Along what Michael Richardson said, with GPON I have seen where idle latency was ~1.5ms, but under load latency was about 0.2ms. I wouldn't be surprised if TDMA scheduling playing a factor. I don't know what kind of latency SLAs DOCSIS can or typically have. GPON has scheduling latency all the way down to 0.5ms.

On Tue, Jan 16, 2018 at 3:34 PM, Michael Richardson <mcr@sandelman.ca> wrote:

Arie <nospam@ariekanarie.nl> wrote:
    > I'm puzzled by this result, somehow sending 300KB/s of empty packets
    > upstream drastically improves the latency of my connection when it's
    > receiving many downloads.

Maybe not exactly power save, but perhaps asking for the upstream bandwidth
gets the CMTS to notice you more often and schedule a dump of it's queue of
traffic for you.

--
]               Never tell me the odds!                 | ipv6 mesh networks [
]   Michael Richardson, Sandelman Software Works        | network architect  [
]     mcr@sandelman.ca  http://www.sandelman.ca/        |   ruby on rails    [


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