9.1 When to Use LOFD-081219 UL CoMP Based on Relaxed Backhaul
9.4.5.4 Using the CME to Perform Feature Configuration
Step 1 On the U2000 client, choose CME > Planned Area > Create Planned Area.
Step 2 In the displayed Create Planned Area dialog box, specify Planned area name, select the eNodeB (for which UL CoMP based on relaxed backhaul is to be activated) on the Base Station tab page under Available NEs, and click so that it is added to Selected NEs.
Then, click OK.
NOTE
You can select one or more eNodeBs in this step.
Step 3 Choose CME > Advanced > Feature Operation and Maintenance > Export Feature Commission Data.
Step 4 In the displayed dialog box, set Category to LTE, select LOFD-081219 UL CoMP based on relaxed backhaul, and then click Next.
Step 5 Under Available Base Stations in the dialog box, select the eNodeB whose data is to be exported. Click so that the eNodeB is added to Selected Base Stations. Then, click Next.
Step 6 In the dialog box, set Export as to the format (.xls or .xlsm) in which the exported data is to be saved. Click to the right of Export path to specify the save path. Then, click Next.
Step 7 Wait until the data is exported.
Step 8 Click the hyperlink to the save path. Alternatively, click Finish, and locate the exported file in the save path.
Step 9 Set the non-UL-CoMP parameters suggested in the (eNodeB)comment.html file in the save path, and then set UL CoMP parameters in the UL CoMP data file (for example,
LOFD-081219.xlsm). In the UL CoMP data file, you can click an MO on the Home sheet and set the parameters on the displayed sheet based on the network plan.
Step 10 After setting the parameters, choose CME > Advanced > Feature Operation and Maintenance > Import Feature Commission Data on the U2000 client. In the displayed dialog box, select the UL CoMP data file, and click Next.
Step 11 Wait until the file is imported, as shown in the following figure. Leave the Export incremental script check box selected (default setting). Click Finish.
Step 12 In the displayed dialog box, check that the eNodeB is displayed in the Selected NEs area. Set Encrypt script and Script Executor Operation. You are advised to set Script Executor Operation to Launch script executor and activate exported project so that the script will be executed upon it is loaded. Then, click OK.
Step 13 In the displayed confirmation dialog box, click Yes. Data synchronization starts for the eNodeB. If the Result is Success, UL CoMP based on relaxed backhaul has been activated.
----End
NOTE
After all steps are finished, you can run specific MML commands to verify that the parameter settings take effect.
9.4.5.5 Using MML Commands MML Commands
Step 1 Run the MOD CELLULCOMPALGO command to set a UL CoMP A3 offset.
MOD CELLULCOMPALGO: LocalCellId=0, UlCompA3OffsetForRelaxedBH=-6;
NOTE
The default value is recommended.
Step 2 To activate inter-BBU 2-cell UL CoMP for LOFD-081219 UL CoMP Based on Relaxed Backhaul, run the MOD CELLALGOSWITCH command to turn on the
UlJointReceptionSwitch and UlJointReceptionPhaseIISwitch for each cell involved. Then, run the MOD ENODEBALGOSWITCH command to turn on the UlJROverRelaxedBHSw switch for each eNodeB involved.
2-cell UL CoMP:
MOD CELLALGOSWITCH: LocalCellId=0,
UplinkCompSwitch=UlJointReceptionSwitch-1&UlJointReceptionPhaseIISwitch-1;
MOD ENODEBALGOSWITCH: OverBBUsSwitch=UlJROverRelaxedBHSw-1;
Step 3 To activate inter-BBU 3-cell UL CoMP for LOFD-081219 UL CoMP Based on Relaxed Backhaul, run the MOD CELLALGOSWITCH command to turn on the
UlJointReceptionSwitch, UlJointReceptionPhaseIISwitch, and
UlJointReception3CellSwitch for each cell involved. Then, run the MOD
ENODEBALGOSWITCH command to turn on the UlJROverRelaxedBHSw switch for each eNodeB involved.
