8.2 Quality Evaluation
9.2.2 Required Information
None
9.2.3 Deployment
9.2.3.1 Requirements
Operating Environment
l UEs must support VoLTE, and the EPC must support IMS. l Operators have deployed the IMS.
Transmission Networking
VoLTE services have high requirements on end-to-end real-time delay. For example, when the transmission delay between the eNodeB and EPC exceeds 20 ms, VoLTE is not appropriate for the eNodeB.
For the requirements on transmission delay and jitter on S1 and X2 interfaces, see IP eRAN
Engineering Guide Feature Parameter Description.
License
None
9.2.3.2 Data Preparation
There are three types of data sources:
l Network plan (negotiation not required): parameter values planned and set by the operator
l Network plan (negotiation required): parameter values planned by the operator and negotiated with the EPC or peer transmission equipment
l User-defined: parameter values set by users
The following table describes the parameter that must be set in the ENodeBAlgoSwitch MO to set the eNodeB voice service switch.
Parameter
Name Parameter ID Data Source Setting Notes
Eutran Voip Support Switch ENodeBAlgoSwitc h.EutranVoipSupp ortSwitch Network plan (negotiation not required)
Set this parameter to ON(On) if you plan to use the VoLTE voice solution.
For details about the deployment suggestion of the VoLTE voice solution, see 9.2.1 When to Use Basic Functions.
The following table describes the parameter that must be set in the GlobalProcSwitch MO to determine whether the eNodeB supports voice mobility.
Parameter
Name Parameter ID Data Source Setting Notes
Protocol Procedure Support Switch GlobalProcSwitch. ProtocolSupportS- witch Network plan (negotiation not required)
If the MME supports the UE Radio Capability Match REQUEST and UE Radio Capability Match RESPONSE messages introduced in 3GPP Release 11, set this parameter to
SupportS1UeCapMatchMsg(Su pportS1UeCapMatchMsg).
The following table describes the parameter that must be set in the ENodeBAlgoSwitch MO to determine whether the eNodeB supports VQM.
Parameter
Name Parameter ID Data Source Setting Notes
Voice quality monitoring algo switch ENodeBAlgoSwitc h.VQMAlgoSwitch Network plan (negotiation not required)
To monitor the voice quality, set this parameter to
VQM_ALGO_SWITCH_ON.
The following table describes the parameter that must be set in the RlcPdcpParaGroup MO to configure the PDCP discard timer.
Parameter
Name Parameter ID Data Source Setting Notes
Discard timer RlcPdcpParaGrou p.DiscardTimer
Network plan (negotiation not required)
If the voice service bearer planning policy specified by operators is QCI 5 multiplexing for carrying voice packets, it is recommended that this parameter for QCI of 5 be set to 150 ms. Otherwise, set this parameter for QCI of 5 to Infinity.
9.2.3.3 Precautions
None9.2.3.4 Hardware Adjustment
None9.2.3.5 Initial Configuration
Using the CME to Perform Batch Configuration for Newly Deployed eNodeBs
Enter the values of the parameters listed in Table 9-2 in a summary data file, which also contains other data for the new eNodeBs to be deployed.
Then, import the summary data file into the Configuration Management Express (CME) for batch configuration.
For detailed instructions, see "Creating eNodeBs in Batches" in the initial configuration guide for the eNodeB, which is available in the eNodeB product documentation. The summary data file may be a scenario-specific file provided by the CME or a customized file, depending on the following conditions:
l The MOs in Table 9-2 are contained in a scenario-specific summary data file. In this situation, set the parameters in the MOs, and then verify and save the file.
l Some MOs in Table 9-2 are not contained in a scenario-specific summary data file. In this situation, customize a summary data file to include the MOs before you can set the parameters.
Table 9-2 Common data
MO Sheet in the Summary
Data File Parameter Group Remarks
ENodeBAlgoS witch
ENodeBAlgoSwitch EutranVoipSupportSwitch User- defined template
MO Sheet in the Summary
Data File Parameter Group Remarks
GlobalProcSwit ch
GlobalProcSwitch ProtocolSupportSwitch User- defined template ENodeBAlgoS
witch
ENodeBAlgoSwitch VQMAlgoSwitch User- defined template RlcPdcpParaGr
oup
RlcPdcpParaGroup DiscardTimer User- defined template
Using the CME to Perform Batch Configuration for Existing eNodeBs
Batch reconfiguration using the CME is the recommended method to activate a feature on existing eNodeBs. This method reconfigures all data, except neighbor relationships, for multiple eNodeBs in a single procedure.
