[Seminar5] Adj BTS Power

Gerard Hao-Law-Chong

March 2010

B11 MR1 Ed1.x / Ed2.x

Seminar of GSM Network Engineering

Adjust BTS power level from OMCR

2 | B11 MR1 Ed1.0 | FSM Adjust BTS power level from OMCR | January 2010

Alcatel-Lucent – InternalProprietary – Use pursuant to Company instruction.

Publication Information

Author: Gerard Hao-Law-Chong, Operational Network Engineering

Publication history:

29/01/2010: V01.01, Draft.

01/02/2010: V02



Reference documentation

B10_BTS_output_power_per_step_of_01dB_p1.pptThe B10 presentation of this feature

TD/MRC/OMD/2008.691 v5 (formerly managed as TD/MRC/OMD/2008.278)

“OMC DN – Impact due to the RFD 238693 - Adjust BTS power level from OMC”This memo describe the B10 & B11 scope of this feature

3BKA20CBR255348 255348_Adjust_PW_level_3.doc (OSY) “B11 LCM: Adjust BTS power level from OMC RFD 238693”

This memo describe the B10 & B11 scope of this feature

MoAD/GSM Radio/R&D/OSY/EME/208072 Ed09 “Adjust BTS power level from OMC RFD 238 693”

Agenda

1. Feature Overview

2. Migration Rules

3. Activation Strategy

4. Feature Assessment

5. Conclusion

6. Annex


Alcatel-Lucent – InternalProprietary – Use pursuant to Company instruction. 5 | B10 mCCCH | September 2008

1Feature Overview



Feature OverviewThe request from T-Mobile

Request from T-Mobile:

in relation with the swap of Motorola BSS (to ALU BSS B9) . T-Mobile observes an higher ALU BTS output power than with Motorola, and does not want to emit higher than with Motorola.

But as the granularity of BS_TXPWR_MAX is 2dB, ALU TRE emitted power could then become significantly lower than Motorola.

The Request of T-Mobile is to finely tune the power level at cell level.

Feature Definition :

3BKA55CBR252615 Adjust of BTS power level from OMCR (B11 version)

cell power attenuation by step of 0,1 dB ( for all TRE of the cell ).



Feature OverviewBenefits

Benefits expected from this feature

QoS :

by better use of the Radiated power limit per Band given by regulation authority, an increase of coverage could be expected.

Other :

respect of the Radiated power limit per Band given by regulation authority.



Feature OverviewPrinciple

principle : The cell power attenuation is done

On any type of cell, at a resolution of 0.1dB

For a concentric cell, attenuation is done independently on inner and outer zone

This will be done by following parameters on OMC HMI BS_TXPWR_ATTENUATION_INNER define power reduction, in 0.1dB

Applied on the TRX(s) of the Inner zone of a concentric cell.

BS_TXPWR_ATTENUATION define power reduction, in 0.1dB Applied on the TRX(s) of the outer zone of a a concentric cell Applied on the TRX(s) of a normal cell

Note: Although defined in 0.1dB, the applied attenuation can vary up to 0.15dB.



Feature Overview GMSK & 8PSK power

As a general rule (ALU BSS) , cell power attenuation applies only on the GMSK signal.

as generally the power available for 8PSK is lower than the one available with GMSK. The back-off power of 8PSK is reduced (see Annex : HSDS Synthesis impact ).

8PSK power levelling ( down to GMSK Power )

BTS internaly level 8PSK power down to GMSK Power as in under example

Example :

TRE power before power attenuation : GMSK power = 45.44 dBm , 8PSK power = 44.76 dBm

power attenuation = 1.2 dB

GMSK power after power attenuation = 45.44 dBm - 1.2 dB = 44.24 dBm ( < 8PSK, 44.76 dBm )

TRE power after power attenuation : GMSK power = 44.24 dBm = 8PSK power = 44.24 dBm

BTS has reduce 8PSK power down to GMSK Power



Feature OverviewCell type : normal cell

for Cell type : normal cell , no ‘unbalanced TRX output power’

The attenuation apply on top of the levelling, thus decreasing the RA output power.

OMU performs the levelling on all the TRE, i.e. lines down possibly the emitted power in order that the power, as measured on TOC (Top Of Cabinet) is the same whatever the TRE.



