48558103 03 Single Site Verification

8/6/2019 48558103 03 Single Site Verification

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HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential

Foreword

Single site verification is the first step of optimization Single site verification confirm the working state of each site




Objectives Upon completion of this course, you will be able to:

Know the steps of single site verification

Know how to do single site verification

Know how to solve the ordinary problems in single site

verification




Contents Preparation of Single Site Verification

Test Content of Single Site Verification

Typical Problems Analysis in Single Site Verification




Preparation of Single Site Verification Site state check

Check the site state by RNC LMT or M2000

DSP CELL




Preparation of Single Site Verification Site state check

Result




Preparation of Single Site Verification Configuration data collection

RNC Configuration file collection

Without parameters, the file will be saved at FTP directory under

BAM main path and file name can be specified by user, default

CFGMML-YearMonthDateHourMinSec.txt.




Preparation of Single Site Verification Configuration data collection

RNC configuration parameter checking by GENEX Nastar NODEBNAME

LOCELL ID

MAXTXPOWER

LAC

RAC

Scramble PSCRAMBCODE

Frequency UARFCNDOWNLINK




Preparation of Single Site Verification Test location and route choose principle

The right test point meeting the following conditions: Where the signals of target cell are strong

Where the signals of other cells are weak




Preparation of Single Site Verification Test location and route choose principle

For better performance, the following methods can betaken:

Disable power amplifiers of other cells except the cell to

be measured

If cannot disable other cells, the testing point should be

near the center of the cell, with line-of-sight distance to

the NodeB – For a macro cell, testing point should be less than 100

meters from NodeB in the direction of major beam of cell

antenna, with line-of-sight distance to NodeB.




Test Content of Single Site Verification Verification in Idle Mode

Frequency Check Downlink frequency channel number = DL Frequency * 5

For example

– UE shows the DL frequency is 2117.40

– The DL frequency point number is 10587





Verification in Idle Mode

Cell ID Check

Check whether the LAC/RAC of the cell to be measured is consistent

with the planed one





Scrambling code Check At the right place, UE will show

– PSC in active set, including the signal level

– PSC in monitor set, including the signal level





LAC/RAC Check Check whether the LAC/RAC of the cell to be measured is consistent

with the planed one





CPICH_RSCP/CPICH_EcIo (Near Site) Test Method

– In the major transmission direction of antenna, fix a location with line-of-

sight distance from the antenna within 100 meters from the NodeB

– Test UE shows the signal level, including RSCP and Ec/Io

Bench Mark Value

– For macro cells, CPICH RSCP > –75 dBm

– For micro cells, CPICH RSCP > –60 dBm

– For no-load cells, CPICH Ec/Io > –8 dB

– For load-on cells, CPICH Ec/Io > –10 dB




Test Content of Single Site Verification Verification in Connected Mode

Originating and Terminating Connection Test of Voice Service Method

– Use two handsets to call each other for five times.

– Record the originating and terminating connection conditions





Originating and Terminating Connection Test of VP Service Method

– Use two handsets to call each other for five times.

– Record the originating and terminating connection conditions





Connection Test of PS Services Method

– Originating function of PS services by handset online service

– Pay attention to the throughput




Test Content of Single Site Verification Drive Test for Coverage of the Site

Method Prepare the NodeB location map

need to cover major streets around the NodeB

Output area coverage map based on the pilot signals received byscanner

Compare the CPICH RSCP and Ec/Io distribution of each cell




Test Content of Single Site Verification HSDPA Access Function Test

Preparation for HSDPA Test

Check defined downlink rate of the test USIM card

Check the related HSDPA parameters in RNC configuration file with

LST FRC and ensure USIM card subscribe rate is equal or greater

DlBeTraffDecThs

Prepare the DT software with HSDPA test function module

Prepare the terminal with HSDPA function and category

– Huawei E870, category 8, 7.2Mbps






Test Content of Single Site Verification HSDPA Access Function Test

Method Origination high speed downloading service, such FTP download




Test Content of Single Site Verification Antenna Diversity Check

Method 2

Connect the Tx/Rx feeder to the Rx ports and the Rx feeder to the

Tx/Rx port.

Compare the CPICH RSCP before and after exchanging feeders.

– If the difference of CPICH RSCP before and after exchanging feeders is

more than 20 dB, the diversity receiver antenna is improperly connected




Weak Coverage Problem Analysis Phenomenon

In single site verification drive test, the signal level is very bad in

200m with line-of-sight

No blocking

Analysis

Check the alarm information (VSWR) – no alarm

Check the feeder system

Downtilt angle – OK

Azimuth – OK

Connector – OK




Weak Coverage Problem Analysis Analysis

Check configuration file

The parameters related to CPICH power – OK

– 33dBm, and the maximum transmission power for the cell 20W.





Check the output power of the cell





Base on the output power examination, the problem is located on

the PA problem

Solution

Change the PA

Re-test

Signal level back to normal




Antenna Diversity Problem Analysis

In single site verification, antenna receiving diversity should be

checked

Phenomenon

Without subscriber, the RTWP test shows





Phenomenon

Set the UE with maximum transmission power in 10111, the cell

10111 and 10112 RTWP increased at the same time,





Phenomenon

Set the UE with maximum transmission power in 10112, same

problem happened

Result

The receiving diversity antenna of cell 10111 and 10112 are

connected crossly.

Adjustment

Exchange the receiving diversity antenna of these two cells





Re-test

Set the UE with the maximum transmission power in Cell 10111,

check the RTWP of 10111 and 10112, only the RTWP of 10111

increased, the problem was resolved




Summary Single site verification

Preparation

Test contents

Typical problems analysis



Thank youwww.huawei.com

48558103 03 Single Site Verification

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