Huawei parameter strategy v1.4 1st dec

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential

Security Level:

Slide title :40-47pt

Slide subtitle :26-30pt

Color::white

Corporate Font :

FrutigerNext LT Medium

Font to be used by customers and

partners :

Arial

www.huawei.com

Huawei Parameter Strategy


www.huawei.com

Contents

Traffic Share Solution

Idle Mode & Call Control

Handover

2G/3G Interoperability

Power Control



• Recommended solutions for Traffic Balancing

I. In case of GSM900 and DCS1800 co-location, the GSM900 has strong signal strength but we can use the idle parameter setting and handover to control the traffic and achieve the balanced traffic between GSM900 and DCS1800

II. In case of 2G and 3G co-location, we can use the idle parameter setting and handover to control the traffic and achieve the balanced traffic between 2G and 3G

a. Set proper cell selection and reselection parametersb. Utilize proper cell layer settings and other handover parametersc. Control idle mode MS behavior, optimize handover settings to achieve proper

traffic load sharingd. other


Hierarchical strategy for GSM900 and GSM1800

The layer of GSM 1800 cell is higher than the layer of GSM 900 cell.

① In idle mode, the MS stay in the GSM 900 cell B by setting the cell selecting or cell reselecting parameters.

② When the DL signal level is good enough to reach the threshold, the MS is triggered the Layer HO to GSM 1800 cell B.

③-1 Because the moving of Ms, the UL/DL signal level become worse. When UL/DL RxLevel is lower than the threshold, the MS is triggered Edge HO to GSM 900 cell B.

③-2 In oder to avoiding congestion of GSM 1800 cell, the Load HO can be used to share some traffic to GSM 900 cell.

Cell B GSM 900

【 Inter-layer HO threshold 】 +64-【 Inter-layer HO hysteresis 】

【 Edge HO Threshold 】

Cell A GSM 1800

①Cell select/

cell reselect

②Layer HO

③Edge HO/Load HO

The MS in this zone are difficult to be triggered handover from GSM 1800 cell to GSM 900 cell.



• Strategy for 2G/3G Interoperability

For the areas covered by both the GSM network and the UMTS network,2G/3G interoperability can be performed to achieve traffic balance between the GSM and UMTS. I.Only suggest to active the cell reselection from 2G to 3G.II.Both cell reselection and handover are suggested from 3G to 2G.

①Cell reselection from 3G to 2G only when the UE leave 3G coverage.②UE will trigger cell reselection from 2G to 3G once it go back to 3G coverage.

2G Coverage

3G/2G Coverage

①

②



www.huawei.com

Contents



Handover


Power Control


Idle Mode

• Strategy: More subscribers stay in DCS in Idle mode

Layer Priority: ID=OD>MD>MG

GSM1800 GSM1800GSM1800

GSM900 Cell

Micro Cell

Layer 3

Layer 2

GSM 900 GSM 900 GSM 900

GSM1800

GSM1800 GSM1800

GSM1800

GSM1800 Cell

Layer 1In-Building Cell


• Parameter suggestedPARAMETER PROPOSED VALUES

Abbreviated Name Parameter Name MG MD ID OD

MAX TA(bit period(1 bit=0.55km))Actual distance between MS &

BTS62 33

2

Repeater site value

TBD

4

Repeater site value

TBD

RXLEV_ACCESS_MIN RxLevel Acces Min

Rural,5Suburban 5

Others 8(follow

existing value)

15 (follow existing value)

15 (follow existing value)

20

Radio Link Timeout (FR & EFR) RLT 32 28 36 28

Radio Link Timeout (AMR FR) AFRDSBLCNT 48 48 48 48

Layer of the Cell Layer of the Cell 3 2 1 1

Cell Priority Cell Priority 1 1 1 1

CRO Cell Reselection Offset 0 (0dB) 12 (24dB) 18(36dB) 15 (30dB)

TO Temporary Offset 0 (0dB) 0 (0dB) 4 (40dB) 4 (40dB)

PT Penalty Time 0 (20 second)0 (20

second)1 (40 second)0 (20 second)

