VoLTE Mute Call Issue

Hello Experts,
We are facing many mute calls and one way audio issues. Can you please highlight the possible areas we need to check to resolve the issue?

Network: NOKIA RAN with HUAWEI MME and IMS.
VoLTE Network.

Check if you are facing frequent Handovers and RRC Reestablishments or LTE Drops.

Packet Loss could be also the cause.

There might be many reasons for the VoLTE Call Muting:

  1. Frequent RLF- Optimize RLF timers (T311,N311,T310,N310)
  2. Check RRC Reestablishment rate. - Should be as low as possible.
  3. Optimize A3 Offset/ TimetoTrigger A3.
  4. Optimize B2 thresholds

Generally VoLTE Mute calls happens during mobility and Weak coverage zones, Try to optimize HOs.

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