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UMTS Radio Network KPI
ZTE University
Content
KPI Classification RAN KPI Definition and Measurement KPI Optimization KPI monitor KPI Case study
KPI Overview
NetNumen™M31 (RAN) Mobile Network Element Management System is ZTE Element Management System of operation and management for one or more NEs. (FM, PM, CM)
Performance Monitor (according to the importance and usage):
KPI PI: Performance Indicator SPI: statistical performance indicator: with statistical rule such as
call completion rate>95%. Customized performance index
EMS KPI Monitor Tools: Performance management Fault Management Configuration Management
Coverage Probability
Coverage Class Mobility Class
RNC Soft Handover Success rate Inter-Frequency Hard Handover Success rate Inter-RAT Hard Handover Success rate (CS domain and PS domain) …
QoS Class
RRC Establishment success rate RAB Establishment success rate Radio Access Success Rate Call drop rate Average UL/DL Throughput RTT Ping with 32 Bytes …
Resource Usage Class
Trouble Cell rate Busy Cell rate Sleeping Cell rate …
Capacity Class
CS Capacity PS Capacity Cell UL Load Factor Block Call rate …
RAN KPI Class
RAN KPI Category
Content
KPI Classification RAN KPI Definition and Measurement KPI Optimization KPI monitor KPI Case study
Statistic Period :-
Statistic Area : Clutter-wise
Indoor or Outdoor : BOTH
Measurement Methods : DT or CQT
Index Meaning : The coverage probability reflects the RF coverage strength and RF signal quality.
Statistic Period :-
Statistic Area : Clutter-wise
Indoor or Outdoor : BOTH
Measurement Methods : DT or CQT
Index Meaning : The coverage probability reflects the RF coverage strength and RF signal quality.
Indicator Indicator DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow Indicator Indicator
ExtensionExtension
Coverage Probability
Indicator Indicator ExtensionExtensionSignaling FlowSignaling Flow
Indicator Indicator
DefinitionDefinitionIndicator Indicator DescriptionDescription
Downlink: F=RSCP > R & Ec/Io > S
Uplink: TxPwr < T
Coverage Probability is defined as the percentage of the samples whose F=1 for all the measured samples(Note : Unreasonable samples are not included )
R and S are different for different services
Coverage Probability
Indicator Indicator DescriptionDescription
Indicator Indicator DefinitionDefinition Signaling FlowSignaling Flow Indicator Indicator
ExtensionExtension
Statistic Period :15 Mins, 30 Mins,1 Hour…. 1Day….
Statistic Area : cell-wise
Indoor or Outdoor : BOTH
Measurement Method : calculate based on the OMC Counters’ value
Indicator Meaning : this indicator reflects the accessibility of the Cell
Statistic Period :15 Mins, 30 Mins,1 Hour…. 1Day….
Statistic Area : cell-wise
Indoor or Outdoor : BOTH
Measurement Method : calculate based on the OMC Counters’ value
Indicator Meaning : this indicator reflects the accessibility of the Cell
RRC Establishment Success Rate
Indicator Indicator DescriptionDescription
Indicator Indicator DefinitionDefinition Signaling FlowSignaling Flow Indicator Indicator
ExtensionExtension
RRC Establishment Success Rate
= RRC Connection Setup Complete Times/RRC Connection Request Times×100%
RRC Establishment Success Rate
UE RNC CN
RRC Connection Request
RRC Connection Setup
RRC Connection Complete
DT Message Exchange
Radio Bearer Setup
RAB Assignment Request
Established
Radio Bearer Setup Complete
RAB Assignment Response
RRC Connection Setup Request Times
RRC Connection Setup Complete Times
Indicator Indicator DescriptionDescription
Indicator Indicator DefinitionDefinition Signaling FlowSignaling Flow Indicator Indicator
ExtensionExtension
RRC Establishment Success Rate
Statistic Period : 15 Mins, 30 Mins,1 Hour…. 1 Day….
Statistic Area: RNC & Cell-wise
Indoor or Outdoor: BOTH
Measurement Method: calculate based on the OMC Counters’ value
Indicator Meaning: RAB assignment is the last step of the service connection. If it is successfully assigned, the connection to the User Panel is Successfully Setup
Statistic Period : 15 Mins, 30 Mins,1 Hour…. 1 Day….
Statistic Area: RNC & Cell-wise
Indoor or Outdoor: BOTH
Measurement Method: calculate based on the OMC Counters’ value
Indicator Meaning: RAB assignment is the last step of the service connection. If it is successfully assigned, the connection to the User Panel is Successfully Setup
Indicator Indicator DescriptionDescription
Indicator Indicator DefinitionDefinition Signaling FlowSignaling Flow Indicator Indicator
ExtensionExtension
RAB Establishment Success Rate
RAB Establishment Success rate
=( CS RAB Assignment Success Times +PS RAB Assignment Success Times )
/(CS RAB Assignment Request Times+ PS RAB Assignment Request Times ) ×100%
Indicator Indicator DescriptionDescription
Indicator Indicator DefinitionDefinition Signaling FlowSignaling Flow Indicator Indicator
ExtensionExtension
RAB Establishment Success Rate
UE RNC CN
RRC Connection Request
RRC Connection Setup
RRC Connection Complete
DT Message Exchange
Radio Bearer Setup
RAB Assignment Request
Established
Radio Bearer Setup Complete
RAB Assignment Response
RAB Assignment Request Times
RAB Assignment Success Times
Indicator Indicator DescriptionDescription
Indicator Indicator DefinitionDefinition Signaling FlowSignaling Flow Indicator Indicator
ExtensionExtension
RAB Establishment Success Rate
CS RAB Establishment Success rate PS RAB Establishment Success rate AMR RAB Establishment Success rate CS C 64/64 RAB Establishment Success rate PS I 64/64 RAB Establishment Success rate PS I 64/128 RAB Establishment Success rate PS I 64/384 RAB Establishment Success rate ……
CS RAB Establishment Success rate PS RAB Establishment Success rate AMR RAB Establishment Success rate CS C 64/64 RAB Establishment Success rate PS I 64/64 RAB Establishment Success rate PS I 64/128 RAB Establishment Success rate PS I 64/384 RAB Establishment Success rate ……
Indicator Indicator DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow
Indicator Indicator
ExtensionExtension
RAB Establishment Success Rate
Statistic Period: 15 Mins, 30 Mins, 1 Hour…. 1 Day….
