Workshop 3G Radio Network Parameter NSN

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1 © Nokia Siemens Networks 3G Radio Parameter for Optimization/ Amin Fauzan / 19 June 2012

3G Radio Network Parameter

Telkomsel’s Workshop Jan 18, 2012

Nokia Siemens Networks (NSN)




Content

1. Parameter Configuration

2. Coverage Parameter

3. Admission Control Parameter

4. Mobility Parameter




Content

1. Parameter Configuration2. Coverage Parameter






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ADJI

ADJS

FMCS

(NRT)

FMCS

(RT)

HOPS(RT)

HOPS

(NRT)

NrtHopsIdenti f ier = 1

RtHopsIdenti f ier = 2

HSDPAHopsIdentifier = 6

RTwithHSDPAHopsIdentifier = 3 HOPSid = 1

HOPSid = 2

FMCSid = 1

FMCSid = 1

ADJSid = 1

ADJDid = 1

WCEL

WCEL

WCELWBTS

Each WCEL hasassociated 1 FMCSfor NRT & 1 for RT &2 for HS(D)PA, all

can be reused forother cells.

Each ADJS has associated 1 HOPS for NRT, 1 for RT

& 2 for HSDPA, sets can be reused for other cells.)

NrtFmcsIdenti f ier = 3

RtFmcsIdenti f ier = 40

HSDPAFmcsIdenti f ier = 50

Mobility and

Neighboring Parameter

Configuration

FMCS

(HS(D)PA)FMCSid = 2

HOPS

(HSDPA)HOPSid = 6

HOPS

(RT)

HOPS

(NRT)HOPSid = 1

HOPSid = 5

HOPS

(HSDPA) HOPSid = 7

FMCS

(RT&HS(D)PA)FMCSid = 2

HOPS

(RTwHSDPA)HOPSid = 3

HOPS

(RTwHSDPA)HOPSid = 3


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Content





5. Packet Scheduler Parameter

1. Cell Selection2. Cell Re-Selection

3. CPICH Setting

4. RACH Preamble Procedure




Idle Coverage ParameterCell Selection

Qqualmeas (dB)(CPICH Ec/N0)

Qrxlevmeas (dBm)

CPICH RSCP

Qqualmin

( –24...0)

Qrxlevmin

( –115... –25)

Srxlev > 0

Pcompensation

Squal > 0 S-Criterion

fulfilledSqual >0 AND

Srxlev > 0

suitable

cell?

Squal = Qqualmeas – Qqualmin AND

Srxlev = Qrxlevmeas - Qrxlevmin – Pcompensation




Idle Coverage Parameter Cell Status and Special Reservation




Idle Mode ParameterCell Re-Selection

Measuredneighbours

Neighbour list

from BCCH

Best ranked cell

Measurement criteria

S – criteria

Suitableneighbours

R – criteria

Re-selection if not serving cell




Sintrasearch SintersearchSsearchRAT m

No need tomeasure

neighbourcells

Intra-frequency

Sx=Squal (in FDD mode)

Intra-frequencyInter-frequency

serving cell

Example: Nokia

Qqualmin

= -18 dB

Sintrasearch = 10dB

Sintersearch = 8dB

Ssearch_RAT = 4dB

When to performmeasurements

Intra-frequency

Inter-freqencyInter-RAT

Idle Mode ParameterCell Re-Selection : Measurement Rules

-8 dB-10 dB-14 dBEC/N0 =




• a cell-ranking criterion R was specified:

•Rs = Qmeas,s + Qhysts (for the serving cell)

•Rn = Qmeas,n - Qoffsets,n (for candidate neighbouring cells for cell reselection)

• The serving cell and the remaining candidate cells are ranked according to criterion R.

• The cell ranked with the highest value R is the best cell for the UE to camp on.

• Qhysts gives a hysteresis value to make the serving cell more attractive and thus delay the cell re-

selection.

• The value Qoffset is an offset given for each individual neighbouring cell, which ranges between –50

and 50 dB, with default set to 0.• Qoffset2/ Qhyst2s when Ec/No is used

• Qoffset1 Qhyst1s when RSCP is use

• Is the cell re-selection initiated immediately after the UE ranks a neighbouring cell to be the best?

•If so, we could face a ping-pong effect – a UE often performing cell reselection between two

neighbouring cells.

