Content for TS 24.501 Word version: 19.0.0

1… 3… 4… 4.4… 4.4.3… 4.5… 4.5.3… 4.6… 4.7… 4.9… 4.15… 5… 5.2… 5.3… 5.3.2… 5.3.7… 5.3.19… 5.4… 5.4.1.3… 5.4.2… 5.4.4… 5.4.5… 5.4.6… 5.5… 5.5.1.2.4 5.5.1.2.5… 5.5.1.3… 5.5.1.3.4 5.5.1.3.5… 5.5.2… 5.6… 5.6.2… 6… 6.1.4… 6.2… 6.3… 6.3.2… 6.3.3… 6.4… 6.4.1.4… 6.4.2… 6.5… 7… 8… 8.2.9… 8.3… 9… 9.11.2… 9.11.2.10… 9.11.3… 9.11.3.4… 9.11.3.8… 9.11.3.14… 9.11.3.18C… 9.11.3.29… 9.11.3.33… 9.11.3.39… 9.11.3.45… 9.11.3.50… 9.11.3.53A… 9.11.3.68… 9.11.3.75… 9.11.4… 9.11.4.10… 9.11.4.13… 9.11.4.16… 9.11.4.30… 9.12 10… A… B… C… D… D.6… D.6.3… D.6.8 D.7…

8.2.9 Registration reject 8.2.10 UL NAS transport 8.2.11 DL NAS transport 8.2.12 De-registration request (UE originating de-registration) 8.2.13 De-registration accept (UE originating de-registration) 8.2.14 De-registration request (UE terminated de-registration) 8.2.15 De-registration accept (UE terminated de-registration) 8.2.16 Service request 8.2.17 Service accept 8.2.18 Service reject 8.2.19 Configuration update command 8.2.20 Configuration update complete 8.2.21 Identity request 8.2.22 Identity response 8.2.23 Notification 8.2.24 Notification response 8.2.25 Security mode command 8.2.26 Security mode complete 8.2.27 Security mode reject 8.2.28 Security protected 5GS NAS message 8.2.29 5GMM status 8.2.30 Control Plane Service request 8.2.31 Network slice-specific authentication command 8.2.32 Network slice-specific authentication complete 8.2.33 Network slice-specific authentication result 8.2.34 Relay key request 8.2.35 Relay key accept 8.2.36 Relay key reject 8.2.37 Relay authentication request 8.2.38 Relay authentication response
...

8.2.9 Registration reject p. 783

8.2.9.1 Message definition p. 783

The REGISTRATION REJECT message is sent by the AMF to the UE. See Table 8.2.9.1.1.

Message type:

REGISTRATION REJECT

Significance:

dual

Direction:

network to UE

Table 8.2.9.1.1: REGISTRATION REJECT message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Extended protocol discriminator	Extended protocol discriminator 9.2	M	V	1
	Security header type	Security header type 9.3	M	V	1/2
	Spare half octet	Spare half octet 9.5	M	V	1/2
	Registration reject message identity	Message type 9.7	M	V	1
	5GMM cause	5GMM cause 9.11.3.2	M	V	1
5F	T3346 value	GPRS timer 2 9.11.2.4	O	TLV	3
16	T3502 value	GPRS timer 2 9.11.2.4	O	TLV	3
78	EAP message	EAP message 9.11.2.2	O	TLV-E	7-1503
69	Rejected NSSAI	Rejected NSSAI 9.11.3.46	O	TLV	4-42
75	CAG information list	CAG information list 9.11.3.18A	O	TLV-E	3-n
68	Extended rejected NSSAI	Extended rejected NSSAI 9.11.3.75	O	TLV	5-90
2C	Disaster return wait range	Registration wait range 9.11.3.84	O	TLV	4
71	Extended CAG information list	Extended CAG information list 9.11.3.86	O	TLV-E	3-n
3A	Lower bound timer value	GPRS timer 3 9.11.2.5	O	TLV	3
1D	Forbidden TAI(s) for the list of "5GS forbidden tracking areas for roaming"	5GS tracking area identity list 9.11.3.9	O	TLV	9-114
1E	Forbidden TAI(s) for the list of "5GS forbidden tracking areas for regional provision of service"	5GS tracking area identity list 9.11.3.9	O	TLV	9-114
3E	N3IWF identifier	N3IWF identifier 9.11.3.93	O	TLV	7-n
4D	TNAN information	TNAN information 9.11.3.94	O	TLV	3-n
62	Extended 5GMM cause	Extended 5GMM cause 9.11.3.109	O	TLV	3

8.2.9.2 T3346 value p. 784

The AMF may include this IE when the general NAS level mobility management congestion control is active

8.2.9.3 T3502 value p. 784

This IE may be included to indicate a value for timer T3502 during the initial registration.

8.2.9.4 EAP message p. 784

EAP message IE is included if the REGISTRATION REJECT message is used to convey EAP-failure message.

8.2.9.5 Rejected NSSAI |R16| p. 785

The network may include this IE to inform the UE of one or more S-NSSAIs that were included in the requested NSSAI in the REGISTRATION REQUEST message but were rejected by the network.

8.2.9.6 CAG information list |R16| p. 785

This IE may be included to assign a new "CAG information list" to the UE or delete the "CAG information list" at the UE side.

8.2.9.7 Extended rejected NSSAI |R17| p. 785

If the UE supports Extended rejected NSSAI, the network may include this IE to inform the UE of one or more S-NSSAIs that were included in the requested NSSAI in the REGISTRATION REQUEST message but were rejected by the network.

8.2.9.8 Disaster return wait range |R17| p. 785

This IE may be included to assign a new disaster return wait range to the UE.

8.2.9.9 Extended CAG information list |R17| p. 785

If the UE supports Extended CAG information list, the network may include this IE to assign a new "CAG information list" to the UE or delete the "CAG information list" at the UE side.

8.2.9.10 Lower bound timer value |R17| p. 785

The AMF may include this IE when the 5GMM cause is set to #78 "PLMN not allowed to operate at the present UE location", to provide a minimum time value for an entry added to the list of "PLMNs not allowed to operate at the present UE location".

8.2.9.11 Forbidden TAI(s) for the list of "5GS forbidden tracking areas for roaming" |R17| p. 785

This IE is included to indicate the forbidden TAI(s) to be stored in the list of "5GS forbidden tracking areas for roaming". This IE is included only if the message is sent via satellite NG-RAN access.

8.2.9.12 Forbidden TAI(s) for the list of "5GS forbidden tracking areas for regional provision of service" |R17| p. 785

This IE is included to indicate the forbidden TAI(s) to be stored in the list of "5GS forbidden tracking areas for regional provision of service". This IE is included only if the message is sent via satellite NG-RAN access.

