15-zte urtan parameters introduction-92

ZTE URTAN Parameters introduction

ZTE University

Objectives

• At the end of this course, you will be able to:– Know the ZTE UTRAN features and functions– Master the key parameters of ZTE UTRAN

ZTE UTRAN HO key parameters

ZTE UTRAN re-selection key parameters

ZTE UTRAN PC key parameters

ZTE UTRAN other key parameters

Content

Basic concepts Active Set:

The set of cells connected with UE; User information is transmitted from these cells.

Monitor Set: Have configured neighbor cell relation with the cell in active set ;Signal is not strong enough to enter AS or AS already full Detect Set: Detected Set: A set of cells that are neither in the

active set nor in the monitor set Signal is weak; Monitor set is full; Cell has not

configured neighbor cell relation with the cell in active set.

Handover process Measurement control

Measured object （ Neighbor cell list ） Measured quantity （ RSCP/Ec/Io etc ） Measurement report method Event report Periodical report

Decision The RNC stores data of different cells according to the measurem

ent results. The RNC makes preliminary decision according to the event decisi

on method. e.g. When the event is reported and the target cell is acceptable, send

an active set update command to add/delete the cell into/from the active set.

Execution The RNC sends an active set update command to UE and UE star

ts handover.

Soft handover event

Event Description

1A Quality of target cell improves, entering a report range of relatively activating set quality

1B Quality of target cell decreases, depart from a report range of relatively activating set quality

1C The quality of a non-activated set cell is better than that of a certain activated set cell

1D Best cell generates change

1E Quality of target cell improves, better than an absolute threshold

1F Quality of target cell decreases, worse than an absolute threshold

Event 1A-Triggered Handover When the cell meets the conditions in the following Formula, the UE reports

Event 1A to the RNC

),2/(10)1(1010 111

aaBest

N

iiNewNew HRLogMWMLogWCIOLogM

A

R1a: Refers to the reporting range of Event 1A.

H1a: Refers to the reporting hysteresis of Event 1A MNew: Refers to measurement of the to-be-evaluated cell outside the active set

CIONew: Refers to offset of cell outside active set in relation to other cells

Mi: Refers to the mean value of other cells except the best cell in active set.

NA: Refers to the number of other cells except the best cell in active set

MBest: Refers to the measurement of the best cell in the active set.W: Refers to the weight proportion of the best cell to the rest cells in the active set in evaluation standards.

Event 1B-Triggered Handover When the cell meets the conditions in the following formula, the UE

reports Event 1B to the RNC.

R1b: Refers to the reporting range of Event 1B

H1b Refers to the reporting hysteresis of Event 1B

MOld: Refers to measurement of the to-be-evaluated cell in the active set.

CIOOld: Refers to offset of cell in active set in relation to other cells Mi: Refers to the mean value of other cells except the best cell in active set.

NA: Refers to the number of other cells except the best cell in active set

MBest: Refers to the measurement of the best cell in the active set.W: Refers to the weight proportion of the best cell to the rest cells in the active set in evaluation standards.

Event 1C-Triggered Handover When the cell meets the conditions in the following formula, the UE

reports Event 1C to the RNC.

H1c :Refers to the reporting hysteresis of Event 1C

MNew: Refers to measurement of the to-be-evaluated cell outside the active set

MInAS: Refers to the cell with poorest quality in the active set.

CIONew: Refers to offset of the to-be-evaluated cell outside the active set in relation to other cells CIOInAS: Refers to offset of cell with poorest quality in active set in relation to other cells

Event 1D-Triggered Handover When the cell meets the conditions in the following formula, the UE

reports Event 1D to the RNC.

MNotBest: Refers to the measurement of the to-be-evaluated cell within or outside the active set.

CIONotBest: Refers to the offset of the to-be-evaluated cell within the active set or outside the active set in relation to other cells.

CIOBest: Refers to offset of the to-be-evaluated cell in the active set in relation to other cells MBest: Refers to the measurement of the to-be-evaluated cell in the active set.

H1d: Refers to Event 1D report hysteresis

Example of soft handover

Key parameters

1.Soft Handover Method

Parameter name Soft Handover Method

Particular information of parameter Soft Handover Method

The range of value Periodical methodEvent method

Default value Event method

The location information in OMC-R UtranCell

Reference information No data

Key parameters

1.Reporting Range Constant for Event 1A/1B

Parameter name Reporting Range Constant for Event 1A/1B

Particular information of parameter

This parameter controls the triggering of event 1A/1B. 1A is easier but 1B is harder to trigger when this value increases; and vice verse.