Step 1 The procedure is as follows: After creating a planned data area, choose CME > Advanced >
Customize Summary Data File (U2000 client mode), or choose Advanced > Customize Summary Data File (CME client mode), to customize a summary data file for batch reconfiguration.
NOTE
For context-sensitive help on a current task in the client, press F1.
Step 2 Choose CME > LTE Application > Export Data > Export Base Station Bulk Configuration
Data (U2000 client mode), or choose LTE Application > Export Data > Export Base Station Bulk Configuration Data (CME client mode), to export the eNodeB data stored on the CME into the customized summary data file.
Step 3 In the summary data file, set the parameters in the MOs listed in Table 9-2 and close the file.
Step 4 Choose CME > LTE Application > Import Data > Import Base Station Bulk Configuration
Data (U2000 client mode), or choose LTE Application > Import Data > Import Base Station Bulk Configuration Data (CME client mode), to import the summary data file into the CME, and then start the data verification.
Step 5 After data verification is complete, choose CME > Planned Area > Export Incremental Scripts
(U2000 client mode), or choose Area Management > Planned Area > Export Incremental Scripts (CME client mode), to export and activate the incremental scripts.
----End
Using the CME to Perform Single Configuration
On the CME, set the parameters listed in the 9.4.3.2 Data Preparation section for a single eNodeB. The procedure is as follows:
Step 1 In the planned data area, click Base Station in the upper left corner of the configuration
window.
Step 2 In area 1 shown in Figure 9-1, select the eNodeB to which the MOs belong.
Figure 9-1 MO search and configuration window
Step 3 On the Search tab page in area 2, enter an MO name, for example, CELL. Step 4 In area 3, double-click the MO in the Object Name column.
Step 5 All parameters in this MO are displayed in area 4.
Step 6 Choose CME > Planned Area > Export Incremental Scripts (U2000 client mode), or choose
Area Management > Planned Area > Export Incremental Scripts (CME client mode), to export and activate the incremental scripts.
----End
Using MML Commands
l Run the MOD ENODEBALGOSWITCH command to turn on the
EutranVoipSupportSwitch switch.
l Run the MOD GLOBALPROCSWITCH command and select
SupportS1UeCapMatchMsg.
l Run the MOD ENODEBALGOSWITCH command to turn on the VQMAlgoSwitch.
MML Command Examples
MOD ENODEBALGOSWITCH:EUTRANVOIPSUPPORTSWITCH=ON;
MOD GLOBALPROCSWITCH: ProtocolSupportSwitch=SupportS1UeCapMatchMsg-1; MOD ENODEBALGOSWITCH:VQMALGOSWITCH=VQM_ALGO_SWITCH_ON;
9.2.3.6 Activation Observation
To check whether a UE can perform voice services after the EutranVoipSupportSwitch switch is turned on, perform the following steps:
Step 1 Run the LST ENodeBAlgoSwitch command to check whether the EutranVoipSupportSwitch switch is turned on.
Step 2 Enable a UE to access a cell and perform voice services.
Step 3 View the E-RAB SETUP REQUEST and E-RAB SETUP RESPONSE messages for QCI 5
and QCI 1 in the S1 interface tracing task result on the U2000. Bearers for QCI of 5 and QCI of 1 are successfully set up, as shown in Figure 9-2, Figure 9-3, Figure 9-4, and Figure 9-5.
