Skip to main content

73 Messages

 • 

1.1K Points

Fri, Apr 11, 2014 8:24 PM

Answered

Meaning of the to/from numbers for meshed AP's

In ZD on the Dashboard, each meshed AP shows signal strength to/from the source AP. But it's not clear which number is which. I see also the little radiowave symbols go up and down, but is the up meaning uplink, which would mean signal strength from the meshed AP?

Responses

368 Messages

 • 

5.6K Points

7 years ago

I haven't found anything in the user guide about this but I'll take a wild guess that it's a FROM/TO relation.

So first number FROM your ROOT AP and the other TO your ROOT AP which in your case is 35% FROM "7762 ROOF EAST" TO "WEAVER" and 45% from "WEAVER" TO "7762 ROOF EAST"

73 Messages

 • 

1.1K Points

7 years ago

Thanks for the reply!
You are right it's a FROM/TO relationship, as when I hover over the little arrows, a small popup says as much.
My guess is exactly the opposite - the 7762 has external omni antennas, so I would think the signal FROM the 7762 is a tad stronger at the receiving end (WEAVER) than from WEAVER to the 7762.

It would be nice if Ruckus can clarify this. That 5% on MAINTENANCE SHOP concerns me, but without knowing what I'm seeing, it's hard to try to fix it.

368 Messages

 • 

5.6K Points

7 years ago

Integrated adaptive antennas usually have higher gain than the attached omni as they can focus the energy not spread it out like omni. That's probably why you are seeing lower signal on the downlink than up.

another reason why there is this imbalance is also the fact that link is not reciprocal (not the same in both directions).

73 Messages

 • 

1.1K Points

7 years ago

Hmmm... I saw much better to/from numbers after installing the omnis. But that was a year ago, maybe I missed something. I might try it again without the omnis.

But no one knows for certain which number is which?

683 Messages

 • 

11K Points

I've posed the question internally and will report findings back here.

14 Messages

 • 

260 Points

7 years ago

Hello Lonnie,

I'm a Ruckus Technical Support Eng.
In the below figure, the circled signal % value is the receive signal strength at the mesh AP (% value on the right hand side). The first value is the receive signal strength from mesh to root AP.



To get an idea of how much tput you're getting, translate the percentage to RSSI by clicking on the percentage value (or look at below chart) and then translate the
SNR value with the 2nd reference below:





For Primoz' comment with respect to antenna, he's absolutely right, the integrated antenna does have a higher gain than an omni antenna. Not only that but the integrated antenna mitigates interference due to our beamforming properties. Remember as well that the 7762 has two integrated antennas where the 7762-Sector only has 2.4integrated antenna, 5GHz has to be external.
One of the few benefits that I see from an external antenna is that you can place it at locations that you may not be able to place the AP at. One more note, remember that the optimal installation orientation of an AP is with the dome pointing down, unless you have a stairway type of coverage.
Keep in mind that you also have the option of opening up a support case by logging in to your support portal or by calling us at 855-782-5871.

73 Messages

 • 

1.1K Points

7 years ago

Hello, I appreciate the explanation!

I don't know why I am seeing the opposite of what you state about the performance of the omnis. My 7762 is oriented with the omnis straight up. I was told by members of this forum that the 5 Ghz mesh operates only on the external antennas on a 7762. I distinctly remember seeing drastic improvement in these TO/FROM percentages when I put the omnis on, although I don't remember exact numbers, but 20% improvement comes to mind. Whatever the numbers were, it was a no-brainer to continue using omnis for the mesh.

Perhaps I'm missing something with the orientation. It's raining here, so sometime soon I'm going to remove the omnis and orient the 7762 with the dome down, then compare mesh signal strengths again just to see if the internal antennas really make that difference in gain you're referring to.

Thanks again.

368 Messages

 • 

5.6K Points

Well as I said. I don't know your topology. IT might be that external omnis are better than BeamFlex. What you can do even when it rains is that you disable external antenna support in the WEB GUI and compare.

73 Messages

 • 

1.1K Points

Good idea, I'll try that. Thank you again.

60 Messages

 • 

1K Points

There different types of 7762: the 7762-S, 7762-T and 7762-S-AC need external 5GHz antenna, the 7762 and 7762-AC can do without (optional).

14 Messages

 • 

260 Points

7 years ago

The 7762 comes in many flavors. Here are some models:

7762 = 901-7762-US01 = 2.4 and 5GHz antennas are integrated.
7762-AC = 901-7762-US03 = 2.4 and 5GHz antennas are integrated.
7762-S = 901-7762-US51 = 2.4GHz integrated only
7762-S-AC = 901-7762-US53 = 2.4GHz integrated only
7762-T = 901-7762-US91 = 2.4GHz integrated only

If your AP does not match any of these part number models, please provide me with the part number and I will let you know what your integrated antennas are.

The placement of the external is important. You could have a really good placement of external omni antennas where the 5GHz external has line of sight to all of the mesh APs, as opposed to the 5GHz integrated having visibility to less mesh APs. Same logic behind the 2.4GHz external antenna having better coverage to wireless clients than the integrated antenna because of placement.

Will highly suggest to open a case if you require further assistance.

73 Messages

 • 

1.1K Points

7 years ago

It's a regular 7762, not a variant. First one in your list. According to your descriptions, I've been operating on wrong information. I will open a support case from here if needed.... thanks.

73 Messages

 • 

1.1K Points

7 years ago

Hang on, I'm seeing a problem. Doesn't the "uplink AP" refer to the root AP?

Roberto says (emphasis mine):
In the below figure, the circled signal % value is the receive signal strength at the mesh AP (% value on the right hand side). The first value is the receive signal strength from mesh to root AP.

But ZD says: "Signal strength from/to uplink AP", indicating the 2nd value is to the root AP.

Shouldn't ZD say "to/from" assuming that it means "respectively"?

So I am confused yet on which number is which.

14 Messages

 • 

260 Points

7 years ago

As mentioned Lonnie, the rx signal at the mesh AP is the 2nd value, the one I circled in my first post. If you hover over both percentages, you will see 'from/to' in both percentages.
You can do an experiment for yourself where you can lower the transmit power at one of the mesh APs to the root AP and then you will see the first figure % value go down in % value between that mesh/root link.

73 Messages

 • 

1.1K Points

7 years ago

Ok, thank you.
So the word "uplink" refers to the mesh AP. I misunderstood that, but it's clear now.

73 Messages

 • 

1.1K Points

6 years ago

Update. First, here are the numbers when using the omnis


So, I disabled all WLANs on the 7762, disabled the external antennas, enabled all WLANs, and hung it dome down in an east-west direction, parallel to the pipe it's hanging on.
Results are worse than when using the omnis, in the sense that I am losing one of the meshed APs.


Then I hung it dome down in north-south direction, thinking maybe it has more Rx sensitivity out the "ends" of the dome, since all the mesh AP's are north or south of the 7762.
Results are even worse - I'm losing two of the meshed APs.


But I noticed that mesh AP "WEAVER" likes the dome down/east-west position of the 7762. So I am going to take a spare AP out to MAINTENANCE SHOP and NORMAN and see if a different mounting angle or location will improve these numbers.