8.2.9.13 N3IWF identifier |R18| p. 785

The network may include this IE if the UE supports slice-based N3IWF selection over non-3GPP access network.

8.2.9.14 TNAN information |R18| p. 785

The network may include this IE if the UE supports slice-based TNGF selection over trusted non-3GPP access network.

8.2.9.15 Extended 5GMM cause |R18| p. 785

This IE may be included by the network to indicate additional information associated with the 5GMM cause value #15 "no suitable cells in tracking area".

8.2.10 UL NAS transport p. 786

8.2.10.1 Message definition p. 786

The UL NAS TRANSPORT message transports message payload and associated information to the AMF. See Table 8.2.10.1.1.

Message type:

UL NAS TRANSPORT

Significance:

dual

Direction:

UE to network

Table 8.2.10.1.1: UL NAS TRANSPORT message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Extended protocol discriminator	Extended protocol discriminator 9.2	M	V	1
	Security header type	Security header type 9.3	M	V	1/2
	Spare half octet	Spare half octet 9.5	M	V	1/2
	UL NAS TRANSPORT message identity	Message type 9.7	M	V	1
	Payload container type	Payload container type 9.11.3.40	M	V	1/2
	Spare half octet	Spare half octet 9.5	M	V	1/2
	Payload container	Payload container 9.11.3.39	M	LV-E	3-65537
12	PDU session ID	PDU session identity 2 9.11.3.41	C	TV	2
59	Old PDU session ID	PDU session identity 2 9.11.3.41	O	TV	2
8-	Request type	Request type 9.11.3.47	O	TV	1
22	S-NSSAI	S-NSSAI 9.11.2.8	O	TLV	3-10
25	DNN	DNN 9.11.2.1B	O	TLV	3-102
24	Additional information	Additional information 9.11.2.1	O	TLV	3-n
A-	MA PDU session information	MA PDU session information 9.11.3.31A	O	TV	1
F-	Release assistance indication	Release assistance indication 9.11.3.46A	O	TV	1
4E	Non-3GPP access path switching indication	Non-3GPP access path switching indication 9.11.3.99	O	TLV	3
5A	Alternative S-NSSAI	S-NSSAI 9.11.2.8	O	TLV	3-10
9-	Payload container information	Payload container information 9.11.3.106	O	TV	1

8.2.10.2 PDU session ID p. 786

The UE shall include this IE when the Payload container type IE is set to "N1 SM information" or "CIoT user data".

8.2.10.3 Old PDU session ID p. 787

The UE shall include this IE if the UL NAS TRANSPORT message transports a PDU SESSION ESTABLISHMENT REQUEST message upon receiving the PDU SESSION MODIFICATION COMMAND message with the 5GSM cause IE set to #39 "reactivation requested" and the Payload container type IE is set to "N1 SM information".

8.2.10.4 Request type p. 787

The UE shall include this IE when the PDU session ID IE is included and the Payload container IE contains the PDU SESSION ESTABLISHMENT REQUEST message or the PDU SESSION MODIFICATION REQUEST which is not initiated to indicate a change of 3GPP PS data off UE status associated to a PDU session.

8.2.10.5 S-NSSAI p. 787

The UE may include this IE when the Request type IE is set to "initial request", "existing PDU session" or "MA PDU request", the Payload container type IE is set to "N1 SM information" and the UE is not registered for onboarding services in SNPN.

8.2.10.6 DNN p. 787

8.2.10.7 Additional information p. 787

This IE is included when the Payload container type IE is set to "LTE Positioning Protocol (LPP) message container", "UPP-CMI container", "SLPP message container", or "Location services (LCS) message container".

8.2.10.8 MA PDU session information |R16| p. 787

The UE may include this IE if the Request type IE is included and is not set to "initial emergency request" or "existing emergency PDU session" in the UL NAS TRANSPORT message.

8.2.10.9 Release assistance indication |R16| p. 787

The UE may include this IE to inform the network whether:

no further uplink and no further downlink data transmission is expected; or
only a single downlink data transmission (e.g. acknowledgement or response to uplink data) and no further uplink data transmission subsequent to the uplink data transmission is expected.

8.2.10.10 Non-3GPP access path switching indication |R18| p. 787

The UE may include this IE when the Payload container type IE is set to "N1 SM information" to indicate whether the UE supports the non-3GPP access path switching for the PDU session.

8.2.10.11 Alternative S-NSSAI |R18| p. 787

The UE shall include this IE if the UE can provide alternative S-NSSAI associated with the S-NSSAI to be replaced to the network.

8.2.10.12 Payload container information |R18| p. 787

The UE may include this IE when the Payload container type IE is set to "Location services (LCS) message container".

8.2.11 DL NAS transport p. 788

8.2.11.1 Message definition p. 788

The DL NAS TRANSPORT message transports message payload and associated information to the UE. See Table 8.2.11.1.1.

Message type:

DL NAS TRANSPORT

Significance:

dual

Direction:

network to UE

Table 8.2.11.1.1: DL NAS TRANSPORT message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Extended protocol discriminator	Extended protocol discriminator 9.2	M	V	1
	Security header type	Security header type 9.3	M	V	1/2
	Spare half octet	Spare half octet 9.5	M	V	1/2
	DL NAS TRANSPORT message identity	Message type 9.7	M	V	1
	Payload container type	Payload container type 9.11.3.40	M	V	1/2
	Spare half octet	Spare half octet 9.5	M	V	1/2
	Payload container	Payload container 9.11.3.39	M	LV-E	3-65537
12	PDU session ID	PDU session identity 2 9.11.3.41	C	TV	2
24	Additional information	Additional information 9.11.2.1	O	TLV	3-n
58	5GMM cause	5GMM cause 9.11.3.2	O	TV	2
37	Back-off timer value	GPRS timer 3 9.11.2.5	O	TLV	3
3A	Lower bound timer value	GPRS timer 3 9.11.2.5	O	TLV	3

8.2.11.2 PDU session ID p. 788

The AMF shall include this IE when the Payload container type IE is set to "N1 SM information" or "CIoT user data container".

8.2.11.3 Additional information p. 788

8.2.11.4 5GMM cause p. 788

The AMF shall include this IE when the Payload container IE contains an uplink payload which was not forwarded and the Payload container type IE is not set to "Multiple payloads".

8.2.11.5 Back-off timer value p. 788

The AMF may include this IE to indicate the back-off timer value when the Payload container IE is included and the Payload container type IE is not set to "Multiple payloads".

8.2.11.6 Lower bound timer value |R17| p. 789

8.2.12 De-registration request (UE originating de-registration) p. 789

8.2.12.1 Message definition p. 789

The DEREGISTRATION REQUEST message is sent by the UE to the AMF. See Table 8.2.12.1.1.

