Counters to detect silent calls for VoLTE and VoNR

5GRNO · August 22, 2021, 3:00am

Hi Experts.
Do we have Counters to detect silent calls for VoLTE and VoNR?

RFSpecialist · August 31, 2021, 7:54pm

Huawei has:

Excellent
Good
Average
Poor
Bad

5GRNO · August 31, 2021, 7:54pm

Not MOS.
Silent call (no voice).

darshanmalde · August 31, 2021, 7:55pm

In Huawei /ZTE VQI - equivalent to MOS.
Ericsson , Nokia – Silent frames counter available.

5GRNO · August 31, 2021, 7:55pm

But these are not silent calls.
These are silent instance during a call when the voice packet lost.

darshanmalde · August 31, 2021, 7:56pm

To identify silent call it is required probes.
We use Anritsu.
Silent frame for how much time? → very important to decide

5GRNO · August 31, 2021, 7:57pm

Yes, so no counters available yet as Ericsson provided in 3G.
In 3G , Ericsson provided was pmsilentcallnb/wb/ul/dl.
Was looking for something similar in VoLTE.

RFSpecialist · August 31, 2021, 7:58pm

Bad is silent call.

5GRNO · August 31, 2021, 7:58pm

You mean: bad could be silent call.

RFSpecialist · August 31, 2021, 7:59pm

Yes, includes silent call.

5GRNO · August 31, 2021, 8:02pm

So, exclusive counter is still not there to exactly check if silent calls started triggering at any level.

chitrangankumar · August 31, 2021, 8:02pm

For VoLTE & VoNR yes.
For Silent call or one way call we have to consider IMS hence E2E formulations required.
MoS comes here but it is different from VQI (air interface only).
If you talk about ericssona and Nokia vendor for this they need to use probe method as mentioned by some body.
That depends uniformity of vendor from RF and IMS both end.
If any of domain has different OEM type as most of them have IMS from Nokia, then 3rd party tool can be used and formula will consider both part from RF + Core.

For Huawei: L.Voice.DL.silent.Num and UL

5GRNO · August 31, 2021, 8:05pm

Yes Thanks, @chitrangankumar. But in Ericsson it’s not exactly silent calls.

chitrangankumar · August 31, 2021, 8:06pm

Yes, you’re right. It is silent time per VoLTE user kpi.
But this is what I got it from Ericsson side.

5GRNO · August 31, 2021, 8:06pm

Thank you all

Conclusion: we don’t have exact counter in VoLTE to detect silent calls.

chitrangankumar · August 31, 2021, 8:07pm

Yes, we can’t have exact counter for silent call but, we can have composite counters!
This is what all oem are using it.

cheikh789 · August 31, 2021, 8:28pm

in Huawei.

L.UECNTX.Rel.eNodeB.CallMute :Number of UE context releases initiated by the eNodeB due to uplink mute calls

L.HHO.IntraCell.CallMute.ExecSuccOut:Number of intra-cell outgoing handover execution attempts due to uplink mute calls in a cell

L.Voice.UL.Silent.Num
L.Voice.DL.Silent.Num

AhmedKenzy · September 6, 2021, 11:42am

How you do it by Anritsu?
This is per IMSI not cell correct?