I have a couple of Edimax wireless units, which for the money (they are cheap), are the Swiss Army knife of wireless units (you can link them together, do bridges etc). They only operate in the 2.4Ghz band, but they do all the wireless standards, right from the original 10Mb B standard, then G (54Mb) through to varying speeds of N with the option of MIMO (N using 2 frequency bands).
The reason I'm posting is because a while back, I was playing about with them, and I experienced a very similar issue to yours (if not worse than yours), whilst the units where configured in N mode. As a result, I have actually reverted both units back to G only (for work, I need to have zero jitter, because I do a lot of stuff on the SSH command line).
My setup is simple:
PC -> (wired) -> Edimax -> (wireless bridge) -> Edimax (AP) -> (wired) -> switch -> (wired) -> Router
Whilst running these two units in N mode, I got no latency or jitter across the bridge. As soon as I fired up my Sony laptop however, which then associates with the Edimax (AP), ping times went through the floor, both on the bridge from the PC, and also on the laptop.
I had a gander on Google and I don't know for sure (maybe someone can clarify this) but it seems sometimes not all manufactures adhere to the 'standard' of the protocol, meaning some cheaper kit doesn't handle subtle nuances that exist between manufactures (which looks to be the case with these units, and the card in my Sony laptop, maybe).
To solve this problem? I just turn my laptop off. This seems to make the AP happy, meaning the bridge returns to normal. But hardly a workable solution, is it?
So the only way I've gotten around this is to ditch N, and revert both units back to G. I now have a rock solid no jitter bridge and also a no jitter association from the laptop to the AP.
It's a shame really that these kind of issues occur - I thought the N standard is good, but it seems this is a myth. Truth be known, and I'm sure you've heard it before, if you want good wireless kit that doesn't suffer from these problems, spend the money and buy good equipment.
For £120, I got 3 of these Edimax units (one spare just now). But to do the same thing using say d-link or Cisco kit would probably have cost me double that amount (if not more), but, I probably wouldn't have this annoying N issue to contend with.
As it happens, I'm quite happy running G as this is fast enough but still, it is quite annoying.
Edited by mixt (Sat 04-Jun-11 13:05:27)