Figure 9-2 E-RAB SETUP REQUEST (QCI5)
Figure 9-3 E-RAB SETUP RESPONSE (QCI5)
Figure 9-4 E-RAB SETUP REQUEST (QCI1)
Figure 9-5 E-RAB SETUP RESPONSE (QCI1)
Step 4 Check whether the following counters indicate successful voice service setup. Counter
ID Counter Name Counter Description
15267266 69
L.E-
RAB.SuccEst.QC I.1
Number of successful E-RAB setups initiated by UEs for services with the QCI of 1 in a cell
15267266 77
L.E-
RAB.SuccEst.QC I.5
Number of successful E-RAB setups initiated by UEs for services with the QCI of 5 in a cell
Step 5 View the "voice support match indicator" IE in the UE RADIO CAPABILITY MATCH
IE is supported or not supported, the eNodeB can query a UE's capability in supporting VoLTE mobility and report the capability to the MME.
----End
9.2.3.7 Reconfiguration
N/A
9.2.3.8 Deactivation
Using the CME to Perform Batch Configuration
Batch reconfiguration using the CME is the recommended method to deactivate a feature on eNodeBs. This method reconfigures all data, except neighbor relationships, for multiple eNodeBs in a single procedure. The procedure for feature deactivation is similar to that for feature activation described in Using the CME to Perform Batch Configuration for Existing eNodeBs. In the procedure, modify parameters according to Table 9-3.
Table 9-3 Common data
MO Sheet in the Summary
Data File Parameter Group Remarks
ENodeBAlgo Switch ENodeBAlgoSwitch EutranVoipSupportS- witch OFF(Off) GlobalProcS witch
GlobalProcSwitch ProtocolSupportSwitch Deselected ENodeBAlgo
Switch
ENodeBAlgoSwitch VQMAlgoSwitch VQM_ALGO_S WITCH_OFF
Using the CME to Perform Single Configuration
On the CME, set parameters according to the MOs listed in the related tables in each scenario. For detailed instructions, see Using the CME to Perform Single Configuration described for feature activation.
Using MML Commands
l Run the MOD ENODEBALGOSWITCH command to turn off the
EutranVoipSupportSwitch switch.
l Run the MOD GLOBALPROCSWITCH command and clear
SupportS1UeCapMatchMsg.
l Run the MOD ENODEBALGOSWITCH command to turn off the VQMAlgoSwitch.
MML Command Examples
MOD ENODEBALGOSWITCH:EUTRANVOIPSUPPORTSWITCH=OFF;
MOD GLOBALPROCSWITCH: ProtocolSupportSwitch=SupportS1UeCapMatchMsg-0; MOD ENODEBALGOSWITCH:VQMALGOSWITCH=VQM_ALGO_SWITCH_OFF;
9.2.4 Performance Monitoring
After common parameters are deployed, or after both common parameters and the features and functions in Table 9-1 are deployed, you can monitor voice service performance using the following counters.
9.2.4.1 Voice KPIs
E-RAB Setup Success Rate (VoLTE)
Table 9-4 describes the counters used to monitor the E-RAB setup success rates of voice services.
Table 9-4 Counters used to monitor the E-RAB setup success rates of voice services
Counter ID Counter Name Counter Description
1526726668 L.E-RAB.AttEst.QCI.1 Number of E-RAB setup attempts initiated by UEs for services with the QCI of 1 in a cell
1526726676 L.E-RAB.AttEst.QCI.5 Number of E-RAB setup attempts initiated by UEs for services with the QCI of 5 in a cell
1526726669 L.E-RAB.SuccEst.QCI.1 Number of successful E-RAB setups initiated by UEs for services with the QCI of 1 in a cell
1526726677 L.E-RAB.SuccEst.QCI.5 Number of successful E-RAB setups initiated by UEs for services with the QCI of 5 in a cell
1526727853 L.E-
RAB.AttEst.PLMN.QCI.1
Number of E-RAB setup attempts initiated by UEs of a specified operator for services with the QCI of 1 in a cell
1526727861 L.E-
RAB.AttEst.PLMN.QCI.5
Number of E-RAB setup attempts initiated by UEs of a specified operator for services with the QCI of 5 in a cell
1526727854 L.E-
RAB.SuccEst.PLMN.QCI.1
Number of successful E-RAB setups initiated by UEs of a specified operator for services with the QCI of 1 in a cell 1526727862 L.E-
RAB.SuccEst.PLMN.QCI.5
Number of successful E-RAB setups initiated by UEs of a specified operator for services with the QCI of 5 in a cell
E-RAB (QCI 1) setup success rate = L.E-RAB.SuccEst.QCI.1 / L.E-RAB.AttEst.QCI.1 E-RAB (QCI 5) setup success rate = L.E-RAB.SuccEst.QCI.5 / L.E-RAB.AttEst.QCI.5
E-RAB (QCI 1) setup success rate for a specific operator = L.E-RAB.SuccEst.PLMN.QCI.
