This article is about Measurements Related to E-RAB (LTE), E-RAB Setup Failure Measurement and we collected list of counters which shows eRAB fails. After we discussed one by one RF optimization solutions and actions can be taken by RF 4G optimization engineer.
| Counter Name | Counter Description | Optimization Solution |
| L.E-RAB.FailEst.NoRadioRes.VoIP | Insufficient radio resources. | Check RRC Connected user and remaining Resource (PUCCH,SRS and PRB Utilization). Increase connected user license or configure parameter mentioned below. |
| L.E-RAB.FailEst.NoRadioRes.SRS.VoIP | Insufficient SRS resources. | The SrsSubframeRecfSwitch option of SrsAlgoSwitch. |
| L.E-RAB.FailEst.NoRadioRes.PUCCH.VoIP | Insufficient PUCCH resources. | The SriPeriodAdaptive option of PUCCHcfg be selected. |
| L.E-RAB.FailEst.NoRadioRes.Other.VoIP | Insufficiency of other radio resources. | |
| L.E-RAB.FailEst.NoRadioRes.DLThrpLic.VoIP | Insufficient licensed downlink traffic volume. | Expand the capacity of sites whose resources are congested, or increase licensed traffic volume. |
| L.E-RAB.FailEst.NoRadioRes.ULThrpLic.VoIP | Insufficient licensed uplink traffic volume. | Expand the capacity of sites whose resources are congested, or increase licensed traffic volume. |
| L.E-RAB.FailEst.NoRadioRes.DLSatis.VoIP | Low downlink satisfaction rate. | Change the downlink satisfaction rate threshold or deselect the DlSwitch option. |
| L.E-RAB.FailEst.NoRadioRes.ULSatis.VoIP | Low uplink satisfaction rate. | Change the uplink satisfaction rate threshold or deselect the UlSwitch option. |
| L.E-RAB.FailEst.NoRadioRes.CCELimited.ULSatis.VoIP | Low uplink satisfaction rate and insufficient CCE resources. | Expand the capacity of sites whose resources are congested, or enable featuer to reduce CCE utilisation. |
| L.E-RAB.FailEst.NoRadioRes.CCELimited.DLSatis.VoIP | Low downlink satisfaction rate and insufficient CCE resources. | Expand the capacity of sites whose resources are congested, or enable featuer to reduce CCE utilisation. |
| L.E-RAB.FailEst.RNL.VoIP | Number of setup failures of E-RABs for voice services because of faults at the radio network layer. | Optimize RF settings to reduce poorly covered areas Troubleshoot uplink interference. |
| L.E-RAB.FailEst.NoReply.VoIP | No responses from the UE in a cell. | Increase WaitRrcConnSetupCmpTimer SmartPreAllocationSwitch parameter on Select the SrbProbeSchSwitch option. |
| L.E-RAB.FailEst.SecurModeFail.VoIP | Security mode configuration failures. | UE Specific Issue , High Interference Scenario , SecCmpWaitingTimer , UeCapbEnquirySecurityEnhSwitch , ProtocolMsgOptSwitch or UuMessageWaitingTimer. |
| L.E-RAB.FailEst.SRBReset.VoIP | The RLC PDU for an SRB has been retransmitted for the maximum number of times. | Adjust the QRxLevMin parameter value and Increase eNodeBMaxRetxThreshold. |
| L.E-RAB.FailEst.RNL.Other.VoIP | Other reasons at the radio network layer. | |
| L.E-RAB.FailEst.TNL.VoIP | Faults at the transport network layer. | Alarm Check and Raise with O&M Team. |
| L.E-RAB.FailEst.TNL.DLRes.VoIP | Insufficient downlink transport resources. | Alarm Check and Raise with Transmission & O&M Team. |
| L.E-RAB.FailEst.TNL.ULRes.VoIP | Insufficient uplink transport resources. | Alarm Check and Raise with Transmission & O&M Team. |
| L.E-RAB.FailEst.TNL.Other.VoIP | Other reasons at the transport network layer. | Alarm Check and Raise with O&M Team. |
| L.E-RAB.FailEst.MME.VoIP | MME-triggered setup failures. | Raise this with Core Team. |
| L.E-RAB.FailEst.Other.VoIP | Other reasons. | |
| L.E-RAB.FailEst.X2AP.VoIP | Conflicts with X2AP-related procedures. | Priortise ERAB Setup over X2 handover process , GlobalProcSwitch.HoErabConflProcessingStrat / CellHoParaCfg.HoMrDelayTimerQci1. |
| L.E-RAB.FailEst.PoorCover.VoIP | Weak coverage. | CIO , A3offset , Power or Tilt increase to make dominent server. |