Pwr Ctrl Trial Rev9

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Author: Syed/ Rommel/Eryl Dynamic BTS/MS Power Control Trial Page 2 of 9Date: 08 June 2012

Feature Implementation Request

DYNAMIC BTS & MS POWER CONTROL

Recommendations and Trial Strategy

Author: Syed/Rommel/ErylDate: 08 June 2012

Ref: Max/PC/002Version: 0.1Status: Draft

Sec. Class:


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Contents

1 Document Control ............................................................................................................................ 41.1 Revision History ...................................................................................................................... 41.2 Reviewers ................................................................................................................................ 41.3 Change Request Summary ..................................................................................................... 51.4 Further Details ......................................................................................................................... 6

1.4.1 The algorithms in MS Power Control and BTS Power Control are the same. .................... 61.4.2 Proposed Parameter Settings ............................................................................................. 71.4.3 Planned Implementation ..................................................................................................... 8

1.5 Trial Results ............................................................................................................................ 81.6 Conclusions ........................................................................................................................... 10


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1 Document Control

1.1 Revision History

RevisionNumber Date Name Revision

R1 2/9/11 Rommel

R2 5/9/11 Rommel

R3 13/9/2011 Eryl UPDWNRATIO ratio tuned for trial BSCs

R4 21/9/2011 Rommel Adjusted MS PC settings rolled in

R5 23/9/2011 Syed Results after the BTS PC settings

R6 27/9/2011 Syed Further results after the BTS PC settings

R7 4/10/11 Rommel Results after MS+BTS PC Settings

R8 6/10/11 Syed Results after MS+BTS PC Settings

R9 3/11/11 Eryl AMR settings

1.2 Reviewers

Reviewer Date Feedback


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1.3 Change Request Summary

Feature Name

Dynamic BTS and MS Power Control

Brief Feature Description

When BTS and MS Power Control are used in the network, the total amount of radiated power isreduced. This implies that the uplink co- and adjacent channel interference in the network is reduced.The C/I will be increased for connections with low signal strength or with bad quality using full BTS orMS output power, since they experience a reduced interference level. On the other hand, the C/I isdecreased for connections with high signal strength and good quality since they are subject to a reducedMS output power. The C/I reduction will however not affect the speech quality since these connectionshave a margin to the lowest tolerable C/I.

Key Benefits

Improved DCR and SDDR.

Risks

Reduced Rxlev on Active Mode during drivetest activity.

Considerations

Aggressive Power Control Settings are needed in a dense urban area to minimize the level ofinterference.

Trial Details

Below are the list of BSCs that shall be included in this trial / fine tuning activity:1. Oct3 KPNG07, KPNG08 - SSDESDLAFR2. Oct3 RWNG05, RWNG08 - SSDESULAFR3. Oct3 KPNG09, SHTI25 SSDESULAHR (OL)4. Oct4 BESI14, NILA07, NILA08, RWNG04, SHTI24 SSDESULAHR (OL)5. Oct8 KPNG09, SHTI25 SSDESULAHR (UL)

Trial Date 2011 Oct 3Proposed Roll Out ScheduleTBC Will confirm after trial results

Proposed Roll Out Date TBD


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1.4 Further Details

1.4.1 The algorithms in MS Power Control and BTS Power Control are thesame.

When a connection has low path loss (left part), the BTS transmits at its lowestpossible power level. Although the MS receives a signal that exceeds the desiredvalue, the BTS cannot reduce the transmitted power any further. Conversely,when a connection experiences high path loss (right part), the BTS transmits atthe maximum allowed power level for the cell. The power cannot be increasedeven if the received signal strength in the MS is low. Note that this is dependent onthe path loss compensation used.

When quality is taken into account the output power is regulated up or downdepending on the received quality. The base station power then varies with thequality measured by the MS. When an MS has low rxqual (high quality) the basestation sends on low power and when an MS has high rxqual, on high power. Thehigher the rxqual, the higher the power and vice versa.


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1.4.2 Proposed Parameter Settings

Parameter Current Value Trial 1 Values Trial 2 Values

UPDWNRATIO 134 200 200

QDESUL 10 25 20QDESULAFR 10 30 20

QDESULAHR 10 25 20

QCOMPUL 80 90 75

QCOMPUL 10 10 6

SSDESULAFR 92 92 94

QDESDL 20 30 30

SSDESDLAFR 90 92 92

QDESDLAFR 20 35 35

QDESDLAHR 20 30 30

MS POWER CONTROL BTS POWER CONTROL


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Planned Implementation

The following sequence of parameter modification is proposed:

BSC Parameter Layers

KPNG07 SSDESDLAFR 92 to 93 AllKPNG08

RWNG05SSDESULAFR 94 to 95 All

RWNG08

KPNG09SSDESULAHR 94 to 92 GSM900

SHTI25

BESI14

SSDESULAHR 92 to 90 GSM1800

NILA07

NILA08

RWNG04

SHTI24

1.5 Trial Results

1.5.1 KPNG07: Improved


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KPNG08: Maintained

RWNG05: Maintained


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RWNG08: Improved

Cluster of 5 BSCs: Improved

1.6 Conclusions

Documents

Pwr Ctrl Trial Rev9