3g-Radio-Parameter-Rev-01.pdf

(1)

3G Ericsson

Radio Parameter

TELKOMSEL

(2)



Idle Mode



Handover



Power Control



Capacity Management



Channel Switching



HSDPA

(3)

Idle Mode and Common Channel

behavior

(4)

Cell Selection 3G part

Criteria for Cell Selection

Squal > 0 , Squal = Qqualmeas-qQualMin

qQualMin (only for WCDMA cells) and

Srxlev > 0 , Srxlev = Qrxlevmeas-qRxLevMin

qRxLevMin - Pcompensation (for all cells)

Pcompensation = max (maxTxPowerUl

maxTxPowerUl - P, 0)

Qqualmeas > qQualMin

qQualMin

(-18dB)

and

Qrxlevmeas > qRxLevMin

qRxLevMin

(-115dBm)

- max (maxTxPowerUl

maxTxPowerUl

(24dB)

- P, 0)

qQualMin :

qQualMin : indicates the minimum required quality value in the cell. It is sent in

system information, in SIB3 for the serving cell, and in SIB11 for adjacent cells

qRxLevMin :

qRxLevMin : indicates the minimum required signal strength in the cell. It is sent

in SIB3 for the serving cell and in SIB11 for adjacent cells

maxTxPowerUl :

maxTxPowerUl : indicates the maximum allowed transmission power when the

UE accesses the system on RACH. It is broadcast in SIB3

(5)

Cell Selection 3G part

Q

qualmeasqualmeas

(dB)

(CPICH E

c

/N

0

)

Q

rxlevmeasrxlevmeas

(dBm)

CPICH RSCP

qQualMin

((

–

18)

qRxLevMin

((

–

115)

Srxlev > 0

Pcompensation Pcompensation

Squal > 0

Squal >0 ANDSqual >0 ANDSrxlev > 0Srxlev > 0

suitabl

e

cell?

Squal = Qqualmeas

Squal = Qqualmeas – qQualMinqQualMin

Srxlev = Qrxlevmeas

-Srxlev = Qrxlevmeas -qRxLevMinqRxLevMin – Pcompensation Pcompensation Pcompensation = max(

(6)

Cell Reselection 3G part

First according to S criteria

Squal > 0 (only WCDMA cells)

Srxlev > 0

The cells are ranked according to the R criteria:

R(serving) = Qmeas(s) + qHyst(s)

R(neighbor) = Qmeas(n) - qOffset(s,n)

qualMeasQuantity

qualMeasQuantity =x

qHyst1

qHyst1 : Based on CPICH RSCP

qHyst2

qHyst2 : Based on CPICH Ec/No

qHyst(s)

qOffset(s,n)

qOffset1sn

qOffset1sn : Based on CPICH RSCP

qOffset2sn

qOffset2sn : Based on CPICH Ec/No

(1 ) qHyst(s) and qOffset(sn) based on CPICH RSCP only

(2 ) With this setting the UE first makes qHyst(s) and qOffset(sn) based on CPICH RSCP . If a GSM cell is highest ranked, no more ranking is done. If a WCDMA neighbor is highest ranked, a second ranking takes place, this time according to CPICH Ec/No, and excluding all GSM neighbors

(7)

Cell Reselection 3G part

R CRITERIA :

R(serving) = Qmeas(s) + qHyst(s)

R(neighbor) = Qmeas(n) - qOffset(s,n)

Note that parameter qOffset1sn

qOffset1sn works identically for WCDMA-GSM and

WCDMA-WCDMA neighbor relations.

But the values of GSM RSSI and WCDMA CPICH RSCP are not of the same

nature and therefore not directly comparable.

[CPICH RSCP] = [GSM RSSI] + 7

As an example a measured RSCP on a WCDMA CPICH of -100 dBm would be

comparable to a GSM broadcast channel RSSI of -93 dBm. A parameter setting

of a GSM neighbor to

qOffset1sn

= +7 will thus make the received signal

strength in the WCDMA and the GSM cell comparable.

(8)

Cell Reselection 3G part

The decision about when intrafrequency measurements are performed is made using the

sIntraSearch parameter in relation to Squal:

•

If the Squal > sIntraSearchsIntraSearch, the UE does not need to perform intrafrequency measurements. • If the Squal <= sIntraSearchsIntraSearch value, the UE performs intrafrequency measurements.

• If the

sIntraSearch

sIntraSearch =

0 dB

, is not sent to the serving cell, the UE performs intrafrequency measurements.

MEASUREMENT ON

MEASUREMENT ON INTRA A

INTRA AND

ND INTER-RA

INTER-RAT

T NEIGHBOR

NEIGHBOR

The decision about when GSM measurements are performed is made using the sRatSearch

parameter in relation to Squal and the sHcsRat parameter in relation to Srxlev:

• If the Squal > sRatSearchsRatSearch and the Srxlev > sHcsRatsHcsRat, the UE does not need to perform measurements on GSM cells.

• If the Squal <= sRatSearchsRatSearch value and/or the Srxlev <= sHcsRatsHcsRat value, the UE performs measurements on GSM cells.

Squal <= sRatSearch

sRatSearch

Qqualmeas-qQualMin

qQualMin <= sRatSearch

sRatSearch

Qqualmeas <= qQualMin

qQualMin

(-18dB)

+ sRatSearch

sRatSearch

(4dB)

Srxlev <= sHcsRat

sHcsRat

Qrxlevmeas-qRxLevMin

qRxLevMin – Pcompensation <= sHcsRat

sHcsRat

Qrxlevmeas <= qRxLevMin

qRxLevMin

(-115dBm)

+

0

0 + sHcsRat

+ sHcsRat

(3dB)

(9)

Cell Reselection 3G part

Measurements on GSM Neighbors

(10)

Cell Reselection 3G part

First ranking of all the cells based on First ranking of all the cells based on CPICH RSCP (WCDMA

CPICH RSCP (WCDMA) and ) and RSSI (GSM)RSSI (GSM) Rs = CPICH RSCP/GSM RSSI + Rs = CPICH RSCP/GSM RSSI + Qhyst1Qhyst1 Rn= CPICH_RSCP(n) or RXLEV(n) - Qoffset1 Rn= CPICH_RSCP(n) or RXLEV(n) - Qoffset1

Rn higher in GSM cell Rn higher in GSM cell Yes Yes NoNo Cell re-selection Cell re-selection to GSM to GSM

Second ranking only

Second ranking only for WCDMA cells based onfor WCDMA cells based on CPICH Ec/No

CPICH Ec/No Rs = CPICH Ec/No + Qhyst2 Rs = CPICH Ec/No + Qhyst2 Rn= CPICH Ec/No -Qoffset2 Rn= CPICH Ec/No -Qoffset2

Cell re-selection to Cell re-selection to WCDMA

WCDMA cell cell of of highesthighest R value R value

GSM cell measurements GSM cell measurements available If : available If : CPICH Ec/No

CPICH Ec/No – qQualMin < SRatS earch Rs = Serving WCDMA cell

Rs = Serving WCDMA cell calculation, with calculation, with hysteresis parameter hysteresis parameter Rn = Neighbour W

Rn = Neighbour WCDMA or GSMCDMA or GSM cell calculation with offset cell calculation with offset parameter

parameter

If a TDD or GSM cell is ranked as the best cell, then the UE must perform cell re-selection to that TDD or GSM cell.

