lac coverage enhancement solutions
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8/10/2019 LAC Coverage Enhancement Solutions
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Version number on title master
Rural coverage enhancement
Sitapathy Chavali
15 Oct 2008
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8/10/2019 LAC Coverage Enhancement Solutions
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Confidentiality level on slide master
Version number on slide master
Corporate Technical Group
Rural coverage enhancement solutions
Rural coverage solutions
Antenna & TMB
solution
2 Port Antenna Combiner Bypassed
4 Port Antenna Combiner Bypassed
21 dBi High Gain Antenna
TMB (Tower Mounted Boosters)
Equipment type Flexi RRH site ( 2/2/2)
Software solutions
Antenna hopping
ICE ( upto 3/3/3)
SRC
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Rural coverage enhancement solutions
A. 2 Port Antenna Combiner Bypassed
Recommendations
Use of 2 Port Regular Antenna for Sector
up to 2 Trx in Combiner Bypass mode.
Pros
Gain of 3 dB in the Link Budget.
Enhanced Coverage footprint for Rural single Site towns.
Use 4 Port Antenna for More than 2 Trx Sector to keep
the Trx in Uncombined mode
To use in all rural
sites with 2 TRX
Tx1Tx2
2 Port Antenna (Combiner Bypass)
Standard BTS Configuration
2 Port Antenna with Combiner Bypass
3dB Gain
Path Loss
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Corporate Technical Group
Rural coverage enhancement solutions
Antenna sharing options Turvihal - TVL001
Pre Airtel RxLev ( Idle Mode)Pre Vodafone RxLev ( Idle Mode)
2.5 Kms rad
4.0 Kms rad
VF coverage is 40% of Airtel
GSM ht : VF 40 mts ; Airtel 41 Mts
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Rural coverage enhancement solutions
Post Vodafone RxLev ( Idle Mode) Post Airtel RxLev ( Idle Mode)
4.0 Kms rad
3.2Kms rad
Antenna sharing options Turvihal - TVL001
VF coverage increased to 64% of Airtel (from 40%)
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Rural coverage enhancement solutions
Antenna sharing options JawaleraJWL001
Pre Airtel RxLev ( Idle Mode)Pre Vodafone RxLev ( Idle Mode)
2.5Kms rad
3.5 Kms rad
VF coverage is 51% of AirtelGSM ht : VF 39 mts ; Airtel 48 Mts
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Corporate Technical Group
Rural coverage enhancement solutions
Post Vodafone RxLev ( Idle Mode) Post Airtel RxLev ( Idle Mode)
3.5Kms rad
3.2 Kms rad
Antenna sharing options JawaleraJWL001
VF coverage increased to 85% of Airtel (from 51%)
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Corporate Technical Group
Rural coverage enhancement solutions
C. 20dBi, 65High Gain Antenna
Recommendations
Use of 20dBi High Gain Antenna
with combiner bypass for 2 TRX sector
Pros
Gain of up to 6 dB in the Link Budget.
Enhanced Coverage footprint for Rural single Site towns.
To use in all rural sites
Tx1Tx2
20dBi, 65 High Gain Antenna
Make
Katherine
Andrew
Model No -1800 MHz
K742186
HBX-6517DS-VTM
Standard BTS Configuration
2 Port 20 dBi Gain Antenna
3dB Gain
Path Loss
6dB Gain
2 Port 20 dBi Gain Antenna with comb bypass
Under trials in AP & Kar
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Version number on slide master
Corporate Technical Group
Rural coverage enhancement solutions
F. ICE (Intelligent Coverage Enhancement)
Recommendations
Use ICE feature to enhance Capacity from2 Trx to 3trx without loss of Coverage.
Initial configuration with 2/2/2 combiner
bypassed.
Addition of 3RdTrx in sector with ICE.
Pros Gain of 3 dB in the Link Budget for BCCH
layer.
Capacity gain in TCH layer.
To use in all rural
sites up to 3 TRX
ICE Implementation
Standard BTS Configuration
With ICE implementation
3dB Gain for coverage Layer
Path Loss
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Corporate Technical Group
Rural coverage enhancement solutions
G. SRC (Smart Radio Concept)To use in all rural
sites & highway sites
Standard GSMterminal
Nokia UltraSiteEDGE BTS with
SRC
Downlink boosted by 5 dB*
High Gain MHAfor all RX feeders
Uplink signal receptionwith 4 antennas (4UD)
Transmission via two antennas (IDD)
Uplink enhanced by 5.5 dB*
Constructive combining of all4 received antenna signals
DL signal (data/voice)transmitted via twoTRXs using time delay
and phase turning
Standard BTS Configuration
With SRC + TMA
5dB Gain
Path Loss
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Corporate Technical GroupRural coverage enhancement solutions
E. Flexi Feederless Site
Recommendations
Use Feederless solution to avoid cable loss
Use to overcome complicated site Installations.
Pros
Gain of approx 3 dB in the Link Budget .based on cable length
avoided
To use in all rural
sites up to 2/2/2
System DC
Sector
Sector
Sector
Fiber optics link
Ethernet link
DC supply
Flexi Feederless
Standard BTS Configuration
With Flexi Feeder Less Site
2.5dB Gain
Path Loss
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