Message type:

DEREGISTRATION REQUEST

Significance:

dual

Direction:

UE to network

Table 8.2.12.1.1: DEREGISTRATION REQUEST message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Extended protocol discriminator	Extended protocol discriminator 9.2	M	V	1
	Security header type	Security header type 9.3	M	V	1/2
	Spare half octet	Spare half octet 9.5	M	V	1/2
	De-registration request message identity	Message type 9.7	M	V	1
	De-registration type	De-registration type 9.11.3.20	M	V	1/2
	ngKSI	NAS key set identifier 9.11.3.32	M	V	1/2
	5GS mobile identity	5GS mobile identity 9.11.3.4	M	LV-E	6-n
3C	Unavailability information	Unavailability information 9.11.2.20	O	TLV	3-9
71	NAS message container	NAS message container 9.11.3.33	O	TLV-E	4-n

8.2.12.2 Unavailability information |R18| p. 789

The UE may include this IE when an event is triggered in the UE that would make the UE unavailable for a certain period and the use of unavailability period is not due to NR satellite access discontinuous coverage.

8.2.12.3 NAS message container |R18| p. 789

This IE shall be included if the UE is sending a DEREGISTRATION REQUEST message as an initial NAS message and the UE needs to send non-cleartext IEs.

8.2.13 De-registration accept (UE originating de-registration) p. 789

8.2.13.1 Message definition p. 789

The DEREGISTRATION ACCEPT message is sent by the AMF to the UE. See Table 8.2.13.1.1.

Message type:

DEREGISTRATION ACCEPT

Significance:

dual

Direction:

network to UE

Table 8.2.13.1.1: DEREGISTRATION ACCEPT message content

Information Element	Type/Reference	Presence	Format	Length
Extended protocol discriminator	Extended protocol discriminator 9.2	M	V	1
Security header type	Security header type 9.3	M	V	1/2
Spare half octet	Spare half octet 9.5	M	V	1/2
De-registration accept message identity	Message type 9.7	M	V	1

8.2.14 De-registration request (UE terminated de-registration) p. 790

8.2.14.1 Message definition p. 790

The DEREGISTRATION REQUEST message is sent by the AMF to the UE. See Table 8.2.14.1.1.

Message type:

DEREGISTRATION REQUEST

Significance:

dual

Direction:

network to UE

Table 8.2.14.1.1: DEREGISTRATION REQUEST message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Extended protocol discriminator	Extended protocol discriminator 9.2	M	V	1
	Security header type	Security header type 9.3	M	V	1/2
	Spare half octet	Spare half octet 9.5	M	V	1/2
	De-registration request message identity	Message type 9.7	M	V	1
	De-registration type	De-registration type 9.11.3.20	M	V	1/2
	Spare half octet	Spare half octet 9.5	M	V	1/2
58	5GMM cause	5GMM cause 9.11.3.2	O	TV	2
5F	T3346 value	GPRS timer 2 9.11.2.4	O	TLV	3
6D	Rejected NSSAI	Rejected NSSAI 9.11.3.46	O	TLV	4-42
75	CAG information list	CAG information list 9.11.3.18A	O	TLV-E	3-n
68	Extended rejected NSSAI	Extended rejected NSSAI 9.11.3.75	O	TLV	5-90
2C	Disaster return wait range	Registration wait range 9.11.3.84	O	TLV	4
71	Extended CAG information list	Extended CAG information list 9.11.3.86	O	TLV-E	3-n
3A	Lower bound timer value	GPRS timer 3 9.11.2.5	O	TLV	3
1D	Forbidden TAI(s) for the list of "5GS forbidden tracking areas for roaming"	5GS tracking area identity list 9.11.3.9	O	TLV	9-114
1E	Forbidden TAI(s) for the list of "5GS forbidden tracking areas for regional provision of service"	5GS tracking area identity list 9.11.3.9	O	TLV	9-114

8.2.14.2 5GMM cause p. 791

This information element is included if a 5GMM cause is provided.

8.2.14.3 T3346 value p. 791

The AMF may include this IE when the general NAS level mobility management congestion control is active.

8.2.14.4 Rejected NSSAI |R16| p. 791

The AMF may include this IE to inform the UE of one or more S-NSSAIs that were rejected by the network.

8.2.14.5 CAG information list |R16| p. 791

This IE may be included to assign a new "CAG information list" to the UE or delete the "CAG information list" at the UE side.

8.2.14.6 Extended rejected NSSAI |R17| p. 792

If the UE supports Extended rejected NSSAI, the AMF may include this IE to inform the UE of one or more S-NSSAIs that were rejected by the network.

8.2.14.7 Disaster return wait range |R17| p. 792

This IE may be included to assign a new disaster return wait range to the UE.

8.2.14.7A Extended CAG information list |R17| p. 792

If the UE supports Extended CAG information list, the network may include this IE to assign a new "CAG information list" to the UE or delete the "CAG information list" at the UE side.

8.2.14.8 Lower bound timer value |R17| p. 792

8.2.14.9 Forbidden TAI(s) for the list of "5GS forbidden tracking areas for roaming" |R17| p. 792

8.2.14.10 Forbidden TAI(s) for the list of "5GS forbidden tracking areas for regional provision of service" |R17| p. 792

8.2.15 De-registration accept (UE terminated de-registration) p. 792

8.2.15.1 Message definition p. 792

The DEREGISTRATION ACCEPT message is sent by the UE to the AMF. See Table 8.2.15.1.1.

Message type:

DEREGISTRATION ACCEPT

Significance:

dual

Direction:

UE to network

Table 8.2.15.1.1: DEREGISTRATION ACCEPT message content

Information Element	Type/Reference	Presence	Format	Length
Extended protocol discriminator	Extended protocol discriminator 9.2	M	V	1
Security header type	Security header type 9.3	M	V	1/2
Spare half octet	Spare half octet 9.5	M	V	1/2
De-registration accept message identity	Message type 9.7	M	V	1

8.2.16 Service request p. 793

8.2.16.1 Message definition p. 793

The SERVICE REQUEST message is sent by the UE to the AMF in order to request the establishment of an N1 NAS signalling connection, to request the establishment of user-plane resources for PDU sessions which are established without user-plane resources, or both. See Table 8.2.16.1.1.

