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Case study of WCDMA R99/HSPA

for planet v5.2

Peter Cheung

Technical Consultant,

Mentum HK

10 Aug 2010

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Summary

Set and configure soft launch site/sectors Define subscriber setting

equipment, service, subscriber type

Define environment

Create traffic map based on #sub or throughput demand Run Monte Carlo for R99 and HSDPA carriers

Analyze Monte Carlo results # served subscriber

Throughput per sector

Examine unserved subscriber reasons

Apply Monte Carlo cell load and re-run Network analysis CPICH pollution

Area coverage % of different bearer

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1a soft launch site/sectors group

Group Mongkok_ wcdma (green)

Each sector has carrier 1 and 3, both R99 + HSPA carriers

Activate carrier 1 as R99 ONLY

Activate carrier 3 as HSPA ONLY

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1b configure sectors for R99 carrier

Use max 472 OVSF for R99 only traffic for carrier 1,

with #R99 users = 100

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1c configure sectors for HSPA carrierUse max 472 OVSF for R99 only traffic for carrier 3 with

max # HS-DSCH codes=10 and max # HSPA user = 2

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2a setup R99 and HSPA bearerDefine R99 DL and UL bearer for required Eb/No at FER=xxx%

Define HSDPA DL bearer HS-DSCH Ec/Nt

Define HSUPA UL bearer E-DCH Ec/Nt

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2b setup equipment

Both HSPA equipment, where

WCDMA-R99 MS has ALL R99 bearer but no

HSDPA bearer

WCDMA-data-dongel has ALL R99 bearer +HSDPA bearer

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2c setup services2x CS services (12.2K voice and 64K data) with specified

individual loading and DL activity factor=50%

3x PS services (164K/128/384K data) with specified

individual loading and DL activity factor=100%

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2d setup subscriber typesR99 subscriber for outdoor usage for CS services with higher priority (1)

HSPA subscriber for indoor usage for PS services with lower priority (2)

10x scaling factor for BOTH

subscriber type to over-spread subscriber from traffic

map (i.e., to spread as many

subscriber as possible)

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3 setup environment Enter fast/slow fading margin

map default 4x planet clutter type to clutter names from map

e.g., disable some clutter, no indoor for water clutter

set clutter dependent DL orthogonal % (100% = no intra-cell interference, 0% = intra issame as inter-cell interference)

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4a Create traffic map

Tabulate site ID/sector ID/ # of

sub as an excel file (ie.. Traffic

target per sector)

Import excel file to planet

and map column

Import excel to operational data

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4b Create traffic map

Create CPICH

best server

Create traffic map with unit #sub/km2 and select

CPICH best server within mongkok area

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4c Create traffic map

assign different weight factor per clutter class

and generate traffic map

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5a Run Monte Carlo

Run MC for 2x subscriber type within

mongkok test area, and wait for MC run toconverge within 5%

Distribution of spread subscriber after MC

runs converged

after MC result is checked OK, apply cell

loading (i.e., write traffic power % and noise rise

back to sector config)

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5b Examine Monte Carlo results

Subscriber per sector/carrier examine block

reason and # served/unserved subscriber

compare unserved % with KPI

CDF of # served subscriber

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5b Examine Monte Carlo results

Global throughput MC report for

different service/environment

PDF of throughput

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5c Examine Monte Carlo results

Sort # served subscriber (from largest to

smallest) for 1 combination of carrier/subtype/service/environment

Create sector display scheme to

represent # served sub, apply to

sector on map windows

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6a CPICH pollution at environment

xx and subscriber equipment xxCPICH pollution between cells (at low CPICH Ec/Io, where no dominant

CPICH presents), typically resolve by increasing antenna downtilt

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6b coverage % for different bearer

Create statistics report based on HS-DSCH max achievable data rate and with

Analysis area = mongkok_area

Classified grid = best server grc file

Traffic map = xxx

Step size of data rate = 32k, 64k, 128k, 384k, 1M, 2M, 3M as different ranges

Optional map input to add extra columns in statistics

report (e.g., best server grc, traffic map)

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6c coverage % for different bearer

e.g., top 10x sector with highest coverage area %

within polygon within 2M~3M data rate range

e.g., area coverage % for different bearer of HS-DSCH