Content for TS 23.501 Word version: 18.5.0

1… 3… 4.2.3 4.2.4 4.2.5… 4.2.8… 4.2.8.2.2 4.2.8.2.3… 4.2.8.4… 4.2.9… 4.2.15… 4.3… 4.3.3 4.3.4 4.3.5 4.4… 4.4.6… 4.4.8… 5… 5.3… 5.3.3… 5.4… 5.5… 5.6… 5.6.7… 5.7… 5.7.2… 5.7.3… 5.7.4 5.7.5… 5.8… 5.8.2.11… 5.9… 5.10… 5.11… 5.15… 5.15.11… 5.16… 5.17… 5.18… 5.19… 5.21… 5.22… 5.27… 5.28… 5.29… 5.30… 5.31… 5.32… 5.32.6… 5.33… 5.34… 5.35… 5.38… 5.43… 6… 6.3… 6.3.8… 7… 7.2… 8… 8.2.4 8.2.5… 8.3… A… D… E… F G… G.3 G.4… H… J K… M… N… O… P…

K.1 Standardized port and user plane node management information K.2 Port and user plane node management information exchange for time synchronization K.2.1 Capability exchange K.2.2 PTP Instance configuration K.2.2.1 General K.2.2.2 Configuration for Sync and Announce reception timeouts K.2.2.3 Configuration for PTP port states K.2.2.4 Configuration for PTP grandmaster function K.2.2.5 Configuration for Sync and Announce intervals K.2.2.6 Configuration for transport protocols
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K (Normative) Port and user plane node management information exchange |R17| p. 635

K.1 Standardized port and user plane node management information p. 635

Table K.1-1 and Table K.1-2 list standardized port management information and user plane node management information, respectively.