Statistic Area: Cell-wise
Indoor or Outdoor: BOTH
Measurement Method: calculate based on the OMC counters’ value
Indicator Meaning: this indicator reflects the accessibility of the service of the Cell
Statistic Period: 15 Mins, 30 Mins, 1 Hour…. 1 Day….
Statistic Area: Cell-wise
Indoor or Outdoor: BOTH
Measurement Method: calculate based on the OMC counters’ value
Indicator Meaning: this indicator reflects the accessibility of the service of the Cell
Indicator Indicator DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow
Indicator Indicator
ExtensionExtension
Radio Access Success Rate
Call Setup Success Rate
= RRC Establishment Success Rate (Service Related)×RAB Establishment Success rate×100%
Indicator Indicator DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow
Indicator Indicator
ExtensionExtension
Radio Access Success Rate
UE RNC CN
RRC Connection Request
RRC Connection Setup
RRC Connection Complete
DT Message Exchange
Radio Bearer Setup
RAB Assignment Request
Established
Radio Bearer Setup Complete
RAB Assignment Response
RRC Establishment Success Rate
RABEstablishmentSuccess Rate
Indicator Indicator DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow
Indicator Indicator
ExtensionExtension
Radio Access Success Rate
AMR Call Setup Success rate CS C 64/64 Call Setup Success rate PS I 64/64 Call Setup Success rate PS I 64/128 Call Setup Success rate PS I 64/384 Call Setup Success rate PS S 64/64 Call Setup Success rate ……
AMR Call Setup Success rate CS C 64/64 Call Setup Success rate PS I 64/64 Call Setup Success rate PS I 64/128 Call Setup Success rate PS I 64/384 Call Setup Success rate PS S 64/64 Call Setup Success rate ……
Indicator Indicator DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow
Indicator Indicator
ExtensionExtension
Radio Access Success Rate
Statistic Period: 15 Mins, 30 Mins, 1 Hour…. 1Day….
Statistic Area: RNC & Cell-wise Indoor or Outdoor: BOTH
Measurement Method: calculate based on the OMC Counters’ value
Indicator Meaning: this indicator reflects the Retainability of the network, it is one of the most important indicators of the customer’s experience.
Statistic Period: 15 Mins, 30 Mins, 1 Hour…. 1Day….
Statistic Area: RNC & Cell-wise Indoor or Outdoor: BOTH
Measurement Method: calculate based on the OMC Counters’ value
Indicator Meaning: this indicator reflects the Retainability of the network, it is one of the most important indicators of the customer’s experience.
Indicator Indicator DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow
Indicator Indicator
ExtensionExtension
Call Drop Rate
Call Drop Rate
=( RNC Triggered CS RAB Release Number+ RNC Triggered PS RAB Release Number )
/(Total RAB Release number for CS+ Total RAB Release number for PS)
×100%
Indicator Indicator DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow
Indicator Indicator
ExtensionExtension
Call Drop Rate
CN
RABRELEASE REQUEST
RNC
RNC Triggered RAB Release Times
Indicator Indicator DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow
Indicator Indicator
ExtensionExtension
Call Drop Rate
CS Call Drop rate PS Call Drop rate AMR Call Drop rate CS C 64/64 Call Drop rate PS 64/64 Call Drop rate PS 64/128 Call Drop rate PS 64/384 Call Drop rate ……
CS Call Drop rate PS Call Drop rate AMR Call Drop rate CS C 64/64 Call Drop rate PS 64/64 Call Drop rate PS 64/128 Call Drop rate PS 64/384 Call Drop rate ……
Indicator Indicator DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow
Indicator Indicator
ExtensionExtension
Call Drop Rate
Statistic Period: 15 Mins, 30 Mins, 1 Hour…. 1Day
Statistic Area: Cell-wise Indoor or Outdoor: BOTH
Measurement Method: calculate based on the OMC Counters’ value
Indicator Meaning: Rate of blocked calls due to resource shortage.
This index partially reflects the degree of congestion in the cell.
Statistic Period: 15 Mins, 30 Mins, 1 Hour…. 1Day
Statistic Area: Cell-wise Indoor or Outdoor: BOTH
Measurement Method: calculate based on the OMC Counters’ value
Indicator Meaning: Rate of blocked calls due to resource shortage.
This index partially reflects the degree of congestion in the cell.
Indicator Indicator DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow
Indicator Indicator
ExtensionExtension
Call Blocking Rate
Call Blocking Rate
= The number of blocked calls/ The number of call admission requests Times×100%
Indicator Indicator DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow
Indicator Indicator
ExtensionExtension
Call Blocking Rate
Statistic Period: 15 Mins, 30Mins, 1Hour…. 1Day Statistic Area: RNC-wise
Indoor or Outdoor: BOTH
Measurement Method: calculate based on the OMC counters’ value
Indicator Meaning: this indicator reflects the soft handover mobility in the RNC control area.
Statistic Period: 15 Mins, 30Mins, 1Hour…. 1Day Statistic Area: RNC-wise
Indoor or Outdoor: BOTH
Measurement Method: calculate based on the OMC counters’ value
Indicator Meaning: this indicator reflects the soft handover mobility in the RNC control area.
Indicator Indicator DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow
Indicator Indicator
ExtensionExtension
Soft Handover Success Rate
Soft Handover Success Rate
=( Soft Handover Attempted Times- Soft Handover Failure Times )
/Soft Handover Attempted Times×100%
Indicator Indicator DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow
Indicator Indicator
ExtensionExtension
Soft Handover Success Rate
UE UTRAN
ACTIVE SET UPDATE
ACTIVE SET UPDATE COMPLETE
A
B
Success flow
Soft Handover Attempted Times
Soft Handover Failure Times.
Failure Flow UE UTRAN
ACTIVE SET UPDATE
ACTIVE SET UPDATE FAILURE
A
B
Indicator Indicator DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow
Indicator Indicator
ExtensionExtension
Soft Handover Success Rate
Configuration unsupported failure caused handover failure rate Physical channel failure caused handover failure rate Incompatible simultaneous reconfiguration caused handover
failure rate Protocol error caused handover failure rate Cell update occurred caused handover failure rate Invalid configuration caused handover failure rate No reply caused handover failure rate ……
Configuration unsupported failure caused handover failure rate Physical channel failure caused handover failure rate Incompatible simultaneous reconfiguration caused handover
failure rate Protocol error caused handover failure rate Cell update occurred caused handover failure rate Invalid configuration caused handover failure rate No reply caused handover failure rate ……
Indicator Indicator DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow
Indicator Indicator
ExtensionExtension
Soft Handover Success Rate
Statistic Period: 15Mins, 30Mins, 1Hour…. 1Day Statistic Area: cell-wise
Indoor or Outdoor: BOTH
Measurement Method: calculate based on the OMC counters’ value
Indicator Meaning: this indicator reflects the hard handover mobility in the RNC control area.