If a FDD cell is ranked as the best cell and

cell_selection_and_reselection-quality_measure is set to CPICH RSCP, the UE shall perform cell re-selection to that FDD cell. If a FDD cell is ranked as the best cell and

cell_selection_and_reselection-quality_measure is set to CPICH Ec/No, the UE shall perform a second ranking of the FDD cells according to the R criteria using the measurement quantity CPICH Ec/No calculating the R values of the FDD cells.

qHyst1 = 4 dB qOffset1sn = 0 dB qQualMin = -18 dB sRATsearch = 4 dB qOffset1sn = 7 dB qRxlevMin = -115 dBm Qhyst2 = 4 dB qOffset2sn = 0 dB R S C P R S S I

(11)

Cell Reselection 2G part

Never

-54

…

-70

-74

-78

Always

-74

…

-94

-98

dBm

15

14 …

10

9

8

7

6 …

1

0 Value

If RLA_C < -94 UE starts If RLA_C < -94 UE starts 3G measurements 3G measurements UE always measures 3G UE always measures 3G cells cells UE never measures 3G UE never measures 3G cells cells If RLA_C > -70 UE starts If RLA_C > -70 UE starts 3G measurements 3G measurements

Measurements on 3G Neighbors

The parameters QSI

QSI and QSC

QSC define thresholds and also indicate whether these

measurements shall be performed when the signal strength (SS) of the serving cell is below or

above the threshold. QSI

QSI is used for idle and packet switched modes and broadcast on BCCH

and PBCCH (if enabled), while QSC

QSC is used for active mode, sent on SACCH

There are 4 different scenarios to choose from. Parameters QSIQSI and QSCQSC are set per GSM cell and define both the scenario and the necessary threshold, at the same time:

• UTRAN neighboring cells are measured only when the signal strength of the GSM serving cell isabove

the threshold set by QSIQSI and QSCQSC

• UTRAN neighbor cells are measured only when the signal strength of the GSM serving cell isbelow the threshold set by QSIQSI and QSCQSC .

• UTRAN neighbor cells are always measured.

• UTRAN neighbor cells are never measured. This can be used to turn off the cell reselection/handover to UMTS, per cell, even if COEXUMTSCOEXUMTS is ON for the BSC.

(12)

Cell Reselection 2G part

Example 1: If an UTRAN cell should serve purely to extend the coverage for

Multi-RAT MSs in GSM, it is logical to set QSI

QSI /QSC

QSC values from 0-6, since it's only

needed to make cell reselection and handovers to UMTS when the GSM coverage

falls low.

(13)

Cell Reselection 2G part

Example 2: If an UTRAN cell is co-sited with a GSM cell, there is a certain

correlation between signal strengths of the two systems. If the GSM is for example

using 900MHz band it is very probable that the GSM signal strength will always be

higher than the UTRAN signal, for a number of dBs. Therefore, there is no point in

measuring UTRAN cells in low GSM signal conditions and values 8-14 can be

selected accordingly.

(14)

Cell Reselection 2G part

Criteria :

CPICH Ec /No > FDDQMIN

FDDQMIN

(-13dB)

and

CPICH RSCP > RLA(s+n) + FDDQOFF

FDDQOFF

(-infinite)

28 24 … 0 … -20 -24 -28 -32 (infinity) dBm 15 14 … 8 … 3 2 1 0 Value

Always select irrespective of Always select irrespective of

RSCP value RSCP value Reselect in case RSCP > GSM Reselect in case RSCP > GSM RXLev (RLA_C) +28dB RXLev (RLA_C) +28dB

FDDQOFF

Value 0 1 2 3 4 5 6 7 dBm -20 -6 -18 -8 -16 -10 -14 -12

FDDQMIN

(15)

Cell Reselection 2G part

Cell Reselection List

WCDMA cell reselectio n BCCH: FDDQMIN, FDDQOFF DEFAULT: DEFAULT: fdd cell reselect offset: fdd cell reselect offset:

select always select always (value is -infinity) (value is -infinity) minimum fdd minimum fdd threshold = -8 dB threshold = -8 dB Check levels every 5s

from serving GSM cell and best 6 GSM

neighbour cells

UE starts WCDMA measurements if Rxlev

running average (RLA_C) is below or above

certain threshold:

RLA_C

QSI or QSC

UE can select WCDMA cell if the level of the

serving GSM and non-serving GSM cells has been

exceeded by certain offset for a period of 5 s:

CPICH RSCP >

CPICH RSCP > RLA_C

RLA_C +

+

FDDQOFF

RSCP > (aveRxLev) + -32

UE will re-select WCDMA cell in case it's

quality is acceptable:

CPICH Ec/No

FDDQMIN

EcNo

EcNo -8

-8 dB

dB

Compare levels of all GSM cells to WCDMA neighbour Check quality of neighbour WCDMA cells, no priorities between WCDMA neighbours 0 5 . 0 8 : T h i s m a y t a k e u p t o 3 0 s

QSI

QSI = 7(always)

FDDQOFF

FDDQOFF = -32 dB

FDDQMIN

FDDQMIN = -8 dB

(16)

Idle Mode Parameter Summary

Cell Selection and Reselection Cell Selection and Reselection

accessClassNBarred

Indicates whether or not access class N is barred ( N = 0 to 15). 0 : not barred

1 : barred

Start from least significatant bit: bit 0 : class 0 bit 1 : class 1 bit 2 : class 2 ... bit 15 : class 15 bandIndicator

Indicates the frequency band of the external GSM cell.

The BCCH frequency is unique for all GSM bands except the two GSM bands DCS1800 and PCS1900, so the band indicator i s needed to discriminate between the two. When the ExternalGsmCell has a BCCH frequency indicating some other frequency band, then the band indicator is not needed and may be set to "Not applicable".

bcchFrequency BCCH frequency code in the GSM cell. Contains the absolute radio

frequency channel number of the BCCH channel for the GSM cell. It uniquely identifies the BCCH.

cellReserved Indicates if this cell shall be reserved for operator use. If it is reserved,

there will be no service to the UEs.

fachMeasOccaCycLenCoeff

Fach Measurement Occasion Cycle Length coefficient. A factor used when the UE performs inter-frequency and inter-system measurements. The UE uses this parameter to calculate the interval length in order to determine the repeating cycle of the measurement.

0 : not broadcasted in SIB 11. 1 : not used.

2 : not used.

3 : used when inter frequency and GSM neighbours. 4 : used when inter freqency or GSM neighbours. 5 - 12 not used.

interFreqFddMeasIndicator Inter-frequency FDD measurement indicator.

FALSE = No TRUE = Yes

(17)

Idle Mode Parameter Summary

maxTxPowerUl

The maximum UE transmission power on the RACH when accessing the system. Used in UE functions for cell selection/reselection in idle mode and connected mode. Also used by UTRAN to control the maximum TX power level an UE may use.