Table K.1-1: Standardized port management information

Port management information	Applicability (6)		Supported operations by TSN AF (1)	Supported operations by TSCTSF (1)	Reference
Port management information	DS-TT	NW-TT	Supported operations by TSN AF (1)	Supported operations by TSCTSF (1)	Reference
General
Port management capabilities (2)	X	X	R	R
Bridge delay related information
txPropagationDelay	X	X	R	–	IEEE Std 802.1Q [98] section 12.32.2.1
txPropagationDelayDeltaThreshold (23)	X	X	RW
Traffic class related information
Traffic class table	X	X	RW	–	IEEE Std 802.1Q [98] section 12.6.3 and section 8.6.6.
Gate control information
queueMaxSDUTable					IEEE Std 802.1Q [98], section 12.29.1
> queueMaxSDU	X	X	RW		IEEE Std 802.1Q [98], section 12.29.1
> TransmissionOverrun (see NOTE 3)	X	X	R	–	IEEE Std 802.1Q [98], section 12.29.1
GateEnabled	X	X	RW	–	IEEE Std 802.1Q [98] Table 12-32
AdminGateStates	X	X	RW		IEEE Std 802.1Q [98] Table 12-32
AdminBaseTime	X	X	RW	–	IEEE Std 802.1Q [98] Table 12-32
AdminControlList	X	X	RW	–	IEEE Std 802.1Q [98] Table 12-32
AdminCycleTime (3)	X	X	RW	–	IEEE Std 802.1Q [98] Table 12-32
AdminControlListLength (3)	X	X	RW	–	IEEE Std 802.1Q [98] Table 12-32
AdminCycleTimeExtension	X	X	RW	–	IEEE Std 802.1Q [98] Table 12-32
Tick granularity	X	X	R	–	IEEE Std 802.1Q [98] Table 12-32
Tick SupportedListMax	X	X	R	–	IEEE Std 802.1Q [98] Table 12-32
General Neighbor discovery configuration (4)
adminStatus	D	X	RW	–	IEEE 802.1AB [97] section 9.2.5.1
lldpV2LocChassisIdSubtype	D	X	RW	–	IEEE 802.1AB [97] Table 11-2
lldpV2LocChassisId	D	X	RW	–	IEEE 802.1AB [97] Table 11-2
lldpV2MessageTxInterval	D	X	RW	–	IEEE 802.1AB [97] Table 11-2
lldpV2MessageTxHoldMultiplier	D	X	RW	–	IEEE 802.1AB [97] Table 11-2
NW-TT port neighbor discovery configuration
lldpV2LocPortIdSubtype		X	RW	–	IEEE 802.1AB [97] Table 11-2
lldpV2LocPortId		X	RW	–	IEEE 802.1AB [97] Table 11-2
DS-TT port neighbor discovery configuration
lldpV2LocPortIdSubtype	D		RW	–	IEEE 802.1AB [97] Table 11-2
lldpV2LocPortId	D		RW	–	IEEE 802.1AB [97] Table 11-2
Neighbor discovery information for each discovered neighbor of NW-TT (26)
lldpV2RemChassisIdSubtype		X	R	–	IEEE 802.1AB [97] Table 11-2
lldpV2RemChassisId		X	R	–	IEEE 802.1AB [97] Table 11-2
lldpV2RemPortIdSubtype		X	R	–	IEEE 802.1AB [97] Table 11-2
lldpV2RemPortId		X	R	–	IEEE 802.1AB [97] Table 11-2
TTL		X	R	–	IEEE 802.1AB [97] section 8.5.4
Neighbor discovery information for each discovered neighbor of DS-TT (5)
lldpV2RemChassisIdSubtype	D		R	–	IEEE 802.1AB [97] Table 11-2
lldpV2RemChassisId	D		R	–	IEEE 802.1AB [97] Table 11-2
lldpV2RemPortIdSubtype	D		R	–	IEEE 802.1AB [97] Table 11-2
lldpV2RemPortId	D		R	–	IEEE 802.1AB [97] Table 11-2
TTL	D		R	–	IEEE 802.1AB [97] section 8.5.4.1
Information for deterministic networking for each NW-TT port (27)
Interface information
Interface type		X		R	RFC 8343
Interface enabled status		X		R	RFC 8343
phys-address		X		R	RFC 8343
IPv4 information
IPv4 enabled status		X		R	RFC 8344
IPv4 forwarding status		X		R	RFC 8344
IPv4 MTU		X		R	RFC 8344
Information for each IPv4 address
IPv4 address		X		R	RFC 8344
prefix-length		X		R	RFC 8344
netmask		X		R	RFC 8344
origin		X		R	RFC 8344
Information for each IPv4 neighbor
IPv4 address		X		R	RFC 8344
link-layer-address		X		R	RFC 8344
origin		X		R	RFC 8344
IPv6 information
IPv6 enabled status		X		R	RFC 8344
IPv6 forwarding status		X		R	RFC 8344
IPv6 MTU		X		R	RFC 8344
Information for each IPv6 address
IPv6 address		X		R	RFC 8344
prefix-length		X		R	RFC 8344
origin		X		R	RFC 8344
status		X		R	RFC 8344
Information for each IPv6 neighbor
IPv6 address		X		R	RFC 8344
link-layer-address		X		R	RFC 8344
origin		X		R	RFC 8344
is-router		X		R	RFC 8344
state		X		R	RFC 8344
Stream Parameters (11)
MaxStreamFilterInstances	X		R	–	IEEE Std 802.1Q [98] section 12.31.1.1
MaxStreamGateInstances	X		R	–	IEEE Std 802.1Q [98] section 12.31.1.2
MaxFlowMeterInstances	X		R	–	IEEE Std 802.1Q [98] section 12.31.1.3
SupportedListMax	X		R	–	IEEE Std 802.1Q [98] section 12.31.1.4
Per-Stream Filtering and Policing information (10)
Stream Filter Instance Table (8)				–	IEEE Std 802.1Q [98] Table 12-35
> StreamFilterInstanceIndex	X	X	RW	–	IEEE Std 802.1Q [98] Table 12-35
> Stream Identification type	X	X	RW	–	IEEE 802.1CB [83] section 9.1.1.6
> Stream Identification Controlling Parameters	X	X	RW	–	IEEE 802.1CB [83] sections 9.1.2, 9.1.3, 9.1.4 (12)
> PrioritySpec	X	X	RW	–	IEEE Std 802.1Q [98] Table 12-35
> StreamGateInstanceID	X	X	RW	–	IEEE Std 802.1Q [98] Table 12-35
Stream Gate Instance Table (9)				–	IEEE Std 802.1Q [98] Table 12-36
StreamGateInstanceIndex	X	X	RW	–	IEEE Std 802.1Q [98] Table 12-36
StreamGateAdminBaseTime	X	X	RW	–	IEEE Std 802.1Q [98] Table 12-36
StreamGateAdminControlList	X	X	RW	–	IEEE Std 802.1Q [98] Table 12-36
StreamGateAdminCycleTime	X	X	RW	–	IEEE Std 802.1Q [98] Table 12-36
StreamGateTickGranularity	X	X	R	–	IEEE Std 802.1Q [98] Table 12-36
StreamGateAdminCycleTimeExtension	X	X	R	–	IEEE Std 802.1Q [98] Table 12-36
Time Synchronization Information
TSN Time domain number (24)	X	X	RW
Supported PTP instance types (13)	X		R	R	IEEE Std 1588 [126] section 8.2.1.5.5
Supported transport types (14)	X		R	R
Supported delay mechanisms (15)	X		R	R	IEEE Std 1588 [126] section 8.2.15.4.4
PTP grandmaster capable (16)	X		R	R
gPTP grandmaster capable (17)	X		R	R
Supported PTP profiles (18)	X		R	R
Number of supported PTP instances	X		R	R
PTP instance specification
PTP Instance ID (25)	X	X	RW	RW
> PTP profile (19)	X		RW	RW
> Transport type (20)	X		RW	RW
> Grandmaster enabled (21)	X		RW	RW
IEEE Std 1588 [126] data sets (NOTE 22)
> defaultDS.clockIdentity	X		RW	RW	IEEE Std 1588 [126] section 8.2.1.2.2
> defaultDS.clockQuality.clockClass	X		RW	RW	IEEE Std 1588 [126] section 8.2.1.3.1.2
> defaultDS.clockQuality.clockAccuracy	X		RW	RW	IEEE Std 1588 [126] section 8.2.1.3.1.3
> defaultDS.clockQuality.offsetScaledLogVariance	X		RW	RW	IEEE Std 1588 [126] section 8.2.1.3.1.4