•To avoid this, the operator uses the time interval value Treselection, whose value ranges

between 0 and 31 seconds.•Only when a cell was ranked Treselection seconds better then the serving cell, a cell reselection

to this cell takes place.

•In addition to this, a UE must camp at least 1 second on a serving cell, before the next cell re-

selection may take place.

Idle Mode ParameterCell Re-Selection : R-Criterion




Rs = Qmeas,s + Qhysts

Rn = Qmeas,n - Qoffsets,n

Qmeas,n

Qmeas,s

Q m e a s

Rs

Rn

Qoffsets,n

Qhysts

Rn > Rs =>

„cell reselection“

Treselection

Cell Reselection: R-Criterion

CellSelQualMeas defined the measurement quantity to be used for cell reselection decision




CPICH Setting

• DL Common control channels must be heard over the whole cell, thus their power setting is designed

for “cell edge”.

• Most of Common Channels do not have a power control.

• The power of the common physical channels are set relative to the CPICH

• Setting the DL Common Control Channel Power is a trade off between:

• cell coverage: all the channels must be decoded at the cell edge

• cell capacity: the common channel power consume resources from the traffic channels

Pilot coverage

P-CCPCHcoverage In this example the mobile "sees"

the cell but cannot access it as itcannot decode the BCH




CPICH Setting

• By default the CPICH consumes 2 W of the Node B power for 20 W PA or 4 W for 40 W

PA around 10% of PA

• For optimization purposes, CPICH setting must consider the balance path loss and trade

off between overage and capacity

CPICH TransmitPower

Increased softhandover overhead

Too muchpower

Too littlepower

Less Power Available for traffic

CPICH coverageholes

Unreliable channelestimation

Early cell reselection/handover

IncreasedEb /Norequirement

Reduced systemcapacity


Reduced systemcoverage

Non - ideal trafficdistribution

Late cell reselection/handover


CPICH TransmitPower

Increased softhandover overhead

Too muchpower

Too littlepower

Less Power Available for traffic

CPICH coverageholes

Unreliable channelestimation

Early cell reselection/handout too early

IncreasedEb /Norequirement



Reduced systemcoverage


Late cell reselection/handout too late





Total DL Common Channel Power

Service

Type

Default

Power

Minimum

Activity

Minimum

Average

Power

Maximum

Activity

Maximum

Average

Power

CPICH 33 dBm 100 % 33 dBm 100 % 33 dBm

P-SCH 30 dBm 10 % 20 dBm 10 % 20 dBm

S-SCH 30 dBm 10 % 20 dBm 10 % 20 dBm

P-CCPCH 28 dBm 90 % 27.5 dBm 90 % 27.5 dBm

S-CCPCH 33 dBm 25 % 27 dBm 100 % 33.6 dBm

PICH 25 dBm 96 % 24.8 dBm 96 % 24.8 dBm

AICH 25 dBm 0 % - 80 % 24 dBm

Total - - 35.5 dBm

3.5 W

- 37.5 dBm

5.6 W




Random Access Procedure

Downlink / BS

Uplink / UEPreamble 1 PRACH Message part

…. ….

Preamble n

PRACH_preamble_retrans (8): The maximum number ofpreambles allowed in onepreamble ramping cycle

:RACH_tx_Max (8) # of preamblepower ramping cycles that can bedone before RACH transmission

failure is reported,

Acquisition indication

1st Preamble Power :

Primary CPICH TX power =33dBm (Broadcast per WCELL)DL RSCP = -80dBm (Measured by UE)

UL_IF = –100 dBm (Broadcast per WCELL)UL_Required_C/I = -25 dB (Parameter per WCELL)

UE PRACH First Preamble Power = 33 dBm – (-80 dBm) + (-100 dBm) + (-25 dB) = -12 dBm

PowerRampStepPRACHpreamble (2 dB)




Content

1. Parameter Configuration2. Coverage Parameter





UL Ad i i C l




UL Admission ControlLoad Based Admission Decision Process

Prx Target [dB]

PrxTarget [dB] + PrxOffset [dB]

load factor

Range [0..1]

N o i s e R i s e [ d B ]

Overloaded Area

Marginal Load Area

Feasible Load Area

WCEL:PrxTarget (0…30dB)(0.1dB)(4dB)

WCEL:PrxOffset (0…6dB)(0.1dB)(1dB)

dB Log

110 10PrxTarget =

UL Ad i i C t l




UL Admission ControlParameters

• When the non-controllable part of the cell load exceeds the target limit, AC will reject

those RAB establishment requests that would mean immediate UL load increase (i.e. RT

services) (not true for WPS call)

• The packet scheduler is responsible on handling the NRT bearer

• When load is too high bit rates are decreased etc.

