VoLTE Drop Improvement

Guys… Any suggestion for VoLTE Drop Improvement?

I’m having high pegging in UE Lost.

Ericsson network

Layers:
L2500 20 MHz
L2300 10 MHz
L1800 15 MHz

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Which other counters increased with UE lost? Which layer affected most? Do early SRVCC to 3G/2G

Try activating the TTI bundling.
Try increasing the SRVCC threshold by 1-2 dBs.
Try identifying your coverage holes(most likely indoor).
Try playing with out of sync constants for qci1 n310 and n311.

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Could you plz share the name of parameter for Ericsson vendor and threshold ?
thank you

Hi Experts,

What all the parameters we need to tune to improve VoLTE drop in Huawei due to high rssi?

  • TTI bundling
  • RLC segmentation
  • UL ICIC feature on RAN side
  • MRO of SON will also help
  • FSS ( frequency selective scheduling)

Have you tried MRO?

Yes, but no on VoLTE.

MRO will improve HO success rate but may degrade quality indeed.

It depends on many things.

Yes, but how much improvement you seen?

And how much offset you set?

Offset is adjusted by MRO not by me.

I have seen improvement of 1-2% on some cells of HO success rate.

But not on all cells.

Yes, I know.

But we define a step in it, upper and lower range.

If I remember correct it was +/- 2-3 dB.

I tested it like more than 10 years ago, on a Huawei RAN

Vendor was a SON company.

Thanks! :wink: