GSM Cell Planning and Optimization

By Sumantri Pramudiyanto (+6281703544310)Jakarta, April 7th , 2009

GSM Cell Planning and OptimizationStudy Case : Sragen AreaMateri berikut merupakan open content, bersifat free utk didistribusikan

Drivetest for QOD Program.ppt / 24.04.2008 / VS

ContentCell Planning ProcessIdle Mode OperationBSS ParameterRF Optimization flow chartStudy Cases of RF Optimization

Cell Planning ProcessCell planning can be described briefly as all the activities involved in determining which sites will be used for the radio equipment, which equipment will be used and how the equipment will be configured

Traffic and coverage AnalysisCollecting required dataMaking discussion with the client to know their demand.Analyzing traffic and coverage

Required data : Geography data Demography data Data of around network Available frequency Number of customer which wish to cover

Customer demand : GOS 2% 95 % Indoor coverage (C/I > 12 db) > 95%

Nominal Cell Plan - Dimensioning (1)Geography and Demography data taken from sragen.go.id Table 1 Geographic + Demographic data Table 2 Demographic data per years

Wide of area which will be covered Target subscriberAfter the data available, we need to divided the region into smaller cluster, then classify the subdistrict into cluster depend on traffic, contour area, and etc.From the demographic data (Table 2) , we able to calculate % growth of population. 573333 = 437556 x (1+r)6 r = 0.046Assume that, in 2010 the operator want to cover 10 % subscriber in the region, so the number of subscribers to be covered : Pt = 10 % x 57333 x (1+0.046)3 Pt = 65629If traffic allocation per subscriber equal to 60mE then total traffic in Sragen area = 65629 x 60 mE = 3937.74 E

Nominal Cell Plan - Dimensioning (2)From the geographic data we can determine Erlang distribution by density in each cluster.

The next step, we can calculate the number of required sites depend on traffic.Using erlang B table we can count number of sites for cluster sragen tengah (GOS 2%, 1585.85 Erlang) 1586 TS ~ 227 TRXSragen tengah locate in center of town and has high traffic we use configuration 5/5/5 so the number of sites required in this cluster : 227/15 TRX = 15 SitesWith the same way we can calculate number of sites for the others cluster:Sragen Timur = 9 sites(Config 4/4/4)Sragen Barat = 12 sites(Config 4/4/4)Sragen Utara = 9 sites(Config 4/4/4)

Nominal Cell Plan Link BudgetLink Budget Calculation is required to achieve system balance between uplink and downlink signal.Output from system balance is a cell size in every sites. We can calculate coverage area per sites in suburban and rural cluster by equation L = k x R2Lsite suburban = 1.95 x (1.865)2 = 6.78 km2L site rural= 1.95 x (2.67)2 = 13.90 km2The next step, calculating number of sites related to coverage.Choose the biggest one

78 Diagram_900

TYPICAL 1-5/8" DIAGRAM

No.P/NDESCRIPTIONu/mQTY1 runQTY3 sectorFeeder RemarksFeeder Length (m)Antenna TypeLoss/Gain

1Antenna00CS7209818.5

* 2N15Self-amalgamating tape 25mm*10m*0.5mm(thickness)pc0.53

* 2228Insulation tape 19mm*20m, blackpc212

* 2BN 15 05 97Seal. comp. tube 70 ccmpc16

3NKJ113Jumper 3m cable superflex 1/2", connectors 7/16-male and 7/16-malepc212

3BH-S12-NHStandard Hanger for Heliax feeder 1/2" (10pcs)box0.53

* 3RM-A300Round Member Adaptor, 3"-4" OD (76.2mm-101.6mm OD)kit of 10box0.53

4BN655668Conn 7/16 DIN-female for Heliax cable 7/8"pc212

5GK-C78Suregrounding kit for Heliax feeder 7/8"pc318

6CB-78HClick-on hanger clamp for Heliax feeder 7/8" (10pcs)box530

6HK-DSCB-M10M10 Hardware kit of Click-on hanger, 2 stacks for feeder " or 7/8" (10pcs)box2.515