3-Cell UL CoMP
MOD CELLALGOSWITCH: LocalCellId=0,
UplinkCompSwitch=UlJointReceptionSwitch-1&UlJointReceptionPhaseIISwitch-1&UlJointR eception3CellSwitch-1;
MOD ENODEBALGOSWITCH: OverBBUsSwitch=UlJROverRelaxedBHSw-1;
Step 4 If the license for LOFD-001048 TTI Bundling has been purchased and activated, run the MOD CELLALGOSWITCH command to turn on the TtiBundlingSwitch for each cell involved.
MOD CELLALGOSWITCH: LocalCellId=0, UlSchSwitch=TtiBundlingSwitch-1;
Step 5 If the license for LOFD-001012 UL Interference Rejection Combining has been purchased and activated, run the MOD CELLALGOSWITCH command to turn on the
MrcIrcAdptSwitch for each cell involved.
MOD CELLALGOSWITCH: LocalCellId=0, PuschIrcAlgoSwitch=MrcIrcAdptSwitch-1;
----End
MML Command Examples
NOTE
The commands for activating UL CoMP need to be executed for each cell involved. The following uses the configuration of one cell as an example.
2-Cell UL CoMP
MOD CELLULCOMPALGO: LocalCellId=0, UlCompA3OffsetForRelaxedBH=-6;
MOD CELLALGOSWITCH: LocalCellId=0,
UplinkCompSwitch=UlJointReceptionSwitch-1&UlJointReceptionPhaseIISwitch-1;
MOD ENODEBALGOSWITCH: OverBBUsSwitch= UlJROverRelaxedBHSw-1;
MOD CELLALGOSWITCH: LocalCellId=0, UlSchSwitch=TtiBundlingSwitch-1;
MOD CELLALGOSWITCH: LocalCellId=0, PuschIrcAlgoSwitch=MrcIrcAdptSwitch-1;
3-Cell UL CoMP
MOD CELLULCOMPALGO: LocalCellId=0, UlCompA3OffsetForRelaxedBH=-6;
MOD CELLALGOSWITCH: LocalCellId=0,
UplinkCompSwitch=UlJointReceptionSwitch-1&UlJointReceptionPhaseIISwitch-1&UlJointR eception3CellSwitch-1;
MOD ENODEBALGOSWITCH: OverBBUsSwitch= UlJROverRelaxedBHSw-1;
MOD CELLALGOSWITCH: LocalCellId=0, UlSchSwitch=TtiBundlingSwitch-1;
MOD CELLALGOSWITCH: LocalCellId=0, PuschIrcAlgoSwitch=MrcIrcAdptSwitch-1;
9.4.6 Activation Observation
9.4.6.1 Using MML Commands
Run the DSP CELLULCOMPCLUSTER command to query the coordinated cell list of one cell or the coordinated cell lists of all cells of the eNodeB. The command output contains the
eNodeB IDs and local cell IDs of coordinated cells. If a coordinated cell list contains cells with different eNodeB IDs, the feature has been activated.
9.4.6.2 Using Counters
If there are UEs that meet the feature activation requirements, you can use the counters L.ChMeas.ULRelaxedBHCoMP.PRB.Avg (ID: 1526737762) and
L.ULCoMP.ULRelaxedBHCoMP.User.Avg (ID: 1526737763) to check whether the feature has been activated. If the value of any of the counters is not 0, this feature has been activated.
9.4.7 Reconfiguration
N/A
9.4.8 Deactivation
9.4.8.1 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 9.4.5.2 Using the CME to Perform Batch Configuration for Existing eNodeBs. In the procedure, modify parameters according to the following table.
Table 9-5 Parameters related to deactivation of LOFD-070223 UL CoMP Based on Coordinated BBU
MO Sheet in the
Summary Data File Parameter Group Remarks ENodeBAlgoS
witch
eNodeB Radio Data OverBBUsSwitch User-defined sheet
9.4.8.2 Using the CME to Perform Single Configuration
On the CME, set parameters according to 9.4.8.1 Using the CME to Perform Batch Configuration. For detailed instructions, see 9.4.5.3 Using the CME to Perform Single Configuration described for feature activation.
