Template for adding default 3GHz frequencies to SMs for CBRS

Technology CBRS
1

This template is to add the 2.5MHz raster from 3555MHz to 3695Mhz for use with CBRS on PMP450/PMP450i/PMP450b SMs.

The template also enables all the frequencies in the scan list and enables 5,10,15,20,30,40MHz channel bandwidths for scanning.

To add the template to your cnMaestro account, go to Configuration > Templates and click "Add Template".

Select "PMP" as Type and "SM" as Device mode. Add a friendly name for the template and select the JSON template file and then click "Save".

template-add.jpg
template-add.jpg1920Ă—1080 87.2 KB


To apply the template to already OnBoarded SMs in cnMaestro, go to the Manage > Configuration tab.

Select the network or Tower site with the devices you want to apply the template to.
In the Template drop-down menu, select the template.

Select the SM(s) you want to apply the template to and then click "Apply Configuration to x device(s)", this will send down the template and enable all the frequencies and channel bandwidths for scanning on the SMs you have selected.

template-use-01.jpg
template-use-01.jpg1920Ă—1080 144 KB

Additionally, you can apply this template during onboarding of the device in cnMaestro, To do this, before approving the device to be OnBoarded into cnMaestro, click the "Configure Device" button on the SM and select the template from the pulldown list and then click "Save", this will apply the template to the SM during the OnBoarding process.

template-use-02.jpg
template-use-02.jpg1920Ă—1080 135 KB


Evan,

PMP450-SM-CBRS-Freq-v0.3.zip (580 Bytes)

6 Likes
2

Please post here if you find this useful.

2 Likes
3

Thanks for putting this out.  I ended up creating my own already.  The difference I didn't add the 15MHz option as I don't believe that the SAS's will authorize 5MHz channels.  Here's the template I used if it helps

{
	"userParameters": {
                 "radioConfig": {
                 "customFrequencies": [
			    3555000,
                            3557500,
                            3560000,
                            3562500,
                            3565000,
                            3567500,
                            3570000,
                            3572500,
                            3575000,
                            3577500,
                            3580000,
                            3582500,
                            3585000,
                            3587500,
                            3590000,
                            3592500,
                            3595000,
                            3597500,
                            3600000,
                            3602500,
                            3605000,
                            3607500,
                            3610000,
                            3612500,
                            3615000,
                            3617500,
                            3620000,
                            3622500,
                            3625000,
                            3627500,
                            3630000,
                            3632500,
                            3635000,
                            3637500,
                            3640000,
                            3642500,
                            3645000,
                            3647500,
                            3650000,
                            3652500,
                            3655000,
                            3657500,
                            3660000,
                            3662500,
                            3665000,
                            3667500,
                            3670000,
                            3672500,
                            3675000,
                            3677500,
                            3680000,
                            3682500,
                            3685000,
                            3687500,
                            3690000,
                            3692500,
                            3695000,
                            3697500
                            ]
                          },
		"smRadioConfig": {
			"powerUpMode": 0,
			"frequencyScanList": [
			    3555000,
                            3557500,
                            3560000,
                            3562500,
                            3565000,
                            3567500,
                            3570000,
                            3572500,
                            3575000,
                            3577500,
                            3580000,
                            3582500,
                            3585000,
                            3587500,
                            3590000,
                            3592500,
                            3595000,
                            3597500,
                            3600000,
                            3602500,
                            3605000,
                            3607500,
                            3610000,
                            3612500,
                            3615000,
                            3617500,
                            3620000,
                            3622500,
                            3625000,
                            3627500,
                            3630000,
                            3632500,
                            3635000,
                            3637500,
                            3640000,
                            3642500,
                            3645000,
                            3647500,
                            3650000,
                            3652500,
                            3655000,
                            3657500,
                            3660000,
                            3662500,
                            3665000,
                            3667500,
                            3670000,
                            3672500,
                            3675000,
                            3677500,
                            3680000,
                            3682500,
                            3685000,
                            3687500,
                            3690000,
                            3692500,
                            3695000,
                            3697500
			],
			"maxTxPowerEnable": 0,
			"apSelection": 1,
			"maxTxPower": 25,
			"bandwidthScanList": [
                                100,
				200,
                                300,
                                400
			]
		}
	}
}
3 Likes
4

MSImax,
The SASs can actually issue a 15MHz Channel Bandwidth request.

They will issue a half channel next to a 10MHz center frequency, i.e: 3557.5MHz, 3562.5Mhz, 3567.5MHz, etc

5

This behavior, however, may vary by SAS Administrator (i.e. Federated Wireless may make a different assignment than Google or CommScope). Further, they may calculate interference (once the coexistence measures are taken into account) with this choice.

I tend to fall into the camp that you want to stick to 10 MHz channel raster in CBRS.