1 / L.E-RAB.AttEst.PLMN.QCI.1
E-RAB (QCI 5) setup success rate for a specific operator = L.E-RAB.SuccEst.PLMN.QCI.
5 / L.E-RAB.AttEst.PLMN.QCI.5
Handover Success Rate (VoIP)
Table 9-5 describes the counters used to monitor the handover success rates of voice services.
Table 9-5 Counters used to monitor the handover success rates of voice services
Counter ID Counter Name Counter Description
1526729526 L.HHO.IntraeNB.IntraFre q.PrepAttOut.VoIP
Number of intra-eNodeB intra-frequency outgoing handover attempts for UEs performing voice services in a cell 1526729527 L.HHO.IntraeNB.InterFre
q.PrepAttOut.VoIP
Number of intra-eNodeB inter-frequency outgoing handover attempts for UEs performing voice services in a cell 1526729535 L.HHO.IntereNB.IntraFre
q.PrepAttOut.VoIP
Number of inter-eNodeB intra-frequency outgoing handover attempts for UEs performing voice services in a cell 1526729536 L.HHO.IntereNB.InterFreq
.PrepAttOut.VoIP
Number of inter-eNodeB inter-frequency outgoing handover attempts for UEs performing voice services in a cell 1526729537 L.HHO.IntereNB.InterFdd
Tdd.PrepAttOut.VoIP
Number of inter-eNodeB inter-duplex- mode outgoing handover attempts for UEs performing voice services in a cell
1526729529 L.HHO.IntraeNB.IntraFre q.ExecAttOut.VoIP
Number of intra-eNodeB intra-frequency outgoing handover executions for UEs performing voice services in a cell 1526729530 L.HHO.IntraeNB.InterFre
q.ExecAttOut.VoIP
Number of intra-eNodeB inter-frequency outgoing handover executions for UEs performing voice services in a cell 1526729538 L.HHO.IntereNB.IntraFre
q.ExecAttOut.VoIP
Number of inter-eNodeB intra-frequency outgoing handover executions for UEs performing voice services in a cell 1526729539 L.HHO.IntereNB.InterFreq
.ExecAttOut.VoIP
Number of inter-eNodeB inter-frequency outgoing handover executions for UEs performing voice services in a cell 1526729540 L.HHO.IntereNB.InterFdd
Tdd.ExecAttOut.VoIP
Number of inter-eNodeB inter-duplex- mode outgoing handover executions for UEs performing voice services in a cell VoLTE Feature Parameter Description 9 Engineering Guidelines
Counter ID Counter Name Counter Description
1526729532 L.HHO.IntraeNB.IntraFre q.ExecSuccOut.VoIP
Number of successful intra-eNodeB intra- frequency outgoing handovers for UEs performing voice services in a cell 1526729533 L.HHO.IntraeNB.InterFre
q.ExecSuccOut.VoIP
Number of successful intra-eNodeB inter- frequency outgoing handovers for UEs performing voice services in a cell 1526729541 L.HHO.IntereNB.IntraFre
q.ExecSuccOut.VoIP
Number of successful inter-eNodeB intra- frequency outgoing handovers for UEs performing voice services in a cell 1526729542 L.HHO.IntereNB.InterFreq
.ExecSuccOut.VoIP
Number of successful inter-eNodeB inter- frequency outgoing handovers for UEs performing voice services in a cell 1526729543 L.HHO.IntereNB.InterFdd
Tdd.ExecSuccOut.VoIP
Number of successful inter-eNodeB inter- duplex-mode outgoing handovers for UEs performing voice services in a cell 1526729528 L.HHO.IntraeNB.InterFdd
Tdd.PrepAttOut.VoIP