Message type:

SERVICE REQUEST

Significance:

dual

Direction:

UE to network

Table 8.2.16.1.1: SERVICE REQUEST message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Extended protocol discriminator	Extended protocol discriminator 9.2	M	V	1
	Security header type	Security header type 9.3	M	V	1/2
	Spare half octet	Spare half octet 9.5	M	V	1/2
	Service request message identity	Message type 9.7	M	V	1
	ngKSI	NAS key set identifier 9.11.3.32	M	V	1/2
	Service type	Service type 9.11.3.50	M	V	1/2
	5G-S-TMSI	5GS mobile identity 9.11.3.4	M	LV-E	9
40	Uplink data status	Uplink data status 9.11.3.57	O	TLV	4-34
50	PDU session status	PDU session status 9.11.3.44	O	TLV	4-34
25	Allowed PDU session status	Allowed PDU session status 9.11.3.13	O	TLV	4-34
71	NAS message container	NAS message container 9.11.3.33	O	TLV-E	4-n
29	UE request type	UE request type 9.11.3.76	O	TLV	3
28	Paging restriction	Paging restriction 9.11.3.77	O	TLV	3-35

8.2.16.2 Uplink data status p. 793

This IE shall be included if the UE has uplink user data pending to be sent.

8.2.16.3 PDU session status p. 793

This IE shall be included when the UE needs to indicate the PDU sessions that are associated with the access type that the message is sent over, that are active within the UE.

8.2.16.4 Allowed PDU session status p. 793

This IE shall be included if the SERVICE REQUEST message is sent as a response to paging with the access type indicating non-3GPP access or notification via 3GPP access for PDU session(s) associated with non-3GPP access.

8.2.16.5 NAS message container p. 794

This IE shall be included if the UE is sending a SERVICE REQUEST message as an initial NAS message and the UE needs to send non-cleartext IEs.

8.2.16.6 UE request type |R17| p. 794

The UE shall include this IE if the MUSIM UE requests the release of the NAS signalling connection or rejects the paging request from the network.

8.2.16.7 Paging restriction |R17| p. 794

The UE shall include this IE if the Request type is set to "NAS signalling connection release" or to "Rejection of paging" in the UE request type IE and the UE requests the network to restrict paging.

8.2.17 Service accept p. 794

8.2.17.1 Message definition p. 794

The SERVICE ACCEPT message is sent by the AMF to the UE in order to accept the service request procedure. See Table 8.2.17.1.1.

Message type:

SERVICE ACCEPT

Significance:

dual

Direction:

network to UE

Table 8.2.17.1.1: SERVICE ACCEPT message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Extended protocol discriminator	Extended protocol discriminator 9.2	M	V	1
	Security header type	Security header type 9.3	M	V	1/2
	Spare half octet	Spare half octet 9.5	M	V	1/2
	Service accept message identity	Message type 9.7	M	V	1
50	PDU session status	PDU session status 9.11.3.44	O	TLV	4-34
26	PDU session reactivation result	PDU session reactivation result 9.11.3.42	O	TLV	4-34
72	PDU session reactivation result error cause	PDU session reactivation result error cause 9.11.3.43	O	TLV-E	5-515
78	EAP message	EAP message 9.11.2.2	O	TLV-E	7-1503
6B	T3448 value	GPRS timer 2 9.11.2.4	O	TLV	3
34	5GS additional request result	5GS additional request result 9.11.3.81	O	TLV	3
1D	Forbidden TAI(s) for the list of "5GS forbidden tracking areas for roaming"	5GS tracking area identity list 9.11.3.9	O	TLV	9-114
1E	Forbidden TAI(s) for the list of "5GS forbidden tracking areas for regional provision of service"	5GS tracking area identity list 9.11.3.9	O	TLV	9-114

8.2.17.2 PDU session status p. 795

This IE shall be included when the network needs to indicate the PDU sessions that are associated with the access type that the message is sent over that are active within the network.

8.2.17.3 PDU session reactivation result p. 795

This IE shall be included:

if the Uplink data status IE is included in the SERVICE REQUEST message; or
if the Allowed PDU session status IE is included in the SERVICE REQUEST message and there is at least one PDU session indicated in the Allowed PDU session status IE for which user-plane resources can be re-established over 3GPP access.

8.2.17.4 PDU session reactivation result error cause p. 795

This IE may be included if the PDU session reactivation result IE is included and there exist one or more PDU sessions for which the user-plane resources cannot be re-established, to indicate the cause of failure to re-establish the user-plane resources.

8.2.17.5 EAP message p. 795

EAP message IE is included if the SERVICE ACCEPT message is sent to a UE registered for emergency services and is used to convey EAP-failure message.

8.2.17.6 T3448 value |R16| p. 795

The network may include this IE if the congestion control for transport of user data via the control plane is active and the UE supports the control plane CIoT 5GS optimizations.

8.2.17.7 5GS additional request result |R17| p. 795

The network may include this IE to inform the UE about the result of additional request.

8.2.17.8 Forbidden TAI(s) for the list of "5GS forbidden tracking areas for roaming" |R17| p. 795

8.2.17.9 Forbidden TAI(s) for the list of "5GS forbidden tracking areas for regional provision of service" |R17| p. 795

8.2.18 Service reject p. 795

8.2.18.1 Message definition p. 795

The SERVICE REJECT message is sent by the AMF to the UE in order to reject the service request procedure. See Table 8.2.18.1.1.

Message type:

SERVICE REJECT

Significance:

dual

Direction:

network to UE

Table 8.2.18.1.1: SERVICE REJECT message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Extended protocol discriminator	Extended protocol discriminator 9.2	M	V	1
	Security header type	Security header type 9.3	M	V	1/2
	Spare half octet	Spare half octet 9.5	M	V	1/2
	Service reject message identity	Message type 9.7	M	V	1
	5GMM cause	5GMM cause 9.11.3.2	M	V	1
50	PDU session status	PDU session status 9.11.3.44	O	TLV	4-34
5F	T3346 value	GPRS timer 2 9.11.2.4	O	TLV	3
78	EAP message	EAP message 9.11.2.2	O	TLV-E	7-1503
6B	T3448 value	GPRS timer 2 9.11.2.4	O	TLV	3
75	CAG information list	CAG information list 9.11.3.18A	O	TLV-E	3-n
2C	Disaster return wait range	Registration wait range 9.11.3.84	O	TLV	4
71	Extended CAG information list	Extended CAG information list 9.11.3.86	O	TLV-E	3-n
3A	Lower bound timer value	GPRS timer 3 9.11.2.5	O	TLV	3
1D	Forbidden TAI(s) for the list of "5GS forbidden tracking areas for roaming"	5GS tracking area identity list 9.11.3.9	O	TLV	9-114
1E	Forbidden TAI(s) for the list of "5GS forbidden tracking areas for regional provision of service"	5GS tracking area identity list 9.11.3.9	O	TLV	9-114

8.2.18.2 PDU session status p. 796

This IE shall be included when the network needs to indicate the PDU sessions that are associated with the access type that the message is sent over, that are active within the network.

