huawei parameter strategy v1.4- 1st dec

7/14/2019 Huawei Parameter Strategy V1.4- 1st Dec

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HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential

Security Level:

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Huawei Parameter Strategy


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Contents

Traffic Share Solution

Idle Mode & Call Control

Handover

2G/3G Interoperability

Power Control


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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 2Gand 3G

a. Set proper cell selection and reselection parameters

b. Utilize proper cell layer settings and other handover parameters

c. Control idle mode MS behavior, optimize handover settings to achieve proper

traffic load sharingd. other


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Hierarchical strategy for GSM900 and GSM1800

The layer of GSM 1800 cell is higher than

the layer of GSM 900 cell.

In idle mode, the MS stay in the GSM900 cell B by setting the cell selecting or

cell reselecting parameters.

When the DL signal level is goodenough to reach the threshold, the MS is

triggered the Layer HO to GSM 1800 cell

B.

-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.

-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 hysteresisEdge HO Threshold

Cell A

GSM 1800

The MS in this zone are

difficult to be triggered

handover from GSM

1800 cell to GSM 900

cell.



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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.

Cell reselection from 3G to 2G only when the UE leave 3G coverage.

UE will trigger cell reselection from 2G to 3G once it go back to 3G

coverage.

2G Coverage

3G/2G Coverage



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Contents


IdleMode & Call Control

Handover


Power Control


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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

GSM1800GSM1800

GSM1800

GSM1800

Cell

Layer 1

In-Building Cell


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Parameter suggested

PARAMETER PROPOSED VALUESAbbreviated 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,5

Suburban 5

Others 8

(follow existingvalue)

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 AGCH1 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



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Contents



Handover


Power Control


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Handover

Huawei handover algorithm introduction

Emergency HO

MS Goes into New

Dedicated Mode

MS Goes into

Dedicated Mode

Measurement Reportprocessing1

Handover Judgment2

Handover Implementation

if necessary3

TA 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


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HandoverTriggering

P/N

Serving Cell NeighboringCell

P: Watch Time(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 rules

Neighboring cells following P/N rules with:

16 bits values lower than serving cell

DL_Rx_Lev(n)> DL_Rx_Lev(s)+[Inter-cell HO Hysteresis](s->n)

Candidate cell exists and available

Handover


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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)


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PBGT Handover

Serving Cell Neighboring Cell

HandoverTriggering

PBGTHOThreshold

Time

Path Loss (dB)

126dB 119dB

5

126-

119=7dB>5dB

P/N

P: WatchTimeN: ValidTime

PBGT HO is triggered when:

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

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

Candidate cell exists and available

Handover


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Parameter suggested

PARAMETER PROPOSED VALUESAbbreviated 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


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Contents



Handover


Power Control


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Cell Reselection Flow(2G->3G)

Start

Inter-RAT Cell Reselection Enable=Yes

Ec/No>FDD_Qmin &last more than 5s

1 .RSCP > RLA_C+ FDD_Q_offset

2. Ec/NO > FDD_Q_minFDD_Qmin_Offset

3. RSCP > FDD_RSCP_MIN

Above conditions are met for five consecutive

seconds

RLA_C>level threshold for searching 3G cell

End


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Parameter suggested


PARAMETER PROPOSED VALUESAbbreviated Name Parameter NameINTERRATOUTBSCHOEN 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 Offset0 (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)


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2G to 3G handover only activate in some spots


PARAMETER PROPOSED VALUESAbbreviated Name Parameter NameINTERRATOUTBSCHOEN 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


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Contents



Handover


Power Control


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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 Factor

QF1: Rx Qual Adjust Factor

SF2: Rx Level Protect Factor

QF2: Rx Qual Protect Factor

STarget =(SThrUp+ SThrDown)/2

QTarget =(QThrUp+ QThrDown)/2

Step Calculation:


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Power Control

Parameter suggested

Parameter Name UL) PROPOSED VALUES Parameter Name DL) PROPOSED VALUESULRexLevHighThred 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 18dB)

ULHSRexQualLowThred 18 (C/I 14dB)

ULAFSRexQualLowThred 14 (C/I 16dB)

ULAHSRexQualLowThred 16 (C/I


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huawei parameter strategy v1.4- 1st dec

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