If the current UE uplink transmit power is above the indicated power value, the UE shall decrease the power to a level below the power value. Value launched by System information (SIB11) for each intra-frequency measurement object corresponding to adjacent cells of serving cell. Unit: 1 dBm Resolution: 1 -50: -50 dBm ... 33: 33 dBm

100 : Default value. The parameter is not sent in SIB11 and the UE will use the maximum output power for this GSM cell, according to its radio access capability.

maxTxPowerUl (serving cell, WCDMA neighbor within same RNC) maxTxPowerUl (WCDMA neighbor belonging to another RNC) maxTxPowerUl (GSM neighbor)

mcc

The MCC part of the PLMN identity used in the GSM radio network.

The PLMN identity consists of two parts: 1. MobileCountryCode, MCC, 3 digits 2. MobileNetworkCode, MNC, 2 or 3 digits Example: If MCC=125 and MNC=46 then plmnId=12546.

mnc The MNC part of the PLMN identity used in the radio network. The PLMN identity consists of two parts:

1. MobileCountryCode, MCC, 3 digits 2. MobileNetworkCode, MNC, 2 or 3 digits Example: If MCC=125 and MNC=46 then plmnId=12546.

nmo Network operation mode that indicates whether the Gs interface between the SGSN and MSC/VLR is installed.

(18)

Idle Mode Parameter Summary

qHyst1 _{Cell reselection hysteresis used in UE functions i n idle and connected}

mode. Value launched by System information (SIB3).

Resolution: 2

qHyst2 The hysteresis value of the serving cell. Used to perform cell ranking

for the serving cell.

Resolution: 2

qOffset1sn Signal stength offset between source and target cells. Used when the

IE "cell_selection_and_reselection_quality_measure" in SIB 11/12 is set to "CPICH RSCP". This is configured through

UtranCell::qualMeasQuantity. Unit: 1 dB Resolution: 1 -50 : -50dB -49 : -49dB -48 : -48dB ... 50 : 50dB

qOffset1sn (WCDMA neighbor relation) qOffset1sn (GSM neighbor relation) qOffset2sn (WCDMA neighbor relation)

qQualMin _{Used in UE functions for cell selection/reselection in idle mode and}

connected mode. Minimum required (acceptable) quality level in the cell (dB). Used to set cell border between two cells.

Unit: 1 dB Resolution: 1 -24 : -24dB ... 0 : 0dB

100 : Indicates that the minimum quality level has not been specified by the operator. The parameter is then not

present in SIB11 for this neighbour. The UE will use the serving cell value (UtranCell MO value) instead.

qQualMin (serving cell, WCDMA neighbor within same RNC) qQualMin (WCDMA neighbor belonging to another RNC)

(19)

Idle Mode Parameter Summary

qRxLevMin _{Used in UE functions for cell selection/reselection in idle mode and}

connected mode. Minimum required (acceptable) RX level in the cell. (dBm). Value launched by System information (SIB11) for each intra-frequency measurement object corresponding to adjacent cells of serving cell. Unit: 1 dBm Resolution: 2 -115 : -115dBm -113 : -113dBm -111 : -111dBm -109 : -109dBm ... -25 : -25 dBm

100 : Indicates that the minimum Rx level has not been specified by the operator. The parameter is then not

present in SIB11 for this neighbour. The UE will use the serving cell value (UtranCell MO value) instead.

qRxLevMin (serving cell, WCDMA neighbor belonging to same RNC) qRxLevMin (WCDMA neighbor belonging to another RNC)

qRxLevMin (GSM neighbor)

qualMeasQuantity Used in UE functions for cell selection/reselection in idle and

connected mode. Cell selection and reselection quality measure. Value launched by System information (SIB3, SIB11 and SIB12).

sHcsRat RAT specific threshold in the serving cell used in the inter-RAT

measurement rules.

This parameter is used by the UE to decide when to start GSM measurements for cell reselection, if the serving cell is indicated to belong to a Hiearachical Cell Structure (HCS)

GSM measurements in idle mode and state CELL_FACH are started by the UE when RSCP <= qRxLevMin + sHscRat.

If sHcsRat is set to a negative value, this will be interpreted as 0 by the UE (according to 3GPP TS 25.331).

Unit: 1 dB Resolution: 2

(20)

Idle Mode Parameter Summary

sInterSearch The decision on when measurements on inter frequencies shall be

performed.

If a negative dB value is configured the UE interprets the negative value as 0 dB. Unit: 2 dB Resolution: 1 0 : not sent 1 : -32 dB 2 : -30 dB ... 27 : 20 dB

sIntraSearch The decision on when measurements on intra frequencies shall be

performed.

If a negative dB value is configured, the UE interprets the negative value as 0 dB. Unit: 2 dB Resolution: 1 0 : not sent 1 : -32 dB 2 : -30 dB ... 27 : 20 dB sRatSearch

The decision on when measurements on GSM frequencies shall be performed is made using this parameter in relation with Squal. If S_qual > this parameter, UE need not perform measurements on GSM cells.

If S_qual <= this paramter, UE shall perform measurment on GSM cells.

If a negative value is configured the UE interprets the negative value as 0. Unit: 1dB Resolution: 2 -32 : -32dB -30 : -30dB ...

(21)

Idle Mode Parameter Summary

treSelection Control of cell selection/reselection. Time-to-trigger for cell reselection

in seconds.

Value launched by System information (SIB3).

uarfcnDl Downlink Utra Absolute Radio Frequency Channel Number.

Specifies the channel number for the central DL frequency. The mapping from channel number to physical frequency is described in 3GPP specification TS 25.104.

Unit: Channel number Resolution: N/A

uarfcnUl Uplink Utra Absolute Radio Frequency Channel Number.

Specifies the channel number for the central UL frequency. The mapping from channel number to physical frequency is described in 3GPP specification TS 25.104.

Unit: Channel number Resolution: N/A

(22)

Idle Mode Parameter Summary

Location and Routing Area Updating Location and Routing Area Updating

att Indicates to the UE whether IMSI attach/detach is allowed. (Some IMSIs are not allowed in some LAs.) This helps to facilitate the avoidance of unnecessary paging attempts. The value is sent on the BCCH.

FALSE: IMSI attach not allowed TRUE: IMSI attach allowed

lAC The Location Area Code of t he external GSM cell.

Note: the values 0000 and FFFE are reserved for special cases where no valid LAI exists in the MS.

Old name: lAC

rAC Routing Area Code of a routing area. An RA is used by UTRAN to page mobiles on request from the PS CN.

When the parameter is changed, UTRAN shall update system information and notity UEs.

Old name: rAC

t3212 Periodic update timer for LA update.

Unit: 0.1 hours (= 1 decihour = 6 minutes = 360 seconds) Resolution: 1

(23)

Idle Mode Parameter Summary

PagingPaging

cnDrxCycleLengthCs Core Network DRX cycle length coefficient (k) for UEs in idle mode,

circuit switched.

The cycle length is calculated as the k'th potential of 2, where k = 6..9. For example, 6 corresponds to cycle length 640 ms, 7 corresponds to cycle length 1280 ms, etc.

cnDrxCycleLengthPs Core Network DRX cycle length coefficient (k) for UEs in idle mode,

packet switched.

The cycle length is calculated as the k'th potential of 2, where k = 6..9. For example, 6 corresponds to cycle length 640 ms, 7 corresponds to cycle length 1280 ms, etc.

noOfMaxDrxCycles Paging notification duration.

To notify UEs in IDLE mode about a system information update, the RNC sends a paging message on the PCH at every page occasion of a number of maximum DRX cycles.

noOfPagingRecordTransm

Number of preconfigured subsequent transmissions of the same Paging Record.