The range of value (0..14.5)dB step 0.5dB

Default value

Multi configuration as follows[1A 1B]Periodical Report Parameters For CPICH Ec/No: [3 5]dB

Event Report Parameters For CPICH Ec/No: [3 5]dBPeriodical Report Parameters For CPICH RSCP:[6 8]dBEvent Report Parameters For CPICH RSCP:[6 8]dB

The location information in OMC-R RNC Radio Resource Management


Key parameters1.Reporting deactivation threshold for Event 1A

Parameter name Reporting deactivation threshold for Event 1A

Particular information of

parameter

In event 1a,it indicates the maximum number of cells allowed in the active set in order for event 1a to occur.

The range of value 0, 1, 2, 3, 4, 5, 6, 7

Default value 2

The location information in

OMC-RRNC Radio Resource Management


Key parameters1.Time to Trigger(for 1a/1b/1c/1d/1e/1f/1j)

Parameter name Time to Trigger(for 1a/1b/1c/1e/1f/1j)


It indicates the period of time during which the event condition has to be satisfied, used for event 1a/1b/1c/1e/1f.

The range of value (0, 10, 20, 40, 60, 80, 100, 120, 160, 200, 240, 320, 640, 1280, 2560, 5000)ms

Default value

Multi configuration as follows[1a 1b 1c 1d 1e 1f 1j] Periodical Report Parameters For CPICH Ec/No:[320 640 320 320 200 200 320]msEvent Report Parameters For CPICH Ec/No:[320 640 320 320 200 200 320]msPeriodical Report Parameters For CPICH RSCP:[200 200 200 200 200 200 200]msEvent Report Parameters For CPICH RSCP:[200 200 200 200 200 200 200]msDetect set parameters for CPICH Ec/Io 200msDetect set parameters for CPICH RSCP 200ms



Key parameters1.Hysteresis

Parameter name Hysteresis


It indicates the offset when the event condition has been satisfied, used for event 1a/1b/1c/1d/1e/1f. When this value increases, it harder to process those events; and vice verce.

The range of value (0..7.5)dB step 0.5dB

Default value

Multi configuration as follows[1a 1b 1c 1d 1e 1f 1j]Periodical Report Parameters For CPICH Ec/No:[0 0 4 4 2 2 4]dBEvent Report Parameters For CPICH Ec/No:[0 0 4 4 2 2 4]dBPeriodical Report Parameters For CPICH RSCP:[4 4 6 6 4 4 6]dBEvent Report Parameters For CPICH RSCP:[4 4 6 6 4 4 6] dBDetect set parameters for CPICH Ec/Io 2Detect set parameters for CPICH RSCP 6



Key parameters

Hard handover event

Event Description

2A Change of best frequency

2B

The estimated quality of a non-used frequency is above a certain threshold & the estimated quality of the currently used frequency is below a certain threshold

2C The estimated quality of a non-used frequency is above a certain threshold

2D The estimated quality of the currently used frequency is below a certain threshold

2E The estimated quality of a non-used frequency is below a certain threshold

2F The estimated quality of the currently used frequency is above a certain threshold

Event 2A formula

QNotBest: Refers to the measurement result of current non-best carrier frequency.QBest : Refers to the measurement result of current best carrier frequency.H2a : Refers to handover decision hysteresis parameter of Event 2A.

Event 2D formula

QUsed: Refers to the measurement result of current working carrier frequency.

TUsed 2d: Refers to the absolute threshold of poor quality of working carrier frequency in Event 2D decision.

H2d: Refers to handover decision hysteresis parameter of Event 2D.

Event 2F formula

QUsed: Refers to the measurement result of current working carrier frequency.

TUsed 2f: Refers to the absolute threshold of poor quality of working carrier frequency in Event 2F decision.

H2f: Refers to handover decision hysteresis parameter of Event 2F.

Key parameters1.Inter- frequency Handover Tactic

Parameter name Inter- frequence Handover Tactic


parameterInter- frequence Handover Tactic

The range of value

Algorithm Deciding2A Event Trigger2B Event Trigger2C Event Trigger

Default value 2A


OMC-RUtranCell


Key parameters1.Absolute Threshold for 2b/2d/2f with Carrier Frequency Threshold used frequencyParameter

name Absolute Threshold for 2b/2d/2f with Carrier Frequency Threshold used frequency


parameterIt indicates the absolute threshold of event 2b/2d/2f for used frequency.

