Challenges of Multi Band/Multi Technology Cellular ... · PDF fileXPol Panel 790–960MHz...
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Transcript of Challenges of Multi Band/Multi Technology Cellular ... · PDF fileXPol Panel 790–960MHz...
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Challenges of Multi Band/Multi Technology
Cellular installationKathrein/Deltronic – Telecom Infra Event, Rotterdam, 7th March 2018
07 March 2018
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Actively Shaping the Connected World
| Telecom Infra Event - Rotterdam, 07.03.2018 |
We solve the most
complex requirements
and challenges. We use this deep-rooted strength
to act as a driving force in
shaping the world of tomorrow,
where technologies converge.
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1. Trends in Mobile Communication Industry
| Telecom Infra Event - Rotterdam, 07.03.2018 |
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Data tsunami – the world is changing…
| Telecom Infra Event - Rotterdam, 07.03.2018 |
Papal Election 2005 Papal Election 2013
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Trends: Multi-Array / Multi-Band Antennas
Increased need for Multiband Antennas
Permission for additional sites in Europe
is hard to get
Operators normally have more than one license
Acceptance of new antennas on sites decreases
KATHREIN's Multiband
Antenna Portfolio for LTE
covers all bands
Compact design with high integration
independant Remote Electrical Tilt
Source: ABIResearch
| Telecom Infra Event - Rotterdam, 07.03.2018 |
Source: ABIResearch
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Network Vision 2022 – Urban Area
| Telecom Infra Event - Rotterdam, 07.03.2018 |
3D Coverage
xMIMO
D2D/Mesh Network
Street Connect/Densification
Broadcast via GEO SAT
BOSNET/
TETRA/
Project 25
Indoor Coverage
Connected Car/Car2X
Edge Computing FttC/DOCSIS 3.1/R-Phy
Inside Connect
Urban areas will serve
the most use cases with
the latest technologies
installed.
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2. Antenna Trends
| Telecom Infra Event - Rotterdam, 07.03.2018 |
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Antenna Complexity
Extended Lowband AISG Colour Code
XPol Panel 790–960MHz Lowband array
HISTORY
Limited number of available network opportunities
e.g. GSM 900…
900
Operator 1 GSM 900
| Telecom Infra Event - Rotterdam, 07.03.2018 |
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Antenna Complexity
PRESENT
Growing number of different frequency ranges for Mobile Communication Systems
e.g. GSM900 GSM1800 UMTS 2100 LTE 700 ….. 2600
| Telecom Infra Event - Rotterdam, 07.03.2018 |
Operator 1
1800
GSM
2100 2600
UMTS LTE
900800
LTE GSM /
UMTS
Demand: different bands in one antenna
Solution: create multi-band antennas with
different antenna arrays
LB Array
698/790 – 960 MHzHB Array
1710 – 2170 MHzRadomeHB Array UBB
1695 – 2690 MHz
700
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Antenna Complexity
Upgrades / Expansions
From 2RxDiv to 4RxDiv
From 2 x 2 MIMO to 4 x n MIMO 8 x n MIMO?
New licence – new requirements on site
698-960
1695-2690
790-960
1710-2170
Mulit-Array, Ultra-Broadband Kathrein Design = Superintegration
Future-proof roll-out
= no additional CAPEX and OPEX
Less wind load + weight = lower CAPEX
| Telecom Infra Event - Rotterdam, 07.03.2018 |
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Kathrein L-Band 14-Port Antenna
| Telecom Infra Event - Rotterdam, 07.03.2018 |
FlexRET
L-Band
4.3-10
698-862 880-960
1695-2180 2490-2690
2490-2690
1427-1518 1695-2180
80011878 1Q18
698-862 (R1) 880-960 (R2) 1695-2180
(B1)
2490-2690
(Y1)
1427-1518
(G1)
1695-2180
(B2)
2490-2690
(Y2)
16 dBi 16 dBi 17.5 dBi 17.5 dBi 17 dBi 17.5 dBi 18 dBi
65° 65° 65° 65° 65° 65° 65°
2°-12° T 2°-12° T 2.5°-12° T 2.5°-12° T 2.5°-12° T 2.5°-12° T
1999 / 378 / 164 mm
MIMO Correlation Table
698-862 880-960 1695-2180 2490-2690 1695-2180 2490-2690 1427-1518
2 x 2 x x x x x x x
4 x 4 x x x x
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What about PIM in a „Single Radome“ solution?
| Telecom Infra Event - Rotterdam, 07.03.2018 |
Lowband:
problem with filtered lowband solution, one must combine 700 and 800 possible PIM right away
also, filtered lowband means that all lowband carriers are combined after the diplexer Proposal: split up
lowbands in two columns OR don‘t use 800 MHz band!
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3. Network Quality
| Telecom Infra Event - Rotterdam, 07.03.2018 |
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Intermodulation distance of -150 dBc
| Telecom Infra Event - Rotterdam, 07.03.2018 |
diameter pinhead
Δ 150 dB = 1015
sun
earth
Distance earth to sun:
~150 Mio km
Diameter pinhead:
~1,5 mm
10 * distance earth to sun= 1015 = 150 dB
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What are the results of bad PIM performance?
Interference respectively SNR is dependent on PIM, tilt accuracy, HPBW, ……..
Low SNR end up in less data throughput
Intermodulation
| Telecom Infra Event - Rotterdam, 07.03.2018 |
[Source: Ericsson]
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CrossPolarRatio - CPR
Bad CPR bad receive diversity and MIMO
performance
Recommendation: 8-10 dB within sector [2]
| Telecom Infra Event - Rotterdam, 07.03.2018 |
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CPR
CrossPolarRatio directly influences the network performance
| Telecom Infra Event - Rotterdam, 07.03.2018 |
The higher the CPR,
the higher the Div-Gain
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Examples for IM causes
Antenna environment
| Telecom Infra Event - Rotterdam, 07.03.2018 |
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Challenges for the Future
Recognize trends
New Frequency usage, e.g. 3.5 GHz for LTE
Combination of TDD / FDD systems
Supplemental Downlink
5 G – Ultra High Frequencies?
Which frequency combinations in one radome?
Small Cell configurations
?
1695
… 2
700
…
3500
1350
-…
152
7
698
… 9
60
??
?
| Telecom Infra Event - Rotterdam, 07.03.2018 |
Super integrated 16
port passive plus
3.5GHz mMIMO
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Stay Connected
| Telecom Infra Event - Rotterdam, 07.03.2018 |
iSto
ck.c
om |
Ken
ishi
rotie
Thank you very much for your
attention!
Any questions?