CELL TRACES
For Ericsson 4G, we use Celltraces files. Below we describe how each event is detected.
| Name | How to detect? |
| DNS_RSRP_AVG DNS_RSRP_MAX DNS_RSRQ_AVG DNS_RSRQ_MAX |
extracted from RRC message “rrcMeasurementReport” (UL DCCH) |
| DNS_CALL_ACCESS EVT_CALL_ACCESS |
Occurs when a call successfully enters a cell in eNB – can be after either successful incoming handover or successful RRC setup.
detected from Cell Traces event “INTERNAL_PROC_RRC_CONNECTION_SETUP” for RCC_ACCESS; INTERNAL_PROC_HO_EXEC_X2_IN for X2_HO_IN CALL_ACESS; INTERNAL_PROC_HO_EXEC_S1_IN for S1_HO_IN CALL_ACESS; |
| DNS_UE_CONTEXT_RELEASE EVT_UE_CONTEXT_RELEASE | Occurs when eNB shall release UE-related resources. S1AP UE Context Release Request (eNB or MME initiated) or X2AP UE Context Release Request (initiated by target eNB but reported in source eNB/cell).
detected from Cell Traces event “INTERNAL_PROC_UE_CTXT_RELEASE” |
| DNS_CALL_ENDED
EVT_CALL_ENDED |
Occurs when call is terminated. Based on S1AP UE Context Release Request (eNB or MME initiated).
detected from Cell Traces Event: S1_UE_CONTEXT_RELEASE_REQUEST event when the triggering node is ENB. S1_UE_CONTEXT_RELEASE_COMMAND event when the triggering node is MME. |
| DNS_CALL_DROPPED EVT_CALL_DROPPED |
Occurs when call is terminated abnormally. Defined as CALL_ENDED with ABNORMAL call release status.
detected from Cell Traces Event: S1_UE_CONTEXT_RELEASE_REQUEST event when the triggering node is ENB with ReleaseCauses set to ABNORMAL call releases. S1_UE_CONTEXT_RELEASE_COMMAND event when the triggering node is MME with ReleaseCauses set to ABNORMAL call releases. |
| DNS_INCOMING_HO EVT_INCOMING_HO | Occurs when incoming handover is attempted to a cell Refers to any sort of handover: intra-RAT (X2 or S1 based) and inter-RAT (from other technologies, UTRAN to EUTRAN, WiFi to EUTRAN).detected from Cell Traces event “INTERNAL_PROC_HO_PREP_X2_IN”, “INTERNAL_PROC_HO_PREP_S1_IN”, “INTERNAL_PROC_HO_EXEC_X2_IN”, “INTERNAL_PROC_HO_EXEC_S1_IN” |
| DNS_OUTGOING_INTRA_RAT_HO EVT_OUTGOING_INTRA_RAT_HO | Occurs when intra-rat (LTE to LTE) handover is attempted. Refers to any sort fo intra-RAT handovers: intra-eNB, inter-eNB, inter-MME, X2 based, S1 based.detected from Cell Traces event “INTERNAL_PROC_HO_PREP_X2_OUT”, “INTERNAL_PROC_HO_PREP_S1_OUT”, “INTERNAL_PROC_HO_EXEC_X2_OUT”, “INTERNAL_PROC_HO_EXEC_S1_OUT” |
| DNS_OUTGOING_INTER_RAT_HO EVT_OUTGOING_INTER_RAT_HO | Occurs when inter-rat (LTE to OTHER RAT, EUTRAN to UTRAN) handover is attempted. Refers to any sort of inter-RAT handovers.detected from Cell Traces event “INTERNAL_PROC_HO_PREP_X2_OUT”, “INTERNAL_PROC_HO_PREP_S1_OUT”, “INTERNAL_PROC_HO_EXEC_X2_OUT”, “INTERNAL_PROC_HO_EXEC_S1_OUT” With “EVENT_PARAM_SOURCE_OR_TARGET_TYPE” set to Inter-RAT technologies. |
| DNS_ERAB_SETUP EVT_ERAB_SETUP | Occurs when additional non-default and non-signalling dedicated ERAB is set up during a call with QCI = 1 which is related to VoLTE call. It is created together with ERAB_SETUP event if one of the created ERABs has QCI = 1.detected from Cell Traces event “INTERNAL_PROC_ERAB_SETUP” event with QCI==1 in one of the E-RAB to be setup information arrays. |
| DNS_ERAB_RELEASE EVT_ERAB_RELEASE | Occurs when any additional non-default and non-signalling dedicated ERAB are released (can be normal or abnormal release, or handover etc).
detected from Cell Traces event “INTERNAL_PROC_ERAB_RELEASE” |
| DNS_VOICE_ERAB_RELEASE EVT_VOICE_ERAB_RELEASE | Occurs when additional non-default and non-signalling dedicated ERAB with QCI = 1 is released (can be normal or abnormal release, or handover etc). It is created together with ERAB_RELEASE event if one of the created ERABs has QCI = 1.detected from CellTraces event “INTERNAL_PROC_ERAB_RELEASE” event with QCI==1 in one of the E-RAB to be setup information arrays. |
| DNS_LTE_CS_FALLBACK EVT_LTE_CS_FALLBACK |
Occurs when LTE CS Fallback (CSFB) attempt is detected.
detected from CellTraces event “INTERNAL_EVENT_UE_MOBILITY_EVAL” with “EVENT_PARAM_MOBILITY_TRIGGET” set to one of the CSCF triggers; |
| DNS_RRC_CONN_RELEASE EVT_RRC_CONN_RELEASE |
Occurs after RRC CONNECTION RELEASE message.
detected from Cell Traces message “RRC_RRC_CONNECTION_RELEASE event. The event information is parsed from the ASN1 protocol IEs.”
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