richtfunk - hochschule rheinmain · pdf fileceragon spezifisches rfu-c interface direct and...
TRANSCRIPT
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als Ergänzung zur Glasfaser im Breitbandausbau
08.05. 2015
Richtfunk
Hochschule RheinMain– Oliver Meffert
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Proprietary and Confidential
Agenda
2
• Die Herausforderung
• Lösungsansatz
• Systemtechnik
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Die Herausforderung
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Proprietary and Confidential 4
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Proprietary and Confidential 5
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Proprietary and Confidential
Wozu Breitband auf dem Land? Wusstest Du, dass das durschnitt-liche europäische Huhn täglich 0,73 Eier mehr legt als wir??
Ich habs gegoogelt.
Oh, wirklich? Woher weisst Du das?
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Proprietary and Confidential 5/8/2015 7
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Proprietary and Confidential
Wachstum des Datendurchsatzes mit 3G und 4G
8
Quelle: Orange
Quelle: Nokia Siemens Networks
Quelle: “3” , UK
Quelle: Heavy Reading, Ethernet Backhaul
Quarterly Market Tracker
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Proprietary and Confidential 9
Weisse Flecken
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Proprietary and Confidential 10
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Proprietary and Confidential 11
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Proprietary and Confidential 12
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Lösungsansatz
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1. Nicht verfügbar sind
14
Why Use Microwave?
Wo Glasfaser und Festnetz:
Richtfunk kann
ÜBERALL eingesetzt werden
Warum Richtfunk ?
2. Zu teuer sind
3. Zu zeitaufwendig sind
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Proprietary and Confidential
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Punkt-zu-Punkt Richtfunk (PtP)
• drahtlose Nachrichtenübertragung
• geradlinige Wellenausbreitung
• stark bündelnde Antennen
• Sichtverbindung
• größere Entfernungen durch hops
Was ist Richtfunk?
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4 2
l
R d mit R>>l:
Beispiel: R=20 km, f=26 GHz -> r = 8m R=10 km, f=26 GHz -> r = 5m R=20 km, f=38 GHz -> r = 6m R=10 km, f=38 GHz -> r = 4m
direkter Strahl
Strahl über 1. Fresnelzone
2. Fresnelzone
R = Abstand der Standorte
d = Durchmesser der Fresnelzone
Wellenlänge = l
Standort B Standort A
Reflektionspunkt
1. Fresnelzone
r
[ ] [ ] [ ]
r R
f m
Km
GHz = 8 67 , oder
d R
2 4 4
2
=
+
l l
Wie funktioniert Richtfunk?
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Proprietary and Confidential 1
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Grundlagen: Modulation BPSK – 16 QAM
1 Bit/Symbol/Hz
2 Bit/Symbol/Hz
4 Bit/Symbol/Hz
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Proprietary and Confidential 1
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Grundlagen: Modulation 128 QAM
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Proprietary and Confidential 2
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Grundlagen: Modulation 256 QAM
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Grundlagen: Modulation 1024 QAM
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Grundlagen: Modulation 2048 QAM
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Grundlagen: Modulation
QAM256 & 28MHz Kanalbandbreite
8 Bit x 28.000.000 Abtastungen/s
Übertragungsbandbreite= 224.000.000 Bit/s
Übertragungsbandbreite = 214 Mbit/s
QAM256 & 56MHz Kanalbandbreite
10 Bit x 56.000.000 Abtastungen/s
Übertragungsbandbreite= 560.000.000 Bit/s
Übertragungsbandbreite = 534 Mbit/s
Modulation bedeutet das Aufbringen eines Nutzsignals auf das Trägersignal
BPSK 1 Bit QPSK 2 Bit QAM 8 3 Bit QAM 16 4 Bit QAM 32 5 Bit QAM 64 6 Bit QAM 128 7 Bit QAM 256 8 Bit QAM 1024 9 Bit QAM 2048 10 Bit
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Linkbudget
Funkfeldlänge
0 0
IDUIDU
Leistung P
[dBm]
40
20
- 20
- 40
- 60
- 80
Schwundreserveminimaler
Empfangspegel
IDU
ODUODU
Sendeleistung
Pout
Antennen-
Gewinn Gt
Freiraumdämpfung
a0
Antennen-
Gewinn Gr
Empfangspegel
Pin
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Regendämpfung
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Reichweite
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Reichweite: Typische Funkfeldlängen
Frequenzband GHz
Frequenzbereich MHz
Typ. Funkfeldlänge km
Übertragungsraten MBit/s
