Smart Antennas & Radio Network Planning “Challenges and Solutions for 3G“
Thomas Neubauer Vienna University of Technology Institut für Nachrichtentechnik und Hochfrequenztechnik www.nt.tuwien.ac.at/mobile
INSTITUT FÜR NACHRICHTENTECHNIK UND HOCHFREQUENZTECHNIK
Thomas Neubauer June 12, 2002
Outline
Motivation – Investor´s Perspective – Public Protests against Mobile Masts – Time Perspective
Smart Antenna Overview Smart Antenna Planning Challenges Planning Example Conclusions
INSTITUT FÜR NACHRICHTENTECHNIK UND HOCHFREQUENZTECHNIK
Slide 2
Thomas Neubauer June 12, 2002 7th LS Seminar Day
Investor´s Perspective License price per pop. in $US (Oct. 01) 70 6,
Others 32%
56
59
4,
20
Vodafone 14% Hutchison 12%
90 8,
NTT DoCoMo 11%
MobilCom 9%
Telefonica 7%
Deutsche Telekom 9%
00 0,
00 0,
50 3,
90 4,
5,
70
0 ,2 11
0 ,7 15
0 ,5 16
0 ,5 20
0 ,3 30
0 ,1 35
42
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0
0 ,8 60
or Si ea ng ap or e B el gi um A us tr al ia N or Sw w it z a y e N ew rlan Ze d al an d Sp a S w in ed en G re ec e Po rt ug al Fi nl an d Ja pa n
K
tr ia So
ut h
us
A
ol
la nd
ly Ita H
G
U K er m an y
86
,0
0
15
17
4,
20
British Telecom 6%
INSTITUT FÜR NACHRICHTENTECHNIK UND HOCHFREQUENZTECHNIK
Oct 2001
Slide 3
Thomas Neubauer June 12, 2002 7th LS Seminar Day
Public Protest against Mobile Masts Regulatory and Political Issues • RF exposure limitations, Salzburg: 1/10.000 of WHO limit • Abutting owner vetos against new masts • Prohibitions of new sites on public buildings Public Protest • Legal action against operators • Dramatic increase in site lease • Difficult to acquire new sites
STOP MOBILE MASTS!
Effects • Roll-out delay • High costs INSTITUT FÜR NACHRICHTENTECHNIK UND HOCHFREQUENZTECHNIK
Slide 4
Thomas Neubauer June 12, 2002 7th LS Seminar Day
Time Perspective
Radio Network roll-out ¾ ¾ ¾ ¾
New site acquisition License conditions – service coverage Investment in infrastructure Many additional sites for the future mobiledata market
Rapid adaptation to the customer needs ¾ Adapt to future market growth ¾ Adapt to new services and applications Smart SmartAntennas Antennasand andenhanced enhancedradio radionetwork network planning/optimization planning/optimizationreduce reducetime-to-market time-to-market INSTITUT FÜR NACHRICHTENTECHNIK UND HOCHFREQUENZTECHNIK
Slide 5
Thomas Neubauer June 12, 2002 7th LS Seminar Day
Outline
Motivation Smart Antenna Overview – How do they work? – Effects on the power budget – How do Smart Antennas enhance UMTS?
Smart Antenna Planning Challenges Planning Example Conclusions
INSTITUT FÜR NACHRICHTENTECHNIK UND HOCHFREQUENZTECHNIK
Slide 6
Thomas Neubauer June 12, 2002 7th LS Seminar Day
How do Smart Antennas work?
Conventional
Smart Antenna
¾¾Power Powerradiated radiatedin inthe theentire entire cell cell
¾¾Power Powerradiated radiatedin inthe thedesired desired directions directions
¾¾High Highinterference interference
¾¾Interference Interferencereduction reduction
¾¾High Highexposure exposure
¾¾Low Lowexposure exposure
INSTITUT FÜR NACHRICHTENTECHNIK UND HOCHFREQUENZTECHNIK
Slide 7
Thomas Neubauer June 12, 2002 7th LS Seminar Day
Effects of Smart Antennas on the power budget TX power
Propagation Loss
RX power
Total Interference
Eb/No
Considerable Considerable interference interference reduction reduction Reduction Reduction of of the the overall overall signal signal power! power! INSTITUT FÜR NACHRICHTENTECHNIK UND HOCHFREQUENZTECHNIK
Slide 8
Thomas Neubauer June 12, 2002 7th LS Seminar Day
How do Smart Antennas enhance UMTS?
Coverage
DOWNLINK DOWNLINK
Service Coverage improvement
UL Coverage limited
UPLINK Capacity improvement
DL Capacity limited
System Throughput [bit/s/cell] INSTITUT FÜR NACHRICHTENTECHNIK UND HOCHFREQUENZTECHNIK
Slide 9
Thomas Neubauer June 12, 2002 7th LS Seminar Day
Outline
Motivation Smart Antenna Overview Smart Antenna Planning Challenges – Channel Models – Interference Considerations – Space-Time Receivers
Planning Example Conclusions
INSTITUT FÜR NACHRICHTENTECHNIK UND HOCHFREQUENZTECHNIK
Slide 10
Thomas Neubauer June 12, 2002 7th LS Seminar Day
Channel Models
Terrain data-base ⇒ pathloss ⇒ mean delay ⇒ delay spread Angular domain?
