11 single site verification
TRANSCRIPT
-
8/6/2019 11 Single Site Verification
1/37
www.huawei.com
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential
Single Site Verification
-
8/6/2019 11 Single Site Verification
2/37
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
-
8/6/2019 11 Single Site Verification
3/37
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential
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
-
8/6/2019 11 Single Site Verification
4/37
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential
Contents
Preparation of Single Site Verification
Test Content of Single Site Verification
Typical Problems Analysis in Single Site Verification
-
8/6/2019 11 Single Site Verification
5/37
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential
Preparation of Single Site Verification
Site state check
Check the site state by RNC LMT or M2000
DSP CELL
-
8/6/2019 11 Single Site Verification
6/37
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential
Preparation of Single Site Verification
Site state check
Result
-
8/6/2019 11 Single Site Verification
7/37
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential
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.
-
8/6/2019 11 Single Site Verification
8/37
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential
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
-
8/6/2019 11 Single Site Verification
9/37
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential
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
-
8/6/2019 11 Single Site Verification
10/37
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential
Preparation of Single Site Verification
Test location and route choose principle
For better performance, the following methods can be
taken:
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.
-
8/6/2019 11 Single Site Verification
11/37
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential
Contents
Preparation of Single Site Verification
Test Content of Single Site Verification
Typical Problems Analysis in Single Site Verification
-
8/6/2019 11 Single Site Verification
12/37
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential
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
-
8/6/2019 11 Single Site Verification
13/37
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential
Test Content of Single Site Verification
Verification in Idle Mode
Cell ID Check
Check whether the LAC/RAC of the cell to be measured is consistent
with the planed one
-
8/6/2019 11 Single Site Verification
14/37
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential
Test Content of Single Site Verification
Verification in Idle Mode
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
-
8/6/2019 11 Single Site Verification
15/37
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential
Test Content of Single Site Verification
Verification in Idle Mode
LAC/RAC Check
Check whether the LAC/RAC of the cell to be measured is consistent
with the planed one
-
8/6/2019 11 Single Site Verification
16/37
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential
Test Content of Single Site Verification
Verification in Idle Mode
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
-
8/6/2019 11 Single Site Verification
17/37
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential
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
-
8/6/2019 11 Single Site Verification
18/37
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential
Test Content of Single Site Verification
Verification in Connected Mode
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
-
8/6/2019 11 Single Site Verification
19/37
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential
Test Content of Single Site Verification
Verification in Connected Mode
Connection Test of PS Services
Method
Originating function of PS services by handset online service
Pay attention to the throughput
-
8/6/2019 11 Single Site Verification
20/37
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential
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 by
scanner
Compare the CPICH RSCP and Ec/Io distribution of each cell
-
8/6/2019 11 Single Site Verification
21/37
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential
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
LSTFRCand 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
Huawei E620, category 12, 1.8Mbps
Huawei E220, category 6, 3.6Mbps
-
8/6/2019 11 Single Site Verification
22/37
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential
Test Content of Single Site Verification
HSDPA Access Function Test
Method
Origination high speed downloading service, such FTP
download
-
8/6/2019 11 Single Site Verification
23/37
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential
Test Content of Single Site Verification
Antenna Diversity Check
Objectivity
Check whether the antenna for receiving diversity signals is
reversely connected
-
8/6/2019 11 Single Site Verification
24/37
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential
Test Content of Single Site Verification
Antenna Diversity Check
Method 1
In the cell to be measured, set UE transmits signals with the fixed
maximum power
Check the RTWP of the cell to be measured and the neighbor cells
If the RTWP of the corresponding cell increases only and the RTWP of
neighbor sectors changes less, the diversity receiver antenna is correctly
connected
If the RTWP of corresponding cell and other sectors increases at the
same time, the diversity receiver antenna is improperly connected
-
8/6/2019 11 Single Site Verification
25/37
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential
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
-
8/6/2019 11 Single Site Verification
26/37
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential
Contents
Preparation of Single Site Verification
Test Content of Single Site Verification
Typical Problems Analysis in Single Site Verification
-
8/6/2019 11 Single Site Verification
27/37
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential
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
-
8/6/2019 11 Single Site Verification
28/37
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential
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.
-
8/6/2019 11 Single Site Verification
29/37
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential
Weak Coverage Problem Analysis
Analysis
Check the output power of the cell
-
8/6/2019 11 Single Site Verification
30/37
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential
Weak Coverage Problem Analysis
Analysis Check the output power of the cell
-
8/6/2019 11 Single Site Verification
31/37
-
8/6/2019 11 Single Site Verification
32/37
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential
Antenna Diversity Problem Analysis
In single site verification, antenna receiving diversity should be
checked
Phenomenon
Without subscriber, the RTWP test shows
-
8/6/2019 11 Single Site Verification
33/37
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential
Antenna Diversity Problem Analysis
Phenomenon Set the UE with maximum transmission power in 10111, the cell
10111 and 10112 RTWP increased at the same time,
-
8/6/2019 11 Single Site Verification
34/37
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential
Antenna Diversity Problem Analysis
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
-
8/6/2019 11 Single Site Verification
35/37
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential
Antenna Diversity Problem Analysis
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
-
8/6/2019 11 Single Site Verification
36/37
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential
Summary
Single site verification
Preparation
Test contents
Typical problems analysis
-
8/6/2019 11 Single Site Verification
37/37
Thank youwww.huawei.com