lte kpis calculation

23
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

Upload: buterlifes

Post on 30-Nov-2015

904 views

Category:

Documents


30 download

TRANSCRIPT

Page 1: 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

Page 2: LTE KPIs Calculation

LTE KPIs Calculation using TEMS Discovery 13.0 Internal use

Release history

Date Version Description Author

2012-05-22 V1.00 Draft Ahmed Awwad

Page 3: LTE KPIs Calculation

LTE KPIs Calculation using TEMS Discovery 13.0 Internal use

ContentA. Abstract

Most of the LTE networks now all over the world is a prelaunch networks ,DT KPIs plays an important role now in those LTE networks , as the acceptance(PAC) for the prelaunch networks is mainly depends on the DT KPIs , because the OSS KPIs only available if the network has a traffic and that is for the post launch networks .TEMS Discovery tool is very effective in this KPIs calculation and analysis, but still the methodology of KPIs calculating should be the same.This paper makes the reader aware of the LTE main KPIs for the preLaunch networks, and enables the reader to calculate them in the proper way.

B. Background

To test the LTE network serviceability from the radio network planning and optimization point of view, it is needed to check 4 main different categories of KPIs,

Accessibility EPS bearer setup time, Ping eUTRAN (EPS bearer active)PS session setup success rate eUTRANMobility Handover Success Rate eUTRAN Retain ability PS session drop rate eUTRAN, Service integrity FTP DL Throughput, FTP UL Throughput

C. KPIs Calculation

i. TEMS Discovery start and Log Files data base creation

ii. Log Files validation after receiving from the DT team

iii. Download Throughput calculation

iv. Upload Throughput calculation

v. Ping Latency

vi. Handover Success Rate

vii. Ps session Drop rate

viii. ERAB Setup Success Rate

ix. EPS Bearer Setup Time

x. ERAB Setup Time

D. Summary

Page 4: LTE KPIs Calculation

LTE KPIs Calculation using TEMS Discovery 13.0 Internal use

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)

Page 5: LTE KPIs Calculation

LTE KPIs Calculation using TEMS Discovery 13.0 Internal use

3. After importing the logfiles open the 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

5. Drag and drop the file <TD>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

Page 6: LTE KPIs Calculation

LTE KPIs Calculation using TEMS Discovery 13.0 Internal use

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))

Page 7: LTE KPIs Calculation

LTE KPIs Calculation using TEMS Discovery 13.0 Internal use

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

3. Save the table to excel sheet

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

Page 8: LTE KPIs Calculation

LTE KPIs Calculation using TEMS Discovery 13.0 Internal use

% 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))

Page 9: LTE KPIs Calculation

LTE KPIs Calculation using TEMS Discovery 13.0 Internal use

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

Page 10: LTE KPIs Calculation

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

Page 11: LTE KPIs Calculation

LTE KPIs Calculation using TEMS Discovery 13.0 Internal use

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

Page 12: LTE KPIs Calculation

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

Page 13: LTE KPIs Calculation

LTE KPIs Calculation using TEMS Discovery 13.0 Internal use

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

Page 14: LTE KPIs Calculation

LTE KPIs Calculation using TEMS Discovery 13.0 Internal use

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

Page 15: LTE KPIs Calculation

LTE KPIs Calculation using TEMS Discovery 13.0 Internal use

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

3. Open the KPI tool and reset and input the messages file that you prepared in excel format

Page 16: LTE KPIs Calculation

LTE KPIs Calculation using TEMS Discovery 13.0 Internal use

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

Page 17: LTE KPIs Calculation

LTE KPIs Calculation using TEMS Discovery 13.0 Internal use

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

Page 18: LTE KPIs Calculation

LTE KPIs Calculation using TEMS Discovery 13.0 Internal use

IX. EPS Bearer Setup Time

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

Page 19: LTE KPIs Calculation

LTE KPIs Calculation using TEMS Discovery 13.0 Internal use

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