3G Cluster Optimization FAQ’s
1. What is Cluster? Minimum No. sites required for the cluster?
a. Cluster is a group of sites which should have minimum of three sites.
2. Why do we need polygon for the cluster?
a. Polygon is calculated from -98 coverage plot. If we use the polygon we will be able to
generate KPI’s only inside the polygon. Analysis needs to be done inside the polygon
only.
3. What will you do, when you first get the cluster?
a. First get the sitelist and check whether all sites are there in UTRAN report and all sites
are transmitting or not.
4. What are the things we need to check in UTRAN report?
a. Check the alarms, VSWR,RSSI , T1 status, TX/RX settings, HSTX board settings.
5. What is the general process for the cluster?
a. Few slides attached at the end.
6. What do we have in Quick summary report?
a. A quick report that should have Scanner, UE, and individual SC plots.
b. Also give a KPI summary in the report with all the alarms, VSWR, RSSI ,etc.
7. Why do we need pilot pollution and tilt recommendations during cluster analysis?
a. To check the following:
b. Over Shooters. This can be seen from individual SC plots. You need to have a good
reason to downtilt or not and also you need to use a good tilt tool ( for eg; Katherien
tool) and check the terrain from Google Earth before recommending your tilt.
c. Too many servers. Check the cause for them which can be lack of dominancy in poor
RF condition at the coverage edge, or over shooters. In case of lack of dominancy in
poor coverage, check the current CPICH and tilt. The CPICH should be aligned. You
can uptilt if that will help to create dominancy in the area.What tool do we use for pilot
pollution analysis in Atlanta? What are the plots we need for the same?
8. What is the Kit configuration for TEMS and Agilent log files?
9. Why do we need Network image for SSV/Cluster?
a. To get the attributes that we don’t have in normal repository.
10. What do we have in Actix Batch file?
a. Cluster polygon and a Cellref
11. When will we propose a verification drive?
a. When we have a particular route in the drive where event has occurred and it is making
our cluster red. We will suggest a verification drive to remove that event.
b. NOTE: verification drive should be done within 48hrs of the actual tuning drive.
12. When do we do IRAT/IFHO drive? For which carrier we do IRAT drive?
a. IRAT/IFHO drive is performed after cluster is green/acceptable and just before the
launch of the cluster. IRAT drive is done for 1C and for other carriers, we have IFHO
drive.
13. What is Layer Management? Why do we need LM strategy?
a. The multi-carrier layer management principle is to efficiently balance radio resources
between layers (power is the key factor).
b. Idle mode traffic management between layers is the preferred method of load
balancing.
c. Inter-frequency Load Sharing (IFLS) should be used for load distribution at the call
setup. IFHO should be minimized to reduce the amount of time UEs spend in
compressed mode.
d. Since UE can only scan two other non used frequencies, there is a need for neighbor
strategy with the introduction of 3rd carrier and Femto cells.
e. Example LM strategy – F1F2F3F4F1 (waterfall)
14. How do we define Load sharing?
a. Load sharing is defined to the co-sector of the different carrier based on the LM
strategy.
15. How do we define Directed Retry?
a. DRetry is defined to the Co-Located GSM site.
16. How do we define Femtos?
a. Femtos are defined based on the underlying carrier. If its 1st carrier, then define it
based on the surrounding sites from the same RNC.
17. How do we do CPICH alignment?
a. Match the Cpich to same band carrier or make it 8or 10 % of maxtxpower for 850 or
1900 resp. (Always consult ML)
18. Where do we get maxdlcapability from?
a. UTRAN report
Here are some slides snapshot for some more information about Cluster process .
