05-wcdma rno single site verification

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WCDMA RNO Single Site Verification

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HUAWEI TECHNOLOGIES CO., LTD. HUAWEI Confidential

Chapter 4 Problem example for site verification

Chapter 3 Single site verification

Chapter 2 Single site verification preparation

Chapter 1 Single site verification overview

Course Contents


Single Site Verification Overview



Purpose: The single site verification test is a part of the WCDMA network optimization to ensure that the basic functions of the cell are normal, such as coverage ,call access, call quality, parameter setting and so on.


Single Site Verification Overview Content: Through the single site function verification, the following

functions for each cell shall be checked as normal :

Verify coverage ( CPICH RSCP & Ec/Io )

Verify scrambling code

Verify no installation faults (e.g. crossed feeders)

Make service call test



Tools:

Drive test scanner, used for collecting the pilot signal data. DTI;

Test UE, used for service verification and system message collection. Huawei 626;

Data collection software, used to display and log the signal strength, UE status, signal message and so on in time. Genex Probe;

Data analysis software, used to resolve message, analysis signal, solve problem and so on. Genex Assistant.






Course Contents


Single Site Verification Preparation Before the single site verification, we should only ensure the following

conditions have been met.

Alarm Check

Cell Status Check

Parameter Check


Single Site Verification Preparation Alarm Check

The product support engineer will be responsible for checking and resolving all the alarms. It is important for the optimization engineer prior to any field test to check with product support engineer regarding any alarms especially intermittent alarms.


Single Site Verification Preparation Cell Status Check

The product support engineer will be responsible for checking and resolving all the cell state problems. It is important for the network optimization engineer prior to any field test to confirm with product support engineer regarding cell state.


Single Site Verification Preparation

Parameter Check

The optimization engineer need to ensure the radio part parameters configuration list has been achieved. In the list the radio part parameters includes: LAC and RAC ,frequency, the scrambling code, etc.


Course Contents






Site Checklist.xls

Single Site Verification

Site Verification Items:

Installations: CPICH RSCP, CPICH Ec/Io, Rx Antenna Swap Test

Settings: Frequency & SC, LAC/RAC

Functions: Voice (MT & MO), VP (MT & MO),


Single Site VerificationTest Process 1

Items: LAC and RAC

Purpose: Verify the LAC and RAC is as same as that of planning

Method: Power on the huawei626 mobile, press the Application Program button, and select 2 WCDMA network information, RAC and LAC in the network can been seen.

Notes: if the LAC and RAC is not as same as that of RNP, we should modify it and test it again

Application program


Single Site Verification Test Process 2

Items: Frequency and Scrambling Code

Purpose: Check the frequency and scrambling code for the verified cell is right or not.

Method: Power on the huawei626 mobile, press the Application Program, and select 3 WCDMA active set/monitor set, Frequency DL and Scrambling Code in the network can been see.

Notes: If the frequency and scrambling code is not as same as that of the planning, there is some mistakes with the parameter setting or the Tx antenna installation



Items: CPICH RSCP and CPICH Ec/Io

Purpose: Check the CPICH RSCP and CPICH Ec/Io for the verified cell is normal or not.

Method: Power on the huawei626 mobile, press the Application Program, and select 3 WCDMA active set/monitor set. Check if CPICH RSCP(Ec) is higher than -85dBm and CPICH Ec/Io is higher than -8dB.

Notes: (1) The mobile shall be near the site.

(2)If it’s abnormal, maybe the Tx antenna installation or the downlink interference have some problems.



Items: Voice Call (MT & MO)

Purpose: Verify the voice call function is normal and the voice call quality is good

Method: Make the dialing test of 3G speech service between two 3G mobiles, one for the terminating call and another one for the originating call. Test the speech communication quality by your feeling.

Notes: huawei626 mobile



Items: VP Call (MT & MO)

Purpose: Verify the VP call function is normal and the VP call quality is good

Method: Make the dialing test of 3G VP service between two 3G mobiles, one for the terminating call and another one for the originating call. Test the speech and photo communication quality by your feeling.




Items: PS service

Purpose: Verify the PS function is normal and the PS quality is good.

Method: Make the dialing test of 3G PS service, which include WWW browsing and file downloading. Test the PS connection quality by your feeling.




Items: Antenna swapping test

Purpose: Verify the Rx feeder installation is right or not

Method: Switch the transmitter from one feeder to another, check the RSCP changed or not. If no change happened, it means that the feeder is correct.

Notes: Check the RSCP from scanner



Troubleshooting:

The problem recording list should be filled in and the product support engineer should be encouraged to solve the problems.

Track the problems until they are solved.


Single Site Verification Notice items 1: Test Point Choice

We shall choose the test point where the CPICH RSCP of the target sector is high enough and that of other sector is poor.

The test points should be chosen near the site and ideally with line-of-sight to the site.

The test points should not be chosen under the site as the signal of other sectors of same site is strong too.


Single Site Verification Notice items 2: Test Route Choice

The driving test route should connect the test points of the sectors. It is required that signals not be shadowed by buildings along the test route to avoid turning the test into a coverage test.

The figure below shows the way to select the test points and the test route.


Course Contents






Problem Example for Site Verification In the site verification, following problems have been found

Scrambling Code Setting is wrong: The scrambling code from scanner and mobile is different from the planning

After feeder swapped, the CPICH RSCP is 20dB lower than before.


Answers Scrambling Code Setting is wrong

The Scrambling Code may be wrong in RNC, check the datasheet in RNC.

If the Scrambling Code from scanner is the same as that of another sector in same site planned, maybe the TX/RX feeder is crossed to the another sector.


Answers After feeder swapped, the CPICH RSCP is 20dB lower than before:

The RX feeder is crossed to the antenna of another sector. In this case, the CPICH RSCP will be high in the coverage area of the other antenna. Check the connection between the feeder and the antenna.

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05-wcdma rno single site verification

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