Number of intra-eNodeB inter-duplex- mode outgoing handover attempts for UEs performing voice services in a cell
1526729531 L.HHO.IntraeNB.InterFdd Tdd.ExecAttOut.VoIP
Number of intra-eNodeB inter-duplex- mode outgoing handover executions for UEs performing voice services in a cell 1526729534 L.HHO.IntraeNB.InterFdd
Tdd.ExecSuccOut.VoIP
Number of successful intra-eNodeB inter- duplex-mode outgoing handovers for UEs performing voice services in a cell
Intra-frequency handover success rates of voice services = (L.HHO.IntraeNB.IntraFreq.ExecSuccOut.VoIP +
L.HHO.IntereNB.IntraFreq.ExecSuccOut.VoIP) /
(L.HHO.IntraeNB.IntraFreq.ExecAttOut.VoIP+
L.HHO.IntereNB.IntraFreq.ExecAttOut.VoIP)
Inter-frequency handover success rates of voice services = (L.HHO.IntraeNB.InterFreq.ExecSuccOut.VoIP +
L.HHO.IntereNB.InterFreq.ExecSuccOut.VoIP) /
(L.HHO.IntraeNB.InterFreq.ExecAttOut.VoIP +
L.HHO.IntereNB.InterFreq.ExecAttOut.VoIP)
Inter-mode handover success rates of voice services = (L.HHO.IntraeNB.InterFddTdd.ExecSuccOut.VoIP +
L.HHO.IntereNB.InterFddTdd.ExecSuccOut.VoIP ) /
(L.HHO.IntraeNB.InterFddTdd.ExecAttOut.VoIP +
Call Drop Rate (VoLTE)
Table 9-6 describes the counters used to monitor the call drop rates of voice services.
Table 9-6 Counters used to monitor the call drop rates of voice services Counter
ID Counter Name Counter Description
152672668 6
L.E-
RAB.AbnormRel.Q CI.1
Number of abnormal E-RAB releases for services with the QCI of 1 in a cell
152672669 4
L.E-
RAB.AbnormRel.Q CI.5
Number of abnormal E-RAB releases for services with the QCI of 5 in a cell
152672668 7
L.E-
RAB.NormRel.QCI. 1
Number of normal E-RAB releases for services with the QCI of 1 in a cell
152672669 5
L.E-
RAB.NormRel.QCI. 5
Number of normal E-RAB releases for services with the QCI of 5 in a cell
152672787 1
L.E-
RAB.AbnormRel.P LMN.QCI.1
Number of abnormal releases of activated E-RABs of a specified operator for services with the QCI of 1 in a cell 152672787 9 L.E- RAB.AbnormRel.P LMN.QCI.5
Number of abnormal releases of activated E-RABs of a specified operator for services with the QCI of 5 in a cell 152672787 2 L.E- RAB.NormRel.PLM N.QCI.1
Number of normal E-RAB releases of a specified operator for services with the QCI of 1 in a cell 152672788
0
L.E-
RAB.NormRel.PLM N.QCI.5
Number of normal E-RAB releases of a specified operator for services with the QCI of 5 in a cell
Call drop rate (QCI 1) = L.E-RAB.AbnormRel.QCI.1 /(L.E-RAB.AbnormRel.QCI.1+L.E-
RAB.NormRel.QCI.1)
Call drop rate (QCI 5) = L.E-RAB.AbnormRel.QCI.5 / (L.E-RAB.AbnormRel.QCI.
5+L.E-RAB.NormRel.QCI.5)
Call drop rate (QCI 1) for a specific operator = L.E-RAB.AbnormRel.PLMN.QCI.1 / (L.E-
RAB.AbnormRel.PLMN.QCI.1+L.E-RAB.NormRel.PLMN.QCI.1)
Call drop rate (QCI 5) for a specific operator = L.E-RAB.AbnormRel.PLMN.QCI.5 / (L.E-
RAB.AbnormRel.PLMN.QCI.5+L.E-RAB.NormRel.PLMN.QCI.5)
9.2.4.2 Voice QoS
Packet Loss Rate
Table 9-7 describes the counters used to monitor the uplink and downlink packet loss rate on the Uu interface and the downlink PDCP packet discard rate of voice services.