Feature Overview Cell type : normal cell

example: BTS power levelling

Cell1 Cell2 1. Max_GMSK_GSM after BTS levelling 1. Max_GMSK_GSM after BTS levelling 2. BS_TXPWR_ATTENUATION 2. BS_TXPWR_ATTENUATION 3. GMSK output power after Attenuation 3. GMSK output power after Attenuation 4. Effective modulation delta power 4. Effective modulation delta power = 0

GMSK power = 8PSK power

G

MS

K

8PS

K

TRX 1 TRX 2

GM

SK

8PS

K

Cell 1

1

2

4

GM

SK

8PS

K

TRX 1 TRX 2

GM

SK

8PS

K

Cell 2

1

2

3 3

4



Feature Overview Cell type : shared cell

for Cell type : shared cell , no ‘unbalanced TRX output power’

attenuation apply on top of the levelling as follows.

Note : A shared cell is a cell handled by 2 BTS

On the main cell

OMU applies attenuation as : GMSK Output power after attenuation = ‘Max_GMSK_GSM – BS_TXPWR_ATTENUATION ’ Max_GMSK_GSM is the output power after BTS levelling

On the secondary cell

GMSK Output power after attenuation of main sector,

is the target power to be reach by each TRX The SUM board compute attenuation for each TRX, to reach targeted power

In case that one TRX cannot reach the targeted power – the SUM board raise BTS-alarm : Class 3 "SW-AN Alarms", Type 14 "Wrong-

Configuration", Alarm Number 10, severity "Minor (DMA)“– Traffic possible, that only one TRE cannot reach targeted power



Feature Overview Cell type : shared cell

for Cell type : shared cell , no ‘unbalanced TRX output power’

Main Sector Secondary Sector 1. Max_GMSK_GSM (Main), BTS levelling 1s. Max_GMSK_GSM (secondary),BTS levelling 2. BS_TXPWR_ATTENUATION3. GMSK output power after Attenuation 3s. Requested GMSK output power from Main

target for output power of every TRX4. Effective modulation delta power 4s. Effective modulation delta power

GM

SK

8PS

K

TRX 1 TRX 2

GM

SK

8PS

K

Main sector

TRX 4

GM

SK

8PS

K

secondary sector

GM

SK

8PS

K

TRX 3

1 3

2

4

1s 3s

4s

See :Annex : HSDS Synthesis impact



Feature Overview Cell type : concentric cell

for Cell type : Mono-band concentric cell, no ‘unbalanced TRX output power’

BTS will apply selectively

BS_TXPWR_ATTENUATION_INNER to inner TRE

BS_TXPWR_ATTENUATION to outer TRE

for Cell type : Multi-band concentric cell, no ‘unbalanced TRX output power’

After having applied levelling per band

BTS will apply selectively

BS_TXPWR_ATTENUATION_INNER to inner TRE

BS_TXPWR_ATTENUATION to outer TRE



Feature Overview Cell type : concentric cell

for Cell type : Mono-band concentric cell, with ‘unbalanced TRX output power’

See : Annex : Unbalanced output power

On the basis of TRE HW capability Update service, BSC computes (levelling) :

output power for the inner part, output power for the outer part

if delta between above powers

is greater than ‘Advisable_inner_outer_power_gap’BTS will apply selectively – BS_TXPWR_ATTENUATION_INNER to inner TRE – BS_TXPWR_ATTENUATION to outer TRE

is equal or less than ‘Advisable_inner_outer_power_gap’BTS will apply– BS_TXPWR_ATTENUATION_INNER to inner and outer TRE

Advisable_inner_outer_power_gap is a BSC constant = 1.5dB



Feature Overview Telecom impact

The following functions inside the BSS are impacted :

Electromagnetic Environment (EME)

BTS is impacted in the computation of the EME indicators EME_TRX_PWR_GSM, EME_TRX_PWR_DCS average output TRX



2Migration Rules



Migration RulesOMC migration

During OMC migration, the related feature parameters are migrated as well.

If the migration is done from a B10 OMC not implementing this feature ( any B10 release excluding B10 MR2 Ed6 ),

In the intermediate phase where OMC is in B11 and some BSC are in B10

the user will be allowed to use PWR_ADJUSTMENT (B10) and T3106_D/T3106_F trick for the B10 cells.

but this will be without any effect at equipment level (except the modification of T3106_D/T3106_F values) because the B10 BSC does not contain the feature.