Kanalraster ( MHz ) => Mindestübertragungsrate (MBit/s)
4 3800 - 4200 20 ... 60 155 29,0 => 155
6,2 5925 – 6425 20 ... 60 155 29,65 => 155
6,8 6425 - 7125 20 ... 50 2 x 155 40,0 => 2 x 155 80,0 => STM 4 / 2xSTM2
7,2 7137 – 7413 20 ... 55 155 1,0 => 2 3,5 => 2 7,0 => 8 14,0 => 34
7,5 7425 - 7725 20 ... 45 155 28,0 => 155
13 12750 - 13250 20 ... 40 155 28,0 => 155
15 14500 – 14620 15230 – 15350
10 ... 35 2 ... 51 1,75 => 2 3,5 => 2 7,0 => 8 14,0 => 16
18 17700 – 19700 6 ... 25 34 ... 155 3,75 => 34 27,5 => 51 55,0 => 155
26 24500 – 26500
UB:25137-25445 OB:26145-26453
3 ... 10 2 ... 155 3,5 => 2 7,0 => 8 14,0 => 16 28,0 => 34 56,0 => 155 112 => STM 4 / 2xSTM 2
38 37000 - 37900 0,3 ... 6 2 ... 155 7,0 => 2 / 8 14,0 => 16 28,0 => 34 56,0 => 155 140,0 => STM 4 / 2xSTM 2
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Systemtechnik All-Outdoor
28
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Proprietary and Confidential
Wachstum des Datendurchsatzes mit 3G und 4G
29
Quelle: Orange
Quelle: Nokia Siemens Networks
Quelle: “3” , UK
Quelle: Heavy Reading, Ethernet Backhaul
Quarterly Market Tracker
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Proprietary and Confidential
Richtfunk (R)evolution
30
Modulationsumfang ACM 4-2048 QAM
(11 ACM points)
Frequenzbaender 6-42 GHz
Kanalbandbreiten 3.5 – 56 MHz
System Konfigurationen 1+0,1+1HSB, 2+0 SP/DP, 4+0SP/DP, 2+2HSB
2x2, 4x4 LoS MIMO
Traffic Manager “Smart Pipe”
Integrierter Switch
Power over Ethernet Standard & proprietary (IEEE 802.3at)
Kompakte Bauweise 24x22x10 cm
Antennen Ceragon spezifisches RFU-C Interface
Direct and Remote mount - Standard Flange
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Anschlüsse
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Konfigurationen Ceragon Standard Antenna Interface
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Single Pol. Splitter
Dual Pol. OMT
2+0 DP ACAP
28MHz V
28MHz H
2+0 SP
28MHz 28MHz
2+0 DP CCDP
28MHz V
28MHz H
OR
OR
2+0 SP/DP Direct Mount
IP-20C
IP-20C - Simple and quick installation
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56MHz 56MHz
Beispiel: 2+2 HSB Single Polarisation
33
2+2HSB SP
56MHz 56MHz
Splitter
Dual Coupler
Flexible, Easy to Install direct mount options
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Enhanced by Multi-Core innovation
LoS 4x4 MIMO Bandbreite x Faktor 4
LoS: Line-of-Sight
MIMO: Multiple-Input & Multiple-Output
FibeAir IP-20C 4x4 MIMO
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Line-of-Sight (LoS) MIMO
Site 1
Site 2
V
H V
H
1 Gbit/s mit nur einem
28 MHz Kanal (V+H)
• Bandbreite x 4 auf einem einzelnen Kanal
• 2x IP-20C an jedem Standort
• Effiziente Nutzung des Spektrums
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LoS MIMO – Grundlagen(I)
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h1
h2
𝑑11
𝑑12
𝑑21
𝑑22
Signal A
Signal B
A + B
A - B
DSP
DSP
(𝑑12−𝑑11)+(𝑑21−𝑑22)=𝜆/2
(∅12−∅11)+(∅21-∅22)=𝜋
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LoS MIMO – Grundlagen (II)
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• Gleiches Signal trifft mit verschiedenen
Phasenlagen auf verschiedene Antennen
• Beeinflussung der Phasenlage durch
Veraenderung der Pfadlaenge (𝒅𝒊𝒋)
• Pfadlaenge wird beeinflusst durch die
Antennenabstaende (𝒉𝟏, 𝒉𝟐)
• Damit erhaelt man den optimalen
Antennenabstand um LoS MIMO
moeglichst stabil zu betreiben
ℎ1 ∙ ℎ2 =𝐷 ∙ 𝑐
2𝑓
h1, h2: Antennas’ Separation [m]
D: Link Distance [m]
c: Speed of Light 3 × 108 m
sec
f: Link Frequency [Hz]
Special case: 𝒉𝟏 = 𝒉𝟐 ≝ 𝒉𝒐𝒑𝒕𝒊𝒎𝒂𝒍
𝒉𝒐𝒑𝒕𝒊𝒎𝒂𝒍 =𝑫 ∙ 𝒄
𝟐𝒇
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LoS MIMO – Optimaler Antennenabstand
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MIMO Datendurchsatz vs. Antennenabstand
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Optimal Antenna Separation Capacity vs. Antenna Separation
Man erreicht 70% der maximalen Datenrate bei halbem
optimalem Antennenabstand (auf beiden Endstellen!)
Streckenlaenge[km]
Op
tim
ale
r A
nte
nn
en
ab
sta
nd
[m
]
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LoS MIMO Installation
Horizontale
Montage
Vertikale
Montage
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• Gleiches All-Outdoor Gehaeuse
E-Band (70/80 GHz) System
• Hohe Verfügbarkeit durch Lizenzierung
• Hohe Datenrate von bis zu 2.5 GBit/s
Modulation bis 256QAM
• 250/500 MHz Kanalbandbreite
• PoE oder -48V DC
Spannungsversorgung
• Entfernungen bis ca. 2 km
Eband 70/80 GHz Bereich
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Installationsbeispiel
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Danke!