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

9.11.3.1 5GMM capability

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 5GMM capability information element is to provide the network with information concerning aspects of the UE related to the 5GCN or interworking with the EPS. The contents might affect the manner in which the network handles the operation of the UE.

The 5GMM capability information element is coded as shown in figure 9.11.3.1.1 and table 9.11.3.1.1.

The 5GMM capability is a type 4 information element with a minimum length of 3 octets and a maximum length of 15 octets.

8	7	6	5	4	3	2	1
5GMM capability IEI	octet 1
Length of 5GMM capability contents	octet 2
SGC	5G-IPHC-CP CIoT	N3 data	5G-CP CIoT	RestrictEC	LPP	HO attach	S1 mode	octet 3
RACS	NSSAA	5G-LCS	V2XCNPC5	V2XCEPC5	V2X-Uu	5G-UP CIoT	5GSRVCC	octet 4*
5G ProSe-l2relay	5G ProSe-dc	5G ProSe-dd	ER-NSSAI	5G-EHC-CP CIoT	multipleUP	WUSA	CAG	octet 5*
PR	RPR	PIV	NCR	NR-PSSI	5G ProSe-l3rmt	5G ProSe-l2rmt	5G ProSe-l3relay	octet 6*
MPSIU	UAS	NSAG	Ex-CAG	SSNPNSI	EventNotification	MINT	NSSRG	octet 7*
SBTS	NSR	LADN-DS	RANtiming	ECI	ESI	RCMAN	RCMAP	octet 8*
5G ProSe-l2end	5G ProSe-l3U2U relay	5G ProSe-l2U2U relay	RSLPS	SBNS	UN-PER	A2XNPC5	A2XEPC5	octet 9*
A2X-Uu	SLVI	TempNS	SUPL	LCS-UPP	PNS	RSLP	5G ProSe-l3end	octet 10*
LP-WUSPSAI-SI	ATUC	RSLPPU	RSLPVU	NSUC	RSLPL	NVL-SATNR	MCSIU	octet 11*
LWD	EF5L	MINT-EPS	5G ProSe-L2IMrelay	5G ProSe-L3IMrelay	MLCSUP	5G ProSe-MCI	OPHPAE	octet 12*
0spare	0spare	0spare	0spare	0spare	AIoTUR	NSSAA-EPC	NonSATLSP	octet 13*
0	0	0	0	0	0	0	0	octet 14-15
Spare

Figure 9.11.3.1.1: 5GMM capability information element

Table 9.11.3.1.1: 5GMM capability information element

EPC NAS supported (S1 mode) (octet 3, bit 1)Bit
1
0				S1 mode not supported
1				S1 mode supported

ATTACH REQUEST message containing PDN CONNECTIVITY REQUEST message for handover support (HO attach) (octet 3, bit 2)Bit
2
0				ATTACH REQUEST message containing PDN CONNECTIVITY REQUEST message with request type set to "handover" or "handover of emergency bearer services" to transfer PDU session from N1 mode to S1 mode not supported
1				ATTACH REQUEST message containing PDN CONNECTIVITY REQUEST message with request type set to "handover" or "handover of emergency bearer services" to transfer PDU session from N1 mode to S1 mode supported

LTE Positioning Protocol (LPP) capability (octet 3, bit 3)
This bit indicates the capability to support LTE Positioning Protocol (LPP) (see 3GPP TS 37.355 [26]).
Bit
3
0				LPP in N1 mode not supported
1				LPP in N1 mode supported

Restriction on use of enhanced coverage support (RestrictEC) (octet 3, bit 4)This bit indicates the capability to support restriction on use of enhanced coverage.Bit
4
0				Restriction on use of enhanced coverage not supported
1				Restriction on use of enhanced coverage supported

Control plane CIoT 5GS optimization (5G-CP CIoT) (octet 3, bit 5)This bit indicates the capability for control plane CIoT 5GS optimization.Bit
5
0				Control plane CIoT 5GS optimization not supported
1				Control plane CIoT 5GS optimization supported

N3 data transfer (N3 data) (octet 3, bit 6)This bit indicates the capability for N3 data transfer.Bit
6
0				N3 data transfer supported
1				N3 data transfer not supported

