Huawei wcdma-rno-single-site-verificationV1

WCDMA RNO Single Site
Verification
ISSUE
1.0
Wireless Curriculum Development Section

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Confidential Information of Huawei.
No Spreading without Permission.
Course Contents
Chapter 1 Single site verification overview
Chapter 2 Single site verification preparation
Chapter 3 Single site verification
Chapter 4 Problem example for site verification
Security Level: Internal

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Single Site Verification Overview

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 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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 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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 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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Course Contents

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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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 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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 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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 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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Course Contents

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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, 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.

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 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.

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 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

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 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

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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.

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 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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 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

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 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

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 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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 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

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 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

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 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

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 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

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 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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 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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 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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 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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 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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Course Contents

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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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 Scrambling Code Setting is wrong
 The Scrambling Code may be wrong in RNC, check the
Answers
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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 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.
Answers

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