Migration RulesFrom B10 , excluding B10 MR2 Ed6

Migration : previous version not supporting fine attenuation ( of B10 )

From any B10 release , excluding B10 MR2 Ed6

The BSC migration is performed through OEF application which builds the B11 DLS

BS_TXPWR_ATTENUATION = 20* BS_TXPWR_MAX previous release

BS_TXPWR_ATTENUATION_INNER = 20* BS_TXPWR_MAX_INNER previous release

BS_TXPWR_MAX new = 0

BS_TXPWR_MAX_INNER new = 0

BS_TXPWR_MIN new = BS_TXPWR_MIN previous release - BS_TXPWR_MAX previous release

Note :

20* BS_TXPWR_MAX to convert from 2 dB step, to 0.1dB step

BS_TXPWR_MIN has a semantic change, it become relative to max power



Migration RulesFrom B10 MR2 Ed6

Migration : previous version (B10) supporting fine attenuation

B10 MR2 Ed6 ( including 3BKA55CBR238693 )

The BSC migration is performed through OEF application which builds the B11 DLS

BS_TXPWR_ATTENUATION = 20* BS_TXPWR_MAX previous release

+ PWR_ADJUSTMENT

BS_TXPWR_ATTENUATION_INNER = 20* BS_TXPWR_MAX_INNER previous release

+ PWR_ADJUSTMENT

BS_TXPWR_MAX new = 0

BS_TXPWR_MAX_INNER new = 0

BS_TXPWR_MIN new = BS_TXPWR_MIN previous release - BS_TXPWR_MAX previous release

PWR_ADJUSTMENT is a specific parameter introduced in B10 MR2 Ed6



3Activation strategy



Activation Strategy

The feature is NOT optional

this feature is delivered in B11 MR1



Activation Strategy

Compatibility with previous HW generation and restrictions

The feature is compatible with

TRE generation G3, G4, G5 (Twin).

Restrictions & Limitations

none



Activation Strategy

Telecom Parameters New

New Parameters

Parameter Name DefinitionSub-System

Instance

Category/ OMC-R access

TypeRange/ Default value

BS_TXPWR_ATTENUATION

defines the power reduction, in 0.1dB, applied to output power (after leveling) of TRX(s).

In a concentric or multi-band cell, this attenuation applies on the outer zone

BSC CellSite CAE)/ Changeable

Number [0, 31.9] / 0 dB

BS_TXPWR_ATTENUATION_INNER

defines the power reduction, in 0.1dB, applied to output power (after leveling) of TRX(s),

of inner zone in a concentric or multi-band cell.

BSC CellSite (CAE)/ Changeable

Number[0, 31.9] / 0 dB



Activation Strategy

Telecom Parameters New

New Parameters

Category : System (CST) means a constant

OMC-R access : None (DLS) means not displayed at OMC


Instance



Advisable_inner_outer_power_gap

When BSC tries to apply unbalanced TRX output power algorithm, BSC considers it has successfully identified two levels

of power if the delta between resulting outer power and inner power is greater than Advisable_inner_outer_power_gap.

This parameter is used only if En-Unbalanced-Output-Power is set to true.

BSC BSCSystem (CST)/ None (DLS)

Number[0, none] / 1.5 dB



Activation Strategy

Telecom Parameters Modified

Modified Parameters

Note : BS_TXPWR_MIN is a parameter of Downlink Power Control algorithm, and it defines

the lowest Downlink Power of the BTS ( linked to a given CS cal )

Semantic change :

in B10 BS_TXPWR_MIN is the ‘max power attenuation’

BS_TXPWR_MAX being the min power attenuation

in B11 BS_TXPWR_MIN is relative to ‘max power’

So relative to ‘BS_TXPWR_ATTENUATION‘


Instance



BS_TXPWR_MIN

maximum value of the power attenuation (so the minimum allowed transmission power) relative to the attenuated maximum GMSK output power of the BTS

BSS cell Changeable Number[- 30, 0] / - 24 dB



Activation Strategy


Modified Parameters

B10 B11

1. BS_TXPWR_MAX ‘min power attenuation’ 1. BS_TXPWR_ATTENUATION2. BS_TXPWR_MIN ‘max power attenuation’ 2. BS_TXPWR_MIN

is relative to ‘max power’

GM

SK

1

2

B10

GM

SK

1

2

B11

DL Power Control area



Activation Strategy


Modified Parameters


Instance



BS_TXPWR_MAX

defines the power reduction relative to the attenuated maximum GMSK output power of the BTS.