8.2.18.3 T3346 value p. 796

The AMF may include this IE when the general NAS level mobility management congestion control is active.

8.2.18.4 EAP message p. 796

EAP message IE is included if the SERVICE REJECT message is used to convey EAP-failure message.

8.2.18.5 T3448 value |R16| p. 796

The network may include this IE if the congestion control for transport of user data via the control plane is active and the UE supports the control plane CIoT 5GS optimizations.

8.2.18.6 CAG information list |R16| p. 797

This IE may be included to assign a new "CAG information list" to the UE or delete the "CAG information list" at the UE side.

8.2.18.7 Disaster return wait range |R17| p. 797

This IE may be included to assign a new disaster return wait range to the UE.

8.2.18.8 Extended CAG information list |R17| p. 797

If the UE supports Extended CAG information list, the network may include this IE to assign a new "CAG information list" to the UE or delete the "CAG information list" at the UE side.

8.2.18.9 Lower bound timer value |R17| p. 797

8.2.18.10 Forbidden TAI(s) for the list of "5GS forbidden tracking areas for roaming" |R17| p. 797

8.2.18.11 Forbidden TAI(s) for the list of "5GS forbidden tracking areas for regional provision of service" |R17| p. 797

8.2.19 Configuration update command p. 797

8.2.19.1 Message definition p. 797

The CONFIGURATION UPDATE COMMAND message is sent by the AMF to the UE. See Table 8.2.19.1.1.

Message type:

CONFIGURATION UPDATE COMMAND

Significance:

dual

Direction:

network to UE

Table 8.2.19.1.1: CONFIGURATION UPDATE COMMAND message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Extended protocol discriminator	Extended protocol discriminator 9.2	M	V	1
	Security header type	Security header type 9.3	M	V	1/2
	Spare half octet	Spare half octet 9.5	M	V	1/2
	Configuration update command message identity	Message type 9.7	M	V	1
D-	Configuration update indication	Configuration update indication 9.11.3.18	O	TV	1
77	5G-GUTI	5GS mobile identity 9.11.3.4	O	TLV-E	14
54	TAI list	5GS tracking area identity list 9.11.3.9	O	TLV	9-114
15	Allowed NSSAI	NSSAI 9.11.3.37	O	TLV	4-74
27	Service area list	Service area list 9.11.3.49	O	TLV	6-114
43	Full name for network	Network name 9.11.3.35	O	TLV	3-n
45	Short name for network	Network name 9.11.3.35	O	TLV	3-n
46	Local time zone	Time zone 9.11.3.52	O	TV	2
47	Universal time and local time zone	Time zone and time 9.11.3.53	O	TV	8
49	Network daylight saving time	Daylight saving time 9.11.3.19	O	TLV	3
79	LADN information	LADN information 9.11.3.30	O	TLV-E	3-1715
B-	MICO indication	MICO indication 9.11.3.31	O	TV	1
9-	Network slicing indication	Network slicing indication 9.11.3.36	O	TV	1
31	Configured NSSAI	NSSAI 9.11.3.37	O	TLV	4-146
11	Rejected NSSAI	Rejected NSSAI 9.11.3.46	O	TLV	4-42
76	Operator-defined access category definitions	Operator-defined access category definitions 9.11.3.38	O	TLV-E	3-8323
F-	SMS indication	SMS indication 9.11.3.50A	O	TV	1
6C	T3447 value	GPRS timer 3 9.11.2.5	O	TLV	3
75	CAG information list	CAG information list 9.11.3.18A	O	TLV-E	3-n
67	UE radio capability ID	UE radio capability ID 9.11.3.68	O	TLV	3-n
A-	UE radio capability ID deletion indication	UE radio capability ID deletion indication 9.11.3.69	O	TV	1
44	5GS registration result	5GS registration result 9.11.3.6	O	TLV	3
1B	Truncated 5G-S-TMSI configuration	Truncated 5G-S-TMSI configuration 9.11.3.70	O	TLV	3
C-	Additional configuration indication	Additional configuration indication 9.11.3.74	O	TV	1
68	Extended rejected NSSAI	Extended rejected NSSAI 9.11.3.75	O	TLV	5-90
72	Service-level-AA container	Service-level-AA container 9.11.2.10	O	TLV-E	4-65538
70	NSSRG information	NSSRG information 9.11.3.82	O	TLV-E	7-4099
14	Disaster roaming wait range	Registration wait range 9.11.3.84	O	TLV	4
2C	Disaster return wait range	Registration wait range 9.11.3.84	O	TLV	4
13	List of PLMNs to be used in disaster condition	List of PLMNs to be used in disaster condition 9.11.3.83	O	TLV	2-n
71	Extended CAG information list	Extended CAG information list 9.11.3.86	O	TLV-E	3-n
1F	Updated PEIPS assistance information	PEIPS assistance information 9.11.3.80	O	TLV	3-n
73	NSAG information	NSAG information 9.11.3.87	O	TLV-E	9-3143
E-	Priority indicator	Priority indicator 9.11.3.91	O	TV	1
4B	RAN timing synchronization	RAN timing synchronization 9.11.3.95	O	TLV	3
78	Extended LADN information	Extended LADN information 9.11.3.96	O	TLV-E	3-1787
4C	Alternative NSSAI	Alternative NSSAI 9.11.3.97	O	TLV	2-146
7B	S-NSSAI location validity information	S-NSSAI location validity information 9.11.3.100	O	TLV-E	17-38611
5B	S-NSSAI time validity information	S-NSSAI time validity information 9.11.3.101	O	TLV-E	23-257
4F	Maximum time offset	GPRS timer 3 9.11.2.5	O	TLV	3
74	Partially allowed NSSAI	Partial NSSAI 9.11.3.103	O	TLV-E	3-808
7A	Partially rejected NSSAI	Partial NSSAI 9.11.3.103	O	TLV-E	3-808
61	On-demand NSSAI	On-demand NSSAI 9.11.3.108	O	TLV	5-210
63	RAT utilization control	RAT utilization control 9.11.3.110	O	TLV	4-n

8.2.19.2 Configuration update indication p. 800

The AMF shall include this IE if the AMF needs to request an acknowledgement or a registration procedure from the UE.

8.2.19.3 5G-GUTI p. 800

This IE may be included to assign a new 5G-GUTI to the UE.

8.2.19.4 TAI list p. 800

This IE may be included to assign a new TAI list to the UE.

8.2.19.5 Allowed NSSAI p. 800

This IE may be included to assign a new allowed NSSAI to the UE not registered for onboarding services in SNPN.