6AA-SL-M10Compact Angle Adapter, 3/8" hardwarebox2.515

7RF 7/8"-50Feeder RF Heliax Cable 7/8"-50m503003.9db/100m857/83.315

* 8EP-1118ENTRY PANEL, 12 HOLES, 3X4(including blind boot)pc1

8BA-78-1AStandard 4" cable entry boot for Heliax Feeder 7/8", 1 runpc6

9BN756473Wideband EMP Protectorpc1

Connector and Jumper Loss

Connector PointsInsetion Loss

Point 1 (0.05)0.05

Point 2 (0.05)0.05

Point 3 (0.05)0.05

Point 4 (0.05)0.05

Point 5 (0.05)0.05

Jumper 1 (0.11/m)0.33

Jumper 2 (0.11/m)0.33

Antenna Type to be USED:

BandGainType

1CS72156.01DCS180018X-Pol

2CS72112.03GSM18X-Pol

3CS72098GSM18.5Single Pol

3CS72111GSM17X-Pol

Diversity Gain

Area typeDiversity gain with 45 polarizations,Compared with horizontal diversity

MS(0) / MS(45)

Indoor6 dB / 6 dB0 / 0 dB

Urban6 dB / 6 dB0 / 0 dB

Semi-urban4 dB / 5 dB0 / +1 dB

microcellular

Light suburban3 dB / 3 dB0 / 0 dB

BTS Configuration

FEEDER LOSS

3.9dB/100 mtrs

Feeder Length (7/8")Feeder LossConnector and Jumper LossTotal LossRemarks

100.390.911.30Recommended

200.780.911.69

301.170.912.08

401.560.912.47

501.950.912.86

602.340.913.25No Recommended

702.730.913.64

803.120.914.03Not Allowed

903.510.914.42

1003.900.914.81

&R&G

&L&F&A&C&D&R&P /&N

Point 1

Point 2

Point 3

Point 4

Point 5

Jumper 1

Jumper 2

78 Diagram _1800















7RF 7/8"-50Feeder RF Heliax Cable 7/8"-50m503005.79db/100m857/84.9215






Point 1 (0.05)0.05

Point 2 (0.05)0.05

Point 3 (0.05)0.05

Point 4 (0.05)0.05

Point 5 (0.05)0.05

Jumper 1 (0.17/m)0.51

Jumper 2 (0.17/m)0.51


BandGainType

1CS72156.01DCS180018X-Pol



3CS72111GSM17X-Pol

Diversity Gain


MS(0) / MS(45)




microcellular


BTS Configuration

FEEDER LOSS

5.79dB/100 mtrs

Feeder Length (7/8")Feeder LossConnector and Jumper LossTotal LossRemarks


201.161.272.43

301.741.273.01

402.321.273.59No Recommended

502.901.274.17

603.471.274.74Not Allowed unless using MHA

704.051.275.32

804.631.275.90

905.211.276.48

1005.791.277.06

Ultrasite Receiver Sensitivity900 MHz1800 Mhz1800 MHz1900 MHz

sub bandedfull band

w/o MHAwith MHAw/o MHAwith MHAwith MHAw/o MHAwith MHA

Static, single branch dBm-110.5-111-111-112-112.5-111-112

Dynamic, single branch dBm-108.5-109-110-109.5-110.5-109-110

Typical (field measurement) dBm-114

&R&G

&L&F&A&C&D&R&P /&N

Point 1

Point 2

Point 3

Point 4

Point 5

Jumper 1

Jumper 2

1 58 Diagram_900




* 2N15Self-amalgamating tape 25mm*10m*0.5mm(thickness)pc16






4BN655678Conn 7/16 DIN-female for Heliax cable 1-5/8"pc212

5GK-C158Suregrounding kit for Heliax feeder 1-5/8"pc318

6CB-158HClick-on hanger clamp for Heliax feeder 1-5/8" (10pcs)box954

6HK-DSCB158-M10M10 Hardware kit of Click-on hanger, 2 stacks for feeder 1-1/4" or 1-5/8" (10pcs)box4.527