9.4.8.3 Using MML Commands MML Commands
l To deactivate 3-cell UL CoMP, run the MOD CELLALGOSWITCH command to turn off the UlJointReception3CellSwitch for each cell involved.
MOD CELLALGOSWITCH: LocalCellId=0,
UplinkCompSwitch=UlJointReception3CellSwitch-0;
l To deactivate LOFD-081219 UL CoMP Based on Relaxed Backhaul, run the MOD ENODEBALGOSWITCH command to turn off the UlJROverRelaxedBHSw for each eNodeB involved.
MOD ENODEBALGOSWITCH: OverBBUsSwitch=UlJROverRelaxedBHSw-0;
MML Command Examples
NOTE
To deactivate one type of UL CoMP, the corresponding command needs to be executed for each cell or eNodeB involved. The following uses the configurations of one cell and one eNodeB as an example.
l Deactivating 3-cell UL CoMP
MOD CELLALGOSWITCH: LocalCellId=0,
UplinkCompSwitch=UlJointReception3CellSwitch-0;
l Deactivating LOFD-081219 UL CoMP Based on Relaxed Backhaul
MOD ENODEBALGOSWITCH: OverBBUsSwitch=UlJROverRelaxedBHSw-0;
9.5 Performance Monitoring
After this feature is activated, you can use the following counters for monitoring.
Table 9-6 Counters related to this feature
Counter Expected Result
L.Traffic.UL.PktLoss.Loss.QCI.1 L.Traffic.UL.PktLoss.Tot.QCI.1
After UL CoMP based on relaxed backhaul takes effect, the IBLER and uplink packet loss rate of QCI 1 services decrease.
Uplink packet loss rate for QCI 1 services = L.Traffic.UL.PktLoss.Loss.QCI.1/
L.Traffic.UL.PktLoss.Tot.QCI.1 where
l L.Traffic.UL.PktLoss.Loss.QCI.1: Number of lost uplink PDCP SDUs for services carried on DRBs with a QCI of 1 in a cell
l L.Traffic.UL.PktLoss.Tot.QCI.1: Number of expected uplink PDCP SDUs for services carried on DRBs with a QCI of 1 in a cell
L.ULCoMP.ULRelaxedBHCoMP.U ser.Avg
L.ChMeas.ULRelaxedBHCoMP.PR B.Avg
The more the number of UEs and PRBs available for UL CoMP based on relaxed backhaul, the higher the gains.
Monitoring the packet loss rate for QCI 1 services The following table describes the required counters.
Counter ID Counter Name Counter Description
1526727961 L.Traffic.UL.PktLoss.Loss.QCI.1 Number of lost uplink PDCP SDUs for services carried on DRBs with a QCI of 1 in a cell
Counter ID Counter Name Counter Description
1526727962 L.Traffic.UL.PktLoss.Tot.QCI.1 Number of expected uplink PDCP SDUs for services carried on DRBs with a QCI of 1 in a cell
Monitoring the number of UL CoMP UEs and PUSCH PRBs The following table describes the required counters.
Counter ID Counter Name Counter Description
1526737763 L.ULCoMP.ULRelaxedBHCoMP.
User.Avg
Average number of UEs selected for UL CoMP based on relaxed backhaul in a cell
1526737762 L.ChMeas.ULRelaxedBHCoMP.P RB.Avg
Average number of PRBs selected for UL CoMP based on relaxed backhaul
9.6 Parameter Optimization
When LOFD-081219 UL CoMP Based on Relaxed Backhaul is enabled, its performance is affected if intra-frequency neighboring cells have a PCI conflict. You are advised to turn on the PCI conflict alarm switch so that PCI collision or confusion can be reported. The command for turning on the switch is as follows:
MOD ENODEBALGOSWITCH: PciConflictAlmSwitch=ON;
9.7 Troubleshooting
Fault Description
After LOFD-081219 UL CoMP Based on Relaxed Backhaul is enabled, the uplink throughput of CEUs in a cell does not increase under the same conditions as before this feature is
enabled.
