IEEE 802.1ASdr-2024

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IEEE Standard for Local and Metropolitan Area Networks–Timing and Synchronization for Time‐Sensitive Applications Amendment 1: Inclusive Terminology (Published)

Published By	Publication Date	Number of Pages
IEEE	2024	222

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Description

Amendment Standard – Active. This amendment to IEEE Std 802.1AS™-2020 replaces terminology with alternative terminology identified by IEEE Std 1588g™-2022. All changes made in figures are only to replace terminology.

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PDF Pages	PDF Title
1	IEEE Std 802.1ASdr-2024 Front Cover
2	Title page
4	Important Notices and Disclaimers Concerning IEEE Standards Documents
8	Participants
10	Introduction
11	Contents
14	List of figures
15	List of tables
17	4. Acronyms and abbreviations
18	5. Conformance 5.4 PTP Instance requirements and options 5.4.1 Summary of requirements 5.4.2 PTP Instance options
19	5.4.3 PTP Relay Instance requirements 5.6 MAC-specific timing and synchronization methods for IEEE Std 802.11-2016
20	7. Time-synchronization model for a packet network 7.2 Architecture of a time-aware network 7.2.2 Time-aware network consisting of a single gPTP domain 7.2.3 Time-aware network consisting of multiple gPTP domains 7.2.4 Time-aware networks with redundant Grandmaster PTP Instances and/or redundant paths
21	7.3 Time synchronization 7.3.4 Grandmaster PTP Instance (best mastertimeTransmitter) selection and network establishment
22	7.4 PTP Instance architecture
23	7.5 Differences between gPTP (IEEE Std 802.1AS) and PTP (IEEE Std 1588-2019)
24	8. IEEE 802.1AS concepts and terminology 8.4 Messages 8.4.3 Generation of event message timestamps 8.5 Ports 8.5.2 Port identity 8.6 PTP Instance characterization 8.6.1 PTP Instance type 8.6.2 PTP Instance attributes
27	9. Application interfaces 9.1 Overview of the interfaces 9.2 ClockSourceTime interface 9.2.1 General 9.3 ClockTargetEventCapture interface 9.3.1 General
28	9.3.2 ClockTargetEventCapture.invoke parameters 9.3.3 ClockTargetEventCapture.result parameters 9.4 ClockTargetTriggerGenerate interface 9.4.1 General
29	9.4.2 ClockTargetTriggerGenerate.invoke parameters 9.4.3 ClockTargetTriggerGenerate.result parameters 9.4.4 ClockTargetTriggerGenerate interface definition
30	9.5 ClockTargetClockGenerator interface 9.5.1 General 9.5.2 ClockTargetClockGenerator.invoke parameters 9.5.3 ClockTargetClockGenerator.result parameters
31	9.6 ClockTargetPhaseDiscontinuity interface 9.6.1 General 9.6.2 ClockTargetPhaseDiscontinuity.result parameters
32	10. Media-independent layer specification 10.1 Overview 10.1.2 Model of operation
34	10.1.3 Grandmaster-capable PTP Instance 10.2 Time-synchronization state machines 10.2.1 Overview
37	10.2.2 Data structures communicated between state machines
41	10.2.3 Overview of global variables used by time synchronization state machines
43	10.2.4 Per PTP Instance global variables
44	10.2.5 Per-port global variables 10.2.7 SiteSyncSync state machine
46	10.2.8 PortSyncSyncReceive state machine 10.2.9 ClockMasterSyncSendClockTimeTransmitterSyncSend state machine
48	10.2.10 ClockMasterSyncOffsetClockTimeTransmitterSyncOffset state machine
50	10.2.11 ClockMasterSyncReceiveClockTimeTransmitterSyncReceive state machine
52	10.2.12 PortSyncSyncSend state machine
54	10.2.13 ClockSlaveClockTimeReceiverSync state machine
55	10.3 Best mastertimeTransmitter clock selection, external port configuration, and announce interval setting state machines 10.3.1 Best mastertimeTransmitter clock selection and external port configuration overview
58	10.3.2 systemIdentity
59	10.3.3 stepsRemoved 10.3.4 time-synchronization spanning tree priority vectors
60	10.3.5 Priority vector calculations
62	10.3.6 PTP Port state assignments
63	10.3.7 Overview of best mastertimeTransmitter clock selection, external port configuration, and announce interval setting state machines
66	10.3.8 Overview of global variables used by best mastertimeTransmitter clock selection, external port configuration, and announce interval setting state machines
68	10.3.9 Per PTP Instance global variables
72	10.3.10 Per-port global variables
74	10.3.12 PortAnnounceInformation state machine
77	10.3.13 PortStateSelection state machine
79	10.3.14 PortAnnounceInformationExt state machine 10.3.15 PortStateSettingExt state machine
81	10.3.16 PortAnnounceTransmit state machine
83	10.5 Message attributes 10.5.2 Message class 10.6 Message formats 10.6.1 General
84	10.6.2 Header