The range of value

CPICH RSCP: (-115..-25 )dBmCPICH Ec/No: (-24..0) dB

Default value

Multi configuration as follows:[2b 2d 2f]UTRAN Inter-Freq Measurement periodical report Configuration Number For CPICH EcN0: [-13 -6 -5 ]dBUE Intra-Freq Event Measurement Configuration Number For CPICH EcN0:[-13 -13 -5]dBUTRAN Inter-Freq Measurement periodical report Configuration Number For RSCP UE:[-95 -95 -70]dBm Intra-Freq Event Measurement Configuration Number For RSCP:[-95 -95 -70]dBm





Parameter name HysteresisParticular information

of parameterIt indicates the offset when the event condition has been satisfied, used for event 2a/2b/ 2c/2d/ 2e/2f.

The range of value (0, 0.5..14.5)dB step 0.5dB

Default value

Multi configuration as follows [2a 2b 2c 2d 2e 2f]UTRAN Inter-Freq Measurement periodical report Configuration Number For CPICH EcN0: [6 4 4 1 4 1]dBUE Intra-Freq Event Measurement Configuration Number For CPICH EcN0:[4 4 4 4 4 4 ]dBUTRAN Inter-Freq periodical report Measurement Configuration Number For RSCP UE:[4 4 4 4 4 4 ]dB Intra-Freq Event Measurement Configuration Number For RSCP:[4 4 4 4 4 4 ]dB



Key parameters1.Time to Trigger

Parameter name Time to Trigger


parameterIt indicates the period of time during which the event condition has to be satisfied.

The range of value

(0, 10, 20, 40, 60, 80, 100, 120, 160, 200, 240, 320, 640, 1280, 2560, 5000)ms

Default value

Multi configuration as follows [2a 2b 2c 2d 2e 2f]UTRAN Inter-Freq periodical report Measurement Configuration Number For CPICH EcN0: [100 100 100 640 100 640]msUE Intra-Freq Event Measurement Configuration Number For CPICH EcN0:[100 100 100 640 100 640]ms UTRAN Inter-Freq periodical report Measurement Configuration Number For RSCP UE:[100 100 100 640 100 640]ms Intra-Freq Event Measurement Configuration Number For RSCP:[100 100 100 640 100 640]ms




Inter-RAT HO

Event Description

3A

the quality of the UTRAN carrier currently in use is lower than while the assessed quality of other systems is higher than the predefined threshold

3B The estimated quality of other system is below a certain threshold

3C The estimated quality of other system is above a certain threshold

3D The best cell of other system update

Event 3A formula

QUsed ： Signal quality of the working systemTUsed ： Threshold of the working systemMOther RAT ： Signal quality of other systemCIOOther RAT ： Cell individual offset of other systemT Other RAT ： Threshold of other systemH3a ： hysteresis of 3A event

Key parameters1.Inter-Rat Handover Tactic

Parameter name Inter-Rat Handover Tactic


parameterInter-Rat Handover Tactic

The range of value

Algorithm Deciding3A Event Trigger3C Event Trigger

Default value 3A Event Trigger


OMC-RUtranCell


Key parameters1.UTRAN Absolute Threshold for 3a

Parameter name UTRAN Absolute Threshold for 3a


In event 3a, it indicates the absolute threshold for UTRAN own system.

The range of value CPICH RSCP: (-115..-25 )dBmCPICH Ec/No: (-24..0) dB

Default value Multi configuration as followsUTRAN periodical Report Parameters For Own System CPICH Ec/No: -6dBUE Event Report Parameters For Own System CPICH Ec/No:-6dBUTRAN periodical report Parameters For Own System CPICH RSCP:-95dBmUE Event Report Parameters For Own System CPICH RSCP:-95dBm



Key parameters1.Other RAT Absolute Threshold for 3a/3b/3c

Parameter name Other RAT Absolute Threshold for 3a/3b/3cParticular

information of parameter

In event 3a/3b/3c, it indicates the absolute threshold for other system

The range of value

CPICH RSCP: (-115..-25 )dBmCPICH Ec/No: (-24..0) dB

Default value

Multi configuration as follows[3a 3b 3c]UTRAN periodical report Parameters For Own System CPICH Ec/No: [-90 -95 -95]dBmUE Event Report Parameters For Own System CPICH Ec/No: [-90 -95 -95]dBmUTRAN periodical report Parameters For Own System CPICH RSCP:[-90 -95 -95]dBmUE Event Report Parameters For Own System CPICH RSCP:[-90 -95 -95]dBm





Parameter name Hysteresis

Particular information of parameter It indicates the offset when the event condition has been satisfied.