It is fixed to 0.

not directly managed by the operator anymore (greyed on the HMI)

BSS cellVirtual (DLS)

Number[- 30, 0] / 0 dB

BS_TXPWR_MAX_INNER

defines the power reduction relative to the attenuated maximum GMSK output power of the TRX of the inner zone in a concentric or multi-band cell.

It is fixed to 0.

not directly managed by the operator anymore (greyed on the HMI)

BSS cellVirtual (DLS)

Number[- 30, 0] / 0 dB



4 Feature Assessment



Feature Assessment Telecom Counters Modified

New Counters : none

Modified CountersCounter refname

Long Name Definition Measured object

Domain

Type

RMSPw3MAX_POWER_PER_TRX

Maximum GMSK TRX power level applied at the BTS antenna output connector in tenths of dBm.

The power takes into account

• the different losses (cables, internal combiners), the internal/ external leveling

• the attenuation set by the operator (BS_TXPWR_ATTENUATION / BS_TXPWR_ATTENUATION_INER)

• the “unbalancing TRX output power per BTS sector" if activated

TRX

Quality of Service

31



Feature Assessment Test Strategy : FOA Functional test

Functional test_1 :

Platform : FOA on-air platform at Vélizy

Objective : verify that 0.1 dBm step is observed at Top Of Cabinet in GMSK

Functional test_2 :

Platform : FOA on-air platform at Vélizy

Objective : verify that 0.1 dBm step is observed at Top Of Cabinet in 8PSK

comments : this test will use the 8PSK down leveling to GMSK level by the BTS

Priority : this test is optional

This feature can/should be validated on FOA on-air platform at Vélizy

31 | B11 TRX Dynamic Power Saving | March 2009



Feature Assessment Test Strategy : First Off, non regression after migration


Pre-requisites :

Reference & observation periods : 1 week with similar traffic profile, BSS & Cells parameters should be compared between before & after

migration

Resources and teams 1 RNE

Check correct migration of parameters : BS_TXPWR_ATTENUATION

BS_TXPWR_ATTENUATION_INNER BS_TXPWR_MAX BS_TXPWR_MAX_INNER BS_TXPWR_MIN

Note : above parameter should not be modified in the observation period ( just migrated )

Statistical : QOS follow-up : alc_mono_call, alc_mono_HO_distribution RMS (DL_RXLEV, DL_RXQuality) , EME indicators

Drive test : none



Feature Assessment Test Strategy : First Off, non regression after parameter change


Pre-requisites :

Reference & observation periods : 1 week with similar traffic profile, Resources and teams,

1 RNE

Objective : observe non regression, that small change of parameter give

small changes or stable coverage, or CS/PS KPI.

change parameters : BS_TXPWR_ATTENUATION change in the range +0.1 to +0.5 dB BS_TXPWR_ATTENUATION_INNER change in the range +0.1 to +0.5 dB

Statistical : QOS follow-up, main CS KPI, CDR, CSSR, HO distribution RMS (DL_RXLEV, DL_RXQuality), EME indicators



Feature Assessment

Test Result on FOA Vélizy platform



Feature Assessment FOA Functional test : summary

Platform : FOA platform at Vélizy

Objective : verify that 0.1 dBm step is observed at Top Of Cabinet in GMSK

This test has been done on different cell & modules TGT09, TRADE, TRGM, TGT18BP, on the BCCH frequency, in GMSK.

Observation : For all the tested modules, the TRE output power is in specified tolerance of 0.15dB

Test result : OK

Note : the followings graphs only contains measurement points ( no interpolation ), measurement details are in attached file.

