RANKPI RU10* © Nokia Siemens Networks RN31583EN20GLA0
Overview of 3G KPI
Field Measurement KPI
* © Nokia Siemens Networks RN31583EN20GLA0
Factors Affecting Network Performance
Many factors and network elements can affect the network performance. Here are some of the main examples:
Quality of network equipment, both hardware and software – BTS, RNC, PS Core, CS Core and transmission equipment
Performance of UE and field measurement tools – inter-operability, sensitivities of measurement parameters, level of accuracy
Quality of network planning and optimisation – coverage, interference, parameter tuning, capacity dimensioning
Quality of network implementation - site and network equipment installation, integration and commissioning
Quality of network operation and maintenance
Multi-vendor environment – Application servers, IP Backbone
Measurement method – test setup, service dependent, cluster or system level, area type (dense urban, urban, suburban, rural).
* © Nokia Siemens Networks RN31583EN20GLA0
Field Measurement KPI can be classified into the following categories:
Coverage
Accessibility
Retainability
The RAN KPI can be classified into the following categories :
Accessibility
Retainability
Usage
Mobility
Throughput
X
Retainability:
Mobility:
Drive test routes definition
Drive test equipment check
Collection of Cluster data
Installation check (crossed feeder, azimuth, tilt)
Alarm check (no 2 or 3 star alarms)
Neighbour list verification
Parameter consistency check
Collection of raw data
Process of raw data (with Actix analyzer, TOM analyzer, excel)
Exclusion area need to be taken into account
Planning tool comparsion with real measurements
Recommendations and supporting data for performance improvement
Change of antenna tilt and/or bearing
Formal report of network performance and comparison with KPI targets
Analysis &
Report
A proposal for network performance improvement, along with supported data
Escalation of issues outside planning/optimisation control
Approval of proposed recommendations
Tuning with Network loading might be needed
Parameter Optimisation
Site specific parameters (cell reslection, SHO, Admission control, ISHO etc.)
Global parameter settings for the whole network for different
services
Ues
* © Nokia Siemens Networks RN31583EN20GLA0
Focus for inter-cluster interworking- a new route will be defined across the clusters. Key routes in the city will be taken into account
Analysing of the results
Investigation of bad quality
sub optimal site placement
Remember to check that
the latest RNC and WBTS SW are implemented to the network
the latest recommended parameter settings are implemented to the network
Verification
Coverage (per
area type)
Service Setup Success Ratio, RT Service Other Than Voice [%]
100*(nbr_of_successful_call_setup_att_rt_service)/(nbr_of_call_setup_att_rt_serv
ice)
100*(nbr_of_successful_call_setup_att_nrt_service)/(nbr_of_call_setup_att_nrt_s
Service Setup Delay, RT Service Other Than Voice [sec] Average(call_setup_delay_rt_service)
Service Setup Delay, NRT Service [sec] Average(call_setup_delay_nrt_service)
Accessibility
Service Complete Ratio, RT Service Other Than Voice [%]
100*(nbr_of_normal_rel_call_rt_service)/(nbr_of_successful_call_setup_att_rt_se
100*(nbr_of_normal_rel_call_nrt_service)/(nbr_of_successful_call_setup_att_nrt_
Average Round Trip Delay, NRT Service [msec] Average(rtd_32bytes)
Mobility
Service Quality