7RF 1 5/8"-50Fedeer RF Heliax Cables 1-5/8" -50m905402.33db/100m851 5/81.98


8BA-158-1AStandard 4" cable entry boot for Heliax Feeder 1-5/8" , 1 runpc6




Point 1 (0.05)0.05

Point 2 (0.05)0.05

Point 3 (0.05)0.05

Point 4 (0.05)0.05

Point 5 (0.05)0.05

Jumper 1 (0.11/m)0.33

Jumper 2 (0.11/m)0.33


BandGainType

1CS72156.01DCS180018X-Pol



3CS72111GSM17X-Pol

Diversity Gain


MS(0) / MS(45)




microcellular


BTS Configuration

FEEDER LOSS

2.33dB/100 mtrs

Feeder Length (1 5/8")Feeder LossConnector and Jumper LossTotal LossRemarks


200.470.581.05

300.700.581.28

400.930.581.51

501.170.581.75

601.400.581.98

701.630.582.21

801.860.582.44

902.100.582.68

1002.330.582.91

1102.560.583.14Not Recommended

1202.800.583.38

1303.030.583.61

1403.260.583.84Not Allowed

1503.500.584.08

&R&G

&L&F&A&C&D&R&P /&N

Point 1

Point 2

Point 3

Point 4

Point 5

Jumper 1

Jumper 2

1 58 Diagram_1800















7RF 7/8"-50Feeder RF Heliax Cable 7/8"-50m503003.56db/100m851 5/8"3.026






Point 1 (0.05)0.05

Point 2 (0.05)0.05

Point 3 (0.05)0.05

Point 4 (0.05)0.05

Point 5 (0.05)0.05

Jumper 1 (0.17/m)0.51

Jumper 2 (0.17/m)0.51


BandGainType

1CS72156.01DCS180018X-Pol



3CS72111GSM17X-Pol

Diversity Gain


MS(0) / MS(45)




microcellular


BTS Configuration

FEEDER LOSS

3.56dB/100 mtrs

Feeder Length (1 5/8")Feeder LossConnector and Jumper LossTotal LossRemarks


200.711.271.98

301.071.272.34

401.421.272.69

501.781.273.05

602.141.273.41Not Recommended

702.491.273.76

802.851.274.12Not Allowed unless using MHA

903.201.274.47

1003.561.274.83

Ultrasite Receiver Sensitivity900 MHz1800 Mhz1800 MHz1900 MHz

sub bandedfull band

w/o MHAwith MHAw/o MHAwith MHAwith MHAw/o MHAwith MHA

Static, single branch dBm-110.5-111-111-112-112.5-111-112

Dynamic, single branch dBm-108.5-109-110-109.5-110.5-109-110

Typical (field measurement) dBm-114

&R&G

&L&F&A&C&D&R&P /&N

Point 1

Point 2

Point 3

Point 4

Point 5

Jumper 1

Jumper 2

PWBGT900_Combiner ByPass_158

RADIO LINK POWER BUDGETMS CLASS:4

GENERAL INFO

Frequency (MHz):900System:GSM

RECEIVING END:BSMS

RX RF-input sensitivity (TU50, RA250, HT100)dBm-106.00-102.00A

(Additional) Fast fading margindB0.000.00B(I..e For Dense Urban = 2 dB, Urban = 1 dB, Others = 0)

Cable loss + connectordB2.560.00C

Rx antenna gaindBi18.500.00D

Diversity gaindB3.000.00E

Body proximity lossdBm0.002.00

Isotropic powerdBm-124.94-100.00F=A+B+C-D-E

Field strengthdBV/m11.3536.28G=F+Z*

* Z = 77.2 + 20*log(freq[MHz])