The range of value (0, 0.5..14.5)dB step 0.5dB

Default value Mutli configuration as follows[3a 3b 3c 3d]UTRAN periodical report Parameters For Own System CPICH Ec/No: [4 4 2 4]dBUE Event Report Parameters For Own System CPICH Ec/No: [4 4 2 4]dBUTRAN periodical report Parameters For Own System CPICH RSCP:[4 4 4 4]dBUE Event Report Parameters For Own System CPICH RSCP:[4 4 4 4]dB



Key parameters1.Time to Trigger

Parameter name Time to Trigger


It indicates the period of time during which the event condition has to be satisfied.

The range of value (0, 10, 20, 40, 60, 80, 100, 120, 160, 200, 240, 320, 640, 1280, 2560, 5000)ms

Default value Mutli configuration as follows[3a 3b 3c 3d]UTRAN periodical report Parameters For Own System CPICH Ec/No: [100 100 100 100]msUE Event Report Parameters For Own System CPICH Ec/No: [100 100 100 100]msUTRAN periodical report Parameters For Own System CPICH RSCP:[100 100 100 100]msUE Event Report Parameters For Own System CPICH RSCP:[100 100 100 100]ms







Content

Cell-selection

for FDD cells: Srxlev > 0 AND Squal > 0

for TDD cells: Srxlev > 0

Squal = Qqualmeas – Qqualmin

Srxlev = Qrxlevmeas - Qrxlevmin - Pcompensation

Pcompensation = max(UE_TXPWR_MAX_RACH – P_MAX, 0)

When cell selection, UE will select the cell with the highest S value.

Measurement rules for cell-reselection 1. Sx > Sintrasearch ， UE do not perform intra-frequency measurements. Sx <= Sintrasearch ， UE perform intra-frequency measurement. Sintrasearch is not sent for serving cell ， Perform intra-frequency measurement.

2. Sx > Sintersearch ， UE do not perform inter-frequency measurements Sx <= Sintersearch ， UE perform inter-frequency measurements Sintersearch is not sent for serving cell ， Perform inter-frequency measurement.

3. Sx > SsearchRATm ， UE do not perform measurements on cells of RAT “m” Sx <= SsearchRATm ， Perform measurements on cells of RAT “m” SsearchRATm is not sent for serving cell ， Perform measurements on cells of RAT “m”

Hereinbefore the rules, Squal used o expressed Sx in FDD cells , Srxlev used to expressed Sx in TDD cells. Sx =RSCP - Qrxlevmin> Sintrasearch or EC/IO - Qqualmin> Sintrasearch

Cell-reselection

Rs = Qmeas,s + Qhysts

Rn = Qmeas,n - Qoffsets,n - TOn * (1 – Ln)

TOn = TEMP_OFFSETn * W(PENALTY_TIMEn – Tn)

Ln = 0 if HCS_PRIOn = HCS_PRIOs

Ln = 1 if HCS_PRIOn <> HCS_PRIOs

W(x) = 0 for x < 0W(x) = 1 for x >= 0

Cell-reselection

41

•Rs ： Serving cell R value•Rn ： Adjacent cell R value•Qmeas ： Measured cell quality level ， Expressed by CPICH Ec/No or CPICH RSCP (FDD cells)•Qoffset1s,n ： Offset between to cells ， For FDD cells in case the quality measure for cell selection and cell- reselection is • set to CPICH RSCP.•Qoffset2s,n ： Offset between to cells ， For FDD cells in case the quality measure for cell selection and cell- reselection is • set to CPICH EC/IO.•Qhyst1s ： Hysteresis value ， For FDD cells in case the quality measure for cell selection and cell- reselection is • set to CPICH RSCP.•Qhyst2s ： Hysteresis value ， For FDD cells in case the quality measure for cell selection and cell- reselection is • set to CPICH RSCP.•Treselection ： Cell-reselection timer value.

UE will select all the cells which satisfy the S criteria condition, and queuing according to R criteria. If the candidate cell R value is always above the serving cell during a certain period( Defined by Treselection) ， and UE already stayed in the serving cell over 1s, UE will reselect to this candidate cell.

Rs = Qmeas,s + Qhysts

Rn = Qmeas,n - Qoffsets,n - TOn * (1 – Ln)

Key parameters

1.Cell selection and reselection quality measure

Parameter name Cell selection and reselection quality measure


parameter

The measurement quantity for cell selection and reselection.