After LOFD-081219 UL CoMP Based on Relaxed Backhaul is enabled in the whole network, the values of counters L.ULCoMP.User.Avg (ID: 1526728338), L.ULCoMP.User.Max (ID:
1526728339), and L.ULCoMP.RB (ID: 1526728340) of some or all cells remain 0.
Fault Handling
Step 1 Check related alarms, for example, an alarm that indicates the capacity of a cell decreases. If there is such an alarm, handle the alarm according to the instructions in eNodeB Alarm Reference. If there is not such alarm, go to Step 2.
Step 2 Run the LST CELLALGOSWITCH and LST ENODEBALGOSWITCH commands to check the UlJointReceptionSwitch, UlJointReceptionPhaseIISwitch,
UlJROverRelaxedBHSw, and TtiBundlingSwitch settings. If any switch is turned off, turn it on and end the troubleshooting. If all switches are turned on, go to Step 3.
Step 3 Run the DSP LICINFO command to check the Actual Used values of licenses Intra-eNodeB UL CoMP(FDD), Intra-Intra-eNodeB UL CoMP Phase II(FDD), and UL CoMP based on Relaxed Backhaul(FDD).
l If the Actual Used value of Intra-eNodeB UL CoMP(FDD) is 0, go to Step 4 and Step 5.
l If the Actual Used value of Intra-eNodeB UL CoMP(FDD) is not 0:
– If the Actual Used value of neither Intra-eNodeB UL CoMP Phase II(FDD) nor UL CoMP based on Relaxed Backhaul(FDD) is 0, go to Step 6 and Step 7.
– If the Actual Used value of Intra-eNodeB UL CoMP Phase II(FDD) or UL CoMP based on Relaxed Backhaul(FDD) is 0, go to Step 8.
Step 4 Modify eNodeB configurations if they do not meet the UL CoMP deployment requirements.
Step 5 Check whether the cells are configured with mutually exclusive features described in 4.5 Features Related to LOFD-081219 UL CoMP Based on Relaxed Backhaul. If yes, end the troubleshooting. Otherwise, go to Step 8.
Step 6 Run the DSP CELLULCOMPCLUSTER command to check the coordinated cell list. If there are coordinated cells, go to Step 7. Otherwise, go to Step 8.
Step 7 Check whether the cells selected for UL CoMP meet the requirements for the operating environment. If the cells do not, end the troubleshooting. If the cells do, go to Step 8.
Step 8 Contact Huawei technical support.
----End
10 Parameters
Table 10-1 Parameters
MO Parame
Indicates whether to enable inter-BBU coordinating algorithms. This parameter consists of the following switches:
UlJointReceptionOverBBUsSwitch:
Indicates whether to enable uplink coordinated multi-point (UL CoMP) between cells established on BBPs in different BBUs. This function is enabled only when this switch is on.
FreqCfgCaOverBBUsSwitch:
Indicates whether to enable inter-BBU carrier
aggregation (CA) in scenarios where CA is configured based on frequencies. Inter-BBU CA is enabled in the preceding scenarios only when this switch is on. This switch takes effect only when FreqCfgSwitch of the CaAlgoSwitch parameter in the ENodeBAlgoSwitch MO is on. Inter-BBU CA is enabled only when this switch is on.
UlJROverRelaxedBHSw: Indicates whether to enable the relaxed-backhaul-based inter-BBU coordinating algorithm.
UlJROverRelaxedBHSw:
Indicates whether to enable uplink coordinated multi-point (UL CoMP) between cells established on BBPs in different BBUs. This function is enabled only when this switch is on.