1 Like
6

This document helped me a lot after Vernon pointed me toward it. Does anyone know if the Color Code on the SMs make any difference? I am merging two sectors into one, and of course they have different color codes. Will they be able to find their new AP without specifying what color codes to scan for?

1 Like
7

RP1:
The SMs that are moving to the new AP will need to have the new color code added to connect to the new AP.

I made the following template for use in cnMaestro for a similar situation.
This template has two variables in it that will set the new primary color code (${New_Color_Code}) and one to put the original color code as a secondary (${Old_Color_Code}) as a fall back.

**Be aware that when moving the SMs between APs, they will perform a re-registration and request a new grant. If you are in an area that requires devices to go through CPAS, this could cause a loss of service.

{
  "userParameters": {
    "smRadioConfig": {
      "colorCodeList": [
        {
          "colorCode": ${New_Color_Code},
          "priority": 1
        },
        {
          "colorCode": ${Old_Color_Code},
          "priority": 2
        }
      ]
    }
  },
 "cfgUtcTimestamp": "2020-06-19T00:00:00Z",
    "configFileParameters": {
        "rebootIfRequired": true,
        "setToDefaults": false
    },
    "cfgFileString": "Canopy configuration file",
    "cfgFileVersion": "1.0"
}

PMP450-SM-Color-Code-v0.1.zip (411 Bytes)

8

Thanks, Evan. I’ll give it a try tonight on two different cuts and let you know how it goes!

9

OK, apparently I have done something wrong–I have attached two .jpgs. I simply replaced the markers that read New_Color_Code and Old_Color_Code with the values 1 for New Color and 5 for Old. Guess I don’t understand how to modify .json files or sumthin’?

Hmmm, well, I can’t find a place to attach the screenshots–OK, so the error message I got when I try to add the template to a selection of SMs is:

“Error: Please configure replacement variables. If variables do not have default values, then device values are mandatory.”

I’m sure I’m overlooking something very obvious–can you assist?

10

To attach a screenshot in your reply, click the “upload” button… (looks like a PC with an UP arrow).

Regarding your actual question, I will ask Evan to take a look.

11

(You can also copy and paste images directly into the composer window)

12

OK, thanks! I’ve attached the two

SM-ColorCodeMod-Fail
SM-ColorCodeMod-Fail1920Ă—1080 311 KB
ColorCodeMod
ColorCodeMod1920Ă—924 169 KB
.jpgs.

13

RP1:
To see the variable options for the template you can click on the “View Variables” and to set the variables you will see a little “Gear” logo over on the right-hand side

Color-Code-Var-01
Color-Code-Var-011417Ă—1007 170 KB

Color-Code-Var-02
Color-Code-Var-021419Ă—1011 134 KB

You will need to configure the “Old_Color_Code” and the “New_Color_Code” variables for each device

Color-Code-Var-03
Color-Code-Var-031414Ă—1004 147 KB

Once this is set for each device and saved, it will push the configured variables down to the SM.

Alternatively, you can remove the variable altogether and replace the ${New_Color_Code} with the new color code number and ${Old_Color_Code} with the old color code number like this:
image

Regards
Evan,

14

OK, I see the syntax error now. Thanks. I’ll give it a try tonight on a cut.

1 Like
16

Interesting. When I attended the PAL launch Webinar this week I took away that we should assign with a 10 MHz block raster. should I build the template without the 5 MHz frequencies listed (Eg. 3557500 etc.) and the 5 MHz box unchecked?

17

On our SMs we are currently scanning just “10 and 20mhz” and “3555000 through 3695000” in 5mhz steps. Is there a reason we should scan everything as listed above? I just see the SM taking a long time to scan and lock on too an AP with this large a number of channels and bandwidths to scan.

18

Sorry for the late reply. It’s true that you do not need to scan bandwidths wider than what your AP is currently configured for. It’s also true that if you followed Cambium’s recommendation of making sure your band edges align to a 10MHz raster, there is no reason to to scan every 2.5MHz. 5MHz scan intervals are sufficient. In terms of scanning a wider range than the 40MHz range you are currently scanning, there is 1 advantage to expanding this. If you are terminated off of your current channel due to a PAL activation by a PAL license owner, your 20.2 or 20.2.1 AP will hunt for another channel. It might find a channel outside of the 40MHz range you’ve configured your SM’s to scan for.

19

Just to be clear, what is the recommendation for channels to add to the custom list?

Option 1:
3555000,
3565000,
3575000,
3585000,
3595000,
3605000,
3615000,
3625000,
3635000,
3645000,
3655000,
3665000,
3675000,
3685000,
3695000

Option 2:
3555000,
3560000,
3565000,
3570000,
3575000,
3580000,
3585000,
3590000,
3595000,
3600000,
3605000,
3610000,
3615000,
3620000,
3625000,
3630000,
3635000,
3640000,
3645000,
3650000,
3655000,
3660000,
3665000,
3670000,
3675000,
3680000,
3685000,
3690000,
3695000

20

Option 2 is a good selection