System Information System Information

noOfMibValueTagRetrans Number of MIB value tag retransmissions on the FACH.

sib1PlmnScopeValueTag The area identity part of PLMN scope value tages for SIB1

sib1RepPeriod sib3RepPeriod sib5RepPeriod sib7RepPeriod sib11RepPeriod sib12RepPeriod sib1StartPos sib3StartPos sib5StartPos sib7StartPos sib11StartPos sib12StartPos

sib7ExpirationTimeFactor SIB7 use expiration time as re-read mechanism. The expiration time is

sib7RepPeriod times sib7ExpirationTimeFactor.

updateCellReattsNo Number of update reattempts when an update of system information

(24)

UE States



Idle mode



No connection to radio network (No RRC connection established)



This minimizes resource utilization in UE and the network



CELL_FACH mode



_{User Equipment (UE) in Connected Mode (has an RRC Connection to}

radio network)



UE uses the common transport channels RACH or FACH



If the parameter interFreqFDDMeasIndicator = 1, the UE will evaluate cell

reselection criteria on inter-frequency cells (0)



CELL_DCH mode



User Equipment (UE) in Connected Mode (has an RRC Connection to

radio network)



UE uses dedicated channels for transmitting data and signalling

Idle Mode Behaviour

(25)

(26)

 primary CPICH power should be 8 to 10% (~ 1 Watt) of the nominal RBS power at the reference point (~10W, while MCPA is 20W)

 The pilot power is designed to be equal in all cells at the Reference Point.

 primaryCpprimaryCpichPower = 30 ichPower = 30 dBmdBm

 TopOfRack = primaryCpichPower + primaryCpichPower + dlAttenuation

dlAttenuation

 _{System will adjust the TopOfRack to meet the required} value.

 Consistency check on

MaximumTransmissionPowerDL

MaximumTransmissionPowerDL (Calculated vs. setting value)

 The feeder loss parameters ulAttenuationulAttenuation & dlAttenuation

dlAttenuation and electrical delay parameters ulElectricalDelay

ulElectricalDelay & dlElectricalDelaydlElectricalDelay must be entered properly in the system (actual VSWR).

 More CPICH – less capacity trade off TopOfRackTopOfRack P-CPICH P-CPICH MaxTxPowerDL MaxTxPowerDL dl/ulAttenuation dl/ulAttenuation dl/ElectDelay dl/ElectDelay

(27)

Common Control Channel Power



With increasing CPICH power – capacity directly decreasis, but common channels and

power per each dedicated channel is calculated from CPICH



At CPICH 30 dBm, the common channel will be configured as follow:

PPaarraam

meetteer r N

Naam

mee

M

MO

O TTyyppee

VVaalluuee

C

Cuum

mm

m((ddB

Bm

m))

PPeeaak

k PPoow

weerr((W

W))

TTyyppiiccaal l A

AFF

A

Avvg

g PPoow

weerr((W

W))

primaryCpichPower UtranCell 30 1 1 1 pchPower Pch -0.4 29.6 0.91 0.20 0.18 primarySchPower UtranCell 1.8 - 28.2 0.66 0.10 0.07 secondarySchPower UtranCell 3.5 - 26.5 0.45 0.10 0.04 maxFach1Power Fach 1.8 31.8 1.51 0.10 0.15 maxFach2Power Fach 1.5 31.5 1.41 0.30 0.42 bchPower UtranCell 3.1 - 26.9 0.49 0.90 0.44 aichPower Rach -6 24 0.25 0.10 0.03 pichPower Pch -7 23 0.20 1.00 0.20 38.38 6.89 2.53

(28)

Common Channel on Downlink

Cell Setup and Reconfiguration -

Cell Setup and Reconfiguration - DownlinkDownlink

primaryCpichPower is the power used for transmitting the PCPICH.

bchPower is the power used for transmitting on the BCH, relative to the primaryCpichPower value.

primarySchPower is the power used for transmitting on the Primary SCH, relative to the primaryCpichPower value.

secondarySchPower is the power used for transmitting on the Secondary SCH, relative to the primaryCpichPower value.

Common Transport Channel Setup and Reconfiguration -

Common Transport Channel Setup and Reconfiguration - DownlinkDownlink

aichPower is the power used for transmitting on AICH, relative to the primaryCpichPower value.

maxFach1Power defines the maximum power used for transmitting the first FACH channel, relative to the

primaryCpichPower value. The first FACH is used for logical channels BCCH, CCCH, and DCCH control si nalin .

maxFach2Power defines the Maximum power used for transmitting the second FACH channel, relative to the

primaryCpichPower value. The second FACH is used for logical channel DTCH traffic signaling.

pOffset1Fach is the offset between downlink DPDCH and DPCCH TFCI field on FACH.

pOffset3Fach is the offset between downlink DPDCH and DPCCH pilot field on FACH.

pchPower is the power used for transmitting on the PCH, relative to the primaryCpichPower value.

(29)

Common Channel on Uplink

Common Transport Channel Setup and Reconfiguration -

Common Transport Channel Setup and Reconfiguration - UplinkUplink

constantValueCprach is a constant value in dB used by the UE to calculate the initial power on the PRACH according to

the Open Loop Power Control procedure.

powerOffsetP0 is the Power ramp step for the preamble when no acquisition indicator is received.

powerOffsetPpm is the Power offset between the last transmitted preamble and the control part of the random

access message.

preambleRetransMax is the maximum number of preambles sent in one RACH preamble ramping cycle.

(30)

Common Channel on Uplink

P_RACH

The initial power on the PRACH - the power of the first preamble - is determined according to equation

P_PRACH = L_PCPICH + RTWP + constantValueCprach

constantValueCprach

(-27dB)

L_PCPICH : is the path loss estimated by the UE based on knowing the transmitted and received PCPICH power.

RTWP : is the Received Total Wideband Power (uplink interference) level measured by the RBS.

constantValueCprach

constantValueCprach : is used by the UE to calculate the initial power on the PRACH . This parameter is configurable and decides at which level below RTWP preamble ramping will start

(31)

Common Channel on Uplink

POWER RAMP ON RACH

To reach an appropriate received power level at the RBS, the UE uses preamble ramping. This

procedure consists of the following steps:

• The UE transmits a preamble.

• As soon as the RBS properly detects the preamble, it sends an Acknowledgement Indicator

(AI) on the AICH.

• While not receiving any AI, the UE transmits a new preamble, increasing the transmission

power with respect to the previous one by the configurable parameter powerOffsetP0

powerOffsetP0

.(3dB)

• As soon as the UE receives an AI, it sends the PRACH message part. The power of the

control part of the random access message is determined by the power of the last

transmitted preamble and by a configurable offset powerOffsetPpm

powerOffsetPpm

.(- 4dB)

The power of

the data part of the PRACH message is determined by the gain factors for PRACH, which is

included in System Information.