85	10.6.3 Announce message 10.7 Protocol timing characterization 10.7.2 Message transmission intervals 10.7.3 Timeouts
87	11. Media-dependent layer specification for full-duplex point-to-point links 11.1 Overview 11.1.3 Transport of time-synchronization information
88	11.1.4 Model of operation 11.2 State machines for MD entity specific to full-duplex point-to-point links 11.2.5 Use of link aggregation
89	11.3 Message attributes 11.3.2 Message types contained in each message class 11.4 Message formats 11.4.3 Sync message 11.4.4 Follow_Up message
91	12. Media-dependent layer specification for IEEE 802.11 links 12.1 Overview 12.1.1 General 12.1.2 IEEE 802.11 Timing Measurement and Fine Timing Measurement procedures
94	12.1.3 Layering for IEEE 802.11 links
96	12.4 Determination of asCapable 12.5 State machines 12.5.1 Media-dependent mastertimeTransmitter state machines
102	12.5.2 Media-dependent slavetimeReceiver state machine
107	12.6 FTM parameters
108	12.7 Format of VendorSpecific information element
109	12.8 Synchronization message interval 12.8.2 Synchronization message interval default value
110	13. Media-dependent layer specification for interface to IEEE 802.3 Ethernet passive optical network link 13.1 Overview 13.1.1 General 13.1.2 Description of the EPON timing process 13.1.3 Best mastertimeTransmitter selection
113	13.1.4 Time synchronization in EPON
114	13.3 Message format 13.3.1 TIMESYNC message
115	13.5 Layering for IEEE 802.3 EPON links 13.6 Service interface definitions 13.6.1 OSSPDU.request
116	13.6.2 OSSPDU.indication 13.7 MD entity global variables 13.8 State machines 13.8.1 Requester state machine
118	14. Timing and synchronization management 14.1 General 14.1.1 Data set hierarchy 14.1.2 Data set descriptions
119	14.2 Default Parameter Data Set (defaultDS) 14.2.8 currentUtcOffset 14.2.9 currentUtcOffsetValid 14.2.10 leap59 14.2.11 leap61 14.2.12 timeTraceable
120	14.2.13 frequencyTraceable 14.2.14 ptpTimescale 14.3 Current Parameter Data Set (currentDS) 14.3.3 offsetFromMasterTimeTransmitter 14.3.7 gmChangeCount 14.3.8 timeOfLastGmChangeEvent 14.3.9 timeOfLastGmPhaseChangeEvent
121	14.3.10 timeOfLastGmFreqChangeEvent 14.3.11 currentDS table
122	14.4 Parent Parameter Data Set (parentDS) 14.4.2 parentPortIdentity 14.7 Acceptable MasterTimeTransmitter Table Parameter Data Set (acceptableMasterTimeTransmitterTableDS) 14.7.1 General 14.7.2 maxTableSize 14.7.3 actualTableSize 14.7.4 acceptableMasterTimeTransmitterArray
123	14.7.5 acceptableMasterTimeTransmitterTableDS table 14.8 Port Parameter Data Set (portDS) 14.8.3 portState 14.8.8 meanLinkDelay
124	14.8.16 announceReceiptTimeout 14.8.21 syncReceiptTimeout 14.10 Port Parameter Statistics Data Set (portStatisticsDS) 14.10.13 txSyncCount 14.11 Acceptable MasterTimeTransmitter Port Parameter Data Set (acceptableMasterTimeTransmitterPortDS) 14.11.1 General
125	14.11.2 acceptableMasterTimeTransmitterTableEnabled 14.11.3 acceptableMasterTimeTransmitterPortDS table 14.16 Common Mean Link Delay Service Link Port Parameter Data Set (cmldsLinkPortDS) 14.16.6 meanLinkDelay
126	15. Managed object definitions 15.2 Structure of the MIB
133	15.3 Relationship to MIB in IEEE Std 802.1AS-2011
134	15.4 Security considerations 15.5 Textual conventions defined in this MIB
135	15.6 IEEE 802.1AS MIB module,
206	16. Media-dependent layer specification for CSN 16.1 Overview 16.5 Synchronization messages 16.5.3 Synchronization message propagation on a CSN with network reference clock 16.6 Specific CSN requirements 16.6.2 MoCA-specific behavior
207	Annex A (normative) Protocol Implementation Conformance Statement (PICS) proforma A.5 Major capabilities
208	A.7 Minimal time-aware system
210	A.9 Best mastertimeTransmitter clock
212	A.10 Grandmaster-capable PTP Instance
213	A.11 Media-independent mastertimeTransmitter
214	A.13 Media-dependent, full-duplex point-to-point link
217	A.14 Media-dependent IEEE 802.11 link
218	A.15 Media-dependent IEEE 802.3 EPON link A.16 Media-dependent CSN link
219	Annex F (informative) PTP profile included in this standard F.4 PTP options
220	Annex G (informative) The asymmetry compensation measurement procedure based on line-swapping G.2 Pre-conditions for measurement G.3 Measurement procedure
222	Back Cover

Additional information

Standard Title	IEEE Standard for Local and Metropolitan Area Networks–Timing and Synchronization for Time‐Sensitive Applications Amendment 1: Inclusive Terminology (Published)
Published Code	IEEE
Publication Date	2024
Pages Count	222

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