The range of value

CPICH Ec/N0CPICH RSCP

Default value CPICH Ec/N0


OMC-RCell Selection and Reselection


Key parametersParameter Sintrasearch (Trigger threshold of intra-frequency cell reselect

ion )Reference

documents

TS 25.304

Description Sintransearch defines the trigger threshold of intra-frequency cell reselection. UE use this parameter to judge whether to perform intra-frequency cell measurement. (When HCS is not used)

Parameter level

Cell

Range (0..20 )dB Step 2dB

Default value 14dB

Recommend value

14dB

Configuration rules

The greater the value is, the more easy to trigger intra-frequency measurement.

The lower the value is, the more difficult to trigger intra-frequency measurement.

Notices SintraSearch valid just when SintraSearchPre setting to true.

Key parametersParameter Sintersearch (Trigger threshold of intra-frequency cell reselection )

Reference documents

TS 25.304

Description Sinternsearch defines the trigger threshold of inter-frequency cell reselection. UE use this parameter to judge whether to perform inter-frequency cell measurement. (When HCS is not used)

Parameter level

Cell


Default value 14dB

Recommend value

14dB

Configuration rules

The greater the value is ,the more easy to trigger inter-frequency measurement. The lower the value is, the more difficult to trigger inter-frequency measurement.

Notices SinterSearch valid just when SinterSearchPre setting to true.

Key parametersParameters Ssearch,RAT (Trigger threshold of cell reselection between differe

nt radio technique )

Reference documents

TS 25.304

Description Ssearch,RAT defines the trigger threshold of i cell reselection between different radio technique. UE use this parameter to judge whether to perform cell measurement for cell reselection between different radio technique.. (When HCS is not used.)

Level Cell


Default value 2dB

Recommend value

4dB

Configuration rules

The greater the value is ,the more easy to trigger cell measurement between different radio technique. The lower the value is, the more difficult to trigger cell measurement between different radio technique.

Notices SSearchRat valid just when OtherRATInfoPre setting to true.

Key parameters

1.Qqualmin

Parameter name Qqualmin


This parameter indicates minimum required quality level in the cell.

The range of value (-24..0)dB

Default value -18dB

The location information in OMC-R Cell Selection and Reselection


Key parameters

1.Qrxlevmin

Parameter name Qrxlevmin


parameter

This parameter indicates minimum required RX level in the cell.

The range of value (-115..-25)dBm Step2dBm

Default value -111dBm


OMC-RCell Selection and Reselection


Key parameters

1.Qhyst1s

Parameter name Qhyst1s


parameter

This parameter specifies the hysteresis value (Qhyst). It is used for FDD cells in case the quality measure for cell selection and re-selection is set to CPICH RSCP.

The range of value (0..40)dB Step2dB

Default value 2dB

The location information in OMC-

RCell Selection and Reselection


Key parameters

1.Qhyst2s

Parameter name Qhyst2s


parameter

This parameter specifies the hysteresis value (Qhyst). It is used for FDD cells if the quality measure for cell selection and re-selection is set to CPICH Ec/No.

The range of value (0..40)dB Step2dB

Default value 2dB

The location information in OMC-

RCell Selection and Reselection


Key parameters

1.Cell individual offset

Parameter name Cell individual offset


Cell individual offset used to calculate the cell quality

The range of value UtranCell:(-10..10)dB step 0.5 dB;GsmCell: (-50..50) dB step 1 dB

Default value 0dB

The location information in OMC-R

UtranCell; External Utran Cell; External Gsm Cell


Key parameters

1.penalty time in SIB11

Parameter name penalty time in SIB11


This specifies the time duration for which the TEMPORARY_OFFSETn is applied for a neighboring cell.

The range of value (Not Used,10, 20, 30, 40, 50, 60 )s

Default value 10s

The location information in OMC-R Neighboring Cell, Gsm Neighboring Cell


Key parameters

1.Temporary_offset1 in SIB11

Parameter name Temporary_offset1 in SIB11


parameter

This specifies the offset applied to the H and R criteria for a neighboring cell for the duration of PENALTY_TIMEn. It is used for TDD and GSM cells and for FDD cells in case the quality measure for cell selection and re-selection is set to CPICH RSCP.

The range of value (3, 6, 9, 12, 15, 18, 21, inf) dB

Default value 9dB


OMC-RNeighboring Cell


Key parameters

1.Temporary_offset2 in SIB11

Parameter name Temporary_offset2 in SIB11


This specifies the offset applied to the H and R criteria for a neighboring cell for the duration of PENALTY_TIMEn. It is used for FDD cells in case the quality measure for cell selection and re-selection is set to CPICH Ec/No.