• When the PrxTarget level hasbeen exceeded

• it is possible for the AC/PS to

admit NRT services (AC)• it is possible to schedule(allocate) bitrate for NRTservices

• bitrate (load) increase for NRTis not possible

Prx_NC[dBm]

PrxTotal[dBm]

PrxNoise [dBm] + PrxTarget [dB]

PrxNoise [dBm] + PrxTarget [dB] + PrxOffset [dB]

UL Admission Control




Prx_NC + Prx_SC + Prx_NC Prx_Target

Prx_Total < PrxTarget

RT RAB admitted (as well as NRT)

UL Admission ControlAdmission Decision

Prx_NC

Prx_Target_BS

Prx_Target

Prx_NC

Controllable load

Prx_SC

Power check

CASE 1

Prx_Target_BS

Prx_Target

RT RAB admitted as well asNRT Priority basedscheduling by PS

Prx_NC

Prx_SC

Prx_NC

Controllable load


PrxTotal > Prx_Target

Power check

CASE 2

UL Ad i i C t l




RT RAB admitted (NRTpermitted) - Overload

Control by PS

Prx_Target_BS

Prx_TargetControllable load

Prx_NC

Prx_NC

Prx_SC


Prx_total > Prx_Target_BS

UL Admission ControlAdmission Decision

CASE 3

Prx_Target_BS

Prx_Target

Prx_NC

Prx_NC

RT RAB denied (NRT RAB permitted) RTover NRT triggered

or directed retry to GSM for AMR voiceservice

Controllable load

Prx_SC

Prx_NC + Prx_SC + Prx_NC > Prx_Target

Prx_total < Prx_Target_BS

CASE 4

DL Admission Control




DL Admission ControlLoad Based Admission Decision Process

Ptx Target [dBm]

Ptx Target [dBm] + PtxOffset [dB]

load factor

t o t a l t r a n s m i t t e d

p o w e r

P t x T o

t a l [ d B m ]

Overloaded Area

Marginal Load Area

Feasible Load Area

Cell MaximumWCEL:PtxTarget (-10…PtxCellMax)(0.1dBm)(40dBm)

WCEL:PtxOffset (0…6dB)(0.1dB)(1dB)

WCEL:PtxCellMax(0…50dBm)(0.1dB)(43dBm)





DL Admission ControlDL Cell Load Admission Criteria Thresholds

• For the RB to be established (non streaming service requests) the increase of the non-

controllable load Ptx_nc is estimated on the basis of the measured

• Then the estimated non-controllable DL power is compared against the threshold

• If the equation is NOT satisfied then the RAB can NOT be admitted!

total tx P _

P tx_nc = P tx_total – P tx_nrt admitted txtxnctx P P P

, _

tx_targettx_nctx_nc P P P





Ptx_NC

RT RAB admitted(as well as NRT)

DL Admission ControlDL Admission Decision

Ptx_NC

Ptx_Target_BS

Ptx_Target

Case I Case II

Ptx_NC

Ptx_NC

Controllable load

Controllable load

RT RAB admitted(as well as NRT)

Priority based Scheduling

tx_targettx_nctx_nc P P P tx_targettx_nctx_nc P P P





Ptx_NC

RT RAB admitted (as well asNRT) Overload actionsstarted by PS

DL Admission ControlDL Admission Decision

Ptx_NC

Ptx_Target_BS

Ptx_Target

Case IV

Ptx_NC

Ptx_NC

Controllable load

Controllable load

Case III

tx_targettx_nctx_nc P P P tx_targettx_nctx_nc P P P

RT RAB denied (NRT RAB permitted)

RT over NRT pre emption or Directed

retry to GSM for AMR voice call




Admission Control in Case of Congestion

• Congestion can happen in UTRAN logical and physical resources

• Radio resources (uplink interference, DL power)

