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Suit Up

join:2003-07-21
Los Angeles, CA

2 edits
reply to NormanS

Re: Ping times

said by NormanS:

albeit with slightly higher deviation.

That's the problem. Due to the nature of TDMA/CDMA, your ping times are going to depend on node congestion. During peak hours they will usually be higher than during non-peak times. So that's why I say in general Cable ping times are going to be higher. But yes, in perfect conditions, they can be lower.


NormanS
I gave her time to steal my mind away
Premium,MVM
join:2001-02-14
San Jose, CA
kudos:12
Reviews:
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Congestion can afflict DSL, as well. A congested DSL aggregation router can send latency through the roof. OTOH, a well managed HFC can avoid congestion.

Deviation is a measure of the spread around the average. With my Interleaved ADSL2+ connection, deviation is normally 1ms to 2ms; same as my old Fastpath ADSL connection. My observation of cable latency is a deviation of 4ms to 5ms.
--
Norman
~Oh Lord, why have you come
~To Konnyu, with the Lion and the Drum


Suit Up

join:2003-07-21
Los Angeles, CA
said by NormanS:

Congestion can afflict DSL, as well. A congested DSL aggregation router can send latency through the roof. OTOH, a well managed HFC can avoid congestion.

Yes that's true, but that aspect can affect cable as well, but DSL doesn't have the same problem as the TDMA/CDMA management at the first hop.

If your deviation is only 4-5ms, then that's pretty good. Right now mine is 46.651ms: even though I managed to get a min of 11.140ms, the max was still 210.431ms.


mackey
Premium
join:2007-08-20
kudos:14
said by Suit Up:

If your deviation is only 4-5ms, then that's pretty good. Right now mine is 46.651ms: even though I managed to get a min of 11.140ms, the max was still 210.431ms.

The only times I've ever seen pings that high is when I'm also up/downloading stuff. I just ran 2 tests back to back, the first one with an idle connection and the next while running a speed test (got 29.8 Mbps on my 30/5 connection BTW).

1st one, all <11.5 ms:

2nd one, while downloading at 29.8 Mbps:

So yes, if you're downloading something large then your pings will creep up. Otherwise they stay rather low. If yours are creeping while not downloading then I would replace your router as it's the most likely cause.

/M


Suit Up

join:2003-07-21
Los Angeles, CA
I wasn't downloading or uploading anything. My guess is it's just congestion and still being on DOCSIS 2.