(32)

Common Channel on Uplink

POWER RAMP ON RACH



preambleRetransMax

(8)

parameter determines

how many times PRACH preamble can be sent

within one preamble ramping cycle (SIB5&6)



maxPreambleCycle

(4)

defines how many times

the PRACH preamble ramping cycle procedure can

be repeated before UE MAC reports a failure on

RACH transmission to higher layers (SIB5&6)

(33)

Common Channel on Uplink

 In average coverage conditions the RRC Connection Setup performance can be improved by tuning the open loop power control parameters

 These parameters are

 preambleRetransMpreambleRetransMax ax andand & maxPreambleCyclemaxPreambleCycle

 powerOffsetPpmpowerOffsetPpm

 powerOffsetP0powerOffsetP0

maxPreambleCycle maxPreambleCycle

# preamble power ramping cycles that can be done_{before RACH transmission failure is reported}

Downlink

BS

L1 ACK / AICH

Uplink

MS

Preamble 1

Not detected

Message part

Preamble 2 Preamble preambleRetransMax preambleRetransMax

# PRACH preambles transmitted during one PRACH cycle without receiving AICH response

MaxTXPowerUl MaxTXPowerUl

… …

powerOffsetP0 powerOffsetP0 powerOffsetPpm powerOffsetPpm Initial preamble power

(34)

(35)



Soft/Softer Handover



Inter-Frequency Handover



Inter-RAT Handover



Inter-RAT Cell Change

(36)

 Intra-Frequency HandoverIntra-Frequency Handover

SOFTER HANDOVER

 MS simultaneously connected to multiple cells (handled by same BTShandled by same BTS)  No extra transmissions across Iub interface

 Mobile Evaluated HandOver (MEHO)

 Both UL and DL: Maximum Ratio Combining (MRC) is occurring in rake receiver

SOFT HANDOVER

 MS simultaneously connected to multiple cells (from different BTSsfrom different BTSs)  Extra transmission across Iub, more channel cards are needed  Mobile Evaluated HandOver (MEHO)

 DL/UE: MRC

 UL/RNC: Frame selection combining

HARD HANDOVER

 Arises when inter-RNC SHO is not possible (Iur not supported or Iur congestion)  Decision procedure is the same as SHO (MEHO)

 Causes temporary disconnection  Inter-Frequency HandoverInter-Frequency Handover

Can be intra-BS, intra-RNC, inter-RNC

Network Evaluated HandOver (NEHO)  Inter-RAT (Inter-system) Handover Inter-RAT (Inter-system) Handover

(37)

Entities Involved in Reporting, Evaluation, and Execution of Handover-Related Functions. The concept of event-triggered reporting

The concept of event-triggered reporting as specified in 3GPP is used by handover evaluationis used by handover evaluation and allows the UE to do some part of the evaluation.

Thus, the UE is configured to evaluate and send measurement reports to the system only when certain events occur, that is, when a monitored cell is measured and the measurement result for a monitored cell fulfills certain criteria. When the conditions for triggering a certain handover are fulfilled, the handover evaluation part triggers the corresponding handover execution part.

Entities Involved in Reporting, Evaluation, and Execution of Handover-Related Functions.

(38)

3GPP-defined UE Associated Cell sets for Measurement

Active Set

•The cells involved in soft handover and measured by the UE

Virtual Activ

Virtual Active

e Set

Set

•The Active Set associated with a non-used frequency for support of Inter-Frequency

evaluation

Monitored Set

•The cells only measured by the UE and not part of the Active Set. The monitored set can

consist of intra-frequency, Inter-Frequency and Inter-RAT cells

Detected Set

•The intra frequency cells(P-CPICH scrambling codes) detected by the UE but not part of

Active Set or monitored set

(39)

Soft/Softer Handover

Event 1a, A primary CPICH enters the Reporting

Event 1a, A primary CPICH enters the Reporting Range

Range

(measured PCPICH Ec/No) > (PCPICH Ec/No of the Best Cell in the Active Set)

-reportingRange1a

reportingRange1a +

+ hysteresis1a

hysteresis1a /2

/2

Event 1b, A primary CPICH leaves the

Event 1b, A primary CPICH leaves the Reporting Range

Reporting Range

When a P-CPICH, not included in the Active Set, enters reportingRange1a + reportingRange1a + hysteresis1a/2hysteresis1a/2, and the measured value remains in reportingRange1a + hysteresis1a/2reportingRange1a + hysteresis1a/2 at least a time equal to timeToTrigger1atimeToTrigger1a (Time to Trigger 1a), event 1a occurs. The UE sends a MEASUREMENT REPORT message for event 1a to the SRNC. If the report contains more than one cell fulfilling 1a criteria, only the one with highest Ec/No is considered and retained. If the retained cell is a valid cellIf the retained cell is a valid cell and Active Set is not full (present cells in the Active Set is less than maxActiveSetmaxActiveSet parameter), the cell is proposed to be added to the Active Setthe cell is proposed to be added to the Active Set. If

the Active Set is full, the cell is proposed as a replacement of the worst cell in the Active Set provided that the reported cell has a better quality than the worst cell in the Active Set.

(measured PCPICH Ec/No) < (PCPICH Ec/No of the best cell in the Active Set)

-reportingRange1b - hysteresis1b /2

reportingRange1b - hysteresis1b /2

When a P-CPICH, included in the Active Setincluded in the Active Set, leaves reportingRange1b - hysteresis1b /2reportingRange1b - hysteresis1b /2, and the measured value is outside reportingRange1b - hysteresis1b /2reportingRange1b - hysteresis1b /2 during a time at least equal to timeToTrigger1b

timeToTrigger1b, event 1b occurs. The UE sends a MEASUREMENT REPORT message for event 1b to the SRNC. The handover algorithms will remove the reported cells one by one from the Active Set, however one cell is always kept in the Active Set for maintaining the connection.

(40)

Soft/Softer Handover

Cell (P_CPICH2) Would

be proposed to be

included in Active Set

List

Cell (P_CPICH2) Would

be proposed to be

excluded from Active

Set List

Event 1a and Event 1b

3dB

5dB

320 ms

(41)

Event 1c, A non-activ

Event 1c, A non-active primary

e primary CPICH becomes better than

CPICH becomes better than an A

an Active Primary

ctive Primary

CPICH

Soft/Softer Handover

When a P-CPICH, not included in the Active Set, becomes stronger than the

weakest P-CPICH+hy

P-CPICH+hysteresis1c steresis1c /2/2 in t he Active Set during a time at least equal to timeToTrigger1c,and the Active Set is full (present cells in the Active Set is equal to maxActiveSet

maxActiveSet parameter) event 1c occurs. The UE sends a

MEASUREMENT REPORT message for event 1c to the SRNC. If the retained cell is a valid cell, and the Active Set is full, the cell is proposed as a replacement for the weakest cell in the Active Set

(measured P-CPICH Ec/No) > (P-CPICH Ec/No of the Best Cell in the Active Set) +

hysteresis1c /2

Cell (P_CPICH4) Would

be replaced P_CPICH3

in active set list

Hysteresis1c (1dB)

320 ms 320 ms

(42)

Soft/Softer Handover

Parameter Summary

Setting Value

Remark

reportingRange1a

6 3 dB

reportingRange1b

10 5 dB

timeToTrigger1a

11 320ms

timeToTrigger1b

12 640ms

timeToTrigger1c

11 320ms

timeToTrigger1d

14 2560ms

hysteresis1a

0

0 hysteresis1b

0

0 hysteresis1c

2 1dB

hysteresis1d

15 7dB

maxActiveSet

3

(43)

Inter-RAT Handover

Event 2d, The Estimated Quality of the Currently Used frequency is below a

Certain Threshold

When the estimated quality of the current WCDMA RAN used frequency is below the absolute threshold usedFreqThresh2d

usedFreqThresh2dEcno - Ecno - hysteresis2d/2hysteresis2d/2, during a time at least equal to timeToTrigger2dEcnotimeToTrigger2dEcno,OR the estimated quality of the current WCDMA RAN used frequency is below the absolute threshold

usedFreqThresh2d

usedFreqThresh2dRscp - Rscp - hysteresis2d/2hysteresis2d/2, during a time at least equal to timeToTrigger2dRscptimeToTrigger2dRscp, event 2d occurs.