IP header compression for control plane CIoT 5GS optimization (5G-IPHC-CP CIoT) (octet 3, bit 7)This bit indicates the capability for IP header compression for control plane CIoT 5GS optimization.Bit
7
0				IP header compression for control plane CIoT 5GS optimization not supported
1				IP header compression for control plane CIoT 5GS optimization supported

Service gap control (SGC) (octet 3, bit 8)Bit
8
0				service gap control not supported
1				service gap control supported

5G-SRVCC from NG-RAN to UTRAN (5GSRVCC) capability (octet 4, bit 1)
This bit indicates the capability for 5G-SRVCC from NG-RAN to UTRAN (5GSRVCC) (see 3GPP TS 23.216 [6A]).
Bit
1
0				5G-SRVCC from NG-RAN to UTRAN not supported
1				5G-SRVCC from NG-RAN to UTRAN supported

User plane CIoT 5GS optimization (5G-UP CIoT) (octet 4, bit 2)This bit indicates the capability for user plane CIoT 5GS optimization.Bit
2
0				User plane CIoT 5GS optimization not supported
1				User plane CIoT 5GS optimization supported

V2X-Uu capability (V2X-Uu) (octet 4, bit 3)
This bit indicates the capability for V2X over Uu, as specified in 3GPP TS 24.587 [19B].Bit
3
0				V2X over Uu not supported
1				V2X over Uu supported

V2X communication over E-UTRA-PC5 capability (V2XCEPC5) (octet 4, bit 4)
This bit indicates the capability for V2X communication over E-UTRA-PC5, as specified in 3GPP TS 24.587 [19B].
Bit
4
0				V2X communication over E-UTRA-PC5 not supported
1				V2X communication over E-UTRA-PC5 supported

V2X communication over NR-PC5 capability (V2XCNPC5) (octet 4, bit 5)
This bit indicates the capability for V2X communication over NR-PC5, as specified in 3GPP TS 24.587 [19B].
Bit
5
0				V2X communication over NR-PC5 not supported
1				V2X communication over NR-PC5 supported

Location Services (5G-LCS) notification mechanisms capability (octet 4, bit 6)
This bit indicates the capability to support Location Services (5G-LCS) notification mechanisms (see 3GPP TS 23.273 [6B]).
Bit
6
0				LCS notification mechanisms not supported
1				LCS notification mechanisms supported

Network slice-specific authentication and authorization (NSSAA) (octet 4, bit 7)This bit indicates the capability to support network slice-specific authentication and authorization.Bit
7
0				Network slice-specific authentication and authorization not supported
1				Network slice-specific authentication and authorization supported

Radio capability signalling optimisation (RACS) capability (octet 4, bit 8)Bit
8
0				RACS not supported
1				RACS supported

Closed Access Group (CAG) capability (octet 5, bit 1)Bit
1
0				CAG not supported
1				CAG supported

WUS assistance (WUSA) information reception capability (octet 5, bit 2)Bit
2
0				WUS assistance information reception not supported
1				WUS assistance information reception supported

Multiple user-plane resources support (multipleUP) (octet 5, bit 3)
This bit indicates the capability to support multiple user-plane resources in NB-N1 mode.
Bit
3
0				Multiple user-plane resources not supported
1				Multiple user-plane resources supported


Ethernet header compression for control plane CIoT 5GS optimization (5G-EHC-CP CIoT) (octet 5, bit 4)Bit
4
0				Ethernet header compression for control plane CIoT 5GS optimization not supported
1				Ethernet header compression for control plane CIoT 5GS optimization supported

Extended rejected NSSAI support (ER-NSSAI) (octet 5, bit 5)
This bit indicates the capability to support extended rejected NSSAI.Bit
5
0				Extended rejected NSSAI not supported
1				Extended rejected NSSAI supported

5G ProSe direct discovery (5G ProSe-dd) (octet 5, bit 6)This bit indicates the capability for 5G ProSe direct discovery.Bit
6
0				5G ProSe direct discovery not supported
1				5G ProSe direct discovery supported

5G ProSe direct communication (5G ProSe-dc) (octet 5, bit 7)This bit indicates the capability for 5G ProSe direct communication.Bit
7
0				5G ProSe direct communication not supported
1				5G ProSe direct communication supported