Slide title
minimum 32 pt
32 pt makes 2 rows
Pr e-l a u n c h Tu n in g Pr o c es s
xt and bullet level 1
minimum 24 pt
Bullets level 2-5
minimum 20 pt
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ĢģĪīĮįİıĶķĹĺĻļĽľŁłŃńŅņŇňŌŐőŒœ ŔŕŖŗŘřŚśŞşŠ
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ΏΐΑΒΓΕΖΗΘΙΚΛΜΝΞΟΠΡΣΤΥ
ΫΆΈΉΊΰαβγδεζηθικλνξορςΣ
ΧΨΩΪΫΌΎΏ
ЇЈЉЊЋЌЎЏАБВГДЕЖЗИЙКЛМНО
ТУФХЦЧШЩЪЫЬЭЮЯАБВГДЕ
ЙКЛМНОПРСТУФХЦЧШЩЪЫЬ
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xt in the footer area
PreLaunch Tuning | Ericsson Internal | © Ericsson AB 2010 | 2011-03-25 | Page 4
Slide title
minimum 32 pt
32 pt makes 2 rows
Tu n in g Dr iv e 1
xt and bullet level 1
minimum 24 pt
OBJECTIVES:
Bullets level 2-5
minimum 20 pt
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ŅŇŇŌŌŐŐŔŔŖŖŘŘŚŚŞŞŢŢŤŤŪŪŮŮŰŰŲŲŴŴŶ
ș
ΏΐΑΒΓΕΖΗΘΙΚΛΜΝΞΟΠΡΣΤΥ
ΫΆΈΉΊΰαβγδεζηθικλνξορςΣ
ΧΨΩΪΫΌΎΏ
ЇЈЉЊЋЌЎЏАБВГДЕЖЗИЙКЛМНО
ТУФХЦЧШЩЪЫЬЭЮЯАБВГДЕ
ЙКЛМНОПРСТУФХЦЧШЩЪЫЬ
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› Focus on coverage, pollution, boomers. Reveal coverage holes if any.
Identify over-propagating Cells. Reveal pilot pollution areas / areas
lacking dominant server.
› Frequency band comparison ( Compare coverage polygon for all
carriers)
› Identify and Report Site Installation and Integration Problems.
› Detect Missing Neighbors
› Identify Scrambling Code Plan Collisions
› Provide Change Recommendations
PreLaunch Tuning | Ericsson Internal | © Ericsson AB 2010 | 2011-03-25 | Page 5
Slide title
minimum 32 pt
32 pt makes 2 rows
Tu n in g Dr iv e 1
xt and bullet level 1
minimum 24 pt
EXPECTATIONS:
Bullets level 2-5
minimum 20 pt
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› The Report should have recommendations and any issue’s you see.
› A quick report that should have Scanner, UE, and individual SC plots.
› Quick analysis of all the events just to capture any major site/network
configuration issue, but you don’t need to put them on the report if you
are short on time.
ĄĆĆĊĊČČĎĎĐĐĒĒĖĖĘĘĚĚĞĞĠĠĢĢĪĪĮĮİĶĶĹĹĻ
ŅŇŇŌŌŐŐŔŔŖŖŘŘŚŚŞŞŢŢŤŤŪŪŮŮŰŰŲŲŴŴŶ
ș
ΏΐΑΒΓΕΖΗΘΙΚΛΜΝΞΟΠΡΣΤΥ
ΫΆΈΉΊΰαβγδεζηθικλνξορςΣ
ΧΨΩΪΫΌΎΏ
ЇЈЉЊЋЌЎЏАБВГДЕЖЗИЙКЛМНО
ТУФХЦЧШЩЪЫЬЭЮЯАБВГДЕ
ЙКЛМНОПРСТУФХЦЧШЩЪЫЬ
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o not add objects or
xt in the footer area
PreLaunch Tuning | Ericsson Internal | © Ericsson AB 2010 | 2011-03-25 | Page 6
Slide title
minimum 32 pt
32 pt makes 2 rows
xt and bullet level 1
minimum 24 pt
Bullets level 2-5
minimum 20 pt
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Z[\]^ _`a b c d ef g h ij k l m n o p q r s t u v w x y
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ÑÒÓÔÕÖ×ØÙÚÛÜÝÞß à á â ã ä å æ ç èéêëìí
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ĢģĪīĮįİıĶķĹĺĻļĽľŁłŃńŅņŇňŌŐőŒœ ŔŕŖŗŘřŚśŞşŠ
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ŅŇŇŌŌŐŐŔŔŖŖŘŘŚŚŞŞŢŢŤŤŪŪŮŮŰŰŲŲŴŴŶ
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ΏΐΑΒΓΕΖΗΘΙΚΛΜΝΞΟΠΡΣΤΥ
ΫΆΈΉΊΰαβγδεζηθικλνξορςΣ
ΧΨΩΪΫΌΎΏ
ЇЈЉЊЋЌЎЏАБВГДЕЖЗИЙКЛМНО
ТУФХЦЧШЩЪЫЬЭЮЯАБВГДЕ
ЙКЛМНОПРСТУФХЦЧШЩЪЫЬ
ЁЂЃЄЅІЇЈЉЊЋЌЎЏѢѢѲѲѴѴҐҐәǽẀẁẂẃẄẅỲỳ№
Tu n in g Dr iv e 1
WHAT ARE WE CHECKING FOR:
› If all routes are driven, if for any missing routes immediately check the drive diary
and see if the drive team has any reason’s for missing them. Also escalate this to the
Market Lead. We need a full cluster drive to begin working on the report.