Statistic Period: 15Mins, 30Mins, 1Hour…. 1Day Statistic Area: cell-wise
Indoor or Outdoor: BOTH
Measurement Method: calculate based on the OMC counters’ value
Indicator Meaning: this indicator reflects the hard handover mobility in the RNC control area.
Indicator Indicator DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow
Indicator Indicator
ExtensionExtension
Inter-Frequency Hard Handover Success Rate
Inter-Frequency Hard Handover Success Rate
=( Inter-Frequency Hard Handover Attempted Times- Inter-Frequency Hard Handover Failure Times )
/ Inter-Frequency Hard Handover Attempted Times ×100%
Inter-Frequency Hard Handover should Include Intra-RNC Hard Handover and Inter-RNC Hard Handover
Indicator Indicator DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow
Indicator Indicator
ExtensionExtension
Inter-Frequency Hard Handover Success Rate
UE SRNC
PHYSICAL CHANNEL RECONFIGURATION
PHYSICAL CHANNEL RECONFIGURATION COMPLETE
UE SRNC
PHYSICAL CHANNEL RECONFIGURATION
PHYSICAL CHANNEL RECONFIGURATION FAILURE
Success Flow
Failure Flow
Inter-frequency hard handover Attempted times
Inter-frequency hard handover failure times
Intra-RNCInter-FrequencyHard HandoverFlow
Indicator Indicator DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow
Indicator Indicator
ExtensionExtension
Inter-Frequency Hard Handover Success Rate
UE Serving RNCDrift RNC MSC/SGSN
Decision to executeHard Handover
RANAP RANAP
RelocationRequired
RANAP RANAPRelocation Request
RANAP RANAPRelocation Request Ack.
RANAP RANAP
RelocationCommand
RANAP RANAPRelocation Detect
RANAP RANAPRelocation Complete
RANAP RANAP
Iu ReleaseCommand
RANAP RANAP
Iu ReleaseComplete
Node BDrift RNS
Node BServing RNS
NBAP NBAPRadio Link Setup
NBAP NBAPRadio Link Setup Response
RRCRRCPhysical Channel Reconfiguration
NBAP NBAPRadio Link Restore Indication
RRCRRCPhysical Channel Reconfiguration Complete
RRCRRCUE Mobility Information
RRCRRCUE Mobility Information CONFIRM
NBAPNBAPRadio Link Deletion Request
NBAPNBAPRadio Link Deletion Response
[A1]
[B1]
[A2]
[B2]
Sent from SRNC
Feedback to DRNC
Inter-RNCInter-FrequencyHard HandoverFlow
Inter-Frequency Hard Handover Success Rate
Configuration unsupported caused intra-NodeB inter-frequency hard handover failure rate
Configuration unsupported caused intra-RNC inter-frequency hard handover failure rate
Configuration unsupported caused inter-RNC inter-frequency hard handover failure rate
Physical channel failure caused intra-NodeB inter-frequency hard handover failure rate
Physical channel failure caused intra-RNC inter-frequency hard handover failure rate
Physical channel failure caused inter-RNC inter-frequency hard handover failure rate
……
Configuration unsupported caused intra-NodeB inter-frequency hard handover failure rate
Configuration unsupported caused intra-RNC inter-frequency hard handover failure rate
Configuration unsupported caused inter-RNC inter-frequency hard handover failure rate
Physical channel failure caused intra-NodeB inter-frequency hard handover failure rate
Physical channel failure caused intra-RNC inter-frequency hard handover failure rate
Physical channel failure caused inter-RNC inter-frequency hard handover failure rate
……
Indicator Indicator DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow
Indicator Indicator
ExtensionExtension
Inter-Frequency Hard Handover Success Rate
Statistic Period: 15Mins, 30Mins, 1Hour…., 1Day Statistic Area: cell-wise or RNC-wise
Indoor or Outdoor: BOTH
Measurement Method : Calculate based on OMC Counters’ value
Indicator Meaning: this indicator reflects the Inter-RAT CS handover mobility, the handover is from UMTS system to GSM system.
Statistic Period: 15Mins, 30Mins, 1Hour…., 1Day Statistic Area: cell-wise or RNC-wise
Indoor or Outdoor: BOTH
Measurement Method : Calculate based on OMC Counters’ value
Indicator Meaning: this indicator reflects the Inter-RAT CS handover mobility, the handover is from UMTS system to GSM system.
Indicator Indicator DescriptionDescription
Indicator Indicator DefinitionDefinition Signaling FlowSignaling Flow Indicator Indicator
ExtensionExtension
Inter-RAT CS Outgoing Handover Success rate ( UMTS->GSM )
CS Inter-RAT Handover Success Rate ( UMTS->GSM )
= 1 - CS Inter-RAT Handover From UTRAN Failure Times/CS Inter-RAT Handover From UTRAN Required Times×100%
Indicator Indicator DescriptionDescription
Indicator Indicator DefinitionDefinition Signaling FlowSignaling Flow Indicator Indicator
ExtensionExtension
Inter-RAT CS Outgoing Handover Success Rate ( UMTS->GSM )
Prepare handover
Handover fromUTRAN command
Prepare handoverresponse
Relocationrequired
Handover complete
Relocationcommand
UE RNC CN 2GMSC
UE UTRAN
HANDOVER FROM UTRAN COMMAND
HANDOVER FROM UTRAN FAILURE
CS Inter-RAT Handover From UTRAN Required Times
CS Inter-RAT Handover From UTRAN Failure Times, if the handover is failed, RNC will receive this message
Success Flow
Failure Flow
Indicator Indicator DescriptionDescription
Indicator Indicator DefinitionDefinition Signaling FlowSignaling Flow Indicator Indicator
ExtensionExtension
Inter-RAT CS Outgoing Handover Success Rate ( UMTS->GSM )
Configuration unsupported caused CS Inter-RAT handover from UTRAN failure rate
Physical channel failure caused CS Inter-RAT handover from UTRAN failure rate
Configuration incomplete caused CS Inter-RAT handover from UTRAN failure rate
Protocol error caused CS Inter-RAT handover from UTRAN failure rate Cell update occurred caused CS Inter-RAT handover from UTRAN failure
rate Invalid configuration caused CS Inter-RAT handover from UTRAN failure
rate No reply caused CS Inter-RAT handover from UTRAN failure rate ……
Configuration unsupported caused CS Inter-RAT handover from UTRAN failure rate
Physical channel failure caused CS Inter-RAT handover from UTRAN failure rate
Configuration incomplete caused CS Inter-RAT handover from UTRAN failure rate
Protocol error caused CS Inter-RAT handover from UTRAN failure rate Cell update occurred caused CS Inter-RAT handover from UTRAN failure
rate Invalid configuration caused CS Inter-RAT handover from UTRAN failure
rate No reply caused CS Inter-RAT handover from UTRAN failure rate ……
Indicator Indicator DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow
Indicator Indicator
ExtensionExtension
Inter-RAT CS Outgoing Handover Success Rate ( UMTS->GSM )
Statistic Period: 15Mins, 30Mins, 1Hour…. 1Day Statistic Area: cell-wise or RNC-wise
Indoor or Outdoor: BOTH
Measurement Method: calculate based on the OMC counters’ value
Indicator Meaning: this indicator reflects the Inter-RAT handover mobility, the handover is from UMTS system to GPRS system.
