1. Project CA project T00087 oss KPI justification - Appendix CA Project
Project CA project
T00087 oss KPI justification - Appendix
© Ericsson AB 2016

2. CA Project
3G OSS Justification
© Ericsson AB 2016

3. 3G oss kpi justification
CA Project
3G oss kpi justification #
Description
Target Value
Technology
Baseline KPI (02/01/17- 08/01/17)
Result (12/05/ /05/17)
PASS/FAIL
comments 3G to to A
Cell Availability
Maintain/Improved
99.91
99.95
Pass A
CSSR_AMR
99.73
99.43
Fail
Refer to OSS Justification A
CSSR_PS
99.66
99.72 A
AMR Call Drop Ratio
0.27
0.17 A
PS Service Drop Ratio
0.66
0.76 A
SHO Success Rate (AMR Service)
99.98
99.93 A
SHO Success Rate (PS Service)
99.96
99.87 A
HS-DSCH Service Cell Change Success Rate
99.16 A
HSDPA RAB Setup Success Rate
98.63
98.72 A
HSUPA RAB Setup Success Rate
99.80
99.84 A
HSDPA Retainability
0.77
0.85 A
HSUPA Retainability
0.74
0.83 A
CS Inter-RAT Handover Success Ratio
99.82
99.83 A
CS Inter-Frequency HHO Success Rate
99.00
97.98 A
PS Inter-Frequency HHO Success Rate
98.51
97.81 A
RTWP A
PRACH propagation delay(KM)
0.82 A
CS Traffic(Erl) A
CS RAB attempt
PS RAB attempt A
PS traffic(MB)
© Ericsson AB 2016

4. 3g CSSR_AMR justification
CA Project
3g CSSR_AMR justification
1.CSS_AMR didn’t pass the target and is 99.43% ,only 0.30% degraded compared with baseline.
2 The KPI degraded from 15st March, and the feature FDpchSrbOnHsdpa was activated that time with KNRN15.the KPI was influenced.
© Ericsson AB 2016

5. 3g PS Service Drop Ratio justification
CA Project
3g PS Service Drop Ratio justification
1.PS drop didn’t pass the target and is 0.76% ,only 0.10% degraded compared with baseline.
2. The KPI degraded from 15st March, and the feature FDpchSrbOnHsdpa was activated that time with KNRN15.the KPI was influenced.
© Ericsson AB 2016

6. F-dpch AND SRB ON HSDPA FEATURE INTRODUCTION
Advantage:
The SRB on HSDPA feature provides faster signaling in the downlink, which results in a decrease in time for RAB establishment and other transitions, such as PDP Context Activation time, Speech Call Setup time, Cell Change time and Channel Switching.
Disadvantage:
Having moved the SRB flow to HS, the signaling is only carried over the HS-DSCH serving cell. Thus, the SRB is not subjected to soft/softer handover. As a result, there is a risk of increased number of drops with SRB on HS.

7. 3G SHO Success (cs) Rate justification
CA Project
3G SHO Success (cs) Rate justification
1. The weekly SHO SR CS is 99.93% while the baseline is 99.98%.
2. The KPI degraded due to cell EA60465_4_3 overshooting, the weekly SHO SR CS is 97.37% .site EA60465 is margin site , in order to cover larger area, the KPI is accepted.
© Ericsson AB 2016

8. 3G SHO Success (ps) Rate justification
CA Project
3G SHO Success (ps) Rate justification
1. The weekly SHO SR PS is 99.87% while the baseline is 99.96%.
2. The KPI degraded due to cell EA60465_4_3 overshooting, the weekly SHO SR PS is 97.05% .site EA60465 is margin site , in order to cover larger area, the KPI is accepted.
© Ericsson AB 2016

9. 3G HS-DSCH Service Cell Change Success Rate justification
CA Project
3G HS-DSCH Service Cell Change Success Rate justification
HS-DSCH Service Cell Change Success Rate was 99.16% (0.82% less than the baseline) .
The KPI degraded from 15st March, and the feature FDpchSrbOnHsdpa was activated that time with KNRN15.the KPI was influenced.
© Ericsson AB 2016

10. 3G HSDPA Retainability justification
CA Project
3G HSDPA Retainability justification
HSDPA retainability was 0.87% ,0.08% less than the baseline.
HSUPA RAB Setup Success Rate was 0.83% ,0.09% less than the baseline.
The KPI degraded from 15st March, and the feature FDpchSrbOnHsdpa was activated that time with KNRN15.the KPI was influenced.
© Ericsson AB 2016

11. 3G cs inTer freq hho justification(1/2)
CA Project
3G cs inTer freq hho justification(1/2)
CS Inter-frequence HHO SR didn’t pass the target and is 98% ,only 1% degraded compared with baseline.
there were no data from 10th to 17th April and executed the CR at 10th April. The KPI was influenced.
the analysis for top offenders are shown in next slides.
© Ericsson AB 2016

12. 3G cs inTer freq hho justification(2/2)
CA Project
3G cs inTer freq hho justification(2/2)
The top offenders of IFHO_CS are shown in
below table
IFHO_CS degraded after 10Apr CR done
Daily HO failure was less than 10 times, it is just
normal fluctuation.
Normal fluctuation due to less samples, suggest keeping
monitoring
UCell Id
UtranRelation
IFHO_CS(%)
IFHO_CS_Failure
EW30074_3_2
EW30074_1_2
94.28 17
EW30008_1_2
EW30008_2_2
97.92
EW30007_1_2
EW30007_2_2
98.06 15
EW30008_1_3
EW30008_2_3
98.88 19
© Ericsson AB 2016

13. 3G ps inTer freq hho justification(1/2)
CA Project
3G ps inTer freq hho justification(1/2)
PS Inter-frequence HHO SR didn’t pass the target and is 97.79% ,only 0.72% degraded compared with baseline
there were no data from 10th to 17th April and executed the CR at 10th April. The KPI was influenced.
the analysis for top offenders are shown in next slides.
© Ericsson AB 2016

14. 3G ps inTer freq hho justification(2/2)
CA Project
3G ps inTer freq hho justification(2/2)
The top offenders of IFHO_PS are shown in below table
IFHO_PS degraded after 10Apr CR done
Daily HO failure was very few,, it is just normal fluctuation.
Normal fluctuation due to less samples, suggest keepingmonitoring
UCell Id
UtranRelation
IFHO_CS(%)
IFHO_CS_Failure
IFHO_PS(%)
IFHO_PS_Failure
pmCellDowntimeAuto
EW30074_3_2
EA30074_4_2
95.02 12
92.17
134
1979
EW60397_2_2
EA30397_4_2
93.79 11
97.65
116
EW60397_1_2
99.05 3
142
EW60397_2_3
EA30397_4_3
99.62 2
99.04
144
© Ericsson AB 2016

15. CA Project
3G rtwp justification
RTWP didn’t pass the target and is only 0.55 increased compared with baseline,
RTWP increased a little due to PS traffic increased.
© Ericsson AB 2016

16. CA Project
© Ericsson AB 2016