TRANSMITTING END:MSBS

TX RF output peak powerW2.0028.18

(mean power over RF cycle)dBm33.0147.00K

Isolator + combiner + filterdB0.002.50L

RF-peak power, combiner outputdBm33.0140.01M=K-L

Cable loss + connectordB0.002.56N

TX-antenna gaindBi0.0018.50O

Body Proximity lossdBm2.000.00

Peak EIRPW1.26393.53

(EIRP = ERP + 2dB)dBm31.0155.95P=M-N+O

Isotropic path lossdB155.95155.95Q=P-F

CELL SIZES

COMMON INFODUUSUR

MS antenna height (m):1.51.51.51.5

BS antenna height (m):40.040.070.070.0

Standard Deviation (dB):8.55.55.55.5

In-car mean loss(dB)8.08.08.08.0

In-car Deviation (dB)8.58.58.58.5

BPL Average (dB):18.018.015.015.0

Standard Deviation indoors (dB):10.57.57.07.0

OKUMURA-HATA (OH)DUUSUR

Area Type Correction (dB)-2.0-4.0-7.0-10.0

WALFISH-IKEGAMI (WI)DUUSUR

Roads width (m):30.030.030.030.0

Road orientation angle (degrees):90.090.090.090.0

Building separation (m):40.040.040.040.0

Buildings average height (m):30.030.030.030.0

INDOOR COVERAGEDUUSUR

Propagation ModelOHOHOHOH

Slow Fading Margin + BPL (dB):30.526.122.422.4

Coverage Threshold (dBV/m):66.862.458.658.6

Coverage Threshold (dBm):-69.5-73.9-77.6-77.6

Location Probability over Cell Area(L%):95.0%95.0%95.0%95.0%

Cell Range (km):1.201.853.874.77

OUTDOOR COVERAGEDUUSUR


Slow Fading Margin (dB):9.55.35.35.3




Cell Range (km):4.907.4512.8315.84

INCAR COVERAGEDenseUrbanSub urbanRural



Coverage Threshold (dBuV/m):53.853.853.853.8



Cell Range (km):2.873.285.436.70

&LNokia Telecommunications&CCustomer Services&RPlanning Services

&L&F&R&D

PWBGT900_Combiner ByPass_78


GENERAL INFO

Frequency (MHz):900System:GSM

RECEIVING END:BSMS


(Additional) Fast fading margindB0.000.00B(I..e For Dense Urban = 2 dB, Urban = 1 dB, Others = 0)




Body proximity lossdBm0.002.00



* Z = 77.2 + 20*log(freq[MHz])








Body Proximity lossdBm2.000.00




CELL SIZES

COMMON INFODUUSUR




In-car mean loss(dB)8.08.08.08.0

In-car Deviation (dB)8.58.58.58.5

BPL Average (dB):18.018.015.015.0



Area Type Correction (dB)-2.0-4.0-7.0-10.0


Roads width (m):30.030.030.030.0










Cell Range (km):1.462.243.725.34







Cell Range (km):5.929.0011.8217.43

INCAR COVERAGEDenseUrbanSub urbanRural



Coverage Threshold (dBuV/m):53.853.853.853.8



Cell Range (km):3.473.965.167.46


&L&F&R&D

PWBGT1800_Combiner By Pass


GENERAL INFO

Frequency (MHz):1800System:DCS1800

RECEIVING END:BSMS


(Additional) Fast fading margindB2.002.00B






* Z = 77.2 + 20*log(freq[MHz])











CELL SIZES

COMMON INFODUUSUR




BPL Average (dB):21.012.08.04.0



Area Type Correction (dB)0.0-4.0-6.0-15.0


Roads width (m):30.030.030.030.0










Cell Range (km):0.370.851.746.13







Cell Range (km):1.882.933.658.30


&L&F&R&D

Nominal Cell Plan - ResultSragen UtaraSragen TimurSragen TengahSragen Barat

CW Test / Model TuningIn order to find out appropriate propagation model, RF Engineer should perform CW Test.Drivetesting should be performed encircle the route and represent all of azimuth.Input all of drivetesting result to the planning tools then conducting calibration to get appropriate propagation model.

SurveySurvey is required to ensure whether the nominal cell position can be realized or not ?In general, The RF Team should give alternative nominal or informed SAR ( 300m) to survey team, in case the nominal cannot be realized.The survey team should take the panoramic photo around the nominal (0-360 degree), and report to the RF team if appear obstacle around the nominal.Panoramic photo used to determine coverage target/azimuthSurvey team also need to survey : road to nominal, electricity, space for equipment.

