The active projects are the projects for which Project Authorization Request (PAR) was approved by IEEE. Below is the list of active projects:

• 1588a:  Enhancements for Best Master Clock Algorithm (BMCA) mechanisms
  • PAR Approval Date: 2020-09-24
  • Expected Date of submission: Jul 2021
  • Scope: This amendment: a) Enhances existing mechanisms and creates new ones that contain information about the time accuracy to support execution of BMCAs, while maintaining backward compatibility, or assist in the development of alternate BMCAs; b) Provides informative text to explain the execution of the BMCA; c) Provides informative text to guide the creation of alternate BMCAs; d) Provides an optional mechanism for managing Announce timeout; and e) Corrects errors in the text and clarifies passages that are unclear.
• 1588c:  Clarification of Terminology
  • PAR Approval Date: 2020-09-24
  • Expected Date of submission:  Dec 2021
  • Scope:  This amendment will improve the terminology in the standard, and more completely specify the behavior of the protocol, in the following ways: • Clarification of the term “retransmit” • Elaboration of how type-length-value (TLV) message extensions are handled by Boundary Clocks and Transparent Clocks • Fix editorial errors and clarify unclear statements.
• 1588d: Guidelines for selecting and operating a Key Management System
  • PAR Approval Date: 2020-09-24
  • Expected Date of submission: Dec 2021
  • Scope: This amendment will enhance the security option of the IEEE Std 1588-2019 standard in the following ways: • Add guidelines on the selection and operation of specific key management technologies to Annex S. This involves the currently considered key management options and may also leverage additional key management approaches like Network Time Security (NTS). • Fix editorial errors and clarify unclear statements in Annex S and Subclause 16.14.
• 1588e: MIB and YANG Data Models
  • PAR Approval Date: 2020-09-24
  • Expected Date of submission: Jun 2022
  • Scope: This amendment specifies MIB data models and YANG data models for all data sets of IEEE Std 1588-2019, and other possible amendments to IEEE Std 1588-2019. The amendment uses the MIB and YANG standards as specified by the Internet Engineering Task Force (IETF). The amendment does not specify notifications, only configuration and state for data sets. In addition to introductory text and other normative text, the amendment produces module files that specify the MIB and YANG data models. The module files produced by the amendment are located on a public repository, and the content of each module file is not listed in the IEEE Std 1588 amendment document. The amendment will include the references to each module file. This amendment corrects errors in the text and clarifies unclear passages.
• 1588f:  Enhancements for latency and/or asymmetry calibration
  • PAR Approval Date: 2020-09-24
  • Expected Date of submission: Dec 2022
  • Scope: This amendment enhances support for latency and asymmetry calibration, and also provides informative text related to these enhancements. It corrects errors in the text and clarifies unclear passages.

Closed Projects:

Completed projects that resulted in amendments:

• 1588g:  Master-slave optional alternative terminology
  • PAR Approval Date: 2020-12-03
  • Expected Date of submission: Dec 2022
  • Scope:This amendment adds an optional alternative suitable and inclusive terminology to the terms “master” and “slave” but it does not replace the terms “master” and “slave” In addition, the amendment fixes errors in the standard and clarifies unclear passages.
  • Date of publication: 15 March 2023
  • Published as (link):
    1588g-2022 – IEEE Standard for a Precision Clock Synchronization Protocol for Networked Measurement and Control Systems Amendment 2: Master-Slave Optional Alternative Terminology
• 1588b: Addition of PTP mapping for transport over Optical Transport Network (OTN) –
  • PAR Approval Date: 2020-09-24
  • Expected Date of submission: Jul 2021
  • Scope: This amendment: a) Adds a normative annex that specifies the mapping of PTP to OTN; b) Adds an enumeration value to the network Protocol table (Table 3, in 7.4.1); c) Corrects errors in the text and clarifies unclear passages.
  • Date of Publication: 16 September 2022
  • Published as (link):
    1588b-2022 – IEEE Standard for a Precision Clock Synchronization Protocol for Networked Measurement and Control Systems Amendment 1: Precision Time Protocol (PTP) Mapping for Transport over the Optical Transport Network (OTN)