fundamental inbuilding

Fundamental In-building

Prepared by : Mardianto ChandraDepartment : BSS Development

The Evolving Route to 3G Development of Mobile

Communication

TD-SCDMA

Structure of GSM System

ACEIR

BTS

OMC

MSC

VLR

HLR

BSC

BTS

BTS

BTS

BTS

BSC

BSS - Base StationSubsystem

NSS - Network Subsystem

NMS - Network Management SystemMS

AbisAir A

IWF

SC

PSPDN

PSTNISDN

Transcoder

Structure of WCDMA System

Differences Between WCDMA & GSM

• WCDMA is a self-interfering system One of radio network planning goals is to minimize self-interfering. Self-interfering Source: shared spectrum, no ideal frequency spreading code with self-

related and mutual-related features Symptom: power escalation, soft capacity, etc. Solution: power control, access control, load control and detailed planning

WCDMA Technology Features

Time

Codeword

CDMA self-interfering illustration Time

Frequency

Synchronize

Related output

WCDMA Network Planning Elements Power planning

Statically set the transmit power of the downlink

common control channel Determine the static coverage range of the cell Dynamically adjust the transmit power of the

dedicated channel

Scrambling planning: reduce inter-cell interference Reasonable hybrid service model

Different rates and quality requirements for uplink/downlink links of services shall be taken into account.

Accurate channel model Power and quality requirements for common control channels shall be taken

into account. Power and quality requirements of uplink/downlink dedicated channels for

different services shall be taken into account.


T

I I I

S

Keep S/I unchanged.

I I I

S

I I I

S

I

Add a user I

•Self-interfering and power control

S/I cannot meet the requirements, an extra needs to be added.

WCDMA Network Planning Features

Hybrid multi-service system – complex model

Soft capacity, soft blocking and soft handover – detailed access and control policy design

Capacity and coverage are closely related to interference – high emulation analysis difficulty

Power controlNear - far problem

Node B

Node Bdespreading

despreading

Multi-service Hybrid System

UMTS UDD: 384 kb/sRadius = 0.56R

UMTS LCD: 64 kb/sRadius = 0.73R

UMTS Voice: 12.2 kb/sRadius = 0.87R

UMTS Voice: 8 kb/sRadius = R




















Different services have

different rates, and their

coverage ranges and

capacities are different.

Different services have

different rates, and their

coverage ranges and

capacities are different.

Different proportions and

composition of hybrid service,

with different system capacities

Different proportions and

composition of hybrid service,

with different system capacities

Outline: A mobile station communicates with two base stations simultaneously with smooth handover.


Soft handover


Data + channel code + scrambling code for channel division

Downlink: Cells are divided by scrambling codes

Uplink: Users are divided by scrambling codes

1 + (256, 0) + primary scrambling code

Flag of cell coverage

Reference of channel estimation

Reference of demodulation

WCDMA channel features

Structure and function of pilot channel

Code Resource Planning

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31

SF = 4

SF = 8

SF = 16

SF = 32

SF = 4

SF = 8

SF = 16

SF = 32

Red represents allocated code words

Green represents blocked high-speed frequency spreading factor code words because low-speed frequency spreading factor code words are allocated

Blue represents blocked low-speed frequency spreading factor code words because high-speed frequency spreading factor code words are allocated

Orange represents code words optimally allocated according to the applied frequency spreading factor

Any one from three

results

Code resource allocation principle

Utilization: Code words blocked due to code allocation shall be reduced as much as possible.

Complexity: The quantity of code words allocated shall be reduced as much as possible.

RBS 6000 Ericsson

RBS 6201 & 6102 Ericsson

RBS 6201 ( 2G & 3G)RBS 6102 ( 2G & 3G)

RBS 6201 & 6102: menggunakan material yang sama untuk Module DU

& RU nya

RBS 6201 & 6102 Ericsson

6 Module RUW (3G) 1 Module DUW (3G)

2 Module DUG (2G) 6 Module RUS (2G)

1 DUW (3G) bisa support untuk 6 sector (6 RUW)Sedangkan

1 DUG (2G) hanya support 12 TRX atau 3 RUS

RBS 6601

MU 6601 (2G)

RU 6601 (2G & 3G)

RBS 6601

RBS 3900 Huawei

RBS 3900E (2G & 3G)

RBS 3900(2G&3G - indoor)

RBS 3900A(2G&3G - Outdoor)

RBS 3900 Huawei

RBS 3900(2G&3G -

indoor)

RBS 3900A(2G&3G - Outdoor)

RBS 3900A Huawei

Why We need Indoor Coverage??• Penetration loss

The penetration loss of buildings refers to the attenuation of radio waves when they pass through the outer structure of buildings. It equals the difference between field-strength medians in and out of a building.

It is related to the material and thickness of buildings.

PICO Work Flow

Capacity Dimensioning

Penentuan tingkat keramaian building (apakah itu tipe office,

mall, dsb) jadi kita bisa memperkirakan jumlah traffic

yang mungkin ada

Choice of antenna and RBS System

1. Pemilihan Type RBS (apakah indoor, outdoor atau wall mounted) sesuai dengan tempat yang ada

2. Pemilihan Type Antenna (Omni atau directional) disesuaikan dengan bentuk layout gedung (floor plan)

Choice of antenna and RBS System

RF Design

Tujuan dari RF design adalah coverage inbuilding dan ini semua berhubungan dengan link budget setiap antenna

RF Design

RF Design

Link Budget

RF Design

Contoh :Design dengan jumlah antenna yang sama, tetapi loss nya berbeda

Antenna Configuration

Jumlah Antenna, posisi & type antenna yang di design benar-benar tergantung dari layout atau floor plan gedung, tidak ada yang benar 2 baku

Antenna Configuration

Next work flow

Installasi DAS, dsb

CDD / CDR

Performance RBS & User Experience

Optim coverage indoor (bisa berkala)

Thank You

fundamental inbuilding

Documents

factor code words

code allocation

quantity of code words

allocated code wordsgreen

access control

blocked highspeed frequency

selfinterfering system

load control