CRH Cell Reselection Hysteresis 14 dB 14 dB 14 dB 14 dB

BS_AG_BLKS_RESNumber of CCCH blocks reserved for the AGCH

1 1 1 1

BS-PA-MFRAMSNumber of multi-frames in a cycle on the paging channel

2 Multiframe Period

2 Multiframe Period

2 Multiframe Period

2 Multiframe Period

FMSMAXOPCC MS_TXPWR_MAX_CCH 5 0 0 0



www.huawei.com

Contents



Handover


Power Control


Handover

• Huawei handover algorithm introduction

Emergency HO

MS Goes into New Dedicated Mode

MS Goes intoDedicated Mode

Measurement Report processing1

Handover Judgment2

Handover Implementation if necessary

3TA HO

Interference HO

Bad Quality HO

Load HO

Edge HO

Layer HO

PBGT HO

AMR HO

No DL MR HO

Penalty Processing

Ranking ProcessingNormal HO


HandoverTriggering

P/N

Serving Cell Neighboring Cell

P: Watch Time (s) (s)N: Valid Time (s)

RX_LEV Thr

Time

RX_Lev

• Edge Handover

UL/DL Edge HO is triggered when:Serving cell: Rxlev < Edge HO Threshold following P/N rulesNeighboring cells following P/N rules with:

16 bits values lower than serving cellDL_Rx_Lev(n)> DL_Rx_Lev(s)+[Inter-cell HO Hysteresis](s->n)

Candidate cell exists and available

Handover


• Layer Handover

Layer HO is triggered when:

Neighboring cells following P/N rules with:

16 bits values lower than serving cell

RX_LEV (n)>= [Inter-layer HO threshold] (n) + [Inter-layer HO hysteresis] (s->n)

Layer & level (n)<Layer & level (s)


Handover


• PBGT Handover

Serving Cell Neighboring Cell

HandoverTriggering

PBGT HO Threshold

Time

Path Loss (dB)

126dB 119dB

5

126-119=7dB>5dB

P/N

P: Watch Time N: Valid Time

PBGT HO is triggered when:

Path loss (s) – Path loss (n) > PBGT HO Margin (s->n) and 16bits(n) < 16bits (s) following P/N rules

Layer & level (n) = Layer & level (s)


Handover


• Parameter suggested

PARAMETER PROPOSED VALUES

Abbreviated Name Parameter Name MG MD ID OD

Edge HO UL RX_LEV Threshold Edge HO uplink RX Level threshold -98 dBm -94 dBm -94 dBm -94 dBm

Edge HO DL RX_LEV Threshold Edge HO downlink RX Level threshold -94 dBm -90 dBm -90 dBm -90 dBm

Inter-layer HO Threshold Inter-layer HO Threshold -75 dBm -85 dBm -85 dBm -85 dBm

Inter-layer HO Hysteresis Inter-layer HO Hysteresis 2dB 2dB 2dB 2dB

PBGTMARGIN PBGT HO Margin 68 68 68 68

DLQUALIMIT DL Qual. Threshold 60 60 60 60

ULQUALIMIT UL Qual. Threshold 55 55 55 55

TALIMIT TA Threshold 62 33 2 4

Handover


www.huawei.com

Contents



Handover


Power Control



Cell Reselection Flow(2G->3G)

StartStart

Inter-RAT Cell Reselection Enable=YesInter-RAT Cell Reselection Enable=Yes

Ec/No>FDD_Qmin &last more than 5sEc/No>FDD_Qmin &last more than 5s

1 .RSCP > RLA_C+ FDD_Q_offset 2. Ec/NO > FDD_Q_min – FDD_Qmin_Offset 3. RSCP > FDD_RSCP_MIN

Above conditions are met for five consecutive seconds

1 .RSCP > RLA_C+ FDD_Q_offset 2. Ec/NO > FDD_Q_min – FDD_Qmin_Offset 3. RSCP > FDD_RSCP_MIN

Above conditions are met for five consecutive seconds

RLA_C>level threshold for searching 3G cellRLA_C>level threshold for searching 3G cell

EndEnd




PARAMETERPROPOSED VALUES

Abbreviated Name Parameter Name

INTERRATOUTBSCHOEN Inter-RAT Out BSC Handover Enable No

INTERRATCELLRESELEN Inter-RAT Cell Reselection Enable Yes

INTERRATINBSCHOEN Inter-RAT In BSC Handover Enable Yes

CELLSELECTAFTERCALLREL Select 3G Cell After Call Release Yes

FDDQOFF FDD Q Offset 0 (always select a cell if

acceptable)FDDQMIN FDD Qmin 7 (-12 dB)

