WCDMA Layering Strategy_V1

WCDMA Layering & Traffic management

strategy

WCDMA Layering Strategy | Commercial in confidence | 2015-05-25 | Page 2

› Carrier Management Strategy› Traffic Management Strategy› Idle Mode Strategy› Dedicated Mode Strategy› Inter Frequency Load Sharing› Neighboring Strategy

Contents


The high level summary of proposed carrier management strategy:

Carrier management strategy3r

d Car

rier

2nd C

arri

er1s

t Ca

rrie

r R99 + HS

R99 + HS

R99 + HSCell Reserved

R99 + HS

HS Only

HS Only

R99 + HS/EUL

Cell Reserved

Random CampingScenario

Scenario 5 Scenario 6

Characteristics of proposed carrier strategy:

1. Equal idle mode, Equal capability HSPA in all Layers

2. Mix voice & data.

3. Keep data service user as long as in WCDMA

4. Continuous HSPA service in WBB area

5. Simple configuration and equal performance in all layer

R99 + HS/EUL

R99 + HS/EUL


› HS and EUL in all 3 carriers-W2100_Carrier1(F1) : R99+HS/EUL (hotype = gsm)-W2100_Carrier1(F2) : R99+HS/EUL (hotype = ifho)-W2100_Carrier1(F3) : R99+HS/EUL (hotype = ifho)

› 3G network prioritized over GSM A 3G capable UE shall remain in 3G network as long as possible. When there is no 3G coverage, the UE will be handed over or re-select to GSM network. This approach will allow the 3G user access to HSPA broadband services as much as possible.

› Limit Inter-Frequency and IRAT HandoverIt is recommended to limit the amount of Inter Frequency and IRAT Hard Handovers. The best KPI performance can be achieved when mobility is performed by soft/ softer handover, as there is no need for UE to enter compressed mode or perform hard handover

Traffic management strategy

Cell Reserved


› Random Camping :– Idle mode cell selection, based on best S-criteria.– Idle mode cell reselection between carriers (F1 ↔ F2, F2 ↔ F3,

and F1 ↔ F3) and between system (GSM ↔ F1 only)– Idle mode cell reselection WCDMA-WCDMA, no offset added for

each carrier.– Idle mode cell reselection WCDMA-GSM, priority on WCDMA,

added offset

IDLE MODE strategy

Cell Reselection

GSM

WCDMA-F1

WCDMA-F2

WCDMA-F3

RandomCamping


› Random Camping :

IDLE MODE MOBILITY

GSM GSMGSM GSM GSM GSM GSM

WCDMA-F1WCDMA-F1 WCDMA-F1 WCDMA-F1 WCDMA-F1

WCDMA-F2WCDMA-F2 WCDMA-F2 WCDMA-F2

WCDMA-F3WCDMA-F3

1

2

3

12

3

Idle User on GSM entering 3G coverage move to F1, F2 or F3

Cell reselection between WCDMA Carrier

Idle User on F1,F2 or F3; signal quality getting worse at coverage edge move to 2G

Idle User transition GSM - WCDMAIdle user transition between WCDMA carrier


Idle mode camping

W2100

W2100

GSM

Idle Mode

W2100->W2100 cell reselection as Qofffset2sn = -0dB and Qhyst2 = 2dB

Idle Mode

G2W cell reselection

FDDQMIN = -18 dBm

Idle Mode

WCDMA camping

WCDMA rscp = -115 dBm

EcNo=-18

Idle Mode W2100->2G cell reselectionQoffset1sn = 10dB,

Idle Mode

GSM measurement

W2100 RSCP = -115 dBm

W2100 Ec/No = -18 dB

Idle Mode

WCDMA Inter and Intra Frequencies.

WCDMA sIntersearch=21(8dB)

sIntrasearch=22(10dB)


Layering ParameterIdle Mode & IFLS


› Intra Frequency Handover (Soft/Softer HO) between neighbors with the same WCDMA carrier› IRAT HO F1, F2, and F3 to ColloSector 2G. No IRAT HO from 2G to WCDMA› Inter Frequency Handover (IFHO) At the WCDMA carrier coverage edge one way ColloSector F3 F2,

F3 F1, F2 F1

dedicated mode strategy

GSM GSMGSM GSM GSM GSM GSM

WCDMA-F1 WCDMA-F1WCDMA-F1 WCDMA-F1 WCDMA-F1 WCDMA-F1 WCDMA-F1


WCDMA-F3WCDMA-F3 WCDMA-F3

GSM PREFERRED

IFHO PREFERRED

IFHO PREFERRED

R99/HS/EUL

R99/HS/EUL

R99/HS/EUL

3G TO 2G IRAT HO (NO 2G TO 3G IRAT HO) IFHO SHO

GSM PREFERRED

GSM PREFERRED

GSM PREFERRED


INTER FREQUENCY LOAD SHARING HSDPA IFLS

WCDMA-F1 WCDMA-F1WCDMA-F1 WCDMA-F1 WCDMA-F1 WCDMA-F1 WCDMA-F1


WCDMA-F3WCDMA-F3 WCDMA-F3

R99/HS/EUL

R99/HS/EUL

R99/HS/EUL

IFLS (HS)

› IFLS can be performed between all three carriers› IFLS can only be performed between collocated cells


Layering ParameterDedicated Mode


› The recommendation is not to exceed 65 neighbor (Intra Frequency + Inter Frequency + GSM) relations per cell

– The goal : should not exceed 25 intra-frequency Neighbor definitions per each serving cell, recommended value = 20.

– The goal : should not exceed 20 inter frequency neighbor definitions per each serving cell, recommended value = 16 per carrier (i.e: in case of three carrier max. = 32)

– The goal : should not exceed 20 GSM neighbor definitions per each serving cell, recommended value = 16.

› Intra-Frequency Neighbor Relations (SHO)– All defined neighbors should be within first 3 tiers from the source cell– NO one way neighbors defined

› Inter-Frequency Neighbor Relations (IFHO)– Defined at WCDMA carrier coverage edge with one way relation F3 F2, F3 F1, and F2 F1– And co-sector relation for inner cells (continuous coverage F1/F2/F3)

Neighboring strategy (1)


› Inter-RAT Neighbor Relations (ISHO - 3G)– Co-sector neighbor GSM1800 relations has to be defined at F1, F2 and F3 cells

› Inter-RAT Neighbor Relations (ISHO - 2G) For Idle Mode Only– Neighbor relation has to be defined with F1, F2, and F3 co-located cells– 1st tier F1, F2, and F3 relation is defined if 2G site is stand alone site

› Coverage Relations (IFLS)– Coverage relations has to be defined between all co-located cells (F1, F2 and F3)– NO coverage relations with non co-located cells

Neighboring strategy (2)

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WCDMA Layering Strategy_V1