Fundamental Inbuilding
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Transcript of Fundamental Inbuilding
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Fundamental In-building
Prepared by : Mardianto ChandraDepartment : BSS Development
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The Evolving Route to 3G Development of Mobile
Communication
TD-SCDMA
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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
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Structure of WCDMA System
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Differences Between WCDMA & GSM
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• 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
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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.
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WCDMA Technology Features
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.
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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
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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
UMTS LCD: 144 kb/sRadius = 0.60R
UMTS UDD: 64 kb/sRadius = 0.78R
UMTS UDD: 144 kb/sRadius = 0.64R
UMTS LCD: 384 kb/sRadius = 0.49R
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
UMTS LCD: 144 kb/sRadius = 0.60R
UMTS UDD: 64 kb/sRadius = 0.78R
UMTS UDD: 144 kb/sRadius = 0.64R
UMTS LCD: 384 kb/sRadius = 0.49R
UMTS LCD: 64 kb/sRadius = 0.73R
UMTS Voice: 12.2 kb/sRadius = 0.87R
UMTS Voice: 8 kb/sRadius = R
UMTS LCD: 144 kb/sRadius = 0.60R
UMTS UDD: 64 kb/sRadius = 0.78R
UMTS UDD: 144 kb/sRadius = 0.64R
UMTS LCD: 384 kb/sRadius = 0.49R
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
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Outline: A mobile station communicates with two base stations simultaneously with smooth handover.
WCDMA Technology Features
Soft handover
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WCDMA Technology Features
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
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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.
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RBS 6000 Ericsson
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RBS 6201 & 6102 Ericsson
RBS 6201 ( 2G & 3G)RBS 6102 ( 2G & 3G)
RBS 6201 & 6102: menggunakan material yang sama untuk Module DU
& RU nya
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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
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RBS 6601
MU 6601 (2G)
RU 6601 (2G & 3G)
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RBS 6601
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RBS 3900 Huawei
RBS 3900E (2G & 3G)
RBS 3900(2G&3G - indoor)
RBS 3900A(2G&3G - Outdoor)
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RBS 3900 Huawei
RBS 3900(2G&3G -
indoor)
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RBS 3900A(2G&3G - Outdoor)
RBS 3900A Huawei
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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.
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PICO Work Flow
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Capacity Dimensioning
Penentuan tingkat keramaian building (apakah itu tipe office,
mall, dsb) jadi kita bisa memperkirakan jumlah traffic
yang mungkin ada
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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)
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Choice of antenna and RBS System
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RF Design
Tujuan dari RF design adalah coverage inbuilding dan ini semua berhubungan dengan link budget setiap antenna
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RF Design
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RF Design
Link Budget
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RF Design
Link Budget
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RF Design
Contoh :Design dengan jumlah antenna yang sama, tetapi loss nya berbeda
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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
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Antenna Configuration
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Antenna Configuration
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Next work flow
Installasi DAS, dsb
CDD / CDR
Performance RBS & User Experience
Optim coverage indoor (bisa berkala)
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Thank You