Smart Smart Antenna Antenna deployment deployment requires requires spatio-temporal spatio-temporal channel channel models! models! INSTITUT FÜR NACHRICHTENTECHNIK UND HOCHFREQUENZTECHNIK
Slide 11
Thomas Neubauer June 12, 2002 7th LS Seminar Day
Smart Antenna Interference Situation - Uplink
INTER-cell Interference INTRA-cell Interference SIGNAL INSTITUT FÜR NACHRICHTENTECHNIK UND HOCHFREQUENZTECHNIK
Total Total received received uplink uplink power power Slide 12
Thomas Neubauer June 12, 2002 7th LS Seminar Day
Smart Antenna Interference Situation - Downlink
INTER-cell Interference INTRA-cell Interference SIGNAL PILOT INSTITUT FÜR NACHRICHTENTECHNIK UND HOCHFREQUENZTECHNIK
Total Total received received downlink downlink power power Slide 13
Thomas Neubauer June 12, 2002 7th LS Seminar Day
Smart Antenna Receiver Structures
CDF
Space-Time
Beam-Pointing Switched Beam Gain
Base Base station station signal signal processing processing has has to to be be considered considered for for radio radio network network planning! planning! INSTITUT FÜR NACHRICHTENTECHNIK UND HOCHFREQUENZTECHNIK
Slide 14
Thomas Neubauer June 12, 2002 7th LS Seminar Day
Outline
Motivation Smart Antenna Overview Smart Antenna Planning Challenges Planning Example – UMTS Roll-out scenario – Partial Smart Antenna deployment – Capacity increase
Conclusions
INSTITUT FÜR NACHRICHTENTECHNIK UND HOCHFREQUENZTECHNIK
Slide 15
Thomas Neubauer June 12, 2002 7th LS Seminar Day
Smart Antenna Radio Network Planning Example City of Vienna, Austria City of VIENNA, Austria • 144 cells / 72 “smart” cells • Urban propagation model • Background noise floor of -105dBm • DOA with 8° rms angular spread • 1 Antenna (65° Sector) • 4 Element ULA • d=λ/2 inter-element spacing • Service mix: speech, 64k, 144k • UL processing: seq.-space-time - spatial processing: opt. comb. - temp. processing: MRC • DL processing: beamforming - UL AoA
INSTITUT FÜR NACHRICHTENTECHNIK UND HOCHFREQUENZTECHNIK
Slide 16
Thomas Neubauer June 12, 2002 7th LS Seminar Day
Planning Example
Where do we have bad/no service/coverage? How does the outage-probability look like? Smart Antennas - optimum penetration/locations Where do we have to invest money? INSTITUT FÜR NACHRICHTENTECHNIK UND HOCHFREQUENZTECHNIK
Slide 17
Thomas Neubauer June 12, 2002 7th LS Seminar Day
Capacity Increase BS power [dBm] Sector antenna
37.4
UL load [%]
Throughput [kbit/s/cell]
23.8
920
+75% Smart Antennas No planning
36.0
Smart Antennas + Opt. Radio Network Planning
36.7
14.2
1610
+36% 19.4
2193
Smart Antenna radio network planning/optimization will boost the capacity by more than 30%! INSTITUT FÜR NACHRICHTENTECHNIK UND HOCHFREQUENZTECHNIK
Slide 18
Thomas Neubauer June 12, 2002 7th LS Seminar Day
Antenna Size and Tower Loading •
TDMA-1900 Adaptive Antenna
•
Broadcast beam with sector coverage
•
Low profile microstrip patch elements
•
Dual polarized (±45°) antenna
•
Dimensions: Height: 0.66 m Width: 0.45 m
11 antenna antenna replacing replacing 33 old old antennas antennas INSTITUT FÜR NACHRICHTENTECHNIK UND HOCHFREQUENZTECHNIK
Slide 19
Thomas Neubauer June 12, 2002 7th LS Seminar Day
Outline
Motivation Smart Antenna Overview Smart Antenna Planning Challenges Planning Example Results and Solutions Conclusions
INSTITUT FÜR NACHRICHTENTECHNIK UND HOCHFREQUENZTECHNIK
Slide 20
Thomas Neubauer June 12, 2002 7th LS Seminar Day
Conclusions • Smart Antennas will resolve capacity/coverage and site acquisition problems in high data rate 3G systems • Spatio-temporal channel models, accurate interference models and base band signal processing have to be considered for Smart Antenna deployment • Enhanced Smart Antenna radio network planning/optim. offers an additional capacity gain of more than 30% • Smart Antennas will be mass market products within the next few years • Smart Antenna operation and support software tools are available for 3G systems INSTITUT FÜR NACHRICHTENTECHNIK UND HOCHFREQUENZTECHNIK
Slide 21
Thomas Neubauer June 12, 2002 7th LS Seminar Day
[email protected] www.nt.tuwien.ac.at/mobile www.nt.tuwien.ac.at/mobile/staff/Thomas.Neubauer INSTITUT FÜR NACHRICHTENTECHNIK UND HOCHFREQUENZTECHNIK
Slide 22
Thomas Neubauer June 12, 2002 7th LS Seminar Day
