Broadband Related > Broadband Technology
SES and ES, and CRCs with L2ReTX
Weaver:
Two questions:
* Firstly, about the definition of SES; Kitz gives a definition:
--- Quote ---As the name indicates this is more worse than an Errored Second (which only needs one event to trigger an ES).
A Severely Errored Second is a one second period which contains 30% or more errored blocks OR several other events such as one or more OOF.
--- End quote ---
I’m unclear what a ‘block’ means in this context ? Can anyone help me out ?
* Second question: When counters list CRC error counts, is this before the application of any L2ReTX protocol (G.INP or PhyR) ? That is, before L2ReTX can fix the error?
burakkucat:
--- Quote from: Weaver on April 05, 2021, 11:12:03 PM ---* Second question: When counters list CRC error counts, is this before the application of any L2ReTX protocol (G.INP or PhyR) ? That is, before L2ReTX can fix the error?
--- End quote ---
I believe the count is the number of errors that are left after all attempts at correction have been performed.
Weaver:
Ah, I know that, thanks ! :)
I don’t know exactly what the definition of SES is though, maybe someone could help me with that.
And I’ve just spotted a typo in that definition on Kitz’ page : "more worse", and elsewhere "additonal" (sic) for "additional".
burakkucat:
--- Quote from: Weaver on April 06, 2021, 01:20:24 AM ---And I’ve just spotted a typo in that definition on Kitz’ page : "more worse", and elsewhere "additonal" (sic) for "additional".
--- End quote ---
As they are on a main site page I am unable to make the appropriate adjustments.
Weaver:
> I believe the count is the number of errors that are left after all attempts at correction have been performed.
So, as a check on my understanding, all L2ReTX retransmissions are carried out up to some max count limit or time limit and then the retransmission sequence operation is regarded as ‘fail’. Is that fail counted as 1 CRC error in the stats we’re used to seeing? (Not the number of retransmissions received corrupted.) I ought to read G.INP for some insight.
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