Detail PlanningAll of nominal coordinates must be fixed in detail planning phase.Scope of works in Detail Planning :Frequency PlanningParameter Planning (BSIC, MAList, MAIO, HSN, etc)Adjacency planningThe main key in conducting frequency planning is avoiding co-channel and adjacent interference.For TCH Frequency planning, we able to apply SFH or Baseband hopping in order to reduce the interference.

Detail Planning Frequencies AllocationSFH Pattern 1x1 will be applied in this implementationNumber of Malist frequencies can be calculated by using equation :

Maximum configuration for the sites 5/5/5, so that number of required frequencies : Nfreqs/site = (12 3 ) x 2 + 3.2 = 24 Frequencies3 sectors with 24 hopping frequencies :TCH = 3 TRXs FL = (3/24)*100% = 12,5% TCH = 4 TRXs FL = (4/24)*100% = 16,67%

Detail Planning Frequencies AllocationMAIO= 08 16MAIO Step= 2SFH Allocation untill configuration 5/5/5

Detail Planning HSN PlanningDrivetest for QOD Program.ppt / 24.04.2008 / VSHSN used to the parameter that differentiates the hopping algorithm between two cells having the same MAList.We can choose best pairs HSN to reduce collision frequencies between server and adjacent.

Drivetest for QOD Program.ppt / 24.04.2008 / VS

Detail Planning Coverage ResultNCC = 4,5 NCC = 2,3NCC = 0,1 NCC = 5,6

Sheet1

BEST SERVER STATISTICS FOR GREATER THAN OR EQUAL TO

'Indoor'

[USER VECTORS: sragen_kota]

TOTAL DISPLAYED AREA (km):147.61

COVERAGE AREA (km):147.61

COVERAGE AREA (%):100.00

CATEGORYTOTAL DISPLAYED AREA (km)COVERAGE AREA (km)COVERAGE AREA (%)

unclassified0.000.000.00

open118.18118.18100.00

sea0.000.000.00

inlandwater0.010.01100.00

residential0.000.000.00

meanurban0.750.75100.00

denseurban0.000.000.00

buildings0.000.000.00

village28.2728.27100.00

industrial0.410.41100.00

openinurban0.000.000.00

forest0.000.000.00

parks0.000.000.00

denseurbanhigh0.000.000.00

blockbuildings0.000.000.00

denseblockbuild0.000.000.00

rural0.000.000.00

mixedsuburban0.000.000.00

CELLTOTAL DISPLAYED AREA (km)COVERAGE AREA (km)COVERAGE AREA (%)