5G ProSe layer-2 UE-to-network-relay (5G ProSe-l2relay) (octet 5, bit 8)This bit indicates the capability to act as a 5G ProSe layer-2 UE-to-network relay UE.Bit
8
0				Acting as a 5G ProSe layer-2 UE-to-network relay UE not supported
1				Acting as a 5G ProSe layer-2 UE-to-network relay UE supported

5G ProSe layer-3 UE-to-network-relay (5G ProSe-l3relay) (octet 6, bit 1)This bit indicates the capability to act as a 5G ProSe layer-3 UE-to-network relay UEBit
1
0				Acting as a 5G ProSe layer-3 UE-to-network relay UE not supported
1				Acting as a 5G ProSe layer-3 UE-to-network relay UE supported

5G ProSe layer-2 UE-to-network-remote (5G ProSe-l2rmt) (octet 6, bit 2)This bit indicates the capability to act as a 5G ProSe layer-2 UE-to-network remote UEBit
2
0				Acting as a 5G ProSe layer-2 UE-to-network remote UE not supported
1				Acting as a 5G ProSe layer-2 UE-to-network remote UE supported

5G ProSe layer-3 UE-to-network-remote (5G ProSe-l3rmt) (octet 6, bit 3)This bit indicates the capability to act as a 5G ProSe layer-3 UE-to-network remote UEBit
3
0				Acting as a 5G ProSe layer-3 UE-to-network remote UE not supported
1				Acting as a 5G ProSe layer-3 UE-to-network remote UE supported

NR paging subgroup support indication (NR-PSSI) (octet 6, bit 4)
This bit indicates the support of PEIPS assistance information for NR paging subgrouping
Bit
4
0				NR paging subgrouping not supported
1				NR paging subgrouping supported

N1 NAS signalling connection release (NCR) (octet 6, bit 5)
This bit indicates whether N1 NAS signalling connection release is supported.
Bit
5
0				N1 NAS signalling connection release not supported
1				N1 NAS signalling connection release supported

Paging indication for voice services (PIV) (octet 6, bit 6)
This bit indicates whether paging indication for voice services is supported.
Bit
6
0				paging indication for voice services not supported
1				paging indication for voice services supported

Reject paging request (RPR) (octet 6, bit 7)
This bit indicates whether reject paging request is supported.
Bit
7
0				reject paging request not supported
1				reject paging request supported

Paging restriction (PR) (octet 6, bit 8)
This bit indicates whether paging restriction is supported.
Bit
8
0				paging restriction not supported
1				paging restriction supported

NSSRG (octet 7, bit 1)
This bit indicates the capability to support the NSSRG.Bit
1
0				NSSRG not supported
1				NSSRG supported

Minimization of service interruption (MINT) (octet 7, bit 2)
This bit indicates the capability to support Minimization of service interruption (MINT)Bit
2
0				MINT not supported
1				MINT supported

Event notification (EventNotification) (octet 7, bit 3)
This bit indicates the capability to support event notification for upper layersBit
3
0				Event notification not supported
1				Event notification supported

SOR-SNPN-SI (SSNPNSI) (octet 7, bit 4)
This bit indicates the capability to support SOR-SNPN-SI.Bit
4
0				SOR-SNPN-SI not supported
1				SOR-SNPN-SI supported

Extended CAG information list support (Ex-CAG) (octet 7, bit 5)
This bit indicates the capability to support extended CAG information list.Bit
5
0				Extended CAG information list not supported
1				Extended CAG information list supported

NSAG (octet 7, bit 6)
This bit indicates the capability to support NSAG.Bit
6
0				NSAG not supported
1				NSAG supported

UAS (octet 7, bit 7)
This bit indicates the capability to support UAS services.Bit
7
0				UAS services not supported
1				UAS services supported

MPS indicator update (MPSIU) (octet 7, bit 8)
This bit indicates the capability to support MPS indicator update via the UE configuration update procedure.Bit
8
0				MPS indicator update not supported
1				MPS indicator update supported

Registration complete message for acknowledging negotiated PEIPS assistance information (RCMAP) (octet 8, bit 1)
This bit indicates the capability for sending REGISTRATION COMPLETE message when Negotiated PEIPS assistance information IE is included in the REGISTRATION ACCEPT message.Bit
1
0				Sending of REGISTRATION COMPLETE message for negotiated PEIPS assistance information not supported
1				Sending of REGISTRATION COMPLETE message for negotiated PEIPS assistance information supported