8.2.19.6 Service area list p. 800

This IE may be included to assign a new service area list to the UE.

8.2.19.7 Full name for network p. 801

This IE may be included to assign a new full name for network to the UE.

8.2.19.8 Short name for network p. 801

This IE may be included to assign a new short name for network to the UE.

8.2.19.9 Local time zone p. 801

This IE may be included to assign a new local time zone to the UE.

8.2.19.10 Universal time and local time zone p. 801

This IE may be included to assign new universal time and local time zone to the UE.

8.2.19.11 Network daylight saving time p. 801

This IE may be included to assign new network daylight saving time to the UE.

8.2.19.12 LADN information p. 801

This IE may be included to assign new LADN information to the UE or delete the LADN information at the UE side.

8.2.19.13 MICO indication p. 801

This IE may be included to request the UE to re-negotiate MICO mode.

8.2.19.14 Network slicing indication p. 801

This IE shall be included if the user's network slicing subscription has changed in the UDM of a PLMN or an SNPN.

8.2.19.15 Configured NSSAI p. 801

The AMF shall include this IE when the AMF needs to provide the UE with a new configured NSSAI for the current PLMN or SNPN and the UE is neither registering nor registered for onboarding services in SNPN.

8.2.19.16 Rejected NSSAI p. 801

The network may include this IE to inform the UE of one or more S-NSSAIs that were previously sent to the UE in the allowed NSSAI or the pending NSSAI, but are now considered rejected by the network.

8.2.19.17 Operator-defined access category definitions p. 801

This IE may be included to assign new operator-defined access category definitions to the UE or delete the operator-defined access category definitions at the UE side.

8.2.19.18 SMS indication p. 801

This IE may be included to indicate that the ability for the UE to use SMS over NAS has changed.

8.2.19.19 T3447 value |R16| p. 801

This IE may be included to assign a new T3447 value to the UE.

8.2.19.20 CAG information list |R16| p. 802

This IE may be included to assign new "CAG information list" to the UE or delete the "CAG information list" at the UE side.

8.2.19.21 UE radio capability ID |R16| p. 802

This IE may be included if the UE is not in NB-N1 mode, both the UE and the network support RACS and the network needs to assign a network-assigned UE radio capability ID to the UE.

8.2.19.22 UE radio capability ID deletion indication |R16| p. 802

This IE may be included if the UE is not in NB-N1 mode, both the UE and the network support RACS and the network needs to trigger the UE to delete all network-assigned UE radio capability IDs stored at the UE for the serving PLMN or serving SNPN.

8.2.19.23 5GS registration result |R16| p. 802

This IE shall be included if the network wants to indicate to the UE that the UE is registered for emergency services.

8.2.19.24 Truncated 5G-S-TMSI configuration |R16| p. 802

This IE may be included to provide a new truncated 5G-S-TMSI configuration to the UE in NB-N1 mode if the network is configured to provide the truncated 5G-S-TMSI configuration for control plane CIoT 5GS optimizations.

8.2.19.25 Additional configuration indication |R16| p. 802

The network may include this IE when requesting the UE to register without the release of the N1 NAS signalling connection.

8.2.19.26 Extended rejected NSSAI |R17| p. 802

If the UE supports Extended rejected NSSAI, the network may include this IE to inform the UE of one or more S-NSSAIs that were previously sent to the UE in the allowed NSSAI or the pending NSSAI, but are now considered rejected by the network.

8.2.19.27 Service-level-AA container |R17| p. 802

The network shall include this IE when the AMF receives the Service-level-AA payload or the UUAA-MM result from the UAS-NF during the UUAA-MM procedure or the UUAA revocation procedure. The network shall also include this IE if the AMF receives from the UAS-NF, the CAA-Level UAV ID as part of the UUAA-MM procedure.

8.2.19.28 NSSRG information |R17| p. 802

This IE may be included to provide NSSRG information associated with the configured NSSAI.

8.2.19.29 Disaster roaming wait range |R17| p. 802

This IE may be included to assign a new disaster roaming wait range to the UE.

8.2.19.30 Disaster return wait range |R17| p. 802

This IE may be included to assign a new disaster return wait range to the UE.

8.2.19.31 List of PLMNs to be used in disaster condition |R17| p. 803

This IE may be included by an allowed PLMN to assign a new "list of PLMN(s) to be used in disaster condition" associated with the serving PLMN to the UE.

8.2.19.32 Extended CAG information list |R17| p. 803

If the UE supports Extended CAG information list, the network may include this IE to assign a new "CAG information list" to the UE or delete the "CAG information list" at the UE side.

8.2.19.33 Updated PEIPS assistance information |R17| p. 803

The AMF may include this IE if the UE supports NR paging subgrouping, the AMF supports and accepts the use of PEIPIS assistance information for the UE, the UE is not registered for emergency services, the UE does not have an active emergency PDU session, and the network needs to update PEIPS assistance information for the UE.

8.2.19.34 NSAG information |R17| p. 803

If the UE has set the NSAG bit to "NSAG supported" in the 5GMM capability IE of the REGISTRATION REQUEST message and the CONFIGURATION UPDATE COMMAND message is sent over 3GPP access, the network may include this IE to provide NSAG information to the UE.

8.2.19.35 Priority indicator |R17| p. 803

The network shall include this IE when it needs to inform the UE that the use of access identity 1 is valid or is no longer valid.

8.2.19.36 RAN timing synchronization |R18| p. 803

This IE may be included to provide information related to the RAN timing synchronization to a UE which has set the Reconnection to the network due to RAN timing synchronization status change (RANtiming) bit to "Reconnection to the network due to RAN timing synchronization status change supported" in the 5GMM capability IE of the REGISTRATION REQUEST message.

8.2.19.37 Extended LADN information |R18| p. 803

This IE may be included to assign new extended LADN information to the UE or delete the extended LADN information at the UE side.

8.2.19.38 Alternative NSSAI |R18| p. 803

The network may include this IE to provide the mapping information between the S-NSSAI to be replaced and the alternative S-NSSAI to the UE.

8.2.19.39 S-NSSAI location validity information |R18| p. 803

The network may include this IE to update the S-NSSAI location validity information.

8.2.19.40 S-NSSAI time validity information |R18| p. 803

The network may include this IE to update the S-NSSAI time validity information.

8.2.19.41 Maximum time offset |R18| p. 803

This IE may be included to provide the UE with a maximum time offset.

8.2.19.42 Partially allowed NSSAI |R18| p. 804

The network may include this IE to assign a partially allowed NSSAI to the UE.

8.2.19.43 Partially rejected NSSAI |R18| p. 804

The network may include this IE to assign a partially rejected NSSAI to the UE.

