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Author Topic: Openreach UK Trial Finally Brings G.INP to ECI FTTC Broadband  (Read 5698 times)

Weaver

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Re: Openreach UK Trial Finally Brings G.INP to ECI FTTC Broadband
« Reply #75 on: March 29, 2020, 06:52:11 AM »

Forgive me, I forget - is there upstream G.INP on your link now? If so, what does it do for you? You’re getting roughly 4% more downstream speed then.
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kitz

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Re: Openreach UK Trial Finally Brings G.INP to ECI FTTC Broadband
« Reply #76 on: March 29, 2020, 01:28:29 PM »

Re-tx low
 
I was getting practically the full 3600 Err Secs per hour for over 3.5hrs.
Aside from a small respite for a couple of minutes at 8:30, I was racking up at the rate of 1 E/Sec per second from ~7:30 until just gone 11am.

INP rein and interleave delay have not been added. 

Code: [Select]
                        Bearer 0
INP:            47.00           0.00
INPRein:        0.00            0.00
delay:          0               0
PER:            0.00            6.15
OR:             0.01            202.87
AgR:            69030.25        20203.27
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kitz

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Re: Openreach UK Trial Finally Brings G.INP to ECI FTTC Broadband
« Reply #77 on: March 29, 2020, 01:33:52 PM »

Forgive me, I forget - is there upstream G.INP on your link now? If so, what does it do for you? You’re getting roughly 4% more downstream speed then.

This is a trial for downstream retransmission on ECI cabs.   ECI's supposedly cant do upstream.
Yes, the potential gains for those on ECI cabs who previously had Interleaving could be even greater.   
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Chrysalis

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Re: Openreach UK Trial Finally Brings G.INP to ECI FTTC Broadband
« Reply #78 on: April 07, 2020, 08:10:54 PM »

wow trial already suspended :( thats why not many on it
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burakkucat

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Re: Openreach UK Trial Finally Brings G.INP to ECI FTTC Broadband
« Reply #79 on: April 07, 2020, 08:27:27 PM »

wow trial already suspended :(

Is it?  :-\  Do you have a link to the Openreach announcement, please?
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Chrysalis

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Re: Openreach UK Trial Finally Brings G.INP to ECI FTTC Broadband
« Reply #80 on: April 07, 2020, 08:49:53 PM »

Is it?  :-\  Do you have a link to the Openreach announcement, please?
i can pm
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burakkucat

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Re: Openreach UK Trial Finally Brings G.INP to ECI FTTC Broadband
« Reply #81 on: April 07, 2020, 08:52:05 PM »

Thanks.  :)
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mrk26

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Re: Openreach UK Trial Finally Brings G.INP to ECI FTTC Broadband
« Reply #82 on: April 07, 2020, 10:10:05 PM »

wow trial already suspended
Is ther somewhere officiall info about?
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Alex Atkin UK

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Re: Openreach UK Trial Finally Brings G.INP to ECI FTTC Broadband
« Reply #83 on: April 07, 2020, 10:12:00 PM »

wow trial already suspended :( thats why not many on it

I kinda expected that, its risky doing anything that might decrease stability during the current situation.
« Last Edit: April 11, 2020, 05:06:31 AM by Alex Atkin UK »
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kitz

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Re: Openreach UK Trial Finally Brings G.INP to ECI FTTC Broadband
« Reply #84 on: April 11, 2020, 01:17:36 AM »

Since that horrendous burst of noise, I thought the DLM may hammer me.    But touch wood it looks like I've gotten away with it  :fingers:

After I rebooted the other day to clear the noise, when it came back up I noticed my SNRM was at 6.8dB but it immediately dropped down to 6.4 and as my sync was fairly rounded to 68Mbps (67790) and just assumed that it was just the DSM playing with power.   I happened to notice this evening my SNRM had gone back up to 6.8 again so out of curiosity I performed a resync.    Now connecting at 68960 so that's yet another small gain of 1.2Mbps giving a total gain of ~3Mbps since g.inp was enabled on my line.

My daily SHINE is still there as I'm seeing FEC's each morning for 1 min, but for the past few days it hasn't caused any E/Secs

No idea why DLM didn't kick in..  but I'm certainly not complaining.  :)

I had another stuck SHINE burst this morning.  The email notification took a while to come through as there were that many errors it was difficult to send or receive any data, but I was still able to stop it in about 10 mins. 

Total error seconds for the day was 683...  and the DLM has just taken action.   
Compared to 11,705 a couple of weeks ago when it didn't take any action.