The range of value (2, 3, 4, 6, 8, 10, 12, inf)dB

Default value 10 dB

The location information in OMC-R Neighboring Cell






Content

Category of Power ControlOpen LoopMeasure the channel interference condition and adjust the initial transmitted power

Close Loop－ Inner LoopMeasure the SIR (Signaling to Interference Ratio), compare with the target SIR value, and then send power control instruction to UE.The frequency of WCDMA inner loop power control is 1500Hz.

If measured SIR>target SIR, decrease the UE transmitted power.If measured SIR <target SIR, increase the UE transmitted power.

Close Loop－ Outer LoopMeasure the BLER (Block Error Rate), and adjust the target SIR.The frequency of WCDMA outer loop power control is 10~100Hz.

If measured BLER<target BLER, decrease the target SIR value. If measured BLER>target BLER, increase the target SIR value.

Open Loop Power Control

General principals of open loop power control Open loop power control is applied to estimate the initial transmitte

d power for a new radio link. P-CPICH signal is used in Downlink Open Loop Power Control, whic

h is measured by UE to estimate the initial transmitted power. The following factors will also be considered, such as service QoS a

nd data rate, Eb/No requirements of establishing service, current downlink total Transmitted Power and interference from neighbor cell etc.

Uplink Open Loop Power Control - PRACH Purpose: Estimate the initial transmit power of physical channels such

as PRACH, DPCCH and DPDCH, and mainly refers to determining the PRACH transmit power.

PRACH Initial Transmit Power: Preamble_Initial_Power = Primary CPICH DL TX power – CPICH_RS

CP +UL interference + Constant Value - Primary CPICH DL TX power: transmit power of P-CPICH which is br

oadcasted in System information - CPICH_RSCP: the channel code power of CPICH measured by UE. - UL interference: uplink interference, which is measured by NodeB an

d updated in real time in SIB7. - Constant Value (ConstVal): related with the cell environment and the

service rate on PRACH, broadcasted system information If Preamble_Initial_Power > MaxRACHTxPwr, Preamble_Initial_Power

= MaxRACHTxPwr.

Uplink Open Loop Power Control - PRACH If no response (+1 or -1) of AICH is received after the first PRACH pre

amble composed, UE selects a new signature in the next timeslot. Increases the preamble transmit power by Power Ramp Step (PRStep

). The transmit power of the control part of PRACH message is: PRACH_C_Power = Preamble_Initial_Power+sum(PowerRampStep)

+Pp-m Pp-m(POPpm): power offset between the control channel and the

last PRACH preamble which is related to the PRACH message TFC.

Uplink Open Loop Power Control - DPCCH Uplink DPCH Open Loop Power Control mainly determine the i

nitial transmit power of DPCCH, and the gain factor c and d of the uplink DPCCH and DPDCH.

DPCCH_Initial_power = DPCCH_Power_offset - CPICH_RSCP

DPCCH_Power_offset = Eb/N0 + (NT+IT) – PG + CPICH_TX_Power

Eb/No: quality factor of the DPCCH PILOT domain (DpcchPilotEbN0).

NT+IT: uplink interference, measured by NodeB updated in SIB7.

PG: Processing Gain, which equals to the DPCCH Spreading Factor 256.

c and d are set fixed value according to the TFC.

Downlink Open Loop Power Control – Common Physical Channels

Downlink common physical channels transmit power and parameters:

AichPwrAICH

PichPwrPICH

MaxFachPwrFACHSCCPCH

PchPwrPCHSCCPCH

BchPwrP-CCPCH

PcpichPwrP-CPICH

SschPwrS-SCH

PschPwrP-SCH

Channel Parameter Default

-7dB(0.4w)

-7dB(0.4w)

-1dB(1.6w)

-3dB(1w)

-3dB(1w)

33dBm(2w)

-4dB(0.79w)

-3dB (1w)

4.5%

0.39%

0.5%

Activation Ratio

10%

10%

10%

10%

90%

100%

10%

10%

0.5%

0.8%

0.2%

0.2%

Downlink Open Loop Power Control – DPCH

totaltxcpichc

CPICHtxreq

b

inittx P

NEP

PG

NE

P ,

0

,0,

- PG: Processing Gain - Ptx,CPICH: P-CPICH transmit power - Ec-cpich/N0: CPICH Ec/N0(dB) reported by UE - α: Orthogonal Factor, 0.5 - Eb/No: Eb/No of the service configured corresponding to the current r

ate of the access service.

Because DPCH except data, also bear TFCI,TPC,PILOT information, so based on DPDCH power, add PO1,PO2,PO3 to express.

