Download - IBS Kuwait
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Active Indoor SolutionTechnical Overview
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Agenda
RF Design overview
Active System overview
Success Stories
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The Challenge
Subscribers
Increasing demands on availablespectrum due to high traffic demand
High percentage of subscribersuse mobiles in-building.
Traditional optimisation tends toexclude those users
Higher quality RF inthe network required for differentiation
from competitors
Best
GSM
Network
Award
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The Requirements
The Requirement:Good In-Building Coverage with dedicated server.Cater to In-Building Capacity growth.
Optimal Cell-Site footprint. In-Building Coverage Solution:
Distributed Antenna System to allow optimalcoverage.
Active Repeater, BTS, or combination of bothbased upon capacity and coverage requirements.Objective is to providing good quality service toall calls with dedicated serving area.
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Proposed Targeted Buildings
Medium Buildings Larger Buildings
Type of Building Residential and Offices Malls, Airports
Expected # Subs 400 25000
GSM Rooms Required 1 6
Antennas Per floor 10
# of floors 20
Total # of antennas in building 200 800
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Passive Vs. Active
Passive Active
Smaller Buildings Larger Buildings
Residential, Offices Commercial
Smaller areas to cover Larger areas to cover
Less Traffic High Traffic (Possibility to increase )
Less Equipment Space required More Equipment Space required
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Medium sized Solution
Distributed Antenna Systemfor RF Distribution.
All services in DAS (2G,
2.5G, 3G).Flexible radio networkinterface.
Easy to install and maintain.
Infrastructure cost optimal.
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Possible Solutions Large Bldgs
All services in one single pairof fibers.
More than 20 km optical linkdistance from BTS hotel.Flexible radio network interface.
Centralized system managementpossible.
Easy to install and maintain.Infrastructure cost optimization.
Distributing all serviceswith one single system!2G, 2.5G, 3G, Wi-Fi
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Active Solution Added Value
Multi-band with the possibility to integrateFuture technologies( WiFi, WiMax).Multi-Operator system.High configuration along with high power.Remote location of BTS hotel in Commercialbuildings.
Centralized system management possible.
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Active Solution Added Value
Easy to install and maintain.Better utilization of equipment byutilizing less rooms.Infrastructure cost optimization.Leading operator can have higher
capacity while having the same power.
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Main Entities of the Active Solution
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Ion- M System
Considered as the high power opticalsystem.
Support the 3 bands (900, 1800, UMTS)with the possibility to add the futuretechnologies to same fiber system.
Uplink and Downlink are carried
within the same fiber link; thus onesingle mode fiber link is requiredbetween RU and OTRX.
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Planning Guidelines for an ActiveSolution
Cell Division based on the distribution of traffic and toprovide the best reuse pattern.
Link budget and Received power calculation
according to the final expansion plan.To consider the noise introduced from the activesystem and adjust the parameters of the BTSs toaccommodate the additional noise.
To consider the maximum fiber length of each link notto exceed around 20 km (point to point).
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Noise Rise Introduced (Ion-M)
Any active system introduce noise into the receiver.Each RU produce noise to the BTS, thus the limitationof having a maximum of 16 RUs/ per cell.Based on the introduced noise the sensitivity of theBTS reduces.Parameters needs to be adjusted to overcome theadded noise to the system:
2 G : Power Window to be increased.3 G : The cell capacity limited based on noise rise to beincreased.
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Noise Rise Introduced (Ion-M)
900 1800 UMTSThermal Noise -174 -174 -174Band Width 200 200 3800Thermal Noise within BandWidth -120.9897 -120.99 -108.202Required S/N (Ec/No) 9 9 -10O/P Power from BTS 43 43 43
O/P Power from RU 24 27 34Delta DL vs UL (higher UL) 15 8.5 3 Active System Gain -4 -7.5 -6Number of RUs 16 16 16NF of RUs 6 6 6NF of BTS 4 4 3Noise at the BTS(no active system connected) -116.9897 -116.99 -105.202
Noise Introduced by all RUs -106.9485002 -110.449 -96.161Noise at the BTS (Active system connected) -106.5383027 -109.579 -95.6506Sensitivity of System (no active system connected) -107.9897 -107.99 -115.202Sensitivity of System (active system connected) -97.5383027 -100.579 -105.651
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Master Unit Configuration
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MU Parts Planning
The MU part planning is basedon the requirements of theindoor solution:
The number of RUs connected per
cell (Maximum 16 RUs )The number of RUs connected toone OTRX (Max 4 RUs/per OTRXand each RU should be set towork on a different wave length)The number of operatorsconnected to the active system(default set to 4 operators).The number of cells per MU.
