Service specific load management

content• Introduction• Benefits• Feature Description• Network Requirements• New Parameters• New Counters and Events• Network Impact• SSLM Test Scope• Summary

content• Introduction• Benefits• Feature Description• Network Requirements• New Parameters• New Counters and Events• Network Impact• SSLM Test Scope• Summary

IntroductionIn 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 measurementDetermine traffic load in each individual cell

UE selection for load balancing actionDetermine and offload suitable UEs

Load information exchangeRequest and exchange load information between cells

Load balancing action magnitudeDetermine the amount of offloading needed to balance load

content• Introduction• Benefits• Feature Description• Network Requirements• New Parameters• New Counters and Events• Network Impact• SSLM Test Scope• Summary

Benefitsbenefits 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

content• Introduction• Benefits• Feature Description• Network Requirements• New Parameters• New Counters and Events• Network Impact• SSLM Test Scope• Summary

Feature DescriptionSSLM 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)

Feature DescriptionSSLM 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

Feature Descriptionmom structure

› Impact on Parameters

content• Introduction• Benefits• Feature Description• Network Requirements• New Parameters• New Counters and Events• Network Impact• SSLM Test Scope• Summary

Network requirementsSSLM part of LM features

› As a prerequisite at least one of the following features shall be enabled and Operable.

› FAJ 121 3009 (Inter-frequency Load Balancing) L12B

› FAJ 121 3048 (IRAT Offload to WCDMA) L13B

› FAJ 121 3061 (Inter-frequency Offload) L14A

content• Introduction• Benefits• Feature Description• Network Requirements• New Parameters• New Counters and Events• Network Impact• SSLM Test Scope• Summary

NEW PARAMETERSINTRODUCED PARAMETERS

MOLevel

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 0

EUtranFreqRelation lbQciProfileHandling Specifies QCI profile handling with regard to load management ALLOWED,FORBIDDEN,REQUIRED

ALLOWED

EUtranFreqRelation 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

0..24 0

UtranFreqRelation lbQciProfileHandling Specifies QCI profile handling with regard to load management ALLOWED,FORBIDDEN,REQUIRED

ALLOWED

UtranFreqRelation qciProfileRef Refers to the QCI profile MO, QciProfilePredefined or QciProfileOperatorDefined.

N/A NA

EUTRAN

UTRAN

content• Introduction• Benefits• Feature Description• Network Requirements• New Parameters• New Counters and Events• Network Impact• SSLM Test Scope• Summary

New counters & eventsSSLM observability

› No new counters are introduced in this feature.

› No new pmEvents are introduced. The following existing events are reused.

Event Event Parameter Description

INTERNAL_EVENT_LB_MEAS_UEEVENT_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_UEEVENT_PARAM_NEIGHBOR_CGI CGI of neighbor target cells for which UE fulfilled event A4

criteria

EVENT_PARAM_NR_OF_UES Number of UE that fulfilled event A4 criteria

MOCounter 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 pmLbMeasuredUe Records the number of UEs selected for measurements qualifying for load balancing action towards cells on the related frequency Existing

EUtranFreqRelation pmLbQualifiedUe Records the number of UEs qualified for load balancing action towards the related cell. Existing

UtranFreqRelation pmLbQualifiedUe Records the number of UEs qualified for load balancing action towards the related cell. Existing

content• Introduction• Benefits• Feature Description• Network Requirements• New Parameters• New Counters and Events• Network Impact• SSLM Test Scope• Summary

Network impact› No impact is expected from this feature

content• Introduction• Benefits• Feature Description• Network Requirements• New Parameters• New Counters and Events• Network Impact• SSLM Test Scope• Summary

SSLM test scopetest 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

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 Lab

MOBILITY SSLM_03 Verify IFLB for UE with QCI1 REQUIRED with additional lbA4ThresholdRsrpOffset Lab

MOBILITY SSLM_04 Verify IFLB for UEs with QCI1 FORBIDDEN, QC5 ALLOWED, QCI8 REQUIRED Lab

MOBILITY SSLM_05 Verify IROW for UE with REQUIRED QCI8 and QCI FORBIDDEN Lab

MOBILITY SSLM_06 Verify IROW for UE with REQUIRED QCI8 with additional lbUtranB1ThresholdRscpOffset Lab

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

eutranFreqToQciProfileRelation,QciProfilePredefined=qci1 lbA4ThresholdRsrpOffset   3

eutranFreqToQciProfileRelation,QciProfilePredefined=qci5 lbQciProfileHandling   Allowed

eutranFreqToQciProfileRelation,QciProfilePredefined=qci8 lbQciProfileHandling   Allowed

QciProfilePredefined qciSubscriptionQuanta

QCI 1:50

500

QCI 5:2

QCI 8:100

LoadBalancingFunction lbCeiling 200 200

LoadBalancingFunction lbThreshold 30 30

ReportConfigEUtraInterFreqLb hysteresisA4 10 10

ReportConfigEUtraInterFreqLb a4ThresholdRsrp -106 -90

EutranCellRelation loadBalancing 0 (Not Allowed) 1 (Allowed)

Neighbor Cell

EUtranCellFDD cellSubscriptionCapacity 20000 20000

QciProfilePredefined qciSubscriptionQuanta

QCI 1:50

500

QCI 5:2

QCI 8:100

EutranCellRelation loadBalancing 0 (Not Allowed) 0 (Not Allowed)

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 10000

eutranFreqToQciProfileRelation,QciProfilePredefined=qci1

lbQciProfileHandling   Forbidden

eutranFreqToQciProfileRelation,QciProfilePredefined=qci5

lbQciProfileHandling   Allowed

eutranFreqToQciProfileRelation,QciProfilePredefined=qci8

lbQciProfileHandling   Required

QciProfilePredefined qciSubscriptionQuanta

QCI 1:50

500

QCI 5:2

QCI 8:100

LoadBalancingFunction lbCeiling 200 200

LoadBalancingFunction lbThreshold 30 30

ReportConfigEUtraInterFreqLb hysteresisA4 10 10

ReportConfigEUtraInterFreqLb a4ThresholdRsrp -106 -90

EutranCellRelation loadBalancing 0 (Not Allowed) 1 (Allowed)

Neighbor Cell

EUtranCellFDD cellSubscriptionCapacity 20000 20000

QciProfilePredefined qciSubscriptionQuanta

QCI 1:50

500

QCI 5:2

QCI 8:100

EutranCellRelation loadBalancing 0 (Not Allowed)0 (Not Allowed)

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

EUtranCellFDD cellSubscriptionCapacity 10000 3000

eutranFreqToQciProfileRelation,QciProfilePredefined=qci8 lbQciProfileHandling   Required

eutranFreqToQciProfileRelation,QciProfilePredefined=qci8lbUtranB1ThresholdRscpOffset   5

QciProfilePredefined qciSubscriptionQuanta

QCI 1:50

500

QCI 5:2

QCI 8:100

LoadBalancingFunction lbCeiling 200 200

LoadBalancingFunction lbThreshold 30 30

UtranCellRelation isHoAllowed false true

ReportConfigInterLb UtranB1ThresholdRscp -100

UtranCellRelation loadBalancing   2 (OFFLOAD)

content• Introduction• Benefits• Feature Description• Network Requirements• New Parameters• New Counters and Events• Network Impact• SSLM Test Scope• Summary

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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