FDDQMINOFFSET FDD Qmin Offset 0 (0 dB)

FDDRSCPMIN FDD RSCP Min. -102 dBm

QI Qsearch I 7 (always)

QP QsearchP 7 (always)

QCI Qsearch C Initial Use_Qsearch_I

QSEARCHC Qsearch C 7 (always)


•2G to 3G handover only activate in some spots


PARAMETERPROPOSED VALUES

Abbreviated Name Parameter Name

INTERRATOUTBSCHOEN Inter-RAT Out BSC Handover Enable Yes

BET3GHOEN Better 3G Cell HO Allowed Yes

HOOPTSEL Inter-rat Ho Preference Pre_3G_Cell

HOPRETH2G HO Preference Threshold for 2G Cell -85 dBm

HORSCPTH3G RSCP Threshold for Better 3G Cell HO -75 dBm

HOECNOTH3G Ec/no Threshold for Better 3g Cell HO -7 dB

MINRSCPTHRES Min RSCP threshold -90 dBm

MINECNOTHRES Min Ec/No threshold - 9.5 dB

HOSTAT3G 3G Better Cell HO Watch Time 5 seconds

HODURT3G 3G Better Cell HO Valid Time 4 seconds

QCI Qsearch C Initial Use_Qsearch_I

QSEARCHC Qsearch C 7 (always)

FDDREP FDD REP QUANT

Dense Urban & Urban:Ec/No

Suburban & Rural:RSCP


www.huawei.com

Contents



Handover


Power Control


Power Control

• Huawei III Power Control

step1(k)= -1* (SF1*(ca_filtered(k)-STarget)+QF1*( qa_filtered(k)-QTarget)) step2(k)= -1* (SF2*(ca_filtered(k)- STarget)+QF2*( qa_filtered(k)-QTarget)) step(k)=max(step1(k) ， step2(k) )

SF1: Rx Level Adjust FactorQF1: Rx Qual Adjust FactorSF2: Rx Level Protect FactorQF2: Rx Qual Protect Factor

STarget =(SThrUp+ SThrDown)/2QTarget =(QThrUp+ QThrDown)/2

Step Calculation:


Power Control


Parameter Name (UL)PROPOSED

VALUES Parameter Name (DL)

PROPOSED VALUES

ULRexLevHighThred 18 (Rxlev > -92dBm) DLRexLevHighThred 25 (Rxlev > -85dBm)

ULRexLevLowThred 18 (Rxlev < -92dBm) DLRexLevLowthred 25 (Rxlev < -85dBm)

ULFSRexQualHighThred 16 (C/I >16dB) DLFSRexQualHighThred 16 (C/I >16dB)

ULFSRexQualLowThred 16 (C/I <16dB) DLFSRexQualLowThred 16 (C/I <16dB)

ULHSRexQualHighThred 18 (C/I >18dB) DLHSRexQualHighThred 18 (C/I >18dB)

ULHSRexQualLowThred 18 (C/I <18dB) DLHSRexQualLowThred 18 (C/I <18dB)

ULAFSRexQualHighThred 14 (C/I >14dB) DLAFSRexQualHighThred 14 (C/I >14dB)

ULAFSRexQualLowThred 14 (C/I <14dB) DLAFSRexQualLowThred 14 (C/I <14dB)

ULAHSRexQualHighThred 16 (C/I >16dB) DLAHSRexQualHighThred 16 (C/I >16dB)

ULAHSRexQualLowThred 16 (C/I <16dB) DLAHSRexQualLowThred 16 (C/I <16dB)

ULMAXDOWNSTEP 6 dB DLMAXDOWNSTEP 4 dB

ULMAXUPSTEP 8 dB DLMAXUPSTEP 8 dB

ULREXLEVADJFCTR 3 DLREXLEVADJFCTR 3

ULREXQUALADJFCTR 4 DLREXQUALADJFCTR 4

DLRXLEVPROTECTFACTOR 10 ULRXLEVPROTECTFACTOR 10

DLRXQUALPROTECTFACTOR 60 ULRXQUALPROTECTFACTOR 60

Thank youwww.huawei.com

Technology

Huawei parameter strategy v1.4 1st dec