Statistic Period: 15Mins, 30Mins, 1Hour…. 1Day Statistic Area: cell-wise or RNC-wise
Indoor or Outdoor: BOTH
Measurement Method: calculate based on the OMC counters’ value
Indicator Meaning: this indicator reflects the Inter-RAT handover mobility, the handover is from UMTS system to GPRS system.
Indicator Indicator DescriptionDescription
Indicator Indicator DefinitionDefinition Signaling FlowSignaling Flow Indicator Indicator
ExtensionExtension
Inter-RAT PS Outgoing Handover Success Rate ( UMTS->GPRS )
PS Inter-RAT Handover Success Rate ( UMTS->GPRS )
= 1 - PS Inter-RAT Handover From UTRAN Failure Times/PS Inter-RAT Handover From UTRAN Required Times×100%
Indicator Indicator DescriptionDescription
Indicator Indicator DefinitionDefinition Signaling FlowSignaling Flow Indicator Indicator
ExtensionExtension
Inter-RAT PS Outgoing Handover Success Rate ( UMTS->GPRS )
UE NODEB RNC 3G SGSN
Cell change order from UTRAN Iu Release Command
RL Del Resp
RL Del Req
Iu Release Complete
UE UTRAN
CELL CHANGE ORDER FROM UTRAN
CELL CHANGE ORDER FROM UTRAN FAILURE
Success Flow
Failure Flow
PS Inter-RAT handover from UTRAN required Times
PS Inter-RAT handover from UTRAN failure times. If the RNC received this message, or response message of Iu Release Command is not received by RNC, it means the PS handover from UTRAN is failed.
Indicator Indicator DescriptionDescription
Indicator Indicator DefinitionDefinition Signaling FlowSignaling Flow Indicator Indicator
ExtensionExtension
Inter-RAT PS Outgoing Handover Success Rate ( UMTS->GPRS )
configuration unsupported caused PS Inter-RAT handover from UTRAN failure rate
physical channel failure caused PS Inter-RAT handover from UTRAN failure rate
configuration incomplete caused PS Inter-RAT handover from UTRAN failure rate
protocol error caused PS Inter-RAT handover from UTRAN failure rate cell update occurred caused PS Inter-RAT handover from UTRAN
failure rate invalid configuration caused PS Inter-RAT handover from UTRAN
failure rate No reply caused PS Inter-RAT handover from UTRAN failure rate ……
configuration unsupported caused PS Inter-RAT handover from UTRAN failure rate
physical channel failure caused PS Inter-RAT handover from UTRAN failure rate
configuration incomplete caused PS Inter-RAT handover from UTRAN failure rate
protocol error caused PS Inter-RAT handover from UTRAN failure rate cell update occurred caused PS Inter-RAT handover from UTRAN
failure rate invalid configuration caused PS Inter-RAT handover from UTRAN
failure rate No reply caused PS Inter-RAT handover from UTRAN failure rate ……
Indicator Indicator DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow
Indicator Indicator
ExtensionExtension
Inter-RAT outgoing PS Handover Success Rate ( UMTS->GPRS )
Statistic Period: 15Mins, 30Mins, 1Hour…., 1Day Statistic Area: cell-wise or RNC-wise
Indoor or Outdoor: BOTH
Measurement Method : Calculate based on OMC Counters’ value
Indicator Meaning: this indicator reflects the Inter-RAT handover mobility, the handover is from GRRS system to UMTS system.
Statistic Period: 15Mins, 30Mins, 1Hour…., 1Day Statistic Area: cell-wise or RNC-wise
Indoor or Outdoor: BOTH
Measurement Method : Calculate based on OMC Counters’ value
Indicator Meaning: this indicator reflects the Inter-RAT handover mobility, the handover is from GRRS system to UMTS system.
Indicator Indicator DescriptionDescription
Indicator Indicator DefinitionDefinition Signaling FlowSignaling Flow Indicator Indicator
ExtensionExtension
Inter-RAT Incoming PS Handover Success Rate ( GPRS->UMTS )
Indicator Indicator DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow Indicator Indicator
ExtensionExtension
PS Inter-RAT Handover to UTRAN Success rate ( GPRS->UMTS )
= PS Inter-RAT Handover to UTRAN Success Times/PS Inter-RAT Handover to UTRAN Attempted Times×100%
Inter-RAT Incoming PS Handover Success Rate ( GPRS->UMTS )
UE Serving RNC
1. UE initiated signaling connection establishment
CN
2. Direct Transfer
3. Radio Access Bearer Establishment
The flow of PS Inter-RAT handover to UTRAN is similar to the PS setup flow on the UTRAN Side
RNC received message RRC Connection Request ( from UE, the cause is Inter-RAT cell reselection ) can be used for calculating the PS Inter-RAT handover to UTRAN required times ; RNC received message RRC Connection Complete (From UE) can be used for calculating the PS Inter-RAT handover to UTRAN success times
Indicator Indicator DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow Indicator Indicator
ExtensionExtension
Inter-RAT Incoming PS Handover Success Rate (GPRS->UMTS )
Statistic Period: -
Statistic Area: -
Indoor or Outdoor: BOTH
Measurement Method : DT&CQT
Indicator Meaning: this indicator reflects the integrity of CS 12.2K service. It is one of the most important indicators of the customer’s experience.