Event 2f, The estimated quality of the currently used frequency is above a

certain threshold

When the estimated quality of the current WCDMA RAN used frequency is above the relative threshold usedFreqRelThresh

usedFreqRelThresh2fEcno+used2fEcno+usedFreqThresh2dFreqThresh2dEcno Ecno + + hysteresis2f/2hysteresis2f/2, during a time at least equal to timeToTrigger2fEcno

timeToTrigger2fEcno,A ND the estimated quality of the current WCDMA RAN used frequency is above the relative threshold usedFreqRelThrusedFreqRelThresh2fRscp+uesh2fRscp+usedFreqThreshsedFreqThresh2dRscp 2dRscp + + hysteresis2f/2hysteresis2f/2, during a time at least equal to timeToTrigger2fRscptimeToTrigger2fRscp event 2f occurs. The UE sends a MEASUREMENT REPORT message for event 2f to the SRNC. When SRNC receives the MEASUREMENT REPORT message for event 2f from the UE, measurements for IRATHO_eval event 3a or IFHO_eval event 2b and associated compressed mode usage is stopped.

(44)

Inter-RAT Handover

UE start compressed

mode to measure GSM

or Interfreq Neighbors

UE stop compressed

mode

-12 dB -12 dB 1 + (-12 dB) 1 + (-12 dB) 640 640 ms ms 2560 2560 msms

Compressed Mode and de-Compressed Mode

usedFreqThresh2d usedFreqThresh2dRscp Rscp ::100 dBm100 dBm usedFreqRelThre usedFreqRelThresh2fEcno sh2fEcno ::3 dB3 dB timeToT timeToTrigger2dRsrigger2dRscp :cp :640 ms640 ms timeToTrigger2fRscp : timeToTrigger2fRscp :2560 ms2560 ms

(45)

Event 3a, The Estimated Quality of the Currently Used UTRAN

Event 3a, The Estimated Quality of the Currently Used UTRAN Frequency is

Frequency is

below a Certain Threshold and the Estimated Quality of the Other System is

above a Certain Threshold

The event 3a occurs according to the following points:

• When the estimated quality of the WCDMA RAN used frequency is below the threshold usedFreqThresh2dE

usedFreqThresh2dEcno+utranRelcno+utranRelThresh3aEcno - Thresh3aEcno - hysteresis3a/2hysteresis3a/2 andand the measured GSM carrier RSSI of a GSM/GPRS cell is above the absolute threshold gsmThresh3agsmThresh3a, during a time at least equal to

TimeToTrigger3a TimeToTrigger3a

• when the estimated quality of the WCDMA RAN used frequency is below the threshold usedFreqThresh2dR

usedFreqThresh2dRscp+utranRelscp+utranRelThresh3aRscp - Thresh3aRscp - hysteresis3a/2hysteresis3a/2 andand the measured GSM carrier RSSI of a GSM/GPRS cell is above the absolute threshold gsmThresh3agsmThresh3a, during a time at least equal to

TimeToTrigger3a TimeToTrigger3a

• in case of the connection quality has been triggered in UL for UE TX power (event 6a, see Event 6a, The UE Tx Power becomes larger than an Absolute Threshold), the event 3a is triggered when the estimated quality of the WCDMA RAN used frequency is below the threshold

usedFreqThresh2dR

usedFreqThresh2dRscp+utranRelscp+utranRelThresh3aRscpThresh3aRscp+utranRelT+utranRelThreshRscp hreshRscp - - hysteresis3a/2hysteresis3a/2 andand the measured GSM carrier RSSI of a GSM/GPRS cell is above the absolute threshold gsmThresh3agsmThresh3a , during a time at least equal to TimeToTrigger3aTimeToTrigger3a.

(46)

Inter-RAT Handover

(-12 dB) + (-1dB) (-12 dB) + (-1dB) RSSI -95dB RSSI -95dB 320 ms 320 ms usedFreqThresh2dR usedFreqThresh2dRscp scp ::100 dBm100 dBm utranRelThresh3aRsc utranRelThresh3aRscp p ::- 3 dB- 3 dB

(47)

(48)

(49)

The Capacity Management solution consists of three main functions:

1. Dedicated Monitored Resource Handling

The Dedicated Monitored Resource Handling function is responsible for keeping

track of the utilization of critical resources in the system. The utilization of these

resources provides information that is used by Admission and Congestion Control

functions to control the cell load.

2. Admission Control

The Admission Control function is responsible for controlling the utilization of

dedicated monitored resources by accepting or refusing requests for usage of

these resources.

3. Congestion Control

The Congestion Control function is responsible for detecting and resolving overload

situations on certain dedicated monitored resources.

(50)

Downlink Channelization Code

Admission Policy

Total Downlink Channelization code usage are calculated as follow :

Sum

_user

(1/SF

_user

) + Sum

_CCH

(1/SF

_CCH

)+Sum

_code

(1/SF

_{code HS-DSCH}

)

Where:

(80%)

(5%)

(51)

Downlink Channelization Code

Admission Policy

To reserve codes for users in handover, there is code blocking for non-handover

requests, while requests for handover are not blocked by the downlink

channelization code admission policy. It should be noted that handover requests

can fail on the allocation of the downlink code and this is detected when allocating

the downlink code.

Downlink code allocation policy for the non-handover requests is shown in

1.(Non-guaranteed, non-handover) admission requests are blocked when the

resource usage exceeds dlCodeAdm - beMarginDlCode

dlCodeAdm - beMarginDlCode.

2. (Guaranteed, non-handover) and (guaranteed-hs, non-handover) admission

requests are blocked when the resource usage exceedsdlCodeAdm

dlCodeAdm.

(52)

The Histogram Monitor keeps track of the following resources:

Spre adi ng Fa ctor u sage in dow

nlink.

It adds information about downlink

channelization code usage. This is achieved by keeping track of the

number of connections that are using certain code lengths. The histogram

monitor gives information per spreading factor. It should be noted that the

monitor does not count the codes (spreading factor = 16) reserved for

HSDPA connections.

Sprea ding Fa cto r usage in uplink

.

This measurement aims at avoiding

overload of uplink RTWP due to the usage of the (optional) PS384/HS radio

connection type. The histogram monitor gives information per spreading

factor.

Numb er of Compressed Mode ra

dio links.

This measurement is used to

avoid too much interference from the compressed mode radio users.

Num ber of HSDP A us ers allocated to th

e H S- DSCH.

This measurement

provides the HSDPA usage in a cell. The monitor of this dedicated resource

is obtained by tracking the number HS-serving radio links in a cell. This

includes both PS64/HS and PS384/HS radio connection types.