> defaultDS.priority1	X		RW	RW	IEEE Std 1588 [126] section 8.2.1.4.1
> defaultDS.priority2	X		RW	RW	IEEE Std 1588 [126] section 8.2.1.4.2
> defaultDS.domainNumber	X		RW	RW	IEEE Std 1588 [126] section 8.2.1.4.3
> defaultDS.sdoId	X		RW	RW	IEEE Std 1588 [126] section 8.2.1.4.5
> defaultDS.instanceEnable	X		RW	RW	IEEE Std 1588 [126] section 8.2.1.5.2
> defaultDS.instanceType	X		RW	RW	IEEE Std 1588 [126] section 8.2.1.5.5
> portDS.portIdentity	X	X	RW	RW	IEEE Std 1588 [126] section 8.2.15.2.1
> portDS.portState	X	X	R	R	IEEE Std 1588 [126] section 8.2.15.3.1
> portDS.logMinDelayReqInterval	X	X	RW	RW	IEEE Std 1588 [126] section 8.2.15.3.2
> portDS.logAnnounceInterval	X	X	RW	RW	IEEE Std 1588 [126] section 8.2.15.4.1
> portDS.announceReceiptTimeout		X	RW	RW	IEEE Std 1588 [126] section 8.2.15.4.2
> portDS.logSyncInterval	X	X	RW	RW	IEEE Std 1588 [126] section 8.2.15.4.3
> portDS.delayMechanism	X	X	RW	RW	IEEE Std 1588 [126] section 8.2.15.4.4
> portDS.logMinPdelayReqInterval	X	X	RW	RW	IEEE Std 1588 [126] section 8.2.15.4.5
> portDS.versionNumber	X	X	RW	RW	IEEE Std 1588 [126] section 8.2.15.4.6
> portDS.minorVersionNumber	X	X	RW	RW	IEEE Std 1588 [126] section 8.2.15.4.7
> portDS.delayAsymmetry	X	X	RW	RW	IEEE Std 1588 [126] section 8.2.15.4.8
> portDS.portEnable	X	X	RW	RW	IEEE Std 1588 [126] section 8.2.15.5.1
> timePropertiesDS.currentUtcOffset	X		RW	RW	IEEE Std 1588 [126] section 8.2.4.2
> timePropertiesDS.timeSource	X		RW	RW	IEEE Std 1588 [126] section 8.2.4.9
> externalPortConfigurationPortDS.desiredState			RW	RW	IEEE Std 1588 [126] section 15.5.3.7.15.1
IEEE Std 802.1AS [104] data sets (NOTE 22)
> defaultDS.clockIdentity	X		RW	RW	IEEE Std 802.1AS [104] section 14.2.2
> defaultDS.clockQuality.clockClass	X		RW	RW	IEEE Std 802.1AS [104] section 14.2.4.2
> defaultDS.clockQuality.clockAccuracy	X		RW	RW	IEEE Std 802.1AS [104] section 14.2.4.3
> defaultDS.clockQuality.offsetScaledLogVariance	X		RW	RW	IEEE Std 802.1AS [104] section 14.2.4.4
> defaultDS.priority1	X		RW	RW	IEEE Std 802.1AS [104] section 14.2.5
> defaultDS.priority2	X		RW	RW	IEEE Std 802.1AS [104] section 14.2.6
> defaultDS.timeSource	X		RW	RW	IEEE Std 802.1AS [104] section 14.2.15
> defaultDS.domainNumber	X		RW	RW	IEEE Std 802.1AS [104] section 14.2.16
> defaultDS.sdoId	X		RW	RW	IEEE Std 802.1AS [104] section 14.2.4.3
> defaultDS.instanceEnable	X		RW	–	IEEE Std 802.1AS [104] section 14.2.19
> portDS.portIdentity		X	RW	RW	IEEE Std 802.1AS [104] section 14.8.2
> portDS.portState		X	R	R	IEEE Std 802.1AS [104] section 14.8.3
> portDS.ptpPortEnabled	X	X	RW	RW	IEEE Std 802.1AS [104] section 14.8.4
> portDS.delayMechanism	X	X	RW	RW	IEEE Std 802.1AS [104] section 14.8.5
> portDS.isMeasuringDelay	X	X	R	R	IEEE Std 802.1AS [104] section 14.8.6
> portDS.asCapable	X	X	R	R	IEEE Std 802.1AS [104] section 14.8.7
> portDS.meanLinkDelay	X	X	R	R	IEEE Std 802.1AS [104] section 14.8.8
> portDS.meanLinkDelayThresh	X	X	RW	RW	IEEE Std 802.1AS [104] section 14.8.9
> portDS.delayAsymmetry	X	X	RW	RW	IEEE Std 802.1AS [104] section 14.8.10
> portDS.neighborRateRatio	X	X	R	R	IEEE Std 802.1AS [104] section 14.8.11
> portDS.initialLogAnnounceInterval	X	X	RW	RW	IEEE Std 802.1AS [104] section 14.8.12
> portDS.currentLogAnnounceInterval	X	X	R	R	IEEE Std 802.1AS [104] section 14.8.13
> portDS.useMgtSettableLogAnnounceInterval	X	X	RW	RW	IEEE Std 802.1AS [104] section 14.8.14
> portDS.mgtSettableLogAnnounceInterval	X	X	RW	RW	IEEE Std 802.1AS [104] section 14.8.15
> portDS.announceReceiptTimeout		X	RW	RW	IEEE Std 802.1AS [104] section 14.8.16
> portDS.initialLogSyncInterval	X	X	RW	RW	IEEE Std 802.1AS [104] section 14.8.17
> portDS.currentLogSyncInterval	X	X	R	R	IEEE Std 802.1AS [104] section 14.8.18
> portDS.useMgtSettableLogSyncInterval	X	X	RW	RW	IEEE Std 802.1AS [104] section 14.8.19
> portDS.mgtSettableLogSyncInterval	X	X	RW	RW	IEEE Std 802.1AS [104] section 14.8.20
> portDS.syncReceiptTimeout		X	RW	RW	IEEE Std 802.1AS [104] section 14.8.21
> portDS.syncReceiptTimeoutTimeInterval		X	RW	RW	IEEE Std 802.1AS [104] section 14.8.22
> portDS.initialLogPdelayReqInterval	X	X	RW	RW	IEEE Std 802.1AS [104] section 14.8.23
> portDS.currentLogPdelayReqInterval	X	X	R	R	IEEE Std 802.1AS [104] section 14.8.24
> portDS.useMgtSettableLogPdelayReqInterval	X	X	RW	RW	IEEE Std 802.1AS [104] section 14.8.25
> portDS.mgtSettableLogPdelayReqInterval	X	X	RW	RW	IEEE Std 802.1AS [104] section 14.8.26
> portDS.initialLogGptpCapableMessageInterval	X	X	RW	RW	IEEE Std 802.1AS [104] section 14.8.27
> portDS.currentLogGptpCapableMessageInterval	X	X	R	R	IEEE Std 802.1AS [104] section 14.8.28
> portDS.useMgtSettableLogGptpCapableMessageInterval	X	X	RW	RW	IEEE Std 802.1AS [104] section 14.8.29
> portDS.mgtSettableLogGptpCapableMessageInterval	X	X	RW	RW	IEEE Std 802.1AS [104] section 14.8.30
> portDS.initialComputeNeighborRateRatio	X	X	RW	RW	IEEE Std 802.1AS [104] section 14.8.31
> portDS.currentComputeNeighborRateRatio	X	X	R	R	IEEE Std 802.1AS [104] section 14.8.32
> portDS.useMgtSettableComputeNeighborRateRatio	X	X	RW	RW	IEEE Std 802.1AS [104] section 14.8.33
> portDS.mgtSettableComputeNeighborRateRatio	X	X	RW	RW	IEEE Std 802.1AS [104] section 14.8.34
> portDS.initialComputeMeanLinkDelay	X	X	RW	RW	IEEE Std 802.1AS [104] section 14.8.35
> portDS.currentComputeMeanLinkDelay	X	X	R	R	IEEE Std 802.1AS [104] section 14.8.36
> portDS.useMgtSettableComputeMeanLinkDelay	X	X	RW	RW	IEEE Std 802.1AS [104] section 14.8.37
> portDS.mgtSettableComputeMeanLinkDelay	X	X	RW	RW	IEEE Std 802.1AS [104] section 14.8.38
> portDS.allowedLostResponses	X	X	RW	RW	IEEE Std 802.1AS [104] section 14.8.39
> portDS.allowedFaults	X	X	RW	RW	IEEE Std 802.1AS [104] section 14.8.40
> portDS.gPtpCapableReceiptTimeout	X	X	RW	RW	IEEE Std 802.1AS [104] section 14.8.41
> portDS.versionNumber	X	X	RW	RW	IEEE Std 802.1AS [104] section 14.8.42
> portDS.nup	X	X	RW	RW	IEEE Std 802.1AS [104] section 14.8.43
> portDS.ndown	X	X	RW	RW	IEEE Std 802.1AS [104] section 14.8.44
> portDS.oneStepTxOper	X	X	R	R	IEEE Std 802.1AS [104] section 14.8.45