Statistic Period: -
Statistic Area: -
Indoor or Outdoor: BOTH
Measurement Method : DT&CQT
Indicator Meaning: this indicator reflects the integrity of CS 12.2K service. It is one of the most important indicators of the customer’s experience.
IndicatorIndicator
DescriptionDescription
IndicatorIndicator
DefinitionDefinitionSignaling FlowSignaling Flow
IndicatorIndicator
ExtensionExtension
CS12.2K Service Access Time
CS12.2K Service Access Time
= Average 【 T ( CC Alert)- T ( RRC Connection Request )】
IndicatorIndicator
DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow
IndicatorIndicator
ExtensionExtension
CS12.2K Service Access Time
UEUE RNSRNS CNCN Incoming CNIncoming CN
ISUP IAM
RRC DT(Call Proceeding)
RRC DT(CM Service Request)
CN Signaling Connection Process
Authority and Safe Mode Process
RRC DT(Setup)
RAB Assignment Process
ISUP ACMRRC DT (Alert) ISUP ANM RRC DT(Connect)
RRC DT(Connect ACK)
Service data ( talking… )
CN Bear Setup ProcessT ( CC Alert )
RRC Connection Request
RRC Connection Setup
RRC Connection Setup Complete
T ( RRC Connection Request )
IndicatorIndicator
DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow
IndicatorIndicator
ExtensionExtension
CS12.2K Service Access Time
Statistic Period: -
Statistic Area: -
Indoor or Outdoor: BOTH
Measurement Method : DT&CQT
Indicator Meaning: this indicator reflects the integrity of CS 64K service. It is one of the most important indicators of the customer’s experience.
Statistic Period: -
Statistic Area: -
Indoor or Outdoor: BOTH
Measurement Method : DT&CQT
Indicator Meaning: this indicator reflects the integrity of CS 64K service. It is one of the most important indicators of the customer’s experience.
IndicatorIndicator
DescriptionDescription
IndicatorIndicator
DefinitionDefinitionSignaling FlowSignaling Flow
IndicatorIndicator
ExtensionExtension
CS64K Service Access Time
CS64K Service Access Time
= Average 【 T ( RRC Request)- T ( CM Service Request )】
IndicatorIndicator
DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow
IndicatorIndicator
ExtensionExtension
CS64K Service Access Time
ISUP IAM
UEUE RNSRNS CNCN Incoming CNIncoming CN
RRC DT (Call Proceeding)
RRC DT(CM Service Request)
CN Signaling Connection Process
Authority and Safe Mode Process
RRC DT (Setup)
RAB Assignment Process
ISUP ACMRRC DT (Alert) ISUP ANM RRC DT (Connect)
RRC DT (Connect ACK)
Service data ( talking… )
CN bear setup processT ( CC Alert )
RRC Connection Request
RRC Connection Setup
RRC Connection Setup Complete
T ( RRC Connection Request )
IndicatorIndicator
DescriptionDescription
IndicatorIndicator
DefinitionDefinitionSignaling FlowSignaling Flow
IndicatorIndicator
ExtensionExtension
CS64K Service Access Time
Statistic Period: -
Statistic Area: -
Indoor or Outdoor: BOTH
Measurement Method : DT&CQT
Indicator Meaning: this indicator reflects the integrity of PS service. It is one of the most important indicators of the customer’s experience.
Statistic Period: -
Statistic Area: -
Indoor or Outdoor: BOTH
Measurement Method : DT&CQT
Indicator Meaning: this indicator reflects the integrity of PS service. It is one of the most important indicators of the customer’s experience.
IndicatorIndicator
DescriptionDescription
IndicatorIndicator
DefinitionDefinitionSignaling FlowSignaling Flow
IndicatorIndicator
ExtensionExtension
PS Service Access Time
PS Service Access Time
= Average 【 T ( Active PDP Context Accept)- T ( Activate PDP Context Request )】
IndicatorIndicator
DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow
IndicatorIndicator
ExtensionExtension
PS Service Access Time
ISUP IAM
UEUE RNSRNS CNCN Incoming CNIncoming CN
RRC DT (Active PDP Context Accept )
RRC DT(CM Service Request)
CN Signaling Connection Process
Authority and Safe Mode Process
RRC DT (Activate PDP Context Request )
RAB Assignment Process
ISUP ACMRRC DT (Alert) ISUP ANM RRC DT (Connect)
RRC DT (Connect ACK)
Service data ( talking… )
CN bear setup process
Activate PDP Context Request
RRC Connection Request
RRC Connection Setup
RRC Connection Setup Complete
IndicatorIndicator
DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow
IndicatorIndicator
ExtensionExtension
PS Service Access Time
Active PDP Context Accept
Statistic Period: 15Mins, 30Mins, 1Hour…., 1Day Statistic Area: cell-wise
Indoor or Outdoor: BOTH
Measurement Method : Calculate based on OMC Counters’ value
Indicator Meaning: this indicator reflects the traffic Erlang of the CS conversation service
Statistic Period: 15Mins, 30Mins, 1Hour…., 1Day Statistic Area: cell-wise
Indoor or Outdoor: BOTH
Measurement Method : Calculate based on OMC Counters’ value
Indicator Meaning: this indicator reflects the traffic Erlang of the CS conversation service
IndicatorIndicator
DescriptionDescription
IndicatorIndicator
DefinitionDefinitionSignaling FlowSignaling Flow
Indicator Indicator
ExtensionExtension
CS Service Traffic Erlang
CS Call Duration
=∑【 Time ( Radio Link Setup Response )- Time ( Radio Link Deletion Response )】
CS Service Traffic ERL = Total CS Call Duration of a Certain Period/3600
IndicatorIndicator
DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow
IndicatorIndicator
ExtensionExtension
CS Service Traffic Erlang
CS AMR Voice Service Traffic Erlang
CS Video Phone Service Traffic Erlang
CS AMR Voice Service Traffic Erlang
CS Video Phone Service Traffic Erlang
IndicatorIndicator
DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow
Indicator Indicator
ExtensionExtension
CS Service Traffic Erlang
Statistic Period: 15Mins, 30Mins, 1Hour…., 1Day Statistic Area: cell-wise
Indoor or Outdoor: BOTH
Measurement Method : Calculate based on OMC Counters’ value
Indicator Meaning: this indicator reflects the total throughput of PS service
Statistic Period: 15Mins, 30Mins, 1Hour…., 1Day Statistic Area: cell-wise
Indoor or Outdoor: BOTH
Measurement Method : Calculate based on OMC Counters’ value
Indicator Meaning: this indicator reflects the total throughput of PS service
IndicatorIndicator
DescriptionDescription
IndicatorIndicator
DefinitionDefinitionSignaling FlowSignaling Flow
Indicator Indicator
ExtensionExtension
PS Service Throughput
UL PS Service Throughput = RNC Received Total RLC PDU BytesDL PS Service Throughput = RNC Sent Total RLC PDU Bytes
( Including user data , RLC head data , retransfer data , signaling data , Unit : Kbytes)
IndicatorIndicator
DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow
IndicatorIndicator
ExtensionExtension
PS Service Throughput
PS I 64/64 UL Throughput PS I 64/64 UL Throughput PS B 64/64 UL Throughput PS B 64/64 UL Throughput PS S 64/64 UL Throughput PS S 64/64 UL Throughput ……
PS I 64/64 UL Throughput PS I 64/64 UL Throughput PS B 64/64 UL Throughput PS B 64/64 UL Throughput PS S 64/64 UL Throughput PS S 64/64 UL Throughput ……
IndicatorIndicator
DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow
IndicatorIndicator
ExtensionExtension
PS Service Throughput
Statistic Period: 15Mins, 30Mins, 1Hour…., 1Day
Statistic Area: cell-wise
Indoor or Outdoor: BOTH
Measurement Method: Calculate based on Measurement Report value
Indicator Meaning: this indicator reflects the cell average UL load factor in a defined period, it is calculated based on the RTWP value on a certain frequency.