Registration complete message for acknowledging NSAG information (RCMAN) (octet 8, bit 2)
This bit indicates the capability for sending REGISTRATION COMPLETE message when NSAG information IE is included in the REGISTRATION ACCEPT message.Bit
2
0				Sending of REGISTRATION COMPLETE message for NSAG information not supported
1				Sending of REGISTRATION COMPLETE message for NSAG information supported

Equivalent SNPNs indicator (ESI) (octet 8, bit 3)
This bit indicates the capability to support equivalent SNPNs.Bit
3
0				Equivalent SNPNs not supported
1				Equivalent SNPNs supported

Enhanced CAG information (ECI) (octet 8, bit 4)
This bit indicates the capability to support enhanced CAG information.Bit
4
0				Enhanced CAG information not supported
1				Enhanced CAG information supported

Reconnection to the network due to RAN timing synchronization status change (RANtiming) (octet 8, bit 5)
This bit indicates the capability to support Reconnection to the network due to RAN timing synchronization status change.Bit
5
0				Reconnection to the network due to RAN timing synchronization status change not supported
1				Reconnection to the network due to RAN timing synchronization status change supported

LADN per DNN and S-NSSAI support (LADN-DS) (octet 8, bit 6)
This bit indicates the capability to support LADN per DNN and S-NSSAI.Bit
6
0				LADN per DNN and S-NSSAI not supported
1				LADN per DNN and S-NSSAI supported

Network slice replacement (NSR) (octet 8, bit 7)This bit indicates the capability to support network slice replacement.Bit
7
0				Network slice replacement not supported
1				Network slice replacement supported

Slice-based TNGF selection support (SBTS) (octet 8, bit 8)
This bit indicates the capability to support slice-based TNGF selection.Bit
8
0				Slice-based TNGF selection not supported
1				Slice-based TNGF selection supported

A2X over E-UTRA-PC5 (A2XEPC5) (octet 9, bit 1)
This bit indicates the capability for A2X over E-UTRA-PC5, as specified in 3GPP TS 24.577 [60].Bit
1
0				A2X over E-UTRA-PC5 not supported
1				A2X over E-UTRA-PC5 supported

A2X over NR-PC5 (A2XNPC5) (octet 9, bit 2)
This bit indicates the capability for A2X over NR-PC5, as specified in 3GPP TS 24.577 [60].Bit
2
0				A2X over NR-PC5 not supported
1				A2X over NR-PC5 supported

Unavailability period (UN-PER) (octet 9, bit 3)
This bit indicates the capability to support unavailability period.
Bit
3
0				Unavailability period not supported
1				Unavailability period supported

Slice-based N3IWFselection support (SBNS) (octet 9, bit 4)
This bit indicates the capability to support slide-based N3IWF selection
Bit
4
0				Slice-based N3IWF selection not supported
1				Slice-based N3IWF selection supported

SL positioning server UE (RSLPS) (octet 9, bit 5)
This bit indicates the capability for SL positioning server UE, as specified in 3GPP TS 24.586 [ts23586].
Bit
5
0				Ranging and sidelink positioning for SL positioning server UE not supported
1				Ranging and sidelink positioning for SL positioning server UE supported

5G ProSe layer-2 UE-to-UE relay (5G ProSe-l2U2U relay) (octet 9, bit 6)
This bit indicates the capability to act as a 5G ProSe layer-2 UE-to-UE relay UE.
Bit
6
0				Acting as a 5G ProSe layer-2 UE-to-UE relay UE not supported
1				Acting as a 5G ProSe layer-2 UE-to-UE relay UE supported

5G ProSe layer-3 UE-to-UE relay (5G ProSe-l3U2U relay) (octet 9, bit 7)
This bit indicates the capability to act as a 5G ProSe layer-3 UE-to-UE relay UE.
Bit
7
0				Acting as a 5G ProSe layer-3 UE-to-UE relay UE not supported
1				Acting as a 5G ProSe layer-3 UE-to-UE relay UE supported

5G ProSe layer-2 end UE (5G ProSe-l2end) (octet 9, bit 8)
This bit indicates the capability to act as a 5G ProSe layer-2 end UE.
Bit
8
0				Acting as a 5G ProSe layer-2 UE-to-UE relay end UE not supported
1				Acting as a 5G ProSe layer-2 UE-to-UE relay end UE supported

