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Service specific load management
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content Introduction Benefits Feature Description Network Requirements
New Parameters New Counters and Events Network Impact SSLM Test Scope Summary
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content Introduction Benefits Feature Description Network Requirements
New Parameters New Counters and Events Network Impact SSLM Test Scope Summary
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Introduction In a Load Management Context
The feature introduces enhanced control of the UE selection process for inter-frequency load balancing and IRAT offload to WCDMA. UE selection for Load Balancing action is based on UE services (QCI) Load measurement Determine traffic load in each individual cell UE selection for load balancing action Determine and offload suitable UEs Load information exchange Request and exchange load information between cells Load balancing action magnitude Determine the amount of offloading needed to balance load
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content Introduction Benefits Feature Description Network Requirements
New Parameters New Counters and Events Network Impact SSLM Test Scope Summary
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Benefits benefits of sSLM
The feature allows the operator to control how users are selected for load management action based on used service(s) Possibility to require better (target) coverage for users with a certain service (e.g. VoIP) to qualify for load-triggered Similar support is available for coverage-triggered mobility as of L12A Possibility to inhibit users with a certain service (e.g. VoIP) from load-triggered handovers to a higher E-UTRAN frequency Possibility to inhibit users with a certain service (e.g. VoIP) from load-triggered handovers to a UTRAN frequency Possibility to require that a user has a certain service (e.g. VoIP) in order to qualify for load-triggered handovers to a UTRAN frequency
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content Introduction Benefits Feature Description Network Requirements
New Parameters New Counters and Events Network Impact SSLM Test Scope Summary
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Feature Description SSLM new functionality in L14A
Possibility to apply an offset to the A4/B1 (IFLB/IRAT Offload threshold) depending on QCI (new in L14A) Configurable offset per (frequency relation, QCI) If a user has several bearers, the bearer which QCI has largest offset will apply Possibility to exclude UEs from load balancing depending on QCI Configurable per (frequency relation, QCI) A QCI can be configured as forbidden from load-triggered handover A QCI can be configured as required for load-triggered handover (new in L14A) If more than one QCI is configured as required then a user with at least one required QCI is qualified for load-triggered handover In case of conflict, forbidden overrides required By default a QCI is allowed for load-triggered handover Such a QCI will not inhibit a load-triggered handover for a user with the QCI (it is neither forbidden nor required)
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Feature Description SSLM voip example
Note that only load relations from one cell are illustrated Frequency Distance UTRAN cell E-UTRAN cells VoIP users are completely inhibited from IRAT offload to the UTRAN frequency The A4 threshold (required to qualify for load balancing action) for VoIP users is 3 dB higher to the higher E-UTRAN frequency No specific constraints for VoIP users to the lower E-UTRAN frequency
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Feature Description mom structure
Impact on Parameters
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content Introduction Benefits Feature Description Network Requirements
New Parameters New Counters and Events Network Impact SSLM Test Scope Summary
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Network requirements SSLM part of LM features
As a prerequisite at least one of the following features shall be enabled and Operable. FAJ (Inter-frequency Load Balancing) L12B FAJ (IRAT Offload to WCDMA) L13B FAJ (Inter-frequency Offload) L14A
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content Introduction Benefits Feature Description Network Requirements
New Parameters New Counters and Events Network Impact SSLM Test Scope Summary
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NEW PARAMETERS INTRODUCED PARAMETERS
MO Level Parameter name Description Range E// Default EUtranFreqRelation lbA4ThresholdRsrpOffset QCI specific offset for the absolute threshold a4ThresholdRsrp used for load management Unit: 1 dB 0..24 lbQciProfileHandling Specifies QCI profile handling with regard to load management ALLOWED, FORBIDDEN, REQUIRED ALLOWED qciProfileRef Refers to the QCI profile MO, QciProfilePredefined or QciProfileOperatorDefined. N/A NA UtranFreqRelation lbUtranB1ThresholdRscpOffset QCI specific offset to the threshold b1ThresholdRscp used for load management Unit: 1 dB EUTRAN UTRAN
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content Introduction Benefits Feature Description Network Requirements
New Parameters New Counters and Events Network Impact SSLM Test Scope Summary
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New counters & events SSLM observability