• Spreading code

• BTS hardware

• Iub, Iur transmission resources

• RNC HW capacity

• In the first four cases, forced data rate downgrades or releases can be applied to arrange capacity for

an arriving resource request, the available features are

• RT over NRT feature

• RT RAB pre-emption

RT NRT




RT over NRT

• Establishment of a conversational or streaming (RT) RAB requires that resources from the NRT are

removed

• Triggered by

• Resource request for an RT RAB

• Resource request for an RRC connection setup to establish RT RAB or signalling

• IE establishment cause of the RRC Connection Request message is "Registration",

"Detach", "Originating High Priority Signaling", "Terminating High Priority Signalling", "Inter-

RAT cell re-selection", "Inter-RAT cell change order", "Originating Conversational Call",

"Terminating Conversational Call", "Originating Streaming Call", "Terminating StreamingCall" or "Terminating - cause unknown"

• Actions

• Downgrade NRT RAB/DCH resources

• Target RAB

• RAB with highest maximum bit rate

RT RAB P ti




RT RAB Pre-emption

• RT RAB pre-emption is triggered when it is not possible to establish a prioritised RAB without

releasing lower priority real time (RT) bearers

• Triggered by

• Prioritised RAB

• Allocation/Retention Priority: “may trigger pre-emption”

• By default in Nokia CN only emergency calls

• Resource request for an RRC connection setup to establish emergency call

• IE establishment cause of the RRC Connection Request message is “Emergency call”

• Actions

• Release the DCH allocation of the target RAB

• Target

• Pre-emption vulnerability indicator of the RAB attribute Allocation/Retention priority is set to "pre-

emptable“ Default all calls but not emergency calls

• RABs with lower Allocation/Retention priority level






Content





Soft Handover




Soft Handover

• SHO UE connect to more than one cells (active set)

• Supported Event in SHO : Event 1a (Addition). Event 1b (Deletion), Event 1C (Replacement)\

• 1A and 1B reporting range is defined by strongest active set cell

• 1C reporting range is defined by weakest active set cell

• Handover decision performed by RNC based on measurements and available resources

• Admission Control can reject the branch addition in case the maximum load is achieved in DL(threshold + offset), valid both for RT and NRT bitrates.

• Hard blocking may prevent branch addition

• The Handover measurement is based on CPICH Ec/Io

WCDMA F1 WCDMA F1 WCDMA F1

Soft Handover




Soft Handover1A: A Primary CPICH Enters the Reporting Range

Strongest CPICH in AS

time

Ec /Io

P CPICH 3

P CPICH 1

P CPICH 2

1

Addi t ionWindow

(4dB)

Addit ionTime

(100ms) Additio nRepor ting Interval (0.5 s)

RNC

MeasurementReport

Add tothe AS?

no

Act iveSetWeightin gCoefficient (0)

2

3 4

Soft Handover




Strongest CPICH in AS

time

Ec /Io

P CPICH 3

P CPICH 1

P CPICH 2

3

DropWindow (6dB)

DropTime (640 ms )

MeasurementReport

1B: A Primary CPICH leaves the Reporting Range

Remove thereported cellfrom the AS

1

2

3



Soft Handover




Individual Ncell Offset

time

P CPICH 1

P CPICH 2

P CPICH 3

Reporting Range

ReportingEvent 1B

ReportingEvent 1A

AdjsEcNoOffset

Enlarging Cell 3 by x dB

Ec /Io



Soft Handover signalling




Branch addition

RRC: Measurement Report (e1a)

RRC: Active Set Update

RRC: Active Set Update Complete

RRC: Measurement Report (e1b)

RRC: Active Set Update

RRC: Active Set Update Complete

Branch deletion

Soft Handover signalling

Inter-RNC Soft HO




Inter RNC Soft HO

• Inter-RNC soft Handovers are performed if:

• RNC: IurUPSupport indicates the support of the

user plane over Iur

• HOPS: EnableInterRNCsho indicates whether

cell can participate in a SHO

EnableInterRNCsho

cell3 cell2

cell1

cell4

cell6

cell5

RNC RNCIurUPSupport

EnableInterRNCsho

• Otherwise, HCchecks whether

Hard Handover is

possible

IFHO – ISHO Process Overview




IFHO ISHO Process Overview

HO Triggering Thresholds set in RNC

Event Triggered Coverage/Capacitybased HO fulfilled in RNC

RNC commands selected UE(s) to startIF/IS measurements

Measurements are done inCompressed Mode (CM)