Statistic Period: 15Mins, 30Mins, 1Hour…., 1Day
Statistic Area: cell-wise
Indoor or Outdoor: BOTH
Measurement Method: Calculate based on Measurement Report value
Indicator Meaning: this indicator reflects the cell average UL load factor in a defined period, it is calculated based on the RTWP value on a certain frequency.
IndicatorIndicator
DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow
IndicatorIndicator
ExtensionExtension
UL Interference Load Factor
UL Interference Load Factor
=( UL RTWP measurement value - N0 )/UL RTWP measurement value×100%
IndicatorIndicator
DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow
IndicatorIndicator
ExtensionExtension
UL Interference Load Factor
Statistic Period: 15Mins, 30Mins, 1Hour…., 1Day Statistic Area: cell-wise
Indoor or Outdoor: BOTH
Measurement Method: Calculate based on Measurement Report value
Indicator Meaning: this indicator reflects the cell average DL load degree in a defined period, it is calculated based on the base station Tx power.
Statistic Period: 15Mins, 30Mins, 1Hour…., 1Day Statistic Area: cell-wise
Indoor or Outdoor: BOTH
Measurement Method: Calculate based on Measurement Report value
Indicator Meaning: this indicator reflects the cell average DL load degree in a defined period, it is calculated based on the base station Tx power.
IndicatorIndicator
DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow
IndicatorIndicator
ExtensionExtension
DL Power Load Factor
DL Power Load Factor
= DL Average Transmitting Carrier Power/Configured DL Maximal Transmitting Carrier Power×100%
IndicatorIndicator
DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow
IndicatorIndicator
ExtensionExtension
DL Power Load Factor
Statistic Period: 15Mins, 30Mins, 1Hour…., 1Day Statistic Area: RNC-wise
Indoor or Outdoor: BOTH
Measurement Method : Calculate based on OMC Counters’ value
Indicator Meaning: this indicator reflects the rate of dead cells to total cells, it is an assistant to analyze the QoS of whole network.
Statistic Period: 15Mins, 30Mins, 1Hour…., 1Day Statistic Area: RNC-wise
Indoor or Outdoor: BOTH
Measurement Method : Calculate based on OMC Counters’ value
Indicator Meaning: this indicator reflects the rate of dead cells to total cells, it is an assistant to analyze the QoS of whole network.
IndicatorIndicator
DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow
IndicatorIndicator
ExtensionExtension
Trouble Cell Rate
Trouble Cell Rate
= Trouble Cell Number/ Active Cell Number×100%
Trouble Cell is the cell whose call drop rate >a % or Radio Access Success rate <b%
IndicatorIndicator
DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow
IndicatorIndicator
ExtensionExtension
Trouble Cell Rate
Statistic Period: 15Mins, 30Mins, 1Hour…., 1Day Statistic Area: RNC-wise
Indoor or Outdoor: BOTH
Measurement Method : Calculate based on OMC Counters’ value
Indicator Meaning: this indicator reflects the rate of busy cells to total cells, it is an assistant to analyze the QoS of whole network.
Statistic Period: 15Mins, 30Mins, 1Hour…., 1Day Statistic Area: RNC-wise
Indoor or Outdoor: BOTH
Measurement Method : Calculate based on OMC Counters’ value
Indicator Meaning: this indicator reflects the rate of busy cells to total cells, it is an assistant to analyze the QoS of whole network.
IndicatorIndicator
DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow
IndicatorIndicator
ExtensionExtension
Busy Cell Rate
Busy Cell rate
= Busy Cell Number/Active Cell Number×100 %
Busy cell is the cell whose DL Power Load factor >c %or Code Resource Occupation Factor >d %
IndicatorIndicator
DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow
IndicatorIndicator
ExtensionExtension
Busy Cell Rate
Statistic Period: 15Mins, 30Mins, 1Hour…., 1Day Statistic Area: RNC-wise
Indoor or Outdoor: BOTH
Measurement Method : Calculate based on OMC Counters’ value
Indicator Meaning: this indicator reflects the rate of idle cells to total cells, it is an assistant to analyze the QoS of whole network.
Statistic Period: 15Mins, 30Mins, 1Hour…., 1Day Statistic Area: RNC-wise
Indoor or Outdoor: BOTH
Measurement Method : Calculate based on OMC Counters’ value
Indicator Meaning: this indicator reflects the rate of idle cells to total cells, it is an assistant to analyze the QoS of whole network.