No new counters are introduced in this feature. No new pmEvents are introduced. The following existing events are reused. MO Counter name Description Existing/New/ Level Modified EUtranFreqRelation pmLbMeasuredUe Records the number of UEs selected for measurements qualifying for load balancing action towards cells on the related frequency Existing UtranFreqRelation pmLbQualifiedUe Records the number of UEs qualified for load balancing action towards the related cell. Event Event Parameter Description INTERNAL_EVENT_LB_MEAS_UE EVENT_PARAM_FREQ Target frequency EVENT_PARAM_NR_OF_UES Number of UE that are selected to perform event A4 measurement on one target frequency INTERNAL_EVENT_LB_QUAL_UE EVENT_PARAM_NEIGHBOR_CGI CGI of neighbor target cells for which UE fulfilled event A4 criteria Number of UE that fulfilled event A4 criteria
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content Introduction Benefits Feature Description Network Requirements
New Parameters New Counters and Events Network Impact SSLM Test Scope Summary
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Network impact No impact is expected from this feature
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content Introduction Benefits Feature Description Network Requirements
New Parameters New Counters and Events Network Impact SSLM Test Scope Summary
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SSLM test scope test cases
Assumptions: All test cases are executed with the following configuration: All test cases are executed with 700MHz and 2100MHz band, not other band unless specifically specified in individual test cases. All test cases are executed with 10MHz bandwidth by default unless explicitly stated by individual test cases SSLM Test scope was divided in the following groups Feature Activation Mobility
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sslm test cases Test Type TC Number Test Descriptions Lab/Field
Feature Activation SSLM_01 Demonstrate the license handling and feature activation for Service specific load Management: ServiceSpecificLoadMgmt. Lab MOBILITY SSLM_02 Verify IFLB for UE with REQUIRED QCI1 SSLM_03 Verify IFLB for UE with QCI1 REQUIRED with additional lbA4ThresholdRsrpOffset SSLM_04 Verify IFLB for UEs with QCI1 FORBIDDEN, QC5 ALLOWED, QCI8 REQUIRED SSLM_05 Verify IROW for UE with REQUIRED QCI8 and QCI FORBIDDEN SSLM_06 Verify IROW for UE with REQUIRED QCI8 with additional lbUtranB1ThresholdRscpOffset
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sslm_IFLB_03 Verify IFLB for UE with REQUIRED QCI1 with additional lbA4ThresholdRsrpOffset Objective: To verify that UE with QCI1 is qualified for load balanced when the target measured cell has a better coverage i.e a4ThresholdRsrp + lbA4ThresholdRsrpOffset on QCI1 Parameter Settings: Pass/Fail Criteria: UE remains on source cell until VoLTE call is placed and target cell RSRP exceeds the total threshold (rsrp+offset) then UE moves to target cell. MO Parameters GS value Test Value Serving Cell eutranFreqToQciProfileRelation,QciProfilePredefined=qci1 lbQciProfileHandling Required lbA4ThresholdRsrpOffset 3 eutranFreqToQciProfileRelation,QciProfilePredefined=qci5 Allowed eutranFreqToQciProfileRelation,QciProfilePredefined=qci8 QciProfilePredefined qciSubscriptionQuanta QCI 1:50 500 QCI 5:2 QCI 8:100 LoadBalancingFunction lbCeiling 200 lbThreshold 30 ReportConfigEUtraInterFreqLb hysteresisA4 10 a4ThresholdRsrp -106 -90 EutranCellRelation loadBalancing 0 (Not Allowed) 1 (Allowed) Neighbor Cell EUtranCellFDD cellSubscriptionCapacity 20000
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sslm_IFLB_04 Verify IFLB for UEs with QCI1 forbidden, QCI5 Allowed & QCI8 Required Objective: Verify IFLB for UEs with QCI1 FORBIDDEN, QC5 ALLOWED, QCI8 REQUIRED Parameter Settings: Pass/Fail Criteria: UE remains on source cell until VoLTE call is terminated then UE moves to target cell. MO Parameters GS value Test Value Serving Cell EUtranCellFDD cellSubscriptionCapacity 10000 eutranFreqToQciProfileRelation,QciProfilePredefined=qci1 lbQciProfileHandling Forbidden eutranFreqToQciProfileRelation,QciProfilePredefined=qci5 Allowed eutranFreqToQciProfileRelation,QciProfilePredefined=qci8 Required QciProfilePredefined qciSubscriptionQuanta QCI 1:50 500 QCI 5:2 QCI 8:100 LoadBalancingFunction lbCeiling 200 lbThreshold 30 ReportConfigEUtraInterFreqLb hysteresisA4 10 a4ThresholdRsrp -106 -90 EutranCellRelation loadBalancing 0 (Not Allowed) 1 (Allowed) Neighbor Cell 20000
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SSLM_IROW_06 Verify IROW for UE with REQUIRED QCI8 with additional lbUtranB1ThresholdRscpOffset Objective: To verify that UEs with QCI8 is qualified for offload when the target cell has a better coverage i.e B1Rscp + B1RscpOffset on QCI8 Parameter Settings: Pass/Fail Criteria: When target cell reaches B1 threshold + B1 offset UE will be moved to the target cell. MO Parameters GS Value Test Value Serving Cell EUtranCellFDD lbUtranOffloadThreshold 1 ExternalUtranCellFDD lbUtranCellOffloadCapacity 20000 LoadBalancingFunction lbUtranOffloadBackoffTime 60 cellSubscriptionCapacity 10000 3000 eutranFreqToQciProfileRelation,QciProfilePredefined=qci8 lbQciProfileHandling Required lbUtranB1ThresholdRscpOffset 5 QciProfilePredefined qciSubscriptionQuanta QCI 1:50 500 QCI 5:2 QCI 8:100 lbCeiling 200 lbThreshold 30 UtranCellRelation isHoAllowed false true ReportConfigInterLb UtranB1ThresholdRscp -100 loadBalancing 2 (OFFLOAD)
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content Introduction Benefits Feature Description Network Requirements
New Parameters New Counters and Events Network Impact SSLM Test Scope Summary
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summary The feature is an add-on to features Inter-frequency Load Balancing, Inter-RAT Offload to WCDMA and Inter-frequency Offload OSS - CEX “Self Organized Networks” provides support for filtering out cells on a certain source frequency relation towards target frequency and apply the settings to all objects found.
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THANK YOU
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