Movement toward PAR division of "IE...
18
12
Movement toward PAR division of "IEEE P802.3DF", but also work efficiency?
Proposal of division of physical standards, there are cases in the past
Therefore, we propose to divide the physical standards into multiple physical standards, "after completing standardization of basic technical elements."
当初の目的では、これら全てを1つのPARでカバーする予定だったが、さすがにいろいろと無理があるThe division of the standard (in the case of IEEE terms) is not unusual.In the past, IEEE P802.3ct to 400GBASE-ZR IEEE P802.The case divided into 3cw "" 100GBASE-ZR "and" IEEE P802.Divide "400GBASE-ZR" from 3ct "and" IEEE P802."3CW" is to formulate].
In this presentation, IEEE P802 is actually.3cn → IEEE P802.3CN + IEEE P802.3ct → IEEE P802.3CN + IEEE P802.3ct + IEEE P802.Examples of 3CW and three standards are introduced.
まずDWDMをP802.3cnから、次いで400Gb/sをP802.3cwから分離した格好になるThis PAR split is a regular method stipulated in IEEE 802 Operations Manual, one of the indispensable methods to proceed with specification formulas smoothly.
Speaking of my personal impressions, I think that 100GB/s and 200GB/s should be divided for 100GB/s and 200GB/s per lane, and if you really want to use Coherent or SHD for 200GB/S, this is also the case.It seems that the division is that the specification formulation work progresses quickly.
It is unknown whether NOWELL is thinking in the same way, but the following is proposed as a scenario when actually split.
200Gに関しては、光ファイバーと銅（同軸）配線では変わる点が多いため、Coherentまで含めて3つ以上に分割される可能性もありそうだIf you think about it normally, the 100GB/s per lane is a standard that is already in progress, both optical fiber and copper distribution, so if you simply make this in 8 lanes, it will be realized, so the items that require technical examinations are likely.There are not many, and the work is relatively crispy.
The 200GB/s per lane, although the technical potential is visible, it is often not enough to realize it at the product level.This is the same for Coherent/SHD, and there are many items to consider to bring to the product level.
However, if you try to consider all of these under the same PAR, you may run out of work time.In these cases, you can secure working time by splitting PAR.
PARが承認されてからRevCom（Standards Review Committeeの審議）までは最長4年という制約があり、これを超えることはできない。PAR分割はこれに対する1つの解決案となるIn fact, IEEE P802.3ct (rather, already IEEE 802.In the case of the standardization is completed as 3ct, the following table is shown in the table below, and by dividing the PAR, the working expiration date is shifted behind.
| PAR承認 | 標準化予定日 | 標準化完了日 | |
| IEEE P802.3cn | 2018年9月 | 2020年6月 | 2019年11月 |
| IEEE P802.3ct | 2019年2月 | 2021年9月 | 2021年6月 |
| IEEE P802.3cw | 2020年2月 | 2023年8月 | (現在作業中) |
Therefore, first of all, by working ahead of the specifications that are common to all standards, and dividing the PAR at the end of this, it takes a lot of time (in this case, 200GB/S Lane or Coherent).By splitting into a PAR, the deliberation of the common specifications is over, and the specifications can be considered in a form that concentrates on the hassle.
On the other hand, for the highly feasible (100GB/s LINK) specifications, the standardization is completed first without waiting for the time -consuming specifications, which is a convenient mechanism.。
Based on this, IEEE P802.This proposal is that 3DF should be divided into multiple PARs.
これはあくまで提案であり、まだPAR分割は決まった話ではないと念を押しているあたりは、やはりこの方針にさまざまな異論を持つ人がいるのかもしれないBy the way, Straw Poll or Motion has not been made in particular with this proposal.I think this will be ultimately reflected in Draft Project Document.