Close Loop – Inner Loop Power Control

Try to get the equal receiving Try to get the equal receiving Eb (Energy per bit) of each UEb (Energy per bit) of each UE at Node BE at Node B

NodeB UE

TPC instruction

Measure receiving SIR and compare to target SIR

Inner loop

Set SIRtar

1500Hz1500Hz

Each radio link has Each radio link has its own control its own control circlecircle

Close Loop – Inner Loop Power Control

General principals of inner loop power control The receiver compares the SIR value of received signal with t

arget SIR, and then sends back TPC instruction. According to the instruction, the sender will decide to increase/decrease the transmitted power.

The adjusted rang=TPC_cmd×TPC_STEP_SIZE Inner loop power control is required for the following channe

ls ： DPCH, PDSCH, PCPCH

Inner loop power control is not required for the following channels ： P-CPICH(S-CPICH), P-CCPCH(S-CCPCH), PRACH etc.

Close Loop – Outer Loop Power Control

NodeB UE

TPC instruction

Inner loop

Set SIRtar

Get data flow with Get data flow with stable BLERstable BLER

Measure BLER Measure BLER of TRCHof TRCH

Outer Loop

RNC

Measure receiving BLER and compare to

target BLER

Set BLERtar

10-100Hz

Measure receiving SIR and

compare to target SIR

Uplink Inner Loop Power Control The specification 25.214 defines two uplink inner loop power c

ontrol method which is configured by parameter UlIlPcAlg in OMCR.

Algorithm 1: the UE transmit power can be adjusted every timeslot, and transmit power can be increased or decreased.

Algorithm 2: UE transmit power is adjusted every five timeslots, and transmit power can be increased, decreased or not changed.

Current Parameters Configuration: Algorithm 1 tracks the fluctuating of channel better than Alg

orithm 2. According to the network deployment now (Feb, 2009), ther

e is no continuous coverage (no macro-diversity gain) and only one carrier (no load balancing), Algorithm 1 is recommended.

Downlink Inner Loop Power Control Two downlink inner loop power control method can be configure

d by parameter DPCMode in OMCR: Mode 1: UE sends a TPC command at each timeslot. The U

TRAN adjusts the transmit power at each timeslot according to the TPC command.

Mode 2: UE sends the same TPC command for three timeslots. The UTRAN adjusts the transmit power once every three timeslots according to the TPC command.

The step to adjust the downlink transmit power is configured by parameter TpcDlStep.

Current Parameters Configuration: Mode 1 tracks the fluctuating of channel better than Mode 2. According to the network deployment now (Feb, 2009), there

is no continuous coverage (no macro-diversity gain) and only one carrier (no load balancing), Mode1 is recommended.

Downlink Inner Loop Power Control

UTRAN adjusts the current downlink power P(k-1) to the new transmit power P(k) according to the following formula:

P(k) = P(k - 1) + PTPC(k) + Pbal(k)

PTPC(k): the kth power adjustment value; Pbal(k): correction value to balance the power of radio links.

Key parameters

1.Primary CPICH Power

Parameter name P-CPICH Power


parameterThe power of primary CPICH channel

The range of value (-10.0..50.0)dBm,step 0.1dBm

Default value 33dBm


OMC-RUtranCell


Key parameters

1.Primary SCH Power

Parameter name Primary SCH Power


parameterThe power of primary SCH channel

The range of value (-35..+15) dB step 0.1dB

Default value -3dB


OMC-RUtranCell


Key parameters

1.Secondary SCH Power

Parameter name Secondary SCH Power

Particular information of parameter The power of second SCH channel

The range of value (-35..+15) dB Step0.1dB

Default value -4dB



Key parameters

1.Max FACH Power

Parameter name Max FACH Power


parameter

The max FACH power,which beared on sccpch.