> portDS.oneStepReceive	X	X	R	R	IEEE Std 802.1AS [104] section 14.8.46
> portDS.oneStepTransmit	X	X	R	R	IEEE Std 802.1AS [104] section 14.8.47
> portDS.initialOneStepTxOper	X	X	RW	RW	IEEE Std 802.1AS [104] section 14.8.48
> portDS.currentOneStepTxOper	X	X	RW	RW	IEEE Std 802.1AS [104] section 14.8.49
> portDS.useMgtSettableOneStepTxOper	X	X	RW	RW	IEEE Std 802.1AS [104] section 14.8.50
> portDS.mgtSettableOneStepTxOper	X	X	RW	RW	IEEE Std 802.1AS [104] section 14.8.51
> portDS.syncLocked	X	X	R	R	IEEE Std 802.1AS [104] section 14.8.52
> portDS.pdelayTruncatedTimestampsArray	X	X	RW	RW	IEEE Std 802.1AS [104] section 14.8.53
> portDS.minorVersionNumber	X	X	RW	RW	IEEE Std 802.1AS [104] section 14.8.54
> timePropertiesDS.currentUtcOffset	X		RW	RW	IEEE Std 802.1AS [104] section 14.5.2
> externalPortConfigurationPortDS.desiredState		X	RW	RW	IEEE Std 802.1AS [104] section 14.12.2
NOTE 1: R = Read only access; RW = Read/Write access; – = not supported. NOTE 2: Indicates which standardized and deployment-specific port management information is supported by DS-TT or NW-TT. NOTE 3: AdminCycleTime and AdminControlListLength are optional for gate control information. NOTE 4: If DS-TT supports neighbor discovery, then TSN AF sends the general neighbor discovery configuration for DS-TT Ethernet ports to DS-TT. If DS-TT does not support neighbor discovery, then TSN AF sends the general neighbor discovery configuration for DS-TT Ethernet ports to NW-TT using the User Plane Node Management Information Container (refer to Table K.1-2) and NW-TT performs neighbor discovery on behalf on DS-TT. When a parameter in this group is changed, it is necessary to provide the change to every DS-TT and the NW-TT that belongs to the 5GS TSN bridge. It is mandatory that the general neighbor discovery configuration is identical for all DS-TTs and the NW-TTs that belongs to the bridge. NOTE 5: If DS-TT supports neighbor discovery, then TSN AF retrieves neighbor discovery information for DS-TT Ethernet ports from DS-TT. TSN AF indicates the neighbor discovery information for each discovered neighbor of DS-TT port to CNC. If DS-TT does not support neighbor discovery, then TSN AF retrieves neighbor discovery information for DS-TT Ethernet ports from NW-TT, using the User Plane Node Management Information Container (refer to Table K.1-2), the NW-TT performing neighbor discovery on behalf on DS-TT. NOTE 6: X = applicable; D = applicable when validation and generation of LLDP frames is processed at the DS-TT. NOTE 7: Void. NOTE 8: There is a Stream Filter Instance Table per Stream. NOTE 9: There is a Stream Gate Instance Table per Gate. NOTE 10: TSN AF indicates the support for PSFP to the CNC only if each DS-TT and NW-TT of the 5GS bridge has indicated support of PSFP. DS-TT indicates support of PSFP using port management capabilities, i.e. by indicating support for the Per-Stream Filtering and Policing information and by setting higher than zero values for MaxStreamFilterInstances, MaxStreamGateInstances, MaxFlowMeterInstances, SupportedListMax parameters. When available, TSN AF uses the PSFP information for determination of the traffic pattern information as described in Annex I. The PSFP information can be used at the DS-TT (if supported) and at the NW-TT (if supported) for the purpose of per-stream filtering and policing as defined in in section 8.6.5.2.1 of IEEE Std 802.1Q [98]. NOTE 11: TSN AF composes a Stream Parameter Table towards the CNC. It is up to TSN AF how it composes the Stream Parameter Table based on the numerical values as received from DS-TT and NW-TT port(s) and for the bridge for each individual parameter. NOTE 12: The set of Stream Identification Controlling Parameters depends on the Stream Identification type value as defined in IEEE Std 802.1CB [83] Table 9-1 and sections 9.1.2, 9.1.3, 9.1.4. NOTE 13: Enumeration of supported PTP instance types. Allowed values as defined in section 8.2.1.5.5 of IEEE Std 1588 [126]. NOTE 14: Enumeration of supported transport types. Allowed values: IPv4 (as defined in Annex C of IEEE Std 1588 [126]), IPv6 (as defined in IEEE Std 1588 [126] Annex D), Ethernet (as defined in Annex E of IEEE Std 1588 [126]). NOTE 15: Enumeration of supported PTP delay mechanisms. Allowed values as defined in section 8.2.15.4.4 of IEEE Std 1588 [126]. NOTE 16: Indicates whether DS-TT supports acting as a PTP grandmaster. NOTE 17: Indicates whether DS-TT supports acting as a gPTP grandmaster. NOTE 18: Enumeration of supported PTP profiles, each identified by PTP profile ID, as defined in section 20.3.3 of IEEE Std 1588 [126]. NOTE 19: PTP profile to apply, identified by PTP profile ID, as defined in section 20.3.3 of IEEE Std 1588 [126]. NOTE 20: Transport type to use. Allowed values: IPv4 (as defined in Annex C of IEEE Std 1588 [126]), IPv6 (as defined in IEEE Std 1588 [126] Annex D), Ethernet (as defined in Annex E of IEEE Std 1588 [126]). NOTE 21: Indicates whether to act as grandmaster or not, i.e. whether to send Announce, Sync and optionally Follow_Up messages. NOTE 22: The IEEE Std 802.1AS [104] data sets apply if the IEEE 802.1AS PTP profile is used; otherwise the IEEE Std 1588 [126] data sets apply. NOTE 23: Indicates how much the txPropagationDelay needs to change so that DS-TT/NW-TT report a change in txPropagationDelay to TSN AF. This is optional for NW-TT. NOTE 24: Indicates the gPTP domain (identified by a domain number) that is assumed by the CNC as the reference clock for time information in the scheduled traffic (gate control) information, PSFP information and bridge delay related information. This is optional for NW-TT. NOTE 25: PTP Instance ID uniquely identifies a PTP instance within the user plane node. NOTE 26: TSN AF indicates the neighbor discovery information for each discovered neighbor of NW-TT port to CNC. NOTE 27: Applicable in case of interworking with IETF Deterministic Networking.