(53)

Histogram Admission Policy

1. Non-Guaranteed Service Class Limits in Downlink

(32)

(16)

(8)

(54)

Histogram Admission Policy

2. Guaranteed Service Class Limits in Downlink

Admission Control blocks (guaranteed, <any>) admission requests demanding

spreading factor 16 in downlink (streaming PS16/128 radio connection type) when

the usage of this spreading factor exceeds sf16gAdm

sf16gAdm

(16)

(16).

3. Guaranteed-hs Service Class Limits in Uplink

Admission Control blocks (guaranteed-hs, <any>a) admission requests demanding

spreading factor 4 in uplink (PS384/HS radio connection type) when the usage of

this spreading factor exceeds sf4AdmUl

sf4AdmUl

(0)

(0).

4. Compressed Mode Radio Links Limits

Admission Control blocks admission requests for a radio link in compressed mode

when the current number of radio links exceeds the parameter compModeAdm

compModeAdm

(15)

(15).

5. Number of Simultaneous HS-Serving Links Lim

its

Admission Control blocks new radio link admission requests which involve the

allocation to PDSCH/SCCH when the number of users assigned to the

HS-DSCH in the cell exceedshsdpaUsersAdm

hsdpaUsersAdm

(10)

(10).

(55)

The Downlink Transmitted Carrier

Power Admission Policy

(75%)

(10%)

(56)

WCDMA to GPRS (PS)

3G-SGSN

SRNC

BSC

2G-SGSN

GGSN

RBS

Iu

Gb

Abis

Iub

Gn

External

Networks

Gi

(57)

SRNC

SRNC CN/SGSN Target BSS

CELL_DCH

1. DCCH (AM) ”Measurement Report” (Event 2d) 2. Evaluation of MR 3. Compressed Mode Control

4. DCCH (AM) ”Measurement Control” 5. DCCH (AM) ”Measurement Report”(Event 3a)

6. Evaluation of MR 7. DCCH (AM):CELL_DCH Cell Change Order from UTRAN

8. GSM: RA Update

10. Stop DL Transmission

12. ”Iu Release Command”

14. ”Iu Release Complete” 13. Dedicated Radio Link Release

A successful IRATCC from

WCDMA to GPRS

9. ”SRNS Context Request”

(58)

GSM to WCDMA (voice) :

Measurements on WCDMA Cells

Four different scenarios:



WCDMA RAN neighbor cells are measured only when the signal strength of the

GSM serving cell is

above

the threshold set by

the threshold set by QSI and

and QSC..



WCDMA RAN neighbor cells are measured only when the signal strength of the

GSM serving cell is

below

the threshold set by QSI and

the threshold set by

and QSC..



WCDMA RAN neighbor cells are

WCDMA RAN neighbor cells are always measured.

always measured.



WCDMA RAN neighbor cells are

WCDMA RAN neighbor cells are never measured.

never measured.

This can be used to turn off the cell reselection/handover to WCDMA, per cell,

even if

COEXUMTS

(parameter used to activate the functionality of making

handovers and cell reselections between GSM and WCDMA) is on for the BSC.

(59)

(60)

(61)

Load sharing

• Load sharing to 2

Load sharing to 2

nd

carrier at RRC establishment

Least loaded cell (Highest difference between power and pwradm) is

chosen by sending RRC connection reject with redirection info to 2

nd

carrier.

• Directed Retry to

Directed Retry to GSM at RAB establishment

GSM at RAB establishment

When Dl power reaches ‘loadSharingGsmThreshold’ percentage of

pwradm, calls are targeted to be offloaded to GSM. This is achieved

by rejecting RAB establishment requests with ‘directed retry’ as a

cause.

(62)

Load sharing capabilities

(63)

Inter-Frequency Load Sharing



Inter-Frequency Load Sharing



At call set-up - RRC Connection Establishment for all

RABs



Triggered by Downlink Transmitted Carrier Power

**

(load on source > 50%

and

load on target less than

source by a 10 % margin)



The feature is activated in an RNC by setting the

parameter loadSharingRrcEnabled to TRUE



The attribute loadSharingCandidate TRUE/FALSE

specifies whether the target cell is a load-sharing neighbor

of the source cell

f1

f2

(64)

Inter-Frequency Load Sharing

(RRC redirection) (Extra Slide)

RNC RNC

”RRC Connection Request”

CCCH/RACHCCCH/RACH

”RRC Connection Reject”

CCCH/FACHCCCH/FACH

Idle

Mode

Cell selection

on designated

UTRA carrier

”RRC Connection Request”

CCCH/RACHCCCH/RACH

”RRC Connection Setup”

CCCH/FACHCCCH/FACH

F

1

F

₂

Includes ‘Frequency

Info’ IE

2

nd

_{will not be}

redirected but may

be successful or

rejected due to

congestion

(65)

Directed retry to GSM

Applicable for voice in P3

WCDMA

GSM

Admission Admission Control Control

(66)

Directed retry to GSM



Directed retry to GSM



At call set-up - RAB Establishment for voice



Triggered by Downlink Transmitted Carrier Power



The feature is activated in an RNC by setting the parameter

loadSharingDirRetryEnabled to TRUE



One GSM target can be defined for each WCDMA cell via the cell

parameter directedRetryTarget



loadSharingGsmThreshold specifies the minimum load at which

off-loading to GSM begins: ex 80% of pwrAdm



loadSharingGsmFraction specifies the percentage of Directed Retry

candidates to be diverted to GSM while the cell load is above the

(67)

Directed Retry to GSM

UE

RBS/RNC

CN

Directed Retry decision to send Successful access to GSM Contacts GSM cell and orders relocation

HO from UTRAN command

RAB Assignment Request

RAB Assignment Response (failed, cause=directed retry) Relocation Required

Relocation Command

Iu release Command Iu release Complete

Voice calls can be relocated to GSM due to high load in WCDMA

If the call is not accepted in GSM - try in WCDMA again!

(68)

When out of coverage, the

WCDMA voice call is handed

over to GSM

When GSM load reaches a

customizable threshold, voice calls can

be handed over to WCDMA

GSM coverage

Dual Mode UE Dual Mode UE

GSM terminal GSM terminal

Load balancing for voice between

WCDMA-GSM

Load based handover to GSM

during call set up, Directed Retry

(P3) to GSM

Introduction

Features & Roadmap

(69)

(70)

Channel Switching Parameter Summary

Channel Switching

(71)

1. Common to Dedicated Evaluation

Channel Switching

Monitors if the UE shall be switched from a common to a dedicated transport

channel due to large amount of user data buffered in the RNC or the UE.

2. Dedicated to Dedicated Up-Switch Evaluation

Monitors if the throughput becomes close to the max user bandwidth and switch to

the next higher bitrate radio bearer is required.

2a. Dedicated to Dedicated Coverage triggered Down-Switch Evaluation

Monitors if a switch to a lower rate radio bearer is required due to coverage.

3. Dedicated to Common Evaluation

Monitors if a switch from a Cell_DCH to Cell_FACH is required due to a decrease

in transmitted user data.

4. Common to Idle Evaluation

Monitors if a switch from Cell_FACH to Idle mode is required due to a complete

lack of user data transmission.