----
Stats

Previous
Code: [Select]
Max:    Upstream rate = 24417 Kbps, Downstream rate = 68365 Kbps
Bearer: 0, Upstream rate = 20000 Kbps, Downstream rate = 68960 Kbps

                        Bearer 0
INP:            47.00           0.00
INPRein:        0.00            0.00
delay:          0               0
PER:            0.00            6.15
OR:             0.01            202.87
AgR:            69030.25        20203.27

Current
Code: [Select]
Max:    Upstream rate = 24776 Kbps, Downstream rate = 67197 Kbps
Bearer: 0, Upstream rate = 20000 Kbps, Downstream rate = 67984 Kbps

                        Bearer 0
INP:            51.00           0.00
INPRein:        1.00            0.00
delay:          0               0
PER:            0.00            6.15
OR:             0.01            202.87
AgR:            68054.16        20203.27



PS. 
I've noticed since I've been on G.INP that my max rate is always below my actual rate despite my SNRM being 6.4 dB. 
1) Is 6.4dB the new Target SNR as every sync I've done since being on re-tx has been at 6.4dB
2) Presumably the modem isn't correctly calculating the overheads for g.inp and making the correct adjustment for coding gain in a similar way to how it doesnt correctly take into account interleave overhead. 




 
« Last Edit: April 11, 2020, 01:52:54 AM by kitz »
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ejs

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Re: Openreach UK Trial Finally Brings G.INP to ECI FTTC Broadband
« Reply #85 on: April 11, 2020, 07:37:36 AM »

I think the target SNRM always was and still is 6.0 dB. If your modems always connect at a slightly higher SNRM, I think that'll just be the modems erring on the side of caution when estimating the rate/SNRM to connect at. Technically speaking, the very definition of SNRM is totally different with G.INP. Without G.INP, SNRM is defined relative to bit error rate (1 error per 107 bits), whereas with G.INP, SNRM is defined relative to MTBE (1 error in 4 hours).
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Alex Atkin UK

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Re: Openreach UK Trial Finally Brings G.INP to ECI FTTC Broadband
« Reply #86 on: April 12, 2020, 04:46:45 AM »

That's an interesting point.  Do the modems actually bother to try to calculate that or just report the SNRm as if G.INP did not exist?
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mrk26

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Re: Openreach UK Trial Finally Brings G.INP to ECI FTTC Broadband
« Reply #87 on: April 13, 2020, 10:34:13 AM »

Is there anyone who is on this trial on eci cabinets and using lantiq based chipset modem?
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kitz

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Re: Openreach UK Trial Finally Brings G.INP to ECI FTTC Broadband
« Reply #89 on: April 13, 2020, 12:25:07 PM »

My daily dose of SHINE got stuck again yesterday.  Total Err Secs for the day = 1483
I had a forced resync this morning at 03:48 and it looks like the DLM may have banded me at 67Mbps.


I've just tried another resync and still at 67Mbps

Code: [Select]
Max:    Upstream rate = 24881 Kbps, Downstream rate = 68700 Kbps
Bearer: 0, Upstream rate = 20000 Kbps, Downstream rate = 66999 Kbps
Bearer: 1, Upstream rate = 0 Kbps, Downstream rate = 0 Kbps
Link Power State:       L0
Mode:                   VDSL2 Annex B
VDSL2 Profile:          Profile 17a
TPS-TC:                 PTM Mode
Trellis:                U:ON /D:ON
Line Status:            No Defect
Training Status:        Showtime
                Down            Up
SNR (dB):        6.5             9.4
Attn(dB):        0.0             0.0
Pwr(dBm):        6.8             6.8

The INP value has also increased to 52.   
Notice also for the first time since being on G.INP my max sync is now more than my actual.   I'd commented just the other day about my max value being less since re-tx had been applied on my line.

Code: [Select]
                        Bearer 0
INP:            52.00           0.00
INPRein:        1.00            0.00
delay:          0               0
PER:            0.00            6.15
OR:             0.01            202.87
AgR:            67092.23        20203.27

                        Bearer 1
INP:            4.50            0.00
INPRein:        4.50            0.00
delay:          3               0
PER:            16.06           0.01
OR:             79.68           0.01
AgR:            79.68   0.01


G.INP doesn't cope well with my daily bursts of SHINE  :(

The reason I say doesn't cope well, is that when the bouts of SHINE stick, then whilst on G.INP absolutely no data can be sent or received on my connection.   
Prior to G.INP at least some data was able to get through and I would get DSLstat alerts informing me there was a problem.   

Each time it happens now, then I get loads and loads of these errors in my DSLstats event log, thus it may be some time before I notice there is a problem with my connection - making it too late to manually intervene like I used to be able to.

12 Apr 2020 08:50:35   Email alert failed (unable to login to SMTP server)
12 Apr 2020 08:51:13   Email alert failed (unable to login to SMTP server)
12 Apr 2020 08:52:14   Email alert failed (unable to login to SMTP server)
etc etc etc



It's annoying because that daily SHINE is usually only for a minute or so per day and the rest of the day its fine.    No amount of Interleaving or G.INP is ever going to be able to correct what happens during that SHINE burst.     Since being on G.INP those daily SHINE bursts have stuck far more frequently than they usually do.
Not quite sure what will happen next, because if the SHINE bursts continue to get stuck and I'm not getting email notifications then DLM I guess will just keep continuing to take further action with the banding?
« Last Edit: April 13, 2020, 12:36:43 PM by kitz »
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