The range of value (-35..15)dB step 0.1 dB

Default value -1dB


OMC-RUtranCell


Key parameters

1.PICH Power

Parameter name PICH Power

Particular information of parameter The power of PICH channel

The range of value (-10..+5) dB,step 1 dB

Default value -7dB



Key parameters

1.AICH Power

Parameter name AICH Power


parameterThe power of AICH channel

The range of value (-22..5)dB,step 1

Default value -7dB


OMC-RUtranCell


Key parameters

1.Maximum allowed UL Power

Parameter name The maximum uplink power of the DPCH


parameterThe maximum uplink power of the DPCH

The range of value (-50..33)dBm step 1

Default value 33dBm




Key parameters

1.TPC uplink step size

Parameter name TPC step size


parameterTPC step size for the uplink

The range of value (1,2)dB

Default value 1dB




Key parameters

1.TPC DL Step Size

Parameter name TPC DL Step Size


parameterTPC step size for the downlink

The range of value (0.5, 1, 1.5, 2)dB

Default value 1dB




Key parameters

1.Uplink SIRtarget Up Step

Parameter name UL SIRtarget Up Step


parameterThe step of the SIR target up for uplink

The range of value (0.1..0.5) dB step 0.1dB

Default value 0.3dB




Key parameters

1.Uplink SIRtarget Down Step

Parameter name UL SIRtarget Down Step


parameter

The step of the SIR target down for uplink

The range of value (0.1..0.5) dB step 0.1dB

Default value 0.1dB




Power Control Parameters - DPCModeParameter name DPC Mode

Abbreviated name DPCMode

Description

This parameter indicates which Uplink inner loop power control algorithm is used. There are two kinks of uplink inner power control algorithm: single TPC and TPC triplet in soft. And which algorithm to be used should be configured to UE.

Range and Step

0: Single TPC1: TPC Triplet in Soft

Unit N/ADefault Value (note) 0: Single TPC

Power Control Parameters -DlIlPcAlg

Parameter name Downlink Inner Loop Power Control Algorithm

Abbreviated name DlIlPcAlg

Description

This parameter indicates which Downlink inner loop power control algorithm is used. For algorithm 1 inner loop power control is done every time slot. For algorithm 2 inner loop power control is done every 5 tim slots.

Range and Step1: Algorithm 12: Algorithm 2

Unit N/A

Default Value (note) 1: Algorithm 1





Content

Key parameters

1.T3212

Parameter name T3212


parameter

The T3212 is representation of the timeout value for periodic location area updating in decihours.

The range of value

(0,0.1..25.5)hours Step0.1hour0: No Periodic Updating

Default value 3hour




Key parameters

1.IMSI Attach and Detach Indicator

Parameter name IMSI Attach and Detach Indicator


This parameter indicates whether the attach and detach procedures are required to be used or not.

The range of value

UE shall not apply IMSI attach and detach procedure;UE shall apply IMSI attach and detach procedure

Default value UE shall apply IMSI attach and detach procedure



RACH procedure

UE decodes BCH to find out the available RACH sub-channels and their scrambling codes and signatures

It selects randomly one of the available sub-channels and signatures

The downlink power is measured and the initial RACH power level is set with a proper margin due to open loop inaccuracy

UE transmits 1 ms long preamble with the selected signature Node B replies by repeating the preamble using Acquisition Ind

ication Channel (AICH) UE decodes AICH message to see whether the NodeB has det

ected the preamble If AICH is not detected, the preamble is resend with 1 dB hi

gher transmit power If AICH is detected, a 10 or 20 ms long message part is tra

nsmitted with the same power as the last preamble

RACH procedure

Key parameters

1.PRACH Initiation Tx Power Correction value

Parameter name PRACH Initiation Tx Power correction value


parameter

This parameter is used to calculate the PRACH preamble initial TX power.

The range of value (-35..-10)dB

Default value -21dB


OMC-RUtranCell


Key parameters

1.PRACH Preamble Power Ramp Step

Parameter name PRACH Preamble Power Ramp Step


This parameter specifies the power step add on PRACH preamble TX power when no ack is received on AICH.

The range of value (1..8)dB

Default value 2dB



Key parameters

1.Max number of Preamble Transmit

Parameter name Max number of Preamble Transmitt


parameter

This parameter specifies the max number of preamble retrans before any ACK or NACK is received.

The range of value 1..64

Default value 20


OMC-RUtranCell


Paging

Key parameters

1.Number of Paging Indicators per PICH frame

Parameter name

Number of Paging Indicators per PICH frame


parameter

The number of paging indicators in one PICH frame.

The range of value 18,36,72,144

Default value 18


OMC-RUtranCell


Key parameters1.UTRAN DRX cycle length coefficient

Parameter name UTRAN DRX cycle length coefficient


In order to reduce power loss, UE in the Idle, Cell_Pch, Ura_Pch state will use discontinuous receiving method, the parameter is a constant used to calculate the paging occasion. Discontinuous receiving cycle 2k frame. If UE is in the Idle state and has carried out Attach process in the CS domain and PS domain, will select Min(CS domain DRX cycle length coefficient, PS domain DRX cycle length coefficient) to calculate the paging occasion . If UE only has carried out Attach process in one domain ,it will choice the attached CN domain specific DRX cycle length coefficient to calculate the paging occasion If UE in the Connected mode, the UE will choose Min(UTRAN DRX cycle length coefficient ,the attached CN domain specific DRX cycle length coefficient) to calculate the paging occasion.

The range of value 3...9

Default value 6



15-zte urtan parameters introduction-92

Documents