8.2.19.44 Feature authorization indication |R18| p. 804

The network may include this IE to inform to the UE about the authorization status of the UE whether to operate as an MBSR or to operate not as an MBSR but to operate as a UE.

8.2.19.45 On-demand NSSAI |R18| p. 804

The network may include this IE to provide the on-demand NSSAI to the UE.

8.2.19.46 RAT utilization control |R19| p. 804

This IE is included to indicate the restricted RAT(s).

8.2.20 Configuration update complete p. 804

8.2.20.1 Message definition p. 804

The CONFIGURATION UPDATE COMPLETE message is sent by the UE to the AMF. See Table 8.2.20.1.1.

Message type:

CONFIGURATION UPDATE COMPLETE

Significance:

dual

Direction:

UE to network

Table 8.2.20.1.1: CONFIGURATION UPDATE COMPLETE message content

Information Element	Type/Reference	Presence	Format	Length
Extended protocol discriminator	Extended protocol discriminator 9.2	M	V	1
Security header type	Security header type 9.3	M	V	1/2
Spare half octet	Spare half octet 9.5	M	V	1/2
Configuration update complete message identity	Message type 9.7	M	V	1

IEI	Information Element	Type/Reference	Presence	Format	Length
	Extended protocol discriminator	Extended protocol discriminator 9.2	M	V	1
	Security header type	Security header type 9.3	M	V	1/2
	Spare half octet	Spare half octet 9.5	M	V	1/2
	Notification response message identity	Message type 9.7	M	V	1
50	PDU session status	PDU session status 9.11.3.44	O	TLV	4-34

8.2.24.2 PDU session status p. 806

This information element shall be included when the UE needs to indicate over non-3GPP access the PDU sessions that are associated with the 3GPP access type that are active within the UE.

8.2.25 Security mode command p. 806

8.2.25.1 Message definition p. 806

The SECURITY MODE COMMAND message is sent by the AMF to the UE to establish NAS signalling security. See Table 8.2.25.1.1.

Message type:

SECURITY MODE COMMAND

Significance:

dual

Direction:

network to UE

Table 8.2.25.1.1: SECURITY MODE COMMAND message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Extended protocol discriminator	Extended protocol discriminator 9.2	M	V	1
	Security header type	Security header type 9.3	M	V	1/2
	Spare half octet	Spare half octet 9.5	M	V	1/2
	Security mode command message identity	Message type 9.7	M	V	1
	Selected NAS security algorithms	NAS security algorithms 9.11.3.34	M	V	1
	ngKSI	NAS key set identifier 9.11.3.32	M	V	1/2
	Spare half octet	Spare half octet 9.5	M	V	1/2
	Replayed UE security capabilities	UE security capability 9.11.3.54	M	LV	3-9
E-	IMEISV request	IMEISV request 9.11.3.28	O	TV	1
57	Selected EPS NAS security algorithms	EPS NAS security algorithms 9.11.3.25	O	TV	2
36	Additional 5G security information	Additional 5G security information 9.11.3.12	O	TLV	3
78	EAP message	EAP message 9.11.2.2	O	TLV-E	7-1503
38	ABBA	ABBA 9.11.3.10	O	TLV	4-n
19	Replayed S1 UE security capabilities	S1 UE security capability 9.11.3.48A	O	TLV	4-7
55	AUN3 device security key	AUN3 device security key 9.11.3.107	O	TLV	36-257

8.2.25.2 IMEISV request p. 807

The AMF may include this information element to request the UE to send its IMEISV with the corresponding SECURITY MODE COMPLETE message.

8.2.25.3 Void

8.2.25.4 Selected EPS NAS security algorithms p. 807

This IE shall be included if the AMF supports N26 interface, the UE set the S1 mode bit to "S1 mode supported" in the 5GMM capability IE of the REGISTRATION REQUEST message, and the AMF needs to provide the selected EPS NAS security algorithms to the UE.

8.2.25.5 Additional 5G security information p. 807

The network shall include this IE if:

the network needs to provide the UE with horizontal derivation parameter; or
the applicable initial NAS message (i.e. REGISTRATION REQUEST, CONTROL PLANE SERVICE REQUEST or SERVICE REQUEST) does not successfully pass the integrity check at the AMF (see subclause 5.4.2.2).

8.2.25.6 EAP message p. 808

This IE is included when the EAP Success message is sent as part of the EAP based primary authentication and key agreement procedure, as specified in subclause 5.4.1.2.

8.2.25.7 ABBA p. 808

This IE shall be included if the message contains an EAP message IE with an EAP-success message.

8.2.25.8 Replayed S1 UE security capabilities p. 808

This IE shall be included if the Selected EPS NAS security algorithms information element is included.

8.2.25.9 AUN3 device security key |R18| p. 808

This IE shall be included when the SECURITY MODE COMMAND message is provided to a 5G-RG that is acting on behalf of an AUN3 device if the EAP message IE is set to an EAP-success message.

8.2.26 Security mode complete p. 808

8.2.26.1 Message definition p. 808

The SECURITY MODE COMPLETE message is sent by the UE to the AMF in response to a SECURITY MODE COMMAND message. See Table 8.2.26.1.1.

Message type:

SECURITY MODE COMPLETE

Significance:

dual

Direction:

UE to network

Table 8.2.26.1.1: SECURITY MODE COMPLETE message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Extended protocol discriminator	Extended protocol discriminator 9.2	M	V	1
	Security header type	Security header type 9.3	M	V	1/2
	Spare half octet	Spare half octet 9.5	M	V	1/2
	Security mode complete message identity	Message type 9.6	M	V	1
77	IMEISV	5GS mobile identity 9.11.3.4	O	TLV-E	12
71	NAS message container	NAS message container 9.11.3.33	O	TLV-E	4-n
78	non-IMEISV PEI	5GS mobile identity 9.11.3.4	O	TLV-E	7-n

8.2.26.2 IMEISV p. 808

The UE shall include this information element, if the IMEISV was requested within the corresponding SECURITY MODE COMMAND message.

8.2.26.3 NAS message container p. 808

The UE shall include this information element:

if during an ongoing registration procedure or service request procedure, the AMF included the Additional 5G security information with the RINMR bit set to "Retransmission of the initial NAS message requested" in the SECURITY MODE COMMAND message as described in TS 33.501; or
if during an ongoing registration procedure, the UE does not have a valid 5G NAS security context.

