LTE KPIs Calculation

LTE KPIs Calculation using TEMS Discovery 13.0 Internal use

LTE KPIs Calculation Using TEMS Discovery 13.1.1 For LTE Radio Network Optimization

Huawei Technologies Co., LTD

All rights reserved reserved


Release history Date

Version

Description

Author

2012-05-22

V1.00

Draft

Ahmed Awwad


Content

i. ii. iii. iv. v. vi. vii. viii. ix. x.

TEMS Discovery start and Log Files data base creation Log Files validation after receiving from the DT team Download Throughput calculation Upload Throughput calculation Ping Latency Handover Success Rate Ps session Drop rate ERAB Setup Success Rate EPS Bearer Setup Time ERAB Setup Time

A. Summary

C. KPIs Calculation


I.

TEMS Discovery start and Log Files data base creation

1. Open TEMS Discovery then Create New project and name it as example (LOS_020_R1_DL)

2. Import the log files (Note: takes long time so start importing at least 4 hours before you will start work in the cluster)

3.

After importing the logfiles open the

LTE KPIs Calculation using TEMS Discovery 13.0 Internal use project by duple click , you will find the log files in DataSets folder and they are separated. 4. To get all the log files in one file so you can anlyize the whole cluster or area , so right click on Composite and open create/Edit Static Composite DataSet

LTE KPIs Calculation using TEMS Discovery 13.0 Internal use 5. Drag and drop the file DL into the data base field then save it , so now you can open the whole project from the Composite folder , create 3 different

folders for the uplink , downlink & Ping

II.

Log Files validation after receiving from the DT team


1. Open the DL folder, to check that the DT data is complete and there are no missing parts in the routes , so open GPS Positions then send to Map View , this is the layer that you will

2. Send the FTP throughput to the map and compare with the GPS layer , example (the part inside the blue circle is missing in this DT logs , but it is very small to care , if such part is long so you need to ask the DT team to


re-drive it , Now all the log files are ok, and we can start calculating the KPIs

III.

Download Throughput calculation

1. Now to get the values for the DL Throughput, send it to table view (Data Service FTP Download - FTP Download Throughput Current (Kbps)) 2. Also drag to the table the RF conditions with the 2 values (SNR , RSRP)

3. Save the table to excel sheet

LTE KPIs Calculation using TEMS Discovery 13.0 Internal use 4. Count the number of rows after removing the blanks ,record d this number , then filter for the values greater than or equal 15000 , then count the number of rows

% of High Throughput data =100* ( # of samples >=15000 / # all samples) Average Throughput & Max throughput could be easily calculated Note 1 : this value 15000 kbps could be different from project to another according to the contracted KPIs Note 2 : as the LTE is a new technology so there is a lot of areas which is not covered yet by LTE sites , so those areas & surroundings will have a very low throughput due to low RSRP & SNR , and that will harmfully affecting the acceptance of the clusters , so what we should do and that also should be in the contract is to recalculate the high throughput samples after filtering out the samples which has RSRP <= -110 & SNR <= -3 , that what we will see at next step . 5. do the same process after filtering the RSRP Greater than or equal -110 and filter the SNR greater than or equal -3 , then calculate the % high throughput data , Average & Max throughput

IV.

Upload Throughput calculation

1. To get the values for the UL Throughput, send it to table view (Data Service FTP UPload - FTP UPload Throughput Current (Kbps))


2. Also drag to the table the RF conditions with the 2 values (SNR , RSRP)

LTE KPIs Calculation using TEMS Discovery 13.0 Internal use 3. Save the table to excel sheet

4. C

ount the number of rows after removing the blanks ,record d this number , then filter for the values greater than or equal 5000 , then count the number of rows % of High Throughput data =100* ( # of samples >=5000 / # all samples) Average Throughput & Max throughput could be easily calculated Note 1 : this value 5000 kbps could be different from project to another according to the contracted KPIs Note 2 : as the LTE is a new technology so there is a lot of areas which is not covered yet by LTE sites , so those areas & surroundings will have a very low throughput due to low RSRP & SNR , and that will harmfully affecting the acceptance of the clusters , so what we should do and that also should be in the contract is to recalculate the high throughput samples after filtering out the samples which has RSRP <= -110 & SNR <= -3 , that what we will see at next step . 5. do the same process after filtering the RSRP Greater than or equal -110 and filter the SNR greater than or equal -3 , then calculate the % high throughput data , Average & Max throughput


V.

Ping Latency

1. Open the ping Project; check the logs competency as before 2. Send to table view the item shown below

3. Save the table to excel sheet

LTE KPIs Calculation using TEMS Discovery 13.0 Internal use 4. Because the RSRP and SNR are not showing in front of the ping time , so remove one row up to have values in front of

5. Get the Average , max and min for the Note 1 : as the LTE is a new technology so there is a lot of areas which is not covered yet by LTE sites , so those areas & surroundings will have a very low throughput due to low RSRP & SNR , and that will harmfully affecting the acceptance of the clusters , so what we should do and that also should be in the contract is to recalculate the high throughput samples after filtering out the samples which has RSRP <= -90 & SNR <= 15 (those values are different from project to another according to the contracted KPIs). 6. Do the same process after filtering the RSRP Greater than or equal -90 and filter the SNR greater than or equal 15 , then calculate the Average , Max and Min latency .

VI.

Handover Success Rate

1. Open the Ping project and send to table view the handover failures as shown below 2. From the Below snap we can see that the total attempts = 847+2 = 849 & the number of handover failures = 2 3. So the HOSR = 100-(100*number of handover failures / total number of attempts )=847*100/849


4. Export the table into excel sheet to check the handover failures


5. So now you see that the 2 handover failures happened at Times 10:21:36.093 & 12:46:29.000 6. To analyze the handover failure signaling , Open the LTE RRC Signaling and send to message view

VII.

Ps session Drop rate

1. Send LTE NAS signaling and LTE RRC signaling to table view


2. Export the messages to Test file, then open and save it as Excel file to be input

for the KPI tool

LTE KPIs Calculation using TEMS Discovery 13.0 Internal use 3. Open the KPI tool and reset and input the messages file that you prepared in excel format

4. Press KPIs statistics and unselect all except EPS Bearer Setup Time(Avg)

5. The PS drop rate will appear in the table as seen below , to check the drop call signaling just press in on it as shown below


VIII.

ERAB Setup Success Rate

1. Press KPI statistics and select ERAB Setup Success Rate

2. The ERAB Setup Success Rate will appear in the table as seen below , to check the ERAB Setup fail just press in on it as shown below

IX.

EPS Bearer Setup Time

LTE KPIs Calculation using TEMS Discovery 13.0 Internal use 1. Press KPI statistics and select ERAB Setup Success Rate

2. The EPS Bearer Setup Time will appear in the table as seen below

X.

ERAB Setup Time Same procedures as step i.1 then you will find ERAB Setup time in the table below

D. Summary This document briefly described the most important LTE KPIs that the operators will be searching for while having a new LTE network, TEMS discovery is a sufficient tool that we can use to calculate LTE KPIs in an accurate way


LTE KPIs Calculation

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