Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
How About a Receive Squelch???
#1
I've been wanting to ask this, and recently heard it on another list. With the abundance of consumer AP's and other WISP out there, can a Squelch be added to the radio config? Set the min. signal strength and ignore the rest. Like in my area, listen to all signals less than (-80), but ignore all those above. Possible ? Others want / need?

Thanks,

Tim Kerns
Reply
#2
What's your goal? Your AP will still be receiving the noise, so in the grand scheme of things it probably wouldn't boost capacity or performance all that much.
Reply
#3
The goal is to block or ignore unwanted noise and improve performance.... the radio also receives signals from all the the channels, but is able to ignore or filter them, can this be extended to signals on the same channels, setting a "filter" or "threshold" for the required signal strength. It may not be possible through software and may only be possible in the firmware

Note: Tony or Lonnie, this should be in the "Feature wanted" area, I incorrectly started it in the Doc. Please move if you can. --- Thanks
Reply
#4
I think this was one of those "If you can't Fix it, Feature it" settings back when the sens levels were -85 dbi.

I always got into more trouble than it was worth trying to make it work right.
The problem lies with the variable nature of the received signals.
Bursting signals can drive the threshold selector nuts trying to keep up.
The new cards are down to -105 for sensitivity I think you will find the tools are built in now.
If a system is that bad It is most likely time to revisit antenna selection or add better radios.
I have also heard amazing results using bandpass filtering for this type f problem

Just my 2C
Dave
<
@)
(Cooter>>
^^^^^^^^^^
Vrablic

"I have no excuses, Just reasons"

Reply
#5
what cards are you speaking of that have a -105 for ears?
There are 10 types of people in the world who understand binary, those who do and those who don't.
Reply
#6
I read an article that there are chipsets coming that reached way down for their signals and they made reference to -105.
(I wonder how big the supercooler is.)
They also wrote a lot about the new magic they are adding to automatically enhance the packet path on it way through the network.
I'll see if I can find it as it was like reading a science book.
Dave
<
@)
(Cooter>>
^^^^^^^^^^
Vrablic

"I have no excuses, Just reasons"

Reply
#7
I did a google on it and from what I can tell it is thet XR (eXtended Range) technology provided by atheros chips. From what I gather it is rates that go below 1mb/s eg. 0.5mb/s and .25mb/s.
There are 10 types of people in the world who understand binary, those who do and those who don't.
Reply
#8
From what I have heard, MT has announced this on their product. You can set the senstivity to -82 (as an example) and it ignores all signals above this, reducing interference from unwanted signals (noise). With as much RF noise that we have in our area. something like this is needed to continue to offer service. Smaller channels help, but that requires a replacement of many CPE's and is not financially possible.
Reply
#9
So you're saying you have two identical ESSID's but you want to ignore one of them because it is too low?

I'm not sure I understand the benefit of this when applied to digital modulation. There is no analog component except RSSI and I really see no point to ignoring low signals since they are most likely ignored anyway, based on the ESSID.

Educate me if I have it wrong. Explain how it is supposed to work, and not simply that MT has it.

Also, how will this feature benefit all of those CPE's that cannot do Cloaking. They would also not be able to do the squelch, so how does this feature save your business? Sorry, but I'm confused.
Reply
#10
I think the general idea is to somehow set the radio ignore any signal of any type from anywhere where its signal strength is below -82 (for example) ?

Theoretically this would cut down on the impact that the -85 signal wifi devices would have on your AP or your client with this feature.

Sounds good in theory...
StarOS Community Wiki: http://staros.tog.net/
Reply


Forum Jump:


Users browsing this thread: 1 Guest(s)