UE reports GSM cells withstrongest RSSI signals to RNC

RNC makes HO decision andcommands UE to target cell

RSSI measurements and BSIC

verification for GSM cells

1

2

3

4

IFHO/ISHO measurements- difference




IFHO/ISHO measurements difference

• IF measurements

• IS measurements

• BSIC verification required in case neighbour list includes multiple GSMneighbours using the same RF carrier

WCDM A

IS-HOMeasurementTrigger Target Cell found

RSSI meas. BSIC verification

IS-HODecision

WCDM A

IF-HOMeasurement

TriggerTarget Cell found

IF -measurements

IF-HODecision



Measurement Trigger CPICH EcNo / CPICH RSCP




ggReporting event: 1E: CPICH exceeds an absolute threshold

1F: A P-CPICH falls below an absolute threshold (HO triggered if all)

Time

Cell 1 Cell 2

Cell 3

absolute

threshold

C P I C H E c / N o o r R S

C P

1E: HHoEcNoCancel (-9 dB)

HHoRscpCancel (-102 dBm)

1E: HHoEcNoCancelTim e (1280 ms ) /

HHoRscpCancelTime (1280 ms)

1F: HHoEcNoThr eshol d (-12 dB)HHoRscp Thresho ld (-105 dBm)

1F: HHoEcNoTimeHysteresis (120 ms )

HHoRscpTimeHyst eresis (100 ms )

Measurement Trigger CPICH EcNo / CPICH RSCP




• RNC starts IF/IS measurement when event 1F occurs for all cells in the active set: A

Primary CPICH becomes less than an absolute threshold

• RNC stops IF/IS measurement when event 1E occurs for at least one cell of the active set: A Primary CPICH becomes better than an absolute threshold

• Note: Without ISHO Cancellation Feature, IF/IS measurements can be stopped if

event 1Fs are cancelled by events 1E only when IFHO/ISHO was not successful and

only inside the time for CM measurements, specified by the

parameters FMCI:InterFreqMinMeasInterval,FMCG:GsmMinMeasInterval default 2s.

• With the feature, ISHO cancellation is still possible after target cell selection

• Filtering applied before event evaluation in the UE:

• FMCS: EcNoFil terCoeff icient/ HHoRscpFil terCoeff icient = 200ms filtering period

gg

Reporting Events 6A, 6B and 6D




p g ,

timetime to

trigger

U E T x P o

w e r

UE TransmittedPower Tx Threshold

6B

6A

6D

min(UEtxPowerMaxDPCH , P_MAX)

6A: The UE Tx power exceeds an absolute threshold

6B: The UE Tx power falls below an absolute threshold

6D: The UE Tx power reaches its maximum value (Not used in Nokia RAN)

InterfreqUETxPwrTimeHyst (10 ms)

GSMUETxPwrTimeHyst (10 ms )

ISHO Parameters




Decision Algorithm

UE Tx Power (Event 6A)•Threshold:GsmUETxPwrThrXX•L3 filter: GsmUETxPwrFilterCoeff•Hysteresis margin: GsmUETxPwrTimeHyst•Data rate thresholdHHOMAxAllowedBitrateUL

UL Quality•Timer:ULQualDetRepThreshold•Data rate thresholdHHOMAxAllowedBitrateUL

DL DPCH power•Threshold:GsmDLTxPwrThrXX

•Data rate thresholdHHOMAxAllowedBitrateDL

(XX=AMR,CS,NrtPS,RtPS)

CPICH RSCP (Event 1F)•Thresholds:HHoRscpThresholdHHoRscpCancelL3 filter: HHoRscpFilterCoefficient•Timers:

HHoRscpTimeHysteresisHHoRscpCancelTime

CPICH Ec/Io (Event 1F)•Thresholds:HHoEcNoThresholdHHoEcNoCancel•L3 filter:Done already for SHO•Timers:

HHoEcNoTimeHysteresisHHoEcNoCancelTime

AdjgTxPwrMaxTCH AdjgRxLevMinHO (n)GsmMeasAveWindow

GsmMeasRepIntervalGsmNcellSearchPeriodGsmMinMeasIntervalGsmMaxMeasPeriod

Handover Triggering

Handover Execution

2G-to-3G back prevention

GsmMinHoInterval

GSM measurement reporting



IFHO/ISHO Measurements




• After HO triggering message is sent to RNC, a RRC message ”Measurement Control” is

sent to UE containing details of the measurement that the UE must execute. Measurement

reporting is periodical. Max 6 IF/GSM cells could be measured by UE and reported toRNC. No filtering in measurements by UE

• Upon reception of the measurements reported by the UE, RNC applies a sliding averaging

window to the RXLEV measurements. The averaged levels are used as input to the IS-HO

decision algorithm.