B11MR1_Adjust BTS power level from OMCR_



Feature Assessment FOA Functional test : TGT09

TGT09 on BTS_002, Cell00020_00002

The TRE output power is in specified tolerance of 0.15dB

TGT09 Cell20_02 TRE_output_power( BS_TXPWR_ATTENUATION)

363738394041424344454647

0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100


TR

E o

utp

ut

( D

bm

)



Feature Assessment FOA Functional test : TRADE

TRADE on BTS_001, Cell00030_00002


TRADE Cell30_02 TRE_output_power( BS_TXPWR_ATTENUATION)

43.443.543.643.743.843.9

4444.144.244.344.444.544.6

0 1 2 3 4 5 6 7 8 9 10


TR

E o

utp

ut

( D

bm

)



Feature Assessment FOA Functional test : TRGM

TRGM on BTS_002, Cell00020_00001


TRGM Cell20_01 TRE_output_power( BS_TXPWR_ATTENUATION)

42

42.5

43

43.5

44

44.5

45

45.5

0 5 10 15 20 25 30


TR

E o

utp

ut

( D

bm

)



Feature Assessment FOA Functional test : TGT18BP

TGT18BP on BTS_006, Cell00020_00004 ( with a high losses cable )


TGT18BP BS0812U0MHW TRE_output_power( BS_TXPWR_ATTENUATION)

42

42.5

43

43.5

44

44.5

45

45.5

46

0 5 10 15 20 25 30 35


TR

E o

utp

ut

( D

bm

)

Dbm (TX1 output ) Dbm (TX2 output )



Feature Assessment

FO T-Mobile



Feature AssessmentFO T-Mobile : non regression after migration

Test Summary OMC Dortmund3 was migrated, and check of migration of new parameter has been done

Test Result : OK The new parameter BS_TXPWR_ATTENUATION has been correctly migrated from B10 The observation of QOS, RMS (DL_RXLEV, DL_RXQuality) , did not show any regression.

Note : BS_TXPWR_ATTENUATION_INNER was still at 0, as there was no concentric cell in the test area.



Feature AssessmentFO T-Mobile : non regression after parameter change

Test Summary Test done on BTS Bottrop-2_97B1, Bottrop-Fuhlenbrock-33, from W946.1 to W948.1 Power attenuation applied is in the range 0.1 to 0.5 dB

Test Result : OK No alarms related to change of BS_TXPWR_ATTENUATION

CS & PS KPIs are Stable : inline with expectation due to very weak power attenuation Call_drop_radio_rate(GQSCDRR) GPRS_DL_TBF_success_rate, GPRS_DL_TBF_drop_radio_rate, GPRS_UL_TBF_success_rate

RMS are stable : inline with expectation due to very weak power attenuation RMS_DL_RxQuality_avg (GRMQLDQUAN) RMS_DL_RxLevel_avg (GRMQLDLVAN)

EME (Electromagnetic Emission) : variation inline with power attenuation change EME_Power_GSM(GRMEEPWGDN)(dBm)

Issue found : on some EME & RMS indicator ( see next slide )



Feature AssessmentFO T-Mobile : Issue found

3BKA45FBR289142EME ( Electromagnetic Emission) indicators representing the Absolute BCCH power at BTS antenna has wrong valueEME_absolute_Power(GRMEEPWADN)(dBm), RMS_DL_Power_max_900 ( GRMSEBPWGN )EME_absolute_Power_Watt(GRMEEPWAN)(Watts)

Analysis A regression introduced on some EME indicator by new coding needed for this feature

Status : correction planned B11MR1ED2

3BKA45FBR291086Change done in BS_TXPWR_ATTENUATION is not reflected in EME & RM

Analysis

after we change BS_TXPWR_ATTENUATION from 0 to 0.1dbm, ( even from 0 to 0.5 dbm ) we did not see any change on indicator representing the Absolute BCCH power at BTS antenna. EME_absolute_Power (GRMEEPWADN), RMS_DL_Power_max_900(GRMSEBPWGN),.

Note : this pb does not concern EME radiated power indicator, EME_Power_GSM(GRMEEPWGDN)(dBm)

Status : under Analysis, (could be linked to 3BKA45FBR289142)



Feature AssessmentFO T-Mobile : EME_Power_GSM

EME (Electromagnetic Emission) EME_Power_GSM(GRMEEPWGDN)(dBm)The 09/11/09 power attenuation step1 was applied => EME decreasesThe 16/11/09 power attenuation step2 was applied (step2 = step1 +0.1db) => EME decreasesThe 23/11/09 power attenuation was set back to initial value ( 0) => EME back to previous valueWe observe that low EME_Power_GSM match with higher attenuation, this is an expected behavior

