Huawei WCDMA RNO Single Site Verification

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ISSUEISSUE

WCDMA RNO Single Site Verification

WCDMA RNO Single Site Verification

1.01.0

2Confidential Information of Huawei. No Spreading without Permission.

Security Level: Internal

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 ContentsCourse Contents



Single Site Verification OverviewSingle 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 call access, call

quality, handover and so on.




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.

Agilent E6455C;

Test UE, used for service verification and system message

collection. Qualcomm 6200 & Motorola A835 mobile;

Data collection software, used to display and log the signal

strength, UE status, signal message and so on in time. Agilent

E6474A software;

Data analysis software, used to resolve message, analysis

signal, solve problem and so on. Actix Analyzer software.










Single Site Verification PreparationSingle 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




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.




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.




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: the scrambling code, power

setting, neighbor cell list, handover parameter etc.










Site Checklist.xls

Single Site VerificationSingle Site Verification

Site Verification Items:

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

Test

Settings: Frequency & SC, Cell reselection parameters,

LAC/RAC, Neighbor List.

Functions: LA/RA update, 3G<->2G Cell reselection, SMS (MT

& MO), Voice (MT & MO), VP (MT & MO), PS Attach & Detach,

PS service, Voice/VP/PS soft handover, Voice 3G->2G

handover.




Test Process 1

Items: LA update / RA update / PS Attach

Purpose: Verify the LA update and RA update functions are

normal, the PA attach function is normal.

Method: Power on the Qualcomm mobile, if the ‘WCP’ indication

is shown on the mobile screen, it means the LA update

procedure is OK, the RA update procedure is OK, the PS attach

is OK.

Notes: If the ‘WC’ is shown on the mobile, it means the LA

update is OK. If the ‘P’ is shown on the mobile, it means the RA

update and the PS attach is OK.




Test Process 2

Items: PS Detach

Purpose: Verify the PA detach function is normal

Method: Choose “Menu -> 5 -> 9 -> 2” on Qualcomm mobile, if

the ‘WCP’ indication is changed to ‘WC’ indication on the mobile

screen, PS detach is OK.

Notes: N/A




Test Process 3

Items: Frequency and Scrambling Code

Purpose: Check the frequency and scrambling code for the

verified cell is right or not. If it’s wrong, maybe the parameter

setting or the Tx antenna installation have some mistake.

Method: Setup the Agilent E6474A software, observe cell

frequency and scrambling code from UMTS CPICH View

window. Check the frequency and scrambling code for the

verified cell is as same as planning.

Notes: N/A







Test Process 4

Items: CPICH RSCP and CPICH Ec/Io

Purpose: Check the CPICH RSCP and CPICH Ec/Io for

the verified cell is normal or not. If it’s abnormal, maybe

the Tx antenna installation or the downlink interference

have some problems.

Method: In the Agilent E6474A software, observe CPICH

RSCP and CPICH Ec/Io from UMTS Status View window.

Check if CPICH RSCP is higher than -85dBm and CPICH

Ec/Io is higher than -8dB.




Notes:

The mobile shall be near the site

The CPICH RSCP and Ec/Io can be seen from

scanner or Qualcomm mobile. Use the Qualcomm

mobile to check the CPICH RSCP and CPICH Ec/Io.

When we use the Qualcomm mobile to check the

CPICH RSCP and CPICH Ec/Io, the Io and Ec/Io shall

be obtained, the CPICH RSCP shall be obtained

through calculation: Ec = Ec/Io + Io







Test Process 5

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

feel.

Notes: Qualcomm or Motorola mobile




Test Process 6

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 feel.

Notes: Motorola mobile




Test Process 7

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 feel.

Notes: Qualcomm or Motorola mobile




Test Process 8

Items: SMS (MT & MO)

Purpose: Verify the SMS function is normal

Method: Make the dialing test of 3G SMS service between two

3G mobiles, one for the terminating call and another one for the

originating call.

Notes: Motorola mobile




Test Process 9

Items: Cell reselection parameters, LAC/RAC, Neighbor List

Purpose: Check the parameters setting for the verified cell.

Method: UE shall read the system information when UE is in idle

mode. Collect UE reserved message and check the parameters

with Actix Analyzer software after the drive test.

Notes:

Cell reselection parameters: SIB3

LAC/RAC: SIB1

Neighbor list: SIB 11




Test Process 10

Items: 3G->2G voice handover, 3G->2G cell reselection, 2G-

>3G cell reselection

Purpose: Verify the 3G->2G handover and 3G<->2G cell

reselection functions are normal.

Method: Find a place where there is 2G signal without 3G signal.

One mobile is keeping a voice call and another one is in idle

mode. Move from 3G to 2G, the mobile with voice call shall

handover to 2G and the mobile in idle mode shall reselect to 2G.

Move from 2G to 3G, the mobile in idle mode shall reselect to

3G.

Notes: Use the Motorola mobile to do the test, the ‘3G’ or ‘2G’

indication is shown on the mobile screen




Test Process 11

Items: Antenna swapping test

Purpose: Verify the Rx feeder installation is right.

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







Test Process 12

Items: Soft handover (Voice, VP, PS)

Purpose: Verify the soft handover function is normal

Method: Take a speech service or VP service or PS service call

and keep it. Verify the soft handover from one sector to another

sector. During the process, observe the CPICH scrambling code

changing from Agilent UMTS CPICH View, and observe the

active set update message from UMTS Protocol Messages

View.

Notes: N/A










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.




Notice items 1: Test Point Choice

We shall choose the test point where the CPICH RSCP of 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.




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.




Notice items 3: Antenna Swapping Test Purpose

If the receive antenna crossed, the uplink diversity receive gain

is loss, and the uplink interfere is doubled. It will affect the uplink

capability.










Problem Example for Site Verification 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.



AnswersAnswers

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.



AnswersAnswers

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.



Documents

Huawei WCDMA RNO Single Site Verification