Alun-AlunB1.451.45100.00

Alun-AlunA1.281.28100.00

Alun-AlunC2.492.49100.00

GemolongA2.632.63100.00

GemolongB3.163.16100.00

GemolongC3.233.23100.00

KedawungA2.972.97100.00

KedawungB4.004.00100.00

KedawungC4.334.33100.00

Ujung_kotaA7.507.50100.00

Ujung_kotaB5.525.52100.00

Ujung_kotaC3.263.26100.00

Batas_Kota_TimurA5.065.06100.00

Batas_Kota_TimurB3.483.48100.00

Batas_Kota_TimurC2.542.54100.00

Ringroad_ujungA1.961.96100.00

Ringroad_ujungB5.085.08100.00

Ringroad_ujungC3.553.55100.00

Ringroad_utaraA5.255.25100.00

Ringroad_utaraB2.422.42100.00

Ringroad_utaraC3.273.27100.00

PlumbunganA3.043.04100.00

PlumbunganB2.902.90100.00

PlumbunganC2.392.39100.00

KarangmalangA2.992.99100.00

KarangmalangB0.480.48100.00

KarangmalangC6.726.72100.00

Plumbungan_indahA2.712.71100.00

Plumbungan_indahB1.041.04100.00

Plumbungan_indahC2.062.06100.00

Batas_kota_2A2.282.28100.00

Batas_kota_2B3.713.71100.00

Batas_kota_2C3.193.19100.00

PungkrukA7.907.90100.00

PungkrukB5.465.46100.00

PungkrukC2.712.71100.00

MasaranA9.569.56100.00

MasaranB3.683.68100.00

MasaranC4.564.56100.00

SidodadiA0.360.36100.00

SidodadiB0.310.31100.00

SidodadiC0.470.47100.00

SidoharjoA0.700.70100.00

SidoharjoB0.660.66100.00

SidoharjoC1.531.53100.00

TerminalA0.180.18100.00

SambungmacanC0.730.73100.00

GesiC0.020.02100.00

PlupuhB0.020.02100.00

PlupuhC0.750.75100.00

TanonB0.030.03100.00

Sheet1


'Indoor'

[USER VECTORS: sragen_utara]






open98.9798.97100.00

sea0.000.000.00



meanurban0.000.000.00



village25.8125.81100.00



forest65.2965.29100.00

parks0.000.000.00




rural0.000.000.00



GemolongA9.519.51100.00

GemolongC0.580.58100.00


Ringroad_ujungC6.096.09100.00


MondokanA9.859.85100.00

MondokanB13.6013.60100.00

MondokanC9.269.26100.00

JenarA13.4813.48100.00

JenarB1.591.59100.00

JenarC4.174.17100.00

PlupuhA6.826.82100.00

PlupuhB4.134.13100.00

PlupuhC4.184.18100.00

NogosariA1.811.81100.00

NogosariB7.817.81100.00

NogosariC1.271.27100.00

SumberlawangA1.701.70100.00

SumberlawangB2.092.09100.00

SumberlawangC1.331.33100.00

WonosegoroA7.347.34100.00

WonosegoroB8.158.15100.00

WonosegoroC7.057.05100.00

Plupuh2A7.017.01100.00

Plupuh2B5.605.60100.00

Plupuh2C4.554.55100.00

KemusukA7.347.34100.00

KemusukB7.657.65100.00

KemusukC7.877.87100.00

TanonA8.398.39100.00

TanonB2.162.16100.00

TanonC5.255.25100.00

Sheet1


'Indoor'

[USER VECTORS: sragen_timur]






open61.5361.4899.92

sea0.000.000.00






village13.0012.9999.96



forest76.0976.09100.00

parks0.000.000.00




rural0.000.000.00



Ujung_kotaA0.060.06100.00

Ujung_kotaB0.290.29100.00

Ujung_kotaC0.050.05100.00

Plumbungan_indahA0.120.12100.00

Plumbungan_indahB1.171.17100.00

Batas_kota_2B0.010.01100.00

TerminalA5.385.38100.00

TerminalB5.045.04100.00

TerminalC2.912.91100.00

GondangA3.343.34100.00

GondangB5.755.75100.00

GondangC6.696.69100.00

SambungmacanA3.653.65100.00

SambungmacanB5.155.15100.00

SambungmacanC4.074.07100.00

WalikukunB6.376.37100.00

WalikukunC7.377.37100.00

GesiA6.106.10100.00

GesiB6.956.95100.00

GesiC6.006.00100.00

JamusA9.599.59100.00

JamusB6.616.61100.00

JamusC4.414.41100.00

BanaranA4.964.96100.00

BanaranB3.933.93100.00

BanaranC5.755.75100.00

SambirejoA3.283.28100.00

SambirejoC7.147.14100.00

NgargorosoC4.714.71100.00

TanonA1.381.38100.00

TanonB0.460.46100.00

WalikukunA6.206.2099.96

NgargorosoA9.149.1299.73

NgargorosoB1.831.8299.59

SambirejoB4.734.7199.58

Sheet1


'Indoor'

