How and Which KPI to Check before and after LTE Launch
Operator always needs to check LTE performance before commercial launch and after commercial launch and here I write how and which KPI to check.As This is general guide so it is change for different operator but it cover all KPI.
There are two types of methods for KPIs’ measurement: Field Test and Statistic Collection. Different measurement methods and KPI categories shall be taken into consideration so as to match the following two acceptance phases.
For Preliminary Acceptance (before the commercial launch), low traffic (even empty) is not able to produce sufficient traffic data to evaluate the correlative Statistics KPIs. The main purpose of Preliminary Acceptance is to verify whether the optimized cluster achieves the coverage and performance requirements or not, so the Field Test (Drive Test and Stationary Test) KPIs are recommended for this phase.
Final Acceptance (Stability Acceptance, Optional)
For Final Acceptance (after the commercial launch), statistics collection method could be introduced under the condition that a minimum amount of traffic per site at the Busy Hour is reached (the sufficient data are available). Based on worldwide experiences of LTE commercial networks, the following KPIs are suggested for Preliminary Acceptance and Final Acceptance separately.
Proposed KPIs for Preliminary Acceptance
The following table lists the proposed KPIs for Preliminary Acceptance.
Proposed KPIs for Final Acceptance (Stability Acceptance, Optional)
The following table lists the proposed KPIs for Final Acceptance.
Cluster and Test Route
The following contents present recommendation for Cluster Optimization and the selection of Drive Test Route for LTE project.
Performing optimization/acceptance per Cluster is recommended. Cluster means a group of sites (Normally 20-40 sites) which are geographically neighbor and all the eNodeBs of this test cluster should be integrated and on air, along with surrounding neighbor cells, but the actual sites number of per cluster should be flexible to allow a faster rollout and acceptance.
Drive Test Route Selection
For cluster optimization, the planning of the test route shall consider the handover performance, neighboring relations, coverage, etc. In general the test routes shall be planned according to the following criteria:
- All sectors of each site in the cluster should be covered by the drive route, if possible.
- Routes shall pass through Key business centers, major roads, shopping centers, tourist attractions and railway stations.