|
Work item:
|
G.8275.2/Y.1369.2 (2022) Amd.2
|
|
Subject/title:
|
Precision time protocol telecom profile for phase/time synchronization with partial timing support from the network - Amendment 2
|
|
Status:
|
Consented on 2024-07-12
|
|
Approval process:
|
AAP
|
|
Type of work item:
|
Recommendation
|
|
Version:
|
-
|
|
Equivalent number:
|
-
|
|
Timing:
|
2024-07 (High priority)
|
|
Liaison:
|
IEEE 802, 3GPP, O-RAN
|
|
Supporting members:
|
Microchip, Nokia, Ericsson, Huawei, Calnex, Adva
|
|
Summary:
|
This Recommendation specifies a profile for telecommunication applications based on [IEEE 1588] precision time protocol (PTP). The profile specifies the IEEE 1588 functions that are necessary to ensure network element interoperability for the delivery of accurate phase/time (and frequency) synchronization. The profile is based on the use of partial timing support (PTS) or assisted partial timing support (APTS) from the network architecture as described in [ITU-T G.8275] and definitions described in [ITU‑T G.8260].
Amendment 2 to Recommendation ITU-T G.8275.2 (2022/11) provides the following updates:
Added text to clause 6.3.2 on the use of twoStepFlag in [IEEE 1588-2008] vs. [IEEE 1588-2019] based implementations.
Added clause 6.7.12 on “wait-to-restore time” and portDS.wtrState.
Added “portDS.twoStepFlag” to Table A.5.
Replaced the word “synchronizing” with “locked” in Annex F.
Replaced “timeTransmitter” with “Telecom-Grandmaster” in Appendix V.
“Data set comparison algorithm” with references to [IEEE 1588] on defaultDS.timeReceiverOnly, portDS.timeTransmitterOnly, and portDS.notTimeTransmitter.
Added a note to “Table 3 – Applicable clockClass values” on T-BC-A holdover
Added performance monitoring Annex F of [ITU-T G.8275] as an optional feature of this profile
Clarified defaultDS.deviceType with a note added to Table A.1
Revised terminology based on inclusive language
Added clause 6.10 on “Dataset member for PTP clockMode”.
Added clause 6.11 on “Dataset member for PTP nodeClass”.
Added new data set members and deleted not used data set members in Annex A.2.
|
|
Comment:
|
-
|
|
Reference(s):
|
|
|
Historic references:
|
|
Contact(s):
|
|
| ITU-T A.5 justification(s): |
|
|
|
|
First registration in the WP:
2024-01-11 12:44:09
|
|
Last update:
2024-07-24 17:03:04
|