[USER VECTORS: sragen_barat]






open100.5698.9998.45

sea0.000.000.00






village44.4943.5597.88



forest0.000.000.00

parks0.000.000.00




rural0.000.000.00



MasaranA0.620.62100.00

SusukanB4.884.88100.00

SusukanC4.054.05100.00

Sidoharjo_baratB3.133.13100.00

Sidoharjo_baratC3.703.70100.00

GronongA3.013.01100.00

GronongB4.334.33100.00

GronongC4.344.34100.00

AndongB3.143.14100.00

Masaran2A3.543.54100.00

Sidodadi_MasaranA3.443.44100.00

Sidodadi_MasaranB2.202.20100.00

Batas_KaranganyarA2.272.27100.00

Batas_KaranganyarC3.783.78100.00

KlegoC2.532.53100.00

AmpelB3.473.47100.00

AmpelC3.093.09100.00

KebakkramatA4.934.93100.00

KebakkramatB2.722.72100.00

KebakkramatC3.023.02100.00

RejowingangunC3.523.52100.00

Sidodadi_MasaranC5.425.4299.95

Masaran2B5.175.1799.90

RejowingangunA3.883.8899.87

MasaranC1.331.3299.62

KaranggedheC3.493.4799.50

Sidoharjo_baratA3.903.8699.10

SusukanA5.605.5398.71

KaranggedheA4.424.3698.53

AmpelA4.654.5898.44

KaranggedheB5.305.1997.83

AndongC4.924.7796.90

Masaran2C4.694.5196.27

KlegoA4.634.4395.57

Batas_KaranganyarB3.673.4995.30

KlegoB8.698.1293.41

RejowingangunB1.231.1492.49

AndongA5.494.9790.53

Plupuh2C1.571.3284.37

PungkrukB0.020.000.00

Detail Planning Interference Prediction

Sheet1

WORST INTERFERER INTERFERENCE STATISTICS

Statistics shown are for interference levels greater

than or equal to : 'very good' [12dB].

[USER VECTORS: sragen_kota]

TOTAL COVERED AREA (km):147.61

POOR QUALITY AREA [< 12 dB] (km):0.75

POOR QUALITY AREA [< 12 dB] (%):0.50

GOOD QUALITY AREA [>= 12 dB] (km):146.87

GOOD QUALITY AREA [>= 12 dB] (%):99.50

CATEGORYTOTAL COVERED AREA (km)POOR QUALITY AREA (km)POOR QUALITY AREA (%)


open118.180.280.23

sea0.000.000.00






village28.270.471.65



forest0.000.000.00

parks0.000.000.00




rural0.000.000.00


CELLINTERFERERTOTAL COVERED AREA (km)POOR QUALITY AREA (km)POOR QUALITY AREA (%)

Batas_Kota_TimurAUjung_kotaC1.900.2312.24

KedawungABatas_Kota_TimurB1.890.168.44

Batas_Kota_TimurBKedawungA3.480.216.10

Alun-AlunBRingroad_utaraC1.440.064.17

Ringroad_utaraAAlun-AlunA5.240.050.91

Ringroad_ujungAPlumbunganA1.960.010.64

Ringroad_utaraCAlun-AlunB2.930.010.34

PungkrukAKarangmalangC7.900.010.13

STATISTICS GROUPED BY CELL

CELLTOTAL COVERED AREA (km)POOR QUALITY AREA (km)POOR QUALITY AREA (%)

Batas_Kota_TimurB3.480.216.10

KedawungA2.960.165.41

Batas_Kota_TimurA5.060.234.59

Alun-AlunB1.450.064.14



Ringroad_utaraC3.270.010.31

PungkrukA7.900.010.13

Sheet1

TOTAL INTERFERENCE STATISTICS



[USER VECTORS: sragen_barat]








open100.560.340.34

sea0.000.000.00






village44.490.200.44



forest0.000.000.00

parks0.000.000.00




rural0.000.000.00


Sheet1




[USER VECTORS: sragen_timur]








open61.530.240.39

sea0.000.000.00






village13.000.010.10



forest76.090.210.27

parks0.000.000.00




rural0.000.000.00


Sheet1




[USER VECTORS: sragen_utara]








open98.970.380.38

sea0.000.000.00






village25.810.301.17



forest65.290.560.85

parks0.000.000.00




rural0.000.000.00


Installation and System TuningAfter Installation done, the installation team need to conduct commisioning (VSWR Measurement, check hardware installation )The Drive test team also need to verify whether the BTS serving target correctly or not Then, Acceptance Test Procedure is conducted to check how well the KPI meets the demand.Pre Launch Optimization performed to achieve the KPI Target for new site or TRX expansion.