› Each sector is transmitting and taking calls.
› Swapped feeders. Make sure that cells are propagation in the right direction with the
designated SC.
› Azimuth Check. If you see something that doesn’t look normal, verify that the
azimuth in your cellref matches the RND-CIQ. If still in doubt, ask the team lead for
the RFDS for that site.
› Proper foot print and good coverage at least close to the site. The RSCP should be
Green closer to the site, if not take a look at the terrain, Alarm report and current tilt.
You may recommend Electrical Uptilt if the issue is not due to terrain or alarm issue.
› Missing Neighbors. Need to be added both ways and Change Request (CR) to be
created and embedded in the recommendation slide.
o not add objects or
xt in the footer area
Slide title
minimum 32 pt
32 pt makes 2 rows
xt and bullet level 1
minimum 24 pt
Bullets level 2-5
minimum 20 pt
)*+,56 78 9 :;<=>?@ABCDEFGHIJKLM NOPQRST
Z[\]^ _`a b c d ef g h ij k l m n o p q r s t u v w x y
¤¥ ¦§¨©ª«¬®¯°±² ³´¶·¸¹º»¼ ½ ÀÁÂÃÄÅÆÇ
ÑÒÓÔÕÖ×ØÙÚÛÜÝÞß à á â ã ä å æ ç èéêëìí
ô õ ö ÷ø ù ú û ü ý þÿ ĀāĂă ąĆćĊċČĎďĐđ ĒĖėĘę
ĢģĪīĮįİıĶķĹĺĻļĽľŁłŃńŅņŇňŌŐőŒœ ŔŕŖŗŘřŚśŞşŠ
ŮůŰűŲųŴŵŶŷŸŹźŻżŽžƒȘșˆˇ˘˙˚˛˜˝ẀẁẃẄẅỲỳ–—
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ĄĆĆĊĊČČĎĎĐĐĒĒĖĖĘĘĚĚĞĞĠĠĢĢĪĪĮĮİĶĶĹĹĻ
ŅŇŇŌŌŐŐŔŔŖŖŘŘŚŚŞŞŢŢŤŤŪŪŮŮŰŰŲŲŴŴŶ
ș
ΏΐΑΒΓΕΖΗΘΙΚΛΜΝΞΟΠΡΣΤΥ
ΫΆΈΉΊΰαβγδεζηθικλνξορςΣ
ΧΨΩΪΫΌΎΏ
ЇЈЉЊЋЌЎЏАБВГДЕЖЗИЙКЛМНО
ТУФХЦЧШЩЪЫЬЭЮЯАБВГДЕ
ЙКЛМНОПРСТУФХЦЧШЩЪЫЬ
ЁЂЃЄЅІЇЈЉЊЋЌЎЏѢѢѲѲѴѴҐҐәǽẀẁẂẃẄẅỲỳ№
o not add objects or
xt in the footer area
PreLaunch Tuning | Ericsson Internal | © Ericsson AB 2010 | 2011-03-25 | Page 7
Tu n in g Dr iv e 1
WHAT ARE WE CHECKING FOR:
› Over Shooters. This can be seen from individual SC plots. You need to
have a good reason to downtilt or not and also you need to use a good
tilt tool ( for eg; Katherien tool) and check the terrain from Google Earth
before recommending your tilt.
› Too many servers. Check the cause for them which can be lack of
dominancy in poor RF condition at the coverage edge, or over shooters.
In case of lack of dominancy in poor coverage, check the current CPICH
and tilt. The CPICH should be aligned. You can uptilt if that will help to
create dominancy in the area.
› Coverage holes. If any check if CPICH is aligned, if so, check if Up tilt
can improve the coverage.
› Does the drive border other state? Do you have neighbors defined
between both states? Is the Iur link defined? Is IFHO working between
both states?
PreLaunch Tuning | Ericsson Internal | © Ericsson AB 2010 | 2011-03-25 | Page 8