EME_Power_GSM(GRMEEPWGDN)(dBm) - 11/02/2009 to 11/29/2009

40,08

40,58

41,08

41,58

42,08

42,58

11/0

2/20

09

11/0

3/20

09

11/0

4/20

09

11/0

5/20

09

11/0

6/20

09

11/0

7/20

09

11/0

8/20

09

11/0

9/20

09

11/1

0/20

09

11/1

1/20

09

11/1

2/20

09

11/1

3/20

09

11/1

4/20

09

11/1

5/20

09

11/1

6/20

09

11/1

7/20

09

11/1

8/20

09

11/1

9/20

09

11/2

0/20

09

11/2

1/20

09

11/2

2/20

09

11/2

3/20

09

11/2

4/20

09

11/2

5/20

09

11/2

6/20

09

11/2

7/20

09

11/2

8/20

09

11/2

9/20

09

dBm

Bottrop-2_97B1_1a (9221/29562) Bottrop-2_97B1_2 (9221/4296) Bottrop-2_97B1_3 (9221/4297)

Bottrop-Fuhlenbrock-33_1 (9221/46950) Bottrop-Fuhlenbrock-33_2 (9221/46955) Bottrop-Fuhlenbrock-33_3 (9221/32108)

Attenuation

step1Attenuation

step2

Attenuation = 0Attenuation

back to 0



5Conclusion



Conclusion

The feature has been tested as follow

Functionnal test on FOA Velizy platform, OK Check of Power attenuation step of 0.1 Dbm with a power meter on TRE

No regression test on FO T-Mobile OK Migration of parameter BS_TXPWR_ATTENUATION is correct Migration of parameter BS_TXPWR_ATTENUATION_Inner could not be

checked ( as there was no Concentric cell in the test area ) Small change of Power attenuation does not affect KPIs, and EME, RMS

But we found the following issues : No blocking 3BKA45FBR291086 & 3BKA45FBR289142

Which concerns only indicators related to Absolute BCCH power at BTS antenna, ( other EME indicator like EME radiated power indicator, EME_Power_GSM(GRMEEPWGDN)(dBm) are not affected.

Conclusion : This feature is working correctly in B11 MR1Ed1.0



6Annex



Annex : Unbalanced output power

Unbalanced output power summary : for concentric Cell

Principle :

useful for concentric cells, with higher TRX output power for the outer zone.

balancing of the TRX power is done independently in inner and outer zones.

Remove the balancing of the TRX power between inner and outer zone.

Allow maximum TRX output power on outer zone.

Back to Feature Overview Cell type : concentric cell



Annex : HSDS Synthesis impact

HSDS Synthesis impact summary: all power are reported at 0.1dBm

Back to Feature Overview Cell type : shared cell



Annex : O&M Abis interface impact

O&M Abis interface

The fields representing the powers within the BTS HW config data will be coded in

0.1dBm with an offset 300 (eq. 0.1dBW) for the BTSs belonging to B11 27/05

and later BSCs. As the powers of our BTS are between 38 and 47/48 dBm, they

fit in one byte when coded with the new rule.

The impacted fields are those having the type TxPowerLevel: HwCapabilityInfo-FU.GmskPowerCapablity, HwCapabilityInfo-FU.8pskPowerCapability, HwCapabilityInfo-RA.MaxPowerPerSectorGSM, HwCapabilityInfo-RA.MaxPowerPerSectorDCS, HwCapabilityInfo-CU.txPowerLevel.



Annex : BSS_CONF impact

Impact on BSS_CONF all reported power are in 0.1 dBm

MAX_POWER_PER_SECTOR_GSM : GMSK output power for the GSM frequency band (GSM850 or PGSM or E-GSM ) at the BTS antenna output connector in 0.1dBm which the concerned RA (sector) can provide.

MAX_POWER_PER_SECTOR_DCS : GMSK output power for the DCS frequency band (DCS1800 or DCS1900) at the BTS antenna output connector in 0.1dBm which the concerned RA (sector) can provide.

BS_TX_PWR_MAX : 0 BS_TX_PWR_MAX_INNER : 0

BS_TXPWR_ATTENUATION : Power reduction expressed in 0.1dB applied on the sector, on the outer TRE

BS_TXPWR_ATTENUATION_INNER : Power reduction expressed in 0.1dB applied on the sector, on the inner TRE



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[Seminar5] Adj BTS Power