Table 9-7 Counters used to monitor the packet loss rate Counter
ID Counter Name Counter Description
1526727 961
L.Traffic.UL.PktLoss.Los s.QCI.1
Number of discarded uplink traffic PDCP SDUs for DRB services with the QCI of 1 in a cell 1526727
962
L.Traffic.UL.PktLoss.Tot .QCI.1
Number of expected uplink traffic data packets for DRB services with the QCI of 1 in a cell 1526727
934
L.Traffic.DL.PktUuLoss. Loss.QCI.1
Number of discarded downlink traffic PDCP SDUs for DRB services with the QCI of 1 in a cell over the Uu interface
1526727 935
L.Traffic.DL.PktUuLoss. Tot.QCI.1
Number of transmitted downlink traffic PDCP SDUs for DRB services with the QCI of 1 in a cell over the Uu interface
1526726 833
L.PDCP.Tx.Disc.Trf.SDU .QCI.1
Number of downlink traffic SDUs discarded by the PDCP layer for services with the QCI of 1 in a cell
1526727 889
L.PDCP.Tx.TotRev.Trf.S DU.QCI.1
Number of transmitted downlink traffic PDCP SDUs for services with the QCI of 1 in a cell 1526736
684
L.Traffic.UL.PktLoss.Los s.PLMN.QCI.1
Total number of discarded uplink PDCP SDUs for traffic services with a QCI of 1 for a specific operator in a cell
1526736 686
L.Traffic.UL.PktLoss.Tot .PLMN.QCI.1
Total number of expected uplink data packets for DRB services with a QCI of 1 for a specific operator in a cell
1526736 737
L.Traffic.DL.PktUuLoss. Loss.PLMN.QCI.1
Total number of discarded downlink PDCP SDUs for traffic services with a QCI of 1 for a specific operator in a cell
1526736 739
L.Traffic.DL.PktUuLoss. Tot.PLMN.QCI.1
Total number of expected downlink data packets for DRB services with a QCI of 1 for a specific operator in a cell
1526736 680
L.PDCP.Tx.Disc.Trf.SDU .PLMN.QCI.1
Number of downlink traffic SDUs discarded by the PDCP layer for services with a QCI of 1 for a specific operator in a cell
1526736 682
L.PDCP.Tx.TotRev.Trf.S DU.PLMN.QCI.1
Number of transmitted downlink traffic PDCP SDUs for services with a QCI of 1 for a specific operator in a cell
UL packet discard rate on the Uu interface for QCI 1 = L.Traffic.UL.PktLoss.Loss.QCI.1 /
L.Traffic.UL.PktLoss.Tot.QCI.1
DL packet discard rate on the Uu interface for QCI 1 = L.Traffic.DL.PktUuLoss.Loss.QCI.
1 / L.Traffic.DL.PktUuLoss.Tot.QCI.1
DL PDCP packet discard rate = L.PDCP.Tx.Disc.Trf.SDU.QCI.1 / (L.PDCP.Tx.Disc.Trf.SDU.QCI.1+L.PDCP.Tx.TotRev.Trf.SDU.QCI.1) UL packet discard rate on the Uu interface for QCI 1 of a specific operator =
L.Traffic.UL.PktLoss.Loss.PLMN.QCI.1 / L.Traffic.UL.PktLoss.Tot.PLMN.QCI.1
DL packet discard rate on the Uu interface for QCI 1 of a specific operator =
L.Traffic.DL.PktUuLoss.Loss.PLMN.QCI.1 / L.Traffic.DL.PktUuLoss.Tot.PLMN.QCI.1
DL PDCP packet discard rate for a specific operator =
L.PDCP.Tx.Disc.Trf.SDU.PLMN.QCI.1 / (L.PDCP.Tx.Disc.Trf.SDU.QCI. 1+L.PDCP.Tx.TotRev.Trf.SDU.PLMN.QCI.1)
9.2.4.3 Voice Quality
Table 9-8, Table 9-9, Table 9-10, Table 9-11, and Table 9-12 describe the counters used to monitor the distribution of uplink and downlink voice service QoS.
Table 9-8 Counters with the voice quality being Excellent
Counter ID Counter Name Counter Description