RRC Success Rate and RRC Drop Analysis

Cluster Zakynthos(Zante)

Wind CSFB and Data Statistics showing poor RRC Setup Success and RRC Drop Rate

Class Key Performance Indicator Service Criteria Preswap Afterswap CommentsTotal Number of Calls(DT-FTP DL) n/a 272

Throughput FTP Peak Application Throughput (DL) _DT

FTP Peak Application Throughput (DL) _DT>=Current NW value(kbps)

n/a 80246.13281

Throughput FTP Mean Application Throughput (DL)_DT

FTP Mean Application Throughput (DL)_DT>=Current NW value

n/a 13967.04909

4G Retainability Session Failure Ratio_DT Session Failure Ratio_DT<=Current NW value n/a 4.41%4G Accessibility RRC Setup Success Rate n/a 37.10%4G Accessibility RRC Connection Setup Time (ms) n/a 864G Retainability RRC Drop Rate n/a 55.26%

4G Mobility LTE Intrarfreq HO Success Rate n/a 88.32%4G Mobility LTE Interrfreq HO Success Rate n/a 94.23%

4G Accessibility CSFB Setup Success Rate Towards 3G n/a 98.49%4G Accessibility CSFB Setup Success Rate Towards 2G n/a 98.33%4G Accessibility CSFB Redirection Time Towards 3G n/a 848.33391614G Accessibility CSFB Setup Time Towards 3G n/a 6574.4248254G Accessibility CSFB Redirection Time Towards 2G n/a 1825.4022564G Accessibility CSFB Setup Time Towards 2G n/a 10542.69737

4G Accessibility LTE Reselect Time after CSFB n/a 171524.0294 few CSFB Calls with reselection back to LTE > 500s(~30s with these calls excluded)

Wind LTE DATA - Time Binning (1000 ms)

CSFB Analysis

Data Call Statistics Analysis (DT)

Range LTE_Uu_RRC_RRCConnectionReestablishmentRequest_reestablishmentCause handoverFailure 172 otherFailure 98

Vodafone CSFB and Data Statistics showing poor RRC Setup Success and RRC Drop Rate

Class Key Performance Indicator Service Criteria Preswap Afterswap CommentsTotal Number of Calls(DT-FTP DL) n/a 114

Throughput FTP Peak Application Throughput (DL) _DT

FTP Peak Application Throughput (DL) _DT>=Current NW value(kbps)

n/a 54285.05469

Throughput FTP Mean Application Throughput (DL)_DT

FTP Mean Application Throughput (DL)_DT>=Current NW value

n/a 9374.640653

4G Retainability Session Failure Ratio_DT Session Failure Ratio_DT<=Current NW value n/a 11.40%4G Accessibility RRC Setup Success Rate n/a 17.82%4G Accessibility RRC Connection Setup Time (ms) n/a 854G Retainability RRC Drop Rate n/a 23.57%

4G Mobility LTE Intrarfreq HO Success Rate n/a 93.57%4G Mobility LTE Interrfreq HO Success Rate n/a n/a

4G Accessibility CSFB Setup Success Rate Towards 3G n/a 99.49%4G Accessibility CSFB Setup Success Rate Towards 2G n/a 100.00%4G Accessibility CSFB Redirection Time Towards 3G n/a 207.4691634G Accessibility CSFB Setup Time Towards 3G n/a 5191.2599124G Accessibility CSFB Redirection Time Towards 2G n/a 187.88888894G Accessibility CSFB Setup Time Towards 2G n/a 9951.5

4G Accessibility LTE Reselect Time after CSFB n/a 56097.7891 few CSFB Calls with reselection back to LTE > 70s, Average~ 30s with abnormal values excluded

Vodafone LTE DATA - Time Binning (1000 ms)

CSFB Analysis

Data Call Statistics Analysis (DT)

Range LTE_RRCConnectionAttempt Range LTE_RRCConnectionSetupFail1 1111 1 911

For both Wind and Vodafone Cell Radius is up to 15km which is normal value for LTE1800.

Wind RRC Setup Failures and RRC Drops map – big number of failures, randomly spread.

Vodafone RRC Setup Failures and RRC Drops map – big number of failures, randomly spread.

Wind – Distance measured >15km in more than 60% of the route driven.LTE_UE_Data_Wind-Distance (metres) >= 0.000000 to < 100.000000 (800) 1.3% >= 100.000000 to < 500.000000 (931) 1.5% >= 500.000000 to < 1000.000000 (944) 1.5% >= 1000.000000 to < 5000.000000 (7097) 11.4% >= 5000.000000 to < 10000.000000 (7942) 12.8% >= 10000.000000 to < 15000.000000 (7096) 11.4% >= 15000.000000 to < 20000.000000 (5744) 9.2% Above 20000.000000 (31569) 50.8%

LTE_UE_Data_VDF-Distance (metres) >= 0.000000 to < 100.000000 (801) 1.3% >= 100.000000 to < 500.000000 (931) 1.5% >= 500.000000 to < 1000.000000 (944) 1.5% >= 1000.000000 to < 5000.000000 (7092) 11.5% >= 5000.000000 to < 10000.000000 (7931) 12.8% >= 10000.000000 to < 15000.000000 (7072) 11.4% >= 15000.000000 to < 20000.000000 (5728) 9.3% Above 20000.000000 (31425) 50.7%

Vodafone – Distance measured >15km in 60% of the route driven.

Conclusion• RF Optimization is required for consistent cell coverage and

overshooting control• Parameter adjustment is required e.g. cell radius in order some

distant servers with good coverage to provide coverage required.• HO Parameters e.g. HO forbidden should be set on Cell to NB relation

in order distant servers not to be used and hence drops will be avoided.

• Due to specific area – water and islands optimization of azimuths, tilts, parameters and Network strategy should be adjusted in order to improve Network performance.