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MU Parts Planning (Example of 3Cells MU )
Part name Total num DescriptionION-M Master Unit 1 Connectors, cables,screws.etcOTRx 9/18/21 MU 12 Optical transciever Optical coupler 4-way E2000 1310+1550 12 To connect up to 4 RUs per OTRXSubrack 2 OTRx 6 Subrack to contain up to 2 OTRXsDpx passive 880-915 925-960 12Dpx passive 1710-1785 1805-1880 12Dpx passive 1920-1980 2110-2170 12Combiner 4-way 806-960 0-10dB 12Combiner 4-way 1710-1990 0-10dB 12Combiner 4-way 1920-2170 0-10dB 12
Splitter 1HU 2x8-way 806-960 1700-2170 9
To split RF inputs from each cabinet tofeed 4 OTRX (max per cell to feed 16RUs)
Subrack 4 PSU AC 3HU 1 Subrack to contain up to 4 PSUsPower Supply Unit AC IN 115/230V 4 PSU capable of providing 150 WattsRMC Multi-User with Modem GSM 9/18 1 Controller of the MU
Display & Keyboard drawer, 3HU 1interface to into MU controller toreconfigure, monitoring,.etc
Rack Alarm Board 1 provide alarms of the PSUs and FansSystem Alarm Board 1 For external alarmsFan set 4 Fans MU roof mount 2 for cooling the MURack 19" B 38 HU 2 Cage to contain the above
Duplexer per band to each OTRX to splitUL and DL
To combine four operators/per band/ per OTRX
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OTRX (Optical Transceiver)
The optical transceiver atwhich transfer RF (900, 1800,UMTS) Signals into opticalsignal and vise versa (Fromthe BTS side)
It can support the 3 bands or
two or one based on therequirement of the serviceprovider.
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Optical Splitter
It is used to feed 4 RUs from one OTRX.It is used in a star connection at whichthe RUs will be having a relatively closedistance.The limitation for splitting the opticalsignal of the OTRX is to reduce thepossible distance between the OTRX andthe RUs (not a limitation for indoor use)
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RF Combiners (per Band)
The RF combiners are used inorder to provide the possibility ofcombining several operators intothe active system.For each OTRX, per band, acombiner is required.The default combiners used havefour inputs, thus support up to 4operators.Within the combiner, each inputwill be having a 10 dB variableattenuator to be used for theleveling of the OTRX.
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Input Power Protection (IPP) Option
It is a protection method toensure that if the inputs at theOTRX exceeds the limits (as setin the IPP), the IPP will introduceattenuation of 15 dB.The IPP is an option and comeswithin the RF combiner.
The IPP threshold value is set 1dB higher than specified input ofthe system.
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Duplexer Units
Each UL/DL combined RF path is connectedto a duplexer to isolate uplink from downlink.For each OTRX, a duplexer is required for each
band.It is located in the interior of the MU.
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Subrack Two OTRXs
This Subrack can support:2 OTRXs2 Optical Splitters.2 (900) RF combiners.2 (1800) RF combiners.2 (UMTS) RF combiners.System alarm board.
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RMC600 (MU controller)
It can support up to 248 RUs (Cascaded or point to point).It is located on the first master rack.It can be accessed via:
Optional monitor and keyboard.RS232
LAN interface.Automatic shutdown to prevent over temperature (70 C)Automatic reboot when temperature goes down to 40 CBattery Backup which can support system operation forapproximately 1.5 hours.
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Power Supply Section
It comprise of :Power Supply UnitsPower switches(Fuses)RAB (Rack Alarm Board)
Each PSU provide 150 Watts.The system operates on the n+1 redundancy (a backup incase of thefailure of one PSU )Based on n+1 redundancy, PSU can be replaced while the system isoperational.
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Auto-Leveling Function
The loss of the fiber is equalized with anauto-leveling function controlled by theRMC-600.
The auto leveling function ensure thatthe DL as well as UL (optical signal) atboth sides (MU and RU) will be thesame.A maximum of 10 dB optical loss isallowed.
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Fiber Connection Link budget
An optical link has amaximum loss at whichif it exceeds the signalreceived will bedistorted (A maximumloss of 10 dB is set)Wave Length of thefiber connection:
UL=1550nmDL=1310nm
Quantity Loss(dB)Splicing 2 0.2Connectors 4 0.6Fiber length(Km) 20 7.2
Total Losses 8
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Leveling RF Inputs at the MU Side
An operational composite input level (for each band) at theOTRX MU side needs to be set to ensure the maximumcomposite power out of the RU.
# carriers 900 1800 UMTS1(Composite Power) 13.5 9.5 9.52 10.5 6.5 6.54 7.5 3.5 3.58 4.5 0.5
16 1.5 -2.5
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Leveling RF Inputs at the MU Side
The leveling of the OTRX is based on thefollowing Diagram:
BTS/NodeBSector 1Operator 1GSM900
Combiningsection
Termination load
Dir Coupler
8 way s plitter 4 way combiner
duplexer
OTRX
Reference point for leveling
variableattenuator (10 dB)
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Leveling RF Inputs at the MU Side
# carriers
Output Power After
Combining(per carrier)
Feeder loss 8 way splitter 4 way
combiner Duplexer
AchievedInput Power @ OTRX (per
carrier)without
includingCoupler +Variable
Attenuator
RequiredInput
Power @MU side
Coupler Reuired
Variableattenuator
900 6 35 2 10.5 10 2 10.5 1.5 6 31800 6 34 3 10.5 11 2 7.5 -2.5 10 0
UMTS 2 43 4 10.5 11.5 2 15 3.5 10 1.5900 16 32 2 10.5 10 2 7.5 1.5 6 01800 16 31 3 10.5 11 2 4.5 -2.5 6 1
UMTS 4 40 4 10.5 11.5 2 12 3.5 6 2.5
FutureEx
Initial
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Success Stories- LaunchedDubai Airport
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Success Stories- LaunchedDubai Airport
Dubai Airport
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Success Stories- DeploymentMall of Dubai
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Success Stories- DeploymentBurj Dubai
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Success Stories- DeploymentIndex Tower
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Thank you for listening.Please feel free to ask questions.