Table K.1-2: Standardized user plane node management information

User plane node management information	Supported operations by TSN AF (1)	Supported operations by TSCTSF (1)	Reference
Information for 5GS Bridge/Router
User plane node Address	R	R
User plane node ID	R	R
NW-TT port numbers	R	R
Traffic forwarding information
Static Filtering Entry (3)	RW	–	IEEE Std 802.1Q [98] section 8.8.1
General Neighbor discovery configuration (2)
adminStatus	RW	–	IEEE 802.1AB [97] section 9.2.5.1
lldpV2LocChassisIdSubtype	RW	–	IEEE 802.1AB [97] Table 11-2
lldpV2LocChassisId	RW	–	IEEE 802.1AB [97] Table 11-2
lldpV2MessageTxInterval	RW	–	IEEE 802.1AB [97] Table 11-2
lldpV2MessageTxHoldMultiplier	RW	–	IEEE 802.1AB [97] Table 11-2
DS-TT port neighbor discovery configuration for DS-TT ports (4)
>>DS-TT port neighbor discovery configuration for each DS-TT port
>> DS-TT port number	RW	–
>> lldpV2LocPortIdSubtype	RW	–	IEEE 802.1AB [97] Table 11-2
>> lldpV2LocPortId	RW	–	IEEE 802.1AB [97] Table 11-2
Discovered neighbor information for DS-TT ports (4)
>Discovered neighbor information for each DS-TT port (4)
>> DS-TT port number	R	–
>> lldpV2RemChassisIdSubtype	R	–	IEEE 802.1AB [97] Table 11-2
>> lldpV2RemChassisId	R	–	IEEE 802.1AB [97] Table 11-2
>> lldpV2RemPortIdSubtype	R	–	IEEE 802.1AB [97] Table 11-2
>> lldpV2RemPortId	R	–	IEEE 802.1AB [97] Table 11-2
>> TTL	R	–	IEEE 802.1AB [97] section 8.5.4.1
Stream Parameters (5)
MaxStreamFilterInstances	R	–	IEEE Std 802.1Q [98] Table 12-34
MaxStreamGateInstances	R	–	IEEE Std 802.1Q [98] Table 12-34
MaxFlowMeterInstances	R	–	IEEE Std 802.1Q [98] Table 12-34
SupportedListMax	R	–	IEEE Std 802.1Q [98] Table 12-34
Time synchronization information
Supported PTP instance types (6)	R	R
Supported transport types (7)	R	R
Supported delay mechanisms (8)	R	R
PTP grandmaster capable (9)	R	R
gPTP grandmaster capable (10)	R	R
Supported PTP profiles (11)	R	R
Number of supported PTP instances	R	R
Time synchronization information for PTP instances (16)
> PTP instance specification
>> PTP Instance ID (17)	RW	RW
>> PTP profile (12)	RW	RW
>> Transport type (13)	RW	RW
>> Grandmaster candidate enabled (14)	RW	RW
IEEE Std 1588 [126] data sets (15)
>> defaultDS.clockIdentity	RW	RW	IEEE Std 1588 [126] section 8.2.1.2.2
>> defaultDS.clockQuality.clockClass	RW	RW	IEEE Std 1588 [126] section 8.2.1.3.1.2
>> defaultDS.clockQuality.clockAccuracy	RW	RW	IEEE Std 1588 [126] section 8.2.1.3.1.3
>> defaultDS.clockQuality.offsetScaledLogVariance	RW	RW	IEEE Std 1588 [126] section 8.2.1.3.1.4
>> defaultDS.priority1	RW	RW	IEEE Std 1588 [126] section 8.2.1.4.1
>> defaultDS.priority2	RW	RW	IEEE Std 1588 [126] section 8.2.1.4.2
>> defaultDS.domainNumber	RW	RW	IEEE Std 1588 [126] section 8.2.1.4.3
>> defaultDS.sdoId	RW	RW	IEEE Std 1588 [126] section 8.2.1.4.5
>> defaultDS.instanceEnable	RW	RW	IEEE Std 1588 [126] section 8.2.1.5.2
>> defaultDS.externalPortConfigurationEnabled	RW	RW	IEEE Std 1588 [126] section 8.2.1.5.3
>> defaultDS.instanceType	RW	RW	IEEE Std 1588 [126] section 8.2.1.5.5
>> timePropertiesDS.currentUtcOffset	RW	RW	IEEE Std 1588 [126] section 8.2.4.2
>> timePropertiesDS.timeSource	RW	RW	IEEE Std 1588 [126] section 8.2.4.9
IEEE Std 802.1AS [104] data sets (15)
>> defaultDS.clockIdentity	RW	RW	IEEE Std 802.1AS [104] section 14.2.2
>> defaultDS.clockQuality.clockClass	RW	RW	IEEE Std 802.1AS [104] section 14.2.4.2
>> defaultDS.clockQuality.clockAccuracy	RW	RW	IEEE Std 802.1AS [104] section 14.2.4.3
>> defaultDS.clockQuality.offsetScaledLogVariance	RW	RW	IEEE Std 802.1AS [104] section 14.2.4.4
>> defaultDS.priority1	RW	RW	IEEE Std 802.1AS [104] section 14.2.5
>> defaultDS.priority2	RW	RW	IEEE Std 802.1AS [104] section 14.2.6
>> defaultDS.timeSource	RW	RW	IEEE Std 802.1AS [104] section 14.2.15
>> defaultDS.domainNumber	RW	RW	IEEE Std 802.1AS [104] section 14.2.16
>> defaultDS.sdoId	RW	RW	IEEE Std 802.1AS [104] section 14.2.18
>> defaultDS.sdoId	RW	RW	IEEE Std 802.1AS [104] section 14.2.18
>> defaultDS.externalPortConfigurationEnabled	RW	RW	IEEE Std 802.1AS [104] section 14.2.4.3
>> defaultDS.instanceEnable	RW	RW	IEEE Std 802.1AS [104] section 14.2.19
>> timePropertiesDS.currentUtcOffset	RW	RW	IEEE Std 802.1AS [104] section 14.5.2
Time synchronization information for DS-TT ports
> Time synchronization information for each DS-TT port
> DS-TT port number	RW	RW
>> Time synchronization information for each PTP Instance
>> PTP Instance ID (17)	RW	RW
>> Grandmaster on behalf of DS-TT enabled (14)	RW	RW
IEEE Std 1588 [126] data sets (15)
>> portDS.portIdentity	RW	RW	IEEE Std 1588 [126] section 8.2.15.2.1
>> portDS.portState	R	R	IEEE Std 1588 [126] section 8.2.15.3.1
>> portDS.logMinDelayReqInterval	RW	RW	IEEE Std 1588 [126] section 8.2.15.3.2
>> portDS.logAnnounceInterval	RW	RW	IEEE Std 1588 [126] section 8.2.15.4.1
>> portDS.announceReceiptTimeout	RW	RW	IEEE Std 1588 [126] section 8.2.15.4.2
>> portDS.logSyncInterval	RW	RW	IEEE Std 1588 [126] section 8.2.15.4.3
>> portDS.delayMechanism	RW	RW	IEEE Std 1588 [126] section 8.2.15.4.4
>> portDS.logMinPdelayReqInterval	RW	RW	IEEE Std 1588 [126] section 8.2.15.4.5
>> portDS.versionNumber	RW	RW	IEEE Std 1588 [126] section 8.2.15.4.6
>> portDS.minorVersionNumber	RW	RW	IEEE Std 1588 [126] section 8.2.15.4.7
>> portDS.delayAsymmetry	RW	RW	IEEE Std 1588 [126] section 8.2.15.4.8
>> portDS.portEnable	RW	RW	IEEE Std 1588 [126] section 8.2.15.5.1
>> externalPortConfigurationPortDS.desiredState	RW	RW	IEEE Std 1588 [126] section 15.5.3.7.15.1
IEEE Std 802.1AS [104] data sets (15)
>> portDS.portIdentity	RW	RW	IEEE Std 802.1AS [104] section 14.8.2
>> portDS.portState	R	R	IEEE Std 802.1AS [104] section 14.8.3
>> portDS.ptpPortEnabled	RW	RW	IEEE Std 802.1AS [104] section 14.8.4
>> portDS.delayMechanism	RW	RW	IEEE Std 802.1AS [104] section 14.8.5
>> portDS.isMeasuringDelay	R	R	IEEE Std 802.1AS [104] section 14.8.6
>> portDS.asCapable	R	R	IEEE Std 802.1AS [104] section 14.8.7
>> portDS.meanLinkDelay	R	R	IEEE Std 802.1AS [104] section 14.8.8
>> portDS.meanLinkDelayThresh	RW	RW	IEEE Std 802.1AS [104] section 14.8.9
>> portDS.delayAsymetry	RW	RW	IEEE Std 802.1AS [104] section 14.8.10
>> portDS.neighborRateRatio	R	R	IEEE Std 802.1AS [104] section 14.8.11
>> portDS.initialLogAnnounceInterval	RW	RW	IEEE Std 802.1AS [104] section 14.8.12
>> portDS.currentLogAnnounceInterval	R	R	IEEE Std 802.1AS [104] section 14.8.13
>> portDS.useMgtSettableLogAnnounceInterval	RW	RW	IEEE Std 802.1AS [104] section 14.8.14