5G ProSe layer-3 end UE (5G ProSe-l3end) (octet 10, bit 1)
This bit indicates the capability to act as a 5G ProSe layer-3 end UE.
Bit
1
0				Acting as a 5G ProSe layer-3 end UE not supported
1				Acting as a 5G ProSe layer-3 end UE supported

Ranging and sidelink positioning support (RSLP) (octet 10, bit 2)
Bit
2
0				Ranging and sidelink positioning not supported
1				Ranging and sidelink positioning supported

Partial network slice (PNS) (octet 10, bit 3)
This bit indicates whether the UE support partial network slice in the registration area.
Bit
3
0				Partial network slice not supported
1				Partial network slice supported

LCS-UPP user plane positioning (LCS-UPP) (octet 10, bit 4)
This bit indicates the capability to support LCS-UPP user plane positioning (see 3GPP TS 23.273 [6B]).
Bit
4
0				User plane positioning using LCS-UPP not supported
1				User plane positioning using LCS-UPP supported

SUPL user plane positioning (SUPL) (octet 10, bit 5)
This bit indicates the capability to support SUPL user plane positioning (see 3GPP TS 38.305 [67] and 3GPP TS 23.271 [68]).
Bit
5
0				User plane positioning using SUPL not supported
1				User plane positioning using SUPL supported

S-NSSAI time validity information (TempNS) (octet 10, bit 6)
This bit indicates the capability to support the S-NSSAI time validity information.
Bit
6
0				S-NSSAI time validity information not supported
1				S-NSSAI time validity information supported

S-NSSAI location validity information (SLVI) (octet 10, bit 7)
This bit indicates the capability to support S-NSSAI location validity information.
Bit
7
0				S-NSSAI location validity information not supported
1				S-NSSAI location validity information supported

A2X over Uu capability (A2X-Uu) (octet 10, bit 8)
This bit indicates the capability for A2X over Uu, as specified in 3GPP TS 24.577 [60].
Bit
8
0				A2X over Uu not supported
1				A2X over Uu supported

MCS indicator update (MCSIU) (octet 11, bit 1)
This bit indicates the capability to support MCS indicator update via the UE configuration update procedure.
Bit
1
0				MCS indicator update not supported
1				MCS indicator update supported

Network verified UE location over satellite NG-RAN (NVL-SATNR) (octet 11, bit 2)
This bit indicates the capability to support network verified UE location over satellite NG-RAN as specified in 3GPP TS 23.501 [8].
Bit
2
0				Network verified UE location over satellite NG-RAN not supported
1				Network verified UE location over satellite NG-RAN supported

Ranging and sidelink positioning over PC5 for located UE support (RSLPL) (octet 11, bit 3)This bit indicates the capability to support ranging and sidelink positioning over PC5 for located UE support.
Bit
3
0				Ranging and sidelink positioning for located UE not supported
1				Ranging and sidelink positioning for located UE supported

Network slice usage control (NSUC) (octet 11, bit 4)
This bit indicates the capability to support network slice usage control.
Bit
4
0				Network slice usage control not supported
1				Network slice usage control supported

Ranging and sidelink positioning with V2X capable UE (RSLPVU) (octet 11, bit 5) (see NOTE 1)

Bit
5
0				Ranging and sidelink positioning with V2X capable UE not supported
1				Ranging and sidelink positioning with V2X capable UE supported

Ranging and sidelink positioning with 5G ProSe capable UE support (RSLPPU) (octet 11, bit 6) (see NOTE 1)
Bit
6
0				Ranging and sidelink positioning with 5G ProSe capable UE not supported
1				Ranging and sidelink positioning with 5G ProSe capable UE supported

Access technology utilization control (ATUC) (octet 11, bit 7)
This bit indicates the support of access technology utilization control.
Bit
7
0				access technology utilization control not supported
1				access technology utilization control supported

LP-WUSPS assistance information support indication (LP-WUSPSAI-SI) (octet 11, bit 8)
This bit indicates the support of LP-WUSPS assistance information.
Bit
8
0				LP-WUSPS assistance information not supported
1				LP-WUSPS assistance information supported

