WCDMA RNO Single Site Verification 20050501
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Transcript of WCDMA RNO Single Site Verification 20050501
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Wireless Curriculum Development Section
ISSUE
WCDMA RNO Single Site
Verification
1.0
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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 Contents
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3Confidential Information of Huawei.
No Spreading without Permission. Security Level: Internal
Single Site Verification Overview
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4Confidential Information of Huawei.
No Spreading without Permission. Security Level: Internal
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 call access, call
quality, handover and so on.
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5Confidential Information of Huawei.
No Spreading without Permission. Security Level: Internal
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
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No Spreading without Permission. Security Level: Internal
Single Site Verification Overview
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.
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7Confidential 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 Contents
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8Confidential Information of Huawei.No Spreading without Permission. Security Level: Internal
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
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9Confidential Information of Huawei.No Spreading without Permission. Security Level: Internal
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.
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10Confidential Information of Huawei.No Spreading without Permission. Security Level: Internal
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.
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11Confidential Information of Huawei.No Spreading without Permission. Security Level: Internal
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: the scrambling code, power
setting, neighbor cell list, handover parameter etc.
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12Confidential Information of Huawei.No Spreading without Permission. Security Level: Internal
Course Contents
Chapter 4 Problem example for site verification
Chapter 3 Single site verification
Chapter 2 Single site verification preparation
Chapter 1 Single site verification overview
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13Confidential Information of Huawei.No Spreading without Permission. Security Level: Internal
Single 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, 3G2G 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.
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14Confidential Information of Huawei.No Spreading without Permission. Security Level: Internal
Single Site Verification
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 WCPindication
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 Pis shown on the mobile, it means the RA
update and the PS attach is OK.
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Confidential Information of Huawei.
No Spreading without Permission. Security Level: Internal
Single Site Verification
Test Process 2
Items: PS Detach
Purpose: Verify the PA detach function is normal
Method: ChooseMenu
-> 5 -> 9 -> 2on Qualcomm mobile, if
the WCPindication is changed to WCindication on the mobile
screen, PS detach is OK.
Notes: N/A
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Confidential Information of Huawei.
No Spreading without Permission. Security Level: Internal
Single Site Verification
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Confidential Information of Huawei.
No Spreading without Permission. Security Level: Internal
Single Site Verification
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 itsabnormal, 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.
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Confidential Information of Huawei.
No Spreading without Permission. Security Level: Internal
Single Site Verification
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
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Confidential Information of Huawei.
No Spreading without Permission. Security Level: Internal
Single Site Verification
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Confidential Information of Huawei.
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Single Site Verification
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
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Single Site Verification
Test Process 8
Items: SMS (MT & MO)
Purpose: Verify the SMS function is normal
Method: Make the dialing test of 3G SMS service between two3G mobiles, one for the terminating call and another one for the
originating call.
Notes: Motorola mobile
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Confidential Information of Huawei.
No Spreading without Permission. Security Level: Internal
Single Site Verification
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Confidential Information of Huawei.
No Spreading without Permission. Security Level: Internal
Single Site Verification
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
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Confidential Information of Huawei.
No Spreading without Permission. Security Level: Internal
Single Site Verification
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Single Site Verification
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.
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Single Site Verification
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.
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Confidential Information of Huawei.
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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.
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Confidential Information of Huawei.
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Single Site Verification
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.
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Confidential Information of Huawei.
No Spreading without Permission. Security Level: Internal
Course Contents
Chapter 4 Problem example for site verification
Chapter 3 Single site verification
Chapter 2 Single site verification preparation
Chapter 1 Single site verification overview
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Confidential Information of Huawei.
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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.
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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.
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Confidential Information of Huawei.
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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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