>> portDS.mgtSettableLogAnnounceInterval	RW	RW	IEEE Std 802.1AS [104] section 14.8.15
>> portDS.announceReceiptTimeout	RW	RW	IEEE Std 802.1AS [104] section 14.8.16
>> portDS.initialLogSyncInterval	RW	RW	IEEE Std 802.1AS [104] section 14.8.17
>> portDS.currentLogSyncInterval	R	R	IEEE Std 802.1AS [104] section 14.8.18
>> portDS.useMgtSettableLogSyncInterval	RW	RW	IEEE Std 802.1AS [104] section 14.8.19
>> portDS.mgtSettableLogSyncInterval	RW	RW	IEEE Std 802.1AS [104] section 14.8.20
>> portDS.syncReceiptTimeout	RW	RW	IEEE Std 802.1AS [104] section 14.8.21
>> portDS.syncReceiptTimeoutTimeInterval	RW	RW	IEEE Std 802.1AS [104] section 14.8.22
>> portDS.initialLogPdelayReqInterval	RW	RW	IEEE Std 802.1AS [104] section 14.8.23
>> portDS.currentLogPdelayReqInterval	R	R	IEEE Std 802.1AS [104] section 14.8.24
>> portDS.useMgtSettableLogPdelayReqInterval	RW	RW	IEEE Std 802.1AS [104] section 14.8.25
>> portDS.mgtSettableLogPdelayReqInterval	RW	RW	IEEE Std 802.1AS [104] section 14.8.26
>> portDS.initialLogGptpCapableMessageInterval	RW	RW	IEEE Std 802.1AS [104] section 14.8.27
>> portDS.currentLogGptpCapableMessageInterval	R	R	IEEE Std 802.1AS [104] section 14.8.28
>> portDS.useMgtSettableLogGptpCapableMessageInterval	RW	RW	IEEE Std 802.1AS [104] section 14.8.29
>> portDS.mgtSettableLogGptpCapableMessageInterval	RW	RW	IEEE Std 802.1AS [104] section 14.8.30
>> portDS.initialComputeNeighborRateRatio	RW	RW	IEEE Std 802.1AS [104] section 14.8.31
>> portDS.currentComputeNeighborRateRatio	R	R	IEEE Std 802.1AS [104] section 14.8.32
>> portDS.useMgtSettableComputeNeighborRateRatio	RW	RW	IEEE Std 802.1AS [104] section 14.8.33
>> portDS.mgtSettableComputeNeighborRateRatio	RW	RW	IEEE Std 802.1AS [104] section 14.8.34
>> portDS.initialComputeMeanLinkDelay	RW	RW	IEEE Std 802.1AS [104] section 14.8.35
>> portDS.currentComputeMeanLinkDelay	R	R	IEEE Std 802.1AS [104] section 14.8.36
>> portDS.useMgtSettableComputeMeanLinkDelay	RW	RW	IEEE Std 802.1AS [104] section 14.8.37
>> portDS.mgtSettableComputeMeanLinkDelay	RW	RW	IEEE Std 802.1AS [104] section 14.8.38
>> portDS.allowedLostResponses	RW	RW	IEEE Std 802.1AS [104] section 14.8.39
>> portDS.allowedFaults	RW	RW	IEEE Std 802.1AS [104] section 14.8.40
>> portDS.gPtpCapableReceiptTimeout	RW	RW	IEEE Std 802.1AS [104] section 14.8.41
>> portDS.versionNumber	RW	RW	IEEE Std 802.1AS [104] section 14.8.42
>> portDS.nup	RW	RW	IEEE Std 802.1AS [104] section 14.8.43
>> portDS.ndown	RW	RW	IEEE Std 802.1AS [104] section 14.8.44
>> portDS.oneStepTxOper	R	R	IEEE Std 802.1AS [104] section 14.8.45
>> portDS.oneStepReceive	R	R	IEEE Std 802.1AS [104] section 14.8.46
>> portDS.oneStepTransmit	R	R	IEEE Std 802.1AS [104] section 14.8.47
>> portDS.initialOneStepTxOper	RW	RW	IEEE Std 802.1AS [104] section 14.8.48
>> portDS.currentOneStepTxOper	RW	RW	IEEE Std 802.1AS [104] section 14.8.49
>> portDS.useMgtSettableOneStepTxOper	RW	RW	IEEE Std 802.1AS [104] section 14.8.50
>> portDS.mgtSettableOneStepTxOper	RW	RW	IEEE Std 802.1AS [104] section 14.8.51
>> portDS.syncLocked	R	R	IEEE Std 802.1AS [104] section 14.8.52
>> portDS.pdelayTruncatedTimestampsArray	RW	RW	IEEE Std 802.1AS [104] section 14.8.53
>> portDS.minorVersionNumber	RW	RW	IEEE Std 802.1AS [104] section 14.8.54
>> externalPortConfigurationPortDS.desiredState	RW	RW	IEEE Std 802.1AS [104] section 14.12.2
Time synchronization status (TSS) information
> Synchronization state	-	R	Table 5.27.1.12-1
> Clock quality	-	R	Table 5.27.1.12-1
>> Traceable to UTC	-	R	Table 5.27.1.12-1
>> Traceable to GNSS	-	R	Table 5.27.1.12-1
>> Frequency stability	-	R	Table 5.27.1.12-1
>> Clock accuracy	-	R	Table 5.27.1.12-1
> Parent time source	-	R	Table 5.27.1.12-1
NOTE 1: R = Read only access; RW = Read/Write access; – = not supported. NOTE 2: General neighbor discovery information is included only when NW-TT performs neighbor discovery on behalf of DS-TT. When a parameter in this group is changed, it is necessary to provide the change to every DS-TT and the NW-TT that belongs to the 5GS TSN bridge. NOTE 3: AdminCycleTime, AdminControlListLength and TransmissionOverrun are optional for gate control information. NOTE 4: DS-TT discovery configuration and DS-TT discovery information are used only when DS-TT does not support LLDP and NW-TT performs neighbor discovery on behalf of DS-TT. TSN AF indicates the discovered neighbor information for each DS-TT port to CNC. NOTE 5: TSN AF indicates the support for PSFP to the CNC only if each DS-TT and NW-TT of the 5GS bridge have indicated support of PSFP. The support of PSFP at the NW-TT ports is expressed by setting higher than zero values for MaxStreamFilterInstances, MaxStreamGateInstances, MaxFlowMeterInstances, SupportedListMax parameters. NOTE 6: Enumeration of supported PTP instance types. Allowed values as defined in section 8.2.1.5.5 of IEEE Std 1588 [126]. NOTE 7: Enumeration of supported transport types. Allowed values: IPv4 (as defined in IEEE Std 1588 [126] Annex C), IPv6 (as defined in IEEE Std 1588 [126] Annex D), Ethernet (as defined in Annex E of IEEE Std 1588 [126]). NOTE 8: Enumeration of supported PTP delay mechanisms. Allowed values as defined in section 8.2.15.4.4 of IEEE Std 1588 [126]. NOTE 9: Indicates whether NW-TT supports acting as a PTP grandmaster. NOTE 10: Indicates whether NW-TT supports acting as a gPTP grandmaster. NOTE 11: Enumeration of supported PTP profiles, each identified by PTP profile ID, as defined in section 20.3.3 of IEEE Std 1588 [126]. NOTE 12: PTP profile to apply, identified by PTP profile ID, as defined in section 20.3.3 of IEEE Std 1588 [126]. NOTE 13: Transport type to use. Allowed values: IPv4 (as defined in Annex C of IEEE Std 1588 [126]), IPv6 (as defined in IEEE Std 1588 [126] Annex D), Ethernet (as defined in Annex E of IEEE Std 1588 [126]). NOTE 14: Indicates whether to act as grandmaster on behalf of a DS-TT port or not if 5GS is determined to be the grandmaster clock, i.e. whether to send Announce, Sync and optionally Follow_Up messages on behalf of DS-TT. NOTE 15: The IEEE Std 802.1AS [104] data sets apply if the IEEE 802.1AS PTP profile is used; otherwise, the IEEE Std 1588 [126] data sets apply. NOTE 16: Specifies the default data set for each PTP instance identified by PTP instance ID within the user plane node. NOTE 17: PTP Instance ID uniquely identifies a PTP instance within the user plane node.