IndicatorIndicator
DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow
IndicatorIndicator
ExtensionExtension
Sleeping Cell Rate
Sleeping Cell rate
= Sleeping Cell Number/Active Cell Mumber×100%
Sleeping Cell is the cell whose DL power load factor <e %
IndicatorIndicator
DescriptionDescription
Indicator Indicator
DefinitionDefinitionSignaling FlowSignaling Flow
IndicatorIndicator
ExtensionExtension
Sleeping Cell Rate
Content
KPI Classification RAN KPI Definition and Measurement KPI Optimization KPI monitor KPI Case study
EMS KPI Optimization Process
EMS KPI Optimization Process
Key KPIs Worth Your Attention
RRC Establishment Success Rate
Cell RAB Establishment Success Rate, CS domain
Cell RAB Establishment Success Rate, PS domain
Cell RAB Establishment Success Rate
Radio Access Success Rate
Call Drop Rate - Voice
Cell PS Call Drop Rate
Cell Success Rate of SHO
Cell Inter-RAT CS Outgoing Handover Success Rate(UMTS->GSM)
Radio Access Success Rate
Radio access success rate = RRC establishment success rate × RAB establishment success rate
This formula indicates that RRC establishment rate and RAB establishment rate need to be considered in the background statistics.
RRC establishment success rate = Number of successful RRC connection setup times of each cell / Number of RRC connection request times of each cell × 100 %
Note: related with services (RRC connection) RAB establishment success rate = Number of successful
RAB establishment times / Number of RAB establishment attempts × 100%
RAB establishment success rate is categorized by service.
Access Success Rate Analysis Process
Access Failure Caused by RAB Establishment Failure There are two restraints in RAB establishment process.
One is RB establishment which is the UE configuration process (usually no problems occur in this process); and the other is radio link re-configuration process in which NodeB links are configured. Failures often occur in the latter process. The usual causes for these failures include radio link re-configuration preparation failure (it occurs when problems occur in NodeB resources.), and radio link re-configuration cancellation (it occurs when problems occur in RNC internal resources or process). Another factor may also cause RAB failures, that is, when the load of a cell is relatively heavy, RNC sends out a reject command via admission control.
Call Drop Optimization
Handover Success Rate Optimization
Factors affecting handover success rate Handover area is too small, so that UEs have not enough time to
complete handover. Handover parameters are wrongly set, so that neighbor cells
cannot be added or deleted timely, or causing ping-pong handover. Neighbor cells are not configured. This may cause damage to the
network, not only directly causing call drop, but also brings extra interference towards the network.
Content
KPI Classification RAN KPI Definition and Measurement KPI Optimization KPI monitor KPI Case study
Resource KPI monitor One reason for resource limitation is number of 3G user increase, and operator
changing fee decrease also lead to the increase of average erlang. The other reason is the strategy for design is focus on user feeling and KPI but not system capacity. For example HK user average Erl could be up to 0.5E.
Resource KPI monitor Single user erlang could be 0.45erl on BH :
Resource KPI monitor
Resource KPI and threshold. Resource KPI mainly include DL power, UL capacity, code resource and
CE resource.
Resource Type KPI id and name threshold
TCP
C301320150 Number of rejected services,DCH downlink TCP limit 50
PI30167 Average non-HSDPA TCP 40%
PI30092 Maximum Cell TCP (%) 100%
PI30093 Average Cell TCP 70%
UL TrafficPI30029 Handover Blocking Rate 0.5%
KPI RTWP ( in busy hour ) -98dBm
Code
C301320153 Number of rejected services, DCH no code 50
PI30205 Average Cell HSUPA Users 12
PI30172 Cell Average HSDPA Users 16
CEPI301830006 Maximum use Ratio of Uplink NodeB CE 60%
PI301830010 Maximum use Ratio of Downlink NodeB CE 60%
Resource KPI monitor
Related KPI
DL power monitor
RNC TCP limitation with CS call drop 2009-06-09 RNC Call Drop Rate,CS Traffic Volume, CS AMR(Erl) Number of rejected services,DCH downlink TCP limit
00:00:00 01:00:00 1.24% 851.54 5601:00:00 02:00:00 1.07% 481.2097 22 02:00:00 03:00:00 1.09% 253.1742 12 03:00:00 04:00:00 0.70% 134.0175 5 04:00:00 05:00:00 0.61% 84.9817 11 05:00:00 06:00:00 0.54% 66.0458 11 06:00:00 07:00:00 0.64% 102.6633 31 07:00:00 08:00:00 1.06% 259.94 235 08:00:00 09:00:00 1.31% 658.3644 2262 09:00:00 10:00:00 1.11% 1242.4528 1875 10:00:00 11:00:00 0.91% 1798.6944 3261 11:00:00 12:00:00 1.04% 2266.3008 7064 12:00:00 13:00:00 1.09% 2629.905 8398 13:00:00 14:00:00 0.99% 2488.7411 3719 14:00:00 15:00:00 1.05% 2494.8219 7936 15:00:00 16:00:00 1.05% 2598.1903 10515 16:00:00 17:00:00 1.16% 2762.4531 11489 17:00:00 18:00:00 1.20% 2930.3844 9926 18:00:00 19:00:00 1.45% 3336.4133 22875 19:00:00 20:00:00 1.29% 2674.1925 5196 20:00:00 21:00:00 1.04% 1946.7989 1288 21:00:00 22:00:00 1.13% 1858.4106 616 22:00:00 23:00:00 1.32% 1818.2567 575 23:00:00 00:00:00 1.35% 1445.835 216
DL power monitor Modify reserve HSDPA power according to system algorithm. MinHsdpaPower ( MinHspaPwrRto ) +NoHsPower >Node B
admission threshold ( MinHsdpaPower stands for HSDPA reserved power ), DL congestion control will start (downgrade DL DCH rate)。 MinHspaPwrRto default value is 20%.
Number of rejected services,Handover
-500
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2009-6-12 6 1 1 0 0 0 0 2 22 99 556649108471821954108121201760 66 9 19 13
2009-6-17 0 2 0 0 0 0 2 0 6 28 113187252 95 214261285367643 86 10 11 4 3
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DL power monitor
Because high load cell often be with high admission failure, normally we should fast downgrade to release radio resource ASAP. Avoid handover user could not handover in the cell then call dropped.(this action is only take effect in cell with much more PS users, if all users in the cell is in CS service. It will not take effect).
Abbreviated Name
Parameter nameRange
and StepCurrent Value
Update value
remark
UlDnMaxStgMaximum Number of Degraded Uplink Load Steps Every Time
[1, 8] 1 2Downgrade from
384kbps to 16kbps
DlDnMaxStgMaximum Number of Degraded
Downlink Load Steps Every Time[1, 8] 1 3
Downgrade from 384kbps to 8kbps
DL power monitor
Through decrease DL Eb/No could lead to reduced congestion. While we need detailed evaluation to avoid some other bad effect. Table showed record for the modification, and can be consider as the reference. ZTE engineering experience showed downgrade Eb/No for 13.6K signaling channel could reduce TCP limitation effectively, while the performance of access will not be affect so much.
