Exclude from MU grouping?

Products ePMP
1

What does this feature do ?

Does it only affect downlink or it affects both downlink and uplink ?
I get way less error drops on uplink with it enabled

AP : ePMP 3000 (5.9.2)
SM : ePMP Force 300-25l (5.11.0)

ac34a8a1d753ae9eccf941df7711f9de4f449776_2_690x304
ac34a8a1d753ae9eccf941df7711f9de4f449776_2_690x304690×304 26.3 KB

2

Hello @Atang_Maretele,

I’m glad to hear that the feature is improving your user experience.

To clarify, this feature allows a specific subscriber to be excluded from MU-MIMO grouping in the downlink. It is intended as a fine-tuning mechanism.

There are several important considerations:

  1. When MU-MIMO is triggered, the SM loses the single-user beamforming gain. Depending on the AP chain configuration (4x4 or 8x8), this loss can be up to 6 dB, which may result in the MCS dropping by 2–3 levels.
  2. The grouping algorithm also takes into account the azimuth difference between subscribers. As a result, a given SM may be grouped with a lower-performing partner, which can reduce overall performance.

Therefore, in some cases, performance with MU-MIMO enabled may be lower than without it for a particular SM.

Thank you!

3

Can this be applied via a template? Can you give a template example?

4

Hi @ninedd ,

here you go!

{
    "device_props": {
        "wirelessTDDNotGroupable": "0"
        
    }
}

wirelessTDDNotGroupable	OBJECT-TYPE
	SYNTAX	Integer32 (0|1|2)
	MAX-ACCESS	read-write
	STATUS	current
	DESCRIPTION
		"TDD Not groupable:
			0 - Disable
			1 - Exclude from all grouping
			2 - Exclude from MU3/4 grouping
		Device Allocation: SM"
	DEFVAL  { 0 }
	::= { wirelessDevice 20 }

Thank you!