K.2 Port and user plane node management information exchange for time synchronization p. 651

K.2.1 Capability exchange p. 651

DS-TT and NW-TT indicate time synchronization information they support inside the Port management capabilities (see Table K.1-1).

TSN AF and TSCTSF may determine the PTP functionalities supported by DS-TT and NW-TT by retrieving the following port management information or user plane node management information, respectively:

Supported PTP instance types;
Supported transport types;
Supported PTP delay mechanisms;
Grandmaster capability;
Supported PTP profiles;
Number of supported PTP instances.

If DS-TT and NW-TT support the PTP Relay instance type as defined by IEEE 802.1AS [104] then DS-TT and NW-TT shall include the IEEE 802.1AS [104] PTP profile in the "Supported PTP profiles" in PMIC and UMIC, respectively.

The TSN AF or TSCTSF may retrieve the "Number of supported PTP instances" from NW-TT via UMIC and from DS-TT via PMIC.

K.2.2 PTP Instance configuration p. 652

K.2.2.1 General p. 652

Based on input received from external applications (CNC in case of TSN AF or any AF in case of TSCTSF), TSN AF or TSCTSF may configure PTP instances (identified by PTP Instance ID) in a DS-TT or NW-TT by sending port management information (PMIC, see Table K.1-1) and user plane node management information (UMIC, see Table K.1-2) to DS-TT or NW-TT as described below:

use PMIC "PTP instance specification" for configuring DS-TT(s) for PTP instance data sets common for all PTP ports (i.e. defaultDS and TimePropertiesDS), and PTP instance data sets specific for each PTP port (i.e. portDS data set);
use UMIC "PTP instance specification" for configuring NW-TT for PTP instance data sets common for all PTP ports;
use PMIC "PTP instance specification" for configuring NW-TT for PTP instance data sets specific for each PTP port;
use UMIC "Time synchronization information for DS-TT ports" for configuring NW-TT for PTP instance data sets specific for each PTP port for the PTP ports in DS-TT(s).

TSN AF or TSCTSF may also configure PTP instances for DS-TT ports in NW-TT by sending UMIC (see Table K.1-2) to NW-TT to enable NW-TT to operate as a grandmaster on behalf of DS-TT (see clause K.2.2.4 for more details).

For each PTP instance the TSN AF or TSCTSF may provide individual PTP configuration parameters or may provide a PTP profile ID to DS-TT or NW-TT. The DS-TT and NW-TT use the default values as defined in the corresponding PTP Profile, if individual PTP configuration parameters that are covered by the PTP profile are not provided.

To configure DS-TT and NW-TT to operate as a PTP relay instance, TSN AF or TSCTSF shall set the PTP profile (see Table K.1-1) to IEEE Std 802.1AS [104].

DS-TT may operate as a PTP relay instance with the gPTP GM connected on N6 until the first PTP instance is configured in the DS-TT by TSN AF or TSCTSF.

To initialize a PTP instance in 5GS, TSN AF or TSCTSF creates a new PTP instance in NW-TT by assigning a new PTP Instance ID and indicating it to the NW-TT in "PTP instance specification" in UMIC and PMIC(s) for each NW-TT port that is part of the PTP instance. TSN AF or TSCTSF then retrieves the "defaultDS.clockIdentity" of the PTP instance in NW-TT via UMIC. NW-TT ensures that the clockIdentity in defaultDS in UMIC matches with the clockIdentity in the portDS.portIdentity in PMIC(s) for a particular PTP Instance ID.

To add a DS-TT port into an existent PTP instance in 5GS, the TSN AF or TSCTSF indicates the PTP Instance ID (to which the DS-TT port is being added) to the DS-TT in "PTP instance specification" in PMIC, and indicating the PTP Instance ID to the NW-TT in "Time synchronization information for DS-TT ports" in UMIC for the corresponding DS-TT port.

For a particular PTP instance in NW-TT, the same PTP Instance ID shall be used in "PTP instance specification" in PMIC, in "PTP instance specification" in UMIC, and in "Time synchronization information for DS-TT ports" in UMIC.

The TSN AF or TSCTSF then initializes the PTP instance in the DS-TT by setting the applicable PTP instance data sets common for all PTP ports (i.e. defaultDS and TimePropertiesDS), (including"defaultDS.clockIdentity") via "PTP instance specification" in PMIC to the same value as retrieved from the NW-TT via "PTP instance specification" in UMIC. The TSN AF or TSCTSF also enables the PTP instance by setting the defaultDS.instanceEnable = TRUE to DS-TT via PMIC and to NW-TT via UMIC (if applicable). The TSN AF or TSCTSF can initialize any number of PTP instances:

among the DS-TT(s) and NW-TT that are part of the same set of PTP instances in 5GS; up to the maximum number of supported PTP instances by the NW-TT or DS-TT that supports the lowest number of supported PTP instances; and
in the NW-TT; up to the maximum number of supported PTP instances by the NW-TT.

To remove a DS-TT port from a PTP instance in 5GS, the TSN AF or TSCTSF deletes the PTP instance in DS-TT using PMIC and in NW-TT using UMIC as specified in TS 24.539. To remove a NW-TT port from a PTP instance in 5GS, the TSN AF or TSCTSF deletes the PTP instance in NW-TT using PMIC as specified in TS 24.539. If a PTP instance in 5GS is no more needed the TSN AF or TSCTSF may delete the PTP instance in NW-TT using UMIC as specified in TS 24.539.

K.2.2.2 Configuration for Sync and Announce reception timeouts p. 653

The NW-TT shall be able to determine the timeout of the reception of (g)PTP Announce (when the 5GS operates as a time-aware system or Boundary Clock) and gPTP Sync messages (when the 5GS operates as time-aware system). To enable this, the TSCTSF or TSN AF shall configure the NW-TT for the following information via PMIC for each PTP port in NW-TT and "Time synchronization information for each DS-TT port" element in UMIC for each PTP port in DS-TT:

portDS.announceReceiptTimeout (for time-aware system and Boundary Clock);
portDS.syncReceiptTimeout (for time-aware system);
portDS.logAnnounceInterval (for Boundary Clock);
portDS.initialLogAnnounceInterval, portDS.useMgtSettableLogAnnounceInterval, and
portDS.mgtSettableLogAnnounceInterval (for time-aware system).

K.2.2.3 Configuration for PTP port states p. 653

The PTP port states may be determined by NW-TT either via:

Method a), BMCA procedure.
Method b), local configuration.

When Method b) is used, the TSN AF or TSCTSF sets the defaultDS.externalPortConfigurationEnabled (per PTP instance) in UMIC to TRUE, and sets the value of externalPortConfigurationPortDS.desiredState (per PTP port) in UMIC for each DS-TT port and in PMIC for each NW-TT port for the (g)PTP domain.