Abbreviated Name
Parameter name
Current Value
Update value
remarkModify purpose
DlEbNoDownlink
Traffic Eb/No7.5 5.1
B class parameter , service related parameter, modify 13.6K signaling only
(service class 5)
Reduce TCP Limit
UL capacity monitor
Call drop rate increasing not means UL capacity limitation, but call drop increasing is the most common scene for limitation. Because call drop rate is most cared KPI, and be observed every day.
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Cel l Cal l Drop Rate, CS1 Cel l Cal l Drop Rate, CS2
UL capacity monitor
RTWP increasing is the most directly representation for UL limitation, while sometimes reason for RTWP increasing could be external interference. And it’s hard to eliminate this reason.
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Maxi mum RTWP(dBm)1 Maxi mum RTWP(dBm)2
UL capacity monitor
Erlang is determining factor for UL limitation either. There are many factors related to the erlang of a cell. Normally we should care for cell capacity, if erlang in a cell exceed 20 erlang in BH.
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Cel l Traffi c Vol ume, CS(Er l )1 Cel l Traffi c Vol ume, CS(Er l )2
UL capacity monitor
UL Power control parameter modification. The quality of users will be down as a consequent of capacity increasing. Optimization will do trade-off between capacity and quality.
Abbreviated Name
Parameter meaning Modification objectCurrent Value
new value
effect
ULINITSIRUplink Initial SIR target (dB)
Uplink 3.4k/13.6k Signaling , Uplink 12.2k AMR
4-5 3.5 Obviously
ULMAXSIRMaximum Uplink SIR target (dB)
Uplink 3.4k/13.6k Signaling , Uplink 12.2k AMR
15 10 Obviously
B class parameter
BLER Period Factor / Tolerance BLER Period
Uplink 3.4k/13.6k Signaling , Uplink 12.2k AMR
2/250 1/70 Obviously
UlSirTargDnStep
Uplink SIR Target Down Step Size (dB)
Uplink 3.4k/13.6k Signaling , Uplink 12.2k AMR
0.1 0.2A few improvement
UL capacity monitor
Through UL power control parameter optimization we can improve RTWP increasing, but some cells will be in trouble for user increasing. And further modification to SIRtarget will affect subscriber feeling. For this case ZTE suggest to define another set of power control parameter which is special for these high load cells. The following table is comparison of parameters for special site and parameters for normal site.
SRVTYPE ULINITSIR ULMAXSIR ULMINSIR
0 3.5->1.5 10.0->3.5 2.0->1.0
104 4.0->2.0 15.0->5.0 0.5->0
28 3.5->1.5 10.0->3.5 0.5->0
50 6.0->2.0 15.0->5.0 2.0->0
54 6.0->2.0 15.0->5.0 2.0->0
Code resource monitor
Through observing "Number of rejected services, DCH no code” we could know cell is in code limitation. Also “average code resource usage” and “HSDPA user number” could be factor for determination and optimization. We could modify the code allocation to reduce code limitation.
OcuRateNoHspdsch+OcuRateHspdsch+DpchCodeHy+32<=512 formula 1
OcuRateNoHspdsch+OcuRateHspdsch+CodeUptHyA>512 formula 2
“OcuRateHspdsch” is the number of code (SF=512) which is blocked by the code occupied by HS-PDSCH channel.
“OcuRateNoHspdsch” is the number of code (SF=512) which is blocked by the code occupied by not HS-PDSCH channel.
“DpchCodeHy” is the number of code (SF=512) reserved for DPCH channel. “CodeUptHyA” is the threshold to determine if we need decrease HS-PDSCH
channel number. When formula1 is fulfilled NO. of HS-PDSCH +1. When formula 2 is fulfilled NO. of HS-PDSCH -1.
Code resource monitor
To assure R99 user accessibility, the modification is apply.
Abbreviated Name
Parameter name
Range and Step
Current Value
Update value
remark
DpchCodeHy DPCH Code Hysteresis
0..512 16 28To decrease the number of rejected services for DCH no code
CodeUptHyACode Update Hysteresis A
0..512 16 28To decrease the number of rejected services for DCH no code
Content
KPI Classification RAN KPI Definition and Measurement KPI Optimization KPI monitor KPI Case study
Case 1: TCP Congestion at Victory Park
Background Victory Park more than
100,000 People Gathering Time is 20:00 June 4th
KPI Indication Performance deteriorate for
site VPK at Victory Park Call Drop Rate Increase Site VPK Transmission
Code Power Congestion
Case 1:Call Drop Rate & Number is high in VPK
Case 1:VPK Radio Access Rate and Rejected Services by TCP limit
Case 2: Wrong LAC Configuration
After the configuration data check, we found that there are several cells with a wrong LAC configuration.
We need KPI monitor tools to give us an evidence. Use SAY Site as an example:
Number of attempted RRC Establishment is more than 100,000 times while only around 6,000 times for services.
Case 3 : High Call Drop Rate Due To The NSN Sites Interference Background
After the KPI monitoring, we found the drop rate around Convention and Exhibition Center is quite high.
After the drive test and KPI analysis, we found the reason is that the NSN LUR site F1 is still open.
After the site is turned off on 12th May the call drop rate decreased.
Case 3 : High Call Drop Rate Due To The NSN Sites Interference
Site CTW has very high call drop rate. After checking the Fault management Alarm, there are a
lot of “board reboots alarm”. After checking the NodeB, the reason for this alarm is non-
sufficient power supply due to GSM, UMTS and NSN BTS in very narrow space with a temporary power solution.
Three times “Node B is out of service(198083023)” during 15:00 to 16:00 on June 11th.
Case 4: High Call Drop Rate due to Power Alarm
Case 4: High Call Drop Rate due to Power Alarm
Case 4: High Call Drop Rate due to Power Alarm
Case 5: Iub E1/T1 Bandwidth Limitation
Background: After 80% NSN UMTS users are cut into the network on may 11th,
subscriber number increased a lot
KPI Indication: “Cell RAB establishment success rate” decreased a lot.
Analysis Capacity related. After checking the related configuration, Iub interface E1/T1
bandwidth limitation is a key reason for the problem.
Solution: Decrease some of the cells Pilot Channel Power Increase Iub interface bandwidth
Case 5: Iub E1/T1 Bandwidth Limitation
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