(72)

Multi-RAB Down-switch Evaluation

Channel Switching

Monitors if a release (or downswitch) of PS I/B RAB shall be initiated due to lack of

PS data throughput (zero), resulting in a single speech 12.2 kbps (or speech + PS

0/0) or CS64 RAB.

Multi-RAB Up-switch Evaluation

Monitors if an upswitch from multi-RAB SP0 to multi-RAB SP64 shall be initiated

due to data buffered in either RNC or UE.

(73)

Future releases

Channel Switching

activity/inactivity-based switching UL and/or DL DL throughput-based upswitch UL throughput-based upswitch coverage-triggered downswitch (DL only) choice based on UE-and cell-capability IDLE FACH

DCH

HS

384/HS 64/384 64/HS 64/128 64/64 128/128

stand-alone interactive RAB

speech + 0/0 speech + 64/64 speech + 64/HS speech + 384/HS

speech +

speech + interactive

interactive

RAB

PS RAB Establishment

Low/No RLC buffer load for Inactivity timer period Low/No throughput

Measurement for down Switch timer period

(74)

(75)

Admission control workflow

Resource request

Is admission blocked by Congestion Control?

Yes, then block

Check if the requested ASE UL + estimated ASE UL

> aseUlAdm aseUlAdm No Yes, then block

Check if the requested DL Pwr + estimated Pwr

> pwrAdm pwrAdm

No

Yes, then block

Check if the requested + estimated # compressed mode RL

> compModeAdm compModeAdm No Yes, then block

No, then

accept

Check if the requested ASE DL + estimated DL ASE

> aseDlAdm aseDlAdm No Yes, then block Yes, then block

Check if the requested code usage + estimated code usage

> dLCodeAdm dLCodeAdm No No Yes, then block

Check if the requested DL SF + estimated DL SF > sfXAdm sfXAdm * Only checked if BE-service requests •X = 8 or X = 32 •X = 16

75*

160*

240*

SF8adm= 8* SF8adm= 8* SF16adm= 16* SF16adm= 16* SF32adm= 32* SF32adm= 32*

70*

15*

* Current

default values

(76)

Soft Congestion mechanism

New request for ng 64/128, ng 64/64 or g access

Admission Control blocks the new request

An existing ng user of

An existing ng user of 64/384 will be switched down to 64/128

64/384 will be switched down to 64/128

or an existing ng

(77)

Spreading Factor (SF) limits

used in Admission Control

8*

16*

32*

(78)

ASE release order

Core Network

SRNC &

DRNC

Iu

Iur

over Iur:

SRNC

Iu

over Iu:

1.

1. Non-guaranteed service

Non-guaranteed

service

class connections

3.

3. CS/streaming service

CS/streaming

service

class connections

5.

5. Speech users

Speech

users

2.

2. Non-guaranteed

Non-guaranteed service

service

class connections

4.

4. CS

CS /streaming

/streaming service

service

class connections

6.

(79)

(80)

HSDPA Parameter Summary

Parameter Name

Parameter Name Default ValueDefault Value Initial Setting TELKOMSELInitial Setting TELKOMSEL

HSPATHLOSSTHRESHOLD 170 170

CQIERRORSABSENT 10 10

HSPOWERMARGIN 2 2

HSSCCHMAXCODEPOWER -20 -20

QUEUESELECTALGORITHM ROUND_ROBIN ROUND_ROBIN

SUPPORTOF16QAM FALSE TRUE

MAXHSRATE 15 30

HSONLYBESTCELL 1 1

HSHYSTERESIS1D 10 10

HSQUALITYESTIMATE CPICH_RSCP CPICH_RSCP

(81)

MAXHSRATE

 The HSDPA Iub flow control algorithm adjusts the available bit rate over Iub based mainly on the maximum possible air interface bitrate received from the scheduler, the number of users in a cell and Iub congestion indications. The RBS uses the parameter maxHsRate to determine the maximum

maximum bit rate to be used for HS-DSCH data frame traffic in one aggregated bit pipe over Iub.  The parameter maxHsRate should be configured for each RBS to represent the maximum MAC-d

PDU bitrate of HS-DSCH data frames, which is available for the AAL2 path or paths carrying HSDPA traffic to the RBS in question. The parameter may be set to a MAC-d PDU bit rate of 1.5 Mbps (the default value), when one dedicated physical E1 link is used for HSDPA traffic. This maximum bitrate level is the same as the bitrate expressed by the CAPACITY ALLOCATION control frames.

 As an example, the default value of this parameter has been obtained by multiplying the HSDPA available ATM bandwidth (excluding IMA overhead), e.g. 1.92 Mbps, with a factor of 0.79. This factor is dependent on the average number of MAC-d PDUs per HS-DSCH data frame. In this case, it is based on having 10 MAC-d PDUs (336 bits) per HS-DSCH data frame in average. It should be noted that assuming a lower number of PDUs per data frame gives a lower factor and vice versa.

 The parameter value of maxHsRate also depends on how the transport network is configured, e.g. if ATM VC Cross Connect is used or if AAL2 switching is used. It depends on how the ATM VCs etc are configured, e.g. for HS traffic only, sharing with AAL2 class A and B, several AAL2 paths for HS etc. Therefore it is recommended to follow the guidelines given by Ericsson regarding transport network dimensioning before setting a value for this parameter.

(82)

16QAM Modulation

 The RBS hardware supports both QPSK and 16QAM modulation. However, support of 16QAM is an optional feature which can be configured on cell level using the parameter supportOf16qam. The available modulation type impacts the maximum achievable bit rate in the cell,

Maximum Achievable User Bit Rate at the

3g-Radio-Parameter-Rev-01.pdf

3G Ericsson

Radio Parameter

TELKOMSEL

Contents



Idle Mode



Handover



Power Control



Capacity Management



Channel Switching



HSDPA

Idle Mode and Common Channel

behavior

Cell Selection 3G part

Criteria for Cell Selection

Squal > 0 , Squal = Qqualmeas-qQualMin

qQualMin (only for WCDMA cells) and

Srxlev > 0 , Srxlev = Qrxlevmeas-qRxLevMin

qRxLevMin - Pcompensation (for all cells)

Pcompensation = max (maxTxPowerUl

maxTxPowerUl - P, 0)

Qqualmeas > qQualMin

qQualMin

(-18dB)

(-18dB)

and

Qrxlevmeas > qRxLevMin

qRxLevMin

(-115dBm)

(-115dBm)

- max (maxTxPowerUl

maxTxPowerUl

(24dB)

(24dB)

- P, 0)

qQualMin :

qQualMin : indicates the minimum required quality value in the cell. It is sent in

system information, in SIB3 for the serving cell, and in SIB11 for adjacent cells

qRxLevMin :

qRxLevMin : indicates the minimum required signal strength in the cell. It is sent

in SIB3 for the serving cell and in SIB11 for adjacent cells

maxTxPowerUl :

maxTxPowerUl : indicates the maximum allowed transmission power when the

UE accesses the system on RACH. It is broadcast in SIB3

Cell Selection 3G part

Q

Q

(dB)

(CPICH E

/N

)

Q

Q

(dBm)

CPICH RSCP

qQualMin

qQualMin

((

–

18)

18)

qRxLevMin

qRxLevMin

((

–

115)

115)

Srxlev > 0

Srxlev > 0

Squal > 0

Squal > 0

suitabl

e

cell?