K.2.2.4 Configuration for PTP grandmaster function p. 654

The following options may be supported (per DS-TT) for the 5GS to generate the Sync, Follow_Up and Announce messages for the Leader ports on the DS-TT:

NW-TT generates the Sync, Follow_Up and Announce messages on behalf of DS-TT (e.g. if DS-TT does not support this).
DS-TT generates the Sync, Follow_Up and Announce messages in this DS-TT.

TSN AF and TSCTSF may use the elements in port and user plane node management information container to determine the PTP grandmaster functionality supported by DS-TT and NW-TT and may configure the DS-TT and NW-TT ports to operate as in option a) or b) as follows:

The "PTP grandmaster capable" element and the "gPTP grandmaster capable" element in PMIC are used to indicate the support for PTP or gPTP grandmaster capability, respectively, in each DS-TT. If the TSN AF or TSCTSF determines the DS-TT supports grandmaster capability (PTP or gPTP grandmaster capable is TRUE), then either option a) or b) can be used for the PTP instance(s) in the DS-TT. Otherwise, only option a) can be used for the PTP instance(s) in the DS-TT.
To enable option a) for PTP ports in DS-TT, the TSN AF or TSCTSF sets the element "Grandmaster on behalf of DS-TT enabled" TRUE (per PTP instance per DS-TT) in UMIC for the respective DS-TT port, and the TSN AF or TSCTSF sets the element "Grandmaster enabled" FALSE (per PTP instance per DS-TT) in PMIC to the respective DS-TT port.
To enable option b) for PTP ports in DS-TT, the TSN AF or TSCTSF sets the element "Grandmaster on behalf of DS-TT enabled" FALSE in UMIC (per PTP instance per DS-TT) for the respective port, and the TSN AF or TSCTSF sets the element "Grandmaster enabled" TRUE (per PTP instance per DS-TT) in PMIC to the respective DS-TT port.
To enable either option a) or option b) for a PTP instance, the TSN AF or TSCTSF sets the element "Grandmaster candidate enabled" TRUE (per PTP instance) in UMIC.
When option b) is used for one or more PTP ports in DS-TT(s), the TSN AF or TSCTSF shall use the elements in defaultDS in PMIC for the respective DS-TT(s) and in UMIC for NW-TT to ensure that all PTP ports in the DS-TT(s) and NW-TT in particular PTP instance are distributing the same values of grandmasterPriority1, grandmasterClockQuality, grandmasterPriority2, grandmasterIdentity, and timeSource message fields in Announce messages.

K.2.2.5 Configuration for Sync and Announce intervals p. 654

The TSN AF or TSCTSF uses the values in portDS.logSyncInterval (for Boundary Clock) or portDS.initialLogSyncInterval, portDS.useMgtSettableLogSyncInterval and portDS.mgtSettableLogSyncInterval (for time-aware system) to configure the interval for the Sync messages (per PTP port) as described in IEEE Std 1588 [126] or IEEE Std 802.1AS [104], respectively. The TSCTSF or TSN AF configures those values as follows:

TSCTSF or TSN AF use PMIC to configure the values for the PTP ports in NW-TT.
TSCTSF or TSN AF use the "Time synchronization information for each DS-TT port" element in UMIC to configure the values for PTP ports in DS-TT(s) if NW-TT acts as GM on behalf of those DS-TTs.
TSCTSF or TSN AF use PMIC to configure the values for the PTP ports in DS-TT if the DS-TT is capable of acting as a GM.

When the NW-TT generates the (g)PTP Sync messages on behalf of the DS-TT, the NW-TT uses the values in the element "Time synchronization information for each DS-TT port" in UMIC to determine the Sync interval for the PTP ports the respective DS-TT. When DS-TT generates the (g)PTP Sync messages, the DS-TT uses the values in PMIC to determine the Sync interval for the PTP ports in this DS-TT.

The TSN AF or TSCTSF uses the values in portDS.logAnnounceInterval (for Boundary Clock) or portDS.initialLogAnnounceInterval, portDS.useMgtSettableLogAnnounceInterval and portDS.mgtSettableLogAnnounceInterval (for time-aware system) to configure the interval for the Announce messages (per PTP port) as described in IEEE Std 1588 [126] and IEEE Std 802.1AS [104], respectively. The TSCTSF or TSN AF configures those values as follows:

TSCTSF or TSN AF use PMIC to configure the values for the PTP ports in NW-TT.
TSCTSF or TSN AF use the "Time synchronization information for each DS-TT port" element in UMIC to configure the values for PTP ports in DS-TT(s) if NW-TT acts as GM on behalf of those DS-TTs.
TSCTSF or TSN AF use PMIC to configure the values for the PTP ports in DS-TT if the DS-TT is capable of acting as a GM.

When the NW-TT generates the (g)PTP Announce messages on behalf of the DS-TT, the NW-TT uses the values in the element "Time synchronization information for each DS-TT port" in UMIC to determine the Announce interval for the PTP ports the respective DS-TT. When DS-TT generates the (g)PTP Announce messages, the DS-TT uses the values in PMIC to determine the Announce interval for the PTP ports in this DS-TT.

K.2.2.6 Configuration for transport protocols p. 655

The procedure described in this clause is applicable when the PTP Profile that is used for the PTP instance in 5GS defines multiple permitted transport protocols.

TSN AF or TSCTSF may use the element "Supported transport types" in port management information container (per DS-TT) to determine the supported transport types in the DS-TT. TSN AF or TSCTSF may use the element "Supported transport types" in UMIC (per NW-TT) to determine the supported transport types in the NW-TT.

The TSN AF or TSCTSF may use the element "Transport type" (per PTP instance) in PMIC to configure the transport protocol in use for the PTP instance in DS-TT. The TSN AF or TSCTSF may use the element "Transport type" (per PTP instance) in UMIC to configure the transport protocol in use for the PTP instance in NW-TT.

The PTP instance shall be configured to use one of the following transport protocols:

Ethernet as described in Annex E of IEEE Std 1588 [126]. The Ethertype as defined for PTP shall be used. The related Ethernet frames carry the PTP multicast Ethernet destination MAC address.
UDP over IPv4 as described in Annex C of IEEE Std 1588 [126],
UDP over IPv6 as described in Annex D of IEEE Std 1588 [126].

Option 1 applies to Ethernet PDU Session type. Options 2 and 3 apply to IP PDU Session type or Ethernet PDU Session type with IP payload.

L (Normative) Support of GERAN/UTRAN access |R17| p. 656

This Annex applies when the SMF+PGW-C is enhanced to support UE accessing the network via GERAN/UTRAN over Gn/Gp interface. For this scenario, the SMF+PGW-C uses N7 interface to interact with PCF and the N40 interface to interact with CHF.

SMF+PGW-C selection by SGSN is specified in Annex G of TS 23.502.

The SMF+PGW-C interacting with PCF for GERAN/UTRAN access is specified in Annex G of TS 23.502.

The functional description for SMF+PGW-C interacting with PCF to support GERAN/UTRAN access is specified in TS 23.503.

The charging services on SMF+PGW-C interactions with CHF for GERAN/UTRAN access are specified in TS 32.255.