6 octets.
If:
  • the length of 5GS network feature support contents field is set to one, then the UE shall interpret this as a receipt of an information element with all bits of octet 4, octet 5 and octet 6 coded as zero.
  • the length of 5GS network feature support contents field is set to two, the UE shall interpret this as a receipt of an information element with all bits of octet 5 and octet 6 coded as zero.
  • the length of 5GS network feature support contents field is set to three, the UE shall interpret this as a receipt of an information element with all bits of octet 6 coded as zero.
Reproduction of 3GPP TS 24.501, Fig. 9.11.3.5.1: 5GS network feature support information element
Figure 9.11.3.5.1: 5GS network feature support information element
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IMS voice over PS session over 3GPP access indicator (IMS-VoPS-3GPP) (octet 3, bit 1)
This bit indicates the support of IMS voice over PS session over 3GPP access (see NOTE 1).
0IMS voice over PS session not supported over 3GPP access
1IMS voice over PS session supported over 3GPP access
IMS voice over PS session over non-3GPP access indicator (IMS-VoPS-N3GPP) (octet 3, bit 2)
This bit indicates the support of IMS voice over PS session over non-3GPP access.
0IMS voice over PS session not supported over non-3GPP access
1IMS voice over PS session supported over non-3GPP access
Emergency service support indicator for 3GPP access (EMC) (octet 3, bit 3 and bit 4)
These bits indicate the support of emergency services in 5GS for 3GPP access (see NOTE 1).
Bits
4 3
0 0Emergency services not supported
0 1Emergency services supported in NR connected to 5GCN only
1 0Emergency services supported in E-UTRA connected to 5GCN only
1 1Emergency services supported in NR connected to 5GCN and E-UTRA connected to 5GCN
Emergency services fallback indicator for 3GPP access (EMF) (octet 3, bit 5 and bit 6)
These bits indicate the support of emergency services fallback for 3GPP access (see NOTE 1).
Bits
6 5
0 0Emergency services fallback not supported
0 1Emergency services fallback supported in NR connected to 5GCN only
1 0Emergency services fallback supported in E-UTRA connected to 5GCN only
1 1Emergency services fallback supported in NR connected to 5GCN and E-UTRA connected to 5GCN
Interworking without N26 interface indicator (IWK N26) (octet 3, bit 7)
This bit indicates whether interworking without N26 interface is supported.
0Interworking without N26 interface not supported
1Interworking without N26 interface supported
MPS indicator (MPSI) (octet 3, bit 8)
This bit indicates the validity of MPS.
0Access identity 1 not valid
1Access identity 1 valid
Emergency service support for non-3GPP access indicator (EMCN3) (octet 4, bit 1)
This bit indicates the support of emergency services in 5GS for non-3GPP access.
Bit (see NOTE 2)
1
0Emergency services not supported over non-3GPP access
1Emergency services supported over non-3GPP access
MCS indicator (MCSI) (octet 4, bit 2)
This bit indicates the validity of MCS.
0Access identity 2 not valid
1Access identity 2 valid
Restriction on enhanced coverage (RestrictEC) (octet 4, bit 3 and bit 4)
These bits indicate enhanced coverage restricted information.
In WB-N1 mode these bits are set as follows:
Bits
4 3
0 0Both CE mode A and CE mode B are not restricted
0 1Both CE mode A and CE mode B are restricted
1 0CE mode B is restricted
1 1Reserved
In NB-N1 mode these bits are set as follows
Bits
4 3
0 0Use of enhanced coverage is not restricted
0 1Use of enhanced coverage is restricted
1 0Reserved
1 1Reserved
Control plane CIoT 5GS optimization (5G-CP CIoT) (octet 4, bit 5)
This bit indicates the capability for control plane CIoT 5GS optimization.
0Control plane CIoT 5GS optimization not supported
1Control plane CIoT 5GS optimization supported
N3 data transfer (N3 data) (octet 4, bit 6)
This bit indicates the capability for N3 data transfer.
0N3 data transfer supported
1N3 data transfer not supported
IP header compression for control plane CIoT 5GS optimization (5G-IPHC-CP CIoT) (octet 4, bit 7)
This bit indicates the capability for IP header compression for control plane CIoT 5GS optimization.
0IP header compression for control plane CIoT 5GS optimization not supported
1IP header compression for control plane CIoT 5GS optimization supported
User plane CIoT 5GS optimization (5G-UP CIoT) (octet 4, bit 8)
This bit indicates the capability for user plane CIoT 5GS optimization.
0User plane CIoT 5GS optimization not supported
1User plane CIoT 5GS optimization supported
Location Services indicator in 5GC (5G-LCS) (octet 5, bit 1)
0Location services via 5GC not supported
1Location services via 5GC supported
ATSSS support indicator (ATS-IND) (octet 5, bit 2)
This bit indicates the network support for ATSSS.