Operator policy for high priority access exemptions for service area restrictions (OPHPAE) (octet 12, bit 1)
This bit indicates the capability to support operator policy for high priority access exemptions for service area restrictions.
Bit
1
0				Operator policy for high priority access exemption for service area restrictions is not supported
1				Operator policy for high priority access exemption for service area restrictions is supported

5G ProSe Multi-hop relay communication indication (5G ProSe-MCI) (octet 12, bit 2) (see NOTE 2)
This bit indicates the support of multi-hop relay communication capability.
Bit
2
0				Multi-hop relay communication not supported
1				Multi-hop relay communication supported

Multiple LCS secured user plane connections (MLCSUP) (octet 12, bit 3)
This bit indicates the capability to support multiple LCS secured user plane connections (see 3GPP TS 23.273 [6B]).
Bit
3
0				Multiple LCS secured user plane connections not supported
1				Multiple LCS secured user plane connections supported

5G ProSe layer-3 intermediate UE-to-network relay UE (5G ProSe-L3IMrelay) (octet 12, bit 4)
This bit indicates the capability to act as a 5G ProSe layer-3 intermediate UE-to-network relay UE.
Bit
4
0				Acting as a 5G ProSe layer-3 intermediate UE-to-network relay UE not supported
1				Acting as a 5G ProSe layer-3 intermediate UE-to-network relay UE supported

5G ProSe layer-2 intermediate UE-to-network relay UE (5G ProSe-L2IMrelay) (octet 12, bit 5)
This bit indicates the capability to act as a 5G ProSe layer-2 intermediate UE-to-network relay UE.
Bit
5
0				Acting as a 5G ProSe layer-2 intermediate UE-to-network relay UE not supported
1				Acting as a 5G ProSe layer-2 intermediate UE-to-network relay UE supported

Minimization of service interruption support in EPS (MINT-EPS) (octet 12, bit 6)This bit indicates the capability to support MINT-EPS.
Bit
6
0				MINT-EPS not supported
1				MINT-EPS supported

ExtendedFacility IE for 5G LCS (EF5L) (octet 12, bit 7)
This bit indicates the capability to support ExtendedFacility IE for 5G LCS.
Bit
7
0				ExtendedFacility IE for 5G LCS not supported
1				ExtendedFacility IE for 5G LCS supported

LP-WUS disabling (LWD) (octet 12, bit 8)
This bit indicates the capability to support LP-WUS disabling.
Bit
8
0				LP-WUS disabling not supported
1				LP-WUS disabling supported
Non satellite lower PLMN selection (NonSATLSP) (octet 13, bit 1)
This bit indicates the capability for UE supporting lower PLMN selection feature to receive 5GMM cause #78 from NG-RAN access technology
Bit
1
0				NonSATLSP not supported
1				NonSATLSP supported

NSSAA over EPC (NSSAA-EPC) (octet 13, bit 2)This bit indicates the capability to support NSSAA over EPC.Bit
2
0				NSSAA over EPC not supported
1				NSSAA over EPC supported

AIoT UE Reader (AIoTUR) (octet 13, bit 3)
This bit indicates the capability to operate as an AIoT UE reader.
Bit
3
0				Operating as an AIoT UE reader not supported
1				Operating as an AIoT UE reader supported

Bits 4 to 8 in octet 13 and bits in octets 14 to 15 are spare and shall be coded as zero, if the respective octet is included in the information element.

NOTE 1: If both the RSLPVU bit is set to "Ranging and sidelink positioning with V2X capable UE not supported" and the RSLPPU bit is set to "Ranging and sidelink positioning with 5G ProSe capable UE not supported" in the 5GMM capability IE, then the receiving entity shall ignore the RSLPVU bit and the RSLPPU bit.NOTE 2: If the 5G ProSe-MCI bit is set to "Muti-hop relay communication supported", then at least one of the following bits should be included in the 5GMM capability IE and set to 1: "5G ProSe-l2relay", "5G ProSe-l3relay", "5G ProSe-l2rmt", "5G ProSe-l3rmt", "5G ProSe-l3U2U relay", "5G ProSe-l3end", "5G ProSe-L2IMrelay" or "5G ProSe-L3IMrelay". The UE supporting only multi-hop UE-to-network relay or multi-hop UE-to-UE relay as specified in 3GPP TS 24.554 [19E] shall set the 5G ProSe-MCI bit to "Multi-hop relay communication supported" along with the corresponding 5GMM capability IE(s).