IDLE MODE OPERATIONNormal Cell Selection

Search all the RF channels , take samples during 3-5 s and calculate averages. And put them in ascending order with respect to signal level. Then tune to the strongest RF channel.

Search for the frequency correction burst in that carrier in order to varify if it is a BCCH carrierCamp on the cell

Try to synchronize to the carrier and read the BCCH data.

Is it a BCCH carrier?Is it a correct PLMN ?Is the cell barred?Is C1>0Tune to the next highest RF channel which is not tried beforeNoNoNoNoYesYesYesYesC1 = (A - Max(B,0))A = Received Level Average - p1B = p2 - Maximum RF Output Power of the Mobile Stationp1 = rxLevelAccessMin Min. received level at the MS required for access to the systemp2 = msTxPowerMaxCCHMax. Tx power level an MS may use when accessing the system

Cell Reselection

C1 + cellReselectOffset - temporaryOffset*H(penaltyTime-T) T < = penaltyTimeC2 =C1 + cellReselectOffset . T > penaltyTime1 when T < = penaltyTime H(x) = 0 when T > penaltyTime

Cell Reselection Histerysis

BSS ParameterBTS ParameterRxLevAMI (0-63) Minimum signal strength for access the BTS in idle mode.CRESOFF (Cell Reselection Offset) (0-25) used for C2 Calculation, normally used in dual band network (GSMDCS)RACHBT (RACH Busy Threshold) (0-127) defines a threshold for the signal level on the RACHHRACTT1 (0-100) Half Rate Activation ThresholdT3212 (0-255) Parameter LUP Periodically MAXRETR (1,2,4,7) Maximum Retransmission on RACH SDCCHCONGTH (0-100) SDCCH Congestion thresholdRDLNKTO (0-15) Timer for Radiolink timeout

Power Control ParameterLOWTLEVD/U (0-63) the lower threshold of the received signal level on the downlink/uplink for power increase UPTLEVU/D (0-63) defines the upper threshold of the received signal level on the uplink/downlink for power reductionLOWTQUAD/U (0-7) the lower threshold of the received signal quality on the downlink for power increaseUPTQUAU/D (0-7) defines the upper threshold of the received signal quality on the uplink for power reductionPWRINCSS (DB 2,4,6) defines the step size used when increasing the MS transmit powerPWREDSS (DB 2,4) defines the step size used when reducing the MS transmit power

BSS Parameter (2) Handover ParameterHOLTHLVDL/UL (0-63) defines the receive signal level threshold on the downlink /uplink for inter-cell level handover decision.HOLTHQUDL/UL (0-7) defines the receive signal quality threshold on the downlink/uplink for inter-cell quality handover decision

Adjacent ParameterRXLEVMIN the minimum received signal level the adjacent cell must provide to be regarded as a suitable target cell for handoverHOM Handover margin for better cellLEVHOM parameter defines the handover margin for handovers due to uplink level or downlink levelQUALLEVHOM this parameter defines the handover margin for handovers due to uplink quality or downlink quality

RF Optimization Flow ChartStartIdentify KPI FormulaIdentify the problemsSDSR Problems ?Check TRX QualityCheck AlarmCheck Interference Check all others cause (Radio link Failure, T200, Transcoder) from statisticsHOSRProblems ?Check SDCCH BlockingCheck TCH BlockingCheck AlarmCheck co-channel and co-BSICCheck InterferenceCheck Neighbor RelationCheck Handover Failure Per CauseCheck Handover ParameterDCR ProblemsCheck TRX QualityCheck AlarmCheck co-channel and co-BSICCheck TACheck Interference problemsCheck Malist, MAIO and HSNCheck measurement from statisticsTake Action listYY

Conclusion Every New Network need good plan for avoid problems that will be arise.Commonly there are six step in conducting planning.The most critical problems in performing cell planning process is interference.the New Sites onair need to be optimized to achieve the KPIPre Launch Optimization is done for new sites on air or expansion sites.

Flow chart of cell selection

Documents

GSM Cell Planning and Optimization