0ATSSS not supported
1ATSSS supported
Ethernet header compression for control plane CIoT 5GS optimization (5G-EHC-CP CIoT) (octet 5, bit 3)
This bit indicates the capability for Ethernet header compression for control plane CIoT 5GS optimization
0Ethernet header compression for control plane CIoT 5GS optimization not supported
1Ethernet header compression for control plane CIoT 5GS optimization supported
N1 NAS signalling connection release (NCR) (octet 5, bit 4)
This bit indicates whether N1 NAS signalling connection release is supported.
0N1-NAS signalling connection release not supported
1N1-NAS signalling connection release supported
Paging indication for voice services (PIV) (octet 5, bit 5)
This bit indicates whether paging indication for voice services is supported.
0paging indication for voice services not supported
1paging indication for voice services supported
Reject paging request (RPR) (octet 5, bit 6)
This bit indicates whether reject paging request is supported.
0reject paging request not supported
1reject paging request supported
Paging restriction (PR) (octet 5, bit 7)
This bit indicates whether paging restriction is supported.
0paging restriction not supported
1paging restriction supported
UN-PER (octet 5, bit 8)
This bit indicates the capability to support Unavailability period
0unavailability period not supported
1unavailability period supported
Non-3GPP access path switching (NAPS) (octet 6, bit 1)
This bit indicates whether non-3GPP access path switching is supported.
0non-3GPP access path switching not supported
1non-3GPP access path switching supported
LCS-UPP user plane positioning (LCS-UPP) (octet 6, bit 2)
This bit indicates the capability to support LCS-UPP user plane positioning (see TS 23.273).
0User plane positioning using LCS-UPP not supported
1User plane positioning using LCS-UPP supported
SUPL user plane positioning (SUPL) (octet 6, bit 3)
This bit indicates the capability to support SUPL user plane positioning (see TS 38.305 and TS 23.271).
0User plane positioning using SUPL not supported
1User plane positioning using SUPL supported
Ranging and sidelink positioning support (RSLP) (octet 6, bit 4)
This bit indicates the capability to support ranging and sidelink positioning.
0Ranging and sidelink positioning not supported
1Ranging and sidelink positioning supported
Bits 5 to 8 of octet 6 are spare and shall be coded as zero.
NOTE 1:
For a registration procedure over non-3GPP access, bit 1 of octet 3 and bits 3 to 7 of octet 3 are ignored.
NOTE 2:
For a registration procedure over 3GPP access, bit 2 of octet 3 and bit 1 of octet 4 are ignored.
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9.11.3.6  5GS registration result  p. 886

The purpose of the 5GS registration result information element is to specify the result of a registration procedure.
The 5GS registration result information element is coded as shown in Figure 9.11.3.6.1 and Table 9.11.3.6.1.
The 5GS registration result is a type 4 information element with a length of 3 octets.
Reproduction of 3GPP TS 24.501, Fig. 9.11.3.6.1: 5GS registration result information element
Figure 9.11.3.6.1: 5GS registration result information element
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5GS registration result value (octet 3, bits 1 to 3) (NOTE)
Bits
3 2 1
0 0 13GPP access
0 1 0Non-3GPP access
0 1 13GPP access and non-3GPP access
1 1 1reserved
All other values are unused and shall be treated as "3GPP access", if received by the UE.
SMS over NAS transport allowed (SMS allowed) (octet 3, bit 4) (NOTE)
0SMS over NAS not allowed
1SMS over NAS allowed
Network slice-specific authentication and authorization is to be performed (NSSAA to be performed) (octet 3, bit 5) (NOTE)
0Network slice-specific authentication and authorization is not to be performed
1Network slice-specific authentication and authorization is to be performed
Emergency registered (octet 3, bit 6) (NOTE)
0Not registered for emergency services
1Registered for emergency services
Disaster roaming registration result value (octet 3, bit 7)
0No additional information
1Request for registration for disaster roaming service accepted as registration not for disaster roaming service
Bit 8 of octet 3 is spare and shall be coded as zero.
NOTE:
All bits other than bit 6 in octet 3 shall be ignored by the UE when the 5GS registration result IE is received in the CONFIGURATION UPDATE COMMAND message.
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9.11.3.7  5GS registration type  p. 887

The purpose of the 5GS registration type information element is to indicate the type of the requested registration.
The 5GS registration type information element is coded as shown in Figure 9.11.3.7.1 and Table 9.11.3.7.1.
The 5GS registration type is a type 1 information element with a length of 1 octet.
Reproduction of 3GPP TS 24.501, Fig. 9.11.3.7.1: 5GS registration type information element
Figure 9.11.3.7.1: 5GS registration type information element
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5GS registration type value (octet 1, bits 1 to 3)
Bits
3 2 1
0 0 1initial registration
0 1 0mobility registration updating
0 1 1periodic registration updating
1 0 0emergency registration
1 0 1SNPN onboarding registration
1 1 0disaster roaming mobility registration updating
1 1 1disaster roaming initial registration
All other values are unused and shall be interpreted as "initial registration", if received by the network.
Follow-on request bit (FOR) (octet 1, bit 4)
0No follow-on request pending
1Follow-on request pending
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