Hi Bob,
Reviewing the preview draft, I noticed that a new abbreviation “LFSR” is added.
I found it interesting that it is not defined already; however, in reviewing other scrambler specifications where this term might have been used, it is always spelled out as “linear feedback shift register”. Also, in all places, the scrambler is defined by its polynomial, and an LFSR is used only as a possible implementation for illustration purposes: See 40.3.1.3.1, 97.3.4, 146.3.3.4.1, 147.3.2.8, 149.3.4.
Clauses 101 and 102 are the only places where “linear feedback shift register” is used as a definition of the scrambler, and even there, the abbreviation LFSR is not used.
For consistency I would suggest using “linear feedback shift register” in the few cases this term is used and avoiding a new acronym definition for used in a single clause.
I can also comment on it in WG ballot if it’s preferable.
Best regards,
This is the announcement of the availability of the preview draft, D1.3, of IEEE P802.3cz Multi-Gigabit Optical Automotive Ethernet.
During the upcoming March 2022 IEEE 802.3 Plenary, the IEEE P802.3cz Multi-Gigabit Optical Automotive Ethernet Task Force will meet to review this draft, and it is expected a request will be made to forward IEEE P802.3cz Multi-Gigabit Optical Automotive Ethernet draft (D1.3 plus any changes that might be made during the upcoming Plenary) to Working Group ballot at the IEEE 802.3 Closing Plenary. As required by the IEEE 802.3 Rules, any textual changes made to the draft during the Multi-Gigabit Optical Automotive Ethernet Task Force meeting will be presented for review during the IEEE 802.3 Closing Plenary prior to a vote for approval to go to Working Group ballot. Please review this draft so that you will be prepared to vote on a request to forward to Working Group ballot.
The title, scope, purpose and need for this project, from the IEEE P802.3cz PAR, are as follows:
Standard for Ethernet Amendment: Physical Layer Specifications and Management Parameters for Multi-Gigabit Optical Automotive Ethernet
Specify additions to and appropriate modifications of IEEE Std 802.3 to add Physical Layer specifications and management parameters for multi-gigabit optical Ethernet for application in the automotive environment.
Applications in automotive industries have begun the transition of legacy automotive networks to Ethernet to support Advanced Driver Assist Systems. This has generated a need for data rates greater than 1 Gb/s in the automotive environment. Optical fiber has been used in automotive applications both for Ethernet and other protocols. This project will complement other 802.3 projects working on specifications for electrical media operation at rates greater than 1 Gb/s in the automotive environment.
The number of cameras in vehicles is increasing as is the camera data rate with movement to higher resolution video. Optical data links are applicable to both the vehicle network backbone as well as connection of selected devices where location or other factors favor using an optical link.
Standard for Ethernet Amendment: Physical Layer Specifications and Management Parameters for Multi-Gigabit Optical Automotive Ethernetusing graded-index glass optical fiber for application in the automotive environment.
Specify additions to and appropriate modifications of IEEE Std 802.3 to add Physical Layer specifications and management parameters for multi-gigabit optical Ethernet using graded-index glass optical fiber for application in the automotive environment.
Applications in automotive industries have begun the transition of legacy automotive networks to Ethernet to support Advanced Driver Assist Systems. This has generated a need for data rates greater than 1 Gb/s in the automotive environment. Optical fiber has been used in automotive applications both for Ethernet and other protocols. This project will complement other 802.3 projects working on existing IEEE Std 802.3 Electrical Automotive Ethernet specifications for electrical media operation at rates up to 10 Gb/s, as well as proposedspecifications for electrical media operation at rates greater than 10 Gb/s in the automotive environment.
The number of cameras in vehicles is increasing as is the camera data rate with movement to higher resolution video. Optical data links are applicable to both the vehicle network backbone as well as connection of selected devices where location or other factors favor using an optical link.
The IEEE P802.3cz/D1.3 draft can be accessed as follows:
The draft is posted for your pre-view only; neither the document nor access information should be copied or redistributed to others in violation of document copyright.
Chair, IEEE 802.3 Working Group
Chair, IEEE P802.3cz Multi-Gigabit Optical Automotive Ethernet Task Force
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