RNCRRC: ”Measurement control ” message

UE

RNC

RXLEV for ISHO and CPICH EcNo/Rscp for IFHO

measurements are reported through”Measurement report” messages

UE

RRC: ”Measurement report”

RRC: ”Measurement report”

GsmMeasRepInterval or AdjiMeasRepInterval

(default 0.5s)

- GSM RSSI measurement

- Carrier “2” measurement

Inter System Handover MeasurementsGSM RSSI measurements -timing-

Aim of NcellSearchPeriod :




Trigger

RNC commands WBTS and UE to perform CM

no Handover to GSM/IF allowed Handover to GSM / IF allowed

t

UE sends Hit-List in Measurement Reports accordinginter-RAT list provided from RNC

GSMMeasRepInterval : 0.5 s, 6 cells per report 3s or

InterFreqMeasRepInterval : 0.5 s, 6 cells per report 3 s

GSMMaxMeasPeriod : 6 reports or

InterFreqMaxMeasPeriod : 6 reports GSMNcellSearchPeriod : 3 or

InterFreqNcellSearchPeriod : 3

1.5 sec

Aim of NcellSearchPeriod :

Wait until enough measurements of NB cells are available for RNC to

identify target cell.

Value 0,1 means: 1 Measurement Report need to arrive in RNC to decide

Value 2,3,N means: 2,3,N Measurement Reports need to arrive in RNC to decide

3 sec

If no target cell found, procedure may restart

if trigger occurs again. Waiting for

GSMMinMeasInterval :2 s or

InterFreqMinMeasInterval : 2 s

T=0

RNC starts receiving window(sliding)

plus 4x GSMMeasRepInterval for ISHO

(default implementation; here: 2sec) BSIC verif ication

IFHO Decision




1. Quality Criterion in case trigger was DL DPCH Power or CPICH Ec/No:• Signal level from new cell > required Signal level in new cell + adjustment due to allowed power

AVE_RSCP_NCELL (n) > Ad jiMinRSCP(n) + max(0, Ad jiTxPw rDPCH(n) - P_MAX)

• EcNo on new cell better than EcNo in old cell + margin

AVE_EcNo_NCELL (n) > AVE_CPICH_EcNo + Ad jiEcNoMargin(n)

2. Pathloss Criterion in case trigger was UE Tx Power, CPICH RSCP or UL DPCH

Quality: • EcNo on new cell better than required EcNo in new cell (default –14 dB)

AVE_EcNo_NCELL (n) > AdjiMinEcNo(n)

• PathLoss in old cell > PathLoss in new cell + Margin (default 2 dB)

CPICH_POWER - AVE_CPICH_RSCP >

CPICH_POWER_NCEL L (n) - AVE_RSCP_NCELL (n) + Ad jiPlossMargin (n)

ISHO Decision




The following conditions have to be satisfied, before an inter-system Handover can be conducted. The

best neighboring cell must fulfil following criterion („best“ according to Ec/No):

AVE_RXLEV_NCell(n)

> AdjgRxLevMinHO(n) + max(0, AdjgTxPwrMaxTCH(n) - P_max) where

AVE_RXLEV _Ncell(n) is the averaged GSM carrier RSSI value of the GSM neighbor

cell(n), averaging done directly from dBm values (no linear averaging); FMCG:

GSMMeasAveWindow / 6, 1…32 meas report.

AdjgRxLevMinHO(n) determines the minimum Required RSSI (dBm) level of the neighbor

cell(n).

AdjgTxPwrMaxTCH(n) indicated the maximum Tx power level (dBm) an UE may use in

GSM neighbor cell(n).

P_MAX is the maximum UE power capability.

• If several GSM cells fulfil the equation above, cells are ranked based on HOPG:AdjgPrior i tyCoverage/0 , range 0…7

• A cell is ranked higher than another cell if it has a higher priority level even though its signal

strength condition was worse






Thank You

Documents

Workshop 3G Radio Network Parameter NSN