MO Parame
UlSfnJROverBBUsSwitch: Indicates whether to enable UL CoMP in inter-BBU SFN cells.
UlSfnJROverBBUsSwitch:
UL CoMP is enabled in inter-BBU SFN cells only when this switch is on. This switch applies to LTE TDD only.
GUI Value Range: UlJointReceptionOverBBUsS-witch(UlJointReceptionOverBBUsSwitch),
Actual Value Range: UlJointReceptionOverBBUsS-witch, FreqCfgCaOverBBUsSUlJointReceptionOverBBUsS-witch,
UlJROverRelaxedBHSw, UlSfnJROverBBUsSwitch Default Value: UlJointReceptionOverBBUsS-witch:Off, FreqCfgCaOverBBUsSUlJointReceptionOverBBUsS-witch:Off, UlJROverRelaxedBHSw:Off, UlSfnJROverBBUsS-witch:Off
MO Parame
ter ID MML Comma nd
Feature
ID Feature
Name Description
CellUlC ompAlg o
UlComp A3Offse tForRela xedBH
MOD CELLU LCOMP ALGO LST CELLU LCOMP ALGO
LOFD-0 81219
UL CoMP based on relaxed backhau l
Meaning: Indicates the offset for reporting the UL CoMP event. This offset is the difference between the signal quality of a neighboring cell and that of the serving cell. A larger value indicates that a neighboring cell must have better quality for the reporting of the event. For details, see 3GPP TS 36.331.
GUI Value Range: -30~30 Unit: 0.5dB
Actual Value Range: -15~15 Default Value: -6
MO Parame
Indicates whether to enable Uplink Coordinated Multiple Points Reception (UL CoMP) for a cell.
If all of UlJointReceptionSwitch, UlJointReception-PhaseIISwitch, UlJointReception3CellSwitch, and UlHetnetJointReceptionSwitch of this parameter are off, UL CoMP is disabled.
If UlJointReceptionSwitch is on, UlJointReception-PhaseIISwitch is off, UlJointReception3CellSwitch is off, and UlHetnetJointReceptionSwitch is off, intra-site UL CoMP is enabled, and each UE supports UL CoMP in at most two cells.
If UlJointReceptionSwitch is on, UlJointReception-PhaseIISwitch is on, UlJointReception3CellSwitch is off, and UlHetnetJointReceptionSwitch is off, intra-BBU intra-site and inter-site UL CoMP is enabled in cloud BB scenarios, and each UE supports UL CoMP in at most two cells.
If UlJointReceptionSwitch is on, UlJointReception-PhaseIISwitch is on, UlJointReception3CellSwitch is on, and UlHetnetJointReceptionSwitch is off, intra-BBU intra-site and inter-site UL CoMP is enabled in cloud BB scenarios, and each UE supports UL CoMP in at most three cells.
If UlJointReceptionSwitch is on, UlJointReception-PhaseIISwitch is on, UlJointReception3CellSwitch is off, and UlHetnetJointReceptionSwitch is on, UL CoMP is enabled in HetNet networking, intra-BBU intra-site and inter-site UL CoMP is enabled in cloud BB scenarios, and each UE supports UL CoMP in at most two cells.
If UlJointReceptionSwitch is on, UlJointReception-PhaseIISwitch is on, UlJointReception3CellSwitch is on, and UlHetnetJointReceptionSwitch is on, UL CoMP is enabled in HetNet networking, intra-BBU intra-site and inter-site UL CoMP is enabled in cloud BB scenarios, and each UE supports UL CoMP in at most three cells.
UlCompRollbackSwitch controls whether a CoMP UE is not selected any more in UL CoMP and becomes a non-CoMP UE. If this switch is on, the eNodeB detects signal qualities and interference changes of the serving and coordinating cells of a CoMP UE in real time. If the eNodeB detects that the interference from
MO Parame
signals of UEs in the coordinating cell cannot be mitigated using UL CoMP, the eNodeB no longer selects the CoMP UE in UL CoMP, and the UE becomes a non-CoMP UE. If this switch is off, the eNodeB always selects the CoMP UE in UL CoMP, and the UE will never become a non-CoMP UE. This parameter applies only to cells established on LBBPc boards.