8.2.26.4 non-IMEISV PEI |R16| p. 809

Table 8.2.30.1.1: CONTROL PLANE SERVICE REQUEST message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Extended protocol discriminator	Extended protocol discriminator 9.2	M	V	1
	Security header type	Security header type 9.3	M	V	1/2
	Spare half octet	Spare half octet 9.5	M	V	1/2
	Control plane service request message identity	Message type 9.7	M	V	1
	Control plane service type	Control plane service type 9.11.3.18D	M	V	1/2
	ngKSI	NAS key set identifier 9.11.3.32	M	V	1/2
6F	CIoT small data container	CIoT small data container 9.11.3.18B	O	TLV	4-257
8-	Payload container type	Payload container type 9.11.3.40	O	TV	1
7B	Payload container	Payload container 9.11.3.39	O	TLV-E	4-65538
12	PDU session ID	PDU session identity 2 9.11.3.41	C	TV	2
50	PDU session status	PDU session status 9.11.3.44	O	TLV	4-34
F-	Release assistance indication	Release assistance indication 9.11.3.46A	O	TV	1
40	Uplink data status	Uplink data status 9.11.3.57	O	TLV	4-34
71	NAS message container	NAS message container 9.11.3.33	O	TLV-E	4-n
24	Additional information	Additional information 9.11.2.1	O	TLV	3-n
25	Allowed PDU session status	Allowed PDU session status 9.11.3.13	O	TLV	4-34
29	UE request type	UE request type 9.11.3.76	O	TLV	3
28	Paging restriction	Paging restriction 9.11.3.77	O	TLV	3-35

8.2.30.2 CIoT small data container p. 811

This IE shall be included if the UE needs to send uplink small user data, SMS or location services message that is not more than 254 bytes, and there is no other optional IE to be sent.

8.2.30.3 Payload container type p. 811

This IE shall be included if the UE includes the Payload container IE.

8.2.30.4 Payload container p. 811

This IE shall be included if the UE needs to send uplink CIoT user data, SMS or location services message.

8.2.30.5 PDU session ID p. 811

The UE shall include this IE when the Payload container type IE is set to "CIoT user data container".

8.2.30.6 PDU session status p. 812

This IE shall be included when the UE needs to indicate the PDU sessions that are associated with the access type that the message is sent over, that are active within the UE.

8.2.30.7 Release assistance indication p. 812

The UE may include this IE to inform the network whether:

no further uplink and no further downlink data transmission is expected; or
only a single downlink data transmission (e.g. acknowledgement or response to uplink data) and no further uplink data transmission subsequent to the uplink data transmission is expected.

8.2.30.8 Uplink data status p. 812

This IE shall be included if the UE has uplink user data pending to be sent over the user plane.

8.2.30.9 NAS message container p. 812

This IE shall be included if the UE is sending a CONTROL PLANE SERVICE REQUEST message as an initial NAS message and the UE needs to send non-cleartext IEs.

8.2.30.10 Additional information p. 812

The UE may include this IE when the Payload container type IE is set to "Location services message container".

8.2.30.11 Allowed PDU session status |R17| p. 812

This IE shall be included if the CONTROL PLANE SERVICE REQUEST message is sent as a response to paging with the access type indicating non-3GPP access or notification via 3GPP access for PDU session(s) associated with non-3GPP access.

8.2.30.12 UE request type |R17| p. 812

Table 8.2.35.1: RELAY KEY ACCEPT message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Extended protocol discriminator	Extended protocol discriminator 9.2	M	V	1
	Security header type	Security header type 9.3	M	V	1/2
	Spare half octet	Spare half octet 9.5	M	V	1/2
	Relay key accept message identity	Message type 9.7	M	V	1
	PRTI	ProSe relay transaction identity 9.11.3.88	M	V	1
	Relay key response parameters	Relay key response parameters 9.11.3.90	M	LV-E	51-65537
78	EAP message	EAP message 9.11.2.2	O	TLV-E	7-1503

8.2.35.2 EAP message p. 815

The AMF shall include the EAP message IE if the AMF has received an EAP-success message from the AUSF.

8.2.36 Relay key reject |R17| p. 815

8.2.36.1 Message definition p. 815

The RELAY KEY REJECT message is sent by the AMF to the UE to indicate the rejection of the relay key request. See Table 8.2.36.1.

Message type:

RELAY KEY REJECT

Significance:

dual

Direction:

network to UE

Table 8.2.36.1: RELAY KEY REJECT message content

IEI	Information Element	Type/Reference	Presence	Format	Length
	Extended protocol discriminator	Extended protocol discriminator 9.2	M	V	1
	Security header type	Security header type 9.3	M	V	1/2
	Spare half octet	Spare half octet 9.5	M	V	1/2
	Relay key reject message identity	Message type 9.7	M	V	1
	PRTI	ProSe relay transaction identity 9.11.3.88	M	V	1
78	EAP message	EAP message 9.11.2.2	O	TLV-E	7-1503

8.2.36.2 EAP message p. 815

EAP message IE is included if the RELAY KEY REJECT message is used to convey EAP-failure message.

8.2.37 Relay authentication request |R17| p. 816

8.2.37.1 Message definition p. 816

The RELAY AUTHENTICATION REQUEST message is sent by the network to the UE to initiate authentication of the 5G ProSe remote UE or the 5G ProSe end UE as specified in TS 33.503. See Table 8.2.37.1.

Message type:

RELAY AUTHENTICATION REQUEST

Significance:

dual

Direction:

Network to UE

Table 8.2.37.1: RELAY AUTHENTICATION REQUEST message content

Information Element	Type/Reference	Presence	Format	Length
Extended protocol discriminator	Extended protocol discriminator 9.2	M	V	1
Security header type	Security header type 9.3	M	V	1/2
Spare half octet	Spare half octet 9.5	M	V	1/2
Relay authentication request message identity	Message type 9.7	M	V	1
PRTI	roSe relay transaction identity 9.11.3.88	>M	V	1
EAP message	EAP message 9.11.2.2	M	LV-E	7-1503

8.2.38 Relay authentication response |R17| p. 816

8.2.38.1 Message definition p. 816

The RELAY AUTHENTICATION RESPONSE message is sent by the UE to the network to forward the authentication response from the 5G ProSe remote UE or the 5G ProSe end UE as specified in TS 33.503. See Table 8.2.38.1.

Message type:

RELAY AUTHENTICATION RESPONSE

Significance:

dual

Direction:

UE to network

Table 8.2.38.1: RELAY AUTHENTICATION RESPONSE message content

Information Element	Type/Reference	Presence	Format	Length
Extended protocol discriminator	Extended protocol discriminator 9.2	M	V	1
Security header type	Security header type 9.3	M	V	1/2
Spare half octet	Spare half octet 9.5	M	V	1/2
Relay authentication response message identity	Message type 9.7	M	V	1
PRTI	ProSe relay transaction identity 9.11.3.88	M	V	1
EAP message	EAP message 9.11.2.2	M	LV-E	6-1502