100g is added to 800GBASE-VR8/SR8 to the specification, and further information is required for Ber's target value.

In "800GBASE-R" and "1600GBASE-R", Ber is 5.0E-14-14-14.The error rate of 0E-14 is appropriate

　IEEE 802, which mainly introduced the components around the optical fiber.3 Beyond 400 GB/S Ethernet Study Group "March 2021 meetings include various other considerations.

　First of all, the story of "Ber Target" announced by Huawei.For example, "IEEE 802 explained in this article.According to each standard of "3BS", Ber (bit error rate) initially 1.0E-15 is the minimum, if possible 1.It seems that there was a fierce proposal to put it in 0E-17, but eventually 1.After the story that it has settled down to 0E-13, according to the past changes, about "800GBASE-R" and "1600GBASE-R" 5.0E-14-14-14.Isn't it appropriate to aim around 0E-14?Was shown.

1.0E-17は、1時間あたりのエラーレートが0.0144回相当、つまり約3日に1回エラーが発生する程度という、猛烈にエラーが少ないレートになるBERを5.0E-14にすると、「1600GBASE-R」ではやや多めではあるが、おおむね「100GBASE-R」と大差のないオーダー。1.0E-14は（実装側で）やや厳しい感じに

　Of course, Ber is an error rate to the last, so the lower the viewpoint of securing a communication path, the better.

　However, in fact, in order to secure Ber, it is a story that uses more powerful FECs and installed a more effective DFE.Increasing the effect of DFE requires more complex DFEs (such as increasing the number of taps), which leads to an increase in circuit scale and power consumption.

　Also, strengthening FEC increases the redundant bit and leads to a decrease in effective transfer rate.In order to match the effective transfer rate to 200GB per lane, it is necessary to raise the actual data rate.This only increases inhibition factors, such as increasing power consumption again and becoming difficult to select light emission / light receiving elements corresponding to the data rate.

　Thinking about that, you have to decide whether to balance Ber and other factors somewhere.However, when considering this Ber, there is a debate about which numerical estimation is estimated.

BERを1.0E-14に設定する場合の問題点は、後述する「MTTFPA」と実装の難易度、BERを測定する時間を表すtest timeの短さということになる赤字の部分が、BERに影響を及ぼす箇所（とBER測定ポイント）。

　There are multiple causes of errors, and by combining errors, multiple technologies are combined, 1 in total..0E-14.Considering the realization of 0E-14, it leads to a debate where Ber will strengthen when the target value is not enough.