UlJointReception3CellSwitch controls whether three-cell UL CoMP is enabled in the serving three-cell. The coordinating cell cannot know whether itself is involved in three-cell UL CoMP. Assume
UlJointReception3CellSwitch is on for cell A and UlJointReceptionSwitch is on for cell B. Then, three-cell UL CoMP is enabled in three-cell A that acts as the serving cell while three-cell UL CoMP does not need to be enabled in cell B that acts as a coordinating cell.
This switch applies only to FDD cells.
UlHetnetCompManualNcellCfgSw: If this option is deselected, the measurement neighboring cell set of this macro cell or the macro cell to which this micro cell belongs is dynamically obtained. If this option is selected, the measurement neighboring cell set of this macro cell and the macro cell to which this micro cell belongs is manually configured.
UlHetnetCompOnUlRsrpSw: If this option is deselected, the coordinating cell set consisting of macro and micro cells is selected based on the reporting of event A3. If this option is selected, the coordinating cell set consisting of macro cells is selected based on the reporting of event A3, and the coordinating cell set consisting of macro and micro cells is selected based on the measurements of uplink RSRP or based on the reporting of event A3. This option takes effect only when the UlHetnetJointRe-ceptionSwitch option is selected.
GUI Value Range:
UlJointReceptionS-witch(UlJointReceptionSwitch),
MO Parame
ter ID MML Comma nd
Feature
ID Feature
Name Description
UlHetnetCompOnUlRsrpSw(UlHetnetCompOnUlRsr pSw)
Unit: None
Actual Value Range: UlJointReceptionSwitch, UlJointReceptionPhaseIISwitch, UlCompRollbackS-witch, UlJointReception3CellSUlCompRollbackS-witch,
UlHetnetJointReceptionSwitch, UlHetnetCompManualNcellCfgSw, UlHetnetCompOnUlRsrpSw
Default Value: UlJointReceptionSwitch:Off, UlJointReceptionPhaseIISwitch:Off, UlCompRollbackSwitch:On,
UlJointReception3CellSwitch:Off, UlHetnetJointRe-ceptionSwitch:Off, UlHetnetCompManualN-cellCfgSw:Off, UlHetnetCompOnUlRsrpSw:Off
MO Parame
Indicates whether to enable UL CoMP among cells each with the specific number of RX antennas.
Ul1R1RJRSwitch: Indicates whether to enable UL CoMP among cells each with one RX antenna. If this option is selected, UL CoMP is enabled among such cells. You are advised to select this option when the serving cell and coordinating cells are not connected based on relaxed backhaul. If this option is deselected, UL CoMP among such cells is disabled. This option applies only to LTE FDD.
Ul1R2RJRSwitch: Indicates whether to enable UL CoMP among cells each with one RX antenna and cells each with two RX antennas. If this option is selected, UL CoMP among such cells is enabled. You are advised to select this option when the serving cell and coordinating cells are not connected based on relaxed backhaul. If this option is deselected, UL CoMP among such cells is disabled. This option applies only to LTE FDD.
Ul2R8RJRSwitch: Indicates whether to enable UL CoMP among cells each with two RX antennas and cells each with eight RX antennas. If this option is selected, UL CoMP among such cells is enabled. If this option is deselected, UL CoMP among such cells is disabled. This option applies only to LTE TDD cells in cell combination scenarios.
Ul4R8RJRSwitch: Indicates whether to enable UL CoMP among cells each with four RX antennas and cells each with eight RX antennas. If this option is selected, UL CoMP among such cells is enabled. If this option is deselected, UL CoMP among such cells is disabled. This option applies only to LTE TDD.
Ul8R8RJRSwitch: Indicates whether to enable UL
Ul8R8RJRSwitch: Indicates whether to enable UL